JP2773595B2 - Wheel angle measurement gauge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel angle measuring gauge capable of individually measuring the toe angles of left and right wheels of a vehicle.

[0002]

2. Description of the Related Art As a conventional toe-in measuring gauge for measuring a toe angle on the front wheel side of a vehicle, the one shown in FIG. 9 has been proposed. In this conventional example, a telescopic bar 1 whose length can be adjusted in accordance with the distance between the left and right wheels on the front wheel side of a vehicle, and a pair of support jigs 2a attached to both end sides of the telescopic bar 1 so as to be axially adjustable. , 2b and these support shafts 2a, 2b
A pair of toe-in measuring needles 3a and 3b similarly mounted on the outside or inside of the tongue so as to be position-adjustable, and a pair of labels printed with scales attached to the mounting positions of the toe-in measuring hands 3a and 3b (FIG. (Not shown) and FIG.
As shown in the figure, the front-end side and the rear end side of the tires on the front left and right wheels are measured the distances A and B between the center portions in the width direction, respectively.
The difference value (BA) between the two wheels is calculated, and this is measured as the total toe-in amount of both wheels.

[0003]

SUMMARY OF THE INVENTION
With the conventional toe-in measurement gauge, the total of both wheels
The toe-in amount can be measured, but the toe-in amount for each wheel
Can not be measured, and as shown in FIG.
The left and right wheels have the same angle of deviation δ_L,δ _RIs raw
The toe-in measurement gauge
-The amount of thrust toe is zero, and the thrust angle
There is an unsolved problem that θ cannot be detected.
You.

Further, in the conventional toe-in measuring gauge, as shown in FIG. 10, it is necessary to measure a width direction distance at each of a front end side and a rear end side of a tire. However, there is an unsolved problem that the rear end needs to be measured below the vehicle, which is very difficult. Therefore, the present invention has been made in view of the unsolved problems of the above conventional example, and an object of the present invention is to provide a wheel angle measuring gauge that can easily and individually measure the toe angle of each wheel. And

[0005]

According to a first aspect of the present invention, there is provided a wheel angle measuring gauge according to the first aspect of the present invention, comprising: A support having an extendable central rod that connects the support, and a wheel angle detection mechanism detachably attached to the left and right rods of the support, respectively, wherein the wheel angle detection mechanism includes:
An angle measuring section detachably mounted on the left and right rod sections and having a level provided thereon, and a wheel mounting section tiltable with respect to the angle measuring section and mounted on the left and right wheels. It is characterized by.

According to a second aspect of the present invention, there is provided a wheel angle measuring gauge having one end detachably mounted on a load wheel of one of front and rear wheels of a vehicle, and a load of the other wheel on the rod. An angle measuring unit provided with a level that is detachably mounted at a position facing the wheel, and a wheel mounting unit that is tiltable with respect to the angle measuring unit and is mounted on a road wheel of the wheel. It is characterized by:

[0007]

In the wheel angle measuring gauge according to the first aspect, the center rod portion of the support is expanded and contracted in a state where the wheel angle detection mechanism is mounted on the left and right rod portions parallel to each other on the support, and the wheel angle is detected. The wheel mounting portions of the mechanism are mounted on, for example, left and right road wheels on the front wheel side, respectively. At this time, since the left and right rod portions are parallel to each other, the wheel mounting portion tilts with respect to the angle measuring portion of the wheel angle detecting mechanism in accordance with the toe angle of each wheel. In this state, for example, the center rod portion of the support is extended, the wheel mounting portion is removed from each wheel, and the wheel angle detection mechanism is removed from the left and right rod portions while maintaining the inclination angle between the angle measuring portion and the wheel mounting portion. By mounting the wheel mounting portion on a horizontal surface plate, the toe angle can be directly read by a level provided in the angle measuring portion.

