Parking brake assembly

Abstract

The utility model discloses a parking brake assembly, and relates to the technical field of parking brake systems. Comprising a brake bottom plate assembly, a plurality of brake shoes are arranged on the front face of the brake bottom plate assembly, the brake shoes are linearly and symmetrically arranged, each brake shoe is of a floating structure, an adjusting device is arranged between the tops of the brake shoes, and a plurality of brake drums are arranged between the brake bottom plate assembly and the brake shoes. The brake drum is in sliding connection with the brake bottom plate assembly and the brake shoe, and the brake bottom plate assembly and the brake shoe limit the brake drum. The pull arm and lever integrated design is adopted, meanwhile, the push rod is of a hollow structure and is axially assembled, the structure is smaller, the supporting spring is additionally arranged to enable the shoe to return stably, dragging abrasion is avoided, abnormal sound is eliminated, the compression spring and the compression spring base are integrated, the overall structure is simple, and the shoe is effectively prevented from jumping.

Description

Technical Field

[0001] The utility model relates to the technical field of parking brake systems, in particular to a parking brake assembly. Background Art

[0002] The parking brake assembly is an important device used to fix and keep the vehicle from moving when it is parked. The parking brake assembly is crucial to the parking safety of the vehicle. Whether in a parking lot, slope, traffic light or other parking scenarios, the parking brake assembly prevents the rotation of the vehicle tires to ensure that the vehicle is parked stably and avoids the risk of sliding or rolling. By pulling up the handbrake or stepping on the foot brake, the parking brake assembly can quickly fix the vehicle without relying on other devices or forces to keep the vehicle parked, allowing the driver to park the vehicle more easily and quickly release the parking brake to trigger it when needed. It can also prevent unnecessary pressure and deformation on the wheels when the vehicle is parked for a long time, reducing tire wear. In addition, the parking brake assembly usually also has the function of preventing the vehicle from slipping, which can provide additional protection in slippery or steep road conditions.

[0003] The traditional parking brake, the rocker arm radial assembly is structurally complex and bulky. It requires additional parts to achieve the rod connection and rocker arm movement, which increases the weight and size of the entire system. Such a design not only occupies the interior space of the vehicle, but also increases the complexity of the braking system, bringing certain difficulties to maintenance and repair. Secondly, the shoe is a key component for generating braking force. When the handbrake is released, the shoe should return to its original position quickly to ensure the normal operation of the braking system. However, in some cases, the rod connection of the rocker arm radial assembly may cause the shoe to return to an unstable or delayed position, which may reduce the braking effect and even lead to the risk of brake failure.

[0004] For this purpose, we have developed a new parking brake assembly. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing parking brake rocker arm is radially assembled, has a complex and bulky structure, and has poor return stability.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a parking brake assembly, including a brake base plate assembly, a plurality of brake shoes are arranged on the front of the brake base plate assembly, and the plurality of brake shoes are arranged in linear symmetry, the brake shoes are floating structures, and an adjustment device is arranged between the tops of the plurality of brake shoes, and a plurality of brake drums are arranged between the brake base plate assembly and the brake shoes, and the brake drums are slidably connected to the brake base plate assembly and the brake shoes, and the brake base plate assembly and the brake shoes limit the brake drums.

[0007] Through the above technical scheme, an integrated rocker arm lever structure is adopted, and the push rod is hollow and connected to the pull arm with a pin shaft, a support spring is added between the brake shoe and the brake base plate assembly, and an integrated compression spring and an isolation spring are added at the contact position of the shoe tendon of the base plate. This makes the overall structure simple, the assembly and replacement are quick, and the later maintenance is convenient. At the same time, the adjustment of the gap is more convenient and reliable, the space required is small, the brake shoe returns stably, and the overall weight is reduced.

[0008] The utility model is further configured that a pulling arm is provided at the bottom of several brake shoes, one end of the pulling arm is rotatably connected to the brake base plate assembly, a push rod is rotatably connected at the connection between the pulling arm and the brake base plate assembly, and the other end of the push rod is clamped with one of the brake shoes.

[0009] Through the above technical solution, the upper part of the brake base plate assembly is connected to the two brake shoes through the adjustment device, and the lower part acts on the pull arm and the push rod. Under the action of the input force of the pull arm, the brake shoe on one side will be pushed out first, and after contacting the brake drum, the reaction force will cause the brake shoe on the other side to be pushed out.

[0010] The utility model is further configured that an isolation spring is provided at the contact position of the tendon of the brake base plate assembly, and a plurality of brake shoe bottoms are fixedly connected with brake shoe return springs.

[0011] Through the above technical solution, an isolation spring is added to the tendon contact position of the base plate, which greatly reduces the wear of the base plate and the brake shoe. At the same time, the surface of the isolation spring is smooth and will not cause problems such as brake shoe jamming. Later maintenance only requires replacing the isolation spring, and the maintenance cost is low.

[0012] The utility model is further configured that the adjustment device includes an adjustment wheel, an internal thread structure is arranged inside the adjustment wheel, one side of the adjustment wheel is threadedly connected to an adjustment screw sleeve, and the other side of the adjustment wheel is threadedly connected to an adjustment bolt.

