A new energy vehicle noise test system

Abstract

The present invention specifically relates to a noise test system for new energy vehicles, belonging to the technical field of vehicle noise testing. The noise test system for new energy vehicles includes a collection component, and also includes an installation component and a fixing component. The collection component is connected to the installation component. The fixing component includes a housing, a flexible cover, a support body, and a driving component. The housing is in the shape of a frustum of a pyramid, and an opening is provided on the upper base of the housing. The installation component is detachably connected to the upper base of the housing. The flexible cover is in a pointed shape, and the flexible cover covers the opening. The support body is arranged inside the housing, and the support body is inserted into the flexible cover through the opening. The support body is movably connected to the housing along the height direction of the housing. The driving component is used to drive the support body to move along the height direction of the housing. This device has the advantage of small space occupation. At the same time, it can stably and reliably fix the collection component, thereby improving the accuracy of noise collection.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive noise testing, and particularly relates to a noise testing system for new energy vehicles. Background Art

[0002] With the development of new energy vehicles, related technologies have become more and more mature, which also enables some technologies to be transferred from household passenger vehicles to special vehicles in other fields. Based on this, research on related technologies of electric heavy trucks has been launched in universities and enterprises, and the research mainly includes multi-speed drive systems for electric heavy trucks, intelligent gear selection, shockless shift control, and automotive vibration and noise suppression technologies. Among them, automotive vibration and noise suppression technology is an important part of the research because the vibration and noise of the electric drive system are important factors affecting the driving experience of the vehicle. Especially for the installation of the multi-speed electric drive axle without a suspension system, the road excitation will be directly transmitted to the axle through the wheels, coupling with the vibration of the motor and transmission to form a noise source.

[0003] In automotive vibration and noise suppression technology, testing the noise and obtaining accurate test data are the basis for subsequent optimization of the multi-speed electric drive axle structure and reduction of noise. In order to obtain noise data at the driver's seat, a noise collection device needs to be set at the driver's seat. Since the driver's seat itself is made of soft material, common fixing frames or jigs are not easy to use, the noise collection device is prone to looseness, and it is also not convenient to adjust the position of the noise collection device. In summary, how to install the noise collection device at the driver's seat and improve the accuracy of noise data collection is a technical problem to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a noise testing system for new energy vehicles, through which the accuracy of collecting the noise generated by the electric drive axle structure of new energy vehicles can be improved, facilitating subsequent optimization of the multi-speed electric drive axle structure.

[0005] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is: The embodiment of the present application provides a noise testing system for new energy vehicles, including a collection component, and further including an installation component and a fixing component. The collection component is connected to the installation component. The fixing component includes a housing, a flexible cover, a support body, and a driving component. The housing is in the shape of a frustum of a pyramid, with an opening provided at the upper base of the housing. The installation component is detachably connected to the upper base of the housing. The flexible cover is in a pointed shape and covers the opening. The support body is arranged inside the housing, and the support body is inserted into the flexible cover through the opening. The support body is movably connected to the housing along the height direction of the housing. The driving component is used to drive the support body to move along the height direction of the housing.

[0006] In some embodiments, the driving component includes an elastic strip and a pressing portion. The elastic strip includes a first segment, a second segment, a third segment, and a fourth segment connected in sequence. The first segment and the fourth segment are connected to the housing. The first segment and the second segment, and the third segment and the fourth segment respectively form a first bending section with the inner bending side facing the upper bottom of the housing. The second segment and the third segment form a second bending section with the inner bending side facing the lower bottom of the housing. The second bending section protrudes from the side of the support body away from the lower bottom of the housing. Along the height direction of the housing, the support body is provided with two abutting portions at intervals. The second segment is partially disposed between the two abutting portions. The pressing portion abuts against the sides of the first segment and the fourth segment away from the lower bottom of the housing.

[0007] In some embodiments, the pressing portion includes a cavity and a flexible sealing portion. The cavity is disposed in the housing, and a discharge port is provided on the side of the cavity close to the lower bottom of the housing. The flexible sealing portion seals the discharge port.

[0008] In some embodiments, the housing includes two first side walls disposed opposite to each other. The driving component further includes two wing plates and a middle airbag. The two wing plates are respectively rotatably connected to the sides of the two first side walls close to the lower bottom of the housing. The two wing plates are respectively provided with a plurality of through holes. The middle airbag is disposed between the two wing plates, and the middle airbag communicates with the cavity.

