JP4126207B2 - Automotive toe-in and camber angle measuring device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an apparatus for measuring toe-in (tire opening angle in the horizontal direction) and camber (tire opening angle in the vertical direction).
[0002]
[Prior art]
So far, a device for measuring the angle of toe-in and a device for measuring the angle of kimber have been proposed separately.
[0003]
As a conventional toe-in measuring device, an automobile is placed on a flat ground, and the stays are fixed so as to be sandwiched between the peripheral edges of the wheels attached to the front tires, and the left and right tire surfaces are in contact with both stays. Some of them are designed so that the inclination of the toe-in can be found by reading the scale indicated by the position of the rubber string in contact with the scale of the protractor provided on the stay.
[0004]
Also, fix the stay so that it is sandwiched between the periphery of the wheels attached to both tires of the front wheel, look into the mirror provided on the other side from the reference point of one stay, and the position of the reference point reflected in the mirror is Some of them measure the distance shown to show the tilt of the toe-in.
[0005]
None of these measuring devices can measure unless the automobile is placed on a flat ground, and since a device such as a stylus is attached to the periphery of the wheel, it is affected by the deformation of the wheel itself, so it is highly accurate. Accurate measurement was not possible.
In addition, the measurement work was very troublesome because it was necessary to find a flat ground and install the devices on both the left and right tires.
In addition, the device is very bulky and difficult to carry or find a storage location.
[0006]
In addition, the conventional camber measuring device is a large-scale installation type that measures the camber by the difference between the opening and closing of the upper and lower sides of the measuring arm by placing the angle measuring arm on the top and bottom of the tire with respect to the horizontal ground as a reference. Although the device is used, it cannot be used on a gravel road or deformed ground, and the device is expensive and very bulky.
[0007]
All of these devices are dedicated measuring devices for toe-in or camber, and there has been no device that can measure both.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and it is possible to measure the toe-in and camber angles of an automobile tire, and to easily and accurately measure the inclination angles at any place. It is an object of the present invention to provide a device that can
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the toe-in and cavern angle measuring apparatus of the present invention includes:
A plurality of upright fixed leg shafts for screwing into bolts or bolt holes for fixing a tire in a hub portion for fixing a tire of an automobile, a flat base plate fixed to the upright fixed leg shaft, and this plane An angle ruler shorter than the diameter of the tire pivotally fixed to the base, a plurality of set screws for fixing the rising fixed leg shaft and the flat base, and a wheel attached with the angle ruler The front or rear wheel fixing bolt for fixing the tire on the bolt or bolt hole, the downward swing for reading the scale on the angle ruler, and the angle ruler on the angle ruler and the threading correction shaft. It consists of tension yarns longer than the distance between the tires before and after reading the scale.
[0010]
The flat base plate is provided with a plurality of set screw insertion holes corresponding to the locations of the bolts or bolt holes for fixing the tires in the hub portion for fixing the tire of the automobile, and at an angle to the center of the set screw insertion holes. A ruler fixing hole for pivotally attaching the ruler is provided.
[0011]
The angle ruler has a flat surface in close contact with the flat base plate at the center and a screw plate insertion hole in the flat surface, and the plate surface stands upright with respect to the rotary plate portion and the plate surface It comprises a measuring plate portion provided with a yarn hooking portion at at least one place of both or one end edge and having an angular scale in the width direction at the other end edge with the yarn hooking portion as a base point.
[0012]
The rising and fixing leg shaft has a female screw or a male screw that is screwed into a bolt or a bolt hole for fixing a tire on one end side, and a female screw that is screwed on the set screw on the other end side. .
[0013]
The yarn hooking correction shaft has a bolt for fixing the tire on one end side or a female screw or a male screw to be screwed into the bolt hole, and has a height equal to the rising height of the yarn hooking portion of the angle ruler on the other end side. One reference groove line is provided at this position, and a plurality of correction scale groove lines indicating the distance to the reference groove line are provided.
