Small-sized magnetic shielding barrel performance test tool

Abstract

The utility model discloses a small-sized magnetic shielding barrel performance test tool in the technical field of magnetic shielding performance detection, which comprises a small-sized magnetic shielding barrel base and a plurality of stable supports, the stable supports are fixedly mounted on the small-sized magnetic shielding barrel base, a support cambered surface is arranged above the stable supports, and the support cambered surface is fixedly mounted on the small-sized magnetic shielding barrel base. A small magnetic shielding barrel body is arranged on the stable support, a barrel cover is arranged at the end of the small magnetic shielding barrel body, a through hole is formed in the barrel cover, a detection base is arranged in the small magnetic shielding barrel body, and an arc shape is formed between the upper surface and the lower surface of the detection base in the length direction. According to the utility model, the gear is matched with the lead screw, the position of the small tool of the sensor can be moved so as to meet the requirement of different test point spacing, the barrel cover is provided with the hole which can be freely opened, so that the position of the small tool of the sensor can be changed without opening the barrel cover, and the device is simple to operate and convenient to operate. The flexibility is high.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic shielding performance testing technology, specifically, it relates to a tooling for testing the performance of small magnetic shielding barrels. Background Technology

[0002] After the magnetic shielding barrel is manufactured, comprehensive magnetic shielding performance testing is required to ensure it meets design requirements. This testing is not only a crucial part of quality control but also a key step in ensuring the effectiveness of the magnetic shielding barrel in practical applications. Furthermore, the magnetic shielding barrel's performance must be retested before leaving the factory to ensure it still meets usage requirements after assembly. This is because material, structural, or process factors introduced during assembly can affect magnetic shielding performance. Small magnetic shielding barrels differ from large ones; besides the different test points, small magnetic shielding barrels also have a shielding lid due to their shielding performance requirements. Test points are placed every 5cm along the axis of the small magnetic shielding barrel, ranging from 5cm to 65cm from the bottom. Existing testing methods mainly employ the following approaches: Foam substrate method: A foam substrate of a specific height is constructed, with the surface of the substrate precisely aligned with the axis. Small sensor fixtures are placed on the foam to test magnetic shielding performance. This method, by adjusting the foam height, can adapt to the testing needs of different equipment to some extent. Base positioning method: A custom-made base plate is positioned precisely on the axis, with grooves cut every 5cm on the base plate to hold small sensor fixtures. This method eliminates the need for distance measurement when moving the sensor fixtures, simplifying operation and reducing error introduction.

[0003] Using foam to construct the test substrate has several drawbacks. First, when constructing the foam substrate, a measuring tape is needed to determine the appropriate height. However, the fixed size of the foam makes precise control of the measurement points difficult, easily introducing errors. These errors directly affect the positional accuracy of the sensor fixture, leading to inaccurate test results that fail to accurately reflect the performance of the magnetic shielding container. Second, the points on the foam are not fixed; every 5cm movement of the sensor fixture requires remeasurement and adjustment, introducing errors in each test, increasing the workload of operators, and reducing testing efficiency. Third, since the small magnetic shielding container has a lid, its installation is cumbersome, requiring opening the lid to move the points, reducing work efficiency. Furthermore, the low mechanical strength of foam material makes it prone to damage during frequent handling and adjustments, further affecting the stability and repeatability of the test. Using the substrate positioning method also has significant drawbacks. First, the fixed test points in the base plate groove, while meeting the testing requirements of devices with a 5cm test point spacing, necessitate modification or redesign of the fixture if the test spacing is changed, lacking adaptability. Secondly, the substrate positioning method is similar to the foam substrate method. When changing the test point, it is also necessary to open the lid of the small magnetic shielding bucket, which increases the workload of the operator and is not convenient to operate. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a performance testing fixture for a small magnetic shielding barrel. The basic concept of the technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows:

