An apparatus and method for durability test of opening and closing of a vehicle rear door

Abstract

The present application relates to a device and method for durability testing of the opening and closing of a vehicle's rear door, belonging to the technical field of automotive development testing technology. It includes a robotic arm mechanism for being arranged outside the rear door; an unlocking component arranged on the robotic arm mechanism for unlocking the rear door; a door pushing mechanism arranged inside the rear door for opening the unlocked rear door; and a pushing component arranged on the robotic arm mechanism for moving along with the robotic arm mechanism and abutting against the outside of the rear door to drive the closing of the rear door. Since the unlocking component and the pushing component are provided on the robotic arm mechanism, the automatic opening and closing of the rear door can be achieved through the movement of the robotic arm mechanism and the pushing action of the door pushing mechanism. The test proceeds smoothly and is not prone to wear and tear itself, solving the problem that the occurrence of a test accident may be caused by the breakage of the pulling belt during the test, and the replacement of the pulling belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive development testing, and particularly relates to a device and method for durability testing of the opening and closing of a vehicle's rear door. Background Art

[0002] The rear cover of an automobile, also known as a trunk lid or tailgate, its main function is to facilitate users to place luggage or items in the vehicle. During daily use of the vehicle, people need to often open the rear cover to pick up and place items, and then close the rear cover. This places certain requirements on the operating durability of the rear cover. In the durability test of the rear cover of a whole vehicle, with the actual vehicle as the test carrier, by designing corresponding durability test devices, the rear cover is repeatedly opened and closed to simulate the working conditions of a user opening and closing the rear cover a certain number of times during the entire life cycle of the vehicle. During and after the test, it is necessary to evaluate the appearance, functionality, and comfort of important parts on the rear cover, such as the rear cover sheet metal, rear cover hinge, rear cover lock system, rear cover sealing strip, etc.

[0003] In the prior art, such as a rear door opening and closing durability test device with the patent number CN114942147A, which includes an aluminum mechanical base, a closing cylinder, an opening cylinder, a pull belt guide cylinder, and a pull belt; the closing cylinder, the opening cylinder, and the pull belt guide cylinder are respectively installed on the aluminum mechanical base; one of the pull belt guide cylinders is fixed on the top of the aluminum mechanical base; two of the pull belt guide cylinders are fixed on the bottom of the aluminum mechanical base; one end of the pull belt bypasses the pull belt guide cylinder on the top of the aluminum mechanical base and is connected to the piston rod of the opening cylinder, and the other end bypasses the two pull belt guide cylinders at the bottom of the aluminum mechanical base and then bypasses the movable pulley at the front end of the piston rod of the opening cylinder and is connected to the bottom of the aluminum mechanical base; the closing cylinder is connected to the pull belt through a movable pulley; the middle position of the pull belt is connected to the rear door, and the opening or closing of the rear door is completed by means of the connection between the pull belt and the rear door.

[0004] However, excessive use of the pull belt will cause wear and tear. When the pull belt breaks during the test, it may cause test accidents, and replacing the pull belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle. Summary of the Invention

[0005] The present application provides a device and method for durability testing of the opening and closing of a vehicle's rear door, which can solve the problems in the prior art that excessive use of the pull belt will cause wear and tear, when the pull belt breaks during the test, it may cause test accidents, and replacing the pull belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle.

[0006] In a first aspect, an embodiment of the present application provides a device for durability testing of the opening and closing of a vehicle's rear door, which includes:

[0007] A robotic arm mechanism, which is used to be arranged on the outer side of the rear door;

[0008] An unlocking component, which is arranged on the robotic arm mechanism and is used to unlock the rear door;

[0009] A door pushing mechanism, which is used to be arranged on the inner side of the rear door and is used to open the unlocked rear door;

[0010] A pushing component, which is arranged on the robotic arm mechanism and is used to move along with the robotic arm mechanism, abut against the outer side of the rear door and drive the rear door to close.

[0011] Combined with the first aspect, in an embodiment, the unlocking component includes:

[0012] A fixing unit, which is arranged on the robotic arm mechanism;

[0013] A first movable rod, one end of which is movably connected to the fixing unit;

[0014] A second movable rod, which includes a rod portion and a pulling head arranged at the end of the rod portion. The rod portion is movably connected to the other end of the first movable rod, and the pulling head is used to be connected to the switch of the rear door;

[0015] A telescopic rod, the fixed end of which is connected to the robotic arm mechanism, and the telescopic end is movably connected to the end of the rod portion far from the pulling head. The telescopic rod is used to drive the first movable rod and the second movable rod to move, so that the pulling head is connected to the switch of the rear door.

