Radial clamping and positioning jig for motor rotor

Abstract

The utility model discloses a radial clamping and positioning jig for a motor rotor, and belongs to the technical field of motor rotor manufacturing. Comprising a clamping body and a guide column which can move up and down in the vertical direction and is movably embedded in an inner cavity of the clamping body. The top of the clamping body is provided with a positioning reference part used for bearing the end face of the rotor, the periphery of the clamping body is provided with a plurality of clamping jaws and positioning pins which can horizontally move in the radial direction of the guide column, the clamping jaws can be arranged on the periphery of the positioning reference part in a surrounding mode, and the positioning pins penetrate through the clamping body. The two ends of the positioning pin abut against the clamping jaw and the conical face arranged at the end of the guide column respectively, and an elastic piece used for driving the clamping jaw to abut against the positioning pin is further arranged on the periphery of the clamping body. The motor rotor radial clamping and positioning jig solves the problems that a traditional rotor radial positioning jig is cumbersome in structure, lagged in response and poor in synchronism.

Description

Technical Field

[0001] This utility model belongs to the field of motor rotor manufacturing technology, specifically relating to a radial clamping and positioning fixture for a motor rotor. Background Technology

[0002] As a key moving component of a motor, the rotor requires multiple operations such as testing, curing, and assembly during its production and manufacturing process. During assembly, testing, and curing, the rotor product needs to be radially clamped, and the accuracy of the radial clamping of the rotor product directly affects the quality of the rotor product.

[0003] In existing technologies, some positioning fixtures typically use multiple evenly distributed, independently operable cylinders as the power drive for radial clamping of rotor products. However, due to issues such as poor cylinder synchronization and air pressure fluctuations, the clamping force is uneven, and the positioning accuracy and stability are difficult to meet requirements. While using multiple independently controllable servo electric cylinders as the power drive for radial clamping of rotor products can meet the accuracy requirements, the equipment is expensive and maintenance is complex. More importantly, the above solutions are difficult to adapt to dynamic processing scenarios such as assembly lines or indexing discs, and suffer from drawbacks such as bulky structures and slow response times.

[0004] Therefore, there is an urgent need for a radial clamping and positioning fixture for motor rotors that can meet the requirements of compact structure, controllable cost, and adaptability to dynamic production lines while ensuring high precision and stability. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a radial clamping and positioning fixture for motor rotors, which solves the problems of bulky structure, slow response and poor synchronization of traditional radial positioning fixtures.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a radial clamping and positioning fixture for a motor rotor, comprising a clamping body and a guide post that can move up and down along the vertical direction and is movably embedded in the inner cavity of the clamping body;

[0007] The clamping body has a positioning reference portion on its top for supporting the rotor end face. The outer periphery of the clamping body has several clamping jaws and positioning pins that can move horizontally along the radial direction of the guide post. The clamping jaws can surround the positioning reference portion. The positioning pins pass through the clamping body, and the two ends of the positioning pins abut against the clamping jaws and the conical surface at the end of the guide post, respectively. The outer periphery of the clamping body also has an elastic element for driving the clamping jaws to abut against the positioning pins.

[0008] Optionally, the elastic element includes a support spring and a limiting plate detachably connected to the clamping body by fastening bolts. The support spring is horizontally arranged along the moving direction of the clamping jaws, and both ends of the support spring are respectively embedded in the limiting grooves provided on the clamping jaws and the limiting plate.

[0009] Optionally, the locating pin abutting against one end of the guide post is hemispherical.

[0010] Optionally, the positioning reference part is provided with a positioning post that can be inserted and engaged with the rotor end face.

[0011] Optionally, several of the clamping claws are arranged in a circular array along the central axis of the guide post.

[0012] Optionally, the positioning reference part has a through hole in the middle that connects to the inner cavity of the clamping body, and the guide post has a through hole arranged coaxially with the through hole. The section of the through hole located in the inner cavity has a frustum-shaped cross section, and the inner wall of this section of the through hole can fit with the conical surface at the end of the guide post.

[0013] Optionally, the clamping body is disposed on the mounting base, and the mounting base is provided with a limiting mounting hole for the guide post to pass through movably;

[0014] The guide post includes a first section movably embedded in the inner cavity of the clamping body and a second section capable of moving up and down along the limiting mounting hole, and the shoulder between the first section and the second section can abut against the mounting base.

