Device and method for testing durability of automobile door limiter

Abstract

The invention relates to automobile part testing, and relates to the technical field of an automobile door limiter durability testing device, and the device comprises an adjusting mechanism which comprises a first motor, a first rotating disc, a first sliding groove, a threaded rod, a first piston rod, a first sliding block, a second rotating disc, a second sliding groove and a sliding rod. Through cooperation of structures such as the second rotating disc and the arc-shaped plate, simulation testing of the vehicle door limiter is facilitated, the first motor is started to enable the second rotating disc to rotate continuously through transmission, the arc-shaped plate drives the cantilever to swing in a reciprocating mode, and the state of the limiter during door opening and closing is simulated; the durability cycle test, the motion precision verification and the instantaneous impact load evaluation of the vehicle door limiter are realized, the test automation degree and the simulation precision are improved, the negative pressure generates variable damping force, simulates air resistance, spring pre-tightening force and door closing impact, the durability of the limiter under real stress is tested, and the test effect of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile component testing, and in particular to a durability testing device and method for an automobile door stopper. Background Art

[0002] As a core tool of modern transportation, the safety and comfort of automobiles have attracted much attention. Door limiters, as key components to ensure stable opening and closing of doors and prevent accidental opening, are directly related to the life safety and user experience of drivers and passengers. As the automotive industry develops towards electrification and intelligence, traditional mechanical limiters are gradually upgraded to intelligent electric limiters with integrated sensors and motors. The complexity of functions has put higher demands on their durability. Therefore, it is crucial to test the durability of automobile door limiters.

[0003] Traditional testing devices can usually only achieve door opening and closing simulations at a single speed or fixed amplitude, and it is difficult to reproduce the stress state of real car doors in different scenarios (such as air resistance, door closing impact, spring preload, etc.), resulting in incomplete verification of key performance such as durability testing and impact load evaluation. At the same time, most swing amplitudes are fixed or complex to adjust, requiring the replacement of mechanical components, making it difficult to adapt to the differentiated travel requirements of door limiters of different models (such as sedans, SUVs, and commercial vehicles), resulting in high testing costs and low flexibility. Therefore, a durability test device for automobile door limiters is proposed. Summary of the Invention

[0004] The purpose of this application is to provide a vehicle door stopper durability testing device, including a main body mechanism and further comprising: An adjustment mechanism, the adjustment mechanism being located on a side of the main body mechanism; The adjusting mechanism includes a first motor, a first turntable, a first slide groove, a threaded rod, a first piston rod, a first slider, a second turntable, a second slide groove and a slide rod, the top of the first motor is rotatably connected to the first turntable for driving the second turntable to rotate eccentrically, the top of the first turntable is provided with a first slide groove, the first turntable is rotatably connected with a threaded rod, the inside of the first slide groove is slidably connected to the first slider, the top of the first slider is fixedly connected to the second turntable, the top of the second turntable is provided with a second slide groove for applying stress to the slide rod, the inside of the second slide groove is slidably connected to the slide rod, and the top of the slide rod is fixedly connected to the first piston rod.

[0005] Preferably, one end of the threaded rod with a thread passes through the side of the first turntable and extends to the inside of the first slide groove. The end of the threaded rod close to the first slide groove passes through the first slider and is threadedly connected to it through a thread. The shape of the first slide groove is an isosceles trapezoid, and the size of the first slider is adapted to the size of the first slide groove.

[0006] Preferably, a testing mechanism is provided inside the main body mechanism, and the testing mechanism is located on the side of the adjusting mechanism. The testing mechanism includes a testing shell, and a first cavity, an air outlet and an arc groove are provided inside the testing shell. An arc plate is slidably connected to the inside of the arc groove, and a bolt is threadedly connected to the arc plate. A cantilever is rotatably connected to the bolt, and a limiting shell is provided at the lower end of the cantilever.

