Vehicle rear door assembly and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a vehicle rear door assembly which comprises a rear door connected to a cargo compartment of a vehicle. The opening and closing piece is rotatably connected to a cargo compartment of the vehicle and used for closing and opening the rear door, an inclined-plane-shaped sliding face and a clamping groove with the arc-shaped bottom are formed in the opening and closing piece, and the sliding face and the clamping groove are arranged adjacently; the chain is used for connecting the switch piece with a frame of the vehicle; when the cargo compartment is in a horizontal state, the tail end of the rear door is clamped in the clamping groove so that the rear door can be closed relative to the cargo compartment, and when the cargo compartment overturns backwards, the opening and closing piece rotates relative to the rear door under the action of gravity so that the rear door can be separated from the clamping groove and slide relative to the sliding face to be separated from the opening and closing piece, and therefore the rear door is opened relative to the cargo compartment. The back door can be rapidly opened by the switch piece through the sliding face and the clamping groove, the stress load of the chain is reduced, and safety accidents caused by failure and breakage of the switch piece and the chain are prevented. The utility model further discloses a vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a vehicle rear door assembly and a vehicle. Background Technology

[0002] Dump trucks are a primary means of transporting goods and are widely used in industries such as construction. However, the operating environment for dump trucks is becoming increasingly harsh, and the demands for their transport efficiency are also rising. Considering the requirements of the operating conditions of dump trucks, the rear door must remain reliably locked during transport, and it must be able to open automatically for unloading. Currently, the gravity-operated locking structure for the rear door is the most common, mainly composed of a hook, a chain, and a lower fixing seat for the chain. When the cargo in the compartment is being unloaded, the rear door obstructs the cargo inside, the hook disengages slowly, and is prone to breakage due to prolonged stress. Simultaneously, the chain connecting the hook is under significant tensile load and is in a taut state, making it susceptible to breakage. This can lead to problems such as the rear door not closing properly, or even the locking structure failing, posing a serious safety hazard. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a vehicle rear door assembly and a vehicle.

[0004] This utility model provides a vehicle rear door assembly, including:

[0005] The rear door is attached to the cargo box of the vehicle;

[0006] A switch element for closing and opening the rear door is rotatably connected to the cargo box of the vehicle. The switch element has a sloping sliding surface and an arc-shaped engaging groove at the bottom, and the sliding surface and the engaging groove are arranged adjacent to each other.

[0007] And a chain for connecting the switch to the vehicle frame;

[0008] When the cargo compartment is in a horizontal position, the end of the rear door engages in the engagement groove to close the rear door relative to the cargo compartment. When the cargo compartment is flipped backward, the switch rotates relative to the rear door under the action of gravity, causing the rear door to disengage from the engagement groove and slide relative to the sliding surface until it is disengaged from the switch, thereby opening relative to the cargo compartment.

[0009] In one embodiment, the switching element includes at least one side plate, the side plate including a working end and a connecting end disposed opposite each other, the sliding surface and the engaging groove forming the working end of the side plate, the connecting end of the side plate being rotatably connected to the cargo box of the vehicle, and a protrusion provided between the working end and the connecting end of the side plate, the protrusion being connected to the chain.

[0010] In one embodiment, when the rear door is in the closed state, the angle α formed by the sliding surface and the horizontal plane is in the range of 20°≤α≤70°.

[0011] In one embodiment, the side plate further includes a first through hole and a second through hole. The first through hole is located in the protrusion, one end of the chain is fixed in the first through hole, and the second through hole is located in the connecting end. The side plate is rotatably connected to the cargo box through the second through hole.

[0012] In one embodiment, the switch includes two side plates, a connecting beam is provided between the two side plates, and two second through holes are respectively provided with connecting plates.

[0013] In one embodiment, the vehicle rear door assembly further includes a first fixing seat and a second fixing seat. The first fixing seat is located at the bottom of the rear end of the cargo box and is hinged to the two side plates through the second through hole. The second fixing seat is located at the bottom of the rear end of the frame and is connected to the chain.

[0014] In one embodiment, the vehicle rear door assembly further includes a fixing component and a fastener. Two fixing components are provided, one of which is located in the first through hole and connected to one end of the chain, and the other of which is located in the second through hole and hinged to the first fixing seat. One end of the fastener is connected to the second fixing seat, and the other end is connected to the other end of the chain.