[0015] Optionally, the gripping claws may be provided with Teflon on the side that can abut against the outer periphery of the rotor.

[0016] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: When the guide post moves upward, its end conical surface pushes the positioning pin to move radially outward along the guide post, causing the clamping claws to disperse outward around the positioning reference part, exposing the area of ​​the positioning reference part for placing the rotor. By moving the guide post downward, the elastic potential energy accumulated by the elastic element due to compression is released and acts on the clamping claws, causing several clamping claws to retract inward and abut against the outer circumference of the rotor, thereby achieving radial clamping. The entire rotor radial clamping and positioning fixture has a simple structure and can respond quickly and move synchronously, solving the problems of bulky structure, slow response, and poor synchronization of traditional rotor radial positioning fixtures. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1This is a schematic diagram of the structure of the preferred embodiment of the present invention when the rotor is placed on the radial clamping and positioning fixture of the motor rotor;

[0019] Figure 2 This is a preferred embodiment of the present invention. Figure 1 A top-view structural diagram;

[0020] Figure 3 This is a preferred embodiment of the present invention. Figure 2 A schematic cross-sectional view at point AA;

[0021] Figure 4 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the clamping claws are installed on the clamping body;

[0022] Among them, 1. clamping body; 101. positioning reference part; 102. positioning post; 103. through hole; 2. guide post; 2001. first section; 2002. second section; 201. conical surface; 202. through hole; 3. clamping claw; 4. positioning pin; 5. support spring; 6. limiting plate; 7. mounting base; 36. limiting groove. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0025] like Figures 1-4As shown, a radial clamping and positioning fixture for a motor rotor includes a clamping body 1 and a guide post 2 that can move vertically up and down and is movably embedded in the inner cavity of the clamping body 1. The inner cavity sidewall of the clamping body 1 is clearance-fitted with the guide post 2, and the guide post 2 can move freely back and forth within the inner cavity of the clamping body 1. Simultaneously, a positioning reference part 101 for supporting the rotor end face is provided at the top of the clamping body 1. The positioning reference part 101 can provide precise positioning for the rotor end face, helping to improve the accuracy of the entire assembly or processing process. Furthermore, a plurality of clamping jaws 3 and positioning pins 4 that can move horizontally along the radial direction of the guide post 2 are provided on the outer periphery of the clamping body 1. The clamping jaws 3 can surround the positioning reference part 101, and the positioning pins 4 penetrate the clamping body 1. The two ends of the positioning pins 4 respectively abut against the clamping jaws 3 and the conical surface 201 provided at the end of the guide post 2. An elastic element for driving the clamping jaws 3 to abut against the positioning pins 4 is also provided on the outer periphery of the clamping body 1.

[0026] Specifically, the guide post 2 has the characteristic of being able to move vertically. When the guide post 2 moves upward, its end conical surface 201 interacts with the positioning pin 4. One end of the positioning pin 4 abuts against the conical surface 201 at the end of the guide post 2, and the other end contacts the clamping jaw 3. As the guide post 2 gradually moves upward, the conical surface 201 of the guide post 2 can convert the vertical displacement into a radial thrust on the positioning pin 4, causing the positioning pin 4 to move outward radially along the guide post 2. Since the positioning pin 4 can abut against the clamping jaw 3, the movement of several positioning pins 4 can drive several corresponding clamping jaws 3 to move outward around the positioning reference part 101. At the same time, during this process, the elastic element on the outer periphery of the clamping body 1 will undergo compression deformation due to the outward movement of the clamping jaws 3, thereby storing elastic potential energy. After the gripping claws 3 disperse and move outward, the area exposed by the positioning reference part 101 at the top of the gripping body 1 is sufficient to place the rotor. The rotor can be loaded manually or by a robot so that the end face of the rotor fits against the positioning reference part 101. Then, by pulling down the guide post 2, it moves downward, thereby gradually releasing the elastic potential energy accumulated by the elastic element. At this time, under the action of the elastic element, several gripping claws 3 can retract radially inward along the guide post 2 until one side of the gripping claw 3 abuts against the outer periphery of the rotor, realizing radial clamping of the rotor.

