JP2009185947A - Disc brake friction material assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide disc brake friction material assemblies which are arranged in series in the peripheral direction of a disc rotor, wherein braking torque received by the friction material assembly located adjacent to the upstream side in the rotating direction of a disc rotor is not input to a torque receiving plate of the friction material assembly located on the downstream side in the rotating direction of the disc rotor. <P>SOLUTION: The plurality of friction material assemblies 23A, 23B are arranged in series in the peripheral direction of the disc rotor. Herein, the ends of the anchor plates 29A, 29B abut on each other, which are mounted to be protruded more than the ends of the torque receiving plates 27A, 27B having assembled friction materials 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disc brake friction material assembly used in, for example, a disc brake device for a railway vehicle, and more specifically, includes a plurality of friction material assemblies arranged in series in the circumferential direction of a disc rotor. The present invention relates to a split-type disc brake friction material assembly.

  The disc brake device includes a disc rotor fixed to an axle, a disc brake friction material assembly disposed to face the disc rotor, and drives the disc brake friction material assembly forward and backward toward the disc rotor. And a brake caliper that is fixed to the vehicle body frame with a built-in actuator, and generates a braking torque by sliding friction when the friction material of the disk brake friction material assembly is pressed against the disk rotor.

  In the case of a disc brake friction material assembly used in a disc brake device for a railway vehicle, a torque receiver that receives a braking torque acting on the friction material is usually assembled with the friction material pressed against the disc rotor on the front side. A plate (sometimes called a pressure plate), an anchor plate fixed to the back surface of the torque receiving plate and attached to the anchor block on the vehicle side, and transmitting the braking torque received by the torque receiving plate to the anchor block; (For example, refer to Patent Document 1).

In the case of railway vehicles, since the size is increased, a split type disc brake friction material assembly composed of a plurality of friction material assemblies arranged in series in the circumferential direction of the disk rotor has been proposed. ing.
In this case, each friction material assembly includes a torque receiving plate that receives a braking torque acting on the friction material by attaching the friction material pressed against the disk rotor to the front side, and an anchor fixed to the back surface of the torque receiving plate. Plate.
Then, among the friction material assemblies arranged in series, the anchor plate of the disk brake friction material assembly positioned downstream in the rotational direction of the disk rotor comes into contact with the anchor block fixed to the vehicle body, and the disk rotor The braking torque acting on the friction material assembly positioned on the upstream side in the rotation direction is transmitted to the anchor block via the friction material assembly adjacent to the downstream side.

Utility Model Registration No. 2564497

  By the way, in the case of a conventional split type disc brake friction material assembly composed of a plurality of friction material assemblies arranged in series in the circumferential direction of the disk rotor, the friction material assemblies adjacent to each other in the serial arrangement state are mutually connected. Because the anchor plate is aligned with the edge of the torque receiving plate and the ends are brought into contact with each other, the anchor plates of the respective assemblies may not meet each other depending on the dimensional tolerance and assembly error of each friction material assembly. Before the contact, the torque receiving plates may come into contact with each other. In such a case, the braking torque input to the friction material assembly located on the upstream side in the rotation direction of the disk rotor may cause the rotation direction of the disk rotor. There is a problem that the torque is transmitted to the torque receiving plate of the friction material assembly adjacent to the downstream side.

  As a result, the torque receiving plate of the friction material assembly positioned downstream in the rotational direction of the disk rotor additionally receives the braking torque received by the friction material assembly positioned upstream in the rotational direction of the disk rotor. In the friction material assembly located on the downstream side, an excessive load is applied to the coupling means between the torque receiving plate and the anchor plate, the durability of the friction material assembly is reduced, or the rivet or the coupling means is used. There was a possibility of causing a serious trouble such as breakage of the welded portion.

  An object of the present invention is to solve the above problems, and in each friction material assembly arranged in series in the circumferential direction of the disk rotor, the torque receiver of the friction material assembly positioned downstream in the rotation direction of the disk rotor. The brake torque received by the friction material assembly positioned upstream in the rotational direction of the disk rotor is not input to the plate. Therefore, the durability of the friction material assembly due to an excessive load and the coupling of rivets, etc. It is an object of the present invention to provide a disc brake friction material assembly capable of avoiding problems such as breakage of means.

