High-load type lifting fork

Abstract

The utility model discloses a high-load heavy type lifting pallet fork, which relates to the technical field of large-scale train maintenance and comprises a maintenance vehicle and a pallet fork module, the pallet fork module comprises a fixed support arranged on the maintenance vehicle and a hydraulic oil cylinder arranged on the bottom wall of the fixed support, a chain is arranged to pull a lifting seat, and the hydraulic oil cylinder is arranged on the bottom wall of the fixed support. When the hydraulic oil cylinder drives the driving gear shaft to ascend, the chain can be synchronously driven to pull the lifting base to ascend, and then the detached part is adjusted to the needed height. The chain forms flexible traction on the lifting seat, so that the device can pull heavy parts, workers can maintain the parts in the tunnel conveniently, the maintenance process is effectively simplified, the maintenance difficulty is reduced, the maintenance efficiency is remarkably improved, and the operation burden of the workers is greatly relieved. In addition, a telescopic structure driven by a hydraulic oil cylinder enables the lifting seat to have 2 times of stroke driving capacity, and the liftable height range of parts is further widened.

Description

Technical Field

[0001] The utility model relates to the technical field of large train maintenance, and particularly relates to a high-load heavy-duty lifting fork. Background Art

[0002] For large trains such as trains and subways, due to their large scale and complex structure, their daily maintenance work is often carried out in a dedicated pit under the track. These maintenance operations usually follow a series of standardized processes: First, the staff disassemble the large or complex components on the train, and then move these components out of the pit so as to carry out in-depth maintenance in a more open and better-equipped environment. The reason for choosing this method is the limitation of the space inside the pit. Once the components are disassembled, due to the narrow space inside the pit, it is very difficult to find a suitable position to place and repair these components.

[0003] However, although the maintenance method of moving components out of the pit ensures to a certain extent that the components can be professionally maintained and repaired, the disassembly and handling of large components is a labor-intensive task, which greatly increases the physical burden of maintenance personnel and may lead to work fatigue or even occupational injuries. Secondly, frequent handling operations not only consume time and effort, reduce the maintenance effect, but also may cause accidental damage to the components during transportation, increasing the maintenance cost and complexity. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-load heavy-duty lifting fork to solve the technical problems mentioned in the above background art.

[0005] The technical problems to be solved by the utility model can be realized through the following technical solutions:

[0006] A high-load heavy-duty lifting fork, including a maintenance vehicle;

[0007] It further includes a fork module. The fork module includes a fixed bracket arranged on the maintenance vehicle, a hydraulic cylinder arranged on the bottom wall of the fixed bracket, a gantry frame arranged on the top end of the hydraulic cylinder, a driving gear shaft movably arranged inside the gantry frame, and a chain meshed on the outside of the driving gear shaft;

[0008] Lifting guide modules arranged on the inner walls on both sides of the fixed bracket, sliding plates arranged on the lifting guide modules, a lifting seat arranged between the sliding plates, and the lifting seat is connected to one end of the chain. A fork vertical plate movably arranged horizontally is arranged on the lifting seat, a bearing plate is arranged on the top of the fork vertical plate, and a support plate is arranged outside the fixed bracket, and the support plate is connected to the other end of the chain.

[0009] As a further solution of the present utility model: a hydraulic connection port is provided on the hydraulic cylinder, and the lifting and guiding module is composed of three vertical plates and four sets of lifting guide rails, which are used for guiding and controlling the movement of the sliding plate.

[0010] As a further solution of the present utility model: a clamping groove for limiting the workpiece is provided on the bearing plate, and cushion blocks are symmetrically arranged on the top end face of the bearing plate, and the material of the cushion blocks is elastic rubber.

[0011] As a further solution of the present utility model: limiting sliders are symmetrically arranged up and down on one side of the forklift vertical plate close to the lifting seat, and a transverse guide rail matching with the limiting sliders is arranged on one side of the lifting seat close to the forklift vertical plate.

[0012] As a further solution of the present utility model: a ball screw threadedly connected with the forklift vertical plate is provided on the lifting seat, and the forklift vertical plate can be driven to perform a transverse displacement through the ball screw.