In the wheel angle measuring gauge according to the present invention, one end of the rod is mounted, for example, outside the road wheel of the rear wheel, and the wheel mounting portion on the other end of the rod is mounted outside the road wheel of the front wheel. By mounting, the wheel mounting portion tilts with respect to the angle measuring portion corresponding to the toe angle of the front wheel. In this state, while maintaining the inclination of the angle measuring unit and the wheel mounting unit, remove the wheel mounting unit from the front wheel road wheel, and remove the angle measuring unit from the rod,
By mounting the wheel mounting part on a horizontal surface plate, the toe angle of the front wheel can be read directly by the level of the angle measuring part.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a plan view and a perspective view showing a first embodiment of the present invention. In the drawing, reference numeral 11 denotes a support, which is formed in a U-shape when viewed from a plane by a central rod portion 12 and left and right rod portions 13L and 13R which are formed by being bent at right angles integrally from both ends thereof and extend rearward in parallel to each other. Is formed. Here, the central rod portion 12 is configured to be axially expandable and contractible by a half portion 12a having one end formed into a cylindrical shape and a half portion 12b fitted inside the half portion 12a. The left and right rods 13
Each of L and 13R has a wedge-shaped wheel stopper 15L which engages the left and right front wheels 14L and 14R on the center rod portion 12 side.
And 15R are integrally formed, and the rear end side is extended rearward in an inverted L-shape, and an elongated hole 16 is formed at the extended end in the front-rear direction.

The wheel angle detection mechanisms 24L and 24R are detachably mounted in the long holes 16 of the left and right rods 13L and 13R, respectively. Wheel angle detection mechanism 24L, 24
As shown in FIG. 3, each of R
a angle measuring unit 26 detachably fixed to the angle measuring unit 26a, and the wheel mounting unit 2 disposed to be tiltable with respect to the angle measuring unit 26.
9.

The angle measuring section 26 is provided with a long hole 22 of the connecting rod 23.
a adjusting plate 27 slidably fixed in the longitudinal direction of the connecting rod 23, and a rectangular parallelepiped block 28 slidably mounted on the adjusting plate 27 in a direction perpendicular to the longitudinal direction of the connecting rod 23. I have. Here, the adjusting plate 27 is formed in a rectangular shape, and a screw shaft 27a that is inserted into the long hole 23a of the connecting rod 23 is vertically provided on one side surface thereof, and a horizontal angle is detected on the left end side. A level 27b is provided, and a pair of guide pins 27c and 27d are vertically provided on the other surface side at a predetermined interval. Numeral 27e is a nut screwed onto the screw shaft 27a. The block body 28 has through holes 28a, 2 through which the guide pins 27c and 27d of the adjustment plate 27 are inserted.
8b is provided, and a level 28c for detecting an angle with respect to a horizontal plane when this surface is directed upward is provided in a concave portion formed on the surface facing the adjustment plate 27, and is provided on the upper and lower surfaces. A central through hole (not shown) is formed therethrough.

The wheel mounting portion 29 is provided with left and right end plates 30a and 30b and upper and lower plates 30c and 30d bridged between the upper and lower surfaces of the end plates 30a and 30b, respectively. Frame 30 formed with
And a support 31 fixed to the right side of the cavity 30e of the frame 30 and one end rotatably supported by the support 31 and the other end extending outward through the right end face plate 30b and extending therefrom. A screw shaft 32 having a knob 32a formed at an end thereof, a rectangular moving nut 33 screwed between the column 31 of the screw shaft 32 and the right end plate 30b, and a rear side of the left end plate 30a and a rear side of the moving nut 33 Engagement pins 34a and 34b which engage with the rims of the road wheels 14a of the respectively suspended wheels.
And a level 35 that can measure the camber angle when the wheel mounting portion 29 disposed on the upper surface corresponding to the support 31 of the upper surface plate 30c is in a vertical state. Then, through holes (not shown) are respectively formed in the center portions of the upper surface plate 30c and the lower surface plate 30d, and the through holes of the block body 28 of the angle measuring unit 26 are aligned with the through holes, for example, the lower hole is formed. The bolt 36 is inserted from the lower surface side of the face plate 30d, and the upper plate 30
By screwing a wing nut 37 onto a male screw protruding from the upper surface of c, a block body 28 constituting the angle measuring unit 26 is tiltably attached to a frame 30 constituting the wheel mounting unit 29. .