[0014]
The downward swing has a hooking means for the yarn hooking portion at one end and a weight or a weight and a yarn hooking portion at the other end.
[0015]
The tension yarn has a hooking means for the angle ruler thread hanging portion and / or the swinging yarn hanging portion at least at one end portion, and the other end portion has a ring hung on the groove line of the yarn hooking correction shaft and / or Alternatively, the angle ruler has a hooking means for hooking it onto the yarn hooking portion.
[0016]
Moreover, in the said structure, the scale hole of the width direction is penetrated and provided in the center of the said angle ruler.
[0017]
Furthermore, in the above-described configuration, the set screw insertion holes of the flat base plate are formed at two or more locations on different equal degrees with the ruler fixing hole as a center.
[0018]
Furthermore, in the above-described configuration, the yarn hooking correction shaft is provided with female screws of different diameters corresponding to different tire fixing bolts at both ends, and one reference groove line and its reference groove line closer to both ends. And a plurality of correction graduation groove lines indicating the distance to.
[0019]
Further, in the above-described configuration, the rising and fixing leg shaft is provided with female screws of different diameters corresponding to different bolts for fixing tires at both ends, and female screws for screwing a set screw into the bottom of the female screw are provided. It is made up of.
[0020]
Further, in the above configuration, the tension yarn includes tension holding means using rubber, a spring, or a weight.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
An automotive tire toe-in and camber angle measuring device according to the present invention will be described below based on examples of the drawings showing the embodiments thereof.
[0022]
As shown in FIGS. 1 and 2, the toe-in and cavern angle measuring apparatus of the present invention is screwed into a tire fixing bolt 23 or a bolt hole (not shown) in a hub portion H for fixing a tire T of an automobile. A plurality of rising fixed leg shafts 3 having the same length, a flat table 1 fixed to the rising fixed leg shaft 3, an angle ruler 2 pivotally fixed to the flat table 1, and the rising fixed A plurality of set screws 4 for fixing the leg shaft 3 and the flat base plate 1; a threading correction shaft 19 for fixing the bolt 23 for fixing the tire; and a downward swing 6 for reading the scale on the angle ruler 2; The tension ruler 2 and the tension yarn 7 longer than the distance between the tires before and after reading the scale of the angle ruler 2 on the yarn hooking correction shaft 19.
[0023]
The hub portion H of the automobile tire T has a type having a bolt fixing hole (not shown) separately from the type in which the bolt 23 for fixing the tire is protruded. In the case of a type having a bolt fixing hole, One having a male screw (not shown) that can be screwed and connected to the female screw of the bolt fixing hole at the base end of the rising fixed leg shaft 3 is prepared.
Further, as shown in FIG. 3, it is desirable to attach a different diameter identification mark 22 to the rising fixed leg shaft 3 so that the mounting side is not mistaken at the time of mounting.
Further, similarly, it is desirable to attach a different diameter identification mark 22 to the yarn hooking correction shaft 19 so that the attachment side size is not mistaken at the time of attachment.
[0024]
The flat platform 1 is provided with a plurality of set screw insertion holes 10 corresponding to the locations of the bolts 23 or bolt holes (not shown) for fixing the tires in the hub portion H for fixing the tires T of the automobile. A ruler fixing hole 8 for pivotally attaching the angle ruler 2 is provided at the center of the set screw insertion hole 10.
[0025]
The angle ruler 2 has a rotating plate portion 2b having a flat surface in close contact with the flat table 1 at the center and provided with screw insertion holes 9 on the flat surface, and an L-shaped plate surface with respect to the rotating plate portion 2b. Bends are formed at right angles (shown in FIG. 3), and a thread hooking portion 12 is provided in at least one place on both or one edge of the plate surface (FIG. 3 shows a mode in which the thread hooking grooves 12 are provided in both). In addition, angle scales 13 and 25 in the width direction are shown on the other side edge with the thread hook 12 as a base point (in FIG. 7, numerical angle values are shown, and the camber measurement scale 25 and the toe-in measurement scale 13 are written. ) Provided with the measurement plate portion 2a.
