A brake hub apparatus for a vehicle brake system

Abstract

The utility model discloses a kind of brake hub devices of vehicle braking system, belong to automobile parts technical field, including backplate, sliding slot, axle, cylinder, piston rod, brake shoe, brake drum, axle is set through in backplate inner side center position, brake shoe is movably installed in backplate surface both sides, brake drum is outside backplate.The utility model auxiliary brake mechanism, by foolproof sliding block, installation slide, connecting column, shell, movable cavity, movable connecting rod, connecting sleeve ring, auxiliary resistance sheet, installation sliding slot, between cooperation use of foolproof sliding slot, by the fitting of each component, the each component installed on the surface of backplate can be conveniently and quickly installed and replaced, compared with the dismounting speed of the fixed installation mode of each component is faster, and simultaneously by setting auxiliary resistance sheet, brake shoe and brake drum can be replaced to realize brake by friction, can effectively reduce the wear of brake shoe surface, improve the service life of brake shoe.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically a brake hub device for a vehicle braking system. Background Technology

[0002] The technical name for a brake drum is brake hub, often shortened to brake drum. It's a key component of a drum brake system. During braking, the inner surface of the brake drum rubs against the brake pads to achieve the braking effect. Simply put, a brake hub is like a metal drum or a small bucket fitted onto the wheel rim. The bottom of the bucket rubs against the wheel rim during braking to stop the car. The brake drum is a crucial component of a drum brake system; the inner surface of the brake drum is where the braking torque is generated. To achieve the same braking torque, the diameter of the brake drum in a drum brake system can be much smaller than that of a disc brake. Therefore, large vehicles used for heavy-duty transport must install drum brakes within the limited space of the wheel rim to obtain powerful braking force.

[0003] Because existing drum brake systems use hydraulic oil to move the piston rod inside the cylinder to push one end of the brake shoe around the axis on which the brake shoe is mounted, the brake shoe locally rubs against the inner wall of the brake drum to achieve braking. Due to its small contact area, the braking efficiency is low. In addition, the cylinder, brake shoe and other components mounted on the back plate of the existing car brake hub are all fixed components, making them difficult to disassemble for cleaning. This can easily lead to some areas not being cleaned properly, and it is also difficult to replace a single damaged part. Utility Model Content

[0004] The purpose of this utility model is to provide a brake hub device for a vehicle braking system in order to solve the problems of difficult replacement of the above-mentioned parts and low braking efficiency.

[0005] The technical solution adopted by this utility model is as follows: A brake hub device for a vehicle braking system includes a back plate, a groove, an axle, a cylinder, a piston rod, brake shoes, and a brake drum. An axle is inserted through the center of the inner side of the back plate. Cylinders are provided on both the upper and lower sides of the back plate surface. Piston rods are movably installed on both sides inside the cylinders. The top of the cylinders is connected to the high-pressure gas delivery pipe of the vehicle braking system through a hose. A groove is provided on the surface of the back plate. Brake shoes are movably installed on both sides of the back plate surface. A brake drum is provided on the outside of the back plate. The bottom edge of the brake drum rotates in the groove. The threaded groove of the brake drum is fixed to the screw of the axle head by a nut. The back plate surface is provided with a disassembly and assembly mechanism for easy disassembly of the brake shoes and an auxiliary braking mechanism that can reduce brake shoe wear, improve braking efficiency, and facilitate disassembly and assembly.

[0006] The disassembly and assembly mechanism includes a limiting groove, a limiting slider, and a clamp. The piston rod has a limiting groove at one end, and the brake shoes have limiting sliders on both sides. The limiting sliders are T-shaped and fit with the limiting groove. The brake shoes are clamped on the outside, and the clamps are fixed by bolts to the fitted limiting sliders and limiting grooves.

[0007] The auxiliary braking mechanism includes a foolproof slider, a mounting edge, a connecting post, a housing, a movable cavity, a movable connecting rod, a connecting collar, an auxiliary stop plate, a mounting groove, and a foolproof groove. The brake shoe surface is provided with a foolproof slider, mounting edges are provided on both sides of the brake shoe surface edge, and connecting posts are provided on both sides of the other side edge of the brake shoe surface. A housing is bolted to the back plate surface near the lower part of the cylinder. Movable cavities are provided on both sides inside the housing, and a movable connecting rod is movably mounted inside each movable cavity. A spring connects the movable cavity and the movable connecting rod. A connecting collar is provided at one end of the movable connecting rod, and the connecting collar and the connecting post are fitted together and fixed together by bolts. An auxiliary stop plate is provided on the outside of the brake shoe, and the inner wall of the auxiliary stop plate is attached to and covers one side surface of the brake shoe. A mounting groove is provided on both sides of the surface of the auxiliary stop plate, and the mounting edge is "cross-shaped" and fitted together with the mounting groove, and fixed together by bolts. An anti-fooling groove is provided in the middle of the surface of the auxiliary stop plate, and the anti-fooling slider is isosceles trapezoidal and fitted together with the anti-fooling groove.

