GB2287277A - Vehicle lock actuator transmission - Google Patents
Vehicle lock actuator transmission Download PDFInfo
- Publication number
- GB2287277A GB2287277A GB9404629A GB9404629A GB2287277A GB 2287277 A GB2287277 A GB 2287277A GB 9404629 A GB9404629 A GB 9404629A GB 9404629 A GB9404629 A GB 9404629A GB 2287277 A GB2287277 A GB 2287277A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transmission
- shaft
- intermediate element
- output element
- input shaft
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
- E05B81/25—Actuators mounted separately from the lock and controlling the lock functions through mechanical connections
Abstract
Powered drive transmission for vehicle door lock actuators has an input shaft 12 powered by a motor 10 and having a pinion 14 meshed with an intermediate gear 16. An output element typically a worm screw 22 is linked e.g. by a nut 28 for locking and unlocking movement of the lock and a centrifugal or other automatic clutch acts between the intermediate gear and the output element, transmitting power from the motor but permitting free-wheeling movement of the output element without back drive to the gearing when the linkage is shifted by other means. <IMAGE>
Description
VEHICLE LOCK ACTUATOR TRANSMISSION
This invention relates to power actuated vehicle door locking and unlocking mechanisms, typically forming part of a central door locking system, and more specifically to powered drive transmission for use in said actuators.
The object of the invention is to provide a drive transmission which is of simple and reliable construction and which reduces operative noise and wear and tear of components.
According to the invention there is provided a powered drive transmission for use in a vehicle door lock actuator comprising a rotatably power driven input shaft, a rotatable intermediate element, gearing drivingly connecting the input shaft with the intermediate element, a rotatable output element linked in use to drive a locking device between locked and unlocked positions, and an automatic clutch acting between the intermediate element and the output element to transmit motion from the former to the latter on powered rotation of the input shaft but to permit freewheeling rotation of the output element without drive transmission to the intermediate element and gear train on back driving caused by movement of the actuator by manual or other forces.
Conveniently the input shaft is the shaft of an electric motor powering the actuator and the gearing comprises a pinion fast with said shaft meshing directly with a toothed gear wheel potion of the intermediate element.
Preferably the clutch is a centrifugal clutch having one or more centrifugally displaceable driving elements carried on the intermediate element coacting within a clutch output formation of the output element.
The output element may conveniently include a worm shaft drivingly engaged with a nut for rectilinear motion of the actuator linkage.
An example of the invention is now more particularly described with reference to the accompanying drawings wherein Figure 1 is a diagrammatic siue elevation of a powered actuator drive transmission, and
Figure 2 is a diagrammatic axial section of part of te transmission including a clutch thereof.
The powered actuator transmission includes an electric drive motor 10 having an input shaft 12 with a pinion 14 fast thereon. This is meshed with a larger diameter gear wheel 16 forming an integral part of a rotatable intermediate element 18 also shown in axial section in Figure 2.
Element 18 is located by but freely rotatable on a stub shaft 20 forming an axial extension of a worm shaft 22 so that the latter shaft and element 18 are maintained in coaxial alignment.
A hub portion 24 of element 18 projects axially towards the end of shaft 22 within a bell formation 26 formed integrally on shaft 22.
A nut 28 is in threaded engagement with worm shaft 22 converting rotary motion of the latter to rectilinear motion and vice versa, the nut forming part of a plunger 30 linked to other parts of the actuator and shifting between locked and unlocked positions.
b 24 and bell formation 26 form parts of a centrifugal clutch 32 shown in greater detail in Figure 2. flub portion 24 locates a weighted clutch dog 34 located in a radial bore and urged radially inwardly by a light compression spring 36. When intermediate element 18 is power driven by motor 10 dog 34 is centrifugally urged radially outwards against the spring to engage with a rib, socket or other drive formation or formations in or on the interior face of bell formation 26 so transmitting drive to Borm shaft 22 for movement of plunger 30.
However, when motor iO is inoperative, if there is reverse or back-drive by forced movement of plunger 30 rotating shaft 22 and bell formation 26, e.g. on manual unlocking by use of a door key in the associate lock, only shaft 22 and formation 26 will rotate, drive will not be transmitted trough clutch 32 and the gearing constituted by wheel 16 and pinion 14 remain stationary.
