CN217384714U

CN217384714U - Automobile NVH test auxiliary device

Info

Publication number: CN217384714U
Application number: CN202123270247.XU
Authority: CN
Inventors: 龚华春
Original assignee: Shanghai Xinyi Industrial Co ltd
Current assignee: Shanghai Xinyi Industrial Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-09-06
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses an experimental auxiliary device of car NVH belongs to the experimental technical field of car performance, this experimental auxiliary device of car NVH, including supporting mechanism, the chassis is installed with adjustable the last position of supporting mechanism, the chassis includes the section bar frame, the cell body has been seted up to the bottom of section bar frame, the lead screw that slides is installed to the inner wall of cell body, be provided with drive assembly on the lead screw that slides, drive assembly includes the interlock platform, the bottom embedding of interlock platform has acoustic pressure sensor, the mount pad is installed to one side of interlock platform, the bottom demountable installation of mount pad has the regulation pole, it keeps away from to adjust the pole the one end of mount pad is provided with the ball hinge seat. The chassis moves integrally through the connecting rod piece on the supporting mechanism, the driving platform can move through the sliding lead screw, the sound pressure sensor further moves, the sound pressure sensor approaches to the position where abnormal sound occurs, and the position of abnormal sound of the frame can be traced conveniently.

Description

Automobile NVH test auxiliary device

Technical Field

The utility model belongs to the technical field of the car performance test, concretely relates to experimental auxiliary device of car NVH.

Background

English acronyms for Noise, Vibration and Harshness (Noise, Vibration, Harshness). This is a comprehensive measure of the quality of a vehicle's manufacture and gives the vehicle user the most immediate and surface experience. The NVH problem of vehicles is one of the concerns of large vehicle manufacturing enterprises and part enterprises in the international automobile industry. Statistics show that 1/3 failure problem of the whole automobile is related to NVH problem of the automobile, and nearly 20% of research and development cost of each large company is consumed for solving the NVH problem of the automobile.

NVH performance test, generally place test vehicle or frame on shaking table frame, in road conditions such as indoor simulation tortuous road, washboard way, deep hole way to for the vehicle provides the experimental conditions of different road conditions running state and different humiture environmental changes, thereby arouse various reasons that probably produce the abnormal sound.

And when abnormal sound is generated or noise abnormal points exist, the position of the abnormal sound or the abnormal points needs to be determined, a plurality of sensors are often arranged to initially capture the abnormal points, and then the installation positions of the sensors are further moved to enable the sensors to approach the abnormal sound points, so that the specific position of the abnormal source is obtained, and the reason for the abnormal sound is further determined.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an experimental auxiliary device of car NVH to propose the problem of the experimental auxiliary device of current car NVH in the use in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: experimental auxiliary device of car NVH, including supporting mechanism, the chassis is installed with adjustable supporting mechanism upper position, the chassis includes the section bar frame, the cell body has been seted up to the bottom of section bar frame, the lead screw that slides is installed to the inner wall of cell body, be provided with drive assembly on the lead screw that slides, drive assembly includes the interlock platform, the bottom embedding of interlock platform has sound pressure sensor, the drive table is installed to one side of interlock platform, the bottom demountable installation of drive table has the regulation pole, it keeps away from to adjust the pole the one end of drive table is provided with the ball hinge seat, the ball hinge seat is connected with the swinging arms, the hammering hammer is installed to the bottom of swinging arms.

Preferably, the end of the section bar frame is provided with a clamping frame.

Preferably, the top of the section bar frame is optionally provided with a geometrical frame.

Preferably, one end of the clamping frame, which is far away from the section bar frame, is provided with a sliding seat.

Preferably, the supporting mechanism is arranged at both ends of the underframe.

Preferably, the support means comprises a connecting rod.

Preferably, the connection rod piece is movably installed inside the sliding seat.

Preferably, both ends of the connecting rod piece are provided with mounting seats.

Preferably, the bottom of the mounting seat is provided with a telescopic rod.

Preferably, a plurality of adjusting rods are optionally arranged on the driving platform.

