CN216247238U - Vehicle body free modal test tool - Google Patents

Abstract

The utility model discloses a vehicle body free modal test tool which comprises a base, wherein one side of the base is symmetrically and fixedly connected with supporting plates, the end parts of the two supporting plates are rotatably connected with a rotating shaft through bearings, a V-shaped plate is sleeved on the rotating shaft, one end of the V-shaped plate is fixedly connected with a fixed rod, one end of the fixed rod is fixedly connected with a hammer head, the lower part of the other end of the V-shaped plate can be in contact connection with a cam, the cam is fixedly connected with an output shaft of a motor II, a spring is fixedly connected below one end of the V-shaped plate far away from the cam, the other end of the spring is fixedly connected with the base, the motor II is arranged above the base through a supporting table and is provided with the fixed plate, a moving mechanism is arranged on the fixed plate, a hydraulic telescopic rod is fixedly connected onto the moving mechanism, and the output end of the hydraulic telescopic rod is fixedly connected with the base. The cam is driven to rotate through the second motor, the cam acts on the V-shaped plate to enable the hammer head to rotate to automatically knock the vehicle body, and the rotating speed of the second motor can adjust the knocking force, so that time and labor are saved, and the vehicle is convenient to use.

Description

Vehicle body free modal test tool

Technical Field

The utility model relates to the technical field of tools, in particular to a tool for a free modal test of a vehicle body.

Background

Along with the rapid development of the automobile industry, the annual growth rate of automobiles is higher and higher, and people pay more attention to the requirements of safety, reliability and low oil consumption as well as the requirements of noise, vibration and sound vibration roughness. The NVH (Noise, Vibration and Harshness) performance of the automobile body, which is used as a main part of an automobile, directly affects the satisfaction degree of a customer on the whole automobile, so the NVH performance of the automobile body is particularly important.

In the free mode test process of the vehicle body, the vehicle body is firstly hung, a power vibration exciter is installed to excite the vehicle sound response, the vehicle body is drawn with grid points and connected with computer software to form signals, an excitation signal is sent out in the fourth step, the signals are collected through a hammering method generally, and a vehicle sound mode graph is fitted.

When an excitation signal is sent, people generally hold the awl to knock the car body, so that time and labor are wasted, fatigue is easy to occur, knocking force is not easy to control, and accuracy of a test result is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the prior art, a free mode test tool for a vehicle body is provided to solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a free mode test tool for a vehicle body comprises a base, wherein supporting plates are symmetrically and fixedly connected to one side of the base, the end parts of the two supporting plates are rotatably connected with a rotating shaft through bearings, the rotating shaft is sleeved with a V-shaped plate, one end of the V-shaped plate is fixedly connected with a fixed rod, one end of the fixed rod is fixedly connected with a hammer head, the lower part of the other end of the V-shaped plate is in contact connection with a cam, the cam is fixedly connected with an output shaft of a motor II, a spring is fixedly connected below one end of the V-shaped plate far away from the cam, the other end of the spring is fixedly connected with the base, the second motor is arranged on the base through a supporting platform, the improved multifunctional lifting device is characterized in that a fixed plate is arranged above the base, a moving mechanism is arranged on the fixed plate, a hydraulic telescopic rod is fixedly connected to the moving mechanism, and the output end of the hydraulic telescopic rod is fixedly connected to the base.

Preferably, the moving mechanism comprises a screw rod, two ends of the screw rod are connected to the fixed plate through bearings, a moving block is connected to the screw rod through threads, and the bottom end of the moving block is fixedly connected with the hydraulic telescopic rod.

Preferably, one end of the fixing plate is fixedly connected with a first motor, and an output shaft of the first motor is fixedly connected to one end of the screw rod.

Preferably, the outer walls of the two sides of the moving block are fixedly connected with sliding blocks, the inner walls of the two sides of the fixed plate are provided with sliding grooves, and the sliding blocks are slidably connected with the sliding grooves.

