Rear guardrail device of mining dump truck

Abstract

The utility model relates to the technical field of vehicle rear guardrails, in particular to a rear guardrail device of a mining dump truck, which comprises a protective beam, two ends of the protective beam are connected with connecting plates, the top ends of the connecting plates are connected with the bottom of a truck frame, the two connecting plates are identical in structure and are arranged in parallel, and the edges of the connecting plates are bent towards one side far away from the protective beam. The bottom end of the connecting plate inclines in the direction away from the vehicle head. The cross section of the protective beam is G-shaped, double-G-shaped, C-shaped or double-C-shaped, or the protective beam is a rectangular profile. The overall structure is simple and light, machining is easy, assembling is convenient, the structural strength is high, and the impact resistance is high.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle rear guardrails, in particular to a rear guardrail device for a mining dump truck. Background Art

[0002] The vehicle rear guardrail device, as an indispensable safety component of a mining dump truck, has the core function of providing a solid protective barrier for the vehicle's rear axle and brake air chamber to resist various unexpected impacts and collisions under harsh working conditions.

[0003] In the current market environment, the rear guardrail design of most mining dump trucks generally adopts a more traditional structural form, that is, a combination of connecting plates on both sides and welded round pipes. Although this design meets the basic protection needs to a certain extent, its inherent problems and limitations are becoming increasingly prominent.

[0004] Specifically, the connecting plates on both sides are often welded with reinforcement ribs inside or outside to enhance the strength and rigidity of the overall structure in order to cope with the complex and changeable working environment of the mine. However, this practice not only increases the types and quantities of materials in the manufacturing process, making supply chain management more complicated, but also directly increases production costs. In addition, a large number of welding operations are not only time-consuming and labor-intensive, but may also introduce potential safety hazards due to unstable welding quality.

[0005] Although the welded round tubes as the main structure are manufactured in accordance with national standards and have a certain impact resistance, their specifications need to be customized according to the specific vehicle model and protection requirements, which undoubtedly increases the difficulty and cost of design and production. More importantly, during the frequent heavy-load operations of mining dump trucks, the round tubes are easily bent and deformed by the strong impact from the rear, which in turn affects the protection efficiency of the entire rear guardrail.

[0006] What is more serious is that, since the overall assembly structure of the current rear guardrail is mostly designed to be vertically downward, when impacted, this structure tends to sag inward along the direction of the vehicle's travel. This deformation trend directly threatens the safety of the rear axle and brake chamber. Once these key components are damaged, it will not only affect the vehicle's driving stability and braking performance, but may also cause serious safety accidents, causing immeasurable damage to the driver and the surrounding environment.

[0007] As described above, the rear guardrail structure in the prior art has the problems of high welding manufacturing cost, easy bending and deformation, heavy structure, and low actual assembly efficiency. Utility Model Content

[0008] To solve the technical problems of the existing rear guardrail structure, such as high welding manufacturing cost, easy bending deformation, heavy structure, and low actual assembly efficiency, the utility model provides a rear guardrail device for a mining dump truck.

[0009] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0010] A rear guardrail device for a mining dump truck includes a protection beam. Both ends of the protection beam are connected with connecting plates. The top ends of the connecting plates are connected to the bottom of the vehicle frame. The two connecting plates have the same structure and are arranged in parallel. The edges of the connecting plates are bent towards the side away from the protection beam, and the bottom ends of the connecting plates are inclined towards the direction away from the vehicle head; the cross-section of the protection beam is in the shape of "G", double "G", "C", or double "C", or the protection beam is a rectangular profile.