[0007] Preferably, the first cavity is connected to the arc groove through the air outlet, the end of the arc plate away from the air outlet passes through the inner wall of the arc groove, the bolt is located at the end of the arc plate away from the air outlet, the limiting shell is located between the arc plate and the test shell, the bolt passes through the arc plate and the cantilever, and the end of the arc plate close to the cantilever is rotatably connected to the end of the cantilever away from the limiting shell through the bolt.

[0008] Preferably, the second turntable is located on a side of the test housing away from the arc groove, and the end of the first piston rod away from the sliding rod passes through the side of the test housing and extends to the inside of the first cavity, and the first piston rod is slidably connected to the first cavity.

[0009] Preferably, the main body mechanism includes a test base, a positioning groove and two third sliding grooves are provided on the top of the test base, a second motor is provided on the side of the test base, a bidirectional screw is rotatably connected to the second motor, and the shape of the third sliding groove is an isosceles trapezoid.

[0010] Preferably, the bidirectional screw rod passes through the side of the test base and extends to the interior of the two third slide grooves. The positioning groove is located between the two third slide grooves. The bottom of the limit shell is clamped with the positioning groove. The size of the positioning groove is adapted to the size of the bottom of the limit shell. The test shell is located below the test base, and the end of the arc plate close to the cantilever is located above the test base.

[0011] Preferably, a fixing mechanism is provided above the main body mechanism, and the fixing mechanism includes two movable shells, three second cavities are provided inside the movable shells, a second piston rod is slidably connected inside the second cavity, an elastic member is provided inside the second cavity, a splint is fixedly connected to the second piston rod, a plurality of ventilation grooves are provided inside the movable shells, a fixing groove is provided on the side where the two movable shells are close to each other, a plurality of air bags are provided on the inner wall of the fixing groove, and a second slider is fixedly connected to the bottom of the movable shell.

[0012] Preferably, the second piston rod is elastically connected to the inner wall of the second cavity through an elastic member, and the end of the second piston rod away from the elastic member passes through the inner wall of the second cavity and extends to the inside of the fixed groove, the splint is located inside the fixed groove, and the interior of the second cavity is communicated with the airbag through the ventilation groove, and the three splints are each provided with an anti-collision pad on the side close to each other, the size of the second slider is adapted to the size of the third slide groove, and the second slider is slidingly connected to the inner wall of the third slide groove, the two ends of the bidirectional screw rod respectively pass through the two second sliders and are threadedly connected to the two second sliders through threads, and the side of the splint close to the limiting shell is provided with an inclined surface.

