A rotor shaft stable clamping and rotating device for motor processing

Abstract

The present invention discloses a rotor shaft stable clamping and rotating device for motor processing, which relates to the technical field of shaft positioning. The rotor shaft is placed in the spiral diameter of the expansion and contraction spring, and the adjusting ring outside the rotating positioning sleeve utilizes the cooperation of parts such as a linkage rod, a limit block and a two-way sliding rod to achieve the stretching of one end of the expansion and contraction spring. As the expansion and contraction spring is gradually stretched, its spiral inner diameter will also gradually decrease, thereby gradually achieving inward retraction and adaptively positioning the rotor shaft in the center. The expansion and contraction spring in a spiral posture will form a relatively closed and evenly distributed wrapping binding force on the outside of the rotor shaft after being tightened. Compared with the existing arc-shaped splint clamping mechanism, it has the advantages of high adaptability and easy adjustment. At the same time, compared with the existing clamping mechanism that can adapt to different shaft diameters, it has the advantages of evenly distributed clamping force and comprehensive stability, thereby achieving the effect of integrating the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft positioning, in particular to a rotor shaft stabilizing clamping and rotating device for motor processing. Background Art

[0002] The motor rotor shaft is a key component inside the electric motor. It is the support and transmission part of the rotor. It is usually a long shaft made of metal material and can rotate freely during the operation of the motor. The rotor shaft processing process generally involves a series of steps such as material selection (medium carbon steel, alloy steel), rough turning, fine turning and milling (opening keyways or other special shapes as needed). The machine tool process involves clamping and positioning the rotor shaft. In the rough turning and fine turning processes, not only clamping is required, but also the shaft body needs to be driven to rotate to facilitate surface grinding and other surface treatments or shape treatments of the rotor shaft.

[0003] For example, the Chinese patent with publication number CN119458194A proposes a motor rotor shaft stable clamping and rotating device. When the slide moves, the motor rotor shaft stable clamping and rotating device will also drive the arc clamping rod to move. Under the action of the auxiliary gear, the moving rod is driven to make the retaining ring contact with the push plate 2, thereby pushing the extension plate and the push rod to move, and then driving the arc clamping plate 2 to move to achieve the clamping effect.

[0004] The arc-shaped splint has a relatively complete wrapping property for clamping cylindrical workpieces and can provide closed-loop clamping force. It is suitable for stable clamping of shafts with high precision requirements (such as motor rotor shafts) and has a pinch-proof effect. However, the arc cannot be adjusted. When clamping rotor shafts of different sizes, splints with different arcs are required. In particular, when the rotor shaft is rough-machined, there is generally a diameter allowance left. After subsequent surface grinding and other fine machining, the allowance will be removed to reach the standard size. The diameter will change before and after rough turning and fine turning, and splints with the same arc cannot adapt.

[0005] There is no shortage of clamping mechanisms in the existing technology that can adapt to different shaft diameters. Clamping of shafts of different sizes is achieved by synchronously expanding and contracting the chucks distributed at equal angles. Compared with the arc-shaped splint, it has the advantage of high adaptability. However, its disadvantage is also obvious. That is, it cannot form a closed-loop clamping force on the outside of the shaft like the arc-shaped splint. It is necessary to apply a large pressure on the shaft wall in the form of point contact to clamp. The clamping force is difficult to control. If it is too large, it is easy to damage the shaft wall. If it is too small, it is easy to cause the shaft to slide and the power to be separated during rotation.

[0006] It is concluded that it is difficult to integrate the two advantages of closed-loop stable clamping and shaft diameter adaptation in the same clamping mechanism in the existing technology. Therefore, the present invention is innovatively designed based on the original rotor shaft stable clamping rotating equipment for motor processing. Summary of the Invention

[0007] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a rotor shaft stable clamping and rotating device for motor processing, so as to solve the problem raised in the above background technology that it is difficult for the existing technology to integrate the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a device for stably clamping and rotating a rotor shaft for motor machining, comprising a worktable and a base plate fixedly mounted on one end surface of the worktable, a positioning sleeve suspended above the base plate for docking with the rotor shaft, an expansion spring coaxially disposed within the positioning sleeve for surrounding and positioning rotor shafts of different sizes, and a plurality of clamping plates equiangularly distributed between the positioning sleeve and the expansion spring for tightening the expansion spring and assisting in centering the rotor shaft.

