Tool for turning outer circle of stator core
By designing the core shaft structure and clamping method, the problems of shrapnel and low efficiency in the machining of the stator core outer circle are solved, and efficient and coaxial machining of the stator core outer circle is achieved.
Patent Information
- Application Number
- CN202422432166.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing stator core is prone to shrapnel during external turning, and the processing efficiency is low, and the coaxiality of the inner and outer circles is difficult to ensure.
A core shaft structure is designed, including a first holding section, a stator core mounting section, a shoulder section, a rear pressure plate mounting section and a second holding section. Through the combined clamping of the front pressure plate, the rear pressure plate and the locking screw, combined with the fixed connection of the lever and the locking screw, it ensures that the stator core does not generate shrapnel during the processing process, thereby improving the clamping efficiency and the coaxiality of the inner and outer circles.
The shrapnel phenomenon in the machining of the outer circle of the stator core is effectively avoided, the machining efficiency is improved, and the coaxiality of the inner and outer circles of the stator core is guaranteed.
Smart Images
Figure CN223321934U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of motor stator core manufacturing, and particularly relates to a tool for turning the outer circle of the stator core. Background Art
[0002] Existing stator core, such as Figure 8 As shown, the stator core is made of multiple 0.5mm silicon steel sheets that are punched and laminated. During the punching and laminating process, the inner circle of the stator core is limited by the core shaft, so the roundness of the inner circle meets the design requirements. However, the outer circle of the stator core is not bound, so the roundness of the outer circle of the stator core after punching and laminating often does not meet the standards (the outer circle roundness of the stator core does not meet the design requirements, which will affect the heat dissipation effect of the motor). Our company's previous solution was to install the punched and laminated stator core on the core shaft, and then install the core shaft on the jaw disk of the lathe and perform alignment and adjustment. After finishing, the outer cylindrical surface of the stator core is turned to ensure the roundness of the outer cylindrical surface of the stator core. However, in the process of turning the outer cylindrical surface of the existing stator core, shrapnel sometimes occurs. After analysis, it is found that when some stator punching sheets (silicon steel sheets) in the stator core to be turned are not completely compressed during the punching and laminating process, the shrapnel problem is likely to occur; in addition, the existing method of clamping the core shaft through the claw disk requires alignment and adjustment during the turning process, which increases the processing time of turning the outer cylindrical surface of the stator core, that is, reduces the processing efficiency of the stator core. Utility Model Content
[0003] Design purpose: In order to avoid the shortcomings of the background technology, a tool for turning the outer circle of the stator core is designed, which can not only avoid the occurrence of shrapnel when turning the outer circle of the stator core, but also improve the processing efficiency of the stator core, and at the same time ensure the coaxiality of the inner and outer circles of the stator core.
[0004] Design plan: To achieve the above design objectives.
[0005] 1. The core shaft is composed of a first supporting section, a stator core mounting section, a shoulder section, a rear pressure plate mounting section and a second supporting section which are arranged in sequence, and the first supporting section, the stator core mounting section, the shoulder section, the rear pressure plate mounting section and the second supporting section are an integral structure. The symmetric center line of the first supporting section, the symmetric center line of the stator core mounting section, the symmetric center line of the shoulder section, the symmetric center line of the rear pressure plate mounting section and the symmetric center line of the second supporting section all coincide with each other. The diameter of the first supporting section is smaller than the diameter of the stator core mounting section and the stator core is The diameter of the core mounting section is smaller than the diameter of the shoulder section, the diameter of the shoulder section is larger than the diameter of the rear pressure plate mounting section and the diameter of the shoulder section is smaller than the diameter of the stator core, the diameter of the rear pressure plate mounting section is larger than the diameter of the second top holding section; the stator core mounting section is sleeved with the stator core and the rear end face of the stator core is in surface contact with the front end face of the shoulder section, the front pressure plate is provided with a front pressure plate through hole that passes through the front and back sides of the front pressure plate and the diameter of the front pressure plate through hole matches the diameter of the stator core mounting section, the stator core mounting section is sleeved with a There is a front pressure plate and the rear end face of the front pressure plate is in surface contact with the front