Rear door structure and dumper

Abstract

The rear door structure comprises a main plate, a bending part is arranged in the middle of the main plate, the cross section of the bending part is in a V shape, the bending part extends in the length direction of the main plate, the bending process is reduced, the machining speed is increased, the machining precision is more convenient to control, and the production quality and the production efficiency are high; the overall strength of the main board can be enhanced, the number of the reinforcing beams of the main board is reduced, then the welding amount is reduced, the risk of welding deformation and accumulation of welding stress are reduced, raw materials and welding materials are saved, the production period is shortened, the production efficiency is improved, and the weight of the rear door is reduced. The upper cross beam and the lower cross beam are fixedly arranged on the front face of the main plate, the left side plate and the right side plate are fixedly arranged on the left side and the right side of the main plate and fixedly connected with the main plate, the upper cross beam and the lower cross beam, a left vertical beam and a right vertical beam are omitted, the structure is simplified, and the weight is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dump trucks, in particular to a rear door structure and a dump truck. Background Art

[0002] The rear door of a dump truck is an important part of the dump truck. During the unloading process of the dump truck, the rear door rotates around the hinge axis under its own gravity or external force to realize the opening and closing of the rear door. Existing rear doors are all flat welded structures, and it is not easy to control the welding deformation, and it is difficult to ensure the subsequent installation quality. Problems such as too large and uneven gaps in the cargo box rear door are likely to occur. At the same time, the existing rear doors are too heavy, with high costs, and in the actual application process, due to the uneven contact surface between the rear door and the cargo box, the weld beads crack in advance, affecting the utilization rate of the vehicle.

[0003] Currently, a new type of rear door structure for dump trucks has emerged (such as the publication number CN220884170U). The rear door main board has an arc structure, and a left vertical beam and a right vertical beam are fixedly arranged on the left and right sides of the rear door main board. The arc structure is formed by a multi-channel bending process, which enhances the strength of the rear door main board itself, cancels the internal cross beams and vertical beams, reduces the welding amount, and further reduces the risk of welding deformation and the accumulation of welding stress.

[0004] However, the arc structure on the existing rear door main board needs to be formed by multiple bends, with high processing difficulty, difficult to control production quality, low production efficiency, and the left and right sides of the rear door main board are in the structure of a left vertical beam and a right vertical beam. Although the overall strength is improved, the overall weight of the rear door cannot be effectively reduced, which is not convenient for installation and use, and the production cost is high. Summary of the Utility Model

[0005] In order to solve the technical problems existing in the existing rear door structure of dump trucks in the above background art, that is, the arc structure on the rear door main board is difficult to process, the production quality and efficiency are low, the overall weight of the rear door is large, the production cost is high, and it is inconvenient for installation and use, the utility model provides a rear door structure and a dump truck.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a rear door structure, comprising: a main board, a bending part is arranged at the middle position of the main board, the cross section of the bending part is V-shaped, the bending part extends along the length direction of the main board, reducing the bending process, improving the processing speed, and making the processing accuracy easier to control, with high production quality and production efficiency. Through the arrangement of the bending part, the overall strength of the main board itself can be enhanced, the number of main board reinforcing beams is reduced, thereby reducing the welding amount, reducing the risk of welding deformation and the accumulation of welding stress, saving raw materials and welding materials, shortening the production cycle, improving the production efficiency, and reducing the weight of the rear door. The upper cross beam and the lower cross beam are both fixedly arranged on the front side of the main board, the left side board and the right side board are fixedly arranged on the left and right sides of the main board respectively, and the left side board and the right side board are fixedly connected with the main board, the upper cross beam and the lower cross beam. The settings of the left vertical beam and the right vertical beam are cancelled, simplifying the structure and reducing the weight.

[0008] Preferably, the lengths of the upper cross beam and the lower cross beam are the same as the length of the main board, which is convenient for connecting the two ends of the upper cross beam and the lower cross beam with the two sides of the main board through the left side board and the right side board.

[0009] Preferably, a left rear side board and a right rear side board are fixedly arranged on the back side of the main board, the left rear side board is fixedly connected with the left side board and the left side of the back side of the main board, and the right rear side board is fixedly connected with the right side board and the right side of the back side of the main board, so as to connect the left and right side boards with the main board by using the left and right rear side boards and improve the overall strength.

[0010] Preferably, both the left rear side board and the right rear side board are L-shaped boards, which can reduce the weight while ensuring the transmission of force.