[0009] A driving assembly for driving the positioning sleeve to rotate is installed on the upper surface of the base plate;

[0010] A socket centering component which is coaxial with the positioning sleeve and has an adjustable distance from the positioning sleeve is installed on the upper surface of the workbench away from the positioning sleeve.

[0011] Preferably, a vertical plate is fixed to the upper surface of the base plate, and the positioning sleeve is rotatably connected to the vertical plate through a bearing;

[0012] The driving assembly is fixedly mounted on the outer end of the vertical plate.

[0013] Preferably, a one-way slide bar is vertically fixed to one end of the expansion spring away from the socket centering assembly, and a two-way slide bar is vertically fixed to one end of the expansion spring close to the socket centering assembly.

[0014] Preferably, the one-way sliding rod and the two-way sliding rod are both slidably passed through the positioning sleeve, and the outer ends of the one-way sliding rod and the two-way sliding rod are fixed with anti-slip blocks;

[0015] The side wall of one end of the positioning sleeve is provided with an adapter hole for the one-way sliding rod to slide and extend perpendicular to the central axis of the positioning sleeve;

[0016] The side wall of the other end of the positioning sleeve is provided with a limiting groove for allowing the bidirectional sliding rod to simultaneously slide telescopically perpendicular to the central axis of the positioning sleeve and slide horizontally along the central axis of the positioning sleeve.

[0017] Preferably, the outer wall of the positioning sleeve is threadedly mounted with an adjusting collar, and the outer wall of the positioning sleeve is provided with a thread groove matching the thread on the inner wall of the adjusting collar;

[0018] An annular groove is formed at one end of the adjusting collar, and a spherical end of a linkage rod is slidably arranged inside the annular groove;

[0019] The other end of the linkage rod is connected to the limit block, and the end of the bidirectional sliding rod slides through the limit block;

[0020] An annular protrusion structure is fixed on the outer wall of the positioning sleeve, and the linkage rod slides through the annular protrusion structure.

[0021] Preferably, the side wall of the clamping plate is in contact with the outer surface of the expansion spring, and telescopic rods that slide through the side wall of the positioning sleeve are fixed to both ends of the clamping plate.

[0022] Preferably, a return spring is wound around the outer wall of the telescopic rod, one end of the return spring is welded to the outer wall of the positioning sleeve, and the other end of the return spring is fixed to the end of the telescopic rod.

[0023] Preferably, the positioning sleeve is provided with centering rods fixed to the side wall of the splint, distributed at equal angles inside the positioning sleeve near the jack centering assembly;

[0024] The end of the centering rod is hemispherical, and the distance between the two opposite centering rods is the same as the inner diameter of the expansion spring.

[0025] Preferably, the driving assembly includes a driving motor fixedly connected to the vertical plate, and the output shaft of the driving motor passes through the vertical plate through a bearing and is fixedly connected to a gear;

[0026] The driving assembly further comprises a gear ring which is fixedly sleeved on the outside of the annular protruding structure on the outer wall of the positioning sleeve and meshes with the gear.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention adopts the characteristic that the inner diameter of the spiral of the expansion and contraction spring changes when it is extended and contracted, and cleverly combines the clamping and rotating equipment required for the rotor shaft processing, places the rotor shaft in the spiral diameter of the expansion and contraction spring, and rotates the adjusting collar outside the positioning sleeve to achieve the stretching of one end of the expansion and contraction spring by the cooperation of parts such as the linkage rod, the limit block and the two-way sliding rod. As the expansion and contraction spring gradually stretches, the inner diameter of the spiral will gradually decrease, thereby gradually achieving inward retraction and adaptively positioning the rotor shaft in the center. After being tightened, the expansion and contraction spring in the spiral posture will form a relatively closed and evenly distributed wrapping restraint force on the outside of the rotor shaft. Compared with the existing arc-shaped splint clamping mechanism, it has the advantages of high adaptability and easy adjustment. At the same time, compared with the existing clamping mechanism that can adapt to different shaft diameters, it has the advantages of evenly distributed clamping force and comprehensive stability, thereby achieving the effect of integrating the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism;

[0029] In addition, a splint is arranged around the outside of the expansion and contraction spring to assist the expansion and contraction spring in deformation and compress the expansion and contraction spring to achieve correction of the expansion and contraction spring, so as to prevent irregular expansion and contraction deformation of the expansion and contraction spring and slow down the elastic fatigue of the expansion and contraction spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0032] Figure 3 It is a schematic diagram of the top plan structure of the present invention.

