Automatic hook for tail door of carriage and using method of automatic hook

Abstract

The invention provides an automatic hook for a carriage tail door and a using method of the automatic hook, and belongs to the technical field of vehicle accessories, the automatic hook comprises a spring hook assembly and an occlusion seat assembly, the spring hook assembly is fixed on the carriage tail door, the occlusion seat assembly is fixed on the side wall of a carriage body, and the position of the occlusion seat assembly corresponds to that of the spring hook assembly; the spring hook assembly comprises a spring hook seat and a spring hook, the front end of the spring hook is bent downwards to form a hook-shaped structure, the tail end of the spring hook is rotatably connected with the spring hook seat, the occlusion seat assembly comprises an occlusion hook and an unhooking plate, the occlusion hook is formed by bending a flat plate, the front end of the flat plate is bent upwards to form a hook-shaped structure, and the unhooking plate is rotatably connected with the occlusion hook. The unhooking plate is hinged to the upper surface of the flat plate. Automatic locking and releasing during opening and closing of the carriage tail door can be achieved, the operation efficiency is improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention belongs to the field of vehicle parts technology, and in particular relates to an automatic hook for the tailgate of a van and its usage method. Background Technology

[0002] The tailgate of a van typically uses a swing-open design and needs to be secured after opening to prevent swaying due to wind or vibration. Currently, wind hooks are commonly used for securing the tailgate. These hooks consist of a hook body and a base. When in use, the hook body needs to be manually hooked into the base to lock, and the hook needs to be manually released when closing the tailgate.

[0003] This type of fixing method requires the hook to be inserted into the seat every time the tailgate of the van is opened, and the hook must be removed from the seat when closing the tailgate. The operation is cumbersome and inefficient, especially when loading and unloading goods multiple times. At the same time, it is easy to forget to operate the method, resulting in the tailgate not being locked, which poses a safety hazard, especially in bad weather or emergency situations. Summary of the Invention

[0004] To address the deficiencies or shortcomings of existing technologies, this invention provides an automatic hook for the tailgate of a van and its usage method, which can automatically lock and release the tailgate when it is opened and closed, thereby improving operational efficiency and reducing safety hazards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, embodiments of the present invention provide an automatic hook for the tailgate of a van and a method of using the same, comprising a spring hook assembly and a locking seat assembly, wherein the spring hook assembly is fixed to the tailgate of the van, and the locking seat assembly is fixed to the side wall of the van body, and the position of the locking seat assembly corresponds to that of the spring hook assembly. The spring hook assembly includes a spring hook seat and a spring hook. The front end of the spring hook is bent downward to form a hook-shaped structure. The tail end of the spring hook is rotatably connected to the spring hook seat. The engagement seat assembly includes an engagement hook and a disengagement plate. The engagement hook is formed by bending a flat plate. The front end of the flat plate is bent upward to form a hook-shaped structure. The disengagement plate is hinged to the upper surface of the flat plate.

[0006] Furthermore, the spring hook seat is a U-shaped plate structure, the spring hook seat includes a base plate and side plates located on both sides of the base plate, the spring hook includes a middle plate, the front end of the middle plate is bent downward to form a hook-shaped structure, the tail end of the spring hook is provided with a first pin sleeve, and pin holes are symmetrically opened on both side plates of the spring hook seat.

[0007] Furthermore, a first pin is provided inside the first pin sleeve, and both ends of the first pin are fixedly connected to the pin holes.

[0008] Further, symmetrical spring hook holes are formed on the side plates of the spring hook seat, and hook cantilevers are arranged on the two sides of the middle plate, and a tension spring is connected between the spring hook hole and the hook cantilever.

[0009] Further, a limiting pin shaft is further connected between the two side plates of the spring hook seat, and the limiting pin shaft is fixedly connected with limiting holes symmetrically formed on the two side plates.

