JPH01257237A - Testing apparatus of vehicle - Google Patents

Abstract

PURPOSE:To improve the accuracy by allowing the center line of a vehicle to deviate from a reference line of measurement and by feeding back the amount of deviation to test data or a test procedure. CONSTITUTION:Construction is made so that the center of a coupling mechanism 5 making each pair of supporting stages 2 and 2' approach to or separate from each other symmetrically on the right and the left sides can be shifted in the direction of intersection at the right angles. Therefore the position of the center of each pair of supporting stages 2 and 2' shifts by an amount equivalent to an error, without any change in the posture forming position of wheels 10A... due to various errors. Consequently, the center line connecting a floating fulcrum C on the front wheel side corresponding to the position of the center of a tread and a floating fulcrum C on the rear wheel side coincides with the center line LC of a vehicle. By measuring the amount of shift of the fulcrum C, accordingly, the sum of the amounts of shift turns to be the amount of shift of the center line LC of the vehicle from a reference line LS of measurement, and by dividing this amount of shift by a distance between the centers of two treads, an angle of deviation is obtained. The amount of this deviation or the shift is fed back to test data or a test procedure, and thereby test data of high accuracy are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is capable of testing selected or multiple test items using a vehicle wheel as a means to be detected, each at a single wheel setting position. In particular, the vehicle center line defined as the center line connecting the tread center of the front wheels and the tread center of the rear wheels of the vehicle is deflected with respect to the measurement reference line corresponding to the direction of travel of the vehicle. The present invention relates to a vehicle testing device that allows highly accurate test data to be obtained by feeding back the deflection or deflection amount to the test data or test procedure.

``Prior art'' Conventionally, in addition to basic test items such as brakes and speed, which have been measured using the wheels of a car as the means to be detected, toe, pitch, and caster wheels have been tested to improve the handling stability of cars. , various displacements of wheels such as king pin angle, and various test items such as measurement of light distribution of headlights and taillights based on the vehicle center line between the wheels. A vehicle testing device that can measure the following test items at a single wheel setting position is known.

This type of testing device has a rear wheel measuring section A and a front wheel measuring section, the center distance of which can be changed arbitrarily in accordance with the distance between the wheel bases of the automobile, as shown in Fig. t53, for example. However, both measuring sections A and B are formed with the same configuration.

That is, to briefly explain its specific configuration based on the measurement parts A and B of -, on a base l fixed for attaching various members to be described later, there is a
A pair of rails 11 are laid parallel to each other along a direction perpendicular to the measurement reference line Ls (hereinafter referred to as orthogonal direction), and a pair of supports are placed on the rails 11 located on both sides of the measurement reference line Ls. A plurality of rollers 31 and 32 that can move toward and away from each other around the support shaft 21 provided on each of the support stands 2 and 2' sandwich the both sides of the wheel 10A. A positioning means 3 for positioning the wheels 10A is connected to each support stand 2 via the support shaft 21.
, 2'-H, and a Jl.
l! They are connected to each other so as to be able to move toward and away from each other by a link-like connecting mechanism 4' having a fixed rotation fulcrum C' on the fixed reference line Ls. As a result, the connecting mechanism 4° is connected to the positioning means 3.
By positioning each of the front wheels 10A, IOB side, and rear wheels 1OC, IOD side on the support base 2.2 degrees, each pair of wheels is moved around the fixed rotation fulcrum C° by following the positioning operation. The support bases 2 and 2 degrees are symmetrically approached and separated,
As a result, the measurement reference line LS connecting the fixed rotation fulcrum C°
and the vehicle center line Lc, and by this alignment, the various test items that are tested using the automobile wheels 10A as the detection means can be accurately tested.

"Problem to be Solved by the Invention" However, due to various manufacturing conditions in automobiles, it is not possible to manufacture the mounting positions of the wheels with high precision, and for this reason, generally speaking, mounting the left and right front wheels and the rear wheels individually causes positional errors and It includes errors such as the distance between the right wheel base 1, etc., and after attaching the car to the device with such errors included,
Even if an attempt is made to forcibly clamp and align the wheels 10A with the positioning means 3, as shown in FIG. This results in a deviation between the body center line and the vehicle center line Lc.

