Vehicle rear protection device and engineering machine

Abstract

The utility model relates to a kind of vehicle rear protective device and engineering machinery, the vehicle rear protective device includes the support of being fixed in the tail of vehicle frame, first support with support hinged connection, second support hinged with first support, transverse rod hinged with second support;The support, first support and second support have two sets and symmetrically set in the tail of vehicle frame, the transverse rod is hinged with two second supports;The side of first support hinged end of support is provided with baffle, prevents first support from rotating to the direction where baffle is provided;The end of first support and second support hinged is provided with straight limiting hole and folding limiting hole;The second support is provided with positioning through-hole close to first support hinged position;The engineering machinery installs the vehicle rear protective device of the utility model.The utility model is simple in structure, and adjusting operation is convenient and fast, and adjusting range is big, and it does not affect the normal work of engineering machinery.

Description

Technical Field

[0001] This utility model relates to a rear protection device for vehicles and engineering machinery, belonging to the field of engineering machinery technology. Background Technology

[0002] Rear bumper guards are structures that provide effective protection across the entire width of the rear of a vehicle in the event of a rear-end collision, minimizing the damage from the accident. Existing rear bumper guards typically consist of crossbars and connecting brackets, attached to the chassis side beams or other vehicle structural components, and are usually fixed at the rear of the vehicle. This common type of rear bumper guard is entirely immovable, fixed to the chassis beam or subframe, and cannot be adjusted. This causes significant inconvenience during vehicle operation or driving. For example, if there is an obstacle behind the vehicle, the rear bumper guard may interfere with its movement; or when encountering steep or undulating roads, the rear bumper guard may scrape the ground, affecting the vehicle's traction.

[0003] For other existing vehicle rear protection devices with adjustable structures, some require the crossbar to be flipped up. This structure is greatly affected by the space at the rear of the vehicle. If there are other structural components at the rear of the vehicle, they will prevent the crossbar from flipping up and rotating, which limits the space for actual application. Some require the bolts or pins between the crossbar and the connecting bracket to be removed first, and then reassembled and fixed. The structure is relatively complex, requires more effort to operate, and is inconvenient to use. Some crossbars have adjustable parts, but the adjustment distance of these parts is generally small, and the adjustable range is limited.

[0004] Therefore, there is an urgent need for a vehicle rear protection device and engineering machinery that is simple in structure, easy and quick to adjust, has a large adjustment range, and does not affect the normal operation of engineering machinery. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a vehicle rear protection device and engineering machinery that is simple in structure, convenient and quick to adjust, has a large adjustment range, and does not affect the normal operation of engineering machinery.

[0006] The purpose of this utility model is achieved as follows: A rear protective device for a vehicle includes a support fixed to the rear of the vehicle frame, a first bracket hinged to the support, a second bracket hinged to the first bracket, and a crossbar hinged to the second bracket; the support, the first bracket, and the second bracket are two sets and symmetrically arranged at the rear of the vehicle frame, and the crossbar is hinged to the two second brackets. A baffle is provided on the side of the hinged end of the first bracket and the support to prevent the first bracket from rotating in the direction of the baffle; the end of the first bracket and the second bracket that is hinged is provided with a straightening limiting hole and a folding limiting hole; The second bracket has a positioning through hole near the hinge position of the first bracket, and a movable pin is inserted into the positioning through hole; when the positioning through hole is aligned with the extension limit hole, the crossbar is in the extended state; when the positioning through hole is aligned with the folding limit hole, the crossbar is in the folded state.

[0007] Furthermore, the hinge points between the support, the first bracket, the second bracket, and the crossbar are all movably connected by pins and cotter pins.

[0008] Furthermore, a spring pin is inserted into the movable pin to prevent it from slipping out.

[0009] Furthermore, a handle is provided on the movable pin for easy disassembly and assembly.

[0010] Furthermore, the straightening limiting hole is located on the central axis of the first bracket, and the folding limiting hole is located on the side of the central axis of the first bracket.

[0011] Furthermore, the baffle is located inside the two sets of first brackets, the folding limiting hole is located inside the central axis of the two sets of first brackets, and the two sets of first brackets and second brackets are folded inward into a rhombus shape.

[0012] Furthermore, the baffle is located on the outside of the two sets of first brackets, the folding limiting hole is located on the outside of the central axis of the two sets of first brackets, and the two sets of first brackets and second brackets are folded outward into an X shape.

