Cross-shaped reinforcing structure at tail part of auxiliary frame of dumper

Abstract

The utility model discloses a cross-shaped reinforcing structure at the tail part of an auxiliary frame of a dumper, which relates to the field of the dumper and comprises two auxiliary frame longitudinal beams, a plurality of auxiliary frame cross beams are fixedly arranged between the two auxiliary frame longitudinal beams, the plurality of auxiliary frame cross beams are uniformly distributed at equal intervals, and a turnover shaft is fixedly arranged at the tail parts of the two auxiliary frame longitudinal beams; a cross-shaped reinforcing fork is fixedly arranged between the two auxiliary frame longitudinal beams and close to one side of the turnover shaft, and the cross-shaped reinforcing fork is fixedly connected with the adjacent auxiliary frame cross beam and the turnover shaft. According to the utility model, the longitudinal beam at the tail part of the auxiliary frame, the cross beam of the auxiliary frame and the turnover shaft are welded together, so that the bearing load of the tail part of the auxiliary frame can be uniformly distributed, the overall rigidity of the auxiliary frame structure is improved, and the deformation or weld cracking of the auxiliary frame caused by overweight bearing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of dump trucks, specifically to a cross-shaped reinforcement structure at the rear of the subframe of a dump truck. Background Technology

[0002] In the dump truck industry, the reliability of the subframe structure directly affects the safety and service life of the vehicle under heavy load conditions.

[0003] Traditional dump trucks typically use I-beam or V-beam structures at the rear. While these structures have a certain load-bearing capacity, they reveal significant structural defects when dealing with heavy cargo transportation and unloading scenarios. When a dump truck is loaded with a large amount of cargo, especially under the torsional moment generated by the lifting of the cargo box during unloading, the rear of the subframe must withstand complex alternating loads. Due to the limited torsional stiffness of the I-beam or V-beam structure, the subframe is prone to torsional deformation, causing the area near the tipping axle to become a stress concentration point. The welds in this area gradually develop fatigue cracks due to long-term overload stress, and may even crack. This not only affects the normal operating efficiency of the vehicle but may also cause safety hazards such as cargo box tilting and cargo spillage, increasing maintenance costs and downtime.

[0004] To address this, a cross-shaped reinforcement structure for the rear of the subframe of a dump truck is proposed. Utility Model Content

[0005] In view of the problems existing in the current subframes of dump trucks, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a cross-shaped reinforcement structure at the rear of the subframe of a dump truck, which solves the problems raised in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A cross-shaped reinforcement structure at the rear of a dump truck subframe includes two subframe longitudinal beams, multiple subframe crossbeams fixed between the two subframe longitudinal beams, the multiple subframe crossbeams being evenly distributed at equal intervals, and a tilting shaft fixed at the rear of the two subframe longitudinal beams.

[0009] A cross-shaped reinforcing fork is fixedly provided between the two subframe longitudinal beams and on the side near the tilting shaft, and the cross-shaped reinforcing fork is fixedly connected to the adjacent subframe crossbeam and tilting shaft.

[0010] Preferably, the cross-shaped reinforcing fork includes a long fork, a first short fork, and a second short fork, the first short fork and the second short fork being inserted end to end, the first short fork and the second short fork being distributed in a cross shape with the long fork, and a fixing cover plate being provided at the connection between the first short fork and the second short fork and the long fork.

[0011] Preferably, the long fork, the first short fork, and the second short fork are all U-shaped stamped parts.

[0012] Preferably, a support frame is provided at the end of each of the two subframe longitudinal beams away from the tilting axis.

[0013] Furthermore, the support frame adopts a telescopic frame structure.

[0014] Preferably, each of the two subframe longitudinal beams is symmetrically fixed with two mounting supports on its sidewalls.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. Enhance structural strength: Connect the longitudinal beams on both sides of the subframe to distribute the load and improve overall rigidity.

[0017] 2. Stabilize the vehicle body: suppress the twisting and deformation of the subframe, and ensure stability during driving and unloading. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 This is a perspective view of the cross-shaped reinforcing fork of this utility model;

[0022] Figure 4 This is a perspective view of the long fork of this utility model;

[0023] Figure 5 This is a perspective view of the first short fork of this utility model;

[0024] Figure 6 This is a perspective view of the second short fork of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Subframe longitudinal beam; 2. Subframe crossbeam; 3. Tilting axle; 4. Cross-shaped reinforcing fork; 41. Long fork; 42. First short fork; 43. Second short fork; 44. Fixed cover plate; 5. Support frame; 6. Mounting bracket. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-6 The diagram shows a cross-shaped reinforcement structure at the rear of a dump truck subframe, comprising two subframe longitudinal beams 1, with multiple subframe crossbeams 2 fixed between the two subframe longitudinal beams 1. The multiple subframe crossbeams 2 are evenly distributed at equal intervals. A tilting shaft 3 is fixed at the rear of the two subframe longitudinal beams 1. The tilting shaft 3 is fixed to the rear of the two subframe longitudinal beams 1 and serves as a fulcrum for tilting the cargo box. During unloading, it bears the torsional torque generated by lifting the cargo box and transmits the torque to the rear of the subframe longitudinal beams 1.

[0029] A cross-shaped reinforcing fork 4 is fixedly installed between the two subframe longitudinal beams 1 and on the side near the tilting shaft 3. The cross-shaped reinforcing fork 4 is fixedly connected to the adjacent subframe crossbeam 2 and the tilting shaft 3. The cross-shaped reinforcing fork 4 includes a long fork 41, a first short fork 42 and a second short fork 43. The first short fork 42 and the second short fork 43 are inserted end to end. The first short fork 42 and the second short fork 43 are arranged in a cross shape with the long fork 41. A fixing cover plate 44 is provided at the connection between the first short fork 42 and the second short fork 43 and the long fork 41. The long fork 41, the first short fork 42 and the second short fork 43 are all U-shaped stamped parts. When the rear of the subframe is subjected to torsional moment, the cross-shaped reinforcing fork 4 decomposes the moment into lateral and longitudinal components through the cross rigid structure, avoiding stress concentration in one direction.

