Stator internal expansion device

Abstract

The utility model discloses a motor internal expansion clamping mechanism, which comprises a base plate, a mandrel, a pulling and pressing mechanism, a sliding mechanism and an expanding and expanding mechanism, the mandrel penetrates through the pulling and pressing mechanism and the sliding mechanism and then is connected with the base plate, the pulling and pressing mechanism and the sliding mechanism are respectively in sliding fit with the mandrel, and the expanding and expanding mechanism is respectively and movably connected with the base plate and the pulling and pressing mechanism. And the sliding mechanism is movably connected with the opening and expanding mechanism. According to the utility model, the stator can be easily shaped, and the shaped stator can be easily taken out of the stator.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, specifically to a stator internal expansion device. Background Technology

[0002] Because the stator is prone to deformation after welding, which can affect subsequent assembly, it is necessary to tighten the stator before proceeding with the motor stator welding line operation.

[0003] The stator shaping fixture currently in use includes a cylinder assembly; a positioning mandrel for positioning the stator, the positioning mandrel passing through the cylinder assembly and having a fixed relative position to the cylinder assembly; a shaping central shaft, which is slidably sleeved on the positioning mandrel between a retracted position and an expanded position and is partially located within the cylinder assembly; and a shaping expansion sleeve, which is sleeved on the shaping central shaft and has a fixed relative position to the positioning mandrel in the axial direction, the shaping central shaft allowing the shaping expansion sleeve to retract inward in the retracted position and expanding the shaping expansion sleeve outward in the expanded position.

[0004] Based on the aforementioned forming fixtures, since the stator has various inner diameter values, different forming fixtures with different inner diameters need to be changed, which is troublesome. Currently, the most common operation method is to use forming expansion sleeves for tightening. Forming expansion sleeves are heavy, difficult to remove, require the production of many forming expansion sleeves of different diameters, and are prone to damaging the stator, affecting product quality, and are also costly. Summary of the Invention

[0005] This invention provides a stator internal expansion device, which not only facilitates stator shaping but also makes it easy to remove the shaped stator from the stator.

[0006] The specific technical solution is as follows:

[0007] A stator internal expansion device includes a chassis, a spindle, a tensioning mechanism, a sliding mechanism, and a spreading expansion mechanism. The spindle passes through the tensioning mechanism and the sliding mechanism and is connected to the chassis. The tensioning mechanism and the sliding mechanism are slidably engaged with the spindle. The spreading expansion mechanism is movably connected to the chassis and the tensioning mechanism, and the sliding mechanism is movably connected to the spreading expansion mechanism.

[0008] Furthermore, the chassis includes a chassis body and a first hinge seat. The first hinge seat is fixed to the chassis body, and the expansion and tensioning mechanism is movably connected to the first hinge seat. The chassis body is provided with a first mounting hole, and the spindle cooperates with the first mounting hole.

[0009] Furthermore, the tensioning mechanism includes a first slide, a second hinge seat, and a connecting part. The first slide has a first through hole through which the spindle passes. The second hinge seat is fixed to the first slide, the connecting part is fixed to the first slide, and the tensioning mechanism is hinged to the second hinge seat.

[0010] Furthermore, the sliding mechanism includes a second slide and a third hinge seat. The second slide has a second through hole through which the spindle passes. The third hinge seat is fixed to the second slide and the expansion and tightening mechanism is hinged to the third hinge seat.

[0011] Furthermore, the expansion and tensioning mechanism includes an expansion block, a first link, a second link, and a third link. The first link, the second link, and the third link are movably connected to the expansion block, the first link is also movably connected to the chassis, the second link is also movably connected to the tensioning mechanism, and the third link is also movably connected to the sliding mechanism.

[0012] Furthermore, the expansion block includes a support body and a spring pad, with the spring pad fixed to the support body.

[0013] 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 extend into the groove and are hinged to the support body.

[0014] In this invention, the device adopts a center-aligned, adjustable tensioning structure. By pulling the tensioning mechanism to change the angle of the connecting rod, the diameter of the tensioning mechanism can be changed, thereby achieving the purpose of tightening the stator and preventing the stator from deforming. During this process, since the outer diameter of the tensioning device of this invention can be adjusted, it can be adapted to different models of stators. Furthermore, the tensioning mechanism is equipped with spring pads, which will not damage the stator and ensure the quality of subsequent motor assembly. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the internal expansion device of the stator.