[0008] The auxiliary resist sheet is made of asbestos.

[0009] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0010] 1. In this utility model, by setting up a disassembly and assembly mechanism, and by using the limiting slide groove, the limiting slider and the clamp in cooperation, by releasing the clamp to fix the limiting slide groove and the limiting slider, and then releasing the fitting of the limiting slide groove and the limiting slider, the brake shoes can be easily disassembled and replaced. This facilitates the disassembly and replacement of brake shoes during automobile maintenance and brings convenience to workers.

[0011] 2. In this utility model, by setting an auxiliary braking mechanism, the anti-foolproof slider, mounting sliding edge, connecting column, housing, movable cavity, movable connecting rod, connecting collar, auxiliary stop plate, mounting slide groove, and anti-foolproof slide groove are used in cooperation. Through the fit of each component, the various components mounted on the back plate surface can be installed and replaced conveniently and quickly. Compared with the existing method of fixing the components, the disassembly speed is faster. At the same time, by setting an auxiliary stop plate, the brake shoes can replace the friction between the brake shoes and the brake drum to achieve braking, which can effectively reduce the wear of the brake shoe surface and improve the service life of the brake shoes.

[0012] 3. In this utility model, the brake shoes are driven by two cylinders to move laterally so that the entire surface of the brake shoes comes into contact with the inner wall of the brake drum to brake the car. This method is more efficient than the rotation method where the brake shoes partially contact the inner wall of the brake drum. Attached Figure Description

[0013] Figure 1 This is a simplified schematic diagram of the overall three-dimensional structure of this utility model;

[0014] Figure 2 This is a simplified schematic diagram of the overall front structure of this utility model;

[0015] Figure 3 This utility model Figure 2 A simplified diagram of the enlarged structure at point A in the middle;

[0016] Figure 4 This utility model Figure 2 A simplified diagram of the enlarged structure at point B.

[0017] The markings in the diagram are: 1. Back plate; 101. Slide groove; 102. Axle; 103. Anti-foolproof slider; 2. Cylinder; 201. Piston rod; 202. Limiting slide groove; 3. Brake shoe; 301. Limiting slider; 302. Clamp; 303. Mounting slide edge; 304. Connecting post; 4. Housing; 401. Movable cavity; 402. Movable connecting rod; 403. Connecting collar; 5. Auxiliary stop plate; 501. Mounting slide groove; 502. Anti-foolproof slide groove; 6. Brake drum. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1:

[0020] Reference Figure 1-4 A brake hub device for a vehicle braking system includes a back plate 1, a groove 101, an axle 102, a cylinder 2, a piston rod 201, brake shoes 3, and a brake drum 6. The axle 102 is inserted through the center of the inner side of the back plate 1. Cylinders 2 are installed on both the upper and lower sides of the back plate 1. Piston rods 201 are movably installed on both sides inside the cylinders 2. The top of the cylinders 2 is connected to the high-pressure gas delivery pipe of the vehicle braking system through a hose. The back plate 1 has a groove 101. Brake shoes 3 are movably installed on both sides of the back plate 1. The brake drum 6 is located outside the back plate 1. The bottom edge of the brake drum 6 rotates within the groove 101. The threaded groove of the brake drum 6 is fixed to the screw of the axle head of the axle 102 by a nut. The back plate 1 has a disassembly and assembly mechanism for easy disassembly of the brake shoes 3 and an auxiliary braking mechanism that can reduce the wear of the brake shoes 3, improve braking efficiency, and facilitate disassembly and assembly.

[0021] Reference Figure 1-4 In this embodiment, the disassembly and assembly mechanism includes a limiting groove 202, a limiting slider 301, and a clamp 302. The piston rod 201 has a limiting groove 202 at one end, and the brake shoe 3 has limiting sliders 301 on both sides. The limiting sliders 301 are T-shaped and fit with the limiting groove 202. The brake shoe 3 has a clamp 302 on the outside. The clamp 302 is fixed to the limiting sliders 301 and the limiting groove 202 by bolts. The clamp 302 can be removed by unscrewing the bolts that fix the limiting groove 202, the limiting slider 301, and the clamp 302, and then the brake shoe 3 can be disassembled by sliding to release the fit between the limiting groove 202 and the limiting slider 301.

