Auxiliary device for automobile NVH test

Abstract

The utility model discloses an automobile NVH test auxiliary device, and specifically relates to the automobile performance test technology field, the automobile NVH test auxiliary device comprises a plurality of supporting cylinders, the output ends of the plurality of supporting cylinders are fixedly provided with supporting seats, a first adjusting screw rod is rotatably arranged between every two supporting seats, one end of the first adjusting screw rod is provided with a first motor, and the other end of the first adjusting screw rod is provided with a second motor. And moving blocks are installed outside the two first adjusting lead screws, a moving frame is fixedly arranged between the two moving blocks, a guide groove is formed in the surface of the moving frame in a penetrating mode, an I-shaped guide seat is slidably arranged in the guide groove, an auxiliary blowing structure is arranged at the top of the I-shaped guide seat, and the auxiliary blowing structure comprises two installing blocks. According to the utility model, the auxiliary operation during the automobile NVH test can be achieved, the purpose of tracing the abnormal sound position of the automobile frame can be achieved through transverse and longitudinal movement adjustment, and the accuracy of test data can be ensured during the experiment operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile performance test, more specifically, the utility model relates to an automobile NVH test auxiliary device. BACKGROUND

[0002] In the automobile research and development and production process, NVH (noise, vibration and sound roughness) performance is one of the key indicators to measure the quality of the automobile, directly affects the comfort of the driver and passenger and the market competitiveness of the vehicle, with the continuous improvement of the requirements of consumers on the automobile driving experience, the accurate detection and optimization of the automobile NVH performance are more and more important;

[0003] The NVH performance test generally places the test vehicle or the frame on the vibration bench, simulates the road conditions such as twisted road, plate road and deep pit road in the room, and provides experimental conditions of different road driving conditions and different temperature and humidity environment changes for the vehicle, so as to excite various possible causes of abnormal noise, and when abnormal noise occurs or there is an abnormal noise point, the position of the abnormal noise or the abnormal point needs to be determined, usually several sensors need to be arranged to preliminarily capture the abnormal point, and then the installation position of the sensor is further moved to make the sensor approach the abnormal point, so as to obtain the specific position of the abnormal source and further determine the cause of the abnormal noise.

[0004] According to the search, the Chinese patent with the publication number CN217384714U discloses an automobile NVH test auxiliary device, the structure moves the whole chassis through the connecting rod on the supporting mechanism, the driving table can move through the sliding lead screw, further moves the sound pressure sensor, makes the sound pressure sensor approach the position where the abnormal noise occurs, and facilitates tracing the position of the abnormal noise of the frame.

[0005] However, when the structure is used for test operation, the bottom of the frame needs to be knocked by the knocking hammer for knocking test, however, the bottom of the frame is exposed to the complex environment for a long time, once the surface accumulates dust, dirt or even rust, it will interfere with the transmission of knocking vibration in the test process, affect the accurate collection of noise signals by the sound pressure sensor, and further make the test data deviate, so that the test NVH test performance of the automobile cannot be truly reflected, in view of this, the utility model provides an automobile NVH test auxiliary device. UTILITY MODEL CONTENTS

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an automobile NVH test auxiliary device to solve the problems in the above background art.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: automobile NVH test auxiliary device, including a plurality of support cylinder a plurality of The output end of support cylinder is fixedly arranged with support seat, and first adjusting screw is rotatably arranged between every two support seats, and one end of first adjusting screw is provided with first motor, and the outside of two first adjusting screws is installed with moving block, and moving frame is fixedly arranged between two moving blocks, the surface of moving frame is penetrated with guide groove, the inside of guide groove is slidably provided with I -shaped guide base, first motor is fixedly installed on the surface of corresponding support seat, and the output end of first motor is fixedly connected with first adjusting screw, the moving block is screw connected on the outside of first adjusting screw.

[0008] It can be seen that the device height can be flexibly adjusted by the support cylinder to adapt to different frames, the first motor drives the first adjusting screw to rotate, drives the moving block and the moving frame to move, realizes the wide range movement of the device at the bottom of the frame, the I-shaped guide base slides in the guide groove, can be flexibly displaced on the moving frame, provides convenience for subsequent NVH test component positioning, and enhances the versatility and operation flexibility of the device.

