Method for electrically leveling a tailgate of a vehicle

Abstract

The present application relates to the technical field of freight handling equipment, and discloses a method for electrically leveling a truck tailgate, specifically comprising the following steps: S11: an inductive boss is arranged in a turnover push rod of the truck tailgate, and a travel switch is arranged; the inductive boss has a certain length L; S12: the length L of the inductive boss is within the triggering interval of the travel switch; if the girder assembly is welded on the truck girder just horizontally, the inductive boss stops after running a distance of 0.5L after triggering, so that the inductive boss can make the travel switch stop at the middle position each time, thereby ensuring the horizontalness of the tailgate surface. The position of the inductive boss in the turnover push rod is controlled by rotating a fine adjustment knob, so as to adjust the extension length of the turnover push rod, adjust the levelness of the tailgate surface, and make the tailgate surface keep horizontal with the truck bed plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of freight handling equipment, in particular to a method for electrically leveling a truck tailgate. BACKGROUND

[0002] With the development of China's logistics industry, the demand for vehicle tailgates is growing. The truck tailgate, as a lifting and handling device installed at the tail of a truck or various vehicles, can greatly improve the efficiency and convenience of loading and unloading, and is widely used in various industries.

[0003] Most truck tailgates are fixed to the tail beam of the truck bed by a bracket with five hydraulic cylinders. The hydraulic cylinders control the overturning and lifting of the load-bearing plate, making it convenient for loading and unloading. The existing tailgate installation is achieved by manually adjusting the nut of the overturning push rod to realize the horizontality of the tailgate plate. This increases the difficulty of adjustment, and the operator needs to adjust the horizontality by adjusting the tailgate door button, which is not only time-consuming and labor-intensive, but also has safety hazards after each adjustment. SUMMARY

[0004] The purpose of the present application is to provide a method for electrically leveling a truck tailgate. By rotating the fine adjustment knob to control the position of the sensing boss in the overturning push rod, the length of the overturning push rod can be adjusted, and the levelness of the tailgate plate can be adjusted. The purpose is to solve the problem of manually adjusting the nut of the overturning push rod to realize the horizontality of the tailgate plate, which increases the difficulty of adjustment.

[0005] The present application is achieved as follows. The method for electrically leveling a truck tailgate specifically includes the following steps:

[0006] S11: An inductive boss and a travel switch are arranged in the overturning push rod of the truck tailgate. The inductive boss has a certain length L;

[0007] S12: The length L of the inductive boss is within the triggering interval of the travel switch. If the beam assembly is welded to the truck beam exactly horizontally, the inductive boss will trigger and stop running for another 0.5L distance after triggering. In this way, the inductive boss can always stop the travel switch in the middle position, ensuring the horizontality of the tailgate plate.

[0008] S13: If the beam assembly is welded to the truck beam at an angle, the inductive boss will stop at the middle position of the travel switch, and the tailgate plate will also tilt at the same angle. Adjust the fine adjustment knob. Each rotation of the fine adjustment knob by 1 degree can control the extension and retraction of the overturning push rod by 0.05L, and simultaneously move the inductive boss by 0.05L.

[0009] S14: Continue to adjust the fine-tuning knob until the tailgate plate is visually level with the truck bed floor, at which point the flipper rod extension length is: 0.05L * the scale on the fine-tuning knob, at which point the tailgate plate is level with the truck bed floor.

[0010] Further, in S11, the two ends of the sensing boss are provided with guide slopes, and the travel switch realizes signal feedback or feedback interruption with the sensing boss after passing through the guide slopes.

[0011] Further, the automobile tailgate comprises a girder assembly, a lifting push rod is connected to the girder assembly, one end of the lifting push rod is connected to a fixed-length rod assembly, one end of the fixed-length rod assembly is connected to a tailgate plate, and the other end extends to be connected to the girder assembly, a flipper rod is connected to the lower part of the outer side of the lifting push rod, and one end of the flipper rod is connected to the tailgate plate.

[0012] Further, one end of the lifting push rod is hinged to the girder assembly through a first pin shaft, and the other end is hinged to the fixed-length rod assembly through a fourth pin shaft, and the lifting and lowering of the tailgate plate are realized by lengthening or shortening the lifting push rod.

