Automobile idle speed NVH experiment device

Abstract

The invention discloses an automobile idle speed NVH experiment device, which comprises a base and a microphone, the microphone is used for collecting noise, the top of the base is provided with a fixing mechanism, and the bottom of the base is provided with a supporting mechanism for supporting the microphone; the fixing mechanism comprises an adjusting assembly and a fixing clamp, the microphone is installed on the fixing mechanism through the fixing clamp, the adjusting assembly comprises a locking module and a plurality of sleeves, telescopic openings are formed in the tops of the sleeves, supporting rods are arranged at the positions, at the telescopic openings, of the sleeves, the supporting rods are metal shaping hoses, and the supporting rods and the sleeves are locked through the locking module. The supporting mechanism comprises an adjusting assembly and a plurality of supporting pieces. After the microphone is clamped and fixed through the fixing clamp, the microphone is supported through the supporting rod made of the metal shaping hose, and the supporting rod can be telescopically adjusted in the sleeve, so that flexible adjustment of the microphone can be realized; therefore, the positions and the states of a plurality of microphones can be respectively adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of automobile NVH experiments, and in particular to an automobile idling NVH experiment device. Background Art

[0002] NVH is the abbreviation of Noise, Vibration and Harshness. It is a comprehensive issue to measure the quality of automobile manufacturing. It gives car users the most direct and superficial experience.

[0003] When the engine is idling, the NVH phenomenon of the vehicle body caused by the excitation force of the engine represents the most basic NVH characteristics of the vehicle body. It is the basis for analyzing the NVH problems of other working conditions of the vehicle body. It is a necessary indicator when evaluating a newly developed vehicle. At present, the NVH test of the whole vehicle at idle speed is often completed in a semi-anechoic chamber, and professional acoustic test microphones are installed in various parts of the vehicle to test the NVH situation in the vehicle.

[0004] After searching, the Chinese invention patent with publication number CN106247111B discloses a noise test bracket, including a base with a mounting hole; a vertical rod, one end of which is inserted into the mounting hole of the base; a microphone mounting structure, the microphone mounting structure includes a tubular structure and a microphone clamping structure arranged perpendicular to the tubular structure, and the vertical rod passes through the tubular structure; a ruler, one end of the ruler is connected to the microphone mounting structure, and the microphone mounting structure and the ruler can move up and down along the vertical rod. This application uses a supporting structure and an arc-shaped structure to support and clamp the microphone respectively, and performs in-car noise testing by adjusting the positional relationship between the microphone and the car exhaust port. However, in addition to this, the noise conditions at the headrest of the car seat can more accurately reflect the impact of the vehicle's NVH performance on the driver or passengers. Therefore, it is necessary to adjust multiple microphones in different forms to conduct more accurate testing. The device is not flexible enough in adjusting the microphone, so it is difficult to achieve a reasonable arrangement of the microphone in the car. In addition, when the microphone is in the car, the jitter of the vehicle at idle speed may cause the microphone to be unstable and cause it to vibrate and generate additional noise, which will lead to inaccurate test results. Summary of the invention

[0005] In view of the above-mentioned prior art, the present invention provides a vehicle idling NVH test device, and the main technical problem to be solved is how to ensure the flexibility and stability of the microphone after being installed in the vehicle.

[0006] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0007] A vehicle idling NVH test device comprises a base and a microphone, wherein the microphone is used to collect noise, a fixing mechanism is provided on the top of the base, and a supporting mechanism is provided on the bottom of the base for supporting the microphone;

[0008] The fixing mechanism includes an adjusting component and a fixing clamp, and the fixing mechanism installs the microphone through the fixing clamp, the adjusting component includes a locking module and a plurality of sleeves, a telescopic opening is provided on the top of the sleeve, and a support rod is provided at the telescopic opening of the sleeve, the support rod is a metal shaped hose, and the support rod is locked with the sleeve through the locking module, the supporting mechanism includes an adjusting component and a plurality of supporting sheets, the adjusting component is used to adjust the opening and closing of the plurality of supporting sheets, the supporting sheet includes a sheet body and a supporting foot, a plurality of ribs for anti-slip are provided on the inner side of the supporting foot, and a skeleton for maintaining the supporting strength is provided inside the supporting foot.

