JP2014085249A - Side collision testing method and side collision testing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side collision testing method for a vehicle which can execute the side collision testing method for a full vehicle without requiring a wide area and a small-sized and inexpensive side collision testing device for the method.SOLUTION: A collision carriage 2 is accelerated by an accelerator 1 so as to collide toward the side surface of a test vehicle 3 placed in the front of a rigid body wall 4. After the collision carriage 2 collides against the test vehicle 3, the advance of the collision carriage 2 is rapidly stopped by an energy adsorption device 13 provided between the collision carriage 2 and the accelerator 1, and the collision carriage 2 is prevented from colliding again against the test vehicle 3 stopped at the rigid body wall 4. Through shaft collapsing of a metal pipe, the energy absorption device 13 for absorbing the energy can be used.

Description

  The present invention relates to a side impact test method and a side impact test apparatus for automobiles for evaluating side impact performance performed in the development and design stage of automobiles.

  In the development and design stage of automobiles, evaluation of vehicle body collision performance is inevitable, and automobile manufacturers make prototype vehicles (full vehicles) and perform performance evaluation using large-scale collision test equipment.

  In particular, a side impact test of an automobile is an important test item. For example, as shown in Patent Document 1, a test vehicle placed on a guide rail is pulled by a power wire to accelerate to a predetermined impact speed, and a structure to be impacted is detected. A device that collides with an object is used. However, such a wire winding type apparatus can only obtain an acceleration of 0.5 G or less, and a long acceleration distance is required to obtain a predetermined collision speed.

  In addition, when performing a side impact test in which a collision vehicle collides with a stopped test vehicle from the side, the site area required to allow the test vehicle and the collision vehicle after the collision to move freely and stop is provided. Yes, the side impact test equipment is large and expensive.

  For this reason, the number of side impact test equipment cannot be increased easily, and therefore the side impact test equipment is always in shortage, and a long waiting time is required before the test is performed, which contributes to a delay in the development process. It was.

JP 2001-147173 A

  Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and to perform a side collision test in a full vehicle without requiring a large area, and a small and inexpensive side collision test for the same. Is to provide a device.

  In order to solve the above-mentioned problems, the side collision test method for an automobile according to the present invention includes a collision vehicle that is accelerated by an acceleration device toward the side of a test vehicle placed on the front surface of a rigid wall, and collides. After the truck collides with the test vehicle, the energy absorber installed between the collision truck and the accelerator stops the collision truck from moving forward, preventing the collision truck from colliding again with the test vehicle stopped at the rigid wall. It is characterized by doing.

  In addition, an automobile side collision test apparatus of the present invention made to solve the above-described problems includes a rigid wall, a collision carriage that collides with a side face of a test vehicle placed in front of the rigid body, and tests the collision carriage. It consists of an accelerating device that accelerates toward the vehicle. The collision cart and the acceleration device are connected by a tow wire connected to the energy absorbing device at one end, and the energy is absorbed after the collision cart collides with the test vehicle. The forward movement of the collision carriage is stopped by the device.

  As in claim 3, it is preferable that the acceleration device is a hydraulic acceleration device in which the piston is pushed out by hydraulic pressure. According to a fourth aspect of the present invention, the energy absorbing device is preferably a device that absorbs energy by axially crushing a metal tube. Further, as in claim 5, it is preferable that the collision carriage is provided with a braking device for preventing the collision carriage from moving backward.

  According to the present invention, the collision carriage is rapidly accelerated by the acceleration device to collide with the side surface of the test vehicle, and after the collision, the forward movement of the collision carriage is rapidly stopped by the energy absorbing device. By using a hydraulic accelerator that pushes the piston by hydraulic pressure as the accelerator, a 950 kg collision vehicle can be accelerated to a speed of 64 km / h over an acceleration distance of 1 m or less, compared to a wire-winding accelerator. Thus, the size of the entire apparatus can be reduced to about 1/10. In the event of a collision, the collision carriage moves forward at almost the same speed as the test vehicle, but the test carriage stops at the rigid wall, so the collision carriage may collide with the test vehicle again. Since the forward movement of the collision carriage is suddenly stopped, re-collision can be prevented.

