Automatic braking device of car with detachable carriage

Abstract

The utility model discloses an automatic braking device of an automobile with a detachable carriage, and belongs to the technical field of transportation equipment. The starting button is arranged in a vehicle cab, the limiting switch is connected to a stand column at the front end of a vehicle chassis, the control circuit is used for controlling positioning loading and unloading between the vehicle chassis and a box body, and a positioning deviation correcting device used for assisting loading and unloading is further arranged between the vehicle chassis and the box body. The control circuit is formed by connecting a limit switch with a start button, an intermediate relay, an electromagnetic gas valve and a brake cylinder in sequence, and can also be formed by connecting a programmable logic controller (PLC) 1 with the limit switch, the start button, the electromagnetic gas valve and the brake cylinder. According to the utility model, the brake device is designed through the limit switch and the electromagnetic gas valve, and the control circuit can adopt conventional start button control and PLC control, so that the automation degree of the detachable automobile in the positioning and assembling process is improved, the manual labor amount is reduced, and the working efficiency and the positioning precision are improved.

Description

Technical Field

[0001] This utility model belongs to the field of transportation equipment technology, specifically relating to an automatic braking device for a detachable truck body. Background Technology

[0002] To address the issue of low efficiency in transporting goods by requiring loading before unloading, a device with a hook-lift type cargo box is designed on the chassis. This can solve the problem of high utilization rate of transport vehicles. However, the cargo box needs to be unloaded by tilting the chassis, which is not suitable for most heavy transport vehicles and requires a large amount of manual labor for loading and unloading.

[0003] To improve loading and unloading efficiency, existing devices are designed with structures that can be lifted and unloaded along with the goods. For example, a positioning and correction buffer device for detachable vehicles, authorized by announcement number CN222062125U, discloses a fixing device, a vertical positioning device, and / or a left and right correction buffer device that are installed between the lower frame and the upper frame for positioning and fastening in the front and rear directions of the frame. The positioning and correction functions of the structure are achieved through the positioning and coordination of the loading and unloading of goods.

[0004] Currently, the reversing and positioning of these vehicles all require manual supervision or the sound of impact when the vehicle is assembled to determine whether it is in place. The level of automation is low. Therefore, there is an urgent need to design an automatic braking assistance device to improve the efficiency of positioning and assembly. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an automatic braking device for detachable truck bodies. By using limit switches and solenoid valves in the control circuit for braking, the automation level of detachable truck bodies during the positioning and assembly process is improved, reducing manual labor, improving work efficiency and positioning accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic braking device for a detachable vehicle, including a start button installed in the driver's cab, a limit switch connected to a column at the front end of the vehicle chassis, and a control circuit for controlling the positioning and unloading between the vehicle chassis and the body, wherein a positioning and correction device for assisting loading and unloading is also provided between the vehicle chassis and the body.

[0007] The control circuit consists of a limit switch connected in sequence to a start button, an intermediate relay, a solenoid valve, and a brake caliper. The input of the limit switch is connected to an external power supply, which is fixed on the vehicle chassis. Its output is connected to the GND line. One end of the start button is connected to the limit switch, and the other end is connected to the positive terminal of the intermediate relay. The output of the intermediate relay is connected to pin 1 of the solenoid valve. The negative terminal of the intermediate relay and pin 2 of the solenoid valve are both connected in parallel to the GND line.

[0008] The solenoid valve is normally open. When the power is off, ports A2 and R3 are connected. Port A2 is externally connected to the lower air circuit interface of the brake caliper, and port R3 is externally connected to a compressed air source. When the power is on, ports A2 and 1P are connected, and compressed air is released through port 1P.

[0009] Furthermore, the control circuit shall have at least one path, and when two or more paths are provided, they shall be connected together in parallel.

[0010] Furthermore, the start button adopts an Omron A22NE-P series or Delixi LAY7-11D illuminated push-button switch with an input voltage of 12V / 24V; the solenoid valve adopts a VT307-6G1-02 two-position three-way solenoid valve when the working voltage is 12V, and a VT307-5G1-02 two-position three-way solenoid valve when the working voltage is 24V.

[0011] Furthermore, the limit switch is a DC three-wire PNP normally open proximity switch of model LJ18A3-5-Z / BY or a DC three-wire NPN normally open proximity switch, with an operating voltage of DC10~36V.

