CN113820001B - Experimental device for be used for testing windscreen wiper and wind window friction vibration noise - Google Patents
Experimental device for be used for testing windscreen wiper and wind window friction vibration noise Download PDFInfo
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- CN113820001B CN113820001B CN202111184470.4A CN202111184470A CN113820001B CN 113820001 B CN113820001 B CN 113820001B CN 202111184470 A CN202111184470 A CN 202111184470A CN 113820001 B CN113820001 B CN 113820001B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention relates to an experimental device for testing friction vibration noise of a windscreen wiper and a windshield. The device comprises an experiment table, a cross driving part, a unidirectional force sensor and a wiper assembly; the experiment table is internally provided with windshield glass, the cross driving part is arranged on the experiment table, and the movable ends of the cross driving part can move longitudinally and transversely respectively; one end of the wiper assembly is arranged on the movable end of the cross driving part through two unidirectional force sensors, one unidirectional force sensor is arranged along the longitudinal direction, and the other unidirectional force sensor is arranged along the transverse direction. Above-mentioned experimental apparatus for testing windscreen wiper and windshield friction vibration noise connects cross drive part and windscreen wiper assembly through two unidirectional force sensors that mutually perpendicular set up, and this experimental apparatus can reciprocating motion simulate out the running state of windscreen wiper doctor-bar on the actual vehicle to can apply not equidimension power to windscreen glass, thereby measure respectively and scrape normal force and frictional force of brush in-process doctor-bar to glass, it is more accurate to measure.
Description
Technical Field
The invention relates to the field of automobile testing, in particular to an experimental device for testing friction vibration noise of a windscreen wiper and a windshield.
Background
The automobile windscreen wiper and the windscreen are important parts of the automobile, the windscreen is positioned at the front part of the automobile, the windscreen wiper is used for removing rain, snow, dust, soil and other dirt on the windscreen, the outer surface of the windscreen can be kept clean, the sight of a driver is clear, and the accident probability is reduced.
Because of the harsh operating environment of wiper systems, the requirements for comfort, reliability and safety are very high, with noise from the wiper being of particular concern. The wiper friction noise includes three types of squeal noise (about 1000 Hz), chatter noise (about 100Hz or less) and reverse noise (about 500Hz or less), which are respectively associated with high-frequency and low-frequency vibrations of the wiper system and impact vibrations generated when the wiper blade is reversed.
The experiment is a basic method for researching the friction vibration noise of the windscreen wiper and the windshield, and is helpful for knowing the appearance characteristics of the noise. The traditional experiment platform can be divided into a real vehicle experiment and a bench experiment, and because the gap between the wiper and the wiper arm in the real vehicle is relatively fixed, the friction force and the vertical pressure are measured by measuring instruments such as a force sensor and the like to obtain the friction coefficient, so that the conversion process from wetting to semi-wetting to drying of the glass surface is represented, and the bench is adopted in the experiment. In order to better simulate the running state of a wiper on a real vehicle, a pressure regulating component is required to be installed on the wiper blade to simulate the static pressure distribution of the wiper blade on the real vehicle to each point of glass, so that an accelerometer and a microphone are arranged, and the measured value can be better close to the value on the real vehicle. The traditional bench test device is difficult to add a force sensor between the wiper brush and the wiper arm, and cannot be suitable for most automobiles on the market, and meanwhile, because the pressure of each position between the wiper strip and the glass is different, the measured value and the actual result may have larger difference.
Disclosure of Invention
Based on this, it is necessary to be difficult to add a force sensor between a wiper brush and a wiper arm for a conventional wiper and windshield frictional vibration noise experimental device, and most of automobiles on the market cannot be adapted, and meanwhile, because the magnitudes of the pressures at various positions between a wiper strip and glass are not the same, the measured values and the actual results may have a large difference, and an experimental device for testing the wiper and windshield frictional vibration noise, which is capable of setting a force sensor between a wiper brush and a wiper arm and measuring the values more accurately, is provided.
