A vehicle impact resistance bumper performance testing device

Abstract

The present invention relates to the technical field of detection equipment, and in particular to a vehicle impact resistance bumper performance detection device, comprising a base, a pushing unit, two fixing frames, two pressure gauges and a central control box, wherein the base mainly plays a supporting role, the pushing unit, the fixing frame, the pressure gauge and the central control box are all arranged on the base, an impact block is arranged at the output end of the pushing unit, the pushing unit is used to push the impact block to move and impact the bumper, and a rangefinder for measuring the moving position of the impact block is arranged on the pushing unit; by performing impact deformation detection, deformation time detection and impact force detection on the bumper during the impact resistance detection of the bumper, the impact resistance performance detection of the bumper based on pedestrian protection can be realized, so that the bumper can play a better role in protecting pedestrians, and the comprehensiveness and accuracy of the detection can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, in particular to a device for detecting the performance of an automobile anti-impact bumper. Background Art

[0002] With the rapid development of the automobile industry, traffic safety issues have received increasing attention. As an important component of the vehicle, the automobile bumper's main function is to protect the front and rear of the vehicle in a low-speed collision and reduce damage to pedestrians. Therefore, the bumper's impact resistance directly affects the safety of the vehicle and the protection of pedestrians. In order to ensure that the bumper's design meets safety standards, it must be subject to strict performance testing.

[0003] At present, the inspection method of bumpers is mainly to complete the inspection through direct impact. When the bumper is damaged or has defects such as cracks, the bumper fails the inspection. When the bumper remains intact after the inspection, it passes the inspection. This inspection method mainly tests the strength of the bumper, and does not test whether it can effectively protect pedestrians. Therefore, its inspection direction is single and the inspection results are relatively one-sided. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a vehicle impact resistance bumper performance testing device, the specific technical solution adopted by the present invention is:

[0005] According to a first aspect of the present invention, there is provided a vehicle impact resistance bumper performance testing device, comprising a base, a pushing unit, two fixing frames, two pressure gauges and a central control box, wherein the base mainly plays a supporting role, the pushing unit, the fixing frame, the pressure gauge and the central control box are all arranged on the base, an impact block is arranged at the output end of the pushing unit, the pushing unit is used to push the impact block to move and impact the bumper, and a rangefinder for measuring the moving position of the impact block is arranged on the pushing unit;

[0006] The two fixing frames are both slidably mounted on the base, and the sliding direction of the fixing frames is perpendicular to the direction of the connection line of the two fixing frames. The fixing frames are used to provide a mounting position for the bumper. The pressure gauge is used to measure the magnitude of the force applied to the fixing frames when the bumper is impacted. The central control box is used to record the time taken from the start of the impact of the impact block on the bumper to the end of the impact.

[0007] Among them, when the impact block begins to contact the bumper, the pressure gauge detects the pressure change, and the central control box records the time point. When the rangefinder detects that the impact block moves to the farthest position, the central control box records the time point. The interval between the two time points is the bumper impact time.

[0008] Furthermore, the pushing unit includes a horizontal barrel, a first electromagnetic coil, a movable sleeve, and a second electromagnetic coil. The horizontal barrel is horizontal, the first electromagnetic coil is located in the horizontal barrel, the movable sleeve is located in the first electromagnetic coil, the end of the movable sleeve toward the fixed frame extends out of the horizontal barrel and is fixedly connected to the impact block, and the second electromagnetic coil is arranged in the movable sleeve;

[0009] When the currents passing through the first electromagnetic coil and the second electromagnetic coil are in the same direction, the magnetic forces generated by the first electromagnetic coil and the second electromagnetic coil will push the movable sleeve to move outside the first electromagnetic coil. When the currents passing through the first electromagnetic coil and the second electromagnetic coil are in opposite directions, the first electromagnetic coil will suck the movable sleeve into the first electromagnetic coil through the second electromagnetic coil.

