Ball screw NVH testing mechanism

Abstract

The utility model discloses a ball screw NVH (Noise Vibration and Harshness) testing mechanism, which relates to the technical field of NVH testing, and comprises a workbench, a vibration isolation structure, a damping mechanism, a clamping mechanism, a supporting mechanism, a positioning mechanism and a testing mechanism, the vibration isolation structure is arranged at the top end of the workbench, the damping mechanism is arranged at the top end of the workbench, the clamping mechanism is used for positioning a ball screw, and the supporting mechanism is used for supporting the ball screw. The supporting mechanism is arranged at the top end of the workbench, the positioning mechanism is used for positioning a nut, and the testing mechanism is arranged above the workbench. According to the utility model, the vibration isolation groove is arranged, and marble is a material with high density, so that the workbench is not easily influenced by external vibration, when vibration waves are transmitted in the workbench and bypass the vibration isolation groove, the propagation path of the vibration waves is increased, and meanwhile, the phenomena of reflection, refraction and the like can be generated when the vibration waves bypass the vibration isolation groove; the phenomenon further consumes the energy of the vibration wave, thereby achieving the vibration isolation effect, and guaranteeing the testing stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to NVH test technical field, especially related to ball screw NVH test mechanism. BACKGROUND

[0002] Ball screw is a kind of high-precision, high-efficiency transmission element, ball screw is the shaft with thread raceway, mainly is converted into linear motion for rotary motion.

[0003] Ball screw is a component widely used in mechanical engineering, and its performance directly affects the efficiency and service life of equipment, so ball screw will be tested for NVH, but in the present test process, the fixed end of screw rod jumps too much, the vibration isolation mode is poor, and the external interference affects the test to produce normal vibration noise signal anomaly and fatigue test is not accurate, thereby the stability and accuracy of test are reduced, for this, we propose ball screw NVH test mechanism. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing ball screw NVH test mechanism to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: ball screw NVH test mechanism, including:

[0006] Workbench;

[0007] Vibration isolation structure is arranged at the top of workbench;

[0008] Damping mechanism is arranged at the top of workbench;

[0009] Clamping mechanism is used for positioning ball screw;

[0010] Supporting mechanism is arranged at the top of workbench;

[0011] Positioning mechanism is used for positioning nut;

[0012] Test mechanism is arranged above workbench.

[0013] Preferably, the vibration isolation structure includes vibration isolation groove, the vibration isolation groove is opened in the top of workbench, and the material of the workbench is marble.

[0014] Preferably, the damping mechanism includes air floatation shock absorber, and the air floatation shock absorber is installed at the bottom of workbench.

[0015] Preferably, the clamping mechanism includes:

[0016] A pneumatic chuck is installed on the top end of the workbench.

[0017] A driven wheel is connected with the input end of the pneumatic chuck.

[0018] A servo motor is installed on the top end of the workbench.

[0019] A driving wheel is connected with the output end of the servo motor.

[0020] A belt is arranged between the driving wheel and the driven wheel.

[0021] Preferably, the supporting mechanism comprises:

[0022] A thimble;

[0023] A moving plate, the thimble is arranged on the front side of the moving plate;

[0024] A first cylinder is installed on the top end of the workbench, and the output end of the first cylinder is drivingly connected with the back side of the moving plate.

[0025] Preferably, the positioning mechanism comprises:

[0026] A clamping plate is arranged above the workbench, and the testing mechanism is arranged on the top end of the clamping plate;

[0027] A sliding seat is slidingly arranged on the top end of the workbench;

[0028] A fixing seat is fixedly connected with the top end of the workbench;

[0029] A second cylinder is installed on the back side of the fixing seat, and the output end of the second cylinder is drivingly connected with the back side of the sliding seat;

[0030] A limiting mechanism is arranged on the front side of the fixing seat.

[0031] Preferably, the testing mechanism comprises an NVH sensor, and the NVH sensor is installed on the top end of the clamping plate.

[0032] Preferably, the limiting mechanism comprises:

[0033] A third cylinder is installed on the front side of the fixing seat;

[0034] A limiting block, and the output end of the third cylinder is drivingly connected with the top end of the limiting block.