An experimental device for testing friction vibration noise of a windscreen wiper and a windshield comprises an experimental table, a cross driving part, a unidirectional force sensor and a windscreen wiper assembly;
the experiment table is internally provided with windshield glass, the cross driving part is arranged on the experiment table, and the movable end of the cross driving part can move longitudinally and transversely respectively; one end of the wiper assembly is arranged on the movable end of the cross driving part through two unidirectional force sensors, one unidirectional force sensor is arranged along the longitudinal direction, the other unidirectional force sensor is arranged along the transverse direction, and the two unidirectional force sensors are connected with one end which is empty; the other end of the wiper assembly is abutted against the windshield glass.
Further, the wiper assembly comprises a mounting frame, a pressure adjusting part and a wiper blade;
the mounting frame is arranged at one end of the unidirectional force sensor, springs are arranged in the pressure regulating parts, the pressure regulating parts are fixed on the mounting frame at intervals, the scraping blade is arranged at the lower end of the mounting frame, one end of the scraping blade is abutted against the springs in the pressure regulating parts, a sheet type pressure sensor is respectively arranged between each spring and the scraping blade, and the other end of the scraping blade is abutted against the windshield glass.
Further, the pressure regulating component comprises a sleeve, a bolt and the spring;
the sleeve is fixed on the mounting frame, the spring is positioned in the sleeve, and the bolt penetrates through the top end of the sleeve and is in threaded connection with the sleeve; one end of the spring is abutted against the bolt, and the other end of the spring is abutted against the scraping blade through the elastic metal sheet.
Further, a nut is screwed on the portion, located outside the sleeve, of the bolt.
Further, the tightening rotation direction of the bolt and the nut is opposite.
Furthermore, one empty end of the two unidirectional force sensors is connected through an L-shaped connecting plate, and one ends of the two unidirectional force sensors are respectively and vertically fixed on two edges of the L-shaped connecting plate.
Further, the cross driving part comprises a transverse ball screw and a longitudinal ball screw;
the transverse ball screw is fixed on the test bed through a supporting seat, sliding guide rails are arranged in the transverse ball screw and the longitudinal ball screw, and sliding blocks are arranged on the two sliding guide rails; one end of the transverse ball screw is provided with a motor for driving the inner slide block to move along the sliding guide rail, and one end of the longitudinal ball screw is provided with a rocker for driving the inner slide block to move along the sliding guide rail;
the longitudinal ball screw is fixed on a sliding block of the transverse ball screw, and the longitudinal ball screw and the sliding block form a cross moving mechanism; and the empty end of one-way force sensor is connected with a sliding block in the longitudinal ball screw.
Further, a drag chain is paved on the transverse ball screw, and one end of the drag chain is fixed on the longitudinal ball screw and bent to form a U-shaped structure.
Further, the device also comprises a humidifying component, wherein the humidifying component comprises a spray head and a diaphragm pump; the spray head is fixed on the longitudinal ball screw, the opening of the spray head faces downwards, the spray head is connected with the diaphragm pump through a water pipe, the water pipe is distributed along the drag chain, and the diaphragm pump is also communicated with the water tank.
Further, a drainage groove is formed in the experiment table and is located on the outer ring of the windshield glass.
Above-mentioned experimental apparatus for testing windscreen wiper and windshield friction vibration noise connects cross drive part and windscreen wiper assembly through two unidirectional force sensors that mutually perpendicular set up, and this experimental apparatus can reciprocating motion simulate out the running state of windscreen wiper doctor-bar on the actual vehicle to can apply not equidimension power to windscreen glass, thereby measure respectively and scrape normal force and frictional force of brush in-process doctor-bar to glass, it is more accurate to measure.
Drawings
FIG. 1 is a schematic perspective view of an experimental apparatus;
FIG. 2 is a schematic view of a partial structure of an experimental device;
FIG. 3 is a schematic perspective view of a wiper assembly;
fig. 4 is a schematic structural view of the pressure regulating member.