[0015] In one embodiment, the fixing assembly includes a nut, a cotter pin, and a bolt, one end of the chain is connected to the bolt, the nut is connected to the bolt, and the cotter pin is inserted into the nut and the bolt.

[0016] In one embodiment, the fastener includes a head, a rod, and an arc-shaped connecting portion disposed between the head and the rod. The rod is fixedly connected to the second fixing seat, and the head is provided with a third through hole for connecting to one end of the chain.

[0017] Another embodiment of this application also provides a vehicle, including a cargo box, a frame, and a vehicle rear door assembly provided in the foregoing embodiments. The cargo box is disposed on the frame, and the bottom end of the rear of the cargo box is hinged to the upper end of the rear of the frame. The rear door is connected to the cargo box. A switch is rotatably connected to the cargo box. One end of the chain is connected to the switch, and the other end is connected to the frame.

[0018] The beneficial effects of this utility model are as follows: the sliding surface and the engaging groove not only lock the rear door, but also allow the rear door to disengage and open quickly, preventing the failure and breakage of the switch and chain, increasing the service life of the vehicle's rear door assembly, and improving safety and stability. The engaging groove is designed in an arc shape, which allows the end of the rear door to better engage in the engaging groove. The sliding surface is designed in an inclined shape, which further allows the rear door to disengage and open quickly, reducing the stress load on the chain and switch, further improving the service life and safety of the vehicle's rear door assembly, and improving the vehicle's transportation efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of the vehicle rear door assembly in the closed state according to an embodiment of the present invention.

[0021] Figure 2 This is a structural schematic diagram of the vehicle rear door assembly in the open state according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of a switch component according to an embodiment of the present invention at one angle.

[0023] Figure 4 This is a structural schematic diagram of a switch component according to an embodiment of the present invention from another angle.

[0024] Figure 5 This is a schematic diagram of the structure of the switch and fixing components according to an embodiment of the present invention.

[0025] Figure 6 This is a structural schematic diagram of a fastener according to an embodiment of the present invention. Detailed Implementation

[0026] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0030] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0031] Please refer to Figure 1-6 It illustrates a vehicle rear door assembly provided in an embodiment of the present invention, comprising:

[0032] The rear door 7 is connected to the cargo box 8 of the vehicle;

[0033] A switch 1 for closing and opening the rear door 7 is rotatably connected to the cargo box 8 of the vehicle. The switch 1 has a sloping sliding surface 111 and an arc-shaped engaging groove 112 at the bottom. The sliding surface 111 and the engaging groove 112 are arranged adjacent to each other.

[0034] And a chain 2 for connecting the switch 1 to the vehicle frame 9;

[0035] When the cargo compartment 8 is in a horizontal state, the end of the rear door 7 engages in the engagement groove 112 to close the rear door 7 relative to the cargo compartment 8. When the cargo compartment 8 is flipped backward, the switch 1 rotates relative to the rear door 7 under the action of gravity, causing the rear door 7 to disengage from the engagement groove 112 and slide relative to the sliding surface 111 until it disengages from the switch 1, thereby opening relative to the cargo compartment 8.

[0036] like Figure 1-2 and Figure 4As shown in the embodiment, the switch 1 has a sloping sliding surface 111 and an arc-shaped engaging groove 112 on the side near the rear door. One end of the chain 2 is connected to the switch 1, and the other end is connected to the frame 9. The sliding surface and engaging groove not only lock the rear door, but also allow the rear door to disengage and open quickly, preventing failure and breakage of the switch and chain, increasing the service life of the vehicle's rear door assembly, and improving safety and stability. The engaging groove is designed to be arc-shaped. By increasing the radius of the arc, the end of the rear door can be better engaged in the engaging groove. In addition, the sloping sliding surface further allows the rear door to disengage and open quickly, reducing the load on the chain and switch, further improving the service life and safety of the vehicle's rear door assembly, and improving the vehicle's transportation efficiency.

[0037] like Figure 4 As shown, in one embodiment, the sliding surface 111 and the engaging groove 112 are connected by an arc transition, which can ensure the uniformity of the overall force, prevent damage to the rear door 7 and prevent uneven force from causing the sliding surface 111 and the engaging groove 112 to break, thereby enhancing the overall stability and service life of the switch 1.

[0038] In one embodiment, the switch 1 includes at least one side plate 11, the side plate 11 includes a working end and a connecting end disposed opposite to each other, a sliding surface 111 and a locking groove 112 form the working end of the side plate 11, the connecting end of the side plate 11 is used to rotatably connect with the cargo box 8 of the vehicle, and a protrusion 113 is provided between the working end and the connecting end of the side plate 11, the protrusion 113 being connected to the chain 2.

