Stator internal expansion device

Abstract

A stator internal expansion device disclosed by the present invention comprises a chassis, a core shaft, a pulling and pressing mechanism, a sliding mechanism and an opening expansion mechanism, the core shaft passes through the pulling and pressing mechanism and the sliding mechanism and then is connected with the chassis, the pulling and pressing mechanism and the sliding mechanism are respectively in sliding fit with the core shaft, and the opening expansion mechanism is respectively and movably connected with the chassis and the pulling and pressing mechanism. And the sliding mechanism is movably connected with the opening and expanding mechanism. According to the invention, the stator can be easily shaped, and the shaped stator can be easily taken out of the stator.

Description

Technical Field

[0001] The invention relates to the field of motor production and manufacturing, and in particular to a stator internal expansion device. Background Art

[0002] Since the stator is easily deformed after welding, which affects the subsequent assembly, the stator needs to be expanded and tightened before the motor stator welding operation can be carried out.

[0003] The stator shaping tool currently in use includes a cylinder assembly; a positioning mandrel for positioning the stator, the positioning mandrel being inserted through the cylinder assembly and fixed in relative position with the cylinder assembly; a shaping center shaft, the shaping center shaft being slidably sleeved on the positioning mandrel between a recovery position and an expansion position and being partially located in the cylinder assembly; a shaping expansion sleeve, the shaping expansion sleeve being sleeved on the shaping center shaft and fixed in relative position with the positioning mandrel in the axial direction of the positioning mandrel, the shaping center shaft allowing the shaping expansion sleeve to be retracted inwardly when in the recovery position and expanding the shaping expansion sleeve outwardly when in the expansion position.

[0004] Based on the above shaping tooling, since the stator has a variety of inner diameter values, it is necessary to replace shaping tools with different inner diameters, which is troublesome to switch. At present, a large number of operating methods are to use shaping expansion sleeves for expansion, which are heavy and difficult to remove. In addition, many shaping expansion sleeves with different diameters need to be made, which are easy to damage the stator, affect product quality, and are costly. Summary of the invention

[0005] The invention provides a stator internal expansion device, which is not only easy to shape the stator, but also easy to take out from the stator after the shaping process.

[0006] The specific technical solutions are as follows: A stator internal expansion device comprises a chassis, a core shaft, a tensioning and pressing mechanism, a sliding mechanism, and an expansion and tightening mechanism. The core shaft passes through the tensioning and pressing mechanism and the sliding mechanism and is connected to the chassis. The tensioning and pressing mechanism and the sliding mechanism are respectively slidably matched with the core shaft. The expansion and tightening mechanism is movably connected to the chassis and the tensioning and pressing mechanism, and the sliding mechanism is movably connected to the expansion and tightening mechanism.

[0007] Furthermore, the chassis includes a chassis body and a first hinge seat, the first hinge seat is fixed to the chassis body, the expansion mechanism is movably connected to the first hinge seat, the chassis body is provided with a first mounting hole, and the core shaft cooperates with the first mounting hole.

[0008] Furthermore, the pulling and pressing mechanism includes a first slide seat, a second hinge seat, and a connecting part. The first slide seat is provided with a first through hole, the core shaft passes through the first through hole, the second hinge seat is fixed to the first slide seat, the connecting part is fixed to the first slide seat, and the expansion mechanism is hinged to the second hinge seat.

[0009] Furthermore, the sliding mechanism includes a second sliding seat and a third hinge seat. The second sliding seat is provided with a second through hole. The core shaft passes through the second through hole. The third hinge seat is fixed to the second sliding seat. The expansion mechanism is hinged to the third hinge seat.

[0010] Furthermore, the expansion and tightening mechanism includes an expansion block, a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod, the second connecting rod, and the third connecting rod are respectively movably connected to the expansion block, the first connecting rod is also movably connected to the chassis, the second connecting rod is also movably connected to the tension and compression mechanism, and the third connecting rod is also movably connected to the sliding mechanism.

[0011] Furthermore, the expansion block includes a support body and a spring washer, and the spring washer is fixed to the support body.

[0012] Furthermore, the support body is provided with a groove, and the ends of the first connecting rod, the second connecting rod and the third connecting rod are extended into the groove and then hinged to the support body.

[0013] In the present invention, the device adopts a center-aligned expansion size adjustable structure, and can change the angle of the connecting rod by pulling the tension and pressure mechanism to change the diameter of the expansion mechanism, so as to achieve the purpose of expanding the stator and make the stator less likely to deform. In this process, since the outer diameter of the expansion device of the present invention can be adjusted, it can be adapted to stators of different models, and a spring washer is installed on the expansion mechanism, which will not damage the stator and ensure the subsequent motor assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the stator internal expansion device.

[0015] Figure 2 It is a cross-sectional view of the expansion device inside the stator.

