A processing structure of a driving wheel of a construction machine

Abstract

This invention provides a machining structure for drive wheels in engineering machinery, relating to the field of drive wheel machining technology. The invention includes a transmission assembly mounted on a worktable, on which a drive wheel to be machined is placed. A limiting component is installed on the worktable near the transmission assembly to limit the drive wheel and prevent it from detaching from the transmission assembly. A grinding component is also mounted on the worktable for grinding the inner edge of the drive wheel. This invention, through the coordinated operation of the transmission assembly, limiting component, and grinding component, enables mechanized and automated grinding of the inner edge of the drive wheel in engineering machinery, replacing traditional manual grinding. This effectively reduces the labor intensity of operators, avoids precision fluctuations caused by manual operation, improves grinding efficiency and product qualification rate, and also reduces the safety risks and occupational health hazards associated with manual grinding.

Description

Technical Field

[0001] This invention relates to the field of drive wheel machining technology, and in particular to a machining structure for drive wheels of engineering machinery. Background Technology

[0002] The drive wheel of construction machinery is a core transmission component of the tracked walking system. The machining quality of its inner wall edge directly affects the assembly accuracy of the drive wheel and its supporting components, and also relates to the stability and service life of the entire machine. After the drive wheel is cast and rough machined, the inner wall edge usually has casting flash, machining burrs, and sharp edges remaining. These must be repaired through a grinding process to meet the requirements of subsequent assembly and use.

[0003] Currently, most grinding operations on the inner edge of drive wheels in the industry rely on operators using handheld angle grinders. This method is labor-intensive, inefficient, and the grinding quality is highly dependent on the operator's experience, easily leading to problems such as over-grinding in certain areas and uneven edge trimming. This results in poor product consistency and makes it difficult to meet the precision requirements of mass production. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a machining structure for engineering machinery drive wheels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a machining structure for a drive wheel of engineering machinery, including a worktable, a transmission assembly mounted on the worktable, a drive wheel to be machined placed on the transmission assembly, a limiting assembly installed on the worktable near the transmission assembly, the limiting assembly being used to limit the drive wheel to be machined and prevent it from disengaging from the transmission assembly, a grinding assembly mounted on the worktable for grinding the inner edge of the drive wheel to be machined, the limiting assembly including an adjusting component, a locking component, and a limiting roller, the adjusting component being used to adjust the spacing between the limiting rollers to adapt to drive wheels to be machined of different widths, and the locking component being used to limit the position of the limiting rollers after rotation to adapt to drive wheels to be machined of different lengths.

[0006] Furthermore, the adjusting component includes columns, columns are symmetrically mounted on the worktable, connecting rods are symmetrically mounted between two columns, threaded rods are rotatably connected between two columns, movable plates are symmetrically slidably connected to the two connecting rods, the threaded rods are threadedly connected to the movable plates, and convex plates are symmetrically mounted on the movable plates. The convex plates are rotatably connected to limit rollers by means of locking components.

[0007] The aforementioned components achieve the following effects: the threaded rod, acting as a transmission component, converts rotational motion into linear motion of the moving plate through the threaded joint, resulting in high transmission accuracy and controllable stroke. The convex plate is vertically fixed to the inner surface of the moving plate, extending outward to provide ample installation space. This provides a supporting base for the installation of the locking components and the limiting rollers, while simultaneously preventing motion interference between the limiting rollers and the moving plate and connecting rods during adjustment, ensuring smooth adjustment and a wide range of adjustment angles.

[0008] Furthermore, the threaded rod is symmetrically provided with opposite threads, and the two movable plates are respectively located at the opposite threads of the threaded rod.

[0009] The effect achieved by the above components is that the single threaded rod is provided with bidirectional opposite threaded sections, so that when the threaded rod rotates in a single direction, the two moving plates can move synchronously towards each other to reduce the gap, or move synchronously away from each other to increase the gap. Only one threaded rod needs to be rotated to complete the gap adjustment of the two limit rollers simultaneously, without the need to adjust the limit mechanisms on both sides separately, which greatly simplifies the adjustment operation steps and shortens the tooling debugging time.