[0016] Combined with the first aspect, in an embodiment, the fixing unit includes:

[0017] A fixing plate, which is arranged on the robotic arm mechanism;

[0018] A fixing rod, one end of which is connected to the fixing plate and the other end is movably connected to the first movable rod.

[0019] Combined with the first aspect, in an embodiment, the pushing component includes:

[0020] A mounting bracket, which is arranged on the robotic arm mechanism;

[0021] A pushing head, which is arranged at the end of the mounting bracket, and the thickness of the pushing head is greater than the thickness of the mounting bracket. The pushing head is used to abut against the rear door.

[0022] Combined with the first aspect, in an embodiment, a mounting shaft is arranged on the robotic arm mechanism, and the pushing component further includes a mounting shaft sleeve, which is sleeved on the mounting shaft.

[0023] In combination with the first aspect, in one embodiment, the robotic arm mechanism includes a first articulated arm, a second articulated arm, and a third articulated arm that are connected in sequence. The first articulated arm is arranged in the vertical direction. One end of the first articulated arm is rotatably connected to one end of the second articulated arm. The second articulated arm can rotate around the connection point with the first articulated arm in the vertical plane. The third articulated arm is rotatably connected to the other end of the second articulated arm. The third articulated arm can rotate around the connection point with the second articulated arm in the vertical plane. The unlocking assembly and the pushing assembly are provided on the third articulated arm.

[0024] In combination with the first aspect, in one embodiment, the third articulated arm includes a connecting section and a rotating section. The connecting section is rotatably connected to the other end of the second articulated arm. The rotating section is rotationally connected to the connecting section. The unlocking assembly and the pushing assembly are both provided on the rotating section. The rotating section can be switched to use the unlocking assembly or the pushing assembly by rotation.

[0025] In combination with the first aspect, in one embodiment, a base is provided at the other end of the first articulated arm. The first articulated arm is rotatably connected to the base.

[0026] In combination with the first aspect, in one embodiment, a door detection unit is further included. The door detection unit is provided on the door pushing mechanism and is used to detect whether the rear door is closed.

[0027] In a second aspect, an embodiment of the present application further provides a method for a durability test of the opening and closing of a vehicle rear door, which is implemented by using the above-mentioned device for a durability test of the opening and closing of a vehicle rear door, and includes the following steps:

[0028] Select the rear door to be tested, arrange the robotic arm mechanism outside the rear door, and arrange the door pushing mechanism inside the rear door;

[0029] The robotic arm mechanism moves to unlock the rear door through the unlocking assembly. After unlocking, the robotic arm mechanism returns to the initial position;

[0030] The door pushing mechanism pushes the unlocked rear door to open the rear door;

[0031] The robotic arm mechanism moves to close the rear door through the pushing assembly.

[0032] The beneficial effects brought by the technical solutions provided by the embodiments of the present application include:

[0033] When using the device for the durability test of the opening and closing of the rear door of a vehicle, the robotic arm mechanism is arranged on the outer side of the rear door, and the door pushing mechanism is arranged on the inner side of the rear door. The robotic arm mechanism moves to unlock the rear door through the unlocking component. After unlocking, the robotic arm mechanism returns to the initial position. The door pushing mechanism pushes the unlocked rear door to open it. The robotic arm mechanism moves and drives the closing of the rear door by abutting against the outer side of the rear door through the pushing component. Since the unlocking component and the pushing component are provided on the robotic arm mechanism, the automatic opening and closing of the rear door can be realized through the movement of the robotic arm mechanism and the pushing action of the door pushing mechanism. The test proceeds smoothly and is not prone to wear and tear itself, solving the problems in the prior art that excessive use of the pull belt will cause wear and tear, and the breakage of the pull belt during the test may cause test accidents. Moreover, replacing the pull belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0036] Figure 2 It is a schematic structural diagram of the unlocking component in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0037] Figure 3 It is a schematic structural diagram of the pushing component in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0038] Figure 4 It is a schematic structural diagram of the arrangement positions of the unlocking component and the pushing component in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0039] Figure 5 It is a schematic diagram of the unlocking process of the unlocking component in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0040] Figure 6 It is a schematic diagram of the process of opening the door in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0041] Figure 7 It is a schematic diagram of the rotation process of the rotating section in an embodiment of a device for the durability test of the opening and closing of the rear door of a vehicle according to the present invention.

