US20030217629A1 - Circular saw having a saw arm angle adjusting device - Google Patents
Circular saw having a saw arm angle adjusting device Download PDFInfo
- Publication number
- US20030217629A1 US20030217629A1 US10/153,783 US15378302A US2003217629A1 US 20030217629 A1 US20030217629 A1 US 20030217629A1 US 15378302 A US15378302 A US 15378302A US 2003217629 A1 US2003217629 A1 US 2003217629A1
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- United States
- Prior art keywords
- saw
- adjusting device
- unit
- saw arm
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/29—Details; Component parts; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/04—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever
- B23D45/042—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever
- B23D45/044—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever the saw blade being adjustable according to angle of cut
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7684—With means to support work relative to tool[s]
- Y10T83/7693—Tool moved relative to work-support during cutting
- Y10T83/7697—Tool angularly adjustable relative to work-support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7684—With means to support work relative to tool[s]
- Y10T83/7701—Supporting surface and tool axis angularly related
- Y10T83/7705—Adjustable angular relationship
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7684—With means to support work relative to tool[s]
- Y10T83/7722—Support and tool relatively adjustable
- Y10T83/7726—By movement of the tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7755—Carrier for rotatable tool movable during cutting
- Y10T83/7788—Tool carrier oscillated or rotated
Definitions
- the present invention relates to a circular saw having a saw arm angle adjusting device, and more particularly to a circular saw having a saw arm angle adjusting device, wherein the user may directly operate the drive shaft, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.
- a conventional circular saw in accordance with the prior art comprises a base, a saw arm mounted on the base, and a saw blade mounted on the saw arm.
- the saw arm may be moved toward the base for cutting the workpiece on the base by the rotating saw blade.
- the conventional circular saw also comprises an adjusting device for adjusting the angle of the saw arm relative to the base, so that the saw arm is inclined with the base.
- the cutting face of the workpiece may be cut to have an inclined shape.
- the adjusting device is usually mounted on the rear portion of the saw arm, so that the user has to move to the rear portion of the saw arm, to operate the adjusting device, thereby causing inconvenience to the user.
- the adjusting device may provide a larger angle adjusting function, and cannot be used to micro-adjust the angle of the saw arm relative to the base.
- the present invention has arisen to mitigate and/or obviate the disadvantage of the conventional adjusting device of the circular saw.
- the primary objective of the present invention is to provide a circular saw having a saw arm angle adjusting device, wherein the distal end of the drive shaft is exposed outward from the bottom face of the base to face the user, so that the user may directly operate the drive shaft without having to move, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.
- Another objective of the present invention is to provide a circular saw having a saw arm angle adjusting device, wherein the gear portion of the driven unit having a smaller tooth number may be used to drive the first gear of the adjusting unit having a greater tooth number, and the second gear of the adjusting unit having a smaller tooth number may be used to drive the gear portion of the rotation shaft having a greater tooth number, thereby saving manual energy, and thereby capable of micro-adjusting the angle of the saw arm relative to the base.
- a circular saw having a saw arm angle adjusting device, comprising a base, a saw arm, a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle, and may be positioned, wherein:
- the rotation shaft is provided with a gear portion, and a fixing bolt is extended through the rotation shaft, and has one end provided with a fixing nut for fixing the rotation shaft to prevent rotation of the rotation shaft;
- the adjusting device includes:
- a drive unit secured on one end of the drive shaft to move therewith, and having a first side formed with a first locking recess, and a second side formed with a second locking recess, for receiving and locking the fixing nut of the fixing bolt when the drive unit is moved to abut the fixing nut of the fixing bolt;
- a driven unit rotatably mounted on the base, the driven unit having one end provided with a locking block that may be inserted into the first locking recess of the drive unit when the drive unit is moved to abut the locking block of the driven unit, the driven unit having an outer wall provided with a gear portion;
- an adjusting unit including a shaft rotatably mounted on the base, a first gear secured on a first end of the shaft and meshing with the gear portion of the driven unit, and a second gear secured on a second end of the shaft and meshing with the gear portion of the rotation shaft.
- the gear portion of the driven unit has a tooth number smaller than that of the first gear of the adjusting unit.
- the second gear of the adjusting unit has a tooth number smaller than that of the gear portion of the rotation shaft.
- the first side of the drive unit is formed with a receiving hole for receiving and securing the drive shaft, so that the drive unit may be moved with the drive shaft.
