Rear brake of anti-friction disc

Abstract

The rear brake comprises a brake disc and a brake movable plate, the brake disc is connected with a main shaft through a spline, the main shaft is provided with a spline part in the axial direction, the spline part is provided with a plurality of first spline teeth in the circumferential direction, the brake disc is provided with a spline hole, and the brake movable plate is provided with a plurality of second spline teeth in the circumferential direction. A plurality of first spline teeth are arranged in the spline hole, a plurality of second spline teeth meshed with the first spline teeth are arranged in the spline hole, at least two annular grooves are formed in the spline part, and an elastic O-shaped ring is arranged in each groove. The utility model has the beneficial effects that the two V-shaped grooves are additionally arranged on the main shaft, the O-shaped rings made of wear-resistant rubber are placed in the grooves, and then the brake disc is sleeved in the grooves, so that the two O-shaped rings form elastic support for the brake disc, and when the main shaft rotates, the swing caused by a gap between spline teeth is reduced, and the noise generated by disc wiping is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a rear brake for an anti-friction disc used in traction machines. Background Technology

[0002] Rear-mounted brake discs commonly produce a rubbing sound, resulting in significant overall machine noise. Research revealed that current brake discs are mounted on the spindle via a spline connection. The spline teeth are involute teeth, and due to manufacturing precision issues, the teeth do not always mesh perfectly. Consequently, the brake disc is prone to wobbling during rotation, leading to rubbing noise. Utility Model Content

[0003] The purpose of this utility model is to provide a rear brake for an anti-friction disc that solves or partially solves the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A rear brake for a rubbing disc includes a brake disc and a brake moving plate. The brake disc is connected to a main shaft via a spline. The main shaft has a spline portion along the axial direction, and the spline portion has a plurality of first spline teeth along the circumferential direction. The brake disc has a spline hole, and the spline hole has a plurality of second spline teeth that mesh with the first spline teeth. The spline portion has at least two annular grooves, and each groove contains an elastic O-ring.

[0006] Preferably, the O-ring is made of wear-resistant rubber.

[0007] Preferably, the distance between the top of the second spline tooth and the bottom of the first spline tooth is denoted as N, and the thickness of the O-ring is 1.2N to 1.5N.

[0008] Preferably, the two grooves are located on both sides of the brake disc, and the distance between them and the edge of the brake disc is 1 to 5 cm.

[0009] Preferably, the groove is a V-shaped groove, and the width of the bottom of the groove is 1.1 to 1.3 times that of the O-ring.

[0010] Preferably, the brake disc is made of aluminum and the spindle is made of steel.

[0011] The beneficial effects of this invention are as follows: Two V-shaped grooves are added to the main shaft, and wear-resistant rubber O-rings are placed inside these grooves before the brake disc is fitted. This allows the two O-rings to provide elastic support to the brake disc, reducing wobbling caused by the gap between the spline teeth during main shaft rotation and lowering noise from the rubbing disc. The V-shaped groove structure allows the O-rings to deform under pressure, further reducing friction during the brake disc's forward and backward movement. The spacing between the top of the second spline tooth and the bottom of the first spline tooth reduces the stress on the O-rings, increasing their lifespan. Furthermore, the V-shaped grooves are located on the main shaft rather than the brake disc because the main shaft is made of steel, while brake discs are mostly made of aluminum, thus avoiding any reduction in the brake disc's strength. Attached Figure Description

[0012] Figure 1 This is a partial cross-sectional structural schematic diagram of the present invention;

[0013] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0015] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figure 1 and Figure 2 As shown, the rear brake of the anti-friction disc of this utility model includes a brake disc 10 and a brake moving plate 12. The brake disc 10 is attracted to the brake moving plate 12, forming rotational friction to achieve the purpose of braking. The brake disc 10 is connected to the main shaft 14 via a spline, and the main shaft 14 is provided with a spline portion along the axial direction. The spline portion is provided with a plurality of first spline teeth 16 along the circumferential direction. The brake disc 10 is provided with a spline hole (not shown), and a plurality of second spline teeth 18 that mesh with the first spline teeth 16 are provided in the spline hole. This is a common spline structure, so it is not shown in detail. The spline portion is provided with two annular grooves 20, and each groove 20 is provided with an elastic O-ring 22. The O-ring 22 is made of wear-resistant rubber, which can be deformed under pressure and can also withstand a certain pressure.

[0017] The distance between the top of the second spline tooth 18 and the bottom of the first spline tooth 16 is denoted as N, and the thickness of the O-ring 22 is 1.2N to 1.5N. This design causes the O-ring 22 to be locally compressed, reducing the amount of pressure it experiences and increasing its service life.

[0018] The two grooves 20 are located on both sides of the brake disc 10, and the distance between them and the edge of the brake disc 10 is 1 to 5 cm.

[0019] The groove 20 is a V-shaped groove that is narrow at the bottom and wide at the top. The width of the bottom of the groove 20 is 1.1 to 1.3 times that of the O-ring 22. Its design is to allow the O-ring 22 to have better deformation space when it is compressed, reduce the compression on the brake disc 10, and reduce the friction when the brake disc 10 moves axially.

[0020] The brake disc 10 is made of aluminum, and the spindle 14 is made of steel.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rear brake for preventing a disk from being scratched, comprising a brake disk and a brake shoe, the brake disk being connected to a main shaft by means of a spline, characterized in that, The main shaft is provided with a spline part in the axial direction, the spline part is provided with a plurality of first spline teeth in the circumferential direction, the brake disc is provided with a spline hole, the spline hole is provided with a plurality of second spline teeth which are engaged with the first spline teeth, the spline part is provided with at least two annular grooves, and each groove is provided with a resilient O-shaped ring.

2. A rear-mounted skid-preventing brake according to claim 1, characterized in that The O-shaped ring is made of wear-resistant rubber.

3. A rear-mounted skid-preventing brake according to claim 1, characterized in that The distance between the top of the second spline tooth and the bottom of the first spline tooth is N, and the thickness of the O-shaped ring is 1.2N-1.5N.

4. A rear-mounted skid-preventing brake according to claim 1, characterized in that The two grooves are respectively located on the two sides of the brake disc, and the distance between the edge of the brake disc and the groove is 1-5cm.

5. A rear-mounted skid-preventing brake according to claim 1, characterized in that The groove is a V-shaped groove, and the width of the bottom of the groove is 1.1-1.3 times the width of the O-shaped ring.

6. A rear-mounted skid-preventing brake according to claim 1, characterized in that The brake disc is made of aluminum, and the main shaft is made of steel.

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