Clamping device for maintenance of bevel gear shaft of mining speed reducer

Abstract

A maintenance clamping device for a bevel gear shaft of a mining speed reducer comprises a chuck, a clamping part and a jacking part. Clamping jaws are evenly installed on the end face of the chuck in the circumferential direction, the chuck can drive the clamping jaws to move in the radial direction of the chuck, the clamping parts are installed on the clamping jaws and can clamp the gear part of the bevel gear shaft in the radial direction, and the jacking and pressing parts can abut against the non-gear end of the bevel gear shaft and cooperate with the clamping parts to achieve clamping in the axial direction of the bevel gear shaft. When the device is used for clamping the bevel gear shaft, a clamping process table does not need to be reserved at the head of the bevel gear shaft, the clamping stability can be guaranteed, the disassembled bevel gear shaft can be rapidly subjected to turning, grinding and other procedures, the bevel gear shaft is repaired to the drawing size, the maintaining and machining precision is guaranteed, the maintaining period is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bevel gear shaft technology, and in particular to a maintenance and clamping device for bevel gear shafts in mining reducers. Background Technology

[0002] Bevel gears are conical gears that transmit motion between two intersecting shafts, and are an important type of mechanical transmission. Bevel gear pairs in mining reducers are characterized by smooth transmission, high load-bearing capacity, and high efficiency, and are suitable for scraper conveyors and transfer machines in underground coal mine faces. The bevel gear shaft, as its core component, is made of materials with good toughness, wear resistance, and machinability. The manufacturing process is long and complex, resulting in a high-value product. During operation, wear and scratches will appear on the outer circumference of the bevel gear shaft. However, to ensure the service life of the mining reducer, disassembly, repair, and remanufacturing of the workpiece are indispensable.

[0003] During the machining of bevel gear shafts, the conical head makes it impossible to clamp during turning, grinding, and spline hobbing processes. A clamping table needs to be pre-installed on the head of the bevel gear shaft before blanking to allow for clamping and completing these machining operations. After these operations, to avoid interference with the housing during assembly, the pre-installed clamping table needs to be machined away. However, during disassembly and repair, when scratches, wear, or abrasions appear on the outer diameter of the shaft, it needs to be repaired by welding or cladding. After this repair, the conical head cannot be clamped during machining, requiring a welding table on the head and grinding of the center hole, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] In order to solve the technical problems existing in the above-mentioned technologies, it is necessary to provide a maintenance clamping device for bevel gear shafts of mining reducers.

[0005] A maintenance clamping device for a bevel gear shaft in a mining reducer includes a chuck, a clamping part, and a pressing part. The chuck end face is circumferentially equipped with jaws, and the chuck can drive the jaws to move in the radial direction of the chuck. The clamping part is mounted on the jaws and can clamp the gear part of the bevel gear shaft in the radial direction. The pressing part can press against the non-gear end of the bevel gear shaft and cooperate with the clamping part to achieve clamping in the axial direction of the bevel gear shaft.

[0006] Preferably, the clamping part has an arc-shaped groove that can hold the gear part of the bevel gear shaft.

[0007] Preferably, the diameter of the arc-shaped groove gradually decreases from one end to the other, so that the arc-shaped groove can be adapted to the gear part of the bevel gear shaft.

[0008] Preferably, the end of the arc-shaped groove with a smaller diameter has a limiting block that can fit against the end face of the gear portion of the bevel gear shaft.

[0009] Preferably, the end face of the top pressing part is tapered.

[0010] Preferably, a top plate is provided on the side of the top pressing part near the conical end.

[0011] Preferably, the chuck has a guide groove for the movement of the jaws, and the guide groove has protrusions arranged in the radial direction of the chuck.

[0012] Preferably, the claw has a groove that matches the protrusion.

[0013] Preferably, the jaws have locking platforms capable of locking the clamping part that moves along the radial direction of the chuck, and the locking platforms are distributed in a stepped manner.

[0014] Preferably, the number of grippers is four, and the number of clamping parts is the same as the number of grippers.

[0015] Compared with existing technologies, the mining reducer bevel gear shaft repair and clamping device provided by this utility model includes a chuck, a clamping part, and a pressing part. The chuck end face is circumferentially equipped with jaws, which can drive the jaws to move radially. The clamping part is mounted on the jaws and can clamp the gear portion of the bevel gear shaft radially. The pressing part can press against the non-gear end of the bevel gear shaft and, in conjunction with the clamping part, achieves clamping in the axial direction of the bevel gear shaft. By using this device to clamp the bevel gear shaft, there is no need to reserve a clamping process table at the head of the bevel gear shaft. This not only ensures clamping stability but also allows for rapid machining and grinding of the disassembled bevel gear shaft to the dimensions shown in the drawings, ensuring repair and machining accuracy, shortening the repair cycle, and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model in use.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the clamping part of this utility model.

[0020] Figure 4 This is a schematic diagram of the top pressure part of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the chuck of this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of the chuck claw of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of a bevel gear shaft.

[0024] In the figure: chuck 01, guide groove 11, protrusion 12, clamping part 02, arc groove 21, limiting block 22, top pressing part 03, top plate 31, chuck claw 04, slide groove 41, clamping platform 42, bevel gear shaft 05. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Please refer to Figures 1 to 7 This utility model provides a maintenance and clamping device for a bevel gear shaft in a mining reducer, including a chuck 01, a clamping part 02, and a pressing part 03. The chuck 01 has jaws 04 evenly distributed around its end face, allowing the jaws 04 to move radially. The clamping part 02 is mounted on the jaws 04 and can clamp the gear portion of the bevel gear shaft 05 radially. The outer contour of the clamping part 02 is an arc surface. The pressing part 03 presses against the non-gear end of the bevel gear shaft 05 and, in conjunction with the clamping part 02, clamps the bevel gear shaft 05 axially. When clamping the bevel gear shaft 05, there is no need to reserve a clamping process table at the head of the bevel gear shaft 05. This not only ensures clamping stability but also allows for rapid machining and grinding of the disassembled bevel gear shaft 05, repairing it to the dimensions shown in the drawings, ensuring machining accuracy, shortening the maintenance cycle, and improving production efficiency.

