A large-ratio high-torque wet brake drive

Abstract

The present application relates to the technical fields of vehicle drive transmission, and discloses a high-speed-ratio high-torque wet brake driver, which comprises a shell assembly, a power input module, a three-stage planetary reducer and a wheel hub assembly are installed in the shell assembly, a wet brake assembly is installed between the power input module and the three-stage planetary reducer, a circulating cavity is formed in the shell assembly, an oil pump is fixedly installed in the circulating cavity, a filter core and a magnetic adsorber for filtering oil are fixedly installed in the circulating cavity, a cleaning mechanism for cleaning the filter core and the magnetic adsorber is also fixedly installed in the circulating cavity, a residue treatment mechanism connected with the circulating cavity is installed in the shell assembly, and a heat dissipation mechanism for heat dissipation of oil is installed in the circulating cavity.

Description

Technical Field

[0001] This invention relates to the field of vehicle drive transmission technology, specifically to a high-ratio, high-torque wet brake actuator. Background Technology

[0002] As the logistics and transportation industry upgrades towards "large tonnage, high efficiency, and low energy consumption," the requirements for the driving performance of large tonnage vehicles in scenarios such as airports and ports have significantly increased: on the one hand, they need to meet the requirements of high torque output to drive heavy-duty vehicles; on the other hand, they need to adapt to the high input speed of electric power sources, while also having reliable braking functions to ensure operational safety.

[0003] Among them, the wet brake actuator is a heavy-duty travel drive component that integrates drive transmission and a fully enclosed oil-cooled wet multi-disc brake. The brake friction pair is immersed in sealed oil, and braking and release are controlled by hydraulic and pneumatic pressure. It has the characteristics of good heat dissipation, smooth braking, dustproof and waterproof, maintenance-free, long service life, and explosion-proof safety. It is widely used in heavy-duty equipment under harsh working conditions such as construction machinery, mining vehicles, and forklifts.

[0004] However, existing high-ratio, high-torque wet brake drives still have problems. Under long-term heavy-load continuous operation, the braking friction is continuously working in the cooling oil throughout the process. In addition, the high-ratio transmission meshing impact is strong, and the high torque output is accompanied by intense frictional heat generation. The oil is subjected to multiple effects of high heat load, mechanical shear force and impurity scouring for a long time. As a result, the oil deteriorates, becoming cloudy, with decreased viscosity and reduced extreme pressure anti-wear performance. This is an inevitable physical phenomenon caused by multiple factors such as high-temperature thermal degradation, the mixing of friction debris, and the intrusion of trace amounts of moisture. Moreover, the load intensity of continuous operation is higher and the energy conversion is more intensive, which will significantly accelerate the aging, contamination and performance degradation of the oil under the combined working conditions.

[0005] Therefore, we propose a high-ratio, high-torque wet brake actuator to address the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a high-speed-ratio, high-torque wet brake drive to solve the problems mentioned in the background art, such as the oil becoming turbid and deteriorating under long-term heavy-load continuous operation, and the oil aging, contamination and performance degradation rate also being significantly accelerated under combined operating conditions.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A high-ratio, high-torque wet brake actuator includes a housing assembly. Within the housing assembly are a power input module, a three-stage planetary reducer, and a hub assembly, all integrated along the same coaxial line. A wet brake assembly for braking is installed between the power input module and the three-stage planetary reducer. The housing assembly has a circulation chamber for circulating the hydraulic fluid within the wet brake mechanism. An oil pump for circulating the hydraulic fluid is fixedly installed inside the circulation chamber. A filter element and a magnetic adsorber for filtering the hydraulic fluid are also fixedly installed inside the circulation chamber. A cleaning mechanism for cleaning the filter element and the magnetic adsorber is also fixedly installed inside the circulation chamber. A residue handling mechanism connected to the circulation chamber is installed inside the housing assembly. A heat dissipation mechanism for cooling the hydraulic fluid is also installed inside the circulation chamber.

[0008] Preferably, the cleaning mechanism includes a drive shaft rotatably connected inside the circulation chamber, and a drive fan blade that can be driven by the oil flushing is fixedly connected to the surface of the drive shaft, with the surface of the drive fan blade contacting the surface of the filter element.

[0009] Preferably, a rotatable sleeve is rotatably connected inside the circulation cavity, and the sleeve is rotatably connected to the magnetic suction end of the magnetic adsorber, with the sleeve surface in contact with the drive fan blade.

