Rotor shaft stable clamping and rotating equipment for motor machining

Abstract

The invention discloses rotor shaft stable clamping and rotating equipment for motor machining, and relates to the technical field of shaft body positioning, a rotor shaft is arranged in a spiral drift diameter of an expansion and contraction spring, an adjusting lantern ring outside a positioning sleeve is rotated, and one end of the expansion and contraction spring is stretched through cooperation of a linkage rod, a limiting block, a bidirectional sliding rod and other parts; the spiral inner diameter of the expansion and contraction spring is gradually reduced along with gradual stretching of the expansion and contraction spring, so that inward contraction is gradually realized, the rotor shaft can be centered and positioned in a self-adaptive manner, and the expansion and contraction spring in a spiral posture can form relatively closed and uniformly distributed wrapping type binding force outside the rotor shaft after being tightened; compared with an existing arc-shaped clamping plate clamping mechanism, the clamping mechanism has the advantages of being high in adaptation degree and convenient to adjust, meanwhile, compared with an existing clamping mechanism capable of being adaptive to different shaft diameters, the clamping mechanism has the advantages of being uniform in clamping force distribution and comprehensive in stability, and the effect that the two advantages of closed-loop type stable clamping and shaft diameter adaptation are integrated on the same clamping mechanism is achieved.

Description

Technical Field

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

[0002] The motor rotor shaft is a key component inside the 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, and in the processes such as rough turning and fine turning, not only clamping is required, but also the shaft body needs to be driven to rotate so as to perform surface treatment or shape treatment such as surface grinding of the rotor shaft.

[0003] For example, a Chinese patent with publication number CN119458194A proposes a motor rotor shaft stable clamping and rotating device. When the slide plate 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 clamping plate has a relatively complete wrapping property for clamping cylindrical workpieces, and can provide a 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. Clamping of rotor shafts of different sizes requires the use of clamping plates with different arcs, especially when the rotor shaft is rough-machined, there is generally a diameter margin left, and the margin will be removed to reach the standard size after surface grinding and other fine machining. The diameter will change before and after rough turning and fine turning, and the clamping plate with the same arc cannot be adapted;

[0005] There is no shortage of clamping mechanisms that can adapt to different shaft diameters in the prior art. Clamping of shafts of different sizes is achieved by synchronously expanding and contracting the chucks distributed at equal angles. Compared with the arc-shaped clamping plate, it has the advantage of high adaptability, but the disadvantage is also obvious, that is, it cannot form a closed-loop clamping force outside the shaft body like the arc-shaped clamping plate, and a large pressure must be applied 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, and if it is too small, it is easy to cause the shaft body to slide and the power to separate during rotation.

[0006] It is concluded that it is difficult to integrate the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism in the prior art. For this reason, 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 aims at the technical problem that the existing technical solutions are too single, and provides a solution significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a stable clamping and rotating device for the rotor shaft in motor processing to solve the problem in the above-mentioned background technology that it is difficult to integrate the two advantages of closed-loop stable clamping and shaft diameter adaptation on the same clamping mechanism.

[0008] To achieve the above object, the present invention provides the following technical solution: A stable clamping and rotating device for the rotor shaft in motor processing, including a workbench and a bottom plate fixedly installed on one end surface of the workbench, and further including a positioning sleeve suspended above the bottom plate for docking the rotor shaft, a telescopic spring coaxially arranged inside the positioning sleeve for surrounding and positioning rotor shafts of different sizes, and a number of clamping plates equally angularly distributed between the positioning sleeve and the telescopic spring for tightening the telescopic spring and assisting the rotor shaft to be centered and positioned.

[0009] A driving component for driving the positioning sleeve to rotate is installed on the upper surface of the bottom plate.

[0010] A jack centering component coaxial with the positioning sleeve and with adjustable distance from the positioning sleeve is installed on the upper surface of the workbench far from the positioning sleeve.

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

[0012] The driving component is fixedly installed at the outer end of the vertical plate.

