A magnetic ring direction detection tool

Abstract

The application provides a magnetic ring direction detection tool, and belongs to the technical field of detection. The tool comprises a base, a recess cavity is formed along the thickness direction of the base, a movable body is embedded in the recess cavity and can rotate along the axis direction of the recess cavity, a first mounting part for mounting a measured magnet is arranged on the movable body, and a second mounting part for mounting a known magnetic pole magnet is arranged on the base. According to the principle that different shapes attract each other and the same shape repels each other, the measured magnet rotates in the circumferential direction under the action of the movable body until the measured magnet and the known magnetic pole magnet attract each other, so that the magnetic pole and the magnetic pole pole position of the current measured magnet are distinguished, and the operation is convenient and accurate.

Description

Technical Field

[0001] This invention belongs to the field of detection technology and relates to a tooling for detecting the direction of a magnetic ring. Background Technology

[0002] Currently, most electronic devices incorporate magnets for applications such as magnetic charging, magnetic fixation, and checking for proper sealing. However, during magnet installation, misalignment of the magnetic poles can easily occur, especially with round or ring magnets, where it's difficult to pinpoint the exact location of the poles. In practice, for round or ring magnets, a bar magnet with known poles is typically held close to the magnet being tested, and the location of the poles is roughly determined based on the principle of "opposites attract, like poles repel." However, this method cannot precisely locate the poles, thus hindering accurate installation of the magnet on the product. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a detection tool that can quickly and accurately locate the magnetic poles of a magnet.

[0004] The objective of this invention can be achieved through the following technical solution: a magnetic ring orientation detection fixture, comprising:

[0005] The base has a cavity along its thickness. A movable body that can rotate along the axis of the cavity is embedded in the cavity. A first mounting part for mounting the magnet to be tested is provided on the movable body, and a second mounting part for mounting a known magnetic pole magnet is provided on the base. When the magnet to be tested and the known magnetic pole magnet are placed on the first mounting part and the second mounting part respectively, if the magnetic poles of the magnet to be tested and the known magnetic pole magnet are the same on the opposite side, the repulsive force between them drives the magnet to be tested to rotate by the movable body until the magnetic poles of the magnet to be tested and the known magnetic pole magnet are opposite on the opposite side, thus achieving attraction between them. At this time, the position on the magnet to be tested that attracts the known magnetic pole magnet is the position of the magnetic pole of the magnet to be tested.

[0006] In the aforementioned magnetic ring orientation detection fixture, the movable body includes an outer ring and an inner ring that are concentrically arranged and can rotate relative to each other. The outer ring forms a transition fit with the cavity wall, and the inner ring forms a transition fit with the first mounting part. When the magnet to be tested is mounted on the first mounting part, a transition fit is formed between the magnet to be tested and the first mounting part.

[0007] In the aforementioned magnetic ring orientation detection fixture, a number of balls are arranged between the outer ring and the inner ring, and the sides of the balls are in contact with the outer ring and the inner ring. The relative rotation between the outer ring and the inner ring is achieved by the rotation of the balls.

[0008] In the above-mentioned magnetic ring orientation detection fixture, a protrusion plate is formed on the side of the second mounting part away from the base, extending horizontally in the direction close to the first mounting part. When the magnet to be tested is mounted on the first mounting part, the magnet to be tested is clamped between the protrusion plate and the first mounting part.

[0009] In the above-mentioned magnetic ring orientation detection fixture, the side of the convex plate facing the first mounting part is arranged in an arc shape, and corresponding scale lines are engraved along the edge of the arc. The scale line located at the center of all scale lines is marked as 0°. Based on the 0° scale line, the angle difference between any two adjacent scale lines is 5°. The side of the convex plate facing the first mounting part is located above the inner ring.

[0010] In the above-mentioned magnetic ring orientation detection fixture, the second mounting part includes a boss disposed on the base. The side of the boss facing the first mounting part extends in the direction close to the first mounting part to form a protrusion. The side of the protrusion facing the first mounting part is located between the inner ring and the outer ring. The side of the protrusion facing the first mounting part is arc-shaped, and the arc of the protrusion on this side is consistent with the arc of the side of the protrusion facing the first mounting part on the plate.