[0039] like Figure 1-4 As shown, in this embodiment, one end of the side plate 11 is a working end formed by a sliding surface 111 and a locking groove 112. The working end is used to close and open the rear door 7. The other end of the side plate 11 is a connecting end for rotatably connecting with the cargo box 8 of the vehicle. A protrusion 113 is provided between the working end and the connecting end of the side plate 11. One end of the chain 2 is fixedly connected to the protrusion 113, and the other end is fixedly connected to the frame 9.

[0040] In one embodiment, when the rear door 7 is in the closed state, the angle α formed by the sliding surface 111 and the horizontal plane is in the range of 20°≤α≤70°.

[0041] like Figure 4 As shown, in this embodiment, the included angle α ranges from 20°≤α≤70°. When the cargo box 8 flips backward, the rear door 7 can be quickly disengaged and opened in advance. By increasing the included angle α, the rear door 7 can be opened even earlier, making unloading more convenient and faster. When the cargo box 8 is in a horizontal state, it can also be locked with the locking groove 112 to ensure stability during transportation.

[0042] In one embodiment, the side plate 11 further includes a first through hole 114 and a second through hole 115. The first through hole 114 is provided in the protrusion 113, one end of the chain 2 is fixed in the first through hole 114, and the second through hole 115 is provided in the connecting end. The side plate 11 is rotatably connected to the cargo box 8 through the second through hole 115.

[0043] like Figure 2 and Figure 4 As shown, in this embodiment, both the first through hole 114 and the second through hole 115 are circular through holes. When the cargo box 8 flips backward, the switch 1 gradually tilts backward, and the stress on the chain 2 increases sharply. The angle formed by the line connecting the center point of the first through hole 114 and the center point of the second through hole 115 with the vertical direction is the opening angle. The opening angle gradually increases. When the rear door 7 and the switch 1 separate from each other, the opening angle at this time is the separation angle β, and the tensile load of the chain 2 reaches its peak value.

[0044] By designing a sliding surface 111 and a locking groove 112 on the side plate 11, the separation angle β can be reduced, thereby enabling the rear door to open earlier and unload quickly, reducing the peak load on the chain and switching components, and preventing the failure and breakage of the switching components 1 and the chain 2, thus improving the overall safety, stability and service life. By increasing the angle α formed by the sliding surface 111 and the horizontal plane and increasing the arc radius of the locking groove 112, the separation angle β can be further reduced, further enabling the switching components 1 and the rear door 7 to disengage earlier, and further improving the overall safety, stability and service life.

[0045] In one embodiment, the switch 1 includes two side plates 11, a connecting beam 12 is provided between the two side plates 11, and two second through holes 115 are respectively provided with connecting plates 13.

[0046] like Figure 3-4 As shown, in this embodiment, the side plate 11 is made of wear-resistant material, the connecting beam 12 is made of high-strength material, and the connecting plate 13 is made of wear-resistant material. The two side plates 11 are welded to the connecting beam 12. The connecting plate 13 is a flange plate, which is respectively set on the second through hole 115 on the outer side of the two side plates 11 and welded to them. Compared with the traditional casting structure, the overall deformation of the switch 1 is small, which increases wear resistance and structural strength and reduces processing defects caused by casting.

[0047] In one embodiment, the vehicle rear door assembly further includes a first fixing seat 3 and a second fixing seat 4. The first fixing seat 3 is located at the bottom of the rear end of the cargo box 8 and is hinged to the two side plates 11 through the second through hole 115. The second fixing seat 4 is located at the bottom of the rear end of the frame 9 and is connected to the chain 2.

[0048] like Figure 1-2As shown, in this embodiment, one end of the chain 2 is fixed in the first through hole 114, and the other end is fixedly connected to the second fixing seat 4. The second fixing seat 4 is welded to the bottom of the rear end of the frame 9.

[0049] In one embodiment, the vehicle rear door assembly further includes a fixing component 5 and a fastener 6. There are two fixing components 5, one of which is located in the first through hole 114 and connected to one end of the chain 2, and the other fixing component 5 is located in the second through hole 115 and hinged to the first fixing seat 3. One end of the fastener 6 is connected to the second fixing seat 4, and the other end is connected to the other end of the chain 2.