[0027] It is important to note that in practical applications, the end of the guide post 2 that faces away from the clamping body 1 can be connected to the output end of the drive unit. The drive unit can be selected from existing technologies, including but not limited to cylinders, electric cylinders, and linear motors. When the guide post 2 is directly driven up and down by cylinders, electric cylinders, or linear motors, the several clamping jaws 3 can repeatedly move outward and inward, thereby meeting the accuracy requirements for radial clamping and positioning of the rotor product. Furthermore, the clamping and positioning fixture in this technical solution also features a lightweight and flexible structure and a fast response characteristic, meeting the needs of dynamic processing scenarios such as assembly lines and indexing discs.

[0028] Meanwhile, to prevent the clamping claws 3 from leaving indentations on the surface of the rotor, Teflon is provided on the side of the clamping claws 3 that can come into contact with the outer periphery of the rotor.

[0029] The above, such as Figure 2 , Figure 3 As shown, the elastic element includes a support spring 5 and a limiting plate 6 detachably connected to the clamping body 1 via fastening bolts. Specifically, the fastening bolts can pass through the limiting plate 6, and one end of the bolt passing through the limiting plate 6 can be threadedly connected to the clamping body 1. Since the bolt head cannot pass through the limiting plate 6, the limiting plate 6 can be detachably connected to the clamping body 1. The support spring 5 is horizontally positioned along the moving direction of the clamping jaws 3, and both ends of the support spring 5 are respectively embedded in the limiting grooves 36 provided on the clamping jaws 3 and the limiting plate 6 to limit the position of the support spring 5. Simultaneously, in this technical solution, as the guide post 2 gradually moves upward, the support spring 5 can be compressed by the outwardly dispersing clamping jaws 3, thereby accumulating elastic potential energy. It should be noted that the number of support springs 5 ​​used between a single set of clamping claws 3 and the limiting plate 6 in this technical solution includes, but is not limited to, one. When the guide post 2 moves downward to a position where its conical surface 201 does not contact the positioning post 102, the support spring 5 still accumulates elastic potential energy. Therefore, within the clamping and positioning range of the clamping claws 3, the stability of the rotor radial clamping and positioning can be effectively guaranteed.

[0030] Furthermore, in one embodiment of this technical solution, the outer periphery of the clamping body 1 is provided with a plurality of limiting grooves corresponding to the clamping claws 3. The central axis of the limiting groove coincides with the radial direction of the guide post 2, and the limiting groove is one or more of the following: dovetail groove, T-shaped groove, U-shaped groove, V-shaped groove, and rectangular groove, so that the clamping claws 3 can move linearly along the limiting groove.

[0031] In this embodiment, the end of the positioning pin 4 that abuts against the guide post 2 is in the shape of a hemispherical ball to reduce the contact area between the positioning pin 4 and the guide post 2, thereby reducing the wear on the surface of the positioning pin 4 and the guide post 2 and improving the service life of the positioning pin 4 and the guide post 2.

[0032] At the same time, such as Figure 4 As shown, the positioning reference part 101 is provided with a positioning post 102 that can be inserted and engaged with the rotor end face, thereby further improving the positional accuracy of the rotor on the positioning reference part 101.

[0033] Furthermore, such as Figure 2 As shown, several clamping jaws 3 are arranged in a circular array along the central axis of the guide post 2, so that each clamping jaw 3 can be evenly distributed around the object to be clamped (rotor). During the clamping process, a uniform force can be applied to the object to be clamped from multiple directions, thereby effectively avoiding deformation, tilting or slippage of the object to be clamped due to uneven force, and ensuring the stability and reliability of the positioning clamping.

[0034] Furthermore, since a motor shaft is provided on part of the rotor, a through hole 103 is provided in the middle of the positioning reference part 101 to connect to the inner cavity of the clamping body 1. A through hole 202 is provided on the guide post 2, which is coaxially arranged with the through hole 103, for the motor shaft to pass through. At the same time, the section of the through hole 103 located in the inner cavity has a frustum-shaped cross section, and the inner wall of this section of the through hole 103 can fit against the conical surface 201 at the end of the guide post 2, thereby limiting the maximum upward stroke of the guide post 2. It can also prevent indentations from appearing on the conical surface 201 at the end of the guide post 2, and improve the smoothness of the sliding of the conical surface 201 of the guide post 2 relative to the positioning pin 4.

