Capacitor noise test box

Abstract

The utility model discloses a capacitor noise test box which comprises a box body, a box door hinged to the side wall of the box body, an adjusting assembly arranged at the top of an inner cavity of the box body, a sound receiver arranged at the top of the inner cavity of the box body, and a plurality of vibration reduction assemblies arranged at the bottom of the box body. A motor is turned on to drive a rotating shaft to rotate, so that a winding roller drives a pull rope to wind, then the position of a moving seat is adjusted, noise attenuation data of the capacitor changing along with the distance is conveniently tested, an electric push rod is turned on to drive a connecting plate to move, a clamping block moves to clamp a gear, locking is facilitated, and the capacitor is prevented from sliding down; the box body drives the supporting block to vibrate, buffering and vibration reduction are facilitated through the vibration reduction assembly, and the influence of a sound source caused by external environment vibration on a noise test result is conveniently reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of noise testing boxes, specifically a capacitor noise testing box. Background Technology

[0002] A capacitor is formed by two conductors close to each other with a non-conductive insulating medium sandwiched in between. Capacitors play an important role in circuits such as tuning, bypassing, coupling, and filtering. A soundproof box (noise test box) is a small, silent space that has undergone sound absorption treatment. Small products such as motors, audio equipment, transformers, and ballasts can be tested inside it.

[0003] The prior art patent document with publication number CN212432332U provides a noise testing box for a geared motor, including a testing box. Multiple sets of tests can be performed to comprehensively process multiple sets of data, avoiding errors caused by single measurements and improving measurement accuracy. Combining noise measurements from a first and second microphone allows for data on different noises generated in both solid and air media, facilitating targeted noise improvement later to achieve better NVH (Noise, Vibration, and Harshness). A limiting plate, made of silicone material, can limit the position of the cover plate, providing good sealing. Rotating a rotating block clamps the fixed plate and the motor mounting plate, thus fixing the structure of the motor mounting plate and the motor. After testing, rotating the rotating block in the opposite direction separates the fixed plate and the motor mounting plate, allowing for testing with different motors. The disassembly and assembly structure is reliable, operation is convenient, and it has strong practicality.

[0004] Although the device has many beneficial effects, it still has the following problems: During the use of the device, the test platform is in a fixed position, which makes it inconvenient to test the noise attenuation data of the capacitor as the distance changes; secondly, the test box is in direct contact with the ground during the use of the device, which can easily cause the sound source caused by the vibration of the external environment to affect the noise test results, which needs to be improved. In view of this, we propose a capacitor noise test box. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the issues mentioned above, such as the fixed position of the test platform making it inconvenient to test the noise attenuation data of the capacitor as it changes with distance, and the direct contact of the test box with the ground making it easy for sound sources caused by external environmental vibrations to affect the noise test results, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a capacitor noise test box that facilitates the adjustment of the distance between the movable base and the receiver, makes it convenient to test the noise attenuation data of the capacitor as the distance changes, facilitates vibration reduction, and reduces the influence of sound sources caused by external environmental vibrations on the noise test results.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A capacitor noise testing chamber includes a chamber body with a door hinged to its side wall. An adjustment assembly is located at the top of the chamber's inner cavity. The adjustment assembly includes a fixing block, a fixing box at the bottom of the fixing block, a motor on the side wall of the fixing box, a rotating shaft at the motor's output end, winding rollers on both sides of the rotating shaft's outer circumference, pull ropes on the outer circumference of each of the two winding rollers, and movable seats at the bottom of each pull rope. A gear is located on the outer circumference of the rotating shaft. An electric push rod is located at the bottom of the fixing box's inner cavity, a connecting plate at the output end of the electric push rod, a locking block at the top of the connecting plate's side wall, a microphone at the top of the chamber's inner cavity, and multiple vibration damping components at the bottom of the chamber body. The diameters at both ends of the winding rollers are larger than the diameter in the middle of the winding rollers, facilitating the limiting of the pull ropes and preventing them from slipping off.

