CN209910930U - Whole car vibration test device - Google Patents
Whole car vibration test device Download PDFInfo
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- CN209910930U CN209910930U CN201920489473.0U CN201920489473U CN209910930U CN 209910930 U CN209910930 U CN 209910930U CN 201920489473 U CN201920489473 U CN 201920489473U CN 209910930 U CN209910930 U CN 209910930U
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- wheel
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Abstract
The utility model discloses a whole car vibration test device, including main tributary support frame, preceding supporting component, preceding drive assembly and back supporting component. With the double drum structure that is parallel and front and back side by side setting of wheel contact, the wheel is located between two cylinders, when the wheel has the trend of skew forward, the cylinder of front side has the hindrance effect to the wheel, when the wheel has the trend of skew backward, the cylinder of rear side has the hindrance effect to the wheel, makes the contact of wheel and two cylinders more stable, can effectively reduce the front and back offset of wheel. The utility model discloses front and back wheel location nature is good, has effectively reduced the back-and-forth movement of whole car in the detection, has improved detection efficiency.
Description
Technical Field
The utility model belongs to the technical field of vehicle detection equipment, especially, relate to a whole car vibration test device.
Background
The motor vehicle refers to a wheeled vehicle driven or towed by a power device, running on a road, and used for riding or/and transporting articles or performing special operations. Can be classified into automobiles, motorcycles, tractor transport units, wheel-type special mechanical vehicles, electric vehicles and the like. In the production process of the whole motor vehicle, the performance of the whole motor vehicle is often detected by using vibration test detection equipment, and whether the performance meets the national standard or the industrial standard is judged. The existing whole vehicle vibration test equipment generally places wheels on single rollers respectively for whole vehicle detection, the contact of the wheels and the rollers is a line, the outer surface of the rollers is circular, so that the rotation stability of the wheels on the single rollers is poor, and the wheels are easy to deviate forwards and backwards; the wheel clamp has poor fixity, so that the whole vehicle is easy to move back and forth in the up-and-down bumping process, the detection is influenced, and the detection efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a whole car vibration test device, the front and back wheel location nature is good, has effectively reduced the back-and-forth movement of whole car in the detection, has improved detection efficiency.
The utility model provides a whole car vibration test device, includes the main tributary strut, the top of main tributary strut is equipped with test platform, test notch and back test notch before being equipped with on the test platform still include:
the front support assembly is arranged corresponding to the position of the front test notch, is used for providing support for front wheels of the whole vehicle, and comprises a front support frame, front rollers and a front wheel clamp mechanism, wherein one front wheel is arranged corresponding to two front rollers, each two front rollers are arranged on the front support frame in parallel and in a front-back side-by-side mode, and the front wheel clamp mechanism is arranged on the upper surface of the front support frame;
the front driving assembly is used for driving one of the two front rollers to rotate;
rear support assembly, rear support assembly corresponds the setting of back test breach position for the rear wheel of whole car provides the support, including rear support frame, rear drum and rear wheel anchor clamps mechanism, one the rear wheel corresponds two the rear drum sets up, per two the parallel front and back side by side of rear drum is located on the rear support frame, rear wheel anchor clamps mechanism locates the rear support frame upper surface.
The front wheel clamp mechanism comprises a front mounting plate, a front baffle assembly, two first connecting rods and two second connecting rods, the front baffle assembly is rotatably connected with the front mounting plate and is abutted to the front wheels, two ends of the front baffle assembly are respectively hinged to one end of each first connecting rod, the other end of each first connecting rod is hinged to one end of each second connecting rod, and the other end of each second connecting rod is connected with a wheel shaft of the front wheel through a shaft.
Preferably, in the above technical solution, the front wheel clamp mechanism further includes a front fixing plate and a guide sliding member, and the guide sliding member is configured such that the front mounting plate can move back and forth on the front fixing plate.
Preferably, in the above technical solution, the front driving assembly includes a motor and a belt transmission device connected to each other, and the belt transmission device is connected to one of the two front rollers.
According to the preferable technical scheme, the front roller connected with the belt transmission device is provided with a plurality of protruding blocks.
Above technical scheme is preferred, rear wheel anchor clamps mechanism includes rear mounting panel and rear catch wheel subassembly, rear catch wheel subassembly with the rear mounting panel rotates to be connected, rear catch wheel subassembly with the rear wheel is inconsistent.
Preferably, in the above technical solution, the rear wheel clamp mechanism further includes a rear fixing plate and a guide sliding member, and the guide sliding member is configured such that the rear mounting plate can move back and forth on the rear fixing plate.