- the driven unit has an inner wall formed with a through hole for passage of the drive shaft.
- FIG. 1 is a perspective view of a circular saw having a saw arm angle adjusting device in accordance with a preferred embodiment of the present invention
- FIG. 2 is an exploded perspective assembly view of an adjusting device of the circular saw having a saw arm angle adjusting device in accordance with the preferred embodiment of the present invention
- FIG. 3 is a side plan view of the adjusting device of the circular saw having a saw arm angle adjusting device as shown in FIG. 2;
- FIG. 4 is a schematic operational view of the adjusting device of the circular saw having a saw arm angle adjusting device as shown in FIG. 3 in use;
- FIG. 5 is a side plan view of the circular saw having a saw arm angle adjusting device as shown in FIG. 1;
- FIG. 6 is a schematic operational view of the circular saw having a saw arm angle adjusting device as shown in FIG. 6 in use.
- a circular saw having a saw arm angle adjusting device in accordance with a preferred embodiment of the present invention comprises a base 11 , a rotation shaft 21 , a saw arm 31 , a saw blade 41 , and an adjusting device 51 for adjusting the angle of the saw arm 31 .
- the base 11 may be made with a disk shape, and has a center formed with a cutting slot 12 .
- the rotation shaft 21 is rotatably mounted on an outer edge of the base 1 , and may be rotated relative to the base 11 .
- the rotation shaft 21 has a distal end provided with a gear portion 22 .
- a fixing bolt 23 is extended through the rotation shaft 21 , and has one end which is extended into a bottom face of the base 11 and is provided with a hexagonal fixing nut 24 for fixing the rotation shaft 21 to prevent rotation of the rotation shaft 21 .
- the saw arm 31 has a first end pivotally mounted on the distal end of the rotation shaft 21 , so that the saw arm 31 may swing.
- the saw blade 41 is rotatably mounted on a raised second end of the saw arm 31 , and may be rotated successively by input of an electric power. When the saw arm 31 is pressed to move toward the base 11 , the saw blade 41 may be inserted into the cutting slot 12 of the base 11 .
- the adjusting device 51 is mounted on the bottom face of the base 11 , and includes a drive shaft 52 , a drive unit 53 , a driven unit 54 , and an adjusting unit 55 .
- the drive shaft 52 is an elongated rod, and has a first end extended into the bottom face of the base 11 , and a second end exposed outward from the bottom face of the base 11 .
- the drive shaft 52 may be moved axially in a push or pull manner.
- the drive unit 53 is secured on the first end of the drive shaft 52 to move therewith.
- the drive unit 53 has a first side formed with a receiving hole 531 for receiving and securing the first end of the drive shaft 52 by bolts or the like, so that the drive unit 53 may be moved with the drive shaft 52 .
- the receiving hole 531 of the drive unit 53 has a wall formed with a square-shaped first locking recess 533 which has a dimension greater than that of the receiving hole 531 .
- the drive unit 53 has a second side formed with a hexagonal second locking recess 532 that may be used to receive and lock the fixing nut 24 of the fixing bolt 23 when the drive unit 53 is moved to abut the fixing nut 24 of the fixing bolt 23 .
- the driven unit 54 is rotatably mounted on the bottom face of the base 11 . Thus, the driven unit 54 may be rotated and cannot be moved.
- the driven unit 54 has an inner wall formed with a through hole 541 for passage of the drive shaft 52 .
- the driven unit 54 has one end provided with a square-shaped locking block 543 that may be inserted into the first locking recess 533 of the drive unit 53 when the drive unit 53 is moved to abut the locking block 543 of the driven unit 54 .
- the driven unit 54 has an outer wall provided with a gear portion 542 .
- the adjusting unit 55 includes a shaft 551 rotatably mounted on the bottom face of the base 11 , a first gear 552 secured on a first end of the shaft 551 and meshing with the gear portion 542 of the driven unit 54 , and a second gear 553 secured on a second end of the shaft 551 and meshing with the gear portion 22 of the rotation shaft 21 .
- the bottom face of the base 11 is provided with two spaced support blocks 554 and 555 for supporting the shaft 551 , so that the shaft 551 is rotatably mounted on the bottom face of the base 11 .
- the second end of the shaft 551 is passed through the rotation shaft 21 .