[0042] Figure 8 This is a schematic diagram of a partial structure of an unlocking component in an embodiment of a device for the opening and closing durability test of a vehicle rear door according to the present invention.

[0043] In the figure: 1. Robot arm mechanism; 11. First articulated arm; 12. Second articulated arm; 13. Third articulated arm; 131. Mounting shaft; 132. Rotating section; 133. Connecting section; 14. Base; 2. Rear door; 3. Unlocking component; 31. First movable rod; 32. Second movable rod; 321. Pulling head; 33. Telescopic rod; 34. Fixed plate; 35. Fixed rod; 4. Door pushing mechanism; 5. Pushing component; 51. Mounting bracket; 52. Pushing head; 53. Mounting bushing; 6. Door detection unit. Detailed implementation manners

[0044] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0045] The embodiments of this application provide a device and method for the opening and closing durability test of a vehicle rear door, which can solve the problems in the prior art that excessive use of the pull belt will cause wear and tear, and when the pull belt breaks during the test, it may cause test accidents, and replacing the pull belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle.

[0046] As Figure 1 、 Figure 5 、 Figure 6 and Figure 7 shown, on the one hand, this application provides a device for the opening and closing durability test of a vehicle rear door, which includes:

[0047] A robot arm mechanism 1, which is used to be arranged outside the rear door 2;

[0048] An unlocking component 3, which is arranged on the robot arm mechanism 1 and is used to unlock the rear door 2;

[0049] A door pushing mechanism 4, which is used to be arranged inside the rear door 2 and is used to open the unlocked rear door 2;

[0050] A pushing component 5, which is arranged on the robot arm mechanism 1 and is used to move along with the robot arm mechanism 1 and abut against the outside of the rear door 2 to drive the rear door 2 to close.

[0051] When using the device for the durability test of the opening and closing of the rear door of a vehicle, the robotic arm mechanism 1 is arranged outside the rear door 2, and the door pushing mechanism 4 is arranged inside the rear door 2. The robotic arm mechanism 1 moves to unlock the rear door 2 through the unlocking component 3. After unlocking, the robotic arm mechanism 1 returns to the initial position. The door pushing mechanism 4 pushes the unlocked rear door 2 to open the rear door 2. The robotic arm mechanism 1 moves and drives the closing of the rear door by abutting against the outside of the rear door 2 through the pushing component 5. Since the unlocking component 3 and the pushing component 5 are provided on the robotic arm mechanism 1, the automatic opening and closing of the rear door 2 can be realized through the movement of the robotic arm mechanism 1 and the pushing action of the door pushing mechanism 4. The test proceeds smoothly and the device is not easily damaged. It solves the problems in the prior art that excessive use of the pull belt will cause wear, and when the pull belt breaks during the test, it may cause test accidents, and replacing the pull belt will cause the durability test to be interrupted, which may affect the progress of the test and prolong the test cycle.

[0052] In this example, it further includes a control unit for controlling the robotic arm mechanism 1 and the door pushing mechanism 4 to simulate the opening and closing of the rear door 2 by a human hand.

[0053] As Figure 1 、 Figure 2 、 Figure 4 and Figure 8 shown, in some alternative embodiments, the unlocking component 3 includes:

[0054] A fixing unit which is arranged on the robotic arm mechanism 1;

[0055] A first movable rod 31, one end of which is movably connected to the fixing unit;

[0056] A second movable rod 32, which includes a rod portion and a pulling head 321 arranged at the end of the rod portion. The rod portion is movably connected to the other end of the first movable rod 31, and the pulling head 321 is used for connection with the switch of the rear door 2;

[0057] A telescopic rod 33, whose fixed end is connected to the robotic arm mechanism 1 and the telescopic end is movably connected to the end of the rod portion far from the pulling head 321. The telescopic rod 33 is used to drive the first movable rod 31 and the second movable rod 32 to move, so that the pulling head 321 is connected to the switch of the rear door 2.

