CN115165384B - Vehicle-mounted noise testing equipment - Google Patents
Vehicle-mounted noise testing equipment Download PDFInfo
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- CN115165384B CN115165384B CN202210525922.9A CN202210525922A CN115165384B CN 115165384 B CN115165384 B CN 115165384B CN 202210525922 A CN202210525922 A CN 202210525922A CN 115165384 B CN115165384 B CN 115165384B
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Abstract
The invention relates to vehicle-mounted noise testing equipment, which comprises an adjustable fixing seat, a three-way displacement adjusting mechanism and an audio receiving module, wherein the adjustable fixing seat is detachably connected with a vehicle seat, the connection tightness and the connection angle of the adjustable fixing seat are adjustable, the fixed end of the three-way displacement adjusting mechanism is fixedly arranged on the adjustable fixing seat, and the adjusting end of the three-way displacement adjusting mechanism can perform displacement adjustment relative to the XYZ direction of a vehicle body; the audio receiving module is arranged at the adjusting end of the three-way displacement adjusting mechanism. The vehicle-mounted noise testing equipment can be adapted to a real vehicle seat to perform noise testing in a vehicle, can be displaced relative to the vehicle body X, Y, Z according to requirements so as to adjust the measuring position, can better realize the noise environment testing in the vehicle, and can compensate the problem of the gap of the relevant abnormal noise testing means in the real vehicle seating cabin.
Description
Technical Field
The invention relates to the technical field of vehicle testing, in particular to vehicle-mounted noise testing equipment.
Background
Along with the improvement of the living standard of people and the rapid development of industrial technology, the requirements of people on household vehicles are not only limited to the points of constant attention of a plurality of years, such as large space, oil saving and low failure rate, but also the requirements on the comfort of the vehicles, particularly the noise in the vehicles, are higher and higher, so the noise in the vehicles is an important management and control index in the development process of the vehicles. Sources of in-vehicle noise generally include, for example, noise emitted from the interior of the seat belt, and noise from the seats, uprights, headliners, and associated accessory parts.
In the development process of automobiles, developers need to measure the noise level in the automobiles and lock and analyze noise abnormal sound points at various stages, and provide response solutions. In the process, abnormal sound grade judgment and abnormal sound source locking are required by means of a noise abnormal sound testing means. The prior art generally adopts the following schemes to measure the noise in the vehicle:
in the existing scheme 1, the measurement is carried out by a person holding noise test device in the vehicle development process, the measurement has instability, the requirement on the test person is high, and the test device cannot be fixed at a certain space position for a long time;
In the prior art 2, the four-upright post test simulation of the bench environment is performed, and the simulation of the bench environment is a relatively ideal environment which is different from the real vehicle environment to a certain extent and cannot completely replace the real vehicle environment.
Therefore, there is a need for an apparatus that can perform noise measurements in a real vehicle and adjust the measurement position as desired.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides vehicle-mounted noise testing equipment which can be adapted to a real vehicle seat to carry out noise testing in a vehicle, can carry out displacement relative to the XYZ direction of the vehicle body according to requirements so as to adjust the measuring position, and can better realize the noise environment testing in the vehicle.
The technical scheme for solving the technical problems is as follows:
The vehicle-mounted noise testing equipment comprises an adjustable fixing seat, a three-way displacement adjusting mechanism and an audio receiving module, wherein the adjustable fixing seat is detachably connected with a vehicle seat, the connection tightness and the connection angle of the adjustable fixing seat are adjustable, the fixed end of the three-way displacement adjusting mechanism is fixedly arranged on the adjustable fixing seat, and the adjusting end of the three-way displacement adjusting mechanism can carry out displacement adjustment relative to the XYZ direction of a vehicle body; the audio receiving module is arranged at the adjusting end of the three-way displacement adjusting mechanism.
On the basis of the technical scheme, the invention can be improved as follows.
Preferably, the adjustable fixing seat comprises a hinge shaft, a first bracket and a second bracket, wherein the first bracket and the second bracket are respectively and vertically arranged with the hinge shaft and are hinged to form a hinge structure, and the three-way displacement adjusting mechanism is fixedly arranged on the second bracket; an assembling clamping hook is fixedly arranged on the hinge shaft and is matched with an assembling interface of a vehicle; the first bracket is matched with the backrest of the vehicle seat, and the second bracket is matched with the cushion of the vehicle seat; the first bracket is provided with a fixed ratchet wheel, the second bracket is provided with a supporting rod, one end of the supporting rod is hinged with the second bracket, the other end of the supporting rod is fixedly provided with a pawl, and the pawl is meshed with the ratchet wheel; and when the compression bolt is rotated, the compression bolt can compress the pawl on the ratchet wheel.
Preferably, the adjustable fixing seat is further provided with a telescopic cylinder, one end of the telescopic cylinder is hinged with the first bracket, and the other end of the telescopic cylinder is hinged with the second bracket.
Preferably, the second bracket is provided with a levelness adjusting mechanism, and the three-way displacement adjusting mechanism is arranged on the second bracket through the levelness adjusting mechanism; the levelness adjusting mechanism comprises a plurality of vertical supporting frames, levelness adjusting gears and levelness adjusting toothed plates, and one end of the bottom of the three-way displacement adjusting mechanism is hinged with the second bracket through the vertical supporting frames, so that the three-way displacement adjusting mechanism can vertically rotate along a hinge point; the levelness adjusting toothed plate is vertically arranged at one end, deviating from the hinge point, of the three-way displacement adjusting mechanism, the levelness adjusting gear is vertically rotatably arranged on the second support through the vertical support frame, and the levelness adjusting gear is meshed with the levelness adjusting toothed plate.
