Modularized self-locking device for high-concentricity processing of stator

Abstract

The utility model discloses a modularized self-locking device for high concentricity processing of a stator, which comprises a support core part provided with two first conical surfaces, and the first conical surfaces are arranged at intervals; the two expansion pieces are arranged on the supporting core part in a sleeving mode and make contact with the first conical surfaces one to one; the two replaceable contact pieces are connected to the outer wall of the expansion piece in a one-to-one mode, move along with the expansion piece and make contact with and support the inner hole in the stator from inside to outside; the at least two locking pieces are arranged on the expansion pieces in a one-to-one penetrating manner and are connected with the supporting core part; the at least two loosening pieces are connected to the expansion pieces in a one-to-one mode, the loosening pieces and the locking pieces are arranged at intervals, and when the loosening pieces move on the expansion pieces, the loosening pieces abut against the supporting core part and are in linkage with the expansion pieces to move in the direction away from the middle position of the supporting core part; therefore, the technical problems that the positioning precision is relatively poor, the machining precision is relatively poor, the modularization degree is low, operation is inconvenient, and the machining efficiency is relatively low are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of positioning devices for machining mechanical parts, specifically a modular self-locking device for machining stators with high concentricity. Background Technology

[0002] In the stator machining of high-precision spindle equipment, the concentricity of the inner hole and outer circle of the stator is a key technical indicator. The existing method is to use a tapered mandrel for direct positioning and fix the stator by the friction of the tapered surface on the mandrel.

[0003] This positioning method has some shortcomings:

[0004] 1. For stators with large inner diameters (e.g., inner diameters of 100mm and above), the contact area of ​​the conical surface is limited, resulting in relatively poor positioning accuracy and easily leading to concentricity deviations of 0.02-0.05mm.

[0005] 2. When the stator is installed onto the tapered mandrel, the two may jam, making operation inconvenient;

[0006] 3. When changing stators of different specifications, a single tapered mandrel is difficult to adapt to stators of different sizes. The entire tapered mandrel needs to be replaced, resulting in low modularity, relatively poor machining accuracy, and relatively low machining efficiency. Utility Model Content

[0007] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a modular self-locking device for stator high concentricity machining, so as to solve the technical problems of relatively poor positioning accuracy, relatively poor machining accuracy, low modularity, inconvenient operation, and relatively low machining efficiency in the related technologies.

[0008] The technical solution to achieve the objective is: a modular self-locking device for stator high concentricity machining, comprising:

[0009] A support core having two first conical surfaces spaced apart from each other;

[0010] Two expansion joints, spaced apart, are fitted onto the support core and contact the first conical surface one-to-one;

[0011] Two replaceable contacts are connected one-to-one to the outer wall of the expansion member and spaced apart from the support core. They move together with the expansion member and contact and support the inner hole on the stator from the inside out.

[0012] At least two locking members are threaded one-to-one onto the expansion member and connected to the support core. When the locking member is activated, it moves the expansion member toward the center of the support core.

[0013] And at least two loosening members are connected one-to-one to the tightening member and are spaced apart from the locking member. When the loosening member moves on the tightening member, it abuts against the supporting core and moves the tightening member away from the center position of the supporting core.

[0014] Furthermore: the supporting core includes: an intermediate shaft segment, on which the first conical surface is symmetrically arranged;

[0015] And two end shaft segments, symmetrically connected to the intermediate shaft segment, wherein the outer diameter A of the end shaft segment is smaller than the outer diameter B on the first tapered surface, and the outer diameter B is smaller than the outer diameter C of the intermediate shaft segment;

[0016] The outer diameter B is the outer diameter of the smallest end of the first conical surface;

[0017] The outer diameter of the largest end of the first conical surface is equal to the outer diameter C.

[0018] Furthermore: the length of the intermediate shaft segment is less than or equal to the length of the end shaft segment.

[0019] Furthermore: the expansion member includes: a sleeve, which is fitted onto the support core;

[0020] The inner wall of the sleeve has a second conical surface, which fits against the first conical surface;

[0021] The sleeve has at least one through hole and at least one threaded hole on one side wall. The through hole is penetrated by the locking member, and the threaded hole is threadedly connected to the releasing member.

[0022] Furthermore, the outer wall of the sleeve has an annular groove, and the replaceable contact is provided at the annular groove.

[0023] Furthermore: the sleeve body has a plurality of through grooves, which are evenly distributed on the sleeve body and penetrate the annular groove and the second conical surface;

[0024] The length of the through groove is smaller than the length of the sleeve.

[0025] Furthermore: the replaceable contact consists of two semi-circular rings, which are engaged in the annular groove and connected to the sleeve by a connector.