[0058] In this embodiment, the structure of the unlocking component 3 is specifically described. The unlocking component 3 includes a fixing unit, a first movable rod 31, a second movable rod 32, and a telescopic rod 33. Among them, the fixing unit is arranged on the robotic arm mechanism 1. One end of the first movable rod 31 is movably connected to the fixing unit. The second movable rod 32 includes a rod portion and a pulling head 321 arranged at the end of the rod portion. The rod portion is movably connected to the other end of the first movable rod 31. The pulling head 321 is used for switch connection with the rear door 2. The fixed end of the telescopic rod 33 is connected to the robotic arm mechanism 1, and the telescopic end is movably connected to the end of the rod portion away from the pulling head 321. The telescopic rod 33 is used to drive the first movable rod 31 and the second movable rod 32 to move, so that the pulling head 321 is connected to the switch of the rear door 2. Through the link structure, when the telescopic rod 33 contracts, it drives the second movable rod 32 to move, so that the pulling head 321 at the end of the rod portion extends to the switch of the rear door 2. Then, when the telescopic rod 33 extends, it drives the second movable rod 32 to move, so that the pulling head 321 at the end of the rod portion retracts, opening the switch of the rear door 2 to complete the unlocking process. The structure is simple and easy to implement.

[0059] As Figure 2 , Figure 4 and Figure 8 shown, in some alternative embodiments, the fixing unit includes:

[0060] A fixing plate 34, which is arranged on the robotic arm mechanism 1;

[0061] A fixing rod 35, one end of which is connected to the fixing plate 34 and the other end is movably connected to the first movable rod 31.

[0062] In this embodiment, the structure of the fixing unit is specifically described. The fixing unit includes a fixing plate 34 and a fixing rod 35. Among them, the fixing plate 34 is arranged on the robotic arm mechanism 1. The fixing rod 35 is located below the fixing plate 34. One end of the fixing rod 35 is connected to the fixing plate 34 and the other end is movably connected to the first movable rod 31. The first movable rod 31 is connected to the fixing plate 34 through the fixing rod 35, making the movement of the link structure smoother and the process of unlocking the rear door 2 more stable.

[0063] As Figure 1 , Figure 3 and Figure 4 shown, in some alternative embodiments, the pushing component 5 includes:

[0064] A mounting bracket 51, which is arranged on the robotic arm mechanism 1;

[0065] A pushing head 52, which is arranged at the end of the mounting bracket 51, and the thickness of the pushing head 52 is greater than the thickness of the mounting bracket 51. The pushing head 52 is used for abutting against the rear door 2.

[0066] In this embodiment, the specific structure of the pushing component 5 is described. The pushing component 5 includes a mounting frame 51 and a pushing head 52. Among them, the mounting frame 51 is arranged on the robotic arm mechanism 1, and the pushing head 52 is arranged at the end of the mounting frame 51. Moreover, the thickness of the pushing head 52 is greater than that of the mounting frame 51. The pushing head 52 is used to abut against the rear door 2. The thickness of the pushing head 52 is greater than that of the mounting frame 51, which can prevent the mounting frame 51 from colliding with the rear door 2 when pushing the rear door 2 to close. The structure is simple and convenient for manufacturing.

[0067] In this example, the pushing head 52 is made of sponge.

[0068] As Figure 4 shown, in some alternative embodiments, a mounting shaft 131 is provided on the robotic arm mechanism 1. The pushing component 5 further includes a mounting shaft sleeve 53, and the mounting shaft sleeve 53 is sleeved on the mounting shaft 131.

[0069] In this embodiment, a mounting shaft 131 is provided on the robotic arm mechanism 1. The pushing component 5 further includes a mounting shaft sleeve 53, and the mounting shaft sleeve 53 is sleeved on the mounting shaft 131, which is convenient for mounting the pushing component 5 on the robotic arm mechanism 1.

[0070] As Figure 1 shown, in some alternative embodiments, the robotic arm mechanism 1 includes a first joint arm 11, a second joint arm 12, and a third joint arm 13 that are connected in sequence. The first joint arm 11 is arranged in the vertical direction. One end of the first joint arm 11 is rotatably connected to one end of the second joint arm 12. The second joint arm 12 can rotate around the connection point with the first joint arm 11 in the vertical plane. The third joint arm 13 is rotatably connected to the other end of the second joint arm 12. The third joint arm 13 can rotate around the connection point with the second joint arm 12 in the vertical plane. An unlocking component 3 and a pushing component 5 are provided on the third joint arm 13.