  As described above, according to the present invention, the side collision test apparatus for automobiles can be reduced to a length of only about 1/10 of the conventional one, and the same test result as that of the prior art can be obtained. For this reason, it is possible for material manufacturers and parts manufacturers other than automobile manufacturers to perform performance evaluation relatively easily, which can greatly contribute to improving the safety of automobiles.

It is a whole perspective view of the side collision test device of an embodiment. It is a bottom perspective view showing an energy absorbing device. It is operation | movement explanatory drawing of an energy absorber. It is explanatory drawing of the one-way clutch of a collision trolley | bogie.

Preferred embodiments of the present invention are shown below.
FIG. 1 is an overall perspective view of a side collision test apparatus according to an embodiment, where 1 is an acceleration device, 2 is a collision carriage, 3 is a full vehicle test vehicle, 4 is a rigid wall, and 5 is a shock absorber disposed on the front surface thereof. is there. The test vehicle 3 is disposed laterally at a position several m away from the rigid wall 4, and a collision carriage 2 accelerated by an acceleration device 1 described later collides with the side surface. The moment of the collision and the behavior immediately after that are photographed and analyzed by the camera 6 installed above. Reference numeral 7 denotes a plurality of illumination lamps installed around the test vehicle 3 to illuminate the test vehicle 3. The distance between the tip of the collision carriage 2 and the test vehicle 3 is 1 m, and the acceleration device 1 of this embodiment can accelerate the collision carriage 2 to a speed of, for example, 64 km / h with this short acceleration distance. .

  In order to give such a large acceleration to the collision carriage 2 having a mass of about 1 ton, the acceleration device 1 having a large thrust (for example, 50 tons) is used. In this embodiment, the acceleration device 1 is a hydraulic acceleration device of a type that pushes out a piston by hydraulic pressure. More specifically, an acceleration device having a hydraulic control system that pressurizes hydraulic oil with a nitrogen accumulator 8 and supplies the hydraulic oil to the cylinder 9 and opens it in a short time was used. With this structure, a larger hydraulic pressure is applied to the cylinder 9 at once, and the piston 10 is instantaneously advanced to accelerate the collision carriage 2 to a required speed within a short distance.

  The collision carriage 2 is pushed out at the tip of the piston 10 of the acceleration device 1 and has a sufficiently strong structure to withstand acceleration. The collision carriage 2 includes tire wheels 11.

  When the collision carriage 2 collides with the test vehicle 3, the collision carriage 2 also has substantially the same forward speed as the test vehicle 3. However, since the test vehicle 3 moves to the rigid wall 4 and stops at that position, the collision vehicle 2 may collide with the stopped test vehicle 3 again as it is. The deformation of the vehicle body due to the re-collision is not preferable for the subsequent deformation analysis of the vehicle body. Therefore, in the present invention, the pulling wire 12 and the energy absorbing device 13 are used to suddenly stop the forward movement of the collision carriage 2 after the collision, thereby preventing re-collision.

  As shown in FIG. 2, one end of the pulling wire 12 is fixed so as not to move to the base of the acceleration device 1, and the other end thereof is connected to the energy absorbing device 13 provided in the collision carriage 2. As shown in FIG. 3, the energy absorbing device 13 includes a fixed wall 14, a movable wall 15, a rod 16 penetrating these two walls, and a steel pipe or the like disposed between these two walls. It consists of a metal pipe 17. The tip of the rod 16 is connected to or integrated with the head 18 on the front surface of the movable wall 15. A pulling wire 12 is connected to the proximal end of the rod 16. The length of the pulling wire 12 is set to a distance at which the forward movement of the collision carriage 2 is desired to be stopped, that is, a distance that can prevent re-collision.

