Electric transfer vehicle

Abstract

The present disclosure provides an electric transporter. The electric transporter includes a vehicle frame, wheels, a drive mechanism, and a braking mechanism. The drive mechanism includes a drive motor, a reduction gearbox, and a transmission shaft; the input end of the reduction gearbox is connected to the drive motor through the transmission shaft, and the output end of the reduction gearbox is connected to the wheels to drive the wheels to rotate; the braking mechanism includes a master cylinder assembly, a brake caliper, and a brake disc, the brake disc is installed around the transmission shaft, and the brake caliper is arranged corresponding to the brake disc; the master cylinder assembly is used to drive the brake caliper so that the brake caliper brakes the brake disc, thereby braking the rotation of the wheels. The technical solution of the present disclosure is beneficial to reducing the volume and weight of the braking mechanism, thereby facilitating installation in the assembly of the vehicle.

Description

Technical Field

[0001] The present disclosure relates to the field of electric transfer vehicles, and particularly to an electric transfer vehicle. Background Art

[0002] The commonly used braking methods in port transportation machinery such as transfer vehicles are hydraulic and pneumatic braking. In related technologies, the braking method for transfer vehicles is generally as follows: a brake disc is attached to the wheels of the transfer vehicle, and the brake is driven by hydraulic or pneumatic power to contact the brake disc to achieve braking. In this way, the brake needs to have a large braking torque. Correspondingly, the braking device requires a large installation space and increases the weight of the whole vehicle, which is not conducive to the assembly of the vehicle and the conservation of energy. Summary of the Invention

[0003] An object of the present disclosure is to reduce the weight of the braking mechanism in an electric transfer vehicle.

[0004] To solve the above technical problems, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, the present disclosure provides an unmanned electric transfer vehicle, including a frame, wheels, a driving mechanism, and a braking mechanism. The wheels are rotatably installed below the frame; the driving mechanism includes a driving motor, a speed reducer, and a transmission shaft; the driving motor is fixedly connected to the frame; the input end of the speed reducer is connected to the driving motor through the transmission shaft, and the output end of the speed reducer is connected to the wheels to drive the wheels to rotate; the braking mechanism includes a master cylinder assembly, a brake caliper, and a brake disc. The brake disc is circumferentially installed on the transmission shaft, the brake caliper is installed on the frame and is arranged corresponding to the brake disc; the master cylinder assembly is used to drive the brake caliper so that the brake caliper brakes the brake disc, thereby braking the rotation of the wheels.

[0006] In one embodiment, the master cylinder assembly includes a control circuit, a DC motor, a two-stage reduction assembly, and a brake master cylinder; the control circuit is used to drive the DC motor to operate, and the DC motor drives the push rod of the brake master cylinder to move through the two-stage reduction assembly to establish oil pressure.

[0007] In one embodiment, a stepped portion is provided on the transmission shaft, and the brake disc is installed on the stepped portion.

[0008] In one embodiment, there are two master cylinder assemblies, including a front master cylinder assembly installed on the front side of the vehicle frame and a rear master cylinder assembly installed on the rear side of the vehicle frame; there are multiple wheels in the front-rear direction, namely front wheels and rear wheels; there are multiple brake calipers, including a front brake caliper corresponding to the front wheels and a rear brake caliper corresponding to the rear wheels; the brake wheel cylinder of the front brake caliper is connected to the brake master cylinder of the front master cylinder assembly, and the brake wheel cylinder of the rear brake caliper is connected to the brake master cylinder of the rear master cylinder assembly.

[0009] In one embodiment, the electric transporter further includes a brake master control circuit and a CAN control network; both the brake master control circuit and the control circuit are connected to the CAN control network;

[0010] The brake master control circuit sends a brake signal to the control circuit through the CAN control network, and the control circuit drives the DC motor to operate according to the brake signal.

