Lifting control system for logistics trailer

Abstract

The utility model discloses a lifting control system for a logistics trailer, which comprises a logistics trailer control part and a traction headstock control part communicated with the logistics trailer control part through a signal connecting device, the traction headstock control part comprises a traction controller and a manual operation box, and the logistics trailer control part comprises a push rod control unit; the push rod control unit comprises an ascending loop, a descending loop, an ascending switch and a descending switch, the ascending switch and the descending switch are used for controlling the ascending loop and the descending loop to be connected and disconnected, the ascending switch and the descending switch are in signal communication with the manual operation box, and the push rod control unit is connected with an electric push rod through the ascending loop and the descending loop. The traction vehicle head has no walking function, so that logistics transfer operation can be carried out after cargoes completely leave the ground; when a driver drives the vehicle, the function of a kick switch on the logistics trailer fails, and the vehicle is prevented from rolling the operator during running; when the logistics trailer is dragged, the trailer does not have a reversing function, and safety accidents caused by uncontrollable direction of the trailer are avoided.

Description

Technical Field

[0001] This utility model relates to the field of material trailer technology, specifically a lifting control system for logistics trailers. Background Technology

[0002] Factory logistics trailers are specialized vehicles used for the transport of goods within or around factories, production lines, and warehouses. They are primarily used in manufacturing, warehousing, and logistics scenarios, handling short-distance transfers of raw materials, semi-finished products, and finished goods. Their core function is to improve logistics efficiency within the factory area, reduce manual handling costs, and adapt to complex and confined operating environments.

[0003] Most existing logistics trailers are purely mechanical structures, requiring manual handling or forklift access, resulting in low efficiency, high labor intensity, and high handling costs. Some logistics trailers, however, incorporate hydraulic lifting or manual mechanical mechanisms, which are energy-intensive and complex to operate. As logistics scenarios demand higher loading and unloading efficiency, electrification, intelligentization, and automation have become key technological directions. Utility Model Content

[0004] The purpose of this invention is to provide a lifting control system for logistics trailers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A lifting control system for a logistics trailer includes a logistics trailer control unit and a tractor head control unit connected to the logistics trailer control unit via a signal connection device. The tractor head control unit includes a traction controller and a manual control box. The logistics trailer control unit includes a push rod control unit.

[0007] The push rod control unit includes an upward circuit, a downward circuit, and upward and downward switches for controlling the on / off state of the upward and downward circuits. The upward and downward switches are signal-connected to the manual control box. The push rod control unit is connected to an electric push rod through the upward and downward circuits.

[0008] As a further embodiment of this utility model: the rising switch is connected in series with a relay H1, the rising circuit includes a relay K1, the electromagnetic switch H11 of the relay H1 and the electromagnetic switch K12 of the relay K1 are connected in parallel and then connected in series with the relay K1, the electric push rod is provided with an electromagnetic switch K11 for controlling the rising of the electric push rod, and the electromagnetic switches H11, K11 and K12 are all normally open electromagnetic switches.

[0009] As a further embodiment of this utility model: the descent switch is connected in series with a relay H2, the descent circuit includes a relay K2, the electromagnetic switch K22 of the relay K2 is connected in parallel with the electromagnetic switch H21 of the relay H2 and then connected in series with the relay K2, the electric push rod is provided with an electromagnetic switch K21 for controlling the descent of the electric push rod, and the electromagnetic switches H21, K21 and K22 are all normally open electromagnetic switches.

[0010] As a further embodiment of this utility model: the push rod control unit is connected to a rising position detection sensor and a falling position detection sensor, the rising position detection sensor is connected in series with a relay X1, and the falling position detection sensor is connected in series with a relay X2.

[0011] As a further embodiment of this utility model: the relay K1 is connected in series with the electromagnetic switch X11 of the relay X1 and the electromagnetic switch H22 of the relay H2, and the relay K2 is connected in series with the electromagnetic switch X21 of the relay X2 and the electromagnetic switch H12 of the relay H1. The electromagnetic switches X11, H22, X21 and H12 are all normally closed electromagnetic switches.

[0012] As a further embodiment of this utility model: the push rod control unit is provided with an emergency stop switch, the emergency stop switch is connected in series with an emergency stop relay J, and the rising circuit and the falling circuit are connected in parallel and then connected in series with the emergency stop electromagnetic switch J of the emergency stop relay J.