Preferably, the gear surface of the levelness adjusting toothed plate is arc-shaped, and the arc-shaped is matched with the arc-shaped surface of the three-way displacement adjusting mechanism rotating along the hinge point.
Preferably, the three-way displacement adjusting mechanism comprises an X-direction adjusting module, a Y-direction adjusting module and a Z-direction adjusting module, wherein the X-direction, the Y-direction and the Z-direction are directions of a whole vehicle coordinate system; the fixed end of the X-direction adjusting module is connected with the adjustable fixing seat through the levelness adjusting mechanism, the adjusting end of the X-direction adjusting module is in transmission connection with the Y-direction adjusting module, the Z-direction adjusting module is in transmission connection with the Y-direction adjusting module, and the audio receiving module is arranged on the Z-direction adjusting module.
Preferably, the fixed end of the X-direction adjusting module comprises an X-direction supporting frame and two X-direction racks, wherein the X-direction racks are arranged on the top surface of the X-direction supporting frame along the X-direction, and the two X-direction racks are arranged side by side and are symmetrically arranged at two ends of the X-direction supporting frame perpendicular to the Y-direction; x-direction sliding grooves are respectively formed in two ends of adjacent X-direction racks on the X-direction supporting frame, and are arranged on the side face of the X-direction supporting frame; the adjusting end of the X-direction adjusting module comprises an X-direction driving motor, an X-direction driving gear, at least two X-direction driven gears and at least two X-direction sliding blocks, wherein at least two X-direction sliding blocks are symmetrically distributed in X-direction sliding grooves at two ends of the X-direction supporting frame and are correspondingly and slidably connected with the X-direction sliding grooves, and the X-direction sliding blocks are fixedly connected with the Y-direction adjusting module; the X-direction driving motor is fixedly arranged on the Y-direction adjusting module, an output shaft of the X-direction driving motor is coaxially arranged with the X-direction driving gear and is fixedly connected with the X-direction driving gear, and the X-direction driving gear is meshed with one of the X-direction driven gears for transmission; all the X-direction driven gears are coaxially arranged and fixedly connected through coaxially arranged transmission shafts, and at least two X-direction driven gears are respectively meshed with two X-direction racks for transmission; the transmission shaft is rotatably connected with the Y-direction adjusting module.
Preferably, the Y-direction adjusting module comprises a Y-direction supporting frame, a Y-direction rack, a Y-direction driving motor, a Y-direction driving gear and at least two Y-direction sliding blocks, wherein the Y-direction supporting frame is fixedly arranged on the X-direction sliding blocks, and the Y-direction rack is fixedly arranged on the Y-direction supporting frame along the Y-direction; the Y-direction driving motor is fixedly arranged on the Z-direction adjusting module, an output shaft of the Y-direction driving motor is coaxially arranged with the Y-direction driving gear and is fixedly connected with the Y-direction driving gear, and the Y-direction driving gear is meshed with the Y-direction rack for transmission; y-direction sliding grooves which are symmetrically distributed are formed in two sides of the Y-direction supporting frame, at least two Y-direction sliding blocks are correspondingly and slidably connected with the two Y-direction sliding grooves respectively, and the Y-direction sliding blocks are fixedly connected with the Z-direction adjusting module.
Preferably, the Z-direction adjusting module comprises a Z-direction supporting frame, a Z-direction sliding support, a Z-direction rack, a Z-direction driving motor, a Z-direction driving gear and a Z-direction sliding block, wherein the Z-direction supporting frame is fixedly connected with the Y-direction sliding block, a Z-direction sliding rail is arranged on the Z-direction supporting frame, and the Z-direction sliding block is fixedly arranged on the Z-direction sliding support and is in sliding connection with the Z-direction sliding rail; the Z-direction rack is arranged along the Z-direction and fixedly mounted on the Z-direction supporting frame, the Z-direction driving motor is fixedly mounted on the Z-direction supporting frame, an output shaft of the Z-direction driving motor is coaxially arranged with the Z-direction driving gear and is fixedly connected with the Z-direction driving gear, and the Z-direction driving gear is meshed with the Z-direction rack for transmission.
Preferably, the three-way displacement adjusting mechanism is further provided with an angle adjusting mechanism, the angle adjusting mechanism comprises a rotating shaft, a mounting box and a locking bolt, the rotating shaft is arranged along the Z direction, the bottom end of the rotating shaft is fixedly connected with the top end of the Z-direction sliding support, and the top end of the rotating shaft penetrates through the mounting box and is hinged with the mounting box, so that the mounting box can rotate around the Z direction; the side surface of the installation box is provided with a threaded through hole, the locking bolt is in threaded engagement with the threaded through hole, and the end part of the locking bolt extending into the installation box is in tight fit with the rotating shaft; the audio receiving module is disposed within the mounting box.
