A wiper durability testing device

Abstract

The application relates to a wiper durability test device, comprising a test bin, characterized in that a simulated spraying mechanism is arranged on the test bin, the simulated spraying mechanism comprises an elevation angle adjusting assembly and a flow adjusting assembly, the elevation angle adjusting assembly comprises a spray head and shafts arranged on both sides of the spray head, the shafts are rotatably installed on the inner wall of the test bin, a driving part connected with the spray head is arranged on the test bin, and the driving part is used for driving the spray head to swing around the axis of the shafts to change the spraying elevation angle. The wiper durability test device realizes dynamic and continuous adjustment of the spraying angle in the durability test process through the arrangement of the elevation angle adjusting assembly, can simulate the dynamic change of the rainwater incidence angle in the actual driving process, overcomes the defect that the spraying angle is fixed and cannot be adjusted in the prior art, makes the test working condition closer to the real use environment, and improves the accuracy and reliability of the durability test result.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a wiper durability testing device. Background Technology

[0002] As a core active safety component ensuring clear driving visibility, the reliability of windshield wipers directly affects driving safety in complex weather conditions such as rain, snow, and dust. To ensure that windshield wipers can work normally under various complex conditions, durability tests are required before the product leaves the factory. By simulating actual use environments, repeated wiping cycle tests are conducted on the windshield wipers (including the wiper blade, wiper linkage mechanism, and wiper motor) to verify whether the product can maintain a stable wiping effect, mechanical strength, and smooth operation within the specified number of wiping cycles.

[0003] Chinese patent (application number: CN106289752A) discloses a test device for the life of train windshield wipers. This solution uses a water tank to contain and circulate lubricating fluid, which can conveniently and reliably perform wiping frequency and fatigue life tests. It is simple in structure and low in cost. However, once the spray structure in this solution is installed and fixed, its spray angle is fixed and cannot be adjusted. It can only spray the liquid onto the glass plate surface at a single fixed angle. In actual testing, if it is necessary to change the spray angle to simulate rainfall conditions under different vehicle speeds or wind directions, the installation angle can only be changed by manually disassembling and reinstalling the nozzle. The operation is extremely inconvenient and cannot be dynamically adjusted during the test, making it difficult to meet the testing requirements of continuous simulation of multiple working conditions.

[0004] In actual driving, rain doesn't always fall vertically downwards. Changes in vehicle speed, the influence of crosswinds, and natural differences in the angle of rainfall all cause rain to hit the windshield surface at different angles. When a vehicle is traveling at high speed, the oncoming airflow deflects the raindrop trajectory, resulting in a significant difference between the actual angle of impact on the windshield and static rainfall. In crosswind conditions, the rain spray trajectory can be pushed downwards or blown left or right, leading to uneven distribution of the water film on the windshield. These differences in operating conditions mean that if durability tests only use a fixed spray angle, they cannot accurately reflect the stress and wear of the wipers during actual driving, resulting in a significant discrepancy between the test results and actual performance.

[0005] Therefore, a wiper durability testing device is proposed to solve the above-mentioned technical problem that the fixed and non-adjustable spray angle makes it impossible to dynamically simulate real driving and rainfall conditions during the test. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a wiper durability testing device that features dynamically adjustable spray angle and high realism in simulating test conditions. This solves the problem that the fixed and non-adjustable spray angle makes it impossible to dynamically simulate real driving and rainfall conditions during testing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wiper durability testing device, comprising a testing chamber, wherein a simulated spraying mechanism is provided on the testing chamber;

[0008] The simulated spray mechanism includes an elevation angle adjustment component and a flow rate adjustment component;

[0009] The elevation angle adjustment assembly includes a nozzle and rotating shafts disposed on both sides of the nozzle. The rotating shafts are rotatably mounted on the inner wall of the test chamber. The test chamber is provided with a drive unit connected to the nozzle. The drive unit is used to drive the nozzle to swing around the axis of the rotating shaft to change the spray elevation angle.

[0010] Furthermore, the drive unit includes a first hinge seat mounted on the test chamber, a telescopic cylinder hinged to the first hinge seat via a hinge shaft, and a second hinge seat mounted on the nozzle, the output end of the telescopic cylinder being hinged to the second hinge seat via a hinge shaft.

