Shaft part inner hole finishing device

Abstract

This invention relates to the technical field of machining equipment, and in particular to a device for precision machining of the inner hole of shaft parts, which improves the machining efficiency and increases the ease of operation. It includes a mounting base, a support shaft rotatably mounted on the mounting base, a mounting plate coaxially mounted on the support shaft, the mounting plate being rotatably connected to the mounting base, multiple sets of mounting holes at equal angles on the mounting plate, a mounting shaft rotatably mounted at the mounting holes on the mounting plate, a positioning chuck coaxially mounted on the mounting shaft, the positioning chuck being rotatably connected to the mounting plate, a movable frame slidably mounted on the movable frame, an adjusting seat slidably mounted on the adjusting seat, a fixed shaft rotatably mounted on the adjusting seat, a precision machining wheel coaxially mounted on the fixed shaft, a bolt rotatably mounted at the threaded hole of the adjusting seat, a drive mechanism mounted on the mounting base, the drive mechanism being connected to a set of mounting shafts and the fixed shaft, and a power mechanism mounted on the mounting base, the power mechanism being connected to the support shaft.

Description

Technical Field

[0001] This invention relates to the technical field of machining equipment, and in particular to a device for precision machining of the inner hole of shaft parts. Background Technology

[0002] Shafts are one of the most common types of hardware components. They are mainly used to support transmission parts, transmit torque, and bear loads. According to their structural form, shafts can generally be divided into three categories: plain shafts, stepped shafts, and irregular shafts; or into solid shafts, hollow shafts, etc.

[0003] Existing equipment for drilling internal holes in shaft parts generally involves positioning and clamping the shaft parts, followed by machining using a finishing wheel. However, it cannot change shaft parts during operation, and changing them requires stopping the machine and waiting, causing interference between processes and affecting processing efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a device for precision machining of the inner hole of shaft parts, thereby effectively solving the problems pointed out in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A device for precision machining of the inner hole of a shaft-type part includes a mounting base, a support shaft rotatably mounted on the mounting base, a mounting plate coaxially mounted on the support shaft, the mounting plate being rotatably connected to the mounting base, multiple sets of mounting holes equally spaced on the mounting plate, a mounting shaft rotatably mounted at the mounting holes of the mounting plate, a positioning chuck coaxially mounted on the mounting shaft, the positioning chuck being rotatably connected to the mounting plate, a movable frame slidably mounted on the movable frame, an adjusting seat slidably mounted on the adjusting seat, a fixed shaft rotatably mounted on the adjusting seat, a precision machining wheel coaxially mounted on the fixed shaft, a bolt rotatably mounted at the threaded hole of the adjusting seat, the bolt being connected to the movable frame, a drive mechanism mounted on the mounting base, the drive mechanism being connected to a set of mounting shafts and the fixed shaft, and a power mechanism mounted on the mounting base, the power mechanism being connected to the support shaft.

[0007] Furthermore, the power mechanism includes a movable seat, which is slidably mounted on a mounting base. A drive shaft is rotatably mounted on the movable seat. The mounting shaft has a polygonal hole, and the drive shaft is slidably connected to the polygonal hole of the mounting shaft. A hollow shaft is rotatably mounted on the movable seat. A transmission shaft is rotatably mounted on the movable frame. The hollow shaft has a polygonal shaft hole, and the transmission shaft is slidably connected to the polygonal shaft hole of the hollow shaft. A control mechanism is mounted on the movable seat, and the control mechanism is connected to both the drive shaft and the hollow shaft. A transmission mechanism is mounted on the movable frame, and the transmission mechanism is connected to both the fixed shaft and the transmission shaft. A conduction mechanism is mounted on the mounting base, and the conduction mechanism is connected to both the movable frame and the movable seat.

[0008] Furthermore, the transmission mechanism includes a support frame, with two sets of support frames symmetrically mounted on the mounting bases at both ends of the movable seat. A transmission gear is rotatably mounted on the support frame, and two sets of first spur racks are symmetrically arranged in the inner groove of the movable frame. Two sets of second spur racks are symmetrically arranged at both ends of the movable seat. The first and second spur racks are respectively meshed with the transmission gears for transmission connection.