This arrangement substantially reduces resistance to said back-driving, eliminates reverse forces and wear and tear of the gearing and motor during said back-drive, and also has the advantage of substantial reduction in noise and vibration which would otherwise arise from rotation of the gearing and the higher speed movement of pinion 14 and shaft 12.
The clutch 32 may also be subjected to less stress and wear and tear as it is associated with the slower moving intermediate element 18 when power driven rather than the rapidly rotating motor shaft 12 as is the arrangement commonly employed with known actuator trans0issions.
It will be appreciated that other forms of clutch providing one way drive between intermediate element IS and output element 22 could be enployed , for example ratchet and pawl devices, one way friction clutches, or possibly magnetic or electro-magnetic clutches.
Similarly various forts of output element could be employed e.g., for some applications, an arcuately displaceable crank or cam and cam follower arrangement might be substituted for the worm shaft ad nut shown.
Conveniently pinion 14, intermediate element 18, worn shaft 22 with bell formation 26, and/or plunger 30 including nut 28 are mop inns of high duty low-friction plastics materials for durabiliLy, self-lubrication, and quieter operation. However other materials or combillations of materials may be used ; also the journalling and means of aligning intermediate element 18 may vary from that shown, e.g. element 18 could include a shaft fast therewith journalled in independent support means coaxially with shaft 22 and/or a running fit in one end of the latter.
Claims (7)
1. A powered drive transmission for use in a vehicle door lock actuator
compri -)nl\ "?b a rotatably power driven input shaft, a rotatable intermediate element, gearing drivingly connecting the input shaft with the intermediate element, a rotatable output element linked in use to drive a locking device between locked and unlocked positions, and an automatic clutch acting between the intermediate element and the output element to transmit motion from the former to the latter on powered rotation of the input shaft but to permit freewheeling rotation of the output element without drive transmission to the intermediate element and gear train on back driving caused by movement of the actuator by manual or other forces.
2. A transmission as in Claim 1 wherein the input shaft is the shaft of an electric motor powering the actuator, said gearing comprising a pinion fast with said shaft meshing directly with a toothed gear wheel portion of the intermediate element.
3. A transmission as in Claim 1 or 2 wherein the clutch is a centrifugal clutch having one or more centrifugally displaceable driving elements carried on the intermediate element coacting within a clutch output formation of the output element.
4. A transmission as in Claim 1, 2 or 3 wherein the output element includes a worm shaft in engagement with a nut for rectilinear motion of linkage driving said locking device.
5. A transmission as in any preceding claim wherein the intermediate element and the output element are located in co-axial alignment on a common shaft.
6. A powered drive transmission substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
7. A vehicle door lock actuator including a transmission as in any preceding claim.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9404629A GB2287277B (en) | 1994-03-10 | 1994-03-10 | Vehicle lock actuator transmission |
| PCT/GB1995/000516 WO1995024534A1 (en) | 1994-03-10 | 1995-03-10 | Vehicle lock actuator transmission |
| AU18568/95A AU1856895A (en) | 1994-03-10 | 1995-03-10 | Vehicle lock actuator transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9404629A GB2287277B (en) | 1994-03-10 | 1994-03-10 | Vehicle lock actuator transmission |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9404629D0 GB9404629D0 (en) | 1994-04-27 |
| GB2287277A true GB2287277A (en) | 1995-09-13 |
| GB2287277B GB2287277B (en) | 1997-11-12 |
Family
