Sound detection device for motor

Abstract

The utility model relates to the technical field of motor performance detection equipment, and provides a sound detection device for a motor, which comprises a supporting device for placing the motor to be tested, a noise sensor for detecting sound generated by the motor and a load driving device, the load driving device comprises an ejector rod used for abutting against a motor shaft of the motor, an assembling support, a mounting base capable of being movably mounted on the assembling support in the extending direction of the ejector rod, an elastic assembly arranged on the assembling support and connected with the mounting base, and a support power piece used for driving the assembling support to move in the extending direction of the ejector rod. The elastic assembly comprises a base shaft, an elastic element installed on the base shaft and an elastic force adjusting piece used for adjusting the elastic force of the elastic element. Compared with the prior art, the force applied by the load to the motor can be adjusted and controlled, and the detection effect and the test precision of the motor are ensured to a certain extent.

Description

Technical Field

[0001] This utility model relates to the technical field of motor performance testing equipment, and in particular to a sound detection device for motors. Background Technology

[0002] The electric tailgate motor is the driving source of the entire system. By receiving control signals, it completes the smooth opening and closing of the tailgate. Therefore, the tailgate motor must not only be able to withstand the weight of the tailgate, but also meet the user's high standards for low noise, smooth operation, and compact size.

[0003] Currently, before a motor leaves the factory, its performance needs to be tested, including the testing of the motor's noise and abnormal sounds. The traditional testing method is to use a load device to apply pressure to the motor shaft with a push rod. However, because the pressure applied by the load device is difficult to control, the force on the motor shaft is different, and the sound produced after the impact is also different. This leads to a large test error and affects the test results. Utility Model Content

[0004] The purpose of this invention is to provide a sound detection device for motors to solve the technical problem of poor motor testing results in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sound detection device for an electric motor is provided, comprising a support device for placing the motor to be tested, a noise sensor for detecting the sound generated by the motor, and a load drive device. The load drive device includes a push rod for abutting against the motor shaft, a mounting bracket, a mounting seat movably mounted on the mounting bracket along the extension direction of the push rod, an elastic component disposed on the mounting bracket and connected to the mounting seat, and a support power component for driving the mounting bracket to move along the extension direction of the push rod. The elastic component includes a base shaft, an elastic element mounted on the base shaft, and a spring force adjustment component for adjusting the elastic force of the elastic element.

[0006] In some embodiments, the motor shaft of the motor has a first end and a second end opposite to each other, and the number of load drive devices is two, one of which is used to abut against the end face of the first end and the other is used to abut against the side wall surface of the second end.

[0007] In some embodiments, the elastic element is a compression spring, which is mounted on the base shaft and can be compressed and deformed as the mounting base moves relative to the mounting bracket.

[0008] In some embodiments, the mounting bracket has a through hole for the base shaft to move, one end of the base shaft is provided with a fixing part connected to the mounting base, and the other end is provided with a limiting part for restricting the relative movement of the base shaft and the mounting bracket.

[0009] In some embodiments, the base shaft has a mounting portion for mounting a compression spring and connecting it to a fixing portion and a limiting portion respectively. The mounting portion has a thread and a spring adjustment member is threadedly connected to it. One end of the compression spring abuts against the spring adjustment member, and the other end abuts against the mounting bracket.

[0010] In some embodiments, the fixing part is threaded, and an anti-loosening fastener is threadedly connected to the fixing part.

[0011] In some embodiments, a pressure sensor is provided on the mounting base for detecting the pressure of the push rod on the motor shaft of the motor.

[0012] In some embodiments, the mounting bracket is provided with a guide rail, and the mounting base is mounted on the guide rail by a slider.

[0013] In some embodiments, the device further includes a power supply unit, which includes a power supply bracket, a connection terminal mounted on the power supply bracket for interfacing with a power interface of the motor, and a plug-in power component capable of moving the power supply bracket.

[0014] In some embodiments, the power supply bracket has a connection hole for the top rod to move.

[0015] Compared with existing technologies, the sound detection device for motors provided by this utility model includes a support device, a noise sensor, and a load drive device. The load drive device includes a push rod, a mounting bracket, a mounting base, an elastic component, and a support power component. The elastic component includes a base shaft, an elastic element, and a force adjustment component for adjusting the elastic force of the elastic element. In this way, the elastic force of the push rod can be adjusted through the elastic component to achieve a preset elastic force. Then, the support power component drives the push rod to abut against the motor shaft, and the noise sensor detects the sound generated by the motor. In this way, the magnitude of the force applied by the load to the motor can be adjusted and controlled, which to a certain extent ensures the detection effect and testing accuracy of the motor. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the sound detection device for motors provided in an embodiment of the present invention;

[0017] Figure 2 This is a perspective view of the load drive device, motor, and support device provided in the embodiment of this utility model;

[0018] Figure 3 This is an exploded view of the load drive device, motor, and support device provided in an embodiment of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the load drive device, motor, and support device provided in the embodiment of this utility model.