[0009] Furthermore, several sleeves are equidistantly fixedly connected to the outer side of the top end of the base, and the locking module includes a connecting block, which is located inside the sleeve, and sliding grooves are provided on the front and rear sides of the connecting block. The inner walls on both sides of the sleeve are fixedly connected with guide rails, and the two guide rails are slidably connected to the connecting block at two sliding grooves respectively.

[0010] Furthermore, there are card slots on both sides of the connecting block, both card slots are "L"-shaped, and the two card slots are centrally symmetrical. The card slots include vertical slots and transverse slots, and the connecting block is fixedly connected to the top inner wall and the bottom inner wall of the transverse slot with a protrusion, the material of the protrusion is rubber, and the protrusion is hemispherical.

[0011] Furthermore, a fixing ring is rotatably connected to the outer side of the top end of the sleeve, and the inner walls on both sides of the fixing ring are fixedly connected to limit piles. The top ends of both sides of the sleeve are provided with strip openings on the inner side of the fixing ring, and two limit piles extend to the interior of the sleeve at the two strip openings respectively, and the two limit piles are respectively adapted to the two slots.

[0012] Furthermore, the fixing clamp includes two clips, the top ends of the two clips are respectively fixedly connected with a connecting belt and a connecting ring, the connecting ring is a self-adhesive Velcro, the belt body of the connecting ring passes through the connecting belt, and one end of the connecting ring is externally fixedly connected to a limiting block, and the diameter of the limiting block is larger than the gap width of the connecting ring.

[0013] Furthermore, the two clips are rotatably connected to both sides of the top of the support rod, and pads are fixedly connected to the inner bottom ends of the two support rods. The materials of the two pads are rubber, and the two pads are semi-cylindrical. The top of the support rod is fixedly connected to a ring between the two clips, and the material of the ring is rubber.

[0014] Furthermore, the adjustment assembly includes a threaded rod, which is rotatably connected to the middle part of the bottom end of the base, a knob is fixedly connected to the bottom end of the threaded rod, and a threaded sleeve is connected to the outer thread of the threaded rod, and a plurality of support plates are rotatably connected to the outer side of the bottom end of the base at equal intervals, and a connecting rod is rotatably connected between each support plate and the threaded sleeve.

[0015] Furthermore, the support legs are fixedly connected to the bottom end of the sheet body, and the materials of the support legs and the ribs are both rubber, and the skeleton includes a plurality of spring wires arranged in a staggered manner horizontally and vertically.

[0016] Furthermore, the top end of the base is fixedly connected to a telescopic tube sleeve at the outer side of the sleeve, and the top end of the telescopic tube sleeve is fixedly connected to a drawstring bag.

[0017] The beneficial effects of the present invention are:

[0018] 1. After the device uses a fixing clamp to clamp and fix the microphone, it supports it through a support rod made of a metal shaped hose. Since the support rod can be telescopically adjusted in the sleeve, the microphone can be flexibly adjusted. By adopting a plurality of the above structures, the positions and states of a number of microphones can be adjusted respectively. In addition, the device can use the support sheet to support after the support sheet is adjusted to open outward. Since the ribs and skeleton on the support feet can respectively provide the effects of increasing friction and maintaining support strength, the device can provide stable support and shock-absorbing buffering effects for the microphone, making its installation more stable and safe, thereby ensuring the accuracy and reliability of the test results.

[0019] 2. During the installation and removal of the microphone from the fixing clip, the ring can wrap it, so the rubber ring can provide increased friction and cushioning effect for the microphone. This not only provides an extra layer of protection for the microphone during installation and removal, preventing it from falling directly after the fixing clip is loosened, but also ensures that the microphone will not be over-squeezed when the fixing clip is clamped, thereby maintaining the stability of the microphone during installation;

[0020] 3. After using the device and removing the microphone, you can pull the telescopic tube sleeve to wrap up the sleeve and the fixing clip, and then pull the drawstring of the drawstring bag to tighten its opening, so that the fixing clip can be sealed and stored. In this case, the fixing clip will not be contaminated with dust and dirt, thereby ensuring that the clamping of the microphone by the fixing clip will not cause damage or dirt to its surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a vehicle idling NVH test device in Example 1 of the present application;

[0022] Figure 2 A cross-sectional view of a sleeve of an automobile idle NVH test device in Example 1 of the present application;

[0023] Figure 3 A stereoscopic diagram of a connection block of an automobile idle NVH test device in Example 1 of the present application;

[0024] Figure 4 A three-dimensional diagram of a fixing clamp of a vehicle idle NVH test device in Example 1 of the present application;

[0025] Figure 5 A front view of a base of an automobile idle NVH test device in Example 1 of the present application;

[0026] Figure 6 An exploded view of the support leg of a vehicle idle NVH test device in Example 1 of the present application

[0027] Figure 7 This is a stereoscopic diagram of a vehicle idle NVH test device in Example 2 of the present application.