[0012] Furthermore, the positioning and correction device includes a lower slide frame symmetrically arranged on both sides of the upper end of the vehicle chassis and an upper slide frame symmetrically arranged on both sides of the lower end of the housing. The lower slide frame consists of a base plate, two vertical plates connected to both sides of the base plate, and a positioning slide plate rotatably connecting the two vertical plates. The upper surfaces of the two vertical plates are set as downward inclined surfaces from the inside out. The upper center of the positioning slide plate is provided with a flared groove, and the bottom surface of the upper slide frame matches the inclined surface of the vertical plate and is positioned and contacted with the flared groove of the positioning slide plate. A connecting block is fixedly connected to each end of the positioning slide plate near the two vertical plates. The connecting block has a through hole in a direction perpendicular to the vertical plate, and the vertical plate has a second through hole corresponding to the through hole. The upper slide frame and the lower slide frame are positioned and fixed by connecting pins passing through the through hole and the second through hole in sequence.

[0013] This utility model also provides an automatic braking device for a detachable vehicle, including a start button and a programmable logic controller (PLC1) installed in the driver's cab, a limit switch connected to a column at the front of the vehicle chassis, and a PLC control circuit based on the PLC1 for controlling the positioning and unloading between the vehicle chassis and the body. A positioning and correction device for assisting loading and unloading is also provided between the vehicle chassis and the body.

[0014] The programmable controller PLC1 is equipped with a system power port, a drive power port, a signal ground port, a system ground port, an analog signal acquisition port IAVOO, and digital signal PWM signal output ports Q01 and Q02. The programmable controller PLC1 is also connected to an RTC clock module via an IIC bus, and the limit switch is also connected to an external power supply, which is fixed on the vehicle chassis.

[0015] The PLC control circuit includes a main control circuit, a signal acquisition circuit, and a signal control circuit. The main control circuit consists of a start button connected to the programmable controller PLC1. One end of the start button is connected to a limit switch, and the other end is connected to the analog signal acquisition port IAVOO. The signal acquisition circuit consists of a limit switch connected to the programmable controller PLC1. The input end of the limit switch is connected to the system power port and the drive power port, and the output end is connected to the GND line on the signal ground port and the system ground port. The signal control circuit consists of a solenoid valve connected to the programmable controller PLC1 and a brake cylinder. Pin 2 of the solenoid valve is connected to the switch signal PWM output ports Q01 and Q02, and pin 1 is connected to the GND line on the signal ground port and the system ground port. The solenoid valve is normally open. When the power is off, ports A2 and R3 are open. The external connection of port A2 is to the lower air circuit interface of the brake cylinder, and the external connection of port R3 is to a compressed air source. When the power is on, ports A2 and 1P are open, and compressed air is released through port 1P.

[0016] Furthermore, at least one signal control circuit is provided on the programmable controller PLC1. One solenoid valve connected to one brake sub-pump constitutes one signal control circuit. When two or more circuits are provided, they are connected to the programmable controller PLC1 in parallel.

[0017] Furthermore, the start button adopts an Omron A22NE-P series or Delixi LAY7-11D illuminated push-button switch with an input voltage of 12V / 24V; the solenoid valve adopts a VT307-6G1-02 two-position three-way solenoid valve when the working voltage is 12V, and a VT307-5G1-02 two-position three-way solenoid valve when the working voltage is 24V.

[0018] Furthermore, the RTC clock module is model DS1342+; the limit switch is a DC three-wire PNP normally open proximity switch of model LJ18A3-5-Z / BY or a DC three-wire NPN normally open proximity switch, with an operating voltage of DC10~36V.

[0019] Furthermore, the positioning and correction device includes a lower slide frame symmetrically arranged on both sides of the upper end of the vehicle chassis and an upper slide frame symmetrically arranged on both sides of the lower end of the housing. The lower slide frame consists of a base plate, two vertical plates connected to both sides of the base plate, and a positioning slide plate rotatably connecting the two vertical plates. The upper surfaces of the two vertical plates are set as downward inclined surfaces from the inside out. The upper center of the positioning slide plate is provided with a flared groove, and the bottom surface of the upper slide frame matches the inclined surface of the vertical plate and is positioned and contacted with the flared groove of the positioning slide plate. A connecting block is fixedly connected to each end of the positioning slide plate near the two vertical plates. The connecting block has a through hole in a direction perpendicular to the vertical plate, and the vertical plate has a second through hole corresponding to the through hole. The upper slide frame and the lower slide frame are positioned and fixed by connecting pins passing through the through hole and the second through hole in sequence.