Next, the operation of the first embodiment will be described.
First, at least the front left and right wheels 4L and 4R of the vehicle are placed on a surface plate 18 having an upper surface as a horizontal surface, and a steering wheel (not shown) is set to a neutral position in this state. afterwards,
The support 11 is disposed at a position in front of the left and right front wheels 14L and 14R, and the left and right rods 13L and 13R are moved to the front wheels 14L and 1R.
It faces the side of 4R. At this time, the length of the central rod portion 12 is such that the inner distance between the wheel mounting portions 29L and 29R of the wheel angle detecting mechanisms 24L and 24R is equal to the front left and right wheels 14L and 14R.
It is extended beyond the outer interval of R.

Then, first, wheel angle detecting mechanisms 24L and 24R are mounted on the front wheels 14L and 14R, respectively. This mounting is performed by rotating the screw shaft 32 so that the interval between the engaging pins 34a and 34b of the wheel mounting portion 29 is rotated.
R is set and placed in a state smaller than the inner diameter of the rim of the road wheel 14a, and the wing nut 37 is loosened to release the frame-shaped body 3
0 and the block body 28 are placed so as to be tiltable, and in this state, the engaging pin 34a is brought into contact with a center position in the height direction on the front side of the inner peripheral surface of the rim of the load wheel 14a. The horizontal direction is maintained by a level 27b disposed on the rim 27, and the engaging pin 34b is moved outward by rotating the screw shaft 32 in this state, so that the engaging pin 34b is moved into the rim 14b of the load wheel 14a. The wheel mounting portion 29 is engaged with the peripheral
a.

Then, while adjusting the length of the central rod portion 12 of the support 11, the wheel stoppers 15L and 15R
L and 14R from the front and the left and right
The screw shaft 27a formed on the adjustment plate 27 of the angle measuring unit 26 in the wheel angle detection mechanisms 24L and 24R is inserted into the long holes 16 of L and 13R, and the nut 27e is screwed from the opposite side. For this reason, the central rod portion 12 of the support 11 is in the left-right direction, and accordingly, the left and right rod portions 13L and 13R
Extend in the front-rear direction, and the adjusting plate 27 is closely attached to the adjusting plate 27. Since the adjusting plate 27 and the block body 28 are connected by guide pins 27c and 27d and through holes 28a and 28b so as to be able to move in parallel. , The block body 28 is the left and right rod portion 1
3L and 13R are parallel to each other in the vehicle width direction with the front wheels in contact with each other, and the inclination angle between the block body 28 and the frame 30 of the wheel mounting portion 29 represents the toe angles θ _L and θ _R of the front wheels 14L and 14R. become.

In this state, the frame body 30 and the block body 28 are fixed integrally by tightening the wing nut 37, and then the nut 27e is loosened and removed from the screw shaft 27a. Parts 13L and 13R
And the wheel angle detecting mechanisms 24L and 24R are separated, and then the adjusting plate 27 is extracted from the block body 28. Then, the screw shaft 32 of the wheel mounting portion 29 is rotated to move the engaging pin 34b inward, thereby Attach the mounting portion 29 to the front wheels 14L and 14L.
Remove from R.

Therefore, the removed wheel angle detecting mechanisms 24L and 24R are rotated inward by 90 degrees, respectively, so that the front ends of the front and rear rod portions 11F and 11R of the wheel mounting portions 9L and 9R are fixed as shown in FIG. By contacting the upper surface of the board 18 and standing upright, the level of the inclination angle of the angle measuring units 8L and 8R, that is, the individual toe angles θ _L and θ _R of the front left and right wheels 4L and 4R can be read directly by the level 10. .

Further, according to the second embodiment, since the level 30 capable of directly reading the camber angle is provided on the frame 30 of the wheel mounting section 29, the wheel mounting section 29 is mounted on the front wheel 20FR, for example. The camber angle can be read directly by the level 35 by attaching the engagement pins 34a and 34b to the rim with the longitudinal direction of the frame 30 being vertical to the wheel 14a.

Further, the caster angle θ _CS is measured as follows by measuring the camber angles θ _{CA (+10)} and θ _{CA (−10)} at a tire turning angle of ± 10 °, for example. Can be. That is, the caster angle θ _CA is calculated from the change in the camber angle in the range of the tire turning angle of ± 10 °.
Can be calculated by the following equation (1).

