Running and parking integrated wet brake

Abstract

The utility model relates to a running and parking integrated wet brake which comprises brake assemblies, the brake assemblies are symmetrically arranged on the two sides of a main reduction differential mechanism, one end of each brake assembly is connected with the main reduction differential mechanism, and the other end of each brake assembly is connected with an axle housing. The brake assembly comprises a brake shell, one end of the brake shell is connected with the axle housing, the other end of the brake shell is connected with the main reduction differential assembly, and a brake pressing seat is arranged between the brake shell and the axle housing; a parking braking piston and a traveling braking piston are arranged in the brake shell, a parking oil cavity is formed between the parking braking piston and the brake shell, a traveling oil cavity is formed between the traveling braking piston and the brake shell, and the parking braking piston is connected with the main reduction differential assembly. According to the utility model, the situation that the existing conventional wet brake has a larger structure and is difficult to meet the use of large cargo handling equipment is avoided, meanwhile, a parking braking function is added, the braking reliability is effectively improved, and the running safety of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a travel-and-stop integrated wet brake. Background Art

[0002] With the continuous development of commercial vehicle technology, the traditional cargo handling equipment derived from it has undergone tremendous changes in many aspects such as structure and use environment. Especially for port machinery, large-scale, high efficiency and high reliability have become its main demands, and the important factors affecting the above advantages are the efficiency and high reliability of the equipment powertrain system.

[0003] As one of the core components of the powertrain system of the equipment, the efficient and reliable operation of the brake is particularly important for improving the advantages of the equipment. Especially for large-scale port machinery, excellent braking performance and high reliability are necessary considerations for brake selection, so wet brakes have been widely used in this field. However, conventional wet brakes have the following two shortcomings: First, conventional wet brakes are set on the wheel side. Although they can meet the basic use requirements of cargo handling equipment, their structure is relatively large for large-scale special equipment, resulting in the overall chassis height of the equipment being difficult to meet the use requirements, limiting its further expansion and application; second, most wet brakes only have service braking functions, which are difficult to meet the parking use requirements of the equipment, and there are serious safety hazards. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated wet brake for driving and parking in response to the deficiencies of the prior art, thereby avoiding the problem that the existing conventional wet brake structure is large and difficult to meet the needs of large cargo handling equipment, while adding a parking brake function, effectively improving the reliability of braking, and improving the safety of equipment operation.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A wet brake with integrated driving and stopping function comprises a brake assembly, wherein the brake assembly is symmetrically arranged on both sides of a main reduction differential, one end of the brake assembly is connected to the main reduction differential, and the other end of the brake assembly is connected to a bridge housing;

[0007] The brake assembly includes a brake housing, one end of which is connected to the bridge housing, and the other end of which is connected to the main reduction differential assembly, and a brake pressure seat is provided between the brake housing and the bridge housing; a parking brake piston and a service brake piston are provided in the brake housing, a parking oil chamber is provided between the parking brake piston and the brake housing, and a service oil chamber is provided between the service brake piston and the brake housing, and the parking brake piston is connected to the main reduction differential assembly.

[0008] Preferably, a seal is provided at the connection between the parking piston and the brake housing; a disc spring is provided between the parking brake piston and the main reduction differential, the brake pressure seat is connected to the brake housing, and the bridge housing is connected to the brake housing through the brake pressure seat.

[0009] Preferably, the brake seat is provided with a stepped hole and a through hole, the stepped hole is provided with a spring sleeve and a hexagon socket bolt, the hexagon socket bolt passes through the spring sleeve and is connected to the brake housing; the through hole is provided with a return spring and a hexagon head bolt, the hexagon head bolt passes through the return spring and is connected to the brake housing, and the parking release bolt passes through the bridge housing fixing hole and abuts against the brake seat.

[0010] Preferably, the main reduction differential includes a differential bearing seat, the parking brake piston is connected to the shoulder of the differential bearing seat, and the disc spring is provided between the parking piston and the differential bearing seat.

[0011] Preferably, it also includes a brake assembly, which includes a plurality of dual steel plates and friction plates, the dual steel plates are connected to the brake housing via splines, the friction plates are connected to the universal joint shaft via splines, and the plurality of dual steel plates and friction plates are staggered and arranged in parallel.

[0012] Preferably, the brake housing is provided with a parking brake air bleed port, a service brake oil port, a parking brake oil port and a service brake air bleed port, and the service brake oil port and the parking brake oil port are connected to an oil pump.

[0013] Preferably, the spring sleeve is a cylindrical spring sleeve, the cylindrical inclined surface of the cylindrical spring sleeve is provided with a groove, and the draft angle of the cylindrical inclined surface is 1° to 4°.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] 1. Integrated driving and parking brake design, safe and reliable: The integrated driving and parking function design realizes comprehensive coverage of two braking functions with one set of brakes, effectively improving the safety of equipment operation; at the same time, a manual parking brake release device is designed to solve the problem that the equipment cannot move in the unpowered state;

[0016] 2. Simple and compact structure, easy to arrange: integrated design in the main reduction part of the drive axle, with small radial and axial dimensions, which is convenient for efficient and stable arrangement of the equipment chassis;

[0017] 3. Self-adjusting clearance and excellent braking performance: With the function of self-adjusting clearance, it can greatly reduce the braking failure caused by friction plate wear and improve the reliability of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the brake housing of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection structure of the utility model with the bridge housing and the main reduction differential.

