A multi-pole magnetic ring magnetizing tool

Abstract

The application discloses a kind of multi-pole magnetic ring magnetizing tool, belongs to magnetizing fixture technical field, including support plate, by two support plates relative clamping magnetic ring, a plurality of magnetizing pole arms are fixedly arranged between two support plates and the outer wall of magnetic ring is resisted, first threaded groove is provided at the side of support plate away from magnetic ring, first threaded groove is threadedly connected with first adjusting ring, one end of first adjusting ring is fixedly connected with the central shaft capable of extending to the inside of magnetic ring, the central shaft is rotatably connected with support plate, sliding chamber is provided in support plate, clamping plate is axially slidably installed in sliding chamber, clamping plate is rotatably connected with the central shaft, rotating first adjusting ring can make clamping plate move axially along support plate to clamp magnetic ring by clamping plate.The application can ensure that the center surface of magnetic ring and the center surface of magnetizing pole arm are located on the same plane by the clamping plate of adjustable height after the axial clamping of different height magnetic ring, so as to ensure the magnetizing symmetry of different height magnetic ring.

Description

Technical Field

[0001] This invention belongs to the field of magnetization fixture technology, specifically relating to a multi-pole magnetic ring magnetization fixture. Background Technology

[0002] Multipole magnetic rings are widely used in various precision motors, sensors, and other fields. In the manufacturing of multipole magnetic rings, magnetization is a crucial step that determines their performance. Magnetization requires specialized magnetization fixtures to position the magnetic ring, and a strong instantaneous magnetizing current or magnetic field is conducted through a magnetically conductive / conductive electrode head.

[0003] Existing technologies, such as Chinese Patent Publication No. CN117275874B, disclose a magnetizing device for inner and outer circular monopole radial magnetic rings. This device uses an outer ring clamp to hold and position the magnetic ring before magnetization. However, the magnetic field strength generated by the magnetizing coil varies along its axial direction, typically being strongest at the center and gradually weakening towards both ends. If the magnetic ring is not centered, the magnetic field strength at its upper and lower ends will be unequal. This results in different degrees of magnetization at both ends of the ring, disrupting the symmetry of the magnetization process. Therefore, the fixed-height outer ring clamp in the aforementioned prior art is not suitable for magnetizing magnetic rings of different heights.

[0004] Therefore, a multi-pole magnetic ring magnetization fixture is needed to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a multi-pole magnetic ring magnetizing fixture to solve the problem that the magnetizing height of the existing magnetizing fixture cannot be adjusted, which easily causes the magnetization symmetry to be destroyed when magnetizing magnetic rings of different heights.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a multi-pole magnetic ring magnetizing fixture, comprising a support plate. The magnetic ring is clamped between two support plates to restrict its axial displacement. Multiple magnetizing pole arms, abutting the outer wall of the magnetic ring, are fixedly arranged between the two support plates. These magnetizing pole arms are used to magnetize the magnetic ring. The two support plates are symmetrically arranged about the magnetizing pole arms. A first threaded groove is provided on the side of the support plate away from the magnetic ring. A first adjusting ring is threadedly connected to the first threaded groove. One end of the first adjusting ring is fixedly connected to a central shaft extending into the magnetic ring. The central shaft is rotatably connected to the support plate. A sliding chamber is provided within the support plate. A clamping plate, capable of sliding axially along the support plate, is slidably installed within the sliding chamber. The clamping plate is rotatably connected to the central shaft. Rotating the first adjusting ring allows the clamping plate to move axially along the support plate to clamp the magnetic ring.

[0007] Furthermore, a splined shaft is coaxially fixed on the central shaft of one of the two support plates, and a splined sleeve that mates with the splined shaft is fixedly installed on the central shaft of the other support plate. When axially clamping the magnetic ring, the two support plates are brought together so that the splined sleeve is fitted onto the splined shaft. Then, by rotating one of the two first adjusting rings, the two central shafts can be rotated so that the two clamping plates move closer together synchronously to axially clamp the magnetic ring.