[0010] Furthermore, a turntable is rotatably provided at the end of the horizontal barrel away from the fixing frame, a swivel is rotatably provided at the middle of the horizontal barrel, a cross bar is connected between the swivel and the turntable, the length direction of the cross bar is along the axis direction of the horizontal barrel, and a sliding column is slidably provided on the cross bar;

[0011] A guide groove having the same shape as the first electromagnetic coil is provided on the outer wall of the first electromagnetic coil, and the slide column is slidably installed in the guide groove. One end of the first electromagnetic coil and the slide column are electrically connected to the power supply, and the other end of the first electromagnetic coil is idle.

[0012] Furthermore, a support tube is provided in the middle of the horizontal barrel, the first electromagnetic coil is fixed on the outer wall of the support tube, the movable sleeve is slidably located inside the support tube, a support ring is fixed in the middle of the support tube, and the support ring is fixed on the inner wall of the horizontal barrel.

[0013] Furthermore, the support tube is formed by connecting a first branch tube and a second branch tube, the first branch tube is located on the side of the swivel away from the first electromagnetic coil, the second branch tube is located inside the first electromagnetic coil, and the first electromagnetic coil is fixed on the outer wall of the second branch tube;

[0014] The second branch pipe is magnetically conductive inside, and an insulating layer is coated on the outer wall of the second branch pipe.

[0015] Furthermore, the cross-sectional shape of the movable sleeve is square, and the movable sleeve is used in conjunction with the horizontal barrel. A limit plate is provided at the end of the movable sleeve away from the impact block, and the limit plate slides in the support tube.

[0016] Furthermore, a platform is slidably arranged on the base, the sliding direction of the platform is parallel to the direction of the connection line of the two fixing frames, a first motor is fixed on the base, a threaded rod is arranged at the output end of the first motor, the threaded rod passes through the platform and is threadedly connected to each other;

[0017] The horizontal barrel is fixed on the platform, a second motor is arranged on the horizontal barrel, a transmission wheel is arranged at the output end of the second motor, and the transmission wheel is transmission-connected with the turntable.

[0018] Furthermore, a fixed plate is rolled on the horizontal barrel, a conductive rod is inserted and fixed on the fixed plate, the conductive rod is coaxial with the turntable, a conductive ring is sleeved on the outer side of the conductive rod, the conductive ring is fixed on the turntable, an annular groove is opened on the outer wall of the conductive rod and the inner wall of the conductive ring, and a plurality of balls are rolled between the two annular grooves;

[0019] Wherein, the conductive rod is electrically connected to the power supply.

[0020] The beneficial effects of the present invention are:

[0021] By testing the impact deformation, deformation time and impact force of the bumper during the impact test, the bumper impact resistance performance test based on pedestrian protection can be realized, so that the bumper can better protect pedestrians and improve the comprehensiveness and accuracy of the test; the detection of the bumper deformation reflects the buffer distance that the bumper can provide when it contacts the human body, which helps to evaluate the energy absorption capacity of the bumper; the detection of the deformation time reflects the buffer time that the bumper can provide when it contacts the human body, which helps to evaluate the response speed of the bumper; the detection of the impact force reflects the protective effect of the bumper on pedestrians; through a comprehensive, high-precision and efficient detection method, not only the impact strength of the bumper can be evaluated, but also its protective effect on pedestrians can be evaluated. While improving the test accuracy and efficiency, the device ensures that the design of the bumper meets the safety standards, providing strong support for the design and optimization of automobile bumpers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a schematic structural diagram of a pushing unit in an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the internal structure of the horizontal barrel in an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a first electromagnetic coil and a support tube in an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a cross-section of a support tube in an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the structure of the turntable in the embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Base; 2. Pushing unit; 3. Fixed frame; 4. Pressure gauge; 5. Central control box; 6. Impact block; 7. Distance meter; 8. Horizontal barrel; 9. First electromagnetic coil; 10. Moving sleeve; 11. Second electromagnetic coil; 12. Turntable; 13. Rotating ring; 14. Cross bar; 15. Sliding column; 16. Support ring; 17. Support pipe; 18. Limit plate; 19. First branch; 20. Second branch; 21. Platform; 22. First motor; 23. Threaded rod; 24. Second motor; 25. Transmission wheel; 26. Fixed plate; 27. Conductive rod; 28. Conductive ring; 29. ​​Sphere. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0034] like Figures 1 to 6As shown, a vehicle anti-impact bumper performance testing device of the present invention comprises a base 1, a pushing unit 2, two fixing frames 3, two pressure gauges 4 and a central control box 5, wherein the base 1 mainly plays a supporting role, the pushing unit 2, the fixing frame 3, the pressure gauge 4 and the central control box 5 are all arranged on the base 1, an impact block 6 is arranged at the output end of the pushing unit 2, the pushing unit 2 is used to push the impact block 6 to move and impact the bumper, and a rangefinder 7 for measuring the moving position of the impact block 6 is arranged on the pushing unit 2;