[0011] Furthermore, the flow regulation component includes a flow control valve disposed on the water inlet path of the nozzle and a flow meter connected in series with the flow control valve.

[0012] Furthermore, the test chamber has a water collection tank inside, and a water outlet pipe is connected to the water collection tank. A circulating water pump is installed on the water outlet pipe, and a flow control valve is installed on the water outlet pipe. The water collection tank is located at the bottom of the test chamber, and the opening area of ​​the water collection tank covers the spray area of ​​the nozzle.

[0013] Furthermore, the water outlet pipe is connected to two first branch pipes along the water flow direction, and the water outlet ends of the two first branch pipes are connected to several second branch pipes. A corrugated telescopic hose is provided at the end of the second branch pipe away from the first branch pipe, and the end of the corrugated telescopic hose away from the second branch pipe is connected to the nozzle.

[0014] Furthermore, the first diverter tube is L-shaped, the flow meter is mounted on the first diverter tube, the test chamber is provided with a return hole, and the water collection tank is connected to a circulation pipe that communicates with the return hole.

[0015] Furthermore, a drive mechanism is provided on the test chamber, and two wiper bodies are provided inside the test chamber. The drive mechanism includes a test motor provided on the test chamber. A first connector is provided at the output end of the test motor. A second connector is hinged to one end of the first connector via a hinge shaft. A first mounting shaft is hinged to the end of the second connector away from the first connector. The first mounting shaft is connected to one of the wiper bodies.

[0016] Furthermore, the first connector is provided with a rod, and a third connector is hinged to the end of the rod away from the first connector. A fourth connector is hinged to the end of the third connector away from the rod, and a second mounting shaft is hinged to the end of the fourth connector away from the third connector. The second mounting shaft is connected to another wiper body.

[0017] The output end of the test motor is connected to a fifth connector, which is hinged to the middle or end of the rod body so that the rod body can be driven to swing by the rotation of the test motor, thereby driving the two wiper bodies to move synchronously.

[0018] Furthermore, a display and a controller are provided on one side of the test chamber, a vibration sensor is provided on the wiper body, and a noise sensor is provided on the test chamber. Both the vibration sensor and the noise sensor are electrically connected to the controller.

[0019] The controller is used to receive the wiper operation vibration signal collected by the vibration sensor and the working noise signal collected by the noise sensor, and to display the processed signals through the display.

[0020] Furthermore, the controller is electrically connected to the test motor, the drive unit, and the flow regulation component, respectively, so as to control the oscillation frequency of the wiper body, the spray elevation angle of the nozzle, and the spray flow rate through the controller.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] 1. This wiper durability testing device, by setting up an elevation angle adjustment component, allows the nozzle to be rotatably installed on the inner wall of the test chamber via a rotating shaft. A drive unit connected to the nozzle is also provided, which drives the nozzle to swing around the axis of the rotating shaft to change the spray elevation angle. This achieves dynamic and continuous adjustment of the spray angle during the durability test, overcoming the shortcomings of existing technologies where the nozzle is fixedly installed and the spray angle is not adjustable. It can simulate the dynamic changes in the rainwater incident angle caused by factors such as vehicle speed changes and crosswind interference during actual driving, making the test conditions closer to the real usage environment, thereby improving the accuracy and reliability of the durability test results.

[0023] 2. This wiper durability testing device, through the flow control valve and flow meter in the flow regulation component, achieves precise adjustment and real-time monitoring of the spray flow. In conjunction with the elevation angle adjustment component, it can adjust the spray angle and spray flow synchronously or independently during the test, thereby simulating complex rainfall conditions with different rainfall levels and different rainwater incident angles, such as light rain, moderate rain, heavy rain, and rainstorms. This significantly expands the range of conditions covered by durability testing and improves the comprehensiveness and rigor of the test.

