Flexible leg automatic pendulum bob calibration device and method

Abstract

The invention belongs to the technical field of automobile pedestrian protection tests, and particularly relates to a flexible leg automatic pendulum bob calibration device and method.The flexible leg automatic pendulum bob calibration device comprises a rack module, a pendulum bob impact stop block module, a conductive module, an electromagnetic clutch module and a winch module, the pendulum bob impact stop block module is arranged on the rack module, and the conductive module is arranged on the rack module; the electromagnetic clutch module is connected with the lower end of the flexible leg and releases the flexible leg after being electrified, and the winch module is arranged on the rack module, is connected with the electromagnetic clutch module through a traction rope and is used for pulling the electromagnetic clutch module to ascend and descend, so that the electromagnetic clutch module is electrically connected with the conductive module when ascending. By means of the electric conduction module, the electromagnetic lock does not need permanent electric wire connection, electricity is supplied to the electromagnetic lock through the electric conduction module only when the electromagnetic lock needs to be unlocked, therefore, electric wire connection is not needed in the process that the electromagnetic lock descends and the flexible leg is pulled to ascend, only one pulling rope is used for pulling, and the structure of the winch module is greatly simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive pedestrian protection tests, and particularly relates to a flexible leg automatic pendulum calibration device and method. Background Technique

[0002] To better evaluate the collision protection performance of automobiles for pedestrians, mainstream lower leg impactors such as the flexible leg Flex-PLI and the advanced leg aPLI are used to simulate the process of the front of the automobile impacting the real human lower leg. Regulations such as the 2021 version of C-NCAP (China New Car Assessment Program), GB / T 24550-2009 "Collision Protection of Motor Vehicles for Pedestrians", and UN R127 "Uniform Provisions on the Certification of the Collision Safety Protection Performance of Motor Vehicles for Pedestrians" clearly state that static and dynamic calibration tests need to be carried out according to the existing impact test times of the lower leg impactor, the actual service life, and whether the channel signal amplitude status is abnormal. Among them, pendulum calibration is an important calibration method for dynamic calibration. Especially for the flexible leg Flex-PLI, the position, attitude, and passing criteria of the pendulum calibration are clearly defined.

[0003] Chinese Patent with publication number CN114964814B discloses a leg type dynamic calibration device and method. In this device, the Flex-PLI leg type is suspended by a leg type tightening clutch device, and the Flex-PLI leg type is released by the clutch, so that the Flex-PLI leg type swings naturally under the action of gravity and impacts the pendulum impact block. There are various sensors and data acquisition systems inside the Flex-PLI leg type, and various data information inside it can be obtained after the collision, so as to judge whether the Flex-PLI leg type meets the requirements of automotive pedestrian protection tests. This device has the following problems: The electromagnetic lock in the leg type tightening clutch device needs to be continuously powered, and it is always connected to the wire. In this way, the electromagnetic lock needs to rise and fall with the flexible leg, resulting in troublesome fixing of the wire and potential risks of accidental damage to the wire. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution for a flexible leg automatic pendulum calibration device and method.

[0005] A flexible leg automatic pendulum calibration device includes: A frame module; A pendulum impact block module, which is arranged on the frame module and is used to bear the impact of the flexible leg; A conductive module, which is arranged on the frame module; An electromagnetic clutch module, which is connected to the lower end of the flexible leg and releases the flexible leg after being energized; and The winch module is arranged on the frame module and is connected to the electromagnetic clutch module through a traction rope, used to tow the electromagnetic clutch module to lift, so that when the electromagnetic clutch module rises, it can achieve electrical connection with the conductive module.

[0006] Further, the electromagnetic clutch module includes a housing, on which an electromagnetic lock mechanism and a first conductive mechanism are arranged. The electromagnetic lock mechanism is used to connect with the flexible leg, and the first conductive mechanism is used to receive electricity from the conductive module and transmit it to the electromagnetic lock mechanism; The electromagnetic lock mechanism includes an electromagnetic lock hook, an electromagnetic lock lever, an electromagnetic lock pull rod and an electromagnet. The electromagnetic lock hook is used to hook the flexible leg, and the electromagnetic lock lever is used to engage with the electromagnetic lock hook to prevent the electromagnetic lock hook from rotating downward. The electromagnetic lock pull rod is connected to the electromagnetic lock lever. When it is attracted by the magnetic force of the electromagnet, it drives the electromagnetic lock lever to rotate, so that the electromagnetic lock lever is separated from the electromagnetic lock hook, and then the electromagnetic lock hook rotates downward under the action of elastic force and / or the gravity of the flexible leg, thereby releasing the flexible leg.