[0016] Markings in the attached drawings: Chassis 1, chassis body 1a, first articulated seat 1b, first mounting hole 1c, core shaft 2, first slide seat 3, first through hole 3a, second articulated seat 4, connecting part 5, second slide seat 6, second through hole 6a, third articulated seat 7, expansion block 8, support body 8a, spring washer 8b, first connecting rod 9, second connecting rod 10, third connecting rod 11, hanging ring 12. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1 and Figure 2As shown, a stator internal expansion device of the present invention comprises a chassis 1, a core shaft 2, a tensioning and pressing mechanism, a sliding mechanism, and an expansion and tightening mechanism. The core shaft 2 is connected to the chassis 1 after passing through the tensioning and pressing mechanism and the sliding mechanism. The tensioning and pressing mechanism and the sliding mechanism are respectively slidably matched with the core shaft 2. The expansion and tightening mechanism is movably connected to the chassis 1 and the tensioning and pressing mechanism, and the sliding mechanism is movably connected to the expansion and tightening mechanism.

[0019] The chassis 1 includes a chassis body 1a and a first hinge seat 1b. The first hinge seat 1b is fixed to the chassis body 1a. The expansion mechanism is movably connected to the first hinge seat 1b. The chassis body 1a is provided with a first mounting hole 1c, and the mandrel 2 is matched with the first mounting hole 1c. The mandrel 2 and the first mounting hole 1c can be interference fit, or the mandrel 2 and the first mounting hole 1c can be gap fit and then fixed by welding. A hanging ring 12 is fixed at the end of the mandrel 2, and the hanging ring 12 is used to facilitate the movement of the entire stator internal expansion device. For example, a rope-shaped or hook-shaped component is connected to the hanging ring 12, and a pulling force is applied to the hanging ring by a crane or other lifting device to move the entire stator internal expansion device.

[0020] The tension and compression mechanism comprises a first slide seat 3, a second hinge seat 4, and a connecting portion 5. The first slide seat 3 is provided with a first through hole 3a, the mandrel 2 passes through the first through hole 3a, the second hinge seat 4 is fixed to the first slide seat 3, the connecting portion 5 is fixed to the first slide seat 3, and the expansion mechanism is hinged to the second hinge seat 4. The connecting portion 5 is an annular component, there are two annular components, and the annular components are fixed to the first slide seat 3 by welding. Applying tension or pressure to the connecting portion 5 can make the tension and compression mechanism move along the axial direction of the mandrel 2.

[0021] The sliding mechanism comprises a second sliding seat 6 and a third hinge seat 7 . The second sliding seat 6 is provided with a second through hole 6 a . The core shaft 2 passes through the second through hole 6 a . The third hinge seat 7 is fixed to the second sliding seat 6 . The expansion mechanism is hinged to the third hinge seat 7 .

[0022] The expansion and tightening mechanism includes an expansion block 8, a first connecting rod 9, a second connecting rod 10, and a third connecting rod 11. The first connecting rod 9, the second connecting rod 10, and the third connecting rod 11 are respectively movably connected to the expansion block 8. The first connecting rod 9 is hinged to one end of the expansion block 8, and the first connecting rod 9 is also movably hinged to the chassis 1. The second connecting rod 10 is hinged to the middle of the expansion block 8, and the second connecting rod 10 is also connected to the tension and compression mechanism. The third connecting rod 11 is hinged to the other end of the expansion block 8, and the third connecting rod 11 is also movably hinged to the sliding mechanism. In the present invention, the number of expansion blocks 8 is three, and the three expansion blocks 8 are distributed around the core shaft 2 at an interval of 120 degrees. The first connecting rod 9, the second connecting rod 10, and the third connecting rod 11 are all three.

[0023] The expansion block 8 includes a support body 8a and a spring washer 8b, and the spring washer 8b is fixed to the support body 8a. The support body 8a is provided with a groove 8c, and the ends of the first connecting rod 9, the second connecting rod 10, and the third connecting rod 11 are inserted into the groove 8c and then hinged with the support body 8a. The spring washer 8b is provided with a hole 8d, and when the spring washer 8b is deformed by the extrusion force, the deformation can be received by the hole 8d to reduce the extrusion of the stator caused by the deformation.

[0024] The process of stator expansion and tightening of the present invention is as follows: S1, through the driver (the driver can be a cylinder or hydraulic cylinder and other components) the connecting part 5 applies an upward pulling force to the first slide 3, so that the tension and compression mechanism moves upward along the axial direction of the core shaft 2 (from Figure 2 The third connecting rod 11 drives the expansion block 8 to move, and the first connecting rod 9 and the second connecting rod 10 swing accordingly, and the second slide seat 6 moves upward along the axial direction of the core shaft 2 (from Figure 2 ), so that the multiple expansion blocks 8 are brought closer to the core shaft 2, thereby reducing the diameter of the outer circumferential surface of the multiple expansion blocks 8.

