A milling and turning composite dual-head turret

Abstract

This application relates to a dual-head turning-milling turret, comprising a base, a turret, a first motor, and a drive mechanism. The turret is rotatably connected to the base along its axial direction. The first motor drives the turret to rotate. A milling spindle and a power turret are respectively mounted on two machining mounting surfaces of the turret. The drive mechanism is integrated inside the turret and includes a second motor and a switching mechanism. The second motor is connected to either the milling spindle or the power turret via the switching mechanism to drive the milling spindle to rotate or to drive the power turret to switch tool positions. The switching mechanism is used to switch the transmission between the milling spindle and the power turret. Integrating the milling spindle and the power turret into the turret achieves integrated turning, milling, and drilling. The first motor switches the machining position, and the second motor and switching mechanism selectively drive both, eliminating the need for multiple drive motors. Multiple cutting operations can be completed in a single setup, improving machining efficiency and accuracy, and reducing clamping errors.

Description

Technical Field

[0001] This invention relates to the field of tool turrets, and in particular to a milling and turning combined dual-head tool turret. Background Technology

[0002] Turning and milling are the two most basic processes in metal cutting. The core difference lies in the relationship between the workpiece and the cutting tool: turning involves the workpiece rotating and the cutting tool feeding, and is used for "turning circles", focusing on the efficient machining of rotating parts; milling involves the cutting tool rotating and the workpiece or cutting tool feeding, and is used for "milling flat surfaces or grooves". Milling is good at machining complex surfaces of non-rotating parts. The two are often used together to complete all the cutting operations of a complex part.

[0003] Because existing turrets do not have enough internal space to install multiple drive motors, most of them only have turning functions and cannot complete all machining processes such as turning, milling and drilling in one clamping. Summary of the Invention

[0004] To facilitate the machining of precision parts in a single setup, this application provides a turning-milling composite dual-head turret.

[0005] The technical solution provided in this application for a milling and turning composite dual-head turret is as follows:

[0006] A milling and turning composite dual-head turret includes a base, a turret, a first motor, and a drive mechanism. The turret is rotatably connected to the base along its axial direction. The first motor is fixedly installed inside the base, and its output shaft is fixedly connected to the turret. The turret has two symmetrically distributed machining mounting surfaces on its circumferential side, on which a milling spindle and a power turret are respectively mounted. The drive mechanism is integrated inside the turret and includes a second motor and a switching mechanism. The second motor has two synchronously rotating output shafts, which are respectively connected to the milling spindle or the power turret through the switching mechanism to drive the milling spindle to rotate or drive the power turret to complete tool position switching. The switching mechanism is used to switch the transmission between the milling spindle and the power turret.

[0007] By adopting the above technical solution, the milling spindle and the power turret are integrated into the tower, realizing the integration of turning, milling and drilling. With the first motor switching the machining position and the second motor and switching mechanism selectively driving the two, multiple drive motors are not required. Multiple cutting processes can be completed in one clamping, improving machining efficiency and accuracy and reducing clamping errors.

[0008] Preferably, the switching mechanism includes an electric cylinder, a sliding frame, and two clutches. The clutches adopt a friction clutch structure, including a driving part, a driven part, and a clamping device. The driven part is coaxially and fixedly connected to the power turret. The driving part is equipped with a release shaft. One end of the release shaft is coaxially and slidably connected to the driving part through a spline engagement, and the other end is sleeved on the corresponding output shaft of the second motor and is also coaxially and slidably connected to the output shaft through a spline engagement. The clamping device connects the driving part and the driven part, and under normal conditions, the driving part drives the driven part to rotate synchronously through friction.

[0009] The electric cylinder is fixedly installed inside the tower, and the sliding frame is fixedly connected to the output shaft of the electric cylinder. The two ends of the sliding frame are respectively provided with through holes, and the two output shafts of the second motor are respectively inserted into the two through holes. The two ends of the sliding frame are respectively used to abut against the two separation shafts. When the sliding frame moves towards the clutch side under the drive of the electric cylinder, it can push the corresponding separation shaft to act on the clamping device and make it ineffective. When the clamping device is in an ineffective state, the active part and the driven part separate.

