WO2021121248A1

WO2021121248A1 - Electric motor stator assembly press-in machine

Info

Publication number: WO2021121248A1
Application number: PCT/CN2020/136720
Authority: WO
Inventors: 陶峰; 谭海军; 俞晨凯
Original assignee: 江苏久知电机股份有限公司
Priority date: 2019-12-19
Filing date: 2020-12-16
Publication date: 2021-06-24

Abstract

Disclosed is an electric motor stator assembly press-in machine, a hydraulic machine tool (100) is arranged, such that power for pressing a stator assembly (400) into an electric motor shell (300) is provided, and the efficiency is high; a die (200) is connected to the lower surface of a top plate (1011) of the hydraulic machine tool (100), and the die (200) avoids a stator rivet head (401) on the stator assembly (400), such that the phenomenon that the stator rivet head (401) is damaged when the stator (400) is pressed in the electric motor shell (300) is prevented; and meanwhile, the technical effect that the position of an adjusting column (202) is automatically adjusted according to the position of the stator rivet head (401) to avoid the stator rivet head (401) is achieved by arranging the telescopic adjusting column (202) in a mounting hole (2011) of a die main body (201) and arranging an avoiding column (2024) capable of moving up and down in the adjusting column (202), such that the same die can adapt to the pressing-in of all the stator assemblies (400) under the same outer diameter, the rejection rate is reduced, the resource utilization rate is improved, and the phenomenon of capital stagnation is avoided.

Description

Press-in machine for motor stator assembly

Technical field

The invention relates to the field of motor manufacturing, in particular to a motor stator assembly press-in machine.

Background technique

In the existing motor assembly process, manual operation is usually used to assemble the stator assembly into the motor casing. Since the outer diameter of the stator assembly and the inner diameter of the motor casing are tightly matched, the operator sets the finished stator assembly After reaching the opening of the motor housing, the stator assembly needs to be inserted into the motor housing by hammering. This method has extremely low work efficiency. At the same time, it is extremely easy to use the hammer during the process of striking the stator assembly. The stator rivet head on the end face of the stator assembly was smashed, resulting in scrap.

The use of a mold set on the upper part of the stator can prevent the stator rivet head from being smashed. However, the position of the stator rivet head will change when the riveted pull tabs increase or decrease, and the stator connection head is not fixed, making the stator wiring The relative position of the head and the stator rivet head is also not fixed, and it is necessary to prepare multiple molds to avoid stator rivet heads in different positions, causing serious waste of resources and sluggish funds.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a motor stator assembly press-in machine with high production efficiency. The machine can automatically adjust the mold according to the position of the stator rivet head to avoid stator rivets in different positions. Head, reduce scrap, improve resource utilization, and avoid capital sluggishness.

In order to achieve the above objective, the technical solution adopted by the present invention is a motor stator assembly press-in machine, which includes a hydraulic machine tool and a die. A top plate is fixed on the head of the hydraulic machine tool, and the die is detachably connected to the machine. On the lower surface of the top plate, the workbench of the hydraulic machine tool has an L-shaped turning frame, the turning frame has a pressure-bearing plate and a base backing plate, one side of the pressure-bearing plate and one of the base backing plate The sides are connected at right angles, the connection between the pressure-bearing plate and the base backing plate is rotatably connected to one side of the workbench, and a jacking cylinder is arranged under the pressure-bearing plate;

The mold includes a main body and an adjustment column;

The outer diameter of the main body is equal to the outer diameter of the stator assembly, and the lower end surface of the main body is provided with a plurality of mounting holes uniformly distributed in a ring shape along the center of the lower end surface, and the mounting holes are parallel to the axial direction of the main body. The outer wall of the main body is provided with a mating hole extending perpendicular to the outer wall to the center of the main body to the mounting hole, and the extension line of the axis of the mating hole and the axis of the mounting hole The heart lines are perpendicular and intersect;