[0010] Preferably, the surface of the drive fan blade is provided with a plurality of guide grooves for guiding impurities, and the plurality of guide grooves are inclinedly distributed on the surface of the drive fan blade.

[0011] Preferably, the residue treatment mechanism includes a slag collection box threaded onto the surface of the housing assembly, a slag discharge hole connected to the slag collection box is provided inside the circulation cavity, a switch plate is slidably connected to the slag discharge hole, a switch hole for slag discharge is provided on the surface of the switch plate, the switch hole is adapted to the slag discharge hole, and the switch plate is slidably connected inside the housing assembly.

[0012] Preferably, the switch plate surface is threaded with fixing bolts for fixing the switch plate, and the fixing bolts slide on the surface of the housing assembly.

[0013] Preferably, the slag collection box has a slag block fixedly connected inside to adsorb the slag, and the surface of the slag block has a number of slag holes for fixing the slag.

[0014] Preferably, the heat dissipation mechanism includes a plurality of heat dissipation holes formed inside the housing assembly, the plurality of heat dissipation holes surrounding one side of the circulation cavity, and a plurality of heat-conducting plates for facilitating heat dissipation fixedly installed at the connection between the plurality of heat dissipation holes and the circulation cavity.

[0015] Preferably, a lever fan is rotatably connected inside the circulation cavity, and a cooling fan is fixedly connected to one end of the lever fan. The cooling fan is located inside the housing assembly and is located at one end of a plurality of heat dissipation holes.

[0016] Preferably, the surface of the housing assembly is provided with air inlet and outlet holes for introducing external air into the housing assembly, and each air inlet and outlet hole is fixedly connected with a filter screen for dust interception.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are: When the device is running, the oil pump is activated, causing the oil in the wet brake assembly to circulate within the circulation chamber. This allows the oil to be filtered and adsorbed by the filter element and magnetic adsorber, removing impurities from the inside of the oil. Simultaneously, the flow of oil drives the cleaning mechanism, which cleans impurities from the surfaces of the filter element and magnetic adsorber. By filtering and removing impurities from the oil, it can be re-injected into the wet brake assembly, extending its lifespan and ensuring the performance of the wet brake assembly.

[0018] The residue is placed below the drive fan blade, allowing it to enter through the slag discharge hole, then through the switch hole, and finally into the slag collection box. The residue then enters the slag block, where it is secured by a slag hole. To clean or replace the slag block, loosen the fixing bolts, slide the switch plate so that the switch hole slides into the housing assembly, simultaneously blocking the slag discharge hole at one end of the switch plate. The slag collection box can then be removed for easy cleaning of the residue.

[0019] As the oil flows through the circulation chamber, it drives the auxiliary fan to rotate, which in turn drives the cooling fan to rotate. This creates negative pressure inside the cooling vents, allowing external airflow to enter the inlet and outlet vents and reach the cooling vents. The heat from the oil in the circulation chamber is then carried to the cooling vents by the heat-conducting plate. The external airflow then carries the heat out through the inlet and outlet vents. By cooling the oil, emulsification and viscosity reduction are prevented, improving the extreme pressure anti-wear properties of the oil and further reducing the aging rate of the oil. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B.

[0021] The components include: 1. Housing assembly; 2. Power input module; 3. Three-stage planetary reducer; 4. Hub assembly; 5. Wet brake assembly; 6. Circulation chamber; 7. Oil pump; 8. Filter element; 9. Magnetic adsorber; 10. Drive shaft; 11. Drive fan blade; 12. Sleeve; 13. Guide groove; 14. Slag collection box; 15. Slag discharge hole; 16. Switch plate; 17. Switch hole; 18. Fixing bolt; 19. Slag block; 20. Slag hole; 21. Heat dissipation hole; 22. Heat conduction plate; 23. Assisted fan; 24. Cooling fan; 25. Air inlet and outlet holes; 26. Filter screen. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-4 The present invention provides a technical solution: like Figures 1-4 As shown, a high-ratio, high-torque wet brake actuator includes a housing assembly 1. Within the housing assembly 1 are a power input module 2, a three-stage planetary reducer 3, and a hub assembly 4, all integrated along the same coaxial line. A wet brake assembly 5 for braking is installed between the power input module 2 and the three-stage planetary reducer 3. The housing assembly 1 has a circulation chamber 6 for circulating the oil within the wet brake mechanism. An oil pump 7 for driving the oil circulation is fixedly installed inside the circulation chamber 6. A filter element 8 and a magnetic adsorber 9 for filtering the oil are also fixedly installed inside the circulation chamber 6. A cleaning mechanism for cleaning the filter element 8 and the magnetic adsorber 9 is also fixedly installed inside the circulation chamber 6. A residue treatment mechanism connected to the circulation chamber 6 is installed inside the housing assembly 1. A heat dissipation mechanism for cooling the oil is also installed inside the circulation chamber 6.

