KR20040009486A - A Angle-Defining Structure of Steering Wheel for Handling Test - Google Patents

Abstract

PURPOSE: Structure for keeping the angle of a steering wheel for a handling test is provided to test accurately, and to reduce the frequency of test and test time by gaining lateral acceleration repeatedly according to travel speed of a vehicle. CONSTITUTION: A handling tester is composed of a test steering wheel(1) installed on the same rotational axis as a steering wheel; a transducer(2) surrounding the center of rotation of the test steering wheel; a support bar(3) combined with the transducer and fixed to a vehicle room; an installation part(4) easily attached and detached from the portion of the test steering wheel; and a fitting rod(5) fastened to the installation part, and extended downward. The lower part of the fitting rod is bent perpendicularly and fitted to the transducer support bar. In the handling tester, the exact result of the test is obtained by keeping the rotational angle of the test steering wheel constant. The number or time of the test is reduced by gaining lateral acceleration repeatedly.

Description

A Angle-Defining Structure of Steering Wheel for Handling Test}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle holding structure of a steering test steering wheel, and more particularly, to an angle holding structure of a steering test steering wheel capable of constantly and repeatedly obtaining lateral acceleration of a vehicle.

1 shows a conventional handling test apparatus.

The vehicle handling test is a test for measuring tire handling performance by giving a steering wheel an arbitrary rotational force and rotational angle to give a prescribed acceleration or speed, and measuring the rotational force (torque) applied at this time.

As such a vehicle handling test, step steer item evaluation is typical. By applying the rotational force and the rotation angle to the steering wheel of the vehicle running in a stable state, it obtains the lateral acceleration (acceleration in the direction perpendicular to the path) specified in the test regulations, thereby handling the vehicle and tires This is a test for performance. For example, a test may be performed in which the steering wheel is turned to the left or right at the highest speed in the straight running state and maintained for 3 to 4 seconds to maintain the acceleration in the traveling transverse direction at 0.4 g. In theory, as shown in FIG. 2, when a vehicle traveling at a constant speed enters a path having a constant radius, a constant lateral acceleration (= V ² / R) is obtained. Therefore, by forming a constant speed and radius to obtain a prescribed acceleration, the steering performance can be obtained by measuring the torque of the steering wheel. Here, the acceleration may be measured by a conventional accelometer mounted on the vehicle.

In addition, as in FIGS. 1 and 5, the rotation angle and torque of the steering wheel 20 when the acceleration is obtained are measured by the transducer 2. This is made by the electrical connection between the test steering wheel 1 and the transducer 2 installed in the same rotation axis as the steering wheel 20, but since it is a commonly used part, a detailed description will be omitted and combined structure Be sure to list only. The transducer 2 is formed while wrapping the center of rotation of the test steering wheel (1), the support (3) is installed to prevent the shaking. To this end, one end of the transducer support 3 is fixed to the inside of a vehicle such as a windshield through a pressing plate (not shown), and the other end is coupled to the side of the transducer 2. . In addition, the test steering wheel 1 should be the same size as the actual steering wheel 20.

In the past, however, it was very difficult to obtain a prescribed acceleration by applying a rotational force to the test steering wheel from a stable straight state. This is because the driving force is applied to the test steering wheel purely by the driver's sense. That is, since the driver has to apply the rotational force to the test steering wheel to obtain several accelerations of the vehicle and obtain necessary data through interpolation, the distribution of the data is inevitably increased and an accurate test cannot be made.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an angle maintaining structure of a steering test steering wheel to enable accurate testing by repeatedly obtaining a prescribed acceleration of a vehicle.

1 is a perspective view showing a conventional handling test apparatus.

2 is a conceptual diagram illustrating lateral acceleration.

3 is a perspective view showing an angle maintaining structure of a steering wheel for a handling test according to the present invention.

4 is a detailed perspective view illustrating an embodiment of a mounting unit in FIG. 3.

5 is a side view illustrating a configuration in which a steering test steering wheel according to the present invention is mounted inside a vehicle.

※ Explanation of Major Drawings

1 ... Test Steering Wheel

2 ... transducer

3. Transducer Support

4. Mounting part

5 ... Hang bar

7 ... Division

20 ... steering wheel

In order to achieve the above object, the angle maintenance structure of the steering wheel for the handling test according to the present invention,

A test steering wheel installed on the same axis of rotation as the steering wheel, a transducer installed while surrounding the center of rotation of the test steering wheel, and one end coupled to the transducer and the other end fixed to the transducer support fixed inside the vehicle. In the angle maintaining structure for maintaining a constant rotation angle of the test steering wheel in the test apparatus,

A mounting part to be detachably attached to one point of the test steering wheel;

Characterized in that it comprises a locking bar extending downward in the fixed state to the mounting portion.

