Cable drive assembly for motor vehicle

Information

  • Patent Grant
  • 6405571
  • Patent Number
    6,405,571
  • Date Filed
    Wednesday, October 13, 1999
    25 years ago
  • Date Issued
    Tuesday, June 18, 2002
    22 years ago
Abstract
A cable drive assembly 102 for a motor vehicle locking system is described. A lock mechanism 104 is mounted on a first carrier 108. The first carrier is connected to a second carrier 110 by a cable, such that turning of an appropriate key in the lock causes the first carrier to rotate. In turn this causes the second carrier to rotate. Rotation of the second carrier causes a latch mechanism remote from the locking system to be actuated. The first carrier is held in a first position within a housing prior to insertion of the lock mechanism. Insertion of the lock mechanism during assembly of the locking system frees the carrier and allows it to rotate in response to turning of the lock mechanism.
Description




BACKGROUND OF THE INVENTION




The present invention relates to a locking system for a motor vehicle, and in particular to a cable drive assembly for a motor vehicle locking system. The cable drive assembly allows a motor vehicle door lock to be located at a position remote from a motor vehicle door latch mechanism.




Known locking systems for motor vehicles can be complex to manufacture and difficult to assemble. In particular, there is a difficulty in maintaining a lock mechanism in a desired correct relationship with an associated housing and drive mechanism during assembly. There is scope for failure of the locking system in all of these areas. It is an advantage of the present invention that it provides for ease of assembly and manufacture. It also allows for the motor vehicle door lock to be positioned at a location remote from the motor vehicle door latch mechanism.




SUMMARY OF THE INVENTION




According to a first aspect of the present invention, a cable drive assembly for a motor vehicle locking system comprises a housing, a first carrier means mounted within the housing, a second carrier means mounted within the housing, and cable means connecting the first and second carrier means.




Preferably the first carrier means is held in a first position within the housing prior to insertion of a lock mechanism and is mounted in a second position for rotation within the housing when the lock mechanism has been inserted. More preferably, the housing and the first carrier means are provided with complementary locating features to hold the first carrier means in the first position.




Preferably, the second carrier means is mounted for rotation within the housing.




Preferably, the cable means comprises a cable connected at a first end to the first carrier means, at an intermediate point to the second carrier means and at a second end to the first carrier means.




Preferably, the housing is provided with a flange to prevent interference with the cable means.




Preferably, the housing is provided with a cover to prevent interference with the cable means.




According to a second aspect of the present invention, a locking mechanism for a motor vehicle comprises a lock mechanism, a cable drive assembly according to the first aspect of the invention, drive means and a latch mechanism.











BRIEF DESCRIPTION OF THE DRAWINGS




The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:





FIG. 1

shows an exploded perspective view of a part of a cable drive assembly in accordance with the present invention;





FIG. 2

shows a side view of a cable drive base housing included in the part shown in

FIG. 1

;





FIG. 3

shows a plan view of the cable drive base housing shown in

FIG. 2

;





FIG. 4

shows an opposite side view of the cable drive base housing shown in

FIG. 2

;





FIG. 5

shows a sectional view along line V—V of

FIG. 3

;





FIG. 6

shows an end view of the cable drive base housing shown in

FIG. 2

;





FIG. 7

shows a plan view of a drive pulley included in the cable drive base housing shown in

FIG. 1

;





FIG. 8

shows a sectional view along line VIII—VIII of the drive pulley shown in

FIG. 7

;





FIG. 9

shows a plan view from above of driven pulley included in the cable drive base housing shown in

FIG. 1

;





FIG. 10

shows a plan view from below of the driven pulley shown in

FIG. 9

; and





FIG. 11

shows in section a door assembly incorporating a cable drive assembly according to the present invention.











Referring to

FIGS. 1

to


10


of the drawings, a cable drive assembly


2


for a motor vehicle locking system is shown.




DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS




The cable drive assembly includes a housing. The housing comprises a base


4


and a cover


6


. The cable drive assembly further comprises a first carrier means mounted within the housing, a second carrier means mounted within the housing, and a cable means in the form of a cable assembly


8


connecting the first and second carrier means.




The cable drive base


4


comprises a substantially elongate member


10


having rounded portions at first and second ends thereof, and a first wall


12


extending in a first direction normally thereto around the periphery of the elongate member. A substantially circular opening


14


, is provided at the first end of the elongate member. Three dogs


16


,


18


,


20


are provided disposed about a periphery of the opening


14


extending in the first direction. A second wall


22


around the opening extends in a second direction away from the first end of the elongate member. A flange member


23


extends from the elongate member to the circular wall to increase the structural strength of the base. The elongate member is further provided with two pairs of guide means


24


,


26


and a pair of guide rails


28


within a region of the elongate member bounded by the first wall. Each of the guide means comprise a pair of oppositely disposed resilient members


27


defining a gap therebetween. Each guide rail


28


takes the from of an upstanding member. A rotatable axle


30


is mounted at the second end of the elongate member, again within the region bounded by the first wall. The rotatable axle is conveniently “X” shaped in plan view and includes a circular flange


31


at a lower end thereof. An outer surface of the first wall is provided with a plurality of protrusions


32


extending flexibly away from an outer surface of the first wall.




