Loader gearbox piston dismounting tool

Abstract

The utility model discloses a loader gearbox piston dismounting tool which comprises a lower supporting ring and a supporting disc detachably installed above the lower supporting ring, a threaded sleeve is fixed to the center of the interior of the supporting disc, a threaded rod is matched with the interior of the threaded sleeve in a threaded mode, and an inserting connection anti-disengaging structure is arranged at the top end of the threaded rod. A hexagonal connector with a hexagonal sinking part is installed at the top end of the threaded rod through an insertion-connection anti-falling structure, and a pressing disc is rotationally installed at the bottom end of the threaded rod. The piston oil seal assembling device is safe to operate, the moving distance and speed of the pressing disc can be accurately controlled according to needs through cooperation of the hexagonal connector, the threaded rod, the threaded sleeve and other structures, it is guaranteed that the spring is evenly stressed, and the problem that a piston oil seal is damaged or the assembling quality is reduced due to uneven stress is solved; and meanwhile, workers can complete the compression and release processes of the spring in a short time, and the whole maintenance process can be more efficient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of loader gearbox maintenance tools, in particular to a loader gearbox piston disassembly tool. Background Art

[0002] As the main equipment for loading and transporting phosphate ore, loaders are responsible for loading and transporting trains, cars, joint mining, flattening and stacking, etc. The annual operating volume of loaders is about 2.5 million tons. Currently, there are 5 Liugong loaders in use. In recent years, the working hours of loaders have increased, and the failure rate has also increased accordingly. When the gearbox piston fails, the maintenance time is long. Shortening the maintenance time of the failure as much as possible can reduce the failure rate of the loader and improve the integrity rate of the loader. The direct gear (forward gear) of the loader planetary gearbox is used under driving conditions. Its quality directly affects the working efficiency of the loader. In actual maintenance, it is found that the failures caused by damage to the piston oil seal and wear of the piston body are the most. At present, it is difficult to disassemble the loader gearbox piston. The main reason is that the compression spring inside the loader gearbox exerts a huge elastic pressure on the piston and the piston oil seal. Therefore, when repairing the gearbox piston of the Liugong loader, the staff needs to press the compression spring with a copper rod. However, the piston compression spring is usually subject to high elastic pressure inside the gearbox. This pressure may be released suddenly during operation. If it is not properly controlled, it may cause the copper rod to detach or the spring to pop out suddenly, causing injury. In particular, the copper rod is not specially designed to withstand the force when the spring is released, and its strength and stability may not be sufficient to ensure safety. Manually pressing the spring with a copper rod is also a relatively inefficient operation method. This method is not only time-consuming and labor-intensive, but also requires the cooperation of multiple people to complete, which increases the time cost of loader gearbox maintenance work. Utility Model Content

[0003] The utility model aims to provide a loader gearbox piston disassembly tool, which places a lower support ring against the housing of the loader gearbox, and screws a threaded rod through a hexagonal joint, so that a pressure plate is sent into the housing of the loader gearbox by the threaded rod, and then a wing plate is unfolded and the wing plate is stuck in the turn section of the spring, and the pressure plate and the wing plate apply pressure to the spring through the screwing and feeding of the threaded rod, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: A piston disassembly tool for a loader gearbox, which includes a lower support ring and a support disk detachably installed above the lower support ring. A threaded sleeve is fixed at the central position inside the support disk. A threaded rod is in threaded fit with the inside of the threaded sleeve. An insertion anti - detachment structure is arranged at the top end of the threaded rod. A hexagonal joint with a hexagonal sinking part is installed at the top end of the threaded rod through the insertion anti - detachment structure. The bottom end of the threaded rod is rotatably installed with a pressure plate, and a plurality of symmetrically arranged wing plates are installed at the top end of the pressure plate through a hinge shaft.

[0005] Preferably, a rectangular cutting groove corresponding to the position of the unfolded wing plates is arranged on the inner wall of the lower support ring.

[0006] Preferably, three centrally symmetric internal threaded grooves are arranged at the top end of the lower support ring. Three equally spaced columns are rotatably installed at the bottom end of the support disk. An external threaded short column for threaded fit with the internal threaded groove is fixed at the bottom end of the column.

[0007] Preferably, a trapezoidal notch is arranged on the outer wall of one side of the support disk.

[0008] Preferably, the lower support ring, the support disk, and the pressure plate are all made of components of alloy steel material.