[0005] A performance testing fixture for a small magnetic shielding barrel includes a base and a stabilizing support. Multiple stabilizing supports are fixedly mounted on the base. A supporting arc surface is provided above each stabilizing support. The main body of the small magnetic shielding barrel is mounted on the stabilizing support. A barrel cover with a through hole is provided at one end of the main body. A testing base is installed inside the main body. The upper and lower surfaces of the testing base are arc-shaped along their length, with the radius of the arc equal to the inner wall radius of the small magnetic shielding barrel. A lead screw assembly is mounted on the testing base. The lead screw assembly includes a lead screw support block one, a lead screw support block two, and a transmission lead screw. One end of the testing base is fixed... A lead screw support block 1 is fixedly installed at one end, and a lead screw support block 2 is installed at the other end. A transmission lead screw is installed between the lead screw support block 1 and the lead screw support block 2. Guide rails are arranged parallel to each other on both sides of the transmission lead screw. A slider is installed on the transmission lead screw between the lead screw support block 1 and the lead screw support block 2. An adapter block is installed on the slider. A small sensor fixture is installed above the adapter block. A rocker assembly is installed on the outside of the lead screw support block 2. A gear 2 is installed at the output end of the rocker assembly. A gear 1 is meshed below the gear 2. The gear 1 is fixedly installed at the end of the transmission lead screw near the lead screw support block 2. The rocker assembly is used to provide power support for the rotation of the transmission lead screw.

[0006] As a further embodiment of this utility model: four threaded holes are provided on the detection base near both ends. The lead screw support block is fixedly installed at the rear end of the detection base by screws, and is flush with the rear end face of the detection base. After the barrel is placed in, the sum of the center thickness of the lead screw support block and the sensor tooling is exactly 5cm, which is the initial point for testing the small magnetic shielding barrel.

[0007] As a further improvement of this utility model: two through slots are provided on the middle two sides of the detection base, and a U-shaped slot is provided on one end of the detection base near the rocker assembly. The through slots are mainly used to facilitate lifting the detection base, and the U-shaped slot is mainly used for the wiring of the single-axis fluxgate.

[0008] As a further embodiment of this utility model: a gear assembly is fixedly installed on the second lead screw support block. The gear assembly consists of the first gear, the second gear, a gear support block, and a gear shaft. The gear support block is fixed on the second lead screw support block, and the second gear is mounted on the gear shaft. A retaining ring is provided at the thin end of the gear shaft, so that the gear shaft will not move left or right on the gear support block. When the gear shaft rotates, the second gear rotates synchronously, and at the same time, the second gear drives the first gear to rotate. Thus, the gear shaft can drive the transmission lead screw to rotate.

[0009] As a further embodiment of this utility model: the rocker assembly consists of a hand crank, a handle turntable, a handle shaft, and a position indicator. The hand crank is detachable from the gear shaft. The handle turntable is connected to the hand crank shaft, and the handle shaft is connected to the handle turntable. The position indicator is mounted on the hand crank, and its bearing rotates with the hand crank. Its outer frame is relatively stationary. The handle shaft has a certain distance from the center of the circle to facilitate rotation.

[0010] As a further improvement of this utility model: bearings are provided at the mating positions of the transmission screw and the screw support block one and the screw support block two; a pin hole is provided on the adapter block every 20mm; the sensor fixture can move left and right on it, and can test data at different positions inside the barrel.

[0011] As a further improvement of this utility model, a limit block is fixedly installed on the detection base by screws to ensure that the slider will not exceed its stroke during the rotation of the lead screw and thus not damage the barrel.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0013] This invention uses gears and lead screws to move the position of the sensor fixture, thereby meeting the needs of different test point spacings. The lid has a freely openable hole, which allows the position of the sensor fixture to be changed without opening the lid. The device is simple to operate and highly flexible.

[0014] This invention utilizes gears to transmit kinetic energy to a lead screw, avoiding displacement or loosening caused by external forces, thus improving the accuracy of test results. The device has a simple structure, low manufacturing cost, and is easy to maintain. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the application of this utility model in a tooling for a small magnetic shielding barrel.

[0016] Figure 2 This is an overall structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the gear assembly of this utility model;

[0018] Figure 4 This is a cross-sectional view of the gear assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the hand-cranked component of this utility model;

[0020] Figure 6 This is a cross-sectional view of the hand crank of this utility model.