[0013] A durability test method for automobile door stoppers, the test method is as follows: S1. First, place the bottom of the limit shell inside the positioning slot, and turn the bolt to remove it from the arc plate. Then, align the hole on the cantilever with the hole on the arc plate, and install the bolt so that one end of the arc plate close to the cantilever is rotatably connected to the end of the cantilever away from the limit shell. Then start the second motor to rotate the bidirectional screw rod. The rotation of the bidirectional screw rod will drive the two second sliders threadedly connected thereto to move in the direction of approaching each other through the two threads, driving the movable shell to move in the direction close to the limit shell. When the side of the limit shell squeezes the inclined surface on the splint, the splint will drive the second piston rod to squeeze the elastic part and the gas in the second cavity. The elastic force of the elastic part and the gas in the second cavity support the splint. The two ends of the second slide groove are respectively clamped and fixed by the three splints. At the same time, the gas in the second cavity will enter the airbag through the vent groove, causing the airbag to expand and further support the splint. Through the cooperation of the elastic part and the airbag, the force applied to the limit shell is absorbed during the test. S2. After the limiter is fixed, the first motor is started to rotate the first turntable. The rotation of the first turntable will drive the second turntable, whose top is limited by the first sliding groove and the threaded rod, to rotate eccentrically, and exert stress on the sliding rod through the second sliding groove, driving it to move in the direction away from the air outlet, generating negative pressure inside the arc groove, driving the arc plate to move closer to the air outlet, and indirectly driving the cantilever to swing on the limit housing. When the second turntable rotates eccentrically by more than 180 degrees, the stress will drive the first piston rod to reset, so that as the second turntable continues to rotate, the cantilever is driven to swing back and forth through the arc plate, simulating the state of the limiter when opening and closing the door, and by controlling the speed of the first motor, switching between fast impact and slow endurance is performed; S3. Simultaneously, when the device is stopped, the threaded rod is rotated to cause the first slider to drive the second turntable to move away from the test housing, thereby reducing the distance between the axis of the second turntable and the axis of the first turntable, reducing the amplitude of the eccentric rotation of the second turntable, and thereby indirectly reducing the amplitude of the cantilever swing.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. The present invention facilitates simulation testing of a vehicle door check by providing a second turntable and an arc-shaped plate. Starting the first motor causes the second turntable to rotate continuously through transmission, and drives the cantilever to swing back and forth through the arc-shaped plate, simulating the state of the check when the door is opened or closed. Furthermore, by controlling the speed of the first motor, switching between rapid impact and slow endurance can be performed, thereby achieving durability cycle testing, motion accuracy verification, and transient impact load evaluation of the vehicle door check. This provides quantitative data support for the optimization of the check performance, improves the degree of test automation and simulation accuracy, and generates a variable damping force by negative pressure, simulating air resistance, spring preload, and door closing impact, testing the durability of the check under real forces and improving the testing effect of the device. 2. The present invention facilitates adjustment of the cantilever's swing amplitude by providing a threaded rod and a second turntable. When the device is stopped, the threaded rod is rotated, causing the first slider to drive the second turntable away from the test housing, reducing the distance between the second turntable's axis and the first turntable's axis. This reduces the amplitude of the second turntable's eccentric rotation, thereby indirectly reducing the cantilever's swing amplitude. This linearly controls the cantilever's swing angle (for example, from ±45° to ±30°), adapting to the travel limit testing requirements of different vehicle door models, improving the device's versatility, and enabling the performance of multiple data sets. 3. The present invention facilitates the fixation of the vehicle door limiter by setting up structures such as positioning grooves and splints. The second motor is started to support the splint through transmission by the elastic force of the elastic member and the gas in the second cavity. The two ends of the second slide groove are clamped and fixed by three splints respectively, which is convenient for fixing vehicle door limiters of various specific specifications. The specific specifications refer to that the bottom of the limit shell is adapted to the positioning groove and the length of the cantilever is the same. The limiters of different sizes and shapes on the top of the limit shell are improved. The scope of application of the device is improved, and the airbag will be inflated and further support the splint. Through the cooperation of the elastic member and the airbag, the force applied to the limit shell can be absorbed during the test to prevent it from vibrating and affecting the test results. In combination with the anti-collision pad, the damage caused by hard squeezing of the limit shell can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of Example 1 and Example 2 of the present application; Figure 2 It is a top view structural diagram of the main body of this application; Figure 3 It is a schematic cross-sectional structure diagram of the subject organization of this application; Figure 4 is a schematic cross-sectional view of Example 2 of the present application; Figure 5is a schematic cross-sectional structural diagram of Example 1 of the present application; Figure 6 This is a schematic diagram of the structure of the fixing mechanism of the present application when viewed from above; Explanation of Reference Numerals: 1. Adjusting mechanism; 101. First motor; 102. First rotary disk; 103. First slide groove; 104. Threaded rod; 105. First piston rod; 106. First slider; 107. Second rotary disk; 108. Second slide groove; 109. Slide rod; 2. Testing mechanism; 201. Testing housing; 202. First cavity; 203. Air outlet; 204. Arc groove; 205. Arc plate; 206. Bolt; 207. Cantilever; 208. Limiting shell; 3. Main body; 301. Test base; 302. Positioning slot; 303. Third slide slot; 304. Second motor; 305. Bidirectional screw; 4. Fixing mechanism; 401. Moving shell; 402. Second cavity; 403. Second piston rod; 404. Elastic member; 405. Clamp; 406. Vent slot; 407. Airbag; 408. Second slider; 409. Fixing slot. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0017] Example 1: A durability test device for automobile door stoppers, referring to Figure 5 and Figure 6 , including the main body 3, and also including: Adjustment mechanism 1, which is located on the side of the main body mechanism 3; Among them, the adjustment mechanism 1 includes a first motor 101, a first turntable 102, a first slide 103, a threaded rod 104, a first piston rod 105, a first slider 106, a second turntable 107, a second slide 108 and a slide rod 109. The top of the first motor 101 is rotatably connected to the first turntable 102 for driving the second turntable 107 to eccentrically rotate. The top of the first turntable 102 is provided with a first slide 103. The first turntable 102 is rotatably connected with the threaded rod 104. The first slide 103 is internally slidably connected to the first slider 106. The top of the first slider 106 is fixedly connected to the second turntable 107. The top of the second turntable 107 is provided with a second slide 108 for applying stress to the slide rod 109. The second slide 108 is internally slidably connected to the slide rod 109. The top of the slide rod 109 is fixedly connected to the first piston rod 105.

