New energy automobile noise test system

Abstract

The invention particularly relates to a new energy automobile noise testing system, and belongs to the technical field of automobile noise testing. The new energy automobile noise test system comprises an acquisition part and further comprises an installation assembly and a fixing assembly, the acquisition part is connected to the installation assembly, and the fixing assembly comprises a shell, a flexible cover, a supporting body and a driving part. The shell is in a prismatic table shape, an opening is formed in the upper bottom of the shell, and the installation assembly is detachably connected to the upper bottom of the shell. The flexible cover is in a sharp shape and covers the opening. The supporting body is arranged in the shell, the supporting body is inserted into the flexible cover through the opening, and the supporting body is movably connected to the shell in the height direction of the shell. The driving part is used for driving the supporting body to move in the height direction of the shell. The device has the advantage of being small in occupied space, meanwhile, the collecting component can be stably and reliably fixed, and then the noise collecting accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile noise testing, and in particular relates to a new energy automobile noise testing system. Background Art

[0002] With the development of new energy vehicles, related technologies have become more mature, which also allows some technologies to be transferred from household passenger cars to special vehicles in other fields. Based on this, colleges and enterprises have started research on electric heavy-duty truck related technologies, which mainly include electric heavy-duty truck multi-speed drive system, intelligent gear selection, impact-free shift control and automobile vibration and noise suppression technology. Among them, automobile vibration and noise suppression technology is an important part of the research, because the vibration and noise of the electric drive system is an important factor affecting the driving experience of the vehicle, especially the installation of the multi-speed electric drive bridge without a suspension system, so that the road excitation will be directly transmitted to the bridge through the wheels, and the vibration of the motor and the transmission will produce coupled vibration, forming a noise source.

[0003] In automobile vibration noise suppression technology, testing noise and obtaining accurate test data is the basis for subsequent optimization of multi-speed electric drive axle structure and noise reduction. In order to obtain noise data at the driver's seat, it is necessary to set up a noise collection device at the driver's seat. Since the driver's seat itself is made of soft material, common fixing frames or clamps are not convenient to use, the noise collection device is easy to loosen, and it is 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 that needs to be solved. Summary of the invention

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

[0005] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: the embodiment of the present application provides a new energy vehicle noise testing system, including a collection component, a mounting assembly and a fixing assembly, the collection component is connected to the mounting assembly, and the fixing assembly includes a shell, a flexible cover, a support body and a driving component. The shell is in a prism shape, and an opening is provided on the upper bottom of the shell, and the mounting assembly is detachably connected to the upper bottom of the shell. The flexible cover is pointed, and the flexible cover cover is provided in the opening. The support body is provided in the shell, and the support body is inserted into the flexible cover via the opening, and the support body is movably connected to the shell along the height direction of the shell. The driving component is used to drive the support body to move along the height direction of the shell.

[0006] In some embodiments, the driving component includes an elastic strip and a pressure-applying 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 shell, the first segment and the second segment, the third segment, and the fourth segment respectively form a first curved segment with an inner curved side facing the upper bottom of the shell, the second segment and the third segment form a second curved segment with an inner curved side facing the lower bottom of the shell, the second curved segment protrudes from a side of the support body away from the lower bottom of the shell, along the height direction of the shell, the support body is provided with two abutting portions at intervals, and the second segment is partially provided between the two abutting portions. The pressure-applying portion abuts against a side of the first segment and the fourth segment away from the lower bottom of the shell.

[0007] In some embodiments, the pressure applying part includes a cavity and a flexible sealing part. The cavity is arranged in the shell, and a discharge port is arranged on one side of the cavity close to the bottom of the shell. The flexible sealing part closes the discharge port.

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

[0009] In some embodiments, the flexible cover includes two second side walls arranged 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 part, and the exhaust port of the pressure relief part is connected to 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 collection component is connected to the spherical cavity.

[0011] In some embodiments, a limit plate is rotatably arranged on the spherical cavity around the circumference of the plug interface, and a plurality of elastic support arms are arranged on the limit plate around the circumference of the limit plate.

