A coal mine machinery maintenance machine with a clamping structure and an operating method thereof

Abstract

This invention relates to the field of coal mining machinery technology, and more particularly to a coal mining machinery repair machine with a clamping structure and its operating method. The coal mining machinery repair machine with a clamping structure includes a worktable, support legs, a controller, a drive structure, and an adjustment structure. A first slide groove is formed above the worktable, and the drive structure is disposed inside the first slide groove. The adjustment structure is fixedly installed above the drive structure. Under the control of the controller, the drive structure slides along the first slide groove. Under the control of the controller, the adjustment structure moves the height of the clamping plate relative to the worktable, adjusting the rotation angle of the clamping plate. This invention allows the repair machine to adjust the height and repair angle of parts as needed during repair.

Description

Technical Field

[0001] This invention relates to the field of coal mining machinery technology, and in particular to a coal mining machinery repair machine with a clamping structure and its operating method. Background Technology

[0002] Coal mining machinery refers to mining machinery mainly used in the production processes of coal mining, including excavation, support, transportation, and washing. Coal mining machinery is specifically designed for coal mining and differs from other mining machinery due to its specialized characteristics. Coal mining machinery is prone to damage during prolonged use, and when damage occurs, it requires repair equipment to maintain and repair the components.

[0003] Coal mining machinery and equipment are categorized into open-pit coal mining machinery and underground coal mining machinery based on their application environment. Open-pit coal mining machinery mainly includes continuous excavators for soil stripping, mechanical excavators, large coal crushers, large belt conveyors, and large off-highway mining vehicles. Underground coal mining machinery, with the increase in fully mechanized mining and the increasing demands for coal mine safety, has made fully mechanized mining equipment the main component of coal mining machinery.

[0004] Open-pit coal mining machinery is exposed to the outdoor environment for extended periods, enduring complex climatic conditions such as sun exposure, rain, wind, sandstorms, snow, and alternating high and low temperatures. This easily leads to surface corrosion, aging of seals, deterioration of hydraulic oil, and moisture-induced failure of electrical components. Mechanical parts are also prone to fatigue cracks and corrosion damage. Furthermore, the components of open-pit coal mining machinery frequently handle materials such as coal, gangue, and rock. These materials are hard and have sharp edges, causing intense abrasive and impact wear on structures such as buckets, scrapers, conveyor belts, and frames during excavation, loading, and transportation, resulting in rapid wear of mechanical parts. In addition, open-pit coal mining machinery is mostly heavy-duty equipment, frequently subjected to impact loads and variable loads during operation, which easily leads to fatigue damage, fractures, and leakage failures in mechanical parts such as transmission components, hydraulic systems, and traveling mechanisms.

[0005] Mining machinery operates in underground tunnels, which are narrow, enclosed, and poorly ventilated. The high humidity and temperature conditions in these tunnels increase the likelihood of damage to the machinery's components. Underground coal mining and tunneling processes are often accompanied by risks such as roof collapses, rockfalls, and other hazards. The equipment is frequently subjected to impacts, compression, and severe vibrations, which can easily lead to frame deformation, loosening of connecting bolts, and damage to mechanical components such as the transmission system.

[0006] Existing coal mine machinery repair machines only provide a workbench with load-bearing capacity. Their structural design is relatively simple, lacking an effective positioning and clamping mechanism for the parts to be repaired. When repairing heavy components of open-pit or underground coal mine machinery, the large size and weight of these components, coupled with the presence of coal dust and oil on their surfaces, result in a lack of reliable frictional support between the components and the workbench. During disassembly, repair, or assembly, the components are prone to relative sliding and random wobbling, severely interfering with the stability and precision of the repair operation, significantly reducing repair efficiency, and posing potential safety risks. Furthermore, existing coal mine machinery repair machines lack angle adjustment capabilities. The complex components of coal mine machinery have internal structures, access ports, and stress points distributed in various orientations and angles. Without the ability to adjust the component's orientation, repair personnel can only passively adapt to a fixed viewing angle. This makes it difficult to efficiently repair some hidden or difficult parts, sometimes requiring additional auxiliary means to change the component's orientation. This not only increases the complexity of the work process but also further prolongs downtime for maintenance, failing to meet the technical requirements of efficient and rapid repair of modern coal mine equipment.

