CN100400211C - Motor and transmission construction for a hand-held tool - Google Patents
Motor and transmission construction for a hand-held tool Download PDFInfo
- Publication number
- CN100400211C CN100400211C CNB038045788A CN03804578A CN100400211C CN 100400211 C CN100400211 C CN 100400211C CN B038045788 A CNB038045788 A CN B038045788A CN 03804578 A CN03804578 A CN 03804578A CN 100400211 C CN100400211 C CN 100400211C
- Authority
- CN
- China
- Prior art keywords
- motor
- drive shaft
- motor drive
- shell
- gear
- 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.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 title 1
- 239000000725 suspension Substances 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- 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
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
-
- 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
- B27B9/00—Portable power-driven circular saws for manual operation
Abstract
The invention relates to a hand-held tool, comprising a housing (1), a motor (2) arranged therein and having a motor shaft (3), and a tool shaft (4) which is received rotatably in the housing (1) and which is drivable by the motor shaft (3) via a transmission (6), wherein the transmission (6) comprises at least two mutually engaging toothed wheels (7,8), a first toothed wheel (7) of which is coupled to the motor shaft, wherein the first toothed wheel is situated, as seen in longitudinal direction of the motor shaft, in line with the outer end of the motor shaft, wherein the first toothed wheel is mounted in the housing (1).
Description
Technical field
The present invention relates to a kind of handheld tool, especially a kind of battery-driven annular saw, it comprises a shell, be arranged in this shell and have a motor and a tool spindle that is installed in the motor drive shaft in the motor shell, this tool spindle is rotatably installed in this shell and by a transmission device and is driven by this motor drive shaft, wherein this transmission device comprises at least two pitch wheels, wherein one first gear links to each other with this motor drive shaft, and the axis of this first gear and the axis of this motor drive shaft are in line.
Background technology
In common handheld tool, motor is installed in the enclosure.In addition, motor drive shaft at two ends by placing the bearing in the shell to be mounted.Motor drive shaft is outstanding in an outer end, so that first gear of transmission device can be mounted thereto.This first gear drive, one second gear.Under the situation of single-stage driving, second gear is installed on the tool spindle, and with driven tool, perhaps under the situation of twin-stage transmission, it drives a follow-up gear.For allowing to obtain big moment, heavy motors or bidentate wheel transmission device in known handheld tool, have been used.These solutions are relatively expensive.
In another known handheld instrument, first gear is embodied as a band gear ring sleeve, and this sleeve is fitted on the motor drive shaft.The axis of this first gear and the axis of this motor drive shaft are in line.Because needn't consider the diameter of motor drive shaft, first gear can adopt relatively little diameter.Therefore, giving under the situation of stable drive ratio, can obtain to have second gear of relative minor diameter.Therefore the external diameter of this handheld tool can be reduced.The shortcoming of this structure is that the axial distance of bearing of described gear ring and motor drive shaft is relatively large, thereby motor drive shaft will bear big relatively bend loading.
Summary of the invention
The object of the present invention is to provide a kind of handheld tool, no matter power drives or battery-operated wherein, its motor and transmission device all are modified.The handheld tool that provides a kind of manufacturing cost relatively low is provided further purpose of the present invention.
For this reason, the present invention proposes a kind of handheld tool, it includes shell, be installed in the motor in this shell, and tool spindle, this motor comprises motor shell and is installed in motor drive shaft in this motor shell by bearing, this tool spindle is rotatably installed in this shell and by a transmission device and is driven by described motor drive shaft, wherein this transmission device comprises at least two pitch wheels, wherein one first gear links to each other with described motor drive shaft, the axis of described first gear and the axis of described motor drive shaft are in line, wherein, described first gear is installed in the described shell, and described motor places in the described shell by a Ka Dengshi suspension.The motor drive shaft that links to each other with tool spindle is installed on three positions at this moment, i.e. the position of two of motor drive shaft outer ends and this tool spindle.In known handheld tool, be positioned at the load load of transmission device no better than on the bearing of motor drive shaft at the most close first gear place.Under situation according to the present invention, the major part of load is absorbed by the bearing of motor drive shaft, and all the other more the load of fraction more be evenly distributed on two bearings of motor drive shaft.Load on the bearing and the load on the motor drive shaft are reduced, and have the more motor drive shaft and the bearing of minor diameter thereby can provide.Therefore, production cost is lowered, and the external diameter of handheld tool reduces.