[0007] Further, the electromagnetic lock mechanism includes a first elastic unit and a second elastic unit. The first elastic unit pushes or pulls the electromagnetic lock hook in the direction of opening the electromagnetic lock mechanism, and the second elastic unit is used to reset the electromagnetic lock pull rod.

[0008] Further, the electromagnetic lock lever is rotatably arranged. Its first end is connected to the electromagnetic lock pull rod, and its second end is connected to the electromagnetic lock hook. When it rotates, the linear velocity of its first end is greater than that of the second end.

[0009] Further, the traction rope passes through the conductive module, which includes a conductive bracket, a guide block arranged on the conductive bracket, a guide rod slidably matched with the guide block, a second conductive mechanism arranged at one end of the guide rod, and a third elastic unit. The second conductive mechanism is used to supply power to the electromagnetic clutch module, and the third elastic unit pushes or pulls the second conductive mechanism in the direction away from the guide block.

[0010] Further, the conductive module further includes a sensing component, which is used to detect whether the electromagnetic clutch module rises in place.

[0011] Further, the guide block is rotatably connected to the conductive bracket through a rotating shaft, and a pulley is arranged on the rotating shaft, and the pulley is used to provide a direction change for the traction rope.

[0012] Further, the upper end of the flexible leg is rotatably connected to the frame module, its lower end is connected to the electromagnetic clutch module, and a counterweight is arranged on the flexible leg.

[0013] Further, the winch module includes a winch wheel, a wire pressing mechanism, and a winch motor. The winch wheel is used to wind the towing rope, the winch motor is used to drive the winch wheel to rotate, and the wire pressing mechanism is arranged on one side of the winch wheel to limit the towing rope on the winch wheel so that the towing rope will not spread out.

[0014] The present invention also provides a method for automatically calibrating the flexible leg pendulum, including: Step 1: Rotationally connect the upper end of the flexible leg to the frame module, and connect the lower end of the flexible leg to the electromagnetic clutch module; Step 2: Drive the electromagnetic clutch module to move upward through the winch module, and the electromagnetic clutch module drives the flexible leg to swing upward; Step 3: When the flexible leg swings upward in place, the electromagnetic clutch module rises to the position where it contacts the conductive module and takes power from the conductive module, so that the electromagnetic clutch module releases the flexible leg, and the flexible leg swings downward due to gravity and impacts the pendulum impact stop block module; Step 4: There are detection sensors and a data acquisition system inside the flexible leg. After the collision, various data information inside it can be obtained, which is convenient for judging whether the flexible leg meets the requirements of the vehicle's pedestrian collision protection test.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1) It can perform dynamic calibration of the flexible leg Flex-PLI pendulum impact; 2) The pendulum calibration device has a complete structure and appropriate overall dimensions. It is convenient to install the flexible leg Flex-PLI, lift the flexible leg Flex-PLI, and release the flexible leg Flex-PLI. Moreover, its operating height is appropriate, which is convenient, fast, and reduces the test intensity; 3) It can quickly and effectively adjust the position and attitude of the flexible leg Flex-PLI, ensure that the position and attitude parameters of the flexible leg Flex-PLI meet the calibration requirements, and ensure the consistency of the initial state and the reliability of the test results; 4) According to the calibration method required by the regulations, it can achieve high-precision and high-efficiency dynamic calibration of the pendulum impact, and the result has a high credibility; 5) The electromagnet lever ensures that the electromagnet can still be unlocked smoothly when hanging heavy objects; 6) The conductive module enables the electromagnetic lock not to require a permanent wire connection, but only supplies power to the electromagnetic lock through the conductive module when the electromagnetic lock needs to be unlocked. Thus, the electromagnetic lock does not require a wire connection during the descent and the process of towing the flexible leg upward, but is only towed by a towing rope, which greatly simplifies the structure of the winch module (no need to retract the wires of the electromagnetic lock); at the same time, the guide block can rotate around the axis, so that the electromagnetic lock always maintains two parallel surfaces in contact when contacting the contact point, improving the reliability of the conduction of the electromagnet opening current. Description of the Drawings