[0009] In some embodiments, the flexible cover includes two second side walls disposed opposite to each other. A space for accommodating the support body is formed between the two second side walls. The two second side walls are respectively provided with an inflation cavity. The cavity is provided with a pressure relief portion, and the exhaust port of the pressure relief portion communicates with the inflation cavity.

[0010] In some embodiments, the mounting assembly includes a spherical cavity. The spherical cavity is provided with an insertion interface. The two second side walls are configured to form a spherical capsule in an inflated state. The spherical capsule is accommodated in the spherical cavity, and the acquisition component is connected to the spherical cavity.

[0011] In some embodiments, a limiting disk is rotatably disposed around the circumference of the insertion interface in the spherical cavity. A plurality of elastic support arms are provided around the circumference of the limiting disk.

[0012] In some embodiments, the limiting disk is provided with an arc-shaped groove with the center located at the axis of the insertion interface. Along the radial direction of the insertion interface, the spherical cavity is provided with a sliding hole. The sliding hole houses a pushing portion. In the arc-shaped groove, the limiting disk is provided with a first limiting portion, and the spherical cavity is provided with a second limiting portion. A first elastic member is disposed between the first limiting portion and the second limiting portion. The first limiting portion is movably provided with an inserting portion, and the inserting portion is inserted into the sliding hole.

[0013] In some embodiments, the mounting assembly further includes a telescopic rod body. The telescopic rod body is connected to the spherical cavity, and the acquisition component is connected to the telescopic rod body.

[0014] In some embodiments, the acquisition component includes a sound pickup microphone.

[0015] The present invention has the following beneficial effects:

[0016] The housing has a frustum-shaped structure, so that when the housing is inserted between the backrest and the seat cushion, there is a tendency to move backward and exit between the backrest and the seat cushion. When the upper bottom side of the housing passes from one side of the driver and passenger seat to the other side, the mounting assembly is connected to the upper bottom of the housing. At this time, the mounting assembly can prevent the housing from exiting between the backrest and the seat cushion, so that the acquisition component can be fixed to the driver and passenger seat through the mounting assembly. This fixing method, on the one hand, has the advantage of small space occupation. On the other hand, it can stably and reliably fix the acquisition component, thereby improving the acquisition accuracy of noise. On the other hand, the acquisition position of the acquisition component can be close to the position where the human ear of the driver and passenger is located, which further improves the acquisition accuracy of noise and enables the results of subsequent research and development to be more directly felt by the driver and passenger. On the other hand, the acquisition component can have multiple fixing positions. For example, when the housing is inserted between the backrest and the seat cushion from the front of the driver and passenger seat, the acquisition component is fixed to the back of the driver and passenger seat at this time. And when the housing is inserted between the backrest and the seat cushion from the back of the driver and passenger seat, the acquisition component can be fixed to the front of the driver and passenger seat at this time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the actual installation schematic diagram of the new energy vehicle noise test system of the present invention;

[0018] Figure 2 is the structural schematic diagram of the fixing component of the present invention;

[0019] Figure 3 is the structural schematic diagram of the wire assembly of the present invention;

[0020] Figure 4 is Figure 3 the enlarged view at B of

[0021] Figure 5 is the side view structural schematic diagram of the flexible cover of the present invention;

[0022] Figure 6 is the structural schematic diagram of the mounting assembly of the present invention;

[0023] Figure 7 is the cooperation schematic diagram of the limit disc and the seat cushion of the present invention;

[0024] Figure 8 is Figure 7 the enlarged view at C of

[0025] Reference numerals: 1 - driving seat, 11 - seat cushion, 12 - backrest, 2 - acquisition component, 3 - mounting assembly, 31 - spherical cavity, 32 - limiting disc, 33 - elastic support arm, 34 - main rod, 35 - rod sleeve, 36 - telescopic rod body, 37 - cylinder body, 38 - limiting bolt, 39 - pushing part, 310 - second limiting part, 311 - first limiting part, 312 - inserting part, 313 - first elastic member, 4 - fixing assembly, 41 - housing, 42 - flexible cover, 43 - wing plate, 44 - through hole, 45 - lower bottom, 46 - upper bottom, 47 - cavity, 48 - flexible sealing part, 49 - elastic strip, 410 - support body, 411 - first side wall, 412 - first segment, 413 - second segment, 414 - third segment, 415 - fourth segment, 416 - abutting part, 417 - inflatable cavity, 418 - second side wall, 419 - middle airbag. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. If not specifically specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] Refer to Figure 1 、 Figure 2 and Figure 3 , an embodiment of the present application provides a new energy vehicle noise test system, including an acquisition component 2, and further including a mounting assembly 3 and a fixing assembly 4. The acquisition component 2 is connected to the mounting assembly 3. The fixing assembly 4 includes a housing 41, a flexible cover 42, a support body 410 and a driving component. The housing 41 is in the shape of a frustum of a pyramid. An opening is provided on the upper bottom 46 of the housing 41. The mounting assembly 3 is detachably connected to the upper bottom 46 of the housing 41. The flexible cover 42 is in a pointed shape, and the flexible cover 42 covers the opening. The support body 410 is arranged inside the housing 41. The support body 410 is inserted into the flexible cover 42 through the opening. The support body 410 is movably connected to the housing 41 along the height direction of the housing 41. The driving component is used to drive the support body 410 to move along the height direction of the housing 41.