Preferably, in the above technical solution, a plurality of bumps are provided on the surface of one of every two rear drums.
Preferably, in the above technical solution, a guide sliding component is arranged between the front support frame and/or the rear support frame and the main support frame.
Preferably, in the above technical solution, the front support assembly includes two front rollers, the two front rollers correspond to one front wheel, the rear support assembly includes four rear rollers, and every two rear rollers correspond to one rear wheel.
The utility model has the advantages and positive effects that: the utility model provides a pair of whole car vibration test device, the double drum structure that is parallel and set up side by side around with the wheel contact, the wheel is located between two cylinders, when the wheel has the trend of skew forward, the cylinder of front side has the hindrance effect to the wheel, when the wheel has the trend of skew backward, the cylinder of rear side has the hindrance effect to the wheel, makes the contact of wheel and two cylinders more stable, can effectively reduce the front and back offset of wheel; a front stop wheel component in the front wheel clamp mechanism is abutted against the front wheel and has a thrust function; the second connecting rod is connected with a wheel shaft of the front wheel through a shaft, the second connecting rod is hinged with the first connecting rod, the first connecting rod is hinged with the front stop wheel assembly, and the influence of shaking on the front wheel in the detection process can be buffered through the rotation of parts at the hinged parts, so that the front and back movement of the front wheel is effectively reduced; a rear catch wheel component in the rear wheel clamp mechanism is abutted against the rear wheel, and has a thrust function; the utility model discloses front and back wheel location nature is good, has effectively reduced the back-and-forth movement of whole car in the detection, has improved detection efficiency.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a cross-sectional view A-A of FIG. 2;
FIG. 6 is a cross-sectional view C-C of FIG. 2;
FIG. 7 is a cross-sectional view D-D of FIG. 3;
FIG. 8 is a cross-sectional view E-E of FIG. 3;
fig. 9 is a schematic structural view of a front wheel clamp mechanism according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a rear wheel clamp mechanism according to an embodiment of the present invention.
Wherein:
1. a main supporting frame; 11. a test platform; 111. a pre-test gap; 112. post-testing the notch; 12. a slide rail;
2. a front support assembly; 21. a front support frame; 22. a front drum; 23. a front wheel clamp mechanism; 211. a slider; 221. a raised block; 231. a front mounting plate; 232. a front catch assembly; 233. a first link; 234. a second link; 235. a shaft; 236. a front fixing plate;
3. a front drive assembly;
4. a rear support assembly; 41. a rear support frame; 42. a rear drum; 43. a rear wheel clamp mechanism; 421. a raised block; 431. a rear mounting plate; 432. a rear catch wheel assembly; 433. a rear fixing plate;
5. a front wheel; 6. a rear wheel.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment provides a finished automobile vibration test device, as shown in fig. 1-4, which includes a main support frame 1, a front support assembly 2, a front drive assembly 3, and a rear support assembly 4, where the main support frame 1 serves as a base of the whole device to support each component; the front support assembly 2 is used for providing support for a front wheel 5 of the whole vehicle; the front driving assembly 3 is used for providing power for the rotation of the front wheel 5; the rear support assembly 4 is used to provide support for the rear wheels 6 of the vehicle.
A test platform 11 is arranged above the main support frame 1, and a front test notch 111 and a rear test notch 112 are arranged on the test platform 11; the front support assembly 2 is arranged corresponding to the front test notch 111 and comprises a front support frame 21, a front roller 22 and a front wheel clamp mechanism 23, and the front support frame 21 provides support for the front roller 22 and the front wheel clamp mechanism 23; the front rollers 22 are used for supporting the front wheels 5, one front wheel 5 is arranged corresponding to the two front rollers 22, and each two front rollers 22 are arranged on the front support frame 21 in parallel and in a front-back side-by-side mode through a bearing seat and a bearing; the front wheel clamp mechanism 23 is arranged on the upper surface of the front support frame 21 and used for positioning the front wheel 5; the front wheel 5 is arranged between the two front rollers 22; the front driving component 3 is used for driving one of the two front rollers 22 to rotate, a plurality of protruding blocks 221 are arranged on the front rollers 22 and used for simulating bumpy road conditions, and under the action of friction force, the front rollers 22 rotate to drive the front wheels 5 to rotate, so that vibration tests are carried out on a front fork, an instrument, assembly and the like of the whole vehicle.
