Impact testing device and method for sliding plate type chassis of pure electric passenger car

Abstract

The invention discloses an impact test device and method for a sliding plate type chassis of a pure electric passenger car, and relates to the technical field of automobile safety performance testing, a supporting module is movably installed on a mobile main body module and can reciprocate on the mobile main body module, an impact module is installed in the supporting module, and the impact module is installed on the mobile main body module. The impact direction of the impact module is the vertical direction, the upper end of the impact module is used for acting on the lower end of the impact sliding plate type chassis, and the monitoring module monitors the impact speed and acceleration of the impact module, the horizontal speed of the moving body module and the distance between the moving body module and an impact point on the sliding plate type chassis. The monitoring module is electrically connected with the control module, the control module calculates a trigger point of an impact test according to data monitored by the monitoring module, and the power module is connected with the mobile main body module and used for driving the mobile main body module to advance. According to the invention, the actual condition of the sliding plate type chassis of the pure electric passenger car in collision can be simulated, and the accuracy of testing the chassis of the pure electric passenger car is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile safety performance testing, and in particular to an impact testing device and method for a skateboard-type chassis of a pure electric passenger vehicle. Background Art

[0002] Battery chassis integration technology (CTC) is an important way to further improve the space utilization, endurance, body rigidity and cost control of electric vehicles. The chassis using CTC technology is not only the executive component of electric vehicles, but also the key component to ensure the safety of power battery packs. This puts forward higher requirements on the structural design, safety performance and reliability of the chassis. However, the current research and development of pure electric vehicles mainly focuses on batteries and electronic control systems, and traditional technologies are still used in their performance testing technology, resulting in a lack of research on key structural parts of electric vehicles. As an important component of the car, the chassis's working characteristics are related to the safety of the vehicle and the driver and passengers. In particular, the batteries of most electric vehicles are installed inside the chassis. When the vehicle is hit or scratched by sharp objects, it is easy to cause chassis damage, and even cause the battery to burn violently due to external force, causing the car to spontaneously combust. Therefore, it is of great significance to carry out comprehensive performance testing and analysis on the safety of electric vehicle chassis.

[0003] The existing testing requirements for new energy skateboard chassis mainly include bottom scraping test and chassis impact test in a stationary state. However, since the vehicle is stationary, there is only a relative speed in the vertical direction between the impact head and the chassis, and there is no relative speed between the impact object and the chassis in the driving direction. The final test is difficult to fully reproduce the actual accident scenario. Summary of the invention

[0004] The purpose of the present invention is to provide an impact testing device and method for a pure electric passenger vehicle skateboard chassis to solve the problems existing in the above-mentioned prior art, simulate the actual situation of the pure electric passenger vehicle skateboard chassis in a collision, and improve the accuracy of the pure electric passenger vehicle chassis test.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an impact test device for a skateboard-type chassis of a pure electric passenger car, comprising a mobile main body module, an impact module, a support module, a monitoring module, a control module and a power module, wherein the mobile main body module is movable, the support module is movably mounted on the mobile main body module, and the support module is capable of reciprocating on the mobile main body module, the impact module is mounted in the support module, and the impact direction of the impact module is a vertical direction, the upper end of the impact module is used to act on the lower end of the skateboard-type chassis, the monitoring module is used to monitor the impact speed and acceleration of the impact module, the horizontal speed of the mobile main body module and the distance between the mobile main body module and the impact point on the skateboard-type chassis, the monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test according to the data monitored by the monitoring module, and the power module is connected to the mobile main body module and is used to drive the mobile main body module to move.

[0007] Preferably, the mobile main body module includes a power element, a braking element and a mounting frame, the power element is located at the lower end of the mounting frame and is used to provide moving power for the mounting frame, the braking element is connected to the power element and is used to provide braking force for the mounting frame; a position adjustment module is installed at the upper end of the mobile main body module, the support module is installed on the position adjustment module, and can reciprocate in the horizontal direction driven by the position adjustment module, and the moving direction of the support module is perpendicular to the moving direction of the mobile main body module.

[0008] Preferably, the position adjustment module includes a ball screw, a screw slider, a platform, a plurality of guide sliders and a plurality of fixed guide rails, the end of the ball screw is mounted on the movable main body module through a support seat, and the periphery of the ball screw is movably connected to the screw slider, each of the fixed guide rails is parallel to the ball screw, and each of the fixed guide rails is slidably connected to the guide rail slider, the guide rail slider and the screw slider are connected to the upper end of the platform, and the platform is connected to the support module.