If these deviations occur, the wheel 10A, such as toe, camber, caster, and kingpin angle...
Various positional displacement amounts, and furthermore, measured values such as headlight and taillight light distribution measurements, etc., which are measured on the assumption that the measurement reference line S and the vehicle center line Lc are aligned to the east, become inaccurate. , it becomes impossible to perform the test with high accuracy.

In view of the drawbacks of the prior art, the present invention has been developed to solve the problem that the vehicle centerline Lc is the measurement standard due to positional errors and distance errors between the left and right wheel bases 1 when mounting the left and right wheels on the front and rear wheels respectively. To provide a vehicle testing device capable of obtaining highly accurate test data (11) which feeds back the deflection or the amount of deviation to the test data or test procedure while allowing the deflection with respect to the line Ls. aim at something.

"Means for Solving the Problem" In order to achieve the technical problem, the present invention provides a pair of support stands 2°2° provided on the front wheel side and the rear wheel side respectively.
The central rotational fulcrum of the connecting mechanism 5 that brings the two parts into contact with and separate from each other symmetrically is not the fixed fulcrum C° provided on the measurement reference line LJ, but the floating fulcrum C that can move only in the orthogonal direction. 1
As a feature of.

The second feature is that the moving amount of the floating fulcrum C, which is deflected following the approaching and separating movements of each pair of support stands 2゜2', can be directly or indirectly measured. 2.

Here, indirectly detecting the amount of movement of the floating fulcrum C means 1. For example, based on the floating fulcrum C, the amount of deviation of each support platform 2, 2' that approaches and leaves symmetrically is measured, and the difference between the constant values of Δ11 is measured. This refers to cases where the amount of movement of the floating fulcrum C is detected based on the following.

"Operation" According to this technical means, while rotating both the left and right wheels on the front wheel side and the rear wheel side, the wheels 10A...
When the positioning operation of the wheels 10A is performed while holding the both sides of the wheel 10A, the positioning means 3 swings around the support shaft 21 in accordance with the general position of the wheels 10A, and moves the front and rear wheels. The support stand 2 corresponds to the tread width on the wheel side.
2° approaches and separates along the rail.

At this time, each pair of support stands 2, 2° are connected to a connecting mechanism 5 centered on the floating fulcrum C, so they move toward and away from each other symmetrically around the floating fulcrum C. Since the floating fulcrum C is configured to be movable along the orthogonal direction, the mounting on both the left and right wheels on the front wheel 10A, IOB side and the rear wheels 100, 100 side will be subject to positional errors and the wheel bases 1 on the left and right sides. When there is an error in the pressure a, the floating fulcrum C moves in the orthogonal direction based on a vector value in the orthogonal direction corresponding to the error.

Therefore, according to this technical means, since the center of the coupling mechanism 5 that symmetrically approaches and separates the pair of support stands 2.2° is configured to be movable in the orthogonal direction, the wheels 10A and The center positions of each pair of support stands 2, 2', in other words, the center positions of the treads on the front wheel side and the rear wheel side, will deviate by an amount corresponding to the above-mentioned error, without causing any fluctuation in the overall position of... Therefore, the center line connecting the floating fulcrum C on the front wheel side corresponding to the tread center position and the floating fulcrum C on the rear wheel side coincides with the vehicle center line Lc.

Therefore, by measuring the amount of deviation of the floating fulcrum C, the sum of the amounts of deviation becomes the amount of deviation of the vehicle center line Lc with respect to the measurement reference line Ls, as shown in the following formula, and the amount of deviation is By dividing by the distance between the tread centers, the deflection angle can be obtained, and based on the deflection angle, the facing angle of the measuring device that measures the light distribution of the headlights and taillights can be corrected, and the positioning means 3 Accurate test data can be obtained by feeding back the deflection or deviation amount to the test data or test procedure, such as by compensating the measured toe value or other data based on the test data.