[0028] In one embodiment, the clamping part 02 has an arcuate groove 21 that can hold the gear part of the bevel gear shaft 05.

[0029] The diameter of the arc-shaped groove 21 gradually decreases from one end to the other, so that the arc-shaped groove 21 can be adapted to the gear part of the bevel gear shaft 05.

[0030] Specifically, the smaller diameter end of the arc-shaped groove 21 has a limiting block 22 that can fit the end face of the gear part of the bevel gear shaft 05. The limiting block 22 can hold the end face of the bevel gear shaft 05. When the top pressing part 03 clamps it from the axial direction, the limiting block 22 and the top pressing part 03 can be used to clamp the bevel gear shaft 05 from both ends to limit the axial displacement of the bevel gear shaft 05.

[0031] In one embodiment, the end face of the pressing part 03 is tapered. A top plate 31 is provided on the side of the pressing part 03 near the tapered end. When the tapered end is inserted into the hole on the end face of the bevel gear shaft 05, the top plate 31 can increase the contact area and ensure the stability of the pressing.

[0032] In one embodiment, the chuck 01 has a guide groove 11 for the movement of the jaws 04, and the guide groove 11 has a protrusion 12 arranged in the radial direction of the chuck 01. Correspondingly, the jaws 04 have a sliding groove 41 that matches the protrusion 12.

[0033] In one embodiment, the chuck 04 has a locking platform 42 capable of locking the clamping part 02 that moves in the radial direction along the chuck 01, and the locking platform 42 is distributed in a stepped manner.

[0034] In one embodiment, the number of chucks 04 is four, and the number of clamping parts 02 is the same as the number of chucks 04.

[0035] In use, first assemble the chuck 01 onto a CNC lathe, grinder, or other equipment, then assemble the jaws 04 inside the chuck 01 and adjust them to a position suitable for the outer diameter of the clamping part 02. Assemble the clamping part 02, which consists of four pieces, evenly distributed around the A-side and the front conical surface B-side of the bevel gear shaft 05d. Clamp the jaws 04 tightly onto the outer diameter of the clamping part 02. During clamping, carefully observe the gap between the head A-side and the front conical surface B-side of the bevel gear shaft 05 and the clamping part 02, ensuring a tight fit without any gaps. After clamping, align the outer diameter of the clamping part 02, ensuring the tolerance meets the process requirements. This also allows for the detection of unrepaired outer diameter runout of the bevel gear shaft 05, determining the fit accuracy between the clamping part 02 and the bevel gear shaft 05, ensuring consistent machining datum, and improving the repair and machining accuracy of the product. If the center hole at the small end is aligned after clamping, the top pressure part 03 can be used for auxiliary support. Subsequently, the bevel gear shaft 05 can be machined, ground, or otherwise repaired to the dimensions shown in the drawing, shortening the maintenance cycle. The clamping part 02 is reusable, meaning the front cone surface B is consistent, and can be used for the repair and machining of various bevel gear shafts 05. This eliminates the need for welding process tables to repair the center hole, ensuring maintenance and machining accuracy and improving production efficiency.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A maintenance clamping device for bevel gear shafts in mining reducers, characterized in that: It includes a chuck, a clamping part, and a pressing part; the chuck end face is evenly equipped with jaws in the circumferential direction, and the chuck can drive the jaws to move in the radial direction of the chuck. The clamping part is installed on the jaws and can clamp the gear part of the bevel gear shaft in the radial direction. The pressing part can press against the non-gear end of the bevel gear shaft and cooperate with the clamping part to achieve clamping in the axial direction of the bevel gear shaft.

2. The maintenance clamping device for the bevel gear shaft of a mining reducer according to claim 1, characterized in that: The clamping part has an arc-shaped groove that can hold the gear part of the bevel gear shaft.

3. The maintenance and clamping device for the bevel gear shaft of a mining reducer according to claim 2, characterized in that: The diameter of the arc-shaped groove gradually decreases from one end to the other, so that the arc-shaped groove can be adapted to the gear part of the bevel gear shaft.

4. The maintenance and clamping device for the bevel gear shaft of a mining reducer according to claim 3, characterized in that: The smaller diameter end of the arc-shaped groove has a limiting block that can fit against the end face of the gear section of the bevel gear shaft.

5. The maintenance clamping device for the bevel gear shaft of a mining reducer according to any one of claims 1-4, characterized in that: The end face of the top pressure part is conical.

6. The maintenance clamping device for the bevel gear shaft of a mining reducer according to claim 5, characterized in that: A top plate is provided on the side of the top pressing part near the conical end.

7. The maintenance and clamping device for the bevel gear shaft of a mining reducer according to claim 5, characterized in that: The chuck is provided with guide grooves for the movement of the jaws, and the guide grooves have protrusions arranged along the radial direction of the chuck.

8. The maintenance clamping device for the bevel gear shaft of a mining reducer according to claim 7, characterized in that: The claw has a groove that matches the protrusion.

9. The maintenance and clamping device for the bevel gear shaft of a mining reducer according to claim 8, characterized in that: The jaws have locking platforms that can lock the clamping part to move in the radial direction of the chuck, and the locking platforms are distributed in a stepped manner.

10. The maintenance clamping device for the bevel gear shaft of a mining reducer according to claim 1, characterized in that: The number of chucks is four, and the number of clamping parts is the same as the number of chucks.

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