First gear preferably forms by an axle that has gear ring (toothing) on the outer surface of its first outer end, and second outer end of described axle links to each other with described motor drive shaft.This a kind of scheme that is relatively cheap and is easy to realize that has gear ring.
Arrange in the enclosure by a Ka Dengshi suspension or cardan mounting (cardansuspension) according to motor of the present invention.This suspension allows motor to tilt in two orthogonal directions.In this motor configuration, three bearings are straight line to be arranged, wherein they strictly can not be clamped point-blank.The Ka Dengshi suspension of motor provides a kind of scheme that addresses this problem.Whole motor configuration only in the enclosure 2 is located to be held: wherein in the position of motor, and another o'clock is in the position of first gear.This motor can freely swing in the enclosure.
The Ka Dengshi suspension of this motor is preferably placed on the position of motor axis of inertia, minimizes with the synthesis oscillation effect (imbalance) with member.
This Ka Dengshi suspension can have different embodiment.First example is a ball-and-socket joint.Second example is a rib, and this rib extends and have the tip of an aligning motor in cross section along the periphery of motor.
Preferably, further provide the locking device that meshes with motor, center on its longitudinal axis rotation to prevent motor.
First gear that is the form of the axle that has gear ring links to each other with motor drive shaft on its second outer end.This second outer end or be clamped on the motor drive shaft by a closing sleeve perhaps is provided with a hole, and wherein this motor drive shaft is clamped and installed in this hole.
Description of drawings
Present invention will be further described below with reference to accompanying drawing.In the accompanying drawings:
Fig. 1 represents the schematic diagram of annular saw well known in the prior art;
Fig. 2 represents the schematic diagram according to the annular saw of first embodiment of the invention;
Fig. 3 represents the schematic diagram according to the annular saw of second embodiment of the invention.
The specific embodiment
Fig. 1 represents a known annular saw.This annular saw comprises that motor 2 and that a shell 1, wherein is equipped with motor drive shaft 3 is rotatably installed in this shell and is equipped with the tool spindle 4 of a circular saw blade 5 on it.Tool spindle 4 can be driven by motor drive shaft 3 by transmission device 6.This transmission device comprises at least two pitch wheels 7,8, and wherein first gear 7 is fitted on the outer end of motor drive shaft 3.This motor drive shaft further is assembled in the bearing 9,10 near two outer end, thereby the motor 2 that has motor drive shaft 3 is in the enclosure clamped by these bearings 9,10.
Fig. 2 and Fig. 3 represent two embodiment according to annular saw of the present invention.Below will illustrate according to the difference between the known annular saw among these annular saws of the present invention and Fig. 1.At first, first gear according to the present invention forms by an axle 11 that has gear ring on the outer surface of its first outer end.This gear ring is schematically illustrated with thick black line in Fig. 2 and Fig. 3.According to the embodiment among Fig. 2, this axle is provided with a hole 12, and wherein the outer end of motor drive shaft 3 is clamped and installed in this hole 12.Yet,, will be clamped on the outer end of motor drive shaft 3 away from axle 11 the end of gear ring by a closing sleeve 13 according to second embodiment of Fig. 3.Be with the further difference of Fig. 1, except the bearing 9,10 that is used for motor drive shaft, also be provided with one the 3rd bearing 14 as the crow flies.Axle 11 is installed in the enclosure by this bearing 14.By bearing 9,10 motor drive shaft is installed in the motor shell of motor 2. Bearing 9,10 is independent of on the motor shell that shell 1 is installed in motor 2 at this.