Θ _CA = K (θ _{CA (+10)} −θ _{CA (−10)} ) / (δ _{+ 10−} δ− ₁₀ ) (1) where K is a coefficient. Therefore, the caster angle θ _CS at ± 10 ° can be expressed by θ _CS = K ^* · (θ _{CA (+10)} −θ _{CA (-10)} ) (2), where K ^* is It is a coefficient.

For this reason, the camber angles θ _{CA (+10)} and θ _CA measured at a tire turning angle of ± 10 ° in the above equation (2).
By substituting _{CA (−10)} , the caster angle θ _CA can be calculated. At this time, as shown in FIG. 5, a triangular support piece 40 having a through hole at the tip is fixed to a side surface of the level 35 for measuring the camber angle.
By screwing the screw 41 to the upper surface plate 30c of the frame 30 through the through hole formed in the
It is supported so as to be tiltable with respect to 0. For example, when the steering wheel is turned to + 10 °, the level 35 is set to zero.
By reading the angle at which the steering wheel is turned to 10 °, the amount of change between the two (θ _{CA (+10)} −θ _{CA (−10)} ) can be directly calculated.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a toe angle can be measured by mounting a measuring gauge between the front and rear wheels instead of mounting the measuring gauge between the left and right wheels as in the first embodiment. It is. That is, as shown in FIG. 6, the wheel angle measuring gauge of the second embodiment includes a connecting rod 23 having one end fixed to a hub bolt 21 of a rear wheel 20RR via a fixing adapter 22, and a connecting rod 23 of the connecting rod 23. It comprises a wheel angle detection mechanism 24 having exactly the same configuration as the above-described wheel angle detection mechanisms 24L and 24R detachably mounted on the other end side.

As shown in FIG. 7, the fixing adapter 22 has a large-diameter portion 22a and a small-diameter portion 22 connected to the large-diameter portion 22a.
b and a female screw 22c screwed into the hub bolt 21 of the rear wheel 20RR on the end face of the large diameter portion 22a.
And the same external thread 22d as the hub bolt 21 is formed on the outer peripheral surface of the small diameter portion 22b. A long hole 23a extending in the longitudinal direction is provided at both ends of the connecting rod 23.
23b is formed, a small-diameter portion 22b of the fixing adapter 22 is inserted into the elongated hole 23b, and a nut 25 removed from the hub bolt 21 from the opposite side is inserted into the male screw 22d.
Is screwed into the fixing adapter 22, the screw hole 27a formed on the adjustment plate 27 of the wheel angle detection mechanism 24 is inserted into the long hole 22a, and the nut 27e is tightened from the outside thereof. , The wheel angle detection mechanism 24 is fixed.

Next, the operation of the second embodiment will be described.
First, the vehicle is placed on a horizontal surface plate, and in this state, the wheel angle detection mechanism 24 is first mounted on the front wheels 20FR in the same manner as in the first embodiment. On the other hand, the nut 25 is removed from the hub bolt 21 of the rear wheel 20RR, and the hub bolt 21 is removed.
The female thread 22c of the fixing adapter 22 is screwed to the tip of the rear wheel 20RR.
The connecting rod 23 is fixed vertically by inserting the long hole 23b of the connecting rod 23 into the small diameter portion 22b of the fixing adapter 22 and screwing the nut 25 into the male screw 22d from outside. Temporarily fixed to the wheel 20RR, a screw shaft 27a formed on the adjustment plate 27 of the angle measuring unit 26 is inserted into the long hole 23a of the connecting rod 23, and the nut 2 is inserted from the opposite side.
7e is screwed. Then, the nut 2 on the rear wheel 20RR side
5, the connecting rod 23 is arranged parallel to the front-rear direction of the vehicle, and the nut 27e is fully tightened on the front wheel side. Therefore, the connecting rod 23 is parallel to the rear wheel 20RR, and the adjusting plate 27 is in close contact with the connecting rod 23.
Reference numeral 8 denotes guide pins 27c and 27d and through holes 28a and 28b.
The block 28
Is parallel to the connecting rod 23, and the inclination angle between the block body 28 and the frame body 30 of the wheel mounting portion 29 represents the toe angle of the front wheel 20FR.