[0011] Adopting the above structural scheme, first, the connecting plates adopt a structure with outward bending to increase their own strength. The structure is simple and lightweight, the assembly efficiency is high, and the bending process has high processing efficiency and low cost, which is conducive to shortening the manufacturing cycle of the connecting plates and reducing the processing cost of the connecting plates. Second, the bottom ends of the connecting plates are inclined towards the direction away from the vehicle head, making the overall structure of the rear guardrail device inclined in the opposite direction of the vehicle's travel. When the vehicle is impacted from the rear, it will play a huge buffering role and can exert the maximum protection effect. Third, the cross-section of the protection beam is in the shape of "G", double "G", "C", or double "C", or the protection beam is a rectangular profile, which can not only increase the contact area between the protection beam and the connecting plates on both sides, but also improve the anti-impact ability and thus reduce bending deformation. Moreover, there is no need to select the specifications of the round tubes separately. The structure is simple and lightweight, and the manufacturing and processing efficiency of the protection beam can be greatly improved through the bending process.

[0012] As a preferred implementation scheme of a rear guardrail device for a mining dump truck, a plurality of bolt holes penetrating the connecting plates are opened on the plate surface of the connecting plates, and a connecting bolt is installed in each bolt hole. The connecting plates are connected to the vehicle frame through a plurality of connecting bolts.

[0013] Adopting the above structural scheme, the connecting plates are assembled with the vehicle frame through connecting bolts, and the connection structure is simple and has high strength.

[0014] As a preferred implementation scheme of a rear guardrail device for a mining dump truck, the connecting plates are welded to the protection beam.

[0015] Adopting the above structural scheme, the connecting plates and the protection beam are integrated into one body, improving the connection strength, with a simple structure and strong impact resistance.

[0016] As a preferred implementation scheme of a rear guardrail device for a mining dump truck, a locking support is installed on the side of the connecting plate. One end of the locking support is connected to one end of a locking chain, and the other end of the locking chain is connected to the hook of the locking mechanism of the cargo box rear door.

[0017] With the above structural solution, the locking chain connects the locking support and the locking hook of the locking mechanism on the rear door of the cargo box. After the locking mechanism of the rear door of the cargo box is locked, the connection between the connecting plate and the rear door of the cargo box can not only enhance the impact resistance of the connecting plate, but also further improve the locking force of the locking hook and reduce the bounce of the rear door of the cargo box.

[0018] As a preferred implementation of the rear guardrail device of a mining dump truck, the locking support is located on the side of the connecting plate away from the guard beam.

[0019] As a preferred implementation of the rear guardrail device of a mining dump truck, the connecting plate is welded to the locking support.

[0020] With the above structural solution, the connecting plate and the locking support are integrated into one body, which improves the connection strength, has a simple structure and strong impact resistance.

[0021] As a preferred implementation of the rear guardrail device of a mining dump truck, the locking support and the locking chain are connected by a chain connecting rod. The locking chain includes multiple chain links. The locking support is provided with an installation hole. One end of the chain connecting rod is provided with a connection hole. The chain link of the locking chain passes through the connection hole. The other end of the chain connecting rod is a connection screw. The connection screw penetrates into the installation hole of the locking support, and a fastening nut is threadedly installed on the connection screw.

[0022] With the above structural solution, one section of the locking chain is inserted into the connection hole, the connection screw is inserted into the installation hole, and the fastening nut is screwed onto the connection screw. After the fastening nut is tightened, the chain connecting rod can firmly connect the locking support and the locking chain. The structure is simple and the connection is reliable.

[0023] The beneficial effects of the present utility model include:

[0024] First, the connecting plate adopts a structure bent outward to increase its own strength. The structure is simple and light, the assembly efficiency is high, and the processing efficiency of the bending process is high and the cost is low, which is beneficial to shortening the manufacturing cycle of the connecting plate and reducing the processing cost of the connecting plate.

[0025] Second, the bottom end of the connecting plate is inclined away from the head of the vehicle, so that the overall structure of the rear guardrail device is inclined in the opposite direction of the vehicle's travel. When the vehicle is impacted from the rear, it will play a huge buffering role and can play the maximum protection role.