[0024] 3. This wiper durability testing device, by installing vibration sensors on the wiper body and noise sensors on the test chamber, and electrically connecting them to the controller and display, can collect and display the operating vibration and noise signals of the wiper in real time during the durability test. This real-time monitoring data can reflect the wear status and operating smoothness trend of the wiper's mechanical components, providing testers with quantitative basis for judging whether the wiper has experienced early failure or performance degradation, facilitating timely recording of failure modes and failure times, and improving the intelligence level of the test and the scientific nature of the data analysis. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a front view of the structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection structure between the nozzle and the corrugated telescopic hose in this invention;

[0028] Figure 4 This is a schematic diagram of the connection structure between the water collection tank and the test chamber in this invention;

[0029] Figure 5 This is a schematic diagram of the connection structure between the first shunt pipe and the second shunt pipe in this invention;

[0030] Figure 6 This is a top view of the test chamber in this invention;

[0031] Figure 7 This is a schematic diagram of the connection structure of the first connector, the second connector, and the third connector in this invention;

[0032] Figure 8 This is a schematic diagram of the connection structure between the rod and the fifth connector in this invention.

[0033] In the diagram: 100, Test chamber; 200, Simulated spray mechanism; 300, Drive mechanism; 400, Wiper body; 500, Display; 600, Controller; 201, Sprayer head; 202, Rotating shaft; 203, First hinge seat; 204, Telescopic cylinder; 205, Second hinge seat; 206, Flow control valve; 207, Flow meter; 208, Water collection tank; 209, Water outlet pipe; 210, Circulating water pump; 211. 212. First diversion pipe; 213. Second diversion pipe; 214. Corrugated telescopic hose; 215. Return hole; 216. Circulation pipe; 307. Test motor; 308. First connector; 309. Second connector; 300. First mounting shaft; 301. Rod; 300. Third connector; 301. Fourth connector; 302. Second mounting shaft; 303. Fifth connector; 404. Vibration sensor; 405. Noise sensor. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1:

[0036] Please see Figure 1-3 The wiper durability testing device in this embodiment includes a test chamber 100, and a simulated spraying mechanism 200 is provided on the test chamber 100.

[0037] The simulated spray mechanism 200 includes an elevation angle adjustment component and a flow rate adjustment component;

[0038] The elevation adjustment assembly includes a nozzle 201 and rotating shafts 202 disposed on both sides of the nozzle 201. The rotating shafts 202 are rotatably mounted on the inner wall of the test chamber 100. The test chamber 100 is provided with a drive unit connected to the nozzle 201. The drive unit is used to drive the nozzle 201 to swing around the axis of the rotating shaft 202 to change the spray elevation angle.

[0039] In application, the wiper blade to be tested is fixed in a predetermined position within the test chamber 100, so that the wiper blade is in contact with the windshield surface inside the test chamber 100. Water is sprayed onto the windshield surface by the simulated spray mechanism 200 to simulate rainfall conditions. The flow rate adjustment component is used to control the water flow rate delivered to the nozzle 201 to simulate different rainfall levels. During the test, when it is necessary to change the spray elevation angle to simulate the change in the rain incident angle under actual driving conditions, the drive unit drives the nozzle 201 to rotate relative to the inner wall of the test chamber 100 around the axis of the rotating shaft 202. The nozzle 201 swings synchronously with the rotating shaft 202, thereby changing the spray elevation angle of the nozzle 201. By adjusting the swing angle of the nozzle 201 by the drive unit, the spray elevation angle can be dynamically changed during the durability test, making the test conditions closer to the real state of the dynamic change in the rain incident angle caused by changes in vehicle speed or crosswind interference during actual driving, thus improving the accuracy and reliability of the durability test results.

[0040] Specifically, the test chamber 100 is equipped with a car windshield for testing.

[0041] Example 2:

[0042] The basic content is the same as in Example 1, except that:

[0043] Please see Figure 3 In this embodiment, the driving unit includes a first hinge seat 203 provided on the test chamber 100, a telescopic cylinder 204 hinged to the first hinge seat 203 via a hinge shaft, a second hinge seat 205 provided on the nozzle 201, and the output end of the telescopic cylinder 204 hinged to the second hinge seat 205 via a hinge shaft.