[0009] Preferably, the support module includes a vertical support frame and a diagonal brace, the vertical support frame is vertically installed on the upper end of the position adjustment module, the impact module is installed in the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame, the lower end of the diagonal brace is rotatably installed on the position adjustment module through a movable hinge support, the upper end of the diagonal brace is installed on one side of the vertical support frame through the movable hinge support, and is arranged close to the upper end of the movable hinge support; the upper end of the vertical support frame is connected to the upper end of the impact module through a connecting plate, and the lower end of the vertical support frame is connected to the position adjustment module through a long connecting plate and a short connecting plate.

[0010] Preferably, the impact module includes a prime mover impact unit and a driven impact unit, the lower end of the prime mover impact unit is installed on the lower end of the support module, and the prime mover impact unit and the driven impact unit are coaxially arranged, and in an initial state, the upper end of the prime mover impact unit is not in contact with the lower end of the driven impact unit, and the upper end of the driven impact unit is connected to the upper end of the support module; a flange is installed at each of the upper and lower ends of the prime mover impact unit, an upper enclosure is provided on the outer periphery of the upper end of the support module, and a lower enclosure is provided on the outer periphery of the lower end of the support module, the flange at the upper end of the prime mover impact unit is connected to the upper enclosure via an upper large flange, and the flange at the lower end of the prime mover impact unit is connected to the lower enclosure via a lower large flange.

[0011] Preferably, the prime mover impact unit comprises a cylinder rod and a cylinder barrel, one end of the cylinder rod extends into the cylinder barrel for connection, and the cylinder rod does not contact the driven impact unit at the end away from the cylinder barrel; the air source of the cylinder barrel is provided by an air storage tank, and a quick exhaust valve and an air intake valve are also installed on the cylinder barrel, the quick exhaust valve and the air intake valve are connected to the air storage tank through an air pipe respectively, and the cylinder barrel adopts wireless control and is controlled by an electromagnetic valve in conjunction with an electrical box; the driven impact unit comprises an impact barrel, a front impact head and a rear impact head, the impact barrel is located at the periphery of the front impact head and the rear impact head, the upper end of the rear impact head is connected to the lower end of the front impact head, An upper buffer pad capable of extending the upper end of the front impact head is installed at the upper end of the support module, and a lower buffer pad is installed at the lower end of the impact tube, and the lower end of the lower buffer pad is also connected to a lower faceplate, and the upper end of the upper buffer pad is also connected to an upper faceplate, and the upper faceplate and the lower faceplate are both connected to the end of the impact tube; a linear bearing is sleeved on the outer periphery of the rear impact head, and a sleeve is provided on the upper end of the linear bearing, and the lower end of the linear bearing is limited to a shoulder of the inner wall of the impact tube, and the sleeve is sleeved on the outer periphery of the lower end of the front impact head, and the lower end of the sleeve abuts against another shoulder of the inner wall of the impact tube, and the sleeve is fixed in the impact tube by a set screw.

[0012] Preferably, the monitoring module includes a force sensor, a first speed sensor, a second speed sensor and a distance sensor, the force sensor is installed between the front impact head and the rear impact head, the first speed sensor is installed on the front impact head, and the second speed sensor and the distance sensor are both installed on the mobile body module.

[0013] Preferably, the power module is an impact power assembly, which includes an impact cylinder group, a cylinder frame and a guide rail. The guide rail and the cylinder frame are both installed on the ground, and the guide rail is used to provide guidance when the mobile main body module moves. The impact cylinder group is installed on the cylinder frame, and the impact direction of the impact cylinder group is consistent with the travel direction of the mobile main body module.

[0014] Preferably, the power module is a traction power assembly, which includes a winch, a traction cable, a traction slider, a hooked cable and a traction guide rail, the traction guide rail is installed underground, the two ends of the traction cable are respectively connected to the winch and the traction slider, the traction slider is installed on the traction guide rail, and the two ends of the hooked cable are respectively connected to the traction slider and the mobile main body module.