[0007] In summary, there is an urgent need for a coal mine machinery repair machine with a clamping structure and its operation method to solve the problems existing in the current technology. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] In view of the shortcomings and deficiencies of existing technology, such as the parts placed on the maintenance machine being prone to shaking and inconvenient to maintain, and the parts being unable to rotate to the required angle according to maintenance needs, this invention provides a coal mine machinery maintenance machine with a clamping structure and its operating method, which solves the technical problems existing in traditional equipment and methods.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0012] In a first aspect, embodiments of the present invention provide a coal mine machinery repair machine with a clamping structure, including a workbench and support legs, characterized in that it further includes: a controller, a drive structure and an adjustment structure, a first slide groove is provided above the workbench, the drive structure is disposed inside the first slide groove, the adjustment structure is fixedly installed above the drive structure, and the controller is disposed at the front of the workbench and is connected to the drive structure and the adjustment structure respectively.

[0013] The drive structure includes a first threaded rod extending laterally along the first slide groove, a first motor, a gear set, and a first sliding block. The output end of the first motor is connected to the first threaded rod through the gear set. The two ends of the first threaded rod are respectively connected to two first sliding blocks through threads. An adjustment structure is fixedly connected above the first sliding block.

[0014] The adjustment structure includes a sliding seat, a second sliding groove, a second motor, a second threaded rod, a second sliding block, a rotating structure, and a clamping plate. The sliding seat is fixed above the first sliding block. The second sliding groove is provided on the side of the sliding seat. The second motor is fixed above the sliding seat. The output end of the second motor is connected to the second threaded rod. The second threaded rod extends along the longitudinal direction of the second sliding groove and is threadedly connected to the second sliding block. One end of the rotating structure is fixed to the second sliding block, and the other end is rotatably connected to the clamping plate.

[0015] This invention relates to a coal mine machinery repair machine with a clamping structure. Through its drive and adjustment structures, it solves the problem in existing technologies where parts placed on repair machines are prone to shaking and are inconvenient to repair, thereby improving the convenience and efficiency of repair.

[0016] Optionally, the rotating structure includes a mounting block, a third motor, a worm, a rotating rod, and a worm wheel. The mounting block is fixed on the second sliding block, the third motor is fixed on the top of the mounting block, the output shaft of the third motor is connected to the worm, the worm is disposed inside the mounting block, and the worm is meshed and rotatably connected to the worm wheel. One end of the rotating rod is fixedly connected to the worm wheel, and the other end is fixedly connected to the clamping plate.

[0017] Optionally, the gear set includes a first bevel gear and a second bevel gear arranged perpendicularly to each other. The output end of the first motor is connected to the first bevel gear, and the first bevel gear and the second bevel gear mesh and drive each other. The first motor drives the first threaded rod to rotate in sequence through the first bevel gear and the second bevel gear.

[0018] Optionally, the second bevel gear is fixed at the middle position of the first threaded rod, and the two first sliding blocks are respectively disposed on both sides of the second bevel gear.

[0019] Optionally, the first threaded rod is a bidirectional threaded rod.

[0020] Optionally, the repair machine further includes a guide rod extending laterally along the first slide groove, the guide rod being disposed within the first slide groove and passing through the two first sliding blocks.

[0021] Optionally, the repair machine further includes a connecting plate, and the sliding seat is reliably connected to the first sliding block by means of the connecting plate.

[0022] Optionally, the repair machine also includes photoelectric sensors, with a plurality of photoelectric sensors disposed on the upper surface of the workbench, and the photoelectric sensors being electrically connected to the controller.

