A telescopic tailboard device for a flatbed wrecker

Abstract

The utility model discloses a telescopic tailboard device of flat plate wrecker, including main board, the tail of main board is connected with two telescopic plates of sliding, the inside of telescopic plate is rotatably connected with the folding board for supporting the middle part in telescopic plate after telescopic, one side of folding board is installed with the connecting column, and the connecting column is rotatably connected with the connecting rod. The device is through the inside of telescopic plate rotatory setting folding board, realizes the middle part reinforcing support after telescopic plate extension, when folding board unfolds, its bottom contacts with ground, directly receives the bearing pressure of telescopic plate middle part, avoids the bending of telescopic plate middle part, metal fatigue damage caused by the weight of fault vehicle is relatively big, effectively prevents telescopic track jam, telescopic section can not be retrieved and other failures, and the overall service life of tailboard device is significantly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tow truck technology, specifically to a telescopic tailgate device for a flatbed tow truck. Background Technology

[0002] As a core piece of equipment in the field of roadside assistance, flatbed tow trucks are mainly responsible for the transfer of disabled vehicles, accident vehicles, and illegally parked vehicles. Their tailgate device is a key functional component that ensures the safe and efficient loading and unloading of disabled vehicles onto and off the tow truck flatbed.

[0003] Currently, most mainstream flatbed tow trucks with telescopic tailgates have significant limitations in their structural design. After extension, the central support is lacking, leaving the central area completely suspended without any corresponding reinforcement. When carrying a heavy, faulty vehicle, the central part of the tailgate will deform noticeably. After prolonged and repeated use, the metal substrate of the tailgate is prone to fatigue damage, manifesting as bending deformation in the middle, jamming of the telescopic track, and in severe cases, even preventing the telescopic section from retracting smoothly, directly affecting the tow truck's continuous operating capability.

[0004] To address this, a telescopic tailgate device for a flatbed tow truck is proposed. Summary of the Invention

[0005] The purpose of this utility model is to provide a telescopic tailgate device for a flatbed tow truck to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a telescopic tail plate device for a flatbed clearing vehicle, including a main board, two telescopic plates are slidably connected to the rear of the main board, and a folding plate for supporting the middle part of the telescopic plate after it is extended is rotatably connected to the inner side of the telescopic plate. A connecting post is installed on one side of the folding plate, and a connecting rod is rotatably connected to the connecting post. A protruding post is installed at the end of the connecting rod. Two limiting cylinders are installed on the inner side of the telescopic plate to restrict the position of the protruding post when the folding plate is unfolded and retracted.

[0007] Preferably, a spring is fitted on the outer side of the connecting column to abut and limit the connecting rod.

[0008] Preferably, the telescopic plate has two observation holes on its outer side, and the observation holes correspond to the positions of the limiting cylinder.

[0009] Preferably, the lower surface of the motherboard is symmetrically equipped with slide rails, and the telescopic plate is slidably connected to the inside of the slide rails.

[0010] Preferably, telescopic cylinders are symmetrically mounted on the lower surface of the motherboard, the piston rod of the telescopic cylinder is hinged to one side of the telescopic plate, and the other end of the telescopic cylinder is hinged to the lower surface of the motherboard.

[0011] Preferably, a support roller is installed on the lower surface of the tail of the motherboard.

[0012] Preferably, a limiting block is installed on the inner side of the telescopic plate, the limiting block is located on the outer side of the rotating end of the folding plate, and the limiting block is provided with an adaptation groove adapted to the vertical unfolding of the folding plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This device achieves mid-section reinforcement support after the telescopic plate is extended by rotating and setting a folding plate inside the telescopic plate. When the folding plate is unfolded, its bottom contacts the ground and directly bears the load-bearing pressure in the middle of the telescopic plate, avoiding bending and metal fatigue damage in the middle of the telescopic plate caused by the large weight of the faulty vehicle. It effectively prevents faults such as telescopic track jamming and telescopic section not being able to retract, and significantly extends the overall service life of the tail plate device.

[0014] Meanwhile, the folding plate, together with the connecting column, connecting rod, protrusion and limiting cylinder limiting structure, can accurately fix the folding plate in its stored and unfolded state. The elastic clamping effect of the spring on the outside of the connecting column can prevent the protrusion from accidentally coming off during vehicle bumps or load-bearing, further ensuring the stability of the support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the folding panel of this utility model when it is stored. Figure 4 This is a schematic diagram of the structure of the folding plate of this utility model when unfolded; Figure 5 This is a schematic diagram of the structure of the folding plate of this utility model after it is unfolded and in contact with the ground; Figure 6 This is a schematic diagram of the structure of the limiting block of this utility model.