In the figure: 100. a cross drive member; 110. a transverse ball screw; 111. a motor; 112. a support base; 120. a longitudinal ball screw; 121. a rocker; 200. an experiment table; 210. a drainage channel; 220. an air spring seat; 300. a detection section; 310. a unidirectional force sensor; 320. an L-shaped connecting plate; 400. a wiper assembly; 410. a mounting frame; 420. a pressure adjusting part; 421. a sleeve; 422. a spring; 423. a bolt; 424. a nut; 430. a wiper blade; 440. an elastic metal sheet; 500. a humidifying member; 510. a drag chain; 60. a windshield.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, in one embodiment, an experimental apparatus for testing a wiper and a windshield frictional vibration noise includes an experiment table 200, a cross drive part 100, a unidirectional force sensor 310, and a wiper assembly 400; the experiment table 200 is internally provided with a windshield 60, the cross driving part 100 is arranged on the experiment table 200, and the movable ends of the cross driving part can move longitudinally and transversely respectively; one end of the wiper assembly 400 is mounted on the movable end of the cross drive component 100 through two unidirectional force sensors 310, one unidirectional force sensor 310 is arranged along the longitudinal direction, the other unidirectional force sensor 310 is arranged along the transverse direction, and one free end of the unidirectional force sensor 310 is connected with the other free end of the unidirectional force sensor 310; the other end of the wiper assembly 400 abuts the windshield 60. Wherein a plurality of air spring seats 220 are installed below the experiment table 200 for support.
The cross driving component 100 may drive the wiper assembly 400 to move along the normal line of the windshield 60, so that the wiper 430 abuts against the windshield 60, the longitudinally disposed unidirectional force sensor 310 may detect the abutting pressure, and then the cross driving component 100 drives the wiper to move along the surface of the windshield 60, and the laterally disposed unidirectional force sensor 310 may detect the frictional force.
The experimental device for testing the friction vibration noise of the windshield wiper and the windshield wiper connects the cross driving component 100 and the windshield wiper assembly 400 through the two unidirectional force sensors 310 which are mutually perpendicular, and the experimental device can simulate the running state of the windshield wiper 430 on an actual vehicle by reciprocating motion and can apply different forces to the windshield glass 60, so that the normal force and the friction force of the windshield wiper 430 to the glass in the wiping process are respectively measured, and the measurement is more accurate.
As shown in fig. 3 and 4, in the present embodiment, the wiper assembly 400 includes a mounting frame 410, a pressure adjusting part 420, and a wiper blade 430; the mounting frame 410 is mounted at one end of a unidirectional force sensor 310 which is empty, springs 422 are arranged in the pressure regulating parts 420, a plurality of pressure regulating parts 420 are fixed on the mounting frame 410 at intervals, the scraping blade 430 is mounted at the lower end of the mounting frame 410, one end of the scraping blade is abutted against the springs 422 in the plurality of pressure regulating parts 420, a sheet-type pressure sensor is respectively arranged between each spring 422 and the scraping blade 430, and the other end of each spring is abutted against the windshield 60.
The free end refers to an end which is not connected with other parts.
The wiper assembly 400 is provided with the sheet-type pressure sensor between each spring 422 and the wiper 430, so that the experimental device can detect the pressure of each point on the wiper 430, and the detection accuracy is high and more accurate.
In the wiper assembly 400, the plurality of sleeves 421 are arranged at intervals, and the springs 422 are arranged in the sleeves 421 and used for pressing the wiper 430 under the plurality of sleeves 421, so that the wiper 430 is more attached to the windshield 60.
In the present embodiment, the pressure regulating member 420 includes a sleeve 421, a bolt 423, and the above-described spring 422; sleeve 421 is fixed on mounting frame 410, spring 422 is positioned in sleeve 421, bolt 423 penetrates the top end of sleeve 421 and is connected with sleeve 421 by screw thread; one end of the spring 422 is abutted against the bolt 423, and the other end of the spring 422 is abutted against the wiper 430 through the elastic metal sheet 440.
