Auxiliary device for automobile NVH (Noise Vibration and Harshness) test

Abstract

The utility model discloses an auxiliary device for an automobile NVH test. The auxiliary device comprises a mounting plate, a lifting push rod, a lifting support, a transmission shaft, a lifting plate and a vibration measuring device. According to the utility model, through the arrangement of the vibration detection device, when the detection plate is subjected to vibration pressure generated in the running process of a vehicle, the pressure presses the lifting frame downwards, and the lifting frame stretches out and draws back downwards, so that the telescopic module stretches out and draws back while buffering the downward vibration force transmitted by the lifting frame, and the vibration force borne by the telescopic module is recorded by an inductor; according to the invention, the vibration force is recorded through the vibration measuring device, so that a worker can conveniently measure and calculate the magnitude of noise generated under the vibration frequency through the record, the effect of recording the vibration force through the vibration measuring device is achieved, and the worker can conveniently measure and calculate the magnitude of noise generated under the vibration frequency through the record. And therefore, the problem that most equipment cannot detect the noise generated by the vehicle due to vibration, so that a worker needs to analyze the noise subsequently is solved.

Description

Technical Field

[0001] The utility model relates to the field of NVH test auxiliary tools, in particular to an auxiliary device for automobile NVH test. Background Art

[0002] Noise, Vibration and Harshness is an abbreviation for automobile manufacturing quality. It is a comprehensive issue to measure the quality of automobile manufacturing. It gives the most direct and superficial experience to automobile users. The NVH problem of vehicles is one of the issues that major vehicle manufacturers and parts manufacturers in the international automobile industry are concerned about. Statistics show that about 1 / 3 of the failure problems of the whole vehicle are related to the NVH problem of the vehicle, and nearly 20% of the research and development expenses of major companies are spent on solving the NVH problem of vehicles.

[0003] For example, the patent announcement number CN217384714U discloses an automobile NVH test auxiliary device, which moves the chassis as a whole through the connecting rods on the supporting mechanism. The driving platform can move through the sliding screw, and further move the sound pressure sensor, so that the sound pressure sensor approaches the location where the abnormal sound occurs, which is convenient for tracing the location of the abnormal sound of the frame.

[0004] However, when the device is in use, it is usually necessary to deploy several sensors to initially capture abnormal points. However, the results of this detection method are too single, which makes it impossible to analyze how much noise the vehicle will generate due to vibration, which in turn causes the staff to need to conduct subsequent analysis. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides an auxiliary device for automobile NVH test.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an auxiliary device for automobile NVH test, comprising a mounting plate, a lifting push rod, a lifting bracket, a transmission shaft, a lifting plate, and a seismic measuring device, a lifting push rod is installed on the top of the mounting plate, the lifting push rod is transmission-connected with the bottom of the lifting plate, the lifting bracket is arranged at the bottom of the lifting plate, the bottom of the lifting bracket is slidably connected with the mounting plate, the seismic measuring device is installed on the top of the lifting plate, the seismic measuring device comprises a box, a sensor, a signal transmitter, a detection plate, a lifting frame, a telescopic module, a limiting block, and a limiting groove, the box is fixed to the top of the lifting plate, a sensor is arranged at the front end of the box, a signal transmitter is installed at the top of the sensor, the detection plate is fixed to the top of the lifting frame, the lifting frame is slidably connected to the top of the box, the telescopic module is installed inside the box, and it is movably matched with the bottom of the lifting frame, the limiting block is fixed to the bottom of the lifting frame, and the limiting block is movably connected to the inside of the limiting groove.

[0007] Preferably, the telescopic module includes a fixed block, a guide groove, a telescopic spring, and a telescopic block. The fixed block is fixed to the inner left end of the box body, and a telescopic spring is provided at the right end. The guide groove is fixed to the inner bottom end of the box body, and a telescopic block is installed at the right end of the telescopic spring. The telescopic block is slidably connected to the inside of the guide groove, and the telescopic block is movably matched with the bottom end of the lifting frame.

[0008] In a further preferred embodiment, the sensors are provided in two groups, and the two groups of sensors are both arranged in the box.

[0009] In a further preferred embodiment, the detection plate and the lifting frame are vertically arranged on the box body.

[0010] In a further preferred embodiment, telescopic modules are provided at both ends of the bottom of the lifting frame.

[0011] It is further preferred that the size of the limiting block is consistent with the inner size of the limiting groove, which is beneficial for the limiting groove and the limiting block to fit together and prevent the lifting frame from being misaligned.

[0012] It is further preferred that the fixed block, telescopic spring and telescopic block are all arranged at the top of the guide groove, and being placed in the guide groove can guide the telescopic spring and the telescopic block.