[0010] Furthermore, the locking component includes a shaft, which is rotatably connected to the convex plate. A ratchet gear is installed at one end of the shaft. A connecting plate is rotatably connected to the convex plate via the shaft. The connecting plate is connected to the limiting roller via bolts. A limiting block is installed on the convex plate. A guide rod is slidably connected to the limiting block. A pawl is installed at the end of the guide rod away from the limiting block. A spring is sleeved on the guide rod, with its two ends connected to the pawl and the limiting block, respectively.

[0011] The aforementioned components achieve the following effects: the shaft, passing through the bore of the convex plate, serves as a fulcrum for rotation, driving the connecting plate and the limiting roller to rotate synchronously. This allows for flexible adjustment of the limiting roller's tilt angle, adjusting the contact angle of the limiting roller according to the diameter of the drive wheel to be processed. This increases the contact area between the limiting roller surface and the drive wheel side, improving the limiting fit and stability, and preventing indentations on the drive wheel surface caused by point contact. The ratchet and pawl form a one-way self-locking structure; during adjustment, pulling the guide rod outward will disengage the pawl from the ratchet gear groove, releasing the locked state and allowing the shaft to rotate freely.

[0012] Furthermore, the transmission assembly includes a mounting base, and four mounting bases are mounted on the worktable, which are arranged symmetrically in pairs. A guide roller is rotatably connected between two of the mounting bases. A motor is mounted on the worktable, and the motor drives two guide rollers to rotate via a timing pulley and a timing belt.

[0013] The aforementioned components achieve the following effects: the two guide rollers are arranged in parallel, jointly supporting the outer circumference of the drive wheel to be processed. This provides a large supporting area and uniform force distribution, allowing for the stable placement of drive wheels of different diameters. Motor No. 1 serves as the power source, transmitting power synchronously to the ends of the two guide rollers via a synchronous transmission mechanism consisting of a synchronous pulley and a synchronous belt. This drives the two guide rollers to rotate at the same speed and in the same direction. The friction between the guide rollers and the drive wheel ensures smooth, slip-free, and uninterrupted rotation of the drive wheel, preventing wobbling caused by the speed difference between the two guide rollers, which would otherwise affect the smoothness and precision of the polished surface.

[0014] Furthermore, the grinding assembly is provided with an assembly plate, on which a plurality of guide wheels are rotatably connected. On the other side of the assembly plate, the guide wheels are driven to rotate by a driving component. An arc-shaped mounting ring is slidably connected between the guide wheels, and a grinding component is mounted on the arc-shaped mounting ring.

[0015] The effect achieved by the above components is as follows: several guide wheels are evenly distributed along a preset arc-shaped trajectory, and the wheel surfaces together form an arc-shaped slide that matches the arc-shaped mounting ring. This provides circumferential clamping and motion guidance for the arc-shaped mounting ring, allowing it to slide smoothly along the set arc-shaped trajectory. This, in turn, drives the grinding part to make an arc-shaped feed motion against the inner wall edge of the drive wheel, perfectly matching the arc-shaped inner wall contour of the drive wheel. This ensures that the grinding part and the inner wall of the drive wheel maintain a uniform and stable contact pressure during the grinding process, preventing local over-grinding or under-grinding, and effectively improving the uniformity and processing quality of the inner wall edge grinding.

[0016] Furthermore, the driving component includes a No. 3 motor, a No. 2 synchronous pulley, and a No. 2 synchronous belt. The No. 3 motor is installed on the other side of the assembly plate, and the No. 2 synchronous pulley is installed on the rotation shaft of the two guide wheels. The No. 3 motor drives the two guide wheels to rotate by means of the No. 2 synchronous pulley and the No. 2 synchronous belt.

[0017] Furthermore, the grinding component includes a second motor and a grinding wheel. The second motor is mounted on the arc-shaped mounting ring, and the output shaft of the second motor drives the grinding wheel to rotate via a coupling.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, through the coordinated operation of the transmission component, the limiting component and the grinding component, the mechanized automatic grinding operation of the inner wall edge of the drive wheel of engineering machinery can be realized, replacing the traditional manual hand-held grinding method, effectively reducing the labor intensity of operators, avoiding the precision fluctuation problem caused by manual operation, improving the efficiency of grinding and processing and the product qualification rate, while also reducing the safety risks and occupational health hazards caused by manual grinding.

