JP2868212B2 - Vehicle test equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle test apparatus in which one or a plurality of test items can be tested by placing a vehicle at a predetermined position, and more particularly to a front wheel of a vehicle. The vehicle center line defined as the center line connecting the center of the tread of the rear wheel and the center of the tread of the rear wheel is allowed to deflect with respect to the measurement reference line corresponding to the traveling direction of the vehicle, while the vehicle center line is deflected or deflected. The present invention relates to a vehicle test device capable of obtaining an order.

Conventional technology Conventionally, in addition to basic test items such as braking and speed, various positional displacements of wheels such as a toe, a camber, a caster, and a kingpin angle for improving driving stability of a vehicle, Further, one or a plurality of selected test items from among various test items such as headlight extinguishing and light distribution measurement of a taillight performed based on the vehicle center line between the wheels are measured at a single wheel setting position. Enabled vehicle testing devices are known.

This type of test apparatus has a rear wheel measuring unit A and a front wheel measuring unit B that can arbitrarily change the center-to-center distance corresponding to the distance between the wheel bases of an automobile as shown in FIG. 3, for example. The measuring sections A and B are formed with the same configuration.

Then, the specific configuration will be briefly described based on the measuring units A and B. On a base 1 fixed for mounting various members described later, a measurement reference line Ls orthogonal to the traveling direction of the vehicle is provided. Along a direction (hereinafter referred to as an orthogonal direction), a pair of rails 11 and 11 are laid in parallel with each other, and a pair of support bases 2 and 2 are disposed on the rails 11 and 11 located on both sides of the measurement reference line Ls. 2 ', a left and right movable floating table (not shown) is arranged on the support base for mounting wheels, and a support shaft 21 provided on each of the support bases 2 and 2'.
The wheels (1A, 10B, 10C, 10D) are pinched by a plurality of rollers 31 and 32
0A, 10B, 10C, and 10D) are pivotally supported on the support bases 2 and 2 'via the support shaft 21 so as to be swingable, and the pair of support bases 2 and 2' are supported. The distance between the fixed rotation fulcrum C ′ on the measurement reference line Ls called an “equalizer”
Are connected so as to be able to freely contact and separate by a link-shaped connecting mechanism 4 ′ having

As a result, the connecting mechanism 4 'connects the front wheels 10A, 10B and the rear wheels 10C, 10D to the support bases 2,
Following the clamp operation by clamping on 2 ', the pair of support bases 2 and 2' come and go symmetrically about the fixed rotation fulcrum C 'and the rollers 31 and 32.
, The wheel is pushed, whereby the fixed rotation fulcrum C '
Automatically aligns the measurement reference line Ls connecting the vehicle center line Lc with the vehicle center line Lc.
A, 10B, 10C, and 10D) can be accurately inspected for the various test items to be inspected using the means to be detected.

[Problems to be Solved by the Invention] However, automobiles cannot accurately manufacture the mounting positions of the wheels due to various manufacturing conditions, and therefore, generally, mounting position errors between the left and right front wheels and the rear wheels, and the left and right sides. The wheel base distance error and the like are included, and after placing the vehicle on the device in a state including such an error,
Even if the clamping means 3 tries to forcibly hold and align the wheels (10A, 10B, 10C, 10D), the amount of alignment of the vehicle becomes larger than the above condition, and the support base moves orthogonally to the reference line Ls. On the other hand, the vehicle requests circular motion about the intersection of Ls and Lc.

In addition, in addition to the amount of alignment movement of the support platform orthogonal to the reference line Ls, the approach angle of the vehicle and the above error are added. For example, when the vehicle approaches the left side in FIG. The supporting table 2 'requires to move closer to the fixed rotation fulcrum C', while the driving forces of the two interfere with each other. It takes time, as shown in Fig.
The wheels (10A, 10B, 10C, 10D) of the part containing the error are deflected, and the measurement reference line Ls and the vehicle center line Lc do not match,
Also, the center line of the body where the headlight is mounted and the vehicle center line Lc are displaced.

When these deviations occur, the wheels (10A, 10B, 10A, 10B,
10C, 10D) and the measurement reference line L
The measured values such as the light distribution measurement of the headlight and the taillight, which are measured on the premise that s and the vehicle center line Lc match, become inaccurate, making it impossible to perform the test with high accuracy.