[0012] In some embodiments, the limiting plate is provided with an arc-shaped groove whose center is located at the axis center of the plug-in interface. Along the radial direction of the plug-in interface, the spherical cavity is provided with a sliding hole, and the sliding hole accommodates a pushing portion. In the arc-shaped groove, the limiting plate is provided with a first limiting portion, and the spherical cavity is provided with a second limiting portion. A first elastic member is provided 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 in the sliding hole.

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

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

[0015] The present invention has the following beneficial effects: The shell has a prism-shaped structure, so that when the shell is inserted between the backrest and the cushion, it has a tendency to move in the opposite direction and exit between the backrest and the cushion. When the upper bottom side of the shell passes from one side of the driver's seat to the other side, the mounting assembly is connected to the upper bottom of the shell. At this time, the mounting assembly can prevent the shell from exiting between the backrest and the cushion, so that the collection component can be fixed to the driver's seat through the mounting assembly. This fixing method, on the one hand, has the advantage of small space occupation. On the other hand, the collection component can be stably and reliably fixed, thereby improving the accuracy of noise collection. On the other hand, the collection position of the collection component can be close to the position of the human ear of the driver and passenger, which further improves the accuracy of noise collection and enables the results of subsequent research and development to be more directly felt by the driver and passenger. On the other hand, the collection component can have multiple fixed positions, for example, the shell is inserted between the backrest and the cushion from the front of the driver's seat, and the collection component is fixed to the back of the driver's seat. And the shell is inserted between the backrest and the cushion from the back of the driver's seat, and the collection component can be fixed to the front of the driver's seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the actual installation of the new energy vehicle noise testing system of the present invention; Figure 2 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 3 is a schematic structural diagram of a conductor assembly of the present invention; Figure 4 for Figure 3 The enlarged view of point B; Figure 5 It is a side view structural schematic diagram of the flexible cover of the present invention; Figure 6 It is a structural schematic diagram of the installation assembly of the present invention; Figure 7 It is a schematic diagram of the coordination between the limiting plate and the seat cushion of the present invention; Figure 8 for Figure 7 Enlarged view of point C.

[0017] Figure numbers: 1-driving seat, 11-seat cushion, 12-backrest, 2-collection component, 3-installation assembly, 31-spherical cavity, 32-limiting plate, 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-insertion part, 313-first elastic member, 4-fixing assembly , 41-shell, 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-abutment part, 417-inflatable cavity, 418-second side wall, 419-hollow bag. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply 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 understood as a limitation on the present invention.

[0020] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a new energy vehicle noise test system, including a collection component 2, a mounting assembly 3 and a fixing assembly 4, wherein the collection component 2 is connected to the mounting assembly 3, and the fixing assembly 4 includes a shell 41, a flexible cover 42, a support body 410 and a driving component. The shell 41 is in a prism shape, and an opening is provided on the upper bottom 46 of the shell 41, and the mounting assembly 3 is detachably connected to the upper bottom 46 of the shell 41. The flexible cover 42 is pointed, and the flexible cover 42 covers the opening. The support body 410 is arranged in the shell 41, and the support body 410 is inserted into the flexible cover 42 via the opening, and the support body 410 is movably connected to the shell 41 along the height direction of the shell 41. The driving component is used to drive the support body 410 to move along the height direction of the shell 41.

[0021] The collection component 2 is used to collect noise data. For example, the collection component 2 can be a radio microphone. Using a radio microphone for sound collection has the advantages of long sound collection distance and stable signal, which improves the accuracy of collection. On the other hand, the radio microphone has plug-and-play and fast automatic pairing functions, which reduces the complexity of settings and operations, can quickly enter the working state, and improves the collection efficiency.

[0022] The housing 41 is used to connect the fixing assembly 4 to the driving seat of the car. The driving seat 1 generally includes a backrest 12 and a cushion 11, and the backrest 12 is rotatably connected to the cushion 11, and there is a gap between the bottom of the backrest 12 and the top of the cushion 11. The structure of the housing 41 is a prism, so that the housing 41 can form a structure with one end larger than the other end, and the small end of the housing 41 is inserted between the backrest 12 and the cushion 11, so that the fixing assembly 4 can be connected to the driving seat 1.

