Mechanical wet-type braking system integrating running braking and parking braking and braking method of mechanical wet-type braking system

Abstract

The invention relates to a mechanical wet braking system integrating running braking and parking braking and a braking method of the mechanical wet braking system, and belongs to the field of vehicle braking. The device comprises a brake-by-wire explosion-proof motor, a first-stage worm and gear reducing mechanism, a second-stage bevel gear reducing mechanism, a frustum pushing mechanism, a brake mechanism and a hub mounting seat, the first-stage worm and gear reducing mechanism comprises a brake worm, a transmission worm gear, a worm gear output rod and a worm gear shell, an output shaft of the brake-by-wire explosion-proof motor is connected with the end of the brake worm, and the brake worm and the transmission worm gear are arranged in the worm gear shell; the secondary bevel gear speed reducing mechanism comprises a transmission case shell, a bevel gear, a secondary transmission gear and a transmission frustum, and the secondary transmission gear is externally meshed with the bevel gear. The brake explosion-proof motor is controlled by a wire to rotate, the transmission worm and worm gear, the bevel gear, the secondary transmission gear, the transmission frustum and the transmission cam are integrated to move, large-scale amplification of braking force and self-locking of the structure are achieved, and the requirement of traveling parking braking for a mechanical structure is met.

Description

Technical Field

[0001] The invention relates to a mechanical wet brake system integrating driving and parking brakes and a braking method thereof, belonging to the field of vehicle braking. Technical Background

[0002] Mining vehicles are continuously developing towards a diversified powertrain landscape. An increasing number of hybrid, hydrogen fuel cell hybrid, and pure electric mining vehicles are entering service in mining operations, making new energy mining vehicles a key component of mining production and transportation. Compared to traditional vehicles, new energy mining vehicles offer advantages such as environmental friendliness, low failure rates, and greater ease of electronic control. Therefore, implementing autonomous driving on these new energy vehicles is an effective means of improving mine production and transportation, ensuring transport quality, and enhancing vehicle comfort. It also meets the current technological requirements for mining vehicles in the development of smart mines.

[0003] Unmanned driving technology, a crucial component of smart mine construction, is a crucial element in forming a smart mining system characterized by comprehensive perception, real-time connectivity, autonomous learning, and collaborative control. As a hot research area in the automotive sector, it has also garnered significant attention from all sectors of society. Furthermore, as a key component of vehicle technological innovation and the core technology of intelligent vehicles, the wire-controlled chassis eliminates hydraulic or mechanical connections and instead utilizes electrical control. This unique advantage offers fast response speeds and high control precision, perfectly meeting the needs of intelligent, electrified, and lightweight vehicle development, and is a key enabler for achieving unmanned driving.

[0004] However, the current braking system for mining vehicles still uses pressure relief hydraulic braking as the main form of braking. The braking system currently equipped on mining vehicles is mainly a pressure relief braking system. During braking, the brake fluid in the brake piston cavity is discharged, and the brake return spring presses the brake piston to achieve braking. The braking response speed is affected by the brake fluid discharge rate and the properties of the spring. At the same time, due to factors such as the resistance of the brake fluid, the braking force is difficult to control accurately, and the vehicle comfort is poor during braking, which makes it difficult to meet the requirements of intelligent vehicles for precise chassis braking force.

[0005] At the same time, because they operate in harsh environments such as high temperatures, severe vibration, dust, and rain, strict requirements are placed on the reliability and safety of the braking system. Its performance directly affects the safety of the entire vehicle. Therefore, researching a wire-controlled mechanical braking system that meets the requirements of innovation, miniaturization, structural redundancy, and precise control of clamping force is of great significance to promoting innovation in vehicle braking system technology and promoting the wire-controlled and intelligent development of mining vehicle chassis.

[0006] Therefore, in order to meet the needs of intelligence, it is urgent to study the structure and control architecture of the braking system of mining vehicles. Summary of the Invention

[0007] In response to the above problems, the present invention provides a mechanical wet brake system and a braking method thereof that integrates driving and parking brakes, which can quickly achieve braking response, meet the structural requirements of driving brakes and parking brakes, and easily achieve precise control of braking force.