[0013] As a further embodiment of this utility model: the up switch, down switch, and emergency stop switch are connected in parallel and then connected in series with a locomotive emergency stop switch. The locomotive emergency stop switch is located on the tractor head. The up switch, down switch, and emergency stop switch are all connected to the manual control box via signal connection devices. The manual control box is equipped with an up switch button, a down switch button, and an emergency stop switch button.

[0014] As a further embodiment of this utility model: the lifting switch is connected in parallel with a pedal switch, the pedal switch being located on the tractor head; the lowering switch is connected in parallel with a kick switch, the kick switch being located on the logistics trailer; the push rod control unit is provided with a cargo detection sensor, a time delay relay, and a relay G arranged in series, and the relay switch G of the relay G is connected in parallel with the lifting switch.

[0015] As a further embodiment of this utility model: the manual control box is provided with a power switch button, the power switch button is connected to the traction controller signal, the traction controller is connected to a power drive line, the power drive line is connected to a drive relay MC, and the electromagnetic switch MC of the drive relay MC is set in the power line to control the power on and off.

[0016] As a further embodiment of this utility model: the traction controller is connected to an anti-reverse signal and a safe operation signal. The anti-reverse signal is connected to the power contact of the signal connection device, and the safe signal is connected to the electromagnetic switch X12 of the relay X1 through the signal connection device. The electromagnetic switch X12 is a normally open electromagnetic switch.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Safety Operation Guarantee: Before the logistics trailer is fully lifted, the tractor unit has no driving function. Ensure that the goods are completely off the ground before proceeding with logistics transfer operations. When the driver is driving the vehicle, the foot switch on the logistics trailer is disabled to prevent the vehicle from running over the operator. When towing the logistics trailer, the vehicle has no reversing function to avoid safety accidents caused by uncontrollable vehicle direction.

[0019] 2. Electric lifting function: The logistics trailer uses an electric push rod to control the platform to lift and lower. It has a small installation volume, does not take up vehicle space, and is responsive, stable, and highly efficient.

[0020] 3. Automatic control function: The driver and cargo status can be detected by pedal induction switch or cargo detection sensor, and the lifting of the trailer can be further controlled to realize the automatic lifting of the trailer after the driver or cargo is in position. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the signal connection principle between the tractor and the logistics trailer in this embodiment;

[0022] Figure 2 This is a top view of the material trailer in this embodiment;

[0023] Figure 3 This is the front view of the material trailer in this embodiment;

[0024] Figure 4 This is a schematic diagram of the push rod control unit in this embodiment;

[0025] Figure 5 This is a schematic diagram of the push rod control unit structure in this embodiment;

[0026] In the diagram: 1-Electric push rod, 2-Push rod control unit, 3-Position detection sensor, 4-Emergency stop switch, 5-Foot kick switch, 6-Cargo detection sensor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 In this embodiment of the present invention, a lifting control system for a logistics trailer includes a logistics trailer control unit and a tractor head control unit connected to the logistics trailer control unit via a signal connection device. The tractor head control unit includes a traction controller and a manual control box, and the logistics trailer control unit includes a push rod control unit 2.

[0029] The push rod control unit 2 includes an lifting circuit, a lowering circuit, and lifting and lowering switches for controlling the on / off state of the lifting and lowering circuits. The lifting and lowering switches are connected to the manual control box via signals. The push rod control unit 2 is connected to an electric push rod 1 through the lifting and lowering circuits. An emergency stop switch 4 is externally connected to the push rod control unit 2. An emergency stop relay J is connected in series with the emergency stop relay J. The lifting and lowering circuits are connected in parallel and then connected in series with the emergency stop electromagnetic switch J of the emergency stop relay J. The lifting switch, lowering switch, and emergency stop 4 are connected in parallel and then connected in series with the tractor emergency stop switch. The tractor emergency stop switch is located on the tractor head. The lifting switch, lowering switch, and emergency stop 4 are all connected to the manual control box via signal connection devices. The manual control box is equipped with an lifting switch button, a lowering switch button, and an emergency stop switch button.