[0020] Explanation of main component symbols

[0021] 100 - Sound detection device for motor; 101 - Base; 10 - Support device; 11 - Support claw; 12 - Support power component; 20 - Noise sensor; 30 - Load drive device; 31 - Push rod; 32 - Assembly bracket; 321 - Through hole; 33 - Mounting seat; 331 - Fixing hole; 332 - Base; 333 - Adjusting seat; 34 - Elastic component; 341 - Base shaft; 3411 - Fixing part; 3412 - Limiting part; 3413 - Installation... 342-Elastic element; 343-Elasticity adjustment component; 35-Support power component; 351-Drive part; 352-Moving part; 36-Anti-loosening fastener; 37-Pressure sensor; 38-Guide rail; 39-Slider; 40-Power supply device; 41-Power supply bracket; 411-Connecting hole; 42-Connecting end; 43-Plug-in / plug-out power component; 200-Motor; 201-Motor shaft; 201a-First end; 201b-Second end. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the implementation of this utility model will be described in detail below with reference to the specific accompanying drawings.

[0024] For ease of description, the terms "front," "rear," "left," "right," "up," and "down" used below are consistent with the front, rear, left, right, up, and down directions of the accompanying drawings, but do not limit the structure of this utility model.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0026] like Figures 1 to 4As shown, the sound detection device 100 for a motor provided in this embodiment includes a support device 10 for placing the motor 200 to be tested, a noise sensor 20 for detecting the sound generated by the motor 200, and a load drive device 30. The load drive device 30 includes a push rod 31 for abutting against the motor shaft 201 of the motor 200, a mounting bracket 32, a mounting seat 33 movably mounted on the mounting bracket 32 ​​along the extension direction of the push rod 31, an elastic component 34 disposed on the mounting bracket 32 ​​and connected to the mounting seat 33, and a bracket power member 35 for driving the mounting bracket 32 ​​to move along the extension direction of the push rod 31. The elastic component 34 includes a base shaft 341, an elastic element 342 mounted on the base shaft 341, and an elastic force adjusting member 343 for adjusting the elastic force of the elastic element 342.

[0027] The aforementioned sound detection device 100 for motors includes a support device 10, a noise sensor 20, and a load drive device 30. The load drive device 30 includes a push rod 31, a mounting bracket 32, a mounting base 33, an elastic component 34, and a support power component 35. The elastic component 34 includes a base shaft 341, an elastic element 342, and an elastic force adjustment component 343 for adjusting the elastic force of the elastic element 342. In this way, the elastic force of the push rod 31 can be adjusted by the elastic component 34 to reach a preset elastic force. Then, the support power component 35 drives the push rod 31 to abut against the motor shaft 201 of the motor 200, and the noise sensor 20 detects the sound generated by the motor 200. In this way, the magnitude of the force applied by the load to the motor 200 can be adjusted and controlled, which to a certain extent ensures the detection effect and testing accuracy of the motor 200.

[0028] See Figure 1 The sound detection device 100 for motors provided in this embodiment includes an outer casing (not shown in the figure). The outer casing is made of metal and has sound-insulating sponge on its inner wall. A base 101 is provided inside the outer casing. The support device 10 and the load drive device 30 are both mounted on the base 101 and supported by the base 101. In this way, by performing noise detection on the motor 200 under test in a closed space, interference from external sounds is avoided, thereby improving the detection accuracy.

[0029] See Figure 1In this embodiment, the number of support devices 10 is not limited to two, and they are arranged at intervals on the base 101. The number of load drive devices 30 is not limited to four, with the four load drive devices 30 divided into two groups of two. Each support device 10 corresponds to one group of load drive devices 30. The two load drive devices 30 in each group are placed at both ends of the support device 10 to abut against the two ends of the motor shaft 201. The number of noise sensors 20 is not limited to two, and they correspond one-to-one with the two support devices 10. It should be noted that the two electric... The detection of motor 200 is performed separately and not synchronously. The noise sensor 20 can transmit the detected sound waves to the processor (not shown in the figure) through an electrical signal. If the detected decibel value is within the set decibel value, the noise detection of the motor 200 is qualified; otherwise, it is unqualified. If the detected sound frequency band belongs to the set sound frequency band, the abnormal noise detection of the motor 200 is qualified; otherwise, it is unqualified. The noise sensor 20 mentioned above is any existing noise sensor 20 that can receive the sound waves generated by the motor 200, and the processor mentioned above is any existing processor in the prior art that can realize the above functions.