[0016] Figure 1 This is one of the schematic structural diagrams of a flexible leg automatic pendulum calibration device of the present invention. In the figure, the flexible leg is in the state before hoisting; Figure 2 This is another schematic structural diagram of a flexible leg automatic pendulum calibration device of the present invention. In the figure, the flexible leg is in the state before hoisting; Figure 3 This is the third schematic structural diagram of a flexible leg automatic pendulum calibration device of the present invention. In the figure, the flexible leg is in the state before release after hoisting; Figure 4 This is the fourth schematic structural diagram of a flexible leg automatic pendulum calibration device of the present invention. In the figure, the flexible leg is in the state before release after hoisting; Figure 5 This is the fifth schematic structural diagram of a flexible leg automatic pendulum calibration device of the present invention. In the figure, the flexible leg is in the state after release; Figure 6 This is the schematic structural diagram of the conductive module in a flexible leg automatic pendulum calibration device of the present invention; Figure 7 This is the external schematic structural diagram of the electromagnetic clutch module in a flexible leg automatic pendulum calibration device of the present invention; Figure 8 This is the internal schematic structural diagram of the electromagnetic clutch module in a flexible leg automatic pendulum calibration device of the present invention; Figure 9 This is the exploded schematic structural diagram of the electromagnetic clutch module in a flexible leg automatic pendulum calibration device of the present invention; Figure 10 This is the schematic structural diagram of the pendulum impact stopper module in a flexible leg automatic pendulum calibration device of the present invention; Figure 11 This is the schematic structural diagram of the winch module in a flexible leg automatic pendulum calibration device of the present invention; Figure 12 This is the flow chart of a flexible leg automatic pendulum calibration method of the present invention.

[0017] In the figure: frame module 1, main frame 100, pendulum frame 101, pendulum impact block module 2, block 200, handle bolt 201, conductive module 3, conductive bracket 300, guide block 301, guide rod 302, third elastic unit 303, in-place sensor 304, sensor trigger 305, rotating shaft 306, pulley 307, guide rod fixing block 308, contact cover plate 309, positive contact 310, negative contact 311, sensor fixing groove 312, electromagnetic clutch module 4, electromagnetic lock hook 401, electromagnetic lock lever 402, electromagnetic lock pull rod 403, electromagnet 404, first elastic unit 405, electromagnetic lock cover plate 406, insulating block 407, positive conductive ring 408, negative conductive ring 409, winch module 5, towing rope 500, winch wheel 501, wire pressing mechanism 502, winch motor 503, motor fixing plate 504, coupling 505, winch shaft 506, bearing seat 507, bearing seat fixing plate 508, wire rope locking block 509, press wheel shaft 510, compression spring 511, support base plate 512, hexagon head screw 513, flexible leg 6, counterweight 600, lifting ring 601. Detailed implementation manners

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end portion", "length", "outer end", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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, and thus should not be construed as a limitation to the present invention.

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Please refer to Figures 1 - 11 , a flexible leg automatic pendulum calibration device, comprising a frame module 1, a pendulum impact block module 2, a conductive module 3, an electromagnetic clutch module 4 and a winch module 5. The pendulum impact block module 2 is arranged on the frame module 1 and is used to bear the impact of the flexible leg 6. The conductive module 3 is arranged on the frame module 1. The electromagnetic clutch module 4 is connected to the lower end of the flexible leg 6 and releases the flexible leg 6 after being powered on. The winch module 5 is arranged on the frame module 1 and is connected to the electromagnetic clutch module 4 through a towing rope 500 to tow the electromagnetic clutch module 4 to lift and lower, so that when the electromagnetic clutch module 4 rises, it realizes electrical connection with the conductive module 3.

[0021] Continue to refer to Figures 1 - 5, the frame module 1 includes a main frame 100 and a pendulum frame 101. The pendulum impact block module 2 is installed on the front side of the main frame 100, and the winch module 5 is installed on the top of the pendulum frame 101. The pendulum frame 101 has a cantilever extending forward, and the conductive module 3 is installed at the front end of the cantilever. A hinge seat is installed at the rear end of the cantilever, and the upper end of the flexible leg 6 is hinged to the hinge seat.