[0029] The acquisition component 2 is used to acquire noise data. For example, the acquisition component 2 can be a sound pickup microphone. Using a sound pickup microphone for sound pickup has the advantages of a long sound pickup distance and stable signal on the one hand, improving the acquisition accuracy. On the other hand, the sound pickup microphone has the functions of plug and play and quick automatic pairing, reducing the complexity of setting and operation, being able to quickly enter the working state, and improving the acquisition efficiency.

[0030] The housing 41 is used to connect the fixing component 4 to the driver's seat of the vehicle. The driver and passenger seat 1 usually includes a backrest 12 and a seat cushion 11. The backrest 12 is rotatably connected to the seat cushion 11, and there is a gap between the bottom of the backrest 12 and the top of the seat cushion 11. The structure of the housing 41 is in the shape of a frustum of a pyramid, so that the housing 41 can form a structure with one end large and one end small. The small end of the housing 41 is inserted between the backrest 12 and the seat cushion 11, so that the fixing component 4 can be connected to the driver and passenger seat 1.

[0031] The housing 41 in the embodiment of the present application can be a quadrangular frustum structure.

[0032] Since the housing 41 is in the shape of a frustum of a pyramid, the upper base 46 and the lower base 45 of the housing 41 are two parallel wall surfaces of the frustum of a pyramid. The one with a smaller area is the upper base 46, and the one with a larger area is the lower base 45. The height direction of the housing 41 refers to the direction perpendicular to the upper base 46 of the housing 41.

[0033] The support body 410 and the flexible cover 42 cooperate to guide the housing 41 when the housing 41 is inserted between the backrest 12 and the seat cushion 11. When the support body 410 is inserted into the flexible cover 42 through the opening, the flexible cover 42 is difficult to deform, and at this time it is convenient to insert the housing 41 between the seat cushion 11 and the backrest 12.

[0034] The support body 410 is movably connected to the housing 41 along the height direction of the housing 41, so that the support body 410 can have two states. One is that the support body 410 moves out of the housing 41 from the opening and enters the flexible cover 42. The other is that under the action of the driving component, the support body 410 moves out of the flexible cover 42 and retracts into the housing 41 from the opening.

[0035] The user holds the housing 41 and aligns the tip of the flexible cover 42 between the backrest 12 and the seat cushion 11, and then applies force to the housing 41 so that the housing 41 can be inserted between the backrest 12 and the seat cushion 11. When the housing 41 is inserted between the backrest 12 and the seat cushion 11, the tip of the flexible cover 42 may be in a state of being inserted into the backrest 12 or the seat cushion 11. If the position of the support body 410 relative to the housing 41 is fixed, making the flexible cover 42 always unable to deform, then when the user pushes the housing 41, the support body 410 may pierce the flexible cover 42, and then pierce the backrest 12 or the seat cushion 11.

[0036] In the embodiment of the present application, after the flexible cover 42 is inserted between the backrest 12 and the seat cushion 11, the driving member drives the support body 410 to move, so that the support body 410 can withdraw from the flexible cover 42 and retract into the housing 41 from the opening. At this time, the flexible cover 42 cannot pierce the backrest 12 or the seat cushion 11, and as the housing 41 moves, it can be pushed from one side of the driving seat 1 to the other side by the housing 41. After the flexible cover 42 is pushed to the other side, its flexible structure facilitates the user to pull the housing 41 to move from the other side of the driving seat 1.