The beneficial effects of the invention are as follows: the test equipment provided by the invention is adjustably mounted with the vehicle seat by adopting the adjustable fixing seat, so that the reliability of the connection between the equipment and the vehicle seat is ensured, and the assembly is simple; the connection tightness and the installation angle between the equipment and the vehicle seat are adjustable, so that the equipment is applicable to seats with different backrest angles; the three-way displacement adjusting mechanism can be used for adjusting the direction position of the audio receiving module relative to the whole vehicle coordinate system X, Y, Z, so that the equipment can meet the multi-angle and multi-position noise test in the vehicle according to the test requirement, and the problem of the gap of the relevant abnormal noise test means in the riding cabin of the real vehicle is solved. The technical scheme of the invention has the advantages of simple structure, convenient operation and strong universality, and can be directly fixed on a real vehicle for measurement; the displacement adjustment in the X, Y, Z direction can be freely performed, so that the measurement range is wide.
Drawings
FIG. 1 is a schematic view of the use of the apparatus of the present invention;
FIG. 2 is a schematic view of the overall structure of the device according to the present invention at a certain view angle;
FIG. 3 is a schematic view of the overall structure of the apparatus of the present invention from another perspective;
FIG. 4 is a schematic view of an X-direction adjusting module structure of the device of the present invention;
FIG. 5 is a schematic diagram of the internal structure of an X-direction adjusting module of the device of the invention;
FIG. 6 is a schematic diagram of a Y-direction adjustment module of the apparatus of the present invention;
FIG. 7 is a schematic view of the Z-direction adjusting module of the device of the present invention;
fig. 8 is a schematic view of the angle adjusting mechanism of the apparatus of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the adjustable fixing seat, 101, a hinge shaft, 102, a first bracket, 103, a second bracket, 104, an assembling hook, 105, a ratchet, 106, a supporting rod, 107, a pawl, 108, a compression bolt, 109, a telescopic cylinder, 2, a three-way displacement adjusting mechanism, 21, an X-direction adjusting module, 2101, an X-direction supporting frame, 2102, an X-direction rack, 2103, an X-direction chute, 2104, an X-direction driving motor, 2105, an X-direction driving gear, 2106, an X-direction driven gear, 2107, an X-direction sliding block, 2108, a transmission shaft, 22, a Y-direction adjusting module, 2201, a Y-direction supporting frame, 2202, a Y-direction rack, 2203, Y-direction driving motor, 2204, Y-direction driving gear, 2205, Y-direction sliding block, 2206, Y-direction sliding groove, 23, Z-direction adjusting module, 2301, Z-direction supporting frame, 2302, Z-direction sliding bracket, 2303, Z-direction rack, 2304, Z-direction driving motor, 2305, Z-direction driving gear, 2306, Z-direction sliding block, 2307, Z-direction sliding rail, 3, audio receiving module, 4, levelness adjusting mechanism, 401, vertical supporting frame, 402, levelness adjusting gear, 403, levelness adjusting toothed plate, 5, angle adjusting mechanism, 501, rotating shaft, 502, mounting box, 503, locking bolt, a and hinge point.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1 to 3, the present embodiment provides a vehicle-mounted noise testing device, which includes an adjustable fixing seat 1, a three-way displacement adjusting mechanism 2 and an audio receiving module 3, wherein the adjustable fixing seat 1 is detachably connected with a vehicle seat, the connection tightness and the connection angle of the adjustable fixing seat are adjustable, the fixed end of the three-way displacement adjusting mechanism 2 is fixedly arranged on the adjustable fixing seat 1, and the adjusting end of the three-way displacement adjusting mechanism 2 can perform displacement adjustment relative to the XYZ direction of a vehicle body; the audio receiving module 3 is arranged at the adjusting end of the three-way displacement adjusting mechanism 2.
It is to be understood that the XYZ directions mentioned in the present embodiment are based on the entire vehicle coordinate system, in which the X direction approximates the front-rear direction (length direction) of the vehicle, the Y direction approximates the left-right side direction (width direction) of the vehicle, and the Z direction approximates the up-down direction (height direction) of the vehicle. Fig. 1 is a schematic view of a usage scenario of a test device according to the present embodiment, and in normal use, the test device according to the present embodiment is adjustably mounted with a vehicle seat by using an adjustable fixing seat 1, so as to ensure the reliability of connection between the device and the vehicle seat, and is simple to assemble. Through adjusting the installation angle of adjustable fixing base 1 for connection elasticity, the installation angle between equipment and the vehicle seat are adjustable, make the applicable different back angle seats of equipment, have increased the suitability of this equipment. The three-way displacement adjusting mechanism 2 can be used for adjusting the direction position of the audio receiving module 3 relative to the whole vehicle coordinate system X, Y, Z, so that the equipment can meet the multi-angle and multi-position noise test in the vehicle according to the test requirement, and the problem of the gap of the relevant abnormal sound noise test means in the riding cabin of the real vehicle is solved. The technical scheme of the embodiment has the advantages of simple structure, convenient operation and strong universality, can be directly fixed on a real vehicle for measurement, and has accurate measurement points; the displacement adjustment in the X, Y, Z direction can be freely performed, so that the measurement range is wide.
On the basis of the technical scheme, the embodiment can be further improved as follows.