[0013] As a further solution of the present utility model: a mounting seat for fixing the forklift module is provided on the maintenance vehicle.

[0014] Advantages of the present utility model:

[0015] In the present utility model, the lifting seat is pulled by a chain. When the hydraulic cylinder drives the driving gear shaft to rise, the chain can be synchronously driven to pull the lifting seat to rise, and then the disassembled parts can be adjusted to the required height. The chain forms a flexible traction on the lifting seat, enabling the device to pull heavier parts, greatly facilitating the maintenance of parts by the staff in the tunnel, effectively simplifying the maintenance process, reducing the maintenance difficulty, significantly improving the maintenance efficiency, and greatly reducing the operation burden of the staff. In addition, the telescopic structure composed of the hydraulic cylinder enables the lifting seat to have a 2-fold range-increasing driving ability, further broadening the range of the liftable height of the parts. Description of the drawings

[0016] Figure 1 is the three-dimensional assembly schematic diagram of the forklift module in the present utility model;

[0017] Figure 2 is the three-dimensional schematic diagram of the forklift module in the present utility model;

[0018] Figure 3 is the three-dimensional schematic diagram of the lifting and guiding module in the present utility model;

[0019] Figure 4 is the three-dimensional schematic diagram of the lifting seat in the present utility model;

[0020] Figure 5 is the schematic diagram of the ball screw structure in the present utility model.

[0021] Wherein: 1. Fork module; 101. Fixed bracket; 102. Hydraulic cylinder; 103. Gantry; 104. Driving gear shaft; 105. Chain; 106. Lifting guide module; 107. Slide plate; 108. Lifting seat; 109. Fork vertical plate; 110. Bearing plate; 111. Spacer block; 112. Support plate; 113. Limit slider; 114. Horizontal guide rail; 115. Ball screw; 2. Mounting seat. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] As Figures 1-5 shown, a high-load lifting fork includes a maintenance vehicle, and a hydraulic station is provided on the maintenance vehicle to provide a power source for the movement of the fork module 1;

[0024] It further includes a fork module 1. The fork module 1 includes a fixed bracket 101 disposed on the maintenance vehicle, a hydraulic cylinder 102 disposed on the bottom wall of the fixed bracket 101. A hydraulic connection port is provided on the hydraulic cylinder 102. A gantry 103 is disposed at the top end of the hydraulic cylinder 102. A driving gear shaft 104 is movably disposed inside the gantry 103. A chain 105 is meshed and disposed outside the driving gear shaft 104. Lifting guide modules 106 are disposed on the inner walls on both sides of the fixed bracket 101. A sliding plate 107 is disposed on the lifting guide modules 106. The lifting guide module 106 is composed of three vertical plates and four sets of lifting guide rails, and is used for guiding and controlling the movement of the sliding plate 107. A lifting seat 108 is disposed between the sliding plates 107, and the lifting seat 108 is connected to one end of the chain 105. A fork vertical plate 109 that can move horizontally is disposed on the lifting seat 108. A bearing plate 110 is disposed on the top of the fork vertical plate 109. A support plate 112 is disposed outside the fixed bracket 101, and the support plate 112 is connected to the other end of the chain 105. The bearing plate 110 is used for placing parts. Both ends of the chain 105 are respectively connected to the lifting seat 108 and the support plate 112. When the driving gear shaft 104 is driven by the hydraulic cylinder 102 to rise, since the driving gear shaft 104 is meshed with the chain 105, when the driving gear shaft 104 rises, the lifting seat 108 connected to one end of the chain 105 can be pulled to rise synchronously. When the hydraulic cylinder 102 rises to the maximum stroke, a 2-fold stroke drive of the lifting seat 108 is achieved. The staff can adjust the height of the parts placed on the bearing plate 110 by controlling the telescopic movement of the hydraulic cylinder 102, so that the parts can be at a certain height, facilitating the staff to repair the parts in the tunnel. The lifting guide module 106 can form a guiding limit for the movement of the bearing plate 110, ensuring the stability of the bearing plate 110 during movement. The lifting guide module 106 adopts a three-dimensional telescopic guiding structure, and a total of 12 telescopic guide rails are configured to achieve a high-precision and high-rigidity telescopic guiding function, and the effective lifting stroke reaches 1200 mm.