[0018] One end of the threaded rod 104 with a thread passes through the side of the first turntable 102 and extends to the inside of the first slide groove 103. The end of the threaded rod 104 close to the first slide groove 103 passes through the first slider 106 and is threadedly connected to it through a thread. The shape of the first slide groove 103 is an isosceles trapezoid, and the size of the first slider 106 is adapted to the size of the first slide groove 103.

[0019] A test mechanism 2 is provided inside the main body mechanism 3, and the test mechanism 2 is located on the side of the adjustment mechanism 1. The test mechanism 2 includes a test shell 201. The interior of the test shell 201 is provided with a first cavity 202, an air outlet 203 and an arc groove 204. The interior of the arc groove 204 is slidably connected with an arc plate 205, and a bolt 206 is threadedly connected to the arc plate 205. A cantilever 207 is rotatably connected to the bolt 206, and a limiting shell 208 is provided at the lower end of the cantilever 207.

[0020] The first cavity 202 is connected to the arc groove 204 through the air outlet 203, and the end of the arc plate 205 away from the air outlet 203 passes through the inner wall of the arc groove 204. The bolt 206 is located at the end of the arc plate 205 away from the air outlet 203. The limiting shell 208 is located between the arc plate 205 and the test shell 201, and the bolt 206 passes through the arc plate 205 and the cantilever 207. The end of the arc plate 205 close to the cantilever 207 is rotatably connected to the end of the cantilever 207 away from the limiting shell 208 through the bolt 206. The second turntable 107 is located on the side of the test shell 201 away from the arc groove 204. The end of the first piston rod 105 away from the sliding rod 109 passes through the side of the test shell 201 and extends to the interior of the first cavity 202. The first piston rod 105 is slidably connected to the first cavity 202.