[0010] Further, the tail end of the flat plate is bent upwards to form a vertical plate, the vertical plate is arranged perpendicularly to the flat plate, two long circular holes are formed side by side on the vertical plate, and the flat plate is fixed to the compartment body through bolts.

[0011] Further, a second pin shaft sleeve is arranged on the upper surface of the flat plate, two hinge bushings are symmetrically arranged at the bottom end of the unhooking plate, the distance between the two hinge bushings is equal to the length of the second pin shaft sleeve, and the second pin shaft sleeve is rotatably connected with the two hinge bushings through a second pin shaft.

[0012] Further, the length of the unhooking plate is greater than the distance from the hinge point to the front end of the flat plate.

[0013] Further, a limiting block is further arranged on the upper surface of the flat plate, and the limiting block is located between the side plate and the second pin shaft sleeve.

[0014] In a second aspect, the embodiments of the present application further provide a use method of the automatic hook for a compartment vehicle tail door, which utilizes the automatic hook for a compartment vehicle tail door as described above, and comprises the following steps: When the compartment vehicle tail door is opened, the spring hook is rotated to a horizontal position, the spring hook moves with the tail door until the front end of the spring hook contacts the front end of the engagement hook, because the front end of the spring hook and the front end of the engagement hook are both hook-shaped structures, the front end of the spring hook slides upwards along the outer wall of the front end of the engagement hook, and at the same time, the unhooking plate is rotated backwards, and as the door opening movement continues, when the bottom of the front end of the spring hook passes the top of the front end of the engagement hook, the front end of the spring hook and the front end of the engagement hook are hooked with each other, and are stably locked under the action of the tension spring, at this time, the tail door is fixed and cannot swing forwards and backwards; When it is needed to close the tail door, the tail door is first pushed to one side of the compartment vehicle side wall, so that the front end of the spring hook and the front end of the engagement hook are separated from each other, the tail door is continuously pushed until the front end of the spring hook contacts the unhooking plate again and moves upwards along the outer wall of the unhooking plate, when the front end of the spring hook exceeds the top of the unhooking plate, the unhooking plate is hooked downwards under the action of the tension spring, and then a door closing action is performed in the reverse direction to push the tail door, the spring hook drives the unhooking plate to rotate towards the front end of the engagement hook until the unhooking plate covers the front end of the engagement hook, the spring hook continues to slide along the outer wall of the unhooking plate, and finally separates from the engagement seat assembly to complete unhooking. After unhooking, the spring hook is manually pulled upwards to exceed a set angle, and the spring hook automatically recovers to a vertical state under the action of the tension spring, and is attached to the tail door without affecting the door closing.

[0015] Compared with the prior art, the present application has the beneficial effects that: 1、The present application fixes the spring hook assembly on the tail door of the van, and fixes the engagement seat assembly on the side wall of the van body, when the tail door is opened, the spring hook on the spring hook assembly will automatically hook the engagement hook on the engagement seat assembly, realizing the fixation of the tail door, when the tail door is closed, the automatic disengagement between the spring hook and the engagement hook can be realized through the disengagement plate on the engagement seat assembly, so that the automatic locking and releasing during the opening and closing of the tail door of the van is realized, the work efficiency is improved, and the safety hidden danger caused by forgetting to lock the tail door is reduced.

