WO2002057630A1 - Air compressor unit - Google Patents

Air compressor unit Download PDF

Info

Publication number
WO2002057630A1
WO2002057630A1 PCT/DK2002/000033 DK0200033W WO02057630A1 WO 2002057630 A1 WO2002057630 A1 WO 2002057630A1 DK 0200033 W DK0200033 W DK 0200033W WO 02057630 A1 WO02057630 A1 WO 02057630A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
cylinder
crankcase
compressor
crankshaft
Prior art date
Application number
PCT/DK2002/000033
Other languages
French (fr)
Inventor
Peter Egelund
Thomas Laetgaard
Original Assignee
Active Tools A/S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Active Tools A/S filed Critical Active Tools A/S
Publication of WO2002057630A1 publication Critical patent/WO2002057630A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/14—Provisions for readily assembling or disassembling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S5/00—Servicing, maintaining, repairing, or refitting of vehicles
    • B60S5/04—Supplying air for tyre inflation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/06—Mobile combinations

Definitions

  • the present invention concerns an air compressor unit for inflating vehicle tyres, including a 12 N DC motor driving a reciprocating compressor through a crankshaft and a connecting rod arrangement and a gear with a gear ratio with crankshaft rpm relative to drive shaft rpm in the range 3:10 to 1:10 inserted between the drive shaft of the motor and the crankshaft.
  • Such a compressor unit is disclosed in GB A 2 157 775, providing a low-cost unit with only one piston and a gear with only one step.
  • crankcase, gear housing and flange for mounting the motor in the unit are cast in one piece, that the compressor cylinder has laterally projecting lugs with screw holes and is releasably fastened to the crankcase with screw connections, and that the cylinder is provided with a detachable valve arrangement at the end opposite the crankcase.
  • the flange for mounting the motor covers the end face around the drive shaft and has an annular collar enclosing the abutting end of the motor, and that the collar is provided with mounting holes for fastening a jacket protecting the motor.
  • FIG. 1 shows a section through a first embodiment of a compressor unit according to the invention where the motor is provided with a protective jacket
  • Fig. 2 shows a second embodiment of a compressor unit according to the invention as seen from the side without protective jacket, but mounted with a pressur- ised air hose, and
  • Fig. 3 shows the unit on Fig. 2 but seen from the right and provided with protective jacket.
  • an embodiment of a compressor unit according to the invention is structured around a housing 1 comprising a collar 5 which is provided with a motor flange 2, a gearbox 3 or similar means and a crankcase 4.
  • the collar 5 encloses one end of a 12 volt DC motor 6.
  • the drive shaft 7 of the motor is provided with a small gear wheel 8 driving a larger gear wheel 9 on the crankshaft 10.
  • the shaft 10 is suspended in bearings 11 and 12 in gearbox 3 and crankcase 4.
  • the larger gear wheel 9 may be provided with wings 13 for cooling the inner of the crankcase 4.
  • the shaft 10 is provided with a crank and a connecting rod 14 pivotably connected thereto and having a piston 15 to be reciprocated in a cylinder 16.
  • the shaft 10 is furthermore provided with a balance weight 17 opposite the crank for balancing the rotational movement.
  • the end of the cylinder 16 opposite the crankcase 4 is provided with a valve arrange- ment 19 over the air duct 18 of the cylinder, and with air intake with check valve, pressure gauge 26, and air discharge outlet 20.
  • the motor 6 is here enclosed by a jacket 21 fitting tightly to the collar 5 of the motor flange 2 and mounted via screw holes on laterally projecting lugs 30 as shown on Fig. 3.
  • the jacket 21 is furthermore provided with holes 22 for passing through not shown wiring for the terminals 23 of the motor.
  • the function of the jacket 21 is to provide a selected IP sealing relative to the environment in which the motor 6 is to operate.
  • the motor 6 is fastened to the flange 2 by not shown screws, and the jacket 21 is fastened to the collar 5 with not shown screws through the projections 30.
  • the gear ratio measured as the tooth number of the small wheel 8 compared with the tooth number of the large wheel 9 is here in the magnitude 1 :5 but other ratios may of course be chosen according to the need.
  • the cylinder 16 is detachable as it is fastened to the crankcase 4 with not shown screws through not shows laterally projecting lugs which are shaped like the lugs 30 on the collar 5. Thereby the displacement and other parameters in connection with the pressurised air supply may be changed.
  • the wheel 9, the connecting rod 14 and the cylinder 15 together with the valve arrangement 19 are made of plastic, whereas most of the other constituent parts are made of metal, preferably steel, aluminium or zinc alloys.
  • Fig. 2 and 3 many components are identical with those on Fig. 1.
  • the motor 6 on Fig. 2 is shown without any protective jacket.
  • a valve arrangement with a slightly different external shape is used at the top of the cylinder 16.
  • a pressure gauge 26 there is provided a pressure gauge 26, a pressure switch 25, and a rubber hose 27 connected to the outlet 20.
  • a button operated valve 28 and a car tyre connector 29 On the hose 27 there is a button operated valve 28 and a car tyre connector 29.
  • valve arrangement 19 constitutes a cylinder head projecting beyond the side of the cylinder, and where long screws are applied through holes in the cylinder head at the outer side of the cylinder and which are screwed into the crankcase 4 for holding the cylinder fast between crankcase and cylinder head.
  • the compressor unit is designed be mass-produced of standard component parts.
  • the compressor unit according to the invention may be applied by installation in cars where the unit is associated with a device for injecting latex mass, where the pressurised air is used for pressing the latex mass into a punctured tyre on the car after which the compressor may provide the tyre with pressurised air until inflated completely.
  • Another application may be in a separate unit provided in a box or in another easily handled means and may have its own energy supply in the shape of a battery.