[0021] The implementation principle of the embodiment of the present application is as follows: by arranging the second turntable 107 and the curved plate 205 and other structures to cooperate, it is convenient to simulate the test of the door limiter, start the first motor 101 to rotate the first turntable 102, and the rotation of the first turntable 102 will drive the second turntable 107 whose top is limited by the first slide groove 103 and the threaded rod 104 to rotate eccentrically, and exert stress on the slide rod 109 through the second slide groove 108, driving it to move in the direction away from the air outlet 203, generating negative pressure inside the curved groove 204, driving the curved plate 205 to move closer to the air outlet 203, and indirectly driving the cantilever 207 to swing on the limiting housing 208, and when the second turntable 107 rotates eccentrically After moving more than 180°, the first piston rod 105 will be driven to reset by stress, so that as the second turntable 107 continues to rotate, the cantilever 207 is driven to swing back and forth through the arc plate 205, simulating the state of the limiter when opening and closing the door. In addition, by controlling the speed of the first motor 101, fast impact and slow endurance can be switched to achieve durability cycle testing, motion accuracy verification and transient impact load evaluation of the door limiter, providing quantitative data support for the performance optimization of the limiter, improving the degree of test automation and simulation accuracy, wherein the negative pressure generates a variable damping force, simulating air resistance, spring preload and door closing impact, testing the durability of the limiter under real force, and improving the test effect of the device; By arranging the threaded rod 104 and the second turntable 107 and other structures in coordination, it is convenient to adjust the swing amplitude of the cantilever 207. When the device is stopped, the threaded rod 104 is rotated to cause the first slider 106 to drive the second turntable 107 to move away from the test housing 201, thereby reducing the distance between the axis of the second turntable 107 and the axis of the first turntable 102, reducing the amplitude of the eccentric rotation of the second turntable 107, and indirectly reducing the swing amplitude of the cantilever 207. The swing of the cantilever 207 is linearly controlled (from ±45° to ±30°), adapting to the limit stroke test requirements of the doors of different models, improving the versatility of the device, and allowing for multiple sets of data tests.

[0022] Example 2: A durability test device for automobile door stoppers, referring to Figures 2 to 6The main body mechanism 3 includes a test base 301, a positioning groove 302 and two third sliding grooves 303 are provided on the top of the test base 301, a second motor 304 is provided on the side of the test base 301, and a bidirectional screw rod 305 is rotatably connected to the second motor 304. The shape of the third sliding groove 303 is an isosceles trapezoid, and the bidirectional screw rod 305 passes through the side of the test base 301 and extends to the inside of the two third sliding grooves 303. The positioning groove 302 is located between the two third sliding grooves 303, and the bottom of the limit shell 208 is clamped with the positioning groove 302. The size of the positioning groove 302 is adapted to the size of the bottom of the limit shell 208. The test shell 201 is located below the test base 301, and the end of the arc plate 205 close to the cantilever 207 is located above the test base 301.

[0023] A fixing mechanism 4 is provided above the main body mechanism 3, and the fixing mechanism 4 includes two movable shells 401, and three second cavities 402 are provided inside the movable shells 401. The second piston rod 403 is slidably connected inside the second cavity 402, and an elastic member 404 is provided inside the second cavity 402. A splint 405 is fixedly connected to the second piston rod 403. Several ventilation grooves 406 are provided inside the movable shells 401, and a fixing groove 409 is provided on the side where the two movable shells 401 are close to each other. Several air bags 407 are provided on the inner wall of the fixing groove 409, and a second slider 408 is fixedly connected to the bottom of the movable shell 401.

[0024] The second piston rod 403 is elastically connected to the inner wall of the second cavity 402 through the elastic member 404, and the end of the second piston rod 403 away from the elastic member 404 passes through the inner wall of the second cavity 402 and extends to the inside of the fixed groove 409, and the splint 405 is located inside the fixed groove 409. The interior of the second cavity 402 is communicated with the airbag 407 through the ventilation groove 406. The three splints 405 are close to each other on the side with anti-collision pads. The size of the second slider 408 is adapted to the size of the third slide groove 303. The second slider 408 is slidingly connected to the inner wall of the third slide groove 303. The two ends of the bidirectional screw rod 305 respectively pass through the two second sliders 408 and are threadedly connected to the two second sliders 408 through threads. The side of the splint 405 close to the limit shell 208 is provided with an inclined surface.