[0023] The housing 41 of the embodiment of the present application may be a quadrangular pyramid structure.

[0024] Since the housing 41 is in a prism shape, the upper base 46 and the lower base 45 of the housing 41 are two parallel walls of the prism, the upper base 46 having a smaller area and the lower base 45 having a larger area. The height direction of the housing 41 refers to the direction in which the housing 41 is perpendicular to the upper base 46.

[0025] The support body 410 cooperates with the flexible cover 42 to guide the shell 41 when the shell 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 it is convenient to insert the shell 41 between the seat cushion 11 and the backrest 12.

[0026] 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.

[0027] 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 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 so that the flexible cover 42 cannot be deformed, 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.

[0028] 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 component drives the support body 410 to move, so that the support body 410 can withdraw from the flexible cover 42 and retract from the opening into the shell 41. At this time, the flexible cover 42 cannot pierce the backrest 12 or the seat cushion 11, and as the shell 41 moves, it can be pushed from one side of the driver's seat 1 to the other side. When the flexible cover 42 is pushed to the other side, its flexible structure makes it easier for the user to pull the shell 41 from the other side of the driver's seat 1 to move.

[0029] Since the shell 41 is a prism-shaped structure, when the shell 41 is inserted between the backrest 12 and the seat cushion 11, it has a tendency to move in the opposite direction and exit between the backrest 12 and the seat cushion 11. When the upper bottom 46 side of the shell 41 passes from one side of the driver's seat 1 to the other side, the mounting assembly 3 is connected to the upper bottom 46 of the shell 41. At this time, the mounting assembly 3 can prevent the shell 41 from exiting between the backrest 12 and the seat cushion 11, and finally the collection component 2 can be fixed to the driver's 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 collection component 2, thereby improving the accuracy of noise collection. On the other hand, the collection position of the collection component 2 can be close to the position of the human ear of the driver and passenger, which further improves the accuracy of noise collection and enables the results of subsequent research and development to be more directly felt by the driver and passenger. On the other hand, the collecting component 2 can have multiple fixed positions. For example, when the housing 41 is inserted from the front of the driving seat 1 between the backrest 12 and the seat cushion 11, the collecting component 2 is fixed to the back of the driving seat 1. When the housing 41 is inserted from the back of the driving seat 1 between the backrest 12 and the seat cushion 11, the collecting component 2 can be fixed to the front of the driving seat 1.

[0030] See also Figure 3 and Figure 4 In some embodiments, the driving component includes an elastic strip 49 and a pressure-applying 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, the second segment 413, the third segment 414, and the fourth segment 415 respectively form a first curved segment with an inner curved side facing the upper bottom 46 of the housing 41. The second segment 413 and the third segment 414 form a second curved segment with an inner curved side facing the lower bottom 45 of the housing 41. The second curved segment protrudes from a side of the support body 410 away from the lower bottom 45 of the housing 41. Along the height direction of the housing 41, the support body 410 is provided with two abutting portions 416 at intervals, and the second segment 413 is partially provided between the two abutting portions 416. The pressure-applying portion abuts against a side of the first segment 412 and the fourth segment 415 away from the lower bottom 45 of the housing 41.

[0031] The first segment 412 and the second segment 413, the third segment 414 and the fourth segment 415 respectively form a first bending section with the inner bending side facing the upper bottom 46 of the shell 41. The first bending section enables the elastic strip 49 to apply a force toward the flexible cover 42 to the support body 410, so that the support body 410 can enter the flexible cover 42 from the opening of the shell 41.

[0032] The elastic strip 49 has an advantage in that it can be arranged in a narrow space.

[0033] The support body 410 is provided with two abutting portions 416 at intervals, and the second segment 413 is partially provided between the two abutting portions 416, so that when the pressure applying portion applies force to the first segment 412 and the fourth segment 415 from the side away from the lower bottom 45 of the shell 41, the second segment 413 can drive the support body 410 to move into the shell 41. Similarly, the fourth portion can also be partially provided between the two abutting portions 416.