[0044] In application, during durability testing, when the spray elevation angle needs to be changed, the telescopic cylinder 204 receives a control signal, and its piston rod extends or retracts. Since the cylinder body of the telescopic cylinder 204 is hinged to the test chamber 100 through the first hinge seat 203 and the hinge shaft, it forms a movable support that can swing around the hinge point. At the same time, the end of the piston rod of the telescopic cylinder 204 is hinged to the nozzle 201 through the second hinge seat 205 and the hinge shaft. When the piston rod extends or retracts, the position of the hinge point between its end and the nozzle 201 changes. Since the nozzle 201 is rotatably mounted on the inner wall of the test chamber 100 through the rotating shafts 202 on both sides, the rotational freedom of the nozzle 201 is constrained by the rotating shafts 202. Therefore, the linear extension and retraction motion of the piston rod is converted into the swinging motion of the nozzle 201 around the axis of the rotating shaft 202. By controlling the extension length of the piston rod of the telescopic cylinder 204, the swing angle of the nozzle 201 can be precisely adjusted, realizing the dynamic change of the spray elevation angle.

[0045] Example 3:

[0046] The basic content is the same as in Example 1, except that:

[0047] Please see Figure 4-6 In this embodiment, the flow regulation component includes a flow control valve 206 disposed on the water inlet path of the nozzle 201 and a flow meter 207 connected in series with the flow control valve 206.

[0048] The test chamber 100 has a water collection tank 208 inside, and a water outlet pipe 209 is connected to the water collection tank 208. A circulating water pump 210 is installed on the water outlet pipe 209, and a flow control valve 206 is installed on the water outlet pipe 209. The water collection tank 208 is located at the bottom of the test chamber 100, and the opening area of ​​the water collection tank 208 covers the spray area of ​​the nozzle 201.

[0049] The water outlet pipe 209 is connected to two first branch pipes 211 along the direction of water flow. The water outlet ends of the two first branch pipes 211 are connected to several second branch pipes 212. A corrugated telescopic hose 213 is provided at the end of the second branch pipe 212 away from the first branch pipe 211. The end of the corrugated telescopic hose 213 away from the second branch pipe 212 is connected to the nozzle 201.

[0050] The first diversion pipe 211 is L-shaped, the flow meter 207 is mounted on the first diversion pipe 211, the test chamber 100 is provided with a return hole 214, and the water collection tank 208 is connected to a circulation pipe 215 that is connected to the return hole 214.

[0051] In application, before the durability test begins, sufficient test water is injected into the water collection tank 208. During the test, the circulating water pump 210 is started, pumping the water in the water collection tank 208 through the outlet pipe 209 to the first diversion pipe 211. After the water flows through the first diversion pipe 211, it enters each of the second diversion pipes 212, and then is delivered to the nozzle 201 through the corrugated telescopic hose 213. The nozzle 201 sprays water onto the windshield surface. The flow meter 207 displays the water flow rate through the pipeline in real time. The water flow rate delivered to the nozzle 201 can be changed by adjusting the opening of the flow control valve 206, thereby simulating rainfall conditions of different rainfall levels.

[0052] During the spraying process, the water that falls onto the windshield surface flows downwards into the water collection tank 208 at the bottom of the test chamber 100 under the action of gravity. Since the opening area of ​​the water collection tank 208 covers the spraying water area of ​​the nozzle 201, it can effectively collect the water flow that falls back from the spray. The water collected in the water collection tank 208 achieves water level balance and overflow control through the circulation pipe 215 and the return hole 214. Excess water can be returned or discharged through the circulation pipe 215. After natural sedimentation, the water in the water collection tank 208 is pumped back into the outlet pipe 209 by the circulation water pump 210 to realize the recycling of test water.

[0053] Furthermore, when the nozzle 201 swings under the drive of the elevation adjustment component to change the spray elevation angle, the corrugated telescopic hose 213 connected between the second diversion pipe 212 and the nozzle 201 can adaptively expand, contract, and bend with the displacement of the nozzle 201, effectively compensating for the relative displacement between the nozzle 201 and the fixed pipeline, ensuring that the nozzle 201 can maintain reliable connection with the water supply pipeline at any elevation angle position, avoiding the problem of loose joints or water supply interruption caused by pipeline pulling, and ensuring the water supply stability of the spray system during dynamic elevation angle adjustment.