α=α1+αr...-T1) ω=TL/α...2) Front wheel side floating fulcrum deviation amount: αf Rear wheel side floating fulcrum deviation amount: αr Vehicle centerline measurement standard Amount of deviation with respect to the line: α Distance between both tread centers 2 TL Deflection angle: ω Embodiment A preferred embodiment of the present invention will be described in detail below by way of example with reference to one drawing. However, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of the components described in this example are not intended to limit the scope of this invention, but are merely illustrative examples. It's nothing more than that.

FIG. 1 is a schematic plan view showing a composite testing device for an automobile according to an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of the main parts thereof.

This embodiment has a rear wheel measuring section A and a front wheel measuring section B, the distance between the centers of which can be changed arbitrarily in accordance with a distance corresponding to the distance between the wheel bases of a car, and each of the measuring sections A ,
B includes a pair of rails 11 laid on a fixed base l as described above, and a pair of supports 2, 2° placed on both sides of the rails with the measurement reference line Ls in between,
A vertical support shaft 21 rotatably supported on the support stands 2, 2', and a wheel 10A fixed to the vertical support shaft 21-H.
The rollers 31, 32, 33 sandwiching both sides of the positioning means 3 are configured to be able to approach and separate from each other around the support shaft 21, and the pair of support stands 2.2'+153 are moved around the floating fulcrum C. 5. A movable connection mechanism called an "equalizer" that connects left and right symmetrically so that it can be moved toward and away from the left and right. A linear gauge 6 for detecting the amount of movement of the floating fulcrum C, a pair of juxtaposed rollers 7A for mounting wheels 10A... on each support stand 2, 2°,
7B and Karana Ru.

Above the support base 2, 2 degrees, there is a support shaft 2 at the center of the shaft.
1 is rotatably supported vertically, and has a rotational displacement detection means 22 consisting of a perforated disc 22a and a photointerrupter 22b at the lower end of the support shaft 21, and a guide rail 23 at an intermediate position thereof. Further, a rotary rod "tea" which can be rotated in the horizontal direction is fixedly or pivotally supported at the upper end of each of the rods.

Next, the structure of the positioning means 3 including these members will be explained in detail. On the turntable 24, there is an L-shaped support arm 25 that is slidable along the guide rail 23.
is arranged so as to protrude upward from the bottom of the space 30 sandwiched between the juxtaposed rollers 7A and 7B.

The support arm 25 has an abdominal part sandwiched between the juxtaposed rollers 7A and 7B reduced in width, is formed to be swingable within the space area 30, and has a rotary rod lea fixed to the support shaft 21.
Swing rods 16b and lee are connected between both ends and the bottom of the support arm 25.
The support arm 25 is configured to be movable toward and away from the guide rail 23 by a link-shaped connecting member 1B made of the rod group, and the support arm 25 is supported by an air cylinder 13 connected to a turntable 24. is configured to be able to swing in the horizontal direction. The support shaft 21 is configured to be able to be positioned at the center n between the pair of rails 11, and the support shaft 21 is located at the center position n between the pair of rails 11.

The distance between the centers of the rails 11 provided on the 10B side and the rear wheels 10G and 100 sides is set to be equal to the distance between the wheel bases of the automobile.

Further, an upper plate 15 is fixed to the upper end of the support arm 25 in parallel with the guide rail 23, and a wheel + OA・
・Roller members 31, 32°3 so as to face the side wall surface
Install 3. and first and second roller members 31.
32 is arranged symmetrically along the direction orthogonal to the guide rail 23 and tilted at a predetermined angle in the circumferential direction of the wheel 10A, and extends vertically upward from the third roller member 33, and is operated by an air cylinder (not shown). wheel 10
A: Constructed so that it can be collapsed in a direction away from the side wall surface.