The elastic metal sheet 440 may be a steel sheet or an elastic metal alloy.
In the wiper assembly 400, the elastic metal sheet 440 is disposed between the wiper blade 430 and the spring 422, and when the bolt 423 is rotated, the spring 422 is pushed to deform, so that the wiper blade 430 fixedly connected with the elastic metal sheet 440 deforms slightly, and the static pressure distribution of the wiper blade 430 to a plurality of points on the windshield 60 is adjusted.
In the present embodiment, a nut 424 is screwed to a portion of the bolt 423 located outside the sleeve 421. The tightening rotation directions of the bolt 423 and the nut 424 are opposite. The bolt 423 is more stable to fix, and the condition of rotation loosening can not be generated.
In this embodiment, one end of the two unidirectional force sensors 310, which are empty, is connected through an L-shaped connection plate 320, and one ends of the two unidirectional force sensors 310 are respectively vertically fixed on two sides of the L-shaped connection plate 320. The two unidirectional force sensors 310 and one L-shaped connection plate 320 constitute the detection unit 300.
In the present embodiment, the cross drive member 100 includes a transverse ball screw 110 and a longitudinal ball screw 120;
the transverse ball screw 110 is fixed on the test bed through a supporting seat 112, sliding guide rails are arranged in the transverse ball screw 110 and the longitudinal ball screw 120, and sliding blocks are arranged on the two sliding guide rails; one end of the transverse ball screw 110 is provided with a motor 111 for driving the sliding block in the transverse ball screw to move along the sliding guide rail, and one end of the longitudinal ball screw 120 is provided with a rocker 121 for driving the sliding block in the longitudinal ball screw to move along the sliding guide rail; the longitudinal ball screw 120 is fixed on the slide block of the transverse ball screw 110, and the two form a cross moving mechanism; the free end of one-way force sensor 310 is connected to a slider within longitudinal ball screw 120.
In this embodiment, a drag chain 510 is laid on the lateral ball screw 110, and one end of the drag chain 510 is fixed to the longitudinal ball screw 120 and bent to form a U-shaped structure.
In this embodiment, the experimental apparatus further includes a humidifying part 500, and the humidifying part 500 includes a spray head and a diaphragm pump; the spray head is fixed on the longitudinal ball screw 120 with the opening facing downwards, and is connected with a diaphragm pump through a water pipe which is arranged along the drag chain 510, and the diaphragm pump is also communicated with the water tank.
The above experimental apparatus connects the transverse ball screw 110 and the longitudinal ball screw 120 by using the drag chain 510, and bends the drag chain 510 into a U-shaped structure, and the water pipes are arranged along the drag chain 510, so that the water pipes of the humidifying part 500 do not bend to affect the humidification of the windshield 60, and are arranged more regularly.
In this embodiment, the test bench 200 is provided with a drain groove 210, and the drain groove 210 is located at the outer periphery of the windshield 60.
When the experimental device is used, the controller outputs a positioning instruction and a pulse signal to the servo driver, wherein the pulse signal comprises a pulse frequency for controlling the speed, a pulse quantity for controlling the distance and a running direction, the servo driver drives the motor 111, the motor 111 feeds back position and speed signals to the encoder, and the encoder reads and corrects the signals and transmits the signals back to the servo driver, so that a closed loop is formed in the whole process.
After the servo motor 111 is electrified, the screw rod in the transverse ball screw 110 is driven to rotate, so that the sliding block can only do horizontal reciprocating motion; the longitudinal ball screw 120 externally connected drives the unidirectional force sensor 310, the wiper assembly 400 and other components to do horizontal reciprocating motion; by adjusting the rotary rocker 121, the wiper 430 can be attached to the windshield 60 fixed to the base of the laboratory bench 200 with a certain pressure, and the horizontal reciprocating motion can simulate the running state of the wiper 430 on an actual vehicle.