[0037] Since the housing 41 has a frustum-shaped structure, when the housing 41 is inserted between the backrest 12 and the seat cushion 11, there is a tendency to move in the reverse direction and withdraw from between the backrest 12 and the seat cushion 11. After the upper base 46 side of the housing 41 passes from one side of the driving seat 1 to the other side, the mounting assembly 3 is connected to the upper base 46 of the housing 41. At this time, the mounting assembly 3 can prevent the housing 41 from withdrawing from between the backrest 12 and the seat cushion 11, and finally enables the acquisition component 2 to be fixed to the driving seat 1 through the mounting assembly 3. This fixing method, on the one hand, has the advantage of small space occupation. On the other hand, it can stably and reliably fix the acquisition component 2, thereby improving the acquisition accuracy of noise. On the other hand, the acquisition position of the acquisition component 2 can be close to the position where the ears of the driver and passengers are located, which further improves the acquisition accuracy of noise and enables the results of subsequent research and development to be more directly felt by the driver and passengers. On the other hand, the acquisition component 2 can have multiple fixing positions. For example, when the housing 41 is inserted between the backrest 12 and the seat cushion 11 from the front of the driving seat 1, the acquisition component 2 is fixed to the back of the driving seat 1. When the housing 41 is inserted between the backrest 12 and the seat cushion 11 from the back of the driving seat 1, the acquisition component 2 can be fixed to the front of the driving seat 1.

[0038] See Figure 3 and Figure 4 In some embodiments, the driving member includes an elastic strip 49 and a pressing portion. The elastic strip 49 includes a first segment 412, a second segment 413, a third segment 414, and a fourth segment 415 connected in sequence. The first segment 412 and the fourth segment 415 are connected to the housing 41. The first segment 412 and the second segment 413, and the third segment 414 and the fourth segment 415 respectively form a first bending section with the inner bending side facing the upper base 46 of the housing 41. The second segment 413 and the third segment 414 form a second bending section with the inner bending side facing the lower base 45 of the housing 41. The second bending section protrudes from the side of the support body 410 away from the lower base 45 of the housing 41. Along the height direction of the housing 41, two abutting portions 416 are provided on the support body 410 at intervals. The second segment 413 is partially disposed between the two abutting portions 416. The pressing portion abuts against the sides of the first segment 412 and the fourth segment 415 away from the lower base 45 of the housing 41.

[0039] The first segment 412, the second segment 413, the third segment 414, and the fourth segment 415 respectively form a first bending segment with the inner bending side facing the upper bottom 46 of the housing 41. The first bending segment enables the elastic strip 49 to apply a force on the support body 410 towards the flexible cover 42, so that the support body 410 can enter the flexible cover 42 from the opening of the housing 41.

[0040] The elastic strip 49 has the advantage of being able to be arranged in a narrow space.

[0041] Two abutting portions 416 are arranged at intervals on the support body 410. The second segment 413 is partially arranged between the two abutting portions 416. When the pressing portion applies a force to the first segment 412 and the fourth segment 415 from the side away from the lower bottom 45 of the housing 41, the second segment 413 can drive the support body 410 to move into the housing 41. Similarly, the fourth part can also be partially arranged between the two abutting portions 416.

[0042] The second bending segment formed by the second segment 413 and the third segment 414 protrudes from the support body 410. The second bending segment can support the tip of the flexible cover 42, which is more conducive to inserting the flexible cover 42 between the backrest 12 and the seat cushion 11.

[0043] By applying a force to the side of the first segment 412 and the fourth segment 415 away from the lower bottom 45 of the housing 41 through the pressing portion, the elastic strip 49 can drive the support body 410 to retract into the housing 41.

[0044] See Figure 3 and Figure 4 , in some embodiments, the pressing portion includes a cavity 47 and a flexible sealing portion 48. The cavity 47 is arranged in the housing 41. An exhaust port is arranged on the side of the cavity 47 close to the lower bottom 45 of the housing 41. The flexible sealing portion 48 closes the exhaust port.

[0045] The pressing portion can be provided in two corresponding to the first segment 412 and the fourth segment 415. The flexible sealing portion 48 is used to abut against the first segment 412 or the fourth segment 415.

[0046] The cavity 47 cannot be deformed when gas is charged, so that the gas entering the cavity 47 will be discharged from the exhaust port. The flexible sealing portion 48 seals the exhaust port. When gas is charged into the cavity 47, the flexible sealing portion 48 expands, and thus the flexible sealing portion 48 can push the first segment 412 or the fourth segment 415 to move.

