Automatic locking mechanism for rear door of container

Abstract

The utility model provides a container back door automatic locking mechanism which comprises a tailstock, a support and an opening and closing arm, the tailstock is fixedly arranged on the outer wall of a car hopper, a tail plate is arranged on the side wall of the tailstock in a hinged mode, the support is fixedly connected with a car frame, the support comprises two supporting plates, a connecting shaft is fixedly arranged between the two supporting plates, and a cross beam is horizontally arranged on the car frame. The top end of the opening and closing arm is rotationally connected with one end of a pull rod through a connecting piece, the bottom end of the opening and closing arm abuts against the cross beam, and the other end of the pull rod is movably connected with the side, facing the rear door, of the tail plate through a chain. The problem that in the prior art, when a boxcar is closed after unloading is completed, a connecting rod mechanism and the rear door are not coordinated at a certain stage, and consequently the rear door cannot be completely closed is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self-unloading truck technical field especially relates to a cargo box rear door automatic locking mechanism. BACKGROUND

[0002] In the operation process that the truck lowers the vehicle container in the vehicle container, the rear door of the vehicle container and the connecting rod mechanism need to complete the closing action in coordination. However, in actual operation, the following situations often occur: when the vehicle container starts to descend, the rear door and the connecting rod mechanism start to act at the same time, but at a certain stage in the closing process, there will be a lack of coordination between the rear door and the connecting rod mechanism, resulting in a collision between the two, or the connecting rod mechanism has closed in advance when the rear door has not yet reached the fully closed position. This not only affects the normal closing of the vehicle container, but also causes the rear door to be unable to be completely locked, resulting in the material in the vehicle container spilling during transportation, and in severe cases, the vehicle door will be damaged or the connecting rod mechanism will malfunction, affecting the overall safety and performance of the vehicle. To solve this problem, the operator often needs to manually push the rear door during the descent of the vehicle container to ensure that the rear door can reach and lock in the correct position before the connecting rod mechanism closes. This not only increases the labor intensity of the operator, but also reduces the work efficiency and has certain safety hazards. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a cargo box rear door automatic locking mechanism, which solves the problem of the lack of coordination between the connecting rod mechanism and the rear door at a certain stage when the truck compartment is closed after unloading, which causes the rear door to be unable to be completely closed.

[0004] According to the embodiment of the utility model, a cargo box rear door automatic locking mechanism includes a tail seat, a bracket and an opening and closing arm, the tail seat is fixedly arranged on the outer wall of the vehicle container, a tail plate is hingedly arranged on the side wall of the tail seat, the bracket is fixedly connected with the vehicle frame, the bracket includes two support plates, a connecting shaft is fixedly arranged between the two support plates, a cross beam is horizontally arranged on the vehicle frame, the middle part of the opening and closing arm is rotatably connected with the connecting shaft, the top end of the opening and closing arm is rotatably connected with one end of a pull rod through a connecting piece, the bottom end of the opening and closing arm abuts against the cross beam, and the other end of the pull rod is movably connected with the side of the tail plate facing the rear door through a chain.

[0005] Compared with the prior art, the utility model have following beneficial effect: through adopt setting support on the frame, support rotation setting open and close arm, set up tailstock on the outer wall of the car hopper, make when the car hopper inclines, the tailgate hinged setting on the tailstock pull chain and pull rod drive open and close arm rotation, the tailgate no longer position limiting rear door, and the car hopper dumps goods and inclines to horizontal state in the process, the crossbeam position limiting open and close arm, make open and close arm rotation, thereby let open and close arm pull rod drive chain pull tailgate rotation around its hinged end, thereby make tailgate push rear door completely close, because chain replaces the part of pull rod, play time delay effect, make the cooperation of rear door and tailgate when closing does not appear uncoordinated situation, guarantee that rear door can completely close, avoid that the material in the car hopper spills to outside.