[0030] Support frames 5 are provided at the ends of the two subframe longitudinal beams 1 away from the tipping shaft 3. The support frames 5 adopt a telescopic frame structure, and the support height can be adjusted according to the tilt angle of the cargo box during unloading to help share the load at the tail of the subframe longitudinal beams 1 and reduce the stress peak in the tipping shaft 3 area.

[0031] Two mounting supports 6 are symmetrically fixed to the side walls of the two subframe longitudinal beams 1, which are used to connect the cargo box hydraulic lifting device or other accessories, and the force is reliably transmitted by bolt fixing.

[0032] Working principle: The two subframe longitudinal beams 1 are fixedly connected by multiple equally spaced subframe crossbeams 2 to form an integral frame to jointly bear the vertical load of the cargo box and goods. The subframe crossbeams 2 evenly distribute the force on the two subframe longitudinal beams 1, reducing the local load concentration of a single longitudinal beam; the tilting shaft 3 is fixed to the tail of the two subframe longitudinal beams 1, serving as the fulcrum for tilting the cargo box. During unloading, it bears the torsional moment generated by lifting the cargo box and transmits the moment to the subframe longitudinal beams 1 and the reinforcing structure.

[0033] The cross-shaped reinforcing fork 4 consists of a long fork 41, a first short fork 42, and a second short fork 43, arranged in a cross shape and connected by a fixed cover plate 44. The long fork 41 extends axially along the longitudinal beam 1, connecting the adjacent subframe crossbeam 2 and the tilting shaft 3. The first short fork 42 and the second short fork 43 are perpendicular to the long fork 41, extending to the longitudinal beams 1 on both sides and fixed to the side walls of the longitudinal beams. When the rear of the subframe is subjected to torsional moment, the cross-shaped reinforcing fork 4 decomposes the moment into lateral and longitudinal components through the rigid structure of the cross, avoiding stress concentration in one direction. The long fork 41, the first short fork 42, and the second short fork 43 are all U-shaped stamped parts, forming rigid cavities through bending processes to improve the bending stiffness of the structure and suppress the torsional deformation of the subframe longitudinal beam 1. The cross-shaped reinforcing fork 4 is directly welded to the tilting shaft 3 to ensure that the moment is evenly distributed to the overall subframe frame.

[0034] A telescopic support frame 5 is installed at the end of the subframe longitudinal beam 1 away from the tipping shaft 3. During unloading, the support height can be adjusted according to the tilt angle of the cargo box to help share the load at the rear of the subframe longitudinal beam 1 and reduce the stress peak in the tipping shaft 3 area. The mounting bracket 6 on the side wall of the subframe longitudinal beam 1 is used to connect the hydraulic lifting device of the cargo box or other accessories. The force is reliably transmitted by bolt fixing, avoiding the weakening of strength caused by directly drilling holes in the longitudinal beam body.

[0035] When loading heavy cargo, the cross-shaped reinforcing fork 4 reduces the deformation of the rear of the subframe through rigid connection and torque distribution, preventing the weld near the tipping shaft 3 from cracking due to excessive twisting. During unloading, the cross-shaped reinforcing fork 4, together with the subframe crossbeam 2 and the subframe longitudinal beam 1, forms a closed anti-torsional frame, suppressing the lateral sway of the subframe when the cargo box is lifted, ensuring the stability of the vehicle body during unloading, and reducing the risk of cargo spillage.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cross-shaped reinforcing structure at the rear of a dump truck subframe, comprising two subframe longitudinal beams (1), characterized in that: Multiple subframe crossbeams (2) are fixedly provided between the two subframe longitudinal beams (1), and the multiple subframe crossbeams (2) are evenly distributed at equal intervals. A flipping shaft (3) is fixedly provided at the tail of the two subframe longitudinal beams (1). A cross-shaped reinforcing fork (4) is fixedly provided between the two subframe longitudinal beams (1) and on one side near the tilting shaft (3), and the cross-shaped reinforcing fork (4) is fixedly connected to the adjacent subframe cross beam (2) and tilting shaft (3).

2. The cross-shaped reinforcing structure at the rear of the subframe of the dump truck according to claim 1, characterized in that: The cross-shaped reinforcing fork (4) includes a long fork (41), a first short fork (42) and a second short fork (43). The first short fork (42) and the second short fork (43) are inserted end to end. The first short fork (42) and the second short fork (43) are arranged in a cross shape with the long fork (41), and a fixing cover plate (44) is provided at the connection between the first short fork (42) and the second short fork (43) and the long fork (41).

3. The cross-shaped reinforcing structure at the rear of the subframe of the dump truck according to claim 2, characterized in that: The long fork (41), the first short fork (42), and the second short fork (43) are all U-shaped stamped parts.

4. The cross-shaped reinforcing structure at the rear of the subframe of the dump truck according to claim 1, characterized in that: A support frame (5) is provided at one end of each of the two subframe longitudinal beams (1) away from the tilting shaft (3).

5. The cross-shaped reinforcing structure at the rear of the subframe of the dump truck according to claim 4, characterized in that: The support frame (5) adopts a telescopic frame structure.

6. The cross-shaped reinforcing structure at the rear of the subframe of the dump truck according to claim 1, characterized in that: Two mounting supports (6) are symmetrically fixed to the side walls of the two subframe longitudinal beams (1).

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