[0012] In a preferred embodiment of the capacitor noise testing chamber of this utility model, the vibration damping assembly includes a fixed base. Multiple damping spring vibration dampers are provided at the bottom of the inner cavity of the fixed base. A support block is provided at the top of each damping spring vibration damper. Multiple rotating grooves are formed on both side walls of the support block, and ball bearings are rotatably connected to the inner circumference of each of the rotating grooves. The ball bearings roll along the side walls of the inner cavity of the fixed base, preventing friction between the support block and the side walls of the inner cavity from generating noise and thus preventing interference with the noise test.

[0013] In a preferred embodiment of the capacitor noise test box of this utility model, the rotating shaft is rotatably connected to the inner cavity side wall of the box, and the size and position of the gear match the size and position of the locking block.

[0014] As a preferred embodiment of the capacitor noise test box of this utility model, the movable seat has limit grooves on both side walls, and the bottom of the inner cavity of the box is provided with two limit rods.

[0015] In a preferred embodiment of the capacitor noise test box of this utility model, the top opening of the movable seat faces upward, and the size and position of the limiting groove match the size and position of the limiting rod.

[0016] In a preferred embodiment of the capacitor noise test box of this utility model, the diameter of the opening of the rotating groove is smaller than the diameter of the ball bearing, and the ball bearing is rotatably connected to the inner wall of the fixed seat cavity.

[0017] In a preferred embodiment of the capacitor noise testing box of this utility model, the inner wall of the box is provided with a sound insulation board, the material of which is polyester fiber sound-absorbing cotton. The corrugated sound insulation board facilitates noise refraction, reduces noise propagation, and further improves the sound insulation effect.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This capacitor noise test chamber places the capacitor on top of the movable base and conducts noise testing through a microphone. By turning on the motor to drive the rotating shaft, the winding roller drives the pull rope to wind up, thereby adjusting the position of the movable base to facilitate testing the noise attenuation data of the capacitor as the distance changes. By turning on the electric push rod to move the connecting plate, the locking block moves and engages with the gear, which is convenient for locking and prevents the capacitor from slipping.

[0021] This type of capacitor noise test chamber uses a support block to support the chamber body. When the external environment vibrates, the chamber body drives the support block to vibrate. Multiple damping springs are used to buffer and reduce vibration, which helps to reduce the impact of external environmental vibrations on the noise test results. The ball bearings roll along the inner wall of the fixed seat, which makes the reset and movement of the support block more stable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a capacitor noise testing box according to the present invention;

[0024] Figure 2 This is a schematic diagram of the adjustment component structure of a capacitor noise test box according to the present invention;

[0025] Figure 3This is a structural breakdown diagram of the adjustment component of a capacitor noise test box according to the present invention;

[0026] Figure 4 This is a schematic diagram of the movable base structure of a capacitor noise test box according to the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of the vibration damping component structure of a capacitor noise testing box according to this utility model.

[0028] The following are the labeling instructions in the diagram: 1. Enclosure; 2. Enclosure door; 3. Adjustment assembly; 4. Microphone; 5. Vibration damping assembly; 6. Sound insulation board; 7. Sealing plate; 301. Fixing block; 302. Fixing box; 303. Motor; 304. Rotary groove; 305. Take-up roller; 306. Pull rope; 307. Moving seat; 308. Gear; 309. Electric push rod; 310. Connecting plate; 311. Locking block; 312. Limiting groove; 313. Limiting rod; 501. Fixing seat; 502. Damping spring vibration damper; 503. Support block; 504. Rotary groove; 505. Ball bearing. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides an overall structural schematic diagram of an embodiment of a capacitor noise testing box, including:

[0035] Please see Figures 1-5 This embodiment of a capacitor noise testing box includes a box body 1, with a door 2 hinged to the side wall of the box body 1. An adjustment assembly 3 is fixedly installed at the top of the inner cavity of the box body 1. The adjustment assembly 3 includes a fixing block 301, and a fixing box 302 is welded to the bottom of the fixing block 301. A motor 303 is fixedly installed on the side wall of the fixing box 302. A rotating shaft 304 is fixedly installed at the output end of the motor 303. Two winding rollers 305 are fixedly installed on both sides of the outer circumference of the rotating shaft 304. Pull ropes 306 are fixedly installed on the outer circumference of the two winding rollers 305. A movable seat 307 is fixedly installed at the bottom of the two pull ropes 306. A gear 308 is fixedly installed on the outer circumference of the rotating shaft 304. An electric push rod 309 is fixedly installed at the bottom of the inner cavity of the fixing box 302. A connecting plate 310 is fixedly installed at the output end of the push rod 309. A locking block 311 is welded to the top of the side wall of the connecting plate 310. A microphone 4 is fixedly installed at the top of the inner cavity of the housing 1. Multiple vibration damping components 5 are fixedly installed at the bottom of the housing 1. The capacitor is placed on the top of the movable seat 307, and noise is tested through the microphone 4. By turning on the motor 303, the rotating shaft 304 is rotated, which causes the winding roller 305 to drive the pull rope 306 to wind up. Then the position of the movable seat 307 is adjusted to facilitate testing the noise attenuation data of the capacitor as the distance changes. By turning on the electric push rod 309, the connecting plate 310 is moved, which causes the locking block 311 to move and engage the gear 308, which is convenient for locking and prevents the capacitor from slipping.

[0036] It is worth noting that, in order to prevent the sound source caused by external environmental vibration from affecting the noise test results, the vibration damping component 5 specifically includes a fixed base 501. Multiple damping spring vibration dampers 502 are fixedly installed at the bottom of the inner cavity of the fixed base 501, and a support block 503 is fixedly installed on the top of the damping spring vibration damper 502. Multiple rotating grooves 504 are opened on both sides of the support block 503, and ball bearings 505 are rotatably connected to the inner circumference of the multiple rotating grooves 504. The support block 503 supports the housing 1. When the external environment vibrates, the housing 1 drives the support block 503 to vibrate. The multiple damping spring vibration dampers 502 facilitate buffering and vibration reduction, which helps to reduce the impact of the sound source caused by external environmental vibration on the noise test results. The ball bearings 505 roll along the inner cavity side wall of the fixed base 501, which makes the reset and movement of the support block 503 more stable.

[0037] Next, in order to prevent the gear 308 from loosening after locking, the rotating shaft 304 is rotatably connected to the inner cavity side wall of the housing 1. The size and position of the gear 308 match the size and position of the locking block 311. By matching the size and position of the gear 308 with the locking block 311, the locking of the gear 308 is made more stable, avoiding shaking that could affect the noise in the city.

[0038] Meanwhile, in order to prevent the movable seat 307 from tipping over when it moves, specifically, the movable seat 307 has limit grooves 312 on both side walls, and two limit rods 313 are fixed at the bottom of the inner cavity of the housing 1. The movable seat 307 slides along the limit rods 313 to limit the movement of the movable seat 307 and prevent it from tilting and causing the capacitor to fall.

[0039] Furthermore, to facilitate noise testing of the capacitor, specifically, the top opening of the movable seat 307 faces upward, and the size and position of the limiting groove 312 match the size and position of the limiting rod 313. The movable seat 307 with its top opening facing upward facilitates the storage of the capacitor for noise testing, while the limiting groove 312, which matches the size and position of the limiting rod 313, helps to improve stability.

[0040] It is worth noting that, in order to prevent the ball 505 from detaching, specifically, the diameter of the opening of the rotating groove 504 is smaller than the diameter of the ball 505. The ball 505 is rotatably connected to the inner cavity side wall of the fixed seat 501. By using the ball 505 with a diameter larger than the opening of the rotating groove 504, the ball 505 is prevented from falling off.