[0026] Third, the cross-section of the guard beam is "G" shaped, double "G" shaped, "C" shaped or double "C" shaped, or the guard beam is a rectangular profile, which can not only increase the contact area between the guard beam and the two side connecting plates, but also improve the impact resistance and reduce the bending deformation. Moreover, there is no need to separately select the specifications of the round tube. The structure is simple and light, and the manufacturing and processing efficiency of the guard beam can be greatly improved through the bending process. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solution of the present utility model, the drawings required in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is a three-dimensional structure schematic diagram of the first perspective of a rear guardrail device of a mining dump truck in the specific embodiment of the present utility model;

[0029] Figure 2 It is a three-dimensional structure schematic diagram of the second perspective of a rear guardrail device of a mining dump truck in the specific embodiment of the present utility model;

[0030] Figure 3 It is a three-dimensional structure schematic diagram after installation of a rear guardrail device of a mining dump truck in the specific embodiment of the present utility model;

[0031] Figure 4 It is a side structure schematic diagram after installation of a rear guardrail device of a mining dump truck in the specific embodiment of the present utility model.

[0032] List of Components and Reference Numerals:

[0033] 1. Protection beam; 2. Connecting plate; 21. Flange; 3. Locking support; 4. Locking chain; 41. Link; 5. Lock hook; 6. Bolt hole; 7. Mounting hole. Detailed Embodiment

[0034] 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 drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0035] Refer to Figures 1-4, in this embodiment, a rear guardrail device for a mining dump truck is proposed, which includes a guard beam 1. The cross-section of the guard beam 1 is in the shape of a "G". Both ends of the guard beam 1 are connected with connecting plates 2. The connecting plates 2 are welded to the guard beam 1, and the top ends of the connecting plates 2 are connected to the bottom of the vehicle frame. Specifically, a number of bolt holes 6 penetrating the connecting plates 2 are formed on the plate surfaces of the connecting plates 2. A connecting bolt is installed in each bolt hole 6, and the connecting plates 2 are connected to the vehicle frame through a number of connecting bolts. The bottom ends of the connecting plates 2 are inclined away from the vehicle head. The two connecting plates 2 have the same structure and are arranged in parallel. The edges of the connecting plates 2 are bent away from the guard beam 1 to form flanges 21.

[0036] A locking support 3 is installed on the side surface of the connecting plate 2. The connecting plate 2 is welded to the locking support 3. The locking support 3 is located on the side of the connecting plate 2 away from the guard beam 1. The locking support 3 is provided with an installation hole 7. One end of the locking support 3 is connected to one end of a locking chain 4. The locking support 3 and the locking chain 4 are connected through a chain connecting rod. The locking chain 4 includes a plurality of chain links 41. The plurality of chain links 41 are buckled one by one corresponding to each other. One end of the chain connecting rod is provided with a connecting hole. The chain link 41 of the locking chain 4 passes through the connecting hole. The other end of the chain connecting rod is a connecting screw. The connecting screw penetrates into the installation hole 7 of the locking support 3. A fastening nut is threadedly installed on the connecting screw. The other end of the locking chain 4 is connected to the locking hook 5 of the cargo box rear door locking mechanism. Pass a section of the locking chain 4 into the connecting hole, insert the connecting screw into the installation hole 7, and screw the fastening nut onto the connecting screw. After screwing the fastening nut tightly, the chain connecting rod can firmly connect the locking support 3 and the locking chain 4. The structure is simple and the connection is reliable.

[0037] The principle of this embodiment is as follows:

[0038] The connecting plate 2 adopts a structure bent outward to increase its own strength. The structure is simple and light, the assembly efficiency is high, and the processing efficiency of the bending process is high and the cost is low, which is beneficial to shortening the manufacturing cycle of the connecting plate 2 and reducing the processing cost of the connecting plate 2.