[0035] The two fixing frames 3 are both slidably mounted on the base 1, and the sliding direction of the fixing frames 3 is perpendicular to the direction of the connection line of the two fixing frames 3. The fixing frames 3 are used to provide a mounting position for the bumper. The pressure gauge 4 is used to measure the magnitude of the force applied to the fixing frames 3 when the bumper is impacted. The central control box 5 is used to record the time taken from the start of the impact of the impact block 6 on the bumper to the end of the impact.

[0036] Among them, when the impact block 6 begins to contact the bumper, the pressure gauge 4 detects the pressure change, and the central control box 5 records the time point. When the rangefinder 7 detects that the impact block 6 moves to the farthest position, the central control box 5 records the time point. The interval between the two time points is the bumper impact time.

[0037] In detail, the pushing unit 2 is used to provide a driving force for the movement of the impact block 6. The moving direction of the impact block 6 is perpendicular to the direction of the connection between the two fixing frames 3. In this way, when the bumper is fixed on the two fixing frames 3, the impact block 6 can vertically perform impact detection on the bumper. Since the pressure gauge 4 needs to detect the force acting on the bumper, it is necessary to enable the fixing frame 3 to slide on the base 1, and the fixing frame 3 is connected to the pressure gauge 4, and the central control box 5 is respectively connected to the pressure gauge 4 and the rangefinder 7 signals. In this way, the time taken for the bumper to be impacted and bent can be recorded through the central control box 5.

[0038] When in use, the pushing unit 2 moves the impact block 6 to a position away from the fixing frame 3, and fixes the bumper on the two fixing frames 3. Of course, the fixing work of the bumper can be done in a conventional way that does not affect the detection work. At this time, since the impact block 6 has not yet impacted the bumper, in the horizontal direction, the fixing frame 3 and the pressure gauge 4 are both in a stationary state, and the detection value of the pressure gauge 4 is zero. When the detection starts, the pushing unit 2 provides a lateral driving force for the impact block 6, so that the impact block 6 moves quickly toward the bumper. When the impact block 6 contacts the bumper, the pressure gauge 4 detects that the bumper is subjected to an extrusion force, and the central control box 5 records this time point. The rangefinder 7 detects the position of the impact block 6 at this time. As the impact block 6 squeezes the bumper, the bumper is deformed, and the pressure gauge 4 records the change in the force acting on the bumper. When the bumper overcomes the force of the impact block 6 and stops the impact block 6 from moving, the impact block 6 moves to the farthest position. At this time, the rangefinder 7 detects the position of the impact block 6. The distance meter 7 detects the position of the impact block 6, and the central control box 5 records the time point, so that the detection results of the impact deformation, deformation time and impact force of the bumper can be obtained, that is, the distance value from the time when the impact block 6 starts to contact with the bumper to the time when the impact block 6 stops moving detected by the distance meter 7 is the impact deformation, and the impact deformation is the buffering distance that the bumper can play when the bumper contacts the human body. The interval between the two time points recorded by the central control box 5 is the deformation time, and the deformation time is the deformation time of the bumper when the bumper contacts the human body, that is, the buffering time that the bumper can provide for pedestrians. The impact force on the bumper detected by the two pressure gauges 4 is the force applied by the bumper to the human body when the human body contacts the bumper. The magnitude of the force cannot exceed the specified value, otherwise it will cause harm to the pedestrian. Combining the detection of the above three types of data, the bumper impact resistance performance detection based on pedestrian protection work can be realized.