[0030] The push rod control unit 2 is externally connected to a position detection sensor 6, which includes an upward position detection sensor and a downward position detection sensor. The upward position detection sensor is connected in series with a relay X1, the downward position detection sensor is connected in series with a relay X2, the upward switch is connected in series with a relay H1, and the downward switch is connected in series with a relay H2.

[0031] The rising circuit includes relay K1, which is connected in series with electromagnetic switches X11 of relay X1 and H22 of relay H2. Electromagnetic switches H11 of relay H1 and K12 of relay K1 are connected in parallel and then in series with relay K1. An electromagnetic switch K11 for controlling the rising of electric push rod 1 is provided at electric push rod 1. Electromagnetic switches H11, K11, and K12 are all normally open electromagnetic switches. The falling circuit includes relay K2, which is connected in series with electromagnetic switches X21 of relay X2 and H12 of relay H1. Electromagnetic switches K22 of relay K2 and H21 of relay H2 are connected in parallel and then in series with relay K2. An electromagnetic switch K21 for controlling the falling of electric push rod 1 is connected to electric push rod 1. Electromagnetic switches H21, K21, and K22 are all normally open electromagnetic switches, while electromagnetic switches X11, H22, X21, and H12 are all normally closed electromagnetic switches.

[0032] The lift switch is connected in parallel with a pedal switch, located on the tractor unit. The pedal switch signal detects the driver's position and sends a signal to the controller. The controller then drives a relay to engage, and the relay output signal is connected in parallel with the lifting signal from the manual control box. This signal is supplied to the logistics trailer via a signal connection device to control the trailer's automatic lifting. The lower switch is connected in parallel with a foot switch 5, located on the logistics trailer. The foot switch 5 is used by the worker to control the trailer's descent. When the trailer needs to be lowered, the worker kicks the switch, and the switch signal controls the electric push rod to retract. The push rod control unit 2 contains a cargo detection sensor 6, a time-delay relay, and a relay G arranged in series. The relay switch G of relay G is connected in parallel with the lift switch. The cargo detection sensor 6 detects whether the cargo on the logistics trailer is in position; once in position, the trailer can automatically lift.

[0033] The manual control box contains a power switch button, which is connected to the traction controller. The traction controller is connected to a power drive circuit, which in turn connects to a drive relay MC. The electromagnetic switch MC of the drive relay MC is integrated into the power circuit to control the power supply. The traction controller is connected to an anti-reverse signal and a safety operation signal. The anti-reverse signal is connected to the power contact of the signal connection device. The safety signal is connected to the electromagnetic switch X12 of relay X1 through the signal connection device. Electromagnetic switch X12 is a normally open electromagnetic switch. The signal connection device primarily transmits the power supply, emergency stop signal, lifting signal, and lowering signal from the tractor unit to the trailer. The connection device also contains a connection confirmation switch. When the connection device is plugged into the tractor unit, the connection confirmation switch transmits a signal to the controller. Upon detecting the signal, the controller prevents the tractor unit from reversing.

[0034] In use, after the lifting signal from the tractor head is sent to the push rod control unit 2, the push rod control unit 2 first checks whether the lifting position detection sensor has a signal output. If there is an output, it drives relay X1 to engage, and the electromagnetic switch X11 circuit is disconnected, thus breaking the control lifting circuit and preventing the lifting action from being performed. If there is no output, relay X1 does not engage, the electromagnetic switch X11 circuit is closed, the lifting switch signal drives relay H1 to engage, and the electromagnetic switch H11 circuit is closed. At this time, since there is no descent signal, electromagnetic switch H22 remains closed. That is, electromagnetic switches K11, H22, and H11 in the lifting circuit are all in a connected state. The power signal directly drives relay K1 to engage, the electric push rod detects the closure of electromagnetic switch K11, the circuit is closed, and the push rod begins to extend.