As shown in fig. 2 and fig. 3, which are respectively overall structure diagrams of two different view angles of the present apparatus, the adjustable fixing base 1 includes a hinge shaft 101, a first support 102 and a second support 103, where the first support 102 and the second support 103 are respectively perpendicular to the hinge shaft 101 and are hinged to the hinge shaft 101 to form a hinge structure, so that the first support 102 and the second support 103 can respectively rotate around the hinge shaft 101, thereby adjusting the included angle between the first support 102 and the second support 103 to adapt to vehicle seats with different pitch angles. The three-way displacement adjusting mechanism 2 is fixedly arranged on the second support 103 and can synchronously move along with the second support 103. The assembly hook 104 is fixedly arranged on the hinge shaft 101, the assembly hook 104 is matched with an assembly interface of a vehicle, for example, is matched with an ISOFIX hook of a passenger car, and when a test is carried out, the assembly hook 104 is fixedly clamped with the ISOFIX hook, so that the assembly is simple, and time and labor are saved. The first support 102 is matched with the backrest of the vehicle seat, the second support 103 is matched with the cushion of the vehicle seat, and when the test device is suitable for seats with different pitching angles, the included angle between the first support 102 and the second support 103 can be flexibly adjusted, so that the first support 102 and the second support 103 are respectively kept to be adhered to and abutted against the backrest of the vehicle seat and the cushion of the vehicle seat, and the installation reliability of the test device is ensured. In order to reliably lock the angle between the first bracket 102 and the second bracket 103, a fixed ratchet 105 is arranged on the first bracket 102, a supporting rod 106 is arranged on the second bracket 103, one end of the supporting rod 106 is hinged with the second bracket 103, the other end of the supporting rod is fixedly provided with a pawl 107, and the pawl 107 is meshed with the ratchet 105; the first bracket 102 is further provided with a compression bolt 108, one end of the compression bolt 108 is provided with a knob, the other end of the compression bolt is in abutting fit with the supporting rod 106, and when the compression bolt 108 is rotated, the compression bolt 108 can compress the pawl 107 on the ratchet 105. The included angle is limited by the meshing locking action between the pawl 107 and the ratchet 105, and then the relative position of the pawl 107 and the ratchet 105 is further locked by the compression bolt 108, so that the structural firmness of the adjustable fixing seat 1 after the angle adjustment is improved.
As shown in fig. 2 and 3, the adjustable fixing base 1 is further provided with a telescopic cylinder 109, one end of the telescopic cylinder 109 is hinged to the first bracket 102, and the other end of the telescopic cylinder 109 is hinged to the second bracket 103. The telescopic cylinder 109 provides power for the angle adjustment of the first bracket 102 and the second bracket 103 and carries out structural support in the testing process, so that the angle of the first bracket 102 and the angle of the second bracket 103 in the testing process are prevented from being deviated, the firmness of the installation of equipment on a vehicle seat is influenced, and the measurement accuracy of the equipment in the measuring process is further influenced.
As shown in fig. 2 to 4, the second support 103 is provided with a levelness adjusting mechanism 4, and the three-way displacement adjusting mechanism 2 is installed on the second support 103 through the levelness adjusting mechanism 4; the levelness adjusting mechanism 4 comprises a plurality of vertical supporting frames 401, levelness adjusting gears 402 and levelness adjusting toothed plates 403, and one end of the bottom of the three-way displacement adjusting mechanism 2 is hinged with the second support 103 through the vertical supporting frames 401, so that the three-way displacement adjusting mechanism 2 can vertically rotate along a hinge point a; the levelness adjustment toothed plate 403 is vertically installed at one end of the three-way displacement adjustment mechanism 2, which is away from the hinge point a, the levelness adjustment gear 402 is vertically rotatably arranged on the second support 103 through the vertical support 401, and the levelness adjustment gear 402 is meshed with the levelness adjustment toothed plate 403.
The levelness adjusting mechanism 4 is used for adjusting the levelness of the three-way displacement adjusting mechanism 2 after the adjustable fixing seat 1 is installed in place on the vehicle seat, so that the three-way displacement adjusting mechanism 2 is consistent with the direction of the whole vehicle coordinate system, the accuracy of adjusting the coordinate position of the audio receiving module 3 in the whole vehicle coordinate system in the test process is ensured, and the accuracy of test data is ensured.
As shown in fig. 2 to 4, the gear surface of the levelness adjustment toothed plate 403 is arc-shaped, and the arc-shaped is matched with the arc surface of the three-way displacement adjustment mechanism 2 rotating along the hinge point a, so that when the levelness adjustment is performed, the levelness adjustment gear 402 and the levelness adjustment toothed plate 403 are meshed and driven, the matching tightness of the levelness adjustment gear 402 and the levelness adjustment toothed plate 403 is kept unchanged, and the mechanical abrasion degree of the levelness adjustment mechanism 4 is reduced, and the service life of equipment is prolonged.
As shown in fig. 2 to 3, the three-way displacement adjustment mechanism 2 includes an X-direction adjustment module 21, a Y-direction adjustment module 22, and a Z-direction adjustment module 23, wherein the X-direction, the Y-direction, and the Z-direction are directions of a whole vehicle coordinate system; the fixed end of the X-direction adjusting module 21 is connected with the adjustable fixing seat 1 through the levelness adjusting mechanism 4, the adjusting end of the X-direction adjusting module 21 is in transmission connection with the Y-direction adjusting module 22, the Z-direction adjusting module 23 is in transmission connection with the Y-direction adjusting module 22, and the audio receiving module 3 is arranged on the Z-direction adjusting module 23. The X-direction adjusting module 21 adjusts the X-direction displacement of the audio receiving module 3, the Y-direction adjusting module 22 adjusts the Y-direction displacement of the audio receiving module 3, and the Z-direction adjusting module 23 adjusts the Z-direction displacement of the audio receiving module 3. The three are mutually cooperated, and the three-dimensional space coordinate position of the audio receiving module 3 can be flexibly adjusted, so that each test point in the vehicle is adapted.