end face of the stator core. The rear pressure plate is provided with a rear pressure plate through hole that passes through the front and back sides of the rear pressure plate and the diameter of the rear pressure plate through hole matches the diameter of the rear pressure plate mounting section. The front end face of the rear pressure plate is provided with a circular groove and the symmetric center line of the circular groove coincides with the symmetric center line of the rear pressure plate through hole. The diameter of the circular groove matches the diameter of the shoulder section and the depth of the circular groove matches the thickness of the shoulder section. The rear pressure plate mounting section is sleeved with a rear pressure plate and the circular groove in the rear pressure plate The groove and the shoulder section are matched with each other. The front pressure plate is provided with multiple screw through holes 1 and the screw through holes 1 pass through the front and back sides of the front pressure plate. The rear pressure plate is provided with multiple screw through holes 2 and the screw through holes 2 pass through the front and back sides of the rear pressure plate. Each locking screw passes through the corresponding screw through hole 2 on the rear pressure plate, the corresponding slot hole on the stator core, and the corresponding screw through hole 1 on the front pressure plate in turn, and is locked with a locking nut respectively. The design of the locking nut being located on the outside of the front end surface of the front pressure plate is one of the technical features of the present invention.The purpose of such design is that: the core shaft is composed of a first supporting section, a stator core mounting section, a shoulder section, a rear pressure plate mounting section and a second supporting section which are arranged in sequence, and the first supporting section, the stator core mounting section, the shoulder section, the rear pressure plate mounting section and the second supporting section form an integral structure; the symmetric center lines of the first supporting section, the symmetric center lines of the stator core mounting section, the symmetric center lines of the shoulder section, the symmetric center lines of the rear pressure plate mounting section and the symmetric center lines of the second supporting section all coincide; the diameter of the first supporting section is smaller than the diameter of the stator core mounting section and the diameter of the stator core mounting section is smaller than the diameter of the shoulder section; The diameter of the shoulder section is larger than the diameter of the rear pressure plate mounting section and the diameter of the shoulder section is smaller than the diameter of the stator core, and the diameter of the rear pressure plate mounting section is larger than the diameter of the second top holding section; the stator core mounting section is sleeved with the stator core and the rear end face of the stator core is in surface-to-surface contact with the front end face of the shoulder section, the front pressure plate is provided with a front pressure plate through-hole that passes through the front and back sides of the front pressure plate and the diameter of the front pressure plate through-hole matches the diameter of the stator core mounting section, the stator core mounting section is sleeved with a front pressure plate and the rear end face of the front pressure plate is in surface-to-surface contact with the front end face of the stator core, and the rear pressure plate is provided with a through-hole that passes through the rear pressure plate There are rear pressure plate through holes on both sides and the diameter of the rear pressure plate through holes matches the diameter of the rear pressure plate mounting section. The front end surface of the rear pressure plate is provided with a circular groove and the symmetric center line of the circular groove coincides with the symmetric center line of the rear pressure plate through hole. The diameter of the circular groove matches the diameter of the shoulder section and the depth of the circular groove matches the thickness of the shoulder section. The rear pressure plate mounting section is sleeved with a rear pressure plate and the circular groove in the rear pressure plate matches the concave-convex fit of the shoulder section. The front pressure plate is provided with a plurality of screw through holes one and the screw through hole one passes through both sides of the front pressure plate. The rear pressure plate is provided with a plurality of screw through holes two and the screw through holes two pass through Through the front and back sides of the rear pressure plate, each locking screw passes through the corresponding screw through hole 2 on the rear pressure plate, the corresponding slot hole on the stator core, and the corresponding screw through hole 1 on the front pressure plate in sequence, and is locked with a locking nut respectively. The locking nut is located on the outside of the front end surface of the front pressure plate. In this way, the stator core set on the core shaft is fixed and clamped by the front pressure plate, the rear pressure plate, multiple locking screws and locking nuts, thereby avoiding the occurrence of shrapnel during processing and ensuring the coaxiality of the inner and outer circles of the stator core. In addition, a structure of a tool for turning the outer circle of the stator core can improve the clamping efficiency of the stator core.