In view of the drawbacks of the related art, the present invention connects the pair of support bases to a link-shaped connecting mechanism having a center rotation fulcrum that is configured to be able to move left and right, and in each of the left and right wheels on the front wheel side and the rear wheel side. While allowing the vehicle center line Lc to deflect with respect to the measurement reference line Ls due to the mounting position error, the distance error between the left and right wheel bases, and the like, the deflection is caused by the movement amount of the center rotation fulcrum. Or measure the amount of deviation,
It is an object of the present invention to provide a vehicle test apparatus capable of obtaining accurate test data by feeding back the measured amount to the test data or the test procedure.

"Means for solving the problem" The present invention provides a pair of support bases 2 and 2 'provided on the front wheel side and the rear wheel side, respectively, in order to achieve such a technical problem.
A floating fulcrum (central rotation) that can be moved only in the orthogonal direction without using a fixed fulcrum C ′ provided on the measurement reference line Ls as a center rotation fulcrum of the link-shaped coupling mechanism 5 that moves the symmetrical space therebetween. The first feature is a point defined as a fulcrum C. The amount of movement of the floating fulcrum C that deviates following the approaching / separating operation of the pair of support bases 2 and 2 ′ from the measurement reference line Ls immediately or The second feature is that the indirect measurement is possible.

Here, indirectly detecting the moving amount of the floating fulcrum C means
For example, it refers to a case where the amount of displacement of each of the support bases 2 and 2 ′ that are symmetrically moved toward and away from each other based on the floating fulcrum C is measured, and the movement amount of the floating fulcrum C is detected based on a difference between the measured values. .

Further, the support base is provided with a pair of juxtaposed rollers that extend along the direction of movement of the support base and that mount and rotate the wheels, and the wheels rotate on the juxtaposed rollers to perform a test. The third feature is that it is configured to be performed.

[Operation] According to the technical means, the first left and right wheels on the front wheel side and the rear wheel side rotate and contact with and separate from the support shaft 21 while rotating.
And wheels (10A, 10A,
10B, 10C, 10D) while holding both sides of the wheel (10A, 10C).
B, 10C, 10D), the wheel (10A, 10B, 1
0C, 10D) corresponding to the mounting position, the clamping means 3
While swinging around the center 21, the support bases 2, 2 'move toward and away along the rail corresponding to the tread width of the left and right wheels on the front wheel side and the rear wheel side.

At this time, since the pair of support bases 2 and 2 ′ are connected to the connecting mechanism 5 about the floating fulcrum C, they come and go symmetrically about the floating fulcrum C. Since the floating fulcrum C is configured to be movable in the orthogonal direction, the mounting position error between the left and right wheels on the front wheels 10A, 10B side and the rear wheels 10C, 10D side, and the distance between the left and right wheel bases. If there is an error or the like, the floating fulcrum C moves in the orthogonal direction based on the vector value in the orthogonal direction corresponding to the difference between the vehicle center line Lc including the error and the measurement reference line Ls.

Therefore, according to such technical means, since the center of the coupling mechanism 5 for moving the pair of support bases 2 and 2 ′ symmetrically to and away from each other is movable in the orthogonal direction, the wheel (10A, 10A, 10B, 10C, 10D), the center positions of the pair of support bases 2, 2 ', in other words, the tread center positions of the front wheel side and the rear wheel side are equal to the difference. Because of the deviation, the center line connecting the front wheel-side floating fulcrum C corresponding to the tread center position and the rear wheel-side floating fulcrum C 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 equation. The deflection angle can be obtained by dividing the distance between the tread centers, and based on the deflection angle, the facing angle of the measuring device for measuring the light distribution of the headlight and the taillight can be corrected. By feeding back the deflection or deviation amount to the test data or test procedure, such as compensating the toe value or other data measured based on the above, it is possible to obtain accurate test data.

α = αf + αr 1) ω = TL / α 2) Front-wheel-side floating fulcrum deviation: αf Rear-wheel-side floating fulcrum deviation: αr Vehicle centerline deviation from measurement reference line: α The distance between tread centers: TL The deflection angle: ω In the present invention, since the test is performed while the wheel is rotating, the unevenness of the wheel surface is measured in a state where the unevenness of the wheel surface is averaged by the guide member in contact with the wheel surface. Tested more accurately than measured in condition.