As shown in fig. 4 to 5, the fixed end of the X-direction adjusting module 21 includes an X-direction supporting frame 2101 and two X-direction racks 2102, the X-direction racks 2102 are disposed on the top surface of the X-direction supporting frame 2101 along the X-direction, and the two X-direction racks 2102 are disposed side by side and symmetrically disposed at two ends of the X-direction supporting frame 2101 perpendicular to the Y-direction; two ends of adjacent X-direction racks 2102 on the X-direction support frame 2101 are respectively provided with an X-direction chute 2103, and the X-direction chute 2103 is arranged on the side surface of the X-direction support frame 2101; the adjusting end of the X-direction adjusting module 21 comprises an X-direction driving motor 2104, an X-direction driving gear 2105, at least two X-direction driven gears 2106 and at least two X-direction sliding blocks 2107, at least two X-direction sliding blocks 2107 are symmetrically distributed in X-direction sliding grooves 2103 at two ends of an X-direction supporting frame 2101 and are correspondingly and slidably connected with the X-direction sliding grooves 2103, and the X-direction sliding blocks 2107 are fixedly connected with the Y-direction adjusting module 22; the X-direction driving motor 2104 is fixedly installed on the Y-direction adjusting module 22, an output shaft of the X-direction driving motor 2104 is coaxially arranged with the X-direction driving gear 2105 and is fixedly connected with the X-direction driving gear 2105, and the X-direction driving gear 2105 is meshed with one of the X-direction driven gears 2106 for transmission; all the X-direction driven gears 2106 are coaxially arranged and fixedly connected through a transmission shaft 2108 which is coaxially arranged, and at least two X-direction driven gears 2106 are respectively meshed with two X-direction racks 2102 for transmission. The drive shaft 2108 is rotatably mounted to the bottom of the Y-direction adjustment module 22.
In this embodiment, the X-direction driving motor 2104 operates to drive the X-direction driving gear 2105 to rotate, and the X-direction driving gear 2105 drives the X-direction driven gear 2106 to synchronously rotate, so that the adjusting end of the X-direction adjusting module 21 is driven to displace along the X-direction rack 2102 due to the meshing transmission effect of the X-direction driven gear 2106 and the X-direction rack 2102, thereby realizing the X-direction displacement adjustment of the audio receiving module 3. The X-direction sliding blocks 2107 are connected in a sliding manner in the X-direction sliding grooves 2103, and the X-direction sliding blocks 2107 positioned at two ends of the X-direction supporting frame 2101 are matched with each other to fix the Y-direction adjusting module 22 on the X-direction adjusting module 21 in a sliding manner along the X-direction, so that the Y-direction adjusting module 22 is prevented from falling off from the X-direction adjusting module 21. In this embodiment, two X-direction racks 2102 are parallel and symmetrically disposed at two ends of the X-direction support frame 2101, as shown in fig. 5, which is an internal structure diagram of the X-direction adjusting module 21 after hiding the Y-direction support frame 2201, three X-direction driven gears 2106 are disposed, and the three X-direction driven gears 2106 are coaxially disposed and fixedly connected through a transmission shaft 2108. The transmission shaft 2108 is movably connected with the Y-direction adjusting module 22 and can rotate along the axial direction of the transmission shaft 2108, so that when the X-direction driven gear 2106 performs X-direction displacement relative to the X-direction rack 2102, the Y-direction adjusting module 22 is driven to synchronously perform X-direction displacement. The X-direction driven gear 2106 in the middle is used for being meshed with the X-direction driving gear 2105 for transmission, the two X-direction driven gears 2106 at two ends are respectively meshed with the two X-direction racks 2102 for transmission, and the two X-direction driven gears 2106 not only provide a transmission function, but also provide a structural support function, so that equipment can run more stably and smoothly when X-direction displacement adjustment is carried out.
Referring to fig. 4 and 6, the Y-direction adjusting module 22 includes a Y-direction support frame 2201, a Y-direction rack 2202, a Y-direction driving motor 2203, a Y-direction driving gear 2204, and at least two Y-direction sliders 2205, wherein the Y-direction support frame 2201 is fixedly mounted on the X-direction slider 2107, and the Y-direction rack 2202 is fixedly mounted on the Y-direction support frame 2201 along the Y-direction; the Y-direction driving motor 2203 is fixedly mounted on the Z-direction adjusting module 23, an output shaft of the Y-direction driving motor is coaxially arranged with the Y-direction driving gear 2204 and is fixedly connected with the Y-direction driving gear 2204, and the Y-direction driving gear 2204 is meshed with the Y-direction rack 2202 for transmission; the two sides of the Y-direction support frame 2201 perpendicular to the X-direction are provided with symmetrically distributed Y-direction sliding grooves 2206, at least two Y-direction sliding blocks 2205 are respectively and slidably connected with the two Y-direction sliding grooves 2206, and the Y-direction sliding blocks 2205 are fixedly connected with the Z-direction adjusting module 23.