[0024] like Figures 1-4As shown, the power input module 2 drives the three-stage planetary reducer 3 and the wheel hub assembly 4. When braking is required, the wet brake assembly 5 is activated. During operation, the oil pump 7 is activated, causing the oil in the wet brake assembly 5 to circulate in the circulation chamber 6. The oil is filtered and adsorbed by the filter element 8 and the magnetic adsorber 9. At the same time, the flow of oil drives the cleaning mechanism to clean the impurities on the surface of the filter element 8 and the magnetic adsorber 9. The impurities are then collected by the residue treatment mechanism and stored. Meanwhile, the heat dissipation mechanism can cool the oil. By filtering and removing impurities from the oil, it can be re-injected into the wet brake assembly 5, improving the oil's lifespan and ensuring the performance of the wet brake assembly 5.

[0025] The housing assembly 1, power input module 2, three-stage planetary reducer 3, wheel hub assembly 4, and wet brake assembly 5 are all existing technologies. The housing assembly 1 is an integral support structure, cast from ductile iron. After casting, it undergoes aging treatment to eliminate internal stress. The outer surface of the housing is treated with both cathodic electrophoresis and powder coating for double corrosion protection. The power input module 2 includes an input shaft and a spline sleeve. One end of the input shaft is rigidly connected to the output end of an electric motor or hydraulic pump via a flange, and the other end is connected to the spline sleeve via an involute spline. The input shaft and housing assembly 1 are supported by a double-row angular contact ball bearing. An oil slinger ring is provided on the inner side of the bearing, and a skeleton oil seal is provided on the outer side. The wet brake assembly 5 has dual functions of service braking and parking braking, specifically including… Includes: brake cylinder body, brake piston, friction assembly and parking brake unit, with the brake chamber filled with special brake fluid; a three-stage planetary reducer 3 is assembled in the reduction chamber of the housing assembly 1 to achieve the reduction ratio. Power is input from the spline sleeve, and after three-stage reduction, it is transmitted to the wheel hub assembly 4. The gears, bearings and lubrication system are optimized for high reliability; the wheel hub assembly 4 is assembled in the wheel hub cavity of the housing assembly 1 to transmit the power of the three-stage planetary reducer 3 to the vehicle wheels. The bearing protection, wheel hub strength and sealing are optimized for high reliability; the three-stage planetary reducer 3 structure achieves a large reduction ratio. Combined with the wet brake assembly 5 integrated at the input end and the high-strength wheel hub assembly 4, it achieves high output torque and high input speed, which will not be elaborated further here.

[0026] Furthermore, such as Figure 3 As shown, the cleaning mechanism includes a drive shaft 10 rotatably connected inside the circulation chamber 6. A drive fan blade 11, which can be driven by the oil flushing, is fixedly connected to the surface of the drive shaft 10. The surface of the drive fan blade 11 contacts the surface of the filter element 8. A rotatable sleeve 12 is rotatably connected inside the circulation chamber 6. The sleeve 12 is rotatably connected to the magnetic suction end of the magnetic adsorber 9, which also allows the surface of the sleeve 12 to adsorb impurities and iron filings. The surface of the sleeve 12 contacts the drive fan blade 11. The surface of the drive fan blade 11 is provided with several guide grooves 13 to guide impurities. The several guide grooves 13 are inclinedly distributed on the surface of the drive fan blade 11.

[0027] When the oil flows in the circulation chamber 6, it drives the drive fan blade 11 to rotate, so that the drive fan blade 11 scrapes off the residue on the surface of the filter element 8 and the sleeve 12. At the same time, the residue is guided to the bottom of the drive fan blade 11 through several guide grooves 13 on the surface of the drive fan blade 11.