The pressure regulating part 420 takes the spring 422 as a damping element to ensure that the elastic metal sheet 440 is not permanently deformed due to large displacement when the bolt 423 moves downwards, and the purpose of fine adjustment of pressure can be achieved; tightening nut 424 achieves the goal of maintaining the pressure at each point while the mechanism is in operation.
The water pipe is externally connected with the diaphragm pump and the water tank, and the voltage of the diaphragm pump is adjusted to change the water pressure, so that the flow is changed, and different rainfall intensities during running can be simulated; the drag chain 510 is hinged by the chain blocks and rotates along the center of the hinge hole within a certain angle range, so that the drag chain can move along with the movement of the vertical longitudinal ball screw 120 to drive the water pipe to move, and continuously spray water while scraping back and forth on the whole windshield 60.
Before experimental tests are carried out on the experimental device, the thin-sheet (or film type static) pressure sensors are arranged in an array under the springs 422, a plurality of distribution points are shared, the rotating rocker 121 loads pressure on the windshield glass 60 through the wiper 430, and the value of the pressure to be tested is displayed by the unidirectional force sensor 310 in the vertical direction through a connected computer; the pressure data of each point detected by the experimental device are detected and displayed through each sheet-type pressure sensor, and the pressure distribution represents the pressure exerted on the wiper 430 in units of N/m; the pressure distribution data are also measured once on a real vehicle, and then two groups of data are compared after being mapped on a computer by using matlab (matrix factory, matrix Laboratory) in a pressure distribution mode; the pressure at each point is fine-tuned by rotating the bolts 423 and adjusted to the data closest to the real vehicle, and the sensor is removed and calibrated.
During testing, the motor 111 runs at different rotation speeds (the running speed of the transverse ball screw 110 is not more than 1250 mm/s), the rotary rocker 121 adjusts different pressure values (the pressure value range of a common wiper strip per unit length is 15N/m-25N/m, namely the pressure value range of the measured pressure is 1.8N-3N), the different pressure values can be displayed by a computer through the unidirectional force sensor 310 in the vertical direction, the indoor environment temperature is adjustable between 16 ℃ and 30 ℃, the glass surface is tested in a dry, semi-wet and wet state (the three working conditions are distinguished by the sizes of friction coefficients, the friction coefficients are measured by the unidirectional force sensor 310 to measure the horizontal and vertical forces, and the curve of the force change along with time is drawn through the computer to calculate the curve of the friction coefficient change along with time). The accelerometers are arranged on the wiper blade 430 and on the lower surface of the windshield 60, the microphones are arranged at positions when the wiper blade 430 is reversed, signals are collected through the LMS SCM05 and transmitted into a computer, and the influences on vibration and noise when the wiper is reversed under different wiping speeds, pressures and temperatures are measured.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. The experimental device for testing friction vibration noise of the windscreen wiper and the windshield is characterized by comprising an experimental bench, a cross driving part, a unidirectional force sensor and a windscreen wiper assembly;
the experiment table is internally provided with windshield glass, the cross driving part is arranged on the experiment table, and the movable end of the cross driving part can move longitudinally and transversely respectively; one end of the wiper assembly is arranged on the movable end of the cross driving part through two unidirectional force sensors, one unidirectional force sensor is arranged longitudinally, the other unidirectional force sensor is arranged transversely, the two unidirectional force sensors are connected at the vacant end, and the vacant end is the end which is not connected with other parts; the other end of the wiper assembly is abutted against the windshield glass; one empty ends of the two unidirectional force sensors are connected through an L-shaped connecting plate, and one ends of the two unidirectional force sensors are respectively and vertically fixed on two edges of the L-shaped connecting plate;
the wiper assembly comprises a mounting frame, a pressure adjusting part and a wiper blade;
the mounting frame is arranged at one empty end of the unidirectional force sensor, springs are arranged in the pressure regulating parts, the pressure regulating parts are fixed on the mounting frame at intervals, the scraping blade is arranged at the lower end of the mounting frame, one end of the scraping blade is in contact with the springs in the pressure regulating parts, a sheet-type pressure sensor is respectively arranged between each spring and the scraping blade, and the other end of the scraping blade is in contact with the windshield glass;
the pressure regulating component comprises a sleeve, a bolt and the spring;
the sleeve is fixed on the mounting frame, the spring is positioned in the sleeve, and the bolt penetrates through the top end of the sleeve and is in threaded connection with the sleeve; one end of the spring is abutted against the bolt, and the other end of the spring is abutted against the scraping blade through the elastic metal sheet.