[0047] See Figure 1 and Figure 2, in some embodiments, the housing 41 includes two first side walls 411 disposed opposite to each other, and the driving member further includes two wing plates 43 and a middle airbag 419. The two wing plates 43 are respectively rotatably connected to one side of the two first side walls 411 close to the lower bottom 45 of the housing 41, and a plurality of through holes 44 are respectively provided on the two wing plates 43. The middle airbag 419 is disposed between the two wing plates 43, and the middle airbag 419 communicates with the cavity 47.

[0048] Under the action of the middle airbag 419, the two wing plates 43 can be in an open state in the initial state.

[0049] When the housing 41 is gradually inserted between the backrest 12 and the seat cushion 11, the two wing plates 43 are also gradually squeezed and closed, so that the two wing plates 43 can squeeze the middle airbag 419, and the gas in the middle airbag 419 is squeezed into the cavity 47, so that the flexible sealing portion 48 can expand.

[0050] At the same time, since the wing plates 43 are provided with through holes 44, when the wing plates 43 squeeze the middle airbag 419, the middle airbag 419 can partially protrude from the through holes 44. In this way, when the wing plates 43 are between the backrest 12 and the seat cushion 11, the friction between the wing plates 43 and the driver and passenger seat 1 can be increased, so that the middle airbag 419 can play a role in preventing detachment.

[0051] The middle airbag 419 can be provided with a switching valve for controlling the charging and discharging of gas in the middle airbag 419.

[0052] See Figure 5 , in some embodiments, the flexible cover 42 includes two second side walls 418 disposed opposite to each other. A space for accommodating the support body 410 is formed between the two second side walls 418. Inflation chambers 417 are respectively provided on the two second side walls 418. The cavity 47 is provided with a pressure relief portion, and the exhaust port of the pressure relief portion communicates with the inflation chamber 417.

[0053] The pressure relief portion can be selected from existing products. For example, the pressure relief portion can be a pressure relief valve.

[0054] The pressure relief portion is used to discharge the gas into the inflation chamber 417 of the second side wall 418 when the air pressure in the cavity 47 increases to a threshold value.

[0055] Since the wing plates 43 are gradually closed when the housing 41 is inserted between the backrest 12 and the seat cushion 11, the air pressure in the cavity 47 gradually increases. By reasonably setting the pressure relief threshold of the pressure relief portion, when the flexible cover 42 is about to pass through from one side of the driver and passenger seat 1 to the other side (that is, the gap between the backrest 12 and the seat cushion 11 gradually increases), the pressure relief portion can be opened and the gas enters the inflation chamber 417.

[0056] When the inflation chamber 417 between the two second side walls 418 is inflated, on the one hand, the opposite sides of the two side walls are closed, so that the support body 410 and the elastic strip 49 cannot enter the flexible cover 42, reducing the risk of the support body 410 piercing the backrest 12 or the seat cushion 11. On the other hand, as the inflation chamber 417 gradually expands, the flexible cover 42 can assist the housing 41 to be inserted between the backrest 12 and the seat cushion 11. On the further hand, after the inflation chamber 417 is fully inflated, the flexible cover 42 can prevent the housing 41 from withdrawing from between the backrest 12 and the seat cushion 11, so that the flexible cover 42 can play a fixing role on the housing 41.

[0057] In the embodiment where the elastic strip 49 is provided with a first bending section and a second bending section, since the elastic strip 49 is formed with a first bending section and a second bending section, such a structure enables the first segment 412 and the second segment 413, and the third segment 414 and the fourth segment 415 to respectively form a structure similar to a V shape. Under the action of the pressing part, the first segment 412 and the fourth segment 415 will move in a direction away from each other, so that the second segment 413 and the third segment 414 will also separate from each other, and further enabling the pointed structure formed by the second segment 413 and the third segment 414 to become blunt, reducing the risk of the second bending section piercing the inflation chamber 417.

[0058] In the embodiment of the present application, a switching valve may also be provided on the channel connecting the pressure relief part and the inflation chamber 417 for controlling the inflation and deflation of the inflation chamber 417.

[0059] See Figure 6 , in some embodiments, the mounting assembly 3 includes a spherical cavity 31. The spherical cavity 31 is provided with an insertion port. The two second side walls 418 are configured to form a spherical capsule in an inflated state. The spherical capsule is received in the spherical cavity 31, and the acquisition component 2 is connected to the spherical cavity 31.

