Sectional type stator punching sheet mounting structure and mounting process thereof

Abstract

The invention discloses a sectional type stator punching sheet mounting structure and a mounting process thereof, and relates to the field of motor stators, the sectional type stator punching sheet mounting structure comprises a casing, and an annular first gear ring pressing plate is arranged at an opening, close to one side, on the inner wall of the casing; the second gear ring pressing plate is arranged at the position, close to the opening, of the other end of the machine shell. Each layer of structure is formed by connecting a plurality of sectional type punching sheet units, the shape of each layer of punching sheet unit is matched with the shape of the first gear ring pressing plate and the shape of the second gear ring pressing plate, and each layer of punching sheet unit comprises an annular connecting part and a plurality of tooth parts arranged in the radial direction of the connecting part; the screw rod sequentially penetrates through the first gear ring pressing plate, each layer of punching sheet unit and the second gear ring pressing plate and is locked and fixed; and the plurality of positioning pins are arranged on the tooth parts of the first gear ring pressing plate, each layer of punching sheet unit and the second gear ring pressing plate in a penetrating manner, so that the tooth parts are aligned and positioned. The problem that the stator punching sheet is difficult to install is solved, the problem of leakage of the motor shell is solved, and the problem of installation precision of the stator is solved.

Description

Technical Field

[0001] The invention relates to the field of motor stators, and in particular to a segmented stator punching sheet installation structure and an installation process thereof. Background Art

[0002] Stator laminations are essential parts of motors. In the existing conventional process, stator laminations are made into a full circle, stacked and welded into a stator, and then pressed into the housing. However, this process is not suitable for motors with larger diameters, has higher requirements for laminations, and greatly increases costs.

[0003] like Figure 1 , 2 As shown, there is also a process of segmenting the stator punching sheet and embedding it in the T-key slot, that is, drilling holes on the casing, opening T-key slots on the stator punching sheet, and then fixing the stator punching sheet on the casing with bolts. This process requires many holes to be drilled on the surface of the casing, and each additional hole increases the risk of leakage, affecting the sealing. There is also the defect of more complicated installation. The hole position on the T-key needs to be aligned with the hole on the casing, otherwise it cannot be fixed. Moreover, the motor casing is welded from steel plates, and the inner diameter size is easily deformed. If the internal size of the casing is deviated, it will affect the installation accuracy of the stator punching sheet, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a segmented stator punching installation structure and an installation process thereof, so as to solve the problem of difficulty in installing the stator punching, the problem of leakage in the motor casing, and the problem of stator installation accuracy.

[0005] The object of the present invention is achieved through the following technical solution: a segmented stator punching installation structure, comprising:

[0006] The casing has a plurality of first key slots evenly arranged along the inner wall of the casing for inserting the flat keys, and an annular first gear ring pressure plate is arranged on the inner wall of the casing near an opening on one side;

[0007] The second gear ring pressure plate is also ring-shaped and is arranged at the other end of the casing near the mouth;

[0008] A plurality of layers of punching units, each layer of the structure is formed by a plurality of segmented punching units being detachably connected, the shape of each layer of punching units matches the shape of the first gear ring pressure plate and the second gear ring pressure plate, and each layer of punching units includes an annular connecting portion and a plurality of teeth radially arranged along the connecting portion;

[0009] The screw rod sequentially penetrates the first gear ring pressure plate, each layer of punching units and the second gear ring pressure plate, and is locked and fixed; and

[0010] A plurality of positioning pins are arranged through the teeth of the first gear ring pressure plate, each layer of punching units and the second gear ring pressure plate, so that the teeth of the three are aligned and positioned.

[0011] As a further technical solution, the first gear ring pressure plate adopts an integral structure and is welded in sections to the inner wall of the casing; a number of positioning pin holes are opened on the first gear ring pressure plate for inserting positioning pins, and the positioning pin holes are distributed at intervals on the tooth portion of the first gear ring pressure plate, that is, of two adjacent tooth portions, one has a positioning pin hole, and the other does not.

[0012] As a further technical solution, the second gear ring pressure plate adopts a segmented structure and is welded to the inner wall of the casing; a positioning pin hole is opened on each tooth portion of the second gear ring pressure plate, and a positioning pin hole is opened on each tooth portion of the punching unit, and the positions of the positioning pin holes on the punching unit and the second gear ring pressure plate correspond one to one.