[0006] 2. The lever member is composed of a mounting sleeve, a lever and a locking screw. The inner hole diameter of the mounting sleeve matches the diameter of the second top holding section. A threaded hole is provided on the outer circumferential surface of the mounting sleeve, and the threaded hole extends inwardly to penetrate the inner hole of the mounting sleeve. A locking screw is screwed into the threaded hole. A lever is provided on the outer circumferential surface of the mounting sleeve, and the symmetry center line of the lever is parallel to the symmetry center line of the mounting sleeve. After the inner hole of the mounting sleeve is plugged into the second top holding section, the mounting sleeve is fixedly connected to the core shaft by tightening the locking screw; a top hole 1 is provided in the exact center of the outer end surface of the first top holding section, and a top hole 2 is provided in the exact center of the outer end surface of the second top holding section. This design is the second technical feature of the present invention. The purpose of this design is that: the lever member is composed of a mounting sleeve, a lever and a locking screw, the inner hole diameter of the mounting sleeve matches the diameter of the second top holding section, a threaded hole is provided on the outer circumferential surface of the mounting sleeve and the threaded hole extends inwardly to penetrate the inner hole of the mounting sleeve, a locking screw is screwed into the threaded hole, a lever is provided on the outer circumferential surface of the mounting sleeve and the symmetry center line of the lever is parallel to the symmetry center line of the mounting sleeve, the mounting sleeve is fixedly connected to the core shaft by tightening the locking screw after the inner hole of the mounting sleeve is plugged into the second top holding section; a center hole 1 is provided at the exact center of the outer end surface of the first top holding section, and a center hole 2 is provided at the exact center of the outer end surface of the second top holding section, and the core shaft is processed in a double-centering manner, which saves the time for alignment and adjustment, thereby improving the processing efficiency of the outer circle of the stator core.
[0007] 3. A keyway 1 is provided on the outer circumferential surface of the shoulder segment in the core shaft, a keyway 2 is provided on the wall surface of the rear pressure plate through hole in the rear pressure plate, and both sides of the keyway 2 extend outward to pass through the front and rear end surfaces of the rear pressure plate, a key block is provided in the keyway 1, and the upper part of the key block is exposed in the keyway 1. The rear pressure plate is plugged into the shoulder segment in the rear pressure plate through hole, and the keyway 2 is matched with the exposed part in the key block and is then sleeved on the shoulder segment. This is the third technical feature of the present invention. The purpose of this design is that: a keyway 1 is provided on the outer circumferential surface of the shoulder segment in the core shaft, a keyway 2 is provided on the wall surface of the rear pressure plate through hole in the rear pressure plate, and both sides of the keyway 2 extend outward to pass through the front and rear end surfaces of the rear pressure plate respectively, a key block is provided in the keyway 1 and the upper part of the key block exposes the keyway 1, the rear pressure plate is inserted into the shoulder segment in the rear pressure plate through hole and the keyway 2 is matched with the exposed part in the key block, and is sleeved on the shoulder segment, keyway 1 is provided on the core shaft, keyway 2 is provided on the rear pressure plate, and keyway 1 and keyway 2 are connected by the key block, so as to ensure that the stator core rotates with the core shaft.
[0008] 4. The design of a spring washer and a flat washer between the locking nut and the front end of the front pressure plate is the fourth technical feature of this utility model. The purpose of this design is to prevent the locking screw and the locking nut from loosening, thereby ensuring the proper fit between the locking screw and the locking nut.