[0013] Preferably, a one-way sliding rod is vertically fixed at one end of the telescopic spring away from the jack centering component, and a two-way sliding rod is vertically fixed at one end of the telescopic spring close to the jack centering component.

[0014] Preferably, both the one-way sliding rod and the two-way sliding rod slide through the positioning sleeve, and anti-slip blocks are fixed at the outer ends of the one-way sliding rod and the two-way sliding rod.

[0015] An adaptation hole for the one-way sliding rod to vertically slide in and out perpendicular to the central axis of the positioning sleeve is penetrated and opened on the side wall at one end of the positioning sleeve.

[0016] A limiting groove for the two-way sliding rod to simultaneously vertically slide in and out perpendicular to the central axis of the positioning sleeve and horizontally slide along the central axis of the positioning sleeve is opened on the side wall at the other end of the positioning sleeve.

[0017] Preferably, an adjusting collar is threadedly installed on the outer wall of the positioning sleeve, and a thread groove matching the thread on the inner wall of the adjusting collar is opened on the outer wall of the positioning sleeve.

[0018] An annular groove is opened at one end of the adjusting collar, and the spherical end of a linkage rod is slidably arranged in a snap-fit manner inside the annular groove.

[0019] The other end of the linkage rod is connected with a limit block, and the end of the bidirectional slide rod slidably penetrates through the limit block;

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

[0021] Preferably, the side wall of the clamping plate is attached to the outer surface of the expansion and contraction spring, and telescopic rods that slidably penetrate through the side wall of the positioning sleeve are fixed at 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, centering abutting rods fixed to the side wall of the clamping plate are equiangularly distributed inside the positioning sleeve near the jack centering assembly;

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

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

[0026] The driving assembly further includes a gear ring fixedly sleeved outside the annular convex structure on the outer wall of the positioning sleeve and meshing with the gear.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The present invention adopts the characteristic that the inner diameter of the helix of the expansion and contraction spring changes when it expands and contracts, and cleverly combines the clamping and rotating equipment required for the processing of the rotor shaft. The rotor shaft is placed inside the helical through-diameter of the expansion and contraction spring, and the adjusting collar outside the positioning sleeve is rotated to realize the stretching of one end of the expansion and contraction spring through the cooperation of parts such as the linkage rod, the limit block and the bidirectional slide rod. As the expansion and contraction spring is gradually stretched, its helical inner diameter will gradually decrease, so as to gradually realize inward indentation and can adaptively center and position the rotor shaft. The helical expansion and contraction spring will form a relatively closed and evenly distributed wrapping restraint force outside the rotor shaft after being tightened. Compared with the existing arc-shaped clamping plate 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 stability advantages of uniform and comprehensive clamping force distribution, realizing 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 provided around the expansion and contraction spring to assist the deformation of the expansion and contraction spring and press the expansion and contraction spring to achieve orthopedic correction of the expansion and contraction spring, so as to prevent the 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 the first three-dimensional structure schematic diagram of the present invention.

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

[0032] Figure 3 This is the top view plane structure schematic diagram of the present invention.

[0033] Figure 4 This is the connection structure schematic diagram of the driving component, positioning sleeve and vertical plate of the present invention.

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

[0035] Figure 6 This is the connection structure schematic diagram of the adjusting collar and the bidirectional slide bar of the present invention.

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

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

[0038] In the figure: 1, workbench; 2, bottom plate; 21, vertical plate; 3, positioning sleeve; 31, limit groove; 4, expansion and contraction spring; 41, one-way slide bar; 42, bidirectional slide bar; 5, adjusting collar; 51, annular groove; 52, linkage rod; 53, limit block; 6, splint; 61, telescopic rod; 62, return spring; 63, centering abutting rod; 7, driving motor; 71, gear; 72, toothed ring; 8, jack centering assembly. Detailed Embodiment

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 8, the present invention provides a technical solution: a rotor shaft stable clamping and rotating device for motor processing, including a workbench 1 and a bottom plate 2 fixedly installed on the surface of one end of the workbench 1, and further including a positioning sleeve 3 suspended above the bottom plate 2 for docking the rotor shaft, a telescopic 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 equally angularly distributed between the positioning sleeve 3 and the telescopic spring 4 for tightening the telescopic spring 4 and assisting the rotor shaft to be centered and positioned;

[0041] On the upper surface of the bottom plate 2, a driving component is installed for driving the positioning sleeve 3 to rotate;

[0042] On the upper surface of the workbench 1 away from the positioning sleeve 3, a jack centering component 8 coaxial with the positioning sleeve 3 and with an adjustable distance from the positioning sleeve 3 is installed.