The Y-direction support frame 2201 provides structural support, the Y-direction drive motor 2203 is installed on the Z-direction adjustment module 23, the Y-direction drive motor 2203 runs to drive the Y-direction drive gear 2204 to rotate, and the Y-direction adjustment module 23 is driven to perform Y-direction displacement adjustment relative to the Y-direction rack 2202 due to the meshing transmission effect of the Y-direction drive gear 2204 and the Y-direction rack 2202, so that the Y-direction displacement adjustment of the Z-direction adjustment module 23 and the audio receiving module 3 on the Y-direction adjustment module 22 is realized. In this process, the Y-direction slider 2205 is slidably connected in the Y-direction sliding groove 2206, and the Y-direction sliders 2205 located at two ends of the Y-direction support frame 2201 cooperate with each other to fix the Z-direction adjusting module 23 on the Y-direction adjusting module 22 so as to slide along the Y-direction, thereby preventing the Z-direction adjusting module 23 from falling off the Y-direction adjusting module 22.
As shown in fig. 7, the Z-direction adjusting module 23 includes a Z-direction support frame 2301, a Z-direction sliding bracket 2302, a Z-direction rack 2303, a Z-direction driving motor 2304, a Z-direction driving gear 2305, and a Z-direction slider 2306, wherein the Z-direction support frame 2301 is fixedly connected with the Y-direction slider 2205, a Z-direction sliding rail 2307 is provided on the Z-direction support frame 2301, the Z-direction slider 2306 is fixedly provided on the Z-direction sliding bracket 2302, and the Z-direction slider 2306 is slidably connected with the Z-direction sliding rail 2307; the Z-directional rack 2303 is disposed along the Z-direction and is fixedly mounted on the Z-directional support frame 2301, the Z-directional driving motor 2304 is fixedly mounted on the Z-directional support frame 2301, an output shaft thereof is coaxially disposed with and fixedly connected to the Z-directional driving gear 2305, and the Z-directional driving gear 2305 is meshed with the Z-directional rack 2303 for transmission.
The Z-direction support frame 2301 provides structural support for the entire Z-direction adjustment module 23 and the audio receiving module 3 above it. The Z-direction sliding support 2302 is in sliding connection with a Z-direction sliding rail 2307 on the Z-direction supporting frame 2301 through a Z-direction sliding block 2306, when the Z-direction driving motor 2304 operates, the Z-direction driving gear 2305 is driven to rotate, and the Z-direction driving gear 2305 is meshed with the Z-direction rack 2303 for transmission, so that the Z-direction rack 2303 drives the Z-direction sliding support 2302 to displace along the Z-direction, and Z-direction adjustment of the audio receiving module 3 mounted on the Z-direction sliding support 2302 is realized.
As shown in the partial schematic diagram of fig. 8, the three-way displacement adjustment mechanism 2 is further provided with an angle adjustment mechanism 5, the angle adjustment mechanism 5 includes a rotating shaft 501, a mounting box 502 and a locking bolt 503, the rotating shaft 501 is disposed along the Z direction, the bottom end of the rotating shaft 501 is fixedly connected with the top end of the Z-direction sliding support 2302, and the top end of the rotating shaft 501 penetrates through the mounting box 502 and is hinged with the mounting box 502, so that the mounting box 502 can rotate around the Z direction; the side surface of the installation box 502 is provided with a threaded through hole, the locking bolt 503 is in threaded engagement with the threaded through hole, and the end part of the locking bolt 503 extending into the installation box 502 is in tight fit with the rotating shaft 501; the audio receiving module 3 is disposed in the mounting box 502.
The rotating shaft 501 is used for providing rotatable structural support for the mounting box 502, so that after the audio receiving module 3 is mounted and fixed on the mounting box 502, the audio receiving module 3 can rotate along the axial direction of the rotating shaft 501 to adjust the circumferential angle of the audio receiving module 3. The locking bolt 503 is used for locking the mounting box 502 on the rotating shaft 501 after the angle adjustment of the mounting box 502 is completed, so as to prevent the mounting box 502 from deflecting angularly. The locking bolt 503 may be a butterfly bolt as shown in fig. 8 or other bolt that facilitates the rotation operation.
Working principle:
The test equipment of this embodiment adopts adjustable fixing base 1 and vehicle seat to install adjustably, guarantees the reliability of equipment and vehicle seat connection, and the assembly is simple. When the adjustable fixing seat is used, the assembling clamping hook 104 on the adjustable fixing seat 1 is directly clamped into the existing interface of the passenger car, for example, the adjustable fixing seat is matched with an ISOFIX hook of the passenger car, so that the adjustable fixing seat is simple to assemble, and time and labor are saved. Then, the included angle between the first bracket 102 and the second bracket 103 is adjusted, so that the first bracket 102 is matched with the backrest of the vehicle seat, and the second bracket 103 is matched with the cushion of the vehicle seat. The angle of the adjustable fixing seat 1 is adjustable, so that the test equipment is applicable to seats with different backrest angles, and the applicability of the equipment is improved. And then the levelness of the three-way displacement adjusting mechanism 2 is adjusted through the levelness adjusting mechanism 4. According to the test requirement, the space coordinate position of the audio receiving module 3 is adjusted by the X-direction adjusting module 21, the Y-direction adjusting module 22 and the Z-direction adjusting module 23 of the three-way displacement adjusting mechanism 2 so as to move to the target point to be tested. The circumferential angle of the audio receiving module 3 is then adjusted by the angle adjusting mechanism 5, and the angle is locked by the locking bolt 503. At this time, the adjustment of the audio receiving module 3 is completed, and the test can be started.