[0019] 2. In this invention, the limiting component integrates both spacing and angle adjustment functions. The spacing between the two limiting rollers can be quickly adjusted via the adjusting component to accommodate drive wheel workpieces of different widths. The tilt angle of the limiting rollers can be flexibly adjusted and locked via the locking component to accommodate drive wheel workpieces of different diameters. It can accommodate the processing of various drive wheel specifications without the need to replace with dedicated limiting fixtures, effectively reducing tooling investment costs, shortening the debugging time for workpiece changeovers, and improving the versatility of the equipment and the flexibility of production scheduling.

[0020] 3. In this invention, a grinding feed structure using a guide wheel and an arc-shaped mounting ring is adopted, which can drive the grinding part to move along an arc-shaped trajectory that matches the inner wall of the drive wheel. This ensures that the grinding wheel always maintains a stable contact pressure against the edge of the inner wall of the drive wheel, resulting in uniform grinding coverage. It also prevents local over-grinding or grinding blind spots, effectively improving the grinding smoothness and processing consistency of the inner wall edge and ensuring the processing quality of the drive wheel.

[0021] 4. In this invention, the locking component adopts a self-locking structure with a pawl and a ratchet gear. The angle adjustment operation is convenient, and the locking state is firm and reliable. The equipment vibration generated during the grinding process is not likely to cause the limiting angle to loosen. It can effectively avoid the problem of workpiece displacement or slippage from the work station, and improve the stability of equipment operation and processing safety. Attached Figure Description

[0022] Figure 1 This invention provides a three-dimensional structural diagram of a machining structure for a drive wheel of engineering machinery; Figure 2 This invention provides a three-dimensional structural diagram of a machining structure for a drive wheel of engineering machinery from another angle. Figure 3 This invention provides a schematic diagram of the transmission assembly of a machining structure for a drive wheel in engineering machinery. Figure 4 This invention provides a schematic diagram of a limiting component for the machining structure of a drive wheel in engineering machinery. Figure 5 This invention proposes a machining structure for drive wheels of engineering machinery. Figure 4 A schematic diagram of the structure at point A in the middle.

[0023] Legend: 1. Workbench; 2. Limiting assembly; 21. Column; 22. Connecting rod; 23. Moving plate; 231. Protruding plate; 24. Threaded rod; 25. Locking component; 251. Shaft; 252. Ratchet; 253. Limiting block; 254. Guide rod; 255. Spring; 256. Pawl; 26. Limiting roller; 261. Bolt; 262. Connecting plate; 3. Transmission assembly; 31. Mounting base; 32. Guide roller; 33. First synchronous pulley; 34. First synchronous belt; 35. First motor; 4. Grinding assembly; 41. Assembly plate; 42. Guide wheel; 43. Arc-shaped mounting ring; 44. Grinding wheel; 45. Second motor; 46. Driving component; 461. Third motor; 462. First synchronous pulley; 463. Second synchronous belt; 5. Drive wheel to be processed. Detailed Implementation

[0024] like Figure 1-5 As shown, a machining structure for a drive wheel of engineering machinery is set on a workbench 1. The workbench 1 is a horizontally arranged rigid platform with a flat surface and sufficient load-bearing strength, providing a stable installation foundation for each functional component. During the machining process, the overall structure can remain stable and will not deform due to vibration during equipment operation.