[0011] In one embodiment, the electric transporter further includes an emergency stop button and an emergency stop circuit connected to the emergency stop button;

[0012] The emergency stop circuit is used to send a brake signal to the brake master control circuit when the emergency stop button is pressed, and the brake master control circuit controls the master cylinder assembly to act to generate a braking torque.

[0013] In one embodiment, the electric transporter further includes a timing circuit; the timing circuit is connected to the brake master control circuit;

[0014] The timing circuit is used to record the duration after the emergency stop button is pressed, and the brake master control circuit is used to control the master cylinder assembly to stop acting to release the braking torque when the duration after the emergency stop button is pressed reaches a first preset duration.

[0015] In one embodiment, the electric transporter further includes an electronic parking drive assembly, and the electronic parking drive assembly is drivingly connected to the brake caliper corresponding to the rear wheels;

[0016] The electronic parking drive assembly is connected to the brake master control circuit to drive the brake caliper to act for parking when the brake master control circuit sends a parking instruction.

[0017] In one embodiment, the electric transporter has a power supply unit;

[0018] When the voltage output by the power supply unit reaches a first high voltage, the brake master control circuit controls the electronic parking drive assembly to drive the brake caliper to act to release the parking;

[0019] When the voltage output by the power supply unit reaches the first low voltage, the brake master control circuit controls the electronic parking drive assembly to drive the brake caliper to act for parking.

[0020] In one embodiment, the unmanned electric transporter further includes one or more of a pressure detection device, a current detection device, and a displacement detection device; wherein, the pressure detection device is disposed in the brake master cylinder and is configured to detect the pressure in the brake master cylinder; the control circuit is connected to the pressure detection device to output a first fault signal to the brake master control circuit when the pressure in the master cylinder is abnormal; the current detection device is connected to the bus of the DC motor and is configured to detect the bus current on the DC motor; the control circuit is connected to the current detection device to output a second fault signal to the brake master control circuit when the bus current on the DC motor is abnormal; the displacement detection device is connected to the piston of the brake master cylinder and is configured to detect the displacement of the piston of the brake master cylinder; the control circuit is connected to the displacement detection device to output a third fault signal to the brake master control circuit when the displacement of the piston of the brake master cylinder is abnormal.

[0021] In one embodiment, the unmanned electric transporter further includes a brake caliper bracket, the vehicle frame includes a motor mounting plate, the drive motor is mounted on one side surface of the motor mounting plate, and the brake caliper bracket is mounted on the other side surface, and the brake caliper is mounted on the brake caliper bracket.

[0022] The brake disc of the technical solution of the present disclosure is disposed on the transmission shaft, the brake caliper is mounted on the vehicle frame and is disposed corresponding to the brake disc. Since the transmission shaft is a high-speed shaft with a relatively fast rotation speed and a small torque, the requirement for the braking torque output to the brake caliper can be reduced, and thus a braking mechanism with a smaller volume and lighter weight can be selected and applied to the unmanned electric transporter of the present disclosure. The technical solution of the present disclosure is beneficial to reducing the volume and weight of the braking mechanism, thereby facilitating the installation on the vehicle assembly. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of an embodiment of the electric transporter of the present disclosure;

[0024] Figure 2 is a control block diagram of an embodiment of the unmanned electric transporter of the present disclosure;

[0025] Figure 3 is a cross-sectional view of a part of the structure of the unmanned electric transporter of the present disclosure.

[0026] Figure 4 is a structural block diagram of an embodiment of the master cylinder assembly;

[0027] Figure 5It is a braking control block diagram of an embodiment of the electric transfer vehicle of the present disclosure.

[0028] The description of the reference numerals is as follows:

[0029] 11. Driving motor; 12. Transmission shaft; 13. Reduction mechanism; 3. Tire;

[0030] 2. Braking mechanism; 21. Brake disc; 22. Brake caliper; 221. Brake wheel cylinder; 23. Master cylinder assembly; 231. Brake master cylinder; 232. Two-stage reduction assembly; 233. DC motor; 234. Control circuit; 4. Braking total control circuit; 5. Frame; 51. Motor mounting plate. Detailed implementation manners

[0031] Although the present disclosure can be easily embodied in different forms of embodiments, only some specific embodiments are shown in the drawings and will be described in detail in this specification. At the same time, it can be understood that this specification should be regarded as a demonstration of the principles of the present disclosure, rather than aiming to limit the present disclosure to what is described herein.