[0043] As an embodiment, the rotor shaft stable clamping and rotating device needs to be used in cooperation with processing machine tools such as grinding machines and is generally not set up separately. Therefore, as shown in the present invention Figures 1 to 3 schematically shows a rotor shaft stable clamping and rotating device arranged on a processing machine tool. At the same time, 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, a central through hole can be used to pass cables or pipes to facilitate the electrical connection or coolant circulation of the motor), most will open a through hole at the center of the rotor shaft, and Figure 1 and Figure 2 the jack centering component 8 shown is used to adapt to the rotor shaft with a central opening. In actual application, for a solid rotor shaft, the method of pressing against with a disc can be adopted, which is prior art and will not be elaborated in the present invention;

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

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

[0046] The driving component is fixedly installed at the outer end of the vertical plate 21.

[0047] As an embodiment, the vertical plate 21 provides a fixed supporting force for the driving component and at the same time suspends the positioning sleeve 3 so that the positioning sleeve 3 can stably receive the driving effect of the driving component.

[0048] One end of the telescopic spring 4 away from the jack centering component 8 is vertically fixed with a one-way slide rod 41, and one end of the telescopic spring 4 close to the jack centering component 8 is vertically fixed with a two-way slide rod 42.

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

[0050] An adaptation hole for the one-way sliding rod 41 to telescopically slide perpendicular to the central axis of the positioning sleeve 3 is formed through the side wall at one end of the positioning sleeve 3;

[0051] A limiting groove 31 for the two-way sliding rod 42 to telescopically slide perpendicular to the central axis of the positioning sleeve 3 and horizontally slide along the central axis of the positioning sleeve 3 is formed in the side wall at the other end of the positioning sleeve 3.

[0052] In this embodiment, when one end of the expansion and contraction spring 4 is pulled by the two-way sliding rod 42 for extension, 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 undergo indentation perpendicular to the extension direction of the expansion and contraction spring 4. That is to say, the one-way sliding rod 41 and the two-way sliding rod 42 respectively connected to both ends of the expansion and contraction spring 4 need to penetrate through the positioning sleeve 3 for indentation perpendicular to the extension direction. Therefore, an adaptation hole for the one-way sliding rod 41 to contract inward perpendicular to the extension direction of the expansion and contraction spring 4 is formed through the side wall of the positioning sleeve 3. At the same time, the limiting groove 31 formed through the side wall of the positioning sleeve 3 can, on the one hand, allow the two-way sliding rod 42 to contract inward perpendicular to the extension direction of the expansion and contraction spring 4, and on the other hand, allow the two-way sliding rod 42 to move along the extension direction of the expansion and contraction spring 4.

[0053] An adjusting collar 5 is threadedly installed on the outer wall of the positioning sleeve 3, and a thread groove matching the thread on the inner wall of the adjusting collar 5 is formed on the outer wall of the positioning sleeve 3;

[0054] An annular groove 51 is formed at one end of the adjusting collar 5, and the spherical end of the linkage rod 52 is slidably arranged in a snap-fit manner inside the annular groove 51;

[0055] The other end of the linkage rod 52 is connected with a limiting block 53, and the end of the two-way sliding rod 42 slidably penetrates through the limiting block 53;

[0056] An annular convex structure is fixed to the outer wall of the positioning sleeve 3, and the linkage rod 52 slidably penetrates through the annular convex structure.

