Dumper rear door structure capable of being opened upwards and oppositely

Abstract

The utility model discloses a dumper rear door structure capable of being opened upwards and oppositely, which comprises a rear door main frame, a first oppositely-opened door leaf and a second oppositely-opened door leaf, the first oppositely-opened door leaf and the second oppositely-opened door leaf are arranged on the rear door main frame, and the upper end of the rear door main frame is respectively and correspondingly hinged with a left carriage side plate and a right carriage side plate of a dumper. The sides, away from each other, of the first hinged door leaf and the second hinged door leaf are hinged to the rear door main frame, and the sides, close to each other, of the first hinged door leaf and the second hinged door leaf are locked through a locking device. Wherein the rear door main frame can drive the first side-by-side door leaf and the second side-by-side door leaf to turn upwards and downwards together, so that the rear door of the dumper is opened and closed; the first hinged door leaf and the second hinged door leaf can be opened outwards and closed inwards around the rear door main frame, so that the rear door of the dumper is opened and closed. The utility model has the advantages that the upper opening and the opposite opening can be realized; the strength is high; and when the door is opened oppositely, the door is opened and closed effortlessly and can be operated by a single person on the ground.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self-unloading truck rear door technical field, and specifically relates to a self-unloading truck rear door structure of up opening and opposite opening. BACKGROUND

[0002] In prior art, the general self-unloading truck rear door is up opening door, and can only be opened when the container is lifted, and cannot be opened in non-lifting state. When some goods requiring manual loading and unloading are encountered, the container cannot be opened, which causes certain difficulty in manual loading and unloading. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a self-unloading truck rear door structure of up opening and opposite opening, and solves the technical problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A self-unloading truck rear door structure of up opening and opposite opening comprises a rear door main frame, a first opposite door leaf and a second opposite door leaf installed on the rear door main frame, the upper end of the rear door main frame is respectively hinged to the left and right side plates of the two compartments of the self-unloading truck, and the lower end of the rear door main frame is respectively locked to the left and right side plates of the two compartments of the self-unloading truck, one side of the first opposite door leaf and the second opposite door leaf away from each other is respectively hinged to the rear door main frame, and the side close to each other is locked to each other through a locking device; wherein the rear door main frame can be turned up and turned down with the first opposite door leaf and the second opposite door leaf, so as to open and close the rear door of the self-unloading truck; the first opposite door leaf and the second opposite door leaf can be opened outward and folded inward around the rear door main frame, so as to open and close the rear door of the self-unloading truck.

[0006] Further, the rear door main frame comprises a rear door left vertical frame, a rear door right vertical frame, a rear door upper horizontal frame and a rear door lower horizontal frame, the upper end of the rear door left vertical frame and the rear door right vertical frame is respectively provided with a rear door support rod, and the lower end of the rear door left vertical frame and the rear door right vertical frame is respectively provided with a manual lock hook block pin, the upper end of the rear door left vertical frame and the rear door right vertical frame is respectively hinged to a double seat arranged on the left and right side plates of the two compartments of the self-unloading truck through the rear door support rod, the lower end of the rear door left vertical frame and the rear door right vertical frame is locked to a manual lock hook arranged on the left and right side plates of the two compartments of the self-unloading truck through the manual lock hook block pin, the rear door upper horizontal frame is arranged on the upper part of the side close to the compartment of the self-unloading truck of the rear door left vertical frame and the rear door right vertical frame, and the left and right ends of the rear door upper horizontal frame are respectively detachably connected with the rear door left vertical frame and the rear door right vertical frame, and the rear door lower horizontal frame is arranged on the lower part of the side close to the compartment of the self-unloading truck of the rear door left vertical frame and the rear door right vertical frame, and the left and right ends of the rear door lower horizontal frame are respectively fixedly connected with the rear door left vertical frame and the rear door right vertical frame.

[0007] Further, the left and right ends of the upper horizontal frame of the back door are respectively detachably connected with the left vertical frame of the back door and the right vertical frame of the back door through an active rear connecting seat.

[0008] Further, the active rear connecting seat comprises a first connecting seat and a second connecting seat, the first connecting seat is fixedly connected with the corresponding left vertical frame of the back door or the right vertical frame of the back door, and the second connecting seat is fixedly connected with the upper horizontal frame of the back door, and the first connecting seat and the second connecting seat are connected through bolts.

