Inner support clamp suitable for clamping stator

Abstract

An inner support clamp suitable for clamping a stator comprises a base block, a driving air cylinder arranged on one side of the base block, an inner expansion core arranged at the output end of the driving air cylinder, at least four expansion blocks and at least two rubber rings arranged at the two ends of the expansion blocks in a sleeving mode respectively. A long hole is formed in the expansion sleeve in the axial direction of the base, and the inner expansion core is movably arranged in the long hole in a penetrating mode. According to the internal support clamp suitable for clamping the stator, the four expansion blocks are synchronously expanded outwards by stretching out and drawing back the internal expansion core with the conical side walls, so that internal expansion motion is completed, and the functions of internally supporting the stator and enhancing the positioning effect are achieved. And the rubber ring can quickly reset the four expansion blocks after the pressure of the driving cylinder is released. The side walls of the four inner supporting parts are attached to the inner wall of the stator, so that the circle center of the stator is consistent with the circle center of the inner supporting clamp suitable for clamping the stator, the stator is fixed, and the positioning effect of the clamp is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping fixtures, in particular to an inner support fixture suitable for clamping a stator. Background Art

[0002] At present, with the development and progress of science and technology, automated production is more and more applied in the field of machining. In the manufacturing of coils, it is necessary to clamp the stator in order to process or wind coils on its circumferential outer side wall. For example, Chinese Patent CN202120031672.4 discloses a stator fixture, which includes: a main shaft, a fixed mounting ring is arranged on the annular surface at one end of the main shaft, a plurality of first support plates are rotatably connected to the annular surface of the fixed mounting ring, a movable mounting ring is sleeved on the main shaft, and a plurality of second support plates are rotatably connected to the annular surface of the movable mounting ring, and the first support plate intersects and is rotatably connected to the corresponding second support plate; a clamping plate is rotatably installed at the suspended end of each first support plate, and a driving component for driving the movable mounting ring to slide on the main shaft is installed on the main shaft. Although this inner support fixture can clamp the stator, the clamping plate has no limit in the axial direction of the main shaft, so the angle of the clamping plate may shift, thus affecting the clamping and positioning effect. Summary of the Utility Model

[0003] In view of this, the utility model provides an inner support fixture suitable for clamping a stator to solve the above problems.

[0004] An inner support fixture suitable for clamping a stator includes a base block, a driving cylinder arranged on one side of the base block, an inner expansion core arranged at the output end of the driving cylinder, at least four expansion blocks inserted into the base block at intervals, and at least two rubber rings sleeved on both ends of the expansion blocks respectively. The base block includes a base, a sleeve fixed on one side of the base, and a top cover fixed on one side of the sleeve. The sleeve is provided with a long hole along the axial position of the base, and the inner expansion core movably passes through the long hole. At least four expansion gaps are spaced apart on the circumferential outer side wall of the sleeve, the four expansion gaps are respectively connected to the long hole, and the expansion blocks are inserted into the four expansion gaps. The inner expansion core is arranged in a frustum shape, and the diameter of the end of the inner expansion core far from the driving cylinder gradually becomes larger towards the other end. The side surface of the expansion block facing the long hole is inclined, and the inner diameter of the inner hole formed by the four expansion blocks near the base gradually becomes smaller towards the top cover. The side of the expansion block far from the long hole has an inner support portion, and the side wall of the inner support portion is in an outwardly convex arc shape.

[0005] Furthermore, the base is in a disc shape, and a through hole for passing through the output end of the driving cylinder is opened at the center position thereof.

[0006] Furthermore, the connection between the base and the expansion sleeve is recessed to form a first gap for providing space for the rubber ring to expand.

[0007] Furthermore, a second gap for providing space for the rubber ring to expand is formed at one end of the expansion sleeve away from the base, and the second gap is annular.

[0008] Furthermore, the top cover is arranged at one end of the expansion sleeve away from the base, and the top cover covers the expansion block.

[0009] Furthermore, the output direction of the driving cylinder is located on the axis of the long hole.

[0010] Furthermore, circular grooves for placing the rubber ring are respectively arranged at two ends of the side of the expansion block facing the inner support part.