[0071] In this embodiment, the structure of the robotic arm mechanism 1 is specifically described. The robotic arm mechanism 1 includes a first joint arm 11, a second joint arm 12, and a third joint arm 13 that are connected in sequence. Among them, the first joint arm 11 is arranged in the vertical direction. One end of the first joint arm 11 is rotatably connected to one end of the second joint arm 12. The second joint arm 12 can rotate around the connection point with the first joint arm 11 in the vertical plane. The third joint arm 13 is rotatably connected to the other end of the second joint arm 12. The third joint arm 13 can rotate around the connection point with the second joint arm 12 in the vertical plane. An unlocking component 3 and a pushing component 5 are provided on the third joint arm 13. The robotic arm mechanism 1 can more conveniently bring the unlocking component 3 and the pushing component 5 into contact with the rear door 2, facilitating the durability test.

[0072] As Figure 1 、 Figure 5 and Figure 7As shown, in some alternative embodiments, the third joint arm 13 includes a connecting section 133 and a rotating section 132. The connecting section 133 is rotatably connected to the other end of the second joint arm 12. The rotating section 132 is rotatably connected to the connecting section 133. The unlocking assembly 3 and the pushing assembly 5 are both provided on the rotating section 132. The rotating section 132 can be rotated to switch between using the unlocking assembly 3 or the pushing assembly 5.

[0073] In this embodiment, the structure of the third joint arm 13 is specifically described. The third joint arm 13 includes a connecting section 133 and a rotating section 132. Among them, the connecting section 133 is rotatably connected to the other end of the second joint arm 12. The rotating section 132 is rotatably connected to the connecting section 133. The unlocking assembly 3 and the pushing assembly 5 are both provided on the rotating section 132. The plane where the unlocking assembly 3 is located when moving is different from the plane where the pushing assembly 5 itself is located. The rotating section 132 can be rotated to switch between using the unlocking assembly 3 or the pushing assembly 5, preventing interference between the unlocking assembly 3 and the pushing assembly 5 during use and making the device for the durability test of the opening and closing of the vehicle rear door have a better effect during use.

[0074] In this example, the mounting bracket 51 has a rectangular frame structure, and the length direction of the mounting bracket 51 is perpendicular to the axial direction of the mounting shaft 131. By rotating the rotating section 132, the pushing head 52 can protrude more from the third joint arm 13, facilitating the pushing of the rear door 2.

[0075] In this example, the plane where the unlocking assembly 3 is located when moving is perpendicular to the plane where the pushing assembly 5 itself is located.

[0076] As Figure 1 shown, in some alternative embodiments, a base 14 is provided at the other end of the first joint arm 11. The first joint arm 11 is rotatably connected to the base 14.

[0077] In this embodiment, a base 14 is provided at the other end of the first joint arm 11. The first joint arm 11 is rotatably connected to the base 14. The first joint arm 11 is arranged on a plane through the base 14. Since the first joint arm 11 is rotatably connected to the base 14, the extending directions of the second joint arm 12 and the third joint arm 13 can be changed, improving the applicability of the device for the durability test of the opening and closing of the vehicle rear door.

[0078] In this example, the first joint arm 11 is movably connected to the base 14. The first joint arm 11 can be inclined to the plane where the base 14 is located to more smoothly complete the action of closing the rear door 2 and keep the position where the pushing head 52 abuts against the rear door 2 unchanged. The first joint arm 11 can also move in the vertical direction to adjust the length extending from the base 14.

[0079] As Figure 1As shown, in some alternative embodiments, a door detection unit 6 is further included. The door detection unit 6 is disposed on the door pushing mechanism 4 and is used to detect whether the rear door 2 is closed.

[0080] In this embodiment, the device for the durability test of the opening and closing of the vehicle rear door further includes a door detection unit 6. The door detection unit 6 is disposed on the door pushing mechanism 4 and is used to detect whether the rear door 2 is closed, so as to determine whether the action of closing the rear door 2 is completed, and make the device for the durability test of the opening and closing of the vehicle rear door achieve better durability test results.

[0081] As Figures 1 - 8 shown, on the other hand, the present application also provides a method for the durability test of the opening and closing of a vehicle rear door, which is implemented by using the above-mentioned device for the durability test of the opening and closing of a vehicle rear door, and includes the following steps:

[0082] S1: Select the rear door 2 to be tested, set the robotic arm mechanism 1 outside the rear door 2, and set the door pushing mechanism 4 inside the rear door 2.