[0032] Therefore, a feature pointed out in this specification will be used to illustrate one feature of an embodiment of the present disclosure, rather than implying that each embodiment of the present disclosure must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined to show a possible system design, these features can also be used in other combinations that are not explicitly described. Therefore, unless otherwise stated, the described combination is not intended to be limiting.

[0033] In the embodiments shown in the drawings, the indication of directions (such as up, down, left, right, front and back) is used to explain that the structures and movements of various elements of the present disclosure are not absolute but relative. When these elements are in the positions shown in the drawings, these descriptions are appropriate. If the descriptions of the positions of these elements change, then the indication of these directions also changes accordingly.

[0034] Now, the exemplary embodiments will be described more fully with reference to the drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; on the contrary, these exemplary embodiments are provided so that the description of the present disclosure will be more comprehensive and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted.

[0035] The following further elaborates on the preferred embodiments of the present disclosure in conjunction with the drawings of this specification.

[0036] The present disclosure provides an electric transfer vehicle, which may be an unmanned electric transfer vehicle. Please refer to Figures 1 to 3 , Figure 1 which shows a schematic structural diagram of an embodiment of the electric transfer vehicle of the present disclosure; Figure 2 is a control block diagram of an embodiment of the unmanned electric transfer vehicle of the present disclosure, Figure 3 and is a sectional view of a part of the structure of the unmanned electric transfer vehicle of the present disclosure.

[0037] Specifically, the electric transfer vehicle includes a vehicle frame 5, wheels, a driving mechanism, and a braking mechanism 2; the wheels are rotatably mounted below the vehicle frame 5; the driving mechanism includes a driving motor 1, a speed reducer 13, and a transmission shaft 12; the driving motor 1 is fixedly connected to the vehicle frame 5; the input end of the speed reducer 13 is connected to the driving motor 1 through the transmission shaft 12, and the output end of the speed reducer 13 is connected to the wheels to drive the wheels to rotate; the braking mechanism 2 includes a master cylinder assembly 23, a brake caliper 22, and a brake disc 21, the brake disc 21 is circumferentially mounted on the transmission shaft 12, the brake caliper 22 is mounted on the vehicle frame 5 and is arranged corresponding to the brake disc 21; the master cylinder assembly 23 is used to drive the brake caliper 22 so that the brake caliper 22 brakes the brake disc 21, thereby braking the rotation of the wheels.

[0038] The number and installation positions of the wheels can be set in multiple groups according to the length of the electric transfer vehicle, and each group of wheels includes two left and right wheels respectively. In one embodiment, there are multiple wheels in the front-rear direction, which are the front wheels and the rear wheels respectively. It can be understood that the front wheels are always arranged in pairs; the rear wheels are also arranged in pairs.

[0039] The driving motor 1 is used to provide driving force for the wheels; the driving motor 1 can be a wheel-side motor. The driving motor 1 is connected with a transmission shaft 12. Since the driving motor 1 rotates at a high speed, the transmission shaft 12 is also called a high-speed shaft. The vehicle frame 5 includes a motor mounting plate 51, and the driving motor 1 is mounted on one side surface of the motor mounting plate 51.

[0040] In the unmanned electric transfer vehicle, a driving motor 1 can be provided corresponding to each front wheel and each rear wheel. It is also possible to provide driving motors 1 only corresponding to the front wheels, or only corresponding to the rear wheels.