[0009] Furthermore, the transmission mechanism includes a fixed base, which is mounted on a movable frame. A connecting shaft is rotatably mounted on the fixed base. A first bevel gear is coaxially mounted on the connecting shaft. A second bevel gear is coaxially mounted on the transmission shaft. The first bevel gear and the second bevel gear mesh and transmit power to each other. A connecting mechanism is provided on the adjusting base. The connecting mechanism is respectively connected to the fixed shaft and the connecting shaft.

[0010] Furthermore, the connecting mechanism includes a connecting seat, which is mounted on an adjusting seat. A transmission shaft is rotatably mounted on the connecting seat. The connecting shaft has a polygonal through hole. The transmission shaft and the polygonal through hole of the connecting shaft are slidably connected. A third bevel gear is coaxially mounted on the transmission shaft. A fourth bevel gear is coaxially mounted on the fixed shaft. The fourth bevel gear and the third bevel gear are meshed and connected for transmission.

[0011] Furthermore, two sets of cylinders are installed inside the cavity of the mounting base, and the output ends of the two sets of cylinders are respectively connected to the moving frame.

[0012] Furthermore, the control mechanism includes a power motor, which is mounted on a movable base. A power shaft is coaxially arranged at the output end of the power motor. The power shaft is rotatably connected to the movable base. A first sprocket is coaxially arranged on the power shaft. Second sprockets are coaxially arranged on the drive shaft and the hollow shaft, respectively. The same set of chains are meshed on the first sprocket and the two sets of second sprockets.

[0013] Furthermore, the power mechanism includes a servo motor, which is installed inside the cavity of the mounting base. A worm gear is coaxially mounted on the output end of the servo motor, and a worm wheel is coaxially mounted on the support shaft. The worm wheel and the worm gear are meshed and connected for transmission.

[0014] Furthermore, the movable frame is equipped with a connector, on which two sets of threaded rods are rotatably mounted, and the adjusting seat is equipped with two sets of threaded through holes. The threaded rods are connected to the threaded through holes of the adjusting seat, and the threaded rods are equipped with adjusting wheels.

[0015] Furthermore, a touch switch is installed inside the cavity of the mounting base. The touch switch is electrically connected to the servo motor, and the moving base is in contact with the touch switch.

[0016] The beneficial effects of the present invention after adopting the above technical solution are as follows: the mounting plate is rotated and supported on the mounting base by the support shaft; the positioning chuck is rotated and supported on the mounting plate by the mounting shaft; the mounting plate's mounting holes are set at equal angles so that the positioning chuck on the mounting shaft remains in a fixed position after rotation adjustment; the positioning chuck positions and clamps the shaft parts; the adjusting seat is slidably supported on the mounting base by the moving frame; the fixed shaft is rotated and mounted on the moving frame by the adjusting seat; the finishing wheel is easily fixed and installed by the fixed shaft; the connection position between the adjusting seat and the moving frame is locked by bolts; and the finishing wheel is moved by the adjusting seat to adjust the position of the fixed shaft within the shaft. The device adapts to different sizes of internal holes during machining. The working height of the finishing wheel can be adjusted by sliding the movable frame and the mounting base, facilitating insertion into the holes of shaft parts for machining. A power mechanism drives the support shaft to adjust the position of multiple sets of mounting shafts on the mounting plate. A drive mechanism provides rotational power to the mounting shafts and the finishing wheel. As the finishing wheel rotates, the mounting shafts simultaneously drive the shaft parts on the positioning chuck to rotate, increasing the machining position and efficiency of the internal holes. By setting multiple sets of mounting shafts, while the internal holes of shaft parts in the machining area are being machined, shaft parts in other positions can be simultaneously replaced and disassembled on the positioning chuck, improving the processing efficiency of the device and increasing operational convenience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the axial structure of the present invention;

[0020] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0021] Figure 4 This is an internal bottom view schematic diagram of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 6 This is an internal isometric schematic diagram of the present invention;