On the other hand, the coupling mechanism 5 that connects the pair of support stands 2, 2 degrees symmetrically so as to be able to move toward and away from each other includes a rotating rod 52 having a rotation fulcrum C on a moving table 51 located approximately on the measurement reference line Ls. , consisting of bar-shaped rods 53 and 54 that are rotatably supported between both ends of the movable base 51 and the support bases 2 and 2 degrees, and the movable base 51 is positioned approximately at the measurement reference line Ls on the rail 55 extending in the orthogonal direction. By arranging it at a position that coincides with the above, the central rotation fulcrum of the coupling mechanism 5 can be used as a floating fulcrum C that is movable only in the orthogonal direction.

A linear gauge 8 fixed on the base 1 is attached to the side wall surface of the movable base 51, and the linear gauge 8 moves the floating fulcrum C from the measurement reference line Ls in the orthogonal direction via the movable base 51. The amount of deviation can be measured.

The juxtaposed rollers 7A, 7B are arranged parallel to the rail, and are rotatably supported by a frame or the like via a roller shaft, and each roller 7A, 7B is connected to a rotation speed detector or a motor (not shown). and a braking force detector, etc., respectively, so that brake and speed tests can be performed respectively. Since such a configuration is not the gist of the present invention, its explanation will be omitted.

According to such an embodiment, the juxtaposed rollers? After performing brake and speed tests using A and 7B, the support arm 25 is
When approaching the wheel side wall surface 10a along the guide rail 23, the support 111ii25 on the other side also approaches the other side wheel side wall surface tob side via the connecting member 1B, and the - roller member 31 approaches the wheel side wall surface IQa. after coming into contact with.

This is because the connecting member 1B is formed of a link member.

The other roller member 32 swings in the horizontal direction with respect to the wheel side wall surface, and following this, the rotating shaft 21 fixed to the turntable 24 via the support arm 25 rotates, and the rotating shaft 21 attached to the lower end thereof rotates. The displacement detection means 22 can measure the amount of rocking displacement of the support member 3.4, in other words, the degree of inclination called toe of the wheels 10A, and furthermore, the roller member 33 standing vertically can be measured in the vertical direction. By configuring it to be swingable, the vertical inclination of the wheels 10A can also be measured.

Then, when the wheels IOA... are sandwiched between the first and second roller members 31, 32, each pair of support stands 2, 2° is connected to the connecting mechanism 5 centered on the floating fulcrum C.
Since the floating fulcrum C is connected to the left and right wheels, it is symmetrical in that the supporting bases 2, 2° move away from each other in the orthogonal direction along the rail 11, while being deviated based on positional errors etc. The above-described effects of the present invention can be smoothly achieved by J1\, which moves in the direction and measures the amount of deviation based on the linear gauge 6 at the end of the movement and rotation.

``Effects of the Invention'' As described above, according to the present invention, the vehicle centerline is distorted due to positional errors and distance errors between the left and right wheel bases when mounting the left and right wheels on the front and rear wheels respectively. By allowing the deflection with respect to the measurement reference line and feeding back the amount of deflection to the test data or test procedure, highly accurate test data can be obtained.

It has various effects such as

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a composite testing device for an automobile according to an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of the main parts thereof. FIG. 3 is a schematic plan view showing a conventional automobile composite testing device. Patent applicant: Anzen Jidosha Co., Ltd. Figure 2 cLs

Claims (1)

[Claims] 1) In a vehicle testing device that is capable of testing one or more selected test items using a vehicle wheel as a detection means at a single wheel setting position, a guide member that approaches and separates from the support shaft is used. a positioning means that positions the wheel while holding both sides of the wheel; a support base that supports the positioning means so as to be swingable about a support shaft;
A connection configured to allow the pair of support stands provided on the front wheel side and the rear wheel side to be symmetrically moved toward and away from each other along a direction perpendicular to a measurement reference line corresponding to the direction of travel of the vehicle (hereinafter referred to as the orthogonal direction). and a central rotation fulcrum of the coupling mechanism is configured as a floating fulcrum that is movable only in the orthogonal direction, and a floating fulcrum that deflects each pair of supports following the approaching and separating movements. A vehicle testing device characterized by being configured to be able to directly or indirectly measure the amount of movement.