[0009] Preferably, the insertion anti - detachment structure includes a hexagonal column fixed at the top end of the threaded rod, rectangular grooves arranged on the outer wall of each layer of the hexagonal column, and square - mouth claws fixed at the bottom end of the hexagonal joint for sliding insertion and fit with the rectangular grooves.

[0010] Compared with the prior art, the beneficial effect of the utility model is: By setting structures such as a hexagonal joint and a threaded rod that cooperate with each other, when using the threaded rod to control the feeding of the pressure plate, the compression speed and force of the spring can be precisely controlled, avoiding accidental injuries caused by sudden release, and being safer and more reliable than manual tools such as copper rods. Moreover, the cooperation of structures such as the hexagonal joint, the threaded rod, and the threaded sleeve can precisely control the moving distance and speed of the pressure plate according to needs, ensuring uniform force on the spring, avoiding problems such as damage to the piston oil seal or decline in assembly quality caused by uneven force, and at the same time enabling the staff to complete the compression and release process of the spring in a shorter time, making the entire maintenance process more efficient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front - view structural schematic diagram of the utility model;

[0012] Figure 2 is the three - dimensional structural schematic of the utility model Figure 1 ;

[0013] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0015] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 4 .

[0016] In the figure: 1. lower support ring; 101. internal thread groove; 102. rectangular cut-out groove; 2. support plate; 201. trapezoidal notch; 3. column; 301. external thread short column; 4. threaded sleeve; 5. threaded rod; 6. plug-in anti-slip structure; 601. square-mouth claw; 602. hexagonal column; 603. rectangular groove; 7. hexagonal joint; 8. pressure plate; 9. wing plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1-5 The utility model provides an embodiment: a loader gearbox piston disassembly tool, comprising a lower support ring 1 and a support plate 2 detachably mounted above the lower support ring 1, and a threaded sleeve 4 is fixed at the central position inside the support plate 2, the internal thread of the threaded sleeve 4 is matched with a threaded rod 5, and the top of the threaded rod 5 is provided with a plug-in anti-slip structure 6, in the process of screwing the threaded rod 5, the threaded sleeve 4 supports and guides the screwing downward of the threaded rod 5, the top of the threaded rod 5 is installed with a hexagonal joint 7 with a hexagonal sinking part through the plug-in anti-slip structure 6, the bottom end of the threaded rod 5 is rotatably installed with a pressure plate 8, and the top of the pressure plate 8 is installed with a plurality of mutually symmetrical wing plates 9 through a hinge shaft;

[0019] The hexagonal protrusion of the torque wrench cooperates with the hexagonal recess at the top of the hexagonal connector 7, so that the staff can apply force to the hexagonal connector 7 and the threaded rod 5 stably and quickly through the torque wrench;

[0020] A rectangular cutout groove 102 corresponding to the position of the wing plate 9 after unfolding is provided on the inner wall of the lower support ring 1. When the pressure plate 8 and the wing plate 9 pass through the lower support ring 1, the rectangular cutout groove 102 serves as a passage for the wing plate 9 to avoid the lower support ring 1 blocking the wing plate 9 after the wing plate 9 is unfolded.

[0021] The lower support ring 1, the support disc 2, and the pressure disc 8 are all made of components made of alloy steel. The alloy steel material has excellent strength and hardness, can withstand high pressure and impact loads, and is not easily deformed or broken;

[0022] A trapezoidal notch 201 is provided on the outer wall of one side of the support disc 2. Three centrally symmetric internal thread grooves 101 are provided at the top end of the lower support ring 1. Three equally spaced columns 3 are rotatably installed at the bottom end of the support disc 2. An external thread stud 301 for threadedly mating with the internal thread groove 101 is fixed at the bottom end of the column 3. The staff can rotate each column 3 individually, so that the external thread stud 301 and the internal thread groove 101 are threadedly connected or separated, so that the support disc 2 and the lower support ring 1 can be disassembled, so as to facilitate the staff to assemble and use the tool on site;

[0023] The plug-in anti-disengagement structure 6 includes a hexagonal column 602 fixed to the top end of the threaded rod 5, rectangular grooves 603 provided on the outer wall of each layer of the hexagonal column 602, and a square claw 601 fixed to the bottom end of the hexagonal joint 7 for sliding plug-in cooperation with the rectangular grooves 603. When the threaded rod 5 and the hexagonal joint 7 are docked, the square claw 601 at the bottom end of the hexagonal joint 7 is inserted into the rectangular groove 603 on the outer wall of the hexagonal column 602 one by one. The sliding plug-in cooperation between the square claw 601 and the rectangular groove 603 enables the hexagonal joint 7 and the hexagonal column 602 to be stably docked, and enables the threaded rod 5 to be stably applied with force.