2. The experimental device for testing friction vibration noise of a wiper and a windshield according to claim 1, wherein a nut is screwed to a portion of the bolt located outside the sleeve.
3. The experimental device for testing the friction vibration noise of a wiper and a windshield according to claim 2, wherein the fastening rotation directions of the bolt and the nut are opposite.
4. The experimental set-up for testing the friction vibration noise of a wiper and a windshield according to claim 1, wherein the cross drive component comprises a transverse ball screw and a longitudinal ball screw;
the transverse ball screw is fixed on the test bed through a supporting seat, sliding guide rails are arranged in the transverse ball screw and the longitudinal ball screw, and sliding blocks are arranged on the two sliding guide rails; one end of the transverse ball screw is provided with a motor for driving the inner slide block to move along the sliding guide rail, and one end of the longitudinal ball screw is provided with a rocker for driving the inner slide block to move along the sliding guide rail;
the longitudinal ball screw is fixed on a sliding block of the transverse ball screw, and the longitudinal ball screw and the sliding block form a cross moving mechanism; and the empty end of one-way force sensor is connected with a sliding block in the longitudinal ball screw.
5. The experimental device for testing friction vibration noise of a wiper and a windshield according to claim 4, wherein a drag chain is laid on the transverse ball screw, and one end of the drag chain is fixed on the longitudinal ball screw and bent to form a U-shaped structure.
6. The experimental set-up for testing the frictional vibration noise of a wiper and a windshield of claim 5, further comprising a humidifying component comprising a spray head and a diaphragm pump; the spray head is fixed on the longitudinal ball screw, the opening of the spray head faces downwards, the spray head is connected with the diaphragm pump through a water pipe, the water pipe is distributed along the drag chain, and the diaphragm pump is also communicated with the water tank.
7. The experimental device for testing friction vibration noise of a windscreen wiper and a windshield according to claim 1, wherein a drainage groove is formed in the experimental table and is located on the outer ring of the windshield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111184470.4A CN113820001B (en) | 2021-10-12 | 2021-10-12 | Experimental device for be used for testing windscreen wiper and wind window friction vibration noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111184470.4A CN113820001B (en) | 2021-10-12 | 2021-10-12 | Experimental device for be used for testing windscreen wiper and wind window friction vibration noise |
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| Publication Number | Publication Date |
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| CN113820001A CN113820001A (en) | 2021-12-21 |
| CN113820001B true CN113820001B (en) | 2023-07-18 |
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| CN202111184470.4A Active CN113820001B (en) | 2021-10-12 | 2021-10-12 | Experimental device for be used for testing windscreen wiper and wind window friction vibration noise |
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2021
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009154730A (en) * | 2007-12-27 | 2009-07-16 | Autonetworks Technologies Ltd | Onboard wiper device |
| CN110160784A (en) * | 2019-05-14 | 2019-08-23 | 西北工业大学 | A kind of sliding bear experiment device of adjustable eccentric |
| CN214010609U (en) * | 2020-12-09 | 2021-08-20 | 贵阳万江航空机电有限公司 | Wiper blade and glass frictional force tester |
| CN112557904A (en) * | 2020-12-28 | 2021-03-26 | 温州豪华汽车配件有限公司 | Durability test equipment for wiper motor assembly |
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