[0022] Continue to refer to Figures 7 - 9 , the electromagnetic clutch module 4 includes a housing 400. An electromagnetic lock mechanism and a first conductive mechanism are arranged in the housing 400. The electromagnetic lock mechanism is used to connect with the flexible leg 6, and the first conductive mechanism is used to receive electricity from the conductive module 3 and conduct it to the electromagnetic lock mechanism.

[0023] Further refer to Figure 8 and Figure 9 , the electromagnetic lock mechanism includes an electromagnetic lock cover plate 406, an electromagnetic lock hook 401, an elastic component, an electromagnetic lock lever 402, an electromagnetic lock pull rod 403, an electromagnet 404, a first elastic unit 405 and a second elastic unit. There are two electromagnetic lock cover plates 406, and the two electromagnetic lock cover plates 406 are connected by fasteners to form a housing for the electromagnetic lock hook 401 and the first elastic unit 405. The electromagnetic lock hook 401 is rotatably installed in the housing. The first elastic unit 405 is preferably a torsion spring, one end of which is connected to the electromagnetic lock hook 401, and the other end is connected to the inner wall of the housing. The first elastic unit 405 pushes or pulls the electromagnetic lock hook 401 in the direction to open the electromagnetic lock mechanism. The electromagnet 404 is fixedly installed in the housing 400. The electromagnetic lock pull rod 403 is slidably fitted in the housing 400. The second elastic unit is a spring sleeved on the electromagnetic lock pull rod 403, which pushes the electromagnetic lock pull rod 403 in the direction away from the electromagnet 404. The electromagnetic lock pull rod 403 can form a telescopic movement relative to the electromagnet under the action of power on and off. There is an opening on one side of the housing 400 to facilitate manual operation of the electromagnetic lock pull rod 403. There is a through hole in the middle of the electromagnetic lock pull rod 403. The electromagnetic lock lever 402 is rotatably installed with the housing. The length of the electromagnetic lock lever 402 of the present invention is relatively large. Its first end is inserted into the through hole of the electromagnetic lock pull rod 403, and its second end is clamped with the electromagnetic lock hook 401, so that the electromagnetic lock hook 401 cannot rotate downward. The rotation center of the electromagnetic lock lever 402 is closer to the second end. Therefore, when the electromagnetic lock lever 402 rotates, the linear velocity of its first end is greater than that of the second end. The electromagnetic lock hook 401 is rotatably connected to the housing and has a locking groove, which is hooked with a hanging ring 601 on the flexible leg 6 through the locking groove. One end of the housing 600 has a notch for the hanging ring 601 to extend into and cooperate with the electromagnetic lock hook 401.

[0024] The setting of the above opening makes the electromagnetic lock pull rod 403 pass through the opening and expose a certain distance, which is convenient for the electromagnetic lock pull rod 403 to be manually unlocked.

[0025] Further refer to Figure 7and Figure 9 The first conductive mechanism includes an insulating block 407, a positive conductive ring 408, and a negative conductive ring 409. The insulating block 407 is fixedly installed on the end of the shell 600 facing away from the electromagnetic lock hook 401. The positive conductive ring 408 and the negative conductive ring 409 are respectively embedded in the two annular grooves of the insulating block 407. The positive conductive ring 408 and the negative conductive ring 409 are electrically connected to the electromagnet 404.

[0026] When the electromagnetic clutch module 4 is in operation, after the first conductive mechanism is energized and transmits current to the electromagnet 404, the electromagnetic lock lever 403 is attracted by the magnetic force of the electromagnet 404 and moves toward the electromagnet 404, driving the electromagnetic lock lever 402 to rotate. The electromagnetic lock lever 402 no longer blocks the electromagnetic lock hook 401. The electromagnetic lock hook 401, under the weight of the flexible leg 6 and the elastic force of the first elastic unit 405, rotates the locking slot of the electromagnetic lock hook 401 downward, disengaging the ring 601 and releasing the flexible leg 6. After the first conductive mechanism is de-energized, the second elastic unit drives the electromagnetic lock lever 403 to reset. The electromagnetic lock hook 401 is reset by pushing the lifting ring 601 into the electromagnetic lock mechanism during the next test. The top of the lifting ring 601 presses against the longer end of the electromagnetic lock hook 401 to rotate the electromagnetic lock hook 401. During the upward rotation of the electromagnetic lock hook 401, the front end is arc-shaped, and the arc-shaped pushes the electromagnetic lock lever 402 to rotate clockwise by a certain angle. After the electromagnetic lock hook 401 is pushed into place, the electromagnetic lock lever 402 rotates counterclockwise under the action of the second elastic unit to jam the electromagnetic lock hook 401. From then on, the reset of the electromagnetic lock hook 401 is completed.

