Device for rapidly detecting magnetic strength of counter bore magnet

Abstract

The utility model relates to a device for rapidly testing the magnetic strength of a counter bore magnet, which comprises a base, the upper surface of the base is provided with a vertically arranged vertical rod, the vertical rod is provided with a horizontally arranged horizontal rod through a cross-shaped fixing clamp, and one end of the horizontal rod far away from the cross-shaped fixing clamp is fixedly provided with a spring scale. A magnet fixing piece is hung at the bottom of the spring scale, a detected magnet is detachably and fixedly mounted on the lower surface of the magnet fixing piece, a soft magnetic block is arranged below the detected magnet, and the lower surface of the soft magnetic block is in contact with the upper surface of the base; the device further comprises a standard sample block. The counter bore magnet detection device is applied to counter bore magnet detection in industrial production, and can rapidly and visually detect whether the magnetic intensity of the counter bore magnet meets the production requirement or not.

Description

Technical Field

[0001] The utility model relates to a magnetic detection device, in particular to a device for quickly testing the magnetic strength of a countersunk hole magnet, and belongs to the technical field of countersunk hole magnet detection. Background Art

[0002] With the development of the electronics industry and the precision machinery industry, countersunk magnets, as a permanent magnetic material with a central hole, are widely used in motors, sensors, medical devices and other equipment. However, how to quickly and accurately test the magnetic strength of countersunk magnets and determine whether they meet production needs has always been an urgent problem to be solved in the industry. Due to the special structure of countersunk magnets, traditional magnetic testing methods such as Hall effect sensors or flux meters are often difficult to accurately and quickly evaluate the magnetic properties of countersunk magnets. The test results of the above test methods are generally the magnetic field strength of a certain point on the surface of the magnet, which is related to the detection position and the uniformity of the magnetic field. When used, multiple points must be selected for detection and the test results are quantitative magnetic field strength. The test results have no practical significance and are not suitable for inspections required by industrial production.

[0003] For occasions that require frequent inspections in manufacturing, there is a lack of a simple and quick detection method, especially for countersunk hole magnets with countersunk hole designs. Therefore, it is particularly important to develop a device for quickly testing the magnetic strength of countersunk hole magnets designed for countersunk hole magnets. Utility Model Content

[0004] The utility model mainly aims at the above-mentioned problems existing in the prior art and provides a device for quickly testing the magnetic strength of a countersunk hole magnet. The device is applied to the inspection of the countersunk hole magnet in industrial production and can quickly and intuitively test whether the magnetic strength of the countersunk hole magnet meets the production needs.

[0005] The purpose of this utility model is mainly achieved through the following solutions:

[0006] A device for quickly testing the magnetic strength of a countersunk magnet comprises a base, the upper surface of the base is provided with a vertically arranged upright pole, a horizontally arranged horizontal pole is provided on the upright pole via a cross fixing clamp, a spring balance is fixedly provided at one end of the horizontal pole away from the cross fixing clamp, a magnet fixing piece is suspended at the bottom of the spring balance, a magnet to be detected is detachably fixedly provided on the lower surface of the magnet fixing piece, a soft magnetic block is provided below the magnet to be detected, and the lower surface of the soft magnetic block is in contact with the upper surface of the base; the device also comprises a standard sample block.

[0007] Preferably, an S-shaped hook is hung at the bottom of the spring balance, and a soft rope is connected to the center of the upper end of the magnet fixing part, and the soft rope is hung at the bottom of the S-shaped hook.

[0008] Preferably, the soft rope is a thin rope that is not easily deformed and has a diameter of 0.2-0.4 mm.

[0009] Preferably, a threaded hole is provided in the middle of the lower surface of the magnet fixing piece, and a locking bolt is threadedly connected to the threaded hole.

[0010] Preferably, the detected magnet is provided with fixing countersunk holes at the top and bottom, and the locking bolt passes through the fixing countersunk holes to be connected to the magnet fixing piece, and fixes the detected magnet on the lower surface of the magnet fixing piece.

[0011] Preferably, the magnet fixing part, the standard sample block and the locking bolt are all made of non-metallic materials.

[0012] Therefore, compared with the prior art, the utility model has the following advantages:

[0013] (1) The utility model is provided with a vertical pole, a cross fixing clamp, a horizontal pole, a spring scale, an S-shaped hook, a soft rope and a magnet fixing part. The cross fixing clamp is locked on the vertical pole, and the position of the cross fixing clamp on the vertical pole can be moved up and down to adjust the distance between the detected magnet and the soft magnetic block, so that the distance between the detected magnet and the soft magnetic block can be quickly adjusted to the height of the standard sample block. The operation is simple, and the magnetic properties of the detected magnet can be accurately and quickly evaluated to see whether they meet the production requirements;

[0014] (2) The utility model provides a magnet fixing part and a locking bolt. The locking bolt passes through the fixing countersunk hole from the lower end of the detected magnet and is fixedly connected to the magnet fixing part. The magnet fixing part can be quickly disassembled and assembled, thereby improving the detection efficiency. In addition, the magnet fixing part can ensure that the lower surface of the magnet fixing part is parallel to the upper surface of the soft magnetic block, thereby ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 This is a structural schematic diagram of a cross fixing clamp in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the magnet fixing part in the utility model.