[0013] Through the above technical solution, the adjusting wheel adopts an internal thread design, and the gap adjustment only needs to be rotated, which is convenient and quick. At the same time, the thickness of the adjusting wheel is increased, and the contact surface with the retaining spring is increased. When the spring is stretched, the rotation of the adjusting wheel can still be effectively limited.

[0014] The utility model is further configured that a retaining spring is arranged on the top of the adjusting wheel, two ends of the retaining spring are respectively fixedly connected to the brake shoe, and a supporting spring is arranged between the brake shoe and the brake base plate assembly.

[0015] Through the above technical solution, a support spring is added between the brake shoe and the brake base plate assembly. The base of the spring is fixed around the base plate boss, and the upper arc is obliquely in contact with the arc position of the shoe tendon. Because the brake shoe is a floating structure, it plays a stabilizing return role when the brake shoe returns, making the brake shoe symmetrically distributed. At the same time, under the joint action of the compression springs on both sides, the movement of the brake shoe is limited, eliminating abnormal noise on bumpy roads or potholes.

[0016] The utility model is further configured that a compression spring is arranged in the middle of a plurality of the brake shoes, and the compression spring is fixedly connected to the brake shoe, a pull rod is arranged inside the compression spring, one end of the pull rod is fixedly connected to the compression spring, and the other end of the pull rod is slidably connected to the brake shoe.

[0017] The support spring is limited to the middle position of the brake base plate assembly and is placed under the brake shoe. The support spring ensures that the brake shoe is always in the middle position.

[0018] Through the above technical scheme, an integrated design of a compression spring seat is adopted in which a compression spring and a pull rod are formed, which has a simple structure and is convenient for later replacement and maintenance. Compared with the traditional structure in which the compression spring and the compression spring seat are in contact and easily wear, the compression spring seat with an integrated structure has better durability. At the same time, the brake shoe is effectively prevented from jumping under the action of the axial force of the compression spring.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model adopts an integrated design of a pull arm lever, a hollow structure of a push rod and axial assembly, so that a small space is required and the durability is strong. In addition, a support spring is added to make the brake shoe return stably, avoid dragging and eliminate abnormal noise. The compression spring and the compression spring seat are integrated with a simple structure, which effectively prevents the brake shoe from jumping. The addition of an isolation spring makes the bottom plate and the brake shoe less likely to wear and get stuck, and maintenance is more convenient. At the same time, the adjusting wheel has good reliability and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a planar structural diagram of the utility model;

[0022] Figure 2 This is an exploded structural diagram of the adjusting screw sleeve of the utility model;

[0023] Figure 3 This is a structural diagram of the connection between the pull arm and the push rod of the utility model;

[0024] Figure 4 This is a structural diagram of the isolation spring of the utility model;

[0025] Figure 5 This is a structural diagram of a compression spring of the utility model;

[0026] Figure 6It is a partial cross-sectional view of the utility model;

[0027] Figure 7 It is a partial side sectional view of the utility model;

[0028] Figure 8 It is a side sectional view of the utility model.

[0029] In the figure: 1. Brake base plate assembly; 2. Retaining spring; 3. Adjusting bolt; 4. Adjusting wheel; 5. Adjusting screw sleeve; 6. Support spring; 7. Brake shoe; 8. Pull rod; 9. Compression spring; 10. Pull arm; 11. Push rod; 12. Isolation spring; 13. Brake shoe return spring; 14. Brake drum. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] See also Figures 1 to 8 A parking brake assembly includes a brake base plate assembly 1, an isolation spring 12 is arranged at the contact position of the tendon of the brake base plate assembly 1, a brake shoe return spring 13 is fixedly connected between the bottoms of a plurality of brake shoes 7, and a rocker lever integrated structure is adopted. At the same time, the push rod 11 is hollow and connected to the pull arm 10 by a pin shaft, a support spring 6 is added between the brake shoe 7 and the brake base plate assembly 1, and a compression spring 9 is arranged to be integrated and an isolation spring 12 is added at the contact position of the tendon of the base plate, so that the overall structure is simple, the assembly and replacement are quick, and the later maintenance is convenient. At the same time, the adjustment of the clearance is more convenient and reliable, and the required space is small. The brake shoe 7 return is stable, reducing the overall weight, a plurality of brake shoes 7 are arranged on the front of the brake base plate assembly 1, a compression spring 9 is arranged in the middle of the plurality of brake shoes 7, and the compression spring 9 is fixedly connected to the brake shoe 7, a pull rod 8 is arranged in the compression spring 9, one end of the pull rod 8 is fixedly connected to the compression spring 9, and the other end of the pull rod 8 is slidably connected to the brake shoe 7, the plurality of brake shoes 7 are linearly symmetrically arranged, the brake shoe 7 is a floating structure, a pull arm 10 is arranged at the bottom of the plurality of brake shoes 7, one end of the pull arm 10 is rotatably connected to the brake base plate assembly 1, and a push rod 11 is rotatably connected to the connection between the pull arm 10 and the brake base plate assembly 1;

