CN101187597A - Device for measuring the impact force of running tires - Google Patents

Abstract

The object of the present invention is to provide an impact force measuring device for a running tire that measures the impact force when the running tire encounters a protrusion and is hit, and in particular can ensure that the impact force applied to the running tire is Quantitative measurement data corresponding to the position of the protrusion.

Description

Device for measuring the impact force of running tires

technical field

The present invention relates to an impact force measuring device of a running tire for measuring the impact force when the running tire encounters a protrusion and is hit, in particular, it can be ensured that it is consistent with the protrusion relative to the impact force applied to the running tire. The position corresponding to the quantitative measurement data.

Background technique

As we all know, the running tires often have the risk of being damaged due to protruding protrusions on the road surface. The current situation is that accidents occur frequently during actual driving.

As an experiment and measurement method for reproducing this kind of tire damage indoors, the most widely used is the experimental method and device introduced in SAEJ1981 "Road hazard impact test for wheel and tire assemblies". This device is a device for evaluating the resistance performance against the external impact force of the tire, and it is also an evaluation method and device for reproducing the actual accident situation.

In addition, Korea Publication No. 2006-0041329 disclosed by the present inventor in consideration of the actual use conditions with respect to the above method discloses a tire sidewall impact resistance measuring device.

Both of the above two technologies can calculate the destruction kinetic energy according to the weight of the protrusion, the arm length, the falling distance, etc., but they are not used to study the evaluation method of the impact kinetic energy under actual use conditions, and only conduct experiments through relative comparative evaluation.

On the other hand, in the case of the addition of the dynamic impact load and the dynamic impulse measurement device of the tire tread portion as the Republic of Korea Laid-Open Patent No. 2005-0120262 proposed by the present inventor, since the device measures the impact of the rotating tire indoors Therefore, there are the following disadvantages, that is, in the actual installation of the tire, there will be a certain deviation due to reasons such as camber (Camber) and toe-in (Toein).

Contents of the invention

Therefore, the object of the present invention is to provide a kind of impact force measurement device of running tire, and it can improve above-mentioned conventional problem point, when measuring tire impact force, can be transmitted by the protrusion in the actual tire running as a reference. The impact force was quantitatively measured.

In order to achieve the above object, the present invention is a device for measuring the impact force of running tires, which has a data receiving unit, and in order to apply impact force to the tire running on the road surface, a protrusion is installed in the installation groove, and a part of it protrudes toward the road surface. , and the impact force applied to the above-mentioned protrusion is input to the above-mentioned data receiving part, and it is characterized in that, the X-axis load cell for measuring the impact force in the X-axis direction is arranged in the X-axis direction on the protrusion whose part protrudes from the above-mentioned road surface; and The upper and lower lifting mechanisms are arranged together, and the Y-axis load cell for measuring the impact force in the Y-axis direction is arranged directly on the lower side of the above-mentioned protrusion in the Y-axis direction.

Description of drawings

FIG. 1 is an overall configuration diagram of an apparatus for measuring impact force of a running tire according to the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail based on the drawings.

FIG. 1 is an overall configuration diagram of an apparatus for measuring impact force of a running tire according to the present invention.

As shown in the figure, the present invention is such a device for measuring the impact force of running tires, which is provided with a protrusion 4 installed inside the installation groove 3 and partly protruding from the road surface, so as to apply impact force to the tire 2 running on the road surface 1 , and has a data receiving unit 5 that can input the impact force exerted by the protrusion 4, and is characterized in that the X-axis load cell 6 for measuring the impact force relative to the X-axis direction is arranged on the above-mentioned ground in the X-axis direction. The protrusion 4 and the Y-axis load cell 8 which is provided together with the vertical lifting mechanism 7 and measures the impact force with respect to the Y-axis direction are arranged on the lower side of the above-mentioned protrusion 4 so as to be in contact with each other in the Y-axis direction.

In addition, the above-mentioned X-axis load cell 6 and Y-axis load cell 8 are connected to the data receiving unit 5 via electric wires 9, and the impact signals of these X-axis load cells and Y-axis load cells 6, 8 can be input to the data receiving unit. Part 5.

Here, the X-axis direction refers to the traveling direction of the tire 2 during travel, and the Y-axis direction refers to the vertical direction of the tire 2 during travel.

On the other hand, in order to protect the measuring device from being damaged by the above-mentioned traveling tire 2, a protective cover is provided on the upper part of the mounting groove 3 provided with the protrusion 4 in the form of a shield so as to be in contact with the upper side of the protrusion 4. Film 10.

In addition, the protruding height of the protrusion 4 relative to the road surface 1 can be adjusted by the above-mentioned up-and-down lifting mechanism 7 , and a rolling contact mechanism such as a rolling bearing 11 is provided between the contact surface of the above-mentioned protrusion 4 and the installation groove 3 .

Next, the operation of the present invention will be described.

The projection 4 which collides with the running tire 2 of a vehicle mounted on the road surface 1 is installed in the installation groove 3, and its upper end is located at a position protruding upward from the road surface 1. The protrusion 4 can adjust the size of the impact force and the height directly related to the road surface, which is realized by adjusting the height up and down through the up and down lifting mechanism 7 .

If the running tire 2 collides with the protrusion 4 to cause a collision, then the two axis load cells connected to the protrusion 4, that is, the X-axis load cell 6 and the Y-axis load cell 8 measure the impact force, and the measured data Stored in the data receiving unit 5 .

Since the data measured in this way is the component force in two directions, the force actually applied to the tire can be calculated by the sum of the two components. For example, when the force in the X-axis direction is set as Fx, Y-axis When the force in the direction is Fy, the magnitude F of the force applied to the tire is as follows.

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; =</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="Fx"\; filenames="S2007101873062E00011.png"\; state="\{\{state\}\}">Fx</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; Fy</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}^{\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}}$

The impact force calculated as described above can be used as a basis for providing quantitative data for reference in tire impact force evaluation tests in indoor experiments.

In the running tire impact force measuring device according to this invention, since quantitative measurement data corresponding to the position of the protrusion can be secured with respect to the impact force applied to the tire during actual running, it is possible to use the data as a tire The effect of using important benchmark data in impact experiments.

Claims (4)

1. A device for measuring the impact force of a running tire, which is provided with a protrusion (4) installed inside the installation groove (3) and partly protruding from the road surface, so as to apply an impact to the tire (2) running on the road surface (1) force, and has a data receiving part (5) that can input the impact force exerted by the above-mentioned protrusion (4), characterized in that: The X-axis load cell (6) for measuring the impact force relative to the X-axis direction is arranged on the above-mentioned protrusion (4) in the X-axis direction; it is arranged together with the up-and-down lifting mechanism (7) and measures the impact force relative to the Y-axis direction. The Y-axis load cell (8) for the impact force is arranged on the lower side of the protrusion (4) so as to be in contact with each other in the Y-axis direction. 2. The impact force measuring device for running tires according to claim 1, characterized in that: on the top of the mounting groove (3) provided with the above-mentioned protrusion (4), the upper side of the protrusion (4) is connected to the upper part of the protrusion (4). way and is covered with a protective film (10) in the form of a shield. 3. The device for measuring the impact force of running tires according to claim 1, characterized in that: the above-mentioned protrusion (4) can adjust its protruding height relative to the road surface (1) through the above-mentioned up-and-down lifting mechanism (7). 4. The device for measuring the impact force of a running tire according to claim 1, characterized in that: a rolling bearing (11) is provided between the contact surface of the protrusion (4) and the mounting groove (3) as a contact mechanism.

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