The above object is achieved by the following configuration.
(1) A disc brake friction material assembly according to the present invention includes a plurality of friction material assemblies arranged in series in the circumferential direction of the disc rotor,
Each friction material assembly includes a torque receiving plate that receives a braking torque acting on the friction material, and an anchor plate fixed to the back surface of the torque receiving plate,
A split-type disc brake friction material assembly in which the anchor plate abuts against an anchor block fixed to a vehicle body and the braking torque is transmitted to the anchor block;
The friction material assemblies adjacent to each other in the serial arrangement state are characterized in that the end portions of the anchor plates are attached so as to protrude from the end portions of the torque receiving plate.

In the disc brake friction material assembly described above, the friction material assemblies adjacent to each other in the serial arrangement state are in contact with the end portions of the anchor plates that are attached to protrude from the end portions of the torque receiving plate, Since the torque receiving plates are separated from each other, the braking torque applied to the torque receiving plate of the friction material assembly positioned upstream in the rotation direction of the disk rotor is adjacent to the downstream side from the anchor plate of the friction material assembly. Is transmitted to the anchor plate of the friction material assembly, and is not transmitted to the torque receiving plate of the friction material assembly on the downstream side.
Accordingly, in each friction material assembly arranged in series in the circumferential direction of the disk rotor, the torque receiving plate of the friction material assembly positioned downstream in the rotation direction of the disk rotor is disposed upstream of the rotation direction of the disk rotor. The braking torque received by the positioned friction material assembly is not input, and problems such as a decrease in durability due to an excessive load and damage to the coupling means, which may occur in the downstream friction material assembly, can be avoided. .

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a disc brake friction material assembly according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of a first embodiment of a friction material assembly for a disc brake according to the present invention, FIG. 2 is a view as viewed from an arrow A in FIG. 1, and FIG.

  A disc brake friction material assembly 1 shown in FIG. 1 is used in a disc brake device for a railway vehicle, and is arranged in series along a circumferential direction of a disc rotor (not shown) fixed to an axle. This is a split type disc brake friction material assembly constituted by two friction material assemblies 3A and 3B.

  Each of the friction material assemblies 3A and 3B has a structure opposite to each other, and friction materials (friction pads) 5A and 5B that are pressed against the disk rotor are assembled on the front surface side so that braking torque acting on the friction materials 5A and 5B is applied. Torque receiving plates 7A and 7B for receiving, and anchor plates 9A and 9B fixed to the back surfaces of the torque receiving plates 7A and 7B are provided.

  In the case of the present embodiment, the torque receiving plates 7A and 7B are back plates fixed to the back surfaces of the friction materials 5A and 5B, and the outer shape is set larger than the friction materials 5A and 5B. The outer peripheral edges of the torque receiving plates 7A and 7B are formed so as to protrude outward from the friction materials 5A and 5B over the entire circumference of 5B.

The anchor plates 9A and 9B are fixed and integrated on the back surfaces of the torque receiving plates 7A and 7B by six spot welds 11.
The spot welding 11 has a welding area set so that a necessary bond strength can be obtained.

  Assuming that the rotation direction of the disk rotor is the arrow X direction in FIG. 1, among the friction material assemblies 3A and 3B arranged in series, the anchor plate 9A of the friction material assembly 3A located on the downstream side in the rotation direction of the disk rotor. Is abutted against the anchor block 13 fixed to the vehicle body, and the braking torque acting on the friction material assembly 3B on the upstream side in the rotation direction of the disc rotor is applied to the anchor block 13 via the friction material assembly 3A adjacent on the downstream side. Is transmitted to.

  In the friction material assembly 1 for disc brake according to the present embodiment, the friction material assemblies 3A and 3B adjacent to each other in the serial arrangement state, as shown in FIG. 7B is attached to the torque receiving plates 7A and 7B by projecting by a dimension L from the end of 7B, the ends of the anchor plates 9A and 9B are in contact with each other, and the torque receiving plates 7A and 7B are separated by a distance of 2L. Only separated.

  The dimension L is appropriately set so that the end portions of the anchor plates 9A and 9B do not enter the inner side of the torque receiving plates 7A and 7B even if dimensional tolerances, assembly errors, and the like are accumulated. .