- the drive shaft 52 may be pushed into the bottom face of the base 11 , and the drive unit 53 may be moved with the drive shaft 52 to move toward the fixing nut 24 of the fixing bolt 23 , so that the fixing nut 24 of the fixing bolt 23 may be inserted into and secured in the second locking recess 532 of the drive unit 53 . Then, the drive shaft 52 may be rotated to unscrew the fixing nut 24 of the fixing bolt 23 , thereby releasing the rotation shaft 21 from the fixing nut 24 of the fixing bolt 23 , so that the rotation shaft 21 may be rotated freely.
- the drive unit 53 is not combined with the driven unit 54 , and the drive shaft 52 is rotatably and movably mounted in the driven unit 54 , so that when the drive shaft 52 is rotated, the driven unit 54 is not rotated.
- the first gear 552 of the adjusting unit 55 will not be rotated by the gear portion 542 of the driven unit 54 .
- the saw arm 31 may be directly pushed and pivoted, to proceed an adjustment action with a larger angle.
- the angle of the saw arm 31 may be adjusted in the following manner.
- the drive shaft 52 may be outward from the bottom face of the base 11 , and the drive unit 53 may be moved with the drive shaft 52 to move toward the driven unit 54 , so that the locking block 543 of the driven unit 54 may be inserted into and secured in the first locking recess 533 of the drive unit 53 .
- the drive unit 53 may be combined with the driven unit 54 , so that when the drive shaft 52 is rotated, the drive unit 53 may also be rotated with the drive shaft 52 to rotate the driven unit 54 which rotates the gear portion 542 which rotates the first gear 552 of the adjusting unit 55 , so as to rotate the shaft 551 which rotates the second gear 553 of the adjusting unit 55 , so as to rotate the gear portion 22 of the rotation shaft 21 , so that the rotation shaft 21 may be pivoted through a determined angle.
- the pivot arm 31 may be pivoted by rotation of the rotation shaft 21 to move from the position as shown in FIG. 5 to the position as shown in FIG. 6, so as to micro-adjust the angle of the saw arm 31 relative to the base 11 .
- the drive shaft 52 may be pushed into the bottom face of the base 11 again, and the drive unit 53 may be moved with the drive shaft 52 to move toward the fixing nut 24 of the fixing bolt 23 , so that the fixing nut 24 of the fixing bolt 23 may be inserted into and secured in the second locking recess 532 of the drive unit 53 . Then, the drive shaft 52 may be rotated to screw the fixing nut 24 of the fixing bolt 23 , thereby fixing the rotation shaft 21 by the fixing nut 24 of the fixing bolt 23 , so that the rotation shaft 21 cannot be rotated freely.
- the second end of the drive shaft 52 is exposed outward from the bottom face of the base 11 to face the user, so that the user may directly operate the drive shaft 52 without having to move, so as to operate the adjusting device 51 for adjusting the angle of the saw arm 31 relative to the base 11 so that the user may adjust the angle of the saw arm 31 easily and conveniently.
- the gear portion 542 of the driven unit 54 having a smaller tooth number may be used to drive the first gear 552 of the adjusting unit 55 having a greater tooth number
- the second gear 553 of the adjusting unit 55 having a smaller tooth number may be used to drive the gear portion 22 of the rotation shaft 21 having a greater tooth number, thereby saving manual energy, and thereby capable of micro-adjusting the angle of the saw arm 31 relative to the base 11 .
Abstract
A circular saw having a saw arm angle adjusting device includes a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle and may be positioned. The adjusting device includes a drive shaft, a drive unit, a driven unit, and an adjusting unit. Thus, the user may directly operate the drive shaft, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.
Description
- 1. Field of the Invention
- The present invention relates to a circular saw having a saw arm angle adjusting device, and more particularly to a circular saw having a saw arm angle adjusting device, wherein the user may directly operate the drive shaft, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.
- 2. Description of the Related Art
- A conventional circular saw in accordance with the prior art comprises a base, a saw arm mounted on the base, and a saw blade mounted on the saw arm. The saw arm may be moved toward the base for cutting the workpiece on the base by the rotating saw blade. The conventional circular saw also comprises an adjusting device for adjusting the angle of the saw arm relative to the base, so that the saw arm is inclined with the base. Thus, the cutting face of the workpiece may be cut to have an inclined shape. The adjusting device is usually mounted on the rear portion of the saw arm, so that the user has to move to the rear portion of the saw arm, to operate the adjusting device, thereby causing inconvenience to the user. In addition, the adjusting device may provide a larger angle adjusting function, and cannot be used to micro-adjust the angle of the saw arm relative to the base.
