JPH0446194Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a tire ground pressure and slip amount measuring device, and more specifically, it is designed to simultaneously measure the ground pressure and slip amount at the same position on the tire tread. The present invention relates to a constructed tire ground pressure and slip amount measuring device.

[Conventional technology]

Conventionally, when measuring the tire ground pressure and the amount of slippage, the measurements have been performed using separate devices. That is, a slip amount measuring device 1 as shown in FIG. 3 and a ground pressure measuring device 2 as shown in FIG. 4 have been used.

That is, the slip amount measuring device 1 shown in FIG.
A two-way slip transducer 6 supporting the slip amount measurement sensor 4 is installed, and
It is constructed by covering its periphery with a case 7.

Further, the installed pressure measuring device 2 shown in FIG. 4 similarly has a hole 9 formed in the tire grounding road surface 3 to accommodate the grounding pressure measuring sensor 8, and the periphery of the hole 9 is covered with a case 10.

[Problem that the invention attempts to solve]

There are two ways to investigate the force that a tire receives from its tread: to measure the ground pressure to find out the ground pressure distribution on the tire tread, and to measure the amount of slippage to find out the friction coefficient of the tread. be. On the other hand, in order to determine the frictional energy of the tire tread, it is necessary to measure these at the same time, and in such a measurement, it is necessary to measure both values at the same position on the tire tread.

Tire treads generally have tread grooves, and the ground contact pressure and amount of slip are different around the tire circumference, so when measuring ground pressure and amount of slip at the same time, measure these values at the same location on the tire tread. There is a need to.

However, since the conventional measuring devices were each separate as described above, in order to measure these values at the same position on the tread, it was necessary to measure the ground pressure and then aim for the same position on the tread to touch the ground. Methods have been adopted to measure the amount of slip, or to set the ground pressure and the amount of slip at the same position by arranging each measuring device out of phase and correcting the respective measured values.

However, in the former case, it is necessary to measure twice and it is difficult to measure the same position on the tread, and in the latter case, the disadvantage is that errors are unavoidable when correcting the measured values. It was hot.

[Purpose of invention]

This invention was devised by focusing on the conventional problems, and its purpose is to be able to simultaneously measure tire ground pressure and slippage at the same position on the tire tread. It is an object of the present invention to provide a tire ground pressure and slip amount measuring device that can perform highly accurate measurements with few errors caused by deviations of measurement points or correction of measured values.

[Structure of the idea]

In order to achieve the above object, this invention arranges a ground pressure measurement sensor close to the slip amount measurement sensor, and measures the ground pressure and slip amount of the tire.
The gist is that the measurements are taken simultaneously at substantially the same position on the tire tread surface.

[Effect of invention]

This device is configured as described above, and can simultaneously measure the ground pressure and slippage of the tire at approximately the same position on the tread, thereby increasing the efficiency of measurement work and achieving high accuracy with less error. It is capable of performing high-quality measurements.

[Example of idea]

Embodiments of this invention will be described below based on the accompanying drawings.

Components that are the same as those in the conventional example (FIGS. 3 and 4) are designated by the same reference numerals, and explanations thereof will be omitted.

FIG. 1 is a longitudinal sectional view of a measuring device implementing this invention, and FIG. 2 is a sectional view taken along the - arrow in FIG. A measurement sensor 4 and a circular ground pressure measurement sensor 8 arranged close to the measurement sensor 4.
is installed.

In addition, a two-way transducer 1 for measuring the amount of slip is housed in the case 12 below the slip amount measurement sensor 4 and the ground pressure measurement sensor 8.
3 and 3-way transducer 1 for ground pressure measurement
4 is connected.

As described above, in the embodiment of this invention, the ground pressure measurement sensor 8 is arranged concentrically close to the slip amount measurement sensor 4, and as a result, the ground pressure measurement sensor 8 measures the ground pressure of the tire. 8, the amount of tire slip can be measured at the same time by the amount of slip measurement sensor 4 placed at the center of the contact pressure measurement sensor 8, so there is no need to measure the amount of tire contact pressure and amount of slip separately. It is long and can perform highly accurate measurements without errors caused by shifts in measurement points or correction of measured values.

Here, in order to simultaneously measure the ground pressure and the amount of slip at the same position on the tire tread, it is necessary to make the distance between the slip amount measurement sensor 4 and the ground pressure measurement sensor 8 as small as possible, and the distance is usually about 1 mm. is set.

Therefore, the ground pressure and the amount of slip can be regarded as values at substantially the same position on the tire tread surface.

[Effect of idea]

As mentioned above, in this invention, the ground pressure measurement sensor is placed close to the sliding amount measurement sensor, so that the tire ground pressure and the amount of slip can be measured simultaneously at the same position on the tire tread. Therefore, it is possible to improve the efficiency of the measurement work, and there is also an effect that it is possible to perform highly accurate measurements with less error in measured values.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a measuring device implementing this invention, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, Fig. 3 is a sectional view of a conventional slip measuring device, and Fig. 4 is a conventional grounding device. FIG. 3 is a cross-sectional view of the pressure measuring device. 3... Tire contact road surface, 4... Slip measurement sensor, 8... Ground pressure measurement sensor.

Claims (1)

[Scope of utility model registration request] In a measuring device that measures the ground pressure and the amount of slip of a tire using a slip amount measuring sensor that measures the amount of slip on the ground contact surface of the tire and a ground pressure measuring sensor, the ground pressure is measured close to the periphery of the slip amount measuring sensor. A tire ground pressure and slip amount measuring device characterized by being equipped with a sensor.