[0013] As a further technical solution, dovetail grooves are provided at both ends of the connection part of the punching unit, adjacent punching units are connected by dovetail grooves, and the connection parts of each layer of punching units are staggered, that is, the dovetail grooves of two adjacent layers of punching units are staggered.

[0014] As a further technical solution, a second keyway is evenly opened on the side of the connecting part of the punching unit away from the tooth part, and the second keyway of each layer of the punching unit corresponds to the first keyway one by one, so that the flat key is embedded and installed between the first keyway and the second keyway.

[0015] As a further technical solution, a plurality of screw fixing holes are provided along the circumferential direction on the connecting parts of the first gear ring pressure plate, each layer of punching units and the second gear ring pressure plate for inserting screws.

[0016] As a further technical solution, a limiting step is provided on the inner wall of the casing near an opening on one side for positioning the first gear ring pressure plate, and a plurality of positioning protrusions are evenly distributed on the connecting portion of the first gear ring pressure plate for embedding in the first keyway.

[0017] A segmented stator punching installation process, using the segmented stator punching installation structure, includes the following steps:

[0018] Step 1: A plurality of first key grooves are formed on the inner wall of the casing along the axial direction, and the first key grooves are evenly distributed along the circumferential direction of the inner wall of the casing;

[0019] Step 2: Weld the first gear ring pressure plate at an opening on one side of the inner wall of the casing by segment welding;

[0020] Step 3: After the first gear ring pressure plate is fixed, positioning pin holes are processed on its tooth portion so that the positioning pin holes are distributed at intervals on the tooth portion of the first gear ring pressure plate;

[0021] Step 4: insert a locating pin into each locating pin hole of the first gear ring pressure plate, and install a flat key in each first keyway;

[0022] Step 5: Take a group of punching units and connect them into a ring shape in sequence using the dovetail grooves on the connecting parts. Repeat the above operation to form several layers of ring-shaped punching units. Place the several layers of punching units layer by layer on the first gear ring pressure plate so that the dovetail grooves of the two adjacent layers of punching units are staggered. Use positioning pins to pass through the corresponding positioning pin holes on the punching units to achieve positioning.

[0023] Step 6: When the stacking height of the punching units meets the requirements, press the second gear ring pressure plate onto the topmost punching unit, align each positioning pin hole of the second gear ring pressure plate with the positioning pin on the punching unit, and insert the screw rod through the screw fixing holes of the first gear ring pressure plate, each layer of punching units and the second gear ring pressure plate in sequence, and tighten and fix them with nuts;

[0024] Step 7: Weld the second gear ring pressure plate to the inner wall of the casing by segment welding.

[0025] As a further technical solution, in step five, during the process of placing the punching units layer by layer, when the positioning pins are completely immersed in the punching units, positioning pins are correspondingly inserted into the positioning pin holes into which the positioning pins are not inserted, to ensure that each section of the punching unit is positioned by the positioning pins. At the same time, the second keyway of each punching unit corresponds one by one with the flat key in the first keyway.

[0026] As a further technical solution, in step six, the redundant positioning pins of the second gear ring pressure plate are cut off and exposed, and the positioning pins are fixed to the positioning pin holes on the first gear ring pressure plate and the second gear ring pressure plate by spot welding.

[0027] The beneficial effects of the present invention are:

[0028] 1. No more holes are opened on the casing, which improves the sealing performance and solves the problem of motor casing leakage;

[0029] 2. The first gear ring pressure plate and the second gear ring pressure plate are welded to the casing by segment welding, which effectively reduces welding deformation and improves the stability and reliability of the overall structure;

[0030] 3. The stator punching is segmented and connected with dovetail grooves, which makes installation and disassembly convenient and efficient, reduces the manufacturing cost of the stator, and is suitable for motors with larger diameters;

[0031] 4. The punching units of each layer are staggered (the dovetail groove joints are staggered), and the positioning pins are also inserted into the corresponding positioning pin holes in a staggered manner to ensure that each layer of punching units has positioning pins for positioning and fixing, which can enhance stability and prevent deformation by magnetic steel;

[0032] 5. During installation, first fix the first gear ring pressure plate, and then process the locating pin hole on the first gear ring pressure plate. Welding will cause a slight deformation of the casing. Welding first and then drilling the locating hole can prevent the locating hole from being affected by deformation, ensuring the roundness and concentricity of the locating pin hole and the locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The structure of the prior art is shown in FIG. Figure 1 .

