WO2005093276A1 - Bi-directional friction clutch assembly for electric motors to prevent backdrive - Google Patents
Bi-directional friction clutch assembly for electric motors to prevent backdrive Download PDFInfo
- Publication number
- WO2005093276A1 WO2005093276A1 PCT/US2005/003808 US2005003808W WO2005093276A1 WO 2005093276 A1 WO2005093276 A1 WO 2005093276A1 US 2005003808 W US2005003808 W US 2005003808W WO 2005093276 A1 WO2005093276 A1 WO 2005093276A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cam
- clutch
- assembly
- worm shaft
- coupler
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 7
- 241000381592 Senegalia polyacantha Species 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
- F16D41/10—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D67/00—Combinations of couplings and brakes; Combinations of clutches and brakes
- F16D67/02—Clutch-brake combinations
Definitions
- the invention relates to a bi-directional clutch assembly for electric motors that becomes operational (engages) whenever an output shaft side becomes the driving element.
- An object of the invention is to fulfill the need referred to above.
- this objective is achieved by providing a clutch assembly for a motor having an armature shaft and a worm shaft having a worm constructed and arranged to engage a gear.
- the clutch assembly includes a clutch housing including a race surface; a cam coupled to the worm shaft; follower structure operatively associated with the cam; a clutch plate, and a clutch coupler associated with the clutch plate, the cam, and the follower structure.
- the coupler is coupled to the armature shaft for rotation therewith, such that rotation of the coupler rotates the clutch plate, the cam and follower structure, and thus the worm shaft.
- the cam is constructed and arranged to causes the follower structure to contact and exert pressure on the race surface thereby preventing rotation of the worm shaft.
- a method is provided to control back drive in a motor.
- the motor includes an armature shaft and a worm shaft having a worm constructed and arranged to engage a gear.
- the method provides a clutch assembly having a clutch housing including a race surface; a cam coupled to the worm shaft; follower structure associated with the cam; a clutch plate; and a clutch coupler associated with the clutch plate, the cam, and the follower structure.
- the coupler is coupled to the armature shaft for rotation therewith, such that rotation of the coupler rotates the clutch plate, the cam and follower structure, and thus the worm shaft.
- the method ensures that 1) during a back drive condition of the motor, when the worm shaft is a driving element and when torque is transmitted to the worm shaft and thus to the cam, the cam causes the follower structure to contact and exert pressure on the race surface thereby preventing rotation of the worm shaft, and 2) during a normal operating condition of the motor, when the armature shaft is a driving element, the follower structure does not contact the race surface, thereby permitting the worm shaft to rotate freely.
- FIG. 1 is a front exploded view of a clutch assembly for a worm and gear arrangement provided in accordance with the principles of the invention.
- FIG. 2 is a rear exploded view of the clutch assembly of FIG. 1.
- FIG. 3 is a sectional view of the clutch assembly of the invention shown in a normal operating condition.
- FIG. 4 is a sectional view of the clutch assembly of the invention shown in a back drive condition.
- FIG. 5 is a perspective view of the clutch assembly of the invention incorporated into a housing of a window lift motor assembly.
- FIG. 6 is a front exploded view of a clutch assembly for a worm and gear arrangement provided in accordance with a second embodiment of the invention.
- FIG. 7 is a rear exploded view of the clutch assembly of FIG. 6.
- FIG. 8 is a sectional view of the clutch assembly of the second embodiment of the invention shown in a normal operating condition.
- FIG. 9 is a sectional view of the clutch assembly of the second embodiment of the invention shown in a back drive condition.
- a clutch assembly is shown, generally indicated at 10, in FIG. 1 in accordance with the principles of the present invention.
- the clutch assembly 10 includes a clutch housing 12 having an inner race surface 34, a support plate 14, a cam 16 having a keyhole 23 so as to be coupled to a worm shaft 18 at end 20, cam followers 22 associated with the cam 16, a coupler 24 having a keyhole 26 connected with an end 28 of a shaft 30 of a motor armature (not shown), and a retainer 32 for retaining the support plate, cam and followers and coupler within the housing 12.
- the clutch assembly 10 can be mounted to a housing 36 of a motor, such as a conventional windowlift motor for a vehicle, so that the worm shaft 18 meshes with the conventional drive gear of the motor.
- the support plate 14 can also be considered a clutch plate and includes a central opening 19 to permit the shaft 18 to pass there- through.
- the support plate 14 includes two pins 38 extending therefrom and each follower 22 includes an off-center bore 40 there through. Each pin 38 is received in an associated bore 40 to define an eccentric follower.
- the support plate 14 includes engagement surfaces 42 constructed and arranged to engage a surfaces 29 of the coupler as explained below.