[0016] 2、The present application connects the spring hook seat on both sides of the spring hook through the tension spring, under the action of the tension spring tension, the limiting pin shaft arranged on the spring hook seat is used to make the spring hook move to the horizontal state and keep, facilitating the engagement of the spring hook and the engagement hook, and when the spring hook rotates upwards more than 45 degrees, under the action of the tension spring tension, the spring hook automatically moves upwards to the vertical state, so as to fit the tail door, and does not affect the door closing. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a position relation diagram of the spring hook assembly and the engagement seat assembly in the first embodiment of the present application; Figure 2 It is a structure schematic diagram of the spring hook assembly in the first embodiment of the present application; Figure 3 It is an explosion view of the spring hook assembly structure in the first embodiment of the present application; Figure 4 It is a structure schematic diagram of the engagement seat assembly in the first embodiment of the present application; Figure 5 It is an explosion view of the engagement seat assembly structure in the first embodiment of the present application; Figure 6 It is a state diagram of the engagement of the spring hook assembly and the engagement seat assembly in the first embodiment of the present application; Figure 7 It is Figure 6 It is an enlarged view of A in the second embodiment of the present application; Figure 8 It is a connection state change diagram of the spring hook assembly and the engagement seat assembly when the tail door of the van is opened in the second embodiment of the present application; Figure 9 It is a connection state change diagram of the spring hook assembly and the engagement seat assembly when the tail door of the van is closed in the second embodiment of the present application; Wherein, 1, spring hook assembly; 110, spring hook seat; 111, bottom plate; 112, side plate; 113, pin shaft hole; 114, spring hook hole; 115, limiting hole; 120, spring hook; 121, middle plate; 122, first pin shaft sleeve; 123, hook cantilever; 130, tension spring; 140, first pin shaft; 150, limiting pin shaft; 2, engagement seat assembly; 210, engagement hook; 211, flat plate; 212, vertical plate; 213, second pin shaft sleeve; 214, limiting block; 220, unhooking plate; 221, hinged bushing; 230, second pin shaft; 3, tail door; 4, van side wall. DETAILED DESCRIPTION

[0018] The application is further described below in conjunction with the drawings and examples.

[0019] Example 1 A typical embodiment of the application is shown in the drawings as follows. Figure 1 An automatic hook for van tail door, comprising a spring hook assembly 1 and an engagement seat assembly 2, wherein the spring hook assembly 1 is fixed on the van tail door 3 by bolts and moves with the tail door 3, and the engagement seat assembly 2 is fixed on the van side wall 4 by bolts, the position of the engagement seat assembly 2 corresponds to the spring hook assembly 1, ensuring that the tail door 3 can be engaged when it is opened to the limit, thereby locking the tail door 3.

[0020] As shown in the drawings, Figure 2 The spring hook assembly 1 comprises a spring hook seat 110, a spring hook 120 and a tension spring 130, wherein the spring hook seat 110 is a U-shaped plate structure, the spring hook seat 110 comprises a bottom plate 111 and side plates 112 on both sides of the bottom plate 111, and a plurality of bolt fixing holes are formed on the bottom plate 111 for connecting with the tail door 3.

[0021] As shown in the drawings, Figure 3 The spring hook 120 comprises a middle plate 121, the width of the middle plate 121 is less than the distance between the two side plates 112, the front end of the middle plate 121 is bent downward to form a hook structure, the tail end of the spring hook 120 is provided with a first pin shaft sleeve 122, the axis of the first pin shaft sleeve 122 is parallel to the tail end face of the middle plate 121, the tail end of the spring hook 120 is welded and fixed with the outer wall of the first pin shaft sleeve 122, and the length of the first pin shaft sleeve 122 is the same as the width of the middle plate 121.

[0022] The spring hook base 110 is symmetrically provided with pin shaft holes 113 on the two side plates 112. In assembly, the first pin shaft sleeve 122 is placed between the two side plates 112, the first pin shaft 140 is respectively inserted into the pin shaft holes 113 and the first pin shaft sleeve 122, and the end of the first pin shaft 140 is fixed by a snap spring, so that the spring hook 120 can rotate around the first pin shaft 140.

[0023] The spring hook base 110 is symmetrically provided with spring hook holes 114 on the two side plates 112, and the spring hook base 110 is provided with hook cantilevers 123 on the two sides of the middle plate 121. The spring hook holes 114 and the hook cantilevers 123 are connected by the tension spring 130, one end of the tension spring 130 is hooked on the hook cantilever 123 of the spring hook 120, and the other end is hooked on the spring hook hole 114 of the two side plates 112 of the spring hook base 110.