[0009] Further, the first pair of door leaves comprises a first pair of door leaf frame and a first pair of door plate arranged on the back of the first pair of door leaf frame.

[0010] The second pair of door leaves comprises a second pair of door leaf frame and a second pair of door plate arranged on the back of the second pair of door leaf frame.

[0011] The first pair of door leaf frame and the second pair of door leaf frame are hingedly connected with the back door main frame through a plurality of hinges on the side away from each other, and are locked through a locking device on the side close to each other.

[0012] Further, the first pair of door leaf frame comprises two parallel and opposite first small door vertical frames, two parallel and opposite first small door horizontal frames, and a first small door inclined frame arranged between the two parallel and opposite first small door horizontal frames.

[0013] The second pair of door leaf frame comprises two parallel and opposite second small door vertical frames, two parallel and opposite second small door horizontal frames, and a second small door inclined frame arranged between the two parallel and opposite second small door horizontal frames.

[0014] Further, the first pair of door plate is provided with a first back door clamping strip at the lower end edge close to one side of the dump truck compartment.

[0015] The second pair of door plate is provided with a second back door clamping strip at the lower end edge close to one side of the dump truck compartment.

[0016] Further, the second pair of door plate is provided with a back door middle strip on the side close to the first pair of door plate.

[0017] Further, the locking device comprises a rear door lock rod, a rear door pull rod, a rear pull rod connecting pipe and a rear door pull rod fixing seat, the rear door lock rod is rotatably supported on one side of the first pair of door leaf frame close to the second pair of door leaf frame through a plurality of rear door lock rod fixing piles, one end of the rear door pull rod is fixedly connected with the rear door lock rod through the rear door pull rod connecting pipe, the other end is locked with the rear door pull rod fixing seat, the rear door pull rod fixing seat is fixed on the first pair of door plate, and the upper and lower ends of the rear door lock rod are respectively provided with a small lock hook, the small lock hook located at the upper end of the rear door lock rod is locked and matched with the rear door fixing pin arranged on the second pair of door leaf frame, and the small lock hook located at the lower end of the rear door lock rod is locked and matched with the rear door fixing pin arranged on the rear door main frame.

[0018] Further, the lower end of the second pair of door leaf frame is further provided with an insurance device, the insurance device comprises an insurance bolt, an insurance bolt shaft pipe, an insurance bolt seat and an insurance bolt handle, one end of the insurance bolt is connected with the insurance bolt handle, the other end is inserted and matched with the insurance bolt seat through the insurance bolt shaft pipe, the insurance bolt shaft pipe is fixedly arranged on the second pair of door leaf frame, and the insurance bolt seat is fixed on the rear door main frame.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] (1) can be opened in the lifting and non-lifting states, that is, in the lifting state, can be opened upward, and in the non-lifting state, can be opened, and meet the needs of some manual loading and unloading conditions;

[0021] (2) high strength;

[0022] (3) in the non-lifting state, labor-saving when opening and closing the door, and a single person can operate on the ground without climbing the carriage;

[0023] (4) in the non-lifting state, when loading and unloading the super-high goods through the opposite opening door, the rear door upper horizontal frame can be removed for loading and unloading. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the following described drawings are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0025] Figure 1 It is the rear door structure of the self-unloading vehicle provided by the utility model embodiment that can be opened upward and opened oppositely, and is the isometric schematic view of one perspective when the rear door structure is in the closed state;

[0026] Figure 2is the axial view of another perspective of the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely when the rear door structure is in the closed state, provided by the embodiment of the utility model;

[0027] Figure 3 is the front view of the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely when the rear door structure is in the closed state, provided by the embodiment of the utility model;

[0028] Figure 4 is Figure 3 is the A-A section view in the utility model;

[0029] Figure 5 is Figure 4 is the enlarged view of M in the utility model;

[0030] Figure 6 is the axial view of one perspective of the rear door main frame;

[0031] Figure 7 is the axial view of another perspective of the rear door main frame;

[0032] Figure 8 is the axial view of one perspective of the first opposite door leaf and the second opposite door leaf when the first opposite door leaf and the second opposite door leaf are in the closed state;