[0028] Description of Figure Numbers:

[0029] Base 1, sleeve 2, fixing ring 3, strut 4, fixing clamp 5, supporting plate 6, sheet body 601, supporting foot 602, rib 6021, frame 6022, limiting pile 7, connecting block 8, slide groove 801, protrusion 802, slot 803, guide rail 9, cushion block 10, collar 11, connecting belt 12, connecting ring 13, limiting block 14, microphone 15, threaded rod 16, threaded sleeve 17, knob 18, connecting rod 19, telescopic tube sleeve 20, drawstring bag 21. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0031] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] Example 1

[0033] See attached Figure 1-6 The present application provides a vehicle idling NVH test device, comprising a base 1 and a microphone 15, the microphone 15 is used to collect noise, the microphone 15 is a GRAS acoustic test microphone, a fixing mechanism for installing the microphone 15 is provided on the top of the base 1, and a supporting mechanism for supporting the microphone 15 is provided on the bottom of the base 1;

[0034] The fixing mechanism includes an adjusting component and a fixing clamp 5, and the fixing mechanism installs the microphone 15 through the fixing clamp 5. The microphone 15 is installed by clamping, which can ensure its convenient loading and unloading. Therefore, the microphone 15 can be disassembled after the detection is completed and stored separately to ensure its service life. It can also facilitate the calibration process of the microphone 15 before each use. The adjusting component includes a locking module and a plurality of sleeves 2. The top of the sleeve 2 is provided with a telescopic opening, and the sleeve 2 is provided with a support rod 4 at the telescopic opening. The support rod 4 is a metal shaped hose, and the support rod 4 is locked with the sleeve 2 through the locking module. The support rod 4 can realize telescopic adjustment with the sleeve 2 at the telescopic opening, thereby realizing the height adjustment of the fixing clamp 5. At the same time, with the characteristics of the metal shaped hose that can be freely bent and self-shaped, the installation position of the microphone 15 can be flexibly adjusted so that it can be accurately oriented. The headrest of the car seat is used to ensure the stability of the experimental process. The support mechanism includes an adjustment component and a plurality of support sheets 6. The adjustment component is used to adjust the opening and closing of the plurality of support sheets 6. When the support sheets 6 are opened, the truncated cone structure formed by the plurality of support sheets 6 can increase the bottom area of ​​the device, thereby allowing the device to obtain a more stable placement effect. The support sheet 6 includes a sheet body 601 and a support foot 602. The inner side surface of the support foot 602 is provided with a plurality of ribs 6021 for anti-slip, thereby further ensuring the stability of the placement of the device, and the interior of the support foot 602 is provided with a skeleton 6022 for maintaining the support strength. The skeleton 6022 can maintain the support strength of the support foot 602 to prevent the gravity of the device from excessively compressing the support foot 602 and causing it to deform, thereby ensuring the shock-absorbing and buffering effect that the rubber support foot 602 can provide for the device.

[0035] Preferably, several sleeves 2 are equidistantly fixedly connected to the outer side of the top end of the base 1, and the locking module includes a connecting block 8, which is located inside the sleeve 2, and slide grooves 801 are provided on the front and rear sides of the connecting block 8. The inner walls on both sides of the sleeve 2 are fixedly connected with guide rails 9, and the two guide rails 9 are slidingly connected to the connecting block 8 at two slide grooves 801 respectively. The guide rails 9 can provide a guiding effect for the connecting block 8 through the slide grooves 801, that is, the guide rails 9 can limit the rotation of the connecting block 8 so that it can only move in the vertical direction, thereby providing adjustment space for the telescopic adjustment between the support rod 4 and the sleeve 2, and making the telescopic adjustment smoother.