[0034] Figure 2 The structure of the prior art is shown in FIG. Figure 2 .

[0035] Figure 3 It is a schematic diagram of the structure when processing the housing and the first gear ring pressure plate in the present invention.

[0036] Figure 4 It is a schematic diagram of the structure of installing the positioning pin on the first gear ring pressure plate in the present invention.

[0037] Figure 5 It is a schematic diagram of the structure in which the punching unit is staggered and stacked on the first gear ring pressure plate in the present invention.

[0038] Figure 6 It is a schematic diagram of the structure when the positioning pin is immersed in the punching unit in the present invention.

[0039] Figure 7 It is a schematic diagram of the structure after the second gear ring pressure plate and the punching unit are locked in the present invention.

[0040] Figure 8 for Figure 7 Schematic diagram of the structure after hiding part of the punching unit.

[0041] Fig. 9 It is a schematic diagram of the structure of the casing in the present invention.

[0042] Fig.10 It is a schematic structural diagram of the first gear ring pressure plate in the present invention.

[0043] Fig.11 It is a schematic structural diagram of the second gear ring pressure plate in the present invention.

[0044] Fig.12 It is a structural schematic diagram of the punching unit in the present invention.

[0045] Fig.13 It is a schematic diagram of the structure after the present invention is installed.

[0046] Explanation of the reference numerals: casing 1, positioning pin 2, first gear ring pressure plate 3, flat key 4, punching unit 5, second gear ring pressure plate 6, screw 7, first keyway 8, screw fixing hole 9, positioning pin hole 10, connecting part 11, tooth part 12, dovetail groove 13, second keyway 14, positioning protrusion 15, limiting step 16. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings:

[0048] Embodiment 1: As attached Figures 3 to 13 As shown, a segmented stator punching sheet installation structure includes a casing 1, a positioning pin 2, a first gear ring pressure plate 3, a flat key 4, a punching sheet unit 5, a second gear ring pressure plate 6, a screw 7, a first keyway 8, a screw fixing hole 9, a positioning pin hole 10, a connecting portion 11, a tooth portion 12, a dovetail groove 13, a second keyway 14, a positioning protrusion 15 and a limiting step 16.

[0049] Reference Figure 3 , 9 , a plurality of first key slots 8 are evenly arranged along the axial direction of the inner wall of the housing 1 (i.e., the length direction of the first key slots 8 is consistent with the axial direction of the housing 1), and each first key slot 8 is evenly distributed along the circumferential direction of the inner wall of the housing 1, and a flat key 4 is inserted into the first key slot 8. Preferably, a limiting step 16 is provided on the inner wall of the housing 1 near the opening on one side, and the limiting step 16 can position the first gear ring pressure plate 3. In addition, a plurality of positioning protrusions 15 are evenly distributed on the connecting portion 11 of the first gear ring pressure plate 3, and the positioning protrusions 15 are used to be embedded in the corresponding first key slots 8. Fig.10 As shown, the first gear ring pressure plate 3 adopts an integral annular structure and is welded to the inner wall of the housing 1. A plurality of positioning pin holes 10 are provided on the first gear ring pressure plate 3, and the positioning pins 2 are inserted into the positioning pin holes 10. The positioning pin holes 10 are distributed at intervals on the tooth portions 12 of the first gear ring pressure plate 3, that is, in any two adjacent tooth portions 12, one of them has a positioning pin hole 10, while the other does not.

[0050] like Fig.11 , 13 As shown, the second gear ring pressure plate 6 is also annular and is arranged at the other end of the housing 1 near the mouth. The second gear ring pressure plate 6 adopts a segmented structure (preferably, composed of six segments) and is welded to the inner wall of the housing 1. A positioning pin hole 10 is provided on each tooth portion 12 of the second gear ring pressure plate 6.