The first carrier means conveniently comprises a drive pulley


34


. The drive pulley is substantially circular and is provided with a “V” shaped groove


36


running around a periphery of the pulley and a single recess


38


is formed at the periphery of the drive pulley extending through a thickness of the pulley. The drive pulley further comprises an upper surface


40


and a lower surface


42


. The upper surface is provided with a boss


44


. The lower surface is provided with a pair of shaped recesses


46


,


48


to receive in use engagement means of a locking mechanism, three recesses


50


,


52


,


54


disposed about the periphery of the lower surface and a central recess


56


shaped to receive a portion of the locking mechanism which in use will function as an axis of rotation for the drive pulley


34


. The three recesses are conveniently equally spaced about the periphery of the lower surface and are adapted to engage with the dogs


16


,


18


,


20


provided about the circular opening in the base housing. The central recess is conveniently stepped in section and circular in plan view.




The second carrier means conveniently comprises a driven pulley


58


. The driven pulley is substantially circular and is provided with a “V” shaped groove running around a periphery of the pulley. A pair of recesses


66


,


68


are formed at a periphery of the driven pulley and extend therethrough. The driven pulley further comprises an upper surface


60


and a lower surface


62


. The upper surface is provided with an upstanding circular wall


64


. Within the upstanding wall are located engagement means


70


. In use, the engagement means engage complementary features of a drive means. The lower surface is provided with a shaped recess


72


to engage the rotatable axle provided at the second end of the elongate member. The driven pulley fits over and is supported by the rotatable axle.




The cable assembly


8


comprises a length of cable


74


having first and second ends. At the first and second ends of the cable there are provided respective first and second barrel shaped engagement features


76


,


78


. The engagement features are secured to the respective end of the cable by any suitable means. A further barrel shaped engagement feature


80


is secured to an intermediate portion of the cable. A first sheath


82


is provided on the cable between the first end of the cable and the intermediate portion of the cable. A second sheath


84


is provided on the cable between the second end of the cable and the intermediate portion of the cable. The cable


74


may run freely within each of the first and second sheaths.




The cable drive cover


6


comprises an elongate member


86


. A first end of the elongate member is provided with a sunken dimple


88


. In use, a reverse side of the sunken dimple


88


is adapted to receive the boss


44


of the drive pulley. A second end of the elongate member is provided with an upstanding wall disposed about a generally circular opening


92


extending in a first direction from the elongate member. The elongate member further comprises an upstanding wall


94


extending in a second direction about a periphery of the elongate member. The wall is provided with a plurality of cut out portions


96


.




The cable drive assembly is used to form part of a locking system for a motor vehicle. The cable drive assembly may conveniently be assembled prior to use in the locking system. The further barrel shaped engagement feature


80


is located within the recess


38


in the drive pulley and each of the first and second barrel shaped engagement features


76


,


78


are located within a respective recess


66


,


68


provided in the driven pulley. The driven pulley is placed in position over the rotatable axis


30


. The driven pulley


34


is placed over the circular opening such that the recesses


50


,


52


,


54


provided on the lower side of the drive pulley engage with the dogs


16


,


18


,


20


provided about the opening. The ends of the sheaths


82


,


84


are pressed into the guide means on either side of the base housing such that the sheaths pass between the upstanding wall of the base housing and the guide rail


28


on each side of the housing. The cable drive cover


6


can then be placed over the cable drive base housing


4


and pressed home such that the plurality of protrusions


32


provided on the base engage in the plurality of openings


96


provided in the cover.




In this way the drive pulley is held in a first position within the housing prior to insertion of a lock mechanism. The lock mechanism is provided with protrusions that engage the shaped recesses


46


,


48


in the lower side of the drive pulley. Further insertion of the lock mechanism pushes the drive pulley off the dogs and thereby frees the carrier to allow the drive pulley to rotate. It can be seen that the housing and associated parts can be mounted into position in a door assembly, prior to insertion of the lock mechanism. Once the housing is in position, the lock mechanism can only be received in the housing in the correct position, i.e. when the protrusions on the lock mechanism engage with the shaped recesses


46


,


48


provided on the first carrier means. Thus there is no difficulty in maintaining the lock mechanism and the housing in the correct relationship during assembly as has been the case in the past.




Referring to

FIG. 11

, there is shown a motor vehicle door assembly


100


incorporating a cable drive assembly


102


according to the present invention. A lock mechanism


104


is shown retained in position in an outer panel


106


of the door assembly. The lock mechanism has pushed the drive pulley


108


from the dogs such that in response to turning of the lock, upon insertion and rotation of an appropriate key, the drive pulley is rotated by protrusions provided at one end of the lock mechanism engaging with shaped recesses provided on the lower side of the drive pulley. The cable assembly (not shown) transfers rotation of the drive pulley


108


to the driven pulley


110


. A latch mechanism


112


is provided to secure the motor vehicle door assembly in a closed position in a motor vehicle. The driven pulley


110


is connected to the latch mechanism


112


by drive means. In the illustrated embodiment, the drive means is in the form of a paddle


114


.



