Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1997-10-21
1999-03-09
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Hand operated
745022, 745016, 74503, F16C 110
Patent
active
058786260
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a compensating device for a cable-driven brake system, in particular a motor-vehicle handbrake system. A drive, for instance a drive lever, is connected by a first brake cable to a first brake and a tube of the first brake cable rests on a support located at the generator side. The system comprises a second brake cable of which the inner rope is connected at one end to the compensating device and at the other end to the second brake.
2. Description of the Prior Art
Compensating devices are known in the state of the art. However, the known systems incur a problem in that the drive lever requires being moved through a large excursion to apply the brake. The excursion being the sum of the two displacement paths. In relation to another conventional brake system, with two separate brake cables for each brake, of which the inner ropes are directly connected to the drive lever, the drive excursion of the brake system evincing the initially cited features is twice as large. Another drawback of the known compensating device is that automatic length correction to automatically adjust the brake cables, is precluded.
In the light of this state of the art, it is the object of the invention to further develop a compensating device such that applying the brake requires only a reduced excursion of the drive lever. In an associated feature, the compensating device will assure automatic length correction of the brake cables, in particular automatic adjustment and resetting of brake-cable length.
SUMMARY OF THE INVENTION
The main object of the present invention is to improve the prior art devices. A compensating device comprises a step-up gearing and a first brake cable having an inner rope split in two. One inner rope is connected at one end to the drive and at the other end to the first brake. This compensating device offers the advantage of requiring only a reduced drive excursion to apply both brakes. When compared with those brake systems fitted with two separate brake cables between the drive and each brake, the invention offers the further advantage of only one drive cable being required between the drive and the compensating device. Therefore, material is saved and assembly is simplified. Overall, the compensating device of the invention insures that only a short drive excursion is required to apply both brakes and installation of two separate brake cables between the drive and the particular brake can be eliminated. It was found to be practically advantageous to use a transmission gear with a step-up of 1:2. In such a design, the drive excursion required to apply both brakes in the brake system fitted with the compensating device of the invention, is identical with the drive excursion of a system fitted with two separate brake cables between the drive and the particular brake.
In one advantageous embodiment of the invention, the step-up gearing comprises a gear displaceably guided in a clearance of a housing of the compensating device. The gear is directly or indirectly connected through a guide means to the inner rope connected to the drive. When using such a gear linked to the inner rope, the step-up gearing can be designed in a simple and economic manner.
It was found to be especially advantageous to mount two gear racks on opposite sides of the gear. The teeth of the gear racks mesh with those of the gears. One gear rack is supported in displaceable manner in the compensating device and is connected to the inner rope leading to the first brake. Upon actuation of the drive, and thus a tension exerted on the inner rope on the drive side, the gear will mesh with the opposite gear racks. Because of the gear displacement and rolling motion, the gear rack connected to the inner rope on the brake side is pulled-in at twice the excursion relative to the excursion on the drive-side inner rope. This displacement of the drive-side inner rope additionally is superposed with the motion of the compensating device on account of the reaction of t
REFERENCES:
patent: 2732723 (1956-01-01), Crofton
patent: 2772574 (1956-12-01), Thomas
patent: 3180673 (1965-04-01), Wanlass
patent: 3955658 (1976-05-01), Bustmante
patent: 4646206 (1987-02-01), Bauer et al.
patent: 4887702 (1989-12-01), Ratke et al.
patent: 4919005 (1990-04-01), Schleicher
patent: 4920819 (1990-05-01), Uchida et al.
patent: 5012689 (1991-05-01), Smith
patent: 5392668 (1995-02-01), Burnberger
Kuster & Co. GmbH
Luong Vinh T.
LandOfFree
Compensation device for a cable-operated brake system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation device for a cable-operated brake system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation device for a cable-operated brake system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1310993