[0033] Figure 4 It is a schematic diagram of the connection structure of the drive assembly, positioning sleeve and riser of the present invention.

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning sleeve of the present invention.

[0035] Figure 6 This is a schematic diagram of the connection structure between the adjusting collar and the bidirectional sliding rod of the present invention.

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the splint of the present invention.

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the expansion and contraction spring of the present invention.

[0038] In the figure: 1. Workbench; 2. Base plate; 21. Vertical plate; 3. Positioning sleeve; 31. Limiting groove; 4. Expansion and contraction spring; 41. One-way slide bar; 42. Two-way slide bar; 5. Adjusting collar; 51. Annular groove; 52. Linking rod; 53. Limiting block; 6. Clamp; 61. Telescopic rod; 62. Return spring; 63. Centering rod; 7. Drive motor; 71. Gear; 72. Gear ring; 8. Socket centering assembly. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 8The present invention provides a technical solution: a rotor shaft stably clamping and rotating device for motor processing, comprising a worktable 1 and a base plate 2 fixedly mounted on one end surface of the worktable 1, a positioning sleeve 3 suspended above the base plate 2 for docking with the rotor shaft, an expansion spring 4 coaxially disposed within the positioning sleeve 3 for surrounding and positioning rotor shafts of different sizes, and a plurality of clamping plates 6 equiangularly distributed between the positioning sleeve 3 and the expansion spring 4 for tightening the expansion spring 4 and assisting in centering the rotor shaft.

[0041] A driving assembly for driving the positioning sleeve 3 to rotate is installed on the upper surface of the base plate 2;

[0042] A socket centering assembly 8 is installed on the upper surface of the workbench 1 away from the positioning sleeve 3 , which is coaxial with the positioning sleeve 3 and has an adjustable distance from the positioning sleeve 3 .

[0043] As this embodiment, the rotor shaft stable clamping rotation device needs to be used in conjunction with a processing machine such as a grinding machine, and is generally not set up separately. Therefore, the present invention is as follows Figures 1 to 3 The diagram shows a rotor shaft stabilizing and rotating device installed on a processing machine tool. It should be noted that based on comprehensive considerations such as assembly requirements, weight reduction, and heat dissipation (in some special motors, such as wound rotor motors, the center through hole can be used to pass cables or pipes to facilitate electrical connection of the motor or coolant circulation), most of the through holes are opened in the center of the rotor shaft. Figure 1 and Figure 2 The illustrated socket centering assembly 8 is used to adapt to the rotor shaft with a central opening. In actual application, a disc can be used to tighten the solid rotor shaft. This is a prior art and will not be described in detail in the present invention.

[0044] like Figure 1 As shown, a baffle is fixed in the end cavity of the positioning sleeve 3 to cooperate with the socket centering assembly 8 to achieve axial tightening of the rotor shaft.

[0045] A vertical plate 21 is fixed to the upper surface of the bottom plate 2, and the positioning sleeve 3 is rotatably connected to the vertical plate 21 through a bearing;

[0046] The driving assembly is fixedly mounted on the outer end of the vertical plate 21 .

[0047] As this embodiment, the vertical plate 21 provides a fixed support force for the driving assembly and simultaneously suspends the positioning sleeve 3 so that the positioning sleeve 3 can stably receive the driving effect of the driving assembly.

[0048] A one-way slide bar 41 is vertically fixed to one end of the expansion spring 4 away from the socket centering assembly 8 , and a two-way slide bar 42 is vertically fixed to one end of the expansion spring 4 close to the socket centering assembly 8 .

