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Drum brake s-cams with offset cam followers

A brake, cam technology, applied in the direction of mechanically driven drum brakes, brakes, brake components, etc., can solve the problems of limiting the potential thickness of brake linings, low brake 10 actuation efficiency, high downtime and maintenance, etc. Increased actuation efficiency, increased life, and reduced mechanical stress

Active Publication Date: 2019-04-12
BENDIKS SPAJSER FAUNDEJSHN BREJK LLK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Added stresses can lead to cracks in the shoe web and costly downtime and repairs
Second, because the effective brake actuation force is less than the force exerted by the cam 22, the actuation efficiency of the brake 10 is less than optimal
Third, the amount of rotation of the cam 22 and thus the deflection of the brake shoes 18, 20 is relatively limited, limiting the potential thickness of the brake linings and requiring more frequent maintenance and / or repairs

Method used

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  • Drum brake s-cams with offset cam followers
  • Drum brake s-cams with offset cam followers
  • Drum brake s-cams with offset cam followers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Referring now to the drawings, in which like reference numerals are used to identify like parts throughout the various views, figure 2 A brake 40 according to one embodiment of the invention is shown. Brakes 40 are provided to slow the rotation of one or more vehicle wheels. Brake 40 is particularly suitable for use in heavy vehicles. It should be understood, however, that brake 40 may be used in a wide variety of vehicular and non-vehicular applications. The brake 40 is configured to apply an annular brake drum 42 that rotates with the vehicle wheel or wheels at one end of an axle (not shown). The brake 40 may include a brake hub 44, one or more anchor pins 46, brake shoes 48, 50, return and retaining springs 52, 54, and a position for engaging the brake shoes 48, 50 with a braking surface and A device that moves between disengaged positions (such as cam 56 and rollers or cam followers 58, 60).

[0018] A hub 44 is provided for mounting various components of the b...

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PUM

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Abstract

A drum brake is provided that improves the direction of actuation force to reduce stress, improve efficiency and allow thicker brake linings. The first brake shoe and the second brake shoe each have a first end pivotably coupled to the same or a different anchor pin on the brake hub. A first cam follower and a second cam follower are arranged at respective second ends of the brake shoes. The cam engages the cam follower, wherein movement of the cam causes the brake shoe to move between a position of engagement with the braking surface and a position of disengagement. The cam followers are offset such that the center of the first cam follower is a different distance from the anchor pin or pins supporting the brake shoe, thereby improving the direction of the cam force vector.

Description

technical field [0001] The present invention relates to vehicle brakes. In particular, the present invention relates to drum brakes in which a brake actuation device engages a brake shoe in a biased position to improve the direction of brake actuation force. Background technique [0002] refer to figure 1 , shows a conventional prior art drum brake 10 . In conventional drum brakes, the drum 12 rotates with the wheel or wheels closest to one end of the axle. The drum 12 defines a radially inner braking surface 14 . Disposed about the shaft is a brake hub 16 to which one end of a pair of brake shoes 18 , 20 is pivotally mounted. Opposite ends of each brake shoe 18, 20 are engaged by an actuating member, such as a cam 22, to position the brake shoe 18, 20 between a position of engagement with the braking surface of the brake drum and a position of disengagement. sports. [0003] as in figure 1 In the conventional S-cam drum brake shown, the rollers 24, 26 or cam follower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D51/22F16D65/22B60T1/06
CPCB60T1/067F16D51/22F16D65/22F16D2125/30
Inventor F·W·贝尔万格
Owner BENDIKS SPAJSER FAUNDEJSHN BREJK LLK