[0034] The second curved section formed by the second section 413 and the third section 414 protrudes from the support body 410 . The second curved section can support the tip of the flexible cover 42 , making it easier to insert the flexible cover 42 between the backrest 12 and the seat cushion 11 .

[0035] The pressure-applying portion applies force to the first segment 412 and the fourth segment 415 on the side away from the lower bottom 45 of the shell 41 , so that the elastic strip 49 can drive the support body 410 to retract into the shell 41 .

[0036] See also Figure 3 and Figure 4 In some embodiments, the pressure applying portion includes a cavity 47 and a flexible sealing portion 48. The cavity 47 is disposed in the housing 41, and a discharge port is disposed on one side of the cavity 47 close to the lower bottom 45 of the housing 41. The flexible sealing portion 48 closes the discharge port.

[0037] The number of the pressure applying parts may be two, corresponding to the first segment 412 and the fourth segment 415 . The flexible sealing part 48 is used to abut against the first segment 412 or the fourth segment 415 .

[0038] The cavity 47 cannot be deformed when the gas is injected, so that the gas entering the cavity 47 is discharged from the discharge port. The flexible sealing portion 48 seals the discharge port, so that when the gas is injected into the cavity 47, the flexible sealing portion 48 expands, thereby enabling the flexible sealing portion 48 to push the first segment 412 or the fourth segment 415 to move.

[0039] See also Figure 1 and Figure 2In some embodiments, the housing 41 includes two first side walls 411 disposed opposite to each other, and the driving component further includes two wing plates 43 and a hollow chamber 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 the two wing plates 43 are respectively provided with a plurality of through holes 44. The hollow chamber 419 is disposed between the two wing plates 43, and the hollow chamber 419 is communicated with the cavity 47.

[0040] Under the action of the hollow bag 419 , the two wing panels 43 may be in an open state initially.

[0041] When the shell 41 is gradually inserted between the backrest 12 and the seat cushion 11, the two wing panels 43 are also gradually squeezed and closed, so that the two wing panels 43 can squeeze the hollow bag 419, and the gas in the hollow bag 419 is squeezed into the cavity 47, so that the flexible sealing part 48 can expand.

[0042] At the same time, since the wing plate 43 is provided with a through hole 44, when the wing plate 43 squeezes the hollow bag 419, the hollow bag 419 can partially protrude from the through hole 44. In this way, when the wing plate 43 is between the backrest 12 and the seat cushion 11, the friction between the wing plate 43 and the driver's seat 1 can be increased, so that the hollow bag 419 can play an anti-slip effect.

[0043] The hollow bag 419 may be provided with a switch valve for controlling the inflation and discharge of gas in the hollow bag 419 .

[0044] See also Figure 5 In some embodiments, the flexible cover 42 includes two second side walls 418 arranged opposite to each other, and a space for accommodating the support body 410 is formed between the two second side walls 418. The two second side walls 418 are respectively provided with an inflation cavity 417, and the cavity 47 is provided with a pressure relief part, and the exhaust port of the pressure relief part is connected to the inflation cavity 417.

[0045] The pressure relief part may be selected from existing products. For example, the pressure relief part may be a pressure relief valve.

[0046] The pressure relief portion is used to discharge gas into the inflation cavity 417 of the second side wall 418 when the gas pressure in the cavity 47 increases to a threshold value.

[0047] Since the wing 43 gradually closes when the shell 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 part, when the flexible cover 42 is about to pass from one side of the driver's seat 1 to the other side (that is, the gap between the backrest 12 and the seat cushion 11 gradually increases), the pressure relief part opens and the gas enters the inflation cavity 417.

[0048] When the inflatable cavity 417 in 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 cushion 11. On the other hand, the inflatable cavity 417 gradually expands, so that the flexible cover 42 can assist the shell 41 to be inserted between the backrest 12 and the cushion 11. On the other hand, when the inflatable cavity 417 is fully expanded, the flexible cover 42 can prevent the shell 41 from withdrawing from between the backrest 12 and the cushion 11, so that the flexible cover 42 can fix the shell 41.