[0008] To achieve the above object, the technical solution adopted by the present invention is: It includes a brake-by-wire explosion-proof motor, a first-stage worm gear reduction mechanism, a second-stage bevel gear reduction mechanism, a cone sliding mechanism, a brake mechanism and a wheel hub mounting seat; The first-stage worm gear reduction mechanism includes a brake worm, a transmission worm wheel, a turbine output rod and a worm wheel housing. The output shaft of the wire-controlled explosion-proof motor is connected to the end of the brake worm. The brake worm and the transmission worm wheel are arranged in the worm wheel housing. The turbine output rod is connected to the center of the transmission turbine. The secondary bevel gear reduction mechanism includes a transmission case housing, a bevel gear, a secondary transmission gear and a transmission cone, the secondary transmission gear is externally meshed with the bevel gear, the transmission cone is arranged on the side of the secondary transmission gear and is coaxial, the bevel gear is connected to the transmission worm gear through a brake shaft, the secondary transmission gear and the transmission cone are located in the transmission case housing, and the transmission case housing has an installation cavity opening on the transmission cone side; The frustum pushing mechanism includes a ball and a cylindrical transmission cam arranged at the end surface of the transmission frustum, the ball rollingly transmits the transmission to the cam surface, and the other end surface of the transmission cam is provided with a return spring; The brake mechanism includes a brake cavity, a brake friction plate and a fixed steel plate. The brake friction plate and the fixed steel plate are circular with a hole in the middle, and multiple plates are stacked at intervals. The brake cavity is provided with a cylindrical cavity. The circumference of the brake friction plate is concave-convexly matched with the inner wall of the cylindrical cavity. A rotating plate mounting platform is provided in the middle of the cylindrical cavity. The middle hole of the fixed steel plate is provided with a concave-convexly matched with the rotating plate mounting platform. A sealing cover is installed on the side opening of one side of the brake cavity. A brake hole is provided in the middle of the sealing cover. A transmission cam is passed through the brake hole. A return spring is in the brake cavity and sleeved on the movable plate mounting platform, and its end contacts the fixed steel plate. The wheel hub mounting seat is arranged on the other side of the brake cavity, and the side end surface of the sealing cover of the brake cavity is sealed and connected to the transmission box shell through a flange.

[0009] According to the mechanical wet brake system integrating driving and parking brakes, a transmission connection boss is provided on the peripheral surface of the transmission case housing, and the transmission connection boss is installed on the transmission connection boss. worm gear housing A hole is provided in the middle of the transmission connection boss and the end face of the worm gear housing to install the brake shaft, and the bevel gear and transmission worm gear are provided at both ends of the brake shaft.

[0010] According to the mechanical wet brake system integrating driving and parking brakes, The worm gear housing is divided into The worm gear cavity and the worm cavity, a flange is provided at the contact surface of the worm gear cavity and the worm cavity and a shell fastening bolt hole is opened, and the shell fastening bolt hole is provided with a worm gear shell fastening bolt hole to fix the worm gear cavity and the worm cavity.

[0011] According to the mechanical wet brake system integrating driving and parking brakes, a transmission cam is provided with a motion slide groove on the circumferential surface on the return spring side, a sealing cover bracket is provided in the middle of the middle brake hole of the sealing cover, the sealing cover bracket is connected to the sealing cover through the slide groove limiter, the transmission cam is embedded in the fan-shaped ring between the sealing cover bracket and the sealing cover, and the slide groove limiter is embedded in the motion slide groove.

[0012] According to the mechanical wet brake system integrating driving and parking brakes, a wheel hub connecting platform is provided on the outside of the brake cavity, a wheel hub connecting platform hole is provided on the outer circumference of the wheel hub connecting platform, a wheel hub mounting seat is provided on the other side of the wheel hub connecting platform, a protective cover mounting hole is provided at one end of the wheel hub mounting seat, and the wheel hub connecting platform is provided with the integrated rotating plate mounting platform in the brake cavity.

[0013] According to the mechanical wet brake system integrating driving and parking brakes, a brake device heat dissipation oil inlet is provided on the circumferential outer wall of the brake cavity.