[0021] In the diagram: 101, main body of the small magnetic shielding barrel; 102, base of the small magnetic shielding barrel; 201, detection base; 202, limit block; 300, lead screw assembly; 301, lead screw support block one; 302, lead screw support block two; 303, slider; 304, guide rail; 305, transmission lead screw; 306, adapter block; 307, bearing; 400, gear assembly; 401, gear support block; 402, gear shaft; 403, gear two; 404, gear one; 500, rocker assembly; 501, hand crank; 502, position indicator; 503, handle turntable; 504, handle shaft; 601, sensor fixture. Detailed Implementation

[0022] like Figures 1 to 6 As shown, the performance testing fixture for a small magnetic shielding barrel includes a base 102 and a stabilizing support. Multiple stabilizing supports are fixedly mounted on the base 102. A supporting arc surface is provided above each stabilizing support. The main body 101 of the small magnetic shielding barrel is mounted on the stabilizing support. A barrel cover with a through hole is located at one end of the main body 101. A testing base 201 is installed inside the main body 101. The upper and lower surfaces of the testing base 201 are arc-shaped along their length, with the radius equal to the inner wall radius of the small magnetic shielding barrel. A lead screw assembly 300 is mounted on the testing base 201. The lead screw assembly 300 includes a lead screw support block 301, a second lead screw support block 302, and a transmission lead screw 305. A lead screw support block is fixedly mounted at one end of the testing base 201. A lead screw support block 301 is provided at one end and a lead screw support block 2 302 is provided at the other end. A transmission lead screw 305 is installed between the lead screw support block 301 and the lead screw support block 2 302. Guide rails 304 are arranged parallel to each other on both sides of the transmission lead screw 305. A slider 303 is provided on the transmission lead screw 305 between the lead screw support block 301 and the lead screw support block 2 302. A transition block 306 is provided on the slider 303. A sensor fixture 601 is provided above the transition block 306. A rocker assembly 500 is provided on the outside of the lead screw support block 2 302. A gear 2 403 is provided at the output end of the rocker assembly 500. A gear 1 404 is meshed below the gear 2 403. The gear 1 404 is fixedly installed on the end of the transmission lead screw 305 near the lead screw support block 2 302. The rocker assembly 500 is used to provide power support for the rotation of the transmission lead screw 305.

[0023] The detection base 201 has four threaded holes near both ends. The lead screw support block 301 is fixedly installed at the rear end of the detection base 201 with screws, and is flush with the rear end face of the detection base 201. After the barrel is placed in, the sum of the center thickness of the lead screw support block 301 and the sensor tool 601 is exactly 5cm, which is the initial point for testing the small magnetic shielding barrel.

[0024] The detection base 201 has two through slots located on the middle two sides. The detection base 201 has a U-shaped through slot at the end near the rocker assembly 500. The main function is to facilitate lifting the detection base 201. The U-shaped slot is mainly used for the wiring of the single-axis fluxgate.

[0025] A gear assembly 400 is fixedly mounted on the lead screw support block 302. The gear assembly 400 consists of a first gear 404, a second gear 403, a gear support block 401, and a gear shaft 402. The gear support block 401 is fixed on the lead screw support block 302, and the second gear 403 is mounted on the gear shaft 402. A retaining ring is set at the thin end of the gear shaft 402, so that the gear shaft 402 will not move left or right on the gear support block 401. When the gear shaft 402 rotates, the second gear 403 rotates synchronously. At the same time, the second gear 403 drives the first gear 404 to rotate, so that the gear shaft 402 can drive the transmission lead screw 10 to rotate.

[0026] The joystick assembly 500 consists of a hand crank 501, a handle turntable 503, a handle shaft 504, and a position indicator 502. The hand crank 501 is detachable from the gear shaft 402. The handle turntable 503 is connected to the shaft of the hand crank 501, and the handle shaft 504 is connected to the handle turntable 503. The position indicator 502 is mounted on the hand crank 501, and its bearing rotates with the hand crank 501. Its outer frame is relatively stationary. The handle shaft 504 has a certain distance from the center of the circle to facilitate rotation.

[0027] Bearings 307 are provided at the mating positions of the transmission screw 305, screw support block 1 301, and screw support block 2 302. A pin hole is provided on the adapter block 306 every 20mm. The sensor fixture 601 can move left and right on it to test data at different positions inside the barrel.