[0039] Of course, the above detection method is mainly based on the premise of not damaging the bumper. If a destructive test is required to detect the maximum impact resistance of the bumper, the impact effect on the bumper can be increased by strengthening the pushing force of the pushing unit 2 on the impact block 6, and the pressure gauge 4 can be used to detect the magnitude of the force applied to the bumper.

[0040] By testing the impact deformation, deformation time and impact force of the bumper during the impact test, the bumper impact resistance performance test based on pedestrian protection can be realized, so that the bumper can better protect pedestrians and improve the comprehensiveness and accuracy of the test; the detection of the bumper deformation reflects the buffer distance that the bumper can provide when it contacts the human body, which helps to evaluate the energy absorption capacity of the bumper; the detection of the deformation time reflects the buffer time that the bumper can provide when it contacts the human body, which helps to evaluate the response speed of the bumper; the detection of the impact force reflects the protective effect of the bumper on pedestrians; through a comprehensive, high-precision and efficient detection method, not only the impact strength of the bumper can be evaluated, but also its protective effect on pedestrians can be evaluated. While improving the test accuracy and efficiency, the device ensures that the design of the bumper meets the safety standards, providing strong support for the design and optimization of automobile bumpers.

[0041] Furthermore, the pushing unit 2 includes a horizontal barrel 8, a first electromagnetic coil 9, a movable sleeve 10, and a second electromagnetic coil 11. The horizontal barrel 8 is horizontal, the first electromagnetic coil 9 is located in the horizontal barrel 8, the movable sleeve 10 is located in the first electromagnetic coil 9, the end of the movable sleeve 10 in the direction of the fixed frame 3 extends out of the horizontal barrel 8 and is fixedly connected to the impact block 6, and the second electromagnetic coil 11 is arranged in the movable sleeve 10;

[0042] When the currents passing through the first electromagnetic coil 9 and the second electromagnetic coil 11 are in the same direction, the magnetic forces generated on the first electromagnetic coil 9 and the second electromagnetic coil 11 will push the movable sleeve 10 to move outside the first electromagnetic coil 9; when the currents passing through the first electromagnetic coil 9 and the second electromagnetic coil 11 are in opposite directions, the first electromagnetic coil 9 will suck the movable sleeve 10 into the first electromagnetic coil 9 through the second electromagnetic coil 11.

[0043] In detail, the first electromagnetic coil 9 and the second electromagnetic coil 11 are in an inner-outer outer structure, and the second electromagnetic coil 11 is installed in the movable sleeve 10, and the movable sleeve 10 is made of non-magnetic conductive material, so that when the first electromagnetic coil 9 and the second electromagnetic coil 11 are energized, the first electromagnetic coil 9 and the second electromagnetic coil 11 will generate a magnetic field, and the direction of the magnetic field generated by the first electromagnetic coil 9 and the second electromagnetic coil 11 can be controlled by limiting the spiral direction or current flow direction of the first electromagnetic coil 9 and the second electromagnetic coil 11, so that when the first electromagnetic coil 9 and the second electromagnetic coil 11 are energized in the same direction, the first electromagnetic coil 9 and the second electromagnetic coil 11 generate a repulsive force, that is, the second The electromagnetic coil 11 moves laterally in the first electromagnetic coil 9 and moves out of the first electromagnetic coil 9, and the second electromagnetic coil 11 will drive the movable sleeve 10 to move laterally synchronously. The movable sleeve 10 pushes the impact block 6 to move, thereby providing a driving force for the impact block 6, so that the impact block 6 hits the bumper. When the current directions of the first electromagnetic coil 9 and the second electromagnetic coil 11 are opposite, the first electromagnetic coil 9 will suck the second electromagnetic coil 11 into the first electromagnetic coil 9, so that the impact block 6 is reset. In this way, the electromagnetic principle can be used to control the position of the impact block 6. Compared with the traditional electromagnetic structure that can only realize the contraction function, the structure of this case can realize the electromagnetic control method of bidirectional driving force.