[0060] After the gas is filled into the inflation chamber 417 of the second side wall 418, the second side wall 418 expands. Under the limiting action of the inner wall of the spherical cavity 31, the flexible cover 42 expands to form a structure similar to a sphere, and further enabling the flexible cover 42 to cooperate with the spherical cavity 31 to form a structure similar to a ball head, so that the mounting assembly 3 can be detachably connected to the housing 41. At the same time, the spherical cavity 31 can rotate relative to the flexible cover 42, facilitating the adjustment of the position of the acquisition component 2.

[0061] The spherical-like structure formed by the flexible cover 42 has the advantage of being lightweight on the one hand. On the other hand, when the flexible cover 42 is inflated and expanded, before it is completely filled, the flexible cover 42 can produce a large deformation, so that even if the insertion port of the spherical cavity 31 is set to be small, the flexible cover 42 can enter the spherical cavity 31. After the flexible cover 42 enters the spherical cavity 31 from the insertion port, the flexible cover 42 is completely inflated. Since the insertion port of the spherical cavity 31 is set to be small, the matching effect between the spherical cavity 31 and the flexible cover 42 is increased, and the risk of the spherical cavity 31 detaching from the flexible cover 42 is reduced.

[0062] See Figure 6 and Figure 7 , in some embodiments, a limiting disk 32 is rotatably arranged around the circumference of the insertion port of the spherical cavity 31, and a plurality of elastic support arms 33 are arranged around the circumference of the limiting disk 32.

[0063] The specific structure of the rotational connection between the limiting disk 32 and the spherical cavity 31 can be selected from existing structures and will not be elaborated here.

[0064] The rotation axis of the limiting disk 32 can be parallel to the rotation axis of the insertion port.

[0065] Taking the case where the housing 41 passes from the back side of the driver's seat 1 to the front side as an example, when the flexible cover 42 passes through the driver's seat 1, connects the spherical cavity 31 to the flexible cover 42 and adjusts the position, there is a certain distance between the spherical cavity 31 and the seat cushion 11. At this time, the elastic support arm 33 can contact the seat cushion 11. Rotate the limiting disk 32. When the limiting disk 32 rotates, the elastic support arm 33 deforms under the action of the seat cushion 11, so that the limiting disk 32 can support the spherical cavity 31 and improve the stability of the spherical cavity 31.

[0066] The advantage of adjusting the elastic restoring force of the elastic support arm 33 by rotating the limiting disk 32 is that, on the one hand, it is convenient to adjust the state of the elastic support arm 33 so that the limiting disk 32 can be in the state with the best supporting effect on the spherical cavity 31. Specifically, Figure 7Taking the shown example, when rotating the rotation limiting disc 32, the distance between point A on the limiting disc 32 and the seat cushion 11 changes from large to small and then from small to large. When the distance changes from large to small, the elastic restoring force generated by the elastic support arm 33 gradually increases. When the distance changes from small to large, the elastic restoring force generated by the elastic support arm 33 gradually decreases. Assuming that when point A is directly opposite to the seat cushion 11, at this time, the supporting effect of the limiting disc 32 on the spherical cavity 31 is the best. And when connecting the spherical cavity 31 to the flexible cover 42 and adjusting the angle of the spherical cavity 31 relative to the flexible cover 42, point A may not be in the state of being directly opposite to the seat cushion 11. At this time, by rotating the limiting disc 32, point A can be rotated to be directly opposite to the seat cushion 11. On the other hand, within a certain range, after adjusting the position of the spherical cavity 31 relative to the flexible cover 42, even if the limiting disc 32 has a certain inclination angle relative to the seat cushion 11, such that the elastic support arm 33 cannot contact the seat cushion 11 directly, under the action of the frictional force between the elastic support arm 33 and the seat cushion 11, when rotating the limiting disc 32, the elastic support arm 33 can still be bent. At this time, although the elastic restoring force generated by a single elastic support arm 33 decreases, the elastic restoring force generated by multiple elastic support arms 33 together can still provide a good supporting effect on the spherical cavity 31. On another hand, by rotating the limiting disc 32 to adjust the bending degree of the elastic support arm 33, the risk of damage to the elastic support arm 33 can be reduced. Further, after the position of the limiting disc 32 is rotated in place, the contact points between some elastic support arms 33 and the seat cushion 11 can be adjusted manually, so that the direction of the resultant force of the elastic restoring forces generated by multiple bent elastic support arms 33 can be adjusted, enabling the limiting disc 32 to provide a better supporting effect.