Compared with the prior art, the beneficial effects of the utility model are that:

when abnormal sound occurs in the whole vehicle test, the sound pressure sensor measures noise, the chassis moves integrally through the connecting rod piece on the supporting mechanism, the driving platform can move through the sliding lead screw, the sound pressure sensor further moves, the sound pressure sensor approaches to the position where the abnormal sound occurs, and the position of the abnormal sound of the vehicle frame can be traced conveniently.

The adjusting rod is arranged at the bottom of the driving table, the spherical hinge seat is arranged at the tail end of the adjusting rod, the swinging rod drives the knocking hammer to knock the bottom of the frame, a knocking test is carried out, and meanwhile, the sound pressure sensor is used for obtaining corresponding test data.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the bottom frame structure of the present invention;

fig. 3 is another angle structure diagram of the bottom frame of the present invention;

fig. 4 is a schematic structural view of the transmission assembly of the present invention;

fig. 5 is a schematic structural diagram of the supporting mechanism of the present invention.

In the figure: 1. a chassis; 11. a section bar frame; 12. a clamping frame; 13. sliding the lead screw; 2. a transmission assembly; 21. a linkage table; 22. a drive stage; 23. a sound pressure sensor; 24. adjusting a rod; 25. a spherical hinge seat; 26. a swing lever; 27. knocking hammers; 3. a table-shaped frame; 4. a support mechanism; 41. a telescopic rod; 42. connecting the rod pieces.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: experimental auxiliary device of car NVH, including supporting mechanism 4, install chassis 1 with adjustable position on the supporting mechanism 4, chassis 1 includes section bar frame 11, the cell body has been seted up to section bar frame 11's bottom, the lead screw 13 that slides is installed to the inner wall of cell body, be provided with drive assembly 2 on the lead screw 13 that slides, drive assembly 2 includes interlock platform 21, the bottom embedding of interlock platform 21 has sound pressure sensor 23, drive table 22 is installed to one side of interlock platform 21, drive table 22's bottom demountable installation has regulation pole 24, the one end of adjusting pole 24 and keeping away from drive table 22 is provided with ball hinge seat 25, ball hinge seat 25 is connected with swinging arms 26, striking hammer 27 is installed to the bottom of swinging arms 26.

In this embodiment, when abnormal sound occurs in the entire car test, the sound pressure sensor 23 measures noise, the connecting rod 42 on the supporting mechanism 4 moves the chassis 1 as a whole, the driving table 22 can move through the sliding screw 13, and the sound pressure sensor 23 is further moved, so that the sound pressure sensor 23 approaches the position where the abnormal sound occurs.

The bottom of the driving table 22 is provided with an adjusting rod 24, the tail end of the adjusting rod 24 is provided with a spherical hinge seat 25, the swinging rod 26 drives a knocking hammer 27 to knock the bottom of the frame, a knocking test is carried out, and meanwhile, the sound pressure sensor 23 is used for obtaining corresponding test data.

The adjusting lever 24 is articulated on the drive table 22 by means of a side frame which can be screwed to the drive table 22.

The swing rod 26 can rotate at multiple angles through the spherical hinge seat 25, so that the multi-angle knocking test for the vehicle frame is facilitated.

Specifically, the end of the profile frame 11 is provided with a clamping frame 12.

In this embodiment, the engaging frame 12 is in the shape of a barb and is configured to be disposed on the supporting mechanism 4, and the engaging frame 12 is located at the head and tail of the vehicle.

In particular, the top of the profile frame 11 is optionally provided with a geometric frame 3.

In this embodiment, can be through several shape frame 3 with section bar frame 11 fixed mounting in the bottom of frame, be convenient for carry out the knock test alone, move along with the frame, knock hammer 27 can multidirectional knocking, tests.

Specifically, one end of the clamping frame 12, which is far away from the section bar frame 11, is provided with a sliding seat.

In this embodiment, the sliding seat may be a lead screw sleeve, and the connecting rod 42 is a lead screw.

Specifically, the supporting mechanism 4 is disposed at both ends of the chassis 1.