In this state, after the wing nut 37 is tightened, the wheel angle detecting mechanism 24 is removed from the front wheel 20FR, and the removed wheel angle detecting mechanism 24 is placed on a horizontal surface plate as in the first embodiment. The tip of the engagement pins 34a, 34b of the wheel mounting portion 29 is brought into contact with the surface plate, and the block 28 of the angle measuring portion 26 is placed on the upper surface side, so that a level provided on the block 28 is provided. With 28c, the toe angle of the front wheel 20FR can be read directly.

For the toe angle measurement, the connecting rod 23 is fixed to the front wheel 20FR and the rear wheel 20RR
Even if the wheel angle detection mechanism 24 is mounted on the vehicle, if the parallel relationship between the longitudinal direction of the connecting rod 23 and the front-rear direction of the vehicle can be maintained, the toe angle of the front wheel 20FR can be measured in the same manner as described above. Next, a third embodiment of the present invention will be described with reference to FIG.

The third embodiment differs from the second embodiment in that the block 28 is omitted, and the adjusting plate 27 is extended rearward instead of the guide pins 34a and 34b and extended toward the distal end. A support piece 51 having a hole 51a formed therein is integrally formed. Further, a level 52 for measuring a toe angle is provided on the adjustment plate 27, and a long hole 51a of the adjustment plate 27 is formed on the upper surface plate 30c of the frame 30. Except that the adjusting plate 27 is tiltably and slidably connected to the frame 30 by screwing the wing nut 54 to the bolt 53 in a state of being inserted through the vertically provided bolt 53. It has the same configuration as that of the second embodiment, and the parts corresponding to those in FIG. 6 are denoted by the same reference numerals, and the detailed description thereof is omitted.

According to the third embodiment, the wheel mounting portion 29
Is mounted on the road wheel 14a of the front wheel 20FR, and one end of the connecting rod 23 is connected to the rear wheel 2 via the fixed adapter 22.
0RR, the longitudinal direction of the connecting rod 23 is made parallel to the front-rear direction of the vehicle, and the other end is loosened with a wing nut 53 so as to be tiltable and slidable with respect to the frame 30.
Is fixed, the angle formed between the adjustment plate 27 and the frame 30 corresponds to the toe angle of the front wheel 20FR. In this state, the wing nut 53 is tightened to adjust the adjustment plate 27 and the frame 3.
After fixing the inclination angle to 0, the wheel angle detecting mechanism 24 is removed from the road wheel 14a, and the engaging pins 34a and 34b of the wheel mounting portion 29 are brought into contact with a horizontal surface plate to erect the entire wheel angle detecting mechanism 24 upright. The adjustment plate 2
The toe angle can be read directly by the level 52 provided at 7.

The third embodiment can be applied not only to the second embodiment but also to the first embodiment. In the second and third embodiments, the case where the connecting rod 23 is fixed to one hub bolt 21 on the rear wheel 20RR side via the fixing adapter 22 has been described. At the end on the 23b side, a rod portion extending vertically and having a long hole is integrally formed to form a T-shape as a whole.
By individually fixing the hub bolts 21 via the fixing adapters 22, the longitudinal direction of the connecting rod 23 can be stably held in a direction parallel to the rear wheel.

In the first to third embodiments,
Wheel angle detection mechanisms 24L, 24R and 2 at the time of toe angle measurement
Although the case where the level 27c for detecting the horizontal angle of 4 is provided on the adjustment plate 27 has been described, the present invention is not limited to this, and the level 27c may be directly provided on the upper surface plate 30c of the frame 30 of the wheel mounting portion 29. . In this case, it is necessary to secure a horizontal surface in consideration of the screw shaft 27a at each toe measurement.

Further, in the first to third embodiments, the case where the engagement pin 34b of the wheel mounting portion 29 is moved by the feed screw mechanism and fitted to the inner peripheral surface of the rim of the road wheel 14a has been described. However, the present invention is not limited thereto, and an arbitrary moving mechanism can be applied.
a, 34b may simply be engaged with the inner peripheral surface or the edge of the rim. In short, the road wheel 14a of the front wheel and the frame 3
It suffices if 0 and 0 can maintain a parallel relationship.