[0026] Furthermore: the connecting component is a first internal hex bolt.

[0027] Furthermore: the locking component is a second hexagon socket head cap screw, which passes through the through hole and is threadedly connected to the support core. When the second hexagon socket head cap screw is rotated, the second hexagon socket head cap screw moves in conjunction with the expansion component toward the middle position of the support core. The partial expansion of the expansion component causes the replaceable contact component to contact and support the inner hole from the inside out.

[0028] Furthermore: the loosening component is a third hexagon socket head cap screw, threaded into the threaded hole. When the third hexagon socket head cap screw is rotated, one end of the third hexagon socket head cap screw abuts against the support core. The tightening component moves away from the center position of the support core. When the tightening component returns to its original position, the replaceable contact component loosens the inner hole.

[0029] The above technical solution has the following beneficial effects: A modular self-locking device for stator high concentricity processing is provided with a support core, a tensioning component, a replaceable contact component, a locking component, and a releasing component compared with related technologies;

[0030] In use, the support core forms a reliable support structure. Rotating the locking component causes the locking component to move in conjunction with the expansion component towards the center of the support core. The expansion component partially expands, and the replaceable contact component moves from the inside out to contact and support the inner hole on the stator, thus positioning the stator. After the stator is machined, the locking component is released, and the releasing component is rotated. One end of the releasing component presses against the support core, and the expansion component moves away from the center of the support core. The expansion component returns to its original position, and the replaceable contact component releases the inner hole.

[0031] This overcomes the technical problems of relatively poor positioning accuracy, relatively poor machining accuracy, low modularity, inconvenient operation, and relatively low machining efficiency. It achieves the technical effects of relatively high positioning accuracy, guaranteed machining accuracy, relatively high modularity, relatively convenient operation, and improved machining efficiency, and is practical. Attached Figure Description

[0032] Figure 1 This is a sectional view of the assembly after the stator has been internally braced and tightened.

[0033] Figure 2 This is a schematic diagram of the final assembly structure after the stator has been removed.

[0034] Figure 3 for Figure 2 Exploded view;

[0035] Figure 4 A schematic diagram of the structure supporting the core;

[0036] Figure 5 This is a schematic diagram of the expansion joint structure;

[0037] In the figure: 10. Support core, 11. First conical surface, 10-1. Intermediate shaft section, 10-2. End shaft section, 20. Expansion member, 20-1. Sleeve body, 20-11. Second conical surface, 20-12. Through hole, 20-13. Threaded hole, 20-14. Circular groove, 20-15. Through slot, 30. Replaceable contact member, 30-1. Semi-circular ring, 40. Locking member, 50. Loosening member, 60. Connecting member, 100. Stator, 101. Inner hole, 102. Outer circle. Detailed Implementation

[0038] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings;

[0039] A modular self-locking device for high concentricity machining of stators solves the technical problems of relatively poor positioning accuracy, relatively poor machining accuracy, low modularity, inconvenient operation, and relatively low machining efficiency in related technologies. This device can be manufactured and used, achieving the positive effects of relatively high positioning accuracy, guaranteed machining accuracy, relatively high modularity, relatively convenient operation, and improved machining efficiency. The overall concept is as follows:

[0040] Implementation

[0041] like Figure 1 , Figure 2 , Figure 3 As shown; a modular self-locking device for stator high concentricity machining, comprising:

[0042] A support core 10 has two first conical surfaces 11, which are spaced apart from each other.

[0043] Two expansion joints 20 are spaced apart and fitted onto the support core 10, contacting the first conical surface 11 one-to-one;

[0044] Two replaceable contact elements 30 are connected one-to-one to the outer wall of the expansion member 20 and are spaced apart from the support core 10. They move together with the expansion member 20 and contact and support the inner hole 101 on the stator 100 from the inside out.

[0045] At least two locking members 40 are threaded one-to-one onto the expansion member 20 and connected to the support core 10. When the locking member 40 is activated, it moves the expansion member 20 toward the middle position of the support core 10.

[0046] And at least two loosening parts 50, connected one-to-one to the tightening part 20, and spaced apart from the locking part 40. When the loosening part 50 moves on the tightening part 20, it abuts against the supporting core 10, and moves the tightening part 20 away from the middle position of the supporting core 10.

[0047] Specifically, during implementation, the support core 10, the tensioning component 20, the replaceable contact component 30, the locking component 40, and the releasing component 50 are combined to form a modular tooling structure, which is relatively convenient to use.