[0023] Optionally, the photoelectric sensors are uniformly arranged at preset equal intervals on the upper surface of the worktable.

[0024] Secondly, embodiments of the present invention provide an operation method for a coal mine machinery repair machine with a clamping structure, comprising the following steps:

[0025] S1: Place the part to be repaired on the preset work position of the workbench to complete the initial positioning of the part;

[0026] S2: The controller sends a control command to the first motor. The output shaft of the first motor drives the bidirectional threaded rod to rotate through the first bevel gear and the second bevel gear. The two first sliding blocks respectively set at both ends of the bidirectional threaded rod slide towards each other along the bidirectional threaded rod, synchronously driving the adjustment structure to move towards each other, forming a symmetrical clamping of the parts.

[0027] S3: When the height of the component to be repaired needs to be adjusted, the controller sends a control command to the second motor. The output shaft of the second motor drives the threaded rod to rotate and drives the second sliding block to slide. The second sliding block drives the clamped component to rise and fall synchronously through the rotating structure and the clamping plate.

[0028] S4: When the part to be repaired needs to be adjusted in angle, the controller sends a control command to the third motor. The output shaft of the third motor drives the worm to rotate. The worm and the worm wheel form a meshing transmission. The rotational motion of the worm wheel is transmitted to the rotating rod. The rotating rod rotates around its own axis, causing the clamping plate and the clamped part to rotate circumferentially.

[0029] (III) Beneficial Effects

[0030] This invention discloses a coal mine machinery repair machine with a clamping structure, which effectively solves the technical problems of unstable clamping and inconvenient angle adjustment in the repair of existing coal mine machinery parts. It is suitable for the operation requirements of coal mine machinery parts that are large in size, heavy in weight, and difficult to repair. The overall structure is reasonably designed and easy to operate, and has the following beneficial effects:

[0031] 1. The present invention is a coal mine machinery repair machine with a clamping structure, which effectively solves the technical pain points of unstable clamping and inconvenient angle adjustment in the existing coal mine machinery parts repair. It is suitable for the operation needs of coal mine machinery parts that are large in size, heavy in weight and difficult to repair. The overall structure is reasonably designed and easy to operate.

[0032] 2. This invention allows for flexible adjustment of component repair angles to meet complex repair needs. When component repair angles need adjustment, the controller sequentially operates the second and third motors. The second motor drives the threaded rod to rotate, causing the second sliding block to slide threadedly, thereby raising and lowering the mounting block, clamping plate, and clamped component. The component can be adjusted to a suitable height according to repair requirements. Subsequently, the third motor drives the worm gear and worm wheel to mesh and rotate. The worm wheel drives the rotating rod to rotate stably through the second operating groove, thereby causing the clamping plate and component to rotate synchronously, achieving flexible adjustment of the component repair angle. Without the need for manual disassembly or flipping of components, concealed and difficult-to-inspect parts of the components can be exposed, reducing the workload of maintenance personnel. It adapts to the multi-angle repair needs of coal mine machinery components of different specifications and structures, further improving repair convenience and efficiency.

[0033] 3. The overall transmission structure of this invention is stable and reliable, adaptable to the harsh maintenance environment of coal mines. All transmission components work together seamlessly, ensuring high transmission accuracy and stability. The guide rod and second operating groove respectively guarantee the smoothness of clamping and rotational movements, avoiding motion interference. The entire clamping and angle adjustment process is centrally operated by the controller, achieving a high degree of automation and convenient operation, eliminating the need for complex manual assistance. It can adapt to the harsh environment of coal mine maintenance sites with high dust levels and limited working space, extending the equipment's service life and reducing the maintenance costs of the equipment itself. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the coal mine machinery repair machine with a clamping structure according to the present invention;

[0035] Figure 2 This is a longitudinal cross-sectional schematic diagram of the coal mine machinery repair machine with clamping structure according to the present invention;

[0036] Figure 3 This is a top view schematic diagram of the coal mine machinery repair machine with clamping structure according to the present invention;