Be that with the last difference of known annular saw among Fig. 1 motor 2 is suspended in the shell 1, thereby motor 2 can be around at least two orthogonal axis swings, but on direction of rotation, be limited swing perpendicular to the 3rd axis of these two axis.The 3rd axis is the longitudinal axis of motor 2.This Ka Dengshi suspension of motor 2 or clamp (clamping action) are preferably placed on the position of axis of inertia of the motor 2 in the shell.Can obtain this clamp by the rib 15 that extends along motor periphery and in cross section, have a tip of aiming at or contacting with motor.By allowing motor with respect to rib 15 displacement vertically or as the structure of the strain of rib 15, this clamp allows motor 2 swings.The locking device that does not illustrate in the accompanying drawings further is provided, and it locks motor 2, to prevent to center on the rotation on its longitudinal axis direction.Clamped or clamp is in the enclosure on 2: 14,15 for this structure that includes motor 2, motor drive shaft 3 and axle 11.This two point form clamp allows motor and the swing of drive mechanism Min. ground.
From this motor drive shaft 3 vertically, first gear that is axle 11 forms according to the present invention is positioned at before the outer end of motor drive shaft 3.The diameter of the gear ring on the axle 11 therefore can be than littler (with Fig. 2 and Fig. 3 and Fig. 1 comparison) in the known annular saw.By having the more gear ring of the axle 11 of minor diameter, make the gear ring on second gear 8 can have littler diameter, can obtain the bigger degree of depth that cuts giving under the situation of stable drive ratio like this, perhaps opposite, under the given situation that cuts the degree of depth, can obtain bigger gearratio.
The present invention is not limited to the annular saw shown in the accompanying drawing.
Claims (8)
1. handheld tool, it includes shell, be installed in the motor in this shell, and tool spindle, this motor comprises motor shell and is installed in motor drive shaft in this motor shell by bearing, this tool spindle is rotatably installed in this shell and by a transmission device and is driven by described motor drive shaft, wherein this transmission device comprises at least two pitch wheels, wherein one first gear links to each other with described motor drive shaft, the axis of described first gear and the axis of described motor drive shaft are in line, it is characterized in that, described first gear is installed in the described shell, and described motor places in the described shell by a Ka Dengshi suspension.
2. handheld tool as claimed in claim 1 is characterized in that, described first gear forms by an axle that has gear ring on the outer surface of its first outer end, and second outer end of described axle links to each other with described motor drive shaft.
3. handheld tool as claimed in claim 1 is characterized in that, described Ka Dengshi suspension is positioned on the position of axis of inertia of described motor.
4. as claim 1 or 3 described handheld tools, it is characterized in that described Ka Dengshi suspension comprises a ball-and-socket joint.
5. as claim 1 or 3 described handheld tools, it is characterized in that described Ka Dengshi suspension comprises a rib, described rib extends and has the tip of aligning motor in cross section along the motor periphery.
6. handheld tool as claimed in claim 1 or 2 is characterized in that, the locking device that meshes with described motor is provided, to prevent that this motor is around its longitudinal axis rotation.
7. handheld tool as claimed in claim 2 is characterized in that, second outer end of described axle is clamped on the described motor drive shaft by a closing sleeve.