[0049] The one-way slide bar 41 and the two-way slide bar 42 are both slidably passed through the positioning sleeve 3, and the outer ends of the one-way slide bar 41 and the two-way slide bar 42 are fixed with anti-slip blocks;

[0050] The side wall of one end of the positioning sleeve 3 is provided with an adapter hole for the one-way sliding rod 41 to slide and extend perpendicular to the central axis of the positioning sleeve 3;

[0051] A side wall at the other end of the positioning sleeve 3 is provided with a limiting groove 31 for allowing the bidirectional sliding rod 42 to simultaneously slide telescopically perpendicular to the central axis of the positioning sleeve 3 and slide horizontally along the central axis of the positioning sleeve 3 .

[0052] As this embodiment, when one end of the expansion and contraction spring 4 is extended by pulling the two-way slide rod 42, since the inner and outer diameters of the expansion and contraction spring 4 will decrease synchronously, both ends of the expansion and contraction spring 4 will retract perpendicular to the extension direction of the expansion and contraction spring 4. That is to say, the one-way slide rod 41 and the two-way slide rod 42 respectively connected to the two ends of the expansion and contraction spring 4 need to pass through the positioning sleeve 3 to retract perpendicular to the extension direction. Therefore, the side wall of the positioning sleeve 3 is provided with an adapter hole for the one-way slide rod 41 to retract inward perpendicular to the extension direction of the expansion and contraction spring 4. At the same time, the limiting groove 31 is provided on the side wall of the positioning sleeve 3. On the one hand, it allows the two-way slide rod 42 to retract inward perpendicular to the extension direction of the expansion and contraction spring 4, and on the other hand, it allows the two-way slide rod 42 to move along the extension direction of the expansion and contraction spring 4.

[0053] The outer wall of the positioning sleeve 3 is threadedly mounted with the adjusting collar 5, and the outer wall of the positioning sleeve 3 is provided with a thread groove that matches the thread on the inner wall of the adjusting collar 5;

[0054] An annular groove 51 is formed at one end of the adjusting collar 5, and a spherical end of a linkage rod 52 is slidably mounted inside the annular groove 51;

[0055] The other end of the linkage rod 52 is connected to the limit block 53, and the end of the bidirectional sliding rod 42 slides through the limit block 53;

[0056] An annular protrusion structure is fixed on the outer wall of the positioning sleeve 3 , and the linkage rod 52 slides through the annular protrusion structure.

[0057] As this embodiment, when the adjusting collar 5 is rotated, the adjusting collar 5 that moves axially will generate an axial thrust on the spherical end of the linkage rod 52 through the annular groove 51. Since the linkage rod 52 is limited by the annular protrusion structure on the outer wall of the positioning sleeve 3, the linkage rod 52 will only move axially with the adjusting collar 5 and will not rotate. Figure 5 and Figure 8 The axially moving linkage rod 52 will axially push the bidirectional sliding rod 42 through the limiting block 53, and synchronously pull one end of the expansion and contraction spring 4 to move axially through the adaptive sliding of the bidirectional sliding rod 42 in the limiting groove 31.

[0058] The side wall of the clamping plate 6 is in contact with the outer surface of the expansion spring 4 , and telescopic rods 61 that slide through the side wall of the positioning sleeve 3 are fixed to both ends of the clamping plate 6 .

[0059] A return spring 62 is wound around the outer wall of the telescopic rod 61 , one end of the return spring 62 is welded to the outer wall of the positioning sleeve 3 , and the other end of the return spring 62 is fixed to the end of the telescopic rod 61 .

[0060] As this embodiment, the splint 6 will always maintain close contact with the spiral outer wall of the expansion and contraction spring 4 and provide additional centripetal force to the spiral outer wall of the expansion and contraction spring 4 with the cooperation of the external telescopic rod 61 and the return spring 62. Its function is to assist the expansion and contraction spring 4 in deformation and compress the expansion and contraction spring 4 to achieve correction of the expansion and contraction spring 4, thereby preventing irregular deformation of the expansion and contraction spring 4 during stretching.