[0015] The present invention also provides an impact test method for a skateboard-type chassis of a pure electric passenger vehicle, using an impact test device for a skateboard-type chassis of a pure electric passenger vehicle described in any one of the above technical solutions, comprising the following steps:

[0016] S1. Move the skateboard chassis of the pure electric passenger vehicle to the specified position, lift the skateboard chassis of the pure electric passenger vehicle to the test height using a test bench or lift and fix it;

[0017] S2. Connect the impact test device of the skateboard chassis of a pure electric passenger car to the guide rail or to the hooked steel cable, and place the cylinder barrel and cylinder rod in the prime mover impact unit in the initial position;

[0018] S3. Determine the impact position on the skateboard chassis of the pure electric passenger vehicle under test, adjust the position adjustment module, and ensure that the impact test device of the skateboard chassis of the pure electric passenger vehicle can reach the position where the impact is required while traveling, and adjust the parameters in the control module program to achieve the coincidence of the actual impact position and the required impact position;

[0019] S4. Start the test, accelerate the impact test device of the skateboard chassis of the pure electric passenger vehicle to a predetermined speed by traction power assembly or impact power assembly, the impact test device of the skateboard chassis of the pure electric passenger vehicle will autonomously complete the fixed-point impact action during the operation of the program, after the impact is completed, brake the impact test device of the skateboard chassis of the pure electric passenger vehicle by the braking element until it stops completely, and then use the power element to drive the impact test device of the skateboard chassis of the pure electric passenger vehicle back to the initial position of the test, and use a high-speed camera to capture and store images during the impact process;

[0020] S5. Repeat the test multiple times to obtain the results of different positions of the skateboard-type chassis of the tested pure electric passenger vehicle after the impact, observe whether the battery is deformed and damaged, and analyze the changes in different skateboard-type chassis of the tested pure electric passenger vehicle after the impact.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The impact test device and method for the skateboard-type chassis of a pure electric passenger vehicle provided by the present invention are characterized in that the mobile main body module can move, thereby facilitating resetting after the test is completed; the support module is movably installed on the mobile main body module, and the support module can reciprocate on the mobile main body module, and then the position of the impact module is changed by adjusting the position of the support module, so that when traveling, the impact module can be aligned with the impact position to complete the impact test, thereby improving the test accuracy and test efficiency; the impact module is installed in the support module, and the impact direction of the impact module is in the vertical direction; the upper end of the impact module is used to act on the lower end of the impact skateboard-type chassis to realize impact simulation in the vertical direction; the monitoring module is used to monitor the impact speed and acceleration of the impact module, the horizontal speed of the mobile main body module, and the moving The distance between the main module and the impact point on the skateboard chassis is used to obtain various data in the impact test in real time. The monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test according to the data monitored by the monitoring module to improve the test accuracy. The power module is connected to the mobile main module and is used to drive the mobile main module to move forward to achieve impact simulation in the horizontal direction. Then, through the combination of horizontal impact and vertical impact, the impact test can be closer to the impact that the skateboard chassis of the pure electric passenger car may be subjected to during driving, and the damage and destruction can be analyzed in situ, which provides a special and reliable impact test device and method for the test of the skateboard chassis of the pure electric passenger car, and provides scientific and effective methods and technologies for improving the safety of pure electric passenger cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the impact testing device for the skateboard-type chassis of a pure electric passenger vehicle in Example 1;

[0025] Figure 2 It is a structural diagram of the position adjustment module in the first embodiment;

[0026] Figure 3It is a structural schematic diagram of the impact module in Example 1;

[0027] Figure 4 This is a schematic diagram of the case where the impact power assembly is used to provide horizontal velocity in the first embodiment;

[0028] Figure 5 This is a schematic diagram of the case where a traction power assembly is used to provide a horizontal speed in the first embodiment;