Preferably, the outer walls of the two sides of the fixing plate are fixedly connected with symmetrically distributed fixing lugs, and threaded holes are formed in the outer portions of the fixing lugs.

Preferably, the outer wall of one side of the fixing lug is fixedly provided with a fixing pad, and the fixing pad is made of rubber.

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

1. this be used for automobile body free mode test frock through being provided with motor two, its motor that is adjustable speed, and motor two drives the cam and rotates, and the cam acts on the V-arrangement board and makes its upwards rotate, can make the tup rotate downwards and beat the automobile body, realizes automatic beating, and the rotational speed of motor two can adjust beating power degree, and labour saving and time saving is more convenient, improves the test result accuracy.

2. This be used for automobile body free mode test frock through being provided with moving mechanism, can remove about the position of tup, and then can make it beat different automobile body positions.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

fig. 1 is a schematic view of an overall structure of a vehicle body free mode test tool provided by the utility model;

fig. 2 is a schematic structural diagram of a base of a vehicle body free mode test tool provided by the utility model;

fig. 3 is a schematic top view of a free mode test fixture for a vehicle body according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base; 2. a hammer head; 3. a fixing plate; 4. fixing the ear; 5. a moving block; 6. a first motor; 7. a hydraulic telescopic rod; 8. fixing the rod; 9. a V-shaped plate; 10. a cam; 11. a second motor; 12. a support plate; 13. a spring; 14. a screw rod; 15. a slide block.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model. The utility model is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, in the embodiment of the utility model, a vehicle body free mode test tool comprises a base 1, support plates 12 are symmetrically and fixedly connected to one side of the base 1, the end portions of the two support plates 12 are rotatably connected with a rotating shaft through bearings, a V-shaped plate 9 is sleeved on the rotating shaft, a fixing rod 8 is fixedly connected to one end of the V-shaped plate 9, a hammer 2 is fixedly connected to one end of the fixing rod 8, a cam 10 can be in contact connection with the lower portion of the other end of the V-shaped plate 9, the cam 10 is fixedly connected to an output shaft of a motor II 11 and is far away from the cam 10, v-arrangement board 9 one end below fixedly connected with spring 13, spring 13's other end fixed connection is in base 1, and on base 1 was located through the brace table to motor two 11, the top of base 1 was equipped with fixed plate 3, is equipped with moving mechanism on the fixed plate 3, and fixedly connected with hydraulic telescoping rod 7 on the moving mechanism, hydraulic telescoping rod 7's output fixed connection was in base 1. The second motor 11 is a speed-adjustable motor, one end of an output shaft of the second motor 11 is fixedly connected with a cam 10, the cam 10 is in contact with one side of the bottom end of the V-shaped plate 9, the other side of the bottom end of the V-shaped plate 9 is fixedly connected with a spring 13 together with the top end of the base 1, the hammer head 2 is limited, the hammer head is kept in a horizontal state under the action of no external force, the second motor 11 drives the cam 10 to rotate, the cam 10 acts on the V-shaped plate 9 to enable the V-shaped plate 9 to rotate upwards, the hammer head 2 can rotate downwards to beat a vehicle body, automatic beating is achieved, the rotating speed of the second motor 11 can be adjusted according to beating force, time and labor are saved, the speed is convenient to use, and accuracy of a test result is improved.

The moving mechanism comprises a lead screw 14, two ends of the lead screw 14 are connected to the fixed plate 3 through bearings, a moving block 5 is connected to the lead screw 14 through threads, and the bottom end of the moving block 5 is fixedly connected with the hydraulic telescopic rod 7. The screw rod 14 is rotated to further act on the moving block 5, so that the moving block 5 can move left and right, namely the position of the hammer head 2 can be moved left and right.

One end of the fixing plate 3 is fixedly connected with a first motor 6, and an output shaft of the first motor 6 is fixedly connected with one end of the screw rod 14. The first motor 6 drives the screw rod 14 to rotate.