[0048] One end of the support core 10 is connected to the spindle chuck of a machine tool (e.g., a lathe), forming a reliable support structure. The stator 100 is fitted onto the replaceable contact 30. Rotating the locking member 40 causes the locking member 40 to move in conjunction with the expansion member 20 towards the center of the support core 10. The expansion member 20 partially expands, causing the replaceable contact 30 to contact and support the inner hole 101 of the stator 100 from the inside out, thus positioning the stator 100. The outer diameter 102 of the stator 100 is then machined. After completion, the locking part 40 is released, the releasing part 50 is rotated, one end of the releasing part 50 abuts against the support core 10, and the releasing part 50 moves in conjunction with the tensioning part 20 to a position away from the center of the support core 10. The tensioning part 20 returns to its original position, and the tensioning part 20, in conjunction with the replaceable contact part 30, releases the inner hole 101, and the stator 100 is released. The operation is relatively convenient, the processing efficiency is improved, the positioning accuracy is relatively high, and the processing accuracy is guaranteed, so that the concentricity of the inner hole 101 and the outer circle 102 on the stator 100 is ≤0.01mm.

[0049] Another implementation method:

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown; in implementation, the support core 10 includes: an intermediate shaft section 10-1, on which the first tapered surface 11 is symmetrically arranged; and two end shaft sections 10-2, symmetrically connected to the intermediate shaft section 10-1, wherein the outer diameter A of the end shaft section 10-2 is smaller than the outer diameter B of the first tapered surface 11, and the outer diameter B is smaller than the outer diameter C of the intermediate shaft section 10-1;

[0051] The outer diameter dimension B is the outer diameter dimension of the smallest end of the first conical surface 11; the outer diameter dimension of the largest end of the first conical surface 11 is equal to the outer diameter dimension C; the setting of the outer diameter dimension is beneficial for the expansion member 20 to be fitted on the support core 10, match the support core 10, and is relatively aesthetically pleasing.

[0052] The length of the intermediate shaft section 10-1 is less than or equal to the length of the end shaft section 10-2, which is advantageous for connecting the end shaft section 10-2 to the spindle chuck of a machine tool (e.g., a lathe), making it relatively convenient to use and with relatively good structural reliability.

[0053] Another implementation method:

[0054] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown; in practice, the expansion member 20 includes: a sleeve 20-1, which is sleeved on the support core 10, making assembly relatively convenient and facilitating sliding along the support core 10;

[0055] The inner wall of the sleeve 20-1 has a second conical surface 20-11, which fits against the first conical surface 11. This facilitates the sliding position of the expansion member 20 along the support core 10 and also facilitates the partial expansion and opening of the expansion member 20.

[0056] The sleeve 20-1 has at least one through hole 20-12 and at least one threaded hole 20-13 on one side wall. The through hole 20-12 is penetrated by the locking member 40, and the threaded hole 20-13 is threadedly connected to the loosening member 50, making assembly relatively convenient.

[0057] The outer wall of the sleeve 20-1 has an annular groove 20-14, and the replaceable contact 30 is provided at the annular groove 20-14, which makes assembly relatively convenient and the structure has relatively good reliability.

[0058] The sleeve 20-1 has a plurality of through grooves 20-15, which are evenly distributed on the sleeve 20-1 and penetrate the annular groove 20-14 and the second conical surface 20-11;

[0059] For example, the through groove 20-15 is a long strip groove, there are six of them, and the length of the through groove 20-15 is less than the length of the sleeve 20-1. The length of the through groove 20-15 is 80% of the length of the sleeve 20-1. When the locking member 40 moves in conjunction with the expansion member 20 towards the middle position of the support core 10, it is beneficial for the expansion member 20 to expand along the first conical surface 11.

[0060] Another implementation method:

[0061] like Figure 1 , Figure 2 , Figure 3As shown; in practice, the replaceable contact 30 consists of two semi-circular rings 30-1, which are locked in the annular groove 20-14 and connected to the sleeve 20-1 by a connector 60 inserted between them.

[0062] The replaceable contact 30 consists of two semi-circular rings 30-1, which are easy to fit into the annular groove 20-14. They are connected to the sleeve 20-1 via the connector 60, making assembly relatively convenient. Furthermore, when the expansion member 20 is stretched open, the two semi-circular rings 30-1 can move to different positions in different directions, contacting and supporting the inner hole 101 on the stator 100 from the inside out, resulting in relatively good structural reliability.