Abstract

A compressor unit for fixed installation in cars or for use in a separate unit for inflating and possible repairing punctured tyres comprises a conventional piston compressor (16) with crankshaft (10) driven by a 12V DC motor (6). Crankcase (4), gear housing (3) and flange (2) for mounting the motor (6) in the unit are cast in one piece. The compressor cylinder has laterally projecting lugs with screw holes and is releasably fastened to the crankcase with screw connections. The cylinder (16) is provided with a detachable valve arrangement (19) at the end opposite the crankcase. Thereby it is possible to exchange the cylinder (16) for use in different applications as stroke, cylinder diameter and dead volume in the top of the compressor cylinder may be varied according to choice for adapting piston displacement, discharge pressure and volume flow.

Description

Air Compressor Unit Background of the Invention
The present invention concerns an air compressor unit for inflating vehicle tyres, including a 12 N DC motor driving a reciprocating compressor through a crankshaft and a connecting rod arrangement and a gear with a gear ratio with crankshaft rpm relative to drive shaft rpm in the range 3:10 to 1:10 inserted between the drive shaft of the motor and the crankshaft.
Such a compressor unit is disclosed in GB A 2 157 775, providing a low-cost unit with only one piston and a gear with only one step.
Summary of the Invention
The peculiar feature according to the invention is that crankcase, gear housing and flange for mounting the motor in the unit are cast in one piece, that the compressor cylinder has laterally projecting lugs with screw holes and is releasably fastened to the crankcase with screw connections, and that the cylinder is provided with a detachable valve arrangement at the end opposite the crankcase.
With these features is achieved a simple and cheap embodiment of a compressor unit for inflating tyres, and at the same time it is possible to exchange the cylinder for use in different applications since stroke, cylinder diameter and dead volume in the top of the compressor cylinder may be varied according to choice, thereby adapting piston displacement, discharge pressure and volume flow.
In order to enable use of different protective jackets on the motor for different IP protection degrees, it is preferred that the flange for mounting the motor covers the end face around the drive shaft and has an annular collar enclosing the abutting end of the motor, and that the collar is provided with mounting holes for fastening a jacket protecting the motor.
The Drawing
Preferred embodiments of the invention will now be described in more detail with reference to the drawing, in which: Fig. 1 shows a section through a first embodiment of a compressor unit according to the invention where the motor is provided with a protective jacket,
Fig. 2 shows a second embodiment of a compressor unit according to the invention as seen from the side without protective jacket, but mounted with a pressur- ised air hose, and
Fig. 3 shows the unit on Fig. 2 but seen from the right and provided with protective jacket.
Description of Embodiments As shown in the sectional drawing on Fig. 1, an embodiment of a compressor unit according to the invention is structured around a housing 1 comprising a collar 5 which is provided with a motor flange 2, a gearbox 3 or similar means and a crankcase 4. The collar 5 encloses one end of a 12 volt DC motor 6. The drive shaft 7 of the motor is provided with a small gear wheel 8 driving a larger gear wheel 9 on the crankshaft 10. The shaft 10 is suspended in bearings 11 and 12 in gearbox 3 and crankcase 4.
The larger gear wheel 9 may be provided with wings 13 for cooling the inner of the crankcase 4. In a way to the skilled in the art, the shaft 10 is provided with a crank and a connecting rod 14 pivotably connected thereto and having a piston 15 to be reciprocated in a cylinder 16. The shaft 10 is furthermore provided with a balance weight 17 opposite the crank for balancing the rotational movement.
The end of the cylinder 16 opposite the crankcase 4 is provided with a valve arrange- ment 19 over the air duct 18 of the cylinder, and with air intake with check valve, pressure gauge 26, and air discharge outlet 20.
The motor 6 is here enclosed by a jacket 21 fitting tightly to the collar 5 of the motor flange 2 and mounted via screw holes on laterally projecting lugs 30 as shown on Fig. 3. The jacket 21 is furthermore provided with holes 22 for passing through not shown wiring for the terminals 23 of the motor. The function of the jacket 21 is to provide a selected IP sealing relative to the environment in which the motor 6 is to operate. The motor 6 is fastened to the flange 2 by not shown screws, and the jacket 21 is fastened to the collar 5 with not shown screws through the projections 30.
The gear ratio measured as the tooth number of the small wheel 8 compared with the tooth number of the large wheel 9 is here in the magnitude 1 :5 but other ratios may of course be chosen according to the need.
The cylinder 16 is detachable as it is fastened to the crankcase 4 with not shown screws through not shows laterally projecting lugs which are shaped like the lugs 30 on the collar 5. Thereby the displacement and other parameters in connection with the pressurised air supply may be changed.
In the embodiment shown, the wheel 9, the connecting rod 14 and the cylinder 15 together with the valve arrangement 19 are made of plastic, whereas most of the other constituent parts are made of metal, preferably steel, aluminium or zinc alloys.
In another embodiment as shown on Fig. 2 and 3, many components are identical with those on Fig. 1. The motor 6 on Fig. 2, however, is shown without any protective jacket. Furthermore, a valve arrangement with a slightly different external shape is used at the top of the cylinder 16. Thus there is provided a pressure gauge 26, a pressure switch 25, and a rubber hose 27 connected to the outlet 20. On the hose 27 there is a button operated valve 28 and a car tyre connector 29.
Other embodiments of the invention are possible. Another form of cylinder 16 may thus be used, shaped almost tubular, where the valve arrangement 19 constitutes a cylinder head projecting beyond the side of the cylinder, and where long screws are applied through holes in the cylinder head at the outer side of the cylinder and which are screwed into the crankcase 4 for holding the cylinder fast between crankcase and cylinder head.
In both embodiments, the compressor unit is designed be mass-produced of standard component parts. The compressor unit according to the invention may be applied by installation in cars where the unit is associated with a device for injecting latex mass, where the pressurised air is used for pressing the latex mass into a punctured tyre on the car after which the compressor may provide the tyre with pressurised air until inflated completely. Another application may be in a separate unit provided in a box or in another easily handled means and may have its own energy supply in the shape of a battery.