[0014] According to the mechanical wet brake system integrating driving and parking brakes, the outer circumference of the brake friction pad is provided with a brake friction pad mounting boss, the inner circumference of the fixed steel plate is provided with a steel plate mounting boss, the brake friction pad and the fixed steel plate are alternately mounted on the rotating plate mounting platform, the inner wall of the cylindrical cavity of the brake cavity is provided with a friction pad mounting groove, the brake friction pad mounting boss is installed in the friction pad mounting groove, the rotating plate mounting platform is provided with a rotating plate mounting groove, and the steel plate mounting boss is installed in the rotating plate mounting groove.

[0015] According to the mechanical wet brake system integrating driving and parking brakes, a shaft support platform is provided on the circumferential surface of the transmission case housing, the transmission connection boss is connected to the shaft support platform by bolts, and a transmission case connection cam is provided around the opening of the mounting cavity of the transmission case housing, and the transmission case connection cam is provided with a connection hole which is connected to the sealing cover side of the brake cavity through the transmission case connection cam connection bolts.

[0016] According to the mechanical wet brake system with integrated driving and parking brakes, a sealing cover sealing screw hole is provided in the circumferential direction of the sealing cover, and the sealing cover sealing screw hole is connected to the cavity sealing bolt hole provided on one end face of the brake cavity, and a cavity connecting boss is provided on the end face of the brake cavity, and a cavity connecting bolt hole is provided in the circumferential direction of the cavity connecting boss, and the other end face of the brake cavity is fixedly connected to the shaft end connecting hole provided at the circumference of the brake cavity cover, and the brake cavity cover is fixed on the wheel hub connecting platform.

[0017] The braking method of the mechanical wet braking system integrating driving and parking brakes of the present invention is characterized in that: When the vehicle is braking, the brake-by-wire explosion-proof motor of the device outputs the braking motor torque after receiving the braking signal, dragging the transmission worm to rotate. The transmission worm rotates and engages with the transmission worm wheel to achieve the first speed reduction and torque increase, and has a reverse locking function. After the transmission worm wheel rotates, it drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The bevel gear rotates and engages with the secondary transmission gear to achieve the second speed reduction and torque increase. After the second-stage transmission gear rotates, it drives the transmission cone to rotate. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to achieve the function of converting rotation into linear motion. The transmission cam presses the brake friction plate and the fixed steel plate through the motion slide to achieve service braking; When a mining vehicle is parked, the explosion-proof motor of the brake-by-wire system drives the transmission worm and the transmission worm wheel to rotate at a certain angle. At the same time, the rotation of the transmission worm wheel drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The rotation of the bevel gear engages the secondary transmission gear. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to realize the function of converting rotation into linear motion. After the explosion-proof motor of the brake-by-wire system is powered off, the mechanical self-locking function of the transmission worm and the transmission worm wheel can be used to realize parking braking.

[0018] The advantages of the invention are: 1. Through the rotation of the explosion-proof brake-by-wire motor, the integrated transmission worm, transmission worm wheel, bevel gear, second-stage transmission gear, transmission cone and transmission cam movement achieves a large-scale amplification of the braking force and structural self-locking, meeting the mechanical structure requirements of driving and parking brakes; 2. The combination of the worm gear transmission mechanism and the gear system cam transmission system realizes the integration, miniaturization and structural redundancy design of the wire-controlled mechanical wet brake system, ensuring the functional safety of the brake system; 3. The braking force boosting form of explosion-proof motor plus mechanical transmission replaces the traditional pressure relief wet brake, ensuring the precise control of braking force, improving the braking response speed and ensuring driving safety; BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A top view of the wire-controlled wet brake system of the present invention, Figure 2 Side view of the wire-controlled wet brake system of the present invention, Figure 3 A three-dimensional diagram of the wire-controlled wet brake system of the present invention, Figure 4 Partial exploded view of the wire-controlled wet brake system of the present invention, Figure 5 The structural diagram of the cam transmission system of the wire-controlled wet brake system of the present invention, Figure 6 The brake friction pad installation diagram of the wire-controlled wet brake system of the present invention, Figure 7 Internal structure diagram of the brake cavity of the wire-controlled wet brake system of the present invention Figure 1 , Figure 8 Internal structure diagram of the brake cavity of the wire-controlled wet brake system of the present invention Figure 2 , Figure 9 A cross-sectional view of the brake cavity of the wire-controlled wet brake system of the present invention, Figure 10 Exploded view of the transmission structure of the wire-controlled wet brake system of the present invention. Figure numerals: 1 control brake explosion-proof motor, 2 brake worm, 3 transmission case housing, 4 housing fastening bolt hole, 5 worm gear housing, 6 heat dissipation oil inlet, 7 brake cavity, 8 cavity connection boss, 9 wheel hub mounting seat, 10 wheel hub connection platform, 11 cam transmission housing connection cam, 12 cam transmission housing, 13 shaft support platform, 14 transmission connection boss, 15 vehicle half-axle support seat, 16 transmission housing connection cam connection bolt, 17 cavity connection bolt hole, 18 shaft end connection hole, 19 Wheel hub connecting platform hole, 20 protective cover mounting hole, 21 rotating plate mounting platform, 22 rotating plate mounting groove, 23 transmission cam, 24 transmission cone, 25 secondary transmission gear, 26 bevel gear, 27 ball, 28 sealing cover, 29 motion slide, 30 sealing cover sealing screw hole, 31 sealing cover bracket, 32 return spring, 33 cavity sealing bolt hole, 34 fixed steel plate, 35 brake friction plate, 36 steel plate mounting boss, 37 brake friction plate mounting boss, 38 friction plate mounting slide. DETAILED DESCRIPTION