[0029] In the figure: 101-electric box, 102-pneumatic tire, 103-brake element, 201-cylinder rod, 202-flange, 203-quick exhaust valve, 204-cylinder barrel, 205-intake valve, 206-lower enclosure, 207-lower large flange, 208-upper enclosure, 209-upper large flange, 210-gas storage tank, 211-trachea, 301-upper disc, 302-upper buffer pad, 303-front impact head, 304-sleeve, 305-rear impact head, 306-linear bearing, 307-impact cylinder, 308-lower buffer pad, 309-lower disc, 401-linear connecting plate, 402-L-type connecting plate, 403-upper support foot, 404-connecting Connecting plate, 405-movable hinge support, 406-lower supporting foot, 407-long connecting plate, 408-short connecting plate, 501-second speed sensor, 502-force sensor, 503-first speed sensor, 504-distance sensor, 601-guide rail slider, 602-fixed guide rail, 603-platform, 604-ball screw, 605-screw slider, 606-screw nut, 701-battery, 702-pure electric passenger car skateboard chassis, 703-bench, 801-guide rail, 802-cylinder frame, 803-impact cylinder, 901-traction slider, 902-traction guide rail, 903-traction steel cable, 904-hook steel cable. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide an impact testing device and method for a pure electric passenger car skateboard chassis to solve the problems existing in the prior art, simulate the actual situation of the pure electric passenger car skateboard chassis in a collision, and improve the accuracy of the pure electric passenger car chassis test.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] like Figure 1-Figure 5 As shown, this embodiment provides an impact test device for a skateboard chassis 702 of a pure electric passenger car, including a mobile main body module, an impact module, a support module, a monitoring module, a control module and a power module. The mobile main body module can move, so as to facilitate the reset after the test is completed. The support module is movably installed on the mobile main body module, and the support module can reciprocate on the mobile main body module, and then the position of the impact module is changed by adjusting the position of the support module, so that when traveling, the impact module can be aligned with the impact position to complete the impact test, thereby improving the test accuracy and test efficiency. The impact module is installed in the support module, and the impact direction of the impact module is in the vertical direction. The upper end of the impact module is used to act on the lower end of the impact skateboard chassis. To realize impact simulation in the vertical direction, the monitoring module is used to monitor the impact speed and acceleration of the impact module, the horizontal speed of the mobile main module, and the distance between the mobile main module and the impact point on the skateboard chassis, so as to obtain various data in the impact test in real time. The monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test according to the data monitored by the monitoring module to improve the test accuracy. The power module is connected to the mobile main module and is used to drive the mobile main module to realize impact simulation in the horizontal direction. Then, by combining horizontal impact and vertical impact, the impact test can be closer to the impact that the skateboard chassis may be subjected to during the driving of the pure electric passenger car, and the damage and destruction can be analyzed in situ.

[0035] Specifically, the mobile main body module includes a power element, a braking element 103 and a mounting frame. The power element includes a motor, a pneumatic tire 102, etc. An electrical box 101 is provided to provide power for the movement of the equipment. The pneumatic tire 102 is the main part of the movement. The power element is located at the lower end of the mounting frame and is used to provide moving power for the mounting frame. Then, after the impact test is completed and the braking of the mobile main body module is completed, the mobile main body module and the elements above it are moved and reset by the power element. The braking element 103 is connected to the power element and is used to provide braking force for the mounting frame to implement braking after a collision occurs. A position adjustment module is installed at the upper end of the mobile main body module. The support module is installed on the position adjustment module and can move back and forth in the horizontal direction driven by the position adjustment module. The moving direction of the support module is perpendicular to the moving direction of the mobile main body module. Then, the coordinate positions of the support module and the impact module can be adjusted through the support module, so that the impact module can act on the required impact position when it moves and reaches below the skateboard chassis 702 of the pure electric passenger car.

[0036] like Figure 2As shown, the position adjustment module includes a ball screw 604, a screw slider 605, a platform 603, a plurality of guide rail sliders 601 and a plurality of fixed guide rails 602. The end of the ball screw 604 is installed on the mobile main body module through a support seat to improve stability. The periphery of the ball screw 604 is movably connected to the screw slider 605, so that when the ball screw 604 rotates, it can drive the screw slider 605 to reciprocate along the length direction of the ball screw 604. The screw slider 605 is provided with a screw nut 606. Each fixed guide rail 602 They are parallel to the ball screw 604. Each fixed guide rail 602 is slidably connected with a guide rail slider 601 to guide the guide rail slider 601. The guide rail slider 601 and the lead screw slider 605 are connected to the upper end of the platform 603. When the ball screw 604 rotates, it drives the lead screw slider 605 to move, and the lead screw slider 605 drives the platform 603 to move. With the auxiliary support of the guide rail slider 601 and the fixed guide rail 602, the platform 603 moves more stably. The platform 603 is connected to the support module to adjust the position of the support module. The bottom of the platform 603 is slotted to position the lead screw slider 605 and the guide rail slider 601. As a preferred embodiment, a threaded hole is provided on the guide rail slider 601. After moving into position, a bolt is passed through the threaded hole and pressed against the fixed guide rail 602 to achieve the limitation between the guide rail slider 601 and the fixed guide rail 602. As another preferred embodiment, a limit block is provided on the fixed guide rail 602. When the guide rail slider 601 moves to the limit block and cannot move further, the limit between the guide rail slider 601 and the fixed guide rail 602 is achieved. Those skilled in the art may also choose other limiting methods according to actual needs.