[0016] In the diagram: 1. Main board; 2. Telescopic plate; 3. Support roller; 4. Slide rail; 5. Telescopic cylinder; 6. Folding plate; 7. Limiting block; 71. Adaptor groove; 8. Connecting column; 9. Spring; 10. Connecting rod; 11. Limiting cylinder; 12. Observation hole; 13. Protruding column. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Please see Figure 1-6 This utility model provides a technical solution: a telescopic tailgate device for a flatbed tow truck, including a main board 1. Two telescopic plates 2 are slidably connected to the rear of the main board 1. The two telescopic plates 2 are symmetrically arranged on both sides of the lower surface of the rear of the main board 1, allowing them to extend or retract. A folding plate 6 is rotatably connected inside the telescopic plate 2. When the telescopic plate 2 extends outward, the folding plate 6 can rotate outward around its rotation axis until it is perpendicular to the ground, supporting the central area of ​​the telescopic plate 2 and preventing the telescopic plate 2 from sagging or bending due to the weight of the disabled vehicle.

[0019] A connecting post 8 is fixedly installed on one side wall of the folding plate 6. The connecting post 8 is cylindrical. A connecting rod 10 is sleeved on the connecting post 8. The connecting rod 10 can rotate freely around the connecting post 8. A protruding post 13 is fixedly connected to the end of the connecting rod 10 away from the connecting post 8. The protruding post 13 is cylindrical and its diameter is slightly smaller than the inner diameter of the subsequent limiting cylinder 11.

[0020] Two limiting cylinders 11 are fixedly installed at intervals on the inner side wall of the telescopic plate 2. The two limiting cylinders 11 correspond to the folded plate 6 in the retracted state and the unfolded state, respectively. When the folded plate 6 is rotated inward to retract, the protrusion 13 can be inserted into one of the limiting cylinders 11. When the folded plate 6 is rotated outward to unfold, the protrusion 13 can be inserted into the other limiting cylinder 11. Through the cooperation of the protrusion 13 and the limiting cylinder 11, the position of the folded plate 6 in different working states is limited, ensuring its working stability.

[0021] like Figure 3 and Figure 4 As shown: A spring 9 is fitted on the outer side of the connecting post 8, with one end tightly abutting against the anti-detachment plate at the end of the connecting post 8, and the other end tightly abutting against the side wall of the connecting rod 10. In its natural state, the spring 9 always applies elastic pressure to the connecting rod 10 in the direction of the limiting cylinder 11, causing the protrusion 13 to be tightly engaged in the limiting cylinder 11, preventing the protrusion 13 from accidentally dislodging from the limiting cylinder 11 during vehicle travel or when the tailgate is under load. When it is necessary to adjust the state of the folding plate 6, the operator only needs to overcome the elastic force of the spring 9 to push the connecting rod 10, which will disengage the protrusion 13 from the limiting cylinder 11. The operation is convenient and requires no additional tools.

[0022] like Figure 3 and Figure 4 As shown: Two observation holes 12 are provided on the outer wall of the telescopic plate 2. The observation holes 12 are circular or oblong, and their diameter is larger than the outer diameter of the limiting cylinder 11. The positions of the two observation holes 12 correspond one-to-one with the positions of the two limiting cylinders 11. The operator can quickly insert the protrusion 13 into the interior of the limiting cylinder 11 through the observation holes 12.

[0023] like Figure 1 and Figure 2 As shown: Two slide rails 4 are symmetrically fixedly installed on the lower surface of the main board 1. The slide rails 4 have a groove structure. The two sides of the telescopic plate 2 are inserted into the grooves of the slide rails 4. The two are in clearance fit, so that the telescopic plate 2 can slide smoothly along the slide rails 4.

[0024] like Figure 2 As shown: Two telescopic cylinders 5 are mounted on the lower surface of the main board 1. The telescopic cylinders 5 can be hydraulic cylinders or pneumatic cylinders. The cylinder ends are connected to the lower surface of the main board 1 through a hinge structure. The piston rod ends of the telescopic cylinders 5 are connected to the outer wall of the telescopic plate 2 through another set of hinge structures. When the piston rod of the telescopic cylinder 5 extends, it can drive the telescopic plate 2 to slide outward along the slide rail 4; when the piston rod retracts, it can drive the telescopic plate 2 to slide inward along the slide rail 4, providing stable power for the movement of the telescopic plate 2. Moreover, the hinge connection can adapt to the small angle changes during the sliding process of the telescopic plate 2, avoiding component damage caused by rigid connection.

[0025] like Figure 1 and Figure 2 As shown: A support roller 3 is fixedly installed on the lower surface of the tail of the main board 1. When the tail plate device carries a faulty vehicle, the support roller 3 can contact the ground to share the load-bearing pressure of the tail of the main board 1 and prevent the main board 1 from bending and deforming due to excessive force at the tail.

