Brake assembly

Abstract

A brake assembly relates to the technical field of brakes and comprises a shell, a piston and a friction component which are all of an annular structure, and the piston and the friction component are sequentially installed in an inner cavity of the shell from inside to outside in the axial direction of the shell. A gap exists between the piston and the cavity bottom of the shell to form a hydraulic oil cavity used for containing hydraulic oil, a protruding block is arranged on the outer wall of the shell, a hydraulic oil way is arranged in the protruding block, and the hydraulic oil cavity is communicated with the outside through the hydraulic oil way. The friction assembly comprises a first friction plate abutting against the piston, a partition plate axially abutting against the outer side of the first friction plate and a second friction plate axially abutting against the outer side of the partition plate, and a plurality of positioning lugs are arranged on the partition plate and installed on the shell. The friction area can be increased, the braking capacity is improved, the labor intensity is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and in particular to brake assemblies. Background Technology

[0002] The main function of the brake is to stop the tractor and directly generate frictional torque to force the tractor wheels to slow down or stop. It can slow down the tractor or stop it in the shortest distance, limit the speed when driving downhill, and keep the tractor reliably parked in place. Therefore, the brake must have sufficient braking force and good braking stability.

[0003] Traditional braking systems mainly come in mechanical, pneumatic, hydraulic, and air-hydraulic hybrid types. Their working principles are basically similar: they utilize the friction generated during braking to dissipate the vehicle's kinetic energy, thereby slowing it down until it comes to a stop.

[0004] Traditional tractor hydraulic brake assemblies generally suffer from a small friction area during braking, resulting in a longer braking distance and affecting braking performance. Moreover, the extended braking distance increases the driver's braking control time, increases the driver's workload, and reduces the lifespan of the brake pads. Utility Model Content

[0005] In view of this, the technical problem to be solved by this utility model is to provide a brake assembly that can increase the friction area, improve braking capacity, reduce labor intensity, and extend service life.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A brake assembly includes a housing, a piston, and a friction assembly, all of which are annular structures. The piston and the friction assembly are sequentially installed in the inner cavity of the housing from the inside to the outside along the axial direction of the housing.

[0008] There is a gap between the piston and the bottom of the housing to form a hydraulic oil chamber for receiving hydraulic oil. The outer wall of the housing is provided with a protrusion, and a hydraulic oil passage is provided inside the protrusion, which connects the hydraulic oil chamber to the outside.

[0009] The friction assembly includes a first friction plate that abuts against the piston, a partition plate that abuts axially against the outside of the first friction plate, and a second friction plate that abuts axially against the outside of the partition plate. The partition plate is provided with a plurality of positioning ears, which are mounted on the housing.

[0010] Preferably, the housing is provided with three circulating oil pipe mounting holes, which penetrate the housing radially.

[0011] Preferably, the circulating oil pipe mounting hole is a stepped hole, the small end of the circulating oil pipe mounting hole has a diameter of 5mm, and the large end of the circulating oil pipe mounting hole is provided with a mounting thread.

[0012] Preferably, a plurality of limiting pins are installed circumferentially at the bottom of the inner cavity of the housing, the limiting pins being adapted to the piston and used to limit the rotation of the piston.

[0013] Preferably, a plurality of balance springs are installed circumferentially at the bottom of the inner cavity of the housing, and one end of the balance springs abuts against the piston.

[0014] Preferably, the protrusion has an exhaust channel that communicates with the hydraulic oil chamber, and an exhaust bolt that communicates with the exhaust channel is installed on the protrusion.

[0015] Preferably, the number of positioning ears is three, and the three positioning ears are arranged at unequal intervals along the circumference of the partition.

[0016] Preferably, the positioning ear is a rectangular positioning ear or a semi-circular positioning ear.

[0017] Preferably, the housing has a positioning groove for accommodating the positioning ear.

[0018] Preferably, the first friction plate and the second friction plate have the same structure, both including a friction plate body, and annular linings are respectively provided on both ends of the friction plate body.

[0019] After adopting the above technical solution, the beneficial effects of this utility model are:

[0020] The brake assembly of this application includes a housing, a piston, and a friction assembly, with the piston and friction assembly sequentially installed from the inside to the outside of the housing's inner cavity. A gap exists between the piston and the bottom of the housing cavity to form a hydraulic oil chamber for containing hydraulic oil. A protrusion is provided on the outer wall of the housing, and a hydraulic oil passage is provided within the protrusion, connecting the hydraulic oil chamber to the outside. When the oil pressure in the hydraulic oil chamber increases, it can push the piston to move axially, thereby pushing the friction assembly located on its outer side to move together.