[0024] The spring hook base 110 is further provided with a limiting pin shaft 150 between the two side plates 112. The limiting pin shaft 150 is respectively inserted into the limiting holes 115 symmetrically provided on the two side plates 112, and is fixed by a snap spring. The limiting pin shaft 150 is below the first pin shaft 140, and the rotation range of the spring hook 120 is limited by the limiting pin shaft 150.

[0025] When the spring hook 120 rotates downward to the horizontal state, the lower surface of the spring hook 120 is in contact with the limiting pin shaft 150, and is blocked by the limiting pin shaft 150, so that the spring hook 120 can only move to the horizontal state. When the spring hook 120 rotates upward more than 45 degrees, the spring hook 120 automatically moves upward to the vertical state under the action of the tension spring 130. The spring hook 120 is always subjected to the tension of the tension spring 130 in the movement process, and tends to overturn to both sides.

[0026] As shown in FIGS. Figure 4 and Figure 5 The engagement seat assembly 2 includes an engagement hook 210 and an unhooking plate 220. The engagement hook 210 is bent from a flat plate 211. The front end of the flat plate 211 is bent upward to form a hook structure, and the tail end of the flat plate 211 is bent upward to form a vertical plate 212. The vertical plate 212 is perpendicular to the flat plate 211. Two long circular holes are provided side by side on the vertical plate 212, and are used to be fixed to the side wall 4 of the compartment body by bolts. When fixed, the position can be adjusted to correspond to the spring hook assembly 1.

[0027] A second pin shaft sleeve 213 is arranged on the upper surface of the flat plate 211. The axis of the second pin shaft sleeve 213 is parallel to the flat plate 211 and the vertical plate 212. The length of the second pin shaft sleeve 213 is less than the width of the flat plate 211.

[0028] The unhooking plate 220 is a straight plate, the width of the unhooking plate 220 is the same as the width of the flat plate 211, the length of the unhooking plate 220 is greater than the distance between the second pin shaft sleeve 213 and the front end surface of the engagement hook 210, the bottom end of the unhooking plate 220 is symmetrically provided with two hinged bushings 221, the axes of the two hinged bushings 221 coincide, the distance between the two hinged bushings 221 is equal to the length of the second pin shaft sleeve 213, when assembled, the second pin shaft sleeve 213 is placed between the two hinged bushings 221, the shaft holes at both ends of the second pin shaft sleeve 213 are aligned with the shaft holes of the two hinged bushings 221 on the sides, one end of the second pin shaft 230 is sequentially inserted into the shaft holes of the hinged bushings 221 and the second pin shaft sleeve 213, and is fixed by a snap spring, so that the unhooking plate 220 can rotate around the second pin shaft 230.

[0029] The upper surface of the flat plate 211 is further provided with a limiting block 214 between the vertical plate 212 and the second pin shaft sleeve 213, which is used for limiting when the unhooking plate 220 rotates backward. When the unhooking plate 220 rotates forward, it covers the hook part at the front end of the engagement hook 210, and when the unhooking plate 220 rotates backward, it abuts against the limiting block 214 to achieve limiting.

[0030] As shown in Figure 6 and Figure 7 , in the initial state, the spring hook 120 is in a horizontal position under the action of the tension spring 130 and the limiting pin shaft 150, when the van tail door 3 is opened, the spring hook 120 moves with the tail door 3 until the front end of the spring hook 120 contacts the front end of the engagement hook 210, because the front end of the spring hook 120 and the front end of the engagement hook 210 are both hook-shaped structures, the front end of the spring hook 120 slides upward along the outer wall of the front end of the engagement hook 210, and at the same time, the spring hook 120 rotates backward against the unhooking plate 220, as the door opening movement continues, when the front end of the spring hook 120 passes over the top of the front end of the engagement hook 210, the front end of the spring hook 120 and the front end of the engagement hook 210 are hooked together, and are stably locked under the action of the tension spring 130, at this time, the tail door 3 is fixed and cannot swing back and forth.