[0020] The beneficial effects of this utility model are: by designing a limit switch and an electromagnetic valve for the control circuit of the brake, this utility model improves the automation level of the positioning and assembly process of detachable automobiles, reduces manual labor, and improves work efficiency and positioning accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the control circuit connection in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the control circuit connection in Embodiment 2 of the present invention;

[0023] Figure 3 This is a structural diagram of a detachable vehicle.

[0024] Figure 4 for Figure 3 A three-dimensional structural diagram of the mid-glide section;

[0025] Figure 5 for Figure 3 A schematic diagram of the elevation structure connecting the middle and upper slides.

[0026] In the diagram, 1-vehicle chassis, 2-pillar, 3-box body, 4-lifting outrigger, 5-vehicle cab, 6-slide frame, 601-base plate, 602-vertical plate, 603-connecting block, 604-connecting pin, 605-positioning slide plate, 7-upper slide frame. Detailed Implementation

[0027] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 3-5 As shown, a loading and unloading positioning device for a detachable truck body is disclosed, including a vehicle cab 5, a vehicle chassis 1, and a box body 3. A column 2 is fixed at the front center of the vehicle chassis 1. A positioning and correction device for assisting loading and unloading is provided between the vehicle chassis 1 and the box body 3. During the positioning and loading / unloading process of the vehicle chassis 1 and the box body 3, the box body 3 is supported by lifting outriggers 4. The vehicle cab 5 controls the vehicle chassis 1 to reverse under the box body 3. When the reversing positioning is completed, the column 2 and the front face of the box body 3 have a certain distance or contact connection. The positioning and fixing are completed by human judgment, and then the lifting outriggers 4 are retracted and the brake is applied.

[0029] The positioning and correction device includes a lower slide frame 6 symmetrically installed on both sides of the upper end of the vehicle chassis 1 and an upper slide frame 7 symmetrically installed on both sides of the lower end of the housing 3. The lower slide frame 6 consists of a base plate 601, two vertical plates 602 connected to both sides of the base plate 601, and a positioning slide plate 605 rotatably connecting the two vertical plates 602. The upper end surfaces of the two vertical plates 602 are set as downward inclined surfaces from the inside out. The upper middle part of the positioning slide plate 605 is provided with a flared groove. The bottom surface of the upper slide frame 7 matches the inclined surface of the vertical plates 602 and is positioned and contacted with the flared groove of the positioning slide plate 605. A connecting block 603 is fixedly connected to each end of the positioning slide plate 605 near the two vertical plates 602. The connecting block 603 has a through hole in a direction perpendicular to the vertical plate 602. The vertical plate 602 has a second through hole corresponding to the through hole. The upper slide frame 7 and the lower slide frame 6 are positioned and fixed by a connecting pin 604 passing through the through hole and the second through hole in sequence.

[0030] By setting the positioning slide plate 605, when the upper slide 7 falls into the lower slide 6, it first falls into the flared groove of the positioning slide plate 605. Since the bottom of the upper slide 7 is an inclined surface, the positioning slide plate 605 will rotate with the upper slide 7 during the falling process, making the upper slide 7 fall more stably. Initially, high precision is not required. After positioning by the flared groove, there will be no misalignment during the falling process of the positioning slide plate 605 rotating. The upper slide 7 and the lower slide 6 can be accurately installed together. At the same time, the positioning slide plate 605 has a certain buffering effect.

[0031] An automatic braking device is installed during the positioning and loading / unloading process of the above-mentioned detachable truck body to realize the function of electrically controlled braking. Taking the control circuit connected to the two solenoid valves and the brake cylinder as an example, the following Examples 1 and 2 are respectively a circuit control device using PLC control and a circuit control device directly using limit switches.

[0032] Example 1: As Figure 1 As shown, this utility model provides an automatic braking device for a detachable vehicle, including a start button ST1 and a programmable logic controller (PLC) 1 installed in the driver's cab 5, a limit switch 1 connected to a column 2 at the front end of the vehicle chassis 1, and a PLC control circuit based on the PLC 1 for controlling the positioning and loading / unloading between the vehicle chassis 1 and the body 3.

[0033] The programmable logic controller (PLC1) is equipped with a system power port, a drive power port, a signal ground port, a system ground port, an analog signal acquisition port IAVOO, and digital signal PWM output ports Q01 and Q02. The PLC1 is also connected to an RTC clock module via an IIC bus. The RTC clock module is model DS1342+. The limit switch 1 is also connected to an external power supply, which is fixed on the vehicle chassis 1. The limit switch 1 is a DC three-wire PNP normally open proximity switch of model LJ18A3-5-Z / BY or a DC three-wire NPN normally open proximity switch. When the limit switch is PNP type, it outputs a high-level signal when powered on, and when it is NPN type, it outputs a low-level signal when powered on.