[0011] In the above-mentioned magnetic ring orientation detection fixture, a groove is provided on the second mounting part along the thickness direction of the boss. This groove serves as the mounting position for a known magnetic pole magnet. The side of the groove facing the first mounting part is closed, while the side of the groove away from the first mounting part is open.

[0012] In the aforementioned magnetic ring orientation detection fixture, the first mounting part includes a first shaft segment that nests with the inner ring, a second shaft segment that abuts with the inner ring, and a third shaft segment connected to the second shaft segment. The first shaft segment forms a transition fit with the inner ring to achieve synchronous rotation between the inner ring and the first mounting part. The second shaft segment forms abuts with the inner ring and serves as a support for the magnet being tested. The third shaft segment forms a transition fit with the magnet being tested.

[0013] In the above-mentioned magnetic ring direction detection fixture, a through hole is provided along the axial direction of the first mounting part. When the magnet being tested is arranged in a ring shape, the magnet being tested can form a transition fit with the third shaft segment; when the magnet being tested is arranged in a disc shape or a cylindrical shape, the magnet being tested can form a transition fit with the through hole.

[0014] In the aforementioned magnetic ring orientation detection fixture, the through hole sequentially penetrates the first mounting part and the base.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] (1) The magnetic ring direction detection fixture provided by the present invention, based on the principle of attraction between different shapes and repulsion between like poles, makes the magnet under test rotate circumferentially under the action of the moving body until the magnet under test attracts the known magnetic pole magnet, thereby identifying the magnetic pole and magnetic pole point position of the current magnet under test. The operation is convenient and accurate.

[0017] (2) The transition fit between the outer ring and the cavity wall is to fix the moving body in the cavity, but does not affect the circumferential rotation of the inner ring relative to the outer ring; the transition fit between the first mounting part and the inner ring is to achieve synchronous rotation of the inner ring and the first mounting part, and avoid relative rotation; the transition fit between the first mounting part and the magnet under test is to prevent the magnet under test from being "thrown out" when the magnet under test and the known magnetic pole magnet generate a repulsive force, causing the separation between the first mounting part and the magnet under test, thereby improving the reliability of the magnet under test in identifying the magnetic pole and pole position.

[0018] (3) By setting scale lines on the convex plate, the deflection angle of the magnetic pole of the magnet being tested can be accurately calculated. The deflection angle is the angle between the line connecting the magnet being tested and the known magnetic pole magnet and the center of the magnet being tested and the 0° scale line. This makes the installation angle of the magnet being tested more accurate and reliable when adjusting the installation position.

[0019] (4) By setting up a protrusion, the relative distance between the magnet being tested and the known magnetic pole magnet is further reduced, so as to avoid weakening the magnetic field force between the magnet being tested and the known magnetic pole magnet due to the thickness of the protrusion and the relative distance, thereby improving the reliability of the magnetic pole detection and pole position confirmation of the magnet being tested. In addition, the side of the protrusion facing the first mounting part is arc-shaped to match the curvature of the outer edge of the magnet being tested, so as to avoid the magnet being tested from colliding with the protrusion when it rotates under the action of the moving body.

[0020] (5) The groove is set as a semi-open structure with one end closed and the other end open, which facilitates the loading and unloading of known magnetic pole magnets.

[0021] (6) The reason why the base needs to be penetrated synchronously is that when the magnet being tested is a disc or a cylinder, the magnet being tested embedded in the through hole is difficult to remove after testing. After the through hole is penetrated, a tool can be inserted into the end of the through hole away from the first mounting part to strike the magnet being tested nested in the through hole, thereby making it easier to remove the magnet being tested. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a magnetic ring orientation detection fixture according to the present invention.

[0023] Figure 2This is a structural schematic diagram of a magnetic ring orientation detection fixture from another perspective.

[0024] Figure 3 yes Figure 2 The cross-sectional view of AA is shown.

[0025] Figure 4 This is a schematic diagram of the base structure in a preferred embodiment of the present invention.