[0013] Further, one end of the flipper rod is hinged to the girder assembly through a second pin shaft, and the other end is hinged to the tailgate plate through a fifth pin shaft, and the opening and closing of the tailgate plate and the actions of lowering and raising the head are realized by lengthening or shortening the flipper rod.

[0014] Further, the fixed-length rod assembly is hinged to the girder assembly through a third pin shaft, hinged to the tailgate plate through a sixth pin shaft, and hinged to the lifting push rod through a fourth pin shaft, and a link plate is arranged on one side of the fixed-length rod assembly, which realizes the planar connection of the tailgate plate and the truck bed floor.

[0015] Further, the flipper rod comprises an outer tube, a threaded rod is arranged in the outer tube, a telescopic tube is nested on the upper part of the threaded rod, the telescopic tube extends to the outside of the outer tube, an extension limit contact is arranged on the upper side of the inner wall of the outer tube, a contraction limit contact is arranged on the bottom side of the inner wall of the outer tube, a travel switch is arranged on one side of the outer wall of the telescopic tube, and the travel switch, the extension limit contact, and the contraction limit contact are connected to the vehicle-mounted system to realize the extension and contraction limiting of the flipper rod.

[0016] Further, in S12, the motor is forward when the flipper rod is lengthened, and the motor is reversed when the flipper rod is shortened, and if the girder assembly is welded to the automobile girder and is exactly horizontal, the system controls the motor to run for 0.5L after triggering, regardless of forward or reverse rotation, so that the sensing boss can be centered and stopped at the position of the travel switch each time.

[0017] Further, in S13, the fine adjustment knob is rotated clockwise by 1 scale each time, which can control the extension of the turnover push rod by 0.05L, and simultaneously drive the sensing boss to move rightward by 0.05L, and the reverse rotation result is opposite, when the tail plate needs to be upwardly adjusted due to downward inclination, only the fine adjustment knob needs to be rotated clockwise until the tail plate is leveled.

[0018] Further, in S14, if the sensing boss of the turnover push rod moves rightward by a distance a during the adjustment process, the tail plate surface reaches the horizontal state, the vehicle-mounted system can determine the distance a according to the position of the fine adjustment knob, and in the future, the motor is operated forwardly to the touch stroke switch, and then is operated by 0.5L+a distance, and then is stopped, and the motor is operated reversely to the touch stroke switch, and then is operated by 0.5L-a distance, and then is stopped.

[0019] Compared with the prior art ， The automobile tail plate electric leveling method provided by the application has the following beneficial effects:

[0020] 1. The position of the sensing boss in the turnover push rod is controlled by rotating the fine adjustment knob, so that the extension length of the turnover push rod is adjusted, the horizontal degree of the tail plate surface is adjusted, and the tail plate surface is kept horizontal with the vehicle compartment floor, when the girder assembly is welded on the automobile girder and is inclined, the tail plate surface will be inclined by the same angle when the sensing boss is stopped at the position of the stroke switch, at this time, the fine adjustment knob is adjusted, the fine adjustment knob is rotated by 1 scale each time, which can control the extension and retraction of the turnover push rod by 0.05L, and simultaneously drive the sensing boss to move by 0.05L, the fine adjustment knob is continuously adjusted until the tail plate surface is kept horizontal with the vehicle compartment floor, and the vehicle-mounted system will record the data, in the future, the motor is operated forwardly to the touch stroke switch, and then is operated by an equal distance, and then is stopped, so that the tail plate surface is kept horizontal with the vehicle compartment floor.

[0021] 2. The electric lifting push rod and the turnover push rod are arranged, the motor drives the screw pair to rotate through the speed reduction mechanism, and the screw pair converts the rotary motion into the linear motion of the electric equipment, so that the problems of the hydraulic system, such as being difficult to maintain, running, bleeding, leakage, and low-temperature oil freezing, are avoided, and the transmission efficiency of the electric push rod is higher. DETAILED DESCRIPTION

[0022] Figure 1 The flow chart of the automobile tail plate electric leveling method is provided.

[0023] Figure 2 The structure diagram of the automobile tail plate in the automobile tail plate electric leveling method is provided.

[0024] Figure 3 The structure diagram of the turnover push rod of the automobile tail plate in the automobile tail plate electric leveling method is provided.