[0024] The attached diagram shows the following markings: 1. Mounting base; 2. Support shaft; 3. Mounting plate; 4. Mounting shaft; 5. Positioning chuck; 6. Adjusting seat; 7. Fixed shaft; 8. Finishing wheel; 9. Bolt; 10. Moving frame; 11. Moving seat; 12. Drive shaft; 13. Hollow shaft; 14. Transmission shaft; 15. Support frame; 16. Transmission gear; 17. First spur rack; 18. Second spur rack; 19. Fixed seat; 20. Connecting shaft; 21. First bevel gear; 22. Second bevel gear; 23. Connecting seat; 24. Transmission shaft; 25. Third bevel gear; 26. Fourth bevel gear; 27. Cylinder; 28. Power motor; 29. ​​Power shaft; 30. First sprocket; 31. Second sprocket; 32. Chain; 33. Servo motor; 34. Worm gear; 35. Worm wheel; 36. Connecting piece; 37. Threaded rod; 38. Adjusting wheel; 39. Touch switch. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] The present invention relates to a device for precision machining of the inner hole of shaft parts. The installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0027] In the present invention, a device for precision machining of the inner hole of a shaft part, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term. At the same time, numerals such as "first," "second," and "third" do not represent a specific quantity or order, but are only used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] like Figures 1 to 6As shown, a device for precision machining of the inner hole of a shaft part includes a mounting base 1, a support shaft 2 rotatably mounted on the mounting base 1, a mounting plate 3 coaxially mounted on the support shaft 2, the mounting plate 3 being rotatably connected to the mounting base 1, multiple sets of mounting holes equally spaced on the mounting plate 3, a mounting shaft 4 rotatably mounted at the mounting holes of the mounting plate 3, a positioning chuck 5 coaxially mounted on the mounting shaft 4, the positioning chuck 5 being rotatably connected to the mounting plate 3, a movable frame 10 slidably mounted on the mounting base 1, an adjusting seat 6 slidably mounted on the movable frame 10, a fixed shaft 7 rotatably mounted on the adjusting seat 6, a precision machining wheel 8 coaxially mounted on the fixed shaft 7, a bolt 9 rotatably mounted at the threaded hole of the adjusting seat 6, the bolt 9 being connected to the movable frame 10, a drive mechanism mounted on the mounting base 1, the drive mechanism being connected to a set of mounting shafts 4 and fixed shafts 7, and a power mechanism mounted on the mounting base 1, the power mechanism being connected to the support shaft 2.

[0029] During use, the mounting plate 3 is rotated and supported on the mounting base 1 by the support shaft 2, and the positioning chuck 5 is rotated and supported on the mounting plate 3 by the mounting shaft 4. The mounting holes of the mounting plate 3 are angled so that the positioning chuck 5 on the mounting shaft 4 rotates and remains in position after adjustment. The positioning chuck 5 positions and clamps the shaft parts. The adjusting seat 6 is slidably supported on the mounting base 1 by the moving frame 10. The fixed shaft 7 is rotated and mounted on the moving frame 10 by the adjusting seat 6. The fixed shaft 7 facilitates the fixed installation of the finishing wheel 8. The bolt 9 locks the connection between the adjusting seat 6 and the moving frame 10. The adjusting seat 6 moves the fixed shaft 7 to adjust the position of the finishing wheel 8. The device is adaptable to different sizes of internal holes during machining. The working height of the finishing wheel 8 can be adjusted by sliding the movable frame 10 to the mounting base 1, making it easy to insert into the hole of the shaft part for machining. The power mechanism drives the support shaft 2 to drive multiple sets of mounting shafts 4 on the mounting plate 3 to adjust their positions. The drive mechanism provides rotational power to the mounting shafts 4 and the finishing wheel 8. As the finishing wheel 8 rotates, the mounting shafts 4 drive the shaft parts on the positioning chuck 5 to rotate, increasing the machining position and efficiency of the internal hole. By setting multiple sets of mounting shafts 4, when the internal hole of the shaft part in the machining area is being machined, the shaft parts in other positions can be replaced and disassembled simultaneously on the positioning chuck 5, improving the machining efficiency of the device and increasing the convenience of operation.