[0037] Figure 4 This is a schematic diagram of the adjustment structure of the coal mine machinery repair machine with clamping structure according to the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1: Workbench; 2: Support leg; 3: Controller; 4: Drive structure; 401: First slide groove; 402: First motor; 403: First bevel gear; 404: Bidirectional threaded rod; 405: Second bevel gear; 406: Guide rod; 407: First sliding block; 5: Adjustment structure; 501: Connecting plate; 502: Sliding seat; 503: Second slide groove; 504: Second motor; 505: Threaded rod; 506: Second sliding block; 507: Mounting block; 508: Second operating groove; 509: Third motor; 510: Worm gear; 511: Rotating rod; 512: Worm wheel; 513: Clamping plate. Detailed Implementation

[0040] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "up," "down," "left," and "right" are used interchangeably. Figure 1 The orientation is for reference. To better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0041] Example 1:

[0042] like Figures 1-3 As shown, the coal mine machinery repair machine with clamping structure of the present invention includes a workbench 1, a support leg 2, a controller 3, a drive structure 4 and an adjustment structure 5. A first slide groove 401 is provided above the workbench 1. The drive structure 4 is disposed inside the first slide groove 401. The adjustment structure 5 is fixedly installed above the drive structure 4. The controller 3 is disposed at the front of the workbench 1 and is connected to the drive structure 4 and the adjustment structure 5 respectively.

[0043] The drive structure 4 includes a bidirectional threaded rod 404 extending laterally along the first slide groove 401, a first motor 402, a first bevel gear 403 and a second bevel gear 405 arranged perpendicularly to each other, a guide rod 406 extending laterally along the first slide groove 401, and a first sliding block 407. The output end of the first motor 402 is connected to the first bevel gear 403, and the first bevel gear 403 and the second bevel gear 405 mesh and drive each other. The first motor 402 drives the bidirectional threaded rod 404 in sequence through the first bevel gear 403 and the second bevel gear 405. The two ends of the bidirectional threaded rod 404 are respectively connected to the two first sliding blocks 407 by threads. An adjustment structure 5 is fixedly connected above the first sliding blocks 407. The guide rod 406 is disposed in the first slide groove 401 and passes through the two first sliding blocks 407.

[0044] The adjustment structure 5 includes a connecting plate 501, a sliding seat 502, a second sliding groove 503, a second motor 504, a second threaded rod 505, a second sliding block 506, a rotating structure, and a clamping plate 513. The sliding seat 502 is fixedly connected to the first sliding block 407 through the connecting plate 501. The connecting plate 501 serves as the basic mounting carrier for the adjustment structure 5, and its main function is to achieve a reliable connection and transmission transition between the adjustment mechanism 5 and the drive structure 4. The sliding seat 502 has a second sliding groove 503 on its side. The second motor 504 is fixed above the sliding seat 502. The output end of the second motor 504 is connected to the second threaded rod 505, which extends along the longitudinal direction of the second sliding groove 503. The second threaded rod 505 is threadedly connected to the second sliding block 506. One end of the rotating structure is fixed to the second sliding block 506, and the other end is rotatably connected to the clamping plate 513.

[0045] The rotating structure includes a mounting block 507, a third motor 509, a worm gear 510, a rotating rod 511, and a worm wheel 512. The mounting block 507 is fixed on the second sliding block 506. The third motor 509 is fixed on the top of the mounting block 507. The output shaft of the third motor 509 is connected to the worm gear 510. The worm gear 510 is disposed inside the mounting block 507. The worm gear 510 is meshed and rotatably connected with the worm wheel 512. One end of the rotating rod 511 is fixedly connected to the worm wheel 512, and the other end is fixedly connected to the clamping plate 513.