[0016] Figure 2 This is a cross-sectional view of the internal expansion device of the stator.

[0017] Labels in the attached diagram:

[0018] Chassis 1, chassis body 1a, first hinge seat 1b, first mounting hole 1c, spindle 2, first slide 3, first through hole 3a, second hinge seat 4, connecting part 5, second slide 6, second through hole 6a, third hinge seat 7, expansion block 8, support body 8a, spring pad 8b, first connecting rod 9, second connecting rod 10, third connecting rod 11, hanging ring 12. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, the present invention provides a stator internal expansion and tightening device, including a base 1, a spindle 2, a tensioning mechanism, a sliding mechanism, and a spreading and tightening mechanism. The spindle 2 passes through the tensioning mechanism and the sliding mechanism and is connected to the base 1. The tensioning mechanism and the sliding mechanism are slidably engaged with the spindle 2, respectively. The spreading and tightening mechanism is movably connected to the base 1 and the tensioning mechanism, and the sliding mechanism is movably connected to the spreading and tightening mechanism.

[0021] 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, and the expansion and tensioning mechanism is movably connected to the first hinge seat 1b. The chassis body 1a has a first mounting hole 1c, and the spindle 2 mates with the first mounting hole 1c. The spindle 2 and the first mounting hole 1c can be an interference fit, or they can be a clearance fit and then welded together. A hanging ring 12 is fixed to the end of the spindle 2, which facilitates the movement of the entire internal tensioning device of the stator. For example, a rope-like or hook-like component can be connected to the hanging ring 12, and a trolley or other lifting device can be used to apply tension to the hanging ring, thereby moving the entire internal tensioning device of the stator.

[0022] The tension / compression mechanism includes a first slide 3, a second hinge seat 4, and a connecting part 5. The first slide 3 has a first through hole 3a through which the mandrel 2 passes. The second hinge seat 4 is fixed to the first slide 3, and the connecting part 5 is also fixed to the first slide 3. A tensioning mechanism is hinged to the second hinge seat 4. The connecting part 5 is an annular component, and there are two annular components. The annular components are fixed to the first slide 3 by welding. Applying tension or pressure to the connecting part 5 allows the tension / compression mechanism to move along the axial direction of the mandrel 2.

[0023] The sliding mechanism includes a second slide 6 and a third hinge seat 7. The second slide 6 is provided with a second through hole 6a, through which the spindle 2 passes. The third hinge seat 7 is fixed to the second slide 6, and the expansion and tightening mechanism is hinged to the third hinge seat 7.

[0024] The expansion and tensioning 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 movably connected to the expansion block 8. The first connecting rod 9 is hinged to one end of the expansion block 8 and is also movably hinged to the chassis 1. The second connecting rod 10 is hinged to the middle of the expansion block 8 and is also connected to the tensioning mechanism. The third connecting rod 11 is hinged to the other end of the expansion block 8 and is also movably hinged to the sliding mechanism. In this invention, there are three expansion blocks 8, which are distributed around the mandrel 2 at 120-degree intervals. There are three first connecting rods 9, the second connecting rod 10, and the third connecting rod 11.

[0025] The expansion block 8 includes a support body 8a and a spring pad 8b, with the spring pad 8b fixed to the support body 8a. The support body 8a has 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 hinged to the support body 8a. The spring pad 8b has a hole 8d; when the spring pad 8b deforms under compressive force, the hole 8d can absorb these deformations, thereby reducing the pressure on the stator caused by the deformation.

[0026] The process of stator expansion and tightening in this invention is as follows:

[0027] S1, the actuator (which can be a cylinder or hydraulic cylinder, etc.) applies an upward pulling force to the connecting part 5 on the first slide block 3, causing the tensioning mechanism to move upward along the axial direction of the spindle 2 (from... Figure 2 (From the middle view), the third connecting rod 11 drives the expansion block 8 to move, the first connecting rod 9 and the second connecting rod 10 swing accordingly, and the second slide 6 moves upward along the axis of the spindle 2 (from Figure 2 (From the middle view), so that multiple expansion blocks 8 move closer to the spindle 2, thereby reducing the diameter of the outer circumference of multiple expansion blocks 8.