[0020] The specific contents of the present invention are further described below.

[0021] The present invention integrates a mechanical wet brake system for driving and parking brakes, such as Figure 1-7 As shown, it includes a brake-by-wire explosion-proof motor 1, a first-stage worm gear reduction mechanism, a second-stage bevel gear reduction mechanism, a frustum sliding mechanism, a braking mechanism and a wheel hub mounting seat.

[0022] One-stage worm gear reduction mechanism Figure 4-6As shown, it includes a brake worm 2, a transmission worm wheel, a turbine output rod and a worm wheel housing. The output shaft of the wire control explosion-proof motor 1 is connected to the end of the brake worm 2. The brake worm 2 and the transmission worm wheel are arranged in the worm wheel housing, and the turbine output rod is connected to the center of the transmission turbine. The secondary bevel gear reduction mechanism includes a transmission case housing, a bevel gear 26, a secondary transmission gear 25 and a transmission cone 24. The secondary transmission gear 25 is externally meshed with the bevel gear 26. The transmission cone 24 is arranged on the side of the secondary transmission gear 25 and is coaxial. The bevel gear 26 is connected to the transmission worm gear through a brake shaft. The secondary transmission gear 25 and the transmission cone 24 are located in the transmission case housing. The transmission case housing has an installation cavity opening on the side of the transmission cone 24. The frustum pushing mechanism includes a ball 27 and a cylindrical transmission cam 23 provided at the end surface of the transmission frustum 24. The ball 27 rolls with the cam surface of the transmission cam 23. The other end surface of the transmission cam 23 is provided with a return spring 32. The brake mechanism includes a brake cavity 7, a brake friction plate 35 and a fixed steel plate 34. The brake friction plate 35 and the fixed steel plate 34 are circular with a hole in the middle. Multiple plates are stacked at intervals. The brake cavity 7 is provided with a cylindrical cavity. The circumference of the brake friction plate 35 is matched with the inner wall of the cylindrical cavity in a concave-convex manner. A rotating plate mounting platform 21 is provided in the middle of the cylindrical cavity. The middle hole of the fixed steel plate 34 is matched with the rotating plate mounting platform 21 in a concave-convex manner. A sealing cover is installed on the side opening of the brake cavity 7. A brake hole is provided in the middle of the sealing cover. A transmission cam 23 is passed through the brake hole. A return spring 32 is located in the brake cavity 7 and is sleeved on the movable plate mounting platform 21, and its end contacts the fixed steel plate 34. The wheel hub mounting seat is provided on the other side of the brake cavity 7, and the side end surface of the sealing cover of the brake cavity 7 is sealed and connected to the transmission box housing through a flange.

