An installation site keyway milling device

Abstract

This utility model relates to an on-site keyway milling device, comprising two fixed devices distributed axially and detachably fixed to the shaft to be processed. Each fixed device is rotatably connected to a vertical adjusting screw extending radially away from the fixed device. A movable block is threadedly connected to each vertical adjusting screw, and a vertical guide rail parallel to the vertical adjusting screw passes through each movable block. The vertical guide rail is fixedly connected to the fixed device. A milling cutter holder is provided between the two movable blocks, and a milling cutter is mounted on the milling cutter holder. A parallel transverse adjusting screw and transverse guide rail also pass through the milling cutter holder. The transverse adjusting screw is threadedly connected to the milling cutter holder, and both ends of the transverse adjusting screw are rotatably connected to the two movable blocks, while both ends of the transverse guide rail are fixedly connected to the two movable blocks. This utility model directly fixes the device to the shaft to be processed using the fixed devices, eliminating the need to disassemble the shaft and enabling keyway repair processing, thus greatly improving the efficiency of shaft maintenance.

Description

Technical Field

[0001] This utility model relates to the field of keyway processing technology, and in particular to keyway processing during shaft maintenance, specifically referring to a keyway milling device for on-site installation. Background Technology

[0002] For shaft-type parts, a common connection method is to use keyways to connect with the bushing via a key to achieve power transmission. Currently, the machining of keyways is completed in the machining workshop using keyway milling equipment (such as milling machines), and the shaft is assembled in the assembly workshop after machining.

[0003] After prolonged use, the keyway may become damaged. Since the equipment for milling keyways is heavy and inconvenient to move, the shaft needs to be disassembled and transported to the machining workshop for keyway repair, which takes a long time.

[0004] For example, after prolonged and frequent use, the keyway of a rolling mill power push arm shaft may experience wear and deformation, leading to keyway failure. This failure causes slippage between the shaft and the power arm connected to it, preventing the shaft from properly driving the power arm. The usual solution is to weld, grind, and then mill the keyway. However, this requires completely disassembling the shaft and transferring it to a milling machine. This shaft is over 3 meters long and passes through multiple bearing seats and the power push arm, making disassembly and installation extremely inconvenient and hindering maintenance efficiency. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing an on-site keyway milling device that enables keyway repair without disassembling the shaft.

[0006] This utility model is achieved through the following technical solution: providing an on-site keyway milling device, comprising two fixed devices distributed axially and detachably fixed to the shaft to be machined; each of the two fixed devices is rotatably connected to a vertical adjusting screw extending radially away from the fixed device; each of the two vertical adjusting screws is threadedly connected to a moving block; each of the two moving blocks is provided with a vertical guide rail parallel to the vertical adjusting screw, and the vertical guide rail is fixedly connected to the fixed device; a milling cutter holder is provided between the two moving blocks, and a milling cutter extending toward the shaft to be machined is mounted on the milling cutter holder, as well as a power device for driving the milling cutter to rotate; The milling cutter holder is also equipped with parallel transverse adjusting screws and transverse guide rails. The transverse adjusting screws are threaded to the milling cutter holder, and the two ends of the transverse adjusting screws are rotatably connected to the two moving blocks respectively. The two ends of the transverse guide rails are fixedly connected to the two moving blocks respectively.

[0007] In use, this solution uses two fixing devices to fix the equipment on the shaft to be machined, with the keyway located between the two fixing devices. The height of the milling cutter is adjusted by rotating the vertical adjusting screw, and the lateral position of the milling cutter is adjusted by rotating the horizontal adjusting screw. The power device drives the milling cutter to rotate, thereby realizing the milling of the keyway.

[0008] As an optimization, the fixing device includes an upper bent plate and a lower bent plate that are oppositely arranged and fixed together by bolts, and an adjusting screw that passes through the lower bent plate and extends toward the shaft to be processed. The adjusting screw is threadedly connected to the lower bent plate, and a clamping block is rotatably connected to the end of the adjusting screw near the shaft to be processed. A clamping space adapted to the shaft to be processed is formed between the clamping block and the upper bent plate. This optimized solution clamps the shaft through the upper bent plate and the clamping block. By rotating the adjusting screw, the position of the clamping block can be adjusted to meet the usage requirements of shafts with different diameters. Moreover, the structure of the upper and lower bent plates facilitates direct installation on the shaft without disassembling it.

[0009] As an optimization, the upper bending plate has a downward-opening first trapezoidal groove on its sidewall facing the shaft to be processed, with both sides of the first trapezoidal groove contacting the shaft to be processed; the top of the clamping block has an upward-opening second trapezoidal groove, with both sides of the second trapezoidal groove contacting the shaft to be processed. This optimized solution, by setting the trapezoidal grooves, achieves four-point contact fixation of the shaft by the upper bending plate and the clamping block, ensuring the reliability of the fixation.

[0010] As an optimization, the lower end of the vertical guide rail is fixedly connected to the upper bending plate, and the lower end of the vertical adjusting screw is rotatably connected to the upper bending plate. This optimized solution installs the vertical guide rail and the vertical adjusting screw onto the upper bending plate, making installation more convenient.