[0021] Reference numerals

[0022] 3. Axle housing; 4. Brake assembly; 6. Main reduction differential assembly; 11. Dual steel plates; 12. Friction plates; 13. Brake seat; 14. Spring sleeve; 15. Hexagon socket bolt; 16. Parking oil chamber; 17. Disc spring; 18. Parking brake piston; 19. Service brake piston; 20. Service oil chamber; 21. Return spring; 22. Hexagon bolt; 23. Differential bearing seat; 24. Brake housing; 25. Parking release bolt; 26. Parking brake bleed port; 27. Service brake oil port; 28. Parking brake oil port; 29. ​​Universal joint shaft; 30. Service brake bleed port. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] like Figure 3 As shown, a parking integrated wet brake comprises a brake assembly 4, which is symmetrically arranged on both sides of a main differential assembly 6, one end of the brake assembly 4 is connected to the main differential assembly 6, and the other end of the brake assembly 4 is connected to the bridge housing 3;

[0025] like Figure 1 As shown, the brake assembly 4 includes a brake housing 24, one end of the brake housing 24 is connected to the bridge housing 3, and the other end of the brake housing 24 is connected to the main reduction differential assembly 6, and a brake pressure seat 13 is provided between the brake housing 24 and the bridge housing 3; a parking brake piston 18 and a service brake piston 19 are provided in the brake housing 24, a parking oil chamber 16 is provided between the parking brake piston 18 and the brake housing 24, a service oil chamber 20 is provided between the service brake piston 19 and the brake housing 24, and the parking brake piston 18 is connected to the main reduction differential assembly 6.

[0026] A seal is provided at the connection between the parking brake piston 18 and the brake housing 24 ; a disc spring 17 is provided between the parking brake piston 18 and the main reduction differential assembly 6 , the brake pressure seat 13 is connected to the brake housing 24 , and the bridge housing 3 is connected to the brake housing 24 through the brake pressure seat 13 .

[0027] The brake seat 13 is provided with a stepped hole and a through hole. A spring sleeve 14 and a hexagon socket bolt 15 are provided in the stepped hole. The hexagon socket bolt 15 passes through the spring sleeve 14 and is connected to the brake housing 24. A return spring 21 and a hexagon head bolt 22 are provided in the through hole. The hexagon head bolt 22 passes through the return spring 21 and is connected to the brake housing 24. The parking release bolt 25 passes through the bridge housing 3 and abuts against the brake seat 13.

[0028] The main reduction differential assembly 6 includes a differential bearing seat 23 , the parking brake piston 18 is connected to the shoulder of the differential bearing seat 23 , and a disc spring 17 is provided between the parking brake piston 18 and the differential bearing seat 23 .

[0029] It also includes a brake assembly, which includes a plurality of dual steel plates 11 and friction plates 12. The dual steel plates 11 are connected to the brake housing 24 via splines, and the friction plates 12 are connected to the universal joint shaft 29 via splines. The plurality of dual steel plates 11 and friction plates 12 are staggered and arranged in parallel.

[0030] like Figure 2 As shown, the brake housing 24 is provided with a parking brake bleed port 26, a service brake oil port 27, a parking brake oil port 28 and a service brake bleed port 30, and the service brake oil port 27 and the parking brake oil port 28 are connected to an oil pump.

[0031] The spring sleeve 14 is a cylindrical spring sleeve, and a groove is arranged on the cylindrical inclined surface of the cylindrical spring sleeve. The draft angle of the cylindrical inclined surface is 1° to 4°.

[0032] The braking working principle of the utility model is as follows:

[0033] When braking is required during driving, the oil pump introduces high-pressure oil through the service brake oil port 27 and the oil channel. The high-pressure oil enters the service oil chamber 20, and pushes the brake seat 13 toward the brake assembly through the service brake piston 19, squeezing the dual steel plates 11 and the friction plates 12 to generate sliding friction to achieve the purpose of service braking; the high-temperature and high-pressure gas generated by braking is discharged through the service brake bleed port 30; when the service brake is released, the high-pressure oil flows back to the oil pump through the oil channel and the service brake oil port 27, and the service brake piston 19 and the brake seat 13 return to their original positions.

[0034] When the vehicle is parked and parking brake is required, the high-pressure oil in the parking oil chamber 16 flows into the oil pump through the oil channel and the parking brake oil port 28 to release the pressure in the parking oil chamber. At this time, the disc spring 17 pushes the parking brake piston 18 and the brake pressure seat 13 to move toward the brake assembly, squeezing the dual steel sheets 11 and the friction plates 12 to generate sliding friction to achieve the purpose of service braking; the high-temperature and high-pressure gas generated by braking is discharged through the parking brake bleed port 26; when the parking brake is released, the oil pump introduces high-pressure oil into the parking oil chamber 16 through the parking brake oil port 28 and the oil channel to offset the clamping force generated by the disc spring 17, and the brake pressure seat 13 moves away from the brake assembly under the action of the return spring 21, and the brake is released.

