Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1992-02-10
1993-11-30
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Hand operated
745005, 745024, 745026, 192111A, F16C 110
Patent
active
052654931
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for self-adjusting or regulating the length of an automobile parking brake cable, in particular for private passenger cars and transport vehicles.
As is known, the purpose of the parking brake incorporated as original equipment in automobiles is to hold the vehicle immobile once it has been parked, even when it is parked on a steep slope. The parking brake generally acts on the rear wheels of the automobile and, in any case, the parking brake mechanical actuating device is independent of the service or foot brake actuating device.
The parking brake is generally actuated manually by a brake lever which is disposed in the vehicle and connected by sheathed steel cables to the mechanisms applying the brake shoes or calipers which immobilize the vehicle on each rear wheel. The said brake lever is provided with mechanical means setting the position in which the parking brake is operative, preventing the said brake lever from accidentally coming out of the braking position under normal service conditions.
The said sheathed steel cables connecting the brake lever to the brake shoe or caliper actuating mechanism of each rear wheel are subject to variations of length. This causes unequal operation of the brake device which is compensated by mechanisms acting permanently on the sheathed steel cables.
The known parking brake sheathed steel cable length compensation mechanisms suffer, nevertheless, from notable operative drawbacks when the brake shoes or calipers are temporarily seized, i.e., when the brake shoes or calipers do not return to the normal released position until some time has passed after releasing the brake lever. This situation is frequently caused by accumulation of ice on the brake shoe or caliper actuating mechanisms during extended parking of the vehicle in the open air, in regions where low temperatures are usual.
SUMMARY OF THE INVENTION
To provide a solution to the problems caused by temporary seizure of the automobile parking brake shoes or calipers under the above conditions, a parking brake cable length self-adjusting device of a new structure is disclosed.
The device of the invention is characterized in that it has an adjusting mechanism which is suitably disposed relative to the sheathed steel cable connecting the brake shoe or caliper actuating mechanism of one of the vehicle rear wheels to the brake lever and which sets and adjusts the length of sheathed cable comprised between said the mechanisms; and a control mechanism which is suitably disposed relative to the steel cable connecting the brake shoe or caliper actuating mechanisms of the rear wheels with the parking bake lever and is permanently connected by a sheathed steel cable to the adjusting mechanism with which it acts coordinatedly. In this way the control mechanism commands the setting and adjusting operations of the said adjusting mechanism, depending on the position of the brake lever.
The adjusting mechanism is formed by an essentially frustoconical hollow main body member of sufficient size to receive mechanical actuating means which are firmly connected to the control mechanism by way of the steel cable connecting the adjusting and control mechanisms, and mechanical means setting and adjusting the length of the sheathed steel cable located between the adjusting mechanism and the actuating mechanism of the brake shoes or caliper of the corresponding rear wheel.
The main body member of the adjusting mechanism is formed, at the end facing the rear wheel brake shoe or caliper actuating mechanism with a concentric radial extension provided with a tangential extension having a bore of stepped section. The bore is so dimensioned that the steel cable, devoid of sheath, linking the adjusting and control mechanisms may suitably slide therethrough, and so that it can receive and firmly fix the corresponding end of the sheath of said steel cable. At the other end it has a longitudinal extension which is dimensioned and shaped to allow the attachment of the adjust
REFERENCES:
patent: 4735298 (1988-04-01), Haugel
patent: 4751851 (1988-06-01), Deligny et al.
patent: 4756397 (1988-07-01), Deligny
patent: 4762017 (1988-08-01), Jaksic
patent: 4787263 (1988-11-01), Jaksic
patent: 4799400 (1989-01-01), Pickell
patent: 4838109 (1989-06-01), Stewart
patent: 4887705 (1989-12-01), Soland et al.
patent: 5086662 (1992-02-01), Tayon et al.
Roca Agustin
Solano Victorino
Luong Vinh T.
Pujol T. Tarrago S.A.
Striker Michael J.
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