  In the disc brake friction material assembly 1 described above, the friction material assemblies 3A and 3B adjacent to each other in the serial arrangement state are the ends of the anchor plates 9A and 9B protruding from the end portions of the torque receiving plates 7A and 7B. Since the parts are in contact with each other and the torque receiving plates 7A and 7B are separated from each other, the braking torque applied to the torque receiving plate 7B of the friction material assembly 3B located on the upstream side in the rotational direction of the disk rotor is It is transmitted to the anchor plate 9A of the friction material assembly 3A adjacent to the downstream side, and is not transmitted to the torque receiving plate 7A of the friction material assembly 3A on the downstream side.

  Accordingly, in each of the friction material assemblies 3A and 3B arranged in series in the circumferential direction of the disk rotor, the rotation of the disk rotor is applied to the torque receiving plate 7A of the friction material assembly 3A located downstream in the rotation direction of the disk rotor. The braking torque received by the friction material assembly 3B located on the upstream side in the direction is no longer input, resulting in a decrease in durability due to an excessive load that may occur in the downstream friction material assembly 3A, and the torque receiving plate and anchor The problem that the connecting means such as a rivet for fixing the plate is broken can be avoided, and the durability as the disc brake friction material assembly 1 can be improved.

  4 is a front view of a second embodiment of a disc brake friction material assembly according to the present invention, FIG. 5 is a rear view of the disc brake friction material assembly shown in FIG. 4, and FIG. 7 is a sectional view taken along the line DD of FIG. 4, FIG. 8 is a perspective view of the friction material assembly shown in FIG. 5 with the anchor plate and the torque receiving plate removed, and FIG. 5 is a cross-sectional view taken along line EE in FIG. 5, and FIG. 10 is a cross-sectional view taken along line FF in FIG.

  The disc brake friction material assembly 21 shown in FIG. 4 is also a two-part type disc brake friction material assembly used in a disc brake device for railway vehicles, and is a disc rotor (not shown) fixed to the axle. It is comprised by the two friction material assemblies 23A and 23B arrange | positioned in series along the circumferential direction.

  Each of the friction material assemblies 23A and 23B has an opposite structure, and a friction material (friction pad) 25 that is pressed against the disk rotor is assembled on the front side to receive a braking torque that acts on the friction material 25. Receiving plates 27A and 27B and anchor plates 29A and 29B fixed to the back surfaces of the torque receiving plates 27A and 27B are provided.

  In the case of the present embodiment, the anchor plates 29A and 29B are coupled and integrated with the torque receiving plates 27A and 27B by six rivets 31.

In the case of the present embodiment, the friction material 25 has a disk shape, and is incorporated in the form of a pad assembly 42 in which a similar disk-shaped back plate 41 is joined to the back surface as shown in FIG.
Guide plates 45A and 45B for holding the pad assembly 42 are fixedly mounted on the torque receiving plates 27A and 27B by rivets 47 on the front side of the torque receiving plates 27A and 27B.

Each guide plate 45A, 45B has five circular pad mounting holes 51 into which the pad assembly 42 is fitted.
The five pad assemblies 42 incorporated in each guide plate 45A, 45B are divided into two groups of two and three by two link plates 53, 54 as shown in FIG. Is done.

  Each of the link plates 53 and 54 is formed at a position away from the center of the back plate 41 and a convex spherical portion 56 that contacts the center of the back plate 41 of each pad assembly 42 as shown in FIGS. And an engaging claw 58 that fits into the engaging hole 57. Further, the link plates 53 and 54 have their rear surfaces in contact with the torque receiving plates 27A and 27B, so that displacement in the plate thickness direction is restricted.

The pad assemblies 42 assembled to the guide plates 45A and 45B are supported by the convex spherical portions 56 of the link plates 53 and 54 coming into contact with the back surfaces thereof, so that the axial position of the disk rotor is regulated. At the same time, the swingability (swinging motion in the direction indicated by the arrow Y in FIG. 7) that follows the undulation caused by thermal distortion of the disk rotor is ensured.
Furthermore, each pad assembly 42 is restricted from rotating as indicated by an arrow Z in FIG. 4 because the engaging claw 58 is fitted in the engaging hole 57.

  Compared with the friction material assemblies 3A and 3B shown in FIG. 1, the friction material assemblies 23A and 23B of the present embodiment swing the friction material 25 via the guide plates 45A and 45B and the link plates 53 and 54. Since it is supported movably, even if undulation due to thermal deformation occurs on the surface of the disk rotor, each friction material 25 can follow the undulation and maintain good contact with the disk rotor. The braking performance does not deteriorate due to the undulation of the disk rotor.

