Rear disc brake with parking brake structure

Abstract

The utility model relates to a rear disc brake with parking brake structure belongs to the technical field of automobile brake, the support of parking brake structure is fixedly connected on the casing of caliper body through screw, and the both ends of compression link respectively contact with the contact connection of two push rods of caliper body. Advantage is novel structure, utilizes parking brake structure, realizes "lever conversion", and the linear tension of brake cable is passed through lever principle and is made into the force that is amplified to push rod and is directly acted on brake pad with the amplified force, makes brake pad tightly clamps brake disc, realizes parking brake through friction force. Brake efficiency is high, and performance is stable, and easy to install, and the failure rate is low, and maintenance is convenient, and cost is low. It does not depend on hydraulic pressure, air pressure or electric power and the like possible failure system, and the independence is strong and does not depend on hydraulic system, even if the parking brake is still effective even if the service brake fails, fully embodies the efficient application of mechanical lever principle in engineering, improves the parking effect and vehicle safety.

Description

Technical Field

[0001] This utility model belongs to the field of automotive braking technology, specifically relating to a rear disc brake with a parking brake structure. Background Technology

[0002] Rear disc brakes are a key component of modern automotive braking systems. They can operate in two ways: one is to generate braking force to stop or decelerate the vehicle; the other is as parking brakes or emergency brakes. When the car stops or the service brake system fails, the driver manually pulls the brake cable and the parking lever. Through a series of transmission mechanisms, force is directly applied to the piston to achieve braking.

[0003] Currently, parking brakes utilize a screw or cam mechanism to push brake pads to clamp the brake disc, thus creating a parking brake. This type of parking brake has drawbacks such as complexity, large size, susceptibility to low temperatures and corrosion, and high maintenance costs, which can easily lead to safety hazards and cause collisions due to the vehicle's inability to brake. Summary of the Invention

[0004] This utility model provides a rear disc brake with a parking brake structure to solve the problems of complex structure, large size, susceptibility to low temperature and corrosion, and high maintenance cost of existing brakes.

[0005] The technical solution adopted by this utility model includes a clamp body and a parking brake structure, wherein the bracket of the parking brake structure is fixedly connected to the housing of the clamp body by screws, and the two ends of the pressure rod are respectively connected to the two push rods of the clamp body.

[0006] The clamp body includes a housing, a dust cover, a push rod, a return spring, a first brake pad, a brake disc, and a second brake pad. The front end of the push rod is in contact with the first brake pad. The return spring is sleeved on the part of the push rod located outside the housing. The dust cover is sleeved on the outside of the return spring. The second brake pad and the first brake pad are located on opposite sides of the brake disc.

[0007] The parking brake structure includes an operating lever, a pressure lever, a pivot pin, a bushing, a bracket, a cotter pin, and a brake cable connection hole. The top of the operating lever is fixedly connected to the pressure lever, and the front end is also fixedly connected to the bushing. The pivot pin passes through two holes on the bracket and the bushing, and the top end is connected to the cotter pin to prevent it from coming out. The rear end of the operating lever has a brake cable connection hole.

[0008] The section of the lever from the pressure rod to the fulcrum pin is a short lever arm, which acts as a resistance arm.

[0009] The section of the lever from the brake cable connection hole to the fulcrum pin is a long lever arm, serving as the power arm.

[0010] The operating lever and the pressure lever are installed by interference fit through the straight lines on the pressure lever.

[0011] A parking brake structure for a rear disc brake includes an operating lever, a pressure lever, a pivot pin, a bushing, a bracket, a cotter pin, and a brake cable connection hole. The top end of the operating lever is fixedly connected to the pressure lever, and the front end is also fixedly connected to the bushing. The pivot pin passes through two holes on the bracket and the bushing, and the top end is connected to the cotter pin to prevent it from coming out. The rear end of the operating lever has a brake cable connection hole.