[0009] Technical solution: A tool for turning the outer circle of a stator core, comprising a core shaft, a front pressure plate, a rear pressure plate, a plurality of locking screws and a plurality of locking nuts, wherein the core shaft is composed of a first supporting section, a stator core mounting section, a shoulder section, a rear pressure plate mounting section and a second supporting section arranged in sequence, and the first supporting section, the stator core mounting section, the shoulder section, the rear pressure plate mounting section and the second supporting section are an integral structure, and the symmetrical center line of the first supporting section, the symmetrical center line of the stator core mounting section, the symmetrical center line of the shoulder section, the symmetrical center line of the rear pressure plate mounting section and the second supporting section are The symmetrical center lines of the segments coincide with each other, the diameter of the first supporting segment is smaller than the diameter of the stator core mounting segment, and the diameter of the stator core mounting segment is smaller than the diameter of the shoulder segment, the diameter of the shoulder segment is larger than the diameter of the rear pressure plate mounting segment, and the diameter of the shoulder segment is smaller than the diameter of the stator core, and the diameter of the rear pressure plate mounting segment is larger than the diameter of the second supporting segment; the stator core mounting segment is sleeved with the stator core, and the rear end face of the stator core is in surface contact with the front end face of the shoulder segment, the front pressure plate is provided with a front pressure plate through hole that passes through the front and back sides of the front pressure plate, and the front pressure plate through hole The diameter of the hole matches the diameter of the stator core mounting section. A front pressure plate is sleeved on the stator core mounting section, and the rear end face of the front pressure plate is in surface contact with the front end face of the stator core. The rear pressure plate is provided with a rear pressure plate through-hole that passes through both sides of the rear pressure plate, and the diameter of the rear pressure plate through-hole matches the diameter of the rear pressure plate mounting section. A circular groove is provided on the front end face of the rear pressure plate, and the symmetric center line of the circular groove coincides with the symmetric center line of the rear pressure plate through-hole. The diameter of the circular groove matches the diameter of the shoulder section, and the depth of the circular groove matches the thickness of the shoulder section. The rear pressure plate mounting section is sleeved with a rear pressure plate, and the circular groove in the rear pressure plate is matched with the shoulder section. The front pressure plate is provided with a plurality of screw through holes 1, and the screw through hole 1 passes through the front and back sides of the front pressure plate. The rear pressure plate is provided with a plurality of screw through holes 2, and the screw through holes 2 pass through the front and back sides of the rear pressure plate. Each locking screw passes through the corresponding screw through hole 2 on the rear pressure plate, the corresponding slot hole on the stator core, and the corresponding screw through hole 1 on the front pressure plate in sequence, and is locked with a locking nut respectively. The locking nut is located on the outside of the front end face of the front pressure plate.
[0010] Compared with the background technology, the present invention provides a tool for turning the outer circle of the stator core, which can not only avoid the occurrence of shrapnel when turning the outer circle of the stator core, but also improve the processing efficiency of the stator core, and at the same time ensure the coaxiality of the inner and outer circles of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a tool for turning the outer circle of a stator core (with a stator core clamped therein) in a front view.
[0012] Figure 2 The present invention is a schematic diagram of the three-dimensional structure of a tool for turning the outer circle of a stator core (with a stator core clamped therein) as viewed from the rear.
[0013] Figure 3 It is a schematic diagram of the three-dimensional structure of the core shaft.
[0014] Figure 4 It is a schematic diagram of the three-dimensional structure of the front pressure plate.
[0015] Figure 5 It is a schematic diagram of the three-dimensional structure of the rear pressure plate.
[0016] Figure 6 It is a three-dimensional structural diagram of the shift lever.
[0017] Figure 7 It is a schematic diagram of the three-dimensional structure of a tool for turning the outer circle of the stator core when it is clamped on two centers.
[0018] Figure 8 It is a schematic diagram of the three-dimensional structure of the stator core.
[0019] Figure 9 This is a real picture of the tooling for turning the outer circle of the stator core when it is clamped between two centers.
