KR100207964B1 - A testing apparatus for a tire - Google Patents

Abstract

The present invention relates to an experimental apparatus for observing the water film phenomenon generated between the road surface and the tire during rain driving of the vehicle, the moving plate 9, the spring 13 and the damper 12 for damping vibration and shock through Wheel shaft 11 fixed to movable plate 9, double link 10 for adding slip angle and camber angle to wheel shaft 11, and two directions of force applied to wheel shaft 11 to wheel shaft 11 2 axis load cell (15) for detecting the movement, Shanghai conveying apparatus (8) for moving the movable plate (9) up and down, the tire (18) fixed to the wheel shaft 11 and the glass plate (6) and the ground plate (6) An image measuring device (16) for photographing the water film state of the tire (18) grounded at the ground, a water tank (1) having a return hole (1a), and water stored in the water tank (1) are pumped into the high pressure tank (4). The high pressure water of the high pressure tank 4 and the high pressure tank 4 in which the water pumped by the pump 3 and the pump 3 are stored at high pressure are grounded to the glass plate 6. From the injection nozzle 5 sprayed on the ear 18 side, the purifier 7 for removing the foreign matter contained in the water flowing into the return hole 1a of the water tank 1, and from the image measuring device 16, Since the structure is composed of an analysis device 17 for analyzing the input image, it is possible to experiment with water film in a small space indoor, so all-weather experiment is possible regardless of the external environment, and also various conditions are easy and the measurement is made accurately. It is now possible to more accurately observe the factors of the mening phenomenon.

Description

Tire water film tester

The present invention relates to an experimental apparatus for observing the water film phenomenon generated between the road surface and the tire during rain driving of the vehicle, in particular, it is possible to test the water film in a small space indoors, and all-weather experiments can be performed regardless of the external environment. The present invention relates to a hydromechanical testing apparatus for tires, which is capable of observing more precisely the factors of hydromechanical phenomenon because of easy conditioning and accurate measurement.

As is well known, a water film is generated between the road surface and the tire during rain driving of the vehicle, and when such a water film phenomenon occurs largely, the ground of the road surface and the tire becomes unstable and the vehicle slips, so that the steering and stopping performance is greatly reduced. Therefore, a problem that acts as a major factor in accidents such as a collision occurred.

Therefore, minimizing the water film phenomenon so that the grounding is stable is an important factor in evaluating tire performance. Therefore, the water film experiment for observing the water film phenomenon of the tire during rainy driving of the vehicle is important. ought.

Conventional water film experiments have been carried out by making a roadway on the outside, digging a hole at a certain position of the roadway, installing a camera and a sensor in this hole, and covering the road surface of the glass plate on the upper surface of the open hole outside. In this state, the water is sprayed a certain height on the driving path, and the driver is to drive the vehicle directly at a high speed. The time when the tire passes the glass plate is detected by a sensor, and the control device receives the signal from the sensor. The filming experiment is made visible by operating the camera at.

However, according to the prior art, since a driving path for driving a vehicle is required, a large space is required, and since the experiment is performed outside, it is difficult for the experiment in winter, etc., and it is virtually impossible to reproduce the same experimental conditions, and high-speed driving There was a problem that the precise check is not made because the vehicle was taken at the moment.

In addition, since the driver has to drive the vehicle directly, there is a problem that the driver may be injured due to an accident such as a collision due to the presence of an accident.

Therefore, the present invention was invented to solve the above problems, it is possible to test the water film in the room of a small space so that all-weather experiments are possible regardless of the external environment, and also various conditions are easy to measure and the measurement is made accurately. It is an object of the present invention to provide a tire hydromechanical testing apparatus for more precisely observing the hydromechanical phenomenon.

1 is a schematic configuration diagram of a water film test apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Water tank 1a: Return hole

2: suction pipe 3: pump

4: high pressure tank 5: injection nozzle

6: glass plate 7: purifier

8: Shanghai transport device 9: mobile plate

10: double link 11: wheel axle

12 damper 13 spring

14: guide rod 15: 2-axis load cell

16: image measuring instrument 17: analysis device

18: tire 19: dead weight

The present invention for achieving the above object is a wheel shaft fixed to the movable plate via a moving plate, a spring and a damper for damping vibration and shock, a double link to add a slip angle and a camber angle to the wheel shaft, the wheel shaft 2-axis load cell installed to sense the force in two directions applied to the wheel shaft,

