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Drum brake S-cam having offset cam followers

一种制动器、凸轮的技术，应用在机械驱动鼓式制动器、制动器、制动件等方向，能够解决限制制动衬片潜在厚度、制动器10促动效率低、高停机时间和维修等问题，达到增加促动效率、提高寿命、降低机械应力的效果

Active Publication Date: 2017-08-29
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-cam having offset cam followers
  • Drum brake S-cam having offset cam followers
  • Drum brake S-cam having offset cam followers

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] 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 a 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).

[0017] A hub 44 is provided for mounting various components of the brake...

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PUM

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Abstract

A drum brake (40) is provided that improves the direction of the actuating forces to reduce stress, improve efficiency and permit thicker brake linings. First and second brake shoes (48, 50) each have a first end pivotally coupled to a brake spider (44). First and second cam followers (58, 60) are disposed at corresponding second ends of the brake shoes. A cam (56) engages the cam followers (58, 60) with movement of the cam causing the brake shoes (48, 50) to move between positions of engagement and disengagement with a braking surface. The cam followers (48, 50) are offset such that a center of the first cam follower is disposed at a first distance (D1) from a center axis (64) of the brake and a center of the second cam follower is disposed at a second distance (D2) from the center axis (64) with the first distance different from the second distance so as to improve 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] Referring to FIG. 1 , a conventional prior art drum brake 10 is shown. 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 a conventional S-cam drum brake shown in FIG. 1 , rollers 24 , 26 or cam followers ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D65/08F16D65/22B60T1/06F16D121/16F16D125/30
CPCB60T1/067F16D51/22F16D65/08F16D65/22F16D2125/30F16D2121/16
Inventor F·W·贝尔万格
Owner BENDIKS SPAJSER FAUNDEJSHN BREJK LLK