[0023] A transmission connection boss 14 is provided on the peripheral surface of the transmission box housing, and the transmission connection boss 14 is installed on the transmission connection boss 14. worm gear housing Body 5 The middle of the transmission connection boss 14 and the end face of the worm gear housing 5 are provided with holes for installing the brake shaft, and the bevel gears and transmission worm gears are provided at both ends of the brake shaft.

[0024] like Figure 2 As shown, the worm gear housing 5 is divided into The worm gear cavity and the worm cavity, a flange is set at the contact surface of the worm gear cavity and the worm cavity and a shell fastening bolt hole 4 is opened. The shell fastening bolt hole 4 is provided with a worm gear shell fastening bolt hole 41 to fix the worm gear cavity and the worm cavity.

[0025] The transmission cam 23 is provided with a motion groove on the circumferential surface of the return spring side, and a sealing cover bracket is provided in the middle of the middle brake hole of the sealing cover. The sealing cover bracket is connected to the sealing cover through the groove limiter. The transmission cam 23 is embedded in the fan-shaped ring between the sealing cover bracket and the sealing cover, and the groove limiter is embedded in the motion groove.

[0026] A hub connecting platform 10 is provided on the outside of the brake cavity 7, and a hub connecting platform hole 19 is provided on the outer circumference of the hub connecting platform 10. A hub mounting seat 9 is provided on the other side of the hub connecting platform 10, and a protective cover mounting hole 20 is provided at one end of the hub mounting seat 9. The hub connecting platform 10 is provided with the integrated rotating plate mounting platform 21 in the brake cavity 7.

[0027] The present invention Figure 2 and Figure 3 As shown, the circumferential outer wall of the brake cavity 7 is provided with a brake device heat dissipation oil inlet 6.

[0028] Specifically, such as Figure 7 and Figure 8 In the figure, a brake friction pad mounting boss 37 is provided on the outer circumference of the brake friction pad 35, and a steel pad mounting boss 36 is provided on the inner circumference of the fixed steel pad 34. The brake friction pad 35 and the fixed steel pad 34 are alternately mounted on the rotating pad mounting platform 21, and a friction pad mounting groove 38 is provided on the inner wall of the cylindrical cavity of the brake cavity. The brake friction pad mounting boss 37 is installed in the friction pad mounting groove 38. The rotating pad mounting platform 21 is provided with a rotating pad mounting groove 22, and the steel pad mounting boss 36 is installed in the rotating pad mounting groove 22.

[0029] The circumferential surface of the transmission box housing of this device is provided with a shaft support platform 13, and the transmission connecting boss 14 is connected to the shaft support platform 13 by bolts. The transmission box housing is provided with a transmission shell connecting convex circle 11 around the opening of the installation cavity. The transmission shell connecting convex circle 11 is provided with a connecting hole and is connected to the sealing cover side of the brake cavity 7 through the transmission shell connecting convex circle connecting bolts 16.

[0030] Specifically, in this device, a sealing cover sealing screw hole 30 is provided in the circumferential direction of the sealing cover 28, and the sealing cover sealing screw hole 30 is connected to a cavity sealing bolt hole 33 provided on one end face of the brake cavity 7. The end face of the brake cavity 7 is provided with a cavity connecting boss 8, and the circumferential direction of the cavity connecting boss 8 is provided with a cavity connecting bolt hole 17. The other end face of the brake cavity 7 is fixedly connected to the shaft end connecting hole 18 provided at the circumference of the brake cavity cover, and the brake cavity cover opening is penetrated by a wheel hub connecting platform 10.

[0031] The braking method of the mechanical wet brake system integrating driving and parking brakes of the present invention is described, which includes two functions: braking and parking. When the vehicle is braking, the brake-by-wire explosion-proof motor of the device receives the braking signal and outputs the braking motor torque, which drags the transmission worm to rotate. The transmission worm rotates and engages with the transmission worm wheel to achieve the first speed reduction and torque increase, and has a reverse locking function. After the transmission worm wheel rotates, it drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The bevel gear rotates and engages with the secondary transmission gear to achieve the second speed reduction and torque increase. After the second-stage transmission gear rotates, it drives the transmission cone to rotate. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to achieve the function of converting rotation into linear motion. The transmission cam presses the brake friction plate and the fixed steel plate through the motion slide to achieve service braking; When the mining vehicle is parked, the explosion-proof motor of the wire control brake drives the transmission worm and the transmission worm wheel to rotate a certain angle. At the same time, the rotation of the transmission worm wheel drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The rotation of the bevel gear engages the secondary transmission gear. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to realize the function of converting rotation into linear motion. After the explosion-proof motor of the wire control brake is powered off, the mechanical self-locking function of the transmission worm and the transmission worm wheel can be used to realize parking brake.