[0028] Furthermore, such as Figure 3 As shown, the residue treatment mechanism includes a residue collection box 14 threadedly connected to the surface of the housing assembly 1. A residue discharge hole 15 connected to the residue collection box 14 is provided inside the circulation chamber 6. A switch plate 16 is slidably connected to the residue discharge hole 15. A switch hole 17 for residue discharge is provided on the surface of the switch plate 16. The switch hole 17 is adapted to the residue discharge hole 15. The switch plate 16 is slidably connected inside the housing assembly 1. A fixing bolt 18 for fixing the switch plate 16 is threadedly connected to the surface of the switch plate 16. At the same time, the fixing bolt 18 slides on the surface of the housing assembly 1. A residue block 19 for adsorbing residue is fixedly connected inside the residue collection box 14. A number of residue holes 20 for fixing residue are provided on the surface of the residue block 19.

[0029] By placing the residue below the drive fan blade 11, the residue enters through the slag discharge hole 15, then through the switch hole 17, and finally into the slag collection box 14. The residue then enters the residue block 19, where it is fixed by the residue hole 20. When the residue block 19 needs to be cleaned or replaced, loosen the fixing bolt 18, then slide the switch plate 16 so that the switch hole 17 slides into the housing assembly 1. At the same time, one end of the switch plate 16 blocks the slag discharge hole 15. Then the slag collection box 14 can be removed for easy cleaning of the residue.

[0030] Furthermore, such as Figure 1 and Figure 4 As shown, the heat dissipation mechanism includes several heat dissipation holes 21 opened inside the housing assembly 1. The several heat dissipation holes 21 surround one side of the circulation cavity 6. Several heat-conducting plates 22 are fixedly installed at the connection between the several heat dissipation holes 21 and the circulation cavity 6 to facilitate heat dissipation. A booster fan 23 is rotatably connected inside the circulation cavity 6. A cooling fan 24 is fixedly connected to one end of the booster fan 23. The cooling fan 24 is located inside the housing assembly 1 and at one end of the several heat dissipation holes 21. An air inlet and outlet hole 25 is opened on the surface of the housing assembly 1 to introduce external air force into the housing assembly 1. A filter screen 26 for dust interception is fixedly connected inside the air inlet and outlet hole 25.

[0031] As the oil flows within the circulation chamber 6, it drives the auxiliary fan 23 to rotate, which in turn drives the cooling fan 24 to rotate. This creates negative pressure inside the cooling vent 21, allowing external airflow to enter the inlet / outlet vent 25 and reach the cooling vent 21. The heat from the oil in the circulation chamber 6 is then carried to the cooling vent 21 by the heat-conducting plate 22. The external airflow then carries the heat out through the inlet / outlet vent 25. By cooling the oil, emulsification and viscosity reduction are prevented, the extreme pressure anti-wear properties of the oil are improved, and the aging rate of the oil is further reduced.

[0032] The working principle of this high-ratio, high-torque wet brake actuator is as follows: When the device is running, the oil pump 7 is started, causing the oil in the wet brake assembly 5 to circulate in the circulation chamber 6. The oil is then filtered and adsorbed by the filter element 8 and the magnetic adsorber 9. As the oil flows in the circulation chamber 6, it drives the drive fan blade 11 to rotate, causing the drive fan blade 11 to scrape off the residue on the surface of the filter element 8 and the sleeve 12. At the same time, the residue is guided to the bottom of the drive fan blade 11 by several guide grooves 13 on the surface of the drive fan blade 11. By filtering and removing impurities from the oil, the oil can be reinjected into the wet brake assembly 5, improving the oil life and ensuring the performance of the wet brake assembly 5.

[0033] By placing the residue below the drive fan blade 11, the residue enters through the slag discharge hole 15, then through the switch hole 17, and finally into the slag collection box 14. The residue then enters the residue block 19, where it is fixed by the residue hole 20. When the residue block 19 needs to be cleaned or replaced, loosen the fixing bolt 18, then slide the switch plate 16 so that the switch hole 17 slides into the housing assembly 1. At the same time, one end of the switch plate 16 blocks the slag discharge hole 15. Then the slag collection box 14 can be removed for easy cleaning of the residue.