- The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional adjusting device of the circular saw.
- The primary objective of the present invention is to provide a circular saw having a saw arm angle adjusting device, wherein the distal end of the drive shaft is exposed outward from the bottom face of the base to face the user, so that the user may directly operate the drive shaft without having to move, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.
- Another objective of the present invention is to provide a circular saw having a saw arm angle adjusting device, wherein the gear portion of the driven unit having a smaller tooth number may be used to drive the first gear of the adjusting unit having a greater tooth number, and the second gear of the adjusting unit having a smaller tooth number may be used to drive the gear portion of the rotation shaft having a greater tooth number, thereby saving manual energy, and thereby capable of micro-adjusting the angle of the saw arm relative to the base.
- In accordance with the present invention, there is provided a circular saw having a saw arm angle adjusting device, comprising a base, a saw arm, a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle, and may be positioned, wherein:
- the rotation shaft is provided with a gear portion, and a fixing bolt is extended through the rotation shaft, and has one end provided with a fixing nut for fixing the rotation shaft to prevent rotation of the rotation shaft; and
- the adjusting device includes:
- a drive shaft, moved axially;
- a drive unit, secured on one end of the drive shaft to move therewith, and having a first side formed with a first locking recess, and a second side formed with a second locking recess, for receiving and locking the fixing nut of the fixing bolt when the drive unit is moved to abut the fixing nut of the fixing bolt;
- a driven unit, rotatably mounted on the base, the driven unit having one end provided with a locking block that may be inserted into the first locking recess of the drive unit when the drive unit is moved to abut the locking block of the driven unit, the driven unit having an outer wall provided with a gear portion; and
- an adjusting unit, including a shaft rotatably mounted on the base, a first gear secured on a first end of the shaft and meshing with the gear portion of the driven unit, and a second gear secured on a second end of the shaft and meshing with the gear portion of the rotation shaft.
- Preferably, the gear portion of the driven unit has a tooth number smaller than that of the first gear of the adjusting unit.
- Preferably, the second gear of the adjusting unit has a tooth number smaller than that of the gear portion of the rotation shaft.
- Preferably, the first side of the drive unit is formed with a receiving hole for receiving and securing the drive shaft, so that the drive unit may be moved with the drive shaft.
- Preferably, the driven unit has an inner wall formed with a through hole for passage of the drive shaft.
- Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
- FIG. 1 is a perspective view of a circular saw having a saw arm angle adjusting device in accordance with a preferred embodiment of the present invention;
- FIG. 2 is an exploded perspective assembly view of an adjusting device of the circular saw having a saw arm angle adjusting device in accordance with the preferred embodiment of the present invention;
- FIG. 3 is a side plan view of the adjusting device of the circular saw having a saw arm angle adjusting device as shown in FIG. 2;
- FIG. 4 is a schematic operational view of the adjusting device of the circular saw having a saw arm angle adjusting device as shown in FIG. 3 in use;
- FIG. 5 is a side plan view of the circular saw having a saw arm angle adjusting device as shown in FIG. 1; and
- FIG. 6 is a schematic operational view of the circular saw having a saw arm angle adjusting device as shown in FIG. 6 in use.