[0033] Figure 9 is the axial view of another perspective of the first opposite door leaf and the second opposite door leaf when the first opposite door leaf and the second opposite door leaf are in the closed state;

[0034] Figure 10 is the axial view of one perspective of the first opposite door leaf;

[0035] Figure 11 is the axial view of another perspective of the first opposite door leaf;

[0036] Figure 12 is the axial view of one perspective of the second opposite door leaf;

[0037] Figure 13 is the axial view of another perspective of the second opposite door leaf;

[0038] Figure 14 is the axial view of the locking device;

[0039] Figure 15 is the axial view of the safety device;

[0040] Figure 16 is the assembly drawing of the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely and the self-unloading vehicle carriage, provided by the embodiment of the utility model;

[0041] Figure 17It is the plane schematic view that the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely is assembled with the carriage of the self-unloading vehicle together in the opened upward state provided by the embodiment of the utility model;

[0042] Figure 18 It is the axonometric schematic view that the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely is assembled with the carriage of the self-unloading vehicle together in the opened oppositely state provided by the embodiment of the utility model;

[0043] Figure 19 It is the sectional view that the rear door structure of the self-unloading vehicle which can be opened upward and opened oppositely is assembled with the carriage of the self-unloading vehicle together provided by the embodiment of the utility model;

[0044] Figure 20 It is Figure 19 The enlarged view of N in the middle;

[0045] Mark explanation:

[0046] 100, rear door main frame; 101, rear door left vertical frame; 102, rear door right vertical frame; 103, rear door upper horizontal frame; 104, rear door lower horizontal frame; 105, rear door support rod; 106, artificial lock hook blocking pin; 107, movable rear connecting seat; 107a, first connecting seat; 107b, second connecting seat; 108, rear door reinforcing rib;

[0047] 200, first opposite door leaf; 201, first opposite door leaf frame; 202, first opposite door plate; 201a, first small door vertical frame; 201b, first small door horizontal frame; 201c, first small door inclined frame; 203, first rear door clamping strip;

[0048] 300, second opposite door leaf; 301, second opposite door leaf frame; 302, second opposite door plate; 301a, second small door vertical frame; 301b, second small door horizontal frame; 301c, second small door inclined frame; 303, second rear door clamping strip; 304, rear door middle strip;

[0049] 400, locking device; 401, rear door lock rod; 402, rear door pull rod; 403, rear pull rod connecting pipe; 404, rear door pull rod fixed seat; 405, rear door lock rod fixed pile; 406, small lock hook; 407, rear door fixed pin;

[0050] 500, hinge;

[0051] 600, safety device; 601, safety bolt; 602, safety bolt shaft pipe; 603, safety bolt seat; 604, safety bolt handle;

[0052] 700, double connecting seat;

[0053] 800, artificial lock hook;

[0054] 900, carriage bottom plate. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. The components of the utility model embodiment described and shown in the drawings can be arranged and designed in various different configurations.

[0056] Therefore, the detailed description of the embodiments of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0057] In the description of the utility model embodiment, it should be noted that, unless explicitly specified and limited, if the terms "arrange", "install", "connect", "connect" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0058] The utility model will be further described below in combination with the drawings:

[0059] Referring to Figures 1 to 18 The utility model embodiment provides a kind of self-unloading truck rear door structure that can be opened and split, including rear door main frame 100 and first split door leaf 200 and second split door leaf 300 installed on rear door main frame 100;Wherein, the upper end of rear door main frame 100 is respectively hinged with the left and right two compartments side plates of self-unloading truck, and the lower end is respectively locked with the left and right two compartments side plates of self-unloading truck;The side of first split door leaf 200 and second split door leaf 300 away from each other is respectively hinged with rear door main frame 100, and the side close to each other is mutually locked by locking device 400;Wherein, rear door main frame 100 can be with first split door leaf 200 and second split door leaf 300 together to turn over upwards and downwards, realize the opening and closing of self-unloading truck rear door;First split door leaf 200 and second split door leaf 300 can be opened outward and folded inward around rear door main frame 100, realize the opening and closing of self-unloading truck rear door.