[0044] Furthermore, a turntable 12 is rotatably provided at the end of the horizontal barrel 8 away from the fixing frame 3, a swivel 13 is rotatably provided at the middle of the horizontal barrel 8, a cross bar 14 is connected between the swivel 13 and the turntable 12, the length direction of the cross bar 14 is along the axis direction of the horizontal barrel 8, and a sliding column 15 is slidably provided on the cross bar 14;

[0045] Among them, a guide groove consistent with the shape of the first electromagnetic coil 9 is opened on the outer wall of the first electromagnetic coil 9, and the slide column 15 is slidably installed in the guide groove. One end of the first electromagnetic coil 9 and the slide column 15 are electrically connected to the power supply, and the other end of the first electromagnetic coil 9 is idle.

[0046] In detail, in order to adjust the driving force of the impact block 6 and realize impact detection under various driving forces, the impact force of the impact block 6 can be changed by changing the size of the magnetic field generated by the first electromagnetic coil 9, that is, one end of the first electromagnetic coil 9 is connected to the power supply, and the slide column 15 is also connected to the power supply. In this way, the area between the slide column 15 and the end of the first electromagnetic coil 9 is the area connected to the power supply. This area is energized and can generate a magnetic field. When the size of the magnetic field needs to be adjusted, the turntable 12 can be rotated to make the turntable 12 drive the cross bar 14, the slide column 15 and the swivel 13 to rotate. The slide column 15 will move along the guide groove on the first electromagnetic coil 9, thereby changing the size of the area on the first electromagnetic coil 9 that is connected to the power supply. Since the shape of the guide groove is consistent with the shape of the first electromagnetic coil 9, when the turntable 12 rotates, the slide column 15 will slide along the length direction of the cross bar 14.

[0047] In actual use, for the convenience of wiring, the turntable 12, the crossbar 14 and the slide post 15 can be electrically connected, and the turntable 12 transmits current to the slide post 15, so that the power wire is then connected to the turntable 12.

[0048] Furthermore, a support tube 17 is provided in the middle of the horizontal barrel 8, the first electromagnetic coil 9 is fixed on the outer wall of the support tube 17, the movable sleeve 10 is slidably located inside the support tube 17, and a support ring 16 is fixed in the middle of the support tube 17, and the support ring 16 is fixed on the inner wall of the horizontal barrel 8.

[0049] In detail, by providing the support tube 17 and the support ring 16 , it is convenient to provide support and installation position for the first electromagnetic coil 9 and the movable sleeve 10 .

[0050] Furthermore, the support tube 17 is formed by connecting a first branch tube 19 and a second branch tube 20, the first branch tube 19 is located on the side of the swivel 13 away from the first electromagnetic coil 9, the second branch tube 20 is located inside the first electromagnetic coil 9, and the first electromagnetic coil 9 is fixed on the outer wall of the second branch tube 20;

[0051] The second branch pipe 20 is magnetically conductive inside, and an insulating layer is coated on the outer wall of the second branch pipe 20 .

[0052] In detail, when the length of the circuit connected to the first electromagnetic coil 9 changes, the size and coverage of the magnetic field it generates will change. In order to reduce the impact of the coverage change on the second electromagnetic coil 11, the second branch pipe 20 can be used to gather and organize the magnetic field generated by the first electromagnetic coil 9. This can ensure that the thrust exerted on the second electromagnetic coil 11 located on the inner side of the second branch pipe 20 is constant. Moreover, since the magnetic field generated by the first electromagnetic coil 9 will enter the second branch pipe 20, the second branch pipe 20 can easily expand the coverage of the magnetic field generated by the first electromagnetic coil 9, so that the second electromagnetic coil 11 will be subjected to the magnetic field thrust when moving in the second branch pipe 20.