[0019] Illustration: 1-base, 2-vertical pole, 3-cross fixing clamp, 4-horizontal pole, 5-spring scale, 6-magnet fixing part, 7-magnet to be tested, 8-soft magnetic block, 9-standard sample block, 10-S-type hook, 11-soft rope, 12-threaded hole, 13-locking bolt, 14-fixing countersunk hole, 15-foot. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0021] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0022] Embodiment 1:

[0023] like Figure 1 , 2 As shown, the utility model provides a technical solution, a device for quickly testing the magnetic strength of a countersunk magnet, comprising a base 1 of a plate-like structure, wherein the four corners of the lower surface of the base 1 are detachably fixedly connected with foot pads 15 by bolts, and the foot pads 15 are made of rubber and have a good supporting effect; a vertically arranged upright pole 2 is installed on the upper surface of the base 1 by bolts, and a horizontally arranged horizontal pole 4 is installed on the upright pole 2 by a cross fixing clamp 3, and the cross fixing clamp 3 is locked on the upright pole 2 and can be adjusted up and down to be located at the upright pole 2 A spring balance 5 is fixedly installed at one end of the horizontal rod 4 away from the cross fixing clamp 3. The upper end of the spring balance 5 can be locked on the horizontal rod 4 by a clamp, a cable tie, etc. A magnet fixing part 6 is hung at the bottom hook of the spring balance 5. A detected magnet 7 is detachably fixedly installed on the lower surface of the magnet fixing part 6, and a soft magnetic block 8 is provided below the detected magnet 7. The lower surface of the soft magnetic block 8 is in contact with the upper surface of the base 1, and the soft magnetic block 8 can be bonded to the upper surface of the base 1. In addition, the device is also equipped with a standard sample block 9.

[0024] like Figure 3 As shown, the present application provides a specific structure of a cross fixing clamp 3, a main body of the cross fixing clamp 3 is provided with horizontal and vertical through holes, one end of the horizontal rod 4 is inserted in the horizontal through hole, the vertical rod 2 is inserted in the vertical through hole, and the side walls of the horizontal through hole and the vertical through hole are both provided with openings, and locking and loosening are achieved by adjusting bolts passing through the through holes, thereby quickly adjusting the position of the cross fixing clamp 3 on the vertical rod 2; however, the cross fixing clamp 3 is not limited to the above structure, as long as the locking and position adjustment of the horizontal rod 4 and the vertical rod 2 can be achieved.

[0025] Embodiment 2:

[0026] like Figure 1 , 2 As shown, the utility model provides another technical solution, a device for quickly testing the magnetic strength of a countersunk magnet, which is different from Example 1 in that an S-shaped hook 10 is hung at the bottom hook of the spring scale 5, and a soft rope 11 is fixedly connected to the center of the upper end of the magnet fixing part 6, and the upper end of the soft rope 11 is suspended at the lower part of the S-shaped hook 10. The arrangement of the S-shaped hook 10 and the soft rope 11 facilitates the removal and hanging of the magnet fixing part 6, and further facilitates the disassembly and assembly of the detected magnet 7.

[0027] The soft rope 11 is a thin rope that is not easily deformed, and its diameter is 0.2-0.4 mm, preferably 0.3 mm. The soft rope 11 can achieve the free falling of the detected magnet 7.

[0028] Embodiment 3:

[0029] like Figure 1 , 4 As shown, the utility model provides another technical solution, a device for quickly testing the magnetic strength of a countersunk magnet. The difference from Example 1 is that a threaded hole 12 is provided in the middle of the lower surface of the magnet fixing part 6, and a locking bolt 13 is threadedly connected to the threaded hole 12.

[0030] Specifically, the magnet fixing part 6 adopts an integrated structure with a cone at the upper end and a cylinder at the lower end. This structure can ensure that the detected magnet 7 is subjected to a certain suction force when it approaches the soft magnetic block 8, and can ensure that it remains parallel to the soft magnetic block 8 even if the magnetism is uneven.

[0031] Specifically, a fixing countersunk hole 14 is provided through the upper and lower parts of the detected magnet 7, the upper end of the fixing countersunk hole 14 is a circular hole, and the lower end is a truncated cone-shaped hole. The locking bolt 13 passes through the fixing countersunk hole 14 and is threadedly connected to the threaded hole 12 of the magnet fixing part 6, and fixes the detected magnet 7 to the lower surface of the magnet fixing part 6. The position on the locking bolt 13 that contacts the truncated cone-shaped hole can be provided with a protrusion that is compatible with the truncated cone-shaped hole to ensure accurate and rapid positioning of the detected magnet 7.

[0032] Specifically, the magnet fixing part 6, the standard sample block 9, the locking bolt 13 and the base 1 are all made of non-metallic materials to avoid interference with the test results.