- Referring to the drawings and initially to FIGS.1-3, a circular saw having a saw arm angle adjusting device in accordance with a preferred embodiment of the present invention comprises a
base 11, arotation shaft 21, asaw arm 31, asaw blade 41, and anadjusting device 51 for adjusting the angle of thesaw arm 31. - The
base 11 may be made with a disk shape, and has a center formed with acutting slot 12. - The
rotation shaft 21 is rotatably mounted on an outer edge of thebase 1, and may be rotated relative to thebase 11. Therotation shaft 21 has a distal end provided with agear portion 22. Afixing bolt 23 is extended through therotation shaft 21, and has one end which is extended into a bottom face of thebase 11 and is provided with ahexagonal fixing nut 24 for fixing therotation shaft 21 to prevent rotation of therotation shaft 21. - The
saw arm 31 has a first end pivotally mounted on the distal end of therotation shaft 21, so that thesaw arm 31 may swing. - The
saw blade 41 is rotatably mounted on a raised second end of thesaw arm 31, and may be rotated successively by input of an electric power. When thesaw arm 31 is pressed to move toward thebase 11, thesaw blade 41 may be inserted into thecutting slot 12 of thebase 11. - The adjusting
device 51 is mounted on the bottom face of thebase 11, and includes adrive shaft 52, adrive unit 53, a drivenunit 54, and an adjustingunit 55. - The
drive shaft 52 is an elongated rod, and has a first end extended into the bottom face of thebase 11, and a second end exposed outward from the bottom face of thebase 11. Thedrive shaft 52 may be moved axially in a push or pull manner. - The
drive unit 53 is secured on the first end of thedrive shaft 52 to move therewith. Thedrive unit 53 has a first side formed with a receivinghole 531 for receiving and securing the first end of thedrive shaft 52 by bolts or the like, so that thedrive unit 53 may be moved with thedrive shaft 52. Thereceiving hole 531 of thedrive unit 53 has a wall formed with a square-shapedfirst locking recess 533 which has a dimension greater than that of the receivinghole 531. Thedrive unit 53 has a second side formed with a hexagonalsecond locking recess 532 that may be used to receive and lock thefixing nut 24 of thefixing bolt 23 when thedrive unit 53 is moved to abut thefixing nut 24 of thefixing bolt 23. - The driven
unit 54 is rotatably mounted on the bottom face of thebase 11. Thus, the drivenunit 54 may be rotated and cannot be moved. The drivenunit 54 has an inner wall formed with athrough hole 541 for passage of thedrive shaft 52. The drivenunit 54 has one end provided with a square-shaped locking block 543 that may be inserted into thefirst locking recess 533 of thedrive unit 53 when thedrive unit 53 is moved to abut thelocking block 543 of the drivenunit 54. The drivenunit 54 has an outer wall provided with agear portion 542. - The adjusting
unit 55 includes ashaft 551 rotatably mounted on the bottom face of thebase 11, afirst gear 552 secured on a first end of theshaft 551 and meshing with thegear portion 542 of the drivenunit 54, and asecond gear 553 secured on a second end of theshaft 551 and meshing with thegear portion 22 of therotation shaft 21. Preferably, the bottom face of thebase 11 is provided with two spacedsupport blocks shaft 551, so that theshaft 551 is rotatably mounted on the bottom face of thebase 11. The second end of theshaft 551 is passed through therotation shaft 21. - In operation, referring to FIGS. 4 and 5, the
drive shaft 52 may be pushed into the bottom face of thebase 11, and thedrive unit 53 may be moved with thedrive shaft 52 to move toward thefixing nut 24 of thefixing bolt 23, so that thefixing nut 24 of thefixing bolt 23 may be inserted into and secured in thesecond locking recess 532 of thedrive unit 53. Then, thedrive shaft 52 may be rotated to unscrew thefixing nut 24 of thefixing bolt 23, thereby releasing therotation shaft 21 from thefixing nut 24 of thefixing bolt 23, so that therotation shaft 21 may be rotated freely. - It is appreciated that, the
drive unit 53 is not combined with the drivenunit 54, and thedrive shaft 52 is rotatably and movably mounted in the drivenunit 54, so that when thedrive shaft 52 is rotated, the drivenunit 54 is not rotated. Thus, thefirst gear 552 of the adjustingunit 55 will not be rotated by thegear portion 542 of the drivenunit 54. - At this time, the
saw arm 31 may be directly pushed and pivoted, to proceed an adjustment action with a larger angle. In addition, the angle of thesaw arm 31 may be adjusted in the following manner. - Referring to FIGS. 3 and 6, the