[0060] Specifically, the rear door main frame 100 will drive the first pair of door leaves 200 and the second pair of door leaves 300 to turn up and turn down together under the action of the rear door lifting cylinder (not shown in the figure), so as to realize the opening and closing of the rear door of the dump truck.

[0061] Specifically, in the embodiment of the utility model, referring to Figure 6 and Figure 7 It is shown that the rear door main frame 100 comprises a rear door left vertical frame 101, a rear door right vertical frame 102, a rear door upper horizontal frame 103 and a rear door lower horizontal frame 104; wherein the upper end of the rear door left vertical frame 101 and the rear door right vertical frame 102 is provided with a rear door support rod 105, and the lower end is provided with a manual lock hook stop pin 106; the upper end of the rear door left vertical frame 101 and the rear door right vertical frame 102 is hinged through the rear door support rod 105 and the double seat 700 provided on the left and right two car body side plates of the dump truck respectively, and the lower end of the rear door left vertical frame 101 and the rear door right vertical frame 102 is locked through the manual lock hook stop pin 106 and the manual lock hook 800 provided on the left and right two car body side plates of the dump truck respectively; the rear door upper horizontal frame 103 is arranged on the upper part of the side close to the car body of the rear door left vertical frame 101 and the rear door right vertical frame 102, and the left and right ends of the rear door upper horizontal frame 103 are detachably connected with the rear door left vertical frame 101 and the rear door right vertical frame 102 respectively; the rear door lower horizontal frame 104 is arranged on the lower part of the side close to the car body of the rear door left vertical frame 101 and the rear door right vertical frame 102, and the left and right ends of the rear door lower horizontal frame 104 are fixedly connected with the rear door left vertical frame 101 and the rear door right vertical frame 102 respectively.

[0062] More specifically, in the embodiment of the utility model, the rear door left vertical frame 101 and the rear door right vertical frame 102 are composed of a channel steel and a flat iron arranged on the side of the channel steel slot; the rear door upper horizontal frame 103 and the rear door lower horizontal frame 104 are rectangular tubes.

[0063] Specifically, in the embodiment of the utility model, the left and right ends of the rear door upper horizontal frame 103 are detachably connected with the rear door left vertical frame 101 and the rear door right vertical frame 102 through an active rear connecting seat 107 respectively. The rear door upper horizontal frame 103 can be disassembled when the height of the transported goods exceeds the height of the door leaves, so as to avoid the interference between the goods and the rear door upper horizontal frame 103.

[0064] More specifically, in the embodiment of the utility model, movable rear connecting seat 107 contains first connecting seat 107a and second connecting seat 107b, wherein, first connecting seat 107a is fixedly connected with corresponding rear door left vertical frame 101 or rear door right vertical frame 102, second connecting seat 107b is fixedly connected with rear door upper horizontal frame 103, and first connecting seat 107a is connected with second connecting seat 107b through bolt.

[0065] It can be understood that the structure of movable rear connecting seat 107 is not limited to the structure shown in the figure, and those skilled in the art can make adaptive adjustment according to actual needs.

[0066] Specifically, in the embodiment of the utility model, in order to enhance the strength of rear door main frame 100, a rear door reinforcing rib 108 is further arranged at the connecting part of rear door lower horizontal frame 104, rear door left vertical frame 101 and rear door right vertical frame 102.

[0067] Specifically, in the embodiment of the utility model, referring to Figures 6 to 13 As shown in the figure, the first pair of door leaves 200 comprises a first pair of door leaf frame 201 and a first pair of door plate 202 arranged on the back of the first pair of door leaf frame 201; the second pair of door leaves 300 comprises a second pair of door leaf frame 301 and a second pair of door plate 302 arranged on the back of the second pair of door leaf frame 301; wherein, the side of the first pair of door leaf frame 201 and the second pair of door leaf frame 301 away from each other is hingedly connected to the rear door main frame 100 through a plurality of hinges 500, and the side close to each other is locked through the locking device 400.

[0068] Specifically, in the embodiment of the utility model, referring to Figures 8 to 13 As shown in the figure, the first pair of door leaf frame 201 comprises two parallel first small door vertical frames 201a, two parallel first small door horizontal frames 201b and a first small door inclined frame 201c arranged between the two parallel first small door horizontal frames 201b; wherein, the arrangement of the first small door inclined frame 201c is conducive to improving the strength of the first pair of door leaf frame 201.