[0035] The working principle of the manual parking release of the utility model is as follows:

[0036] When the vehicle is parked and in a non-powered state, the parking release bolt 25 is manually screwed in, and the parking release bolt 25 pushes the brake pressing seat 13 away from the brake assembly, thereby achieving the purpose of releasing the parking.

[0037] The principle of the gap self-adjusting function of the utility model is as follows:

[0038] When the dual steel plates 11 and the friction plates 12 are worn, during braking, the service brake piston 19 or the parking brake piston 18 pushes the brake seat 13 to move axially under the action of the hydraulic oil to achieve braking, and at this time drives the spring sleeve 14 that has an interference fit with it to move synchronously. However, since the pressure of the hydraulic oil is greater than the sum of the rebound force of the return spring 21 and the derived axial force of the interference fit of the spring sleeve 14, and under the limiting action of the hexagon socket bolt 15, axial displacement occurs between the spring sleeve 14 and the brake seat 13. After braking is completed, the brake seat 13 moves away from the brake assembly under the action of the return spring 21. When the rebound force of the return spring 21 is equal to the derived axial force of the interference fit of the spring sleeve 14, the brake seat 13 stops moving. At this time, the spring sleeve 14 returns to its original position, and the moving distance of the brake seat 13 remains unchanged, which is equal to the height difference between the hexagon socket bolt 15 and the spring sleeve 14, thereby ensuring that the gap value between the dual steel plate 11 and the friction plate 12 is always equal under any circumstances, thereby achieving the purpose of self-adjustment of the gap.

Claims

1. A wet brake with integrated driving and stopping function, characterized in that: The invention comprises a brake assembly (4), wherein the brake assembly (4) is symmetrically arranged on both sides of a main differential assembly (6), one end of the brake assembly (4) is connected to the main differential assembly (6), and the other end of the brake assembly (4) is connected to a bridge housing (3); The brake assembly (4) comprises a brake housing (24), one end of which is connected to the axle housing (3), and the other end of which is connected to the main reduction differential assembly (6). A brake pressure seat (13) is provided between the brake housing (24) and the axle housing (3); a parking brake piston (18) and a service brake piston (19) are provided in the brake housing (24), a parking oil chamber (16) is provided between the parking brake piston (18) and the brake housing (24), a service brake piston (19) is provided between the parking brake piston (18) and the brake housing (24), and a service oil chamber (20) is provided between the service brake piston (19) and the brake housing (24); the parking brake piston (18) is connected to the main reduction differential assembly (6).

2. The integrated wet brake according to claim 1, characterized in that: A seal is provided at the connection between the parking brake piston (18) and the brake housing (24); a disc spring (17) is provided between the parking brake piston (18) and the main reduction differential assembly (6); the brake pressure seat (13) is connected to the brake housing (24); and the bridge housing (3) is connected to the brake housing (24) via the brake pressure seat (13).

3. The integrated wet brake according to claim 2, characterized in that: The brake seat (13) is provided with a stepped hole and a through hole, and a spring sleeve (14) and a hexagon socket bolt (15) are provided in the stepped hole, and the hexagon socket bolt (15) passes through the spring sleeve (14) and is connected to the brake housing (24); a return spring (21) and a hexagon socket bolt (22) are provided in the through hole, and the hexagon socket bolt (22) passes through the return spring (21) and is connected to the brake housing (24); a parking release bolt (25) passes through the bridge housing (3) and abuts against the brake seat (13).

4. The integrated wet brake according to claim 2, characterized in that: The main reduction differential assembly (6) includes a differential bearing seat (23), the parking brake piston (18) is connected to the shoulder of the differential bearing seat (23), and the disc spring (17) is provided between the parking brake piston (18) and the differential bearing seat (23).

5. The integrated wet brake according to claim 4, characterized in that: The invention also comprises a brake assembly, wherein the brake assembly comprises a plurality of dual steel plates (11) and friction plates (12), wherein the dual steel plates (11) are connected to the brake housing (24) via a spline, and the friction plates (12) are connected to the universal joint shaft (29) via a spline, and the plurality of dual steel plates (11) and friction plates (12) are arranged in an alternating manner and in parallel.

6. The integrated wet brake according to claim 3, characterized in that: The brake housing (24) is provided with a parking brake air bleed port (26), a service brake oil port (27), a parking brake oil port (28) and a service brake air bleed port (30), and the service brake oil port (27) and the parking brake oil port (28) are connected to an oil pump.

7. The parking integrated wet brake according to claim 3, characterized in that: The spring sleeve (14) is a cylindrical spring sleeve, the cylindrical inclined surface of the cylindrical spring sleeve is provided with a groove, and the die-pulling angle of the cylindrical inclined surface is 1° to 4°.

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