[0049] In the embodiment where the elastic strip 49 is provided with the first curved section and the second curved section, since the elastic strip 49 is formed with the first curved section and the second curved section, such a structure enables the first segment 412 and the second segment 413, the third segment 414 and the fourth segment 415 to respectively form a V-shaped structure. Under the action of the pressure applying part, the first segment 412 and the fourth segment 415 will move away from each other, so that the second segment 413 and the third segment 414 will also separate from each other, and then the pointed structure formed by the second segment 413 and the third segment 414 can become blunt, thereby reducing the risk of the second curved segment piercing the inflation cavity 417.

[0050] In the embodiment of the present application, a switch valve may also be provided on the passage connecting the pressure relief portion and the inflation chamber 417 to control the inflation and deflation of the inflation chamber 417 .

[0051] See also Figure 6 In some embodiments, 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 capsule in an inflated state, the spherical capsule is accommodated in the spherical cavity 31, and the collecting component 2 is connected to the spherical cavity 31.

[0052] When the gas is filled into the inflation cavity 417 of the second side wall 418, the second side wall 418 expands, and under the limiting effect of the inner wall of the spherical cavity 31, the flexible cover 42 expands to form a spherical structure, so that the flexible cover 42 can cooperate with the spherical cavity 31 to form a ball-head-like structure, 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, so as to facilitate the adjustment of the position of the collection component 2.

[0053] The spherical structure formed by the flexible cover 42 has the advantage of being lightweight. On the other hand, the flexible cover 42 is inflated and can produce a large deformation before being fully filled, so that the flexible cover 42 can enter the spherical cavity 31 even if the plug-in interface of the spherical cavity 31 is set to be small. After the flexible cover 42 enters the spherical cavity 31 from the plug-in interface, the flexible cover 42 is fully inflated. Since the plug-in interface of the spherical cavity 31 is set to be small, the coordination 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.

[0054] See also Figure 6 and Figure 7 In some embodiments, a limit plate 32 is rotatably disposed on the spherical cavity 31 around the circumference of the plug interface, and a plurality of elastic support arms 33 are disposed on the limit plate 32 around the circumference of the limit plate 32 .

[0055] The specific structure of the rotational connection between the limiting plate 32 and the spherical cavity 31 can be selected from the existing structures and will not be described in detail here.

[0056] The rotation axis of the limiting plate 32 may be parallel to the rotation axis of the plug interface.

[0057] Taking the case where the housing 41 passes from the back side to the front side of the driver's seat 1 as an example, when the flexible cover 42 passes through the driver's seat 1, the spherical cavity 31 is connected to the flexible cover 42 body and the position is adjusted, 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 and rotate the limit plate 32. When the limit plate 32 rotates, the elastic support arm 33 is deformed under the action of the seat cushion 11, so that the limit plate 32 can support the spherical cavity 31, thereby improving the stability of the spherical cavity 31.

[0058] The advantage of adjusting the elastic restoring force of the elastic support arm 33 by rotating the limit plate 32 is that, on the one hand, it is easy to adjust the state of the elastic support arm 33 so that the limit plate 32 can be in a state with the best support effect on the spherical cavity 31. Figure 7As shown in the figure, when the limit plate 32 is rotated, the distance between point A on the limit plate 32 and the seat cushion 11 changes from large to small, and then changes 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, and when the distance changes from small to large, the elastic restoring force generated by the elastic support arm 33 gradually decreases. If point A is facing the seat cushion 11, the limit plate 32 has the best support effect on the spherical cavity 31 at this time. After the spherical cavity 31 is connected to the flexible cover 42 and the angle of the spherical cavity 31 relative to the flexible cover 42 is adjusted, point A may not be facing the seat cushion 11. At this time, by rotating the limit plate 32, point A can be rotated to face 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 plate 32 has a certain inclination angle relative to the cushion 11, so that the elastic support arm 33 cannot contact the cushion 11 directly, under the action of the friction between the elastic support arm 33 and the cushion 11, when the limiting plate 32 is rotated, 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 is reduced, the elastic restoring force jointly generated by multiple elastic support arms 33 can still play a good supporting role for the spherical cavity 31. On the other hand, by rotating the limiting plate 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 limiting plate 32 is rotated to the right position, some of the contact points of the elastic support arms 33 and the cushion 11 can be manually adjusted so that the direction of the combined force of the elastic restoring forces generated by the multiple bent elastic support arms 33 can be adjusted, so that the limiting plate 32 can provide a better support effect.

