Large-tonnage vehicle-mounted hydraulic tail plate

Abstract

The utility model discloses a large tonnage vehicle-mounted hydraulic tail plate relates to on -vehicle handling equipment technical field, and mainly comprises frame, lifting arm, bearing platform, installation hanging board and auxiliary support leg, the auxiliary support leg symmetry sets up in the both ends of frame, and the auxiliary support foot is fixedly connected through bolt with frame, still be equipped with two groups symmetrical distribution's hydraulic oil jar subassembly on the frame, the top of hydraulic oil jar subassembly is connected with lifting arm, the top of lifting arm is connected with bearing platform pivot, solved because the problem of traditional hydraulic tail plate carrying capacity is limited, and the higher requirement of vehicle chassis's intensity.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle loading and unloading equipment, and in particular to a large-tonnage vehicle-mounted hydraulic tailgate. Background Technology

[0002] In recent years, truck-mounted tailgates have gained increasing recognition as a type of loading and unloading equipment due to their convenience, leading to a wider range of applications and a growing proportion of vans equipped with hydraulic tailgates. However, when handling large-tonnage, integral cargo, hydraulic tailgates with corresponding load-bearing capacity are required.

[0003] The structure of a traditional hydraulic tailgate mainly consists of a frame, lifting arm, hydraulic cylinders, a load-bearing platform, and a mounting plate. Due to the limited load-bearing capacity of traditional hydraulic tailgates, the nominal load is generally no more than 2000 kg. A few hydraulic tailgates can meet the load requirement of 3000 kg, but this requires a high level of strength from the vehicle chassis. Currently, hydraulic tailgates with a 3000 kg load capacity can only be installed on heavy-duty trucks, and there are certain risks involved in their use.

[0004] During loading and unloading, traditional hydraulic tailgates place high demands on the strength of the lifting platform and chassis longitudinal beams due to the weight of the tailgate itself, the cargo, and the torque generated by the cantilever. When a traditional tailgate bears a large tonnage load, the lifting platform and chassis beams must withstand enormous torque and bending moment during lifting. The shear force on the bolts connecting the lifting platform and chassis beams also increases significantly. With the continuous promotion of lightweight design concepts, vehicle chassis do not have much strength reserve. Under these circumstances, it is obviously impossible to rely solely on the chassis beams to bear all the loads when installing ultra-large tonnage hydraulic tailgates. Utility Model Content

[0005] The purpose of this utility model is to provide a large-tonnage vehicle-mounted hydraulic tailgate, which solves the problems mentioned in the background art.

[0006] This utility model is implemented as follows: a large-tonnage vehicle-mounted hydraulic tailgate mainly consists of a frame, a lifting arm, a carrying platform, a mounting plate, and auxiliary outriggers. The auxiliary outriggers are symmetrically arranged at both ends of the frame, and the auxiliary outriggers are connected and fixed to the frame by bolts. The frame is also provided with two sets of symmetrically distributed hydraulic cylinder assemblies. The top end of the hydraulic cylinder assembly is connected to the lifting arm, and the top end of the lifting arm is connected to the rotating shaft of the carrying platform.

[0007] A further technical solution of this utility model is: the hydraulic cylinder assembly includes a lifting cylinder and a closing cylinder, and the bottom ends of both the lifting cylinder and the closing cylinder are rotatably connected to the frame.

[0008] A further technical solution of this utility model is: the output end of the door closing cylinder is connected to the bearing platform, and the output end of the lifting cylinder is connected to the bearing platform through the lifting arm.

[0009] A further technical solution of this utility model is: the auxiliary support leg is a telescopic and foldable structure, which can be lowered and reliably supported on the ground when in use.

[0010] A further technical solution of this utility model is that the mounting plate is connected to the frame by bolts to facilitate maintenance or replacement.

