Composite brake shoe with novel structure

Abstract

The composition brake shoe with the novel structure comprises a wheel brake shoe (1), and is characterized in that the wheel brake shoe (1) is provided with a shoe back (11) and a friction body (10). According to the structure, the thickness of the friction body is increased, the effective abrasion thickness of the composition brake shoe is increased, and the service life is prolonged; a back plate and a friction material are added at the nose of the brake shoe, so that the effective friction area of the brake shoe is increased, the abrasion loss of the brake shoe is reduced, and the service life is prolonged; a slot is formed in the middle of the friction body, so that internal stress of the brake shoe can be released, and middle cracks are prevented; deformation of the upper and lower parts is facilitated, and attachment of the brake shoe and a wheel is accelerated; the wheel impact force borne by the brake shoe during braking is effectively reduced through deformation, and the stress condition of the contact face of the brake shoe and the tread is improved. The protruding height of the material grabbing claw is greatly reduced, the effective abrasion thickness of the brake shoe is increased on the basis that the bonding strength of the friction body and the shoe back meets the requirement, and therefore the service life of the brake shoe is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of railway vehicle braking, in particular to a synthetic brake shoe with a new structure. Background Art

[0002] The new high friction coefficient synthetic material brake shoe for railway freight cars is an important part of the railway freight car braking system and is also the actuator that finally applies the braking force. The synthetic brake shoe is widely used and has the characteristics of good wear resistance, high friction coefficient and reliable braking.

[0003] However, in actual applications, it was found that during the operation of railway freight cars, the actual service life of synthetic brake shoes was shorter than the design life due to eccentric wear, brake sticking, metal inlay and other reasons, which did not meet the current trend of extending maintenance intervals and reducing operating costs. Summary of the invention

[0004] In order to overcome the existing defects, the present invention proposes a synthetic brake shoe with a new structure.

[0005] A composite brake shoe with a novel structure comprises a wheel brake shoe. The wheel brake shoe is provided with a shoe back and a friction body.

[0006] The thickness of the friction body is 50 to 52 mm.

[0007] Among them, a 4mm wide gap is set in the center of the tile back.

[0008] Among them, a material grabbing claw is arranged on the inner side of the tile back, and the tile back is connected to the friction body through the material grabbing claw.

[0009] The protruding height of the material grabbing claws is 6 to 10 mm, and the number of the material grabbing claws is multiple.

[0010] Wherein, a groove with a width of 2 to 4 mm is arranged at the gap of the middle part of the friction body corresponding to the tile back.

[0011] Preferably, four evenly distributed material grabbing claws are provided on the upper and lower parts of the tile back, for a total of eight claws.

[0012] Adding friction material to the original shoe nose increases the effective friction area of ​​the brake shoe and further extends the service life of the brake shoe.

[0013] A 2-4 mm gap is cut between the shoe back and the friction body with a cutting machine to speed up the fitting of the brake shoe and the wheel. The brake shoe itself is a poor conductor of heat, and friction heat will cause thermal decay of the brake shoe. Opening a groove in the middle can effectively reduce the temperature rise of the brake shoe, so that the friction coefficient of the brake shoe is more stable during braking. Cutting a gap in the middle is conducive to the release of internal stress of the brake shoe and prevents the occurrence of cracks in the middle; it is also conducive to the deformation of the upper and lower parts, so as to better fit the wheel.

[0014] There are 8 material grabbing claws on the shoe back. When the brake shoe is pressed, the material grabbing claws are embedded in the friction body, which can improve the bonding force between the friction body and the shoe back. Compared with the existing structure, the height of the material grabbing claws is appropriately reduced. On the basis that the bonding strength between the friction body and the shoe back meets the requirements, the effective wear thickness of the brake shoe can be increased and the service life can be extended.

[0015] The application introduces a new type of synthetic brake shoe structure, which increases the use thickness of the brake shoe friction body and extends the service life; effectively reduces the impact force on the brake shoe during braking, improves the force on the contact surface between the brake shoe and the tread, and makes the brake shoe fit better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a new type of synthetic brake shoe.