The adjusting column is slidably inserted in the mounting hole, the sliding direction of the adjusting column is parallel to the axis line of the mounting hole, and the upper part of the adjusting column is provided with penetrating in the radial direction of the adjusting column. In the sliding groove of the adjusting column, a ball capable of sliding left and right along the sliding groove is arranged in the sliding groove, and the diameter of the ball is larger than the hole diameter of the matching hole. On time, the ball can roll toward the mating hole and be embedded in the mating hole, so that a part of the ball protrudes from the outer circumferential surface of the main body; the middle of the lower end surface of the adjusting column is provided with a penetrating through in the up and down direction The avoiding hole of the adjusting column, the avoiding hole is provided with an avoiding column that can slide up and down, the upper end of the adjusting column is provided with a pressing cover for covering the avoiding hole, the pressing cover and the adjusting column The lower end surface of the gland and the upper end surface of the avoiding column are connected by a first spring, and the outer circumferential surface of the upper part of the avoiding column is provided with a groove for accommodating the ball;

The avoiding column has a first working position and a second working position. When the avoiding column is in the first working position, the lower end surface of the avoiding column is flush with the lower end surface of the adjusting column, and the groove is located Below the center of the ball, the first spring is stretched, and the pulling force generated by the first spring on the avoiding column is equal to the gravity of the avoiding column; when the avoiding column is in the second working position, The avoiding column moves upward, the first spring is compressed, a space for accommodating the stator rivet head is formed between the lower end surface of the avoiding column and the lower end surface of the adjusting column, and the groove is aligned with the sliding groove .

Preferably, the mounting hole is a blind hole.

Further preferably, the mold further includes a second spring located between the upper end surface of the adjustment column and the bottom wall of the mounting hole.

Further preferably, the second spring has a tendency to drive the adjustment column to move downward.

Preferably, the shortest distance between the adjacent mounting holes is 2 mm.

Preferably, the diameter of the mounting hole is 5-12 mm.

Preferably, the main body is a hollow cylinder, the inner diameter of the main body is smaller than the inner diameter of the stator assembly, and the material of the main body is 45# steel.

Preferably, the material of the adjustment column is stainless steel.

Preferably, the mold and the top plate are connected by threaded fitting.

Further preferably, the upper end of the jacking cylinder is rotatably connected to the lower surface of the pressure bearing plate, and the lower end of the jacking cylinder is rotatably connected to the ground. Further preferably, the upper end of the jacking cylinder is rotatably connected to the ground. The lower surface of the pressure-bearing plate is rotatably connected, and the lower end of the jacking cylinder is rotatably connected to the ground.

In order to achieve the above objective, the technical solution adopted by the present invention is a motor stator assembly press-in machine, including a hydraulic machine tool and a mold, which is characterized by:

A top plate is fixed on the head of the hydraulic machine tool, and the mold is detachably connected to the lower surface of the top plate. The working table of the hydraulic machine tool has an L-shaped turning frame, and the turning frame has a bearing. The pressure plate and a base backing plate, one side of the pressure-bearing plate and one side of the base backing plate are connected at right angles, and the connection between the pressure-bearing plate and the base backing plate is rotatably connected to one side of the workbench, A jacking cylinder is arranged under the pressure-bearing plate;

The mold includes a main body and an adjustment column;

The avoiding column has a first working position and a second working position. When the avoiding column is in the first working position, the lower end surface of the avoiding column is flush with the lower end surface of the adjusting column, and the groove is located Below the center of the ball, the first spring is stretched, and the pulling force generated by the first spring on the avoiding column is equal to the gravity of the avoiding column; when the avoiding column is in the second working position, The avoiding column moves upward, the first spring is compressed, a space for accommodating the stator rivet head is formed between the lower end surface of the avoiding column and the lower end surface of the adjusting column, and the groove is aligned with the sliding groove ；

The mounting hole is a blind hole;