[0036] Preferably, both sides of the connecting block 8 are provided with a slot 803, and the two slots 803 are both "L"-shaped, and the two slots 803 are centrally symmetrical, and the slot 803 includes a vertical slot and a horizontal slot. When the connecting block 8 rises to the top in the sleeve 2, the limit pile 7 can enter the slot 803 from the vertical slot, and when the limit pile 7 is twisted and rotated, the limit pile 7 can enter the horizontal slot from the vertical slot. In this case, the limit pile 7 can be used to fix the connecting block 8 through the slot 803. The limit pile 7 is limited to keep the state after rising, so that only the state after the support rod 4 is raised and adjusted can be maintained, and the connecting block 8 is fixedly connected with a protrusion 802 at the top inner wall and the bottom inner wall of the transverse groove. The material of the protrusion 802 is rubber, and the protrusion 802 is hemispherical. When the limit pile 7 enters the transverse groove, the protrusion 802 can limit the limit pile 7, so that it will have a certain resistance when it leaves the transverse groove, thereby further ensuring the fixing effect of the limit pile 7 on the connecting block 8.

[0037] Preferably, a fixing ring 3 is rotatably connected to the outer side of the top end of the sleeve 2, and an anti-slip groove is provided on the outside of the fixing ring 3 or is coated with an anti-slip paint to ensure stable triggering when it is turned and rotated. Limiting piles 7 are fixedly connected to the inner walls of both sides of the fixing ring 3, and strip openings are provided on the inner side of the fixing ring 3 at the top ends of both sides of the sleeve 2. The length of the strip openings is slightly larger than the length of the above-mentioned transverse grooves. Two limiting piles 7 extend to the interior of the sleeve 2 at the two strip openings, respectively, and the two limiting piles 7 are respectively adapted to the two slots 803.

[0038] Preferably, the fixing clamp 5 includes two clips, the top ends of which are fixedly connected with a connecting belt 12 and a connecting ring 13, respectively. The connecting ring 13 is a self-adhesive Velcro. The belt body of the connecting ring 13 passes through the connecting belt 12, and one end of the connecting ring 13 is externally fixedly connected to a limiting block 14. The diameter of the limiting block 14 is larger than the pore width of the connecting ring 13. The connecting belt 12 maintains a state of passing through the connecting ring 13 and is prevented from detaching from the connecting ring 13 by the limiting block 14. Therefore, when adjusting the tightness of the two clips, there is no need to pull the connecting belt 12 to insert the connecting ring 13 every time.

[0039] Preferably, the two clips are rotatably connected to both sides of the top of the support rod 4, and pads 10 are fixedly connected to the inner bottom ends of the two support rods 4. The material of the two pads 10 is rubber, and the two pads 10 are semi-cylindrical. The pads 10 are used to push the microphone 15 so that it is located in the center of the fixing clamp 5 when the two clips are adjusted to be close to each other. In this case, the microphone 15 can obtain a better fixing effect. The top of the support rod 4 is fixedly connected with a ring 11 between the two clips. The material of the ring 11 is rubber. When installing the microphone 15, it can be inserted into the ring 11 first, and then the tightness of the fixing clamp 5 can be adjusted. There is no need to worry that the microphone 15 will loosen from the fixing clamp 5. After loosening the fixing clamp 5, since the ring 11 can still keep the microphone 15 in a restrained state, there is no risk of the microphone 15 falling off.

[0040] Preferably, the adjustment assembly includes a threaded rod 16, which is rotatably connected to the middle part of the bottom end of the base 1, and a knob 18 is fixedly connected to the bottom end of the threaded rod 16, and a threaded sleeve 17 is connected to the outer thread of the threaded rod 16, and a plurality of support plates 6 are rotatably connected to the outer side of the bottom end of the base 1 at equal intervals, and a connecting rod 19 is rotatably connected between each support plate 6 and the threaded sleeve 17. When the threaded rod 16 is rotated by twisting the knob 18, the threaded sleeve 17 can be moved in the vertical direction, so the threaded sleeve 17 can push the support plate 6 to deflect through the connecting rod 19, thereby realizing the adjustment and control of the opening and closing of the support plate 6.

[0041] Preferably, the support leg 602 is fixedly connected to the bottom end of the sheet body 601, and the materials of the support leg 602 and the rib 6021 are rubber, so it can provide shock absorption and increase friction while supporting the device. The skeleton 6022 includes a plurality of spring wires arranged horizontally and vertically in an alternating manner. The spring wires can provide a supporting effect without affecting the deformation of the rubber material. Therefore, the skeleton 6022 can maintain the supporting strength of the support leg 602.