[0009] In order to be able to blow dust or dirt to the part to be tested of the automobile, improve test precision, preferably, the top of the I-shaped guide base is provided with an auxiliary blowing structure, the auxiliary blowing structure comprises two mounting blocks, the two mounting blocks are fixedly installed on the surface of the I-shaped guide base, and a blowing pipe is rotatably arranged between the two mounting blocks, a plurality of blowing heads are communicated on the surface of the blowing pipe, one end of the blowing pipe is provided with a first micro servo motor, and the output end of the first micro servo motor is fixedly connected with the blowing pipe, a micro air pump is arranged on the surface of the I-shaped guide base and located on one side of one mounting block, the output end of the micro air pump is communicated with a conveying hose, and one end of the conveying hose is communicated with the blowing pipe.

[0010] In order to be able to realize that the I-shaped guide base moves on the moving frame, preferably, the bottom of the moving frame is fixedly installed with two rectangular blocks, a second adjusting screw is rotatably arranged between the two rectangular blocks, and a guide rod is arranged on one side of the second adjusting screw, one end of the second adjusting screw is provided with a second motor, the second motor is fixedly installed on the outer wall of the corresponding rectangular block, and the output end of the second motor is fixedly connected with the second adjusting screw, and the second adjusting screw and the guide rod are respectively screw connected and slidably connected with the I-shaped guide base.

[0011] In order to realize the detection and test operation of noise, preferably, the lower surface of the I-shaped guide seat is embedded with a sound pressure sensor, two supporting blocks are arranged on the lower surface of the I-shaped guide seat and located on one side of the sound pressure sensor, a rotating rod is rotatably arranged between the two supporting blocks, an adjusting block is fixedly arranged on the outer portion of the rotating rod, an adjusting rod is fixedly arranged on the bottom of the adjusting block, a spherical hinge seat is arranged on the bottom of the adjusting rod, a swing rod is connected to the bottom of the spherical hinge seat, a knocking ball is arranged on the bottom end of the swing rod, one end of the rotating rod is provided with a second micro servo motor, and the second micro servo motor is fixedly arranged on the outer wall of the corresponding supporting block, and the output end of the second micro servo motor is fixedly connected with the rotating rod.

[0012] The technical effects and advantages of the present application are as follows:

[0013] 1. By arranging the auxiliary blowing structure, the airflow is conveyed to the inside of the blowing pipe through the conveying hose by the micro air pump, and finally sprayed out through the blowing heads, which can effectively remove the dust and dirt on the detected part of the vehicle frame before the test, avoid the interference of impurities on the vibration transmission in the knocking test and the noise detection of the sound pressure sensor, and significantly improve the accuracy of the test data.

[0014] 2. The device height can be flexibly adjusted by the supporting cylinder, and the device is suitable for vehicle frames of different vehicle models, thereby greatly improving the universality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0016] Figure 2 It is a schematic diagram of the bottom structure of the I-shaped guide seat of the present application.

[0017] Figure 3 It is a schematic diagram of the connection structure of the I-shaped guide seat, the second adjusting screw rod and the guide rod of the present application.

[0018] Figure 4 It is a schematic diagram of the connection structure of the swing rod and the adjusting rod of the present application.

[0019] Figure 5 It is a schematic diagram of the auxiliary blowing structure of the present application.

[0020] The attached figures are labeled as follows: 1. Support cylinder; 2. Support base; 3. First adjusting screw; 4. First motor; 5. Moving block; 6. Moving frame; 7. Guide groove; 8. I-beam guide seat; 9. Mounting block; 10. Blow pipe; 11. Blow head; 12. First micro servo motor; 13. Micro air pump; 14. Delivery hose; 15. Rectangular block; 16. Second adjusting screw; 17. Guide rod; 18. Second motor; 19. Sound pressure sensor; 20. Support block; 21. Rotating rod; 22. Adjusting block; 23. Adjusting rod; 24. Ball joint seat; 25. Swing rod; 26. Striking ball; 27. Second micro servo motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figures 1-5 The automotive NVH test auxiliary device shown includes several support cylinders 1, each with a support base 2 fixedly mounted at its output end. A first adjusting screw 3 is rotatably mounted between every two support bases 2, and a first motor 4 is mounted at one end of each first adjusting screw 3. Moving blocks 5 are mounted on the outside of each of the two first adjusting screws 3, and a moving frame 6 is fixedly mounted between the two moving blocks 5. A guide groove 7 is opened through the surface of the moving frame 6, and an I-beam guide seat 8 is slidably mounted inside the guide groove 7. The first motor 4 is fixedly mounted on the surface of the corresponding support base 2, and the output end of the first motor 4 is fixedly connected to the first adjusting screw 3. The moving block 5 is threadedly connected to the outside of the first adjusting screw 3.