8. handheld tool as claimed in claim 2 is characterized in that, second outer end of described axle comprises a hole, and wherein said motor drive shaft is clamped and installed in this hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1020056 | 2002-02-25 | ||
| NL1020056A NL1020056C2 (en) | 2002-02-25 | 2002-02-25 | Motor and transmission construction for a hand tool. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1665631A CN1665631A (en) | 2005-09-07 |
| CN100400211C true CN100400211C (en) | 2008-07-09 |
Family
ID=27752085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038045788A Expired - Fee Related CN100400211C (en) | 2002-02-25 | 2003-02-19 | Motor and transmission construction for a hand-held tool |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1480775A1 (en) |
| CN (1) | CN100400211C (en) |
| AU (1) | AU2003211332A1 (en) |
| NL (1) | NL1020056C2 (en) |
| WO (1) | WO2003070410A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021259983A1 (en) * | 2020-06-25 | 2021-12-30 | Festool Gmbh | Circular saw with a blade mount for circular saw blades and method of attaching a circular saw blade to a circular saw |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3303366A (en) * | 1964-05-20 | 1967-02-07 | Black & Decker Mfg Co | Bearing mount for armature shaft subassembly having a pinion cutter runout |
| US4694721A (en) * | 1986-04-08 | 1987-09-22 | Delta International Machinery Corp. | Motor pack for circular saw |
| US4856394A (en) * | 1988-04-14 | 1989-08-15 | Porter-Cable Corporation | Portable circular saw |
| US6026909A (en) * | 1998-10-30 | 2000-02-22 | Techtronic Industries Co., Ltd. | Power tool |
| DE19907181A1 (en) * | 1999-02-19 | 2000-09-14 | Neugart Gmbh & Co | Connection between slotted hollow shaft/sleeve and shaft fitted into it has one or more slots, with at least one slot closed at both ends |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3848680A (en) * | 1973-12-26 | 1974-11-19 | Skil Corp | Impact clutch mechanism |
| DE3502449C3 (en) * | 1984-02-08 | 2002-02-28 | Bosch Gmbh Robert | Electropneumatic hammer drill and / or impact hammer with battery-powered drive motor |
| DE3837844A1 (en) * | 1988-11-08 | 1990-05-10 | Licentia Gmbh | Arrangement of the stator in the motor housing of electric tools |
| SE515468C2 (en) * | 1999-12-23 | 2001-08-13 | Volvo Lastvagnar Ab | Gear wheels intended to be connected to a shaft by means of a press fit and a shaft bearing a press-fit gear |
-
2002
- 2002-02-25 NL NL1020056A patent/NL1020056C2/en not_active IP Right Cessation
-
2003
- 2003-02-19 EP EP03705520A patent/EP1480775A1/en not_active Withdrawn
- 2003-02-19 AU AU2003211332A patent/AU2003211332A1/en not_active Abandoned
- 2003-02-19 CN CNB038045788A patent/CN100400211C/en not_active Expired - Fee Related
- 2003-02-19 WO PCT/NL2003/000126 patent/WO2003070410A1/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3303366A (en) * | 1964-05-20 | 1967-02-07 | Black & Decker Mfg Co | Bearing mount for armature shaft subassembly having a pinion cutter runout |
| US4694721A (en) * | 1986-04-08 | 1987-09-22 | Delta International Machinery Corp. | Motor pack for circular saw |
| US4856394A (en) * | 1988-04-14 | 1989-08-15 | Porter-Cable Corporation | Portable circular saw |
| US6026909A (en) * | 1998-10-30 | 2000-02-22 | Techtronic Industries Co., Ltd. | Power tool |
| DE19907181A1 (en) * | 1999-02-19 | 2000-09-14 | Neugart Gmbh & Co | Connection between slotted hollow shaft/sleeve and shaft fitted into it has one or more slots, with at least one slot closed at both ends |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003211332A1 (en) | 2003-09-09 |
| EP1480775A1 (en) | 2004-12-01 |
| NL1020056C2 (en) | 2003-08-27 |
| CN1665631A (en) | 2005-09-07 |
| WO2003070410A1 (en) | 2003-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CI01 | Correction of invention patent gazette |
Correction item: Applicant Correct: Robert Bosch Ltd. False: Skil Europ BV Number: 36 Volume: 21 |
|
| CI02 | Correction of invention patent application |
Correction item: Applicant Correct: Robert Bosch Ltd. False: Skil Europ BV Number: 36 Page: The title page Volume: 21 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SKIL EUROP BV TO: BOSCH GMBH ROBERT |
|
| ERR | Gazette correction |
Free format text: CORRECT: APPLICANT; FROM: SKIL EUROP BV TO: BOSCH GMBH ROBERT |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080709 Termination date: 20100219 |