[0011] Preferably, a lower support board is fixedly arranged at the lower part of the back side of the main board, the cross section of the lower support board is L-shaped, and the lower support board can strengthen the structural strength of the rear door, making it more stable when bearing the weight of goods and the impact during transportation. At the same time, it can reduce the shaking and jitter of the rear door during the opening and closing processes, ensure that the rear door can reach the predetermined position smoothly and accurately when opening, so as to ensure the high efficiency and safety of the unloading process.

[0012] Preferably, a shock pad is fixedly arranged at the bottom of the lower support board to reduce the vibration and impact on the rear door during loading and unloading, and extend the service life of the rear door.

[0013] The utility model provides a dump truck, which adopts the rear door structure.

[0014] It can be seen from the above technical solutions that the advantages of the utility model are as follows:

[0015] 1. There is a bending part at the middle position of the main board. Through the setting of the bending part, the overall strength of the main board itself can be enhanced, the number of main board strengthening beams is reduced, thereby reducing the welding amount, the risk of welding deformation and the accumulation of welding stress, shortening the production cycle, improving the production efficiency, and reducing the weight of the rear door. The cross-section of the bending part is V-shaped, reducing the bending process, improving the processing speed, and making the processing accuracy easier to control. The settings of the left side plate and the right side plate cancel the settings of the left vertical beam and the right vertical beam, simplifying the structure and reducing the weight.

[0016] 2. A lower support plate is fixedly arranged at the lower part of the back of the main board. The cross-section of the lower support plate is L-shaped. The lower support plate can strengthen the structural strength of the rear door, making it more stable when bearing the weight of goods and the impact during transportation. At the same time, it can reduce the shaking and jitter of the rear door during the opening and closing processes, ensuring that the rear door can reach the predetermined position smoothly and accurately when opened, thus guaranteeing the efficiency and safety of the unloading process.

[0017] 3. A shock pad is fixedly arranged at the bottom of the lower support plate to reduce the vibration and impact on the rear door during the loading and unloading processes, and extend the service life of the rear door. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a front view structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0020] Figure 2 It is a top view structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0021] Figure 3 It is a left view structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0022] Figure 4 It is a left view sectional structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0023] Figure 5 It is a bottom view structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0024] Figure 6 It is a rear view structural schematic diagram of the rear door structure according to one or more embodiments of the present invention;

[0025] The components represented by the reference numerals in the figures are as follows:

[0026] 1. Main board; 11. Bending part; 2. Left side plate; 3. Right side plate; 4. Upper cross beam; 5. Lower cross beam; 6. Left rear side plate; 7. Right rear side plate; 8. Lower support plate; 9. Shock pad. Detailed implementation mode

[0027] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the attached drawings in this specific embodiment. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this patent.

[0028] Embodiment 1

[0029] In a typical implementation mode of the present utility model, as Figures 1 - 6 shown, a rear door structure is proposed, including: main board 1, left side plate 2, right side plate 3, upper cross beam 4, and lower cross beam 5. The left side plate 2 is fixedly arranged on the left side of the main board 1 by welding, the right side plate 3 is fixedly arranged on the right side of the main board 1 by welding, the upper cross beam 4 is fixedly arranged on the upper part of the front side of the main board 1 by welding, and the lower cross beam 5 is fixedly arranged on the lower part of the front side of the main board 1 by welding.

[0030] As Figure 4 shown, a bending part 11 is provided at the middle position of the main board 1. The bending part 11 extends along the length direction of the main board 1, and the cross section of the bending part 11 is V-shaped. It is formed by three bending processes. Compared with the arc structure, the bending process is less, the processing speed is fast, and the processing accuracy is more convenient to control. The production quality and production efficiency are high. Through the setting of the bending part 11, the overall strength of the main board 1 itself can be enhanced, the number of reinforcing beams of the main board 1 is reduced, and thus the welding amount is reduced, the risk of welding deformation and the accumulation of welding stress are reduced, raw materials and welding materials are saved, the production cycle is shortened, the production efficiency is improved, and the weight of the rear door is reduced.

[0031] In order to further reduce the overall weight of the rear door, the left vertical beam and the right vertical beam are cancelled, and the left side plate 2 and the right side plate 3 are fixedly arranged on the left and right sides of the main board 1. The left side plate 2 and the right side plate 3 are both wear-resistant reinforcement plate structures, which simplifies the structure and reduces the weight.