[0011] The beneficial effects of this utility model are as follows: With the increasing application of vehicle-mounted robots, especially the growing use of large self-propelled robots to replace manual labor in certain hazardous work environments, the problem of robot transportation has become increasingly apparent. Due to the large size and heavy weight of robots, they cannot be disassembled for transport. Traditional tailgates cannot meet the lifting requirements of such items. Furthermore, due to the robot's weight, lifting it onto a transport vehicle can easily cause the front of the vehicle to lift off the ground, resulting in serious accidents. The introduction of this solution solves the problem of using hydraulic tailgates for transportation in the above scenarios, and is of great significance for equipment transportation in industries such as fire fighting, military, and exploration. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of a large-tonnage vehicle-mounted hydraulic tailgate provided by this utility model;

[0013] Figure 2 This is a side view of a large-tonnage vehicle-mounted hydraulic tailgate provided by this utility model;

[0014] Figure 3 This is a schematic diagram of the operation of a large-tonnage vehicle-mounted hydraulic tailgate provided by this utility model.

[0015] Reference numerals in the attached diagram: 1. Frame; 2. Door closing cylinder; 3. Lifting cylinder; 4. Mounting plate; 5. Lifting arm; 6. Supporting platform; 7. Auxiliary outriggers. Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0017] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0018] This utility model provides a large-tonnage vehicle-mounted hydraulic tailgate, the overall structure of which is as follows: Figure 1 As shown, it mainly consists of a frame 1, a lifting arm 5, a supporting platform 6, a mounting plate 4, a hydraulic cylinder assembly, and auxiliary outriggers 7. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] The frame 1 is the main mounting bracket in this utility model, and it has a rectangular frame structure. Auxiliary legs 7 are symmetrically installed at both ends of the frame 1 and are fixed to the frame 1 by bolts to facilitate subsequent maintenance and disassembly of the auxiliary legs 7. At the same time, the frame 1 is also equipped with a hydraulic cylinder assembly, the main function of which is to drive the bearing platform to complete the lifting action, including the door closing cylinder 2 and the lifting cylinder 3.

[0020] The auxiliary support 7 is the core component of this invention. The auxiliary support leg 7 is a hydraulically telescopic and folding structure. During use, the auxiliary support leg is lowered and reliably supports the ground. Compared to traditional vehicle-mounted hydraulic tailgates, during operation, besides a portion being borne by the lifting plate and transferred to the chassis beam, a large portion of the load, including its own weight and the load on the load-bearing platform, is directly transferred to the ground through the auxiliary support leg 7, significantly reducing the load on the lifting plate and chassis beam. Compared to traditional hydraulic tailgates, the auxiliary support leg 7 not only increases the support points during tailgate operation but also changes the support points, as described in detail below:

[0021] like Figure 3As shown, according to the lever principle, a balance of torques is necessary for a hydraulic tailgate to maintain vehicle stability during operation and prevent the vehicle's nose from lifting up, which could lead to tipping and other hazards. In traditional vehicle-mounted hydraulic tailgates, the fulcrum of the lever is the rear tire, resulting in a long lever arm and a large torque, significantly increasing the likelihood of the vehicle tipping up during operation. In this design, the fulcrum is moved to the auxiliary outrigger 7. The load from the cargo and tailgate is mostly borne by the auxiliary outrigger 7, with a smaller portion borne by the wheels. Due to the reduced lever arm, the torque relative to the entire vehicle caused by the load from the cargo and tailgate is significantly reduced, greatly improving stability.

[0022] Furthermore, when the hydraulic tailgate is under load, due to the action of the auxiliary outriggers 7, most of the vertical load generated by the tailgate's own weight and the cargo is borne by the auxiliary outriggers 7, with only a small portion of the load being transferred to the vehicle's main beam. This significantly reduces the strength requirements of the vehicle's main beam. Calculations show that using the auxiliary outriggers 7 reduces the maximum stress on the main beam by more than half. For a tailgate bearing a 4-ton tail load, the strength requirement for the main beam is only equivalent to that of a standard tailgate with a 2-ton load. In this case, no special reinforcement of the vehicle's main beam is required to meet the installation and use of a large-tonnage tailgate, greatly increasing the applicability of this tailgate design.