[0061] Centering rods 63 fixed to the side wall of the splint 6 are distributed at equal angles inside the positioning sleeve 3 near the socket centering assembly 8;

[0062] The end of the centering rod 63 is hemispherical, and the distance between the two opposite centering rods 63 is the same as the inner diameter of the expansion spring 4.

[0063] As for this embodiment, the centering rod 63 and the expansion and contraction spring 4 always maintain synchronous movement. Simply put, when the inner diameter of the expansion and contraction spring 4 fits and tightens on the outer wall of the rotor shaft, the inner end of the centering rod 63 also fits and tightens on the outer wall of the rotor shaft. It should be noted that the clamping force of the rotor shaft is provided by the expansion and contraction spring 4 that fits tightly around the outside, rather than the centering rod 63. The centering rod 63 is only used to assist in the centering positioning of the rotor shaft.

[0064] The drive assembly includes a drive motor 7 fixedly connected to the riser 21, and the output shaft of the drive motor 7 passes through the riser 21 through a bearing and is fixedly connected to a gear 71;

[0065] The driving assembly further includes a gear ring 72 fixedly sleeved on the outside of the annular protrusion structure on the outer wall of the positioning sleeve 3 and meshing with the gear 71 .

[0066] Working principle: When using the motor processing rotor shaft to stably clamp the rotating equipment, first place one end of the rotor shaft to be processed inside the expansion spring 4 which initially has the largest diameter, and make the central through hole at the other end of the rotor shaft rest against the core of the socket centering component 8 (the socket centering component 8 can adjust the horizontal position of the core by rotating the screw).

[0067] Then, as Figure 3 and Figure 4As shown, the rotating adjusting collar 5 cooperates with the threaded groove on the outer wall of the positioning sleeve 3 to make the adjusting collar 5 gradually rotate toward the jack centering assembly 8. At the same time, the axially moving adjusting collar 5 will generate an axial thrust on the spherical end of the linkage rod 52 through the annular groove 51. Since the linkage rod 52 is limited by the annular protrusion structure on the outer wall of the positioning sleeve 3, the linkage rod 52 will only move axially with the adjusting collar 5 and will not rotate. Figure 5 and Figure 8 The axially moving linkage rod 52 will axially push the two-way slide rod 42 through the limit block 53, and synchronously pull one end of the expansion and contraction spring 4 to move axially through the adaptive sliding of the two-way slide rod 42 in the limit groove 31, while the other end of the expansion and contraction spring 4 is fixedly connected to the unidirectional slide rod 41. The other end of the expansion and contraction spring 4 will not follow the axial movement due to the restriction of the unidirectional slide rod 41. That is to say, the expansion and contraction spring 4 will be stretched in the form of one end expanding, and when the expansion and contraction spring 4 is subjected to axial tensile force: the spacing between its spiral coils increases, resulting in an increase in the overall length of the expansion and contraction spring 4. Based on the Poisson effect (lateral contraction) of the metal material, its diameter (i.e., the inner and outer diameters of the spiral) will decrease accordingly. This phenomenon is due to the fact that during the stretching process of the expansion and contraction spring 4, the material is subjected to axial tensile stress accompanied by lateral compressive stress, which leads to a reduction in the diameter (Poisson effect: most metal materials, when subjected to unidirectional stress, will not only deform in the stress direction, but also deform in the direction perpendicular to the stress. The special thing is that when the spring is stretched or compressed, it will manifest in the form of diameter expansion and contraction).

[0068] Therefore, as the expansion and contraction spring 4 is gradually stretched, its internal diameter will gradually decrease, thereby gradually centering the rotor shaft inside the expansion and contraction spring 4. At the same time, as the expansion and contraction spring 4 is stretched, its inner and outer diameters will decrease synchronously. Therefore, the splints 6 distributed at equal angles will always keep close contact with the spiral outer wall of the expansion and contraction spring 4 under the cooperation of the external telescopic rod 61 and the return spring 62, and provide additional centripetal force to the spiral outer wall, which assists the expansion and contraction spring 4 in deformation and compresses the expansion and contraction spring 4 to achieve correction of the expansion and contraction spring 4, thereby preventing The spiral of the expansion and contraction spring 4 is irregularly deformed, and at the same time, a centering rod 63 is provided at an equal angle at the end of the clamping plate 6. The centering rod 63 and the expansion and contraction spring 4 always maintain synchronous movement. Simply put, when the inner diameter of the expansion and contraction spring 4 fits and is tightened on the outer wall of the rotor shaft, the inner end of the centering rod 63 also fits and is tightly pressed against the outer wall of the rotor shaft. It should be noted that the clamping force of the rotor shaft is provided by the expansion and contraction spring 4 that fits tightly around the outside, rather than the centering rod 63. The centering rod 63 is only used to assist in the centering of the rotor shaft.