[0034] As the oil flows within the circulation chamber 6, it drives the auxiliary fan 23 to rotate, which in turn drives the cooling fan 24 to rotate. This creates negative pressure inside the cooling vent 21, allowing external airflow to enter the inlet / outlet vent 25 and reach the cooling vent 21. The heat from the oil in the circulation chamber 6 is then carried to the cooling vent 21 by the heat-conducting plate 22. The external airflow then carries the heat out through the inlet / outlet vent 25. By cooling the oil, emulsification and viscosity reduction are prevented, the extreme pressure anti-wear properties of the oil are improved, and the aging rate of the oil is further reduced.

[0035] Although specific embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-ratio, high-torque wet brake actuator, comprising a housing assembly (1), characterized in that, The housing assembly (1) is equipped with a power input module (2), a three-stage planetary reducer (3) and a hub assembly (4) integrated along the same coaxial line. A wet brake assembly (5) for braking is installed between the power input module (2) and the three-stage planetary reducer (3). A circulation chamber (6) is provided inside the housing assembly (1) to facilitate the circulation of oil in the wet brake mechanism. An oil pump (7) for driving the oil circulation is fixedly installed inside the circulation chamber (6). A filter element (8) for filtering the oil and a magnetic adsorber (9) are fixedly installed inside the circulation chamber (6). A cleaning mechanism for cleaning the filter element (8) and the magnetic adsorber (9) is also fixedly installed inside the circulation chamber (6). A residue treatment mechanism connected to the circulation chamber (6) is installed inside the housing assembly (1). A heat dissipation mechanism for cooling the oil is installed inside the circulation chamber (6).

2. The high-ratio, high-torque wet brake actuator according to claim 1, characterized in that: The cleaning mechanism includes a drive shaft (10) rotatably connected inside the circulation chamber (6), and a drive fan blade (11) that can be driven by the oil flushing is fixedly connected to the surface of the drive shaft (10), and the surface of the drive fan blade (11) contacts the surface of the filter element (8).

3. The high-ratio, high-torque wet brake actuator according to claim 2, characterized in that: The circulating cavity (6) is rotatably connected to a rotatable sleeve (12), which is rotatably connected to the magnetic suction end of the magnetic adsorber (9). The surface of the sleeve (12) is in contact with the driving fan blade (11).

4. A high-ratio, high-torque wet brake actuator according to claim 2, characterized in that: The surface of the drive blade (11) is provided with a number of guide grooves (13) for guiding impurities, and the number of guide grooves (13) are inclinedly distributed on the surface of the drive blade (11).

5. A high-ratio, high-torque wet brake actuator according to claim 1, characterized in that: The residue treatment mechanism includes a slag collection box (14) threadedly connected to the surface of the housing assembly (1), a slag discharge hole (15) connected to the slag collection box (14) is provided inside the circulation cavity (6), a switch plate (16) is slidably connected to the slag discharge hole (15), a switch hole (17) for slag discharge is provided on the surface of the switch plate (16), the switch hole (17) is adapted to the slag discharge hole (15), and the switch plate (16) is slidably connected inside the housing assembly (1).

6. A high-ratio, high-torque wet brake actuator according to claim 5, characterized in that: The switch plate (16) is threaded with a fixing bolt (18) for fixing the switch plate (16), and the fixing bolt (18) slides on the surface of the housing assembly (1).

7. A high-ratio, high-torque wet brake actuator according to claim 6, characterized in that: The slag collection box (14) is fixedly connected to a slag block (19) for adsorbing slag. The surface of the slag block (19) is provided with several slag holes (20) for fixing the slag.

8. A high-ratio, high-torque wet brake actuator according to claim 1, characterized in that: The heat dissipation mechanism includes a plurality of heat dissipation holes (21) opened inside the housing assembly (1), the plurality of heat dissipation holes (21) surround one side of the circulation cavity (6), and a plurality of heat-conducting plates (22) for heat dissipation are fixedly installed at the connection between the plurality of heat dissipation holes (21) and the circulation cavity (6).

9. A high-ratio, high-torque wet brake actuator according to claim 8, characterized in that: The circulation cavity (6) is rotatably connected to a lever fan (23), and a cooling fan (24) is fixedly connected to one end of the lever fan (23). The cooling fan (24) is located inside the housing assembly (1) and is located at one end of several heat dissipation holes (21).

10. A high-ratio, high-torque wet brake actuator according to claim 9, characterized in that: The housing assembly (1) has air inlet and outlet holes (25) on its surface, which are used to introduce external wind into the housing assembly (1). Each air inlet and outlet hole (25) is fixedly connected with a filter screen (26) for dust interception.

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