[0053] It should be pointed out that the second branch pipe 20 can be set as an acceleration zone and the first branch pipe 19 can be set as an inertia zone. When the second electromagnetic coil 11 accelerates in the second branch pipe 20 and enters the first branch pipe 19, the second electromagnetic coil 11 and the impact block 6 will naturally hit the bumper due to inertia.

[0054] Furthermore, the cross-sectional shape of the movable sleeve 10 is square, and the movable sleeve 10 is used in conjunction with the horizontal barrel 8 . A limit plate 18 is provided at the end of the movable sleeve 10 away from the impact block 6 , and the limit plate 18 slides in the support tube 17 .

[0055] In detail, in order to simulate the collision between the human leg and the bumper, the shape of the impact block 6 is usually set to a vertical strip. By making the shape of the movable sleeve 10 square, the movable sleeve 10 can be prevented from rotating when moving horizontally, thereby ensuring that the direction of the impact block 6 remains unchanged. The setting of the limit plate 18 can limit the moving position of the movable sleeve 10 in the support tube 17 to prevent the movable sleeve 10 and the support tube 17 from detaching from each other.

[0056] Furthermore, a platform 21 is slidably provided on the base 1, and the sliding direction of the platform 21 is parallel to the direction of the connection line of the two fixing frames 3. A first motor 22 is fixed on the base 1, and a threaded rod 23 is provided at the output end of the first motor 22. The threaded rod 23 passes through the platform 21 and is threadedly connected to each other.

[0057] The horizontal barrel 8 is fixed on the platform 21 . A second motor 24 is disposed on the horizontal barrel 8 . A transmission wheel 25 is disposed at an output end of the second motor 24 . The transmission wheel 25 is in transmission connection with the turntable 12 .

[0058] In detail, the first motor 22 and the threaded rod 23 can push the platform 21 to move, and the platform 21 will drive the cross barrel 8 to move, thereby adjusting the position of the impact block 6 on the bumper. The second motor 24 and the transmission wheel 25 can provide power for the rotation of the turntable 12, thereby providing power for the adjustment of the length of the circuit connected to the first electromagnetic coil 9.

[0059] Furthermore, a fixing plate 26 is rolled on the horizontal barrel 8, a conductive rod 27 is inserted and fixed on the fixing plate 26, the conductive rod 27 is coaxial with the turntable 12, a conductive ring 28 is sleeved on the outer side of the conductive rod 27, the conductive ring 28 is fixed on the turntable 12, an annular groove is opened on the outer wall of the conductive rod 27 and the inner wall of the conductive ring 28, and a plurality of balls 29 are rolled between the two annular grooves;

[0060] The conductive rod 27 is electrically connected to the power source.

[0061] In detail, the electric energy of the power supply can be transmitted to the turntable 12 through the conductive rod 27, the sphere 29 and the conductive ring 28. Since the turntable 12 needs to rotate, the turntable 12 will drive the conductive ring 28 to rotate. The sphere 29 is used to connect the conductive rod 27 and the conductive ring 28, thereby realizing the normal transmission of electric energy.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle impact resistance bumper performance testing device, characterized in that: It includes a base, a pushing unit, two fixing frames, two pressure gauges and a central control box. The base mainly plays a supporting role. The pushing unit, the fixing frame, the pressure gauge and the central control box are all arranged on the base. An impact block is arranged at the output end of the pushing unit. The pushing unit is used to push the impact block to move and impact the bumper. A rangefinder for measuring the moving position of the impact block is arranged on the pushing unit. The two fixing frames are both slidably mounted on the base, and the sliding direction of the fixing frames is perpendicular to the direction of the connection line of the two fixing frames. The fixing frames are used to provide a mounting position for the bumper. The pressure gauge is used to measure the magnitude of the force applied to the fixing frames when the bumper is impacted. The central control box is used to record the time taken from the start of the impact of the impact block on the bumper to the end of the impact. Among them, when the impact block begins to contact the bumper, the pressure gauge detects the pressure change, and the central control box records the time point. When the rangefinder detects that the impact block moves to the farthest position, the central control box records the time point. The interval between the two time points is the bumper impact time.