[0046] The operation method of the coal mine machinery repair machine with clamping structure in this embodiment includes the following steps:

[0047] S1: Place the part to be repaired on the preset station of workbench 1 to complete the initial positioning of the part;

[0048] S2: The operator sends a control command to the first motor 402 through the controller 3. The output shaft of the first motor 402 drives the first bevel gear 403 to rotate. The first bevel gear 403 meshes with the second bevel gear 405 to drive the second bevel gear 405 to rotate. The second bevel gear 405 drives the bidirectional threaded rod 404 to rotate around its own axis. The bidirectional threaded rod 404 adopts a bidirectional threaded structure design. The bidirectional threaded rod 404 drives the symmetrically arranged left first sliding block 407 and right first sliding block 407 to slide towards each other along the axial direction of the bidirectional threaded rod 404. The guide rod 406 is arranged parallel to the bidirectional threaded rod 404 and guides the first sliding block 407 to prevent the first sliding block 407 from circumferentially deflecting during the sliding process, thereby improving the sliding accuracy and synchronization of the two first sliding blocks 407. The left first sliding block 407 and right first sliding block 407 slide towards each other, synchronously driving the adjustment structure 5 fixedly connected to them to move towards each other. The adjustment structure 5 drives the two oppositely arranged clamping plates 513 to move synchronously towards the center of the worktable 1. When the two clamping plates 513 move to both sides of the part to be repaired, they form symmetrical clamping of the part, realizing the fixation of the part on the worktable 1, providing a stable clamping and positioning basis for subsequent maintenance operations, and solving the technical problems of traditional maintenance equipment lacking a dedicated clamping structure and easy displacement of parts.

[0049] After the parts are clamped and fixed, if the maintenance height of the parts needs to be adjusted, the operator sends a control command to the second motor 504 through the controller 3. The output shaft of the second motor 504 drives the threaded rod 505 to rotate. The threaded rod 505 drives the second sliding block 506 to slide along the axial direction of the threaded rod 505. The second sliding block 506 simultaneously drives the mounting block 507 and the clamping plate 513 to move in the vertical direction, thereby driving the clamped parts to rise and fall synchronously. When the parts move to the preset maintenance height, the second motor 504 is stopped by the controller 3 to complete the height adjustment of the parts and adapt to the height requirements of different maintenance stations.

[0050] If the maintenance angle of a component needs to be adjusted, the operator sends a control command to the third motor 509 via the controller 3. The output shaft of the third motor 509 rotates, driving the worm gear 510 to rotate. The worm gear 510 and the worm wheel 512 mesh and transmit the rotational motion of the worm wheel 512 to the rotating rod 511, driving the rotating rod 511 to rotate around its own axis. The rotating rod 511 rotates with the mounting block 507 through the second operating groove 508, ensuring the rotational stability of the rotating rod 511. The rotation of the rotating rod 511 synchronously drives the clamping plate 513 and the clamped component to rotate circumferentially. The operator can control the start, stop, forward and reverse rotation of the third motor 509 via the controller 3 according to maintenance needs, adjusting the component to any preset maintenance angle, realizing multi-angle maintenance of the component without repeated manual disassembly and adjustment, greatly improving maintenance efficiency and operational convenience.

[0051] This device achieves automated positioning, clamping, height and angle adjustment of the parts to be repaired through the coordinated operation of clamping, height adjustment and angle adjustment. It has a compact structure and stable and reliable transmission. It can be adapted to the repair needs of parts of various specifications and effectively solves the technical pain points of traditional repair equipment such as poor positioning accuracy, inconvenient adjustment and low operation efficiency.