[0025] Figure 4 For Figure 3 Structure amplification schematic diagram of A area in the middle;

[0026] Figure 5 Structure schematic diagram of travel switch in the method of electrically leveling automobile tailgate proposed by the application;

[0027] Figure 6 Connection schematic diagram of induction boss and guide slope in the method of electrically leveling automobile tailgate proposed by the application;

[0028] Figure 7 Electrically leveling principle diagram of travel switch and induction boss in the method of electrically leveling automobile tailgate proposed by the application;

[0029] Figure 8 Structure schematic diagram of fine adjustment knob in the method of electrically leveling automobile tailgate proposed by the application.

[0030] In the figure: 01-beam assembly, 02-fixed length rod assembly, 03-lifting push rod, 04-flip push rod, 05-linking plate, 06-tailgate plate, 07-automobile beam, 08-carriage bottom plate;

[0031] 11-first pin shaft, 12-second pin shaft, 13-third pin shaft, 14-fourth pin shaft, 15-fifth pin shaft, 16-sixth pin shaft;

[0032] 20-outer tube, 21-telescopic tube, 22-contracting limit contact, 23-extending limit contact, 24-travel switch, 25-induction boss, 26-guide slope, 27-threaded rod, 28-fine adjustment knob, 29-scale. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the application more clear and understandable, the application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the application, and are not used to limit the application.

[0034] The implementation of the application is described in detail below in combination with specific examples.

[0035] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Referring to Figures 1-8 The method for electrically leveling the automobile tailgate, specifically comprising the following steps:

[0037] S11: A sensing boss 25 is arranged in the turnover push rod 04, and a guide slope 26 is arranged at both ends of the sensing boss 25; the travel switch 24 realizes signal feedback or feedback interruption with the sensing boss 25 after passing through the guide slope 26; the sensing boss 25 has a certain length L; when the middle position of the sensing boss 25 runs to the position of the travel switch 24, the tailgate plate surface 06 is parallel to the upper and lower planes of the girder assembly 01 at this time;

[0038] S12: The entire length L interval of the sensing boss 25 is the triggering interval of the travel switch; when the turnover push rod 04 is elongated, the motor is forward transmission, and when it is shortened, the motor is reverse rotation; if the girder assembly 01 is welded on the automobile girder 07 just horizontally, then the system control 25 stops after running a distance of 0.5L after triggering regardless of whether the motor is forward or reverse rotation, so that the sensing boss 25 can be stopped in the middle position of the travel switch 24 each time, ensuring that the tailgate plate surface 06 is horizontal;

[0039] S13: If the girder assembly 01 is welded on the automobile girder 07 and appears to be inclined, the tailgate plate surface 06 will also appear to be inclined at the same angle when the sensing boss 25 is stopped in the middle position of the travel switch 24; adjusting the micro-adjusting knob 28 every 1 scale 29 clockwise can control the turnover push rod 04 to elongate 0.05L, and at the same time drive the sensing boss 25 to move 0.05L to the right, and the reverse rotation result is opposite; when the tailgate plate surface 06 needs to be adjusted upward downward, only the micro-adjusting knob 28 needs to be rotated clockwise until it is horizontal (or through other testing means);

[0040] S14: assuming that the induction boss 25 moves to the right distance "a" after the tailgate plate 06 reaches the horizontal, because the angle of rotation of the fine adjustment knob always corresponds to the movement distance of the induction boss 25, the vehicle-mounted system can determine the distance "a" through the position of the fine adjustment knob, and then each time the motor runs forward to the touch stroke switch 24, it stops after running 0.5L+a distance, and the motor runs in reverse to the touch stroke switch 24, and then stops after running 0.5L-a distance.

[0041] In the embodiment, the automobile tailgate includes a girder assembly 01, a lifting push rod 03 connected to the girder assembly 01, one end of the lifting push rod 03 connected to a fixed length rod assembly 02, one end of the fixed length rod assembly 02 connected to a tailgate plate 06, and the other end extending to be connected to the girder assembly 01, and a turnover push rod 04 connected to the lower part of the outer side of the lifting push rod 03, one end of the turnover push rod 04 connected to the tailgate plate 06;

[0042] By setting the electric lifting push rod 03 and the electric turnover push rod 04, using the electric motor to drive the screw pair to rotate through the speed reduction mechanism, and converting the rotary motion into linear motion through the screw pair, the problem of not easy to maintain, running, bleeding, dripping, leakage, and low temperature oil freezing of the hydraulic system is avoided, and the transmission efficiency of the electric push rod is higher.