[0035] The technical effects and advantages of the utility model are as follows:

[0036] (1) The marble is a material with high density, so that the workbench is not easily affected by external vibration, when the vibration wave is transmitted in the workbench, the vibration wave propagation path is increased when passing through the vibration isolation groove, and reflection, refraction and other phenomena occur when passing through the vibration isolation groove, which further consumes the energy of the vibration wave, so that the effect of vibration isolation is achieved, and the stability of the test is ensured.

[0037] (2) The utility model discloses a gas floating shock absorber is set up, can support the workbench, also can shock absorption to the workbench, avoids the influence of external vibration to NVH test. DRAWINGS

[0038] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0039] Figure 2 It is the A place local amplification structure schematic diagram of the utility model. Figure 1

[0040] In the drawing: 101, workbench;201, vibration isolation groove;301, gas floating shock absorber;401, pneumatic chuck;402, driven wheel;403, servo motor;404, belt;501, moving plate;502, thimble;503, first air cylinder;601, clamping plate;602, sliding seat;603, fixed seat;604, second air cylinder;701, NVH sensor;801, third air cylinder;802, limit block. CONCRETE IMPLEMENTING METHODS

[0041] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0042] The utility model provides a ball screw NVH test mechanism as shown in Figures 1-2

[0043] Embodiment one:

[0044] Including workbench 101, vibration isolation structure, shock absorption mechanism, clamping mechanism, support mechanism, positioning mechanism and test mechanism, the vibration isolation structure is set up at the top of workbench 101, the shock absorption mechanism is set up at the top of workbench 101, the clamping mechanism is used for positioning ball screw, the support mechanism is set up at the top of workbench 101, the positioning mechanism is used for positioning nut, and the test mechanism is set up above workbench 101. ​​

[0045] The vibration isolation structure comprises a vibration isolation groove 201, which is arranged at the top end of the workbench 101. The workbench 101 is made of marble, which is a material with high density, so that the workbench 101 is not easily affected by external vibrations. When the vibration wave is transmitted in the workbench 101, the propagation path of the vibration wave is increased when passing around the vibration isolation groove 201. Meanwhile, reflection and refraction occur when passing around the vibration isolation groove 201, which further consumes the energy of the vibration wave, thereby achieving the effect of vibration isolation and ensuring the stability of the test.

[0046] The damping mechanism comprises an air floating shock absorber 301, which is installed at the bottom end of the workbench 101. The air floating shock absorber 301 can support and dampen the workbench 101, thereby avoiding the influence of external vibrations on the NVH test.

[0047] Embodiment two:

[0048] The workbench 101, the vibration isolation structure, the damping mechanism, the clamping mechanism, the supporting mechanism, the positioning mechanism and the testing mechanism are provided. The vibration isolation structure is arranged at the top end of the workbench 101. The damping mechanism is arranged at the top end of the workbench 101. The clamping mechanism is used for positioning the ball screw. The supporting mechanism is arranged at the top end of the workbench 101. The positioning mechanism is used for positioning the nut. The testing mechanism is arranged above the workbench 101.

[0049] The clamping mechanism comprises an air chuck 401, a driven wheel 402, a servo motor 403, a belt 404 and a driving wheel. The air chuck 401 is installed at the top end of the workbench 101. The driven wheel 402 is connected to the input end of the air chuck 401. The servo motor 403 is installed at the top end of the workbench 101. The driving wheel is connected to the output end of the servo motor 403. The belt 404 is arranged between the driving wheel and the driven wheel 402. The screw is inserted into the air chuck 401 for clamping. Then the servo motor 403 works to drive the driving wheel to rotate. Then the driven wheel 402 is driven to rotate under the connection of the belt 404, so as to drive the clamped screw of the air chuck 401 to rotate, and then the test is carried out.

[0050] The supporting mechanism comprises a thimble 502, a moving plate 501 and a first air cylinder 503, the thimble 502 is arranged on the front face of the moving plate 501, the first air cylinder 503 is installed on the top end of the workbench 101, the output end of the first air cylinder 503 is in transmission connection with the back face of the moving plate 501, the moving plate 501 is driven to move by the working of the first air cylinder 503, the thimble 502 is driven to move by the moving of the moving plate 501, until the thimble 502 abuts against one end of the lead screw, so that the one end of the lead screw away from the pneumatic chuck 401 is supported by the thimble 502, so that the lead screw does not appear the phenomenon of running away when rotating, thereby improving the stability of the lead screw detection.