[0021] The friction assembly includes a first friction plate that abuts against the piston, a partition plate that axially abuts against the outer side of the first friction plate, and a second friction plate that axially abuts against the outer side of the partition plate. The partition plate has several positioning ears, which are mounted on the housing. When the piston moves under hydraulic pressure, it pushes the first friction plate towards the partition plate, causing friction between the friction plate and the partition plate, and moving the partition plate towards the second friction plate. This causes friction between the partition plate and the second friction plate, increasing the friction area. All four friction surfaces of the two friction plates participate in braking simultaneously, shortening the braking distance and braking time, thus reducing the driver's workload, reducing the friction duration of the friction plates, and extending their service life. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the brake assembly according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A sectional view;

[0025] Figure 3 yes Figure 2 Enlarged view of part A;

[0026] Figure 4 yes Figure 1 Exploded view;

[0027] Figure 5 yes Figure 4 A sectional view of the inner shell;

[0028] Figure 6 yes Figure 4 Schematic diagram of the structure of friction plate one;

[0029] In the picture:

[0030] 1. Housing; 11. Hydraulic oil chamber; 12. Protrusion; 13. Hydraulic oil passage; 14. Circulating oil pipe mounting hole; 15. Limit pin; 16. Balance spring; 17. Exhaust passage; 18. Positioning groove; 19. Hydraulic oil drain hole;

[0031] 2. Piston; 21. Sealing ring;

[0032] 3. Friction plate one;

[0033] 4. Partition; 41. Positioning ear;

[0034] 5. Friction plate two; 51. Friction plate body; 52. Liner. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] like Figures 1 to 5 As shown, the brake assembly of this utility model includes a housing 1, a piston 2, and a friction assembly, all of which are annular structures. The piston 2 and the friction assembly are sequentially installed in the inner cavity of the housing 1 from the inside to the outside along the axial direction of the housing 1. There is a gap between the piston 2 and the bottom of the cavity of the housing 1 to form a hydraulic oil chamber 11 for accommodating hydraulic oil. The outer wall of the housing 1 is provided with a protrusion 12, and a hydraulic oil passage 13 is provided in the protrusion 12, which connects the hydraulic oil chamber 11 to the outside. When the hydraulic pressure in the hydraulic oil chamber 11 changes, it can push the piston 2 to move along its axial direction, thereby affecting the friction assembly located on its outer side.

[0037] In this application, the friction assembly includes a friction plate 3 that abuts against the piston 2, a partition plate 4 that axially abuts against the outer side of the friction plate 3, and a second friction plate 5 that axially abuts against the outer side of the partition plate 4. The partition plate 4 is provided with a plurality of positioning ears 41, which are mounted on the housing 1. The housing 1 is provided with positioning grooves 18 for accommodating the positioning ears 41. When the piston 2 moves under hydraulic pressure, it can push the friction plate 3 towards the partition plate 4, causing friction with the partition plate 4 and driving the partition plate 4 to move together towards the second friction plate 5, so that the partition plate 4 also rubs against the second friction plate 5, thereby increasing the friction area. The four friction surfaces of the two friction plates participate in braking simultaneously, shortening the braking distance and braking time, thus reducing the driver's labor intensity, reducing the friction time of the friction plates, and extending the service life of the friction plates.

[0038] In this application, the housing 1 is provided with three circulating oil pipe mounting holes 14, which penetrate the housing 1 radially. Preferably, the circulating oil pipe mounting holes 14 are stepped holes, with the small end diameter of the holes being 5mm and the large end having mounting threads, allowing the user to select a suitable thread pitch according to their needs. When installing the circulating oil pipe, the user selects one of the circulating oil pipe mounting holes 14 for installation. After the circulating oil enters the housing 1 through the circulating oil pipe mounting hole 14, it lubricates the friction plates, extending their service life.

[0039] Several limiting pins 15 are installed circumferentially along the bottom of the inner cavity of the housing 1. The limiting pins 15 are adapted to the piston 2. A receiving hole is opened on the inner side of the piston 2, and one end of the limiting pin 15 is inserted into the receiving hole. The limiting pin 15 is used to limit the rotation of the piston 2. During use, the friction plate rotates together with it. In order to prevent it from affecting the performance of the piston 2, the limiting pins 15 are installed on the housing 1 to limit the rotation of the piston 2. Specifically, holes can be opened on the housing 1 and the piston 2, and the limiting pins 15 can be installed in the holes to achieve detachable limitation of the piston 2's rotation.