The mold further includes a second spring located between the upper end surface of the adjustment column and the bottom wall of the mounting hole;

The second spring has a tendency to drive the adjustment column to move downward;

The shortest distance between the adjacent mounting holes is 2mm;

The diameter of the mounting hole is 5-12mm;

The main body is a hollow cylinder, the inner diameter of the main body is smaller than the inner diameter of the stator assembly, and the material of the main body is 45# steel;

The material of the adjustment column is stainless steel;

The mold and the top plate are connected by threaded fitting;

The upper end of the jacking cylinder is rotatably connected to the lower surface of the pressure bearing plate, and the lower end of the jacking cylinder is rotatably connected to the ground.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

The motor stator assembly press-in machine provided by the present invention provides the power to press the stator assembly into the motor casing by setting a hydraulic machine tool, and has high efficiency. The die is connected to the lower surface of the top plate of the hydraulic machine tool, and the stator on the stator assembly is avoided by the die. The rivet head prevents damage to the rivet head of the stator when the stator is pressed into the motor housing. At the same time, a retractable adjustment column is set in the mounting hole of the mold body, and a movable up and down is provided in the adjustment column. The avoidance column realizes the technical effect of automatically adjusting the position of the adjustment column according to the position of the stator rivet head to avoid the stator rivet head, so that the same mold can adapt to the press-in of all stator components under the same outer diameter, reducing scrap and improving resources Utilization rate, to avoid capital sluggishness.

Description of the drawings

Figure 1 is a schematic front view of the present invention, when the jacking cylinder is in a retracted state.

Figure 2 is a schematic front view of the present invention, when the jacking cylinder is in an extended state.

Fig. 3 is a partial enlarged view of the mold in Fig. 1.

Fig. 4 is a cross-sectional view in the direction of A-A in Fig. 3.

Fig. 5 is a partial enlarged view of B in Fig. 4, at this time, the avoiding column is in the first working position.

Fig. 6 is a partial enlarged view of B in Fig. 4, at this time, the avoiding column is in the second working position.

Among them: 100. Hydraulic machine tool; 101. Machine head; 1011. Top plate; 102. Workbench; 1021. Turning frame; 1022. Bearing plate; 1023. Base plate; 103. Jacking cylinder; 200. Mould; 201. Main body; 2011. Mounting hole; 2012. Matching hole; 202. Adjusting column; 2021. Slide groove; 2022. Ball; 2023. Avoidance hole; 2024. Avoidance column; 2025. Gland; 2026. First spring; 2027. Concave Slot; 203. Second spring; 300. Motor housing; 400. Stator assembly; 401. Stator rivet head.

Detailed ways

The technical scheme of the present invention will be further explained below in conjunction with the accompanying drawings:

The up and down directions in the present invention refer to the up and down directions in FIG. 1, and the left and right directions in the present invention refer to the left and right directions in FIG. 4.

As shown in Figure 1-2, the present invention provides a motor stator assembly press-in machine, including a hydraulic machine tool 100 and a mold 200, wherein the hydraulic machine tool includes a machine head 101, a worktable 102, a jacking cylinder 103, and a machine head 101. To provide pressure for pressing the stator assembly 400 into the motor housing 300, the machine head 101 is a hydraulic cylinder; a top plate 1011 is fixed at the lower end of the machine head 101, and the mold 200 is detachably connected to the lower surface of the top plate 1011. The mold 200 and the top plate 1011 are connected by threaded fit. The workbench 102 has an L-shaped turning frame 1021, the turning frame 1021 has a pressure-bearing plate 1022 and a base backing plate 1023, one side of the pressure-bearing plate 1022 and the base backing plate One side of 1023 is connected at a right angle. The connection between the pressure-bearing plate 1022 and the base backing plate 1023 is rotatably connected to one side of the worktable 102. A jacking cylinder 103 is provided under the pressure plate 1022. The upper end is rotatably connected to the lower surface of the pressure-bearing plate 1022, and the lower end of the jacking cylinder 103 is rotatably connected to the ground; when hoisting the motor housing 300 to the turning frame 1021, first turn the turning frame 1021 to make the base The backing plate 1023 is parallel to the horizontal plane. At this time, the pressure-bearing plate 1022 is perpendicular to the horizontal plane. The crane can smoothly hoist the motor housing 300 to the base backing plate 1023. After hoisting, the motor housing 300 is fixed to the base by bolts. Then, the turning frame 1021 is turned over so that the pressure-bearing plate 1022 is parallel to the horizontal plane and carried on the workbench 102, the base backing plate 1023 is perpendicular to the horizontal plane, and the opening of the motor housing 300 is located directly below the mold 200.