2. The vehicle impact resistance bumper performance testing device according to claim 1, characterized in that: The pushing unit comprises a horizontal barrel, a first electromagnetic coil, a movable sleeve and a second electromagnetic coil. The horizontal barrel is horizontal, the first electromagnetic coil is located in the horizontal barrel, the movable sleeve is located in the first electromagnetic coil, the end of the movable sleeve facing the fixed frame extends out of the horizontal barrel and is fixedly connected to the impact block, and the second electromagnetic coil is arranged in the movable sleeve; When the currents passing through the first electromagnetic coil and the second electromagnetic coil are in the same direction, the magnetic forces generated by the first electromagnetic coil and the second electromagnetic coil will push the movable sleeve to move outside the first electromagnetic coil. When the currents passing through the first electromagnetic coil and the second electromagnetic coil are in opposite directions, the first electromagnetic coil will suck the movable sleeve into the first electromagnetic coil through the second electromagnetic coil.

3. The vehicle impact resistance bumper performance testing device according to claim 2, characterized in that: A turntable is rotatably provided at the end of the horizontal barrel away from the fixing frame, a swivel is rotatably provided at the middle of the horizontal barrel, a cross bar is connected between the swivel and the turntable, the length direction of the cross bar is along the axis direction of the horizontal barrel, and a sliding column is slidably provided on the cross bar; A guide groove having the same shape as the first electromagnetic coil is provided on the outer wall of the first electromagnetic coil, and the slide column is slidably installed in the guide groove. One end of the first electromagnetic coil and the slide column are electrically connected to the power supply, and the other end of the first electromagnetic coil is idle.

4. The vehicle impact resistance bumper performance testing device according to claim 3, characterized in that: A support tube is arranged in the middle of the horizontal barrel, the first electromagnetic coil is fixed on the outer wall of the support tube, the movable sleeve is slidably located inside the support tube, a support ring is fixed in the middle of the support tube, and the support ring is fixed on the inner wall of the horizontal barrel.

5. The vehicle impact resistance bumper performance testing device according to claim 4, characterized in that: The support tube is formed by connecting a first branch tube and a second branch tube, the first branch tube is located on the side of the swivel away from the first electromagnetic coil, the second branch tube is located inside the first electromagnetic coil, and the first electromagnetic coil is fixed on the outer wall of the second branch tube; The second branch pipe is magnetically conductive inside, and an insulating layer is coated on the outer wall of the second branch pipe.

6. The vehicle impact resistance bumper performance testing device according to claim 5, characterized in that: The cross-sectional shape of the movable sleeve is square, and the movable sleeve is used in conjunction with the horizontal barrel. A limiting plate is arranged at the end of the movable sleeve away from the impact block, and the limiting plate slides in the supporting tube.

7. The vehicle impact resistance bumper performance testing device according to claim 6, characterized in that: A platform is slidably arranged on the base, the sliding direction of the platform is parallel to the direction of the connection line of the two fixing frames, a first motor is fixed on the base, a threaded rod is arranged at the output end of the first motor, the threaded rod passes through the platform and is threadedly connected to each other; The horizontal barrel is fixed on the platform, a second motor is arranged on the horizontal barrel, a transmission wheel is arranged at the output end of the second motor, and the transmission wheel is transmission-connected with the turntable.

8. The vehicle impact resistance bumper performance testing device according to claim 7, characterized in that: A fixed plate is rolled on the horizontal barrel, a conductive rod is inserted and fixed on the fixed plate, the conductive rod is coaxial with the rotating disk, a conductive ring is sleeved on the outer side of the conductive rod, the conductive ring is fixed on the rotating disk, an annular groove is opened on the outer wall of the conductive rod and the inner wall of the conductive ring, and a plurality of balls are rolled between the two annular grooves; Wherein, the conductive rod is electrically connected to the power supply.

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