Wet brake
By integrating driving and parking functions in wet brakes and using the design of through cooling oil passages and multiple cooling passages, the problems of insufficient braking torque and overheating of friction plates are solved, and higher braking torque and reliability are achieved. Meet the needs of off-highway heavy-load vehicles.
Patent Information
- Application Number
- CN202421119420.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing wet brakes fail to integrate the driving brake with parking brake, resulting in insufficient braking torque and overheating of the friction plate, which leads to slope slips and brake failures.
A wet brake including a friction plate mount, an actuator base, a driving piston and a parking piston is designed. The friction plate is efficiently cooled through the through cooling oil passage and multiple cooling passages, and the double helix with different diameters is used. Parking springs and staggered friction plates are provided to improve braking torque and reliability.
It achieves a greater braking torque, has integrated parking functions, excellent cooling performance, high reliability and long life, meeting the needs of non-highway heavy-load vehicles.
Smart Images
Figure CN222351249U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of commercial vehicle parts, in particular to a wet brake. Background Art
[0002] Wide-body mining dump trucks are the most widely used tools in mining and transportation operations. They are heavy-loaded and have poor road conditions, which puts a more stringent test on the vehicle's drive system, especially the drive axle braking system, which is more important for the safety and reliability of vehicle operation. Most existing conventional structures use drum or disc brakes. Although such brakes can basically meet the vehicle's driving braking needs, for parking brakes in harsh working conditions, they often cause slippage due to insufficient braking torque, which can easily lead to accidents.
[0003] In order to solve the problem of insufficient braking torque of conventional brakes, multi-friction wet brakes are often used to solve the problem. However, existing conventional wet brakes fail to integrate the driving brake and the parking brake into an integrated design. At the same time, the parking brake is mostly actuated by a single spring, resulting in discontinuity in driving or parking braking and insufficient parking braking force. At the same time, the problem of sufficient cooling of the friction plate is not considered, resulting in excessive temperature of the friction plate during braking, which in turn leads to the occurrence of brake failure. Utility Model Content
[0004] The purpose of the utility model is to provide a wet brake to address the deficiencies of the prior art. Compared with conventional drum or disc brakes, the wet brake has a larger braking torque and can better meet the use requirements of off-road heavy-duty vehicles. At the same time, compared with conventional wet brakes, the wet brake has an integrated driving and parking function, excellent cooling performance, high reliability and long service life.
[0005] The utility model is realized by adopting the following technical solutions:
[0006] A wet brake comprises a wheel hub and the wet brake, wherein the wet brake is provided with a friction plate mounting seat and an actuator base, the wheel hub is provided with a brake mounting plate, the friction plate mounting seat and the actuator base are connected to the brake mounting plate in sequence through connecting bolts, the brake mounting plate and the actuator base are provided with a through cooling oil passage; a plurality of sealing assemblies are provided at the connection between the wet brake and the wheel hub.
[0007] Furthermore, the friction plate mounting seat is provided with a plurality of friction plates arranged alternately with each other, a pressure plate is provided between the friction plate mounting seat and the actuator base, one end of the pressure plate abuts against the friction plate, and the other end of the pressure plate abuts against the actuator base.
[0008] Furthermore, the actuator base is provided with a parking piston and a driving piston, a parking brake release chamber is provided between the parking piston and the actuator base, a driving brake chamber is provided between the driving piston and the actuator base, the driving piston abuts against the pressure plate, and a parking spring is provided in the parking piston.
[0009] Furthermore, the number of the parking piston and the driving piston is ≥2, and the inner diameter of the driving piston is larger than the outer diameter of the parking piston.
[0010] Furthermore, the wheel hub is provided with a spline connection journal and a cooling channel, the cooling channel is arranged along the circumference of the wheel hub, the number of the cooling channels is ≥2, the cooling channel is located in the middle of the spline connection journal, and the spline connection journal is connected to the friction plate.
[0011] Furthermore, the parking spring is a double helical spring with different diameters.
[0012] Compared with the prior art, the utility model has the following beneficial technical effects:
[0013] Compared with conventional drum or disc brakes, the utility model has a larger braking torque and can better meet the use requirements of off-road heavy-duty vehicles. At the same time, compared with conventional wet brakes, it has the advantages of integrated driving and parking functions, excellent cooling performance, high reliability, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 It is a schematic diagram of the structure of the wheel hub in this utility model;
[0016] Figure 3 It is a schematic diagram of the flow direction of cooling oil in the cooling channel of the utility model.
[0017] Reference numerals
[0018] 1. Wheel hub; 11. Cooling oil channel; 12. Spline connecting journal; 13. Connecting bolts; 2. Sealing assembly; 3. Friction plate mounting seat; 4. Friction plate; 5. Pressure plate; 6. Service piston; 7. Parking piston; 8. Parking spring; 9. Actuator base; 91. Parking brake release chamber; 92. Service brake chamber; 10. Brake mounting plate; 14. Cooling oil inlet; 15. Cooling oil outlet. DETAILED DESCRIPTION
[0019] 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.