As shown in Figures 1-4, the mold 200 includes a main body 201, an adjusting column 202, and a second spring 203. The main body 201 is a hollow cylinder, the material of the main body 201 is 45# steel, and the outer diameter of the main body 201 is connected to the stator assembly 400. The outer diameter of the main body 201 is smaller than the inner diameter of the stator assembly 400. The lower end surface of the main body 201 is provided with a plurality of mounting holes 2011 uniformly distributed along the center of the lower end surface. The mounting holes 2011 are blind holes. The shortest distance between the mounting holes 2011 is 2mm, the hole diameter of the mounting holes 2011 is 5-12mm, and the mounting holes 2011 extend upward in a direction parallel to the axial direction of the main body 201, and the outer wall of the main body 201 is provided with perpendicular to the outer wall toward the main body The center of 201 extends to the mating hole 2012 of the mounting hole 2011, and the extension line of the axis line of the mating hole 2012 is perpendicular and intersecting with the axis line of the mounting hole 2011; the adjustment post 202 is slidably inserted in the mounting hole 2011, and the adjustment post 202 Is made of stainless steel, the sliding direction of the adjusting column 202 is parallel to the axis line of the mounting hole 2011, the upper part of the adjusting column 202 is provided with a sliding groove 2021 that penetrates the adjusting column 202 in the radial direction of the adjusting column 202, and the sliding groove 2021 is provided with The ball 2022 sliding left and right along the sliding groove 2021, the diameter of the ball 2022 is larger than the hole diameter of the matching hole 2012, the center of the lower end surface of the adjustment post 202 is provided with a relief hole 2023 that penetrates the adjustment post 202 in the vertical direction, and the relief hole 2023 is provided with a The avoiding post 2024 sliding up and down, the upper outer circumferential surface of the avoiding post 2024 is provided with a groove 2027 for accommodating the balls 2022, the upper end surface of the adjusting column 202 is provided with a gland 2025, and the gland 2025 is threadedly connected with the upper end of the adjusting column 202, The gland 2025 is used to cover the avoiding hole 2023, and the lower end surface of the gland 2025 and the upper end surface of the avoiding column 2024 are connected by a first spring 2026; the second spring 203 is arranged on the upper end surface of the adjusting column 202 and the mounting hole 2011 Between the bottom walls, the second spring 203 has a tendency to drive the adjustment column 203 downward.