ID=10751603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9404629A Expired - Fee Related GB2287277B (en) | 1994-03-10 | 1994-03-10 | Vehicle lock actuator transmission |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1856895A (en) |
| GB (1) | GB2287277B (en) |
| WO (1) | WO1995024534A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010031997A1 (en) * | 2008-09-16 | 2010-03-25 | John Phillip Chevalier | Actuators |
| US8800402B2 (en) | 2010-03-04 | 2014-08-12 | Vingcard Elsafe As | Motor mechanism |
| US20170267257A1 (en) * | 2014-12-02 | 2017-09-21 | I Mod S.A.S Di Ceccato Luigi & C | System for moving electrically powered apparatuses |
| CN109236053A (en) * | 2018-10-29 | 2019-01-18 | 深圳市罗曼斯科技有限公司 | A kind of arrangement of clutch and a kind of gearbox |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19535065C2 (en) * | 1995-09-21 | 1999-07-22 | Friedrich Schmid | Electromechanical locking device, in particular electromechanical lock |
| DE19617979C2 (en) * | 1996-05-06 | 1999-12-02 | Garny Sicherheitstechn Gmbh | Electromechanical clamping unit |
| DE19619128A1 (en) * | 1996-05-11 | 1997-11-13 | Bayerische Motoren Werke Ag | Central locking unit with ripple counter |
| GB2392958B (en) | 2000-03-15 | 2004-06-09 | John Phillip Chevalier | Centrifugal clutch |
| CN104863424B (en) * | 2015-04-13 | 2018-04-03 | 许昌学院 | A kind of new unlocking mechanical safety device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054725A (en) * | 1979-06-09 | 1981-02-18 | Fichtel & Sachs Ag | Vehicle lock transmission mechanism |
| US4645050A (en) * | 1984-05-19 | 1987-02-24 | Kiekert Gmbh & Co Kommanditgesellschaft | Device for actuating a motor vehicle door closure |
| US4821521A (en) * | 1986-08-12 | 1989-04-18 | Kiekert Gmbh & Co. Kommanditgesellschaft | Positioning drive for a motor vehicle door closing device |
| GB2218729A (en) * | 1988-05-18 | 1989-11-22 | Ohi Seisakusho Co Ltd | Electric actuator for door lock |
| GB2241737A (en) * | 1987-09-21 | 1991-09-11 | Kelsey Hayes Co | Door lock actuator with centrifugal clutch |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1317323C (en) * | 1988-03-19 | 1993-05-04 | Shinjiro Yamada | Clutch for actuator for automobile |
| US4850466A (en) * | 1988-05-19 | 1989-07-25 | General Motors Corporation | Clutch for power door lock actuator |
-
1994
- 1994-03-10 GB GB9404629A patent/GB2287277B/en not_active Expired - Fee Related
-
1995
- 1995-03-10 WO PCT/GB1995/000516 patent/WO1995024534A1/en active Application Filing
- 1995-03-10 AU AU18568/95A patent/AU1856895A/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054725A (en) * | 1979-06-09 | 1981-02-18 | Fichtel & Sachs Ag | Vehicle lock transmission mechanism |
| US4645050A (en) * | 1984-05-19 | 1987-02-24 | Kiekert Gmbh & Co Kommanditgesellschaft | Device for actuating a motor vehicle door closure |
| US4821521A (en) * | 1986-08-12 | 1989-04-18 | Kiekert Gmbh & Co. Kommanditgesellschaft | Positioning drive for a motor vehicle door closing device |
| GB2241737A (en) * | 1987-09-21 | 1991-09-11 | Kelsey Hayes Co | Door lock actuator with centrifugal clutch |
| GB2218729A (en) * | 1988-05-18 | 1989-11-22 | Ohi Seisakusho Co Ltd | Electric actuator for door lock |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010031997A1 (en) * | 2008-09-16 | 2010-03-25 | John Phillip Chevalier | Actuators |
| US8800402B2 (en) | 2010-03-04 | 2014-08-12 | Vingcard Elsafe As | Motor mechanism |
| US20170267257A1 (en) * | 2014-12-02 | 2017-09-21 | I Mod S.A.S Di Ceccato Luigi & C | System for moving electrically powered apparatuses |
| US10661813B2 (en) * | 2014-12-02 | 2020-05-26 | I Mod S.A.S Di Ceccato Luigi & C | System for moving electrically powered apparatuses |
| CN109236053A (en) * | 2018-10-29 | 2019-01-18 | 深圳市罗曼斯科技有限公司 | A kind of arrangement of clutch and a kind of gearbox |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1856895A (en) | 1995-09-25 |
| GB2287277B (en) | 1997-11-12 |
| WO1995024534A1 (en) | 1995-09-14 |
| GB9404629D0 (en) | 1994-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020310 |