JPS6311628Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chipping simulation device for a vehicle.

Generally, when a car follows a car in front of it, pebbles thrown up by the car in front of it fly and hit the following car, causing scratches or cracks on the car's paint. and
The chipping simulation device for vehicles attempts to evaluate the strength of the coating film by reproducing the condition of flying stones and the like from the front as described above. By the way, if the paint film is scratched or cracked, water can easily seep in and cause the body to rust, so especially in cold regions, roads are sprinkled with rock salt in the winter to prevent them from freezing. This salt accelerates the above-mentioned rust. Therefore, there is a need to develop a paint with a high film strength, and at this development stage, it is necessary to reproduce the state where the paint film is damaged or cracked. In order to reproduce such a condition, it would be ideal to actually run the vehicles one after the other and perform a paint film strength test by reproducing the above-mentioned flying stone condition.
If an attempt is made to conduct a high-density test with a short inter-vehicle distance of 3 to 5 meters, there will be a great danger of collisions and the like.

Therefore, as a chipping simulation device for vehicles that can reproduce the above-mentioned flying stone condition without actually driving the vehicle, a conventional chipping simulation device was developed in Japanese Patent Application Laid-Open No. 1986-
As shown in Japanese Patent No. 67735, there was a method in which diamond particles were projected onto the coated surface of a test piece using high-pressure air at a projection speed that corresponded to the speed of flying stones while the vehicle was running. However, the state of damage to the paint film caused by such conventional equipment is quite different from that caused by flying stones when the vehicle is actually running, and tests using this conventional equipment have moved beyond the level of so-called mock tests. It was something I couldn't get.

This idea was made in view of the above situation. A tire rotation mechanism supports a pair of tires by lifting them off a base, and a drive mechanism drives the tire rotation mechanism to rotate the tires at a speed corresponding to the vehicle speed. At the same time, a hopper supplies particles into the gap between the tire and the base surface, and the particles are thrown up by the tire and collided with a stationary vehicle, thereby reducing the risk of car collision. It is an object of the present invention to provide a chipping simulation device for a vehicle that can reproduce a state closer to an actual stone-flying state without causing any problems.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention,
In the figure, 1 is a floor surface which is a base, and a pit 1a is formed on the floor surface 1 by slightly lowering the floor surface 1. On the pit 1a, a flat plate-shaped rotation mechanism mounting frame 2 is mounted on its 4th floor. The corners are supported so as to be movable in the vertical direction (vertical direction in FIG. 2b) by four vertical adjusting bolts 2a. Further, a tire rotation mechanism 3 is mounted on the mounting frame 2, and a fixed axle box 4 is fixed to the frame 2 at the center of the tire rotation mechanism 3. A transmission shaft 4a is rotatably mounted inside the box 4, and a crown gear 4b is mounted at the center of the transmission shaft 4a.
is fixed, and both ends of the transmission shaft 4a are splined. A movable axle box 5 is disposed on the left and right sides of the fixed axle box 4, and the movable axle box 5 has a lower sliding portion 5a protruding from the left and right ends of the pedestal 2. It is supported slidably left and right by the guide portion 2b, and horizontal adjustment bolts 2c are screwed into each of the sliding portions 5a, and the horizontal adjustment bolts 2c are connected to the guide portion 2b of the pedestal 2. It is rotatably fitted into a bolt support portion 2d projecting inward, so that when the horizontal adjustment bolt 2c is rotated, the movable shaft box 5 moves left and right. Further, an axle 5b is rotatably fitted into the movable axle box 5, and one end of the axle 5b is spline-fitted to one end of the transmission shaft 4a, and moves left and right together with the movable axle box 5. It's becoming possible. Further, a flange 5 is provided at the other end of the axle 5b.
c is provided on the flange 5c, and the tire 6 is fixed to the wheel portion 6a by a plurality of mounting bolts 6b.
The tire 6 is attached by being tightened with a small gap between the lower part of the outer peripheral surface of the tire 6 and the floor surface 1.