[0020] Figure 10 This is a physical picture of a tool for turning the outer circle of the stator core (without the lever). DETAILED DESCRIPTION
[0021] Example 1: Refer to the attached Figures 1-10A tool for turning the outer circle of a stator core, comprising a core shaft 1, a front pressure plate 2, a rear pressure plate 3, a plurality of locking screws 4 and a plurality of locking nuts 5, wherein the core shaft 1 is composed of a first supporting section 101, a stator core mounting section 102, a shoulder section 103, a rear pressure plate mounting section 104 and a second supporting section 105 which are arranged in sequence, and the first supporting section 101, the stator core mounting section 102, the shoulder section 103, the rear pressure plate mounting section 104 and the second supporting section 105 are in an integral structure, and the symmetric center line of the first supporting section 101, the symmetric center line of the stator core mounting section 102, the symmetric center line of the shoulder section 103, the symmetric center line of the rear pressure plate mounting section 104 and the first supporting section 105 are in a symmetric center line. The symmetrical center lines of the two supporting sections 105 coincide with each other, the diameter of the first supporting section 101 is smaller than the diameter of the stator core mounting section 102, and the diameter of the stator core mounting section 102 is smaller than the diameter of the shoulder section 103, the diameter of the shoulder section 103 is larger than the diameter of the rear pressure plate mounting section 104, and the diameter of the shoulder section 103 is smaller than the diameter of the stator core 6, and the diameter of the rear pressure plate mounting section 104 is larger than the diameter of the second supporting section 105; the stator core mounting section 102 is sleeved with the stator core 6, and the rear end face of the stator core 6 is in surface contact with the front end face of the shoulder section 103, and the front pressure plate 2 is provided with a front pressure plate through hole that passes through the front and back sides of the front pressure plate 2 21 and the diameter of the front pressure plate through hole 21 matches the diameter of the stator core mounting section 102, the stator core mounting section 102 is sleeved with a front pressure plate 2 and the rear end face of the front pressure plate 2 is in surface contact with the front end face of the stator core 6, the rear pressure plate 3 is provided with a rear pressure plate through hole 31 that passes through the front and back sides of the rear pressure plate 3 and the diameter of the rear pressure plate through hole 31 matches the diameter of the rear pressure plate mounting section 104, the front end face of the rear pressure plate 3 is provided with a circular groove 35 and the symmetric center line of the circular groove 35 coincides with the symmetric center line of the rear pressure plate through hole 31, the diameter of the circular groove 35 matches the diameter of the shoulder section 103 and the depth of the circular groove 35 matches the depth of the shoulder section 103 The thickness is matched, the rear pressure plate mounting section 104 is sleeved with a rear pressure plate 3 and the circular groove 35 in the rear pressure plate 3 is matched with the shoulder section 103, the front pressure plate 2 is provided with a plurality of screw through holes 22 and the screw through holes 22 pass through the front and back sides of the front pressure plate 2, the rear pressure plate 3 is provided with a plurality of screw through holes 2 32 and the screw through holes 2 32 pass through the front and back sides of the rear pressure plate 3, each locking screw 4 passes through the corresponding screw through hole 2 32 on the rear pressure plate 3, the corresponding slot hole 61 on the stator core 6, and the corresponding screw through hole 1 22 on the front pressure plate 2 in turn, and is locked with a locking nut 5 respectively, and the locking nut 5 is located on the outside of the front end face of the front pressure plate 2.
[0022] The device further includes a lever member 7, which is composed of a mounting sleeve 71, a lever 72, and a locking screw 73. The inner diameter of the mounting sleeve 71 matches the diameter of the second supporting section 105. A threaded hole is provided on the outer circumference of the mounting sleeve 71, and the threaded hole extends inwardly to intersect with the inner hole of the mounting sleeve 71. A locking screw 73 is screwed into the threaded hole. The outer circumference of the mounting sleeve 71 is provided with a lever 72, and the symmetric centerline of the lever 72 is parallel to the symmetric centerline of the mounting sleeve 71. After the inner hole of the mounting sleeve 71 is plugged into the second supporting section 105, the mounting sleeve 71 is fixedly connected to the core shaft 1 by tightening the locking screw 73. A top hole 1011 is provided at the center of the outer end surface of the first supporting section 101, and a top hole 2 1051 is provided at the center of the outer end surface of the second supporting section 105.
[0023] A keyway 1041 is provided on the outer circumferential surface of the rear pressure plate mounting section 104 in the core shaft 1, a keyway 2 33 is provided on the wall surface of the rear pressure plate through hole 31 in the rear pressure plate 3, and both sides of the keyway 2 33 extend outward to pass through the front and rear end surfaces of the rear pressure plate 3, a key block 8 is provided in the keyway 1041, and the upper part of the key block is exposed to the keyway 1041, and the rear pressure plate 3 is sleeved on the rear pressure plate mounting section 104 after the circular groove 35 is concave-convexly matched with the shoulder section 103 and the keyway 2 33 is concave-convexly matched with the exposed part of the key block 8.