[0050] like Figure 1-2 As shown, in this embodiment, the fastener 6 is fixedly connected to the second fixing seat 4, and the bottom end of the rear of the cargo box 8 is hinged to the upper end of the rear of the frame 9. The vertical distance between the center of the connection between the fastener 6 and the second fixing seat 4 and the center of the hinge between the rear of the cargo box 8 and the rear of the frame 9 is H. By welding the second fixing seat 4 to the bottom of the rear of the frame 9, the size of H is increased, thereby increasing the rate of increase of the opening angle, thereby reaching the separation angle β earlier, further realizing the separation of the switch 1 and the rear door 7 earlier, reducing the peak tension load of the chain 2, further improving the overall safety of the vehicle rear door assembly, and extending its service life.

[0051] In one embodiment, the fixing component 5 includes a nut 51, a cotter pin 52, and a bolt 53. One end of the chain 2 is connected to the bolt 53, the nut 51 is connected to the bolt 53, and the cotter pin 52 is inserted into the nut 51 and the bolt 53.

[0052] like Figure 5 As shown, in this embodiment, one bolt 53 passes through the first through hole 114 and is fixedly connected to one end of the chain 2, and the other bolt 53 passes through the second through hole 115 to rotatably connect the two side plates 11 to the first fixed seat 3. The nut 51 is a slotted nut, and the two nuts 51 are respectively threaded onto the two bolts 53 for fixation. The two cotter pins 52 are respectively inserted into the slots of the corresponding nuts 51 and the tail holes of the bolts 53 to further fix the nuts 51 and bolts 53. The design of this fixing component 5 improves product consistency, reduces structural defects caused by inadequate control during machining and heat treatment, and further enhances the overall stability.

[0053] In one embodiment, the fastener 6 includes a head 61, a rod 63, and an arc-shaped connecting portion 64 disposed between the head 61 and the rod 63. The rod 63 is fixedly connected to the second fixing seat 4, and the head 61 is provided with a third through hole 62 for connecting to one end of the chain 2.

[0054] like Figure 1-2 and Figure 6As shown, in this embodiment, the rod 63 passes through the second fixed seat 4 and is threadedly fixed. A pin is provided in the third through hole 62, and one end of the chain 2 is fixedly connected to the pin. The fastener 6 is a forged structure, which can increase the structural strength. The arc-shaped connection part 64 can avoid stress concentration caused by abrupt changes in cross-section, which can lead to fracture. By increasing the arc radius of the arc-shaped connection part 64, the overall stability can be further enhanced, ensuring more uniform stress distribution and further reducing the risk of fracture. The third through hole 62 is a circular through hole, and by increasing the hole diameter, the failure frequency can be reduced.

[0055] Transportation stage: At this time, the cargo box 8 is in a horizontal state, and the end of the rear door 7 is engaged in the engagement groove 112 to close the rear door 7. One end of the chain 2 is connected to the switch 1, and the other end is connected to the second fixed seat 4 on the frame 9. Through the pulling force of the chain 2, the end of the rear door 7 is further engaged in the engagement groove 112 and locked.

[0056] Unloading stage: The front end of the cargo box 8 is lifted upwards, and the cargo box 8 flips backwards around the hinge point between the rear end and the frame 9. The switch 1 rotates relative to the rear door 7 under the action of gravity, causing the rear door 7 to disengage from the engagement groove 112 and slide relative to the sliding surface 111. When the separation angle β is reached, the rear door 7 and the switch 1 disengage from each other. At this time, the rear door opens and unloading begins. After unloading is completed, the front end of the cargo box 8 falls downwards, and the cargo box 8 gradually returns to a horizontal state. The rear door 7 gradually closes under its own gravity, and the chain 2 gradually tightens, forcibly pulling the switch 1 back, so that the end of the rear door 7 engages in the engagement groove 112 and locks.

[0057] The vehicle rear door assembly of this embodiment can be applied to mining dump trucks, and of course it can also be applied to other vehicles such as heavy trucks, without limitation.

[0058] Another embodiment of the present invention provides a vehicle, including a cargo box 8, a frame 9, and a vehicle rear door assembly provided in the aforementioned embodiments. The cargo box 8 is disposed on the frame 9, and the bottom end of the rear of the cargo box 8 is hinged to the upper end of the rear of the frame 9. The rear door 7 is connected to the cargo box 8. A switch 1 is rotatably connected to the cargo box 8. One end of a chain 2 is connected to the switch 1, and the other end is connected to the frame 9.