[0069] Specifically, in the embodiment of the utility model, referring to Figures 8 to 13 As shown in the figure, the second pair of door leaf frame 301 comprises two parallel second small door vertical frames 301a, two parallel second small door horizontal frames 301b and a second small door inclined frame 301c arranged between the two parallel second small door horizontal frames 301b; wherein, the arrangement of the second small door inclined frame 301c is conducive to improving the strength of the second pair of door leaf frame 301.

[0070] More specifically, in the embodiment of the utility model, the first small door vertical frame 201a, the first small door horizontal frame 201b and the first small door inclined frame 201c of the first pair of door leaf frame 201 are all made of channel steel.

[0071] More specifically, in the embodiment of the utility model, the second small door vertical frame 301a, the second small door horizontal frame 301b and the second small door inclined frame 301c of the second pair of door leaf frames 301 are also made of channel steel.

[0072] Specifically, in the embodiment of the utility model, referring to Figures 8 to 13 As shown in the figure, the first pair of door panels 202 is provided with a first rear door clamping strip 203 at the lower end edge close to the side of the self-unloading vehicle compartment; the setting of the first rear door clamping strip 203 is conducive to plugging the gap between the compartment floor and the first pair of door panels 202, preventing the materials loaded in the compartment from flowing out from the gap between the compartment floor 900 and the rear door, referring to Figure 19 and Figure 20 As shown in the figure.

[0073] Specifically, in the embodiment of the utility model, referring to Figures 8 to 13 As shown in the figure, the second pair of door panels 302 is provided with a second rear door clamping strip 303 at the lower end edge close to the side of the self-unloading vehicle compartment; similarly, the setting of the second rear door clamping strip 303 is conducive to plugging the gap between the compartment floor and the second pair of door panels 302, preventing the materials loaded in the compartment from flowing out from the gap between the compartment floor 900 and the rear door.

[0074] Specifically, in the embodiment of the utility model, referring to Figures 8 to 13 As shown in the figure, the second pair of door panels 302 is provided with a rear door middle strip 304 close to the side of the first pair of door panels 202; the setting of the rear door middle strip 304 is conducive to plugging the gap between the second pair of door panels 302 and the first pair of door panels 202, preventing the materials loaded in the compartment from flowing out from the gap between the two pairs of door panels.

[0075] Specifically, in the embodiment of the utility model, referring to Figures 6 to 14 As shown in the figure, the locking device 400 comprises a rear door lock rod 401, a rear door pull rod 402, a rear pull rod connecting pipe 403 and a rear door pull rod fixing seat 404; wherein the rear door lock rod 401 is rotatably supported on the side of the first pair of door leaf frames 201 close to the second pair of door leaf frames 301 through a plurality of rear door lock rod fixing piles 405, one end of the rear door pull rod 402 is fixedly connected with the rear door lock rod 401 through the rear door pull rod connecting pipe 403, the other end is locked with the rear door pull rod fixing seat 404, the rear door pull rod fixing seat 404 is fixed on the first pair of door panels 202, the upper and lower ends of the rear door lock rod 401 are respectively provided with a small lock hook 406, the small lock hook 406 located at the upper end of the rear door lock rod 401 is locked and matched with the rear door fixing pin 407 arranged on the second pair of door leaf frames 301, and the small lock hook 406 located at the lower end of the rear door lock rod 401 is locked and matched with the rear door fixing pin 407 arranged on the rear door main frame 100.

[0076] Specifically, the unlocking and locking working principle of the locking device 400 is as follows:

[0077] When the locking device 400 needs to be unlocked, the rear door lock rod 401 can be rotated by rotating the rear door pull rod 402 outward (i.e. away from the rear door direction), so that the small lock hooks 406 at the upper and lower ends of the rear door lock rod 401 are counterclockwise rotated, thereby making the small lock hooks 406 at the upper and lower ends of the rear door lock rod 401 disengage from the rear door fixed pins 407 on the second pair of door leaf frames 301 and the rear door fixed pins 407 on the rear door main frame 100, thereby realizing the unlocking of the locking device 400.