[0063] The connector 60 is a first internal hex bolt, which is relatively easy to assemble;

[0064] By changing the size of the replaceable contact 30 (e.g., changing the outer diameter of the replaceable contact 30), it can be used to position stators 100 of various specifications, with relatively good applicability and flexibility of use;

[0065] Another implementation method:

[0066] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown; in implementation, the locking member 40 is a second hexagon socket bolt, which passes through the through hole 20-12 and is threadedly connected to the support core 10. Rotating the second hexagon socket bolt causes the second hexagon socket bolt to move in conjunction with the expansion member 20 toward the middle position of the support core 10. The partial expansion of the expansion member 20 causes the replaceable contact member 30 to contact and support the inner hole 101 from the inside out, thereby locking the stator 100. The stator 100 is positioned, which is relatively convenient to operate, improves processing efficiency, and has relatively high positioning accuracy, ensuring processing accuracy.

[0067] Another implementation method:

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown; in practice, the loosening component 50 is a third hexagon socket head cap screw, threadedly connected to the threaded hole 20-13. Rotating the third hexagon socket head cap screw causes one end of the third hexagon socket head cap screw to abut against the support core 10. The tightening component 20 moves away from the center position of the support core 10. The tightening component 20 returns to its original position, and the replaceable contact component 30 is linked to loosen the inner hole 101. This facilitates the loosening of the stator 100, prevents jamming, makes operation relatively convenient, and improves processing efficiency.

[0069] In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience or simplification of the description, rather than indicating a specific orientation that must be present; the operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use;

[0070] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments;

[0071] The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the disclosed technology, based on the technical solution and inventive concept, should be included within the scope of protection.

Claims

1. A modular self-locking device for stator high concentricity machining, characterized in that, include: A support core having two first conical surfaces spaced apart from each other; Two expansion joints, spaced apart, are fitted onto the support core and contact the first conical surface one-to-one; Two replaceable contacts are connected one-to-one to the outer wall of the expansion member and are spaced apart from the support core. They move together with the expansion member and contact and support the inner hole on the stator from the inside out. At least two locking members are threaded one-to-one onto the expansion member and connected to the support core. When the locking member is activated, it moves the expansion member toward the center of the support core. And at least two loosening members are connected one-to-one to the tightening member and are spaced apart from the locking member. When the loosening member moves on the tightening member, it abuts against the supporting core and moves the tightening member away from the center position of the supporting core.

2. The modular self-locking device for stator high concentricity machining according to claim 1, characterized in that: The supporting core includes: an intermediate shaft section, on which the first conical surface is symmetrically arranged; And two end shaft segments, symmetrically connected to the intermediate shaft segment, wherein the outer diameter A of the end shaft segment is smaller than the outer diameter B on the first tapered surface, and the outer diameter B is smaller than the outer diameter C of the intermediate shaft segment; The outer diameter B is the outer diameter of the smallest end of the first conical surface; The outer diameter of the largest end of the first conical surface is equal to the outer diameter C.

3. A modular self-locking device for stator high concentricity machining according to claim 2, characterized in that: The length of the intermediate shaft segment is less than or equal to the length of the end shaft segment.

4. A modular self-locking device for stator high concentricity machining according to claim 1 or 3, characterized in that: The expansion member includes: a sleeve, which is fitted onto the support core; The inner wall of the sleeve has a second conical surface, which fits against the first conical surface; The sleeve has at least one through hole and at least one threaded hole on one side wall. The through hole is penetrated by the locking member, and the threaded hole is threadedly connected to the releasing member.

5. A modular self-locking device for stator high concentricity machining according to claim 4, characterized in that: The outer wall of the sleeve has an annular groove, and the replaceable contact is provided at the annular groove.

6. A modular self-locking device for stator high concentricity machining according to claim 5, characterized in that: The sleeve has several through grooves, which are evenly distributed on the sleeve and penetrate the annular groove and the second conical surface; The length of the through groove is smaller than the length of the sleeve.

7. A modular self-locking device for stator high concentricity machining according to claim 5, characterized in that: The replaceable contact consists of two semi-circular rings, which are engaged in the annular groove and connected to the sleeve by a connector.

8. A modular self-locking device for stator high concentricity machining according to claim 7, characterized in that: The connector is a first internal hex bolt.

9. A modular self-locking device for stator high concentricity machining according to claim 4, characterized in that: The locking component is a second hexagon socket head cap screw, which passes through the through hole and is threaded to the support core. When the second hexagon socket head cap screw is rotated, the second hexagon socket head cap screw moves in conjunction with the expansion member toward the middle position of the support core. The expansion member partially expands, which in turn causes the replaceable contact member to contact and support the inner hole from the inside out.

10. A modular self-locking device for stator high concentricity machining according to claim 4, characterized in that: The loosening component is a third hexagon socket head cap screw, which is threaded into the threaded hole. When the third hexagon socket head cap screw is rotated, one end of the third hexagon socket head cap screw abuts against the support core. The tightening component moves away from the center position of the support core. When the tightening component returns to its original position, the replaceable contact component is activated to loosen the inner hole.

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