[0041] During the operation of the unmanned electric transfer vehicle, the rotation speed and torque output by the driving motor 1 are transmitted to the speed reducer 13 through the transmission shaft 12, and the speed reducer 13 reduces the rotation speed to increase the torque. The number of speed reducers 13 is generally set corresponding to the number of driving motors 1. In one embodiment, the outer shell of the speed reducer 13 is directly connected to the wheels to drive the wheels to rotate.

[0042] Please refer to Figure 4 ,Figure 4 It is a structural block diagram of an embodiment of the master cylinder assembly. The braking mechanism 2 includes a master cylinder assembly 23, a brake caliper 22, and a brake disc 21. The master cylinder assembly 23 mainly includes a control circuit 234, a DC motor 233, a two-stage reduction assembly 232, and a brake master cylinder 231. The control circuit 234 is used to drive the DC motor 233 to operate. The DC motor 233 drives the push rod of the brake master cylinder 231 through the two-stage reduction assembly to establish oil pressure, thereby converting electrical energy into brake fluid pressure energy.

[0043] In one embodiment, the control circuit 234 can be an ECU (Electronic Control Unit) here; the two-stage reduction assembly 232 is a two-stage gear reduction lead screw nut mechanism. During normal operation and when there is no braking demand, the DC motor 233 is in a working state. Therefore, the DC motor 233 has no power consumption, and the static power consumption of the ECU is less than 100 μA. Therefore, in this embodiment, the master cylinder assembly 23 has a low power when there is no braking demand.

[0044] The brake caliper 22 includes a brake wheel cylinder 221 and friction pads. During braking, the brake master cylinder 231 builds up a braking hydraulic pressure, which in turn drives the brake wheel cylinder 221 to generate the same magnitude of pressure. The brake wheel cylinder 221 presses the friction pads, causing the friction pads to press against the brake disc 21 to achieve the purpose of braking.

[0045] In one embodiment, a stepped portion is provided on the transmission shaft 12, and the brake disc 21 is installed on the stepped portion. The stepped portion has a fixing and limiting effect on the brake disc 21, so that the brake disc 21 rotates at the same speed as the transmission shaft 12 and improves the installation stability.

[0046] In one embodiment, a brake caliper 22 bracket is installed on the other side surface of the motor mounting plate 51, and the brake caliper 22 is installed on the brake caliper 22 bracket. Therefore, the caliper, the caliper bracket and the vehicle frame 5 are relatively stationary.

[0047] The brake disc 21 of the technical solution of the present disclosure is provided on the transmission shaft 12, and the brake caliper 22 is installed on the vehicle frame 5 and is provided corresponding to the brake disc 21. Since the transmission shaft 12 is a high-speed shaft with a relatively fast rotation speed and a small torque, the requirement for the braking torque output to the brake caliper 22 can be reduced. Therefore, a brake mechanism 2 with a smaller volume and lighter weight can be selected and applied to the unmanned electric transporter of the present disclosure. The technical solution of the present disclosure is beneficial to reducing the volume and weight of the brake mechanism 2, thereby facilitating installation in the vehicle assembly.

[0048] In one embodiment, there are two master cylinder assemblies 23, including a front master cylinder assembly 23 installed on the front side of the vehicle frame 5 and a rear master cylinder assembly 23 installed on the rear side of the vehicle frame 5; there are multiple wheels in the front-rear direction, namely front wheels and rear wheels; there are multiple brake calipers 22, including a front brake caliper 22 corresponding to the front wheels and a rear brake caliper 22 corresponding to the rear wheels; the brake wheel cylinder 221 of the front brake caliper 22 is connected to the brake master cylinder 231 of the front master cylinder assembly 23, and the brake wheel cylinder 221 of the rear brake caliper 22 is connected to the brake master cylinder 231 of the rear master cylinder assembly 23 to the wheels.

[0049] It can be understood that there is at least one master cylinder port on the brake master cylinder 231, and the master cylinder ports on the brake master cylinder 231 are independent of each other. Each master cylinder port is connected to a separate wheel cylinder. The master cylinder port of the brake master cylinder 231 is connected to the brake wheel cylinder 221 through an oil pipe.