[0031] When it is necessary to close the tail door 3, the tail door 3 is first pushed to one side of the van body side wall 4, so that the front end of the spring hook 120 and the front end of the engagement hook 210 are separated from each other, the tail door 3 is continuously pushed until the front end of the spring hook 120 again contacts the unhooking plate 220 and moves upward along the outer wall of the unhooking plate 220, when the front end of the spring hook 120 passes over the top of the unhooking plate 220, it hooks downward to the unhooking plate 220 under the action of the tension spring 130, and then the door closing action is performed in the opposite direction, the spring hook 120 drives the unhooking plate 220 to rotate toward the front end of the engagement hook 210, until the unhooking plate 220 covers the front end of the engagement hook 210, the spring hook 120 continues to slide along the outer wall of the unhooking plate 220, and finally separates from the engagement seat assembly 2, and the unhooking is completed.

[0032] The spring hook assembly is fixed on the tail door of the van, and the engaging seat assembly is fixed on the side wall of the van body, when the tail door is opened, the spring hook on the spring hook assembly automatically hooks the engaging hook on the engaging seat assembly, the tail door is fixed, when the tail door is closed, the unhooking plate on the engaging seat assembly can realize the automatic disengagement between the spring hook and the engaging hook, so that the automatic locking and releasing of the tail door of the van is realized when the tail door is opened and closed, the operation efficiency is improved, and the safety hidden danger caused by forgetting to lock the tail door is reduced.

[0033] Embodiment two The embodiment provides a use method of the automatic hook for the tail door of the van, and the use method comprises the following steps: When the tail door of the van is opened, as shown in the figure, Figure 8 the spring hook is rotated to the horizontal position, the spring hook moves with the tail door, until the front end of the spring hook contacts the front end of the engaging hook, because the front end of the spring hook and the front end of the engaging hook are both hook-shaped structures, the front end of the spring hook slides upwards along the outer wall of the front end of the engaging hook, and rotates backwards against the unhooking plate, with the door opening movement continuing, when the bottom of the front end of the spring hook passes the top of the front end of the engaging hook, the front end of the spring hook and the front end of the engaging hook are hooked with each other, and are stably locked under the action of the tensile spring, at this time, the tail door is fixed and cannot swing back and forth; When the tail door needs to be closed, as shown in the figure, Figure 9 first, the tail door is pushed to one side of the van body side wall, so that the front end of the spring hook and the front end of the engaging hook are disengaged from each other, the tail door is continuously pushed, until the front end of the spring hook contacts the unhooking plate again and moves upwards along the outer wall of the unhooking plate, when the front end of the spring hook exceeds the top of the unhooking plate, the unhooking plate is hooked downwards under the action of the tensile spring, and then a door closing action is performed, the tail door is pushed in the reverse direction, the unhooking plate is rotated towards the front end of the engaging hook by the spring hook, until the unhooking plate covers the front end of the engaging hook, the spring hook continues to slide along the outer wall of the unhooking plate, and finally the spring hook is disengaged from the engaging seat assembly, and the unhooking is completed; After unhooking, the spring hook is manually pulled upwards by more than 45 degrees, the spring hook automatically recovers to the vertical state under the action of the tensile spring, and is attached to the tail door, without affecting the door closing.

[0034] The above only describes the preferred embodiments of the application and is not used to limit the application, and the application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An automatic hitch for a van tailgate, characterized by The utility model relates to a spring hook assembly and a snap seat assembly, the spring hook assembly is fixed on the tail door of the van, and the snap seat assembly is fixed on the side wall of the van body. The spring hook assembly comprises a spring hook seat and a spring hook, the front end of the spring hook is bent downward to form a hook structure, the tail end of the spring hook is rotationally connected with the spring hook seat, the snap seat assembly comprises a snap hook and a disengaging plate, the snap hook is formed by bending a flat plate, the front end of the flat plate is bent upward to form a hook structure, and the disengaging plate is hingedly connected with the upper surface of the flat plate.