[0030] As a preferred embodiment of the above, the power mechanism includes a movable seat 11, which is slidably mounted on the mounting base 1. A drive shaft 12 is rotatably mounted on the movable seat 11. A multi-faceted hole is provided on the mounting shaft 4. The drive shaft 12 is slidably connected to the multi-faceted hole of the mounting shaft 4. A chamfer is provided at the connection end between the drive shaft 12 and the transmission shaft 14. A hollow shaft 13 is rotatably mounted on the movable seat 11. A transmission shaft 14 is rotatably mounted on the movable frame 10. A multi-faceted shaft hole is provided on the hollow shaft 13. The transmission shaft 14 is slidably connected to the multi-faceted shaft hole of the hollow shaft 13. A control mechanism is provided on the movable seat 11. The control mechanism is connected to the drive shaft 12 and the hollow shaft 13 respectively. A transmission mechanism is provided on the movable frame 10. The transmission mechanism is connected to the fixed shaft 7 and the transmission shaft 14 respectively. A transmission mechanism is provided on the mounting base 1. The transmission mechanism is connected to the movable frame 10 and the movable seat 11 respectively.

[0031] The transmission mechanism includes a fixed base 19, which is mounted on a movable frame 10. A connecting shaft 20 is rotatably mounted on the fixed base 19. A first bevel gear 21 is coaxially mounted on the connecting shaft 20. A second bevel gear 22 is coaxially mounted on the transmission shaft 14. The first bevel gear 21 and the second bevel gear 22 mesh and are connected for transmission. A connecting mechanism is provided on the adjusting base 6. The connecting mechanism is respectively connected to the fixed shaft 7 and the connecting shaft 20.

[0032] The connecting mechanism includes a connecting seat 23, which is mounted on an adjusting seat 6. A transmission shaft 24 is rotatably mounted on the connecting seat 23. A polygonal through hole is provided on the connecting shaft 24. The transmission shaft 24 and the polygonal through hole of the connecting shaft 20 are slidably connected. A third bevel gear 25 is coaxially mounted on the transmission shaft 24. A fourth bevel gear 26 is coaxially mounted on the fixed shaft 7. The fourth bevel gear 26 and the third bevel gear 25 are meshed and connected for transmission.

[0033] The control mechanism includes a power motor 28, which is mounted on a movable base 11. A power shaft 29 is coaxially arranged at the output end of the power motor 28. The power shaft 29 is rotatably connected to the movable base 11. A first sprocket 30 is coaxially arranged on the power shaft 29. Second sprockets 31 are coaxially arranged on the drive shaft 12 and the hollow shaft 13, respectively. The same set of chains 32 are meshed on the first sprocket 30 and the two sets of second sprockets 31.

[0034] During use, the sliding connection between the movable seat 11 and the mounting base 1 facilitates adjustment of the relative connection position between the hollow shaft 13, the drive shaft 12, and the mounting base 1. The multi-faceted hole cooperation between the drive shaft 12 and the mounting shaft 4 allows the drive shaft 12 to synchronously drive the positioning chuck 5 on the mounting shaft 4 to rotate synchronously. The first sprocket 30 is coaxially mounted on the output end of the power motor 28 via the power shaft 29. The chain 32 meshes with the first sprocket 30 and two sets of second sprockets 31, respectively, enabling the power shaft 29 to drive the drive shaft 12 and the hollow shaft 13. The chamfered design at the multi-faceted connection end between the drive shaft 12 and the mounting shaft 4 increases the stability of their connection. The rotation of the power shaft 29 and the movable seat 11, which in turn drives the power motor 28 to rotate the drive shaft 12 and the hollow shaft 13, increases the connection strength. The power motor 28 synchronously provides rotational power to the drive shaft 12 and the hollow shaft 13. The movable seat 11 moves the drive shaft 12, disengaging it from the mounting shaft 4, preventing resistance when the support shaft 2 rotates the mounting plate 3. The transmission shaft 14 connects to the hollow shaft 13... The multi-faceted shaft hole sliding connection ensures that the transmission relationship between the movable frame 10 and the movable seat 11 remains unchanged when the distance between them is adjusted. The connecting shaft 20 is rotatably supported on the movable frame 10 via the fixed seat 19. The engagement of the first bevel gear 21 and the second bevel gear 22 causes the transmission shaft 14 to synchronously drive the connecting shaft 20 to rotate. The connecting seat 23 causes the transmission shaft 24 to rotatably support the adjusting seat 6. The engagement of the transmission shaft 24 with the multi-faceted through hole of the connecting shaft 20 ensures that the first bevel gear 21 and the third bevel gear 25 transmit power when the connection position between the adjusting seat 6 and the movable frame 10 is adjusted. The dynamic relationship remains unchanged. The engagement of the third bevel gear 25 and the fourth bevel gear 26 causes the transmission shaft 24 to drive the fixed shaft 7 to rotate synchronously. The engagement of the first bevel gear 21 and the second bevel gear 22, as well as the engagement of the transmission shaft 24 and the fourth bevel gear 26, causes the fixed shaft 7 and the transmission shaft 14 to be connected in a synchronous reverse transmission. That is, the direction of rotation of the shaft parts on the positioning chuck 5 driven by the mounting shaft 4 is opposite to the direction of rotation of the finishing wheel 8 driven by the fixed shaft 7. The opposite rotation direction of the mounting shaft 4 and the finishing wheel 8 increases the processing efficiency when processing shaft parts.