[0051] Reference Figure 7 , 12, 13, the punching unit 5 adopts a segmented structure, and several segmented punching units 5 can be detachably connected into a ring shape (forming a layer of punching units 5), and the multiple layers of punching units 5 are stacked layer by layer. The shape of each layer of punching units 5 matches the shape of the first gear ring pressure plate 3 and the second gear ring pressure plate 6, and each layer includes a ring-shaped connecting portion 11 and a plurality of teeth 12 arranged radially along the connecting portion 11. Further, dovetail grooves 13 are arranged at both ends of the connecting portion 11 of the punching unit 5, and the adjacent punching units 5 are connected by the dovetail grooves 13, and the connection points of each layer of punching units 5 are staggered, that is, the dovetail grooves 13 of the adjacent two layers of punching units 5 are staggered. In addition, the second key groove 14 is evenly opened on the side of the connecting portion 11 of the punching unit 5 away from the teeth 12, and the second key groove 14 of each layer of the punching unit 5 corresponds to the first key groove 8 one by one, so that the flat key 4 is embedded and installed between the first key groove 8 and the second key groove 14. A positioning pin hole 10 is provided on each tooth portion 12 of the punching unit 5 , and the positions of the positioning pin holes 10 on the punching unit 5 and the second gear ring pressure plate 6 correspond one to one.

[0052] like Figure 4 , 5 As shown in FIGS. 6 and 7, a plurality of positioning pins 2 are inserted through the teeth 12 of the first gear ring pressure plate 3, each layer of punching units 5 and the second gear ring pressure plate 6, so that the teeth 12 of the three are aligned and positioned. Since the punching units 5 of each layer are staggered (the connection of the dovetail grooves 13 is kept staggered), and the positioning pins 2 are also inserted into the corresponding positioning pin holes 10 in a staggered form, it is ensured that each layer of punching units 5 has positioning pins 2 for positioning and fixing, which can enhance stability and prevent deformation by magnetic steel.

[0053] Reference Figure 7 , 8 , 10, 11, 12, a plurality of screw fixing holes 9 are provided along the circumferential direction on the connecting portion 11 of the first gear ring pressure plate 3, each layer of punching units 5 and the second gear ring pressure plate 6, and the screws 7 pass through the corresponding screw fixing holes 9 in sequence and are locked and fixed with nuts.

[0054] In this embodiment, the SAVDD-720-90-20 motor (low-speed high-torque motor) is taken as an example. The outer diameter of the stator component of the motor is 1330.4 mm. It is made into segmented stator punchings, with a total of 12 pieces in one circle. During installation, the first gear ring pressure plate 3 is first fixed, and then the positioning pin hole 10 is processed on the first gear ring pressure plate 3. Welding will cause a slight deformation of the housing 1. Welding first and then drilling the positioning hole can prevent the positioning hole from being affected by deformation, ensuring the roundness and concentricity of the positioning pin hole 10 and the positioning pin 2.

[0055] Embodiment 2: A segmented stator punching installation process, using the segmented stator punching installation structure in Embodiment 1, comprises the following steps:

[0056] Step 1: If Figure 3 As shown, a plurality of first key grooves 8 are axially provided on the inner wall of the housing 1 , and the first key grooves 8 are evenly distributed along the circumferential direction of the inner wall of the housing 1 .

[0057] Step 2: Weld the first gear ring pressure plate 3 (the thickness of the selected first gear ring pressure plate 3 is 23mm, the shape of its teeth is the same as that of the punching unit 5, and the size is 3mm smaller on one side) by segment welding at the opening on the inner wall of the casing 1, effectively reducing welding deformation and improving the stability and reliability of the overall structure. At the same time, the first gear ring pressure plate 3 is positioned by the limiting step 16 on the inner wall of the casing 1, and the positioning protrusion 15 on the first gear ring pressure plate 3 (connecting portion 11) is correspondingly embedded in the first keyway 8 for positioning.

[0058] Step three: After the first gear ring pressure plate 3 is welded and fixed, positioning pin holes 10 are processed on the tooth portion 12 thereof (preferably, the aperture of the positioning pin holes 10 is 6 mm), so that the positioning pin holes 10 are distributed at intervals on the tooth portion 12 of the first gear ring pressure plate 3, that is, in any two adjacent tooth portions 12, one has a positioning pin hole 10, while the other does not.

[0059] Step 4: If Figure 4 As shown, a locating pin 2 (the selected locating pin 2 has a diameter of 6 mm and a length of 90 mm) is inserted into each locating pin hole 10 of the first gear ring pressure plate 3, and a flat key 4 is installed in each first keyway 8.

