Front wheel disc brake assembly

Abstract

The utility model discloses a front wheel disc brake assembly of a low-speed electric motorcycle. The front wheel disc brake assembly comprises a clamping embedded part connected with a shock absorber cylinder barrel and a brake disc connected with a hub. Hydraulic cavities and built-in pistons are symmetrically arranged in the clamping embedded part; an open slot is formed in the middle of the clamping insert; the guide pin penetrates through the open slot; brake pads are arranged on two sides of the open slot; elastic sheets are sleeved between the brake pads and the guide pins; arc-shaped air guide grooves (extending from the inner hole wall to the outer peripheral wall) and heat dissipation holes are formed in the end faces of the two sides of the brake disc; the elastic piece comprises an inverted-V-shaped bouncing part and a positioning part with a T-shaped positioning plate and an elastic positioning strip, and the brake pad and the piston are pushed to make synchronous contact or be separated through elastic force. The opening groove is provided with a guide groove and a dustproof cover. The heat dissipation efficiency is improved through the air guide grooves and the heat dissipation holes, and overheating aging of the brake disc is avoided; the elastic piece structure ensures synchronous action of the brake pad, brake delay is eliminated, and safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste paper cleaning structure on drum type die cutting machine, concretely relates to a front wheel disc brake assembly. BACKGROUND

[0002] The front wheel disc brake system of low-speed electric motorcycle usually realizes braking through the clamping of disc by the single piston in the caliper pushing the brake pads on both sides. In the prior art, the heat dissipation of disc brake system mainly depends on the ordinary through hole on the brake disc, the heat dissipation efficiency is low, the brake disc is easy to overheat during continuous braking, which leads to rapid aging and wear, shortening the service life. In addition, the brake pads on both sides are independently pushed by the respective pistons, which is easy to cause the phenomenon that the brake pads on both sides cannot be clamped or separated synchronously, resulting in brake delay and affecting driving safety. Therefore, there is an urgent need for a disc brake assembly with high heat dissipation and synchronous braking functions. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model aims to solve two problems: (1) the problem of overheating aging caused by low heat dissipation efficiency of the brake disc; (2) the problem of brake delay caused by the fact that the brake pads on both sides cannot be clamped or separated synchronously.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a front wheel disc brake assembly, comprising a clamping embedded with a shock absorber cylinder and a brake disc connected with a wheel hub; two symmetrical hydraulic cavities are arranged in the clamping embedded, and a piston is installed in the hydraulic cavity; an open slot is formed in the middle of the clamping embedded for the circumferential wall of the brake disc, a guide pin is fixed on the clamping embedded, and the guide pin passes through the open slot; brake pads are arranged on both sides of the open slot, and the brake pads are in sliding cooperation with the guide pin, characterized in that: arc-shaped air guide grooves are arranged on the end faces of the brake disc, the air guide grooves extend from the inner hole wall of the brake disc to the outer circumferential wall, and the air guide grooves are provided with heat dissipation holes; a spring sheet is arranged between the brake pad and the guide pin, the spring sheet is positioned and installed in the open slot and drives the brake pad to contact the adjacent piston, a guide groove with a width adapted to the brake pad is formed in the inner wall of the open slot, and a dust cover is arranged above the open slot.

[0005] The spring sheet comprises a reverse "V"-shaped spring opening part and a positioning part connected with the middle part of the spring opening part; the two sides of the spring opening part are spring opening plates, the spring opening plates are provided with sleeve holes for sleeving the guide pin, and the lower end is provided with an "n"-shaped push bar; the positioning part comprises a "T"-shaped positioning plate connected with the spring opening part and an elastic positioning strip integrally formed with the end part of the "T"-shaped positioning plate, the elastic positioning strip is bent downward, and the end part is provided with an "L"-shaped back plate; when the spring sheet is placed in the open slot, the push bar of the spring opening plate is in contact with the brake pad, the "T"-shaped positioning plate of the positioning part is in contact with the groove wall on one side of the open slot, and the back plate of the elastic positioning strip is in elastic abutment with the groove wall on the other side of the open slot.

[0006] The heat dissipation holes are circular or elliptical and are uniformly distributed along the length direction of the air guide groove.