[0025] The implementation principle of the embodiment of the present application is as follows: by setting the positioning groove 302 and the clamping plate 405 and other structures to cooperate, it is convenient to fix the car door limiter, start the second motor 304 to rotate the bidirectional screw rod 305, and the rotation of the bidirectional screw rod 305 will drive the two second sliders 408 threadedly connected thereto to move in the direction of approaching each other through the two threads, driving the movable shell 401 to move in the direction close to the limiting shell 208. When the side of the limiting shell 208 squeezes the inclined surface on the clamping plate 405, the clamping plate 405 will drive the second piston rod 403 to squeeze the elastic member 404 and the gas in the second cavity 402. The clamping plate 405 is supported by the elastic force of the elastic member 404 and the gas in the second cavity 402, and the two ends of the second slide groove 108 are respectively It is clamped and fixed by three clamping plates 405, which is convenient for fixing car door limiters of various specific specifications. The specific specifications refer to that the bottom of the limit shell 208 is adapted to the positioning groove 302, and the length of the cantilever 207 is connected. The limiters of different sizes and shapes on the top of the limit shell 208 are limited to improve the applicability of the device. At the same time, the gas in the second cavity 402 will enter the airbag 407 through the ventilation groove 406, causing the airbag 407 to expand and further support the clamping plate 405. Through the cooperation of the elastic member 404 and the airbag 407, the force applied to the limit shell 208 can be absorbed during the test to prevent it from vibrating and affecting the test results. In combination with the anti-collision pad, the limit shell 208 can be avoided from being damaged by hard squeezing.

[0026] A durability test method for automobile door stoppers, the test method is as follows: S1. First, place the bottom of the limiting housing 208 inside the positioning groove 302, and rotate the bolt 206 to remove it from the arc plate 205. Then, align the hole on the cantilever 207 with the hole on the arc plate 205, and install the bolt 206, so that the end of the arc plate 205 close to the cantilever 207 is rotatably connected to the end of the cantilever 207 away from the limiting housing 208. Then start the second motor 304 to rotate the bidirectional screw rod 305. The rotation of the bidirectional screw rod 305 will drive the two second sliders 408 threadedly connected thereto to move in the direction of approaching each other through the two threads, and drive the movable housing 401 to move in the direction close to the limiting housing 208. When the side surface of the limiting shell 208 squeezes the inclined surface on the clamping plate 405, the clamping plate 405 drives the second piston rod 403 to squeeze the elastic member 404 and the gas in the second cavity 402. The elastic force of the elastic member 404 and the gas in the second cavity 402 support the clamping plate 405. The two ends of the second slide 108 are clamped and fixed by the three clamping plates 405 respectively. At the same time, the gas in the second cavity 402 enters the airbag 407 through the vent groove 406, causing the airbag 407 to expand and further support the clamping plate 405. The cooperation between the elastic member 404 and the airbag 407 can absorb the force applied to the limiting shell 208 during the test. After the second rotary disc 107 is eccentrically rotated by more than 180 degrees, the first piston rod 105 is driven to reset by the stress, thereby driving the cantilever 207 to swing back and forth through the arc plate 205 as the second rotary disc 107 continues to rotate, simulating the state of the limiter when opening and closing the door, and switching between fast impact and slow endurance can be performed by controlling the speed of the first motor 101. S3. At the same time, the threaded rod 104 can be rotated when the device is stopped, so that the first slider 106 drives the second turntable 107 to move away from the test housing 201, thereby reducing the distance between the axis of the second turntable 107 and the axis of the first turntable 102, reducing the amplitude of the eccentric rotation of the second turntable 107, and indirectly reducing the amplitude of the swing of the cantilever 207.

[0027] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A vehicle door stopper durability testing device, comprising a main body mechanism (3), characterized in that: Also includes: An adjusting mechanism (1), the adjusting mechanism (1) being located on a side of the main body mechanism (3); The regulating mechanism (1) comprises a first motor (101), a first turntable (102), a first slide groove (103), a threaded rod (104), a first piston rod (105), a first slider (106), a second turntable (107), a second slide groove (108) and a slide rod (109), wherein the top of the first motor (101) is rotatably connected to the first turntable (102) for driving the second turntable (107) to rotate eccentrically, and the top of the first turntable (102) is provided with a first slide groove (103), and the A threaded rod (104) is rotatably connected to the first turntable (102), a first slider (106) is slidably connected inside the first slide groove (103), a second turntable (107) is fixedly connected to the top of the first slider (106), a second slide groove (108) for applying stress to the slide rod (109) is provided on the top of the second turntable (107), a slide rod (109) is slidably connected inside the second slide groove (108), and a first piston rod (105) is fixedly connected to the top of the slide rod (109).