Compared with the existing test equipment, the equipment of the embodiment is directly fixed in the real vehicle environment and is closer to the actual use situation than a laboratory vibration table; the fixed adjusting device can be directly fixed through the ISOFIX hooks of the existing vehicle-mounted child seat, can adapt to different backrest angles and seat cushions, does not need to newly add corresponding in-vehicle fixing tools, and has strong universality; compared with a general test scheme, the existing measurement scheme can realize automatic adjustment of the whole vehicle coordinate system X, Y, Z in three directions, can more accurately simulate the sitting position and the audiometric position of passengers, can also test different noises and abnormal sounds in the passenger cabin according to measurement requirements, and can compensate the problem of the blank of related abnormal sound noise test means in the real vehicle sitting cabin. The technical scheme of the embodiment has the advantages of simple structure, convenient operation and strong universality, can be directly fixed on a real vehicle for measurement, and has accurate measurement points; the displacement adjustment in the X, Y, Z direction can be freely performed, so that the measurement range is wide.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The vehicle-mounted noise testing equipment is characterized by comprising an adjustable fixing seat (1), a three-way displacement adjusting mechanism (2) and an audio receiving module (3), wherein the adjustable fixing seat (1) is detachably connected with a vehicle seat, the connection tightness and the connection angle of the adjustable fixing seat are adjustable, the fixed end of the three-way displacement adjusting mechanism (2) is fixedly arranged on the adjustable fixing seat (1), and the adjusting end of the three-way displacement adjusting mechanism (2) can perform displacement adjustment relative to the XYZ direction of a vehicle body; the audio receiving module (3) is arranged at the adjusting end of the three-way displacement adjusting mechanism (2);
The adjustable fixing seat (1) comprises a hinge shaft (101), a first support (102) and a second support (103), wherein the first support (102) and the second support (103) are respectively and vertically arranged with the hinge shaft (101) and are hinged to form a hinge structure, and the three-way displacement adjusting mechanism (2) is fixedly arranged on the second support (103); an assembling clamping hook (104) is fixedly arranged on the hinge shaft (101), and the assembling clamping hook (104) is matched with an assembling interface of a vehicle; the first bracket (102) is matched with a backrest of the vehicle seat, and the second bracket (103) is matched with a cushion of the vehicle seat.
2. The vehicle-mounted noise testing device according to claim 1, wherein a fixed ratchet wheel (105) is arranged on the first support (102), a supporting rod (106) is arranged on the second support (103), one end of the supporting rod (106) is hinged with the second support (103), a pawl (107) is fixedly arranged at the other end of the supporting rod, and the pawl (107) is meshed with the ratchet wheel (105); the first bracket (102) is also provided with a compression bolt (108), one end of the compression bolt (108) is provided with a knob, the other end of the compression bolt is in butt fit with the supporting rod (106), and when the compression bolt (108) is rotated, the compression bolt (108) can compress the pawl (107) on the ratchet wheel (105).
3. The vehicle-mounted noise testing device according to claim 2, wherein the adjustable fixing seat (1) is further provided with a telescopic cylinder (109), one end of the telescopic cylinder (109) is hinged with the first bracket (102), and the other end of the telescopic cylinder (109) is hinged with the second bracket (103).
4. The vehicle-mounted noise testing device according to claim 2, wherein a levelness adjusting mechanism (4) is arranged on the second support (103), and the three-way displacement adjusting mechanism (2) is arranged on the second support (103) through the levelness adjusting mechanism (4); the levelness adjusting mechanism (4) comprises a plurality of vertical supporting frames (401), levelness adjusting gears (402) and levelness adjusting toothed plates (403), one end of the bottom of the three-way displacement adjusting mechanism (2) is hinged with the second support (103) through the vertical supporting frames (401), and the three-way displacement adjusting mechanism (2) can vertically rotate along a hinge point (a); the levelness adjusting toothed plate (403) is vertically arranged at one end, deviating from the hinge point (a), of the three-way displacement adjusting mechanism (2), the levelness adjusting gear (402) is vertically rotatably arranged on the second support (103) through the vertical support frame (401), and the levelness adjusting gear (402) is meshed with the levelness adjusting toothed plate (403).
5. The vehicle-mounted noise testing device according to claim 4, wherein the gear surface of the levelness adjusting toothed plate (403) is arc-shaped, and the arc-shaped is matched with the arc-shaped surface of the three-way displacement adjusting mechanism (2) rotating along the hinging point (a).
6. The vehicle-mounted noise testing device according to claim 4, wherein the three-way displacement adjusting mechanism (2) comprises an X-direction adjusting module (21), a Y-direction adjusting module (22) and a Z-direction adjusting module (23), wherein the X-direction, the Y-direction and the Z-direction are directions of a whole vehicle coordinate system; the fixed end of the X-direction adjusting module (21) is connected with the adjustable fixing seat (1) through the levelness adjusting mechanism (4), the adjusting end of the X-direction adjusting module (21) is in transmission connection with the Y-direction adjusting module (22), the Z-direction adjusting module (23) is in transmission connection with the Y-direction adjusting module (22), and the audio receiving module (3) is arranged on the Z-direction adjusting module (23).