[0060] Step 5: If Figure 5 As shown, a group of punching units 5 are connected into a ring shape in sequence using the dovetail grooves 13 on the connecting part 11, and the above operation is repeated to form several layers of ring-shaped punching units 5. The several layers of punching units 5 are placed layer by layer on the first gear ring pressure plate 3, so that the dovetail grooves 13 of the adjacent two layers of punching units 5 are staggered, and the positioning is achieved by passing the positioning pins 2 through the corresponding positioning pin holes 10 on the punching units 5. Further, in the process of placing the punching units 5 layer by layer, when the positioning pins 2 are completely immersed in the punching units 5, the positioning pins 2 are correspondingly inserted into each positioning pin hole 10 where the positioning pins 2 are not inserted, ensuring that each section of the punching unit 5 is positioned by the positioning pins 2, and at the same time, the second key grooves 14 of each punching unit 5 are matched one by one with the flat keys 4 in the first key grooves 8. Specifically, after the 90mm long positioning pins 2 are fully inserted into the first gear ring pressure plate 3, the exposed length is 67mm. When the stack height of the punching units 5 is 67mm, the first group of positioning pins 2 have been completely immersed in the punching units 5. At this time, half of the locating pin holes 10 on the punching unit 5 are empty, and then the second group of 90mm long locating pins 2 are inserted into the other half (empty) locating pin holes 10. This repetition can ensure that each section of the punching unit 5 has a locating pin for positioning.

[0061] Step 6: If Figure 6, 7 As shown, when the stacking height of the punching unit 5 meets the requirement, the second gear ring pressure plate 6 (the thickness of the second gear ring pressure plate 6 is selected to be 19 mm) is pressed onto the topmost punching unit 5, so that each positioning pin hole 10 of the second gear ring pressure plate 6 is aligned with the positioning pin 2 on the punching unit 5, and the screw 7 is passed through the screw fixing holes 9 of the first gear ring pressure plate 3, each layer of the punching unit 5 and the second gear ring pressure plate 6 in sequence, and is locked and fixed with a nut. It is also necessary to cut off the excess positioning pins 2 that expose the second gear ring pressure plate 6, and fix the positioning pins 2 to the positioning pin holes 10 on the first gear ring pressure plate 3 and the second gear ring pressure plate 6 by spot welding.

[0062] Step 7: Finally, the second gear ring pressure plate 6 is welded to the inner wall of the housing 1 by segment welding. Fig.13 As shown, for the convenience of showing, the exposed positioning pins 2 are still retained in the figure, but in fact, the redundant positioning pins 2 should be cut off.

[0063] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A segmented stator punching installation structure, characterized in that: include: A casing (1) is provided with a plurality of first key grooves (8) evenly arranged along the inner wall of the casing (1) for receiving the flat keys (4); and a first annular gear ring pressure plate (3) is arranged on the inner wall of the casing (1) near an opening on one side; The second gear ring pressure plate (6) is also ring-shaped and is arranged at the other end of the casing (1) near the opening; A plurality of layers of punching units (5), each layer of the structure is formed by detachably connecting a plurality of segmented punching units (5), the shape of each layer of the punching units (5) matches the shape of the first gear ring pressure plate (3) and the second gear ring pressure plate (6), and each layer of the punching units (5) comprises an annular connecting portion (11) and a plurality of tooth portions (12) radially arranged along the connecting portion (11); The screw (7) sequentially passes through the first gear ring pressure plate (3), each layer of punching units (5) and the second gear ring pressure plate (6), and is locked and fixed; and A plurality of positioning pins (2) are inserted through the teeth (12) of the first gear ring pressure plate (3), each layer of punching sheet units (5) and the second gear ring pressure plate (6) so that the teeth (12) of the three are aligned and positioned.

2. The segmented stator punching installation structure according to claim 1 is characterized in that: The first gear ring pressure plate (3) adopts an integral structure and is welded in sections to the inner wall of the casing (1); a plurality of positioning pin holes (10) are provided on the first gear ring pressure plate (3) for inserting positioning pins (2); the positioning pin holes (10) are distributed at intervals on the tooth portion (12) of the first gear ring pressure plate (3), that is, in two adjacent tooth portions (12), one has a positioning pin hole (10) and the other does not.