[0067] See Figure 8 , in some embodiments, the limiting disc 32 is provided with an arc-shaped groove with the center of the circle located at the axis of the insertion port. Along the radial direction of the insertion port, the spherical cavity 31 is provided with a sliding hole, and the sliding hole houses a pushing portion 39. Inside the arc-shaped groove, the limiting disc 32 is provided with a first limiting portion 311, and the spherical cavity 31 is provided with a second limiting portion 310. A first elastic member 313 is arranged between the first limiting portion 311 and the second limiting portion 310. The first limiting portion 311 is movably provided with an inserting portion 312, and the inserting portion 312 is inserted into the sliding hole.

[0068] The sliding hole is communicated with the inside of the spherical cavity 31, so that when the flexible cover 42 expands, the flexible cover 42 can push the pushing portion 39 to move.

[0069] A spring can be arranged between the pushing portion 39 and the spherical cavity 31, so that the pushing portion 39 can partially insert into the spherical cavity 31 when the flexible cover 42 is not expanded.

[0070] The arc-shaped groove is used to limit the rotation range of the limiting disc 32 relative to the spherical cavity 31.

[0071] A limiting structure can be provided between the pushing part 39 and the sliding hole to prevent the pushing part 39 from disengaging from the sliding hole, and the specific structure of the limiting structure can be selected from existing structures.

[0072] The first elastic member 313 is connected to the second elastic part and abuts against the first limiting part 311, so that the first elastic member 313 does not hinder the subsequent rotation of the limiting disc 32.

[0073] The inserting part 312 is used to limit the position of the limiting disc 32 relative to the spherical cavity 31. When the inserting part 312 is inserted into the sliding hole, the first elastic member 313 can be in a compressed state at this time, and the limiting disc 32 cannot rotate relative to the spherical cavity 31. When the flexible cover 42 expands, the flexible cover 42 pushes the pushing part 39 to move, and then the pushing part 39 pushes the inserting part 312 out of the sliding hole. At this time, due to the large friction force between the flexible cover 42 and the spherical cavity 31, the position of the spherical cavity 31 is fixed, and the first elastic member 313 pushes the limiting disc 32 to rotate. The advantage of this setting is that, on the one hand, the inflation state of the flexible cover 42 can be judged, that is, when the limiting disc 32 rotates, the flexible cover 42 has been inflated in place, and further inflation may cause the flexible cover 42 to over-expand and be damaged. On the other hand, it can make the multiple elastic support arms 33 arranged in the same direction. For example, as shown in the figure, when the limiting disc 32 rotates, the elastic support arms 33 that can contact the seat cushion 11 are all bent in the same side, which is convenient for manually rotating the limiting disc 32 subsequently.

[0074] The first elastic member 313 can be a spring.

[0075] A spring can also be provided between the inserting part 312 and the first limiting part 311 to provide an elastic force for inserting the inserting part 312 into the sliding hole.

[0076] See Figure 6 , in some embodiments, the mounting assembly 3 further includes a telescopic rod body 36, the telescopic rod body 36 is connected to the spherical cavity 31, and the acquisition component 2 is connected to the telescopic rod body 36.

[0077] The telescopic rod body 36 can include a main rod 34 and a rod sleeve 35. The main rod 34 or the rod sleeve 35 is connected to the spherical cavity 31, and the rod sleeve 35 is sleeved on the main rod 34, so that the main rod 34 can move relative to the rod sleeve 35.

[0078] The acquisition component 2 is connected to the telescopic rod body 36, so that the position of the acquisition component 2 relative to the spherical cavity 31 can be adjusted.

[0079] See Figure 6 , in some embodiments, the mounting assembly 3 further includes a connecting component. The connecting component includes a cylinder body 37. The acquisition component 2 is inserted into the cylinder body 37, and the cylinder body 37 is threadedly connected with a limiting bolt 38, and the limiting bolt 38 abuts against the acquisition component 2.

[0080] The limit bolt 38 is used to lock or unlock the cylinder body 37, that is, by rotating the limit bolt 38, the limit bolt 38 can apply a force to the collecting component 2, so that the collecting component 2 abuts against the inner wall of the cylinder body 37. At this time, the collecting component 2 is locked in the cylinder body 37. On the contrary, by rotating the limit bolt 38, the limit bolt 38 no longer contacts the collecting component 2. At this time, the collecting component 2 is unlocked and can be taken out of the cylinder body 37. It should be noted that the collecting end of the collecting component 2 needs to be arranged outside the cylinder body 37.