Claims

1. A mechanical wet brake system integrating driving and parking brakes, Its characteristics are: It includes a brake-by-wire explosion-proof motor (1), a first-stage worm gear reduction mechanism, a second-stage bevel gear reduction mechanism, a cone push mechanism, a brake mechanism and a wheel hub mounting seat; The first-stage worm gear reduction mechanism comprises a brake worm (2), a transmission worm wheel, a turbine output rod and a worm wheel housing, the output shaft of the brake-by-wire explosion-proof motor (1) is connected to the end of the brake worm (2), the brake worm (2) and the transmission worm wheel are arranged in the worm wheel housing, and the turbine output rod is connected to the center of the transmission turbine; The secondary bevel gear reduction mechanism comprises a transmission case housing, a bevel gear (26), a secondary transmission gear (25) and a transmission cone (24), the secondary transmission gear (25) and the bevel gear (26) are externally meshed, the transmission cone (24) is arranged on the side of the secondary transmission gear (25) and is coaxial, the bevel gear (26) and the transmission worm gear are connected through a brake shaft, the secondary transmission gear (25) and the transmission cone (24) are in the transmission case housing, and the transmission case housing has an installation cavity opening on the side of the transmission cone (24); The cone pushing mechanism includes a ball (27) and a cylindrical transmission cam (23) arranged at the end surface of the transmission cone (24), wherein the ball (27) and the cam surface of the transmission cam (23) are rolled and transmitted, and a return spring (32) is provided on the other end surface of the transmission cam (23); The brake mechanism comprises a brake cavity (7), a brake friction plate (35) and a fixed steel plate (34), wherein the brake friction plate (35) and the fixed steel plate (34) are circular with a hole in the middle, and multiple plates are stacked at intervals. The brake cavity (7) is provided with a cylindrical cavity, and the circumference of the brake friction plate (35) is concave-convex matched with the inner wall of the cylindrical cavity. A rotating plate mounting platform (21) is provided in the middle of the cylindrical cavity, and the middle hole of the fixed steel plate (34) is provided with a concave-convex matched with the rotating plate mounting platform (21). A sealing cover is installed on the side opening of one side of the brake cavity (7), and a brake hole is provided in the middle of the sealing cover. A transmission cam (23) is passed through the brake hole. A return spring (32) is in the brake cavity (7) and is sleeved on the movable plate mounting platform (21) with its end abutting against the fixed steel plate (34). The wheel hub mounting seat is provided on the other side of the brake cavity (7), and the side end surface of the sealing cover of the brake cavity (7) is sealed and connected to the transmission case housing through a flange.

2. The mechanical wet brake system integrating driving and parking brakes according to claim 1, characterized in that: A transmission connection boss (14) is provided on the peripheral surface of the transmission box housing, and the transmission connection boss (14) is installed on the transmission connection boss (14). Worm gear housing (5) The middle of the transmission connection boss (14) and the end surface of the worm gear housing (5) are provided with holes for mounting the brake shaft, and the bevel gears and the transmission worm gear are provided at both ends of the brake shaft.

3. The mechanical wet brake system integrating service and parking brakes according to claim 2, characterized in that: worm gear housing Body (5) is divided into A worm gear cavity and a worm gear cavity are provided, and a flange is provided at the contact surface of the worm gear cavity and the worm gear cavity and a housing fastening bolt hole (4) is provided. The housing fastening bolt hole (4) is provided with a worm gear housing fastening bolt hole (41) to fixedly connect the worm gear cavity and the worm gear cavity.

4. The mechanical wet brake system integrating service and parking brakes according to claim 1, characterized in that: The transmission cam (23) is provided with a motion slide groove on the peripheral surface of the return spring side, a sealing cover bracket is provided in the middle of the middle brake hole of the sealing cover, and the sealing cover bracket is connected to the sealing cover through the slide groove limiter, the transmission cam (23) is embedded in the fan-shaped ring between the sealing cover bracket and the sealing cover, and the slide groove limiter is embedded in the motion slide groove.