[0054] Example 4:

[0055] The basic content is the same as in Example 1, except that:

[0056] Please see Figure 4 and Figure 7-8 In this embodiment, a drive mechanism 300 is provided on the test chamber 100. Two wiper bodies 400 are provided inside the test chamber 100. The drive mechanism 300 includes a test motor 301 provided on the test chamber 100. A first connector 302 is provided at the output end of the test motor 301. A second connector 303 is hinged to one end of the first connector 302 through a hinge shaft. A first mounting shaft 304 is hinged to the end of the second connector 303 away from the first connector 302. The first mounting shaft 304 is connected to one of the wiper bodies 400.

[0057] A rod 305 is provided on the first connector 302. A third connector 306 is hinged to the end of the rod 305 away from the first connector 302. A fourth connector 307 is hinged to the end of the third connector 306 away from the rod 305. A second mounting shaft 308 is hinged to the end of the fourth connector 307 away from the third connector 306. The second mounting shaft 308 is connected to another wiper body 400.

[0058] The output end of the test motor 301 is connected to a fifth connector 309, which is hinged to the middle or end of the rod 305 so that the rod 305 can swing by the rotation of the test motor 301, thereby driving the two wiper bodies 400 to move synchronously.

[0059] In application, two wiper bodies 400 to be tested are respectively mounted on the first mounting shaft 304 and the second mounting shaft 308, so that the wiper blades of each wiper body 400 are in contact with the windshield surface inside the test chamber 100. After the durability test begins, the test motor 301 is started, and its output end drives the fifth connector 309 to rotate. The rotational movement of the fifth connector 309 drives the rod 305 to swing back and forth within a predetermined angle range through its hinge point with the rod 305.

[0060] On one hand, the rod 305 drives the second connector 303 to move through the first connector 302, and the second connector 303 drives the first mounting shaft 304 to rotate around its axis, thereby driving the wiper body 400 mounted on the first mounting shaft 304 to perform reciprocating wiping action on the windshield surface; on the other hand, the rod 305 drives the third connector 306 to move through its hinge point at the end away from the first connector 302, the third connector 306 drives the fourth connector 307 to move, and the fourth connector 307 drives the second mounting shaft 308 to rotate around its axis, thereby driving another wiper body 400 mounted on the second mounting shaft 308 to perform reciprocating wiping action simultaneously.

[0061] Understandably, since both wiper bodies 400 are driven by the same test motor 301 through the same lever 305, their motion patterns are entirely determined by the swing trajectory of the lever 305. This achieves purely mechanical forced synchronization of the two wiper bodies 400 in terms of wiping frequency, wiping amplitude, and motion phase. This driving method avoids synchronization errors caused by individual motor performance differences in multi-motor independent drive schemes, and also avoids the problem of decreased synchronization accuracy caused by the accumulation of hinge gaps in multi-stage series transmission schemes. This ensures that the two wiper bodies 400 maintain high-precision synchronous operation throughout the long-term durability test, thereby improving the scientific nature and data reliability of the comparative test.

[0062] Example 5:

[0063] The basic content is the same as in Example 1, except that:

[0064] Please see Figure 1 , Figure 4 and Figure 7 In this embodiment, a display 500 and a controller 600 are provided on one side of the test chamber 100, a vibration sensor 41 is provided on the wiper body 400, and a noise sensor 42 is provided on the test chamber 100. Both the vibration sensor 41 and the noise sensor 42 are electrically connected to the controller 600.

[0065] The controller 600 is used to receive the wiper operation vibration signal collected by the vibration sensor 41 and the working noise signal collected by the noise sensor 42, and displays the processed signal through the display 500.

[0066] The controller 600 is electrically connected to the test motor 301, the drive unit, and the flow regulation component, respectively, so as to control the oscillation frequency of the wiper body 400, the spray elevation angle of the nozzle 201, and the spray flow rate through the controller 600.