[0011] Compared with the prior art, the inner support fixture for clamping a stator provided by the present utility model synchronously expands four expansion blocks outward by telescoping the inner expansion core with a tapered side wall, thereby completing the inner expansion movement to achieve the function of inner supporting the stator and strengthening the positioning effect. The two rubber rings arranged at the ends of the expansion blocks can quickly reset the four expansion blocks after the driving cylinder releases pressure, thereby achieving the purpose of quickly releasing the stator. The side walls of the four inner support parts are attached to the inner wall of the stator, so as to ensure that the center of the stator is consistent with the center of the inner support fixture for clamping the stator, thereby completing the fixation of the stator and strengthening the positioning effect of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the inner support fixture for clamping a stator provided by the present utility model.

[0013] Figure 2 is Figure 1 an exploded schematic diagram of the inner support fixture for clamping a stator.

[0014] Figure 3 is Figure 1 a schematic structural diagram of the base and the expansion sleeve of the inner support fixture for clamping a stator.

[0015] Figure 4 is Figure 1 a schematic structural diagram of the expansion block of the inner support fixture for clamping a stator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further details the specific embodiments of the present utility model. It should be understood that the description of the embodiments of the present utility model herein is not intended to limit the protection scope of the present utility model.

[0017] As shown Figure 1 in the figure, it is a schematic structural diagram of an inner support fixture provided by the present utility model for clamping a stator. The inner support fixture for clamping a stator includes a base block 10, a driving cylinder 20 disposed on one side of the base block 10, an inner expansion core 30 disposed at the output end of the driving cylinder 20, at least four expansion blocks 40 inserted into the base block 10 at intervals, and at least two rubber rings 50 sleeved on both ends of the expansion blocks 40 respectively. It can be imagined that the inner support fixture for clamping a stator further includes some other functional modules, such as a power supply module, a gas supply module, etc., which are well-known technologies to those skilled in the art and will not be elaborated here one by one.

[0018] Please refer to Figures 2 to 4 together. The base block 10 includes a base 11, a sleeve 12 fixedly disposed on one side of the base 11, and a top cover 13 fixedly disposed on one side of the sleeve 12.

[0019] The base 11 is in a disc shape, and a through hole for passing through the output end of the driving cylinder 20 is provided at the center position thereof. The connection between the base 11 and the sleeve 12 is recessed to form a first gap 14, and this first gap 14 provides space for the rubber ring 50 to expand.

[0020] The sleeve 12 is provided with a long hole 15 along the axial position of the base 11, and the inner expansion core 30 movably passes through the long hole 15. At least four expansion gaps 16 are spaced apart on the circumferential outer wall of the sleeve 12, the four expansion gaps 16 are respectively connected to the long hole 15, and the expansion blocks 40 are inserted into the four expansion gaps 16. In this way, the four expansion blocks 40 expand outward under the extrusion of the inner expansion core 30, thereby completing the inner expansion movement to achieve the function of inner supporting the stator, and the specific extrusion process will be described below.

[0021] A second gap 17 is provided at one end of the sleeve 12 away from the base 11, and the second gap 17 is in a circular ring shape, which is used to provide space for the rubber ring 50 to expand.

[0022] The top cover 13 is disposed at one end of the sleeve 12 away from the base 11, and the top cover 13 covers the sleeve 12 and the expansion blocks 40, thereby restricting the expansion blocks 40 in the axial direction along the top cover 13 to prevent them from falling off the sleeve 12.

[0023] The output direction of the driving cylinder 20 is located on the axis of the long hole 15, and the driving cylinder 20 can drive the inner expansion core 30 to make reciprocating movements in the long hole 15.

[0024] The inner expansion core 30 is arranged in a frustum shape, and the diameter of the end of the inner expansion core 30 away from the driving cylinder 20 gradually increases towards the other end. The side surface of the expansion block 40 facing the long hole 15 is inclined, and the inner diameter of the inner hole formed by the four expansion blocks 40 gradually decreases towards the top cover 13 on the side close to the base 11. Thus, when the driving cylinder 20 drives the inner expansion core 30 to move towards the top cover 13, the conical side wall of the inner expansion core 30 abuts against the side walls of the four expansion blocks 40, and the inner expansion core 30 will gradually push the four expansion blocks 40 outwards, thereby completing the inner expansion movement and achieving the function of internally supporting the stator.