[0052] Example 2:

[0053] In this embodiment, the coal mine machinery repair machine with a clamping structure further includes photoelectric sensors in addition to those in Embodiment 1. A plurality of photoelectric sensors are evenly arranged at predetermined equal intervals on the upper surface of the workbench 1. The photoelectric sensors are electrically connected to the controller 3. The photoelectric sensors are used to detect the relevant dimensional parameters of the parts to be repaired in real time, providing a control basis for the lifting action before angle adjustment of the parts to be repaired. The specific implementation process is as follows:

[0054] After the coal mining machinery parts to be repaired are placed in the preset bearing area of ​​workbench 1, the photoelectric sensor on the upper surface of workbench 1 is activated simultaneously. By detecting the coverage area of ​​the parts, the horizontal contour of the parts is identified, and then the maximum width L in the longitudinal direction of the parts is accurately measured. After receiving the maximum width data transmitted by the photoelectric sensor, the controller 3 calculates the preset lifting height H. The preset lifting height H is set to half of the maximum width L in the longitudinal direction of the parts, that is, H=L / 2, so as to ensure that the edges of the parts will not interfere with the workbench 1 when the parts rotate.

[0055] After the parts to be repaired are clamped and fixed by the clamping plate 513, if it is necessary to adjust the repair angle of the parts, the rotation angle command can be input through the controller 3. At this time, the photoelectric sensor further detects the minimum distance h between the bottom of the parts and the upper surface of the worktable 1, and transmits the minimum distance h to the controller 3 in real time.

[0056] After receiving the minimum distance h, the controller 3 compares it with the preset lifting height H. When the detected minimum distance h is greater than the preset lifting height H, it is determined that the bottom and edge of the component will not collide with the worktable 1 during the rotation. At this time, the controller 3 directly controls the third motor 509 to start. The third motor 509 drives the worm gear 510 to rotate. The worm gear 510 meshes with the worm wheel 512, which in turn drives the rotating rod 511 to rotate through the second operating groove 508. The rotating rod 511 synchronously drives the clamping plate 513 and the clamped component to rotate to the preset maintenance angle, thus completing the angle adjustment.

[0057] When the detected minimum distance h is less than the preset lifting height H, it is determined that there is a risk of interference with the worktable 1 during the rotation of the component. At this time, the controller 3 first sends a control command to the second motor 504. The second motor 504 drives the threaded rod 505 to rotate, and the threaded rod 505 drives the second sliding block 506 to slide upward in the vertical direction until the second sliding block 506 lifts the component to the preset lifting height H, ensuring that the distance between the bottom of the component and the worktable 1 meets the safe rotation requirements. After the second sliding block 506 moves into position, the controller 3 then controls the third motor 509 to start, driving the clamping plate 513 and the component to rotate according to the above transmission process, completing the adjustment operation of the maintenance angle.

[0058] In this embodiment, the photoelectric sensor is positioned within the effective bearing area of ​​the workbench 1, avoiding the movement trajectory of the first sliding block 407, and the sensor detection end face is not higher than the upper surface of the workbench 1 to avoid damage to the sensor when the parts are placed, while ensuring the accuracy of the detection data and ensuring a safe and smooth angle adjustment process.

[0059] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coal mine machinery repair machine with a clamping structure, comprising a workbench (1) and support legs (2), characterized in that... It also includes: controller (3), drive structure (4) and adjustment structure (5). A first slide groove (401) is provided above the worktable (1). The drive structure (4) is located inside the first slide groove (401). The adjustment structure (5) is fixedly installed above the drive structure (4). The controller (3) is located at the front of the worktable (1) and is connected to the drive structure (4) and the adjustment structure (5) respectively. The drive structure (4) includes a first threaded rod extending laterally along the first slide groove (401), a first motor (402), a gear set and a first sliding block (407). The output end of the first motor (402) is connected to the first threaded rod through the gear set. The two ends of the first threaded rod are respectively connected to the two first sliding blocks (407) through threads. An adjustment structure (5) is fixedly connected above the first sliding block (407). The adjustment structure (5) includes a sliding seat (502), a second sliding groove (503), a second motor (504), a second threaded rod (505), a second sliding block (506), a rotating structure, and a clamping plate (513). The sliding seat (502) is fixed above the first sliding block (407). The second sliding groove (503) is provided on the side of the sliding seat (502). The second motor (504) is fixed above the sliding seat (502). The output end of the second motor (504) is connected to the second threaded rod (505). The second threaded rod (505) extends along the longitudinal direction of the second sliding groove (503). The second threaded rod (505) is connected to the second sliding block (506) by a thread. One end of the rotating structure is fixed to the second sliding block (506), and the other end is rotatably connected to the clamping plate (513).