[0067] In application, the tester presets a test program through the controller 600, including the wiping frequency of the wiper body 400, the range and rate of change of the spray elevation angle of the nozzle 201, the spray flow rate, and the duration and switching sequence of each working condition. After the test is started, the controller 600 sends control commands to the test motor 301 according to the preset program to adjust the speed of the test motor 301 to control the wiping frequency of the wiper body 400. At the same time, it sends control commands to the telescopic cylinder 204 of the drive unit to adjust the extension length of the piston rod to control the spray elevation angle of the nozzle 201, and sends control signals to the flow control valve 206 in the flow adjustment assembly to adjust the valve opening to control the spray flow rate. Through the centralized control of each actuator by the controller 600, the automatic switching of different wiping frequencies, different spray angles, and different spray flow rate combinations can be achieved without manual intervention.

[0068] During the test, vibration sensor 41 collects the vibration signal of wiper body 400 in real time during operation, and noise sensor 42 collects the working noise signal in test chamber 100 in real time. After the above signals are transmitted to controller 600, controller 600 processes and analyzes the signals, and displays the processed vibration amplitude, noise decibel value and corresponding number of wiping cycles in real time on display 500 in numerical or waveform form, so that test personnel can intuitively grasp the operating status of wiper. When the detected vibration amplitude or noise decibel value exceeds the preset failure judgment threshold, controller 600 automatically records the current number of wiping cycles and failure time, and can issue an alarm prompt, so that test personnel can judge in time whether wiper has reached the durability limit or has an early failure, providing an objective and quantitative judgment basis for the durability performance evaluation of wiper.

[0069] All electrical components mentioned in this article are electrically connected to the controller 600 and the power supply. The control method of this invention is controlled by the controller 600. The control circuit of the controller 600 can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this invention is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0070] In summary, the working principle of this wiper durability testing device is as follows:

[0071] After the test is started, the test motor 301 drives the rod 305 to swing back and forth within a predetermined angle range through the fifth connector 309. The swing of the rod 305 is transmitted to the first mounting shaft 304 through the first connector 302 and the second connector 303, and simultaneously transmitted to the second mounting shaft 308 through the third connector 306 and the fourth connector 307. This drives the two wiper bodies 400, which are respectively mounted on the first mounting shaft 304 and the second mounting shaft 308, to perform reciprocating wiping actions on the windshield surface in a synchronized manner, thereby realizing a simulation test of the durability performance of the wipers.

[0072] While the brushing action is in progress, the simulated spraying mechanism 200 sprays water onto the windshield surface to simulate rainfall conditions. The circulating water pump 210 transports water from the water collection tank 208 through the outlet pipe 209, the first diversion pipe 211, the second diversion pipe 212, and the corrugated telescopic hose 213 to the nozzle 201, which sprays water onto the windshield surface. The flow control valve 206 adjusts the spray flow rate to simulate different rainfall levels, and the flow meter 207 monitors the flow rate value in real time.

[0073] During the test, when it is necessary to change the spray elevation angle to simulate the change of rainwater incident angle under actual driving conditions, the piston rod of the telescopic cylinder 204 performs telescopic movements. Since the cylinder body of the telescopic cylinder 204 is hinged to the test chamber 100 through the first hinge seat 203 and the end of the piston rod is hinged to the nozzle 201 through the second hinge seat 205, the telescopic movement of the piston rod drives the nozzle 201 to swing around the axis of the rotating shaft 202, thereby dynamically changing the spray elevation angle. During the swing of the nozzle 201, the corrugated telescopic hose 213 adaptively expands and contracts to compensate for displacement, ensuring reliable connection of the water supply pipeline.

[0074] 4. During the test, vibration sensor 41 and noise sensor 42 collect the operating vibration signal and working noise signal of the wiper body 400 in real time, respectively, and transmit the signal to controller 600. After processing the signal, controller 600 displays the operating status data such as vibration amplitude and noise decibel value in real time on display 500, providing a quantitative basis for the durability performance evaluation of wiper.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A wiper durability testing device, comprising a test chamber (100), characterized in that: The test chamber (100) is equipped with a simulated spraying mechanism (200). The simulated spray mechanism (200) includes an elevation angle adjustment component and a flow rate adjustment component; The elevation angle adjustment assembly includes a nozzle (201) and a rotating shaft (202) disposed on both sides of the nozzle (201). The rotating shaft (202) is rotatably mounted on the inner wall of the test chamber (100). The test chamber (100) is provided with a drive unit connected to the nozzle (201). The drive unit is used to drive the nozzle (201) to swing around the axis of the rotating shaft (202) to change the spray elevation angle.