[0035] As a preferred embodiment of the above, the transmission mechanism includes a support frame 15, two sets of support frames 15 are symmetrically mounted on the mounting base 1 at both ends of the movable seat 11, a transmission gear 16 is rotatably mounted on the support frame 15, two sets of first straight racks 17 are symmetrically arranged in the inner groove of the movable frame 10, and two sets of second straight racks 18 are symmetrically arranged at both ends of the movable seat 11. The first straight racks 17 and the second straight racks 18 are respectively meshed with the transmission gears 16 for transmission connection.

[0036] The cavity of the mounting base 1 is equipped with two sets of cylinders 27, and the output ends of the two sets of cylinders 27 are respectively connected to the movable frame 10.

[0037] During use, the cylinder 27 drives the moving frame 10 to adjust the working height of the finishing wheel 8. The support frame 15 rotates the transmission gear 16 to support the mounting base 1. The transmission gear 16 meshes with the first spur rack 17 and the second spur rack 18 respectively, causing the moving frame 10 and the moving base 11 to move synchronously in opposite directions. The synchronous movement of the drive shaft 12 and the finishing wheel 8 increases the ease of operation of the device, improves the transmission stability of the device, and increases the synchronization of operation.

[0038] As a preferred embodiment of the above, the power mechanism includes a servo motor 33, which is installed inside the cavity of the mounting base 1. A worm gear 34 is coaxially arranged at the output end of the servo motor 33, and a worm wheel 35 is coaxially arranged on the support shaft 2. The worm wheel 35 is meshed with the worm gear 34 for transmission. When the servo motor 33 is started once, the worm gear 34 meshes with the worm wheel 35 and drives the mounting plate 3 to rotate by the support shaft 2. The rotation angle is a set of mounting shaft 4 angle working intervals.

[0039] A touch switch 39 is installed inside the cavity of the mounting base 1. The touch switch 39 is electrically connected to the servo motor 33, and the moving base 11 is in contact with the touch switch 39.

[0040] During use, the servo motor 33 is started by the touch switch 39. The servo motor 33 is connected to the support shaft 2 by the meshing of the worm gear 34 and the worm wheel 35. The servo motor 33 drives the mounting plate 3 to adjust the position of multiple mounting shafts 4. The position adjustment of the mounting shafts 4 allows the machined shaft parts on the positioning chuck 5 to be replaced. At the same time, the replaced shaft parts are rotated to the processing area to wait for the next processing step. The meshing of the worm wheel 35 and the worm gear 34 gives the transmission a one-way self-locking function, providing stability to the device.

[0041] As a preferred embodiment of the above, the movable frame 10 is provided with a connector 36, and two sets of threaded rods 37 are rotatably provided on the connector 36. The adjusting seat 6 is provided with two sets of threaded through holes. The threaded rods 37 are connected to the threaded through holes of the adjusting seat 6. The threaded rods 37 are provided with adjusting wheels 38.