[0032] The lengths of the upper crossbeam 4 and the lower crossbeam 5 are the same as the length of the main board 1, that is, the left and right ends of the upper crossbeam 4 and the lower crossbeam 5 are flush with the left and right sides of the main board 1. The left side plate 2 fixedly connects the left side of the main board 1 to the left ends of the upper crossbeam 4 and the lower crossbeam 5, and the right side plate 3 fixedly connects the right side of the main board 1 to the right ends of the upper crossbeam 4 and the lower crossbeam 5, so that the main board 1, the left side plate 2, the right side plate 3, the upper crossbeam 4 and the lower crossbeam 5 are connected as a whole, ensuring the strength of the whole.

[0033] On the back of the main board 1, a left rear side plate 6 and a right rear side plate 7 are fixedly arranged by welding, as Figure 6 shown. Both the left rear side plate 6 and the right rear side plate 7 are L-shaped plates. The left rear side plate 6 is fixedly arranged on the left side of the back of the main board 1, and the right rear side plate 7 is fixedly arranged on the right side of the back of the main board 1.

[0034] Specifically, the left rear side plate 6 is fixedly connected to the left side plate 2 and the left side of the back of the main board 1, and the right rear side plate 7 is fixedly connected to the right side plate 3 and the right side of the back of the main board 1, so as to realize the overall fixed connection of the left rear side plate 6, the right rear side plate 7, the main board 1, the left side plate 2 and the right side plate 3. The bent section of the L-shaped plate is located at the lower part of the rear door for force transmission.

[0035] The use of the left side plate 2, the right side plate 3, the left rear side plate 6 and the right rear side plate 7, compared with the use of the left vertical beam and the right vertical beam, while ensuring the overall strength of the rear door, effectively reduces the overall weight of the rear door, reduces the production cost, and is convenient for installation and use.

[0036] On the back of the main board 1, a lower support plate 8 is also fixedly arranged by welding. The lower support plate 8 is located at the lower part of the back of the main board 1. The cross-section of the lower support plate 8 is L-shaped. The lower support plate 8 can strengthen the structural strength of the rear door, making it more stable when bearing the weight of goods and the impact during transportation. At the same time, it can reduce the shaking and jitter of the rear door during the opening and closing process, ensure that the rear door can reach the predetermined position smoothly and accurately when opening, so as to ensure the efficiency and safety of the unloading process. A shock pad 9 is fixedly arranged at the bottom of the lower support plate 8 to reduce the vibration and impact on the rear door during the loading and unloading process and extend the service life of the rear door.

[0037] Embodiment 2

[0038] In a typical implementation manner of the present utility model, a dump truck is proposed, which adopts the rear door structure mentioned in Embodiment 1. The rear door of the dump truck is rotatably installed on the side plate of the carriage body through a hinge.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backdoor structure, comprising: A main board (1) is characterized in that a bending portion (11) is provided at the middle position of the main board (1), the cross section of the bending portion (11) is V-shaped, and the bending portion (11) extends along the length direction of the main board (1); an upper crossbeam (4) and a lower crossbeam (5) are both fixedly arranged on the front side of the main board (1); a left side plate (2) and a right side plate (3) are fixedly arranged on the left and right sides of the main board (1); and the left side plate (2) and the right side plate (3) are both fixedly connected to the main board (1), the upper crossbeam (4), and the lower crossbeam (5).

2. A backdoor structure according to claim 1, characterized in that: The lengths of the upper crossbeam (4) and the lower crossbeam (5) are the same as the length of the main board (1).

3. A backdoor structure according to claim 1, characterized in that: A left rear side plate (6) and a right rear side plate (7) are fixedly provided on the back of the main board (1); the left rear side plate (6) is fixedly connected to the left side plate (2) and the left side of the back of the main board (1); and the right rear side plate (7) is fixedly connected to the right side plate (3) and the right side of the back of the main board (1).

4. A backdoor structure according to claim 1, characterized in that: The left rear side plate (6) and the right rear side plate (7) are both L-shaped plates.

5. A backdoor structure according to claim 1, characterized in that: A lower support plate (8) is fixedly provided at the lower part of the back side of the main board (1), and the cross section of the lower support plate (8) is L-shaped.

6. A backdoor structure according to claim 1, characterized in that: A shock-absorbing pad (9) is fixedly provided on the bottom of the lower support plate (8).

7. A dump truck, characterized in that: A backdoor structure as described in any one of claims 1-6 is adopted.

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