[0030] See Figure 1 The support device 10 provided in this embodiment is used to place the motor 200 to be tested. The support device 10 includes two support claws 11 for clamping the motor 200 and a support power member 12 that enables the two support claws 11 to move relative to each other. The support power member 12 is, but is not limited to, a cylinder, and is fixedly installed on the base 101 by fasteners.

[0031] See Figures 1 to 4The load drive device 30 provided in this embodiment includes a push rod 31 for abutting against the motor shaft 201 of the motor 200, a mounting bracket 32, a mounting seat 33 movably mounted on the mounting bracket 32 ​​along the extending direction of the push rod 31, an elastic component 34 disposed on the mounting bracket 32 ​​and connected to the mounting seat 33, and a support power member 35 for driving the mounting bracket 32 ​​to move along the extending direction of the push rod 31. In this embodiment, the support power member 35 is, but is not limited to, a cylinder. The support power member 35 includes a driving part 351 and a moving part 352 that can move relative to the driving part 351 along the extending direction of the push rod 31. The mounting bracket 32 ​​is fixed on the moving part 352. The push rod 31 has a circular cross-section. The motor shaft 201 of the motor 200 has opposing first end 201a and second end 201b. In a set of load drive devices 30 corresponding to each support device 10, the push rod 31 of one of the two load drive devices 30... The center is basically coincident with the axis of the motor shaft 201. The extension direction of the push rod 31 of the load drive device 30 is parallel to the axial direction of the motor shaft 201. Under the drive of the bracket power member 35, the push rod 31 of the load drive device 30 abuts against the end face of the first end 201a. The extension direction of the push rod 31 of the other load drive device 30 is orthogonal to the axial direction of the motor shaft 201. Under the drive of the bracket power member 35, the push rod 31 of the load drive device 30 abuts against the side wall surface of the second end 201b. The elastic component 34 can apply elastic force to the push rod 31 after it contacts the motor shaft 201. It can be understood that by designing a preset elastic force for the elastic component 34, the bracket power member 35 drives the assembly bracket 32 ​​to move, thereby driving the mounting seat 33 and the push rod 31 mounted on the assembly bracket 32 ​​to move. After the push rod 31 moves to the predetermined position, it abuts against the motor shaft 201, and the preset elastic force of the elastic component 34 pushes the push rod 31 to apply to the motor shaft 201.

[0032] See Figures 2 to 4 In this embodiment, the elastic component 34 includes a base shaft 341, an elastic element 342 mounted on the base shaft 341, and an elastic force adjusting member 343 for adjusting the elastic force of the elastic element 342. The elastic element 342 is, but is not limited to, a compression spring. The elastic element 342 is mounted on the base shaft 341 and is deformed under pressure when the mounting base 33 moves relative to the mounting bracket 32. The axis of the base shaft 341, the center line of the push rod 31, and the axis of the motor shaft 201 are substantially coincident.

[0033] In other embodiments, one end of the compression spring may also be fixedly mounted on the mounting bracket 32.

[0034] See Figures 2 to 4In this embodiment, the mounting bracket 32 ​​is provided with a through hole 321 for the base shaft 341 to move. One end of the base shaft 341 is provided with a fixing part 3411 connected to the mounting base 33, and the other end is provided with a limiting part 3412 for restricting the relative movement of the base shaft 341 and the mounting bracket 32. In this embodiment, the mounting base 33 is provided with a fixing hole 331, the fixing part 3411 is formed with an external thread, and the inner wall of the fixing hole 331 is formed with a thread. The fixing part 3411 of the base shaft 341 is threadedly connected to the mounting base 33. The limiting part 3412 is located on the side of the mounting bracket 32 ​​away from the mounting base 33, and the diameter of the limiting part 3412 is larger than the diameter of the through hole 321.

[0035] In other embodiments, the base shaft 341 may also be fixed to the mounting bracket 32, with the other end movably connected to the mounting base 33.

[0036] See Figures 2 to 4 The base shaft 341 provided in this embodiment has a mounting part 3413 for mounting a compression spring and connected to the fixing part 3411 and the limiting part 3412 respectively. The mounting part 3413 has a thread and a spring adjustment member 343 is threadedly connected to it. One end of the compression spring abuts against the spring adjustment member 343 and the other end abuts against the mounting bracket 32. In this embodiment, the mounting part 3413 is disposed between the fixing part 3411 and the limiting part 3412. The compression spring is sleeved on the mounting part 3413. The spring adjustment member 343 is threadedly connected to the mounting part 3413. The spring adjustment member 343 is, but is not limited to, a nut. The two ends of the compression spring abut against the spring adjustment member 343 and the mounting bracket 32 ​​respectively. It is easy to understand that by turning the spring adjustment member 343, its position on the base shaft 341 is changed, thereby changing the length of the compression spring and adjusting the spring force of the compression spring to the preset spring force.