[0032] The other end of the push rod 11 is clamped with one of the brake shoes 7, and an adjustment device is provided between the tops of several brake shoes 7. The upper part of the brake base plate assembly 1 is connected to the two brake shoes 7 through the adjustment device, and the lower part acts on the pull arm 10 and the push rod 11. Under the action of the input force of the pull arm 10, the brake shoe 7 on one side will be pushed out first. After contacting the brake drum 14, the brake shoe 7 on the other side is pushed out due to the reaction force. The adjustment device includes an adjustment wheel 4. The adjustment wheel 4 adopts an internal thread design. The gap adjustment only needs to rotate the adjustment wheel 4, which is convenient and quick. At the same time, the thickness of the adjustment wheel 4 is increased, and the contact surface with the retaining spring 2 is increased. When the spring is stretched, it can still effectively limit the rotation of the adjustment wheel 4. A retaining spring 2 is provided on the top of the adjustment wheel 4. , the two ends of the keeping spring 2 are fixedly connected with the brake shoe 7 respectively, a supporting spring 6 is arranged between the brake shoe 7 and the brake base plate assembly 1, an internal thread structure is arranged inside the adjusting wheel 4, one side of the adjusting wheel 4 is threadedly connected with an adjusting screw sleeve 5, and the other side of the adjusting wheel 4 is threadedly connected with an adjusting bolt 3, and a plurality of brake drums 14 are arranged between the brake base plate assembly 1 and the brake shoe 7, the brake drum 14 is slidably connected with the brake base plate assembly 1 and the brake shoe 7, and the brake base plate assembly 1 and the brake shoe 7 limit the brake drum 14, which greatly reduces the wear of the base plate and the brake shoe 7, and at the same time, the surface of the isolation spring 12 is smooth, which will not cause problems such as the brake shoe 7 being stuck, and the later maintenance only needs to replace the isolation spring 12, and the maintenance cost is low.

[0033] When the utility model is in use, the driver pulls the handbrake to drive the pull arm 10 to rotate, causing the brake shoe 7 to be pushed outward. After contacting the brake drum 14, the reaction force generated pushes the other side of the brake shoe 7 outward through the push rod 11 and the adjustment mechanism assembly (adjusting bolt 3, adjusting wheel 4, adjusting screw sleeve 5), thereby realizing parking braking. When the handbrake is released, the brake shoes 7 on both sides return to their original positions accordingly under the action of the retaining spring 2 and the brake shoe return spring 13. At the same time, under the action of the supporting spring 6, the brake shoes 7 on both sides are symmetrically distributed to avoid dragging.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A parking brake assembly, comprising a brake base plate assembly (1), characterized in that: A plurality of brake shoes (7) are arranged on the front of the brake base plate assembly (1), the plurality of brake shoes (7) are arranged in a linear symmetrical manner, the brake shoes (7) are of a floating structure, an adjustment device is arranged between the tops of the plurality of brake shoes (7), a plurality of brake drums (14) are arranged between the brake base plate assembly (1) and the brake shoes (7), the brake drums (14) are slidably connected to the brake base plate assembly (1) and the brake shoes (7), and the brake base plate assembly (1) and the brake shoes (7) limit the brake drums (14).

2. A parking brake assembly according to claim 1, characterized in that: A pulling arm (10) is provided at the bottom of a plurality of the brake shoes (7), one end of the pulling arm (10) is rotatably connected to the brake base plate assembly (1), a push rod (11) is rotatably connected at the connection between the pulling arm (10) and the brake base plate assembly (1), and the other end of the push rod (11) is clamped with one of the brake shoes (7).

3. A parking brake assembly according to claim 2, characterized in that: An isolation spring (12) is provided at the tendon contact position of the brake base plate assembly (1), and a brake shoe return spring (13) is fixedly connected between the bottoms of a plurality of brake shoes (7).

4. A parking brake assembly according to claim 3, characterized in that: The adjustment device comprises an adjustment wheel (4), an internal thread structure is arranged inside the adjustment wheel (4), one side of the adjustment wheel (4) is threadedly connected to an adjustment screw sleeve (5), and the other side of the adjustment wheel (4) is threadedly connected to an adjustment bolt (3).

5. A parking brake assembly according to claim 4, characterized in that: A retaining spring (2) is arranged on the top of the adjusting wheel (4), and both ends of the retaining spring (2) are respectively fixedly connected to the brake shoe (7), and a supporting spring (6) is arranged between the brake shoe (7) and the brake base plate assembly (1).

6. A parking brake assembly according to claim 5, characterized in that: The support spring (6) is limited to the middle position of the brake base plate assembly (1) and is placed below the brake shoe (7). The support spring (6) ensures that the brake shoe (7) is always in the middle position.

7. A parking brake assembly according to claim 6, characterized in that: A compression spring (9) is arranged in the middle of a plurality of the brake shoes (7), and the compression spring (9) is fixedly connected to the brake shoe (7). A pull rod (8) is arranged inside the compression spring (9), one end of the pull rod (8) is fixedly connected to the compression spring (9), and the other end of the pull rod (8) is slidably connected to the brake shoe (7) through the compression spring (9).

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