The camber measurement scale 25 and the toe-in measurement scale 13 may be written on both or either one of the front and back sides of the measurement plate portion 2a (FIG. 3 shows an aspect written on the outside of the L-shaped bend and FIG. 1 shows the inside). .
[0026]
The pivot bolt 5 fixes the angle ruler 2 and the flat table 1, and can be inserted into the screw insertion hole 9 of the angle ruler 2 and screwed into the ruler fixing hole 8 of the flat table 1. Like that.
[0027]
In order to avoid the angle ruler 2 from hitting the tire T and the plane platen 1 so as to prevent the angle ruler 2 from hitting the tire T while the platen surface 1 is perpendicular to the hub axis direction. As shown in FIGS. 4 and 6, a female screw 31a or a female screw 31a that is screwed into a tire fixing bolt 23 or a bolt hole (not shown) of the hub portion H on one end side. It has a male screw (not shown) and a female screw 11 to which a set screw 4 for fixing the flat table 1 is screwed on the other end side.
[0028]
The threading correction shaft 19 is provided at one end with a female screw 35a or a male screw (not shown) that is screwed into a bolt 23 or a bolt hole (not shown) for fixing the tire, and on the peripheral side surface near the other end. Is provided with one reference groove line 28 at a height position equal to the rising height of the yarn hooking portion 12 of the angle ruler 2 and a plurality of correction scale groove lines 29 indicating the distance to the reference groove line 28.
[0029]
The swinging swing 6 has a thread hooking means 17 at one end of the thread 16 and a weight 18 or a weight 18 and a thread hook 32 at the other end, and is longer than the ruler 2. Use things.
When the hooking means 17 is hooked on the yarn hooking portion 12 of the angle ruler 2, the downward swing 6 strikes the yarn hook suspended on the camber measurement scale 25 of the angle ruler 2 so that the tilt angle can be read.
When the latching means 17 is used as the latching lump 26a, the latching means 17 has a size enough to be caught without being pulled out from the thread catching groove 12a. For example, a knot or a ball-shaped lead crushed and fixed can be used.
In addition, there is a method of making a retaining ring 26b and hanging the ring on the yarn hooking groove 12a.
[0030]
As shown in FIG. 3, the tension yarn 7 has a hooking means 33 for the yarn hooking portion 12 of the angle ruler 2 and the yarn hooking portion 32 of the downward swing 6 at least at one end portion, and a yarn at the other end portion. A ring 36 that hangs on the groove lines 28 and 29 of the hook correcting shaft 19 and a hooking means 34 to the thread hooking portion 12 or the scale hole 14 of the angle ruler 2 are provided.
The tension yarn 7 is applied to the toe-in measurement scale 13 of the angle ruler 2 and the inclination angle is read and measured.
[0031]
Further, a scale hole 14 provided with a scale 15 in the width direction is provided in the center of the angle ruler 2.
[0032]
Furthermore, the set screw insertion holes 10 of the flat table 1 are formed at two or more locations on different equal degrees with the ruler fixing hole 8 as the center.
By doing so, the flat table 1 (in the figure, a disk shape) can be stabilized and accurately fixed, and the direction of the angle ruler 2 with respect to the hub portion H can be accurately determined.
Note that FIG. 5 shows a state in which the present measurement apparatus is attached while the tire wheel 24 is mounted. This measuring apparatus can be used even with the tire wheel 24 removed.
[0033]
The hub portion H to which the automobile tire T is attached usually has 4 to 6 bolts 23 for fixing the tire protruding at equal angular intervals, but the tire fixing with a female screw (not shown) formed inside. There are also four bolt holes, five, and six bolt holes for equiangular intervals. Corresponding to any of these, it is possible to fix by screwing. As shown in FIG. 1, this method of correspondence is based on the ruler fixing hole 8, and even numbers with respect to the set screw insertion hole 10 are provided with set screw insertion holes 10 a positioned at an angle of 180 degrees. For example, in the case of five, set screw insertion holes 10b at different angular positions of 144 degrees are provided.