[0012] The clamp mounting plate of the bracket is provided with a pair of parallel mounting ears, and the mounting ears have coaxial pin holes for inserting fulcrum pins.

[0013] After the bracket and the housing of the clamp are installed, the clamp mounting plate and the first and second brake pads of the clamp are parallel.

[0014] The operating lever is an arc-shaped lever that bends towards the mounting plate of the clamp body. 。

[0015] The advantages of this invention are its novel structure. Utilizing a parking brake structure, it achieves "lever conversion," amplifying the linear tension from the brake cable through a lever principle. This amplified force pushes a push rod, directly applying force to the brake pads, causing them to clamp tightly against the brake disc. Parking braking is achieved through friction. Upon release, the push rod separates from the brake pads under the action of a return spring, the brake pads return to their original position, and the brake is released. It boasts high braking efficiency, stable performance, easy installation, low failure rate, convenient maintenance, and low cost. It does not rely on potentially failing systems such as hydraulic, pneumatic, or electrical systems, but rather ensures the vehicle can reliably remain stationary through a pure parking brake lever. The braking is sensitive and responsive. Its strong independence from hydraulic systems means that even if the service brake fails, the parking brake remains effective, fully demonstrating the efficient application of the mechanical lever principle in engineering, improving parking effectiveness and vehicle safety. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 The right view; Figure 3 yes Figure 1 AA section view; Figure 4This is a schematic diagram of the parking brake structure of this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the drawings, not all of the structure. It should be understood that conventional techniques known to those skilled in the art include clamps, etc., the details of which will not be elaborated in this specification.

[0019] See Figure 1 , 2 3, including caliper body 1 and parking brake structure 2, wherein the bracket 205 of the parking brake structure 2 is fixedly connected to the housing of caliper body 1 by screws, and the two ends of the pressure rod 202 are respectively connected to the two push rods 103 of caliper body 1.

[0020] See Figure 3 The clamp body 1 includes a housing 101, a dust cover 102, a push rod 103, a return spring 104, a first brake pad 105, a brake disc 106, and a second brake pad 107. The front end of the push rod 103 is in contact with the first brake pad 105. The return spring 104 is sleeved on the part of the push rod 103 located outside the housing 101. The dust cover 102 is sleeved on the outside of the return spring 104. The second brake pad 107 and the first brake pad 105 are located on both sides of the brake disc 106, respectively.

[0021] See Figure 4 The parking brake structure 2 includes an operating lever 201, a pressure rod 202, a fulcrum pin 203, a bushing 204, a bracket 205, a cotter pin 206, and a brake cable connection hole 207. The top end of the operating lever 201 is fixedly connected to the pressure rod 202, and the front end is also fixedly connected to the bushing 204. The fulcrum pin 203 passes through two holes on the bracket 205 and the bushing 204, and the top end is connected to the cotter pin 206 to prevent it from coming out. The rear end of the operating lever 201 has a brake cable connection hole 207.

[0022] See Figure 4 The rod portion of the operating lever 201 from the pressure rod 202 to the fulcrum pin 203 is a short lever arm, which serves as a resistance arm.

[0023] See Figure 4 The rod portion from the brake cable connection hole 207 to the fulcrum pin 203 on the operating lever 201 is a long lever arm, serving as a power arm.

[0024] See Figure 4 The operating lever 201 and the pressure lever 202 are installed by interference fit through the straight grooves 20201 on the pressure lever 202.

[0025] See Figure 4 A parking brake structure for a rear disc brake includes an operating lever 201, a pressure lever 202, a pivot pin 203, a bushing 204, a bracket 205, a cotter pin 206, and a brake cable connection hole 207. The top end of the operating lever 201 is fixedly connected to the pressure lever 202, and the front end is also fixedly connected to the bushing 204. The pivot pin 203 passes through two holes on the bracket 205 and the bushing 204, and the top end is connected to the cotter pin 206 to prevent it from coming loose. The rear end of the operating lever 201 has a brake cable connection hole 207.

