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Disc brake caliper

a disc brake caliper and disc brake technology, applied in the direction of brake types, slack adjusters, mechanical devices, etc., can solve the problems of comparatively high price of disc brake calipers, prone to damage, and complicated force transmission from the lever to the cross bar

Inactive Publication Date: 2001-06-19
HALDEX BRAKE PROD AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

A less complex, cheaper and more reliable design is according to the invention attained in that bearing tappets, parallel with the cross bar, are fixedly connected to the inside of the cover and in that the lever, besides an arm for actuation by the brake cylinder, comprises a curved wedge, having an inner cylindrical surface in engagement with outer cylindrical surfaces of the bearing tappets and an outer cylindrical surface--with greater radius than the inner cylindrical surface--in engagement with an inner cylindrical surface in the cross bar.
According to a modified embodiment the adjuster housing is provided with external gears in engagement with a gear wheel rotatably journalled in the cover, the gear wheel in turn being in engagement with an internal gear segment in an arcuate yoke of the lever. By this design it is possible to obtain a higher exchange ratio and thus a faster takeup of excessive slack.

Problems solved by technology

In both these designs the force transmission from the lever to the cross bar is rather complex.
This means that these disc brake calipers are comparatively expensive and vulnerable.

Method used

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Examples

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Embodiment Construction

A disc brake caliper, preferably for use in heavy road vehicles, is shown in FIGS. 1 and 2. As is well known in the art, a caliper of this kind is to be mounted in a vehicle underframe astraddle of a brake disc (not shown) on a rotating axle of the vehicle.

The main components of the disc brake caliper are a housing 1 and a cover 2, which are attached to each other by means of screws 3. Attached to the cover 2 is a brake cylinder 4, normally a pneumatic brake cylinder, for delivering a brake force to the caliper. The brake cylinder 4 is only indicated in FIG. 1 with dash dotted lines.

In a way to be described the brake force from the brake cylinder 4 is transmitted to a brake pad 5 engaging the brake disc (not shown). The reaction force at braking is taken up by a similar brake pad (not shown) attached to the housing 1 at the other side of the brake disc (not shown), as is well known in the art.

The brake pad 5 is attached to a pad holder 6, which in turn--via a heat shield 7--is attac...

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PUM

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Abstract

A disc brake caliper comprises a housing (1) to be arranged to straddle a vehicule brake disc, a cover (2) attached to the housing, two thrust sleeves (8), which are connected to a brake pad (5) and which are axially movable in the housing, a cross bar (9) connecting the two thrust sleeves, and a lever (17) for transmitting a brake force from a brake cylinder (4), attached to the caliper, to a cross bar. Bearing tappets (20), parallel with the cross bar, are fixedly connected to the inside of the cover. The lever has a curved wedge (19) with two cylindrical surfaces (19', 19'') in engagement with corresponding cylindrical surfaces of the bearing tappets and the cross bar, respectively. An adjuster mechanism (28) is arranged on a splined shaft (29) rotatably journalled in the bearing tappets.

Description

TECHNICAL FIELDThis invention relates to a disc brake caliper, comprising a housing to be arranged astraddle of a vehicle brake disc, a cover attached to the housing, two thrust sleeves, which are connected to a brake pad holder provided with a brake pad for braking engagement with a brake disc and which are axially movable in the housing at a distance from each other, a cross bar connecting the two thrust sleeves, and a lever for transmitting a brake force from a brake cylinder, attached to the caliper, to a cross bar.A disc brake caliper of this kind is primary intended for a road vehicle but may quite as well be used for a rail vehicle.TECHNICAL BACKGROUNDPrior designs for disc brake calipers of this kind are for example shown in EP-A-0 569 031 and EP-B-0 291 071. In both these designs the force transmission from the lever to the cross bar is rather complex. This means that these disc brake calipers are comparatively expensive and vulnerable.THE INVENTIONA less complex, cheaper a...

Claims

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Application Information

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IPC IPC(8): F16D65/14F16D65/38F16D65/56F16D55/224F16D65/16F16D65/18
CPCF16D65/18F16D65/183F16D65/568F16D2065/785F16D2121/14F16D2125/26F16D2125/32F16D65/16
Inventor SEVERINSSON, LARS
Owner HALDEX BRAKE PROD AB