  In the case of the friction material assemblies 23A and 23B of the present embodiment, as in the case of the first embodiment, if the rotation direction of the disk rotor is the direction of the arrow X in FIG. 4 and FIG. Of the arranged friction material assemblies 23A and 23B, the anchor plate 29A of the friction material assembly 23A located on the downstream side in the rotation direction of the disk rotor comes into contact with the anchor block 13 fixed to the vehicle body, thereby The braking torque acting on the friction material assembly (in this embodiment, the friction material assembly 23B) located on the upstream side in the rotation direction is applied to the anchor block 13 via the friction material assembly 23A adjacent to the downstream side. Communicated.

  Also in the case of this disc brake friction material assembly 21, the friction material assemblies 23A and 23B adjacent in the serial arrangement state are dimensioned more than the ends of the torque receiving plates 27A and 27B as shown in FIG. The end portions of the anchor plates 29A and 29B, which are attached with protruding edges by L, contact each other, and the torque receiving plates 27A and 27B are separated from each other by a distance of 2L.

  The dimension L is appropriately set so that the end portions of the anchor plates 29A and 29B do not enter the inner side of the torque receiving plates 27A and 27B even if dimensional tolerances, assembly errors, and the like are accumulated. .

  Therefore, also in the case of the disc brake friction material assembly 21 of the second embodiment, the friction material assemblies 23A and 23B adjacent in the serial arrangement state protrude from the end portions of the torque receiving plates 27A and 27B. Since the end portions of the anchor plates 29A and 29B are in contact with each other and the torque receiving plates 27A and 27B are separated from each other, they act on the torque receiving plate 27B of the friction material assembly 23B on the upstream side in the rotational direction of the disk rotor. The braking torque thus transmitted is transmitted to the anchor plate 29A of the friction material assembly 23A adjacent to the downstream side, and is not transmitted to the torque receiving plate 27A of the friction material assembly 23A on the downstream side.

  Accordingly, in each of the friction material assemblies 23A and 23B arranged in series in the circumferential direction of the disk rotor, the disk rotor rotates on the torque receiving plate 27A of the friction material assembly 23A located on the downstream side in the rotation direction of the disk rotor. The braking torque received by the friction material assembly 23B positioned upstream in the direction is not input, and the durability is reduced due to an excessive load that may occur in the downstream friction material assembly 23A, and the torque receiving plate and the anchor The problem that the connecting means such as a rivet for fixing the plate is broken can be avoided, and the durability as the disc brake friction material assembly 21 can be improved.

1 is a front view of a first embodiment of a friction material assembly for a disc brake according to the present invention. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is a front view of 2nd Embodiment of the friction material assembly for disk brakes which concerns on this invention. It is a rear view of the friction material assembly for disk brakes shown in FIG. FIG. 5 is a view taken in the direction of arrow C. It is DD sectional drawing of FIG. FIG. 6 is a perspective view of the friction material assembly shown in FIG. 5 with an anchor plate and a torque receiving plate removed. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc brake friction material assembly 3A, 3B Friction material assembly 5A, 5B Friction material 7A, 7B Torque receiving plate 9A, 9B Anchor plate 11 Spot welding 13 Anchor block 21 Friction material assembly 23A, 23B Friction material Assembly 25 Friction material 27A, 27B Torque receiving plate 29A, 29B Anchor plate 31 Rivet 41 Back plate 42 Pad assembly 45A, 45B Guide plate 47 Rivet 51 Pad mounting hole 53, 54 Link plate 56 Convex spherical portion 57 Engagement hole 58 Locking claw

Claims (1)

Consists of a plurality of friction material assemblies arranged in series in the circumferential direction of the disk rotor,
Each friction material assembly includes a torque receiving plate that receives a braking torque acting on the friction material, and an anchor plate fixed to the back surface of the torque receiving plate,
A split-type disc brake friction material assembly in which the anchor plate abuts against an anchor block fixed to a vehicle body and the braking torque is transmitted to the anchor block;
Friction material assembly for disc brake, wherein friction member assemblies adjacent to each other in series arrangement are in contact with the ends of the anchor plates protruding from the ends of the torque receiving plates. Solid.

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