Wear-resistant rear brake caliper

Abstract

The utility model discloses a wear-resistant rear brake caliper, which relates to the technical field of brake devices and comprises a brake caliper frame, a sinking groove is formed in the middle of the upper part of the surface of the brake caliper frame, three through cavities are uniformly distributed and formed below the inner surface of the sinking groove, and the inner surfaces of the through cavities are fixedly provided with dust filtering nets. A ventilation shell cover is fixedly installed at the position, located on the edge of the sinking groove, of the upper portion of the surface of the brake caliper frame, and a small air blower is fixedly installed on the inner surface of the ventilation shell cover. Compared with an existing common abrasion-resistant rear brake caliper, the abrasion-resistant rear brake caliper has the advantages that the small air blower works synchronously when the whole brake device works, outside cold air is sucked by the small air blower, blown into the sinking groove and blown to the inner side face of the brake caliper frame through the through cavity in the sinking groove, and even after a vehicle is braked and stopped, the small air blower can still work synchronously. And under the condition that the blowing rate of outside air is low, the cooling of the brake disc in the brake caliper frame can be further assisted, and the heat dissipation efficiency of the brake disc is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake devices, in particular to a wear-resistant rear brake caliper. Background Art

[0002] The caliper disc brake is a type of disc brake. Its rotating element is a metal disc that works on the end surface, called a brake disc. The fixed element is a brake pad composed of a friction block with a small working area and its metal backing plate. There are 2 to 4 brake pads in each brake. These brake pads and their actuators are installed in a clamp-shaped bracket across the two sides of the brake disc, collectively called a brake caliper. The brake caliper is an important component of the active safety system of the car, which slows down or stops the car from moving forward.

[0003] For example, the public document with application number 201710286195.4 discloses a brake caliper, which directly threads the inner thread of the brake caliper piston to form a match with the screw rod, thereby eliminating the use of multi-threaded sleeves and components that relatively fix the multi-threaded sleeves and the brake caliper piston in the prior art, so that the automatic compensation of brake clearance function greatly reduces the requirements for the volume of the brake caliper piston, which not only improves the applicability, but also enables the brake caliper piston with a smaller volume to realize the function of automatically compensating for the excess brake clearance; in addition, by setting the connecting hole on the brake caliper piston as a through hole A retaining ring and a plug are arranged in the through hole, which effectively solves the problem of processing internal threads on the brake caliper piston and the problem of how to ensure that the brake caliper piston does not leak oil due to solving the problem of processing internal threads. However, after the brake pad in the brake caliper rubs against the brake disc to slow down or stop the car, the wind force generated will decrease as the speed decreases. After stopping, the brake caliper and brake disc located on the inner side of the wheel hub are exposed to less fresh air from the outside, resulting in the heat generated by the friction between the brake pad and the brake disc on the brake caliper being difficult to dissipate quickly. Simply relying on the air circulation generated during the driving of the car to dissipate heat is not efficient.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a wear-resistant rear brake caliper is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a wear-resistant rear brake caliper to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wear-resistant rear brake caliper, comprising a brake caliper frame, a recessed groove is opened in the middle of the upper surface of the brake caliper frame, three through cavities are evenly distributed below the inner surface of the recessed groove, dust filters are fixedly installed on the inner surfaces of the through cavities, a ventilation shell is fixedly installed at the edge of the recessed groove above the surface of the brake caliper frame, and a small blower is fixedly installed on the inner surface of the ventilation shell.

[0007] Preferably, a cavity is formed on the right inner wall of the surface of the brake caliper frame, and a piston is slidably disposed on the inner surface of the cavity.

[0008] Preferably, the cavity formed after the rear end of the piston is blocked from the cavity is configured as an oil storage cavity, and a first annular groove is provided on the left side of the inner surface of the cavity.

[0009] Preferably, a limit ring is slidably disposed on the inner surface of the first ring groove, and a sealing rubber sleeve is fixedly disposed on the inner side of the limit ring.

[0010] Preferably, the inner surface of the sealing rubber sleeve is tightly fitted and slid with the surface of the piston, and the opening width of the first ring groove is greater than the width of the limiting ring.