[0050] Please refer to Figure 1 and Figure 5 , Figure 5 and

[0051] is a brake control block diagram of an embodiment of the electric transfer vehicle of the present disclosure. In a specific embodiment, the wheels of the unmanned electric transfer vehicle include two front wheels and two rear wheels. The brake master cylinder 231 has two independent master cylinder ports. The two brake wheel cylinders 221 corresponding to the front wheels are respectively connected to the two master cylinder ports of the brake master cylinder 231 of the front master cylinder assembly 23, and the two brake wheel cylinders 221 corresponding to the rear wheels are respectively connected to the two master cylinder ports of the brake master cylinder 231 of the rear master cylinder assembly 23.

[0052] In the related art, only one brake master cylinder 231 is used. In this embodiment, by providing two brake master cylinders 231, the braking reliability of the whole vehicle is improved. When one of the brake master cylinders 231 fails to provide braking force, the other brake master cylinder 231 can still provide braking force for the whole vehicle.

[0053] Further, the driverless electric transporter further includes a CAN control network. The control circuit 234 is connected to the CAN control network. The control circuit 234 receives a braking signal through the CAN control network and drives the DC motor 233 to operate according to the braking signal. The DC motor 233 is used to drive the push rod of the master cylinder 231 to establish oil pressure. In this embodiment, the control circuits 234 of all the master cylinder assemblies 23 are nodes on the CAN control network, so that signal interaction can be carried out through the CAN control network, thereby improving the control efficiency.

[0054] In one embodiment, please refer to Figure 5 . The driverless electric transporter further includes a master brake control circuit 4. The master brake control circuit 4 is connected to the control circuit 234 of the master cylinder assembly 23, so that the master cylinder assembly 23 can respond to the braking signal issued by the master brake control circuit 4 in real time. In a specific embodiment, there are two front and rear braking mechanisms 2 provided on the electric transporter. During braking, the two braking mechanisms 2 cooperate. The master brake control circuit 4 is responsible for the distribution of the front and rear braking torques. The two braking mechanisms 2 control the corresponding braking fluid pressures output by their respective master cylinder assemblies 23 according to the braking torques allocated to them, and the two braking mechanisms 2 cooperate to achieve the braking of the whole vehicle. In this embodiment, two braking mechanisms 2 are provided, and the master brake control circuit 4 independently sends control signals to the front and rear braking structures respectively, so that it is easier to realize the distribution of the front and rear braking forces.

[0055] In order to improve the reliability of the operation of the braking mechanism 2, in one embodiment, it is provided that the driverless electric transporter further includes an emergency stop button and an emergency stop circuit connected to the emergency stop button. The emergency stop circuit is used to send a braking signal to the master brake control circuit 4 when the emergency stop button is pressed, and the master brake control circuit 4 controls the master cylinder assembly 23 to act to generate a braking force.

[0056] The emergency stop circuit directly transmits signals to the master brake control circuit 4 through wires, thereby improving the stability of the transmission of the emergency stop signal. When the CAN control network fails, the emergency stop instruction can be sent to the master brake control circuit 4 through the wire by pressing the emergency stop button.

[0057] Further, the driverless electric transporter further includes a timing circuit; the timing circuit is connected to the master brake control circuit 4; the timing circuit is used to record the duration after the emergency stop button is pressed, and the master brake control circuit 4 is used to control the master cylinder assembly 23 to stop acting to release the driving force when the duration after the emergency stop button is pressed reaches a first preset duration, so as to protect the braking system.

[0058] In this embodiment, the vehicle frame 5 includes a front wheel, a rear wheel, a front axle connected between the front wheels, and a rear axle connected between the rear wheels; the unmanned electric transporter further includes an electronic parking brake caliper 22; the electronic parking brake caliper 22 is arranged corresponding to the rear wheels to brake the rear wheels. The electronic parking brake caliper 22 is connected to the brake master control circuit 4 to respond in real time to the brake signal sent by the brake master control circuit 4.

