An integrated electric braking system and an electric braking method

Abstract

The present invention discloses an integrated electric braking system and an electric braking method, which relate to the field of braking systems and include a brake rod body, a push rod, a parking spring, a cover plate, a nut, a motor assembly and a controller; the cover plate is arranged at the tail of the brake rod body; the push rod is movably arranged in the inner cavity of the brake rod body, the push rod is provided with a push rod head and a push rod tail, the push rod head penetrates through the head of the brake rod body, the push rod tail passes through the cover plate and penetrates through the tail of the brake rod body, and a lead screw structure is arranged at the push rod tail; the parking spring is compressed between the push rod and the cover plate; the rotor of the motor assembly includes a rotor output end, the nut is fixedly connected to the rotor output end, and the inside of the nut is matched with the lead screw structure at the push rod tail; the motor assembly is connected to the controller. The advantages of the present invention are as follows: the driving braking function and the parking braking function are integrated inside a single brake rod body, which better meets the requirements of functional safety and eliminates the need for a hydraulic oil circuit.

Description

Technical Field

[0001] The present invention relates to the field of brake systems, and in particular to an integrated electric brake system and an electric brake method. Background Art

[0002] For the braking system of forklifts, internal combustion forklifts or electric single-motor drive axle forklifts basically use brake drums; the biggest disadvantage of drum brakes is poor heat dissipation. Since the braking system is enclosed in the brake drum, the heat generated by friction cannot be quickly dissipated after continuous braking. After the brake drum expands due to heat, the contact surface with the brake pad will become smaller, thus affecting the braking efficiency.

[0003] For electric forklifts, especially forklifts with dual motor drive axles, the current braking system basically adopts wet friction plate braking to achieve the two braking functions of service braking and parking braking. For example, the patent document with announcement number CN218510053U discloses a modular brake lever structure. There are currently many ways to implement the braking function of the wet friction plate brake.

[0004] Method 1: If Figure 1 As shown, in the existing method, in the forklift brake lever, the friction plate is installed inside the reduction box of the drive axle, and a brake lever 1 is installed on one side of the reduction box. The brake lever 1 is designed in the form of a lever and is connected to the oil pipe 2 and the cable 3. When the foot steps on the brake pedal, the brake oil with a certain pressure is transported into the inner cavity 4 of the brake lever 1, and the piston 6 in the brake lever 1 pushes the top pin 7 to support the drive axle reduction box housing 8. Under the action of the lever, the brake lever 1 pushes the brake pin 5, and then pushes the pressure plate to combine the friction plate with the dual steel plate to achieve driving braking. When parking is required, the driver pulls up the handbrake, which drives the cable 3 to lift the brake lever 1 as in driving braking, and then pushes the brake pin 5 to press the friction plate to achieve parking braking. For a wet friction plate brake of this structure, the parking brake function must be realized when the driver actively pulls up the handbrake. Once the driver forgets to pull up the handbrake, there will be a great safety risk.

[0005] Method 2: If Figure 2As shown in the figure, in the existing forklift brake lever of the second method, on the one hand, an oil circuit is designed on the reduction gearbox housing 17 of the drive axle to provide a certain amount of hydraulic oil for service braking. On the other hand, a brake lever 9 is installed to achieve parking braking. A spring 10 is installed inside the brake lever 9, and a brake piston 11 is installed on the reduction gearbox housing 17 of the drive axle. At the same time, a oil pipe 12 and a oil pipe 13 are respectively connected to the brake lever 9 and the reduction gearbox housing 17 of the drive axle. When parking, the spring force provided by the spring 10 is used to lift the brake lever 9, and then the brake piston 11 is pushed to press the friction plate to achieve parking braking. After the vehicle starts, the hydraulic oil is transported into the cavity 14 of the brake lever 9, pushing the piston rod 15 to compress the spring 10. At this time, the brake lever 9 drops, and the parking brake is released. When the brake pedal is stepped on, the brake oil is directly transported into the oil cavity 16 on the reduction gearbox housing 17 of the drive axle, pushing the brake piston 11 to press the friction plate to achieve service braking. For the wet friction plate brake with this structure, although it avoids the safety risk when the driver forgets to pull up the handbrake, since the brake lever only provides the parking braking function, a set of oil circuit needs to be designed on the driving device to achieve the service braking function. During service braking, due to the loss of the lever action, for the whole vehicle, either the hydraulic oil pressure needs to be increased or the friction area needs to be increased, both of which will lead to an increase in cost.