[0078] When the locking device 400 needs to be locked, the rear door lock rod 401 can be rotated by rotating the rear door pull rod 402 inward (i.e. towards the rear door direction), so that the small lock hooks 406 at the upper and lower ends of the rear door lock rod 401 are clockwise rotated, thereby making the small lock hooks 406 at the upper and lower ends of the rear door lock rod 401 hook the rear door fixed pins 407 on the second pair of door leaf frames 301 and the rear door fixed pins 407 on the rear door main frame 100, thereby realizing the locking of the locking device 400.

[0079] Specifically, in the embodiment of the utility model, in order to guarantee that the first pair of door leafs 200 and the second pair of door leafs 300 cannot be opened after being locked, an insurance device 600 is further arranged at the lower end of the second pair of door leaf frames 301, and the insurance device 600 comprises an insurance latch 601, an insurance latch shaft pipe 602, an insurance latch seat 603 and an insurance latch handle 604. One end of the insurance latch 601 is connected with the insurance latch handle 604, and the other end of the insurance latch 601 passes through the insurance latch shaft pipe 602 and is inserted and matched with the insurance latch seat 603. The insurance latch shaft pipe 602 is fixedly arranged on the second pair of door leaf frames 301, and the insurance latch seat 603 is fixed on the rear door main frame 100. When in use, the insurance device 600 can be unlocked by pulling the insurance latch 601 upward, so that the insurance latch 601 is disengaged from the insurance latch seat 603. The insurance device 600 can be locked by loosening the insurance latch 601 downward, so that the insurance latch 601 is inserted and matched with the insurance latch seat 603.

[0080] The rear door structure of the dump truck provided by the embodiment of the utility model can be opened in the state of the carriage rear door being lifted or not being lifted. Specifically, in the state of the carriage rear door being lifted, the rear door structure can be opened upward, as shown in Figure 17 ; in the state of the carriage rear door not being lifted, the rear door structure can be opened, as shown in Figure 18 .

[0081] Finally, it is explained that the above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A self-unloading truck rear door structure that can be opened upward and opened in two halves, characterized by: The utility model relates to a rear door frame (100) and the first pair of door leaves (200) and the second pair of door leaves (300) installed on the rear door frame (100), the upper end of the rear door frame (100) is hinged to the left and right side plates of the dump truck, the lower end is locked to the left and right side plates of the dump truck, the side of the first pair of door leaves (200) and the second pair of door leaves (300) away from each other is hinged to the rear door frame (100) respectively, and the side of the first pair of door leaves (200) and the second pair of door leaves (300) close to each other is locked to each other through the locking device (400), wherein the rear door frame (100) can be turned up and down with the first pair of door leaves (200) and the second pair of door leaves (300), and the opening and closing of the rear door of the dump truck are realized, and the first pair of door leaves (200) and the second pair of door leaves (300) can be opened outward and folded inward around the rear door frame (100), and the opening and closing of the rear door of the dump truck are realized. The rear door frame (100) comprises a rear door left vertical frame (101), a rear door right vertical frame (102), a rear door upper horizontal frame (103) and a rear door lower horizontal frame (104), the upper end of the rear door left vertical frame (101) and the rear door right vertical frame (102) is provided with a rear door support rod (105), and the lower end is provided with a manual lock hook blocking pin (106), the upper end of the rear door left vertical frame (101) and the rear door right vertical frame (102) is hinged to the double seat (700) arranged on the left and right side plates of the dump truck through the rear door support rod (105), the lower end of the rear door left vertical frame (101) and the rear door right vertical frame (102) is locked to the manual lock hook (800) arranged on the left and right side plates of the dump truck through the manual lock hook blocking pin (106), the rear door upper horizontal frame (103) is arranged on the upper part of the side close to the dump truck compartment of the rear door left vertical frame (101) and the rear door right vertical frame (102), and the left and right ends of the rear door upper horizontal frame (103) are detachably connected with the rear door left vertical frame (101) and the rear door right vertical frame (102) respectively, and the rear door lower horizontal frame (104) is arranged on the lower part of the side close to the dump truck compartment of the rear door left vertical frame (101) and the rear door right vertical frame (102), and the left and right ends of the rear door lower horizontal frame (104) are fixedly connected with the rear door left vertical frame (101) and the rear door right vertical frame (102) respectively. The first pair of door leaves (200) comprises a first pair of door leaf frame (201) and a first pair of door panel (202) arranged on the back of the first pair of door leaf frame (201). The second pair of door leaves (300) comprises a second pair of door leaf frame (301) and a second pair of door panel (302) arranged on the back of the second pair of door leaf frame (301). The side of the first pair of door leaf frame (201) and the second pair of door leaf frame (301) away from each other is hinged to the rear door frame (100) through a plurality of hinges (500), and the side of the first pair of door leaf frame (201) and the second pair of door leaf frame (301) close to each other is locked to each other through the locking device (400). The locking device (400) comprises a rear door lock rod (401), a rear door pull rod (402), a rear pull rod connecting pipe (403) and a rear door pull rod fixing seat (404), the rear door lock rod (401) is rotatably supported on one side of the first pair of door leaf frame (201) close to the second pair of door leaf frame (301) through a plurality of rear door lock rod fixing piles (405), one end of the rear door pull rod (402) is fixedly connected with the rear door lock rod (401) through the rear door pull rod connecting pipe (403), the other end is locked with the rear door pull rod fixing seat (404), the rear door pull rod fixing seat (404) is fixed on the first pair of door panel (202), and the upper and lower ends of the rear door lock rod (401) are respectively provided with a small lock hook (406), the small lock hook (406) at the upper end of the rear door lock rod (401) is locked and matched with the rear door fixing pin (407) arranged on the second pair of door leaf frame (301), and the small lock hook (406) at the lower end of the rear door lock rod (401) is locked and matched with the rear door fixing pin (407) arranged on the rear door main frame (100).