[0035] When the push rod extends to its upper limit, the sensor detects the signal and drives relay X1 to engage, disconnecting the upward control signal circuit and ending the upward movement. Similarly, after the tractor's descent signal is sent to the control unit, the control unit first checks if the descent detection sensor outputs a signal. If there is an output, it drives relay X2 to engage, disconnecting the electromagnetic switch X21 circuit. At this moment, the control circuit is open, and the descent movement is not executed. If there is no output, relay X2 does not engage, the electromagnetic switch X21 circuit is closed, and the descent switch signal drives relay H2 to engage, closing the electromagnetic switch H21 circuit. Since there is no upward signal, electromagnetic switch H12 remains closed, and the power signal directly drives relay K2 to engage. The electric push rod detects the closure of the electromagnetic switch K21 circuit and begins to retract. When the push rod retracts to its lower limit, the sensor detects the signal and drives relay X2 to engage, disconnecting the descent control signal circuit and ending the retraction movement.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting control system for a logistics trailer, characterized in that, It includes a logistics trailer control unit and a tractor head control unit connected to the logistics trailer control unit via a signal connection device. The tractor head control unit includes a traction controller and a manual control box. The logistics trailer control unit includes a push rod control unit. The push rod control unit includes an upward circuit, a downward circuit, and upward and downward switches for controlling the on / off state of the upward and downward circuits. The upward and downward switches are signal-connected to the manual control box. The push rod control unit is connected to an electric push rod through the upward and downward circuits.

2. The lifting control system for a logistics trailer according to claim 1, characterized in that, The rising switch is connected in series with a relay H1. The rising circuit includes a relay K1. The electromagnetic switch H11 of the relay H1 and the electromagnetic switch K12 of the relay K1 are connected in parallel and then connected in series with the relay K1. The electric push rod is provided with an electromagnetic switch K11 for controlling the rising of the electric push rod. The electromagnetic switches H11, K11, and K12 are all normally open electromagnetic switches.

3. A lifting control system for a logistics trailer according to claim 2, characterized in that, The descent switch is connected in series with a relay H2. The descent circuit includes a relay K2. The electromagnetic switch K22 of the relay K2 is connected in parallel with the electromagnetic switch H21 of the relay H2 and then connected in series with the relay K2. The electric push rod is provided with an electromagnetic switch K21 for controlling the descent of the electric push rod. The electromagnetic switches H21, K21, and K22 are all normally open electromagnetic switches.

4. A lifting control system for a logistics trailer according to claim 3, characterized in that, The push rod control unit is connected to a rising position detection sensor and a falling position detection sensor. The rising position detection sensor is connected in series with a relay X1, and the falling position detection sensor is connected in series with a relay X2.

5. A lifting control system for a logistics trailer according to claim 4, characterized in that, The relay K1 is connected in series with the electromagnetic switch X11 of relay X1 and the electromagnetic switch H22 of relay H2. The relay K2 is connected in series with the electromagnetic switch X21 of relay X2 and the electromagnetic switch H12 of relay H1. Electromagnetic switches X11, H22, X21 and H12 are all normally closed electromagnetic switches.

6. A lifting control system for a logistics trailer according to claim 1, characterized in that, The push rod control unit is equipped with an emergency stop switch, which is connected in series with an emergency stop relay J. The rising circuit and the falling circuit are connected in parallel and then connected in series with the emergency stop electromagnetic switch J of the emergency stop relay J.

7. A lifting control system for a logistics trailer according to claim 1, characterized in that, The up switch, down switch, and emergency stop switch are connected in parallel and then connected in series with the locomotive emergency stop switch. The locomotive emergency stop switch is located on the tractor. The up switch, down switch, and emergency stop switch are all connected to the manual control box via signal connection devices. The manual control box is equipped with an up switch button, a down switch button, and an emergency stop switch button.

8. A lifting control system for a logistics trailer according to claim 1, characterized in that, The rise switch is connected in parallel with a pedal switch, which is located on the tractor head. The fall switch is connected in parallel with a kick switch, which is located on the logistics trailer. The push rod control unit is equipped with a cargo detection sensor, a time delay relay, and a relay G arranged in series. The relay switch G of the relay G is connected in parallel with the rise switch.

9. A lifting control system for a logistics trailer according to claim 1, characterized in that, The manual control box is equipped with a power switch button, which is connected to the traction controller. The traction controller is connected to a power drive line, which is connected to a drive relay MC. The electromagnetic switch MC of the drive relay MC is set in the power line to control the power supply.

10. A lifting control system for a logistics trailer according to claim 4, characterized in that, The traction controller is connected to an anti-reverse signal and a safe operation signal. The anti-reverse signal is connected to the power contact of the signal connection device, and the safe operation signal is connected to the electromagnetic switch X12 of the relay X1 through the signal connection device. The electromagnetic switch X12 is a normally open electromagnetic switch.

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