drive shaft 52 may be outward from the bottom face of thebase 11, and thedrive unit 53 may be moved with thedrive shaft 52 to move toward the drivenunit 54, so that thelocking block 543 of the drivenunit 54 may be inserted into and secured in thefirst locking recess 533 of thedrive unit 53. Thus, thedrive unit 53 may be combined with the drivenunit 54, so that when thedrive shaft 52 is rotated, thedrive unit 53 may also be rotated with thedrive shaft 52 to rotate the drivenunit 54 which rotates thegear portion 542 which rotates thefirst gear 552 of the adjustingunit 55, so as to rotate theshaft 551 which rotates thesecond gear 553 of the adjustingunit 55, so as to rotate thegear portion 22 of therotation shaft 21, so that therotation shaft 21 may be pivoted through a determined angle. Thus, thepivot arm 31 may be pivoted by rotation of therotation shaft 21 to move from the position as shown in FIG. 5 to the position as shown in FIG. 6, so as to micro-adjust the angle of thesaw arm 31 relative to thebase 11. - After the angle of the
saw arm 31 relative to thebase 11 is adjusted, thedrive shaft 52 may be pushed into the bottom face of the base 11 again, and thedrive unit 53 may be moved with thedrive shaft 52 to move toward the fixingnut 24 of the fixingbolt 23, so that the fixingnut 24 of the fixingbolt 23 may be inserted into and secured in thesecond locking recess 532 of thedrive unit 53. Then, thedrive shaft 52 may be rotated to screw the fixingnut 24 of the fixingbolt 23, thereby fixing therotation shaft 21 by the fixingnut 24 of the fixingbolt 23, so that therotation shaft 21 cannot be rotated freely. - Accordingly, the second end of the
drive shaft 52 is exposed outward from the bottom face of the base 11 to face the user, so that the user may directly operate thedrive shaft 52 without having to move, so as to operate the adjustingdevice 51 for adjusting the angle of thesaw arm 31 relative to the base 11 so that the user may adjust the angle of thesaw arm 31 easily and conveniently. - In addition, the
gear portion 542 of the drivenunit 54 having a smaller tooth number may be used to drive thefirst gear 552 of the adjustingunit 55 having a greater tooth number, and thesecond gear 553 of the adjustingunit 55 having a smaller tooth number may be used to drive thegear portion 22 of therotation shaft 21 having a greater tooth number, thereby saving manual energy, and thereby capable of micro-adjusting the angle of thesaw arm 31 relative to thebase 11. - Although the invention has been explained in relation to its preferred embodiment as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
Claims (5)
1. A circular saw having a saw arm angle adjusting device, comprising a base, a saw arm, a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle, and may be positioned, wherein:
the rotation shaft is provided with a gear portion, and a fixing bolt is extended through the rotation shaft, and has one end provided with a fixing nut for fixing the rotation shaft to prevent rotation of the rotation shaft; and
the adjusting device includes:
a drive shaft, moved axially;
a drive unit, secured on one end of the drive shaft to move therewith, and having a first side formed with a first locking recess, and a second side formed with a second locking recess, for receiving and locking the fixing nut of the fixing bolt when the drive unit is moved to abut the fixing nut of the fixing bolt;
a driven unit, rotatably mounted on the base, the driven unit having one end provided with a locking block that may be inserted into the first locking recess of the drive unit when the drive unit is moved to abut the locking block of the driven unit, the driven unit having an outer wall provided with a gear portion; and
an adjusting unit, including a shaft rotatably mounted on the base, a first gear secured on a first end of the shaft and meshing with the gear portion of the driven unit, and a second gear secured on a second end of the shaft and meshing with the gear portion of the rotation shaft.
2. The circular saw having a saw arm angle adjusting device in accordance with claim 1 , wherein the gear portion of the driven unit has a tooth number smaller than that of the first gear of the adjusting unit.
3. The circular saw having a saw arm angle adjusting device in accordance with claim 1 , wherein the second gear of the adjusting unit has a tooth number smaller than that of the gear portion of the rotation shaft.
4. The circular saw having a saw arm angle adjusting device in accordance with claim 1 , wherein the first side of the drive unit is formed with a receiving hole for receiving and securing the drive shaft, so that the drive unit may be moved with the drive shaft.