[0013] In a further embodiment, the cross section of the telescopic block is trapezoidal and fits with the bottom of the lifting frame.

[0014] It is further preferred that the sensor can be replaced by a sensor of the FD-X series.

[0015] Beneficial effects of the utility model:

[0016] The utility model is provided with a vibration measuring device. When the detection plate is subjected to vibration pressure generated during the operation of the vehicle, the pressure presses down the lifting frame, and the lifting frame telescopes the module downward, so that the telescopic module buffers the vibration force transmitted by the lifting frame and telescopes at the same time. The sensor records the vibration force received by the telescopic module, which makes it convenient for the staff to calculate how much noise will be generated at the vibration frequency through the record, thereby achieving the effect of recording the vibration force through the vibration measuring device, which makes it convenient for the staff to calculate how much noise will be generated at the vibration frequency through the record, thereby solving the problem that most equipment cannot measure how much noise will be generated by the vibration of the vehicle, prompting the staff to analyze the noise later.

[0017] The utility model is provided with a telescopic module, and the lifting frame pushes the telescopic block downward to move along the guide groove, so that the telescopic block squeezes the telescopic spring, thereby prompting the telescopic spring to be telescoped, which is convenient for the sensor to detect the telescopic spring, thereby achieving the effect of buffering the downward shock force transmitted by the lifting frame through the telescopic module and telescoping at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the plane structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the seismic measuring device in the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the seismic measuring device in the utility model;

[0022] Figure 5 It is a schematic diagram of the telescopic module structure of the utility model.

[0023] Among them: mounting plate-1, lifting push rod-2, lifting bracket-3, transmission shaft-4, lifting plate-5, seismic measuring device-6, box-61, sensor-62, signal transmitter-63, detection plate-64, lifting frame-65, telescopic module-66, limiting block-67, limiting groove-68, fixing block-661, guide groove-662, telescopic spring-663, telescopic block-664. DETAILED DESCRIPTION

[0024] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0025] See also Figure 1-2The utility model provides an auxiliary device for automobile NVH test, including a mounting plate 1, a lifting push rod 2, a lifting bracket 3, a transmission shaft 4, a lifting plate 5, and a vibration measuring device 6. The lifting push rod 2 is installed on the top of the mounting plate 1, the lifting push rod 2 is transmission-connected to the bottom of the lifting plate 5, the lifting bracket 3 is arranged at the bottom of the lifting plate 5, the bottom of the lifting bracket 3 is slidingly connected to the mounting plate 1, and the vibration measuring device 6 is installed on the top of the lifting plate 5.

[0026] See also Figure 3-4 The utility model provides an auxiliary device for automobile NVH test. The vibration measuring device 6 includes a box 61, a sensor 62, a signal transmitter 63, a detection plate 64, a lifting frame 65, a telescopic module 66, a limiting block 67, and a limiting groove 68. The box 61 is fixed to the top of the lifting plate 5, the front end of the box 61 is provided with a sensor 62, the top of the sensor 62 is installed with a signal transmitter 63, the detection plate 64 is fixed to the top of the lifting frame 65, the lifting frame 65 is slidably connected to the top of the box 61, the telescopic module 66 is installed inside the box 61, and it is movably matched with the bottom of the lifting frame 65, the limiting block 67 is fixed to the bottom of the lifting frame 65, and the limiting block 67 is movably connected to the inside of the limiting groove 68.

[0027] In this embodiment, two groups of sensors 62 are provided, and both groups of sensors 62 are arranged in the box body 61. The detection plate 64 and the lifting frame 65 are vertically arranged in the box body 61. Telescopic modules 66 are provided at both ends of the bottom of the lifting frame 65. The size of the limiting block 67 is consistent with the internal size of the limiting groove 68, which is conducive to the mutual fit of the limiting groove 68 and the limiting block 67 to prevent the lifting frame 65 from being misaligned. The sensor 62 can be replaced by an FD-X series sensor.

[0028] See also Figure 5 The utility model provides an auxiliary device for automobile NVH test. The telescopic module 66 includes a fixed block 661, a guide groove 662, a telescopic spring 663, and a telescopic block 664. The fixed block 661 is fixed to the left end of the interior of the box body 61, and a telescopic spring 663 is arranged at the right end. The guide groove 662 is fixed to the bottom end of the interior of the box body 61. The right end of the telescopic spring 663 is installed with a telescopic block 664. The telescopic block 664 is slidably connected to the interior of the guide groove 662, and the telescopic block 664 is movably matched with the bottom end of the lifting frame 65.