[0037] The support module includes a vertical support frame and an oblique support. An upper support foot 403 is provided at each corner of the upper end of the vertical support frame, a lower support foot 406 is provided at each corner of the lower end, an L-shaped connecting plate 402 and a straight connecting plate 401 are provided in the middle, the vertical support frame is vertically installed on the upper end of the position adjustment module, the impact module is installed in the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame, thereby ensuring the verticality of the impact module through the vertical support frame, the lower end of the oblique support is rotatably installed on the position adjustment module through a movable hinge support 405, and the upper end of the oblique support is connected to the position adjustment module through a movable hinge support 405. The movable hinge support 405 is installed on one side of the vertical support frame and is arranged near the upper end of the movable hinge support 405. The vertical support frame is supported by diagonal braces to improve stability; the upper end of the vertical support frame is connected to the upper end of the impact module through a connecting plate 404, thereby reinforcing the part where the upper part of the vertical support frame is connected to the driven impact unit, so that the impact force is not borne by the profile alone but by the connecting plate 404, the upper faceplate 301 and the profile, thereby improving safety. The lower end of the vertical support frame is connected to the position adjustment module through a long connecting plate 407 and a short connecting plate 408. The vertical support frame can also be set to be telescopic, and can be self-locking after being retracted into place, thereby being able to adapt to different application scenarios.

[0038] like Figure 3As shown, the impact module includes a prime impact unit and a driven impact unit. The lower end of the prime impact unit is installed on the lower end of the support module, and the prime impact unit and the driven impact unit are coaxially arranged. In the initial state, the upper end of the prime impact unit does not contact the lower end of the driven impact unit. When the prime impact unit impacts, it first impacts a distance and then acts on the driven impact unit. The upper end of the driven impact unit is connected to the upper end of the support module. Since the prime impact unit mainly impacts the cylinder 803, the impact direction is vertical, and there is a horizontal speed during the test, The impact process may cause the cylinder rod 201 of the impact cylinder 803 to bend. Based on this, it is not chosen to let the impact cylinder 803 directly impact the skateboard chassis 702 of the pure electric passenger car, but to transition through a driven impact unit. The impact head of the driven impact unit is more in line with the use requirements and is easier to replace. At the same time, the force sensor 502 and various speed sensors in the monitoring module also require space for installation; the action time of the impact module is determined by program control. To achieve the final impact point as the specified impact point, the data provided by sensors such as distance and speed must be calculated by the program. The action is that the impact cylinder 803 of the prime mover impact unit impacts the impact head in the driven impact unit. After the impact head obtains energy (speed), it impacts the skateboard chassis 702 of the pure electric passenger car to achieve impact. Therefore, the final impact power comes from the impact cylinder 803; a flange 202 is installed at each of the upper and lower ends of the prime mover impact unit, an upper enclosure 208 is provided on the outer periphery of the upper end of the support module, and a lower enclosure 206 is provided on the outer periphery of the lower end of the support module. The flange 202 at the upper end of the prime mover impact unit is connected to the upper enclosure 208 through an upper large flange 209, and the flange 202 at the lower end of the prime mover impact unit is connected to the lower enclosure 206 through a lower large flange 207, so as to better connect to the support module and realize a close connection between the prime mover impact unit and the support module.

[0039] The prime mover impact unit comprises a cylinder rod 201 and a cylinder barrel 204, one end of the cylinder rod 201 extends into the cylinder barrel 204 for connection, and the end of the cylinder rod 201 away from the cylinder barrel 204 does not contact the slave impact unit; the gas source of the cylinder barrel 204 is provided by an air storage tank 210, and the cylinder barrel 204 is also equipped with a quick exhaust valve 203 and an air intake valve 205, the quick exhaust valve 203 and the air intake valve 205 are respectively connected to the air storage tank 210 through an air pipe 211, and the cylinder barrel 204 adopts wireless control and is controlled by a solenoid valve in conjunction with an electrical box 101; the slave impact unit comprises an impact barrel 307, a front impact head 303 and a rear impact head 305, the impact barrel 307 is located at the periphery of the front impact head 303 and the rear impact head 305, the upper end of the rear impact head 305 is connected to the lower end of the front impact head 303, and the upper end of the support module is equipped with a The upper buffer pad 302 and the lower end of the impact cylinder 307 are installed with a lower buffer pad 308 to avoid accidents that may occur during the impact process. The lower end of the lower buffer pad 308 is also connected to a lower faceplate 309, and the upper end of the upper buffer pad 302 is also connected to an upper faceplate 301. The upper faceplate 301 and the lower faceplate 309 are both connected to the end of the impact cylinder 307; the outer periphery of the rear impact head 305 is sleeved with a linear bearing 306, which plays a guiding role so that the two impact heads can move in a straight line and minimize friction. The upper end of the linear bearing 306 is provided with a sleeve 304, and the lower end of the linear bearing 306 is limited to a shoulder on the inner wall of the impact cylinder 307. The sleeve 304 is sleeved on the outer periphery of the lower end of the front impact head 303, and the lower end of the sleeve 304 abuts against another shoulder on the inner wall of the impact cylinder 307. The sleeve 304 is fixed in the impact cylinder 307 by a set screw.