[0022] Reference Figure 1-4In this embodiment, the auxiliary braking mechanism includes a foolproof slider 103, a mounting sliding edge 303, a connecting post 304, a housing 4, a movable cavity 401, a movable connecting rod 402, a connecting collar 403, an auxiliary stop plate 5, a mounting groove 501, and a foolproof groove 502. The brake shoe 3 has a foolproof slider 103 on its surface, mounting sliding edges 303 on both sides of the edge of the brake shoe 3, and connecting posts 304 on both sides of the other edge of the brake shoe 3. The housing 4 is bolted to the surface of the back plate 1 near the bottom of the cylinder 2. Movable cavities 401 are provided on both sides inside the housing 4, and movable connecting rods 402 are movably disposed inside the movable cavities 401. A spring connects the movable cavity 401 and the movable connecting rod 402. A connecting collar 403 is provided at one end of the movable connecting rod 402, and the connecting collar 403 and the connecting post 304 are fitted together and fixed together by bolts. An auxiliary stop plate 5 is provided on the outside of the brake shoe 3, and the inner wall of the auxiliary stop plate 5 is attached to and covers one side surface of the brake shoe 3. Both sides of the surface of the auxiliary stop plate 5 are provided with mounting grooves 501, and the mounting sliding edge 303 is "cross-shaped". The mounting sliding edge 303 and the mounting groove 501 are fitted together and fixed together by bolts. An anti-foolproof groove 502 is provided in the middle of the surface of the auxiliary stop plate 5, and the anti-foolproof slider 10 is provided. 3 is an isosceles trapezoidal shape, and the anti-foolproof slider 103 and the anti-foolproof groove 502 are fitted together. When the driver needs to brake while driving, pressing the brake pedal, under the action of the lever, sends the high-pressure gas in the air chamber through the pipe to the cylinder 2, pushing the piston rods 201 on both sides to move outward. During the movement, the two brake shoes 3 are pushed outward. The auxiliary braking plates 5 installed on the brake shoes 3 contact and rub against the inner wall of the rotating brake drum 6 to reduce the speed of the wheels installed on both sides of the axle 102, thereby achieving braking of the car. When the auxiliary braking plates 5 are worn and need to be replaced, the worker first uses tools to remove the car's tires and rims. Remove the brake drum 6 from the axle head of the axle 102 by unscrewing the fixing nut. Then, unscrew the bolts fixing the mounting slide 303 and the mounting slide groove 501, and then release the engagement between the mounting slide 303 and the mounting slide groove 501, as well as the engagement between the anti-foolproof slide groove 502 and the anti-foolproof slider 103. This will remove the worn auxiliary stop plate 5. Then, install and fix the new auxiliary stop plate 5 by reversing the above operation. When it is necessary to disassemble other parts, the bolts fixing the connecting collar 403 and the connecting post 304 can be unscrewed, and then the bolts fixing the housing 4 can be unscrewed to release the engagement between the connecting collar 403 and the connecting post 304.

[0023] Reference Figure 1-4In this embodiment, the auxiliary damping plate 5 is made of asbestos material. Since asbestos material is often used in brake pads of disc brakes, using it as the material of the auxiliary damping plate 5 can also improve the braking efficiency of the drum brake and reduce the wear of the brake shoes 3. It can improve the braking efficiency while protecting the brake shoes 3.

[0024] Example 2:

[0025] Reference Figure 1-4 In addition to the embodiment in which the auxiliary resist 5 is made of asbestos, this utility model also has another embodiment: the auxiliary resist 5 is made of high carbon fiber material.

[0026] Because of the large molecular spacing of asbestos, the auxiliary damping plate 5 made of asbestos will experience greater wear when rubbing against the brake drum 6, resulting in a faster wear rate for the auxiliary damping plate 5 and requiring frequent replacement. In contrast, the high carbon fiber material has a denser molecular spacing, resulting in a higher density and a slower wear rate for the auxiliary damping plate 5, thus improving its service life.