2. The coal mine machinery repair machine with a clamping structure according to claim 1, characterized in that: The rotating structure includes a mounting block (507), a third motor (509), a worm (510), a rotating rod (511), and a worm wheel (512). The mounting block (507) is fixed on the second sliding block (506). The third motor (509) is fixed on the top of the mounting block (507). The output shaft of the third motor (509) is connected to the worm (510). The worm (510) is located inside the mounting block (507). The worm (510) is meshed and rotated with the worm wheel (512). One end of the rotating rod (511) is fixedly connected to the worm wheel (512), and the other end is fixedly connected to the clamping plate (513).

3. The coal mine machinery repair machine with a clamping structure according to claim 2, characterized in that: The gear set includes a first bevel gear (403) and a second bevel gear (405) arranged perpendicularly to each other. The output end of the first motor (402) is connected to the first bevel gear (403). The first bevel gear (403) and the second bevel gear (405) mesh and drive each other. The first motor (402) drives the first threaded rod to rotate in sequence through the first bevel gear (403) and the second bevel gear (405).

4. The coal mine machinery repair machine with a clamping structure according to claim 3, characterized in that: The second bevel gear (405) is fixed at the middle position of the first threaded rod, and the two first sliding blocks (407) are respectively disposed on both sides of the second bevel gear (405).

5. The coal mine machinery repair machine with a clamping structure according to claim 4, characterized in that: The first threaded rod is a bidirectional threaded rod.

6. The coal mine machinery repair machine with a clamping structure according to claim 5, characterized in that: The repair machine also includes a guide rod (406) extending laterally along the first slide groove (401), the guide rod (406) being disposed within the first slide groove (401) and passing through the two first sliding blocks (407).

7. The coal mine machinery repair machine with a clamping structure according to claim 6, characterized in that: The repair machine further includes a connecting plate (501), and the sliding seat (502) is reliably connected to the first sliding block (407) by means of the connecting plate (501).

8. The coal mine machinery repair machine with a clamping structure according to claim 1, characterized in that: The repair machine also includes photoelectric sensors. Several photoelectric sensors are provided on the upper surface of the workbench (1), and the photoelectric sensors are electrically connected to the controller (3).

9. The coal mine machinery repair machine with a clamping structure according to claim 8, characterized in that: The photoelectric sensors are evenly arranged at a preset equal interval on the upper surface of the workbench (1).

10. A method for operating a coal mine machinery repair machine with a clamping structure, using the coal mine machinery repair machine with a clamping structure as described in any one of claims 1-7, comprising the following steps: S1: Place the part to be repaired on the preset work position of the workbench to complete the initial positioning of the part; S2: The controller sends a control command to the first motor. The output shaft of the first motor drives the bidirectional threaded rod to rotate through the first bevel gear and the second bevel gear. The two first sliding blocks respectively set at both ends of the bidirectional threaded rod slide towards each other along the bidirectional threaded rod, synchronously driving the adjustment structure to move towards each other, forming a symmetrical clamping of the parts. S3: When the height of the component to be repaired needs to be adjusted, the controller sends a control command to the second motor. The output shaft of the second motor drives the threaded rod to rotate and drives the second sliding block to slide. The second sliding block drives the clamped component to rise and fall synchronously through the rotating structure and the clamping plate. S4: When the part to be repaired needs to be adjusted in angle, the controller sends a control command to the third motor. The output shaft of the third motor drives the worm to rotate. The worm and the worm wheel form a meshing transmission. The rotational motion of the worm wheel is transmitted to the rotating rod. The rotating rod rotates around its own axis, causing the clamping plate and the clamped part to rotate circumferentially.

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