[0042] During use, the two sets of threaded rods 37 are rotated and mounted on the movable frame 10 by the connector 36. The rotation of the threaded rods 37 causes the threaded through hole of the adjusting seat 6 to engage, allowing for fine adjustment of the connection position between the adjusting seat 6 and the movable frame 10. The adjusting wheel 38 reduces the difficulty of rotating the threaded rods 37 and increases the rotation efficiency of the threaded rods 37.

[0043] First, the shaft parts are positioned and installed on the mounting shaft 4 using the positioning chuck 5. The power motor 28 drives the first sprocket 30 to rotate via the power shaft 29. Then, the first sprocket 30 meshes with two sets of second sprockets 31 via the chain 32, synchronously driving the drive shaft 12 and the hollow shaft 13 to rotate. Then, the hollow shaft 13 meshes with the transmission shaft 14 to drive the second bevel gear 22 to rotate. Then, the second bevel gear 22 meshes with the first bevel gear 21 to drive the connecting shaft 20 to rotate. Then, the connecting shaft 20 meshes with the transmission shaft 24 to drive the third bevel gear 25 to rotate. Then, the third bevel gear 25 meshes with the fourth bevel gear 26, driving the finishing wheel 8 to rotate via the fixed shaft 7. Then, the power shaft 29 is started, and the position of the finishing wheel 8 is lowered by the moving frame 10. At the same time, the transmission gear 16 meshes with the first bevel gear 21 and the second bevel gear 22 to rotate. The spur rack 17 and the second spur rack 18 mesh, and the moving seat 11 drives the drive shaft 12 to move up and down. Then, the drive shaft 12 engages with the multi-faceted hole of the mounting shaft 4, and the mounting shaft 4 drives the shaft parts on the positioning chuck 5 to rotate. After that, the position of the finishing wheel 8 descends to the inner hole of the part for finishing. After the finishing is completed, the position of the moving frame 10 is moved by the power shaft 29 to disengage the finishing wheel 8 from the inner cavity of the part. Then, the drive shaft 12 disengages from the multi-faceted hole of the mounting shaft 4. Then, the moving seat 11 continues to descend until it contacts the touch switch 39, and the power shaft 29 stops. At the same time, the touch switch 39 starts the servo motor 33 to drive the worm gear 34 to rotate. Then, the worm gear 34 meshes with the worm wheel 35 to adjust the working position of the mounting shaft 4 on the mounting plate 3.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for precision machining of the inner hole of shaft-type parts, characterized in that, The system includes a mounting base (1), on which a support shaft (2) is rotatably mounted, and on which a mounting disc (3) is coaxially mounted, the mounting disc (3) being rotatably connected to the mounting base (1). The mounting disc (3) has multiple sets of mounting holes at equal angles, and a mounting shaft (4) is rotatably mounted at the mounting holes of the mounting disc (3). A positioning chuck (5) is coaxially mounted on the mounting shaft (4), and the positioning chuck (5) is rotatably connected to the mounting disc (3). A movable frame (10) is slidably mounted on the mounting base (1). An adjusting seat (6) is slidably arranged on the movable frame (10). A fixed shaft (7) is rotatably arranged on the adjusting seat (6). A precision wheel (8) is coaxially mounted on the fixed shaft (7). A bolt (9) is rotatably arranged at the threaded hole of the adjusting seat (6). The bolt (9) is connected to the movable frame (10). A driving mechanism is arranged on the mounting base (1). The driving mechanism is connected to a set of mounting shafts (4) and fixed shafts (7). A power mechanism is arranged on the mounting base (1). The power mechanism is connected to the support shaft (2). The power mechanism includes a movable seat (11), which is slidably mounted on a mounting base (1). A drive shaft (12) is rotatably mounted on the movable seat (11). A multi-faceted hole is provided on the mounting shaft (4), and the drive shaft (12) is slidably connected to the multi-faceted hole of the mounting shaft (4). A hollow shaft (13) is rotatably mounted on the movable seat (11), and a transmission shaft (14) is rotatably mounted on the movable frame (10). A multi-faceted shaft hole is provided on the hollow shaft (13). The drive shaft (14) is slidably connected to the hollow shaft (13) through a multi-faceted shaft hole. The movable seat (11) is provided with a control mechanism, which is connected to the drive shaft (12) and the hollow shaft (13) respectively. The movable frame (10) is provided with a transmission mechanism, which is connected to the fixed shaft (7) and the drive shaft (14) respectively. The mounting base (1) is provided with a transmission mechanism, which is connected to the movable frame (10) and the movable seat (11) respectively. The transmission mechanism includes a support frame (15), two sets of the support frames (15) are symmetrically installed on the mounting bases (1) at both ends of the movable seat (11), a transmission gear (16) is rotatably arranged on the support frame (15), two sets of first spur racks (17) are symmetrically arranged in the inner groove of the movable frame (10), and two sets of second spur racks (18) are symmetrically arranged at both ends of the movable seat (11). The first spur racks (17) and the second spur racks (18) are respectively meshed with the transmission gears (16) for transmission.