[0059] In the above embodiment, the brake caliper 22 driven by the master cylinder assembly 23 is herein referred to as the ordinary brake caliper 22. In this embodiment, the brake caliper 22 arranged corresponding to the rear wheels further includes an electronic parking drive assembly; the electronic parking drive assembly is connected to the brake master control circuit 4 to respond to the brake signal sent by the brake master control circuit 4.

[0060] The electronic parking brake caliper 22 can adopt the same installation method as the ordinary brake caliper 22. The electronic parking caliper integrates an electronic parking drive assembly on the basis of the ordinary caliper to integrate the electronic parking function. The electronic parking drive assembly can include a drive motor 1 or a cylinder.

[0061] In one embodiment, after the control circuit 234 of the master cylinder assembly 23 receives an emergency stop command, it will immediately respond with the maximum brake pressure and maintain it for 10 seconds. When it is detected that the vehicle speed drops to 0, the control circuit 234 controls the electronic parking caliper to perform parking and releases the service brake pressure.

[0062] In this embodiment, the unmanned electric transporter has a power supply unit. When the voltage output by the power supply unit reaches a first high voltage, the electronic parking caliper releases the parking; when the voltage output by the power supply unit reaches a first low voltage, the electronic parking caliper performs parking.

[0063] The specific values of this first high voltage and first low voltage need to be determined according to the power supply voltage level of the whole vehicle. In one embodiment, the voltage output by the power supply unit of the whole vehicle is 540V, which belongs to a high voltage according to the power supply voltage level of the whole vehicle. This means that the vehicle is about to drive, so the electronic parking caliper is automatically controlled to release the parking. When the voltage output by the power supply unit reaches the first low voltage, it means that the vehicle has no driving requirement, so the electronic parking caliper is automatically controlled to perform parking.

[0064] Furthermore, in order to improve the working safety of the unmanned electric transporter, in this embodiment, the unmanned electric transporter further includes a pressure detection device connected to the control circuit 234; the pressure detection device is connected to the brake master cylinder 231 for detecting the pressure in the brake master cylinder 231; the control circuit 234 is used for outputting a first fault signal to the brake master control circuit 4 when the master cylinder pressure is abnormal.

[0065] The driverless electric transfer vehicle may further include a current detection device connected to the control circuit 234; the current detection device is connected to the bus of the DC motor 233 for detecting the bus current on the DC motor 233; the control circuit 234 is configured to output a second fault signal to the brake master control circuit 4 when the bus current on the DC motor 233 is abnormal.

[0066] The driverless electric transfer vehicle may further include a displacement detection device connected to the control circuit 234; the displacement detection device is connected to the piston of the brake master cylinder 231 for detecting the displacement of the piston of the brake master cylinder 231; the control circuit 234 is configured to output a third fault signal to the brake master control circuit 4 when the displacement of the piston of the brake master cylinder 231 is abnormal.

[0067] Although the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An electric transfer vehicle, characterized in that, Comprising: Frame; Wheels rotatably mounted below the frame; Drive mechanism, including a drive motor, a reduction gearbox, and a transmission shaft; The drive motor is fixedly connected to the frame; the input end of the reduction gearbox is connected to the drive motor through the transmission shaft, and the output end of the reduction gearbox is connected to the wheel to drive the wheel to rotate; Brake mechanism, including a master cylinder assembly, a brake caliper, and a brake disc. The brake disc is circumferentially mounted on the transmission shaft, and the brake caliper is mounted on the frame and is arranged corresponding to the brake disc; the master cylinder assembly is used to drive the brake caliper so that the brake caliper brakes the brake disc, thereby braking the transmission shaft to brake the rotation of the wheel; The master cylinder assembly includes a control circuit, a DC motor, a two-stage reduction component, and a brake master cylinder; The control circuit is used to drive the DC motor to operate. The DC motor drives the push rod of the brake master cylinder through the two-stage reduction component, so that the brake master cylinder supplies hydraulic oil to the brake caliper to drive the brake caliper to brake.