2. The vehicle door check durability testing device according to claim 1, characterized in that: One end of the threaded rod (104) provided with a thread passes through the side of the first turntable (102) and extends to the inside of the first slide groove (103); one end of the threaded rod (104) close to the first slide groove (103) passes through the first slider (106) and is threadedly connected to the slider via a thread; the first slide groove (103) has an isosceles trapezoidal shape, and the size of the first slider (106) matches the size of the first slide groove (103).

3. The vehicle door check durability testing device according to claim 1, characterized in that: A testing mechanism (2) is provided inside the main body mechanism (3), and the testing mechanism (2) is located on the side of the adjustment mechanism (1). The testing mechanism (2) comprises a testing housing (201), and a first cavity (202), an air outlet (203), and an arc-shaped groove (204) are provided inside the testing housing (201). An arc-shaped plate (205) is slidably connected inside the arc-shaped groove (204), a bolt (206) is threadedly connected to the arc-shaped plate (205), a cantilever (207) is rotatably connected to the bolt (206), and a limit housing (208) is provided at the lower end of the cantilever (207).

4. The vehicle door check durability testing device according to claim 3, characterized in that: The first cavity (202) is communicated with the arc groove (204) through the air outlet (203); one end of the arc plate (205) away from the air outlet (203) passes through the inner wall of the arc groove (204); the bolt (206) is located at the end of the arc plate (205) away from the air outlet (203); the limiting shell (208) is located between the arc plate (205) and the test shell (201); the bolt (206) passes through the arc plate (205) and the cantilever (207); and one end of the arc plate (205) close to the cantilever (207) is rotatably connected to the end of the cantilever (207) away from the limiting shell (208) through the bolt (206).

5. The vehicle door check durability testing device according to claim 3, characterized in that: The second turntable (107) is located on a side of the test housing (201) away from the arc groove (204), and an end of the first piston rod (105) away from the sliding rod (109) passes through the side of the test housing (201) and extends to the inside of the first cavity (202), and the first piston rod (105) is slidably connected to the first cavity (202).

6. The vehicle door check durability testing device according to claim 3, characterized in that: The main body mechanism (3) comprises a test base (301), a positioning groove (302) and two third slide grooves (303) are provided on the top of the test base (301), a second motor (304) is provided on the side of the test base (301), a bidirectional screw rod (305) is rotatably connected to the second motor (304), and the outer shape of the third slide groove (303) is an isosceles trapezoid.

7. The vehicle door check durability testing device according to claim 6, characterized in that: The bidirectional screw rod (305) passes through the side of the test base (301) and extends to the inside of the two third slide grooves (303). The positioning groove (302) is located between the two third slide grooves (303). The bottom of the limiting shell (208) is clamped with the positioning groove (302). The size of the positioning groove (302) is adapted to the size of the bottom of the limiting shell (208). The test shell (201) is located below the test base (301), and the end of the arc plate (205) close to the cantilever (207) is located above the test base (301).

8. The vehicle door check durability testing device according to claim 6, characterized in that: A fixing mechanism (4) is provided above the main body mechanism (3), and the fixing mechanism (4) includes two movable shells (401), three second cavities (402) are provided inside the movable shells (401), a second piston rod (403) is slidably connected inside the second cavity (402), an elastic member (404) is provided inside the second cavity (402), a clamping plate (405) is fixedly connected to the second piston rod (403), a plurality of ventilation grooves (406) are provided inside the movable shells (401), a fixing groove (409) is provided on the side close to each other of the two movable shells (401), a plurality of air bags (407) are provided on the inner wall of the fixing groove (409), and a second slider (408) is fixedly connected to the bottom of the movable shell (401).