[0040] The monitoring module includes a force sensor 502, a first speed sensor 503, a second speed sensor 501 and a distance sensor 504. The force sensor 502 is installed between the front impact head 303 and the rear impact head 305 by glue and bolts, etc., and is used to monitor the impact force. The first speed sensor 503 is installed on the front impact head 303 by glue and bolts, etc., and is used to monitor the impact speed. The second speed sensor 501 and the distance sensor 504 are both installed on the mobile main body module by glue and bolts, etc., and the trigger point of the impact test is calculated by monitoring the speed and distance in cooperation with the program of the control module.

[0041] The electric passenger vehicle skateboard chassis 702 is lifted and fixed by a stand 703. The battery 701 is integrated with the electric passenger vehicle skateboard chassis 702. The impact test device of the electric passenger vehicle skateboard chassis 702 needs to be guided during the movement to ensure that the impact coordinates in the direction of movement are not offset. The impact process is observed and recorded by a high-speed camera.

[0042] like Figure 4As shown, the power module is an impact power assembly, and the impact power module includes an impact cylinder 803 group, a cylinder frame 802 and a guide rail 801. The guide rail 801 and the cylinder frame 802 are both installed on the ground, and the guide rail 801 is used to provide guidance when the mobile main body module moves. The impact cylinder 803 group is installed on the cylinder frame 802. The impact direction of the impact cylinder 803 group is consistent with the moving direction of the mobile main body module, and then the impact cylinder 803 group is used to provide an initial velocity for the impact test device of the skateboard chassis 702 of the pure electric passenger car, and is guided by the guide rail 801.

[0043] like Figure 5 As shown, the power module is a traction power assembly, which includes a winch, a traction cable 903, a traction slider 901, a hooked cable 904 and a traction guide rail 902. The traction guide rail 902 is installed underground, and the two ends of the traction cable 903 are respectively connected to the winch and the traction slider 901. The traction slider 901 is installed on the traction guide rail 902. The two ends of the hooked cable 904 are respectively connected to the traction slider 901 and the mobile main body module. The winch drives the traction cable 903 to stretch, thereby driving the traction slider 901 to move. At the same time, the traction slider 901 is guided by the traction guide rail 902. The traction slider 901 drives the skateboard chassis 702 of the pure electric passenger car to move through the hooked cable 904.

[0044] Compared with the existing chassis impact simulation technology and test methods, this embodiment adds a relative speed in the horizontal direction to the mobile main body module, which can more realistically simulate the bottoming damage during actual driving, and conduct impact tests at different positions and with different impact loads by adjusting the impact position. It further analyzes the correlation between the impact damage of the skateboard-type chassis 702 of the pure electric passenger vehicle and the thermal runaway accident of the battery 701 of the pure electric passenger vehicle, providing scientific and effective methods and technologies for further conducting safety analysis of pure electric passenger vehicles.

[0045] Embodiment 2

[0046] This embodiment provides an impact test method for a pure electric passenger vehicle skateboard chassis 702, using the impact test device for the pure electric passenger vehicle skateboard chassis 702 in the first embodiment, comprising the following steps:

[0047] S1. Move the tested pure electric passenger vehicle skateboard chassis 702 to the specified position, use the test bench 703 or lift to lift the tested pure electric passenger vehicle skateboard chassis 702 to the test height and fix it;

[0048] S2. The impact test device of the pure electric passenger car skateboard chassis 702 is connected to the guide rail 801, or connected to the hook cable 904, and the cylinder barrel 204 and the cylinder rod 201 in the prime mover impact unit are placed in the initial position;