[0008] Furthermore, the clamping plate is provided with multiple strip-shaped grooves circumferentially around the central axis. A support rod that can slide radially along the clamping plate is slidably disposed in the strip-shaped grooves. The support plate is provided with a second threaded groove near the magnetic ring. The second threaded groove is connected to the sliding chamber. A second adjusting ring is threadedly connected in the second threaded groove. The second adjusting ring is provided with an arc-shaped notch that corresponds one-to-one with the second threaded groove. The support rod passes through the arc-shaped notch and is slidably connected to the arc-shaped notch. Rotating the second adjusting ring can drive the arc-shaped notch to rotate around the central axis so that the support rod slides along the strip-shaped groove. An arc-shaped plate that can abut against the bottom wall of the magnetic ring and a positioning post that can abut against the inner wall of the magnetic ring are fixedly disposed at the end of the support rod passing through the arc-shaped notch. The second adjusting ring is provided with a through hole for the central axis to pass through.

[0009] Furthermore, positioning blocks are fixedly installed at both ends of the magnetizing pole arm, and the height of the positioning blocks is higher than the height of the magnetizing pole arm. Multiple sliding grooves extending radially along the support plate are axially arranged around the axis of the support plate, and each sliding groove corresponds to a magnetizing pole arm. Support blocks corresponding to the positioning blocks are slidably arranged in the sliding grooves, and insertion rods are fixedly installed on the support blocks. The two side walls of the positioning blocks arranged axially opposite each other are provided with slots for insertion and engagement with the insertion rods. A screw is rotatably connected in the sliding groove, and the screw is threadedly connected to the support block. Rotating the screw can make the magnetizing pole arm slide along the sliding groove to move closer to or away from the magnetic ring.

[0010] Furthermore, a gear is fixedly installed on the side wall of the support plate extending from one end of the screw. A toothed ring that meshes with multiple gears is rotatably connected to the side wall of the support plate. Rotating the toothed ring can drive multiple gears to rotate synchronously, so that multiple magnetizing pole arms can move synchronously to clamp the magnetic ring.

[0011] Furthermore, each key on the spline shaft corresponds one-to-one with a magnetized pole arm, so that when the spline sleeve is fitted onto the spline shaft, the grooves on the two oppositely positioned support plates are positioned opposite each other.

[0012] Furthermore, a retaining ring, which is integrally fixed with the support plate, is provided between the second threaded groove and the sliding chamber to separate the second threaded groove and the sliding chamber. The height of the sliding chamber is higher than the height of the clamping plate.

[0013] The beneficial effect of the present invention is that, by using an adjustable height clamping plate, after axially clamping magnetic rings of different heights, it is possible to ensure that the center plane of the magnetic ring and the center plane of the magnetizing pole arm are located on the same plane, thereby ensuring the magnetization symmetry of magnetic rings of different heights. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the present invention; Figure 2 This is a partial schematic diagram of the mounting structure of the second adjusting ring according to an embodiment of the present invention.

[0015] The following components are labeled in the attached diagram: support plate 1, first threaded groove 101, first adjusting ring 102, central shaft 103, sliding chamber 104, splined shaft 105, splined sleeve 106, second threaded groove 107, second adjusting ring 108, arc-shaped notch 109, through hole 110, retaining ring 111, magnetic ring 2, magnetizing pole arm 3, positioning block 301, sliding groove 302, support block 303, insertion rod 304, slot 305, screw 306, gear 307, gear ring 308, clamping plate 4, strip groove 401, support rod 402, arc plate 403, positioning post 404. Detailed Implementation