[0010] By adopting the above technical solutions, the friction clutch achieves smooth power transmission and overload protection. The release shaft, through spline connection, takes into account both power transmission and sliding functions. The electric cylinder-driven sliding frame can precisely control the clutch disengagement and engagement, quickly complete transmission switching, avoid interference, and has a compact structure and stable operation.

[0011] Preferably, it also includes a starting positioning block and a follower block. The starting positioning block is fixedly installed on the tower, and the follower block is fixedly installed on the power turret. A proximity switch is installed on the starting positioning block. The proximity switch is electrically connected to the equipment control system and is used to provide feedback on whether the power turret has returned to the starting position. When the follower block rotates to abut against the proximity switch, the follower block also abuts against the starting positioning block. The proximity switch is triggered and sends a position signal to the control system.

[0012] By adopting the above technical solution, since the rotation angle of the power turret becomes uncertain after the clutch switches, the starting positioning block and the follower block can realize the mechanical limit of the power turret. The proximity switch feeds back the reset signal to the control system to ensure that the power turret can be accurately reset to the starting position so as to readjust the tool position and avoid the angle deviation from affecting the machining accuracy.

[0013] Preferably, it also includes a resetter, which is used to drive the power turret to rotate a certain angle toward the starting position when the milling spindle rotates.

[0014] By adopting the above technical solution, the resetter can drive the power turret to pre-reset when the milling spindle is working, avoiding its random deviation, shortening the tool position switching time, improving machining efficiency and accuracy, and ensuring machining continuity.

[0015] Preferably, the resetter includes a driven ring, a driving ring, a connecting frame, a bearing, and a clamping element, defining the separation shaft near the power turret as the first shaft; the inner ring of the bearing is tightly fitted and fixed to the first shaft, and the outer ring of the bearing is fixedly connected to the connecting frame, allowing the connecting frame to rotate around the first shaft via the bearing; the driving ring is fixedly mounted on the connecting frame and moves synchronously with the connecting frame; the driven ring is coaxially fixedly mounted on the driving part of the corresponding clutch and rotates synchronously with the driving part, with the driving ring and driven ring coaxially facing each other;

[0016] The clamping member is installed on the first shaft. When the speed of the output shaft of the second motor is lower than the rated speed, the clamping member starts and clamps the outer ring of the bearing, causing the outer ring of the bearing to rotate synchronously with the first shaft. When the corresponding clamping device is in normal working condition, there is a gap between the driving ring and the driven ring. When the corresponding clamping device is in failure condition, the driving ring rotates with the first shaft and abuts against the driven ring, driving the driven ring to rotate synchronously through friction.

[0017] By adopting the above technical solution, the working process of the resetter is synchronized with the clutch switching state and the working state of the milling spindle. The specific process is as follows: When the milling spindle is working, the milling spindle is set to a slow speed during the workpiece shifting stage and a fast speed during the workpiece machining stage. At this time, the switching mechanism will control the clutch on the corresponding power turret side to disengage, the power turret loses power drive, and the spring of the clamping element pushes the clamping block to clamp the outer ring of the bearing, causing the connecting frame and the driving ring to rotate with the first shaft. Through friction, the driven ring and the power turret are driven to pre-reset to the starting position. After entering the machining stage, the speed of the milling spindle increases, and the centrifugal force drives the clamping block to overcome the clamping force. The outer ring of the bearing no longer rotates with the first shaft through the clamping element, and the power turret no longer performs reset rotation. If the power turret has completed reset before the slow speed is switched to the fast speed, then the static friction between the driving ring and the driven ring will change to dynamic friction.

[0018] Preferably, the clamping component includes a fixed ring, several springs, and several clamping blocks. The fixed ring is coaxially sleeved and fixed on the first shaft. The several clamping blocks are slidably connected inside the fixed ring along the radial direction of the fixed ring. The several springs are arranged in a one-to-one correspondence with the several clamping blocks. One end of each spring abuts against the fixed ring, and the other end abuts against the corresponding clamping block, which is used to provide radial clamping force to the clamping block, drive the clamping block to move toward the outer ring of the bearing and tightly clamp the outer ring of the bearing.

[0019] By adopting the above technical solution, the clamping component uses a spring to provide radial clamping force, which drives the clamping block to clamp the outer ring of the bearing, realizing power linkage. The structure is simple and can avoid rotational interference, ensuring stable reset function.