2. An automatic hitch for a van tailgate as claimed in claim 1, wherein, The spring hook seat is a U-shaped plate structure, the spring hook seat comprises a bottom plate and side plates located on both sides of the bottom plate, the spring hook comprises an intermediate plate, the front end of the intermediate plate is bent downward to form a hook structure, the tail end of the spring hook is provided with a first pin shaft sleeve, and pin shaft holes are symmetrically formed in the side plates on both sides of the spring hook seat.

3. An automatic hitch for a tailgate of a van as defined in claim 2, characterized in that The first pin shaft sleeve is provided with a first pin shaft, and the two ends of the first pin shaft are fixedly connected with the pin shaft holes.

4. An automatic hitch for a tailgate of a van as defined in claim 2, characterized in that Spring hook holes are symmetrically formed in the side plates on both sides of the spring hook seat, hook cantilevers are arranged on both sides of the intermediate plate, and a tension spring is connected between the spring hook holes and the hook cantilevers.

5. The automatic hitch for a van tailgate of claim 2, wherein, A limiting pin shaft is further connected between the side plates on both sides of the spring hook seat, and the two ends of the limiting pin shaft are fixedly connected with limiting holes symmetrically formed in the side plates.

6. An automatic hitch for a van tailgate as defined in claim 1, wherein The tail end of the flat plate is bent upward to form a vertical plate, the vertical plate is arranged perpendicularly to the flat plate, two long circular holes are formed side by side in the vertical plate, and the flat plate is fixed to the van body through the long circular holes.

7. The automatic hitch for a van tailgate of claim 1, wherein, A second pin shaft sleeve is arranged on the upper surface of the flat plate, two hinged bushings are symmetrically arranged at the bottom end of the disengaging plate, the distance between the two hinged bushings is equal to the length of the second pin shaft sleeve, and the second pin shaft sleeve is rotationally connected with the two hinged bushings through a second pin shaft.

8. An automatic hitch for a van tailgate as defined in claim 1, wherein The length of the disengaging plate is greater than the distance from the hinge point to the front end of the flat plate.

9. An automatic hitch for a tailgate of a pick-up truck as defined in claim 7, wherein A limiting block is further arranged on the upper surface of the flat plate, and the limiting block is located between the side plates and the second pin shaft sleeve.

10. A method of using an automatic hitch for a van tailgate, using an automatic hitch for a van tailgate according to any one of claims 1-9, characterized in that, The utility model relates to a spring hook assembly and a snap seat assembly, the spring hook assembly is fixed on the tail door of the van, and the snap seat assembly is fixed on the side wall of the van body. When the tail door of the van is opened, the spring hook is rotated to a horizontal position, the spring hook moves with the tail door until the front end of the spring hook contacts the front end of the snap hook, then the front end of the spring hook slides upward along the outer wall of the front end of the snap hook, at the same time, the disengaging plate is rotated backward, and when the bottom of the front end of the spring hook passes the top of the front end of the snap hook, the front end of the spring hook is hooked with the front end of the snap hook, and the spring hook is locked stably under the action of the tension spring. When the tail door needs to be closed, the tail door is pushed to one side of the side wall of the van body first, so that the front end of the spring hook is separated from the front end of the snap hook, the tail door is continuously pushed until the front end of the spring hook contacts the disengaging plate again and moves upward along the outer wall of the disengaging plate, when the front end of the spring hook exceeds the top of the disengaging plate, the disengaging plate is hooked downward under the action of the tension spring, and then the door closing action is performed, the tail door is pushed in the reverse direction, the disengaging plate is rotated toward the front end of the snap hook under the action of the spring hook, until the disengaging plate covers the front end of the snap hook, the spring hook continues to slide along the outer wall of the disengaging plate, and finally the spring hook is separated from the snap seat assembly and the disengaging is completed. After the disengaging, the spring hook is manually pulled upward beyond a set angle, and the spring hook is automatically restored to a vertical state under the action of the tension spring and is attached to the tail door.

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