[0025] A transmission assembly 3 is fixedly mounted on the surface of the workbench 1. The transmission assembly 3 supports the drive wheel 5 to be processed and drives it to rotate. The transmission assembly 3 includes four mounting seats 31, which are arranged in pairs and symmetrically fixed on the left and right sides of the workbench 1. The two mounting seats 31 in each group are arranged at intervals in the front-back direction. A guide roller 32 is rotatably connected between the two mounting seats 31 in the same group. The two ends of the guide roller 32 are respectively mounted in the mounting holes of the corresponding mounting seats 31 through bearings. The two guide rollers 32 are parallel to each other and are in the same horizontal plane. A first motor 35 is also fixedly mounted on the surface of the workbench 1. The output shaft of the first motor 35 is set towards the end of the guide roller 32. A first synchronous pulley 33 is fixedly mounted on the same end of the two guide rollers 32. A first synchronous belt 34 is sleeved on the outer side of the two first synchronous pulleys 33. The output shaft of the first motor 35 is connected to one of the first synchronous pulleys 33. The drive wheel 5 to be processed is placed above the two guide rollers 32. The outer surface of the drive wheel 5 to be processed is in contact with the roller surfaces of the two guide rollers 32 at the same time. After the first motor 35 is started, it can drive the two guide rollers 32 to rotate in the same direction at the same speed through the transmission cooperation of the first synchronous pulley 33 and the first synchronous belt 34. The guide rollers 32 drive the drive wheel 5 to be processed to rotate at a constant speed around its own axis by relying on the friction between the roller surface and the drive wheel 5 to be processed.

[0026] A limiting component 2 is installed on the worktable 1 near the transmission component 3. The limiting component 2 is located on the outer side of the transmission component 3 and is used to laterally limit the drive wheel 5 to be processed, preventing the drive wheel 5 from axially moving during the rotation and grinding process and detaching from the guide roller 32. The limiting component 2 includes an adjusting component, a locking component 25, and a limiting roller 26. The adjusting component is used to adjust the distance between the two limiting rollers 26 to accommodate drive wheels 5 of different widths. The locking component 25 is used to lock the angular position of the limiting roller 26 after swinging, and is adapted to drive wheels 5 of different diameters.

[0027] The adjusting component includes two uprights 21, which are symmetrically and vertically fixed on the workbench 1, located on the left and right sides of the transmission assembly 3, respectively. Two connecting rods 22 are symmetrically fixed between the upper parts of the two uprights 21, and both connecting rods 22 are horizontally arranged and parallel to each other. A threaded rod 24 is rotatably connected between the two uprights 21, located below the two connecting rods 22. Both ends of the threaded rod 24 are respectively mounted on the corresponding uprights 21 via bearings, and one end of the threaded rod 24 extends through the outer wall of the upright 21 for easy gripping and rotation by the operator. Two movable plates 23 are symmetrically fitted on the two connecting rods 22. The upper part of the movable plates 23 has sliding holes adapted to the connecting rods 22, and the movable plates 23 are slidably connected to the connecting rods 22 through the sliding holes, allowing for smooth sliding along the axial direction of the connecting rods 22. The threaded rod 24 passes through the lower part of the two movable plates 23, and the threaded rod 24 and the movable plates 23 are in a threaded drive engagement. The threaded rod 24 has two symmetrically machined threaded sections with opposite directions of rotation. Two movable plates 23 are respectively installed on the two opposite threaded sections. When the threaded rod 24 is rotated, the two movable plates 23 are circumferentially limited by the connecting rod 22 and will not rotate synchronously with the threaded rod 24. Instead, they move synchronously towards each other or synchronously away from each other along the axial direction of the connecting rod 22. Two protruding plates 231 are fixed on the side of each movable plate 23 facing the transmission assembly 3. The two protruding plates 231 are arranged at intervals in the front-back direction. Each protruding plate 231 is equipped with a set of locking elements 25. The protruding plates 231 are rotatably connected to the limit rollers 26 through the locking elements 25.