2. The device for precision machining of the inner hole of a shaft-type part as described in claim 1, characterized in that, The transmission mechanism includes a fixed seat (19), which is mounted on a movable frame (10). A connecting shaft (20) is rotatably mounted on the fixed seat (19). A first bevel gear (21) is coaxially mounted on the connecting shaft (20), and a second bevel gear (22) is coaxially mounted on the transmission shaft (14). The first bevel gear (21) and the second bevel gear (22) are meshed and connected for transmission. A connecting mechanism is provided on the adjusting seat (6), which is connected to the fixed shaft (7) and the connecting shaft (20) respectively.

3. The device for precision machining of the inner hole of a shaft-type part as described in claim 2, characterized in that, The connecting mechanism includes a connecting seat (23), which is mounted on an adjusting seat (6). A transmission shaft (24) is rotatably mounted on the connecting seat (23). A polygonal through hole is provided on the connecting shaft (20). The transmission shaft (24) and the polygonal through hole of the connecting shaft (20) are slidably connected. A third bevel gear (25) is coaxially mounted on the transmission shaft (24). A fourth bevel gear (26) is coaxially mounted on the fixed shaft (7). The fourth bevel gear (26) and the third bevel gear (25) are meshed and connected for transmission.

4. The device for precision machining of the inner hole of a shaft-type part as described in claim 1, characterized in that, The cavity of the mounting base (1) is provided with two sets of cylinders (27), and the output ends of the two sets of cylinders (27) are respectively connected to the movable frame (10).

5. The device for precision machining of the inner hole of a shaft-type part as described in claim 1, characterized in that, The control mechanism includes a power motor (28), which is mounted on a movable seat (11). The output end of the power motor (28) is coaxially provided with a power shaft (29). The power shaft (29) is rotatably connected to the movable seat (11). A first sprocket (30) is coaxially provided on the power shaft (29). A second sprocket (31) is coaxially provided on the drive shaft (12) and the hollow shaft (13). The first sprocket (30) and the two sets of second sprockets (31) are meshed with the same set of chains (32).

6. The device for precision machining of the inner hole of a shaft-type part as described in claim 1, characterized in that, The power mechanism includes a servo motor (33), which is installed inside the cavity of the mounting base (1). A worm gear (34) is coaxially arranged at the output end of the servo motor (33), and a worm wheel (35) is coaxially arranged on the support shaft (2). The worm wheel (35) is meshed with the worm gear (34) for transmission.

7. The device for precision machining of the inner hole of a shaft-type part as described in claim 1, characterized in that, The movable frame (10) is provided with a connector (36), and two sets of threaded rods (37) are rotatably provided on the connector (36). The adjusting seat (6) is provided with two sets of threaded through holes. The threaded rods (37) are connected to the threaded through holes of the adjusting seat (6). The threaded rods (37) are provided with adjusting wheels (38).

8. The device for precision machining of the inner hole of a shaft part as described in claim 6, characterized in that, A touch switch (39) is provided inside the cavity of the mounting base (1). The touch switch (39) is electrically connected to the servo motor (33), and the moving base (11) is in contact with the touch switch (39).

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