Hereinafter, preferred embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just

FIG. 1 is an enlarged perspective view of a main part of a composite test apparatus for an automobile according to an embodiment of the present invention, and FIG. 2 is a schematic plan view thereof.

This embodiment has a rear wheel measuring unit A and a front wheel measuring unit B that can arbitrarily change the center-to-center distance corresponding to the distance corresponding to the distance between the wheel bases of the automobile. ,
B is a pair of rails 11, 11 laid on the base 1,
A pair of support bases 2, 2 'arranged on the rails on both sides of the measurement reference line Ls, a vertical support shaft 21 rotatably supported on the support bases 2, 2', Roller 3 fixed on the vertical support shaft 21 and holding both sides of the wheels (10A, 10B, 10C, 10D)
1, 32, 33 (FIG. 1) are configured so as to be capable of coming and going around the support shaft 21, and the pair of support bases 2, 2 '.
A moving connection mechanism 5 called an “equalizer” that connects the space symmetrically with respect to the floating fulcrum C so as to be able to move toward and away from the center, a linear gauge 6 that detects the amount of movement of the floating fulcrum C, and wheels (10A, 10B, 10C, 10D) and a pair of juxtaposed rollers 7A, 7B mounted above the support bases 2, 2 '.

On the support bases 2, 2 ', a support shaft 21 is provided substantially at the center thereof.
Are rotatably supported vertically, a rotation displacement detecting means 22 comprising a perforated disk 22a and a photo interrupter 22b at the lower end of the support shaft 21, and a turntable 24 having a guide rail 23 at an intermediate position. And a rotating rod 16a rotatable in the horizontal direction is fixedly mounted or pivotally supported on the upper end thereof.

Next, the structure of the clamp means 3 including these members will be described in detail. The L-shaped support arms 25, 25 are slidably mounted on the turntable 24 along the guide rails 23.
Are arranged so as to protrude upward from below the space 30 sandwiched between the juxtaposed rollers 7A and 7B.

The support arm 25 is formed such that the abdomen sandwiched between the juxtaposed rollers 7A and 7B has a reduced width, and is formed so as to be able to swing in the space 30 and both ends of the rotating rod 16a fixed to the support shaft 21 and the support arm. The bottom of the support arm 25 is pivotally supported by swing rods 16b and 16c, and the support arm is formed by a link-shaped connecting member 16 composed of the rod group.
The arm 25 is configured to be able to contact and separate along the guide rail 23, and the support arms 25, 25 are configured to be able to swing in the horizontal direction by the air cylinder 13 connected to the turntable.
Note that the support shaft 21 is configured to be able to be positioned at a center position between the pair of rails 11 and 11, and that the front wheels 10A and 10B and the rear wheel 10
The distance between the centers of the rails 11 provided on the C and 10D sides is set to be equal to the distance between the wheel bases of the vehicle.

An upper plate 15 is fixed to the upper end of the support arm 25 in parallel with the guide rail 23, and wheels (10A, 10B, 10C,
10D) Install roller members 31, 32, and 33 so as to face the side wall surface. The first and second roller members 31, 32 are symmetrically arranged along a direction orthogonal to the guide rail 23 and are arranged at a predetermined angle in the circumferential direction of the wheel 10A,
The third roller member 33 extends vertically upward, and the wheels (10A, 10B, 10C, 10C) are moved by an air cylinder (not shown).
D) To be able to fall down in the direction away from the side wall surface.

On the other hand, a connecting mechanism 5 for connecting the pair of support bases 2 and 2 'so as to be able to approach and separate symmetrically in a bilateral manner is a rotary rod having a rotary fulcrum C on a movable base 51 substantially positioned on a measurement reference line Ls.
52, and rod-shaped rods 53 and 54 rotatably supporting between both ends thereof and the support bases 2 and 2 '. The movable base 51 is substantially measured on a rail 55 extending in the orthogonal direction. By arranging it at a position coinciding with the line Ls, the center rotation fulcrum of the connecting mechanism 5 can function as a floating fulcrum C that can move only in the orthogonal direction.

A linear gauge 6 fixed on the base 1 is attached to the side wall surface of the moving table 51, and the linear gauge 6 is used to move the measurement reference line Ls in the orthogonal direction through the moving table 51.
Of the floating fulcrum C can be measured.