[0027] Working principle: When the driver needs to brake while driving, pressing the brake pedal, under the action of the lever, sends the high-pressure gas in the cylinder chamber through the pipe to the cylinder 2, pushing the piston rods 201 on both sides to move outward. During this movement, the two brake shoes 3 are simultaneously pushed outward. The auxiliary braking plates 5 installed on the brake shoes 3 contact and rub against the inner wall of the rotating brake drum 6, thereby reducing the rotational speed of the wheels mounted on both sides of the axle 102, thus achieving braking. When the auxiliary braking plates 5 are worn and need to be replaced, the worker first uses tools to remove the tires and wheel hubs of the car, then unscrews the fixing nuts to remove the brake drum 6 from the axle head of the axle 102, and then unscrews the fixing mounting slide 303 and mounting groove 5. Unscrew the bolts of 01, then loosen the engagement between the mounting slide 303 and the mounting slide groove 501, as well as the engagement between the anti-foolproof slide groove 502 and the anti-foolproof slider 103, thereby removing the worn auxiliary stop plate 5 and installing and fixing the new auxiliary stop plate 5 in the reverse of the above operation. When it is necessary to disassemble other parts, the bolts of the fixing connecting collar 403 and the connecting post 304 can be unscrewed, and then the bolts of the fixing housing 4 can be unscrewed to loosen the engagement between the connecting collar 403 and the connecting post 304 to disassemble them. Alternatively, the clamp 302 can be removed by unscrewing the bolts of the fixing limiting slide groove 202, the limiting slider 301 and the clamp 302, and then the engagement between the limiting slide groove 202 and the limiting slider 301 can be slid out to disassemble the brake shoe 3.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake hub device for a vehicle braking system, comprising a back plate (1), a groove (101), an axle (102), a cylinder (2), a piston rod (201), brake shoes (3), and a brake drum (6), wherein the axle (102) is disposed through the center of the inner side of the back plate (1), and cylinders (2) are disposed on both the upper and lower sides of the surface of the back plate (1), and piston rods (201) are movably disposed on both sides inside the cylinders (2), and the top of the cylinders (2) is connected to the high-pressure gas delivery pipe of the vehicle braking system through a hose, the groove (101) is disposed on the surface of the back plate (1), brake shoes (3) are movably installed on both sides of the surface of the back plate (1), and a brake drum (6) is disposed outside the back plate (1), wherein the bottom edge of the brake drum (6) rotates within the groove (101), and the threaded groove of the brake drum (6) is fixed to the screw of the axle head of the axle (102) by a nut, characterized in that: The back plate (1) surface is provided with a disassembly and assembly mechanism that facilitates the disassembly of the brake shoes (3) and an auxiliary braking mechanism that can reduce the wear of the brake shoes (3), improve braking efficiency, and facilitate disassembly and assembly.

2. The brake hub device for a vehicle braking system as described in claim 1, characterized in that: The disassembly and assembly mechanism includes a limiting groove (202), a limiting slider (301), and a clamp (302). The piston rod (201) has a limiting groove (202) at one end, the brake shoe (3) has limiting sliders (301) on both sides, and the brake shoe (3) has a clamp (302) on the outside.

3. The brake hub device for a vehicle braking system as described in claim 1, characterized in that: The auxiliary braking mechanism includes a foolproof slider (103), a mounting slide edge (303), a connecting post (304), a housing (4), a movable cavity (401), a movable connecting rod (402), a connecting collar (403), an auxiliary stop plate (5), a mounting groove (501), and a foolproof groove (502). The brake shoe (3) has a foolproof slider (103) on its surface, mounting slide edges (303) on both sides of the edge of the brake shoe (3), and connecting posts (304) on both sides of the other edge of the brake shoe (3). The back plate (1) is fitted with a housing (4) near the cylinder (2) by bolts. The housing (4) has movable cavities (401) on both sides. A movable connecting rod (402) is movably arranged inside the movable cavity (401). A connecting collar (403) is provided at one end of the movable connecting rod (402). The brake shoe (3) has an auxiliary stop plate (5) on the outside. The auxiliary stop plate (5) has mounting grooves (501) on both sides. An anti-fooling groove (502) is provided in the middle of the surface of the auxiliary stop plate (5).

4. The brake hub device for a vehicle braking system as described in claim 2, characterized in that: The limiting slider (301) is T-shaped and is fitted with the limiting groove (202). The clamp (302) is fixed by bolts to the fitted limiting slider (301) and the limiting groove (202).

5. The brake hub device for a vehicle braking system as described in claim 3, characterized in that: The anti-foolproof slider (103) is an isosceles trapezoid, and the anti-foolproof slider (103) and the anti-foolproof groove (502) are fitted together. The mounting slide (303) is a cross shape, and the mounting slide (303) and the mounting groove (501) are fitted together and fixed together by bolts. The connecting collar (403) and the connecting column (304) are fitted together and fixed together by bolts. A spring is connected between the movable cavity (401) and the movable connecting rod (402).

6. The brake hub device for a vehicle braking system as described in claim 3, characterized in that: The inner wall of the auxiliary damping plate (5) is attached to and covers one side surface of the brake shoe (3).

7. The brake hub device for a vehicle braking system as described in claim 3, characterized in that: The auxiliary resist (5) is an auxiliary resist (5) made of asbestos.

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