[0025] S2, in the state where the diameter of the outer circumferential surface of the expansion block 8 in S1 is reduced, one end of the internal expansion device is passed through the inner hole of the stator, so that at least a part of the expansion block 8 is located in the inner hole of the stator, and an upward pulling force is applied to the first slide seat 3 by the connecting part 5 through the driver (the driver can be a cylinder or a hydraulic cylinder, etc.), so that the tension and compression mechanism moves downward along the axial direction of the core shaft 2 (from Figure 2 The third connecting rod 11 drives the expansion block 8 to move, and the first connecting rod 9 and the second connecting rod 10 swing accordingly, and the second slide seat 6 moves downward along the axial direction of the core shaft 2 (from Figure 2 The plurality of expansion blocks 8 are gradually moved away from the core shaft 2, thereby increasing the diameter of the outer circumferential surfaces of the plurality of expansion blocks 8. Finally, the outer circumferential surfaces of the expansion blocks 8 abut against the inner circumferential surface of the stator, and the expansion blocks 8 exert a tightening effect on the stator.

[0026] S3, after the stator is tightened in S2, the stator is subjected to necessary processing, such as shaping processing, and an upward pulling force is applied to the first slide 3 by the connecting portion 5 through a driver (the driver can be a cylinder or a hydraulic cylinder, etc.), so that the tension and compression mechanism moves upward along the axial direction of the core shaft 2 (from Figure 2 The third connecting rod 11 drives the expansion block 8 to move, and the first connecting rod 9 and the second connecting rod 10 swing accordingly, and the second slide seat 6 moves upward along the axial direction of the core shaft 2 (from Figure 2 (see Figure 3) so that the multiple expansion blocks 8 are brought closer to the core shaft 2, thereby reducing the diameter of the outer circumferential surface of the multiple expansion blocks 8 to release the expansion operation of the stator and withdraw the stator internal expansion device from the inner hole of the stator.

Claims

1. A stator internal expansion device, characterized in that: The invention comprises a chassis (1), a core shaft (2), a tensioning and pressing mechanism, a sliding mechanism, and an expansion and tightening mechanism. The core shaft (2) passes through the tensioning and pressing mechanism and the sliding mechanism and is connected to the chassis (1). The tensioning and pressing mechanism and the sliding mechanism are respectively slidably matched with the core shaft (2). The expansion and tightening mechanism is movably connected between the chassis (1) and the tensioning and pressing mechanism, and the sliding mechanism is movably connected to the expansion and tightening mechanism.

2. A stator internal expansion device according to claim 1, characterized in that: The chassis (1) comprises a chassis body (1a) and a first hinge seat (1b); the first hinge seat (1b) is fixed to the chassis body (1a); the expansion and tightening mechanism is movably connected to the first hinge seat (1b); a first mounting hole (1c) is provided on the chassis body (1a); and the core shaft (2) cooperates with the first mounting hole (1c).

3. A stator internal expansion device according to claim 1, characterized in that: The tensioning and pressing mechanism comprises a first slide seat (3), a second hinge seat (4), and a connecting portion (5); the first slide seat (3) is provided with a first through hole (3a), the core shaft (2) passes through the first through hole (3a), the second hinge seat (4) is fixed to the first slide seat (3), the connecting portion (5) is fixed to the first slide seat (3), and the expansion mechanism is hinged to the second hinge seat (4).

4. A stator internal expansion device according to claim 1, characterized in that: The sliding mechanism comprises a second sliding seat (6) and a third hinge seat (7); the second sliding seat (6) is provided with a second through hole (6a); the core shaft (2) passes through the second through hole (6a); the third hinge seat (7) is fixed to the second sliding seat (6); and the expansion mechanism is hingedly connected to the third hinge seat (7).

5. The stator internal expansion device according to claim 1, characterized in that: The expansion and tightening mechanism comprises an expansion block (8), a first connecting rod (9), a second connecting rod (10), and a third connecting rod (11). The first connecting rod (9), the second connecting rod (10), and the third connecting rod (11) are respectively movably connected to the expansion block (8), the first connecting rod (9) is also movably connected to the chassis (1), the second connecting rod (10) is also movably connected to the tension and compression mechanism, and the third connecting rod (11) is also movably connected to the sliding mechanism.

6. A stator internal expansion device according to claim 5, characterized in that: The expansion block (8) comprises a support body (8a) and a spring washer (8b), wherein the spring washer (8b) is fixed to the support body (8a).

7. A stator internal expansion device according to claim 6, characterized in that: The support body (8a) is provided with a groove (8c), and the ends of the first connecting rod (9), the second connecting rod (10), and the third connecting rod (11) extend into the groove (8c) and are hingedly connected to the support body (8a).

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