[0006] Both of the above two braking methods need to adopt a hydraulic oil circuit, involving oil pipes, brake oil, the oil circuit inside the brake lever, etc. An oil pump is required to increase the oil pressure, and the structure is complex. At the same time, corresponding seals are needed for sealing. As the operation time increases, the seals are prone to wear, resulting in the risk of oil leakage or even inability to brake, causing a large safety hazard. In addition, the brake oil needs to be maintained and replaced regularly, wasting time and unable to achieve maintenance-free. At the same time, a hydraulic system is required, which has a large noise and low efficiency. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to integrate the service braking function and the parking braking function inside a single brake lever body, which better meets the requirements of functional safety and does not require a hydraulic oil circuit.

[0008] The present invention solves the above technical problems through the following technical means: An integrated electric braking system includes a brake rod body, a push rod, a parking spring, a cover plate, a nut, a motor assembly, and a controller; the cover plate is arranged at the tail of the brake rod body; the push rod is movably arranged in the inner cavity of the brake rod body, the push rod is provided with a push rod head and a push rod tail, the push rod head penetrates through the head of the brake rod body, the push rod tail passes through the cover plate and penetrates through the tail of the brake rod body, and a screw rod structure is arranged on the push rod tail; the parking spring is compressed between the push rod and the cover plate; the rotor of the motor assembly includes a rotor output end, the nut is fixedly connected to the rotor output end, and the inside of the nut is matched with the screw rod structure of the push rod tail; the motor assembly is connected to the controller.

[0009] The present invention integrates the driving braking function and the parking braking function inside a single brake rod body, provides the parking braking force through spring pressure, eliminating the design of the traditional parking brake handbrake system. It can achieve parking braking without any external force intervention, avoiding parking brake failure caused by driver forgetting or cable breakage, etc. The structure is simple and the effect is reliable, more meeting the requirements of functional safety; it uses a motor assembly to drive the push rod, replacing the traditional hydraulic drive method, reducing the hydraulic circuit, oil pipes, brake fluid, and a large number of seals, simplifying the structure, reducing the risk of brake failure caused by seal failure, simplifying the number of parts and the assembly difficulty, and at the same time, it can be maintenance-free without oil change; moreover, the efficiency of the motor and the ball screw structure is high, improving the efficiency of the whole machine and effectively reducing the vehicle noise; it uses an electric control method to control the braking system, which is easy for the integrated control of the whole vehicle and has a fast response speed, providing a hardware basis for autonomous driving or high-level assisted driving forklifts; it can provide spring force braking or a combined force braking of spring force and motor driving force for driving braking based on the requirements of the whole vehicle, improving the comfort during braking.

[0010] Preferably, the integrated electric braking system further includes a limit block, the limit block is arranged in the inner cavity of the brake rod body, and the push rod head penetrates through the limit block; a push rod mating surface is arranged in the inner cavity of the brake rod body, a convex structure is arranged on the push rod between the limit block and the push rod mating surface, one side of the convex structure facing the limit block is a push rod limiting surface, and one side of the convex structure facing the push rod mating surface is a push rod contact surface; the parking spring is sleeved outside the push rod and is compressed between the convex structure of the push rod and the cover plate, one end of the parking spring contacts the push rod contact surface, and the other end of the parking spring contacts the inner end surface of the cover plate.