2. The electric transfer vehicle according to claim 1, characterized in that, There are two master cylinder assemblies, including a front master cylinder assembly mounted on the front side of the frame and a rear master cylinder assembly mounted on the rear side of the frame; The wheels are divided into front wheels and rear wheels in the front-rear direction; there are multiple brake calipers, including front brake calipers corresponding to the front wheels and rear brake calipers corresponding to the rear wheels; the brake wheel cylinders of the front brake calipers are connected to the brake master cylinders of the front master cylinder assemblies, and the brake wheel cylinders of the rear brake calipers are connected to the brake master cylinders of the rear master cylinder assemblies.

3. The electric transfer vehicle according to claim 1, characterized in that, The electric transporter also includes a brake total control circuit and a CAN control network; the brake total control circuit and the control circuit are both connected to the CAN control network; The brake total control circuit sends a brake signal to the control circuit through the CAN control network, and the control circuit drives the DC motor to operate according to the brake signal.

4. The electric transfer vehicle according to claim 3, characterized in that, The electric transporter also includes an emergency stop button and an emergency stop circuit connected to the emergency stop button; The emergency stop circuit is used to send a brake signal to the brake total control circuit when the emergency stop button is pressed, and the brake total control circuit controls the master cylinder assembly to act to generate a braking torque.

5. The electric transfer vehicle according to claim 4, characterized in that, The electric transporter also includes a timing circuit; the timing circuit is connected to the brake total control circuit; The timing circuit is used to record the duration after the emergency stop button is pressed, and the brake total control circuit is used to control the master cylinder assembly to stop acting to release the braking torque when the duration after the emergency stop button is pressed reaches a first preset duration.

6. The electric transfer vehicle according to claim 3, characterized in that, The electric transporter also includes an electronic parking drive assembly, and the electronic parking drive assembly is drivingly connected to the brake caliper corresponding to the rear wheels; The electronic parking drive assembly is connected to the brake total control circuit to drive the brake caliper to act for parking when the brake total control circuit sends a parking instruction.

7. The electric transfer vehicle according to claim 6, characterized in that, The electric transporter has a power supply unit; When the voltage output by the power supply unit reaches a first high voltage, the brake total control circuit controls the electronic parking drive assembly to drive the brake caliper to act to release the parking; When the voltage output by the power supply unit reaches the first low voltage, the brake master control circuit controls the electronic parking drive assembly to drive the brake caliper to act for parking.

8. The electric transfer vehicle according to claim 3, characterized in that, The electric transport vehicle further includes one or more of a pressure detection device, a current detection device, and a displacement detection device; Wherein, the pressure detection device is arranged in the brake master cylinder and is used to detect the pressure in the brake master cylinder; the control circuit is connected to the pressure detection device to output a first fault signal to the brake master control circuit when the pressure in the master cylinder is abnormal; The current detection device is connected to the bus of the DC motor and is used to detect the bus current on the DC motor; the control circuit is connected to the current detection device to output a second fault signal to the brake master control circuit when the bus current on the DC motor is abnormal; The displacement detection device is connected to the piston of the brake master cylinder and is used to detect the displacement of the piston of the brake master cylinder; the control circuit is connected to the displacement detection device to output a third fault signal to the brake master control circuit when the displacement of the piston of the brake master cylinder is abnormal.

9. The electric transfer vehicle according to claim 1, characterized in that, A stepped portion is provided on the transmission shaft, the brake disc is mounted on the stepped portion, and the stepped surface of the stepped portion abuts against the brake disc.

10. The electric transfer vehicle according to any one of claims 1 to 9, the electric transfer vehicle further includes a brake caliper bracket, the vehicle frame is provided with a motor mounting plate, the drive motor is mounted on one side surface of the motor mounting plate, the brake caliper bracket is mounted on the other side surface, and the brake caliper is mounted on the brake caliper bracket.

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