[0059] See also Figure 8 In some embodiments, the limiting disk 32 is provided with an arc groove whose center is located at the axis of the plug interface. Along the radial direction of the plug interface, the spherical cavity 31 is provided with a sliding hole, and the sliding hole accommodates a pushing portion 39. In the arc groove, the limiting disk 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 provided 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 in the sliding hole.

[0060] The sliding hole is communicated with the interior 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.

[0061] A spring may be provided between the pushing portion 39 and the spherical cavity 31 , so that the pushing portion 39 can be partially inserted into the spherical cavity 31 when the flexible cover 42 is not expanded.

[0062] The arc groove is used to limit the rotation range of the limiting plate 32 relative to the spherical cavity 31 .

[0063] A limiting structure may be provided between the pushing portion 39 and the sliding hole to prevent the pushing portion 39 from escaping from the sliding hole. The specific structure of the limiting structure may be selected from existing structures.

[0064] The first elastic member 313 is connected to the second elastic portion, and the first elastic member 313 abuts against the first limiting portion 311 , so that the first elastic member 313 will not hinder the subsequent rotation of the limiting plate 32 .

[0065] The insertion portion 312 is used to limit the position of the limit plate 32 relative to the spherical cavity 31. When the insertion portion 312 is inserted into the sliding hole, the first elastic member 313 can be in a compressed state, and the limit plate 32 cannot rotate relative to the spherical cavity 31. When the flexible cover 42 expands, the flexible cover 42 pushes the push portion 39 to move, and then the push portion 39 pushes the insertion portion 312 out of the sliding hole. At this time, due to the large friction 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 limit plate 32 to rotate. The advantage of this arrangement is that, on the one hand, the inflation state of the flexible cover 42 can be judged, that is, when the limit plate 32 rotates, the flexible cover 42 has been inflated to the right position, and further inflation may cause the flexible cover 42 to over-expand and be damaged. On the other hand, multiple elastic support arms 33 can be arranged in the forward direction. For example, as shown in the figure, the limit plate 32 rotates, and the elastic support arms 33 that can contact the seat cushion 11 are all bent toward the same side to facilitate the subsequent manual rotation of the limit plate 32.

[0066] The first elastic member 313 may be a spring.

[0067] A spring may also be disposed between the inserting portion 312 and the first limiting portion 311 to provide an elastic force for inserting the inserting portion 312 into the sliding hole.

[0068] See also Figure 6 In some embodiments, the mounting assembly 3 further includes a telescopic rod 36 , the telescopic rod 36 is connected to the spherical cavity 31 , and the collecting component 2 is connected to the telescopic rod 36 .

[0069] The telescopic rod body 36 may 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 . 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 .

[0070] The collecting component 2 is connected to the telescopic rod 36 so that the position of the collecting component 2 relative to the spherical cavity 31 can be adjusted.

[0071] See also Figure 6 In some embodiments, the mounting assembly 3 further includes a connecting component, the connecting component includes a cylinder 37, the collecting component 2 is inserted into the cylinder 37, the cylinder 37 is threadedly connected with a limiting bolt 38, and the limiting bolt 38 abuts against the collecting component 2.

[0072] The limiting bolt 38 is used to lock or unlock the cylinder 37, that is, by rotating the limiting bolt 38, the limiting bolt 38 can apply force to the collection component 2, so that the collection component 2 is pressed against the inner wall of the cylinder 37, and the collection component 2 is locked in the cylinder 37. Conversely, the limiting bolt 38 is rotated so that the limiting bolt 38 is no longer in contact with the collection component 2, and the collection component 2 is unlocked, and the collection component 2 can be taken out of the cylinder 37. It should be noted that the collection end of the collection component 2 needs to be set outside the cylinder 37.