[0020] The main technical effects of this invention are reflected in the following aspects:

[0021] 1. This invention integrates the milling spindle and the power turret on the tower, realizing the integration of turning, milling and drilling. With the first motor switching the machining position and the second motor and switching mechanism selectively driving the two to work, multiple drive motors are not required. Multiple cutting processes can be completed in one clamping, improving machining efficiency and accuracy and reducing clamping errors.

[0022] 2. The reset device of the present invention can drive the power turret to pre-reset when the milling spindle is working, so as to avoid its random deviation, shorten the tool position switching time, improve the processing efficiency and accuracy, and ensure the continuity of processing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0025] Figure 3 This is a schematic diagram of the internal structure of the tower in an embodiment of this application.

[0026] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0027] Figure 5 This is a schematic diagram of the resetter and corresponding clutch assembled according to an embodiment of this application.

[0028] Figure 6 This is an assembly diagram of the resetter and the corresponding clutch according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Base; 2. Tower; 21. Milling spindle; 22. Power turret; 23. Cover plate; 3. First motor; 4. Drive mechanism; 41. Second motor; 42. Switching mechanism; 43. Electric cylinder; 44. Sliding frame; 441. Perforation; 45. Clutch; 451. Driving part; 4511. Separating shaft; 4512. First shaft; 452. Driven part; 453. Clamping device; 46. Snap ring; 51. Starting positioning block; 52. Follower block; 53. Proximity switch; 6. Resetter; 61. Driven ring; 62. Driving ring; 63. Connecting frame; 64. Bearing; 641. Inner ring; 642. Outer ring; 65. Fixed ring; 66. Spring; 67. Clamping block; 68. Gear groove. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0031] This application discloses a milling and turning composite dual-head turret.

[0032] Reference Figures 1-3 This embodiment of a milling and turning composite dual-head turret includes a base 1, a turret 2, a first motor 3, and a drive mechanism 4. The turret 2 is rotatably connected to the base 1 along its axial direction. The first motor 3 is fixedly installed inside the base 1, and its output shaft is fixedly connected to the turret 2. The turret 2 has two symmetrically distributed machining mounting surfaces on its circumferential side. The two machining mounting surfaces are respectively mounted with a milling spindle 21 and a power turret 22. The drive mechanism 4 is integrated inside the turret 2 and includes a second motor 41 and a switching mechanism 42. The second motor 41 has two synchronously rotating output shafts and is connected to the milling spindle 21 or the power turret 22 through the switching mechanism 42 to drive the milling spindle 21 to rotate or drive the power turret 22 to complete the tool position switching. The switching mechanism 42 is used to switch the transmission between the milling spindle 21 and the power turret 22.

[0033] Reference Figures 1-3 The milling spindle 21 and the power turret 22 are integrated into the tower 2 to realize the integration of turning, milling and drilling. With the first motor 3 to switch the machining position, and the second motor 41 and the switching mechanism 42 to selectively drive the two, multiple cutting processes can be completed in one clamping without the need for multiple drive motors, thereby improving machining efficiency and accuracy and reducing clamping errors.

[0034] Reference Figures 1-6 The switching mechanism 42 includes an electric cylinder 43, a sliding frame 44, and two clutches 45. The clutches 45 adopt a friction clutch structure, including an active part 451, a driven part 452, and a clamping device 453. The driven part 452 is coaxially and fixedly connected to the power turret 22. The active part 451 is equipped with a release shaft 4511. One end of the release shaft 4511 is coaxially and slidably connected to the active part 451 through a spline fit, and the other end is sleeved on the corresponding output shaft of the second motor 41 and is also coaxially and slidably connected to the output shaft through a spline fit. The clamping device 453 connects the active part 451 and the driven part 452, and under normal conditions, the active part 451 drives the driven part 452 to rotate synchronously through friction.

[0035] Reference Figures 1-6 The electric cylinder 43 is fixedly installed inside the tower 2. The sliding frame 44 is fixedly connected to the output shaft of the electric cylinder 43. The two ends of the sliding frame 44 are respectively provided with through holes 441. The two output shafts of the second motor 41 are respectively inserted into the two through holes 441. The two ends of the sliding frame 44 are respectively used to abut against the two separation shafts 4511. When the sliding frame 44 moves toward the clutch 45 side under the drive of the electric cylinder 43, it can push the corresponding separation shaft 4511 to act on the clamping device 453 and make it fail. When the clamping device 453 is in a failed state, the active part 451 and the driven part 452 are separated.