[0023] like Figure 1 As shown, the auxiliary support 7 is a telescopic and folding structure, mainly divided into three parts: an outer connector, an inner support rod, and legs. The legs are connected to the inner support rod using a hinge mechanism with a self-locking function, and the unfolding angle is from 0° to 90° to facilitate folding and storage. Additionally, a pressure sensor can be installed at the bottom of the legs to monitor the grounding pressure.

[0024] In actual operation, the operation of the vehicle-mounted hydraulic tailgate is divided into several stages. During the preparation stage, the vehicle must be parked within the designated area and braking measures must be in place. After the operator manually releases the locking mechanism of the auxiliary outrigger 7 (theoretically, the auxiliary outrigger 7 can be hydraulically, electrically, or mechanically driven, but their applicable load-bearing capacities differ, so hydraulic drive is preferred), the auxiliary outrigger 7 will automatically lower until it touches the ground. When the system starts and the power is connected, the control box automatically executes the system self-test program, the hydraulic pump begins to build pre-pressure, and the unloading oil circuit is closed. Upon entering the lifting operation stage, the operator triggers the lifting command, the solenoid valve opens the oil circuit, causing the piston rod of the lifting cylinder 3 to extend at a speed of 0.1 m / s to 0.2 m / s, driving the lifting arm 5 to lift the carrying platform 6 to the height of the vehicle compartment. At this time, the PLC monitors the pressure difference between the two auxiliary outriggers 7 in real time; when the difference exceeds 10%, an audible and visual alarm is triggered. Once the platform is in position, it enters the tilting stage. The closing cylinder 2 controls the platform to tilt from 0 to 180 degrees at a speed of 10° to 15° / s, with the movement speed precisely adjusted by a throttle valve. During loading and unloading operations, the carrying platform 6 tilts outward to a horizontal position or inward into the truck bed as needed. In the final reset stage, the order of lowering the platform first and then retracting the outriggers is strictly followed. The hydraulic system is depressurized to below a specified value, and the entire process is completed after the outrigger position sensors confirm that the outriggers are fully retracted and the gap between the tailgate and the truck bed latch is less than 3mm.

[0025] Based on the above steps, Hubei Jiulin Machinery Equipment Co., Ltd.'s JLC40 series tailgate tailgate has achieved a technological breakthrough with a maximum load capacity of 5 tons, and is in a leading position in China in terms of maximum load capacity of tailgates.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large-tonnage vehicle-mounted hydraulic tailgate, characterized in that: The large-tonnage vehicle-mounted hydraulic tailgate is mainly composed of a frame (1), a lifting arm (5), a bearing platform (6), a mounting plate (4), and auxiliary legs (7). The auxiliary legs (7) are symmetrically arranged at both ends of the frame (1), and the auxiliary legs (7) are connected and fixed to the frame (1) by bolts. The frame (1) is also provided with two sets of symmetrically distributed hydraulic cylinder assemblies. The top of the hydraulic cylinder assembly is connected to the lifting arm (5), and the top of the lifting arm (5) is connected to the rotating shaft of the bearing platform (6).

2. The large-tonnage vehicle-mounted hydraulic tailgate according to claim 1, characterized in that, The hydraulic cylinder assembly includes a lifting cylinder (3) and a closing cylinder (2).

3. The large-tonnage vehicle-mounted hydraulic tailgate according to claim 2, characterized in that, The output end of the closing cylinder (2) is connected to the bearing platform (6), and the output end of the lifting cylinder (3) is connected to the bearing platform (6) through the lifting arm (5).

4. The large-tonnage vehicle-mounted hydraulic tailgate according to claim 1, characterized in that, The auxiliary support leg (7) is a telescopic and foldable structure.

5. The large-tonnage vehicle-mounted hydraulic tailgate according to claim 1, characterized in that, The mounting plate (4) is connected to the frame (1) by bolts.

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