2. The wiper durability testing device according to claim 1, characterized in that: The drive unit includes a first hinge seat (203) provided on the test chamber (100), a telescopic cylinder (204) hinged on the first hinge seat (203) via a hinge shaft, and a second hinge seat (205) provided on the nozzle (201). The output end of the telescopic cylinder (204) is hinged to the second hinge seat (205) via a hinge shaft.

3. The wiper durability testing device according to claim 1, characterized in that: The flow regulation assembly includes a flow control valve (206) disposed on the water inlet path of the nozzle (201) and a flow meter (207) connected in series with the flow control valve (206).

4. The wiper durability testing device according to claim 3, characterized in that: The test chamber (100) has a water collection tank (208) inside, and a water outlet pipe (209) is connected to the water collection tank (208). A circulating water pump (210) is installed on the water outlet pipe (209). The flow control valve (206) is installed on the water outlet pipe (209). The water collection tank (208) is located at the bottom of the test chamber (100), and the opening area of ​​the water collection tank (208) covers the spray area of ​​the nozzle (201).

5. The wiper durability testing device according to claim 4, characterized in that: The water outlet pipe (209) is connected to two first branch pipes (211) along the water flow direction. The water outlet ends of the two first branch pipes (211) are connected to several second branch pipes (212). A corrugated telescopic hose (213) is provided at the end of the second branch pipe (212) away from the first branch pipe (211). The end of the corrugated telescopic hose (213) away from the second branch pipe (212) is connected to the nozzle (201).

6. The wiper durability testing device according to claim 5, characterized in that: The first diversion pipe (211) is L-shaped, the flow meter (207) is mounted on the first diversion pipe (211), the test chamber (100) is provided with a return hole (214), and the water collection tank (208) is connected to a circulation pipe (215) that is connected to the return hole (214).

7. The wiper durability testing device according to claim 1, characterized in that: The test chamber (100) is provided with a drive mechanism (300). The test chamber (100) is provided with two wiper bodies (400). The drive mechanism (300) includes a test motor (301) provided on the test chamber (100). The output end of the test motor (301) is provided with a first connector (302). One end of the first connector (302) is hinged to a second connector (303) through a hinge shaft. The end of the second connector (303) away from the first connector (302) is hinged to a first mounting shaft (304). The first mounting shaft (304) is connected to one of the wiper bodies (400).

8. The wiper durability testing device according to claim 7, characterized in that: The first connector (302) is provided with a rod (305), and a third connector (306) is hinged to one end of the rod (305) away from the first connector (302). A fourth connector (307) is hinged to one end of the third connector (306) away from the rod (305). A second mounting shaft (308) is hinged to one end of the fourth connector (307) away from the third connector (306). The second mounting shaft (308) is connected to another wiper body (400). The output end of the test motor (301) is connected to a fifth connector (309), which is hinged to the middle or end of the rod (305) so that the rod (305) can swing by the rotation of the test motor (301), thereby driving the two wiper bodies (400) to move synchronously.

9. The wiper durability testing device according to claim 7, characterized in that: A display (500) and a controller (600) are provided on one side of the test chamber (100). A vibration sensor (41) is provided on the wiper body (400), and a noise sensor (42) is provided on the test chamber (100). Both the vibration sensor (41) and the noise sensor (42) are electrically connected to the controller (600). The controller (600) is used to receive the wiper operation vibration signal collected by the vibration sensor (41) and the working noise signal collected by the noise sensor (42), and to display the processed signal through the display (500).

10. A wiper durability testing device according to claim 7 or 9, characterized in that: The controller (600) is electrically connected to the test motor (301), the drive unit and the flow regulating component, respectively, so as to control the swing frequency of the wiper body (400), the spray elevation angle of the nozzle (201) and the spray flow rate through the controller (600).

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