[0034] The PLC control circuit includes a main control circuit, a signal acquisition circuit, and a signal control circuit. The main control circuit consists of a start button ST1 connected to the programmable controller PLC1. One end of the start button ST1 is connected to the limit switch 1, and the other end is connected to the analog signal acquisition port IAVOO. The start button ST1 is an Omron A22NE-P series or Delixi LAY7-11D illuminated push button switch.

[0035] The signal acquisition circuit consists of limit switch 1 connected to programmable controller PLC1. The input terminal of limit switch 1 is connected to the system power port and the drive power port, and the output terminal is connected to the GND line on the signal ground port and the system ground port.

[0036] The signal control circuit consists of two solenoid valves connected to the programmable controller PLC1, which are respectively connected to brake cylinder 1 and brake cylinder 2. The pin 2 of the two solenoid valves is connected to the switch quantity PWM signal output ports Q01 and Q02, respectively, and the pin 1 is connected to the GND line of the signal ground port and the system ground port.

[0037] Both solenoid valves are VT307-6G1-02 two-position three-way solenoid valves. The solenoid valves are normally open. When the power is off, ports A2 and R3 are connected. Port A2 is externally connected to the lower air circuit interface of brake caliper 1 / brake caliper 2. Port R3 is externally connected to a compressed air source. When the power is on, ports A2 and 1P are connected, and compressed air is released through port 1P.

[0038] Working principle and process:

[0039] The PLC control circuit has two operating voltages: 12V or 24V. During operation, the external power supply, programmable controller PLC1, limit switch 1, start button ST1, and solenoid valve are all selected to operate under the same operating voltage.

[0040] When the start button ST1 is turned on, the PLC control circuit starts to work. When the vehicle has not reached the positioning position, that is, when the limit switch 1 has not received a signal, Q01 or Q02 does not output. The solenoid valve is normally open. At this time, the air valve between the solenoid valve and the brake caliper is open. Compressed air enters the two brake calipers through port R3 and port A2 to maintain the reversing process of the vehicle.

[0041] When limit switch 1 receives the housing position signal, programmable controller PLC1 controls Q01 or Q02 to output a signal, and the A2 port of the solenoid valve is connected to the 1P port. At this time, since the 1P port is the compressed air release port, the air valve between the solenoid valve and the brake caliper is not connected, that is, there is no air path for compressed air to enter the two brake calipers, thereby controlling the brake caliper to cut off the air supply.

[0042] In addition, the RTC clock module inside the programmable controller PLC1 is used to delay power-off and thus unlock the automatic braking action. After the car body is positioned and installed, the start button is turned off, and then the manual braking is performed.

[0043] Example 2: Figure 2 As shown, this utility model provides an automatic braking device for a detachable vehicle, including two start buttons ST1 and ST2 installed in the driver's cab 5, limit switches 1 and 2 connected to the column 2 at the front end of the vehicle chassis 1, and a control circuit for controlling the positioning and loading / unloading between the vehicle chassis 1 and the box 3.

[0044] The control circuit consists of two limit switches connected in parallel, which are sequentially connected to the start button, intermediate relay, solenoid valve, and brake caliper. The input terminals of both limit switches are connected to an external power supply, which is fixed on the vehicle chassis 1. Their output terminals are connected together via a GND line. Limit switches 1 and 2 are both DC three-wire PNP normally open limit switches of model LJ18A3-5-Z / BY or DC three-wire NPN normally open high-level limit switches. When the limit switch is PNP type, it outputs a high-level signal when energized, and when the limit switch is NPN type, it outputs a low-level signal when energized.

[0045] Both start buttons ST1 and ST2 use Omron A22NE-P series or Delixi LAY7-11D illuminated push button switches; one end of the start button is connected to limit switch 2, and the other end is connected to the positive terminal of the intermediate relay. The output terminal of the intermediate relay is connected to pin 1 of the solenoid valve. The negative terminals of the two intermediate relays and the pins 2 of the two solenoid valves are all connected in parallel to the GND line.

[0046] Both solenoid valves are VT307-6G1-02 two-position three-way solenoid valves. The solenoid valves are normally open. When the power is off, ports A2 and R3 are connected. Port A2 is externally connected to the lower air circuit interface of brake caliper 1 / brake caliper 2. Port R3 is externally connected to a compressed air source. When the power is on, ports A2 and 1P are connected, and compressed air is released through port 1P.