[0028] S2, in the state where the diameter of the outer circumference of the expansion block 8 is reduced in S1, one end of the inner tightening 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. The driver (the driver can be a component such as a pneumatic cylinder or a hydraulic cylinder) applies an upward pulling force to the connecting part 5 on the first slide block 3, causing the tensioning mechanism to move downward along the axial direction of the spindle 2 (from... Figure 2 (From the middle view), the expansion block 8 is driven to move by the third connecting rod 11, and the first connecting rod 9 and the second connecting rod 10 swing accordingly. The second slide 6 moves downward along the axis of the spindle 2 (from Figure 2 (See the middle), so that the multiple expansion blocks 8 gradually move away from the mandrel 2, thereby increasing the diameter of the outer circumferential surface of the multiple expansion blocks 8, and finally the outer circumferential surface of the expansion blocks 8 forms abutment with the inner circumferential surface of the stator, and the expansion blocks 8 form an expansion and tightening effect on the stator.

[0029] S3, based on the stator tightening in S2, after the stator undergoes necessary processing, such as shaping, an upward pulling force is applied to the connecting part 5 and the first slide 3 by a driver (the driver can be a pneumatic cylinder or hydraulic cylinder, etc.), causing the tensioning mechanism to move upward along the axial direction of the spindle 2 (from...). Figure 2 (From the middle view), the third connecting rod 11 drives the expansion block 8 to move, the first connecting rod 9 and the second connecting rod 10 swing accordingly, and the second slide 6 moves upward along the axis of the spindle 2 (from Figure 2 (See the middle), thereby bringing multiple expansion blocks 8 closer to the spindle 2, thereby reducing the diameter of the outer circumferential surface of the multiple expansion blocks 8, so as to release the expansion operation on the stator and remove the internal expansion device of the stator from the inner hole of the stator.

Claims

1. A stator internal expansion device characterized by, The utility model relates to a kind of core shafts, it include chassis (1), core shaft (2), pull and press mechanism, sliding mechanism, prop open and expand mechanism, core shaft (2) passes through pull and press mechanism and sliding mechanism and is connected with chassis (1), pull and press mechanism and sliding mechanism are respectively with core shaft (2) sliding fit, prop open and expand mechanism is respectively chassis (1) with and pull and press mechanism movably connected, sliding mechanism is movably connected with prop open and expand mechanism.

2. A stator internal expansion device according to claim 1, wherein Chassis (1) includes chassis body (1a), first hinged seat (1b), first hinged seat (1b) is fixed with chassis body (1a), prop open and expand mechanism is movably connected with first hinged seat (1b), first mounting hole (1c) is equipped on chassis body (1a), core shaft (2) is matched with first mounting hole (1c).

3. A stator internal expansion device according to claim 1, wherein The pull and press mechanism includes first sliding seat (3), second hinged seat (4), connecting portion (5), first sliding seat (3) is equipped with first through-hole (3a), core shaft (2) passes through first through-hole (3a), second hinged seat (4) is fixed with first sliding seat (3), connecting portion (5) is fixed with first sliding seat (3), prop open and expand mechanism is hinged with second hinged seat (4).

4. A stator internal expansion device according to claim 1, wherein The sliding mechanism includes second sliding seat (6), third hinged seat (7), second sliding seat (6) is equipped with second through-hole (6a), core shaft (2) passes through second through-hole (6a), third hinged seat (7) is fixed with second sliding seat (6), prop open and expand mechanism is hinged with third hinged seat (7).

5. A stator internal expansion device according to claim 1, wherein Prop open and expand mechanism includes expansion block (8), first connecting rod (9), second connecting rod (10), third connecting rod (11), first connecting rod (9), second connecting rod (10), third connecting rod (11) are movably connected with expansion block (8), first connecting rod (9) is also movably connected with chassis (1), second connecting rod (10) is also movably connected with pull and press mechanism, third connecting rod (11) is also movably connected with sliding mechanism.

6. A stator internal expansion device according to claim 5, wherein Expansion block (8) includes support body (8a), elastic pad (8b), elastic pad (8b) is fixed with support body (8a).

7. A stator internal expansion device according to claim 6, wherein The support body (8a) is equipped with recess (8c), and the end of first connecting rod (9), second connecting rod (10) and third connecting rod (11) extends into recess (8c) and is hinged with support body (8a).

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