[0051] The positioning mechanism comprises a clamping plate 601, a sliding base 602, a fixed seat 603, a second air cylinder 604 and a limiting mechanism, the clamping plate 601 is arranged above the workbench 101, the testing mechanism is arranged on the top end of the clamping plate 601, the sliding base 602 is slidingly arranged on the top end of the workbench 101, the bottom end of the fixed seat 603 is fixedly connected with the top end of the workbench 101, the second air cylinder 604 is installed on the back face of the fixed seat 603, the output end of the second air cylinder 604 is in transmission connection with the back face of the sliding base 602, the limiting mechanism is arranged on the front face of the fixed seat 603, the sliding base 602 is driven to move by the working of the second air cylinder 604, so that the clamping plate 601 is moved, thereby positioning the nut.

[0052] The testing mechanism comprises an NVH sensor 701, the NVH sensor 701 is installed on the top end of the clamping plate 601, the NVH sensor 701 can be used for NVH testing by the rotation of the lead screw.

[0053] The limiting mechanism comprises a third air cylinder 801 and a limiting block 802, the third air cylinder 801 is installed on the front face of the fixed seat 603, the output end of the third air cylinder 801 is in transmission connection with the top end of the limiting block 802, the limiting block 802 can be driven to work by the working of the third air cylinder 801.

[0054] Finally, it should be noted that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A ball screw NVH test mechanism, characterized by, Include: Workbench (101); Vibration isolation structure, the vibration isolation structure is arranged at the top end of the workbench (101); Damping mechanism, the damping mechanism is arranged at the top end of the workbench (101); Clamping mechanism, the clamping mechanism is used for positioning ball screw; Supporting mechanism, the supporting mechanism is arranged at the top end of the workbench (101); Positioning mechanism, the positioning mechanism is used for positioning nut; Test mechanism, the test mechanism is arranged above the workbench (101).

2. The ball screw NVH test mechanism of claim 1, wherein, The vibration isolation structure includes a vibration isolation groove (201) opened at the top end of the workbench (101), and the workbench (101) is made of marble.

3. The ball screw NVH test mechanism of claim 1, wherein, The damping mechanism includes a gas floating shock absorber (301) installed at the bottom end of the workbench (101).

4. The ball screw NVH test mechanism of claim 1, wherein, The clamping mechanism includes: Air chuck (401), the air chuck (401) is installed at the top end of the workbench (101); Driven wheel (402), the driven wheel (402) is connected with the input end of the air chuck (401); Servo motor (403), the servo motor (403) is installed at the top end of the workbench (101); Driving wheel, the driving wheel is connected with the output end of the servo motor (403); Belt (404), the belt (404) is arranged between the driving wheel and the driven wheel (402).

5. The ball screw NVH test mechanism of claim 1, wherein, The supporting mechanism includes: Thimble (502); Moving plate (501), the thimble (502) is arranged on the front of the moving plate (501); First air cylinder (503), the first air cylinder (503) is installed at the top end of the workbench (101), and the output end of the first air cylinder (503) is drivingly connected with the back of the moving plate (501).

6. The ball screw NVH test mechanism of claim 1, wherein, The positioning mechanism includes: Clamping plate (601), the clamping plate (601) is arranged above the workbench (101), and the test mechanism is arranged at the top end of the clamping plate (601); Slide (602), the slide (602) is slidingly arranged at the top end of the workbench (101); Fixed seat (603), the bottom end of the fixed seat (603) is fixedly connected with the top end of the workbench (101); Second air cylinder (604), the second air cylinder (604) is installed at the back of the fixed seat (603), and the output end of the second air cylinder (604) is drivingly connected with the back of the slide (602); Limiting mechanism, the limiting mechanism is arranged on the front of the fixed seat (603).

7. The ball screw NVH test mechanism of claim 6, wherein, The test mechanism includes an NVH sensor (701) installed at the top end of the clamping plate (601).

8. The ball screw NVH test mechanism of claim 6, wherein, The limiting mechanism includes: Third air cylinder (801), the third air cylinder (801) is installed on the front of the fixed seat (603); Limiting block (802), the output end of the third air cylinder (801) is drivingly connected with the top end of the limiting block (802).

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