[0047] Working principle and process:

[0048] The control circuit has two operating voltages, 12V or 24V. During operation, the external power supply, limit switch 1, limit switch 2, start button ST1, start button ST2 and solenoid valve are all selected to operate under the same operating voltage.

[0049] When the start button ST1 is turned on, the control circuit starts to work. When the vehicle has not reached the positioning position, that is, when the limit switch 1 has not received a signal, the solenoid valve is normally open. At this time, the air valve between the solenoid valve and the brake caliper is open, and compressed air enters the two brake calipers through port R3 and port A2 to maintain the reversing process of the vehicle.

[0050] When limit switch 1 or limit switch 2 receives the housing position signal, start buttons ST1 and ST2 receive a level signal and close, thereby powering the intermediate relay to close its normally open contact, which in turn powers the solenoid valve. The A2 port of the solenoid valve is connected to the 1P port. At this time, since the 1P port is the compressed air release port, the air valve between the solenoid valve and the brake caliper is not connected, that is, there is no air path for compressed air to enter the two brake calipers, thereby controlling the brake calipers to cut off the air brake. After the positioning and installation of the car body is completed, turn off the start button, and then switch to manual braking and park the vehicle.

[0051] This control circuit design can save manual monitoring of the positioning and loading / unloading process of detachable vehicles, and improve the automation level and work efficiency of loading and unloading vehicles by assisting the positioning and correction device in the positioning process.

[0052] This invention utilizes limit switches and electromagnetic valves in the control circuit for braking, thereby improving the automation level of detachable automobiles during the positioning and assembly process, reducing manual labor, and increasing work efficiency and positioning accuracy.

[0053] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An automatic braking device for a detachable vehicle body, characterized in that: It includes a start button installed in the driver's cab (5), a limit switch connected to the column (2) at the front end of the vehicle chassis (1), and a control circuit for controlling the positioning and loading / unloading between the vehicle chassis (1) and the box (3). A positioning and correction device for assisting loading / unloading is also provided between the vehicle chassis (1) and the box (3). The control circuit consists of a limit switch connected in sequence to a start button, an intermediate relay, a solenoid valve, and a brake cylinder. The input end of the limit switch is connected to an external power supply, which is fixed on the vehicle chassis (1). Its output end is connected to the GND line. One end of the start button is connected to the limit switch, and the other end is connected to the positive terminal of the intermediate relay. The output end of the intermediate relay is connected to pin 1 of the solenoid valve. The negative terminal of the intermediate relay and pin 2 of the solenoid valve are both connected in parallel to the GND line. The solenoid valve is normally open. When the power is off, ports A2 and R3 are connected. Port A2 is externally connected to the lower air circuit interface of the brake caliper, and port R3 is externally connected to a compressed air source. When the power is on, ports A2 and 1P are connected, and compressed air is released through port 1P.

2. The automatic braking device for a detachable vehicle according to claim 1, characterized in that: The control circuit shall have at least one circuit, and when two or more circuits are provided, they shall be connected together in parallel.

3. The automatic braking device for a detachable vehicle according to claim 1, characterized in that: The start button is an Omron A22NE-P series or Delixi LAY7-11D illuminated push-button switch with an input voltage of 12V / 24V; the solenoid valve is a VT307-6G1-02 two-position three-way solenoid valve with a working voltage of 12V, and a VT307-5G1-02 two-position three-way solenoid valve with a working voltage of 24V.

4. The automatic braking device for a detachable vehicle according to claim 1, characterized in that: The limit switch is a DC three-wire PNP normally open proximity switch of model LJ18A3-5-Z / BY or a DC three-wire NPN normally open proximity switch, with an operating voltage of DC10~36V.

5. The automatic braking device for a detachable vehicle according to claim 1, characterized in that: The positioning and correction device includes a sliding frame (6) symmetrically arranged on both sides of the upper end of the vehicle chassis (1) and an upper sliding frame (7) symmetrically arranged on both sides of the lower end of the housing (3). The sliding frame (6) consists of a base plate (601), two vertical plates (602) connected to both sides of the base plate (601), and a positioning slide plate (605) rotatably connecting the two vertical plates (602). The upper surfaces of the two vertical plates (602) are set as downward inclined surfaces from the inside out. The upper center of the positioning slide plate (605) is provided with a flared groove. The bottom surface of the upper slide (7) matches the inclined surface of the vertical plate (602) and is positioned and connected to the flared groove of the positioning slide plate (605); a connecting block (603) is fixedly connected to each end of the positioning slide plate (605) near the two vertical plates (602). The connecting block (603) has a through hole in a direction perpendicular to the vertical plate (602), and the vertical plate (602) has a second through hole corresponding to the through hole. The upper slide (7) and the lower slide (6) are positioned and fixed by the connecting pin (604) passing through the through hole and the second through hole in sequence.