[0041] Finally, in order to improve the sound insulation effect, specifically, a sound insulation board 6 is fixed on the inner wall of the enclosure 1. The sound insulation board 6 is made of polyester fiber sound-absorbing cotton. The sound insulation board 6 made of polyester fiber sound-absorbing cotton can effectively isolate the noise of the enclosure 1 during noise testing.

[0042] In addition, the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. Furthermore, the scope of protection of this utility model does not involve improvements to the internal structure and methods.

[0043] The device or equipment models mentioned in this article may be as follows:

[0044] Motor 303: Y90S-2;

[0045] Electric linear actuator 309: LAM33-B.

[0046] Combination Figures 1-5 The capacitor noise test box of this embodiment is used in the following specific way:

[0047] 1: When this device is needed to be used as a capacitor noise test box, place the capacitor on top of the movable seat 307, use the microphone 4 to test the noise, start the motor 303 to make the rotating shaft 304 rotate and drive the winding roller 305 to wind up the pull rope 306, thereby adjusting the position of the movable seat 307 to test the noise attenuation data of the capacitor, start the electric push rod 309 to make the connecting plate 310 drive the locking block 311 to move and engage the gear 308;

[0048] 2: The support block 503 is fixedly connected to the bottom of the box 1. When the external environment vibrates, multiple damping spring dampers 502 buffer and reduce the vibration of the box 1. When the support block 503 moves back to its original position, the ball 505 rolls along the inner wall of the fixed seat 501.

[0049] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A capacitor noise testing box, characterized in that, The device includes a housing (1), with a door (2) hinged to the side wall of the housing (1). An adjustment assembly (3) is provided at the top of the inner cavity of the housing (1). The adjustment assembly (3) includes a fixing block (301), a fixing box (302) at the bottom of the fixing block (301), a motor (303) on the side wall of the fixing box (302), a rotating shaft (304) at the output end of the motor (303), and two take-up rollers (305) on the outer circumference of the rotating shaft (304). The two take-up rollers (305) are circumferentially... All outer walls are provided with pull ropes (306), and the bottom of the two pull ropes (306) is provided with a movable seat (307). The outer circumference of the rotating shaft (304) is provided with a gear (308). The bottom of the inner cavity of the fixed box (302) is provided with an electric push rod (309). The output end of the electric push rod (309) is provided with a connecting plate (310). The top of the side wall of the connecting plate (310) is provided with a locking block (311). The top of the inner cavity of the box (1) is provided with a microphone (4). The bottom of the box (1) is provided with multiple vibration damping components (5).

2. The capacitor noise testing box according to claim 1, characterized in that, The vibration damping assembly (5) includes a fixed base (501), and a plurality of damping spring vibration dampers (502) are provided at the bottom of the inner cavity of the fixed base (501). A support block (503) is provided at the top of the damping spring vibration damper (502). A plurality of rotating grooves (504) are provided on both sides of the support block (503), and a ball bearing (505) is rotatably connected to the inner circumference of the plurality of rotating grooves (504).

3. The capacitor noise testing box according to claim 2, characterized in that, The rotating shaft (304) is rotatably connected to the inner cavity side wall of the housing (1), and the size and position of the gear (308) match the size and position of the locking block (311).

4. The capacitor noise testing box according to claim 3, characterized in that, The movable seat (307) has limit grooves (312) on both side walls, and the box body (1) has two limit rods (313) at the bottom of the inner cavity.

5. The capacitor noise testing box according to claim 4, characterized in that, The top opening of the movable seat (307) faces upward, and the size and position of the limiting groove (312) match the size and position of the limiting rod (313).

6. The capacitor noise test chamber according to claim 5, characterized in that, The diameter of the opening of the rotating groove (504) is smaller than the diameter of the ball (505), and the ball (505) is rotatably connected to the inner wall of the fixed seat (501).

7. The capacitor noise test chamber according to claim 6, characterized in that, The inner wall of the box (1) is provided with a sound insulation board (6), and the material of the sound insulation board (6) is polyester fiber sound-absorbing cotton.

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