[0027] Since the linear velocity of the first end of the electromagnetic lock lever 402 is greater than the linear velocity of the second end when the electromagnetic lock lever 402 rotates, the second end of the electromagnetic lock lever 402 can bring greater torque to the electromagnetic lock hook 401 when unlocking, making the unlocking smoother. Figure 8 As shown, the flexible leg 6 and the counterweight 600 are heavy. When the electromagnetic lock hook 401 is stuck by the electromagnetic lock lever 402, the friction between the electromagnetic lock hook 401 and the electromagnetic lock lever 402 is very large. If there is no such large torque, the power of the electromagnet 404 cannot easily drive the electromagnetic lock rod 403 to move, resulting in the entire electromagnetic lock mechanism not taking any action after the electromagnet 404 is energized.

[0028] Continue reading Figure 6 The conductive module 3 includes a conductive bracket 300, a guide block 301 arranged on the conductive bracket 300, a guide rod 302 slidingly engaged with the guide block 301, a second conductive mechanism arranged at one end of the guide rod 302, and a third elastic unit 303. The second conductive mechanism is used to conduct electricity for the electromagnetic clutch module 4. The third elastic unit 303 is preferably a spring, which is sleeved on the guide rod 302 and located between the guide block 301 and the second conductive mechanism, pushing the second conductive mechanism in a direction away from the guide block 301.

[0029] Further refer to Figure 6 , the guiding block 301 is rotatably connected to the conductive bracket 300 through a rotating shaft 306. A pulley 307 is arranged on the rotating shaft 306. The pulley 307 is used to provide a direction change for the traction rope 500. The gap between the outer diameter of the pulley 307 and the guiding block 301 is smaller than the diameter of the traction rope 500, preventing the traction rope 500 from running off the pulley 307 in a non-tensioned state.

[0030] Among them, the guiding block 301 can rotate around the rotating shaft 306. The advantage of such a setting is that the bottom surface of the contact cover plate 309 can be perpendicular to the traction rope 500, so that the contact cover plate 309 is always parallel to the first conductive mechanism, thereby ensuring the reliability of the connection between the first conductive mechanism and the second conductive mechanism.

[0031] Further refer to Figure 6 , the second conductive mechanism includes a guide rod fixing block 308, a contact cover plate 309, a PCB board, a positive contact 310, and a negative contact 311. The contact cover plate 309 is made of a non-metallic material. One end of it is fixedly connected to the guide rod fixing block 308, and a PCB board is arranged between the two. Four positive contacts 310 are welded at four positions on the outer ring of the PCB board, and four negative contacts 311 are welded at four positions on the inner ring. The positive contacts 310 and the negative contacts 311 slightly protrude from the surface of the contact cover plate 309. The guide rod fixing block 308 is fixedly connected to the guide rod 302 and the sensor trigger 305. The contact cover plate 309 and the guide rod fixing block 308 are provided with through holes for the traction rope 500 to pass through. After the traction rope 500 passes through the contact cover plate 309 and the guide rod fixing block 308, it is connected to the electromagnetic clutch module 4. The positive contact 310 and the negative contact 311 can act on the positive conductive ring 408 and the negative conductive ring 409 of the electromagnetic clutch module 4 respectively, converting the power supply at the fixed end into the power supply at the mobile end, and solving the problem of power supply for the mobile end.

[0032] The main function of the above-mentioned third elastic unit 303 is to provide sufficient pressure between the first conductive mechanism and the second conductive mechanism, so as to ensure that the positive contact 310 and the negative contact 311 can be smoothly conducted with the electromagnet 404. Without the third elastic unit 303, the second conductive mechanism can only contact the first conductive mechanism by gravity, and the conduction is not reliable enough.