[0033] In the present application, the soft magnetic block 8 is made of a magnetic material that can be rapidly magnetized and rapidly disappear, such as carbon steel. Soft magnetism is a magnetic material that can be rapidly magnetized under the action of an external magnetic field, and whose magnetization intensity and direction rapidly disappear after the external magnetic field is removed. The principle of the device is as follows: the detected magnet 7 is brought close to the soft magnetic block 8, and the magnetic strength of the detected magnet 7 is detected through the interaction between them. If the detected magnet 7 can firmly attract the soft magnetic block 8 and has a certain suction force, then it means that the magnetic strength of the detected magnet 7 is relatively high, otherwise it is relatively low. In addition, the countersunk magnets used in this industrial production do not need to quantitatively and accurately measure the magnetic field strength, but only need to check whether the magnet (magnetic strength) meets the production needs.

[0034] The utility model provides a device for quickly testing the magnetic strength of a countersunk hole magnet, and the method of using the device is as follows: 1. It is known that the magnetic property of a countersunk hole magnet is at a distance from a soft magnetic block 8 equal to the height of a standard sample block 9, which meets certain production needs, and at a critical point, the reading of a spring scale 5 is A (gram), and the above height can be obtained through multiple tests; 2. When testing a batch of the above countersunk hole magnets, first place the standard sample block 9 between the soft magnetic block 8 and the magnet 7 to be tested, and adjust the height of the magnet 7 to be tested by a cross fixing clamp 3, so that the distance between the magnet 7 to be tested and the soft magnetic block 8 is equal to the height of the standard sample block 9, and then read the spring scale 5. If the reading of the spring scale 5 is ≥A (gram), it can be determined that the magnet to be tested meets the requirements for use, and if the reading of the spring scale 5 is <A (gram), it can be determined that the magnet to be tested does not meet the requirements for use.

[0035] The utility model provides a device for quickly testing the magnetic strength of a countersunk magnet. The device comprises a vertical pole, a cross fixing clamp, a horizontal pole, a spring scale, an S-shaped hook, a soft rope and a magnet fixing part. The cross fixing clamp is locked on the vertical pole, and the position of the cross fixing clamp on the vertical pole can be moved up and down to adjust the distance between the detected magnet and the soft magnetic block, so that the distance between the detected magnet and the soft magnetic block can be quickly adjusted to the height of the standard sample block. The utility model is simple to operate and can accurately and quickly evaluate whether the magnetic properties of the detected magnet meet the production needs. The magnet fixing part and the locking bolt are arranged. The locking bolt passes through the fixed countersunk hole from the lower end of the detected magnet and is fixedly connected to the magnet fixing part. The magnet fixing part can be quickly disassembled and assembled, thereby improving the detection efficiency. Moreover, the magnet fixing part can ensure that the lower surface of the magnet fixing part is parallel to the upper surface of the soft magnetic block, thereby ensuring the accuracy of the measurement result.

[0036] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A device for quickly testing the magnetic strength of a countersunk magnet, characterized by: The device comprises a base (1), the upper surface of the base (1) being mounted with a vertically arranged upright pole (2), the upright pole (2) being mounted with a horizontally arranged horizontal pole (4) via a cross fixing clamp (3), a spring balance (5) being fixedly mounted on one end of the horizontal pole (4) away from the cross fixing clamp (3), a magnet fixing part (6) being suspended at the bottom of the spring balance (5), a detected magnet (7) being detachably fixedly mounted on the lower surface of the magnet fixing part (6), a soft magnetic block (8) being arranged below the detected magnet (7), the lower surface of the soft magnetic block (8) being in contact with the upper surface of the base (1); the device further comprises a standard sample block (9).

2. A device for quickly testing the magnetic strength of a countersunk magnet according to claim 1, characterized in that: An S-shaped hook (10) is suspended at the bottom of the spring balance (5), and a soft rope (11) is connected to the center of the upper end of the magnet fixing member (6), and the soft rope (11) is suspended at the bottom of the S-shaped hook (10).

3. A device for quickly testing the magnetic strength of a countersunk magnet according to claim 2, characterized in that: The soft rope (11) is a thin rope that is not easily deformed and has a diameter of 0.2-0.4 mm.

4. The device for quickly testing the magnetic strength of a countersunk magnet according to claim 1, characterized in that: A threaded hole (12) is provided in the middle of the lower surface of the magnet fixing member (6), and a locking bolt (13) is threadedly connected to the threaded hole (12).

5. A device for quickly testing the magnetic strength of a countersunk magnet according to claim 4, characterized in that: The detected magnet (7) is provided with fixing countersunk holes (14) extending through the upper and lower parts thereof, and the locking bolt (13) passes through the fixing countersunk holes (14) to be connected to the magnet fixing member (6), thereby fixing the detected magnet (7) on the lower surface of the magnet fixing member (6).

6. A device for quickly testing the magnetic strength of a countersunk magnet according to claim 5, characterized in that: The magnet fixing member (6), the standard sample block (9) and the locking bolt (13) are all made of non-metallic materials.

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