[0011] As an optimization, there are two transverse guide rails, located on the front and rear sides of the transverse adjusting screw, respectively. This optimization scheme, by setting two transverse guide rails, not only improves the guiding effect on the milling cutter holder and ensures its stability, but also increases its load-bearing capacity, better meeting milling requirements.

[0012] As an optimization, two vertical guide rails are installed on the same moving block, with the two vertical guide rails located on the front and rear sides of the vertical adjusting screw, respectively. This optimization scheme improves the overall structural strength and stability of the equipment by setting two vertical guide rails.

[0013] As an optimization, a vertical turning part is fixed at the upper end of the vertical adjusting screw, and the outer wall contour of the vertical turning part is a regular polygon. This optimization scheme, by setting the vertical turning part, facilitates the rotation operation of the vertical adjusting screw, thereby better ensuring the synchronization of the rotation of the two vertical adjusting screws.

[0014] As an optimization, movable blocks extend from both ends of the lateral adjusting screw, and lateral turning portions are fixed at both ends of the lateral adjusting screw. The outer wall contour of the lateral turning portion is a regular polygon. This optimized solution, by setting the lateral turning portion located outside the movable block, facilitates the rotation operation of the lateral adjusting screw during milling, thereby realizing the milling of the keyway.

[0015] The beneficial effects of this utility model are as follows: by fixing the device directly on the shaft to be processed, the keyway can be repaired without disassembling the shaft, which greatly improves the efficiency of shaft maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention; As shown in the figure: 1. Shaft to be processed; 2. Upper bending plate; 3. Lower bending plate; 4. Adjusting screw; 5. Clamping block; 6. Lateral turning part; 7. Moving block; 8. Lateral guide rail; 9. Milling cutter holder; 10. Lateral adjusting screw; 11. Vertical adjusting screw; 12. Vertical guide rail; 13. Vertical turning part; 14. Milling cutter. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0018] like Figure 1 The device shown is a keyway milling machine installed on site, including two fixed devices distributed along the axial direction and detachably fixed to the shaft 1 to be processed. Each of the two fixed devices is rotatably connected to a vertical adjusting screw 11 extending radially away from the fixed device. Each of the two vertical adjusting screws 11 is connected to a moving block 7 by a thread. Each of the two moving blocks 7 is provided with a vertical guide rail 12 parallel to the vertical adjusting screw. The lower end of the vertical guide rail 12 is fixedly connected to the fixed device.

[0019] A milling cutter holder 9 is provided between the two moving blocks. A milling cutter 14 extending towards the shaft 1 to be machined is mounted on the milling cutter holder 9, along with a power device to drive the milling cutter to rotate. The upper end of the milling cutter's shaft extends upwards from the milling cutter holder and is coaxially connected to the power device. In this embodiment, the milling cutter extends vertically. The power device can be a drive motor, or a tool such as a hand drill, electric wrench, or manual crank handle connected to the upper end of the milling cutter shaft. The upper end of the milling cutter shaft has a regular hexagonal cross-section, allowing for direct clamping with a hand drill chuck or insertion of a socket using an electric wrench. It requires no complex structure or wiring, is simple to manufacture, and easy to use. A crank handle can also be used when there is no power supply.

[0020] The milling cutter holder is also equipped with a parallel transverse adjusting screw 10 and a transverse guide rail 8, both of which are parallel to the shaft 1 to be machined. The transverse adjusting screw 10 is threaded to the milling cutter holder 9, and both ends of the transverse adjusting screw 10 are rotatably connected to two moving blocks 7 via bearings. Both ends of the transverse guide rail 8 are fixedly connected to the two moving blocks 7.

[0021] In this embodiment, there are two transverse guide rails, located on the front and rear sides of the transverse adjusting screw, respectively. The axis of the shaft to be processed is in the left-right direction. Figure 1 The two transverse guide rails 8 are arranged in the front-to-back direction.

[0022] Two vertical guide rails are installed on the same moving block, and the two vertical guide rails on the same moving block are located on the front and rear sides of the vertical adjusting screw of the moving block, respectively, so as to better realize the guiding function and increase the overall structural strength of the equipment.

[0023] The upper end of the vertical adjusting screw is fixed with a vertical turning part 13. The outer wall contour of the vertical turning part 13 is a regular polygon. The lower end of the vertical adjusting screw is rotatably connected to the upper bending plate through a bearing. At the same time, the bearing is used to prevent the vertical adjusting screw from being displaced vertically.

[0024] Moving blocks extend from both ends of the lateral adjusting screw, and lateral turning parts 6 are fixed at both ends of the lateral adjusting screw. The outer wall contour of the lateral turning part 6 is a regular polygon.

[0025] The fixing device includes an upper bent plate 2 and a lower bent plate 3 that are oppositely arranged and fixed together by bolts, and an adjusting screw 4 that passes through the lower bent plate and extends toward the shaft to be processed. The adjusting screw 4 is threadedly connected to the lower bent plate 3. A clamping block 5 is rotatably connected to the end of the adjusting screw near the shaft to be processed. The clamping block 5 and the upper bent plate 2 form a clamping space adapted to the shaft to be processed. The lower end of the vertical guide rail is fixed to the upper bent plate, and the lower end of the vertical adjusting screw is rotatably connected to the upper bent plate.