Shanghai transport device for moving the moving plate up and down, tires fixed to the wheel shaft and the glass plate grounded, an image measuring device to photograph the water film state of the tire grounded on the glass plate, a water tank with a return hole, water stored in the water tank The pump pumped to the tank, the high pressure tank where the water pumped by the pump is stored at high pressure, the injection nozzle for spraying the high pressure water of the high pressure tank to the tire side grounded on the glass plate, and the water flowing into the return hole of the water tank And a purifying apparatus for removing the foreign matter and an analyzing apparatus for analyzing the image input from the image measuring instrument.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a water film test apparatus according to the present invention. According to this, the wheel shaft 11 is connected to the moving plate 9 by means of a spring 13 and a damper 12 for damping vibration and impact. A double link 10 for fixing a slip angle and a camber angle to the wheel shaft 11 and a biaxial load cell 15 for sensing a force in two directions applied to the wheel shaft 11 are provided. The shanghai conveying apparatus 8 which moves 9) up and down is provided. In addition, an upper surface of the base is provided with a tire 18 fixed to the wheel shaft 11 and a glass plate 6 which is grounded, and an image measuring device 16 for photographing the water film state of the tire 18 below the glass plate 6. Is installed, and the image measuring device 16 is connected to an analyzing device 17 for analyzing an image. On the other hand, the suction pipe 2 is installed in the water tank 1 in which the return hole 1a is formed, and the pump 3 for pumping the water stored in the water tank 1 into the high pressure tank 4 and the pump ( The high pressure tank 4 in which the water pressurized by 3) is stored at high pressure, and the injection nozzle 5 which injects the high pressure water of the high pressure tank 4 to the tire 18 side grounded at the glass plate 6 are Are connected sequentially.

Therefore, the dead weight 19 according to the experimental load value is placed on the movable plate 9, and the wheel shaft 11 connected to the movable plate 9 is lifted upward by operating the shanghai conveying device. The tire 18 is inserted into and fixed to the tire 18, and when the moving plate 9 is lowered by operating the shanghai conveying apparatus, the tire 18 is placed on the glass plate 6. In this state, when the spray nozzle 5 is opened and high pressure water is sprayed, water is introduced into the interface between the tire 18 and the glass plate 6 to generate lift force on the tire 18. The lift force applied to the tire 18 is applied. Are divided into fz and fx, and each lift is measured from the formula fz = static load (Fz)-load after water injection (Fz '), fx = static load (Fx)-load after water injection (Fx'). On the other hand, it is possible to objectively and accurately evaluate the difference in lift caused by the ground shape of the tire 18 before and after the water spray input to the image measuring device 16, it is easy to reproduce the same experimental conditions to repeat the experiment This improves the accuracy of the measurement.

In addition, when using the water film experiment apparatus according to the present invention, it is easy to apply various experimental conditions, it is possible to more accurately determine the acceptance of the water film phenomenon.

On the other hand, in the case of installing the reflector in place of the glass plate 6, it is possible to observe the eye, the analysis device 17 may be a computer or the like, the water tank 1, the purification device 7 is provided It is installed to remove the foreign matter contained in the water flowing into the return hole (1a).

According to the present invention as described above, it is possible to test the water film in a small space indoors, all-weather experiments are possible regardless of the external environment, and various conditions are easy to measure, and the measurement is made accurately, thus more precisely the factors of the water film phenomenon. Obviously, it is not necessary for the driver to drive the vehicle directly as mentioned in the related art, thereby preventing the risk of an accident such as a collision.

What has been described above is only one embodiment of the present invention, and the present invention is not limited to the above-described embodiment, and is not ordinary in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with knowledge will be able to make various changes.

Claims (1)

A wheel shaft 11 fixed to the moving plate 9 via a moving plate 9, a spring 13 and a damper 12 that dampen vibration and shock, and a slip angle and a camber angle are added to the wheel shaft 11. A double link 10, a biaxial load cell 15 mounted on the wheel axle 11 to sense a force in two directions applied to the wheel axle 11, and a shanghai transport device for moving the moving plate 9 up and down 8. ), The image measuring unit 16 and the return hole 1a for photographing the water film state of the tire 18 fixed to the wheel shaft 11 and the glass plate 6 grounded to the ground, and the tire 18 grounded to the glass plate 6. The formed water tank 1, the pump 3 for pumping the water stored in the water tank 1 into the high pressure tank 4, and the high pressure tank 4 in which the water pressurized by the pump 3 is stored at high pressure. , The injection nozzle 5 for injecting the high pressure water of the high pressure tank 4 to the side of the tire 18 grounded to the glass plate 6, and the water flowing into the return hole 1a of the water tank 1. Purification plant to remove foreign substances 7 and, the water film of the tire test device consisting of analyzer 17 to analyze the image received from the image measuring devices (16).

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