[0083] In this example, select the rear door 2 to be tested. Generally, one rear door 2 is selected for testing for each vehicle model. The number of test times is set as: 100,000 - 200,000 opening and closing cycles (set according to different vehicle models); the ambient temperature is in the range of 0 - 40 °C, generally at room temperature.

[0084] In this example, after setting the door pushing mechanism 4 inside the rear door 2, it is judged whether the rear door 2 is in the closed state through the door detection unit 6 to ensure the successful progress of the test.

[0085] S2: The robotic arm mechanism 1 moves to unlock the rear door 2 through the unlocking component 3, and after unlocking, the robotic arm mechanism 1 returns to the initial position.

[0086] In this example, step S2 specifically includes:

[0087] S21: The third joint arm 13 of the robotic arm mechanism 1 descends to the first set position at the first set speed;

[0088] S22: The telescopic rod 33 contracts to drive the second movable rod 32 to move, so that the pulling head 321 at the end of the rod extends to the switch of the rear door 2, and then the telescopic rod 33 extends to drive the second movable rod 32 to move, so that the pulling head 321 at the end of the rod retracts to open the switch of the rear door 2;

[0089] S23: The third joint arm 13 of the robotic arm mechanism 1 ascends to the initial position.

[0090] In this example, the first set speed is set according to the technical parameters of the robotic arm mechanism 1, and the first set position is the position where the pulling head 321 can contact the switch of the rear door 2.

[0091] S3: The door pushing mechanism 4 pushes the unlocked rear door 2 to open the rear door 2.

[0092] S4: The robotic arm mechanism 1 moves to close the rear door 2 through the pushing component 5.

[0093] In this example, step S4 specifically includes:

[0094] S41: The second joint arm 12 of the robotic arm mechanism 1 moves to the second set position;

[0095] S42: The rotating section 132 rotates 90°, switches to use the pushing component 5, so that the running trajectories of the pushing component 5 and the rear door 2 are in the same plane;

[0096] S43: The third joint arm 13 of the robotic arm mechanism 1 descends to the third set position at the second set speed;

[0097] S44: The third joint arm 13 of the robotic arm mechanism 1 descends to the fourth set position at the third set speed.

[0098] In this example, the second set speed is set according to the technical parameters of the robotic arm mechanism 1, the third set speed is generally 1.3 m / s, and at the same time, the simulation test of the extreme working conditions is also included in the test process. For example, selecting a speed of 3.0 m / s can simulate the special situation where a person uses their foot to push the rear door 2 and the door falls rapidly. The second set position is that the second joint arm 12 is lifted by a set height to ensure that the pushing component 5 can be aligned with the closing position on the rear door 2, and the closing position is the conventional position where a person closes the rear door 2 by hand. The third set position is the position where the pushing head 52 contacts the rear door 2. The fourth set position is the position where the pushing head 52 pushes the rear door 2 to close, and the fourth set position is the same as the first set position.

[0099] S5: The robotic arm mechanism 1 resets, and the test times record is incremented by one.

[0100] S6: Repeat steps S2 - S5. When the test times reach the set times, stop the test.

[0101] S7: Evaluate the test results and record the data.

[0102] In this example, the durability evaluation of the rear door 2 is actually multi-dimensional, and these indicators also need to be recorded to guide the subsequent design adjustment of the rear door 2.

[0103] In the first aspect, specifically, the evaluation indicators include: whether the rear door is closed; the static opening and closing forces; the door opening degree, the door settlement, whether the outer covering of the rear door sheet metal is deformed; whether the body reinforcement plate (such as the rib plate) is broken; whether the elasticity of the sealing strip at the door is effective; whether the connecting parts (bolts and nuts) are loose, etc.

[0104] In the actual test process, a single evaluation indicator can be tested one by one. However, if it is found during the test that a certain indicator is already unqualified, for example, the body reinforcement plate has broken or the rear door is not closed, then the test will stop directly. Targeted parameter optimization will be carried out for the existing situation, and then the test will be carried out again.

[0105] In the second aspect, the data recording during the test process will also guide the parameter adjustment of the door. Specifically, for example, if the current door reinforcement plate is a double-layer structure, by recording when the reinforcement layer breaks, the number of layers or the material of the plate can be appropriately increased, etc., to ensure the strength of the rear door.