[0028] The locking component 25 includes a shaft 251, which is horizontally mounted on the plate of the protruding plate 231. The shaft 251 and the protruding plate 231 are rotatably fitted. One end of the shaft 251 extending outward from the outer side of the moving plate 231 extends beyond the surface of the protruding plate 231. A ratchet gear 252 is fixedly installed at this end, and the ratchet gear 252 rotates synchronously with the shaft 251. The other end of the shaft 251 extending outward from the inner surface of the protruding plate 231 extends towards the transmission assembly 3. A connecting plate 262 is fixedly connected to this end, and the surface of the connecting plate 262 is in contact with the end face of the limiting roller 26. The connecting plate 262 and the end of the limiting roller 26 are fastened together by bolts 261. When the shaft 251 rotates, it can drive the limiting roller 26 to swing synchronously through the connecting plate 262, thereby adjusting the tilt angle of the limiting roller 26. A limiting block 253 is fixedly installed on the side of the protruding plate 231 facing the ratchet 252. The limiting block 253 is located below the ratchet 252. A guide rod 254 slides vertically through the limiting block 253 and can reciprocate along its own axis. A pawl 256 is fixed to the upper end of the guide rod 254. The engaging end of the pawl 256 corresponds to the tooth groove of the ratchet 252. A spring 255 is sleeved on the rod of the guide rod 254. The upper end of the spring 255 abuts against the bottom surface of the pawl 256, and the lower end of the spring 255 abuts against the top surface of the limiting block 253. When the spring 255 is in its naturally extended state, it pushes the pawl 256 upward to engage with the tooth groove of the ratchet 252, restricting the rotation of the ratchet 252 and thus locking the swing angle between the shaft 251 and the limiting roller 26. When the guide rod 254 is pulled downward, the pawl 256 can move downward to disengage from the tooth groove of the ratchet 252, releasing the restriction on the rotation of the ratchet 252. At this time, the shaft 251 can rotate freely to adjust the tilt angle of the limiting roller 26.

[0029] A grinding assembly 4 is also mounted on the workbench 1. The grinding assembly 4 is located on one side of the transmission assembly 3 and is used to grind the inner edge of the drive wheel 5 to be processed. The grinding assembly 4 includes a mounting plate 41, which is vertically fixed to the workbench 1. Several guide wheels 42 are rotatably connected to the side of the mounting plate 41 facing the transmission assembly 3. The guide wheels 42 are evenly arranged along a preset arc-shaped trajectory, and the axis of rotation of each guide wheel 42 is perpendicular to the surface of the mounting plate 41. An arc-shaped mounting ring 43 is slidably connected to the guide wheels 42, and the ring body of the arc-shaped mounting ring 43 is embedded in the groove of each guide wheel 42. The guide wheels 42 provide support and guidance for the arc-shaped mounting ring 43, allowing it to slide back and forth only along its own arc-shaped trajectory. A drive component 46 is mounted on the other side of the mounting plate 41. The drive component 46 drives the guide wheels 42 to rotate, thereby causing the arc-shaped mounting ring 43 to move along the trajectory. A grinding component is mounted on the side of the arc-shaped mounting ring 43 facing the transmission assembly 3. The grinding component can move in an arc shape synchronously with the arc-shaped mounting ring 43 to fit the inner edge of the drive wheel 5 to be processed and complete the grinding operation.

[0030] The drive unit 46 includes a third motor 461, a second synchronous pulley 462, and a second synchronous belt 463. The third motor 461 is fixedly mounted on the side of the assembly plate 41 facing away from the transmission assembly 3. The shafts of two guide wheels 42, which serve as driving wheels, pass through the body of the assembly plate 41 and extend to the other side of the assembly plate 41. The ends of the two shafts are respectively fixedly mounted with the second synchronous pulley 462, and the second synchronous belt 463 is fitted on the outer side of the two second synchronous pulleys 462. The output shaft of the third motor 461 is connected to one of the second synchronous pulleys 462. After the third motor 461 is started, it can synchronously drive the two driving guide wheels 42 to rotate through the transmission cooperation between the second synchronous pulley 462 and the second synchronous belt 463. Relying on the friction between the wheel surface of the guide wheel 42 and the arc-shaped mounting ring 43, the arc-shaped mounting ring 43 is driven to slide smoothly along the arc-shaped trajectory defined by the guide wheel 42.