5. The circular saw having a saw arm angle adjusting device in accordance with claim 1 , wherein the driven unit has an inner wall formed with a through hole for passage of the drive shaft.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/153,783 US6662697B1 (en) | 2002-05-24 | 2002-05-24 | Circular saw having a saw arm angle adjusting device |
DE2002208202 DE20208202U1 (en) | 2002-05-24 | 2002-05-25 | Circular saw with an angle adjustment device for the saw arm |
GB0212350A GB2389071B (en) | 2002-05-24 | 2002-05-29 | Circular saw having a saw arm angle adjusting device |
CA 2390045 CA2390045A1 (en) | 2002-05-24 | 2002-06-07 | Circular saw having a saw arm angle adjusting device |
FR0207078A FR2840553B3 (en) | 2002-05-24 | 2002-06-10 | CIRCULAR SAW PROVIDED WITH A DEVICE FOR ADJUSTING THE ANGLE OF THE SAW ARM |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/153,783 US6662697B1 (en) | 2002-05-24 | 2002-05-24 | Circular saw having a saw arm angle adjusting device |
DE2002208202 DE20208202U1 (en) | 2002-05-24 | 2002-05-25 | Circular saw with an angle adjustment device for the saw arm |
GB0212350A GB2389071B (en) | 2002-05-24 | 2002-05-29 | Circular saw having a saw arm angle adjusting device |
CA 2390045 CA2390045A1 (en) | 2002-05-24 | 2002-06-07 | Circular saw having a saw arm angle adjusting device |
FR0207078A FR2840553B3 (en) | 2002-05-24 | 2002-06-10 | CIRCULAR SAW PROVIDED WITH A DEVICE FOR ADJUSTING THE ANGLE OF THE SAW ARM |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030217629A1 true US20030217629A1 (en) | 2003-11-27 |
US6662697B1 US6662697B1 (en) | 2003-12-16 |
Family
ID=32046084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/153,783 Expired - Fee Related US6662697B1 (en) | 2002-05-24 | 2002-05-24 | Circular saw having a saw arm angle adjusting device |
Country Status (5)
Country | Link |
---|---|
US (1) | US6662697B1 (en) |
CA (1) | CA2390045A1 (en) |
DE (1) | DE20208202U1 (en) |
FR (1) | FR2840553B3 (en) |
GB (1) | GB2389071B (en) |
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US20030150311A1 (en) * | 2002-02-11 | 2003-08-14 | Carroll Craig Allen | Remotely actuated beveling systems for a miter saw |
JP2006015574A (en) * | 2004-06-30 | 2006-01-19 | Hitachi Koki Co Ltd | Bench circular saw |
US20060101971A1 (en) * | 2004-01-30 | 2006-05-18 | Vance Roe | Miter saw workpiece stop |
US20070039441A1 (en) * | 2004-10-21 | 2007-02-22 | Lawrence Lacy | Multi-function power saw |
US7228774B2 (en) | 2002-06-21 | 2007-06-12 | Black & Decker Inc. | Adjustable cleat |
US20090223339A1 (en) * | 2008-03-05 | 2009-09-10 | Durq Machinery Corp. | Miter saw having securable positioning structure for blade guard thereof |
US20100058909A1 (en) * | 2008-09-11 | 2010-03-11 | Shaodong Chen | Power tool |
CN101954648A (en) * | 2010-06-08 | 2011-01-26 | 昆山新莱洁净应用材料股份有限公司 | Bar stock cutting device |
US20110067542A1 (en) * | 2009-09-24 | 2011-03-24 | Lawrence Oliver Lacy | Multi-Function Power Saw with Tilt Cut |
US20170095867A1 (en) * | 2015-10-02 | 2017-04-06 | Rexon Industrial Corp., Ltd. | Workpiece support device for circular saw |
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US7311028B2 (en) * | 2002-06-25 | 2007-12-25 | Black & Decker Inc. | Front bevel indicator/front bevel lock |
US6994007B2 (en) | 2002-07-09 | 2006-02-07 | Black & Decker Inc. | Chop saw |
US7201090B2 (en) * | 2002-10-16 | 2007-04-10 | Robert Bosch Gmbh | Front-accessible bevel locking system |
US6860183B1 (en) * | 2003-04-22 | 2005-03-01 | Rexon Co., Ltd. | Circular saw having saw arm angle adjusting device |
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US20050247177A1 (en) | 2004-04-15 | 2005-11-10 | Hetcher Jason D | Table and base assembly for a power tool |
US8061251B2 (en) * | 2004-04-15 | 2011-11-22 | Milwaukee Electric Tool Corporation | Miter adjustment assembly for a saw |