[0106] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0107] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0108] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for the opening and closing durability test of a vehicle rear door, characterized in that, it includes: A robotic arm mechanism (1) for being arranged outside the rear door (2); An unlocking assembly (3) arranged on the robotic arm mechanism (1) for unlocking the rear door (2); A door pushing mechanism (4) for being arranged inside the rear door (2) to open the unlocked rear door (2); A pushing assembly (5) arranged on the robotic arm mechanism (1) for moving along with the robotic arm mechanism (1) and abutting against the outside of the rear door (2) to drive the closing of the rear door (2); The unlocking assembly (3) includes: A fixing unit arranged on the robotic arm mechanism (1); A first movable rod (31) with one end movably connected to the fixing unit; A second movable rod (32) including a rod portion and a pulling head (321) arranged at the end of the rod portion, the rod portion being movably connected to the other end of the first movable rod (31), and the pulling head (321) being used for switch connection with the rear door (2); A telescopic rod (33) with a fixed end connected to the robotic arm mechanism (1) and a telescopic end movably connected to the end of the rod portion away from the pulling head (321), the telescopic rod (33) being used to drive the first movable rod (31) and the second movable rod (32) to move so that the pulling head (321) is in switch connection with the rear door (2); The fixing unit includes: A fixing plate (34) arranged on the robotic arm mechanism (1); A fixing rod (35) with one end connected to the fixing plate (34) and the other end movably connected to the first movable rod (31); The robotic arm mechanism (1) includes a first joint arm (11), a second joint arm (12) and a third joint arm (13) connected in sequence. The first joint arm (11) is arranged in the vertical direction. One end of the first joint arm (11) is rotatably connected to one end of the second joint arm (12). The second joint arm (12) can rotate around the connection point with the first joint arm (11) in the vertical plane. The third joint arm (13) is rotatably connected to the other end of the second joint arm (12). The third joint arm (13) can rotate around the connection point with the second joint arm (12) in the vertical plane. The unlocking assembly (3) and the pushing assembly (5) are arranged on the third joint arm (13); The third joint arm (13) includes a connecting section (133) and a rotating section (132). The connecting section (133) is rotatably connected to the other end of the second joint arm (12). The rotating section (132) is rotationally connected to the connecting section (133). The unlocking assembly (3) and the pushing assembly (5) are both arranged on the rotating section (132). The rotating section (132) can be rotated to switch the use of the unlocking assembly (3) or the pushing assembly (5).

2. The device for the opening and closing durability test of a vehicle rear door according to claim 1, characterized in that, The pushing assembly (5) includes: Mounting bracket (51), which is arranged on the robotic arm mechanism (1); Pushing head (52), which is arranged at the end of the mounting bracket (51), and the thickness of the pushing head (52) is greater than the thickness of the mounting bracket (51), and the pushing head (52) is used to abut against the rear door (2).

3. A device for durability test of opening and closing of a vehicle rear door according to claim 2, characterized in that a mounting shaft (131) is provided on the robotic arm mechanism (1), and the pushing assembly (5) further includes a mounting shaft sleeve (53), and the mounting shaft sleeve (53) is sleeved on the mounting shaft (131).

4. A device for durability test of opening and closing of a vehicle rear door according to claim 1, characterized in that a base (14) is provided at the other end of the first articulated arm (11), and the first articulated arm (11) is rotatably connected to the base (14).

5. A device for durability test of opening and closing of a vehicle rear door according to claim 1, characterized in that it further includes a door detection unit (6), and the door detection unit (6) is arranged on the door pushing mechanism (4) for detecting whether the rear door (2) is closed.

6. A method for durability test of opening and closing of a vehicle rear door, characterized in that it is implemented by using a device for durability test of opening and closing of a vehicle rear door according to any one of claims 1-5, and includes the following steps: Select the rear door (2) to be tested, arrange the robotic arm mechanism (1) outside the rear door (2), and arrange the door pushing mechanism (4) inside the rear door (2); The robotic arm mechanism (1) moves, unlocks the rear door (2) through the unlocking assembly (3), and after unlocking, the robotic arm mechanism (1) returns to the initial position; The door pushing mechanism (4) pushes the unlocked rear door (2) to open the rear door (2); The robotic arm mechanism (1) moves, and closes the rear door (2) through the pushing assembly (5).

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