[0031] The grinding component includes a second motor 45 and a grinding wheel 44. The second motor 45 is fixedly mounted on the ring body of the arc-shaped mounting ring 43. The output shaft of the second motor 45 faces the side of the drive wheel 5 to be processed. The end of the output shaft of the second motor 45 is fixedly connected to the rotating shaft of the grinding wheel 44 through a coupling. After the second motor 45 is started, it can directly drive the grinding wheel 44 to rotate at high speed. The wheel surface of the grinding wheel 44 contacts the inner edge of the drive wheel 5 to be processed, and the cutting and grinding are completed through high-speed rotation.

[0032] Working principle: Before use, adjust the state of the limiting component 2 according to the specifications of the drive wheel 5 to be processed. When adjusting the limiting distance, rotate the threaded rod 24. Since the threaded rod 24 has two threads with opposite directions, and the moving plate 23 is limited by the circumferential direction of the connecting rod 22 and cannot rotate synchronously with the threaded rod 24, the two moving plates 23 will move synchronously towards each other or synchronously away from each other along the axial direction of the connecting rod 22, driving the limiting rollers 26 on both sides to move closer or further away from each other until the distance between the two limiting rollers 26 is adapted to the width of the drive wheel 5 to be processed, so that the limiting rollers 26 can fit against the edge of the two end faces of the drive wheel 5 to be processed, completing the limiting adaptation in the width direction.

[0033] When adjusting the angle of the limiting roller 26, pull down the guide rod 254. The guide rod 254 drives the pawl 256 to move downwards synchronously. The spring 255 is compressed and deformed by the pressure of the pawl 256 and the limiting block 253. The pawl 256 disengages from the tooth groove of the ratchet 252, releasing the rotational lock on the ratchet 252 and the shaft 251. At this time, the limiting roller 26 can be manually swung, which drives the shaft 251 and the ratchet 252 to rotate synchronously through the connecting plate 262. This adjusts the tilt angle of the limiting roller 26, allowing the roller surface of the limiting roller 26 to fit against the side of the drive wheel 5 to be processed to the maximum extent, increasing the contact area and improving the stability of the limiting. After the angle adjustment is completed, release the guide rod 254. The compressed spring 255 releases its elastic potential energy, pushing the pawl 256 upwards to reset and re-engage in the corresponding tooth groove of the ratchet 252, locking the rotational position of the ratchet 252, thereby fixing the tilt angle of the limiting roller 26 and completing the adaptation adjustment for workpieces of different diameters.

[0034] During processing, the drive wheel 5 to be processed is placed on two guide rollers 32, so that the outer surface of the drive wheel 5 is in contact with the roller surfaces of the two guide rollers 32 simultaneously, and the two sides are laterally constrained by the limiting rollers 26. Then, the first motor 35 is started. The first motor 35 drives the two guide rollers 32 to rotate in the same direction at the same speed through the synchronous transmission of the first synchronous pulley 33 and the first synchronous belt 34. The guide rollers 32 drive the drive wheel 5 to rotate at a uniform speed around its own axis by the static friction between the roller surface and the drive wheel 5.

[0035] Motors 45 and 461 are started. Motor 45 directly drives the grinding wheel 44 to rotate at high speed through a coupling, providing the linear speed required for grinding and cutting. Motor 461 drives the two drive guide wheels 42 to rotate synchronously through the synchronous transmission of the synchronous pulley 462 and the synchronous belt 463. The guide wheels 42 drive the arc-shaped mounting ring 43 to slide back and forth along the arc-shaped trajectory defined by the guide wheels 42 by the friction between the wheel surface and the arc-shaped mounting ring 43. This, in turn, drives the motor 45 and the grinding wheel 44 to make feed motion along the arc-shaped trajectory, so that the grinding wheel 44 moves in contact with the inner arc contour of the drive wheel 5 to be processed.

[0036] During the grinding process, the grinding wheel 44 rotates at high speed to complete the cutting, while simultaneously moving in an arc-shaped feed motion with the arc-shaped mounting ring 43. This, combined with the uniform rotation of the drive wheel 5 to be processed, creates a composite motion that allows the grinding wheel 44 to fully cover the entire inner edge of the drive wheel 5 to be processed, and ensures uniform grinding contact pressure. This guarantees the smoothness and processing accuracy of the ground surface, while also improving the overall grinding efficiency.