[0036] Reference Figures 1-6 The friction clutch 45 achieves smooth power transmission and overload protection. The release shaft 4511 combines power transmission and sliding functions through spline connection. The electric cylinder 43 drives the sliding frame 44 to precisely control the disengagement and engagement of the clutch 45, quickly complete the transmission switching, avoid interference, and has a compact structure and stable operation.

[0037] Reference Figures 1-6 The entire device is controlled by a PLC equipment control system. Since the PLC equipment control system is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0038] Reference Figures 1-6 It also includes a starting positioning block 51 and a follower block 52. The starting positioning block 51 is fixedly installed on the tower 2, and the follower block 52 is fixedly installed on the power turret 22. A proximity switch 53 is installed on the starting positioning block 51. The proximity switch 53 is electrically connected to the equipment control system and is used to provide feedback on whether the power turret 22 has returned to the starting position. When the follower block 52 rotates to abut against the proximity switch 53, the follower block 52 also abuts against the starting positioning block 51. The proximity switch 53 is triggered and sends a position signal to the control system.

[0039] Reference Figures 1-6 Since the rotation angle of the power turret 22 becomes uncertain after the clutch 45 is switched, the starting positioning block 51 and the follower block 52 can realize the mechanical limit of the power turret 22. The proximity switch 53 feeds back the reset signal to the control system to ensure that the power turret 22 can be accurately reset to the starting position so as to readjust the tool position and avoid the angle deviation from affecting the machining accuracy.

[0040] Reference Figures 1-6 It also includes a resetter 6, which is used to drive the power turret 22 to rotate a certain angle toward the starting position when the milling spindle 21 rotates.

[0041] Reference Figures 1-6 The resetter 6 can drive the power turret 22 to pre-reset when the milling spindle 21 is working, to prevent it from shifting randomly, shorten the tool position switching time, improve machining efficiency and accuracy, and ensure machining continuity.

[0042] Reference Figures 1-6The resetter 6 includes a driven ring 61, a driving ring 62, a connecting frame 63, a bearing 64, and a clamping element. The separation shaft 4511 near the power turret 22 is defined as the first shaft 4512. The inner ring 641 of the bearing 64 is tightly fitted and fixed on the first shaft 4512, and the outer ring 642 of the bearing 64 is fixedly connected to the connecting frame 63, so that the connecting frame 63 can rotate around the first shaft 4512 through the bearing 64. The driving ring 62 is fixedly installed on the connecting frame 63 and moves synchronously with the connecting frame 63. The driven ring 61 is coaxially fixedly installed on the driving part 451 of the corresponding clutch 45 and rotates synchronously with the driving part 451. The driving ring 62 and the driven ring 61 are coaxially opposite each other.

[0043] Reference Figures 1-6 The clamping element is installed on the first shaft 4512. When the output shaft speed of the second motor 41 is lower than the rated speed, the clamping element starts and clamps the outer ring 642 of the bearing 64, causing the outer ring 642 of the bearing 64 to rotate synchronously with the first shaft 4512. When the corresponding clamping device 453 is in normal working condition, there is a gap between the driving ring 62 and the driven ring 61. When the corresponding clamping device 453 is in failure condition, the driving ring 62 rotates with the first shaft 4512 and presses against the driven ring 61, driving the driven ring 61 to rotate synchronously through friction.

[0044] Reference Figures 1-6 The working process of the resetter 6 is synchronized with the switching state of the clutch 45 and the working state of the milling spindle 21. The specific process is as follows: When the milling spindle 21 is working, the milling spindle 21 is set to a slow speed during the workpiece shifting stage and a fast speed during the workpiece machining stage; at this time, the switching mechanism 42 will control the clutch 45 on the corresponding side of the power turret 22 to disengage, the power turret 22 loses power drive, and the spring 66 of the clamping member pushes the clamping block 67 to clamp the outer ring 642 of the bearing 64, so that the connecting frame 63 and the active... Ring 62 rotates with the first shaft 4512, and through friction, drives the driven ring 61 and the power turret 22 to pre-reset to the starting position. After entering the machining stage, the milling spindle 21 speed increases, and the centrifugal force drives the clamping block 67 to overcome the clamping force. The outer ring 642 of the bearing 64 no longer rotates with the first shaft 4512 through the clamping parts, and the power turret 22 no longer performs reset rotation. If the power turret 22 has completed reset before the slow speed is switched to the fast speed, then the static friction between the driving ring 62 and the driven ring 61 will change to dynamic friction.

