JP4157011B2 - Vehicle towing device for side impact test - Google Patents

Description

  The present invention relates to a vehicle traction device for a side collision test.

Today, vehicle crash safety testing is indispensable to prove vehicle reliability. In addition, various test methods have been implemented as a collision safety test. A barrier collision test in which a test vehicle is accelerated to a predetermined collision speed and collides with a fixed wall (barrier) made of concrete or the like is performed. Because of its good reproducibility, it is widely used for measuring the collision safety of actual vehicles.
FIG. 4 shows an example of a conventional vehicle traction device used when a side collision test of a vehicle is performed. This vehicle traction device is provided with a dolly 4a, 4b that moves forward and backward along the guide rail 2 with the guide rail 2 disposed in the center of the runway 1 that extends in the direction of movement of the test vehicle 9 during the test. Each of the dollies 4a and 4b can be clamped to the power wire 3 at an arbitrary position.

When a vehicle side impact test is performed, tires are placed on the vinyl chloride sheet rails 6 laid on both sides of the guide rail 2 with the center in the front-rear direction of the test vehicle 9 aligned with the guide rail 2. . Further, the dolly 4a is arranged in front of the test vehicle 9 in the moving direction, and the wire 10a is hung from the dolly 4a to the wheel in front of the test vehicle 9 in the moving direction. On the other hand, the dolly 4b is arranged behind the test vehicle 9 in the moving direction, and the wire 10b is hung from the dolly 4b to the wheel behind the test vehicle 9 in the moving direction. Then, while adjusting the tension of the wires 10a and 10b to be uniform by the rear dolly 4b, the vehicle is pulled by the front dolly 4a and the test vehicle 9 is accelerated toward the barrier. (For example, refer to Patent Document 1.)
Various inventions have also been made on the structure of the guide rail and the pulling dolly (see, for example, cited document 2 and cited document 3).

JP 2001-147173 A (page 4-5, FIG. 1, FIG. 2) Japanese Utility Model Publication No. 1-167640 (FIGS. 1 to 3) JP 2003-65889 A (Page 4-5, FIG. 1)

  However, the following problems have been pointed out in conventional vehicle traction devices. First, since the test vehicle 9 is adjusted so that the tension of the wires 10a and 10b is made uniform by the rear dolly 4b, when pulling the test vehicle 9 by the front dolly 4a, the posture of the vehicle body is adjusted. Is stable. However, since the barrier is on the extension line in the pulling direction of the test vehicle 9, it is necessary to separate the front dolly 4a from the test vehicle 9 immediately before the barrier. At this time, since it is necessary to consider the stop distance of the dolly 4a, it is necessary to separate the dolly 4a from the test vehicle 9 at least 5 to 6 m before the barrier (in FIG. 4, reference numeral 5a denotes the front side). The detaching device for the dolly 4a is indicated by the reference numeral 5b, and the detaching device for the rear dolly 4b is shown. Therefore, after the detachment of the dollies 4a and 4b, the test vehicle 9 loses the restraint in the traveling direction, and the posture is easily changed by an external force such as a small moment or friction, and the desired positional accuracy with respect to the barrier is obtained. It becomes difficult to make the test vehicle 9 collide.

For example, in the pole side impact test such as FMVSS (Federal Motor Vehicle Safety Standard: USA), the positional accuracy is defined within ± 1 cm. However, in the conventional vehicle towing device, this positional accuracy is actually satisfied. It has become difficult.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a traction device capable of maintaining the stability of the attitude of a side collision test vehicle until just before the collision with the barrier. And to improve the accuracy of the side impact test.