[0024] The stator core 6 has a plurality of stator core grooves 62 formed on its outer circumferential surface, and the stator core grooves 62 extend through both end surfaces of the stator core 6. The front pressure plate 2 has a plurality of front pressure plate grooves 24 formed on its outer circumferential surface, and the front pressure plate grooves 24 extend through both end surfaces of the front pressure plate 2. The rear pressure plate 3 has a plurality of rear pressure plate grooves 34 formed on its outer circumferential surface, and the rear pressure plate grooves 34 extend through both end surfaces of the rear pressure plate 3. When the front pressure plate 2 and the rear pressure plate 3 are fastened to both end surfaces of the stator core 6 by a plurality of locking screws 4 and a plurality of locking nuts 5, one side of the stator core groove 62 extends through the corresponding front pressure plate groove 24, and the other side of the stator core groove 62 extends through the corresponding rear pressure plate groove 34. The locking nuts 5 are in contact with the front end surface of the front pressure plate 2.
[0025] Example 2: Based on Example 1, a spring washer and a flat washer are provided between the locking nut 5 and the front end surface of the front pressure plate 2 .
[0026] It should be understood that although the above embodiments provide a relatively detailed textual description of the design ideas of the present invention, these textual descriptions are merely simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A tool for turning the outer circle of a stator core, comprising a core shaft (1), a front pressure plate (2), a rear pressure plate (3), a plurality of locking screws (4) and a plurality of locking nuts (5), characterized in that: The core shaft (1) is composed of a first supporting section (101), a stator core mounting section (102), a shoulder section (103), a rear pressure plate mounting section (104) and a second supporting section (105) which are arranged in sequence. The first supporting section (101), the stator core mounting section (102), the shoulder section (103), the rear pressure plate mounting section (104) and the second supporting section (105) are in an integral structure. The symmetric center lines of the first supporting section (101), the symmetric center lines of the stator core mounting section (102), the symmetric center lines of the shoulder section (103), the symmetric center lines of the rear pressure plate mounting section (104) and the symmetric center lines of the second supporting section (105) are all coincident. The diameter of the first supporting section (101) is smaller than that of the stator core mounting section (102). The diameter of the mounting section (102) is greater than the diameter of the stator core mounting section (102), and the diameter of the stator core mounting section (102) is smaller than the diameter of the shoulder section (103); the diameter of the shoulder section (103) is greater than the diameter of the rear pressure plate mounting section (104), and the diameter of the shoulder section (103) is smaller than the diameter of the stator core (6); the diameter of the rear pressure plate mounting section (104) is greater than the diameter of the second supporting section (105); the stator core (6) is sleeved on the stator core mounting section (102), and the rear end face of the stator core (6) is in surface contact with the front end face of the shoulder section (103); the front pressure plate (2) is provided with a front pressure plate through hole (21) that passes through the front and back sides of the front pressure plate (2), and the diameter of the front pressure plate through hole (21) is equal to the diameter of the stator core mounting section (102). Matching, the stator core mounting section (102) is sleeved with a front pressure plate (2) and the rear end face of the front pressure plate (2) is in surface contact with the front end face of the stator core (6), the rear pressure plate (3) is provided with a rear pressure plate through hole (31) that passes through the front and back sides of the rear pressure plate (3), and the diameter of the rear pressure plate through hole (31) matches the diameter of the rear pressure plate mounting section (104), the front end face of the rear pressure plate (3) is provided with a circular groove (35), and the symmetric center line of the circular groove (35) coincides with the symmetric center line of the rear pressure plate through hole (31), the diameter of the circular groove (35) matches the diameter of the shoulder section (103), and the depth of the circular groove (35) matches the thickness of the shoulder section (103), and the rear pressure plate mounting section (104) is provided with a rear pressure plate through hole (31) that passes through the front and back sides of the rear pressure plate (3). A rear pressure plate (3) is provided in the sleeve, and the circular groove (35) in the rear pressure plate (3) is matched with the shoulder section (103) in a concave-convex manner. The front pressure plate (2) is provided with a plurality of screw through holes (22) and the screw through holes (22) pass through the front and back sides of the front pressure plate (2). The rear pressure plate (3) is provided with a plurality of screw through holes (32) and the screw through holes (32) pass through the front and back sides of the rear pressure plate (3). Each locking screw (4) passes through the corresponding screw through hole (32) on the rear pressure plate (3), the corresponding slot (61) on the stator core (6), and the corresponding screw through hole (22) on the front pressure plate (2) in sequence, and is locked with a locking nut (5) respectively. The locking nut (5) is located on the outside of the front end surface of the front pressure plate (2).