[0033] Further refer to Figure 6, the conductive module 3 further includes a sensing component for detecting whether the electromagnetic clutch module 4 has risen to the proper position. The sensing component includes a position sensor 304 and a sensor trigger 305 for triggering the position sensor 304. The position sensor 304 is preferably a U-shaped photoelectric sensor, which is installed on the second conductive mechanism. The position sensor 304 is installed on the guide block 301 through a sensor fixing groove 312. The position sensor 304 fixes its position on the sensor fixing groove 312 by bolts. Loosening the bolts can adjust the position of the position sensor 304. According to the adjustment requirements of the suspension angle of the flexible leg Flex-PLI, it is adjusted on the sensor fixing groove 312 of the position sensor 304, thereby obtaining an ideal angle value, that is, ensuring the consistency of the initial state of the flexible leg Flex-PLI and the reliability of the final test results. In addition, the installation positions of the position sensor 304 and the sensor trigger 305 can be interchanged.

[0034] When the electromagnetic clutch module 4 rises and contacts the contact cover plate 309, it drives the sensor trigger 305 to rise together. The sensor trigger 305 triggers the position sensor 304, and the position sensor 304 sends a stop signal to the motor in the winch module 5 to stop the winch module 5 from pulling the electromagnetic clutch module 4. By adjusting the position of the position sensor 304, the lifting height of the electromagnetic clutch module 4 can be adjusted, thereby changing the initial angle of the flexible leg 6.

[0035] Continue to refer to Figures 1 - 5 , the towing rope 500 of the winch module 5 is preferably a steel wire rope. When the winch module 5 drives the electromagnetic clutch module 4 to move upward through the towing rope 500 and hits the contact cover plate 309 of the conductive module 3, the electromagnetic clutch module 4 will drive the second conductive mechanism together with the guide rod 302 to move upward along the sliding hole of the guide block 301, and the third elastic unit 303 pushes the guide rod fixing block 308 in the direction away from the guide block 301. The positive contact 310 and the negative contact 311 of the second conductive mechanism are respectively in contact with the positive conductive ring 408 and the negative conductive ring 409 in the first conductive mechanism to supply power to the electromagnetic clutch module 4.

[0036] Continue to refer to Figure 10 , the pendulum impact block module 2 includes a block 200 and a handle bolt 201. The block 200 is locked to the main frame 100 through the handle bolt 201. The structure of the pendulum impact block module 2 is a well-known technology, and specific reference can be made to the patent CN114964814B.

[0037] Continue to refer to Figure 11, the winch module 5 includes a wire pressing mechanism 502, a winch motor 503, a motor fixing plate 504, a coupling 505, a winch shaft 506, a bearing seat 507, a bearing seat fixing plate 508, a winch wheel 501 with a spiral groove, a wire rope locking block 509, a pressure wheel shaft 510, a compression spring 511, and a support base plate 512. The winch motor 503 is a servo motor, and the wire pressing mechanism 502 is a pressure wheel. The motor fixing plate 504 and the bearing seat fixing plate 508 are fixed on the support base plate 512. The servo motor is connected to the motor fixing plate 504 and is connected to the coupling 505 through the servo motor main shaft. The other end of the coupling 505 is connected to the winch shaft 506. The winch shaft 506 is provided with a keyway, which is matched with the keyway on the winch wheel 501 through a key to transmit torque, and finally realizes the suspension of the flexible leg 6. A traction rope 500 is wound around the winch wheel 501. The starting end of the traction rope 500 is pressed tightly by the wire rope locking block 509, and the other end is fixed to the electromagnetic clutch module 4 after passing through the small hole on the conductive module 3, realizing the suspension of the flexible leg 6. The bearing seat 507 is fixed on the bearing seat fixing plate 508, playing a role in rotating and supporting the winch shaft 506. The pressure wheel shaft 510 is sleeved on the pressure wheel 502. Light holes are opened at both ends of the pressure wheel shaft 510. The hexagon head screws 513 are first sleeved into the compression spring 511 and then passed through the light holes on the pressure wheel shaft 510, and finally fixed on the bearing seat fixing plates 508 on both sides, realizing a certain binding force of the pressure wheel on the traction rope 500 wound around the winch wheel 501, ensuring that the traction rope 500 is stably coiled in the spiral groove of the winch wheel 501 during the retraction and release states, and ensuring that the traction rope 500 will not spread on the winch wheel 501 in the non-tension state.