Also, the crown gear 4b of the tire rotation mechanism 3
A pinion gear 7a of a drive mechanism 7 is engaged with the pinion gear 7a, which is connected to a transmission 7c by a drive shaft 7b rotatably supported by the fixed shaft box 4, and further connected to a clutch 7d.
By operating the engine 7e and appropriately switching the transmission 7c, the tires 6 can be rotated at a desired speed.

Further, a hopper 8 is installed on the floor 1 in front of the tire 6 (on the right side in FIG. 1) with its supporting legs 8a fixed, and the upper part of the hopper 8 is formed into a cylindrical shape with a rectangular cross section. , a granule storage part 8b for accommodating granules 9 such as pebbles, the lower part of which is gradually reduced downward, and a granule guide part that guides the granules 9 into the gap between the tire 6 and the floor surface 1. It has become 8c,
A granule discharge port 8d is formed at the tip of the granule guide portion 8c so that its opening degree can be adjusted. A test vehicle 10, which is a vehicle whose coating film strength is to be tested, is placed on the floor surface 1 behind the tires 6 (to the left in the figure).

Next, the operation will be explained. First, depending on the size of the tire 6, move the frame 2 up and down using the vertical adjustment bolt 2a, adjust the axle 5b to an appropriate height, and place an appropriate space between the lower part of the outer peripheral surface of the tire 6 and the floor 1. Provide a gap. Also, horizontal adjustment bolt 2c
The movable axle box 5 of the tire rotation mechanism 3 is moved left and right, and the distance between the tires 6 at both ends of the tire rotation mechanism 3 is appropriately adjusted. At this time, the transmission shaft 4
Since a and the axle 5b are spline-fitted,
The axle 5b moves left and right together with the movable axle box 5.

Next, move the test vehicle 10 back and forth to
After adjusting the distance between the engine 7e and the tire 6,
The transmission 7c is suitably switched to rotate the tire 6 at a desired rotational speed while adjusting its rotational speed, while adjusting the opening degree of the granule discharge port 8d of the hopper 8 to obtain the desired amount. Granules 9 are supplied to the gap between the tire 6 and the floor surface 1. As a result, the particles 9 are thrown up by the tires 6 and the test vehicle 1
0, and a so-called flying stone condition is realized.

According to the device of this embodiment configured and operated in this manner, since the vehicle does not actually follow the vehicle, there is no risk of collision or the like. Moreover, as in the case of follow-up driving, the tires 6 were rotated at a desired rotational speed in front of the test vehicle 10, and the rotating tires 6 were used to kick up the particles 9 and hit the test vehicle 10, so that the actual flying stone condition could be simulated. It is possible to inflict damage on the paint film that is closer to the damage caused to the paint film by , making it possible to accurately evaluate the strength of the paint film.

As described above, according to the chipping simulation device for a vehicle according to the present invention, the tire rotation mechanism supports a pair of tires by floating them from the base, and the drive mechanism drives the tire rotation mechanism to rotate the tires. It was rotated at a desired rotational speed, and a hopper supplied particles into the gap between the tire and the base surface, and the particles were bounced up by the tire and collided with the vehicle, so that the vehicle could actually be driven. There is no danger of collisions or the like as in the case of testing, and it is possible to reproduce a stone-flying condition that is closer to the stone-flying condition when the vehicle is actually running, which has the effect of correctly evaluating the coating film strength.

[Brief explanation of the drawing]

FIG. 1 is a side view of a chipping simulation device for a vehicle according to an embodiment of the present invention, FIG. 2a is a partially sectional plan view of the embodiment, and FIG. 2b is a sectional front view. 1... Base (floor surface), 3... Tire rotation mechanism,
6...Tire, 7...Drive mechanism, 8...Hopper, 9...Particle, 10...Vehicle (test vehicle).

Claims (1)

[Scope of utility model registration request] a tire rotation mechanism that has a pair of tires at both ends and supports both tires floating on a base; a drive mechanism that is connected to the tire rotation mechanism and can freely increase or decrease the rotation speed of the tires according to the vehicle speed; A chipping device for a vehicle, comprising a hopper for supplying particles into the gap between each of the tires and the base surface, and the particles from the hopper are splashed up by the tires and collided with a stationary vehicle. simulation equipment.