[0023] Specifically, in this structure, several support cylinders 1 can support the device and place it at the bottom of the car frame. The support cylinders 1 adjust the height of the entire device according to the height of the car frame. The first motor 4 drives the corresponding first adjusting screw 3 to rotate between the two support seats 2, so that the two moving blocks 5 drive the moving frame 6 to move at the bottom of the car frame and drive the I-beam guide seat 8 to move. The I-beam guide seat 8 can slide inside the guide groove 7, so that the sound pressure sensor 19, the striking ball 26 and the auxiliary blowing structure can move to different positions on the car chassis to perform NVH test auxiliary operations.

[0024] In this embodiment, as shown in the appendix Figure 1 , 2As shown in FIGS. 3, 5, the top of the I-shaped guide seat 8 is provided with an auxiliary blowing structure, the auxiliary blowing structure comprises two mounting blocks 9, the two mounting blocks 9 are fixedly installed on the surface of the I-shaped guide seat 8, and a blowing pipe 10 is rotatably arranged between the two mounting blocks 9, the surface of the blowing pipe 10 is communicated with a plurality of blowing heads 11, one end of the blowing pipe 10 is provided with a first micro servo motor 12, and the output end of the first micro servo motor 12 is fixedly connected with the blowing pipe 10, the surface of the I-shaped guide seat 8 and one side of one of the mounting blocks 9 are provided with a micro air pump 13, the output end of the micro air pump 13 is communicated with a conveying hose 14, and one end of the conveying hose 14 is communicated with the blowing pipe 10.

[0025] Specifically, in this structure, before the NVH test of the automobile chassis, the I-shaped guide seat 8 can move a plurality of blowing heads 11 to the part to be detected, the micro air pump 13 starts to send the airflow to the inside of the blowing pipe 10 through the conveying hose 14, and finally the airflow is sprayed out through the plurality of blowing heads 11, so that the part to be detected of the automobile can be blown, and the dust or dirt on the surface can be removed, so that the dust or dirt adhered can be avoided to affect the vibration knocking of the knocking ball 26, and then the dust or dirt can be avoided to affect the accuracy of the NVH test.

[0026] During the blowing process, the first micro servo motor 12 can drive the blowing pipe 10 to repeatedly rotate between the two mounting blocks 9, so that the plurality of blowing heads 11 at the top thereof can swing, and the blowing range can be improved.

[0027] In this embodiment, as shown in FIGS. 6, Figure 2 3 As shown in the drawings, the bottom of the moving frame 6 is fixedly installed with two rectangular blocks 15, the second adjusting screw rod 16 is rotatably arranged between the two rectangular blocks 15, one side of the second adjusting screw rod 16 is provided with a guide rod 17, one end of the second adjusting screw rod 16 is provided with a second motor 18, the second motor 18 is fixedly installed on the outer wall of the corresponding rectangular block 15, the output end of the second motor 18 is fixedly connected with the second adjusting screw rod 16, and the second adjusting screw rod 16 and the guide rod 17 are respectively in threaded connection and sliding connection with the I-shaped guide seat 8.

[0028] Specifically, in this structure, the second motor 18 drives the second adjusting screw rod 16 to rotate, so that the I-shaped guide seat 8 can move on the surface of the moving frame 6 under the action of the guide rod 17 and the guide groove 7, and power is provided for the movement of the I-shaped guide seat 8.