In order to solve the above-mentioned problem, a vehicle traction device for side collision test according to claim 1 of the present invention is configured to use a dolly pulled by driving means installed inside a floor surface for testing a vehicle for side collision test. It is arranged only in the rear in the moving direction, and an arm for pushing the vehicle is attached to the dolly, and an attachment for applying a pushing force to the vehicle while maintaining a desired posture of the vehicle is provided on the arm. It is what.
According to the present invention, the dolly is arranged only at the rear in the moving direction at the time of the test of the side collision test vehicle, the arm for pushing the vehicle is attached to the dolly, and the attachment of the vehicle is further provided with the attachment provided on the arm. By pushing the vehicle while maintaining the desired posture, the test vehicle can be pushed out from the rear in the moving direction and accelerated. Here, since the dolly is arranged only in the rear of the test vehicle in the moving direction at the time of the test, even if the dolly is separated from the test vehicle in consideration of the stop distance of the dolly, the test vehicle is sufficient for the barrier. Since the test vehicle is separated from the dolly, the test vehicle can collide with the barrier without causing a change in posture due to the influence of external force.

According to a second aspect of the present invention, there is provided a side traction test vehicle traction device according to the first aspect, wherein the attachment is inserted into a coupling hole provided on a vehicle body side. Shaped insertion pin.
According to the present invention, the attachment for applying the pushing force to the vehicle while maintaining the desired posture of the vehicle is a conical insertion pin that is inserted into the coupling hole provided on the vehicle body side. The previous setting work can be facilitated. Further, by suddenly stopping the dolly, only the vehicle continues to move forward due to the inertial force, and the insertion pin comes out of the coupling hole, so that the attachment and the test vehicle can be easily separated.

According to a third aspect of the present invention, there is provided a side traction test vehicle traction device according to the first aspect of the present invention, wherein the side traction test vehicle traction device comprises two or more attachments.
As described above, when the arm includes two or more attachments, it is possible to apply a pushing force to the test vehicle while more reliably holding a desired posture of the test vehicle.

According to a fourth aspect of the present invention, there is provided a side impact test vehicle traction device according to any one of the first to third aspects, wherein the arm is forward of the dolly. In an inclined state, the attachment is attached so that the inclination angle can be changed, and the attachment is attached so that the inclination angle with respect to the arm can be changed.
According to the present invention, by changing the inclination angle of the arm and also changing the inclination angle of the attachment to the arm, the pushing force acts on the center of gravity position of the test vehicle from the attachment attached to the arm. Therefore, it is easy to adjust the contact position of the attachment with respect to the test vehicle. Then, by applying the pushing force to the position of the center of gravity of the test vehicle, it is possible to accelerate the test vehicle in a stable state.

According to a fifth aspect of the present invention, there is provided a side impact test vehicle traction device according to any one of the first to fourth aspects, wherein the arm has a V-shape. A vertex portion is attached to the dolly, and the attachments are provided at both ends thereof.
According to the present invention, the driving force of the dolly is transmitted to the arm by attaching the apex portion of the V-shaped arm to the dolly, the attachments are provided at both ends of the arm, and the two attachments are used for testing. By applying the pushing force to the vehicle, it is possible to accelerate the test vehicle while more reliably holding the desired posture of the test vehicle.

  Since the present invention is configured as described above, the stability of the posture of the side collision test vehicle can be maintained until immediately before the collision with the barrier, and the accuracy of the side collision test can be further increased.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
In FIG. 1, the top view of the vehicle traction apparatus for the side collision test which concerns on embodiment of this invention is shown. FIG. 2 shows a side view of the traction device.

This traction device lays a guide rail 12 on a test floor 11 and moves a dolly 13 to be pulled by a driving means (wire, cylinder, etc.) installed inside the floor of the test floor 11 to a vehicle 14 for side impact testing. It is arranged only at the rear of the moving direction during the test. Further, the dolly 13 is provided with an arm 15 for pushing the test vehicle 14, and the arm 15 is provided with an attachment 16 for applying a pushing force to the vehicle while maintaining a desired posture of the vehicle 14. . A barrier 17 is provided on the extension line of the guide rail 12.
Note that the floor surface of the test floor 11 is finished flat, and the test vehicle 14 can slide on the floor surface of the test floor 11 by coating the surface thereof with wax or the like. Yes. However, as in the conventional example, a vinyl chloride seat rail or the like may be laid on the test floor 11, and the test vehicle 14 may slide on the test floor 11.