[0043] In the embodiment, one end of the lifting push rod 03 is hinged to the girder assembly 01 through the first pin shaft 11, the other end is hinged to the fixed length rod assembly 02 through the fourth pin shaft 14, the lifting push rod 03 is lengthened or shortened to realize the lifting action of the tailgate plate 06, one end of the turnover push rod 04 is hinged to the girder assembly 01 through the second pin shaft 12, the other end is hinged to the tailgate plate 06 through the fifth pin shaft 15, the turnover push rod 04 is lengthened or shortened to realize the opening and closing door action and the action of lowering and raising the head of the tailgate plate 06, the fixed length rod assembly 02 is hinged to the girder assembly 01 through the third pin shaft 13, hinged to the tailgate plate 06 through the sixth pin shaft 16, and hinged to the lifting push rod 03 through the fourth pin shaft 14, the fixed length rod assembly 02 is provided with a connecting plate 05 on one side of the sixth pin shaft 16, and the connecting plate 05 realizes the plane connection when the tailgate plate 06 is flush with the vehicle compartment floor 08.

[0044] In the embodiment, the turnover push rod 04 comprises an outer tube 20, a threaded rod 27 is arranged in the outer tube 20, the lower part of the threaded rod 27 is provided with a meshing gear, one side of the meshing gear is provided with a worm, the worm is connected with an external electric power device, i.e. a motor device, the threaded rod 27 is driven to rotate by the motor, the upper part of the threaded rod 27 is nested with an extension tube 21, the extension tube 21 extends to the outside of the outer tube 20, the upper side of the inner wall of the outer tube 20 is provided with an extension limiting contact 23, the bottom side of the inner wall of the outer tube 20 is provided with a contraction limiting contact 22, a travel switch 24 is arranged on the outer wall of one side of the extension tube 21, the travel switch 24, the extension limiting contact 23 and the contraction limiting contact 22 are connected with a vehicle-mounted system, so that the extension and contraction of the turnover push rod 04 are limited, the turnover push rod 04 is protected, and the internal damage of the turnover push rod 04 caused by idling after over-limiting is avoided.

[0045] The position of the sensing boss 25 in the turnover push rod 04 is controlled by rotating the fine adjustment knob 28, so that the extension length of the turnover push rod 04 is adjusted, the levelness of the tail plate surface 06 is adjusted, and the tail plate surface 06 is kept horizontal with the vehicle compartment floor 08,

[0046] When the horizontal adjustment is performed, the specific mode is as follows: when the girder assembly 01 is welded on the automobile girder 07 and appears to be inclined, the tail plate surface 06 will appear to be inclined by the same angle when the middle of the sensing boss 25 stops at the position of the travel switch 24, at this time, the fine adjustment knob 28 is adjusted, the turnover push rod 04 is controlled to extend or contract by 0.05L when the fine adjustment knob 28 is rotated by 1 scale, the sensing boss 25 is driven to move by 0.05L at the same time, the fine adjustment knob 28 is continuously adjusted until the tail plate surface 06 is kept horizontal with the vehicle compartment floor 08 is observed, and the vehicle-mounted system records the receipt, in the future, the motor is operated to run an equal distance after running to the travel switch 24 and then stopping, so that the tail plate surface 06 and the vehicle compartment floor 08 are kept in the horizontal state, when the turnover push rod 04 is extended, the tail plate surface 06 is driven to rotate counterclockwise around the axis of the sixth pin shaft 16, when the turnover push rod 04 is shortened, the tail plate surface 06 is driven to rotate clockwise around the axis of the sixth pin shaft 16, so that the tail plate surface 06 can be stopped after reaching the horizontal state no matter whether the tail plate surface 06 rotates clockwise to open the door or rotates counterclockwise to lift the tail plate.

[0047] In the embodiment, the whole operation process can be controlled by a computer, plus PLC and the like, automatic operation control is realized, in each operation link, a sensor can be arranged to feedback a signal, the steps are sequentially performed, these are all conventional knowledge of automatic control, which will not be described one by one in the embodiment.