[0045] Reference Figures 1-6The clamping component includes a fixed ring 65, several springs 66, and several clamping blocks 67. The fixed ring 65 is coaxially sleeved and fixed on the first shaft 4512. The clamping blocks 67 are slidably connected inside the fixed ring 65 along the radial direction of the fixed ring 65. The several springs 66 are arranged one-to-one with the clamping blocks 67. One end of the spring 66 abuts against the fixed ring 65 and the other end abuts against the corresponding clamping block 67, which is used to provide radial clamping force to the clamping block 67, drive the clamping block 67 to move toward the outer ring 642 of the bearing 64 and tightly clamp the outer ring 642 of the bearing 64.

[0046] Reference Figures 1-6 The clamping component uses spring 66 to provide radial clamping force, which drives the clamping block 67 to clamp the outer ring 642 of the bearing 64, realizing power linkage. The structure is simple and can avoid rotational interference, ensuring stable reset function.

[0047] Reference Figures 1-6 To improve the connection strength between the clamping block 67 and the outer ring 642 of the bearing 64, the clamping block 67 and the outer ring 642 of the bearing 64 have meshing grooves 68 in the circumferential direction. At the same time, the retaining ring 65 also has a sliding groove that mates with the clamping block 67, as well as a dedicated mounting groove for the spring 66. These are all standard features and will not be described in detail here.

[0048] Reference Figures 1-6 Both the first motor 3 and the second motor 41 are preferably servo motors. Since the installation space of the second motor 41 inside the tower 2 is very limited, the second motor 41 adopts a smaller, two-headed synchronous rotating double-headed motor.

[0049] Reference Figures 1-6 The clutch 45 has a structure similar to a friction clutch 45 used in automobiles. The driving part 451 corresponds to the pressure plate assembly, the driven part 452 corresponds to the flywheel, friction plates, and clutch 45 cover assembly, and the clamping device 453 corresponds to the diaphragm spring 66. Through the pressure of the diaphragm spring 66, it adheres to the pressure plate, and the power of the driving part 451 is transmitted to the flywheel and clutch 45 cover assembly by friction. When the release shaft 4511 acts on the diaphragm spring 66, causing the diaphragm spring 66 to deform, the diaphragm spring 66 fails, and the friction plates separate from the driving part 451 along with the driven part 452, interrupting the power transmission. Its specific structure is mature existing technology and will not be described in detail here.

[0050] Reference Figure 5 and Figure 6 In order to limit the position of bearing 64, a snap ring 46 can be installed on the first shaft 4512 to limit the position of the inner ring 641 of bearing 64 on the first shaft 4512.

[0051] Reference Figure 2To facilitate the installation of the internal components of the tower 2, a cover plate 23 is detachably fixed to the end of the tower 2 away from the base 1 by screws.