[0032]

As described above, according to the wheel angle measuring gage according to the first aspect, the left and right parallel rod portions facing the outside of the left and right wheels of the vehicle and the expansion and contraction connecting the left and right rod portions. A support having a central rod portion, and a toe angle detection mechanism detachably attached to the left and right rod portions of the support member, wherein the toe angle detection mechanism is detachably attached to the left and right rod portions. Since the angle measuring unit is mounted and provided with a level, and the wheel mounting unit is tiltable with respect to the angle measuring unit and is mounted on the left and right wheels, the toe angle is formed on the left and right rod portions of the support. By mounting the wheel mounting portion of the toe angle detection mechanism to the wheel with the detection mechanism mounted, a tilt angle corresponding to the toe angle of the front wheel is generated between the wheel mounting portion and the angle measuring portion, and this toe angle Remove the detection mechanism from the front wheel and set the wheel mounting part on a level surface plate. The toe angle can be read directly with the level of the angle measurement unit, and the toe angles of the left and right wheels can be measured individually, and there is no need to go under the vehicle body. The effect is obtained that the measurement can be easily and reliably performed, and the measurement time can be greatly reduced.

According to the second aspect of the present invention, a rod having one end detachably mounted on a road wheel of one of the front and rear wheels of the vehicle and the other wheel of the rod are provided. An angle measuring unit detachably mounted at a position facing the road wheel and having a level provided thereon, and a wheel mounting unit that is tiltable with respect to the angle measuring unit and mounted on the road wheel of the wheel. With the configuration provided, the one end of the connecting rod is fixed to, for example, the rear wheel, the wheel mounting unit and the angle measuring unit are mounted on the front wheel, and the angle measuring unit is mounted on the other end of the connecting rod. Since the inclination angle between the mounting portion and the angle measuring portion corresponds to the toe angle of the front wheel, the toe angle of the front wheel with respect to the rear wheel can be measured, and the same effect as in claim 1 can be obtained. .

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the first embodiment.

FIG. 3 is a sectional view showing a wheel angle detection mechanism.

FIG. 4 is an explanatory diagram showing a toe angle measurement state of the first embodiment.

FIG. 5 is a side view showing an example of a camber angle measuring level.

FIG. 6 is a perspective view showing a second embodiment of the present invention.

FIG. 7 is a plan view showing a fixing adapter.

FIG. 8 is a perspective view showing a third embodiment of the present invention.

FIG. 9 is a plan view showing a conventional example.

FIG. 10 is an explanatory diagram showing a toe-in amount measurement state in a conventional example.

FIG. 11 is a view showing a state of measuring a toe-in amount when a vehicle body thrust angle occurs in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Support body 12 Central rod part 13L, 13R Left and right rod parts 14L, 14R Left and right front wheels 20FR Front wheel 20RR Rear wheel 21 Hub bolt 22 Fixing adapter 23 Connecting rod 24 Wheel angle detecting mechanism 26 Angle measuring unit 27 Adjustment plate 27c Level measuring level 28 Block body 28c Toe angle measuring level 29 Wheel mounting part 30 Frame 35 35 Camber angle measuring level 52 Level

Claims (2)

(57) [Claims] 1. A support having left and right parallel rods facing each other outside the left and right wheels of a vehicle and an extendable central rod connecting the left and right rods, and a left and right rod of the support. A wheel angle detection mechanism, each of which is detachably mounted, wherein the wheel angle detection mechanism is detachably mounted on the left and right rod portions and an angle measurement unit provided with a level, and the angle measurement unit And a wheel mounting portion mounted on the left and right wheels. 2. A rod having one end detachably mounted on a road wheel of one of the front and rear wheels of the vehicle, and a level detachably mounted on a position of the rod opposed to the other wheel road wheel. A wheel angle measuring gauge, comprising: an angle measuring unit provided with a vessel; and a wheel mounting unit that is tiltable with respect to the angle measuring unit and is mounted on a road wheel of the wheel.