The lower end of the locking bar is preferably bent to be caught by the transducer support.

In addition, the mounting portion is a structure consisting of two divided pieces surrounding each point of the test steering wheel from above and below, it may be a structure in which the two divided pieces by tightening the bolts with the test steering wheel in between.

It is preferable to prevent the slip through the rubber plate on the inner surface of the mounting portion in contact with the test steering wheel.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

3 shows the angle maintaining structure of the steering wheel for the handling test according to the present invention.

At the bottom of the test steering wheel 1, a transducer 2 provided while surrounding the rotating shaft is provided. As described above, the transducer 2 is a device for calculating the torque and the rotation angle of the test steering wheel 1 and displaying the same through the display device.

In addition, as in the prior art, a transducer support 3 for maintaining the center of the transducer 2 is also provided. To this end, one end of the transducer support 3 is coupled to the transducer 2 and the other end is fixed inside the vehicle such as a windshield.

On the other hand, at one point of the test steering wheel 1, the mounting part 4 according to the present invention is detachably attached, and the mounting part 4 is provided with a locking bar 5 extending downward.

When the test steering wheel 1 is rotated, it is preferable to bend the lower end to "a" so that the locking bar 5 is caught by the transducer support 3. In this way, the locking bar 5 can be prevented from being separated from the transducer support 3.

As shown in Figure 4, the mounting portion 4 is a structure consisting of two divided pieces (7) each surrounding a point of the test steering wheel (1) from above and below, the test steering wheel (1) between the bolts, etc. The structure which tightens and couples with is preferable. However, any structure may be used as long as the configuration can be detachably attached to the test steering wheel 1. In addition, it is good to prevent the mutual slip between the test steering wheel 1 and the divided piece 7 via a rubber plate (not shown).

Accordingly, if the angle of rotation of the test steering wheel 1 with 0.4 g of lateral acceleration is known, the mounting portion 4 and the locking bar 5 are fixedly installed at a point corresponding to the angle, and the linear driving is performed. The test steering wheel 1 may be rotated by the angle so that the locking bar 5 is caught by the transducer support 3. That is, since the locking bar 5 is caught by the transducer support 3, the rotation angle of the test steering wheel 1 will not be short or exceeded.

Here, the rotation angle of the test steering wheel 1, in which the horizontal acceleration is 0.4g, is tested by moving the mounting portion 4 several times in advance, and can be easily determined by trial-and-error. have.

According to the present invention having the above-described configuration, the engaging rod fixed to the test steering wheel is configured to be caught by the transducer support, so that a predetermined lateral acceleration is accurately obtained with respect to the traveling speed of the vehicle, so that the test result is It has the advantage of being accurate.

In addition, almost constant data can be obtained no matter how many times the test is repeated, there is an advantage that the number of tests and time can be reduced, which is economical.

Claims (4)

A test steering wheel 1 installed at the same rotational axis as the steering wheel 20, a transducer 2 installed surrounding the center of rotation of the test steering wheel 1, and one end coupled to the transducer 2. In the angle holding structure for maintaining a constant rotation angle of the test steering wheel (1) in the handling test device consisting of a transducer support (3) fixed at the other end inside the vehicle, A mounting portion (4) freely detachable at one point of the test steering wheel (1); Angle holding structure of the steering wheel for the handling test, characterized in that consisting of a locking bar (5) extending downward in a fixed state to the mounting portion (4). The method of claim 1, The lower end of the locking bar (5) is angled structure of the steering wheel for the handling test, characterized in that bent to be caught by the transducer support (3). The method according to claim 1 or 2, The mounting portion 4 has a structure consisting of two divided pieces 7 which respectively surround one point of the test steering wheel 1 from above and below, and the two divided pieces 7 with the test steering wheel 1 interposed therebetween. The angle maintenance structure of the steering wheel for handling test, characterized in that the structure is coupled by tightening the bolt. The method of claim 3, An inner surface of the mounting portion (4) in contact with the test steering wheel (1) is an angle maintaining structure of the steering wheel for the handling test, characterized in that the rubber plate is interposed.