[0026] In the figure, 100 is the base; 110 is the cavity; 120 is the second mounting part; 121 is the protruding plate; 122 is the scale line; 123 is the boss; 124 is the protrusion; 125 is the groove; 130 is the base; 131 is the first mounting cavity; 140 is the end cap; 141 is the second mounting cavity; 200 is the movable body; 210 is the first mounting part; 211 is the first shaft segment; 212 is the second shaft segment; 213 is the third shaft segment; 214 is the through hole; 220 is the outer ring; 230 is the inner ring; and 240 is the ball bearing. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] like Figures 1 to 4 As shown, the present invention provides a magnetic ring orientation detection fixture, comprising: a base 100, a cavity 110 formed along the thickness direction of the base 100, wherein a movable body 200 rotatable along the axis of the cavity 110 is embedded in the cavity 110, a first mounting part 210 for mounting a magnet to be tested is provided on the movable body 200, and a second mounting part 120 for mounting a known magnetic pole magnet is provided on the base 100. When the magnet to be tested and the known magnetic pole magnet are respectively placed on the first mounting part 210 and the second mounting part 120, if the magnetic poles of the magnet to be tested and the known magnetic pole magnet are the same on opposite sides, the "repulsive force" between them drives the magnet to be tested to rotate by the movable body 200 until the magnetic poles of the magnet to be tested and the known magnetic pole magnet are opposite on opposite sides, thus achieving attraction between them. At this time, the position on the magnet to be tested that attracts the known magnetic pole magnet is the position of the magnetic pole of the magnet to be tested.

[0030] The present invention provides a magnetic ring orientation detection fixture, which, based on the principle of attraction between opposite shapes and repulsion between like poles, causes the magnet under test to rotate circumferentially under the action of the movable body 200 until the magnet under test attracts a known magnetic pole magnet, thereby identifying the magnetic pole and the position of the magnetic pole point of the current magnet under test. The operation is convenient and accurate.

[0031] Preferably, the movable body 200 includes an outer ring 220 and an inner ring 230 that are concentrically arranged and rotatable relative to each other. The outer ring 220 forms a transition fit with the cavity wall of the cavity 110, and the inner ring 230 forms a transition fit with the first mounting part 210. When the magnet to be tested is mounted on the first mounting part 210, a transition fit is formed between the magnet to be tested and the first mounting part 210.

[0032] In this embodiment, the transition fit between the outer ring 220 and the cavity wall of the cavity 110 is to fix the movable body 200 in the cavity 110, but does not affect the circumferential rotation of the inner ring 230 relative to the outer ring 220; the transition fit between the first mounting part 210 and the inner ring 230 is to achieve synchronous rotation of the inner ring 230 and the first mounting part 210, and avoid relative rotation between them; the transition fit between the first mounting part 210 and the magnet under test is to prevent the magnet under test from being "thrown out" by the circumferential rotation of the inner ring 230 and the first mounting part 210 when a repulsive force is generated between the magnet under test and a known magnetic pole magnet, thereby improving the reliability of the magnet under test in identifying the magnetic pole and pole position.

[0033] More preferably, a plurality of balls 240 are provided between the outer ring 220 and the inner ring 230, and the sides of the balls 240 are in contact with the outer ring 220 and the inner ring 230, so that the relative rotation between the outer ring 220 and the inner ring 230 is achieved by the rotation of the balls 240.

[0034] It is worth mentioning that the outer ring 220, the ball bearing 240 and the inner ring 230 are spliced ​​together to form a single piece, and the outer ring 220 and the inner ring 230 are rotated relative to each other through the ball bearing 240, thereby reducing the friction between the two during the relative rotation process and extending the service life of the moving part 200.

[0035] Preferably, a protruding plate 121 is formed on the side of the second mounting part 120 away from the base 100, extending horizontally in the direction close to the first mounting part 210. When the magnet to be tested is mounted on the first mounting part 210, the magnet to be tested is clamped between the protruding plate 121 and the first mounting part 210, thereby limiting the degree of freedom of the magnet to be tested in the direction of the axis of the cavity 110, avoiding the phenomenon of "throwing out" when the movable body 200 drives the magnet to be tested to rotate, thereby improving the reliability of the magnet to be tested when detecting the position of the magnetic pole.

[0036] More preferably, the side of the protruding plate 121 facing the first mounting portion 210 is arc-shaped, and corresponding scale lines 122 are engraved along the edge of the arc. The scale line 122 located at the center of all scale lines 122 is marked as 0°. Based on the 0° scale line 122, the angle difference between any two adjacent scale lines 122 is 5°. The side of the protruding plate 121 facing the first mounting portion 210 is located above the inner ring 230.