[0011] Preferably, a second annular groove is provided on the right side of the inner surface of the cavity, and a sealing ring sleeve is fixedly installed on the inner surface of the second annular groove, and the inner side surface of the sealing ring sleeve is tightly fitted to the piston surface for sliding.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a sink, a through cavity, a dust filter, a ventilation shell and a small blower. The small blower works synchronously when the overall brake device is working. The small blower sucks in external cold air and blows it into the sink, and then blows it to the inner side of the brake caliper frame through the through cavity inside the sink. Even after the vehicle stops braking and the blowing rate of the external air is weak, it can further assist the brake disc inside the brake caliper frame to cool down and improve the heat dissipation efficiency of the brake disc.

[0014] 2. The utility model provides a first ring groove, a limit ring, a sealing rubber sleeve and a sealing ring sleeve. The sealing rubber sleeve utilizes the limit ring and the first ring groove to limit the position, slides left and right on the surface of the piston, follows the extension of the piston, and protects the piston. When the piston retracts, it prevents brake disc debris from adhering to the piston surface and sliding in the cavity to cause wear of the piston, affecting the response speed and propulsion braking ability of the rear brake caliper piston structure, and indirectly improves the wear resistance and service life of the overall structure of the rear brake caliper during use. The sealing ring sleeve can block the hydraulic oil at the maximum extension distance of the piston to prevent hydraulic oil leakage, which causes the piston to be unable to bear force and thus causes brake failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0017] Figure 3 It is a schematic cross-sectional structure diagram of the cavity position of the brake caliper frame of the utility model.

[0018] In the figure: 1. brake caliper frame; 2. sink groove; 3. through cavity; 4. dust filter; 5. ventilation shell; 6. small blower; 7. cavity; 8. piston; 9. oil storage cavity; 10. first ring groove; 11. limit ring; 12. sealing rubber sleeve; 13. second ring groove; 14. sealing ring sleeve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-Figure 3 As shown, a wear-resistant rear brake caliper includes a brake caliper frame 1, a sink groove 2 is opened in the middle of the upper surface of the brake caliper frame 1, three through cavities 3 are evenly distributed below the inner surface of the sink groove 2, and dust filters 4 are fixedly installed on the inner surfaces of the through cavities 3. A ventilation shell 5 is fixedly installed at the edge of the sink groove 2 above the surface of the brake caliper frame 1, and a small blower 6 is fixedly installed on the inner surface of the ventilation shell 5. A cavity 7 is opened on the inner wall on the right side of the surface of the brake caliper frame 1, and a piston 8 is slidably arranged on the inner surface of the cavity 7, and the cavity formed by the rear end of the piston 8 being blocked by the cavity 7 The body is configured as an oil storage cavity 9, and a first annular groove 10 is provided on the left side of the inner surface of the cavity 7, a limit ring 11 is slidably arranged on the inner surface of the first annular groove 10, and a sealing rubber sleeve 12 is fixedly arranged on the inner side of the limit ring 11, the inner surface of the sealing rubber sleeve 12 fits tightly and slides with the surface of the piston 8, and the opening width of the first annular groove 10 is greater than the width of the limit ring 11, a second annular groove 13 is provided on the right side of the inner surface of the cavity 7, and a sealing ring sleeve 14 is fixedly installed on the inner surface of the second annular groove 13, and the inner side surface of the sealing ring sleeve 14 fits tightly and slides on the surface of the piston 8.

[0021] Furthermore, the mesh air inlet at the rear side of the ventilation shell 5 enables the small blower 6 to continuously and stably inhale fresh air from the outside.

[0022] Furthermore, the wind generated by the small blower 6 is gathered by the sink 2 and distributed to each through cavity 3, and sent into the inner side of the brake caliper frame 1 to cool the brake disc and brake pad.

[0023] Furthermore, the dust filter 4 can prevent the fine particles of impurities carried by the air from causing wear to the brake disc and the brake disc.

[0024] Furthermore, the limiting ring 11 disposed on the surface of the sealing rubber sleeve 12 moves inside the first annular groove 10 , and utilizes the maximum width distance of the first annular groove 10 , thereby limiting the maximum extension and contraction distance of the sealing rubber sleeve 12 .