[0034]
Further, when the diameter of the hub portion H is different, as shown in FIG. 5, when the diameter is large, even numbers with respect to the set screw insertion hole 10 c are positioned at an angle of 180 degrees. In the case where the number of screw insertion holes 10d is odd, for example five, set screw insertion holes 10e are provided at different angular positions of 144 degrees. Further, when the diameter is small, the even number of the set screw insertion hole 10g is positioned at an angle of 180 degrees with respect to the set screw insertion hole 10f. It is possible to use a set screw insertion hole 10h provided in the above.
[0035]
In this way, the set screw insertion holes 10 corresponding to the tire fixing bolts 23 or bolt hole arrangement portions in the hub portion H are provided at two or more locations on different equalities with the ruler fixing hole 8 as the center. When provided, it is possible to cope with a hub portion H of a different type, such as a four-bolt type or a six-bolt type, in which the tire fixing method is performed with one type of flat platform 1.
[0036]
Further, the yarn hooking correction shaft 19 is provided with female screws 35a and 35b having different diameters corresponding to different tire fixing bolts 23 at both ends, and one reference groove line 28 and its reference groove closer to both ends. A plurality of correction scale groove lines 29 indicating the distance to the line 28 are provided.
[0037]
Further, the rising and fixing leg shaft 3 is provided with female screws 31a and 31b having different diameters corresponding to different bolts 23 for fixing tires at both ends, and a female screw for screwing a set screw 4 to the bottom of the female screw. 11 is provided.
If the set screw 4 is a countersunk screw as shown in FIG. 3, it will be hidden from the surface of the flat table 1 as shown in FIG.
[0038]
Further, when the tension yarn 7 is provided with a tension holding means using rubber, a spring or a weight, the yarn is tensioned and can be measured accurately.
[0039]
The tension rubber yarn 7 has a hooking means 17 for hooking on the yarn hooking portion 12 of the angle ruler 2 at one end and is longer than the distance between the front and rear tires.
As the latching means 17, a latching lump 26 a or a retaining ring 26 b larger than the thread hooking groove 12 a of the yarn hooking portion 12 is used.
In addition, it is good to use the washer 20 (shown in FIG. 3) for the part fastened by the pivot support fixation by the pivot support bolt 5.
[0040]
[Toe-in measurement method]
Next, a method for measuring toe-in using this apparatus will be described.
In this measuring method, the rising fixed leg shaft 3 is screwed onto a tire fixing bolt 23 attached to a hub portion H of an automobile tire T. Then, the set screw insertion hole 10 of the flat table 1 is aligned with the tip of the rising fixed leg shaft 3 and fixed with the set screw 4.
Then, the angle ruler 2 is fixed horizontally by inserting the pivot bolt 5 with the ruler fixing hole 9 at the center of the flat base 1 and the fixing hole 8 being inserted.
[0041]
Further, as shown in FIG. 7, the threading correction shaft 19 is screwed onto the tire fixing bolt 23 in the rear tire. Then, the angle ruler 2 is fixed horizontally by being inserted into the reference groove line 28.
Then, a hook 27 of the tension yarn 7 is hung on the yarn hooking groove 12 of the angle ruler 2.
Then, as shown in FIG. 2, if the tension yarn 21 hits the line of the toe-in measurement scale 13 and reads the toe-in measurement scale 13, the toe-in inclination b can be measured as it is.
For example, in FIG. 7, 1 ° 40 ′ can be read.
When the tread widths are different, the position of the loop 36 of the tension yarn 7 to be hung on the yarn hooking correction shaft 19 is transferred from the reference groove line 28 to the correction scale groove line 29 by the scale corresponding to the tread width difference. By doing so, the deviation in the front-rear direction caused by the difference in the tread width is eliminated, and the angle can be measured accurately.