9. The vehicle door check durability testing device according to claim 8, characterized in that: The second piston rod (403) is elastically connected to the inner wall of the second cavity (402) through the elastic member (404). The end of the second piston rod (403) away from the elastic member (404) passes through the inner wall of the second cavity (402) and extends to the interior of the fixing groove (409). The clamping plate (405) is located inside the fixing groove (409). The interior of the second cavity (402) is communicated with the air bag (407) through the ventilation groove (406). The three clamping plates (405) are connected to the inner wall of the second cavity (402). 05) are provided with anti-collision pads on the sides close to each other, the size of the second slider (408) is adapted to the size of the third slide groove (303), the second slider (408) is slidably connected to the inner wall of the third slide groove (303), the two ends of the bidirectional screw rod (305) respectively pass through the two second sliders (408) and are respectively threadedly connected to the two second sliders (408) through threads, and the side of the splint (405) close to the limiting shell (208) is provided with an inclined surface.

10. A method for testing the durability of an automobile door check, applied to the apparatus for testing the durability of an automobile door check according to claims 1 to 9, characterized in that: The test method is as follows: S1. First, place the bottom of the limiting housing (208) inside the positioning groove (302), and rotate the bolt (206) to remove it from the arc plate (205), then align the hole on the cantilever (207) with the hole on the arc plate (205), and install the bolt (206), so that the end of the arc plate (205) close to the cantilever (207) is rotatably connected to the end of the cantilever (207) away from the limiting housing (208), and then start the second motor (304) to rotate the bidirectional screw rod (305). The rotation of the bidirectional screw rod (305) will drive the two second sliders (408) threadedly connected thereto to move in a direction close to each other through two threads, and drive the movable housing (401) to move in a direction close to the limiting housing (208). When the side of the limiting shell (208) squeezes the inclined surface on the splint (405), the splint (405) drives the second piston rod (403) to squeeze the elastic member (404) and the gas in the second cavity (402), and the splint (405) is supported by the elastic force of the elastic member (404) and the gas in the second cavity (402). The two ends of the second slide groove (108) are clamped and fixed by the three splints (405), and at the same time, the gas in the second cavity (402) enters the airbag (407) through the vent groove (406), causing the airbag (407) to expand and further support the splint (405). Through the cooperation of the elastic member (404) and the airbag (407), the force applied to the limiting shell (208) is absorbed during the test. S2. After the limiter is fixed, the first motor (101) is started to rotate the first turntable (102). The rotation of the first turntable (102) drives the second turntable (107) whose top is limited by the first slide groove (103) and the threaded rod (104) to rotate eccentrically, and exerts stress on the slide rod (109) through the second slide groove (108), driving it to move away from the air outlet (203), generating negative pressure inside the arc groove (204), driving the arc plate (205) to move closer to the air outlet. The hole (203) moves, and indirectly drives the cantilever (207) to swing on the limit housing (208). When the second turntable (107) rotates eccentrically by more than 180 degrees, the first piston rod (105) is driven to reset by stress, so that as the second turntable (107) continues to rotate, the cantilever (207) is driven to swing back and forth through the arc plate (205), simulating the state of the limiter when opening and closing the door, and by controlling the speed of the first motor (101), switching between fast impact and slow endurance is performed; S3. Simultaneously, when the device is in a stopped state, the threaded rod (104) is rotated, so that the first slider (106) drives the second turntable (107) to move in a direction away from the test housing (201), thereby reducing the distance between the axis of the second turntable (107) and the axis of the first turntable (102), reducing the amplitude of the eccentric rotation of the second turntable (107), and thereby indirectly reducing the amplitude of the swing of the cantilever (207).

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