[0029] In this embodiment, as shown in FIGS. 6, Figure 2 3 ​​As shown in FIGS. 4, the lower surface of the I-shaped guide seat 8 is embeddedly installed with the sound pressure sensor 19, the lower surface of the I-shaped guide seat 8 and located at one side of the sound pressure sensor 19 is provided with two supporting blocks 20, the two supporting blocks 20 are rotationally provided with a rotating rod 21, the outer portion of the rotating rod 21 is fixedly provided with an adjusting block 22, the bottom of the adjusting block 22 is fixedly provided with an adjusting rod 23, the bottom of the adjusting rod 23 is provided with a spherical hinge seat 24, the bottom of the spherical hinge seat 24 is connected with a swing rod 25, the bottom end of the swing rod 25 is installed with a knocking ball 26, one end of the rotating rod 21 is provided with a second micro servo motor 27, the second micro servo motor 27 is fixedly installed on the outer wall of the corresponding supporting block 20, and the output end of the second micro servo motor 27 is fixedly connected with the rotating rod 21.

[0030] Specifically, in the structure, the sound pressure sensor 19 is used for detecting noise, and the I-shaped guide seat 8 can move the sound pressure sensor 19 to the position where the abnormal sound occurs during movement, and the second micro servo motor 27 drives the rotating rod 21 to continuously rotate forward and reverse between the two supporting blocks 20, so that the adjusting block 22 drives the adjusting rod 23 to swing, the adjusting rod 23 drives the swing rod 25 to swing under the action of the spherical hinge seat 24, and then the knocking ball 26 knocks the bottom of the vehicle frame, and the corresponding test data is obtained by using the sound pressure sensor 19.

[0031] Principle of the utility model:

[0032] The application provides an automobile NVH test auxiliary device, which is placed at the bottom of the vehicle frame during use, at this time, the supporting cylinders 1 work, the height of the device is adjusted according to the actual height of the vehicle frame, so that the device can stably be in a suitable working position, and preparation is made for subsequent operation;

[0033] The first motor 4 is started to drive the corresponding first adjusting lead screw 3 to rotate between the two supporting seats 2, since the moving blocks 5 are threadedly connected with the first adjusting lead screw 3, the rotation of the first adjusting lead screw 3 drives the two moving blocks 5 to move along the lead screw, the two moving blocks 5 drive the moving frame 6 to move at the bottom of the vehicle frame, and the movement of the moving frame 6 further drives the I-shaped guide seat 8 to move, so that the sound pressure sensor 19, the knocking ball 26 and the auxiliary blowing structure are moved to the approximate target detection area;

[0034] Before the test, when the I-shaped guide seat 8 moves a plurality of blowing heads 11 to the part to be detected, the miniature air pump 13 is started, the miniature air pump 13 sends the airflow to the inside of the blowing pipe 10 through the conveying hose 14, the airflow is sprayed out through the plurality of blowing heads 11, the part to be detected of the automobile is blown, in this process, the first miniature servo motor 12 drives the blowing pipe 10 to rotate repeatedly between the two mounting blocks 9, so that the plurality of blowing heads 11 on the top thereof swing, the blowing range is expanded, the dust or dirt on the surface of the part to be detected of the automobile is removed, and the precision of the subsequent vibration knocking and NVH test of the knocking ball 26 is avoided;

[0035] The second motor 18 is started, drives the second adjusting lead screw 16 to operate, since the second adjusting lead screw 16 is in threaded connection with the I-shaped guide seat 8, the guide rod 17 is in sliding connection with the I-shaped guide seat 8, under the joint action of the guide rod 17 and the guide groove 7, the I-shaped guide seat 8 can move more accurately on the surface of the moving frame 6, and reaches a specific detection position;

[0036] When the abnormal sound occurs in the vehicle test during the test, the sound pressure sensor 19 starts to work, is used for detecting the noise generated in the running process of the automobile, with the movement of the I-shaped guide seat 8, the sound pressure sensor 19 also moves, so that the position where the abnormal sound occurs can be located, when the abnormal sound position is determined, the second miniature servo motor 27 is started, drives the rotating rod 21 to rotate continuously in the two supporting blocks 20, the rotation of the rotating rod 21 drives the adjusting block 22 to rotate, the adjusting block 22 drives the adjusting rod 23 to swing, the adjusting rod 23 drives the swing rod 25 to swing under the action of the ball hinge seat 24, and then the knocking ball 26 knocks the part on the bottom of the vehicle frame after being blown, and the knocking test is carried out, in the knocking process, the sound pressure sensor 19 continuously acquires corresponding test data, so that the NVH performance of the automobile can be analyzed and evaluated subsequently.