[0006] Further, the open and close arm is L-shaped, the middle part of the open and close arm is rotationally connected with the connecting shaft, one end of the open and close arm is rotationally connected with the pull rod through the connecting piece, and the other end of the open and close arm abuts against the top of the crossbeam on the frame.

[0007] Further, the open and close arm comprises an arc segment and a straight segment, the straight segment is integrally formed with the arc segment, the connecting shaft is rotationally arranged at the connection between the straight segment and the arc segment, the arc segment is curved towards the straight segment, and the bottom of the arc segment abuts against the top of the crossbeam.

[0008] Further, the connecting piece is a concave block, a rotating shaft is rotationally arranged in the groove of the concave block, the top end of the open and close arm is rotationally connected with the rotating shaft, and the side of the concave block, away from the open and close arm, is connected with the pull rod.

[0009] Further, a through hole, through which one end of the pull rod passes, is formed in the side wall of the concave block facing the pull rod, one end of the concave block facing the concave block is provided with a thread, and the pull rod is detachably connected with the concave block through a nut.

[0010] Further, the pull rod is a telescopic rod.

[0011] Further, the side of the tailgate, away from the chain, is provided with a counterweight. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the embodiment of the utility model.

[0013] Figure 2 It is another view whole structure schematic view of the embodiment of the utility model.

[0014] Figure 3 It is a top view of the embodiment of the utility model.

[0015] Figure 4 It is a top view of the embodiment of the utility model on the installation of the truck.

[0016] Figure 5The installation front view of the embodiment of the utility model on the truck.

[0017] In the above-mentioned drawing: 1, tail seat; 2, tail plate; 3, support plate; 4, connecting shaft; 5, opening and closing arm; 6, chain; 501, arc segment; 502, straight line segment; 7, concave block; 8, pull rod; 9, nut; 10, counterweight block; 11, car hopper; 12, vehicle frame; 13, crossbeam; 14, back door. DETAILED DESCRIPTION

[0018] The technical scheme in the utility model is further explained below in connection with the drawings and embodiments.

[0019] As Figure 1The utility model discloses a kind of automatic locking mechanisms of truck rear door, including tailstock 1, support and opening and closing arm 5, tailstock 1 is fixedly arranged on the outer wall of car hopper 11, hingedly equipped with tailgate 2 on the side wall of tailstock 1, support is fixedly connected with vehicle frame 12, support includes two support plates 3, connecting shaft 4 and fixed rod are fixedly equipped between two support plates 3, fixed rod improves the connection strength of two support plates 3, horizontal beam 13 is equipped on vehicle frame 12, the middle part of opening and closing arm 5 is rotatably connected with connecting shaft 4, the top end of opening and closing arm 5 is rotatably connected with one end of pull rod 8 by connecting piece, the bottom end of opening and closing arm 5 is abutted with horizontal beam 13, the other end of pull rod 8 is movably connected with the side of tailgate 2 towards rear door 14 by chain 6.Specifically, vehicle frame 12 is the main body mechanism of truck rear compartment, horizontal beam 13 is a part of vehicle frame 12 structure, car hopper 11 is arranged at the top of vehicle frame 12, car hopper 11 tail portion is equipped with the opening for goods to dump, the top end of rear door 14 is hinged with the top of car hopper 11 tail portion opening, tailstock 1 is arranged at the side outside car hopper, so that tailgate 2 can block rear door 14 from rotating when being vertical, rear door 14 is used to open or close the opening of car hopper 11 tail portion, after rear door 14 is opened, car hopper 11 can be tilted under the drive of relevant driving device to dump the goods in car hopper 11, each component is the conventional structure of self-unloading truck (dump truck), when car hopper 11 is in horizontal state, the horizontal height of the top of tailgate 2 is higher than the horizontal height of the bottom of rear door 14, to reach the effect of limiting the rotation of rear door 14, when working, when car hopper 11 rotates from horizontal state to inclined state to dump goods, tailgate 2 makes it rotate around hinged end under its own weight, when tailgate 2 rotates, it pulls chain 6, the through slot is opened on car hopper 11 for chain 6 to pass through car hopper 11 and be connected to tailgate 2, so that chain 6 pulls pull rod 8 to drive opening and closing arm 5 to rotate, at this time, tailgate 2 no longer limits rear door 14, so that rear door 14 can rotate around its hinged end, so as to let the goods in car hopper 11 dump, after the goods are dumped, car hopper 11 rotates to horizontal state again, in this process, car hopper 11 moves towards the direction of being close to the top of vehicle frame 12, the bottom of opening and closing arm 5 is limited by horizontal beam 13 abutted, so that opening and closing arm 5 rotates, so as to let pull rod 8 pull chain 6, chain 6 replaces a part of pull rod 8, plays a time-delay role, chain 6 pulls tailgate 2 to rotate around its hinged end, so that tailgate 2 pushes rear door 14 to close in place, so as to avoid the problem that rear door 14 cannot be completely closed.