5. The mechanical wet brake system integrating service and parking brakes according to claim 1, characterized in that: A hub connecting platform (10) is provided on the outside of the brake cavity (7), a hub connecting platform hole (19) is provided on the outer circumference of the hub connecting platform (10), a hub mounting seat (9) is provided on the other side of the hub connecting platform (10), a protective cover mounting hole (20) is provided at one end of the hub mounting seat (9), and the hub connecting platform (10) is provided with the integrated rotating plate mounting platform (21) in the brake cavity (7).

6. The mechanical wet brake system integrating service and parking brakes according to claim 1, characterized in that: A brake device heat dissipation oil inlet (6) is provided on the circumferential outer wall of the brake cavity (7).

7. The mechanical wet brake system integrating service and parking brakes according to claim 1, characterized in that: The outer circumference of the brake friction plate (35) is provided with a brake friction plate mounting boss (37), the inner circumference of the fixed steel plate (34) is provided with a steel plate mounting boss (36), the brake friction plate (35) and the fixed steel plate (34) are alternately mounted on the rotating plate mounting platform (21), the inner wall of the cylindrical cavity of the brake cavity is provided with a friction plate mounting groove (38), the brake friction plate mounting boss (37) is mounted in the friction plate mounting groove (38), the rotating plate mounting platform (21) is provided with a rotating plate mounting groove (22), and the steel plate mounting boss (36) is mounted in the rotating plate mounting groove (22).

8. The mechanical wet brake system integrating service and parking brakes according to claim 2, characterized in that: A shaft support platform (13) is provided on the circumferential surface of the transmission case housing, the transmission connection boss (14) is connected to the shaft support platform (13) by bolts, and a transmission case connection convex circle (11) is provided around the opening of the installation cavity of the transmission case housing, and the transmission case connection convex circle (11) is provided with a connection hole connected to the sealing cover side of the brake cavity (7) through the transmission case connection convex circle connection bolts (16).

9. The mechanical wet brake system integrating service and parking brakes according to claim 2, characterized in that: The sealing cover (28) is provided with a sealing cover sealing screw hole (30) in the circumferential direction, and the sealing cover sealing screw hole (30) is connected to a cavity sealing bolt hole (33) provided on one end face of the brake cavity (7). The end face of the brake cavity (7) is provided with a cavity connecting boss (8), and the cavity connecting boss (8) is provided with a cavity connecting bolt hole (17) in the circumferential direction. The other end face of the brake cavity (7) is fixedly connected to the shaft end connecting hole (18) provided at the circumference of the brake cavity cover, and the brake cavity cover is fixed on the wheel hub connecting platform (10).

10. A braking method for a mechanical wet brake system integrating service and parking brakes according to claim 1, characterized in that: When the vehicle is braking, the brake-by-wire explosion-proof motor of the device outputs the braking motor torque after receiving the braking signal, dragging the transmission worm to rotate. The transmission worm rotates and engages with the transmission worm wheel to achieve the first speed reduction and torque increase, and has a reverse locking function. After the transmission worm wheel rotates, it drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The bevel gear rotates and engages with the secondary transmission gear to achieve the second speed reduction and torque increase. After the second-stage transmission gear rotates, it drives the transmission cone to rotate. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to achieve the function of converting rotation into linear motion. The transmission cam presses the brake friction plate and the fixed steel plate through the motion slide to achieve service braking; When a mining vehicle is parked, the explosion-proof motor of the brake-by-wire system drives the transmission worm and the transmission worm wheel to rotate at a certain angle. At the same time, the rotation of the transmission worm wheel drives the transmission shaft to rotate, and then drives the bevel gear to rotate. The rotation of the bevel gear engages the secondary transmission gear. The rotation of the transmission cone drives the ball to move on the outer edge of the transmission cam to realize the function of converting rotation into linear motion. After the explosion-proof motor of the brake-by-wire system is powered off, the mechanical self-locking function of the transmission worm and the transmission worm wheel can be used to realize parking braking.

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