The rear support assembly 4 is arranged corresponding to the rear test notch 112 and comprises a rear support frame 41, a rear roller 42 and a rear wheel clamp mechanism 43, and the rear support frame 41 provides support for the rear roller 42 and the rear wheel clamp mechanism 43; the rear rollers 42 are used for supporting the rear wheels 6, one rear wheel 6 is arranged corresponding to the two rear rollers 42, every two rear rollers 42 are arranged on the rear support frame 41 in parallel through a bearing seat and a bearing, and the rear wheel clamp mechanism 43 is arranged on the upper surface of the rear support frame 41 and used for positioning the rear wheels 6; the rear wheel 6 is arranged between the two rear rollers 42, the surface of one rear roller 42 of every two rear rollers 42 is provided with a plurality of convex blocks 421, and for a rear-drive vehicle, the rear wheel 6 of the whole vehicle rotates by the power of the whole vehicle, so that a vibration test is carried out. The type of bumps on the front roller 22 and the rear roller 42 can be changed as desired to simulate various real road conditions.
In this embodiment, a vibration test apparatus for testing a tricycle is taken as an example to specifically describe, the front support assembly 2 includes two front rollers 22, the two front rollers 22 correspond to front wheels 5 of the tricycle, and one front wheel 5 corresponds to a set of front wheel clamp mechanisms 23; the rear support assembly 4 comprises four rear rollers 42, one rear wheel 6 for each two rear rollers 42, and a set of rear wheel clamp mechanisms 43 for each rear wheel 6. For vehicles such as electric bicycles, automobiles and the like, the number of the front and rear rollers and the number of the front and rear clamp mechanisms of the front support assembly 2 and the rear support assembly 4 can be adaptively adjusted.
Specifically, as shown in fig. 5 and 9, the front wheel clamping mechanism 23 includes a front mounting plate 231, a front stop wheel assembly 232, two first links 233 and two second links 234, the front stop wheel assembly 232 is rotatably connected to the front mounting plate 231, and the front stop wheel assembly 232 abuts against the front wheels 5 to prevent the front wheels 5 from moving forward; two ends of the front wheel assembly 232 are respectively hinged with one end of a first connecting rod 233, the other end of the first connecting rod 233 is hinged with one end of a second connecting rod 234, and the other end of the second connecting rod 234 is connected with a wheel shaft of the front wheel 5 through a shaft 235. The influence of shaking on the front wheels 5 in the detection process can be buffered through the rotation of the parts at the hinged parts, and the front and back movement of the front wheels 5 is effectively reduced. Preferably, a plurality of mounting holes for mounting the front stop wheel assembly 232 on the front mounting plate 231, a plurality of mounting holes for connecting the front stop wheel assembly 232 on the first connecting rod 233, and a plurality of mounting holes for mounting the axle 235 on the second connecting rod 234 are provided, so as to adapt to different specifications of finished vehicles.
To facilitate mounting and adjusting the front-rear position of the front wheel clamp mechanism 23, the front wheel clamp mechanism 23 further includes a front fixing plate 236 and a guide slide member configured such that the front mounting plate 231 can move forward and backward on the front fixing plate 236. Specifically, the upper surface of the front fixing plate 236 is provided with a slider, and the lower surface of the front mounting plate 231 is provided with a slide rail. The lower end of the front fixing plate 236 is welded to the upper surface of the front support frame 21, and the upper surface of the front fixing plate 236 is slidably coupled to the lower surface of the front mounting plate 231. The guiding sliding component can be a screw rod and screw rod nut transmission structure, the screw rod is arranged on the front fixing plate 236, the screw rod nut is connected with the front mounting plate 231, the screw rod is driven by a motor or driven by hand to rotate, so that the screw rod nut and the front mounting plate 231 move back and forth, and in the embodiment, manual driving is selected; the guiding sliding component can also be a gear and rack transmission structure, the gear is arranged on the front fixing plate 236, the rack is connected with the front mounting plate 231, and the gear is driven by a motor or manually to drive the gear to rotate, so that the rack and the front mounting plate 231 move back and forth.
Preferably, the front drive assembly 3 comprises an electric motor and a belt drive connected to each other, the belt drive being connected to one of the two front rollers 22. The belt drive may also be replaced by a chain drive, a gear drive or the like. As shown in fig. 3 and 6, the front roller 22 connected to the belt transmission device is provided with a plurality of convex blocks 221.
