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Floating type brake pad

A brake pad, floating technology, applied in the direction of brake parts, friction linings, mechanical equipment, etc., can solve the problems of unstable thermoelasticity, poor braking performance, short life of brake discs, etc. Improved performance, increased service life, consistent heat flux

Inactive Publication Date: 2015-03-25
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the thermoelastic instability of the existing train brake discs leads to poor braking performance and short service life of the brake discs, and then provides a brake disc with less thermal deformation. floating brake pads

Method used

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  • Floating type brake pad
  • Floating type brake pad
  • Floating type brake pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Figure 1-4 It is a floating brake pad of the present invention, which includes a back plate 1; several friction blocks 2 arranged on the back plate 1; and a retaining spring connecting the friction blocks 2 to the back plate 1 3; if figure 1 As shown, taking the virtual center of the backplane 1 as the center, the backplane 1 is divided into three rings a, the lengths of the three rings a in the radial direction are equal, and each of the rings a The friction area of ​​the friction block 2 inside is no more than 12% of the reference average friction area compared with the reference average friction area, that is, the friction areas of equidistant rings are approximately equal. The arrangement structure of the friction blocks can make the heat flux density of the back plate consistent, and the friction heat generated by the friction blocks during braking can be evenly distributed on the back plate, which avoids the excessive temperature gradient of the existing floatin...

Embodiment 2

[0036] On the basis of Embodiment 1, in this embodiment, in the floating brake pad, the center line of the brake pad is centered, and the distance between the friction blocks 2 on both sides of the brake pad is the center line of the brake pad. Compared with the reference distance, the sum of the distances does not exceed 10% of the reference distance. Such as Figure 5 As mentioned above, since the brake pad A is installed on the brake pad support D, and the brake caliper B and the brake pad support D are connected through the joint C, the axis of the joint C constitutes the joint of the present invention. Brake force center line.

[0037] In this embodiment, for the floating brake pad, since the friction block is arranged symmetrically on the back plate 1, the sum of the distances from the friction block 2 to the force center line of the brake pad can be obtained by left side or right friction block calculation, such as figure 2 As shown, among the five friction blocks o...

Embodiment 3

[0040] The structure of this embodiment is basically the same as that of Embodiment 2, the difference is that in this embodiment, the outer contour of the friction block 2 is located inside the outer contour of the back plate 1 or is in line with the outer contour of the back plate 1 cut.

[0041] In other embodiments, the floating brake pad takes the center of the brake disc as the center, and divides the back plate 1 into several equidistant rings a, and each of the rings a in the ring a The friction areas of the friction blocks 2 are equal; with the center line of the brake pads as the center, the sum of the distances between the friction blocks 2 on both sides and the center line of the brake pads is equal; the above scheme is the ideal state of the present invention. Considering the processing cost of the floating brake pad comprehensively, the floating brake pad takes the center of the brake disc as the center and divides the back plate 1 into several equidistant rings a...

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Abstract

The invention discloses a floating type brake pad. The floating type brake pad comprises a back plate (1) and a plurality of friction blocks (2) installed on the back plate (1), the friction blocks (2) are connected to the back plate (1) through a plurality of snap springs (3) arranged on the other side of the back plate (1), and disc springs (4) are arranged between the friction blocks (2) and the back plate (1); the back plate (1) is separated into a plurality of circular rings (a) by taking the circle center of a brake disc matched with the floating type brake pad as a circle center, the radial lengths of the circular rings (a) are equal, and the difference between the friction area of the friction block (2) in each circular ring (a) and a reference average friction area does not exceed 15% of the reference average friction area. The floating type brake pad solves the problems that unstable thermoelasticity of an existing floating type brake pad causes poor braking stability and the service life of the existing floating type brake pad is short.

Description

technical field [0001] The invention relates to a disc brake device applied to high-speed trains, in particular to a floating brake pad. Background technique [0002] In the train disc brake system, the brake pad is one of the key components. The braking force is applied to the brake pad through the brake caliper, so that the friction block of the brake pad contacts the brake disc to absorb kinetic energy. Make the train brake to stop. When the friction block is in contact with the brake disc and slides relative to each other, frictional heat will be generated on the sliding surface. Frictional heat causes thermal deformation of the two at the contact surfaces. Thermal deformation in turn affects the contact pressure distribution between the friction surfaces. For a given coefficient of friction, there is a certain critical sliding velocity of the brake disc, above which the nominally evenly distributed contact pressure becomes unstable, creating pressure and friction in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/04F16D69/04
Inventor 吴佩芳
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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