  When the collision carriage 2 is accelerated, the pulling wire 12 is loose as shown in the upper diagram of FIG. However, as the collision carriage 2 moves forward after the collision, the pulling wire 12 extends as shown in the middle diagram of FIG. In this state, the rod 16 to which the pulling wire 12 is connected cannot advance further. However, since the collision carriage 2 tends to further move forward due to inertia, an axial load is applied to the metal pipe 17 such as a steel pipe, and the metal pipe 17 is axially crushed as shown in the lower part of FIG. By this axial crushing, the forward kinetic energy of the collision carriage 2 can be absorbed and the collision carriage 2 can be stopped.

  According to such an energy absorbing device 13, the braking stroke (distance to stop) can be arbitrarily set by using the metal pipe 17 having a different cross-sectional area and its yield strength. After that, the collision carriage 2 can be completely stopped at 0.3 m. For this reason, it is possible to prevent a re-collision in which the collision carriage 2 collides with the test vehicle 3 stopped. There are energy absorbers using hydraulic dampers and frictional heat generation, but they are larger and heavier than the energy absorber 13 described above.

  In the state shown in the lower part of FIG. 3, elastic energy is stored in the pulling wire 12, so that the collision carriage 2 may move backward by the elastic energy after stopping and collide with the acceleration device 1. Since the reverse speed is not so high, it can be applied even by friction braking with tires, but it is necessary to reduce the time lag for operating the brake and improve the reliability of the control system, so the device becomes complicated and expensive. .

  Therefore, in this embodiment, as shown in FIG. 4, a one-way clutch 19 is incorporated as a braking device on the axle of the collision carriage 2 to prevent the collision carriage 2 from moving backward. With such a structure, it is possible to brake only backwards without a control signal from the outside, and it is possible to prevent trouble that the collision carriage 2 collides with the acceleration device 1.

  As described above, according to the present invention, the collision carriage 2 is accelerated by the acceleration device 1 and the test is performed to collide toward the side surface of the test vehicle 3 placed on the front surface of the rigid wall 1. The behavior can be photographed and analyzed by the camera 6. In addition, after the collision carriage 2 collides with the test vehicle 3, the advancement of the collision carriage 2 can be stopped by the energy absorbing device 13, and the collision carriage 2 can be prevented from colliding again with the test vehicle 3.

  Further, according to the present invention, the side collision test apparatus, which required a length of 200 m or more in the wire winding type conventional apparatus, can be downsized to a length of only about 20 m, and the collision carriage 2 Since there is no change in the collision speed, the same test results can be obtained.

DESCRIPTION OF SYMBOLS 1 Accelerator 2 Collision trolley 3 Test vehicle 4 Rigid wall 5 Buffer material 6 Camera 7 Illumination light 8 Nitrogen accumulator 9 Cylinder 10 Piston 11 Wheel 12 Pulling wire 13 Energy absorber 14 Fixed wall 15 Movable wall 16 Rod 17 Metal pipe 18 Head 19 One-way clutch

Claims (5)

  The collision truck is accelerated by the accelerator to collide toward the side of the test vehicle placed on the front surface of the rigid wall. After the collision truck collides with the test vehicle, the collision truck is provided between the collision carriage and the accelerator. A method for testing a side collision of an automobile, characterized in that the advancing of the collision carriage is stopped by the energy absorbing device and the collision carriage is prevented from colliding again with the test vehicle stopped at the rigid wall. It consists of a rigid wall, a collision carriage that collides with the side of the test vehicle placed in front of it, and an acceleration device that accelerates the collision carriage toward the test vehicle,
The collision cart and the acceleration device are connected by a pulling wire having one end connected to the energy absorbing device, and after the collision cart collides with the test vehicle, the energy absorbing device stops the forward movement of the collision cart. Car side impact test equipment.   The side collision test apparatus for an automobile according to claim 2, wherein the acceleration apparatus is a hydraulic acceleration apparatus that pushes out a piston by hydraulic pressure.   The side collision test device for an automobile according to claim 2, wherein the energy absorbing device is a device for absorbing energy by axially crushing a metal tube.   The side collision test apparatus for an automobile according to claim 2, wherein the collision carriage is provided with a braking device for preventing the collision carriage from moving backward.