7. The vehicle-mounted noise testing device according to claim 6, wherein the fixed end of the X-direction adjusting module (21) comprises an X-direction supporting frame (2101) and two X-direction racks (2102), the X-direction racks (2102) are arranged on the top surface of the X-direction supporting frame (2101) along the X-direction, and the two X-direction racks (2102) are arranged side by side and symmetrically arranged at two ends of the X-direction supporting frame (2101) perpendicular to the Y-direction; two ends of adjacent X-direction racks (2102) on the X-direction support frame (2101) are respectively provided with an X-direction chute (2103), and the X-direction chute (2103) is arranged on the side surface of the X-direction support frame (2101); the X-direction adjusting module (21) comprises an X-direction driving motor (2104), an X-direction driving gear (2105), at least two X-direction driven gears (2106) and at least two X-direction sliding blocks (2107), wherein at least two X-direction sliding blocks (2107) are symmetrically distributed in X-direction sliding grooves (2103) at two ends of an X-direction supporting frame (2101) and are correspondingly and slidably connected with the X-direction sliding grooves (2103), and the X-direction sliding blocks (2107) are fixedly connected with the Y-direction adjusting module (22); the X-direction driving motor (2104) is fixedly arranged on the Y-direction adjusting module (22), an output shaft of the X-direction driving motor is coaxially arranged with the X-direction driving gear (2105) and is fixedly connected with the X-direction driving gear (2105), and the X-direction driving gear (2105) is meshed with one of the X-direction driven gears (2106) for transmission; all the X-direction driven gears (2106) are coaxially arranged and fixedly connected through a transmission shaft (2108) which is coaxially arranged at 2106, and at least two X-direction driven gears (2106) are respectively meshed with two X-direction racks (2102) for transmission; the drive shaft (2108) is rotatably connected with the Y-direction adjustment module (22).
8. The vehicle-mounted noise testing apparatus of claim 7, wherein the Y-direction adjustment module (22) comprises a Y-direction support frame (2201), a Y-direction rack (2202), a Y-direction drive motor (2203), a Y-direction drive gear (2204), and at least two Y-direction sliders (2205), the Y-direction support frame (2201) being fixedly mounted on the X-direction sliders (2107), the Y-direction rack (2202) being fixedly mounted on the Y-direction support frame (2201) along the Y-direction; the Y-direction driving motor (2203) is fixedly arranged on the Z-direction adjusting module (23), an output shaft of the Y-direction driving motor is coaxially arranged with the Y-direction driving gear (2204) and is fixedly connected with the Y-direction driving gear (2204), and the Y-direction driving gear (2204) is meshed with the Y-direction rack (2202) for transmission; y is to Y to both sides in perpendicular X to be equipped with symmetrical distribution on braced frame (2201) to spout (2206), at least two Y to slider (2205) correspond sliding connection with two Y to spout (2206) respectively, Y to slider (2205) with Z is to adjusting module (23) fixed connection.
9. The vehicle-mounted noise testing device according to claim 8, wherein the Z-direction adjusting module (23) comprises a Z-direction supporting frame (2301), a Z-direction sliding bracket (2302), a Z-direction rack (2303), a Z-direction driving motor (2304), a Z-direction driving gear (2305) and a Z-direction sliding block (2306), the Z-direction supporting frame (2301) is fixedly connected with the Y-direction sliding block (2205), a Z-direction sliding rail (2307) is arranged on the Z-direction supporting frame (2301), the Z-direction sliding block (2306) is fixedly arranged on the Z-direction sliding bracket (2302), and the Z-direction sliding block (2306) is slidably connected with the Z-direction sliding rail (2307); the Z-direction rack (2303) is arranged along the Z direction and fixedly installed on the Z-direction support frame (2301), the Z-direction drive motor (2304) is fixedly installed on the Z-direction support frame (2301), an output shaft of the Z-direction drive motor is coaxially arranged with the Z-direction drive gear (2305) and is fixedly connected with the Z-direction drive gear (2305), and the Z-direction drive gear (2305) is meshed with the Z-direction rack (2303) for transmission.
10. The vehicle-mounted noise testing equipment according to claim 9, wherein the three-way displacement adjusting mechanism (2) is further provided with an angle adjusting mechanism (5), the angle adjusting mechanism (5) comprises a rotating shaft (501), a mounting box (502) and a locking bolt (503), the rotating shaft (501) is arranged along the Z direction, the bottom end of the rotating shaft (501) is fixedly connected with the top end of the Z-direction sliding support (2302), and the top end of the rotating shaft (501) penetrates through the mounting box (502) and is hinged with the mounting box (502) so that the mounting box (502) can rotate around the Z direction; the side surface of the installation box (502) is provided with a threaded through hole, the locking bolt (503) is in threaded engagement with the threaded through hole, and the end part of the locking bolt (503) extending into the installation box (502) is in tight fit with the rotating shaft (501); the audio receiving module (3) is arranged in the mounting box (502).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210525922.9A CN115165384B (en) | 2022-05-12 | Vehicle-mounted noise testing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210525922.9A CN115165384B (en) | 2022-05-12 | Vehicle-mounted noise testing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115165384A CN115165384A (en) | 2022-10-11 |
| CN115165384B true CN115165384B (en) | 2024-05-31 |
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