[0025] One inner support portion 41 is provided on the side of the expansion block 40 away from the long hole 15, and the side wall of the inner support portion 41 is in an outwardly convex arc shape to fit the inner wall of the inner hole of the stator. During the process of internally supporting the stator, the outward expansion degrees of the four inner support portions 41 are the same, so that the center of the stator can be ensured to be consistent with the center of the inner support fixture suitable for clamping the stator, thereby completing the fixation of the stator and strengthening the positioning effect of the fixture. Two circular grooves 42 are respectively provided at two end portions of the side of the expansion block 40 facing the inner support portion 41, and the ring formed by the four circular grooves 42 is used to place the rubber ring 50. Thus, when the four expansion blocks 40 are pushed outwards by the inner expansion core 30, the two rubber rings 50 will gradually expand. After the driving cylinder 20 releases pressure, the rubber ring 50 releases its deformation and contracts inwards, thereby causing the four expansion blocks 40 to approach each other and quickly return to the initial position to wait for the next inner support operation.

[0026] Compared with the prior art, the inner support fixture suitable for clamping the stator provided by the present utility model synchronously expands the four expansion blocks 40 outwards by telescoping the inner expansion core 30 with a conical side wall, thereby completing the inner expansion movement to achieve the functions of internally supporting the stator and strengthening the positioning effect. The two rubber rings 50 provided at the ends of the expansion block 40 can quickly reset the four expansion blocks 40 after the driving cylinder 20 releases pressure, thereby achieving the purpose of quickly releasing the stator. The side walls of the four inner support portions 41 fit the inner wall of the stator, so that the center of the stator is ensured to be consistent with the center of the inner support fixture suitable for clamping the stator, thereby completing the fixation of the stator and strengthening the positioning effect of the fixture.

[0027] The above is only the preferred embodiment of the present utility model, and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement or improvement within the spirit of the present utility model is covered within the scope of the claims of the present utility model.

Claims

1. An internal support fixture applicable to clamping a stator, characterized in that: The inner support fixture applicable to clamping the stator includes a base block, a driving cylinder disposed on one side of the base block, an inner expansion core disposed at the output end of the driving cylinder, at least four expansion blocks inserted into the base block at intervals, and at least two rubber rings respectively sleeved at both ends of the expansion blocks. The base block includes a base, a sleeve fixedly disposed on one side of the base, and a top cover fixedly disposed on one side of the sleeve. The sleeve is provided with a long hole along the axial position of the base, and the inner expansion core movably passes through the long hole. At least four expansion gaps are spaced apart on the circumferential outer wall of the sleeve, and the four expansion gaps are respectively connected to the long hole, and the expansion blocks are inserted into the four expansion gaps. The inner expansion core is arranged in a frustum shape, and the diameter of the end of the inner expansion core away from the driving cylinder gradually increases towards the other end. The side surface of the expansion block facing the long hole is inclined. The inner diameter of the inner hole formed by the four expansion blocks near the base gradually decreases towards the top cover. The side of the expansion block away from the long hole has an inner support portion, and the side wall of the inner support portion is in an outwardly convex arc shape.

2. The inner support fixture applicable to clamping the stator according to claim 1, wherein: The base is in a disc shape, and a perforation for passing through the output end of the driving cylinder is provided at the center position thereof.

3. The internal support fixture applicable to clamping a stator according to claim 1, wherein: The connection portion between the base and the sleeve is recessed to form a first gap for providing space for the rubber ring after it is expanded.

4. The inner support fixture applicable to clamping a stator according to claim 1, wherein: A second gap for providing space for the rubber ring after it is expanded is provided at the end of the sleeve away from the base, and the second gap is in a circular ring shape.

5. The inner support fixture applicable to clamping a stator according to claim 1, wherein: The top cover is disposed at the end of the sleeve away from the base, and the top cover covers the expansion blocks.

6. The inner support fixture applicable to clamping a stator according to claim 1, characterized in that: The output direction of the driving cylinder is located on the axis of the long hole.

7. The internal support fixture applicable to clamping a stator according to claim 1, characterized in that: A circular groove for placing the rubber ring is respectively provided at both ends of the side of the expansion block facing the inner support portion.

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