[0011] Preferably, the integrated electric braking system further includes a snap ring. A snap ring groove is provided in the inner cavity of the brake rod body. The snap ring is assembled in the snap ring groove, and the limiting block is axially fixed by the snap ring.

[0012] Preferably, a mating surface of the ejector rod is provided on the ejector rod, and the mating surface of the ejector rod contacts and positions with the inner hole of the limiting block.

[0013] Preferably, a mating surface for the cover plate is provided in the inner cavity of the brake rod body. A raised cover plate stop is provided on the cover plate, and the cover plate stop contacts and positions with the mating surface for the cover plate.

[0014] Preferably, the rotor of the motor assembly further includes an avoidance hole. The avoidance hole is provided at the middle position of the output end of the rotor, and the ejector rod can enter the avoidance hole.

[0015] Preferably, the controller is installed on the motor assembly. The controller is integrated on the motor assembly, reducing the wiring harness connection, with high integration and simple assembly.

[0016] Preferably, the integrated electric braking system further includes a fixing pin. An installation hole is provided on the brake rod body, and the brake rod body can be rotatably connected to the driving axle reduction gearbox housing through the fixing pin passing through the installation hole.

[0017] Preferably, a brake pin groove is further provided on the brake rod body, and the brake rod body can contact and cooperate with the brake pin on the driving axle reduction gearbox housing through the brake pin groove.

[0018] An electric braking method using the integrated electric braking system includes the following steps:

[0019] When the vehicle is parked, the motor assembly does not work, the nut can rotate freely, the parking spring pushes the ejector rod so that the head of the ejector rod contacts the driving axle reduction gearbox housing, and the brake rod body pushes the brake pin to move towards the wet braking component side to achieve parking braking;

[0020] When the vehicle starts, the controller drives the rotor of the motor assembly to rotate forward, driving the nut to rotate forward. The ejector rod drives the parking spring to be further compressed, causing the brake rod body to lower. The brake pin is reset under the action of the return spring of the wet braking component, and the parking braking is released. After the vehicle travels normally, the controller controls the rotor of the driving motor assembly to lock;

[0021] When the vehicle brakes during driving, according to the braking force required by the whole vehicle, the controller drives the rotor of the motor assembly to rotate reversely, causing the nut to rotate reversely. Under the combined action of the spring force and the motor, it pushes the head of the ejector rod to contact the driving axle reduction gearbox housing, and the brake rod body pushes the brake pin to move towards the wet braking component side to achieve driving braking;

[0022] When the service brake needs to be released, perform the actions during vehicle startup;

[0023] When a vehicle moving operation is required, remove the motor assembly and the cover plate. At this time, the parking spring is unloaded, the braking force on the brake pin is released, and the wet braking components are released, allowing the vehicle to be moved.

[0024] The present invention can provide spring force braking or combined force braking of spring force and motor driving force for service braking based on the requirements of the whole vehicle, improving the comfort in the braking state.

[0025] The detachable design of the motor assembly can meet the vehicle moving requirement in case of braking system failure. Even if the motor or the controller fails, the vehicle can still be moved through manual release, improving the maintenance convenience.

[0026] The advantages of the present invention are as follows:

[0027] 1. The present invention integrates the service braking function and the parking braking function inside a single brake rod body, providing parking braking force through spring pressure, eliminating the design of the traditional parking brake handbrake system. Parking braking can be achieved without any external force intervention, avoiding parking brake failure caused by driver forgetting or cable breakage, etc. The structure is simple, the effect is reliable, and it better meets the requirements of functional safety; the motor assembly drives the push rod, replacing the traditional hydraulic transmission method, reducing the hydraulic circuit, oil pipes, brake fluid, and a large number of seals, simplifying the structure, reducing the risk of braking failure caused by seal failure, simplifying the number of parts and the assembly difficulty, and at the same time, it can be maintenance-free without oil change; moreover, the motor and ball screw structure has high efficiency, improving the overall efficiency of the machine and effectively reducing the noise of the whole vehicle; the braking system is controlled electronically, which is easy for the integrated control of the whole vehicle, has a fast response speed, and provides a hardware basis for autonomous driving or high-level assisted driving forklifts; it can provide spring force braking or combined force braking of spring force and motor driving force for service braking based on the requirements of the whole vehicle, improving the comfort in the braking state.