[0016] like Figures 1-2As shown, this invention discloses a multi-pole magnetic ring magnetizing fixture, comprising: a support plate 1, which clamps a magnetic ring 2 relative to the magnetic ring 2 to restrict the axial displacement of the magnetic ring 2; a plurality of magnetizing pole arms 3 fixedly arranged between the two support plates 1, abutting against the outer wall of the magnetic ring 2; the two support plates 1 are symmetrically arranged about the magnetizing pole arms 3; a strong instantaneous current generated by a magnetizer passes through the magnetizing pole arms 3 to magnetize the magnetic ring 2 in multiple poles; a first threaded groove 101 is provided on the side of the support plate 1 away from the magnetic ring 2; a first adjusting ring 102 is threadedly connected to the first threaded groove 101; a central shaft 103 extending into the interior of the magnetic ring 2 is fixedly connected to one end of the first adjusting ring 102; the central shaft 103 is rotatably connected to the support plate 1; and a sliding chamber 10 is provided inside the support plate 1. 4. A clamping plate 4 that can slide along the axial direction of the support plate 1 is slidably installed in the sliding chamber 104. The clamping plate 4 is rotatably connected to the central shaft 103. Rotating the first adjusting ring 102 can move the clamping plate 4 along the axial direction of the support plate 1. A spline shaft 105 is coaxially fixed on the central shaft 103 of one of the two support plates 1. A spline sleeve 106 that cooperates with the spline shaft 105 is fixedly installed on the central shaft 103 of the other support plate 1. When axially clamping the magnetic ring 2, the two support plates 1 are closed relative to each other so that the spline sleeve 106 is sleeved on the spline shaft 105. Then, by rotating one of the two first adjusting rings 102, the two central shafts 103 can be rotated so that the two clamping plates 4 move closer together synchronously to axially clamp the magnetic ring 2.

[0017] In this scheme, among the two support plates 1, the first support plate serves as the base plate, with the spline shaft 105 fixedly mounted on the central shaft 103 of the base plate, and the second support plate serves as the top plate, with the spline sleeve 106 fixedly mounted on the central shaft 103 of the top plate. The top plate and base plate have the same structure but different materials; the top plate is made of a transparent material for easy observation. The positioning process for the magnetic ring 2 includes axial clamping and radial clamping. First, the magnetic ring 2 is placed on the clamping plate 4 on the base plate. Based on the radial dimension of the magnetic ring 2, multiple magnetizing pole arms 3 are fixed to the base plate to radially clamp and fix the magnetic ring 2. Then, the top plate is positioned relative to the base plate. When the two support plates 1 and 1 are closed together, the spline sleeve 106 is fitted onto the spline shaft 105, so that the central shaft 103 of the two support plates 1 can rotate synchronously. Since the two support plates 1 are arranged opposite each other, and the structures of the two first threaded grooves 101 and the two first adjusting rings 102 are the same, rotating one of the first adjusting rings 102 can drive the two first adjusting rings 102 to move closer synchronously, thereby axially clamping the magnetic ring 2 and ensuring that the center surface of the magnetic ring 2 and the center surface between the two support plates 1 are on the same plane. Thus, the center surface of the magnetic ring 2 and the center surface of the magnetizing pole arm 3 are on the same plane, so that the symmetry of the magnetization of the magnetic ring 2 can be ensured during magnetization.

[0018] This solution uses an adjustable clamping plate 4 to ensure that the center plane of the magnetic ring 2 and the center plane of the magnetizing pole arm 3 are on the same plane after the magnetic ring 2 of different heights are axially clamped, thereby ensuring the magnetization symmetry of the magnetic ring 2 of different heights.

[0019] In one embodiment of the present invention, a plurality of strip grooves 401 are circumferentially arranged on the clamping plate 4 with the central axis 103 as the center. A support rod 402 capable of sliding radially along the clamping plate 4 is slidably arranged in the strip grooves 401. A second threaded groove 107 is provided on the side of the support plate 1 near the magnetic ring 2. The second threaded groove 107 is connected to the sliding chamber 104. A second adjusting ring 108 is threadedly connected in the second threaded groove 107. The second adjusting ring 108 is provided with arc-shaped grooves corresponding one-to-one with the second threaded groove 107. The support rod 402 passes through the arc-shaped notch 109 and is slidably connected to it. Rotating the second adjusting ring 108 can drive the arc-shaped notch 109 to rotate around the central axis 103 so that the support rod 402 slides along the strip groove 401. The end of the support rod 402 passing through the arc-shaped notch 109 is fixedly provided with an arc-shaped plate 403 that can abut against the bottom wall of the magnetic ring 2 and a positioning post 404 that can abut against the inner wall of the magnetic ring 2. The second adjusting ring 108 is provided with a through hole 110 for the central axis 103 to pass through.