[0013] Furthermore, an engineering machine has a rear protective device for any of the aforementioned vehicles installed at the rear of its frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model discloses a vehicle rear protection device. A first bracket has an extension limit hole and a folding limit hole, while a second bracket has a corresponding positioning through hole. By cooperating with the extension and folding limit holes and inserting a movable pin, the first and second brackets can switch between extended and folded states. This allows the crossbar and the two brackets to form a foldable mechanism with a scissor structure, enabling a wide range of extension and retraction of the crossbar. The overall device has a simple structure, convenient and quick extension / retraction adjustment, a large adjustment range, and does not affect the normal operation of construction machinery. The engineering machinery of this utility model, when equipped with the aforementioned rear vehicle protection device, not only serves to protect the rear of the vehicle body, but also allows for convenient and flexible folding. The front and rear length of the protection device itself is adjustable, facilitating the adjustment of the internal and external space near the rear vehicle protection device, and enabling convenient operation and maintenance of related components such as hoppers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a vehicle rear protection device according to the present invention. Figure 2 This is a schematic diagram of the bottom structure of a vehicle rear protection device according to the present invention.

[0016] Figure 3 This is a schematic diagram of the folded state of a vehicle rear protection device according to the present invention.

[0017] Figure 4 This is a schematic diagram of the folded state of a vehicle rear protection device according to the present invention.

[0018] Figure 5 This is a schematic diagram of the extended state of a protective device for engineering machinery according to this utility model.

[0019] Figure 6 This is a schematic diagram of the folded state of a protective device for engineering machinery according to this utility model.

[0020] in: Support 1, First bracket 2, Second bracket 3, Crossbar 4, Baffle 5, Straightening limit hole 6, Folding limit hole 7, Positioning through hole 8, Movable pin 9, Pin shaft 10, Cotter pin 11, Spring pin 12, Handle ring 13. Detailed Implementation Example 1

[0021] See Figures 1-3 This utility model relates to a rear protective device for vehicles, comprising a support 1 fixedly mounted at the rear of the vehicle frame, a first bracket 2 hinged to the support 1, a second bracket 3 hinged to the first bracket 2, and a crossbar 4 hinged to the second bracket 3; there are two sets of the support 1, the first bracket 2, and the second bracket 3, which are symmetrically arranged at the rear of the vehicle frame, and the crossbar 4 is hinged to the two second brackets 3; the hinge points between the support 1, the first bracket 2, the second bracket 3, and the crossbar 4 are all movably connected by pins 10 and cotter pins 11; A baffle 5 is provided on the side of the hinged end of the first bracket 2 and the support 1 to prevent the first bracket 2 from rotating in the direction of the baffle 5. In this embodiment, the baffle 5 is provided on the inner side of the two first brackets 2. The end of the first bracket 2 that is hinged to the second bracket 3 is provided with a straightening limiting hole 6 and a folding limiting hole 7. The straightening limiting hole 6 is located on the central axis of the first bracket 2, and the folding limiting hole 7 is located on the side of the central axis of the two sets of first brackets 2. In this embodiment, the folding limiting hole 7 is located on the inner side of the central axis of the two sets of first brackets 2. The second bracket 3 is provided with a positioning through hole 8 near the hinge position of the first bracket 2. A movable pin 9 is inserted into the positioning through hole 8. A handle ring 13 is provided on the movable pin 9 and a spring pin 12 is inserted to facilitate disassembly and assembly and prevent the movable pin 9 from slipping. When the positioning through hole 8 is aligned with the straightening limit hole 6, the crossbar 4 is in the extended state. When the positioning through hole 8 is aligned with the folding limit hole 7, the crossbar 4 is in the folded state. At this time, the two sets of first brackets 2 and second brackets 3 are folded inward into a rhombus shape. This utility model employs a straightening limiting hole 6, a folding limiting hole 7, and a positioning through hole 8 that can be aligned and matched between the first bracket 2 and the second bracket 3, so that the first bracket 2 and the second bracket 3 form a scissor-folding structure, enabling the crossbar 4 to have a telescopic adjustment function with a large adjustment range, flexible folding, simple structure, and convenient operation. Example 2

[0022] See Figure 4 Based on embodiment 1, the baffle 5 is replaced on the outside of the two sets of first brackets 2, and the folding limiting hole 7 is located on the outside of the central axis of the two sets of first brackets 2. At this time, the two sets of first brackets 2 and the second bracket 3 are folded outward into an X shape, which can also meet the telescopic folding requirements of the crossbar 4. Example 3