[0069] In addition, it should be noted that when one end of the expansion and contraction spring 4 is pulled to extend by the bidirectional slide rod 42, since the inner and outer diameters of the expansion and contraction spring 4 are synchronously reduced, both ends of the expansion and contraction spring 4 will retract perpendicularly to the extension direction of the expansion and contraction spring 4, that is, the one-way slide rod 41 and the bidirectional slide rod 42 respectively connected to the two ends of the expansion and contraction spring 4 need to pass through the positioning sleeve 3 to retract perpendicularly to the extension direction:

[0070] Therefore, an adapter hole is provided on the side wall of the positioning sleeve 3 for allowing the one-way slide rod 41 to retract inward perpendicular to the extension direction of the expansion and contraction spring 4. At the same time, a limiting groove 31 is provided on the side wall of the positioning sleeve 3, which, on the one hand, allows the two-way slide rod 42 to retract inward perpendicular to the extension direction of the expansion and contraction spring 4, and on the other hand, allows the two-way slide rod 42 to move along the extension direction of the expansion and contraction spring 4.

[0071] After the expansion and contraction spring 4 is tightened around the outer wall of the rotor shaft, the rotation of the adjusting collar 5 is stopped. At this time, the rotor shaft has been centered. Then the drive motor 7 is started to drive the gear 71 to rotate. The gear 71 then drives the gear ring 72 and the positioning sleeve 3 at the center of the gear ring 72, the expansion and contraction spring 4 and the rotor shaft as a whole to rotate in a suspended manner at one end of the vertical plate 21. Finally, the rotor shaft is surface-processed with the help of a processing machine tool, and the diameter of the expansion and contraction spring 4 can be adjusted again by rotating the adjusting collar 5 to meet the dimensional deviation of the rotor shaft after fine turning.