[0035] At the same time, to limit the maximum downward travel of guide column 2, such as Figure 1 , Figure 2 , Figure 3 As shown, the clamping body 1 is mounted on the mounting base 7, and the mounting base 7 is provided with a limiting mounting hole for the guide post 2 to pass through. The guide post 2 includes a first segment 2001 movably embedded in the inner cavity of the clamping body 1 and a second segment 2002 that can move up and down along the limiting mounting hole. The diameters of the first segment 2001 and the second segment 2002 are not equal, with the diameter of the first segment 2001 being larger than that of the second segment 2002, and the shoulder between the first segment 2001 and the second segment 2002 can abut against the mounting base 7.

[0036] Working principle: As the guide post 2 moves upward, the conical surface 201 of the guide post 2 converts the vertical displacement into a radial thrust on the positioning pin 4, causing the positioning pin 4 to move outward along the radial direction of the guide post 2. Since the positioning pin 4 can abut against the clamping claws 3, the movement of several positioning pins 4 can drive several corresponding clamping claws 3 to move outward around the positioning reference part 101. During this process, the support spring 5 can be compressed by the outwardly moving clamping claws 3, thereby accumulating elastic potential energy. Then, the rotor is placed upright on the positioning reference part 101 manually or by a robot, and then the guide post 2 is pulled down to move it downward, thereby gradually releasing the elastic potential energy accumulated by the support spring 5. At this time, several clamping claws 3 can retract inward along the radial direction of the guide post 2 under the action of the elastic element, until one side of the clamping claw 3 abuts against the outer periphery of the rotor, realizing the radial clamping of the rotor.

[0037] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A radial clamping and positioning fixture for an electric motor rotor, characterized in that: It includes a clamping body (1) and a guide post (2) that can move up and down in the vertical direction and is movably embedded in the inner cavity of the clamping body (1); The clamping body (1) has a positioning reference part (101) on its top for bearing the rotor end face. The clamping body (1) has a number of clamping claws (3) and positioning pins (4) that can move horizontally along the radial direction of the guide post (2). The clamping claws (3) can surround the positioning reference part (101). The positioning pins (4) penetrate the clamping body (1). The two ends of the positioning pins (4) abut against the clamping claws (3) and the conical surface (201) at the end of the guide post (2), respectively. The clamping body (1) also has an elastic element for driving the clamping claws (3) to abut against the positioning pins (4).

2. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The elastic element includes a support spring (5) and a limiting plate (6) detachably connected to the clamping body (1) by fastening bolts. The support spring (5) is horizontally arranged along the moving direction of the clamping claw (3), and the two ends of the support spring (5) are respectively embedded in the limiting groove (36) provided on the clamping claw (3) and the limiting plate (6).

3. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The positioning pin (4) abuts against one end of the guide post (2) and is in the shape of a hemispherical ball.

4. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The positioning reference part (101) is provided with a positioning post (102) that can be inserted and engaged with the rotor end face.

5. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: Several of the clamping claws (3) are arranged in a circular array along the central axis of the guide post (2).

6. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The positioning reference part (101) has a through hole (103) in the middle that connects to the inner cavity of the clamping body (1). The guide post (2) has a through hole (202) arranged coaxially with the through hole (103). The section of the through hole (103) in the inner cavity has a frustum-shaped cross section, and the inner wall of the through hole (103) can fit with the conical surface (201) at the end of the guide post (2).

7. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The clamping body (1) is disposed on the mounting base (7), and the mounting base (7) is provided with a limiting mounting hole for the guide post (2) to be movably inserted; The guide post (2) includes a first section (2001) movably embedded in the inner cavity of the clamping body (1) and a second section (2002) capable of moving up and down along the limiting mounting hole, and the shoulder between the first section (2001) and the second section (2002) can abut against the mounting base (7).

8. The radial clamping and positioning fixture for the motor rotor according to claim 1, characterized in that: The clamping claw (3) has a Teflon coating on one side that can fit against the outer periphery of the rotor.

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