[0057] In this embodiment, when the adjusting collar 5 is rotated, 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 rod body of the linkage rod 52 is limited by the annular convex 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. At the same time, in comparison Figure 5 and Figure 8 the axially moving linkage rod 52 will axially push the two-way 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 fitting sliding of the two-way 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 telescopic spring 4, and telescopic rods 61 that slide through the side wall of the positioning sleeve 3 are fixed at both ends of the clamping plate 6.

[0059] A return spring 62 is wound around the outer wall of the telescopic rod 61, and 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 an embodiment of the present invention, the clamping plate 6 will always be in close contact with the spiral outer wall of the telescopic spring 4 and provide an additional centripetal force to the spiral outer wall of the telescopic spring 4 under the cooperation of the external telescopic rod 61 and the return spring 62. The function is to assist the telescopic spring 4 to deform and press the telescopic spring 4 to achieve the orthosis of the telescopic spring 4, thereby preventing irregular deformation when the telescopic spring 4 is stretched.

[0061] Centering abutting rods 63 fixed to the side wall of the clamping plate 6 are equally angularly distributed inside the positioning sleeve 3 near the jack centering assembly 8;

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

[0063] As an embodiment of the present invention, the centering abutting rod 63 and the telescopic spring 4 always move synchronously. Simply put, when the inner diameter of the telescopic spring 4 fits and tightens on the outer wall of the rotor shaft, the inner end of the centering abutting rod 63 also just fits and abuts tightly on the outer wall of the rotor shaft. It should be noted that the clamping force of the rotor shaft is provided by the externally closely fitting and surrounding telescopic spring 4, rather than the centering abutting rod 63. The centering abutting rod 63 is only used for auxiliary centering positioning of the rotor shaft.

[0064] The driving assembly includes a driving motor 7 fixedly connected to the vertical plate 21, and an output shaft of the driving motor 7 is fixedly connected with a gear 71 through a bearing penetrating the vertical plate 21;

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

[0066] Working principle: When using this rotor shaft stable clamping and rotating device for motor processing, first place one end of the rotor shaft to be processed inside the telescopic spring 4 with the maximum through diameter at the initial time, and make the central through hole at the other end of the rotor shaft abut against the core of the jack centering assembly 8 (the jack centering assembly 8 can adjust the horizontal position of the core by rotating the screw rod).

[0067] Immediately afterwards, 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 generates 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 only moves axially with the adjusting collar 5 and does not rotate. Figure 5 and Figure 8 The axially moving linkage rod 52 will axially push the two-way sliding 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 sliding rod 42 in the limit groove 31, while the other end of the expansion and contraction spring 4 is fixedly connected to the unidirectional sliding 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 sliding rod 41. In other words, 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 while accompanied by the action of lateral compressive stress, which leads to a reduction in the diameter (Poisson effect: when most metal materials are subjected to unidirectional stress, in addition to deformation in the stress direction, they will also deform in the direction perpendicular to the stress. The special thing is that when the spring is stretched or compressed, it will be manifested 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 equiangularly distributed clamping plates 6 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 the 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 arranged 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. In simple terms, when the inner diameter of the expansion and contraction spring 4 is fitted and tightened on the outer wall of the rotor shaft, the inner end of the centering rod 63 also fits tightly 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 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 bar 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 perpendicular to the extension direction of the expansion and contraction spring 4, that is, the one-way slide bar 41 and the bidirectional slide bar 42 respectively connected to the two ends of the expansion and contraction spring 4 need to penetrate the positioning sleeve 3 to retract perpendicular 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 inwardly 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 inwardly 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 ring 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, and the gear 71 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 ring 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 retracted, 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 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 the linkage rod 52, the limit block 53 and the two-way slide rod 42 and other parts. As the expansion and contraction spring 4 is gradually stretched, its spiral inner diameter will gradually decrease, thereby gradually achieving inward retraction and adaptively positioning the rotor shaft in the center, and the expansion and contraction spring 4 in a 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. Compared with the existing arc-shaped 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, 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotor shaft stable clamping and rotating device for motor processing, comprising a workbench (1) and a bottom plate (2) fixedly installed on the surface of one end of the workbench (1), characterized in that: It further includes a positioning sleeve (3) suspended above the bottom plate (2) for docking with the rotor shaft, a telescopic spring (4) coaxially arranged inside the positioning sleeve (3) for surrounding and positioning rotor shafts of different sizes, and several clamping plates (6) equally angularly distributed between the positioning sleeve (3) and the telescopic spring (4) for tightening the telescopic spring (4) and assisting in centering the rotor shaft; On the upper surface of the bottom plate (2), a driving component is installed for driving the positioning sleeve (3) to rotate; On the upper surface of the workbench (1) away from the positioning sleeve (3), a jack centering component (8) coaxial with the positioning sleeve (3) and with an adjustable distance from the positioning sleeve (3) is installed.