2. The up and opposed opening dump truck rear door structure of claim 1, wherein: The left and right ends of the rear door upper horizontal frame (103) are respectively detachably connected with the rear door left vertical frame (101) and the rear door right vertical frame (102) through an active rear connecting seat (107).

3. The up and opposed opening dump truck rear door structure of claim 2, wherein: The active rear connecting seat (107) comprises a first connecting seat (107a) and a second connecting seat (107b), the first connecting seat (107a) is fixedly connected with the corresponding rear door left vertical frame (101) or rear door right vertical frame (102), the second connecting seat (107b) is fixedly connected with the rear door upper horizontal frame (103), and the first connecting seat (107a) and the second connecting seat (107b) are connected through bolts.

4. The rear door structure of the dump truck capable of being opened upward and opened in a pair of doors according to claim 1, characterized in that: The first pair of door leaf frame (201) comprises two parallel first small door vertical frames (201a), two parallel first small door horizontal frames (201b) and a small door inclined frame (201c) arranged between the two parallel first small door horizontal frames (201b); The second pair of door leaf frame (301) comprises two parallel second small door vertical frames (301a), two parallel second small door horizontal frames (301b) and a small door inclined frame (301c) arranged between the two parallel second small door horizontal frames (301b).

5. The rear door structure of the dump truck capable of being opened upward and opened in a pair of doors according to claim 1, characterized in that: The first pair of door panel (202) is provided with a first rear door clamping strip (203) at the lower end edge close to one side of the dump truck compartment; The second pair of door panel (302) is provided with a second rear door clamping strip (303) at the lower end edge close to one side of the dump truck compartment.

6. The up and opposed opening dump truck rear door structure of claim 1, wherein: The second pair of door panel (302) is provided with a rear door middle clamping strip (304) close to one side of the first pair of door panel (202).

7. The up and opposed opening dump truck rear door structure of claim 1, wherein: The lower end of the second pair of door leaf frames (301) is further provided with a safety device (600), which comprises a safety bolt (601), a safety bolt shaft tube (602), a safety bolt seat (603) and a safety bolt handle (604). One end of the safety bolt (601) is connected with the safety bolt handle (604), and the other end is inserted into the safety bolt seat (603) through the safety bolt shaft tube (602). The safety bolt shaft tube (602) is fixedly arranged on the second pair of door leaf frames (301), and the safety bolt seat (603) is fixedly arranged on the rear door main frame (100).

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