As shown in fig. 2 and 10, the rear wheel clamp mechanism 43 includes a rear mounting plate 431 and a rear catch wheel assembly 432, the rear catch wheel assembly 432 is rotatably connected to the rear mounting plate 431, and the rear catch wheel assembly 432 abuts against the rear wheel 6 to prevent the rear wheel 6 from moving rearward. The rear mounting plate 431 may be provided with a plurality of mounting holes for mounting the rear catch wheel assembly 432 for accommodating entire vehicles of different specifications. As shown in fig. 4, the rear wheel clamp mechanism 43 further includes a rear fixing plate 433 and a guide slide member configured such that the rear mounting plate 431 can move back and forth on the rear fixing plate 433. Specifically, the upper surface of the rear fixing plate 433 is provided with a sliding block, and the lower surface of the rear mounting plate 431 is provided with a sliding rail. The lower end of the rear fixing plate 433 is welded to the upper surface of the rear support frame 41, and the upper surface of the rear fixing plate 433 is slidably connected to the lower surface of the rear mounting plate 431. The guide sliding component can be a screw rod and screw rod nut transmission structure, the screw rod is arranged on the rear fixing plate 433, the screw rod nut is connected with the rear mounting plate 431, and the screw rod is driven by a motor or manually driven to rotate, so that the screw rod nut together with the rear mounting plate 431 moves back and forth; the guiding sliding component can also be a gear and rack transmission structure, a gear is arranged on the rear fixing plate 433, a rack is connected with the rear mounting plate 431, and the rack is driven by a motor or manually driven to rotate so that the rack together with the rear mounting plate 431 moves back and forth.
In order to facilitate the adjustment of the front support frame 21 and/or the rear support frame 41 to move forward and backward, as shown in fig. 7 and 8, a guide sliding part is arranged between the front support frame 21 and/or the rear support frame 41 and the main support frame 1. The main support frame 1 is provided with a slide rail 12, the front support frame 21 and/or the rear support frame 41 is provided with a slide block 211, and the main support frame 1 is connected with the front support frame 21 and/or the rear support frame 41 in a sliding manner. Taking the main support frame 1 and the front support frame 21 as an example, the guiding sliding part can be a screw rod and screw nut transmission structure, the screw rod is arranged on the main support frame 1, the screw rod nut is connected with the front support frame 21, and the screw rod is driven by a motor or manually driven to rotate, so that the screw rod nut and the front support frame 21 are driven to move back and forth; the guide sliding component can also be a gear and rack transmission structure, the gear is arranged on the main support frame 1, the rack is connected with the front support frame 21, and the gear is driven by a motor or manually to drive the gear to rotate, so that the rack together with the front support frame 21 moves back and forth.
The working principle of the embodiment is as follows: the front wheel 5 of the rear-drive type tricycle is arranged between the two front rollers 22, and the rear wheel 6 is respectively arranged between the two corresponding rear rollers 42; adjusting a guide sliding component of the front wheel clamp mechanism 23 to drive the front mounting plate 231 to move backwards, so that the front stop wheel component 232 is abutted against the front wheel 5, and the second connecting rod 234 is connected with a wheel shaft of the front wheel 5 through a shaft 235; adjusting the rear wheel clamp mechanism 43 to drive the rear mounting plate 431 to move forward, so that the rear catch wheel assembly 432 is abutted against the rear wheel 6; the front driving component 3 is started to drive the front roller 22 to rotate, and the front roller 22 drives the front wheel 5 to rotate under the action of friction force; the power of the whole vehicle is started to drive the two rear wheels 6 to rotate, the rear wheels 6 drive the rear roller 42 to rotate under the action of friction force, and the protruding blocks 221 arranged on the front roller 22 and the rear roller 42 can simulate bumpy road conditions so as to carry out vibration detection.
To forerunner's type vehicle, can locate the rear through setting up the forerunner drive assembly in this application and drive rear drum, rear wheel and rotate, and the front wheel relies on the power of whole car self to rotate, and this kind of adaptability changes the whole car vibration test device structure test forerunner's type vehicle also can.