[0020] In this design, the magnetic ring 2 is axially clamped by the arc-shaped plate 403. When the support rod 402 slides along the strip groove 401, it can abut against the inner wall of the magnetic ring 2 through the positioning pin 404 to ensure the initial centering and clamping of magnetic rings 2 with different inner diameters. The threaded connection between the second adjusting ring 108 and the second threaded groove 107 ensures the stability of the second adjusting ring 108 after it rotates to the preset position. A retaining ring 111, which is fixed to the support plate 1, is provided between the second threaded groove 107 and the sliding chamber 104 to separate the second threaded groove 107 and the sliding chamber 104, so as to avoid interference between the rotation of the second adjusting ring 108 and the axial movement of the clamping plate 4. The height of the sliding chamber 104 is higher than the height of the clamping plate 4.

[0021] In one embodiment of the present invention, positioning blocks 301 are fixedly provided at both ends of the magnetizing pole arm 3. The height of the positioning blocks 301 is higher than the height of the magnetizing pole arm 3. The positioning blocks 301 near the magnetic ring 2 abut against the magnetic ring 2 to limit the radial displacement of the magnetic ring 2. Multiple sliding grooves 302 extending radially along the axis of the support plate 1 are provided circumferentially on the support plate 1. Each sliding groove 302 corresponds to a magnetizing pole arm. Support blocks 303 corresponding to positioning blocks 301 are slidably provided in the sliding grooves 302. Insert rods 304 are fixedly provided on the support blocks 303. The two side walls of the positioning blocks 301 arranged axially opposite each other are provided with slots 305 that are inserted and engaged with the insert rods 304. A screw 306 is rotatably connected in the sliding groove 302. The screw 306 is threadedly connected to the support block 303. Rotating the screw 306 can make the magnetizing pole arm 3 slide along the sliding groove 302 to move closer to or away from the magnetic ring 2.

[0022] In this scheme, the magnetizing pole arm 3 is first inserted and fixed on the support block 303 by means of the cooperation between the insertion rod 304 and the slot 305. After the magnetic ring 2 is placed on the base plate, the magnetizing pole arm 3 is moved closer to the magnetic ring 2 by rotating the multiple screws 306 on the base plate to clamp the magnetic ring 2. Then, the multiple screws 306 on the top plate are rotated to move the support block 303 to the position corresponding to the insertion rod 304 on the top plate and the slot 305 on the upper side of the magnetizing pole arm 3, so that the top plate covers the magnetizing pole arm 3.

[0023] This solution uses the rotating screw 306 to move the magnetizing pole arm 3, so as to accommodate the clamping of magnetic rings 2 with different outer diameters.

[0024] In one embodiment of the present invention, a gear 307 is fixedly mounted on the side wall of the support plate 1 extending from one end of the screw 306. A gear ring 308 is rotatably connected to the side wall of the support plate 1, and meshes with multiple gears 307. Rotating the gear ring 308 can drive multiple gears 307 to rotate synchronously, so that multiple magnetizing pole arms 3 move synchronously to clamp the magnetic ring 2. This ensures the alignment of the clamping of the magnetic ring 2, the synchronicity of the movement of the magnetizing pole arms 3, and the convenience of operation.