[0028] 2. The controller is integrated on the motor assembly, reducing the wire harness connection, with high integration and easy assembly.

[0029] 3. The detachable design of the motor assembly can meet the vehicle moving requirement in case of braking system failure. Even if the motor or the controller fails, the vehicle can still be moved through manual release, improving the maintenance convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the cooperation between an existing forklift braking system of Method 1 and wet braking components.

[0031] Figure 2Schematic diagram of the structure of the existing forklift braking system in combination with the wet braking components.

[0032] Figure 3 Isometric schematic diagram of the integrated electric braking system according to the embodiment of the present invention.

[0033] Figure 4 Cross-sectional schematic diagram of the integrated electric braking system according to the embodiment of the present invention.

[0034] Figure 5 Cross-sectional schematic diagram of the brake rod body according to the embodiment of the present invention.

[0035] Figure 6 Top view schematic diagram of the brake rod body according to the embodiment of the present invention.

[0036] Figure 7 Isometric schematic diagram of the push rod according to the embodiment of the present invention.

[0037] Figure 8 Front view schematic diagram of the push rod according to the embodiment of the present invention.

[0038] Figure 9 Isometric schematic diagram of the cover plate according to the embodiment of the present invention.

[0039] Figure 10 Isometric schematic diagram of the nut according to the embodiment of the present invention.

[0040] Figure 11 Isometric schematic diagram of the motor assembly according to the embodiment of the present invention.

[0041] Figure 12 Schematic diagram of the brake release state of the integrated electric braking system according to the embodiment of the present invention.

[0042] Figure 13 Schematic diagram of the parking brake state of the integrated electric braking system according to the embodiment of the present invention.

[0043] Figure 14 Schematic diagram of the driving brake state of the integrated electric braking system according to the embodiment of the present invention. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0045] Such as Figures 3 to 11As shown in the figure, an embodiment of the present invention discloses an integrated electric braking system, which includes a brake rod body 18, a push rod 19, a parking spring 20, a limit block 21, a snap ring 22, a cover plate 23, a nut 24, a motor assembly 25, a controller 26 and a fixing pin 27.

[0046] The brake rod body 18 is provided with a mounting hole 181 and a brake pin groove 182. The brake rod body 18 can be rotatably connected to the drive axle reduction gearbox housing 29 through the fixing pin 27 passing through the mounting hole 181 and is in contact and cooperation with the brake pin 28 on the drive axle reduction gearbox housing 29 through the brake pin groove 182. The brake rod body 18 can apply force to the wet braking component 30 in the drive axle reduction gearbox housing 29 through the brake pin 28, compress the friction plates, make the friction plates fit together to generate a huge frictional force, and finally convert it into a braking torque.

[0047] The inner cavity of the brake rod body 18 is successively provided with a snap ring groove 183, a push rod mating surface 184 and a cover plate mating surface 185 from the head to the tail; the snap ring 22 is assembled in the snap ring groove 183, the limit block 21 is arranged in the inner cavity of the brake rod body 18 and is axially fixed by the snap ring 22; the cover plate 23 is arranged at the tail of the brake rod body 18, and a raised cover plate stop 231 is provided on the cover plate 23, and the cover plate stop 231 is in contact and positioning with the cover plate mating surface 185.