[0028] A limit block 202 is fixedly installed on the detection base 201 by screws to ensure that the slider 303 will not exceed the stroke during the rotation of the lead screw and cause damage to the barrel.

[0029] The working principle of this utility model is as follows: Since the center position of the sensor fixture 601 must be on the axis, the position of the lead screw must be lower than the axis. However, the center of the hole on the magnetic shielding barrel lid is located on the axis. Simply using the lead screw cannot achieve the goal of rotating the lead screw to push the sensor fixture 601 forward and backward inside the barrel from outside the barrel. Therefore, a gear assembly 400 is provided for the lead screw. The lead screw and the gear shaft 402 each have a gear. The axis of the gear shaft 402 and the center of the sensor fixture 601 are on the same straight line. When the gear shaft 402 rotates... When the gears on the gear shaft 402 rotate synchronously, they drive the gears on the lead screw to rotate, which in turn drives the lead screw to rotate. The detachable hand crank 501 can not only allow the lead screw to be rotated outside the barrel without frequently opening and closing the magnetic shielding barrel lid, but also allows the hand crank 501 to be disassembled during testing and plugged back into the hole in the barrel lid with a rubber stopper to improve the magnetic shielding performance. At the same time, a bevel is designed at the connection between the hand crank 501 and the gear shaft 402 to make it easier for the tester to install the detachable hand crank 501 onto the gear shaft 402.

[0030] Through the ingenious cooperation between the lead screw and the gear, the rotating shaft was successfully moved upward, so that the gear shaft 402 and the sensor tool 601 were both on the axis of the magnetic shielding barrel. This facilitates the rotation of the gear shaft 402 outside the barrel, thereby driving the rotation of the lead screw. To improve the performance of the magnetic shielding barrel, a detachable hand crank 501 was added to the gear shaft 402. When the position needs to be adjusted, the hand crank 501 is inserted into the gear shaft 402. When the performance needs to be tested, the hand crank 501 is removed and a rubber stopper is inserted. The use of the lead screw, gear, and hand crank 501 greatly improves the flexibility and convenience of testing.

[0031] Rotating the lead screw allows the sensor fixture 601 to move any distance within the barrel and then be fixed. Compared to the fixed 5cm test distance on the base, this supports various spacing requirements. Testers can flexibly adjust the position of the sensor fixture 601 by rotating the lead screw according to actual test needs, thereby enabling performance testing of different areas of the magnetic shielding barrel. This solves the problems of fixed spacing and insufficient flexibility in existing technologies. The lead screw support block 301 is 2.5cm thick, and the thickness of the sensor fixture 601 from its center to its bottom edge is also 2.5cm. When the slider 303 contacts the lead screw support block 301 at the bottom of the barrel, the distance from the bottom of the barrel is exactly 5cm. This high-stability design effectively avoids the fixture from shaking or shifting during the test. The lead screw has high precision with a pitch of 4mm, improving the accuracy and reliability of the test results.

[0032] In summary, this invention, by innovatively combining lead screws and gears, solves the problems of difficult point adjustment, fixed test spacing, and low accuracy in the prior art, while significantly improving the flexibility, convenience, efficiency, and accuracy of testing;

[0033] Since it is considered that it may not only be necessary to test the position data of the barrel axis, but also the up, down, left and right positions, an adapter block 306 is added to the slider 303. A pin hole is set every 20mm in the adapter block 306, and the sensor tool 601 can move left and right on it. At the same time, by changing the thickness of the adapter block 306, the sensor tool 601 can move up and down.

[0034] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above, but only as further supplements or optimizations; the performance testing fixture for the small magnetic shielding barrel includes: a support. When the radius of the arc between the upper and lower surfaces of the test base 201 is smaller than the diameter of the small magnetic shielding barrel, it is not necessary to change the size of the base. Only a support needs to be customized to support the base to a specific height. The support structure is not limited, as long as it can meet the support requirements.