In the present embodiment, the support mechanism 4 supports the underframe 1 so as to be able to be located at the bottom of the vehicle.

In particular, the support means 4 comprise a connecting rod 42.

In this embodiment, the connection rod 42 is a lead screw.

Specifically, the connecting rod 42 is movably mounted inside the sliding seat.

In this embodiment, the sliding seat is a screw sleeve, and the connecting rod 42 is a screw.

Specifically, the two ends of the connection rod 42 are provided with mounting seats.

In this embodiment, the mounting seat is used for mounting the connection rod 42.

Specifically, the bottom of the mounting seat is provided with a telescopic rod 41.

In this embodiment, the telescopic rod 41 can drive the bottom frame 1 to ascend or descend, so as to adapt to the heights of different vehicle frames.

Specifically, a plurality of adjusting rods 24 are optionally arranged on the driving platform 22.

In this embodiment, the adjusting rod 24, the spherical hinge seat 25 at the bottom, the swinging rod 26, and the knocking hammer 27 may be correspondingly provided in multiple sets.

The utility model discloses a theory of operation and use flow: when abnormal sound occurs in a finished automobile test, the sound pressure sensor 23 measures noise, the telescopic rod 41 can drive the underframe 1 to ascend or descend to adapt to the heights of different automobile frames, the underframe 1 can integrally move through the connecting rod piece 42 on the supporting mechanism 4, the driving platform 22 can move through the sliding lead screw 13, the sound pressure sensor 23 further moves, the sound pressure sensor 23 approaches to the position where the abnormal sound occurs, the adjusting rod 24 is arranged at the bottom of the driving platform 22, the spherical hinge seat 25 is arranged at the tail end of the adjusting rod 24, the swinging rod 26 drives the knocking hammer 27 to knock the bottom of the automobile frame, a knocking test is performed, and meanwhile the sound pressure sensor 23 is used for acquiring corresponding test data.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Experimental auxiliary device of car NVH, its characterized in that: comprises a supporting mechanism (4), an underframe (1) is arranged on the supporting mechanism (4) in an adjustable way, the underframe (1) comprises a section bar frame (11), the bottom of the section bar frame (11) is provided with a groove body, a sliding lead screw (13) is arranged on the inner wall of the groove body, a transmission component (2) is arranged on the sliding lead screw (13), the transmission assembly (2) comprises a linkage table (21), a sound pressure sensor (23) is embedded in the bottom of the linkage table (21), a driving platform (22) is arranged on one side of the linkage platform (21), an adjusting rod (24) is detachably arranged at the bottom of the driving platform (22), one end of the adjusting rod (24) far away from the driving platform (22) is provided with a spherical hinge seat (25), the spherical hinge seat (25) is connected with a swing rod (26), and the bottom of the swing rod (26) is provided with a knocking hammer (27).

2. The automotive NVH test auxiliary device according to claim 1, wherein: and a clamping frame (12) is arranged at the end part of the section bar frame (11).

3. The automotive NVH test auxiliary device according to claim 2, wherein: the top of the section bar frame (11) is optionally provided with a geometric frame (3).

4. The automotive NVH test auxiliary device according to claim 2, wherein: one end of the clamping frame (12) far away from the section bar frame (11) is provided with a sliding seat.

5. The automotive NVH test auxiliary device according to claim 1, wherein: the two ends of the underframe (1) are provided with the supporting mechanisms (4).

6. The automotive NVH test auxiliary device according to claim 4, wherein: the support means (4) comprise a connecting rod (42).

7. The automotive NVH test auxiliary device according to claim 6, wherein: the connecting rod piece (42) is movably arranged in the sliding seat.

8. The automotive NVH test auxiliary device according to claim 7, wherein: and mounting seats are arranged at two ends of the connecting rod piece (42).

9. The automotive NVH test auxiliary device according to claim 8, wherein: and a telescopic rod (41) is installed at the bottom of the installation seat.

10. The automotive NVH test auxiliary device according to claim 1, wherein: the driving table (22) is optionally provided with a plurality of adjusting rods (24).