[0007] The cross section of the guide groove is rectangular.

[0008] The dustproof cover is buckled on the card-embedded peripheral wall and is made of polyamide.

[0009] The utility model discloses the beneficial effect is:

[0010] 1, efficient heat dissipation: the arc air guide groove of brake disc extends from the inner hole wall to the outer peripheral wall, and cooperates with the heat dissipation hole in the air guide groove, when the wheel drives the brake disc to rotate, airflow flows along the air guide groove and is discharged through the heat dissipation hole, significantly improves the heat dissipation efficiency, avoids brake disc overheat aging, prolongs the service life.

[0011] 2, synchronous braking: the inverted "V" shape of elastic sheet opens the department and pushes two sides brake pad and corresponding piston synchronous contact or separation through the elastic force, eliminates the delay of braking, improves the braking response speed and safety.

[0012] 3, guide stability: the guide groove in the open slot can constrain the left and right swing of brake disc, guarantee the contact precision of brake pad and brake disc, the dustproof cover prevents dust from entering, reduces the wear of parts. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the perspective view of the embodiment of the utility model;

[0014] Figure 2 It is the explosion drawing of the embodiment of the utility model;

[0015] Figure 3 It is the perspective view of the brake disc in the embodiment of the utility model.

[0016] Figure 4 It is the perspective view of the elastic sheet in the embodiment of the utility model.

[0017] Mark explanation: 1-card embeds;2-brake disc;3-hydraulic chamber;4-piston;5-open slot;6-guide pin;7-brake pad;8-elastic sheet;81-elastic sheet opens the department;82-positioning part;83-elastic sheet opens the board;821-T-shaped positioning board;822-elastic positioning strip;823-lean board;84-pull strip;9-air guide groove;10-heat dissipation hole;12-dustproof cover;20-shock absorber cylinder. DETAILED DESCRIPTION

[0018] The utility model will be specifically described below through examples, only for further illustrating the utility model, can not be understood as the limitation of the protection scope of the utility model.

[0019] As Figure 1 — Figure 4As shown, the embodiment discloses a front wheel disc brake assembly, which comprises a clamping 1 and a brake disc 2. The clamping 1 is fixedly connected with the shock absorber cylinder 20 by bolts, and two hydraulic cavities 3 are symmetrically processed inside the clamping 1, and a piston 4 is slidingly installed in each hydraulic cavity 3. An open slot 5 is formed in the middle of the clamping 1, and the peripheral wall of the brake disc 2 extends into the open slot 5 and is fixedly connected with the hub.

[0020] A guide pin 6 is fixed along the length direction of the clamping 1, penetrates through the open slot 5, and is in interference fit with the clamping 1 at both ends. Brake pads 7 are arranged on both sides of the open slot 5, and the brake pads 7 are slidingly sleeved on the guide pin 6 through sleeve holes. A spring 8 is installed between the brake pad 7 and the guide pin 6. The spring opening part 81 of the spring 8 is in inverted “V” shape, the sleeve holes of the spring opening plate 83 on both sides of the spring opening part 81 are sleeved on the guide pin 6, the lower end “n” shaped lever 84 of the spring opening plate 83 is elastically opened and in contact with the side surface of the brake pad 7; the “T” shaped positioning plate 821 on one side of the positioning part 82 is in contact with the left slot wall of the open slot 5, and the other side elastic positioning strip 822 is bent downward, and the “L” shaped abutment plate 823 at the end thereof is elastically abutted against the right slot wall of the open slot 5, so that the spring 8 is positioned in the open slot, and the spring 8 exerts symmetrical elastic thrust on the brake pads 7 on both sides.

[0021] Arc-shaped air guide grooves 9 are processed on both end faces of the brake disc 2 and are circumferentially and uniformly distributed. The air guide grooves 9 extend in arc shape from the inner hole wall to the outer peripheral wall, and circular heat dissipation holes 10 (diameter 2-3 mm) are formed in the grooves.

[0022] The inside wall of the open slot 5 is provided with a guide groove, which can constrain the left and right swing of the brake pad 7 to be less than or equal to 0.5 mm, and ensure the parallelism of the brake pad 7 and the brake disc 2. A dust cover 12 (made of engineering plastic) is connected to the open slot 5 through buckling, which prevents mud and dust from entering the gap between the hydraulic cavity 3 and the guide pin 6.