By the way, the arm 15 is attached to the dolly 13 so as to be inclined forward and the inclination angle can be changed. The arm 15 is V-shaped, and its apex portion 15a is attached to the dolly 13 via a horizontal rotating shaft. A rotating shaft that pivots the arm 15 on the dolly 13 has a sufficient strength so that the arm 15 does not fall off when the dolly 13 is suddenly stopped as will be described later. Attachments 16 are attached to both end portions 15b of the arm 15. Further, both end portions 15b of the arm 15 are fixed to each other by the reinforcing member 15c, so that the arm 15 has an approximately isosceles triangle.
Further, the attachment 16 attached to both ends 15b of the arm 15 has a coupling hole 14a provided on the vehicle body side (as shown in an enlarged view in FIG. 3). A conical insertion pin 16a is provided. Further, a flange 16b is provided at the base end portion of the insertion pin 16a, and this flange 16b is brought into direct contact with the vehicle body panel of the test vehicle to give an extrusion force to the test vehicle 14. Further, the base end portion 16 c of the attachment 16 is attached to the arm 15 via a horizontal rotation shaft 18.
Then, the inclination angle of the arm 15 with respect to the dolly 13 is changed according to the position of the coupling hole 14a which varies depending on the test vehicle, the insertion pin 16 of the attachment 16 is inserted into the coupling hole 14a, and the flange 16b is in close contact with the vehicle body panel. It becomes possible to make it.

  In addition, the position of the coupling hole 14a is such that the extension line connecting the apex portion 15a of the arm 15 and the vehicle center of gravity of the test vehicle 14 is the moving direction during the vehicle test (indicated by arrows in FIGS. Are drilled in the vehicle body panel of the test vehicle 14 so as to be parallel to each other. As a result, the pushing force is equally applied to the front and rear of the vehicle. Further, the position of the coupling hole 14a in the height direction is also perforated in the vehicle body panel of the test vehicle 14 so that the pushing force can be applied to the position of the center of gravity of the test vehicle 14 from the attachment 16.

  According to the embodiment of the present invention configured as described above, the following operational effects can be obtained. First, in the side collision test vehicle traction device, the dolly 13 is arranged only at the rear of the test vehicle 14 in the moving direction during the test, and the arm 15 for pushing the test vehicle 14 is attached to the dolly 13, The test vehicle 14 can be pushed out from the rear in the moving direction and accelerated by pushing the test vehicle 14 while holding the desired posture of the test vehicle 14 with the attachment 16 provided on the arm 15. Since the dolly 13 is arranged only behind the test vehicle 14 in the moving direction at the time of the test, the test vehicle 14 remains the barrier 17 even if it is separated from the test vehicle 14 in consideration of the stop distance of the dolly 13. Thus, the test vehicle 14 can collide with the barrier 17 without causing a change in posture due to the influence of external force after being disconnected from the dolly 13.

  For example, as shown in FIG. 1, the distance A from the dolly 13 to the test vehicle 14 in the state through the arm 15 is 4 m. In this case, if the dolly 13 is stopped when the distance L from the barrier 17 to the dolly 13 is 6 m, the distance B from the rear side in the traveling direction of the test vehicle 14 to the barrier 17 is 2 m. Here, if the vehicle body width W of the test vehicle 14 is 1.7 m, the distance C between the front side surface in the traveling direction of the test vehicle 14 and the barrier 17 is only 0.3 m. Therefore, it is possible to cause the test vehicle 14 to collide with the barrier 17 while maintaining high position accuracy without causing a change in posture due to the influence of external force.