[0020] Further, opening and closing arm 5 is L-shaped, the middle part of opening and closing arm 5 is rotatably connected with connecting shaft 4, one end of opening and closing arm 5 is rotatably connected with pull rod 8 through connecting piece, the other end of opening and closing arm 5 is abutted with the top of horizontal beam 13 on vehicle frame 12.In this embodiment, opening and closing arm 5 is L-shaped, so that when pull rod 8 pulls the top end of opening and closing arm 5 to rotate, the bottom end of opening and closing arm 5 rotates in arc shape, and when the end of opening and closing arm 5 is abutted with the bottom of horizontal beam 13 and rotates, the end of opening and closing arm 5 connected with pull rod 8 pulls pull rod 8 to move.

[0021] Further, the opening and closing arm 5 comprises an arc segment 501 and a straight segment 502, the straight segment 502 is integrally formed with the arc segment 501, the connecting shaft 4 is rotatably arranged at the joint of the straight segment 502 and the arc segment 501, the arc segment 501 is curved towards the straight segment 502, and the bottom of the arc segment 501 abuts against the top of the cross beam 13 of the frame 12. In the embodiment, the opening and closing arm 5 is rotatably arranged between the two supporting plates 3 through the connecting shaft 4, when the hopper 11 is tilted, the self-weight of the tail plate 2 will pull the chain 6 through the pull rod 8, and the pull rod 8 will pull the straight segment 502 of the opening and closing arm 5 to drive the whole opening and closing arm 5 to rotate, when the tilted hopper 11 changes to the horizontal state, the arc segment 501 of the opening and closing arm 5 will be squeezed to rotate while abutting against the cross beam 13 of the frame 12, so that the straight segment 502 of the opening and closing arm 5 pulls the pull rod 8 to displace, and finally pulls the tail plate 2 to limit the rear door 14.

[0022] Further, the connecting piece is a concave block 7, a rotating shaft is rotatably arranged in the groove of the concave block 7, the top end of the opening and closing arm 5 is rotatably connected with the rotating shaft, and the side of the concave block 7 away from the opening and closing arm 5 is connected with the pull rod 8. In the embodiment, the side of the concave block 7 away from the pull rod 8 has a groove, the end of the pull rod 8 away from the chain 6 is connected with the concave block 7, and the concave block 7 is connected with the top end of the opening and closing arm 5 through the rotating shaft in the groove, so that the pull rod 8 can pull the opening and closing arm 5 to rotate or the opening and closing arm 5 can pull the pull rod 8 to displace.

[0023] Further, a through hole is formed in the side wall of the concave block 7 towards the pull rod 8, the end of the pull rod 8 is arranged to pass through the through hole, the end of the pull rod 8 towards the concave block 7 is provided with a thread, and the pull rod 8 is detachably connected with the concave block 7 through the nut 9. When the pull rod 8 is connected with the concave block 7, a nut 9 is screwed on the pull rod 8 in advance, the end of the pull rod 8 with the thread is inserted into the through hole of the concave block 7, and then the pull rod 8 is locked on the concave block 7 through another nut 9.