2. A rotor shaft stable clamping and rotating device for motor processing according to claim 1, characterized in that: On the upper surface of the bottom plate (2), a vertical plate (21) is fixed, and the positioning sleeve (3) is rotatably connected to the vertical plate (21) through a bearing; The driving component is fixedly installed at the outer end of the vertical plate (21).

3. A rotor shaft stable clamping and rotating device for motor processing according to claim 2, characterized in that: One end of the telescopic spring (4) away from the jack centering component (8) is vertically fixed with a one-way sliding rod (41), and one end of the telescopic spring (4) close to the jack centering component (8) is vertically fixed with a two-way sliding rod (42).

4. A rotor shaft stable clamping and rotating device for motor processing according to claim 3, characterized in that: Both the one-way sliding rod (41) and the two-way sliding rod (42) slide through the positioning sleeve (3), and anti-slip blocks are fixed at the outer ends of the one-way sliding rod (41) and the two-way sliding rod (42); A fitting hole is formed through the side wall at one end of the positioning sleeve (3) for the one-way sliding rod (41) to vertically expand and contract and slide perpendicular to the central axis of the positioning sleeve (3); A limiting groove (31) is formed in the side wall at the other end of the positioning sleeve (3) for the two-way sliding rod (42) to simultaneously expand and contract and slide perpendicular to the central axis of the positioning sleeve (3) and horizontally slide along the central axis of the positioning sleeve (3).

5. The rotor shaft stable clamping and rotating device for motor processing according to claim 3, characterized in that: An adjusting collar (5) is threadedly installed on the outer wall of the positioning sleeve (3), and a thread groove matching the thread on the inner wall of the adjusting collar (5) is formed on the outer wall of the positioning sleeve (3); An annular groove (51) is formed at one end of the adjusting collar (5), and the spherical end of a linkage rod (52) is slidably and snap-fitted in the annular groove (51); The other end of the linkage rod (52) is connected with a limiting block (53), and the end of the two-way sliding rod (42) slidably passes through the limiting block (53); An annular convex structure is fixed on the outer wall of the positioning sleeve (3), and the linkage rod (52) slidably passes through the annular convex structure.

6. A rotor shaft stable clamping and rotating device for motor processing according to claim 4, characterized in that: The side wall of the clamping plate (6) is attached to the outer surface of the telescopic spring (4), and telescopic rods (61) that slidably pass through the side wall of the positioning sleeve (3) are fixed at both ends of the clamping plate (6).

7. A rotor shaft stable clamping and rotating device for motor processing according to claim 6, 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).

8. The rotor shaft stable clamping and rotating device for motor processing according to claim 1, wherein: Centering abutting rods (63) fixed to the side wall of the clamping plate (6) are equally angularly distributed inside the positioning sleeve (3) close to the jack centering component (8); The end of the centering abutting rod (63) is hemispherical, and the distance between two opposite centering abutting rods (63) is the same as the inner diameter of the telescopic spring (4).

9. The rotor shaft stable clamping and rotating device for motor processing according to claim 5, characterized in that: The driving assembly includes a driving motor (7) fixedly connected to the vertical plate (21), and an output shaft of the driving motor (7) is fixedly connected with a gear (71) through a bearing penetrating the vertical plate (21); The driving assembly further includes a toothed ring (72) fixedly sleeved on the outer part of the annular convex structure on the outer wall of the positioning sleeve (3) and meshing with the gear (71).

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