[0037] See Figures 2 to 4 In this embodiment, the fixing part 3411 is threaded with an anti-loosening fastener 36. In this embodiment, the anti-loosening fastener 36 is, but is not limited to, a nut. The diameter of the anti-loosening fastener 36 is smaller than that of the elastic adjustment part 343. In this way, the connection between the base shaft 341 and the mounting base 33 can be prevented from becoming loose due to the vibration generated by the motor 200 during the testing process.

[0038] See Figure 3 and Figure 4In this embodiment, a pressure sensor 37 is provided on the mounting base 33 for detecting the pressure of the push rod 31 on the motor shaft 201 of the motor 200. In this embodiment, the mounting base 33 includes a base 332 and an adjusting base 333. The base 332 is mounted on the mounting bracket 32, the pressure sensor 37 is mounted on the base 332, and the adjusting base 333 is fixed on the base 332 by fasteners. The adjusting base 333 has a fixing hole 331 for the fixing part 3411 to be inserted.

[0039] See Figures 2 to 4 The assembly bracket 32 ​​provided in this embodiment is provided with a guide rail 38. The extension direction of the guide rail 38 is parallel to the extension direction of the top rod 31. The mounting base 33 is mounted on the guide rail 38 by a slider 39.

[0040] See Figures 2 to 4 The sound detection device 100 for motor provided in this embodiment also includes a power supply device 40. The power supply device 40 includes a power supply bracket 41, a connection end 42 mounted on the power supply bracket 41 and used to connect with the power interface of the motor 200, and a plug-in power member 43 that can move the power supply bracket 41. In this embodiment, the plug-in power member 43 is, but is not limited to, a cylinder. The power supply bracket 41 is provided with a connection hole 411 for the push rod 31 to move.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sound detection device for an electric machine, characterized in that The load driving device comprises a top rod for abutting against a motor shaft of the motor, an assembly bracket, a mounting seat movably mounted on the assembly bracket along the extension direction of the top rod, an elastic assembly arranged on the assembly bracket and connected with the mounting seat, and a bracket power member for driving the assembly bracket to move along the extension direction of the top rod.

2. The sound detection apparatus for an electric machine according to claim 1, characterized by, The motor shaft of the motor has opposite first and second end portions, and the number of the load driving devices is two, one of the two load driving devices is used for abutting against an end face of the first end portion, and the other is used for abutting against a side wall surface of the second end portion.

3. The sound detection apparatus for an electric machine according to claim 1, characterized by, The elastic element is a compression spring which is installed on the base shaft and can be compressed and deformed when the mounting seat and the assembly bracket move relative to each other.

4. The sound detection apparatus for an electric machine according to claim 3, characterized by The assembly bracket is provided with a through hole for the movement of the base shaft, one end of the base shaft is provided with a fixing portion connected with the mounting seat, and the other end is provided with a limiting portion for limiting the relative movement of the base shaft and the assembly bracket.

5. The sound detection apparatus for an electric machine according to claim 4, characterized by The base shaft has a mounting portion for mounting the compression spring and connected with the fixing portion and the limiting portion respectively, the mounting portion is formed with a thread and threadedly connected with the elastic force adjusting member, one end of the compression spring abuts against the elastic force adjusting member, and the other end abuts against the assembly bracket.

6. The sound detection apparatus for an electric machine according to claim 4, characterized by The fixing portion is formed with a thread, and an anti-loosening fastener is threadedly connected on the fixing portion.

7. The sound detection apparatus for an electric machine according to any one of claims 1 to 6, characterized by The mounting seat is provided with a pressure sensor for detecting the pressure of the top rod on the motor shaft of the motor.

8. The sound detection device for an electric machine according to any one of claims 1 to 6, characterized in that, The assembly bracket is provided with a guide rail, and the mounting seat is mounted on the guide rail through a sliding block.

9. The sound detection apparatus for an electric machine according to any one of claims 1 to 6, characterized by The power supply device comprises a power supply bracket, a connecting end head mounted on the power supply bracket and used for abutting against a power supply interface of the motor, and a plug-in power member capable of moving the power supply bracket.

10. The sound detection apparatus for an electric machine according to claim 9, characterized by, The power supply bracket is provided with a connecting hole for the movement of the top rod.

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