The whole vehicle vibration test device provided by the embodiment has a double-roller structure which is parallel to wheels and is arranged in parallel front and back, and the wheels are arranged between the two rollers; when the wheels tend to shift forwards, the rollers on the front side have a blocking effect on the wheels, and when the wheels tend to shift backwards, the rollers on the rear side have a blocking effect on the wheels, so that the wheels are more stably contacted with the two rollers, and the front-back shift amount of the wheels can be effectively reduced; a front stop wheel component in the front wheel clamp mechanism is abutted against the front wheel and has a thrust function; the second connecting rod is connected with a wheel shaft of the front wheel through a shaft, the second connecting rod is hinged with the first connecting rod, the first connecting rod is hinged with the front stop wheel assembly, and the influence of shaking on the front wheel in the detection process can be buffered through the rotation of parts at the hinged parts, so that the front and back movement of the front wheel is effectively reduced; a rear catch wheel component in the rear wheel clamp mechanism is abutted against the rear wheel and has a catch function; the front wheel and the rear wheel of the embodiment are good in positioning performance, the front and rear movement of the whole vehicle in detection is effectively reduced, and the detection efficiency is improved.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (10)
1. The utility model provides a whole car vibration test device, includes the main tributary strut, the top of main tributary strut is equipped with test platform, test notch and back test notch before being equipped with on the test platform, its characterized in that still includes:
the front support assembly is arranged corresponding to the position of the front test notch, is used for providing support for front wheels of the whole vehicle, and comprises a front support frame, front rollers and a front wheel clamp mechanism, wherein one front wheel is arranged corresponding to two front rollers, each two front rollers are arranged on the front support frame in parallel and in a front-back side-by-side mode, and the front wheel clamp mechanism is arranged on the upper surface of the front support frame;
the front driving assembly is used for driving one of the two front rollers to rotate;
rear support assembly, rear support assembly corresponds the setting of back test breach position for the rear wheel of whole car provides the support, including rear support frame, rear drum and rear wheel anchor clamps mechanism, one the rear wheel corresponds two the rear drum sets up, per two the parallel front and back side by side of rear drum is located on the rear support frame, rear wheel anchor clamps mechanism locates the rear support frame upper surface.
2. The vehicle vibration test device according to claim 1, characterized in that: the front wheel clamp mechanism comprises a front mounting plate, a front baffle assembly, two first connecting rods and two second connecting rods, the front baffle assembly is rotatably connected with the front mounting plate and is abutted against the front wheels, two ends of the front baffle assembly are respectively hinged with one end of each first connecting rod, the other end of each first connecting rod is hinged with one end of each second connecting rod, and the other end of each second connecting rod is connected with a wheel shaft of the front wheel through a shaft.
3. The vehicle vibration test device according to claim 2, characterized in that: the front wheel clamp mechanism further comprises a front fixed plate and a guide sliding component, wherein the guide sliding component is configured to enable the front mounting plate to move back and forth on the front fixed plate.
4. The vehicle vibration test device according to claim 1, characterized in that: the front driving assembly comprises a motor and a belt transmission device which are connected with each other, and the belt transmission device is connected with one of the two front rollers.
5. The vehicle vibration test device according to claim 4, wherein: the front roller connected with the belt transmission device is provided with a plurality of convex blocks.
6. The vehicle vibration test device according to claim 1, characterized in that: the rear wheel clamp mechanism comprises a rear mounting plate and a rear catch wheel assembly, the rear catch wheel assembly is rotatably connected with the rear mounting plate, and the rear catch wheel assembly is in contact with the rear wheel in a propping mode.
7. The vehicle vibration test device according to claim 6, wherein: the rear wheel clamp mechanism further comprises a rear fixed plate and a guide sliding member configured such that the rear mounting plate can move back and forth on the rear fixed plate.
8. The vehicle vibration test device according to claim 1, characterized in that: and a plurality of convex blocks are arranged on the surface of one of every two rear rollers.
9. The vehicle vibration test device according to claim 1, characterized in that: and a guide sliding component is arranged between the front support frame and/or the rear support frame and the main support frame.
10. The vehicle vibration test device according to claim 1, characterized in that: the front supporting assembly comprises two front rollers, the two front rollers correspond to one front wheel, the rear supporting assembly comprises four rear rollers, and every two rear rollers correspond to one rear wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920489473.0U CN209910930U (en) | 2019-04-12 | 2019-04-12 | Whole car vibration test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920489473.0U CN209910930U (en) | 2019-04-12 | 2019-04-12 | Whole car vibration test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209910930U true CN209910930U (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920489473.0U Expired - Fee Related CN209910930U (en) | 2019-04-12 | 2019-04-12 | Whole car vibration test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN209910930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112265A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Automobile vibration testing device capable of switching testing shafts |
| CN115719556A (en) * | 2022-12-16 | 2023-02-28 | 扬州工业职业技术学院 | Automotive suspension multiplex condition analogue means |
-
2019
- 2019-04-12 CN CN201920489473.0U patent/CN209910930U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112265A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Automobile vibration testing device capable of switching testing shafts |
| CN114112265B (en) * | 2021-11-19 | 2023-08-18 | 西安航空学院 | Automobile vibration testing device capable of switching testing shafts |
| CN115719556A (en) * | 2022-12-16 | 2023-02-28 | 扬州工业职业技术学院 | Automotive suspension multiplex condition analogue means |
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