[0026] like Figure 6 As shown: A limiting block 7 is fixedly installed on the inner wall of the telescopic plate 2. The limiting block 7 is a block structure, and its installation position is located on the outside of the rotating end of the folding plate 6. An adapter groove 71 is opened on the side of the limiting block 7 facing the folding plate 6. The groove shape of the adapter groove 71 is perfectly matched with the end cross-sectional shape of the folding plate 6 when it is vertically unfolded. When the folding plate 6 is rotated to the support state perpendicular to the ground, the rotating end of the folding plate 6 is exactly located in the adapter groove 71. The groove wall of the adapter groove 71 can limit and support the folding plate 6 at the end, preventing the folding plate 6 from shifting or rotating excessively during the support process, and further improving the stability of the folding plate 6 in supporting the middle of the telescopic plate 2.

[0027] Working principle: When the device is not in operation, it is in a compact and retracted state. The two telescopic plates 2 are completely located within the slide rails 4 on the lower surface of the main plate 1, with no excess protrusion, reducing the space occupied by the tow truck during operation. The folding plate 6 is retracted into the inner wall of the telescopic plate 2. Under the elastic pressure of the spring 9, the protrusion 13 at the end of the connecting rod 10 is engaged with the corresponding limiting cylinder 11 in the retracted state. Through the cooperation between the protrusion 13 and the limiting cylinder 11, the folding plate 6 is firmly fixed in the retracted position.

[0028] When a disabled vehicle needs to be supported, the telescopic cylinder 5 on the lower surface of the main board 1 is activated. The piston rod of the telescopic cylinder extends outward. Since the end of the piston rod is hinged to the telescopic plate 2 and the end of the cylinder is hinged to the lower surface of the main board 1, the thrust of the piston rod will drive the telescopic plate 2 to slide smoothly outward along the slide rail 4. After the telescopic plate 2 extends into place, the folding plate 6 needs to be unfolded to reinforce and support the middle part of the telescopic plate 2 to prevent it from being completely deformed due to the weight of the vehicle.

[0029] Workers overcome the elastic force of spring 9, causing the protrusion 13 to disengage from the storage-state limiting cylinder 11, thus releasing the fixation on the folding plate 6. Then, the folding plate 6 is rotated around its axis of rotation with the telescopic plate 2 until it is perpendicular to the ground. Afterwards, the protrusion 13 is inserted into the limiting cylinder 11 corresponding to the unfolded state. Through the cooperation of the protrusion 13 and the limiting cylinder 11, the folding plate 6 is fixed in the support position, forming a rigid support for the middle of the telescopic plate 2.

[0030] The supporting function of the folding plate 6 directly solves the problem of the middle part of the telescopic plate 2 being suspended after it is extended, and avoids the situation where the telescopic plate 2 is prone to bending and deformation after long-term use and cannot be retracted.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A telescopic tailgate device for a flatbed tow truck, comprising a main board (1), characterized in that: The tail of the main board (1) is slidably connected to two telescopic plates (2), and the inner side of the telescopic plates (2) is rotatably connected to a folding plate (6) for supporting the middle part after the telescopic plates (2) are extended. A connecting post (8) is installed on one side of the folding plate (6), and a connecting rod (10) is rotatably connected to the connecting post (8). A protruding post (13) is installed at the end of the connecting rod (10). Two limiting cylinders (11) are installed on the inner side of the telescopic plate (2) to restrict the position of the protruding post (13) when the folding plate (6) is unfolded and retracted.

2. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: A spring (9) is fitted on the outside of the connecting column (8) to abut and limit the connecting rod (10).

3. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: Two observation holes (12) are provided on the outer side of the telescopic plate (2), and the observation holes (12) correspond to the positions of the limiting cylinder (11).

4. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: The lower surface of the main board (1) is symmetrically equipped with slide rails (4), and the telescopic plate (2) is slidably connected to the inside of the slide rails (4).

5. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: Telescopic cylinders (5) are symmetrically installed on the lower surface of the main board (1). The piston rod of the telescopic cylinder (5) is hinged to one side of the telescopic plate (2), and the other end of the telescopic cylinder (5) is hinged to the lower surface of the main board (1).

6. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: A support roller (3) is installed on the lower surface of the tail of the main board (1).

7. The telescopic tailgate device for a flatbed tow truck according to claim 1, characterized in that: A limiting block (7) is installed on the inner side of the telescopic plate (2). The limiting block (7) is located on the outer side of the rotating end of the folding plate (6). An adaptation groove (71) is provided on the limiting block (7) to adapt to the vertical unfolding of the folding plate (6).

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