[0038] Continue to refer to Figures 1 - 5 , there is a detection sensor and a data acquisition system inside the flexible leg 6. The upper end of the flexible leg 6 is hinged to the frame module 1, and a counterweight 600 is arranged at its lower end. A lifting ring 601 is arranged on the counterweight 600, and the lifting ring 601 is connected to the electromagnetic clutch module 4.

[0039] In addition, the flexible leg automatic pendulum calibration device of the present invention is also equipped with a power supply, a control system, a rising switch, a falling switch, and a power-on switch. The control system is electrically connected to the three switches and each electric control component respectively. Press the rising switch, and the winch module 5 winds the rope to drive the flexible leg to swing upward. Press the falling switch, and the winch module 5 pays out the rope. Press the power-on switch, and the conductive module 3 supplies power to the electromagnetic clutch module 4.

[0040] Please refer to Figures 1 - 12 , a flexible leg automatic pendulum calibration method includes the following steps: Step 1, as shown in Figure 1 and Figure 2 , rotatably connect the upper end of the flexible leg 6 to the frame module 1, and connect the lifting ring 601 at the lower end of the flexible leg 6 to the electromagnetic lock hook 401 of the electromagnetic clutch module 4.

[0041] Step 2, as Figure 3 and Figure 4 shown, drive the electromagnetic clutch module 4 to move upward by the winch module 5, and the electromagnetic clutch module 4 drives the flexible leg 6 to swing upward.

[0042] Step 3, as Figure 3 and Figure 4 shown, when the flexible leg 6 rises in place and the electromagnetic clutch module 4 rises to the position in contact with the conductive module 3, at this time, the positive contact 310 and the negative contact 311 of the second conductive mechanism are respectively in contact with the positive conductive ring 408 and the negative conductive ring 409 in the first conductive mechanism, and the second conductive mechanism is conducted with the first conductive mechanism, but the power-on switch is still in the off state. The electromagnetic clutch module 4 will drive the second conductive mechanism and the guide rod 302 to continue to rise a certain distance, so that the in-place sensor 304 is triggered. The in-place sensor 304 transmits a signal to the control system, and the control system transmits a signal to the winch motor 503 to stop the winch motor 503. Then the staff uses instruments such as a protractor to confirm whether the angle of the flexible leg 6 meets the test requirements. After confirmation, the staff presses the power-on switch, and the power supply starts to supply power to the second conductive mechanism, so that the electromagnetic clutch module 4 can smoothly draw power from the conductive module 3. After being powered on, the electromagnetic clutch module 4 releases the flexible leg 6, and the flexible leg 6 swings downward due to gravity and impacts the pendulum impact block module 2.

[0043] Step 4, there are detection sensors and data acquisition systems inside the flexible leg 6. After the collision, various data information inside it can be obtained, which is convenient for judging whether the flexible leg 6 meets the requirements of the pedestrian collision protection test for automobiles.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible leg automatic pendulum calibration device, characterized in that, include: Rack Module (1); A pendulum impact block module (2), wherein the pendulum impact block module (2) is arranged on the frame module (1) and is used to withstand the impact of the flexible leg (6); A conductive module (3), wherein the conductive module (3) is arranged on the rack module (1); An electromagnetic clutch module (4), the electromagnetic clutch module (4) being connected to the lower end of the flexible leg (6) and releasing the flexible leg (6) when energized; and A hoist module (5) is provided on the frame module (1) and is connected to the electromagnetic clutch module (4) via a traction rope (500) for pulling the electromagnetic clutch module (4) up and down, so that the electromagnetic clutch module (4) is electrically connected to the conductive module (3) when it is raised.