The equal fixedly connected with slider 15 of both sides outer wall of movable block 5, the both sides inner wall of fixed plate 3 all is equipped with the spout, slider 15 sliding connection in spout. The sliding block 15 and the sliding groove form sliding fit, the moving block 5 is limited, and the stability of the moving block 5 is improved.

The equal fixedly connected with symmetric distribution's of both sides outer wall of fixed plate 3 fixed ear 4, the outside of fixed ear 4 is equipped with the screw hole, the installation of being convenient for.

The fixed bolster that is equipped with of one side outer wall of fixed ear 4, the material of bolster is rubber, increases the stability of installation.

The working principle of the utility model is as follows:

the device is installed in the proper position of the tool through the fixing lug 4, the vehicle body is hoisted in the proper position of the tool, when the vehicle body needs to be tested, namely, when the vehicle body is knocked, the motor II 11 is started, the motor II 11 drives the cam 10 to rotate, the cam 10 acts on the V-shaped plate 9 to enable the V-shaped plate 9 to rotate upwards, the hammer head 2 can rotate downwards to knock the vehicle body, automatic knocking is achieved, the knocking is reset under the action of the spring 13 after knocking, the rotating speed of the motor II 11 can adjust the knocking force, namely, the knocking force is larger as the rotating speed is higher, the knocking force is smaller as the rotating speed is lower, the motor I6 drives the screw rod 14 to rotate, the moving block 5 is further acted, the moving block 5 can be moved left and right, namely, the position of the hammer head 2 can be moved left and right, and the hydraulic telescopic rod 7 is matched, and the vehicle body knocking test in different positions can be carried out.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a car body free modal test frock, includes base (1), its characterized in that, one side symmetry fixed connection backup pad (12) of base (1), two the tip of backup pad (12) is rotated through the bearing and is connected with the pivot, the cover is equipped with V-arrangement board (9) in the pivot, the one end fixedly connected with dead lever (8) of V-arrangement board (9), the one end fixedly connected with tup (2) of dead lever (8), cam (10) is connected in the contact of the other end below of V-arrangement board (9), cam (10) fixed connection is in the output shaft of motor two (11), keeps away from cam (10), V-arrangement board (9) one end below fixedly connected with spring (13), the other end fixed connection of spring (13) in base (1), motor two (11) are located through a supporting bench on base (1), the upper portion of base (1) is equipped with fixed plate (3), be equipped with moving mechanism on fixed plate (3), last fixedly connected with hydraulic telescoping rod (7) of moving mechanism, the output end fixed connection of hydraulic telescoping rod (7) in base (1).

2. The tooling for the free mode test of the vehicle body according to claim 1, wherein the moving mechanism comprises a lead screw (14), both ends of the lead screw (14) are connected to the fixed plate (3) in a bearing mode, a moving block (5) is connected to the lead screw (14) in a threaded mode, and the bottom end of the moving block (5) is fixedly connected with the hydraulic telescopic rod (7).

3. The tooling for the free mode test of the vehicle body according to claim 2, wherein one end of the fixed plate (3) is fixedly connected with a first motor (6), and an output shaft of the first motor (6) is fixedly connected with one end of the screw rod (14).

4. The tool for testing the free modal of the vehicle body according to claim 3, wherein sliding blocks (15) are fixedly connected to the outer walls of the two sides of the moving block (5), sliding grooves are formed in the inner walls of the two sides of the fixed plate (3), and the sliding blocks (15) are slidably connected to the sliding grooves.

5. The tooling for the free mode test of the vehicle body according to claim 4, wherein the outer walls of two sides of the fixing plate (3) are fixedly connected with symmetrically distributed fixing lugs (4), and the outer parts of the fixing lugs (4) are provided with threaded holes.

6. The tooling for the free mode test of the vehicle body according to claim 5, wherein a fixing pad is fixedly arranged on the outer wall of one side of the fixing lug (4), and the fixing pad is made of rubber.

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