Claims

1. A machining structure for drive wheels of engineering machinery, comprising a worktable (1), characterized in that: The workbench (1) is equipped with a transmission assembly (3), on which a drive wheel (5) to be processed is placed. A limiting assembly (2) is installed on the workbench (1) near the transmission assembly (3). The limiting assembly (2) is used to limit the drive wheel (5) to be processed to prevent it from disengaging from the transmission assembly (3). The workbench (1) is equipped with a grinding assembly (4) for grinding the inner edge of the drive wheel (5) to be processed. The limiting assembly (2) contains an adjusting component, a locking component (25) and a limiting roller (26). The adjusting component is used to adjust the distance between the limiting rollers (26) to adapt to the drive wheels (5) of different widths. The locking component (25) is used to limit the position of the limiting rollers (26) after rotation to adapt to the drive wheels (5) of different lengths.

2. The machining structure for a drive wheel of engineering machinery according to claim 1, characterized in that: The adjusting component includes a column (21), the column (21) is symmetrically installed on the worktable (1), the connecting rod (22) is symmetrically installed between the two columns (21), the threaded rod (24) is rotatably connected between the two columns (21), the moving plate (23) is symmetrically slidably connected to the two connecting rods (22), the threaded rod (24) is threadedly connected to the moving plate (23), the convex plate (231) is symmetrically installed on the moving plate (23), and the convex plate (231) is rotatably connected to the limit roller (26) by means of a locking component (25).

3. The machining structure for a drive wheel of engineering machinery according to claim 2, characterized in that: The threaded rod (24) is symmetrically provided with opposite threads, and the two movable plates (23) are respectively located at the opposite threads of the threaded rod (24).

4. The machining structure for a drive wheel of engineering machinery according to claim 3, characterized in that: The locking member (25) includes a shaft (251), the shaft (251) is rotatably connected to the protruding plate (231), a ratchet gear (252) is installed at one end of the shaft (251), the protruding plate (231) is rotatably connected to a connecting plate (262) via the shaft (251), the connecting plate (262) is connected to the limiting roller (26) via bolts (261), a limiting block (253) is installed on the protruding plate (231), a guide rod (254) is slidably connected to the limiting block (253), a pawl (256) is installed at one end of the guide rod (254) away from the limiting block (253), and a spring (255) is sleeved on the guide rod (254) with its two ends connected to the pawl (256) and the limiting block (253) respectively.

5. The machining structure for a drive wheel of engineering machinery according to claim 4, characterized in that: The transmission assembly (3) includes a mounting base (31). Four mounting bases (31) are installed on the worktable (1), which are arranged in pairs and symmetrically. A guide roller (32) is rotatably connected between two mounting bases (31). A motor (35) is mounted on the worktable (1). The motor (35) drives the two guide rollers (32) to rotate by means of a timing pulley (33) and a timing belt (34).

6. The machining structure for a drive wheel of engineering machinery according to claim 5, characterized in that: The grinding assembly (4) is provided with an assembly plate (41), and a number of guide wheels (42) are rotatably connected on the assembly plate (41). The guide wheels (42) are driven to rotate by a driving component (46) on the other side of the assembly plate (41). An arc-shaped mounting ring (43) is slidably connected between the guide wheels (42), and a grinding component is installed on the arc-shaped mounting ring (43).

7. The machining structure for a drive wheel of engineering machinery according to claim 6, characterized in that: The drive unit (46) includes a third motor (461), a second synchronous pulley (462), and a second synchronous belt (463). The third motor (461) is installed on the other side of the mounting plate (41). The second synchronous pulley (462) is installed on the rotation shaft of the two guide wheels (42). The third motor (461) drives the two guide wheels (42) to rotate by means of the second synchronous pulley (462) and the second synchronous belt (463).

8. The machining structure for a drive wheel of engineering machinery according to claim 7, characterized in that: The grinding component includes a second motor (45) and a grinding wheel (44). The second motor (45) is mounted on the arc-shaped mounting ring (43). The output shaft of the second motor (45) drives the grinding wheel (44) to rotate via a coupling.

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