- the coupler 24 includes engagement members 25 disposed in spaced relation such that the cam 16 is there-between (FIG. 3).
- Each engagement member 25 is of generally pentagon shape except that bottom surface 27 is a curved surface.
- each engagement member 25 has a pair of side surfaces 29 and a pair of top surfaces that meet at an apex 48, the function of which will be apparent below.
- the support plate 14 is "floating" with relation to all other components and will freely spin when the motor armature is the driving element (via shaft 30).
- the coupler 24 engages the support plate 14 and cam 16 simultaneously, maintaining the alignment of the followers 22 with respect to the cam 16.
- the clutch assembly 10 can be used in any application involving the use of worm gearing coupled to electric motors. This assembly 10 was configured with automotive windowlift applications in mind.
- FIGs. 6-9 show a clutch assembly, generally indicated at 100, in accordance with a second embodiment of the invention.
- the clutch assembly 100 includes a clutch housing 112, a clutch plate 114, a cam 116 having a keyhole 117 so as to be coupled to an end of a worm shaft (not shown), and a clutch coupler 118 having a keyhole 120 for connection with an end of a shaft (not shown) of a motor armature (not shown).
- the coupler 118 also includes engagement members 125 extending there from and of the type described above with regard to the first embodiment.
- the clutch assembly 100 can be mounted to a housing of a motor, such as a conventional windowlift motor for a vehicle, so that the worm shaft meshes with the conventional drive gear (not shown) of the motor.
- a motor such as a conventional windowlift motor for a vehicle
- the clutch plate 114 includes two followers 122 in opposing relation and extending from a body 124 of the clutch plate 114.
- the followers 122 are preferably molded as an integral part of the clutch plate.
- each follower 122 is connected to the clutch plate 114 by a pair of flexible bridging members 136.
- each follower 122 can be connected to the clutch plate 114 by single bridging member that defines a living hinge.
- each engagement member 125 of the coupler 118 contacts an associated engagement surface 142 of the clutch plate 114.
- a top surface 131 of each engagement member 125 contacts the cam 116.
- Retaining structure 134 in the form of resilient clips, is integral with the housing 112 to retain the components in the housing 112. In particular, once assembled, the clips 134 engage surface 135 of the coupler (FIG. 6).
- an electric motor employing the clutch assembly 100 can be configured with a smaller size and with less cost and can be used in the same original application.
- the clutch assembly 100 can be used in any application involving the use of worm gearing coupled to electric motors.
- the assembly 100 was configured with automotive windowlift applications in mind.
- the desired effect of the use of this clutch assembly 10, 100 is that an increase in the gearing efficiency allows for a smaller motor design, with the desired reduction in system costs.
- the clutch assembly 10, 100 utilizes the principle of an overrunning clutch, with the added feature that it becomes operational on both angular directions, as long as the worm and gear become the driving elements.
- the clutch assembly is configured to be a self-contained unit for ease of assembly in the motor, and it incorporates all the characteristic of a sleeve bearing so it can replace an existing one.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05713012A EP1718882A1 (en) | 2004-02-26 | 2005-02-04 | Bi-directional friction clutch assembly for electric motors to prevent backdrive |
JP2007500852A JP2007525628A (en) | 2004-02-26 | 2005-02-04 | Two-way friction clutch assembly for electric motors |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54783304P | 2004-02-26 | 2004-02-26 | |
US60/547,833 | 2004-02-26 | ||
US10/961,013 | 2004-10-08 | ||
US10/961,013 US7163097B2 (en) | 2004-02-26 | 2004-10-08 | Bi-directional friction clutch assembly for electric motors to prevent backdrive |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005093276A1 true WO2005093276A1 (en) | 2005-10-06 |
Family