The avoiding column 2024 has a first working position and a second working position. When the avoiding column 2024 is in the first working position, as shown in FIG. 5, the lower end surface of the avoiding column 2024 is flush with the lower end surface of the adjusting column 202, and the groove 2027 Located below the center of the ball 2022, the sliding groove 2021 is aligned with the mating hole 2012. The ball 2022 rolls in the direction of the mating hole 2012 under the effect of the part C on the avoiding column 2024 and is embedded in the mating hole 2012, a part of the ball 2022 Protruding from the outer circumferential surface of the main body 201, the position shown at C on the avoiding post 2024 tightens the ball 2022, so that the ball 2022 can lock the relative position of the adjustment post 202 and the main body 201, and the first spring 2026 is in a passive position. In the stretched state, the pulling force generated by the first spring 2026 on the avoiding column 2024 is equal to the gravity received by the avoiding column 2024; when the avoiding column 2024 is in the second working position, as shown in Figure 6, the avoiding column 2024 moves upward to avoid The lower end surface of the column 2024 is higher than the lower end surface of the adjusting column 202, and a space for accommodating the stator rivet head 401 protruding from the end surface of the stator assembly 400 is formed between the lower end surface of the avoiding column 2024 and the lower end surface of the adjusting column 202, and the groove 2027 is aligned and sliding. Slot 2021. At this time, the machine head 101 continues to drive the mold 200 down, and drives the main body 201 to move downward, so that the adjustment post 202 moves upward relative to the main body 201, and the adjustment post 202 moves upward relative to the main body 201 for the following reasons:

1. The lower end surface of the adjusting column 202 is supported by the upper end surface of the stator assembly 400, so that the adjusting column 202 moves upward relative to the main body 201;

2. The lower end surface of the avoiding column 2024 is held by the stator rivet head 401, and the avoiding column 2024 moves upward relative to the main body 201 until the first spring 2026 is compressed to the limit position, and the adjusting column 202 is driven by the first spring 2026 and the gland 2025 Move upward relative to the main body 201; when the adjustment post 202 moves upward relative to the main body 201, the part shown at D on the main body 201 pushes the ball 2022 into the groove 2027 through the sliding groove 2021, so that the adjustment post 202 can be relative to the main body 201 Moving upward, at this time, the first spring is in a compressed state, and the first spring 2026 has a tendency to drive the avoiding column 2024 to move downward.

In the above embodiment, the combined downward force generated when the first spring 2026 and the second spring 203 are compressed is much smaller than the ultimate pressure when the stator rivet head 401 is damaged. When the first spring 2026 is compressed, it is only used to drive the avoiding column. 2024 moves downwards. When the second spring 203 is compressed, it is only used to drive the adjustment column 202 downwards; the vertical projection of the avoiding column 2024 can cover part or all of the upper end surface of the stator rivet head 401, on the stator rivet head 401 The upper part of the end surface not covered by the projection is the lower end surface of the main body 201.

In order to facilitate the understanding of the function of the present invention, the process of pressing the stator assembly 400 into the motor housing 300 will be briefly described below.

Press the stator assembly 400 into the motor housing for 300 minutes:

1. Turn the turning frame 1021 over so that the base support plate 1023 is parallel to the horizontal plane, and the pressure-bearing plate 1022 is perpendicular to the horizontal plane;

2. Hoist the motor housing 300 to the base backing plate 1023 by a hoist, and then fix the motor housing 300 to the base backing plate 1023 by bolts;

3. Turn the turning frame 1021 over so that the pressure-bearing plate 1022 is parallel to the horizontal plane and carried on the worktable 102, so that the base backing plate 1023 is perpendicular to the horizontal plane, and the opening of the motor housing 300 is located directly below the mold 200;

4. Sleeve the stator assembly 400 to the opening of the motor housing 300, and drive the die 200 down by the machine head 101. When the upper surface of the stator rivet head 401 bears against the lower surface of the avoiding column 2024, the mold 200 continues to descend, and the avoiding column 2024 Move upward relative to the main body 201 to the second working position, so that the groove 2027 is aligned with the sliding groove 2021, and when the mold 200 continues to move downward, the adjustment column 202 is moved upward relative to the main body 201 to complete the avoidance of the stator rivet head 401 ；

5. The die 200 is driven down by the machine head 101 to press the stator assembly 400 into the motor casing 300 to complete the press-in of the stator assembly;

6. Flip the turning plate 1021 so that the base backing plate 1023 is parallel to the horizontal plane, and the pressure-bearing plate 1022 is perpendicular to the horizontal plane, remove the bolts on the base backing plate 1023 for fixing the motor casing 300, and use a hoist to assemble the stator assembly 400 The rear motor housing 300 is removed.