[0042]
Moreover, as shown in FIG. 8, the same thing as a front tire can be similarly fixed to a rear tire, and can be measured.
In this case, the hanging lump 27 of the tension rubber thread 7 is hung on the thread hanging groove 12 of both angle rulers 2.
Then, as shown in FIG. 2, if the tension rubber thread 21 hits the line of the toe-in measurement scale 13 and reads the toe-in measurement scale 13, the toe-in inclination b can be measured as it is.
For example, in FIG. 7, 1 ° 40 ′ can be read.
When the tread width is different, the tension thread 7 on one side serving as a reference in the correction scale groove hole 14 provided at the center of the angle ruler 2 is measured in the same manner as in the correction method of the yarn hooking correction shaft 19. When the hooking means is hung, the position can be corrected and the angle can be measured more accurately.
[0043]
[Camber measurement method]
Next, a camber measurement method performed using this apparatus will be described.
In this measuring method, as shown in FIG. 1, the rising and fixing shaft 3 is screwed onto a tire fixing bolt 23 that is attached to a hub portion H of an automobile tire T as in the case of toe-in. Then, the set screw insertion hole 10 of the flat table 1 is aligned with the tip of the rising fixed shaft 3 and fixed with the set screw 4.
Then, the pivoting bolt 5 is inserted by aligning the pivotal support hole 9 and the ruler fixing hole 8 at the center of the flat table 1, and the angle ruler 2 is rotated in the vertical state with the thread catching groove 12 facing upward. Fix it.
[0044]
Then, the hook lump 26 a of the swinging swing 6 is hung on the thread hooking groove 12 a of the angle ruler 2.
Then, as shown in FIG. 4, if the thread 16 hits the line of the camber measurement scale 25 and reads the camber measurement scale 25, the camber inclination a can be measured as it is.
For example, in FIG. 7, 2 ° 50 ′ can be read.
[0045]
【The invention's effect】
The present invention is as described above. Unlike the wheel or the ground, which is likely to be deformed at the reference fixing location, the measurement is performed by directly fixing to the hub portion H of the automobile tire T, so that the accuracy is extremely high. The toe-in and camber angles can now be measured.
In addition, since the device is attached by fixing the bolt to the hub portion H, the device can be mounted and the angle can be measured whether the wheel is attached or removed.
And toe-in measurement can be performed accurately even on gravel roads, bumpy roads, and sloping terrain, which was not possible before, and camber measurement can be performed even on rough ground on horizontal land.
In addition, as described above, the measuring method can be accurately measured as it is, and is very easy to handle by looking at the downscaled yarn and the angle scale where the tension yarn hits.
[0046]
In addition, there is an advantage that the angle of the toe-in and the camber can be adjusted while measuring while looking at the angle scale while the device is attached to the hub portion H of the automobile tire T. In this case, the measurement can be performed while moving the handle. .
In addition, each part is lightweight and small, and it is possible to make the whole compact, and it can be easily stored and carried in a narrow trunk.
In particular, it is an unprecedented great feature that the angle of the toe-in and the camber of an automobile tire can be measured with a single device.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which an angle ruler is mounted on a hub portion in a vertical state in order to measure a camber.
FIG. 2 is a perspective view showing a state in which an angle ruler is mounted on a hub portion in a horizontal state in order to measure toe-in.
FIG. 3 is a perspective view showing an exploded state of the present invention.
FIG. 4 is a front view showing positions of a plurality of set screw holes on a flat base plate.
FIG. 5 is a longitudinal side view of a rising fixed leg shaft showing a state of being fixed to a flat table.
FIG. 6 is a perspective view showing the assembled state of the present invention.
FIG. 7 is a front view showing a scale portion of an angle ruler.
FIG. 8 is a perspective view showing a state in which toe-in is measured by attaching an angle ruler and a threading correction shaft to the hub portions of the front and rear tires.