[0020] like Figure 1-Figure 2 As shown, a wet brake comprises a wheel hub 1 and a wet brake, wherein the wet brake is provided with a friction plate mounting seat 3 and an actuator base 9, the wheel hub 1 is provided with a brake mounting plate 10, the friction plate mounting seat 3 and the actuator base 9 are connected to the brake mounting plate 10 in sequence through connecting bolts 13, the brake mounting plate 10 and the actuator base 9 are provided with a through cooling channel, and the cooling channel is connected to the wheel hub 1; a plurality of sealing components 2 are provided at the connection between the wet brake and the wheel hub 1.
[0021] The friction plate mounting seat 3 is provided with a plurality of friction plates 4 arranged alternately with each other. A pressure plate 5 is provided between the friction plate mounting seat 3 and the actuator base 9. One end of the pressure plate 5 abuts against the friction plate 4, and the other end of the pressure plate 5 abuts against the actuator base 9.
[0022] The actuator base 9 is provided with a parking piston 7 and a driving piston 6. A parking brake release chamber 91 is provided between the parking piston 7 and the actuator base 9. A driving brake chamber 92 is provided between the driving piston 6 and the actuator base 9. The driving piston 6 abuts against the pressure plate 5. A parking spring 8 is provided in the parking piston 7.
[0023] The number of the parking piston 7 and the driving piston 6 is ≥2, and the inner diameter of the driving piston 6 is larger than the outer diameter of the parking piston 7 .
[0024] The wheel hub 1 is provided with a spline connection journal 12 and a cooling oil passage 11. The cooling oil passage 11 is arranged along the circumference of the wheel hub 1. The number of the cooling oil passages 11 is ≥2. The cooling oil passage 11 is located in the middle of the spline connection journal 12. The spline connection journal 12 is connected to the friction plate 4, and the cooling oil passage 11 is connected to the cooling channel.
[0025] The parking spring 8 is a double helical spring with different diameters.
[0026] The braking process of the utility model is:
[0027] During service braking, the service brake chamber 92 and the parking brake release chamber 91 are both in a high-pressure state. The parking piston 7 is in a retracted state under the action of the high pressure in the parking brake release chamber 91, and does not produce an extrusion effect on the service piston 6. The service piston 6 is pushed forward under the action of the high pressure in the service brake chamber 92, causing the friction plates 4 to be squeezed against each other to complete service braking.
[0028] During parking braking, the service brake chamber 92 and the parking brake release chamber 91 are both in a depressurized state. At this time, the pressure plate 5 is pushed forward by the service piston 6 and the parking piston 7 at the same time under the action of the parking spring 8, causing the friction plates 4 to be squeezed against each other to complete the parking braking.
[0029] During normal driving, the parking brake release chamber 91 is in a high pressure state, the parking piston 7 is in a retracted state under the high pressure in the parking brake release chamber 91, and does not produce an extrusion effect on the driving piston 6. The driving brake chamber 92 is in a depressurized state, and the driving piston 6 itself cannot move forward, so the friction plates 4 cannot be squeezed against each other, and normal driving is achieved.
[0030] like Figure 3 As shown, the flow direction of the wet brake cooling oil first enters the inner hole of the spline connection journal 12 through the cooling oil inlet 14 of the cooling channel, flows from the inside to the outside through the cooling oil channel 11 to the outermost side of the friction plate 4, and then flows through the gap between the pressure plate 5 and the actuator base 9 to the cooling oil outlet 15 of the cooling channel.
Claims
1. A wet brake, characterized in that: The invention comprises a wheel hub (1) and the wet brake, wherein the wet brake is provided with a friction plate mounting seat (3) and an actuator base (9), the wheel hub (1) is provided with a brake mounting plate (10), the friction plate mounting seat (3) and the actuator base (9) are connected to the brake mounting plate (10) in sequence through connecting bolts (13), the brake mounting plate (10) and the actuator base (9) are provided with a through cooling channel, and the cooling channel is connected to the wheel hub (1); a plurality of sealing components (2) are provided at the connection between the wet brake and the wheel hub (1).
2. The wet brake according to claim 1, characterized in that: The friction plate mounting seat (3) is provided with a plurality of friction plates (4) arranged in an interlaced manner, and a pressure plate (5) is provided between the friction plate mounting seat (3) and the actuating body base (9), one end of the pressure plate (5) abuts against the friction plate (4), and the other end of the pressure plate (5) abuts against the actuating body base (9).
3. The wet brake according to claim 2, characterized in that: The actuator base (9) is provided with a parking piston (7) and a driving piston (6); a parking brake release chamber (91) is provided between the parking piston (7) and the actuator base (9); a driving brake chamber (92) is provided between the driving piston (6) and the actuator base (9); the driving piston (6) is in contact with the pressure plate (5); and a parking spring (8) is provided in the parking piston (7).
4. The wet brake according to claim 3, characterized in that: The number of the parking piston (7) and the driving piston (6) is ≥2, and the inner diameter of the driving piston (6) is greater than the outer diameter of the parking piston (7).
5. The wet brake according to claim 4, characterized in that: The wheel hub (1) is provided with a spline connection journal (12) and a cooling oil passage (11). The cooling oil passage (11) is arranged along the circumference of the wheel hub (1). The number of the cooling oil passages (11) is ≥2. The cooling oil passage (11) is located in the middle of the spline connection journal (12). The spline connection journal (12) is connected to the friction plate (4), and the cooling oil passage (11) is connected to the cooling channel.
6. The wet brake according to claim 3, characterized in that: The parking spring (8) is a double helical spring with different diameters.