[0025] In this embodiment, specifically, a clamping groove for limiting the workpiece is formed on the bearing plate 110, ensuring that the parts of the large train can be stably placed on the bearing plate 110 for repair. Elastic rubber pads 111 are symmetrically disposed on the top end face of the bearing plate 110. The disposed pads 111 prevent the parts from making rigid contact with the bearing plate 110, forming good protection for both of them.

[0026] In this embodiment, specifically, on the side of the forklift fork vertical plate 109 close to the lifting seat 108, limit sliders 113 are symmetrically arranged up and down. On the side of the lifting seat 108 close to the forklift fork vertical plate 109, a transverse guide rail 114 matching the limit sliders 113 is provided. A ball screw 115 threadedly connected to the forklift fork vertical plate 109 is arranged on the lifting seat 108. The forklift fork vertical plate 109 can be driven to perform a transverse displacement through the ball screw 115. While the limit sliders 113 and the transverse guide rail 114 cooperate with each other to form a stable support for the forklift fork vertical plate 109, the forklift fork vertical plate 109 can also perform a transverse movement on the lifting seat 108. By rotating the ball screw 115, the position of the forklift fork vertical plate 109 can be adjusted. During disassembly and assembly operations, the central position of the forklift fork vertical plate 109 can be accurately adjusted within a small range, so that the tooling can conveniently lift the workpiece to achieve precise positioning.

[0027] In this embodiment, specifically, a mounting seat 2 for fixing the forklift fork module 1 is arranged on the maintenance vehicle. By providing the mounting seat 2, the forklift fork module 1 can be fixed to the maintenance vehicle, which helps to improve the stability of the forklift fork module 1 during use.

[0028] The above has described in detail an embodiment of the present invention. However, the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A high-load lifting fork, including a maintenance vehicle; characterized in that: It further includes a fork module (1), and the fork module (1) includes a fixed bracket (101) arranged on the maintenance vehicle, a hydraulic cylinder (102) arranged on the bottom wall of the fixed bracket (101), a gantry (103) arranged on the top end of the hydraulic cylinder (102), a driving gear shaft (104) movably arranged inside the gantry (103), and a chain (105) meshed and arranged on the outside of the driving gear shaft (104); Lifting guide modules (106) arranged on the inner walls on both sides of the fixed bracket (101), sliding plates (107) arranged on the lifting guide modules (106), a lifting seat (108) arranged between the sliding plates (107), and the lifting seat (108) is connected to one end of the chain (105), a fork vertical plate (109) that can move horizontally arranged on the lifting seat (108), a bearing plate (110) arranged on the top of the fork vertical plate (109), a support plate (112) arranged on the outside of the fixed bracket (101), and the support plate (112) is connected to the other end of the chain (105).

2. The high-load heavy-duty lifting fork according to claim 1, wherein The hydraulic cylinder (102) is provided with a hydraulic connection port, and the lifting guide module (106) is composed of three vertical plates and four sets of lifting guide rails, and is used for guiding and controlling the movement of the sliding plate (107).

3. A high-load heavy-duty lifting fork according to claim 1, characterized in that, The bearing plate (110) is provided with a card slot for limiting the workpiece, and cushion blocks (111) are symmetrically arranged on the top end face of the bearing plate (110), and the material of the cushion blocks (111) is elastic rubber.

4. A high-load heavy-duty lifting fork according to claim 1, characterized in that, Limit sliders (113) are symmetrically arranged up and down on one side of the fork vertical plate (109) close to the lifting seat (108), and a horizontal guide rail (114) matching the limit sliders (113) is arranged on one side of the lifting seat (108) close to the fork vertical plate (109).

5. A high-load heavy-duty lifting fork according to claim 1, characterized in that, A ball screw (115) threadedly connected to the fork vertical plate (109) is arranged on the lifting seat (108), and the fork vertical plate (109) can be driven to perform a horizontal displacement through the ball screw (115).

6. The high-load and heavy-duty lifting fork according to claim 5, characterized in that, An installation seat (2) for fixing the fork module (1) is arranged on the maintenance vehicle.

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