[0042] Working principle: When conducting a car idling NVH test, you can first move the car into a semi-anechoic chamber, then place the device in the car, and twist the knob 18. The knob 18 can drive the threaded rod 16 to rotate to allow the threaded sleeve 17 to move in the vertical direction, and the movement of the threaded sleeve 17 can push the support sheet 6 through the connecting rod 19, so that all the support sheets 6 are stretched out. At this time, the device can be placed on the floor of the car, and the support sheet 6 is used to support the device. In this state, the support foot 602 can increase the friction between the support foot 602 and the car floor through the rib 6021, and at the same time, the support foot 602 can maintain sufficient support strength through the skeleton 6022. Therefore, the support sheet 6 can stably support the device, and the support foot 602 made of rubber material provides a shock-absorbing and buffering effect, thereby ensuring the stability of the device after placement;

[0043] Then, the support rod 4 can be pulled until it drives the connecting block 8 to rise to the top in the sleeve 2, and the limiting pile 7 can enter the vertical groove of the slot 803 on the connecting block 8, and then the fixing ring 3 is twisted to rotate, and the limiting pile 7 is driven to move by the fixing ring 3, so that the limiting pile 7 can enter the horizontal slot of the slot 803. At this time, the protrusion 802 can limit the limiting pile 7, so the limiting pile 7 can maintain the connecting block 8 in a raised state. In this state, the support rod 4 will fully extend to the outside of the sleeve 2, so the support rod 4 made of metal shaped hose can be bent to make the fixing clamp 5 face the headrest of the seat in the car;

[0044] After that, the microphone 15 can be inserted into the ring 11, and then the outer free end of the connecting belt 12 can be pulled. Since the belt body of the connecting belt 12 passes through the connecting ring 13, the two clips can be brought closer to each other by pulling the connecting belt 12. After the two clips clamp the microphone 15, the free end of the connecting belt 12 can be glued to its belt body, so that the fixing clip 5 can stably clamp the microphone 15. In this process, the cushion block 10 can push the microphone 15 at the inner side of the fixing clip 5, so as to ensure that it can be clamped at the center position of the inner side of the fixing clip 5, thereby ensuring the clamping effect provided for the microphone 15.

[0045] After the microphone 15 is installed, the support rod 4 can be further adjusted to ensure that the microphone 15 is accurately facing the headrest. After that, the car can be started and put in an idling state, and the noise can be recorded through the microphone 15. Since the vehicle is in a semi-anechoic chamber, it can avoid the influence of external noise on the experimental process.

[0046] After the experiment is completed, the connecting belt 12 can be pulled to loosen the fixing clamp 5. At this time, the ring 11 will still restrain the microphone 15 through friction, so the microphone 15 will not fall directly. Instead, after the operator pulls the microphone 15 out of the ring 11, the microphone 15 can be stored, and then the fixing ring 3 is twisted in the reverse direction to make the limit pile 7 leave the horizontal groove of the card slot 803, and then the support rod 4 can be retracted into the sleeve 2; after that, the device can be picked up, and then the knob 18 can be twisted in the reverse direction to retract the support plate 6.

[0047] Example 2

[0048] See attached Figure 7The present application provides a vehicle idling NVH test device. Compared with Example 1, in order to protect the fixing clamp 5, the top of the base 1 is fixedly connected with a telescopic tube sleeve 20 on the outside of the sleeve 2, and the top of the telescopic tube sleeve 20 is fixedly connected with a drawstring bag 21. The telescopic tube sleeve 20 and the drawstring bag 21 can be used to store the sleeve 2 and the fixing clamp 5 in a closed manner. In this case, the degree of contamination of the fixing clamp 5 by external dirt and dust can be reduced, thereby preventing the fixing clamp 5 from clamping the microphone 15 and causing it to be contaminated and worn.

[0049] Working principle: After the device is used and the support rod 4 is retracted into the sleeve 2, the telescopic sleeve 20 can be pulled to extend until it completely wraps the sleeve 2 and the fixing clip 5, and then the drawstring of the drawstring bag 21 is pulled to lock its opening. In this case, the fixing clip 5 can be in a closed state, thereby providing a protective effect for it.