[0040] To prevent piston 2 from shifting and affecting braking performance, several balance springs 16 are installed circumferentially along the bottom of the inner cavity of housing 1, with one end of each balance spring 16 abutting against piston 2. Specifically, two sealing rings 21 are provided between piston 2 and housing 1. The sealing rings 21 are elastic sealing rings. When piston 2 moves outward, the hydraulic pressure in hydraulic oil chamber 11 is increased. When piston 2 moves inward, the rebound of the sealing rings 21 pulls piston 2 back. When piston 2 is pulled back, a balance spring 16 is provided on its inner side to prevent it from shifting.

[0041] The protrusion 12 is provided with an exhaust channel 17, which is connected to the hydraulic oil chamber 11. An exhaust bolt connected to the exhaust channel 17 is installed on the protrusion 12. The hydraulic oil contains some gas. After a period of use, in order to prevent the gas from accumulating and affecting the braking effect of this application, the gas in the hydraulic oil chamber 11 can be discharged through the exhaust channel 17 by opening the exhaust bolt, thus ensuring normal braking.

[0042] In this application, there are three positioning ears 41, which are arranged at unequal intervals along the circumference of the partition 4; preferably, the positioning ears 41 are rectangular or semi-circular positioning ears. The unequal spacing of the three positioning ears 41 corresponds to the unequal spacing of the three positioning grooves 18. This is to avoid the bolt mounting holes on the housing 1 and prevent the positioning grooves 18 from affecting the installation strength of the housing 1.

[0043] like Figure 4 , Figure 6 As shown, friction plate 3 and friction plate 5 have the same structure, both including a friction plate body 51, and annular lining plates 52 are respectively provided on both ends of the friction plate body 51.

[0044] The brake assembly of this application, when installed on a tractor, compresses the brake pump piston when the driver depresses the brake pedal, creating a vacuum in the entire hydraulic circuit. The brake pump draws brake fluid from the brake fluid reservoir, and the brake fluid flows through the brake lines and hydraulic passages 13 into the hydraulic fluid chamber 11, then returns to the brake fluid reservoir through the hydraulic fluid drain hole 19. Under the action of hydraulic pressure, the piston 2 is pressed, pushing the friction assembly. The four friction surfaces of the two friction pads simultaneously participate in braking, generating frictional force and consuming the vehicle's kinetic energy to achieve the braking effect.

[0045] 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 assembly, characterized in that, It includes a housing, a piston, and a friction assembly, all of which are annular structures. The piston and the friction assembly are sequentially installed in the inner cavity of the housing from the inside to the outside along the axial direction of the housing. There is a gap between the piston and the bottom of the housing to form a hydraulic oil chamber for receiving hydraulic oil. The outer wall of the housing is provided with a protrusion, and a hydraulic oil passage is provided inside the protrusion, which connects the hydraulic oil chamber to the outside. The friction assembly includes a first friction plate that abuts against the piston, a partition plate that abuts axially against the outside of the first friction plate, and a second friction plate that abuts axially against the outside of the partition plate. The partition plate is provided with a plurality of positioning ears, which are mounted on the housing.

2. The brake assembly as claimed in claim 1, characterized in that, The housing is provided with three circulating oil pipe mounting holes, which penetrate the housing radially.

3. The brake assembly as described in claim 2, characterized in that, The circulating oil pipe mounting hole is a stepped hole, the small end of the circulating oil pipe mounting hole has a diameter of 5mm, and the large end of the circulating oil pipe mounting hole is provided with a mounting thread.

4. The brake assembly as claimed in claim 1, characterized in that, The inner cavity bottom of the housing is provided with a plurality of limiting pins along its circumference. The limiting pins are adapted to the piston and are used to limit the rotation of the piston.

5. The brake assembly as claimed in claim 1, characterized in that, Several balance springs are installed circumferentially at the bottom of the inner cavity of the housing, and one end of each balance spring abuts against the piston.

6. The brake assembly as claimed in claim 1, characterized in that, The protrusion has an exhaust channel that communicates with the hydraulic oil chamber, and an exhaust bolt that communicates with the exhaust channel is installed on the protrusion.

7. The brake assembly as claimed in claim 1, characterized in that, The number of positioning ears is three, and the three positioning ears are arranged at unequal intervals along the circumference of the partition.

8. The brake assembly as claimed in claim 1, characterized in that, The positioning ear is a rectangular positioning ear or a semi-circular positioning ear.

9. The brake assembly as claimed in claim 8, characterized in that, The housing has a positioning groove for accommodating the positioning ear.

10. The brake assembly as claimed in claim 1, characterized in that, The first friction plate and the second friction plate have the same structure, both including a friction plate body, and annular linings are respectively provided on both ends of the friction plate body.

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