6. An automatic braking device for a detachable cargo box vehicle, characterized in that: It includes a start button and a programmable logic controller (PLC1) installed in the driver's cab (5), a limit switch connected to the column (2) at the front end of the vehicle chassis (1), and a PLC control circuit based on the programmable logic controller (PLC1) for controlling the positioning and loading / unloading between the vehicle chassis (1) and the box (3). A positioning and correction device for assisting loading / unloading is also provided between the vehicle chassis (1) and the box (3). The programmable controller PLC1 is equipped with a system power port, a drive power port, a signal ground port, a system ground port, an analog quantity acquisition port IAVOO, and digital quantity PWM signal output ports Q01 and Q02. The programmable controller PLC1 is also connected to an RTC clock module via an IIC bus. The limit switch is also connected to an external power supply, which is fixed on the vehicle chassis (1). The PLC control circuit includes a main control circuit, a signal acquisition circuit, and a signal control circuit. The main control circuit consists of a start button connected to the programmable controller PLC1. One end of the start button is connected to a limit switch, and the other end is connected to the analog signal acquisition port IAVOO. The signal acquisition circuit consists of limit switches connected to the programmable controller PLC1. The input terminals of the limit switches are connected to the system power port and the drive power port, and the output terminals are connected to the GND lines on the signal ground port and the system ground port. The signal control circuit consists of a solenoid valve connected to the programmable controller PLC1 and the brake caliper. Pin 2 of the solenoid valve is connected to the PWM signal output ports Q01 and Q02, and pin 1 is connected to the GND lines on the signal ground port and the system ground port. The solenoid valve is normally open. When the power is off, ports A2 and R3 are open. Port A2 is connected to the lower air path interface of the brake caliper, and port R3 is connected to a compressed air source. When the power is on, ports A2 and 1P are open, and compressed air is released through port 1P.

7. The automatic braking device for a detachable vehicle according to claim 6, characterized in that: At least one signal control circuit is provided on the programmable controller PLC1. One solenoid valve connected to one brake pump constitutes one signal control circuit. When two or more circuits are provided, they are connected to the programmable controller PLC1 in parallel.

8. The automatic braking device for a detachable vehicle according to claim 6, characterized in that: The start button is an Omron A22NE-P series or Delixi LAY7-11D illuminated push-button switch with an input voltage of 12V / 24V; the solenoid valve is a VT307-6G1-02 two-position three-way solenoid valve with a working voltage of 12V, and a VT307-5G1-02 two-position three-way solenoid valve with a working voltage of 24V.

9. An automatic braking device for a detachable vehicle according to claim 6, characterized in that: The RTC clock module is model DS1342+; the limit switch is a DC three-wire PNP normally open proximity switch of model LJ18A3-5-Z / BY or a DC three-wire NPN normally open proximity switch, with an operating voltage of DC10~36V.

10. An automatic braking device for a detachable vehicle according to claim 6, characterized in that: The positioning and correction device includes a sliding frame (6) symmetrically arranged on both sides of the upper end of the vehicle chassis (1) and an upper sliding frame (7) symmetrically arranged on both sides of the lower end of the housing (3). The sliding frame (6) consists of a base plate (601), two vertical plates (602) connected to both sides of the base plate (601), and a positioning slide plate (605) rotatably connecting the two vertical plates (602). The upper surfaces of the two vertical plates (602) are set as downward inclined surfaces from the inside out. The upper center of the positioning slide plate (605) is provided with a flared groove. The bottom surface of the upper slide (7) matches the inclined surface of the vertical plate (602) and is positioned and connected to the flared groove of the positioning slide plate (605); a connecting block (603) is fixedly connected to each end of the positioning slide plate (605) near the two vertical plates (602). The connecting block (603) has a through hole in a direction perpendicular to the vertical plate (602), and the vertical plate (602) has a second through hole corresponding to the through hole. The upper slide (7) and the lower slide (6) are positioned and fixed by the connecting pin (604) passing through the through hole and the second through hole in sequence.

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