[0037] It is explained that the contents not described in detail in the specification all belong to the prior art known by those skilled in the art, and the model parameters of various electrical appliances are not specifically limited, and conventional equipment can be used, in the technical solution, the electrical appliance control elements not mentioned belong to the prior art, and therefore are not shown in the drawing, and are not described here.

[0038] The above only describes preferred embodiments of the utility model, and is not used for limiting the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. Auxiliary device for NVH tests of a vehicle, comprising a number of support cylinders (1), characterized in that: The output end of each of the support cylinders (1) is fixedly provided with a support seat (2), and a first adjusting screw rod (3) is rotatably arranged between every two support seats (2), and one end of the first adjusting screw rod (3) is provided with a first motor (4), and the outer part of each of the two first adjusting screw rods (3) is provided with a moving block (5), and the two moving blocks (5) are fixedly provided with a moving frame (6), and a guide groove (7) is formed in the surface of the moving frame (6), and a I-shaped guide seat (8) is slidably arranged in the guide groove (7), and an auxiliary blowing structure is arranged on the top of the I-shaped guide seat (8); The auxiliary blowing structure comprises two mounting blocks (9), the two mounting blocks (9) are fixedly mounted on the surface of the I-shaped guide seat (8), and a blowing pipe (10) is rotatably arranged between the two mounting blocks (9), and a plurality of blowing heads (11) are communicated on the surface of the blowing pipe (10), and one end of the blowing pipe (10) is provided with a first micro servo motor (12), and the output end of the first micro servo motor (12) is fixedly connected with the blowing pipe (10); A micro air pump (13) is arranged on the surface of the I-shaped guide seat (8) and on one side of one of the mounting blocks (9), and the output end of the micro air pump (13) is communicated with a conveying hose (14), and one end of the conveying hose (14) is communicated with the blowing pipe (10).

2. The automobile NVH test auxiliary device according to claim 1, characterized in that: The first motor (4) is fixedly mounted on the surface of the corresponding support seat (2), and the output end of the first motor (4) is fixedly connected with the first adjusting screw rod (3), and the moving block (5) is threadedly connected on the outer part of the first adjusting screw rod (3).

3. The automobile NVH test auxiliary device according to claim 1, characterized in that: Two rectangular blocks (15) are fixedly mounted on the bottom of the moving frame (6), a second adjusting screw rod (16) is rotatably arranged between the two rectangular blocks (15), and a guide rod (17) is arranged on one side of the second adjusting screw rod (16), and one end of the second adjusting screw rod (16) is provided with a second motor (18).

4. The automobile NVH test auxiliary device according to claim 3, characterized in that: The second motor (18) is fixedly mounted on the outer wall of the corresponding rectangular block (15), and the output end of the second motor (18) is fixedly connected with the second adjusting screw rod (16), and the second adjusting screw rod (16) and the guide rod (17) are respectively threadedly connected with the I-shaped guide seat (8) and slidably connected with the I-shaped guide seat (8).

5. The automobile NVH test auxiliary device according to claim 1, characterized in that: A sound pressure sensor (19) is embeddedly mounted on the lower surface of the I-shaped guide seat (8), two support blocks (20) are arranged on the lower surface of the I-shaped guide seat (8) and on one side of the sound pressure sensor (19), a rotating rod (21) is rotatably arranged between the two support blocks (20), an adjusting block (22) is fixedly arranged on the outer part of the rotating rod (21), an adjusting rod (23) is fixedly arranged on the bottom of the adjusting block (22), a ball hinge seat (24) is arranged on the bottom of the adjusting rod (23), a swinging rod (25) is connected to the bottom of the ball hinge seat (24), a knocking ball (26) is mounted on the bottom end of the swinging rod (25), and one end of the rotating rod (21) is provided with a second micro servo motor (27).

6. The automobile NVH test auxiliary device according to claim 5, characterized in that: The second micro servo motor (27) is fixedly installed on the outer wall of the corresponding support block (20), and the output end of the second micro servo motor (27) is fixedly connected with the rotating rod (21).

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