[0049] S3. Determine the impact position on the tested pure electric passenger vehicle skateboard chassis 702, adjust the position adjustment module, and ensure that the impact test device of the pure electric passenger vehicle skateboard chassis 702 can reach the position where the impact is required while traveling, and adjust the parameters in the control module program to achieve the actual impact position coincidence with the required impact position;

[0050] S4. Start the test, accelerate the impact test device of the pure electric passenger vehicle skateboard chassis 702 to a predetermined speed by traction power assembly or impact power assembly, the impact test device of the pure electric passenger vehicle skateboard chassis 702 will autonomously complete the fixed-point impact action during the operation of the program, after the impact is completed, brake the impact test device of the pure electric passenger vehicle skateboard chassis 702 by the brake element 103 until it stops completely, and then use the power element to drive the impact test device of the pure electric passenger vehicle skateboard chassis 702 back to the initial test position, and use a high-speed camera to capture and store images during the impact process;

[0051] S5. Repeat the test multiple times to obtain the results of different positions of the skateboard-type chassis 702 of the tested pure electric passenger vehicle after the impact, observe whether the battery 701 is deformed and damaged, and analyze the changes in the skateboard-type chassis 702 of different tested pure electric passenger vehicles after the impact, which plays an important role in improving the safety of pure electric passenger vehicles.

[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An impact test device for a skateboard chassis of a pure electric passenger car, characterized in that: It includes a mobile main body module, an impact module, a support module, a monitoring module, a control module and a power module. The mobile main body module is movable. The support module is movably installed on the mobile main body module, and the support module can reciprocate on the mobile main body module. The impact module is installed in the support module, and the impact direction of the impact module is a vertical direction. The upper end of the impact module is used to act on the lower end of the impact skateboard chassis. The monitoring module is used to monitor the impact speed and acceleration of the impact module, the horizontal speed of the mobile main body module and the distance between the mobile main body module and the impact point on the skateboard chassis. The monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test according to the data monitored by the monitoring module. The power module is connected to the mobile main body module and is used to drive the mobile main body module to move.

2. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 1, characterized in that: The mobile main body module includes a power element, a braking element and a mounting frame. The power element is located at the lower end of the mounting frame and is used to provide moving power for the mounting frame. The braking element is connected to the power element and is used to provide braking force for the mounting frame. A position adjustment module is installed at the upper end of the mobile main body module. The support module is installed on the position adjustment module and can reciprocate in the horizontal direction driven by the position adjustment module, and the moving direction of the support module is perpendicular to the moving direction of the mobile main body module.

3. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 2, characterized in that: The position adjustment module includes a ball screw, a screw slider, a platform, multiple guide sliders and multiple fixed guide rails. The end of the ball screw is installed on the mobile main body module through a support seat, and the outer periphery of the ball screw is movably connected to the screw slider. Each of the fixed guide rails is parallel to the ball screw, and each of the fixed guide rails is slidably connected to the guide rail slider. The guide rail slider and the screw slider are connected to the upper end of the platform, and the platform is connected to the support module.

4. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 2, characterized in that: The support module includes a vertical support frame and an oblique brace, the vertical support frame is vertically installed on the upper end of the position adjustment module, the impact module is installed in the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame, the lower end of the oblique brace is rotatably installed on the position adjustment module through a movable hinge support, the upper end of the oblique brace is installed on one side of the vertical support frame through the movable hinge support, and is arranged close to the upper end of the movable hinge support; the upper end of the vertical support frame is connected to the upper end of the impact module through a connecting plate, and the lower end of the vertical support frame is connected to the position adjustment module through a long connecting plate and a short connecting plate.

5. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 1, characterized in that: The impact module includes a prime mover impact unit and a driven impact unit, the lower end of the prime mover impact unit is installed on the lower end of the support module, and the prime mover impact unit and the driven impact unit are coaxially arranged, in an initial state, the upper end of the prime mover impact unit is not in contact with the lower end of the driven impact unit, and the upper end of the driven impact unit is connected to the upper end of the support module; a flange is installed at each of the upper and lower ends of the prime mover impact unit, an upper enclosure is provided on the outer periphery of the upper end of the support module, and a lower enclosure is provided on the outer periphery of the lower end of the support module, the flange at the upper end of the prime mover impact unit is connected to the upper enclosure via an upper large flange, and the flange at the lower end of the prime mover impact unit is connected to the lower enclosure via a lower large flange.

6. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 5, characterized in that: The prime mover impact unit comprises a cylinder rod and a cylinder barrel, one end of the cylinder rod extends into the cylinder barrel for connection, and the cylinder rod does not contact the slave impact unit at the end away from the cylinder barrel; the air source of the cylinder barrel is provided by an air storage tank, and a quick exhaust valve and an air intake valve are also installed on the cylinder barrel, and the quick exhaust valve and the air intake valve are connected to the air storage tank through an air pipe respectively, and the cylinder barrel adopts wireless control and is controlled by an electromagnetic valve in conjunction with an electrical box; the slave impact unit comprises an impact barrel, a front impact head and a rear impact head, the impact barrel is located at the periphery of the front impact head and the rear impact head, the upper end of the rear impact head is connected to the lower end of the front impact head, and the An upper buffer pad capable of extending the upper end of the front impact head is installed at the upper end of the support module, and a lower buffer pad is installed at the lower end of the impact tube, and the lower end of the lower buffer pad is also connected to a lower faceplate, and the upper end of the upper buffer pad is also connected to an upper faceplate, and the upper faceplate and the lower faceplate are both connected to the end of the impact tube; a linear bearing is sleeved on the outer periphery of the rear impact head, and a sleeve is provided on the upper end of the linear bearing, and the lower end of the linear bearing is limited to a shoulder of the inner wall of the impact tube, and the sleeve is sleeved on the outer periphery of the lower end of the front impact head, and the lower end of the sleeve abuts against another shoulder of the inner wall of the impact tube, and the sleeve is fixed in the impact tube by a set screw.

7. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 6, characterized in that: The monitoring module includes a force sensor, a first speed sensor, a second speed sensor and a distance sensor. The force sensor is installed between the front impact head and the rear impact head, the first speed sensor is installed on the front impact head, and the second speed sensor and the distance sensor are both installed on the mobile body module.

8. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 1, characterized in that: The power module is an impact power assembly, which includes an impact cylinder group, a cylinder frame and a guide rail. The guide rail and the cylinder frame are both installed on the ground, and the guide rail is used to provide guidance when the mobile main body module moves. The impact cylinder group is installed on the cylinder frame, and the impact direction of the impact cylinder group is consistent with the travel direction of the mobile main body module.

9. The impact test device for the skateboard chassis of a pure electric passenger vehicle according to claim 1, characterized in that: The power module is a traction power assembly, which includes a winch, a traction cable, a traction slider, a hooked cable and a traction guide rail. The traction guide rail is installed underground, and the two ends of the traction cable are respectively connected to the winch and the traction slider. The traction slider is installed on the traction guide rail, and the two ends of the hooked cable are respectively connected to the traction slider and the mobile main body module.

10. An impact test method for a skateboard chassis of a pure electric passenger vehicle, characterized in that: The impact test device for the skateboard chassis of a pure electric passenger vehicle according to any one of claims 1 to 9 comprises the following steps: S1. Move the skateboard chassis of the pure electric passenger vehicle to the specified position, lift the skateboard chassis of the pure electric passenger vehicle to the test height using a test bench or lift and fix it; S2. Connect the impact test device of the skateboard chassis of a pure electric passenger car to the guide rail or to the hooked steel cable, and place the cylinder barrel and cylinder rod in the prime mover impact unit in the initial position; S3. Determine the impact position on the skateboard chassis of the pure electric passenger vehicle under test, adjust the position adjustment module, and ensure that the impact test device of the skateboard chassis of the pure electric passenger vehicle can reach the position where the impact is required while traveling, and adjust the parameters in the control module program to achieve the coincidence of the actual impact position and the required impact position; S4. Start the test, accelerate the impact test device of the skateboard chassis of the pure electric passenger vehicle to a predetermined speed by traction power assembly or impact power assembly, the impact test device of the skateboard chassis of the pure electric passenger vehicle will autonomously complete the fixed-point impact action during the operation of the program, after the impact is completed, brake the impact test device of the skateboard chassis of the pure electric passenger vehicle by the braking element until it stops completely, and then use the power element to drive the impact test device of the skateboard chassis of the pure electric passenger vehicle back to the initial position of the test, and use a high-speed camera to capture and store images during the impact process; S5. Repeat the test multiple times to obtain the results of different positions of the skateboard-type chassis of the tested pure electric passenger vehicle after the impact, observe whether the battery is deformed and damaged, and analyze the changes in different skateboard-type chassis of the tested pure electric passenger vehicle after the impact.

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