Claims

1. An air compressor unit for inflating vehicle tyres, including a 12 V DC motor (6) driving a reciprocating compressor through a crankshaft (10) and a connecting rod arrangement (14), where a gear (8,9) with a gear ratio of crankshaft rpm relative to drive shaft rpm in the range 3:10 to 1:10 is inserted between the drive shaft (7) of the motor (6) and the crankshaft (10), characterised in that crankcase (4), gear housing (3) and flange (2) for mounting the motor (6) in the unit are cast in one piece, that the compressor cylinder (16) has laterally projecting lugs with screw holes and is releasa- bly fastened to the crankcase (4) with screw connections, and that the cylinder (16) is provided with a detachable valve arrangement (19) at the end opposite the crankcase (4).
2. A compressor unit according to claim 1, characterised in that the flange (2) for mounting the motor (6) covers the end face around the drive shaft (7) and has an annular collar (5) enclosing the abutting end of the motor (6), and that the collar (5) is provided with mounting holes for fastening a jacket (21) protecting the motor (6).
PCT/DK2002/000033 2001-01-17 2002-01-16 Air compressor unit WO2002057630A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200100089 2001-01-17
DKPA200100089 2001-01-17

Publications (1)

Publication Number Publication Date
WO2002057630A1 true WO2002057630A1 (en) 2002-07-25

Family

ID=8160048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2002/000033 WO2002057630A1 (en) 2001-01-17 2002-01-16 Air compressor unit

Country Status (1)