The juxtaposed rollers 7A and 7B are disposed in parallel with the rail, are rotatably supported by a frame or the like via a roller shaft, and have a rotation speed detector and a motor (not shown) on each of the rollers 7A and 7B. And a braking force detector are connected to each other so that a brake and a speed test can be respectively performed.

According to this embodiment, after the brakes and the speed test are performed using the juxtaposed rollers 7A and 7B, the turntable 24 is rotated by the air cylinder 13 while the wheels are rotated.
The support arm 25 along the guide rail 23 along the wheel side wall
When approaching 10a, the support arm 25 on the other side also approaches the wheel side wall surface 10b on the other side via the communication member 16, and the pair of roller members 31, 31 contact the wheel side wall surface 10a, and then are connected. Since the member 16 is formed of a link member, the other roller members 32, 32
Swings in a horizontal direction with respect to the wheel side wall surface, and follows this, a rotating shaft fixedly mounted on the turntable 24 via the support arm 25.
The rotation of the support member 3, in other words, the wheel (10), is detected by the rotation displacement detecting means 22 attached to the lower end of the support member 3.
A, 10B, 10C, 10D) can measure the degree of incline called toe, and by configuring the vertically upright roller member 33 so as to be able to swing up and down, the wheels (10A, 10B, 10C, Ten
The vertical inclination of D) can also be measured.

When the wheels (10A, 10B, 10C, 10D) are sandwiched between the first and second roller members 31, 32, the pair of supports 2, 2 'are centered on the floating fulcrum C at this time. Since the floating fulcrum C is deviated based on the difference between the vehicle center line including the mounting position error and the like on each of the left and right wheels and the measurement reference line, the floating fulcrum C is connected to the support base 2, 2 'is moved in the orthogonal direction along the rail 11 in a symmetrical direction in which it is separated from and in contact with each other, and the amount of deviation at the time of completion of the movement is measured based on the linear gauge 6, whereby the above-described operation of the present invention is smoothly achieved. I can do it.

[Effects of the Invention] As described above, according to the present invention, in a state in which the wheels are rotated, the mounting position error on each of the left and right wheels on the front wheel side and the rear wheel side, and the distance error between the left and right wheel bases, etc. The deflection amount can be measured while allowing the included vehicle center line to deflect with respect to the measurement reference line.

By feeding back to the test data or the test procedure, highly accurate test data can be obtained.

Further, since the test is performed in a state where the wheel is rotating, the test is performed in a state where the unevenness of the wheel surface is averaged by the guide member abutting on the wheel surface, and the test is more accurately performed than when the wheel is stationary.

And so on.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a composite test apparatus for an automobile according to an embodiment of the present invention, and FIG. 2 is a schematic plan view thereof. FIG. 3 is a schematic plan view showing a composite test apparatus for an automobile according to the prior art. 2: support base, 5: coupling mechanism, 31: roller (first guide member), 32: roller (second guide member), C: floating fulcrum (center rotation fulcrum), Ls: measurement reference line

Claims (1)

(57) [Claims] 1. A vehicle test apparatus in which one or a plurality of test items can be tested by placing a vehicle at a predetermined position, wherein the vehicle test apparatus has a measurement reference line along a vehicle traveling direction. A support base movable in a direction orthogonal to the measurement reference line extending in the direction (hereinafter referred to as an orthogonal direction) is provided, and is disposed on one side and the other side of the wheel of the automobile, facing each other; A guide member is configured by a first guide member and a second guide member movable between a position where the wheel comes into contact with the wheel and a position away from the wheel, and the guide member is arranged on the support base, A pair of the support bases are arranged on the front and rear wheels corresponding to the left and right wheels, and the pair of support bases corresponding to the left and right wheels are configured to be able to approach and separate from each other along the orthogonal direction, and are movable in the orthogonal direction. A link-like connecting mechanism having a center rotation fulcrum provided on the base, connecting the pair of support bases by the connecting mechanism, and following the movement of the pair of support bases toward and away from each other, the measurement reference A movement amount of the center rotation fulcrum deviated from a line is configured to be directly or indirectly measurable; and the support base is extended along a movement direction of the support base, and the wheel is mounted thereon. A pair of juxtaposed rollers to be rotated by rotating the wheels, and the wheels are configured to be rotated and tested on the juxtaposed rollers.