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US7430949B2 (en) * | 2005-07-07 | 2008-10-07 | Rexon Co., Ltd. | Angle adjustment device for a pivot arm of a circular saw |
CN201760668U (en) * | 2010-06-28 | 2011-03-16 | 南京德朔实业有限公司 | Miter saw |
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US10710267B2 (en) | 2017-07-10 | 2020-07-14 | Milwaukee Electric Tool Corporation | Miter saw |
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US5040444A (en) * | 1989-08-30 | 1991-08-20 | Ryobi Limited | Saw blade position setting apparatus |
US20030024365A1 (en) * | 2001-08-02 | 2003-02-06 | Lee-Cheng Chang | Locking mechanism for inclination adjustment of a blade of a cutting device |
US20030110914A1 (en) * | 2001-08-10 | 2003-06-19 | One World Technologies, Inc. | Bevel adjustment mechanism for a compound miter saw |
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JPH0518082Y2 (en) * | 1987-02-20 | 1993-05-14 | ||
US5054352A (en) * | 1989-01-17 | 1991-10-08 | Makita Electric Wroks, Ltd. | Miter saw |
EP0570904B1 (en) * | 1992-05-22 | 1997-08-13 | Makita Corporation | Miter saw |
-
2002
- 2002-05-24 US US10/153,783 patent/US6662697B1/en not_active Expired - Fee Related
- 2002-05-25 DE DE2002208202 patent/DE20208202U1/en not_active Expired - Lifetime
- 2002-05-29 GB GB0212350A patent/GB2389071B/en not_active Expired - Fee Related
- 2002-06-07 CA CA 2390045 patent/CA2390045A1/en not_active Abandoned
- 2002-06-10 FR FR0207078A patent/FR2840553B3/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US2844173A (en) * | 1954-09-13 | 1958-07-22 | King Seely Corp | Arbor saw with single handle control of tilt and elevation |
US5040444A (en) * | 1989-08-30 | 1991-08-20 | Ryobi Limited | Saw blade position setting apparatus |
US20030024365A1 (en) * | 2001-08-02 | 2003-02-06 | Lee-Cheng Chang | Locking mechanism for inclination adjustment of a blade of a cutting device |
US20030110914A1 (en) * | 2001-08-10 | 2003-06-19 | One World Technologies, Inc. | Bevel adjustment mechanism for a compound miter saw |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7127977B2 (en) | 2002-02-11 | 2006-10-31 | Porter-Cable/Delta | Remotely actuated beveling systems for a miter saw |
US20030150311A1 (en) * | 2002-02-11 | 2003-08-14 | Carroll Craig Allen | Remotely actuated beveling systems for a miter saw |
US7228774B2 (en) | 2002-06-21 | 2007-06-12 | Black & Decker Inc. | Adjustable cleat |
US20060101971A1 (en) * | 2004-01-30 | 2006-05-18 | Vance Roe | Miter saw workpiece stop |
JP4743472B2 (en) * | 2004-06-30 | 2011-08-10 | 日立工機株式会社 | Tabletop cutting machine |
JP2006015574A (en) * | 2004-06-30 | 2006-01-19 | Hitachi Koki Co Ltd | Bench circular saw |
US20070039441A1 (en) * | 2004-10-21 | 2007-02-22 | Lawrence Lacy | Multi-function power saw |
US8122802B2 (en) * | 2004-10-21 | 2012-02-28 | Lawrence Lacy | Multi-function power saw |
US20090223339A1 (en) * | 2008-03-05 | 2009-09-10 | Durq Machinery Corp. | Miter saw having securable positioning structure for blade guard thereof |
US7779736B2 (en) * | 2008-03-05 | 2010-08-24 | Durq Machinery Corp. | Miter saw having securable positioning structure for blade guard thereof |
US20100058909A1 (en) * | 2008-09-11 | 2010-03-11 | Shaodong Chen | Power tool |
US20110067542A1 (en) * | 2009-09-24 | 2011-03-24 | Lawrence Oliver Lacy | Multi-Function Power Saw with Tilt Cut |
CN101954648A (en) * | 2010-06-08 | 2011-01-26 | 昆山新莱洁净应用材料股份有限公司 | Bar stock cutting device |
US20170095867A1 (en) * | 2015-10-02 | 2017-04-06 | Rexon Industrial Corp., Ltd. | Workpiece support device for circular saw |
Also Published As
Publication number | Publication date |
---|---|
DE20208202U1 (en) | 2002-08-22 |
GB0212350D0 (en) | 2002-07-10 |
GB2389071B (en) | 2005-06-08 |
GB2389071A (en) | 2003-12-03 |
CA2390045A1 (en) | 2003-12-07 |
FR2840553B3 (en) | 2004-05-28 |
FR2840553A3 (en) | 2003-12-12 |
US6662697B1 (en) | 2003-12-16 |
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