[0024] Further, the pull rod 8 is a telescopic rod. Specifically, the telescopic structure of the pull rod 8 can be selected from the prior art, and the length of the pull rod 8 is adjusted to prevent the pull rod 8 from being easily out of coordination when the pull rod 8 pulls the chain 6 to drive the tail plate 2 to close and limit the rear door 14.

[0025] Further, the side of the tail plate 2 away from the chain 6 is provided with a counterweight 10. In the embodiment, the counterweight 10 is plate-shaped, and the counterweight 10 is arranged along the length direction of the tail plate 2. The counterweight 10 increases the weight of the tail plate 2 and improves the structural strength of the tail plate 2, so that when the hopper 11 is tilted, the tail plate 2 can pull the chain 6 through the self-weight to drive the pull rod 8 to displace while the pull rod 8 pulls the opening and closing arm 5 to rotate.

[0026] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A mechanism for automatically locking a rear door of a cargo box, characterized by, The utility model relates to a tailstock (1) is fixedly arranged on the outer wall of the car hopper (11), and a tailgate (2) is hingedly arranged on the side wall of the tailstock (1); The support is fixedly connected with the vehicle frame (12), and the support comprises two support plates (3) and a connecting shaft (4) fixedly arranged between the two support plates (3); The opening and closing arm (5) is horizontally provided with a cross beam (13) on the vehicle frame (12), the middle part of the opening and closing arm (5) is rotatably connected with the connecting shaft (4), the top end of the opening and closing arm (5) is rotatably connected with one end of a pull rod (8) through a connecting piece, the bottom end of the opening and closing arm (5) abuts against the cross beam (13), and the other end of the pull rod (8) is movably connected with the side of the tailgate (2) facing the rear door (14) through a chain (6). The opening and closing arm (5) is L-shaped, the middle part of the opening and closing arm (5) is rotatably connected with the connecting shaft (4), one end of the opening and closing arm (5) is rotatably connected with the pull rod (8) through a connecting piece, and the other end of the opening and closing arm (5) abuts against the top of the cross beam (13) on the vehicle frame (12).

2. The automatic locking mechanism of the rear door of a cargo box according to claim 1, characterized in that: The opening and closing arm (5) comprises an arc-shaped section (501) and a straight section (502), the straight section (502) is integrally formed with the arc-shaped section (501), the connecting shaft (4) is rotatably arranged at the connection between the straight section (502) and the arc-shaped section (501), the arc-shaped section (501) is curved towards the straight section (502), and the bottom of the arc-shaped section (501) abuts against the top of the cross beam (13) of the vehicle frame (12).

3. The automatic locking mechanism of the rear door of a cargo box according to claim 1, characterized in that: The connecting piece is a concave block (7), a rotating shaft is rotatably arranged in the recess of the concave block (7), the top end of the opening and closing arm (5) is rotatably connected with the rotating shaft, and the side, away from the opening and closing arm (5), of the concave block (7) is connected with the pull rod (8).

4. The automatic locking mechanism of the rear door of a cargo box according to claim 1, characterized in that: A through hole, through which one end of the pull rod (8) passes, is formed in the side wall of the concave block (7) facing the pull rod (8), one end of the concave block (7) is provided with a thread, and the pull rod (8) is detachably connected with the concave block (7) through a nut (9).

5. A mechanism for automatically locking a rear door of a cargo box according to claim 4, characterized in that: The pull rod (8) is a telescopic rod.

6. The automatic locking mechanism of the rear door of a cargo box according to claim 1, characterized in that: The tailgate (2) is provided with a counterweight (10) on the side away from the chain (6).

7. The automatic locking mechanism of the rear door of a cargo box according to claim 1, characterized in that: ​

Images