ID=34960889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/003808 WO2005093276A1 (en) | 2004-02-26 | 2005-02-04 | Bi-directional friction clutch assembly for electric motors to prevent backdrive |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1718882A1 (en) |
JP (1) | JP2007525628A (en) |
KR (1) | KR100830416B1 (en) |
CN (1) | CN1926352A (en) |
WO (1) | WO2005093276A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1691100A1 (en) * | 2005-02-10 | 2006-08-16 | Siemens VDO Automotive Corporation | Bi-directional friction clutch or brake asembly for transmissions |
FR2916584A1 (en) * | 2007-05-22 | 2008-11-28 | Buhler Motor Gmbh Ges Mit Besc | DRIVE SYSTEM COMPRISING AN ELECTRIC MOTOR, A HOUSING AND A SELECTIVE BRAKE ACCORDING TO THE SENSE |
CN101063468B (en) * | 2006-04-28 | 2011-08-31 | 王明根 | Couplings |
US9455607B2 (en) | 2009-06-23 | 2016-09-27 | Asmo Co., Ltd. | Clutch and motor |
CN108302136A (en) * | 2017-01-11 | 2018-07-20 | 佳能株式会社 | Clutch, drive transmission device and imaging device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5941286B2 (en) * | 2012-01-17 | 2016-06-29 | 株式会社ミツバ | Reverse rotation prevention mechanism |
JP2016223621A (en) * | 2015-05-27 | 2016-12-28 | Ntn株式会社 | Reverse input cutoff clutch |
WO2016190206A1 (en) * | 2015-05-27 | 2016-12-01 | Ntn株式会社 | Reverse input blocking clutch |
KR101869296B1 (en) * | 2016-11-08 | 2018-06-21 | 계양전기 주식회사 | Brake structure of desk lift |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5582279A (en) * | 1995-07-12 | 1996-12-10 | Itt Automotive Electrical Systems, Inc. | Acceleration reaction clutch with override capability |
EP1101967A1 (en) * | 1998-08-03 | 2001-05-23 | Asmo Co. Ltd. | Clutch and drive device having the clutch |
EP1101968A1 (en) * | 1998-08-03 | 2001-05-23 | Asmo Co. Ltd. | Drive device having motor and speed reduction mechanism |
WO2001053640A1 (en) * | 2000-01-19 | 2001-07-26 | Stoneridge Control Devices, Inc. | Electro-mechanical actuator |
EP1122390A2 (en) * | 2000-02-02 | 2001-08-08 | Asmo Co., Ltd. | Clutch and motor including such clutch |
US6288464B1 (en) * | 1999-07-13 | 2001-09-11 | Asmo Co., Ltd. | Motor having worm gear mechanism |
-
2005
- 2005-02-04 JP JP2007500852A patent/JP2007525628A/en not_active Abandoned
- 2005-02-04 WO PCT/US2005/003808 patent/WO2005093276A1/en active Application Filing
- 2005-02-04 EP EP05713012A patent/EP1718882A1/en not_active Withdrawn
- 2005-02-04 KR KR1020067019630A patent/KR100830416B1/en not_active IP Right Cessation
- 2005-02-04 CN CNA2005800063245A patent/CN1926352A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5582279A (en) * | 1995-07-12 | 1996-12-10 | Itt Automotive Electrical Systems, Inc. | Acceleration reaction clutch with override capability |
EP1101967A1 (en) * | 1998-08-03 | 2001-05-23 | Asmo Co. Ltd. | Clutch and drive device having the clutch |
EP1101968A1 (en) * | 1998-08-03 | 2001-05-23 | Asmo Co. Ltd. | Drive device having motor and speed reduction mechanism |
US6288464B1 (en) * | 1999-07-13 | 2001-09-11 | Asmo Co., Ltd. | Motor having worm gear mechanism |
WO2001053640A1 (en) * | 2000-01-19 | 2001-07-26 | Stoneridge Control Devices, Inc. | Electro-mechanical actuator |
EP1122390A2 (en) * | 2000-02-02 | 2001-08-08 | Asmo Co., Ltd. | Clutch and motor including such clutch |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1691100A1 (en) * | 2005-02-10 | 2006-08-16 | Siemens VDO Automotive Corporation | Bi-directional friction clutch or brake asembly for transmissions |
CN101063468B (en) * | 2006-04-28 | 2011-08-31 | 王明根 | Couplings |
FR2916584A1 (en) * | 2007-05-22 | 2008-11-28 | Buhler Motor Gmbh Ges Mit Besc | DRIVE SYSTEM COMPRISING AN ELECTRIC MOTOR, A HOUSING AND A SELECTIVE BRAKE ACCORDING TO THE SENSE |
US9455607B2 (en) | 2009-06-23 | 2016-09-27 | Asmo Co., Ltd. | Clutch and motor |
CN108302136A (en) * | 2017-01-11 | 2018-07-20 | 佳能株式会社 | Clutch, drive transmission device and imaging device |
EP3354924A1 (en) * | 2017-01-11 | 2018-08-01 | Canon Kabushiki Kaisha | Clutch, drive transmission device and image forming apparatus |
US10704610B2 (en) | 2017-01-11 | 2020-07-07 | Canon Kabushiki Kaisha | Clutch, drive transmission device and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP2007525628A (en) | 2007-09-06 |
EP1718882A1 (en) | 2006-11-08 |
KR100830416B1 (en) | 2008-05-20 |
CN1926352A (en) | 2007-03-07 |
KR20060125911A (en) | 2006-12-06 |
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