[0052] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A milling and turning composite dual-head turret, characterized in that: The device includes a base (1), a tower (2), a first motor (3), and a drive mechanism (4). The tower (2) is rotatably connected to the base (1) along its axial direction. The first motor (3) is fixedly installed inside the base (1), and its output shaft is fixedly connected to the tower (2). The tower (2) has two symmetrically distributed machining mounting surfaces on its circumferential side. The two machining mounting surfaces are respectively equipped with a milling spindle (21) and a power turret (22). The drive mechanism (4) is integrated inside the tower (2) and includes a second motor (41) and a switching mechanism (42). The second motor (41) has two synchronously rotating output shafts and is connected to the milling spindle (21) or the power turret (22) through the switching mechanism (42) to drive the milling spindle (21) to rotate or drive the power turret (22) to complete the tool position switching. The switching mechanism (42) is used to switch the transmission of the milling spindle (21) and the power turret (22). The switching mechanism (42) includes an electric cylinder (43), a sliding frame (44), and two clutches (45). The clutches (45) adopt a friction clutch structure, including an active part (451), a driven part (452), and a clamping device (453). The driven part (452) is coaxially fixedly connected to the power turret (22). The active part (451) is equipped with a separation shaft (4511). One end of the separation shaft (4511) is coaxially slidably connected to the active part (451) through a spline fit, and the other end is sleeved on the corresponding output shaft of the second motor (41) and is also coaxially slidably connected to the output shaft through a spline fit. The clamping device (453) connects the active part (451) and the driven part (452). Under normal conditions, the active part (451) drives the driven part (452) to rotate synchronously through friction. The electric cylinder (43) is fixedly installed inside the tower (2). The sliding frame (44) is fixedly connected to the output shaft of the electric cylinder (43). The two ends of the sliding frame (44) are respectively provided with through holes (441). The two output shafts of the second motor (41) are respectively inserted into the two through holes (441). The two ends of the sliding frame (44) are respectively used to abut against the two separation shafts (4511). When the sliding frame (44) moves toward the clutch (45) under the drive of the electric cylinder (43), it can push the corresponding separation shaft (4511) to act on the clamping device (453) and make it fail. When the clamping device (453) is in a failed state, the active part (451) and the driven part (452) separate.

2. The milling-turning composite dual-head turret according to claim 1, characterized in that: It also includes a starting positioning block (51) and a follower block (52). The starting positioning block (51) is fixedly installed on the tower (2), and the follower block (52) is fixedly installed on the power turret (22). A proximity switch (53) is installed on the starting positioning block (51). The proximity switch (53) is electrically connected to the equipment control system and is used to provide feedback on whether the power turret (22) has returned to the starting position. When the follower block (52) rotates to abut against the proximity switch (53), the follower block (52) also abuts against the starting positioning block (51). The proximity switch (53) is triggered and sends a position signal to the control system.

3. A turning-milling composite dual-head turret according to claim 2, characterized in that: It also includes a resetter (6), which is used to drive the power turret (22) to rotate a certain angle toward the starting position when the milling spindle (21) rotates.

4. A milling-turning composite dual-head turret according to claim 3, characterized in that: The resetter (6) includes a driven ring (61), a driving ring (62), a connecting frame (63), a bearing (64), and a clamping element. The separation shaft (4511) near the power turret (22) is defined as the first shaft (4512). The inner ring (641) of the bearing (64) is tightly fitted and fixed on the first shaft (4512), and the outer ring (642) of the bearing (64) is fixedly connected to the connecting frame (63), so that the connecting frame (63) can rotate around the first shaft (4512) through the bearing (64). The driving ring (62) is fixedly installed on the connecting frame (63) and moves synchronously with the connecting frame (63). The driven ring (61) is coaxially fixedly installed on the driving part (451) of the corresponding clutch (45) and rotates synchronously with the driving part (451). The driving ring (62) and the driven ring (61) are coaxially opposite each other. The clamping member is installed on the first shaft (4512). When the speed of the output shaft of the second motor (41) is lower than the rated speed, the clamping member starts and clamps the outer ring (642) of the bearing (64), causing the outer ring (642) of the bearing (64) to rotate synchronously with the first shaft (4512). When the corresponding clamping device (453) is in normal working condition, there is a gap between the driving ring (62) and the driven ring (61). When the corresponding clamping device (453) is in failure condition, the driving ring (62) rotates with the first shaft (4512) and abuts against the driven ring (61), driving the driven ring (61) to rotate synchronously through friction.

5. A turning-milling composite dual-head turret according to claim 4, characterized in that: The clamping component includes a fixed ring (65), several springs (66) and several clamping blocks (67). The fixed ring (65) is coaxially sleeved and fixed on the first shaft (4512). The several clamping blocks (67) are slidably connected inside the fixed ring (65) along the radial direction of the fixed ring (65). The several springs (66) are arranged in a one-to-one correspondence with the several clamping blocks (67). One end of the spring (66) abuts against the fixed ring (65) and the other end abuts against the corresponding clamping block (67), which is used to provide radial clamping force to the clamping block (67) and drive the clamping block (67) to move toward the outer ring (642) of the bearing (64) and tightly clamp the outer ring (642) of the bearing (64).

Images