Claims
  • 1. A motor vehicle locking system comprising:a housing; a first pulley mounted for rotation about a first axis in the housing; a second pulley mounted for rotation about a second axis in the housing; the first and second pulleys being drivingly connected by a cable, the cable being secured at first and second ends to one of the first and second pulleys and at an intermediate point to the other of the first and second pulleys; means being provided to connect the first pulley drivingly to a lock mechanism; and means being provided for connecting the second pulley drivingly to a latch mechanism; and one of said pulleys being moved axially from a first position to a second position upon connection to one of said lock mechanism or said latch mechanism, means being provided to prevent rotation of the said one pulley when in its first position.
  • 2. The motor vehicle locking system according to claim 1, wherein the housing and the first pulley are provided with complementary locating features to hold the first pulley in the first position.
  • 3. The motor vehicle locking system as set forth in claim 1 wherein the housing is provided with a flange to prevent interference with the cable.
  • 4. The motor vehicle locking system according to claim 1, wherein the housing is provided with one of a flange and a cover to prevent interference with the cable.
  • 5. A motor vehicle locking system comprising:a cable drive assembly having a housing; a first pulley mounted about a first axis in the housing; a second pulley mounted about a second axis in the housing; the first and second pulleys being drivingly connected by a cable, the cable being secured at first and second ends to one of the first and second pulleys and at an intermediate point to the other of the first and second pulleys; a lock mechanism drivingly connectable with the first pulley; a latch mechanism drivingly connectable to the second pulley; and wherein one of said first and second pulleys of the cable drive assembly is axially movable along the respective first and second axis between a first non-rotatable position and a second rotatable position upon connection with the respective lock and latch mechanism.
  • 6. The motor vehicle locking system according to claim 5, wherein the housing and the first pulley are provided with cooperating positioning means to hold the first pulley in the first non-rotatable position.
  • 7. The motor vehicle locking system as set forth in claim 5 wherein the housing is provided with a flange to prevent interference with the cable.
  • 8. The motor vehicle locking system according to claim 5, wherein the housing is provided with one of a flange and a cover to prevent interference with the cable.
  • 9. The motor vehicle locking system according to claim 5 wherein the first pulley of the cable drive assembly is coupled to the lock mechanism and the second pulley of the cable drive assembly is coupled to a latch mechanism for driving the latch mechanism in response to operation of the locking mechanism.
  • 10. A motor vehicle locking system comprising:a cable drive assembly having a housing; a first pulley mounted about a first axis in the housing; a second pulley mounted about a second axis in the housing; the first and second pulleys being drivingly connected by a cable, the cable being secured at first and second ends to one of the first and second pulleys and at an intermediate point to the other of the first and second pulleys; a lock mechanism drivingly connectable with the first pulley; a latch mechanism drivingly connectable to the second pulley; one of said first and second pulleys of the cable drive assembly is axially movable along the respective first and second axis between a first non-rotatable position and a second rotatable position upon connection with the respective lock and latch mechanism; the housing and the first pulley are provided with cooperating positioning means to hold the first pulley in the first non-rotatable position; the housing is provided with a flange to prevent interference with the cable; and wherein the housing is provided with one of a flange and a cover to prevent interference with the cable.
Priority Claims (1)
Number Date Country Kind
9825760 Nov 1998 GB
US Referenced Citations (19)
Number Name Date Kind
4030373 Leonard Jun 1977 A
4342559 Williams Aug 1982 A
4530676 Leonard Jul 1985 A
4559027 Sattel Dec 1985 A
4714452 Kumm et al. Dec 1987 A
4907465 Machida et al. Mar 1990 A
5235866 Truman et al. Aug 1993 A
5535607 Dzurko et al. Jul 1996 A
5555769 Lichtenberg Sep 1996 A
5590917 Brooks et al. Jan 1997 A
5603539 Gruhn et al. Feb 1997 A
5642636 Mitsui Jul 1997 A
5666834 Inoue Sep 1997 A
5730027 Hormann Mar 1998 A
5752811 Petro May 1998 A
5813282 Azuma Sep 1998 A
5852943 Dutka et al. Dec 1998 A
6045272 Ryan et al. Apr 2000 A
6165087 Iammatteo Dec 2000 A
Foreign Referenced Citations (8)
Number Date Country
2553335 Aug 1976 DE
59658 Sep 1982 EP
303304 Feb 1989 EP
304357 Feb 1989 EP
0 375 275 Jun 1990 EP
2 757 558 Jun 1998 FR
787611 Dec 1957 GB
149656 Sep 1982 JP