2. The automatic pendulum calibration device for flexible legs according to claim 1, wherein, The electromagnetic clutch module (4) comprises a housing (400), an electromagnetic lock mechanism and a first conductive mechanism are provided on the housing (400), the electromagnetic lock mechanism is used to connect with the flexible leg (6), and the first conductive mechanism is used to receive electricity from the conductive module (3) and conduct it to the electromagnetic lock mechanism; The electromagnetic lock mechanism comprises an electromagnetic lock hook (401), an electromagnetic lock lever (402), an electromagnetic lock pull rod (403) and an electromagnet (404); the electromagnetic lock hook (401) is used to hook the flexible leg (6); the electromagnetic lock lever (402) is used to engage with the electromagnetic lock hook (401), so that the electromagnetic lock hook (401) cannot rotate downward; the electromagnetic lock pull rod (403) is connected to the electromagnetic lock lever (402); when attracted by the magnetic force of the electromagnet (404), the electromagnetic lock lever (403) drives the electromagnetic lock lever (402) to rotate, so that the electromagnetic lock lever (402) is separated from the electromagnetic lock hook (401), and then the electromagnetic lock hook (401) rotates downward under the action of elastic force and / or the gravity of the flexible leg (6), thereby releasing the flexible leg (6).

3. The flexible leg automatic pendulum calibration device according to claim 2, characterized in that: The electromagnetic lock mechanism comprises a first elastic unit (405) and a second elastic unit, wherein the first elastic unit (405) pushes or pulls the electromagnetic lock hook (401) in a direction to open the electromagnetic lock mechanism, and the second elastic unit is used to reset the electromagnetic lock pull rod (403).

4. The automatic pendulum calibration device for flexible legs according to claim 2, wherein, The electromagnetic lock lever (402) is rotatably arranged, with its first end connected to the electromagnetic lock pull rod (403) and its second end connected to the electromagnetic lock hook (401). When it rotates, the linear speed of its first end is greater than the linear speed of the second end.

5. The automatic pendulum calibrating device with flexible legs according to claim 1, wherein, The conductive module (3) is for the traction rope (500) to pass through, and comprises a conductive bracket (300), a guide block (301) arranged on the conductive bracket (300), a guide rod (302) slidingly engaged with the guide block (301), a second conductive mechanism arranged at one end of the guide rod (302), and a third elastic unit (303), wherein the second conductive mechanism is used to supply power to the electromagnetic clutch module (4), and the third elastic unit (303) pushes or pulls the second conductive mechanism in a direction away from the guide block (301).

6. The automatic pendulum calibrating device for flexible legs according to claim 5, wherein, The conductive module (3) further comprises a sensor component, and the sensor component is used to detect whether the electromagnetic clutch module (4) has risen into place.

7. The automatic pendulum calibrating device with flexible legs according to claim 5, wherein The guiding block (301) is rotatably connected to the conductive bracket (300) through a rotating shaft (306). A pulley (307) is arranged on the rotating shaft (306), and the pulley (307) is used to provide a direction change for the traction rope (500).

8. A flexible leg automatic pendulum calibration device according to claim 1, characterized in that, The upper end of the flexible leg (6) is rotatably connected to the frame module (1), and its lower end is connected to the electromagnetic clutch module (4). A counterweight block (600) is arranged on the flexible leg (6).

9. A flexible leg automatic pendulum calibration device according to claim 1, characterized in that The winch module (5) includes a winch wheel (501), a wire pressing mechanism (502) and a winch motor (503). The winch wheel (501) is used to wind the traction rope (500), the winch motor (503) is used to drive the winch wheel (501) to rotate, and the wire pressing mechanism (502) is arranged on one side of the winch wheel (501) and is used to limit the traction rope (500) on the winch wheel (501) so that the traction rope (500) will not spread out.

10. A calibration method for a flexible leg automatic pendulum, characterized in that, Including: Step 1: Rotatably connect the upper end of the flexible leg (6) to the frame module (1), and connect the lower end of the flexible leg (6) to the electromagnetic clutch module (4). Step 2: Drive the electromagnetic clutch module (4) to move upward through the winch module (5), and the electromagnetic clutch module (4) drives the flexible leg (6) to swing upward. Step 3: When the flexible leg (6) swings upward in place, the electromagnetic clutch module (4) rises to a position in contact with the conductive module (3) and takes power from the conductive module (3), so that the electromagnetic clutch module (4) releases the flexible leg (6), and the flexible leg (6) swings downward due to gravity and impacts the pendulum impact stop block module (2). Step 4: There are detection sensors and a data acquisition system inside the flexible leg (6). After the collision, various data information inside it can be obtained, which is convenient for judging whether the flexible leg (6) meets the requirements of the pedestrian collision protection test for the vehicle.

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