[0017] Figure 2 Schematic diagram of brake shoe structure. DETAILED DESCRIPTION

[0018] A synthetic brake shoe with a novel structure provided by the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1-2 As shown, a composite brake shoe with a novel structure comprises a wheel brake shoe 1 , wherein the wheel brake shoe 1 is provided with a shoe back 11 and a friction body 10 .

[0020] The friction body 10 has a thickness of 50-52 mm.

[0021] A 4 mm wide gap 13 is provided in the center of the tile back 11 .

[0022] A material grabbing claw 12 is disposed inside the tile back 11 , and the tile back 11 is connected to the friction body 10 via the material grabbing claw 12 .

[0023] The protruding height of the material grabbing claws 12 is 6-10 mm, and there are multiple material grabbing claws 12.

[0024] A groove 14 with a width of 2 to 4 mm is provided in the middle of the friction body 10 corresponding to the gap 13 of the tile back 11 .

[0025] Four evenly distributed material grabbing claws 12 are respectively arranged on the upper and lower parts of the tile back 11, for a total of eight claws.

[0026] Adding a back plate and friction material to the brake shoe nose increases the effective friction area of ​​the brake shoe, reduces brake shoe wear and extends service life.

[0027] A friction body back plate is added to the shoe nose, and a 4mm wide gap is set in the center. After the brake shoe is pressed, a 2-4mm wide groove is cut in the center of the friction body (corresponding to the gap on the shoe back) with a cutting machine to speed up the fit between the brake shoe and the wheel. This structure is conducive to the release of internal stress of the brake shoe and prevents the occurrence of cracks in the middle; it is conducive to the deformation of the upper and lower parts, speeding up the fit between the brake shoe and the wheel; through deformation, the impact force on the brake shoe during braking is effectively reduced, the force on the contact surface between the brake shoe and the tread is improved, and the brake shoe fits the wheel better.

[0028] Eight claws are set at the bonding part between the shoe back and the friction body. The purpose is to embed the claws into the friction body when the brake shoe is pressed, so as to improve the bonding force between the friction body and the shoe back. Compared with the prototype of synthetic brake shoe, the protrusion height of the claws is greatly reduced. On the basis of the bonding strength between the friction body and the shoe back meeting the requirements, the effective wear thickness of the brake shoe is increased, thereby extending the service life of the brake shoe.

[0029] Compared with traditional brake shoes, the thickness of friction material in the new structure brake shoes is increased to more than 50 mm, increasing the effective wear thickness of the synthetic brake shoes and thus increasing their service life.

[0030] Finally, it should be noted that the above embodiments are only used to describe the technical solution of the present invention rather than to limit the technical method. The present invention can be extended to other modifications, changes, applications and embodiments in application, and therefore all such modifications, changes, applications and embodiments are considered to be within the scope of the present invention.

Claims

1. A composite brake shoe of a novel structure, comprising a wheel brake shoe (1), characterized in that: The wheel brake shoe (1) is provided with a shoe back (11) and a friction body (10), and the friction body (10) has a thickness of 50 to 52 mm; A 4mm wide gap (13) is arranged in the center of the tile back (11); and a 2-4mm wide groove (14) is arranged in the middle of the friction body (10) corresponding to the gap (13) of the tile back (11).

2. The synthetic brake shoe of the novel structure according to claim 1 is characterized in that: A material grabbing claw (12) is arranged on the inner side of the tile back (11), and the tile back (11) is connected to the friction body (10) via the material grabbing claw (12).

3. The synthetic brake shoe of the novel structure according to claim 2 is characterized in that: The protruding height of the material grabbing claws (12) is 6 to 10 mm, and the number of the material grabbing claws (12) is multiple.

4. The synthetic brake shoe of the novel structure according to claim 2 is characterized in that: Four evenly distributed material grabbing claws (12) are respectively arranged on the upper and lower parts of the tile back (11), for a total of eight claws.

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