[0081] The above embodiments only describe the preferred mode of the present invention, rather than limiting the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, variations, modifications, and substitutions made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A new energy vehicle noise test system, comprising an acquisition component (2), characterized in that, It further includes an installation component (3) and a fixing component (4). The acquisition component (2) is connected to the installation component (3). The fixing component (4) includes: A housing (41) in the shape of a frustum of a pyramid. An opening is provided on the upper base (46) of the housing (41). The installation component (3) is detachably connected to the upper base (46) of the housing (41); A flexible cover (42) in a pointed shape. The flexible cover (42) covers the opening; A support body (410) is arranged inside the housing (41). The support body (410) is inserted into the flexible cover (42) through the opening. The support body (410) is movably connected to the housing (41) along the height direction of the housing (41); A driving component is used to drive the support body (410) to move along the height direction of the housing (41). The driving component includes an elastic strip (49) and a pressing part. The elastic strip (49) includes a first segment (412), a second segment (413), a third segment (414), and a fourth segment (415) connected in sequence. The first segment (412) and the fourth segment (415) are connected to the housing (41). The first segment (412) and the second segment (413), and the third segment (414) and the fourth segment (415) respectively form a first bending segment with the inner bending side facing the upper base (46) of the housing (41). The second segment (413) and the third segment (414) form a second bending segment with the inner bending side facing the lower base (45) of the housing (41). The second bending segment protrudes from the side of the support body (410) away from the lower base (45) of the housing (41). Along the height direction of the housing (41), two abutting parts (416) are arranged on the support body (410) at intervals. The second segment (413) is partially arranged between the two abutting parts (416); the pressing part abuts against the sides of the first segment (412) and the fourth segment (415) away from the lower base (45) of the housing (41). The pressing part includes a cavity (47) and a flexible sealing part (48). The cavity (47) is arranged in the housing (41). A discharge port is provided on the side of the cavity (47) close to the lower base (45) of the housing (41). The flexible sealing part (48) closes the discharge port. The flexible cover (42) includes two second side walls (418) arranged opposite to each other. A space for accommodating the support body (410) is formed between the two second side walls (418). Inflatable cavities (417) are respectively arranged on the two second side walls (418). A pressure relief part is arranged in the cavity (47). The exhaust port of the pressure relief part is communicated with the inflatable cavity (417).

2. The new energy vehicle noise test system according to claim 1, wherein, The housing (41) includes two first side walls (411) arranged opposite to each other. The driving component further includes: Two wing plates (43) are respectively rotatably connected to one side of the two first side walls (411) close to the lower bottom (45) of the housing (41), and a plurality of through holes (44) are respectively provided on the two wing plates (43); A middle airbag (419) is arranged between the two wing plates (43), and the middle airbag (419) is communicated with the cavity (47).

3. The new energy vehicle noise test system according to claim 1, characterized in that, The mounting assembly (3) includes a spherical cavity (31), the spherical cavity (31) is provided with an insertion interface, the two second side walls (418) are configured to form a spherical bladder in an inflated state, the spherical bladder is received in the spherical cavity (31), and the acquisition component (2) is connected to the spherical cavity (31).

4. The new energy vehicle noise test system according to claim 3, characterized in that, A limiting disc (32) is rotatably arranged around the circumference of the insertion interface in the spherical cavity (31), and a plurality of elastic support arms (33) are arranged around the circumference of the limiting disc (32).

5. The new energy vehicle noise test system according to claim 4, characterized in that, The limiting disc (32) is provided with an arc-shaped groove with the center located at the axis of the insertion interface. Along the radial direction of the insertion interface, the spherical cavity (31) is provided with a sliding hole, and the sliding hole houses a pushing part (39). In the arc-shaped groove, the limiting disc (32) is provided with a first limiting part (311), the spherical cavity (31) is provided with a second limiting part (310), a first elastic member (313) is arranged between the first limiting part (311) and the second limiting part (310), and an insertion part (312) is movably arranged on the first limiting part (311), and the insertion part (312) is inserted into the sliding hole.

6. The new energy vehicle noise test system according to claim 3, characterized in that, The mounting assembly (3) further includes a telescopic rod body (36), the telescopic rod body (36) is connected to the spherical cavity (31), and the acquisition component (2) is connected to the telescopic rod body (36).

7. The new energy vehicle noise test system according to any one of claims 1-6, characterized in that, The acquisition component (2) includes a sound pickup microphone.

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