[0026] See Figure 4 The clamp mounting plate 20501 of the bracket 205 is provided with a pair of parallel mounting ears 20502, and the mounting ears have coaxial pin holes for inserting fulcrum pins.

[0027] See Figure 4 After the bracket 205 is installed with the housing 101 of the clamp body, its clamp body mounting plate 20501 is parallel to the first brake pad 105 and the second brake pad 107 of the clamp body.

[0028] See Figure 4 The operating lever 201 is an arc-shaped lever that bends towards the clamp body to mount the plate 20501. 。

[0029] Working principle The brake cable is connected to the brake cable connection hole 207 at one end of the operating lever 201. When the driver pulls the handbrake lever, the pulling force is transmitted to one end of the operating lever 201 through the metal brake cable. By swinging the operating lever, the amplified thrust, based on the lever principle, is pushed by the pressure lever 202 to the rear end of the push rod 103. The front end of the push rod 103 directly acts on the first brake pad 105, pressing it tightly against the brake disc 106. At the same time, the reaction force pushes the entire caliper 1 to slide inward, and the second brake pad 107 is also pulled towards the brake disc 106, clamping the brake disc 106. The wheels are locked by friction, achieving parking brake. When the brake is released, the parking lever is released, the pulling force disappears, the pressure lever is pushed back by the return spring 104, the brake pads return to their original position, the friction disappears, and the brake is released.

[0030] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any equivalent substitutions or modifications made by those skilled in the art based on the technical solution and the inventive concept of the present invention within the scope of the technical concept disclosed in the present invention shall all fall within the scope of protection of the present invention.

Claims

1. A rear disc brake with a parking brake structure, comprising a caliper body, characterized in that: It also includes a parking brake structure, wherein the bracket of the parking brake structure is fixedly connected to the housing of the caliper body by screws, and the two ends of the pressure rod are respectively connected to the two push rods of the caliper body; The clamp body includes a housing, a dust cover, a push rod, a return spring, a first brake pad, a brake disc, and a second brake pad. The front end of the push rod is in contact with the first brake pad. The return spring is sleeved on the part of the push rod located outside the housing. The dust cover is sleeved on the outside of the return spring. The second brake pad and the first brake pad are located on both sides of the brake disc, respectively. The parking brake structure includes an operating lever, a pressure lever, a pivot pin, a bushing, a bracket, a cotter pin, and a brake cable connection hole. The top of the operating lever is fixedly connected to the pressure lever, and the front end is also fixedly connected to the bushing. The pivot pin passes through two holes on the bracket and the bushing, and the top end is connected to the cotter pin to prevent it from coming out. The rear end of the operating lever has a brake cable connection hole.

2. A rear disc brake with a parking brake structure according to claim 1, characterized in that: The section of the lever from the pressure rod to the fulcrum pin is a short lever arm, which acts as a resistance arm.

3. A rear disc brake with a parking brake structure according to claim 1, characterized in that: The section of the lever from the brake cable connection hole to the fulcrum pin is a long lever arm, serving as the power arm.

4. A rear disc brake with a parking brake structure according to claim 1, characterized in that: The operating lever and the pressure lever are installed by interference fit through the straight lines on the pressure lever.

5. A rear disc brake with a parking brake structure according to claim 1, characterized in that: The clamp mounting plate of the bracket is provided with a pair of parallel mounting ears, and the mounting ears have coaxial pin holes for inserting fulcrum pins.

6. A rear disc brake with a parking brake structure according to claim 1, characterized in that: After the bracket and the housing of the clamp are installed, the clamp mounting plate and the first and second brake pads of the clamp are parallel.

7. A rear disc brake with a parking brake structure according to claim 5 or 6, characterized in that: The operating lever is an arc-shaped lever that bends towards the mounting plate of the clamp body.

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