[0048] The push rod 19 is movably arranged in the inner cavity of the brake rod body 18. The push rod 19 is provided with a push rod head 191, a push rod tail 192, a push rod mating surface 193, a push rod limit surface 194 and a push rod contact surface 195; the push rod head 191 passes through the limit block 21 and passes out of the head of the brake rod body 18, the push rod tail 192 passes through the cover plate 23 and passes out of the tail of the brake rod body 18, and the push rod tail 192 is provided with a screw rod structure; the push rod mating surface 193 is in contact and positioning with the inner hole of the limit block 21; a raised structure is provided on the push rod 19 between the limit block 21 and the push rod mating surface 184. The side of the raised structure facing the limit block 21 is the push rod limit surface 194, and the side of the raised structure facing the push rod mating surface 184 is the push rod contact surface 195.

[0049] The parking spring 20 is sleeved outside the push rod 19 and is compressed between the raised structure of the push rod 19 and the cover plate 23. One end of the parking spring 20 is in contact with the push rod contact surface 195, and the other end of the parking spring 20 is in contact with the inner end surface of the cover plate 23.

[0050] The motor assembly 25 is arranged at the tail of the brake lever body 18. The motor assembly 25 and the cover plate 23 are jointly and fixedly connected to the brake lever body 18 by bolts. The rotor of the motor assembly 25 includes a rotor output end 251 and an avoidance hole 252. The nut 24 is a ball nut, and the nut 24 is fixedly connected to the rotor output end 251 by bolts. The inside of the nut 24 is matched with the screw rod structure of the tail 192 of the ejector rod. The avoidance hole 252 is arranged at the middle position of the rotor output end 251. The ejector rod 19 can enter the avoidance hole 252, and the avoidance hole 252 is used to avoid the movement of the ejector rod 19 during brake release.

[0051] The controller 26 is installed on the motor assembly 25 or can also be installed on the whole vehicle. The motor assembly 25 is connected to the controller 26. The controller 26 is used to control the rotation direction of the rotor of the motor assembly 25, control the output torque of the rotor of the motor assembly 25 and provide a resistance torque, so as to drive the nut 24 to rotate. The nut 24 converts the rotational motion of the rotor into the linear motion of the ejector rod 19, so as to realize the axial movement of the ejector rod 19 along the brake lever body 18.

[0052] The present invention also discloses an electric braking method, which adopts the integrated electric braking system and includes the following steps:

[0053] As Figure 13 shown, when the vehicle is parked, the whole vehicle is powered off, or the controller 26 receives the "parking" signal of the whole vehicle in the powered-on state. At this time, the motor assembly 25 does not work, and the nut 24 can rotate freely. The motor rotor and the nut 24 only have frictional resistance to the ejector rod 19 and do not provide axial thrust and axial tension. Under the action of its own spring force, the parking spring 20 pushes the ejector rod 19 so that the head 191 of the ejector rod contacts the housing 29 of the drive axle reduction gearbox. The brake lever body 18 pushes the brake pin 28 to move towards the wet braking component 30 side through a lever action. At this time, the friction plates of the wet braking component 30 are in contact, generating a braking torque to realize parking braking. At this time, the spring force and the force on the brake pin 28 required for parking braking are balanced on the brake lever body 18. It should be noted that there is still a gap between the ejector rod 19 and the limit block 21 at this time.

[0054] As Figure 12As shown in the figure, when the vehicle starts, the entire vehicle is powered on. The controller 26 receives the "brake release" signal of the entire vehicle and executes the "release brake" action. The controller 26 drives the rotor of the motor assembly 25 to rotate forward, driving the nut 24 to rotate forward. Through the screw structure at the tail 192 of the ejector rod, the forward rotation of the rotor is converted into a linear motion of the ejector rod 19 in the direction of the avoidance hole 252. At this time, the ejector rod 19 drives the parking spring 20 to be further compressed, causing the ejector rod contact surface 195 to contact or approach the ejector rod mating surface 184. At this time, the brake rod body 18 is lowered, and the brake pin 28 is reset under the action of the return spring of the wet braking component 30. The friction plates of the wet braking component 30 are separated, and the parking brake is released, and the vehicle can drive. After the vehicle is driving normally, the controller 26 controls the rotor of the drive motor assembly 25 to lock.