In the above embodiment, the assembled motors are all relatively large motors, which are difficult to carry manually.

The above embodiments are only to illustrate the technical ideas and features of the present invention, and their purpose is to allow those familiar with the technology to understand the content of the present invention and implement them accordingly, and should not limit the scope of protection of the present invention. All equivalent changes or modifications made by the spirit essence should be covered by the protection scope of the present invention.

Claims

A press-in machine for motor stator components, including a hydraulic machine tool and a mold, is characterized by:

A top plate is fixed on the head of the hydraulic machine tool, and the mold is detachably connected to the lower surface of the top plate. The working table of the hydraulic machine tool has an L-shaped turning frame, and the turning frame has a bearing. The pressure plate and a base backing plate, one side of the pressure-bearing plate and one side of the base backing plate are connected at right angles, and the connection between the pressure-bearing plate and the base backing plate is rotatably connected to one side of the workbench, A jacking cylinder is arranged under the pressure-bearing plate;

The mold includes a main body and an adjustment column;

The outer diameter of the main body is equal to the outer diameter of the stator assembly, the lower end surface of the main body is provided with a plurality of mounting holes uniformly distributed in a ring shape along the center of the lower end surface, and the mounting holes are parallel to the axial direction of the main body. The outer wall of the main body is provided with a matching hole perpendicular to the outer wall and extending to the center of the main body to the mounting hole. The extension line of the axis of the matching hole and the axis of the mounting hole The heart lines are perpendicular and intersect;

The adjusting column is slidably inserted in the mounting hole, the sliding direction of the adjusting column is parallel to the axis line of the mounting hole, and the upper part of the adjusting column is provided with penetrating in the radial direction of the adjusting column. In the sliding groove of the adjusting column, a ball capable of sliding left and right along the sliding groove is arranged in the sliding groove, and the diameter of the ball is larger than the hole diameter of the matching hole. On time, the ball can roll toward the mating hole and be embedded in the mating hole, so that a part of the ball protrudes from the outer circumferential surface of the main body; the middle of the lower end surface of the adjusting column is provided with a penetrating through in the up and down direction The avoiding hole of the adjusting column, the avoiding hole is provided with an avoiding column that can slide up and down, the upper end of the adjusting column is provided with a pressing cover for covering the avoiding hole, the pressing cover and the adjusting column The lower end surface of the gland and the upper end surface of the avoiding column are connected by a first spring, and the outer circumferential surface of the upper part of the avoiding column is provided with a groove for accommodating the ball;

The avoiding column has a first working position and a second working position. When the avoiding column is in the first working position, the lower end surface of the avoiding column is flush with the lower end surface of the adjusting column, and the groove is located Below the center of the ball, the first spring is stretched, and the pulling force generated by the first spring on the avoiding column is equal to the gravity of the avoiding column; when the avoiding column is in the second working position, The avoiding column moves upward, the first spring is compressed, a space for accommodating the stator rivet head is formed between the lower end surface of the avoiding column and the lower end surface of the adjusting column, and the groove is aligned with the sliding groove .
The motor stator assembly pressing machine according to claim 1, wherein the mounting hole is a blind hole.
The motor stator assembly press-in machine according to claim 2, wherein the mold further comprises a second spring, and the second spring is located between the upper end surface of the adjusting column and the bottom wall of the mounting hole .
The motor stator assembly pressing machine according to claim 3, wherein the second spring has a tendency to drive the adjustment column downward.
The motor stator assembly press-in machine according to claim 1, wherein the shortest distance between the adjacent mounting holes is 2 mm.
The motor stator assembly pressing machine according to claim 1, wherein the diameter of the mounting hole is 5-12 mm.
The motor stator assembly press-fitting machine according to claim 1, wherein the main body is a hollow cylinder, the inner diameter of the main body is smaller than the inner diameter of the stator assembly, and the material of the main body is 45# steel.
The motor stator assembly press-in machine according to claim 1, wherein the material of the adjustment column is stainless steel.
The motor stator assembly press-in machine according to claim 1, wherein the mold and the top plate are connected by threaded fitting.
The motor stator assembly press-in machine according to any one of claims 1-9, wherein the upper end of the jacking cylinder is rotatably connected to the lower surface of the pressure-bearing plate, and the jacking cylinder is rotatably connected to the lower surface of the pressure-bearing plate. The lower end is rotatably connected to the ground.
A press-in machine for motor stator components, including a hydraulic machine tool and a mold, is characterized by:

A top plate is fixed on the head of the hydraulic machine tool, and the mold is detachably connected to the lower surface of the top plate. The working table of the hydraulic machine tool has an L-shaped turning frame, and the turning frame has a bearing. The pressure plate and a base backing plate, one side of the pressure-bearing plate and one side of the base backing plate are connected at right angles, and the connection between the pressure-bearing plate and the base backing plate is rotatably connected with one side of the workbench, A jacking cylinder is arranged below the pressure-bearing plate;

The mold includes a main body and an adjustment column;

The outer diameter of the main body is equal to the outer diameter of the stator assembly, and the lower end surface of the main body is provided with a plurality of mounting holes uniformly distributed in a ring shape along the center of the lower end surface, and the mounting holes are parallel to the axial direction of the main body. The outer wall of the main body is provided with a mating hole extending perpendicular to the outer wall to the center of the main body to the mounting hole, and the extension line of the axis of the mating hole and the axis of the mounting hole The heart lines are perpendicular and intersect;

The adjusting column is slidably inserted in the mounting hole, the sliding direction of the adjusting column is parallel to the axis line of the mounting hole, and the upper part of the adjusting column is provided with penetrating in the radial direction of the adjusting column. In the sliding groove of the adjusting column, a ball capable of sliding left and right along the sliding groove is arranged in the sliding groove, and the diameter of the ball is larger than the hole diameter of the matching hole. On time, the ball can roll toward the mating hole and be embedded in the mating hole, so that a part of the ball protrudes from the outer circumferential surface of the main body; the middle of the lower end surface of the adjusting column is provided with a penetrating through in the up and down direction The avoidance hole of the adjustment column, the avoidance hole is provided with an avoidance column that can slide up and down, the upper end of the adjustment column is provided with a gland for covering the avoidance hole, the gland and the adjustment column The lower end surface of the gland and the upper end surface of the avoiding column are connected by a first spring, and the outer circumferential surface of the upper part of the avoiding column is provided with a groove for accommodating the ball;

The avoiding column has a first working position and a second working position. When the avoiding column is in the first working position, the lower end surface of the avoiding column is flush with the lower end surface of the adjusting column, and the groove is located Below the center of the ball, the first spring is stretched, and the pulling force generated by the first spring on the avoiding column is equal to the gravity of the avoiding column; when the avoiding column is in the second working position, The avoiding column moves upward, the first spring is compressed, a space for accommodating the stator rivet head is formed between the lower end surface of the avoiding column and the lower end surface of the adjusting column, and the groove is aligned with the sliding groove ；

The mounting hole is a blind hole;

The mold further includes a second spring located between the upper end surface of the adjustment column and the bottom wall of the mounting hole;

The second spring has a tendency to drive the adjustment column to move downward;

The shortest distance between the adjacent mounting holes is 2mm;

The diameter of the mounting hole is 5-12mm;

The main body is a hollow cylinder, the inner diameter of the main body is smaller than the inner diameter of the stator assembly, and the material of the main body is 45# steel;

The material of the adjustment column is stainless steel;

The mold and the top plate are connected by threaded fitting;

The upper end of the jacking cylinder is rotatably connected to the lower surface of the pressure bearing plate, and the lower end of the jacking cylinder is rotatably connected to the ground.