[0039] The bottom end of the connecting plate 2 is inclined away from the vehicle head, making the overall structure of the rear guardrail device inclined in the opposite direction of the vehicle travel. When the vehicle is impacted from the rear, it will play a huge buffering role and can play the maximum protective role.

[0040] The cross-section of the guard beam 1 is in the shape of a "G", double "G", "C" or double "C", or the guard beam 1 is a rectangular profile, which can not only increase the contact area between the guard beam 1 and the two side connecting plates 2, but also improve the impact resistance ability to reduce bending deformation, and there is no need to select the round tube specifications separately. The structure is simple and light, and the manufacturing and processing efficiency of the guard beam 1 can be greatly improved through the bending process.

[0041] The locking chain 4 connects the locking support 3 and the locking hook 5 of the locking mechanism on the rear door of the cargo box. After the locking mechanism of the rear door of the cargo box is locked, the connecting plate 2 is connected to the rear door of the cargo box, which can not only enhance the impact resistance of the connecting plate 2, but also further improve the locking force of the locking hook 5 and reduce the bounce of the rear door of the cargo box.

[0042] In other embodiments, the cross-section of the protective beam 1 can also be double "G" shape, "C" shape or double "C" shape, or the protective beam 1 is a rectangular profile.

[0043] In this embodiment, the locking chain 4 is connected to the position near the bottom of the locking hook 5 of the locking mechanism on the rear door of the cargo box. The tighter the locking chain 4 is pulled, the tighter the upper end of the locking hook 5 is buckled to the rear door of the cargo box. As Figures 3-4 shown, the locking mechanism on the rear door of the cargo box in this embodiment is a common hook-type locking mechanism in the prior art and will not be elaborated in this application.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious 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 invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rear guardrail device for a mining dump truck, comprising a protection beam (1), both ends of the protection beam (1) are connected to connecting plates (2), the top of the connecting plate (2) is connected to the bottom of the frame, and is characterized in that: The two connecting plates (2) have the same structure and are arranged in parallel, the edge of the connecting plate (2) is bent towards a side away from the protection beam (1), and the bottom end of the connecting plate (2) is inclined towards a direction away from the front of the vehicle; the cross section of the protection beam (1) is a "G" shape, a double "G" shape, a "C" shape or a double "C" shape, or the protection beam (1) is a rectangular profile.

2. A rear guardrail device for a mining dump truck according to claim 1, characterized in that: A plurality of bolt holes (6) penetrating the connecting plate (2) are formed on the plate surface of the connecting plate (2), a connecting bolt is installed in each bolt hole (6), and the connecting plate (2) is connected to the vehicle frame via the plurality of connecting bolts.

3. The rear guardrail device of a mining dump truck according to claim 1, characterized in that: The connecting plate (2) is connected to the protection beam (1) by welding.

4. The rear guardrail device of a mining dump truck according to claim 1, characterized in that: A locking support (3) is installed on the side of the connecting plate (2), the locking support (3) is connected to one end of a locking chain (4), and the other end of the locking chain (4) is connected to a lock hook (5) of a locking mechanism of a rear door of the cargo box.

5. A rear guardrail device for a mining dump truck according to claim 4, characterized in that: The locking support (3) is located on a side of the connecting plate (2) away from the protection beam (1).

6. A rear guardrail device for a mining dump truck according to claim 4, characterized in that: The connecting plate (2) is connected to the locking support (3) by welding.

7. The rear guardrail device for a mining dump truck according to claim 4, characterized in that: The locking support (3) is connected to the locking chain (4) via a chain connecting rod. The locking chain (4) comprises a plurality of chain links (41) which are linked one by one in a one-to-one manner. The locking support (3) is provided with a mounting hole (7). One end of the chain connecting rod is provided with a connecting hole. The chain link (41) of the locking chain (4) passes through the connecting hole. The other end of the chain connecting rod is a connecting screw. The connecting screw passes through the mounting hole (7) of the locking support (3). A fastening nut is threadedly mounted on the connecting screw.

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