[0026] To improve the fixing effect and meet the on-site machining requirements of shafts with different diameters, such as Figure 2 As shown, in this embodiment, the upper bending plate has a downward-opening first trapezoidal groove on the side wall facing the shaft to be processed, and both sides of the first trapezoidal groove are in contact with the shaft to be processed; the top of the clamping block has an upward-opening second trapezoidal groove, and both sides of the second trapezoidal groove are in contact with the shaft to be processed.

[0027] The method of using the device in this embodiment is as follows: 1. Based on the position of the milled keyway, install the upper and lower bending plates on the shaft to be processed and fix them with bolts. Tighten the adjusting screw 4 so that the clamping block 5 and the upper bending plate 2 clamp and fix the shaft to be processed, thereby fixing the equipment on the shaft to be processed.

[0028] 2. Install the appropriate milling cutter according to the size of the keyway to be milled. After tightening, adjust the milling cutter to the appropriate position by rotating the vertical adjusting screw 11 and the horizontal adjusting screw.

[0029] 3. Connect the power mechanism. You can use a motor mounted on the milling cutter holder to drive the milling cutter to rotate, or you can use a hand drill, electric wrench, etc. to drive the milling cutter to rotate.

[0030] 4. While milling, rotate the transverse adjusting screw to move the milling cutter laterally for feed, thus achieving machining along the entire length of the keyway. Depending on the keyway depth, combined with the vertical feed depth, the keyway milling can be completed in one or more passes.

[0031] The equipment in this embodiment can perform keyway milling on-site without completely disassembling the parts and transferring them to a milling machine. This skips the time-consuming, labor-intensive, and complex disassembly and installation process, greatly improving maintenance efficiency and not affecting on-site production. In addition to milling, drilling can also be performed by replacing the milling cutter with a drill bit.

[0032] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An installation site keyway milling apparatus, characterized by: It includes two fixing devices distributed along the axial direction and detachably fixed to the shaft (1) to be processed. Each of the two fixing devices is rotatably connected to a vertical adjusting screw (11) extending radially away from the fixing device. Each of the two vertical adjusting screws (11) is connected to a moving block (7) by a thread. Each of the two moving blocks (7) is provided with a vertical guide rail (12) parallel to the vertical adjusting screw. The vertical guide rail (12) is fixedly connected to the fixing device. A milling cutter holder (9) is provided between the two moving blocks. A milling cutter (14) extending toward the shaft to be processed (1) is mounted on the milling cutter holder (9), as well as a power device for driving the milling cutter to rotate. The milling cutter holder is also equipped with a horizontal adjusting screw (10) and a horizontal guide rail (8) that are parallel to each other. The horizontal adjusting screw (10) is connected to the milling cutter holder (9) by a thread. The two ends of the horizontal adjusting screw (10) are rotatably connected to the two moving blocks (7) respectively. The two ends of the horizontal guide rail (8) are fixedly connected to the two moving blocks (7) respectively.

2. The on-site keyway milling equipment according to claim 1, characterized in that: The fixing device includes an upper bent plate (2) and a lower bent plate (3) that are arranged opposite to each other and fixed by bolts, and an adjusting screw (4) that passes through the lower bent plate and extends toward the shaft to be processed. The adjusting screw (4) is threadedly connected to the lower bent plate (3). A clamping block (5) is rotatably connected to one end of the adjusting screw near the shaft to be processed. A clamping space adapted to the shaft to be processed (1) is formed between the clamping block (5) and the upper bent plate (2).

3. The on-site keyway milling equipment according to claim 2, characterized in that: The upper bending plate has a downward-opening first trapezoidal groove on the side wall facing the shaft to be processed, and both sides of the first trapezoidal groove are in contact with the shaft to be processed; the top of the clamping block has an upward-opening second trapezoidal groove, and both sides of the second trapezoidal groove are in contact with the shaft to be processed.

4. The on-site keyway milling equipment according to claim 2, characterized in that: The lower end of the vertical guide rail is fixedly connected to the upper bending plate, and the lower end of the vertical adjusting screw is rotatably connected to the upper bending plate.

5. The on-site keyway milling equipment according to claim 1, characterized in that: There are two transverse guide rails, and the two transverse guide rails are located on the front and rear sides of the transverse adjusting screw, respectively.

6. The on-site keyway milling equipment according to claim 1, characterized in that: Two vertical guide rails are installed on the same moving block, and the two vertical guide rails are located on the front and rear sides of the vertical adjusting screw, respectively.

7. The on-site keyway milling equipment according to claim 1, characterized in that: The upper end of the vertical adjusting screw is fixed with a vertical turning part (13), and the outer wall contour of the vertical turning part (13) is a regular polygon.

8. The on-site keyway milling equipment according to claim 1, characterized in that: The two ends of the lateral adjusting screw extend into moving blocks, and the two ends of the lateral adjusting screw are fixed with lateral turning parts (6), the outer wall contour of the lateral turning parts (6) is a regular polygon.

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