2. The tool for turning the outer circle of the stator core according to claim 1, characterized in that: The invention also includes a lever member (7), the lever member (7) being composed of a mounting sleeve (71), a lever (72) and a locking screw (73), the inner hole diameter of the mounting sleeve (71) matching the diameter of the second top holding section (105), a threaded hole being provided on the outer circumferential surface of the mounting sleeve (71) and the threaded hole extending inwardly and intersecting the inner hole of the mounting sleeve (71), a locking screw (73) being screwed into the threaded hole, a lever (72) being provided on the outer circumferential surface of the mounting sleeve (71) and the symmetric center line of the lever (72) being parallel to the symmetric center line of the mounting sleeve (71), and the mounting sleeve (71) being fixedly connected to the core shaft (1) by tightening the locking screw (73) after the inner hole of the mounting sleeve (71) is plugged into and matched with the second top holding section (105).
3. The tool for turning the outer circle of the stator core according to claim 2, characterized in that: A first top hole (1011) is provided at the exact center of the outer end surface of the first supporting section (101), and a second top hole (1051) is provided at the exact center of the outer end surface of the second supporting section (105).
4. The tool for turning the outer circle of a stator core according to claim 1 or 2, characterized in that: A keyway 1 (1041) is provided on the outer circumferential surface of the rear pressure plate mounting section (104) in the core shaft (1), a keyway 2 (33) is provided on the hole wall surface of the rear pressure plate through hole (31) in the rear pressure plate (3), and both sides of the keyway 2 (33) extend outwards and pass through the front and rear end surfaces of the rear pressure plate (3), a key block (8) is provided in the keyway 1 (1041), and the upper part of the key block is exposed from the keyway 1 (1041), and the rear pressure plate (3) is sleeved on the rear pressure plate mounting section (104) after the circular groove (35) and the shoulder section (103) are matched in a concave-convex manner, and the keyway 2 (33) and the exposed part of the key block (8) are matched in a concave-convex manner.
5. The tool for turning the outer circle of a stator core according to claim 1, characterized in that: The stator core (6) is provided with a plurality of stator core grooves (62) on the outer circumferential surface, and the stator core grooves (62) pass through the two side end surfaces of the stator core (6); the front pressure plate (2) is provided with a plurality of front pressure plate grooves (24) on the outer circumferential surface, and the front pressure plate grooves (24) pass through the two side end surfaces of the front pressure plate (2); the rear pressure plate (3) is provided with a plurality of rear pressure plate grooves (34) on the outer circumferential surface, and the rear pressure plate grooves (34) pass through the two side end surfaces of the rear pressure plate (3); when the front pressure plate (2) and the rear pressure plate (3) are locked and fixed on the two side end surfaces of the stator core (6) by a plurality of locking screws (4) and a plurality of locking nuts (5), one side of the stator core groove (62) is connected to the corresponding front pressure plate groove (24) and the other side of the stator core groove (62) is connected to the corresponding rear pressure plate groove (34).
6. The tool for turning the outer circle of a stator core according to claim 1, characterized in that: The locking nut (5) is in contact with the front end surface of the front pressure plate (2).
7. The tool for turning the outer circle of a stator core according to claim 1, characterized in that: A spring washer and a flat washer are provided between the locking nut (5) and the front end surface of the front pressure plate (2).