[0048] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for electrically leveling a car tailgate, characterized in that, Specifically, the steps include the following: S11: An induction boss and a limit switch are provided inside the flip push rod of the car tailgate, and the induction boss has a certain length L; S12: The length L range of the sensing boss is the trigger range of the limit switch. If the beam assembly is welded to the car beam and is exactly horizontal, the sensing boss will run a distance of 0.5L after being triggered and then stop. In this way, the sensing boss can make the limit switch stop in the middle position every time, ensuring that the tail plate surface is horizontal. S13: If the beam assembly is welded to the car beam and tilts, when the center of the sensing boss stops at the limit switch position, the tailgate will tilt at the same angle. Adjust the fine adjustment knob. Each rotation of the fine adjustment knob by 1 scale can control the extension and retraction of the flip push rod by 0.05L, and at the same time drive the sensing boss to move by 0.05L. S14: Continuously adjust the fine-tuning knob until the tailgate surface is visually level with the floor of the carriage. At this time, the extension length of the flip push rod is 0.05L * the scale on the fine-tuning knob. The tailgate surface is now level with the floor of the carriage.

2. The method for electrically leveling a car tailgate as described in claim 1, characterized in that, In S11, the two ends of the sensing boss are provided with guide ramps, and the limit switch realizes signal feedback or feedback interruption with the sensing boss after passing through the guide ramps.

3. The method for electrically leveling a car tailgate as described in claim 2, characterized in that, The vehicle tailgate includes a frame assembly, on which a lifting push rod is connected. One end of the lifting push rod is connected to a length-fixed rod assembly, one end of which is connected to the tailgate surface, and the other end extends to connect with the frame assembly. A tilting push rod is connected to the lower outer part of the frame assembly located on the lifting push rod, and one end of the tilting push rod is connected to the tailgate surface.

4. The method for electrically leveling a car tailgate as described in claim 3, characterized in that, One end of the lifting push rod is hinged to the main beam assembly via a first pin, and the other end is hinged to the fixed-length rod assembly via a fourth pin. The lifting action of the tail plate is realized by extending or shortening the lifting push rod.

5. The method for electrically leveling a car tailgate as described in claim 4, characterized in that, One end of the flip push rod is hinged to the main beam assembly via the second pin, and the other end is hinged to the tail plate surface via the fifth pin. The opening and closing of the tail plate surface and the head-down and head-up actions are realized by extending or shortening the flip push rod.

6. The method for electrically leveling a car tailgate as described in claim 5, characterized in that, The fixed-length rod assembly is hinged to the main beam assembly via the third pin, hinged to the tail plate surface via the sixth pin, and hinged to the lifting push rod via the fourth pin. A connecting plate is provided on one side of the fixed-length rod assembly at the sixth pin, and the connecting plate realizes a planar connection when the tail plate surface is flush with the car floor.

7. The method for electrically leveling a vehicle tailgate as described in claim 6, characterized in that, The flip push rod includes an outer tube with a threaded rod inside. A telescopic tube is nested at the upper part of the threaded rod, extending to the outside of the outer tube. An extension limit contact is provided on the upper side of the inner wall of the outer tube, and a retraction limit contact is provided on the bottom side of the inner wall of the outer tube. A limit switch is provided on one side of the outer wall of the telescopic tube. The limit switch, extension limit contact, and retraction limit contact are all connected to the vehicle system to realize the extension and retraction limit of the flip push rod.

8. The method for electrically leveling a car tailgate as described in claim 7, characterized in that, In S12, the motor rotates forward when the flip push rod extends and reverses when it retracts. If the beam assembly is welded to the car beam and is exactly horizontal, the system control will run a distance of 0.5L after triggering, regardless of whether the motor rotates forward or reverse. In this way, the sensing boss can stop at the limit switch position in the middle every time.

9. The method for electrically leveling a car tailgate as described in claim 8, characterized in that, In S13, each clockwise rotation of the fine-tuning knob controls the extension of the flip push rod by 0.05L, and simultaneously moves the sensing boss to the right by 0.05L. The result is the opposite when rotating counterclockwise. When the tail plate is tilted downwards and needs to be finely adjusted upwards, simply rotate the fine-tuning knob clockwise until it is visually level.

10. The method for electrically leveling a vehicle tailgate as described in claim 9, characterized in that, In S14, if the flip push rod moves the sensing boss a distance to the right by a distance during the adjustment process, and the tailboard surface reaches the horizontal, the vehicle system can determine the distance a by the position of the fine adjustment knob. After that, each time the motor rotates forward until the limit switch is triggered, it will run for another 0.5L+a distance and then stop. When the motor rotates in reverse until the limit switch is triggered, it will run for another 0.5La distance and then stop.

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