In addition, since the attachment 16 is a conical insertion pin 16a that is inserted into the coupling hole 14a provided on the vehicle body side of the test vehicle 14, the setting work prior to the test can be performed using the insertion pin 16a as the coupling hole 14a. It is completed only by inserting, and work such as tying a wire to the vehicle body is unnecessary as in the conventional case. Therefore, the setting work can be facilitated.
Furthermore, after accelerating the test vehicle 14, the dolly 13 is suddenly stopped, so that only the test vehicle 14 keeps moving forward due to inertial force, and the insertion pin 16a comes out of the coupling hole 14a. The separation work from the vehicle 14 can be easily performed.

Further, the coupling hole 14a is formed in consideration of the position of the center of gravity of the test vehicle 14, and the inclination angle of the arm 15 is changed according to the position of the coupling hole 14a, and the inclination angle of the attachment 16 with respect to the arm 15 is also changed. Therefore, the abutment position of the attachment 16 with respect to the test vehicle 14 is set so that the pushing force can be applied to the position of the center of gravity of the test vehicle 14 from the attachment 16 attached to the arm 15. It is easy to adjust.
The pushing force is applied to the center of gravity position of the test vehicle 14 to maintain the desired posture of the test vehicle 14, that is, a posture that can be stably accelerated without disturbing the position accuracy. However, the test vehicle 14 can be accelerated.

  Moreover, by attaching the apex portion 15 a of the V-shaped arm 15 to the dolly 13, the driving force of the dolly 13 is transmitted to the arm 15, and attachments 16 are provided at both ends 15 b of the arm 15. By applying the pushing force to the test vehicle 14, the test vehicle 14 can be accelerated while the desired posture of the test vehicle 14 is more reliably maintained.

If the position of the center of gravity of the test vehicle 14 can be grasped more accurately, one arm is used instead of the V-shaped arm 15, and one attachment 16 is attached to the tip of the arm. Even when the attachment 16 is inserted into one coupling hole 14a formed aiming at the center of gravity of the test vehicle 14, the pushing force is applied to the test vehicle 14 while maintaining the desired posture of the test vehicle 14. It becomes possible to grant.
Also, even if the inclination angle of the arm 15 with respect to the dolly 13 is fixed and a different attachment 16 for each test vehicle 14 is attached to the arm 15 so as to be replaceable, the pushing force against the center of gravity position of the test vehicle 14 This makes it possible to stabilize the posture of the test vehicle 14. Further, even if the arms 15 and the attachments 16 having different inclination angles are attached to the dolly 13 so as to be exchangeable for each of the different test vehicles 14, the same operational effects can be obtained.

It is a top view of the vehicle traction device for side collision tests concerning an embodiment of the invention. It is a side view of the vehicle traction device for a side collision test shown in FIG. It is an enlarged view which shows the attachment attached to the both ends of the arm of the vehicle traction apparatus for a side collision test shown in FIG. It is a top view of the conventional vehicle traction device used when performing the side collision test of a vehicle.

Explanation of symbols

11: test floor, 12: guide rail, 13: dolly, 14: vehicle for side impact test, 14a: coupling hole, 15: arm, 15a: apex, 15b: both ends, 16: attachment, 16a: insertion pin, 18: Horizontal rotation axis

Claims (5)

The dolly pulled by the driving means installed inside the floor surface is arranged only at the rear in the moving direction during the test of the side collision test vehicle, and an arm for pushing the vehicle is attached to the dolly, A vehicle traction device for a side collision test, comprising an attachment for applying a pushing force to the vehicle while maintaining a desired posture of the vehicle. 2. The vehicle traction device for a side collision test according to claim 1, wherein the attachment is a conical insertion pin that is inserted into a coupling hole provided on a vehicle body side. The vehicle traction device for a side collision test according to claim 1, comprising two or more attachments. The arm is attached to the dolly so as to be tilted forward and the tilt angle is changeable, and the attachment is attached to be capable of changing the tilt angle with respect to the arm. The vehicle traction device for a side collision test according to any one of claims 1 to 3. 5. The vehicle traction for a side collision test according to claim 1, wherein the arm has a V shape, a vertex portion of the arm is attached to the dolly, and the attachments are provided at both ends thereof. apparatus.

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