[0029] In this embodiment, the fixed block 661, the telescopic spring 663, and the telescopic block 664 are all arranged at the top of the guide groove 662. The guide groove 662 can guide the telescopic spring 663 and the telescopic block 664. The cross-section of the telescopic block 664 is trapezoidal and fits with the bottom of the lifting frame 65.

[0030] See also Figure 1-Figure 5When in use, the mounting plate 1 is placed on the testing platform to support the equipment. After the staff drives the vehicle into the testing platform and takes protective measures, the sensing equipment is installed on each testing point, so that the staff can collect the noise data generated when the vehicle is running.

[0031] In the further experiment, when the staff starts the vehicle, the vehicle generates a roaring sound as the speed increases. During this process, the staff can collect the noise data generated by the vehicle by installing sensing equipment at each detection point.

[0032] At the same time, when the detection plate 64 is subjected to the vibration pressure generated during the operation of the vehicle, the pressure presses down the lifting frame 65, and the lifting frame 65 pushes the telescopic block 664 downward to move along the guide groove 662, so that the telescopic block 664 squeezes the telescopic spring 663, thereby prompting the telescopic spring 663 to expand and contract, so that the sensor 62 can detect the telescopic spring 663 during the expansion and contraction process, and then the telescopic module 66 transmits the vibration force to the lifting frame 65 to buffer and expand and contract at the same time, and the sensor 62 records the vibration force on the telescopic module 66, so that the staff can use this record to calculate how much noise will be generated at the vibration frequency, and then achieve the purpose of recording the vibration force through the vibration measuring device 6, so that the staff can use this record to calculate how much noise will be generated at the vibration frequency, thereby solving the problem that most equipment cannot measure how much noise will be generated by the vibration of the vehicle, prompting the staff to analyze the noise later.

[0033] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0034] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0035] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary device for automobile NVH test, comprising a mounting plate (1), a lifting push rod (2), a lifting bracket (3), a transmission shaft (4), a lifting plate (5), and a vibration measuring device (6), wherein a lifting push rod (2) is mounted on the top of the mounting plate (1), the lifting push rod (2) is in transmission connection with the bottom of the lifting plate (5), the lifting bracket (3) is arranged at the bottom of the lifting plate (5), the bottom of the lifting bracket (3) is slidably connected with the mounting plate (1), and the vibration measuring device (6) is mounted on the top of the lifting plate (5); Features: The seismic measuring device (6) comprises a box (61), a sensor (62), a signal transmitter (63), a detection plate (64), a lifting frame (65), a telescopic module (66), a limiting block (67), and a limiting groove (68). The box (61) is fixed to the top of the lifting plate (5). The front end of the box (61) is provided with a sensor (62). The top of the sensor (62) is installed with a signal transmitter (63). The detection plate (64) is fixed to the top of the lifting frame (65). The lifting frame (65) is slidably connected to the top of the box (61). The telescopic module (66) is installed inside the box (61) and is movably matched with the bottom of the lifting frame (65). The limiting block (67) is fixed to the bottom of the lifting frame (65). The limiting block (67) is movably connected to the inside of the limiting groove (68).

2. The auxiliary device for automobile NVH test according to claim 1, characterized in that: The telescopic module (66) comprises a fixed block (661), a guide groove (662), a telescopic spring (663), and a telescopic block (664); the fixed block (661) is fixed to the left end of the interior of the box body (61), and a telescopic spring (663) is provided at the right end; the guide groove (662) is fixed to the bottom end of the interior of the box body (61); the right end of the telescopic spring (663) is installed with a telescopic block (664); the telescopic block (664) is slidably connected to the interior of the guide groove (662), and the telescopic block (664) is movably matched with the bottom end of the lifting frame (65).

3. The auxiliary device for automobile NVH test according to claim 1, characterized in that: The sensors (62) are provided in two groups, and the two groups of sensors (62) are both arranged in the box (61).

4. The auxiliary device for automobile NVH test according to claim 1, characterized in that: The detection plate (64) and the lifting frame (65) are vertically arranged on the box body (61).

5. The auxiliary device for automobile NVH test according to claim 1, characterized in that: Both ends of the bottom of the lifting frame (65) are provided with telescopic modules (66).

6. The auxiliary device for automobile NVH test according to claim 1, characterized in that: The size of the limiting block (67) is consistent with the internal size of the limiting groove (68).

7. The auxiliary device for automobile NVH test according to claim 2, characterized in that: The fixed block (661), the telescopic spring (663), and the telescopic block (664) are all arranged at the top of the guide groove (662).

8. The auxiliary device for automobile NVH test according to claim 2, characterized in that: The cross section of the telescopic block (664) is trapezoidal and fits with the bottom of the lifting frame (65).

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