[0037] In this embodiment, by setting a scale line 122 on the convex plate 121, the deflection angle of the magnetic pole of the magnet under test can be accurately calculated. The deflection angle is the angle between the line connecting the attraction position between the magnet under test and the known magnetic pole magnet and the position of the center of the magnet under test and the 0° scale line 122. This makes the installation angle of the magnet under test more accurate and reliable when adjusting the installation position.

[0038] Preferably, the second mounting portion 120 includes a boss 123 disposed on the base 100. A protrusion 124 is formed on the side of the boss 123 facing the first mounting portion 210 in a direction close to the first mounting portion 210. The side of the protrusion 124 facing the first mounting portion 210 is located between the inner ring 230 and the outer ring 220. The side of the protrusion 124 facing the first mounting portion 210 is arc-shaped, and the arc of this side of the protrusion 124 is consistent with the arc of the side of the protrusion plate 121 facing the first mounting portion 210.

[0039] In this embodiment, by setting the protrusion 124, the relative distance between the magnet under test and the known magnetic pole magnet is further reduced, avoiding the weakening of the magnetic field force between the magnet under test and the known magnetic pole magnet due to the thickness of the protrusion 123 and the relative distance, thereby improving the reliability of magnetic pole detection and pole position confirmation of the magnet under test. In addition, the side of the protrusion 124 facing the first mounting part 210 is arc-shaped to match the curvature of the outer edge of the magnet under test, avoiding collision between the magnet under test and the protrusion 124 when the magnet under test rotates under the action of the movable body 200.

[0040] It is worth mentioning that the protruding plate 121, protrusion 124 and protrusion 123 are integrally arranged, and the protruding plate 121, protrusion 124 and protrusion 123 are arranged in a stepped manner on the side facing the first mounting part 210. The second mounting part 120 and the base 100 are integrally arranged.

[0041] Preferably, the second mounting portion 120 has a groove 125 along the thickness direction of the boss 123. The groove 125 serves as the mounting position for a known magnetic pole magnet. The side of the groove 125 facing the first mounting portion 210 is closed, and the side of the groove 125 away from the first mounting portion 210 is open.

[0042] It is worth mentioning that the groove 125 is designed as a semi-open structure with one end closed and the other end open, which facilitates the loading and unloading of known magnetic pole magnets.

[0043] Preferably, the first mounting portion 210 includes a first shaft segment 211 that nests with the inner ring 230, a second shaft segment 212 that abuts with the inner ring 230, and a third shaft segment 213 connected to the second shaft segment 212. The first shaft segment 211 and the inner ring 230 form a transition fit to achieve synchronous rotation between the inner ring 230 and the first mounting portion 210. The second shaft segment 212 and the inner ring 230 form abutting fit to serve as a support for the magnet being tested. The third shaft segment 213 and the magnet being tested form a transition fit.

[0044] It is worth mentioning that although the first mounting part 210 is divided into a first shaft segment 211, a second shaft segment 212, and a third shaft segment 213, these three shaft segments can be integrally arranged. A through hole 214 is provided along the axial direction of the first mounting part 210. When the magnet being tested is arranged in a ring shape, it can form a transition fit with the third shaft segment 213 to achieve magnetic pole detection and pole position confirmation. When the magnet being tested is arranged in a disk shape or a cylindrical shape, it can form a transition fit with the through hole 214 to achieve magnetic pole detection and pole position confirmation. This expands the versatility of the testing fixture.

[0045] More preferably, the through hole 214 passes through the first mounting part 210 and the base 100 in sequence.

[0046] It is worth mentioning that the reason why the base 100 needs to be penetrated synchronously is that when the magnet being tested is a disc or a cylinder, the magnet being tested embedded in the through hole 214 is difficult to remove after testing. However, after penetrating the through hole 214, a tool can be inserted into the end of the through hole 214 away from the first mounting part 210 to strike the magnet being tested nested in the through hole 214, thereby facilitating the removal of the magnet being tested.