[0055] As Figure 14 shown in the figure, when the vehicle brakes during driving, the controller 26 receives the "service brake" signal of the entire vehicle and executes the "service brake" action. According to the braking force required by the entire vehicle, the controller 26 drives the rotor of the motor assembly 25 to rotate in the reverse direction, causing the nut 24 to rotate in the reverse direction. Through the screw structure at the tail 192 of the ejector rod, the reverse rotation of the rotor is converted into a linear motion of the ejector rod 19 in the direction away from the avoidance hole 252. Under the combined action of the spring force and the motor force, the ejector rod head 191 is pushed to contact the drive axle reduction gearbox housing 29. The brake rod body 18 pushes the brake pin 28 to move toward the wet braking component 30 through a lever action. At this time, the friction plates of the wet braking component 30 are fitted together to generate a braking torque, realizing the service brake. It should be noted that according to the magnitude of the required braking force, when performing the service brake, the ejector rod 19 is in contact with the limit block 21 (considering the maximum braking force under extreme wear, generally this working condition does not exist, and there should be a gap under normal conditions) or there is a gap.

[0056] Specifically, when the entire vehicle requires a large braking torque, the thrust generated by the motor assembly 25 driving the nut 24 and the thrust of the parking spring 20 jointly push the ejector rod 19; when the braking torque required by the entire vehicle is equal to or less than the maximum braking torque of the parking brake, the motor assembly 25 provides a small thrust or no thrust or even a small reverse pull, and only relies on the spring force of the parking spring 20 to provide the braking force.

[0057] When the service brake needs to be released, the controller 26 receives the "brake release" signal of the entire vehicle and executes the "release brake" action when the vehicle starts.

[0058] When the entire vehicle fails or the braking system fails and a vehicle moving operation is required, first slowly remove the motor assembly 25, and then remove the cover plate 23. At this time, the parking spring 20 is unloaded, the braking force on the brake pin 28 is released, the wet braking component 30 is released, and the friction plates are separated, and then the vehicle can be moved, and the operation is simple.

[0059] In the present invention, since the controller 26 is used to control the motor assembly 25, the braking function is perfect, and the power-off parking braking function can be achieved. Under the powered-on state, according to the braking requirements of the whole vehicle, the braking function with only spring force and the combined force of spring force and motor (spring force + lead screw thrust or spring force - lead screw thrust) can be realized, and the braking force can be linearly adjusted. At the same time, the motor and ball screw structure have high efficiency, which indirectly improves the endurance of the whole vehicle. In addition, this solution is a wire-controlled brake, providing a hardware basis for autonomous driving and high-level assisted driving. The present invention adopts electronic control, with a fast response speed, and can adjust the braking force and deceleration based on the vehicle speed, improving the braking comfort of the whole vehicle.

[0060] In the present invention, since there is no hydraulic system, the noise is low, the efficiency is high, more seals, oil pipes, etc. are saved, there is no need to change the oil, and there is no risk of leakage, so true maintenance-free can be achieved.

[0061] The present invention is modularly designed. The controller can be integrated on the motor or arranged separately. At the same time, the detachable design is convenient for vehicle moving and maintenance, etc.