[0050] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle idling NVH test device, comprising a base (1) and a microphone (15), wherein the microphone (15) is used to collect noise, and is characterized in that: The top of the base (1) is provided with a fixing mechanism, and the bottom of the base (1) is provided with a supporting mechanism for supporting a microphone (15); The fixing mechanism comprises an adjustment component and a fixing clamp (5), and the fixing mechanism installs a microphone (15) through the fixing clamp (5), the adjustment component comprises a locking module and a plurality of sleeves (2), the top of the sleeve (2) is provided with a telescopic opening, and the sleeve (2) is provided with a support rod (4) at the telescopic opening, the support rod (4) is a metal shaped hose, and the support rod (4) is locked with the sleeve (2) through the locking module, the supporting mechanism comprises an adjustment component and a plurality of supporting plates (6), the adjustment component is used to adjust the opening and closing of the plurality of supporting plates (6), the supporting plate (6) comprises a plate body (601) and a supporting foot (602), the inner side surface of the supporting foot (602) is provided with a plurality of ribs (6021) for anti-slip, and the inside of the supporting foot (602) is provided with a skeleton (6022) for maintaining the supporting strength.

2. The vehicle idling NVH test device according to claim 1, characterized in that: A plurality of the sleeves (2) are fixedly connected to the outer side of the top end of the base (1) at equal distances, and the locking module comprises a connecting block (8), the connecting block (8) is located inside the sleeve (2), and the front and rear sides of the connecting block (8) are provided with sliding grooves (801), and the inner walls on both sides of the sleeve (2) are fixedly connected with guide rails (9), and the two guide rails (9) are slidably connected to the connecting block (8) at the two sliding grooves (801) respectively.

3. The vehicle idle NVH test device according to claim 2, characterized in that: The connecting block (8) is provided with a card slot (803) on both the left and right sides, the two card slots (803) are both "L"-shaped, and the two card slots (803) are in a centrally symmetrical state, the card slot (803) comprises a vertical slot and a transverse slot, and the connecting block (8) is fixedly connected with a protrusion (802) at the top inner wall and the bottom inner wall of the transverse slot, the material of the protrusion (802) is rubber, and the protrusion (802) is hemispherical.

4. The vehicle idle NVH test device according to claim 3, characterized in that: The top outer side of the sleeve (2) is rotatably connected to a fixing ring (3), and the inner walls on both sides of the fixing ring (3) are fixedly connected to limiting piles (7). The tops on both sides of the sleeve (2) are provided with strip openings on the inner side of the fixing ring (3), and the two limiting piles (7) extend into the interior of the sleeve (2) at the two strip openings, respectively, and the two limiting piles (7) are respectively matched with the two slots (803).

5. The vehicle idle NVH test device according to claim 1, characterized in that: The fixing clamp (5) comprises two clips, the top ends of the two clips are respectively fixedly connected to a connecting belt (12) and a connecting ring (13), the connecting ring (13) is a self-adhesive Velcro, the belt body of the connecting ring (13) passes through the connecting belt (12), and one end of the connecting ring (13) is externally fixedly connected to a limiting block (14), and the diameter of the limiting block (14) is greater than the pore width of the connecting ring (13).

6. The vehicle idle NVH test device according to claim 5, characterized in that: The two clips are rotatably connected to both sides of the top end of the support rod (4), and pads (10) are fixedly connected to the inner bottom ends of the two support rods (4). The material of the two pads (10) is rubber, and the two pads (10) are semi-cylindrical. The top end of the support rod (4) is fixedly connected to a ring (11) between the two clips. The material of the ring (11) is rubber.

7. The vehicle idle NVH test device according to claim 1, characterized in that: The adjustment assembly comprises a threaded rod (16), the threaded rod (16) being rotatably connected to the middle of the bottom end of the base (1), the bottom end of the threaded rod (16) being fixedly connected to a knob (18), and the outer thread of the threaded rod (16) being connected to a threaded sleeve (17), a plurality of support plates (6) being rotatably connected to the outer side of the bottom end of the base (1) at equal distances, and a connecting rod (19) being rotatably connected between each support plate (6) and the threaded sleeve (17).

8. The vehicle idle NVH test device according to claim 1, characterized in that: The support legs (602) are fixedly connected to the bottom end of the sheet body (601), and the materials of the support legs (602) and the ribs (6021) are both rubber, and the skeleton (6022) includes a plurality of spring wires arranged in a horizontal and vertical staggered manner.

9. The vehicle idle NVH test device according to claim 7, characterized in that: The top end of the base (1) is fixedly connected to a telescopic sleeve (20) at the outer side of the sleeve (2), and the top end of the telescopic sleeve (20) is fixedly connected to a drawstring bag (21).

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