[0023] See Figures 5-6 The present invention relates to a vehicle rear protection device of embodiment 1 installed at the rear of the vehicle frame. The attached drawings show a concrete pump truck with the vehicle rear protection device of embodiment 1 installed, in both extended and folded states. In addition to concrete pump trucks, it can also be applied to other engineering machinery. Alternatively, the vehicle rear protection device of embodiment 2 with X-folding can also be used. Taking a concrete pump truck as an example, if the pump truck is in motion, such as Figure 5 As shown, the rear protective device of the vehicle needs to function as an anti-drilling and anti-collision device. In this case, the rear protective device should be fixed in the extended position, and the crossbar 4 should be moved to the rearmost end of the device. If the pump truck is in pumping mode, such as... Figure 6As shown, the rear protective device of the vehicle should be retracted as much as possible. In this case, the rear protective device should be fixed in a folded state to leave sufficient space for operation and maintenance at the rear of the vehicle. This allows the mixer truck to easily approach the pump truck's hopper to discharge material. Similarly, when the pump truck is repairing the hopper's conveyor bend, the rear protective device can also be fixed in a folded state to facilitate disassembly and maintenance of the hopper's conveyor pipe and related components. If there is no adjustable rear protective device, pumping can still be performed directly during pumping operations. However, because the rear of the protective device protrudes too much, the mixer truck cannot approach it to discharge material, requiring an extended discharge chute, which is inconvenient and cumbersome to operate.

[0024] The engineering machinery of this patent, equipped with the aforementioned rear protective device, features a horizontally adjustable folding mechanism. Users can easily fold the device without significant effort, greatly enhancing ease of use. After the movable pin 9 is fixed to the corresponding limit hole in the folded state, the rear protective device is guaranteed not to wobble during pump truck operation. Similarly, when a vehicle equipped with this rear protective device is moved within the construction site, switching the device to the folded / retracted state increases the vehicle's departure angle, facilitating passage in poor road conditions.

[0025] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A rear protective device for vehicles, characterized in that: It includes a support (1) fixed to the rear of the vehicle frame, a first bracket (2) hinged to the support (1), a second bracket (3) hinged to the first bracket (2), and a crossbar (4) hinged to the second bracket (3); there are two sets of the support (1), the first bracket (2) and the second bracket (3) and they are symmetrically arranged at the rear of the vehicle frame, and the crossbar (4) is hinged to the two second brackets (3); A baffle (5) is provided on the side of the hinged end of the first bracket (2) and the support (1) to prevent the first bracket (2) from rotating in the direction of the baffle (5); the end of the first bracket (2) and the second bracket (3) is provided with a straightening limiting hole (6) and a folding limiting hole (7). The second bracket (3) is provided with a positioning through hole (8) near the hinge position of the first bracket (2), and a movable pin (9) is inserted in the positioning through hole (8); when the positioning through hole (8) is aligned with the straightening limiting hole (6), the crossbar (4) is in the extended state; when the positioning through hole (8) is aligned with the folding limiting hole (7), the crossbar (4) is in the folded state.

2. The vehicle rear protection device according to claim 1, characterized in that: The hinge points between the support (1), the first bracket (2), the second bracket (3) and the crossbar (4) are all connected by a pin (10) and a cotter pin (11).

3. The vehicle rear protection device according to claim 1, characterized in that: A spring pin (12) is inserted into the movable pin (9) to prevent the movable pin (9) from slipping.

4. The vehicle rear protection device according to claim 1, characterized in that: A handle (13) is provided on the movable pin (9) for easy disassembly and assembly.

5. The vehicle rear protection device according to claim 1, characterized in that: The straightening limiting hole (6) is located on the central axis of the first bracket (2), and the folding limiting hole (7) is located on the side of the central axis of the first bracket (2).

6. The vehicle rear protection device according to claim 1, characterized in that: The baffle (5) is located inside the two sets of first brackets (2), the folding limiting hole (7) is located inside the central axis of the two sets of first brackets (2), and the two sets of first brackets (2) and the second bracket (3) are folded inward into a rhombus shape.

7. The vehicle rear protection device according to claim 1, characterized in that: The baffle (5) is located on the outside of the two sets of first brackets (2), the folding limiting hole (7) is located on the outside of the central axis of the two sets of first brackets (2), and the two sets of first brackets (2) and the second bracket (3) are folded outward into an X shape.

8. An engineering machinery, characterized in that: The rear of the vehicle frame is equipped with any of the rear protection devices of claims 1 to 7.

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