[0035] This utility model has a reasonable structural design and is easy to install and use. It uses gears and a lead screw to move the position of the sensor fixture 601, thereby meeting the needs of different test point spacings. The bucket lid has a freely opening hole, which allows the position of the sensor fixture 601 to be changed without opening the bucket lid. The device is simple to operate and highly flexible. The gears transmit kinetic energy to the lead screw, avoiding displacement or loosening caused by external forces, thus improving the accuracy of test results. The device has a simple structure, low manufacturing cost, and is easy to maintain.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A performance testing fixture for a small magnetic shielding barrel, comprising a small magnetic shielding barrel base (102) and a stable support, characterized in that, A stabilizing support is fixedly installed on a small magnetic shielding barrel base (102). Multiple stabilizing supports are arranged in a row. A supporting arc surface is provided on the top of the stabilizing support. A small magnetic shielding barrel body (101) is provided on the stabilizing support. A barrel cover is provided at the end of the small magnetic shielding barrel body (101). A through hole is provided on the barrel cover. A detection base (201) is provided inside the small magnetic shielding barrel body (101). The upper and lower surfaces of the detection base (201) in the length direction are arc-shaped. The radius of the circle is equal to the inner wall radius of the small magnetic shielding barrel body (101). A lead screw assembly (300) is provided on the detection base (201). The lead screw assembly (300) includes a lead screw support block one (301), a lead screw support block two (302), and a transmission lead screw (305). A lead screw support block one (301) is fixedly provided at one end of the detection base (201), and a lead screw support block two (302) is provided at the other end. Block 2 (302), a transmission screw (305) is installed between the first screw support block (301) and the second screw support block (302). Guide rails (304) are arranged parallel to each other on both sides of the transmission screw (305). A slider (303) is provided on the transmission screw (305) between the first screw support block (301) and the second screw support block (302). A transition block (306) is provided on the slider (303). A sensor fixture (601) is provided above the adapter block (306). A rocker assembly (500) is provided on the outside of the second lead screw support block (302). A gear two (403) is provided at the output end of the rocker assembly (500). A gear one (404) is meshed below the gear two (403). The gear one (404) is fixedly installed on one end of the transmission lead screw (305) near the second lead screw support block (302).

2. The performance testing fixture for the small magnetic shielding barrel according to claim 1, characterized in that, The detection base (201) has four threaded holes near both ends. The lead screw support block (301) is fixedly installed at the rear end of the detection base (201) by screws, and is flush with the rear end face of the detection base (201). After being placed in the barrel, the sum of the center thickness of the lead screw support block (301) and the sensor fixture (601) is exactly 5cm.

3. The performance testing fixture for the small magnetic shielding barrel according to claim 2, characterized in that, The detection base (201) has two through slots located on the middle two sides, and a U-shaped slot is provided on one end of the detection base (201) near the rocker assembly (500).

4. The performance testing fixture for the small magnetic shielding barrel according to claim 3, characterized in that, A gear assembly (400) is fixedly installed on the second lead screw support block (302). The gear assembly (400) consists of the first gear (404), the second gear (403), the gear support block (401), and the gear shaft (402). The gear support block (401) is fixed on the second lead screw support block (302), and the second gear (403) is installed on the gear shaft (402). A retaining ring is provided at the thin end of the gear shaft (402), so that the gear shaft (402) will not move left or right on the gear support block (401).

5. The performance testing fixture for the small magnetic shielding barrel according to claim 4, characterized in that, The rocker assembly (500) consists of a hand crank (501), a handle dial (503), a handle shaft (504), and a position indicator (502). The hand crank (501) is detachable from the gear shaft (402). The handle dial (503) is connected to the hand crank (501) shaft, and the handle shaft (504) is connected to the handle dial (503). The position indicator (502) is mounted on the hand crank (501).

6. The performance testing fixture for the small magnetic shielding barrel according to claim 5, characterized in that, The transmission screw (305) is equipped with bearings (307) at the mating positions with the screw support block one (301) and the screw support block two (302). A pin hole is provided on the adapter block (306) every 20mm. The sensor fixture (601) is used to adjust the left and right positions on it.

7. The performance testing fixture for the small magnetic shielding barrel according to claim 6, characterized in that, A limit block (202) is fixedly installed on the detection base (201) by screws.

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