[0047] Preferably, the base 100 includes a base 130 and an end cap 140 stacked vertically, and the base 130 and the end cap 140 are connected by fasteners. The base 130 has a first mounting cavity 131 along the thickness direction of the base 130, and the end cap 140 has a second mounting cavity 141 along the thickness direction of the end cap 140. The diameter of the first mounting cavity 131 is larger than the diameter of the second mounting cavity 141. The first mounting cavity 131, the second mounting cavity 141 and the through hole 214 are coaxially arranged.

[0048] It is worth mentioning that the first mounting cavity 131 and the second mounting cavity 141 are connected and spliced ​​together to form the aforementioned recessed cavity 110. The base 100 is disassembled into a base 130 and an end cap 140 to facilitate the assembly of the inspection tooling.

[0049] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0051] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A magnetic ring orientation detection fixture, characterized in that, include: The base has a cavity along its thickness direction. A movable body that can rotate along the axis of the cavity is embedded in the cavity. A first mounting part for mounting the magnet to be tested is provided on the movable body, and a second mounting part for mounting a known magnetic pole magnet is provided on the base. When the magnet to be tested and the known magnetic pole magnet are placed on the first mounting part and the second mounting part respectively, if the magnetic poles of the magnet to be tested and the known magnetic pole magnet are the same on the opposite side, the repulsive force between them drives the magnet to be tested to rotate by the movable body until the magnetic poles of the magnet to be tested and the known magnetic pole magnet are opposite on the opposite side, thus achieving attraction between them. At this time, the position on the magnet to be tested that attracts the known magnetic pole magnet is the position of the magnetic pole of the magnet to be tested. The movable body includes an outer ring and an inner ring that are concentrically arranged and can rotate relative to each other. The outer ring forms a transition fit with the cavity wall, and the inner ring forms a transition fit with the first mounting part. When the magnet to be tested is mounted on the first mounting part, the magnet to be tested forms a transition fit with the first mounting part. A protruding plate is formed on the side of the second mounting part that is away from the base and extends horizontally in the direction close to the first mounting part. When the magnet to be tested is mounted on the first mounting part, the magnet to be tested is clamped between the protruding plate and the first mounting part. The side of the convex plate facing the first mounting part is arc-shaped, and corresponding scale lines are engraved along the edge of the arc. The scale line located at the center of all scale lines is marked as 0°. Based on the 0° scale line, the angle difference between any two adjacent scale lines is 5°. The side of the convex plate facing the first mounting part is located above the inner ring. The first mounting part includes a first shaft segment that nests with the inner ring, a second shaft segment that abuts with the inner ring, and a third shaft segment connected to the second shaft segment. The first shaft segment and the inner ring form a transition fit to achieve synchronous rotation between the inner ring and the first mounting part. The second shaft segment and the inner ring form abutting fit to serve as a support for the magnet being tested. The third shaft segment and the magnet being tested form a transition fit.

2. The magnetic ring orientation detection fixture according to claim 1, characterized in that, Several balls are arranged between the outer ring and the inner ring, and the sides of the balls are in contact with the outer ring and the inner ring. The relative rotation between the outer ring and the inner ring is achieved by the rotation of the balls.

3. The magnetic ring orientation detection fixture according to claim 1, characterized in that, The second mounting part includes a boss disposed on the base. A protrusion is formed on the side of the boss facing the first mounting part in a direction close to the first mounting part. The side of the protrusion facing the first mounting part is located between the inner ring and the outer ring. The side of the protrusion facing the first mounting part is arc-shaped, and the arc of the protrusion on this side is consistent with the arc of the side of the protrusion facing the first mounting part on the plate.

4. The magnetic ring orientation detection fixture according to claim 3, characterized in that, The second mounting part has a groove along the thickness direction of the boss. This groove serves as the mounting position for a known magnetic pole magnet. The side of the groove facing the first mounting part is closed, while the side of the groove away from the first mounting part is open.

5. The magnetic ring orientation detection fixture according to claim 1, characterized in that, A through hole is provided along the axial direction of the first mounting part. When the magnet being tested is arranged in a ring shape, the magnet being tested can form a transition fit with the third shaft segment; when the magnet being tested is arranged in a disc shape or a cylindrical shape, the magnet being tested can form a transition fit with the through hole.

6. The magnetic ring orientation detection fixture according to claim 5, characterized in that, The through hole passes through the first mounting part and the base in sequence.

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