[0024] When the embodiment of the present application is in use, first, the staff takes out the device and makes the lower support ring 1 abut against the opening of the loader gearbox housing. The hexagonal joint 7 is installed at the top of the threaded rod 5 through the plugging anti-detachment structure 6. Then, the staff uses a torque wrench to rotate the hexagonal joint 7 and the threaded rod 5. Then, the threaded rod 5 rotates inside the threaded sleeve 4 and gradually descends. Subsequently, the threaded rod 5 drives the pressure plate 8 and the wing plate 9 to move downward until the pressure plate 8 and the wing plate 9 move down to the position of the spring inside the loader gearbox. Then, the staff manually rotates and unfolds the wing plate 9 so that the end of the wing plate 9 is stuck in the helical turn section of the spring. After the position of the wing plate 9 is adjusted, the staff continues to rotate the hexagonal joint 7 and the threaded rod 5 through the torque wrench. Since the bottom end of the threaded rod 5 is rotationally connected to the top end of the pressure plate 8, the threaded rod 5 will not drive the pressure plate 8 to rotate. At this time, the pressure plate 8 applies pressure to the spring through the wing plate 9 until the spring is compressed to release the gearbox piston and the piston oil seal. Then, the staff can take out the gearbox piston and the piston oil seal from the gearbox housing, and then replace the new parts. During the replacement process, the spring is still in a compressed state. After the gearbox piston and the piston oil seal are replaced, the staff rotates the hexagonal joint 7 and the threaded rod 5 in the reverse direction until the pressure plate 8 exits to the outside of the gearbox housing, so that the spring presses the gearbox piston and the piston oil seal again. When using this tool to control the feeding of the pressure plate 8 with the threaded rod 5, the compression speed and strength of the spring can be accurately controlled, avoiding accidental injuries caused by sudden release, which is safer and more reliable than manual tools such as copper rods. Moreover, the cooperation of structures such as the hexagonal joint 7, the threaded rod 5, and the threaded sleeve 4 can accurately control the moving distance and speed of the pressure plate 8 according to needs, ensuring uniform force on the spring and avoiding problems such as damage to the piston oil seal or decline in assembly quality caused by uneven force. At the same time, it enables the staff to complete the compression and release process of the spring in a shorter time, making the entire maintenance process more efficient and fast.

Claims

1. A piston disassembly tool for a loader gearbox, characterized in that: It includes a lower support ring (1) and a support disc (2) detachably installed above the lower support ring (1). A threaded sleeve (4) is fixed at the central position inside the support disc (2). A threaded rod (5) is in threaded fit with the inside of the threaded sleeve (4). The top end of the threaded rod (5) is provided with a plugging anti - detachment structure (6). The top end of the threaded rod (5) is installed with a hexagonal joint (7) with a hexagonal sinking part through the plugging anti - detachment structure (6). The bottom end of the threaded rod (5) is rotatably installed with a pressing disc (8). The top end of the pressing disc (8) is installed with a plurality of symmetrically arranged wing plates (9) through a hinge shaft.

2. The piston disassembly tool for a loader gearbox according to claim 1, characterized in that: A rectangular cutting groove (102) corresponding to the position of the unfolded wing plate (9) is arranged on the inner wall of the lower support ring (1).

3. The piston disassembly tool for a loader gearbox according to claim 1, wherein: Three centrally symmetric internal thread grooves (101) are arranged at the top end of the lower support ring (1). Three equally spaced columns (3) are rotatably installed at the bottom end of the support disc (2). An external thread short column (301) for threaded fit with the internal thread groove (101) is fixed at the bottom end of the column (3).

4. A piston disassembly tool for a loader gearbox according to claim 1, characterized in that: A trapezoidal notch (201) is arranged on the outer wall of one side of the support disc (2).

5. A piston disassembly tool for a loader gearbox according to claim 1, characterized in that: The lower support ring (1), the support disc (2), and the pressing disc (8) are all made of components made of alloy steel.

6. The piston disassembly tool for a loader gearbox according to claim 1, wherein: The plugging anti - detachment structure (6) includes a hexagonal column (602) fixed at the top end of the threaded rod (5), rectangular grooves (603) arranged on the outer wall of each layer of the hexagonal column (602), and a square - mouth claw (601) fixed at the bottom end of the hexagonal joint (7) for sliding plugging fit with the rectangular groove (603).

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