[0023] When braking, the hydraulic oil enters the hydraulic cavity 3 to push the piston 4, the piston 4 contacts the brake pad 7 and compresses the spring 8, and the brake pads 7 on both sides synchronously clamp the brake disc 2 to realize braking; when the brake is released, the elastic restoring force of the spring 8 pushes the brake pad 7 and the piston 4 to synchronously separate, and eliminates the delay.

[0024] After the above technical scheme is adopted, the following technical effects can be achieved:

[0025] 1. Efficient heat dissipation: The arc-shaped air guide grooves of the brake disc extend from the inner hole wall to the outer peripheral wall, and cooperate with the heat dissipation holes in the air guide grooves. When the wheel drives the brake disc to rotate, the airflow flows along the air guide grooves and is discharged through the heat dissipation holes, which significantly improves the heat dissipation efficiency, avoids overheating and aging of the brake disc, and prolongs the service life.

[0026] 2、Synchronous braking: The inverted "V" shape of the spring plate pushes the two brake pads on both sides to contact or separate from the corresponding piston synchronously through elastic force, eliminating braking delay, improving braking response speed and safety.

[0027] 3、Stable guidance: The guide groove in the open slot can constrain the left and right swing of the brake disc, ensuring the contact accuracy of the brake pad and the brake disc; the dust cover prevents dust from entering and reduces component wear.

Claims

1. A front wheel disc brake assembly, comprising a retaining clip (1) connected to a shock absorber cylinder and a brake disc (2) connected to a wheel hub; two hydraulic chambers (3) are symmetrically arranged inside the retaining clip (1), and pistons (4) are installed inside the hydraulic chambers (3); an opening groove (5) is provided in the middle of the retaining clip (1) for inserting the peripheral wall of the brake disc (2), and a guide pin (6) is fixed on the retaining clip (1), the guide pin (6) passing through the opening groove (5); brake pads (7) are respectively arranged on both sides of the opening groove (5), and the brake pads (7) slide in cooperation with the guide pin (6), characterized in that: The brake disc (2) is provided with arc-shaped air guide grooves (9) uniformly distributed on both sides of the end surface, the air guide grooves (9) extend from the inner hole wall of the brake disc (2) to the outer peripheral wall, and the air guide grooves (9) are provided with heat dissipation holes (10) therein; the brake pad (7) and the guide pin (6) are sleeved with a spring sheet (8), the spring sheet (8) is positioned and installed in the open slot (5) and drives the brake pad (7) to contact the adjacent piston (4), the inner side wall of the open slot (5) is provided with a guide groove with a width adapted to the brake pad (7), and the open slot (5) is provided with a dust cover (12) above.

2. The front wheel disc brake assembly of claim 1, wherein: The spring sheet (8) comprises a "V"-shaped spring opening part (81) and a positioning part (82) connected to the middle part of the spring opening part (81); the spring opening part (81) is provided with spring opening plates (83) on both sides, the spring opening plates (83) are provided with sleeve holes sleeving the guide pin (6), and the lower end is provided with an "n"-shaped push bar (84); the positioning part (82) comprises a "T"-shaped positioning plate (821) connected to the spring opening part (81) and an elastic positioning strip (822) integrally formed with the end part of the "T"-shaped positioning plate (821), the elastic positioning strip (822) is downwardly bent, and the end part is provided with an "L"-shaped abutting plate (823); when the spring sheet (8) is placed in the open slot (5), the push bar (84) of the spring opening plate (83) contacts the brake pad (7), the "T"-shaped positioning plate (821) of the positioning part (82) contacts the groove wall on one side of the open slot (5), and the abutting plate (823) of the elastic positioning strip (822) elastically abuts against the groove wall on the other side of the open slot (5).

3. The front wheel disc brake assembly of claim 1, wherein: The heat dissipation holes (10) are circular or elliptical and are uniformly distributed along the length direction of the air guide groove (9).

4. The front wheel disc brake assembly of claim 1, wherein: The dust cover (12) is buckle-connected to the peripheral wall of the clamping (1), and is made of polyamide.

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