[0059] The vehicle in this embodiment uses the rear door assembly provided in the aforementioned embodiments, which makes the opening and closing of the rear door faster and more convenient, and unloading easier, thereby improving transportation efficiency and ensuring safety and stability during transportation and unloading.

[0060] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A vehicle rear door assembly, characterized in that, include: The rear door (7) is connected to the cargo box (8) of the vehicle; A switch (1) for closing and opening the rear door (7) is rotatably connected to the cargo box (8) of the vehicle. The switch (1) has a sloping sliding surface (111) and an arc-shaped engagement groove (112) at the bottom. The sliding surface (111) and the engagement groove (112) are arranged adjacent to each other. And a chain (2) for connecting the switch (1) to the vehicle frame (9); When the cargo compartment (8) is in a horizontal state, the end of the rear door (7) engages in the engaging groove (112) to close the rear door (7) relative to the cargo compartment (8). When the cargo compartment (8) is flipped backward, the switch (1) rotates relative to the rear door (7) under the action of gravity, causing the rear door (7) to disengage from the engaging groove (112) and slide relative to the sliding surface (111) until it disengages from the switch (1), thereby opening relative to the cargo compartment (8).

2. The vehicle rear door assembly according to claim 1, characterized in that, The switch (1) includes at least one side plate (11), the side plate (11) includes a working end and a connecting end disposed opposite to each other, the sliding surface (111) and the engaging groove (112) form the working end of the side plate (11), the connecting end of the side plate (11) is used to rotatably connect with the cargo box (8) of the vehicle, and a protrusion (113) is provided between the working end and the connecting end of the side plate (11), the protrusion (113) being connected to the chain (2).

3. The vehicle rear door assembly according to claim 2, characterized in that, When the rear door (7) is closed, the angle α formed by the sliding surface (111) and the horizontal plane is in the range of 20°≤α≤70°.

4. The vehicle rear door assembly according to claim 2, characterized in that, The side plate (11) also includes a first through hole (114) and a second through hole (115). The first through hole (114) is located in the protrusion (113). One end of the chain (2) is fixed in the first through hole (114). The second through hole (115) is located in the connecting end. The side plate (11) is rotatably connected to the cargo box (8) through the second through hole (115).

5. The vehicle rear door assembly according to claim 4, characterized in that, The switch (1) includes two side plates (11), a connecting beam (12) is provided between the two side plates (11), and a connecting plate (13) is provided for each of the two second through holes (115).

6. The vehicle rear door assembly according to claim 5, characterized in that, The vehicle rear door assembly also includes a first fixing seat (3) and a second fixing seat (4). The first fixing seat (3) is located at the bottom of the rear end of the cargo box (8) and is hinged to the two side plates (11) through the second through hole (115). The second fixing seat (4) is located at the bottom of the rear end of the frame (9) and is connected to the chain (2).

7. The vehicle rear door assembly according to claim 6, characterized in that, The vehicle rear door assembly also includes a fixing component (5) and a fastener (6). There are two fixing components (5). One fixing component (5) is located in the first through hole (114) and connected to one end of the chain (2). The other fixing component (5) is located in the second through hole (115) and hinged to the first fixing seat (3). One end of the fastener (6) is connected to the second fixing seat (4), and the other end is connected to the other end of the chain (2).

8. The vehicle rear door assembly according to claim 7, characterized in that, The fixing component (5) includes a nut (51), a cotter pin (52) and a bolt (53), one end of the chain (2) is connected to the bolt (53), the nut (51) is connected to the bolt (53), and the cotter pin (52) is inserted into the nut (51) and the bolt (53).

9. The vehicle rear door assembly according to claim 7, characterized in that, The fastener (6) includes a head (61), a rod (63), and an arc-shaped connecting part (64) provided between the head (61) and the rod (63). The rod (63) is fixedly connected to the second fixing seat (4). The head (61) is provided with a third through hole (62) for connecting to one end of the chain (2).

10. A vehicle, characterized in that, The vehicle includes a cargo box (8), a frame (9), and a vehicle rear door assembly as described in any one of claims 1 to 9. The cargo box (8) is mounted on the frame (9), and the bottom end of the rear of the cargo box (8) is hinged to the upper end of the rear of the frame (9). The rear door (7) is connected to the cargo box (8). The switch (1) is rotatably connected to the cargo box (8). One end of the chain (2) is connected to the switch (1), and the other end is connected to the frame (9).

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