[0062] The present invention adopts an electronic control method to control the braking system, which is easy for the integrated control of the whole vehicle, has a fast response speed, and provides a hardware basis for autonomous driving or high-level assisted driving forklifts.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated electric braking system, characterized in that: It includes a brake lever body, a push rod, a parking spring, a cover plate, a nut, a motor assembly and a controller; the motor assembly and the cover plate are fixedly connected to the tail of the brake lever body through bolts; the push rod is movably arranged in the inner cavity of the brake lever body, the push rod is provided with a push rod head and a push rod tail, the push rod head penetrates through the head of the brake lever body, the push rod tail passes through the cover plate and penetrates through the tail of the brake lever body, and a screw rod structure is arranged on the push rod tail; the parking spring is compressed between the push rod and the cover plate; the rotor of the motor assembly includes a rotor output end, the nut is fixedly connected to the rotor output end, and the inside of the nut is matched with the screw rod structure of the push rod tail; the rotor of the motor assembly further includes an avoidance hole, the avoidance hole is arranged at the middle position of the rotor output end, and the push rod can enter the avoidance hole; the motor assembly is connected to the controller; The braking method includes the following steps: When the vehicle parks, the motor assembly does not work, the nut can rotate freely, the parking spring pushes the push rod to make the push rod head contact with the driving axle reduction gearbox housing, and the brake lever body pushes the brake pin to move towards the wet braking component side to realize parking braking; When the vehicle starts, the controller drives the rotor of the motor assembly to rotate forward, drives the nut to rotate forward, the push rod drives the parking spring to be further compressed, makes the brake lever body lower, the brake pin resets under the action of the return spring of the wet braking component, the parking braking is released, and after the vehicle runs normally, the controller controls the rotor of the driving motor assembly to lock; When braking during vehicle driving, according to the braking force required by the whole vehicle, the controller drives the rotor of the motor assembly to rotate reversely, makes the nut rotate reversely, and under the combined action of the spring force and the motor, pushes the push rod head to contact with the driving axle reduction gearbox housing, and the brake lever body pushes the brake pin to move towards the wet braking component side to realize driving braking; When the driving braking needs to be released, perform the actions when the vehicle starts; When a vehicle moving operation is required, remove the motor assembly and the cover plate. At this time, the parking spring unloads the force, the braking force on the brake pin is released, and the wet braking component is released, and then the vehicle can be moved.

2. The integrated electric braking system according to claim 1, wherein: The integrated electric braking system further includes a limit block, the limit block is arranged in the inner cavity of the brake lever body, and the push rod head penetrates through the limit block; the inner cavity of the brake lever body is provided with a push rod mating surface, and a convex structure is arranged on the push rod between the limit block and the push rod mating surface. The side of the convex structure facing the limit block is the push rod limit surface, and the side of the convex structure facing the push rod mating surface is the push rod contact surface; the parking spring is sleeved outside the push rod and is compressed between the convex structure of the push rod and the cover plate, one end of the parking spring contacts the push rod contact surface, and the other end of the parking spring contacts the inner end surface of the cover plate.

3. The integrated electric braking system according to claim 2, characterized in that: The integrated electric braking system further includes a snap ring, the inner cavity of the brake lever body is provided with a snap ring groove, the snap ring is assembled in the snap ring groove, and the limit block is axially fixed by the snap ring.

4. The integrated electric braking system according to claim 2, characterized in that: The push rod is provided with a push rod mating surface, and the push rod mating surface contacts and positions with the inner hole of the limit block.

5. The integrated electric braking system according to claim 1, wherein: The inner cavity of the brake lever body is provided with a cover plate mating surface, and a raised cover plate stop is provided on the cover plate. The cover plate stop contacts and positions with the cover plate mating surface.

6. The integrated electric braking system according to claim 1, characterized in that: The controller is installed on the motor assembly.

7. The integrated electric braking system according to claim 1, wherein: The integrated electric braking system further includes a fixing pin. An installation hole is provided on the brake lever body, and the brake lever body can be rotatably connected to the driving axle reduction gearbox housing through the fixing pin passing through the installation hole.

8. The integrated electric braking system according to claim 1, wherein: A brake pin groove is further provided on the brake lever body, and the brake lever body can be in contact and cooperation with the brake pin on the driving axle reduction gearbox housing through the brake pin groove.

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