[0072] The present invention adopts the feature that the inner diameter of the spiral of the expansion and contraction spring 4 changes when it is extended and contracted, and cleverly combines the clamping and rotating equipment required for the machining of the rotor shaft, places the rotor shaft in the spiral diameter of the expansion and contraction spring 4, and rotates the adjusting collar 5 outside the positioning sleeve 3 to achieve the stretching of one end of the expansion and contraction spring 4 by the cooperation of parts such as the linkage rod 52, the limit block 53 and the two-way slide rod 42. As the expansion and contraction spring 4 is gradually stretched, its inner diameter of the spiral will gradually decrease, thereby gradually achieving inward retraction and adaptively positioning the rotor shaft in the center. The expansion and contraction spring 4 in the spiral posture will form a circle on the outside of the rotor shaft after being tightened. It forms a relatively closed and evenly distributed wrapping restraining force, which has the advantages of high adaptability and easy adjustment compared to the existing arc-shaped splint clamping mechanism. At the same time, compared with the existing clamping mechanism that can adapt to different shaft diameters, it has the advantages of evenly distributed clamping force and comprehensive stability, realizing the effect of integrating the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism. A splint 6 is arranged around the outside of the expansion and contraction spring 4 to assist the expansion and contraction spring 4 in deformation and compress the expansion and contraction spring 4 to achieve correction of the expansion and contraction spring 4, which can effectively prevent the irregular expansion and contraction deformation of the expansion and contraction spring 4 and reduce the elastic fatigue of the expansion and contraction spring 4.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotor shaft stabilizing and rotating device for motor machining, comprising a workbench (1) and a base plate (2) fixedly mounted on one end surface of the workbench (1), characterized in that: It also includes a positioning sleeve (3) suspended above the base plate (2) for docking the rotor shaft, an expansion spring (4) coaxially arranged inside the positioning sleeve (3) for surrounding and positioning rotor shafts of different sizes, and a plurality of clamping plates (6) distributed at equal angles between the positioning sleeve (3) and the expansion spring (4) for tightening the expansion spring (4) and assisting in centering the rotor shaft. A driving assembly for driving the positioning sleeve (3) to rotate is installed on the upper surface of the base plate (2); A socket centering assembly (8) is mounted on the upper surface of the workbench (1) away from the positioning sleeve (3), which is coaxial with the positioning sleeve (3) and has an adjustable distance from the positioning sleeve (3); A one-way slide bar (41) is fixed to one end of the expansion spring (4) away from the socket centering assembly (8), and a two-way slide bar (42) is fixed to one end of the expansion spring (4) close to the socket centering assembly (8), and both the one-way slide bar (41) and the two-way slide bar (42) are perpendicular to the central axis of the expansion spring (4); The one-way sliding rod (41) and the two-way sliding rod (42) are both slidably inserted into the positioning sleeve (3), and the outer ends of the one-way sliding rod (41) and the two-way sliding rod (42) are both fixed with anti-slip blocks; The side wall of one end of the positioning sleeve (3) is provided with an adapter hole for allowing the one-way sliding rod (41) to slide telescopically perpendicular to the central axis of the positioning sleeve (3); The side wall of the other end of the positioning sleeve (3) is provided with a limiting groove (31) for allowing the bidirectional sliding rod (42) to simultaneously slide telescopically perpendicular to the central axis of the positioning sleeve (3) and slide horizontally along the central axis of the positioning sleeve (3); The side wall of the splint (6) is in contact with the outer surface of the expansion spring (4), and telescopic rods (61) that slide through the side wall of the positioning sleeve (3) are fixed to both ends of the splint (6).

2. The rotor shaft stabilizing clamping and rotating device for motor machining according to claim 1, characterized in that: A vertical plate (21) is fixed to the upper surface of the base plate (2), and the positioning sleeve (3) is rotatably connected to the vertical plate (21) via a bearing; The drive assembly is fixedly mounted on the outer end of the vertical plate (21).

3. The rotor shaft stabilizing clamping and rotating device for motor machining according to claim 2, characterized in that: The outer wall of the positioning sleeve (3) is threadedly mounted with an adjusting collar (5), and the outer wall of the positioning sleeve (3) is provided with a thread groove that matches the thread on the inner wall of the adjusting collar (5); An annular groove (51) is formed at one end of the adjusting collar (5), and a spherical end of a linkage rod (52) is provided in a snap-fitting and sliding manner inside the annular groove (51); The other end of the linkage rod (52) is connected to the limit block (53), and the end of the bidirectional sliding rod (42) slides through the limit block (53); An annular protrusion structure is fixed to the outer wall of the positioning sleeve (3), and the linkage rod (52) slides through the annular protrusion structure.

4. The rotor shaft stabilizing and rotating device for motor machining according to claim 1, characterized in that: A return spring (62) is wound around the outer wall of the telescopic rod (61), one end of the return spring (62) is welded to the outer wall of the positioning sleeve (3), and the other end of the return spring (62) is fixed to the end of the telescopic rod (61).

5. The rotor shaft stable clamping and rotating device for motor machining according to claim 1, characterized in that: Centering rods (63) fixed to the side wall of the splint (6) are distributed at equal angles inside the positioning sleeve (3) near the socket centering assembly (8); The end of the centering rod (63) is hemispherical, and the distance between the two opposite centering rods (63) is the same as the inner diameter of the expansion spring (4).

6. The rotor shaft stabilizing clamping and rotating device for motor machining according to claim 5, characterized in that: The drive assembly comprises a drive motor (7) fixedly connected to the vertical plate (21), and an output shaft of the drive motor (7) passes through the vertical plate (21) via a bearing and is fixedly connected to a gear (71); The drive assembly further comprises a gear ring (72) fixedly sleeved on the outside of the annular protrusion structure on the outer wall of the positioning sleeve (3) and meshing with the gear (71).

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