[0025] In one embodiment of the present invention, each key on the spline shaft 105 corresponds one-to-one with the magnetizing pole arm 3, so that when the spline sleeve 106 is fitted on the spline shaft 105, the sliding grooves 302 on the two oppositely arranged support plates 1 are arranged oppositely, thereby facilitating the insertion rod 304 on the top plate to be smoothly inserted and fixed in the slot 305 on the magnetizing pole arm 3.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A multi-pole magnetic ring magnetizing fixture, comprising: A support plate, characterized in that the axial displacement of the magnetic ring can be restricted by clamping the magnetic ring with two support plates relative to each other. A plurality of magnetizing pole arms, abutting against the outer wall of the magnetic ring, are fixedly arranged between the two support plates. The magnetizing pole arms are used to magnetize the magnetic ring. The two support plates are symmetrically arranged about the magnetizing pole arms. A first threaded groove is provided on the side of the support plate away from the magnetic ring. A first adjusting ring is threadedly connected to the first threaded groove. One end of the first adjusting ring is fixedly connected to a central shaft that extends into the interior of the magnetic ring. The central shaft is rotatably connected to the support plate. A sliding chamber is provided inside the support plate. A clamping plate that can slide along the axial direction of the support plate is slidably installed inside the sliding chamber. The clamping plate is rotatably connected to the central shaft. Rotating the first adjusting ring allows the clamping plate to move along the axial direction of the support plate to clamp the magnetic ring.

2. The multi-pole magnetic ring magnetization fixture according to claim 1, characterized in that: A spline shaft is coaxially fixed on the central shaft of one of the two support plates, and a spline sleeve that mates with the spline shaft is fixedly installed on the central shaft of the other support plate. When axially clamping the magnetic ring, the two support plates are brought together so that the spline sleeve is fitted onto the spline shaft. Then, by rotating one of the two first adjusting rings, the two central shafts can be rotated so that the two clamping plates move closer together synchronously to axially clamp the magnetic ring.

3. The multi-pole magnetic ring magnetization fixture according to claim 2, characterized in that: The clamping plate has multiple strip-shaped grooves arranged circumferentially around the central axis. A support rod that can slide radially along the clamping plate is slidably disposed in the strip-shaped grooves. The support plate has a second threaded groove near the magnetic ring, which is connected to the sliding chamber. A second adjusting ring is threadedly connected in the second threaded groove. The second adjusting ring has an arc-shaped notch that corresponds to the second threaded groove. The support rod passes through the arc-shaped notch and is slidably connected to it. Rotating the second adjusting ring can drive the arc-shaped notch to rotate around the central axis, so that the support rod slides along the strip-shaped groove. An arc-shaped plate that can abut against the bottom wall of the magnetic ring and a positioning post that can abut against the inner wall of the magnetic ring are fixedly disposed at the end of the support rod that passes through the arc-shaped notch. The second adjusting ring has a through hole for the central axis to pass through.

4. The multi-pole magnetic ring magnetizing fixture according to claim 3, characterized in that: Both ends of the magnetizing pole arm are fixedly provided with positioning blocks, the height of the positioning blocks being higher than the height of the magnetizing pole arm. The support plate is provided with multiple sliding grooves extending radially along the support plate axis, with each sliding groove corresponding to a magnetizing pole arm. Support blocks corresponding to the positioning blocks are slidably disposed in the sliding grooves, and insertion rods are fixedly disposed on the support blocks. The two side walls of the positioning blocks, which are arranged axially opposite each other, are provided with slots for insertion and engagement with the insertion rods. A screw is rotatably connected in the sliding groove, and the screw is threadedly connected to the support block. Rotating the screw allows the magnetizing pole arm to slide along the sliding groove to move closer to or away from the magnetic ring.

5. The multi-pole magnetic ring magnetization fixture according to claim 4, characterized in that: One end of the screw extends out of the side wall of the support plate and is fixedly equipped with a gear. The side wall of the support plate is rotatably connected to a gear ring that meshes with multiple gears. Rotating the gear ring can drive multiple gears to rotate synchronously, so that multiple magnetizing pole arms can move synchronously to clamp the magnetic ring.

6. The multi-pole magnetic ring magnetization fixture according to claim 5, characterized in that: Each key on the spline shaft corresponds to a magnetized pole arm, so that when the spline sleeve is fitted onto the spline shaft, the grooves on the two oppositely positioned support plates are positioned opposite each other.

7. The multi-pole magnetic ring magnetization fixture according to claim 6, characterized in that: A retaining ring, which is integrally fixed with the support plate, is provided between the second threaded groove and the sliding chamber to separate the second threaded groove and the sliding chamber. The height of the sliding chamber is higher than the height of the clamping plate.

Images