Country Link
WO (1) WO2002057630A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066597A1 (en) * 2004-12-22 2006-06-29 Active Tools A/S A compression chamber unit and a method for forming such unit
US7225959B2 (en) 2001-04-30 2007-06-05 Black & Decker, Inc. Portable, battery-powered air compressor for a pneumatic tool system
US7494035B2 (en) 2001-04-30 2009-02-24 Black & Decker Inc. Pneumatic compressor
WO2010060708A1 (en) * 2008-11-25 2010-06-03 Continental Reifen Deutschland Gmbh Compressor
WO2012051846A1 (en) * 2010-10-19 2012-04-26 宁波沃伟力学工业技术有限公司 Portable air pump
CN102937077A (en) * 2012-11-30 2013-02-20 天津世纪慧芯科技发展有限公司 Air pump
CN103603790A (en) * 2013-11-26 2014-02-26 广西玉柴机器股份有限公司 Clamping device for air compressor subassembly
EP2275679A4 (en) * 2008-04-30 2017-04-26 Sumitomo Rubber Industries, Ltd. Compressor apparatus
CN107100824A (en) * 2017-04-11 2017-08-29 上乘精密科技（苏州）有限公司 A kind of crank axle
FR3055676A1 (en) * 2016-09-02 2018-03-09 Alain Prosper PORTABLE, AUTONOMOUS HIGH PRESSURE INFLATION AND BIKE SUPPORT DEVICE FOR FAMILY, SPORTING AND PROFESSIONAL USE.
EP3418567A1 (en) * 2017-06-21 2018-12-26 Walmsley Developments Pty Ltd Portable pump
EP3670911A1 (en) * 2018-12-17 2020-06-24 Wen-San Chou Positioning structure of motor of air compressor
US10731637B2 (en) 2015-07-27 2020-08-04 Walmsley Developments Pty Ltd Portable pump
CN113983344A (en) * 2021-10-28 2022-01-28 中船黄埔文冲船舶有限公司 High-pressure air is released and is prevented device that splashes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470548A (en) * 1921-06-28 1923-10-09 Spohrer Gregory John Electric motor-driven compressor
US4187058A (en) * 1978-06-22 1980-02-05 Universal Security Instruments, Inc. Portable air compressor
GB2039620A (en) * 1978-12-16 1980-08-13 Hanning Elektro Werke Compressor or displacement pump
GB2277966A (en) * 1993-05-14 1994-11-16 Wen San Jou Air compressor.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470548A (en) * 1921-06-28 1923-10-09 Spohrer Gregory John Electric motor-driven compressor
US4187058A (en) * 1978-06-22 1980-02-05 Universal Security Instruments, Inc. Portable air compressor
GB2039620A (en) * 1978-12-16 1980-08-13 Hanning Elektro Werke Compressor or displacement pump
GB2277966A (en) * 1993-05-14 1994-11-16 Wen San Jou Air compressor.

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7225959B2 (en) 2001-04-30 2007-06-05 Black & Decker, Inc. Portable, battery-powered air compressor for a pneumatic tool system
US7494035B2 (en) 2001-04-30 2009-02-24 Black & Decker Inc. Pneumatic compressor
CN101087952B (en) * 2004-12-22 2010-12-01 冠翔（香港）工业有限公司 A compression chamber unit and a method for forming such unit
US7900550B2 (en) 2004-12-22 2011-03-08 Active Tools International (Hk) Ltd. Compression chamber unit and a method for forming such unit
WO2006066597A1 (en) * 2004-12-22 2006-06-29 Active Tools A/S A compression chamber unit and a method for forming such unit
EP2275679A4 (en) * 2008-04-30 2017-04-26 Sumitomo Rubber Industries, Ltd. Compressor apparatus
WO2010060708A1 (en) * 2008-11-25 2010-06-03 Continental Reifen Deutschland Gmbh Compressor
CN102224343A (en) * 2008-11-25 2011-10-19 大陆轮胎德国有限公司 Compressor
WO2012051846A1 (en) * 2010-10-19 2012-04-26 宁波沃伟力学工业技术有限公司 Portable air pump
CN102937077A (en) * 2012-11-30 2013-02-20 天津世纪慧芯科技发展有限公司 Air pump
CN103603790B (en) * 2013-11-26 2016-06-08 广西玉柴机器股份有限公司 Air compressor machine portion dress clamping device
CN103603790A (en) * 2013-11-26 2014-02-26 广西玉柴机器股份有限公司 Clamping device for air compressor subassembly
US10731637B2 (en) 2015-07-27 2020-08-04 Walmsley Developments Pty Ltd Portable pump
FR3055676A1 (en) * 2016-09-02 2018-03-09 Alain Prosper PORTABLE, AUTONOMOUS HIGH PRESSURE INFLATION AND BIKE SUPPORT DEVICE FOR FAMILY, SPORTING AND PROFESSIONAL USE.
CN107100824A (en) * 2017-04-11 2017-08-29 上乘精密科技（苏州）有限公司 A kind of crank axle
EP3418567A1 (en) * 2017-06-21 2018-12-26 Walmsley Developments Pty Ltd Portable pump
US10837433B2 (en) 2017-06-21 2020-11-17 Walmsley Developments Pty Ltd Portable pump
EP3670911A1 (en) * 2018-12-17 2020-06-24 Wen-San Chou Positioning structure of motor of air compressor
CN113983344A (en) * 2021-10-28 2022-01-28 中船黄埔文冲船舶有限公司 High-pressure air is released and is prevented device that splashes

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