[0073] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A new energy vehicle noise testing system, comprising a collection component (2), characterized in that: It also includes a mounting component (3) and a fixing component (4), wherein the collecting component (2) is connected to the mounting component (3), and the fixing component (4) includes: The shell (41) is in a prism shape, the upper bottom (46) of the shell (41) is provided with an opening, and the mounting assembly (3) is detachably connected to the upper bottom (46) of the shell (41); A flexible cover (42) is pointed, and the flexible cover (42) covers the opening; A support body (410) is disposed in the shell (41), the support body (410) is inserted into the flexible cover (42) via the opening, and the support body (410) is movably connected to the shell (41) along a height direction of the shell (41); A driving component, used for driving the support body (410) to move along the height direction of the shell (41).

2. The new energy vehicle noise testing system according to claim 1, characterized in that: The driving component comprises: The elastic strip (49) comprises a first segment (412), a second segment (413), a third segment (414) and a fourth segment (415) which are connected in sequence, wherein the first segment (412) and the fourth segment (415) are connected to the shell (41), and the first segment (412), the second segment (413), the third segment (414) and the fourth segment (415) respectively form a first bend with the inner bend side facing the upper bottom (46) of the shell (41). The second segment (413) and the third segment (414) form a second curved segment with an inner curved side facing the lower bottom (45) of the shell (41), the second curved segment protrudes from a side of the support body (410) away from the lower bottom (45) of the shell (41), and along the height direction of the shell (41), the support body (410) is provided with two abutment portions (416) at intervals, and the second segment (413) is partially provided between the two abutment portions (416); The pressure-applying portion abuts against a side of the first segment (412) and the fourth segment (415) away from the lower bottom (45) of the shell (41).

3. The new energy vehicle noise testing system according to claim 2, characterized in that: The pressure applying part comprises: A cavity (47) is arranged on the shell (41), and a discharge port is arranged on a side of the cavity (47) close to the lower bottom (45) of the shell (41); A flexible sealing portion (48) closes the discharge port.

4. The new energy vehicle noise testing system according to claim 3, characterized in that: The housing (41) comprises two first side walls (411) arranged opposite to each other, and the driving component further comprises: 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 shell (41), and the two wing plates (43) are respectively provided with a plurality of through holes (44); The hollow bladder (419) is disposed between the two wing plates (43), and the hollow bladder (419) is in communication with the cavity (47).

5. The new energy vehicle noise testing system according to claim 3, characterized in that: The flexible cover (42) comprises 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), the two second side walls (418) are respectively provided with an inflation cavity (417), the cavity (47) is provided with a pressure relief portion, and an exhaust port of the pressure relief portion is in communication with the inflation cavity (417).

6. The new energy vehicle noise testing system according to claim 5, characterized in that: The mounting assembly (3) comprises a spherical cavity (31), the spherical cavity (31) being provided with an insertion interface, the two second side walls (418) being configured to form a spherical capsule in an inflated state, the spherical capsule being accommodated in the spherical cavity (31), and the collection component (2) being connected to the spherical cavity (31).

7. The new energy vehicle noise testing system according to claim 6, characterized in that: The spherical cavity (31) is rotatably provided with a limit plate (32) around the circumference of the plug interface, and the limit plate (32) is provided with a plurality of elastic support arms (33) around the circumference of the limit plate (32).

8. The new energy vehicle noise testing system according to claim 7, characterized in that: The limiting plate (32) is provided with an arc-shaped groove whose center is located at the axis of the plug-in interface. Along the radial direction of the plug-in interface, the spherical cavity (31) is provided with a sliding hole, and the sliding hole accommodates a pushing portion (39). In the arc-shaped groove, the limiting plate (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 provided 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 in the sliding hole.

9. The new energy vehicle noise testing system according to claim 6, characterized in that: The mounting assembly (3) further comprises a telescopic rod body (36), wherein the telescopic rod body (36) is connected to the spherical cavity (31), and the collecting component (2) is connected to the telescopic rod body (36).

10. The new energy vehicle noise testing system according to any one of claims 1 to 9, characterized in that: The collecting component (2) comprises a sound receiving microphone.

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