FIG. 9 is a perspective view showing a state in which toe-in is measured by attaching angle rulers to the hub portions of the front and rear tires, respectively.
[Explanation of symbols]
T Tire H Hub part 1 Flat base 2 Angle ruler 2a Scale plate part 2b Rotating plate part 3 Standing fixed leg shaft 4 Set screw 5 Pivoting bolt 6 Pulling swing 7 Tensioning thread 8 Ruler fixing hole 9 Pivoting hole 10 Screw insertion Hole 11 Female thread for set screw 12 Thread hook portion 12a Thread hook groove 13 Toe-in measurement scale 14 Correction scale groove hole 15 Correction scale 16 Thread 17 Locking means 18 Weight 19 Thread lock correction shaft 20 Split washer 21 Rubber thread 22 Different diameter Identification mark 23 Tire fixing bolt 24 Tire wheel 25 Camber measurement scale 26a Hanging block 26b Hanging ring 27 Hanging block 28 Reference groove line 29 Correction scale groove line 30 Nut 31a Female thread 31b Female thread 32 Threaded part 33 Hanging Stopping means 34 Hanging means 35a Female thread 35b Female thread 36 Hanging ring

Claims (6)

To provide a plurality of set screw insertion holes corresponding to the locations of the bolts or bolt holes for fixing the tires in the hub portion for fixing the tire of an automobile and to pivotally attach an angle ruler to the center of the set screw insertion holes A flat platen with a ruler fixing hole,
A rotating plate portion having a flat surface in close contact with the flat base plate in the center portion and provided with screw insertion holes in the flat surface, and a plate surface standing upright with respect to the rotating plate portion, and both or one end of the plate surface An angle ruler that is shorter than the diameter of the tire, comprising a yarn hooking portion at at least one side of the edge, and a measuring plate portion that has an angular scale in the width direction at the other end edge with the yarn hooking portion as a base point When,
A plurality of upright fixed leg shafts having the same length as a tire fixing bolt or a female screw or a male screw screwed into a bolt hole on one end side and a female screw screwing a set screw on the other end side;
A tire fixing bolt or a female screw or a male screw that is screwed into a bolt hole is provided on one end side, and one reference is provided at a height position equal to the rising height of the thread hook portion of the angle ruler near the other end side. A threading correction shaft provided with a plurality of correction graduation groove lines indicating a distance to the reference groove line and providing a groove line;
A plurality of set screws for fixing the rising fixed shaft and the flat base plate;
A downward swing having a hooking means for the yarn hooking portion at one end and a weight or a weight and a yarn hooking portion at the other end,
At least one end portion has a hooking means for the angle ruler yarn hooking portion and / or the swinging yarn hooking portion, and the other end portion is a ring and / or an angle ruler yarn hanging on the groove line of the yarn hooking correction shaft. A tension thread having a hooking means to the hook and longer than the distance between the front and rear tires,
An angle measuring device for toe-in and camber consisting of   2. The toe-in and camber angle measuring device according to claim 1, wherein a scale hole in the width direction is formed through the center of the angle ruler.   The toe-in and camber angle measuring device according to claim 1 or 2, wherein the set screw insertion hole of the flat base plate is at two or more positions on different equal degrees with the ruler fixing hole as a center.   A plurality of correction graduations in which the threading correction shaft is provided with female screws of different diameters corresponding to different bolts for fixing tires at both ends, and indicates one reference groove line and a distance from the reference groove line toward both ends. The toe-in and camber angle measuring device according to any one of claims 1 to 3, wherein a groove line is provided.   5. The rising and fixing leg shaft is provided with female screws of different diameters corresponding to different bolts for fixing tires at both ends, and female screws for screwing a set screw to the bottom of the female screw. The toe-in and camber angle measuring device according to any one of the above.   The toe-in and camber angle measuring device according to any one of claims 1 to 5, wherein the tension yarn includes tension holding means using rubber, a spring or a weight.

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