[0025] Furthermore, the sealing rubber sleeve 12 slides against the surface of the piston 8 and moves with the piston 8 to protect the piston 8 before reaching the maximum extension distance. After reaching the maximum extension distance, the piston 8 can only move independently. At this time, the sealing rubber sleeve 12 can scrape off the debris adhered to the surface of the piston 8 during the extension and retraction process to avoid wear of the piston 8.

[0026] Furthermore, the sealing ring sleeve 14 is located at the middle and rear end of the piston 8 . After the piston 8 moves to the maximum distance, its rear end is tightly fitted with the sealing ring sleeve 14 to prevent leakage of hydraulic oil inside the oil storage chamber 9 .

[0027] Working principle: When using the wear-resistant rear brake caliper, first, when braking the vehicle, press the brake pedal, and the hydraulic oil is quickly injected into the oil storage chamber 9. As the hydraulic pressure increases, the piston 8 will also be pushed along. When the piston 8 moves, the sealing rubber sleeve 12 will first slide to the left along the first ring groove 10 through the limiting ring 11, and move a distance with the piston 8. When the limiting ring 11 reaches the leftmost side of the first ring groove 10, the sealing rubber sleeve 12 stops extending, but will not affect the continued extension of the piston 8, and protects a section of the piston 8 that extends out. The sealing ring sleeve 14 can block the hydraulic oil when the piston 8 extends the maximum distance to prevent hydraulic oil leakage. At this time, the brake pad is frictionally braked with the brake disc, and the small blower 6 works synchronously when the overall braking device is working. The machine 6 sucks in external cold air and blows it into the trough 2, and then blows it to the inner side of the brake caliper frame 1 through the through cavity 3 inside the trough 2 to cool the brake disc and the brake pad continuously. The brake pedal is released, the piston 8 retracts, and the small blower 6 also stops working. At this time, the wind formed by the vehicle's driving will subsequently cool the brake disc. When the piston 8 retracts, it will also drive the sealing rubber sleeve 12 to move to the right until the limiting ring 11 outside the sealing rubber sleeve 12 is buckled on the right inner wall of the first ring groove 10. The sealing rubber sleeve 12 will no longer move, and the piston 8 can continue to retract for a distance. At this time, the sealing rubber sleeve 12 will scrape off the stains and debris stuck to the front end surface of the piston 8 to avoid following the piston 8 into the cavity 7 and rubbing and wearing against the inner wall. This is the working principle of the wear-resistant rear brake caliper.

Claims

1. A wear-resistant rear brake caliper, comprising a brake caliper frame (1), characterized in that: A recessed groove (2) is provided in the middle of the upper surface of the brake caliper frame (1); three through cavities (3) are evenly distributed below the inner surface of the recessed groove (2); dust filters (4) are fixedly installed on the inner surfaces of the through cavities (3); a ventilation shell (5) is fixedly installed at the edge of the recessed groove (2) above the surface of the brake caliper frame (1); and a small blower (6) is fixedly installed on the inner surface of the ventilation shell (5).

2. A wear-resistant rear brake caliper according to claim 1, characterized in that: A cavity (7) is provided on the right inner wall of the surface of the brake caliper frame (1), and a piston (8) is slidably arranged on the inner surface of the cavity (7).

3. A wear-resistant rear brake caliper according to claim 2, characterized in that: The cavity formed by the rear end of the piston (8) and the cavity (7) being blocked is configured as an oil storage cavity (9), and a first annular groove (10) is provided on the left side of the inner surface of the cavity (7).

4. A wear-resistant rear brake caliper according to claim 3, characterized in that: A limit ring (11) is slidably disposed on the inner surface of the first ring groove (10), and a sealing rubber sleeve (12) is fixedly disposed on the inner side of the limit ring (11).

5. A wear-resistant rear brake caliper according to claim 4, characterized in that: The inner surface of the sealing rubber sleeve (12) and the surface of the piston (8) are tightly fitted and slidable, and the opening width of the first ring groove (10) is greater than the width of the limiting ring (11).

6. The wear-resistant rear brake caliper according to claim 2, characterized in that: A second annular groove (13) is provided on the right side of the inner surface of the cavity (7), and a sealing ring sleeve (14) is fixedly installed on the inner surface of the second annular groove (13), and the inner side surface of the sealing ring sleeve (14) is tightly fitted and slides on the surface of the piston (8).

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