3. The segmented stator punching installation structure according to claim 1 is characterized in that: The second gear ring pressure plate (6) adopts a segmented structure and is welded to the inner wall of the housing (1) in sections; a positioning pin hole (10) is provided on each tooth portion (12) of the second gear ring pressure plate (6), and a positioning pin hole (10) is provided on each tooth portion (12) of the punching unit (5); the positions of the positioning pin holes (10) on the punching unit (5) and the second gear ring pressure plate (6) correspond one to one.

4. The segmented stator punching installation structure according to claim 1 is characterized in that: Both ends of the connection portion (11) of the punching unit (5) are provided with dovetail grooves (13), adjacent punching units (5) are connected via the dovetail grooves (13), and the connection points of each layer of punching units (5) are staggered, that is, the dovetail grooves (13) of two adjacent layers of punching units (5) are staggered.

5. The segmented stator punching installation structure according to claim 1 is characterized in that: A second keyway (14) is evenly arranged on a side of the connection portion (11) of the punching unit (5) away from the tooth portion (12), and the second keyway (14) of each layer of the punching unit (5) corresponds to the first keyway (8) one by one, so that the flat key (4) is embedded and installed between the first keyway (8) and the second keyway (14).

6. The segmented stator punching installation structure according to claim 1 is characterized in that: A plurality of screw fixing holes (9) are provided along the circumferential direction on the connection parts (11) of the first gear ring pressure plate (3), each layer of punching units (5) and the second gear ring pressure plate (6) for inserting screws (7).

7. The segmented stator punching installation structure according to claim 1 is characterized in that: A limiting step (16) is provided on the inner wall of the housing (1) near an opening on one side for positioning the first gear ring pressure plate (3); a plurality of positioning protrusions (15) are evenly distributed on the connecting portion (11) of the first gear ring pressure plate (3) for being embedded in the first keyway (8).

8. A segmented stator punching installation process, using the segmented stator punching installation structure as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: a plurality of first key grooves (8) are provided along the axial direction on the inner wall of the housing (1), wherein the first key grooves (8) are evenly distributed along the circumferential direction of the inner wall of the housing (1); Step 2: Welding the first gear ring pressure plate (3) to the opening on one side of the inner wall of the housing (1) by means of segment welding; Step 3: After the first gear ring pressure plate (3) is fixed, positioning pin holes (10) are processed on the tooth portion (12) thereof, so that the positioning pin holes (10) are distributed at intervals on the tooth portion (12) of the first gear ring pressure plate (3); Step 4: insert a locating pin (2) into each locating pin hole (10) of the first gear ring pressure plate (3), and install a flat key (4) in each first keyway (8); Step 5: Take a group of punching units (5) and connect them into a ring shape in sequence using the dovetail grooves (13) on the connecting part (11), repeat the above operation to form a plurality of layers of ring-shaped punching units (5), place the plurality of layers of punching units (5) layer by layer on the first gear ring pressure plate (3), so that the dovetail grooves (13) of two adjacent layers of punching units (5) are staggered, and use the positioning pins (2) to pass through the corresponding positioning pin holes (10) on the punching units (5) to achieve positioning; Step 6: When the stacking height of the punching units (5) meets the requirements, the second gear ring pressure plate (6) is pressed onto the topmost punching unit (5), so that each positioning pin hole (10) of the second gear ring pressure plate (6) is aligned with the positioning pin (2) on the punching unit (5), and the screw rod (7) is sequentially passed through the screw rod fixing holes (9) of the first gear ring pressure plate (3), each layer of punching units (5) and the second gear ring pressure plate (6), and is locked and fixed with a nut; Step 7: Weld the second gear ring pressure plate (6) to the inner wall of the casing (1) by means of segment welding.

9. The segmented stator punching installation process according to claim 8 is characterized in that: In the step five, during the process of placing the punching units (5) layer by layer, when the positioning pins (10) are completely immersed in the punching units (5), the positioning pins (2) are correspondingly inserted into the positioning pin holes (10) into which the positioning pins (2) are not inserted, so as to ensure that each section of the punching unit (5) is positioned by the positioning pins (2), and at the same time, the second key grooves (14) of each punching unit (5) are matched one by one with the flat keys (4) in the first key grooves (8).

10. The segmented stator punching installation process according to claim 8, characterized in that: In the step six, the redundant positioning pins (2) are cut off to expose the second gear ring pressure plate (6), and the positioning pins (2) are fixed to the positioning pin holes (10) on the first gear ring pressure plate (3) and the second gear ring pressure plate (6) by spot welding.

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