KR0174002B1 - Three-dimensional relative displacement and goniometer - Google Patents

Abstract

Regardless of the height of the wheel hub and the body, it is easy to measure the angle and displacement of the front wheel alignment elements, and it is possible to perform geometric measurements according to the load load such as the tolerance state or loading state. The aim is to provide a three-dimensional relative displacement and angle measuring instrument that can reduce the economic burden at the same time as the plan.

Accordingly, the upper arm is fixed to the vehicle body; A lower arm spaced apart from the upper arm by a predetermined distance and fixed to the hub of the front wheel, the lower arm having first measuring means for measuring the caster, camber angle and tread displacement, which are front wheel alignment elements; It is characterized in that it comprises a support arm coupled to the upper arm and the lower arm and the ball joint described above and bowing the second measuring means for measuring the front wheel stroke and toe angle.

Description

3D relative displacement and angle measuring instrument

1 is an exploded perspective view of a measuring instrument according to the present invention.

2 is an assembled perspective view of the present invention.

3 is a right side view of the measuring instrument according to the present invention.

4 is a plan view of a measuring instrument according to the present invention.

5 is a front view of the measuring instrument according to the present invention.

* Explanation of symbols for main parts of the drawings

1: instrument 3: upper arm

3a, 7a, 9a: first arm 3b, 7b, 9b: second arm

5: front wheel 7: lower arm

9: support arm 11, 13, 23: 1st, 2nd, 3rd level

15, 17, 19, 21: rulers 1, 2, 3, 4

[Industrial use]

The present invention relates to a three-dimensional relative displacement and angle measuring instrument, and more particularly, it is easy to measure the angle and displacement of the front wheel alignment element irrespective of the height of the wheel hub and the vehicle body, The present invention relates to a three-dimensional relative displacement and angle measuring instrument that enables geometric measurement according to load loading such as loading state.

[Prior art]

In general, the front wheels that support the load on the front of the car are mounted on the front axle at some geometric angle.

This geometric angular relationship of the front wheels is called the front wheel alignment, which is a camber in which the front wheels are installed at a predetermined angle with respect to the waterline, and the distance between the centerlines of both wheels when viewed from above. When the front wheel is seen from the side when the front wheel is viewed from the side, the king pin which installs the front wheel on the axle is fixed at a certain angle with the repair, and when the car is viewed from the front of the caster and the car Kingpin angle of inclination.

This front wheel alignment makes steering wheel steering easier and less reliable while driving the vehicle, while ensuring a stable and stable wheel, and plays an important role in reducing steering wheel resilience and tire wear. Measurements should be made accurately and quickly.

In the case of a passenger car, such a measurement of the front wheel alignment is dependent on the measurement of a wheel geometry measuring instrument or a SPMD (Suspension Parameter Measure Device). The measuring device is mainly fixed to the lower portion of the hub of the wheel, The fixed installation on the body makes it possible to measure each element of each front wheel alignment.

[Problem to Solve Invention]

Such a conventional front wheel alignment measuring device can measure the geometric angle and displacement of the front wheel alignment elements when the distance between the wheel hub and the body of the vehicle to be measured is constant, but the body from the wheel hub of the vehicle When the heights of the and do not match, that is, when applied to commercial vehicles, separate jig for holding the vehicle body must be manufactured according to the dimensions, and the measuring device must be installed. There is an uneconomical problem because of the high price.

The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to measure the angle and displacement of the front wheel alignment element regardless of the height of the wheel hub and the vehicle body. The present invention provides a three-dimensional relative displacement and angle measuring instrument that enables easy and accurate geometric measurement according to load loading, such as tolerance state or loading state, and can reduce the burden on the economy at low cost.

[Means to solve the problem]

The present invention to achieve the above object, the upper arm fixed to the vehicle body; A lower arm spaced apart from the upper arm by a predetermined distance and fixed to the hub of the front wheel, the lower arm having first measuring means for measuring the caster, camber angle and tread displacement, which are front wheel alignment elements; A three-dimensional relative displacement and angle meter comprising a support arm coupled to the upper and lower arms and ball joints described above and bowing a second measuring means for measuring front wheel stroke and toe angle.

The upper arm is characterized in that the first arm fixed to the vehicle body is hinged by the hinge axis of the first arm, which is ball jointly coupled to the support arm, so that the second arm is rotatable in the z-axis direction.

In addition, the first measuring means comprises a first level gauge for measuring the displacement of the caster angle, a second level gauge for measuring the displacement of the camber angle, and first and second rulers for measuring the tread displacement. It features.

The lower arm is fixedly mounted to the hub of the front wheel and is slidably coupled to the first arm, the first arm having first and second level gauges and the first ruler, and the support arm and the ball joint coupled to the first arm. And a second arm in which a second ruler coincides with one ruler.

In addition, the second measuring means is characterized in that it comprises a third, fourth rulers for measuring the stroke of the front wheel, and a third level gauge for measuring the displacement of the toe angle.

The support arm is coupled to the second arm of the upper arm and the ball joint, the first arm formed with a third ruler, and the fourth ruler that is inserted into the first arm and slidably coupled to the first arm and coincides with the third ruler. Is formed, and has a third level gauge for measuring the toe angular displacement, as well as a second arm of the lower arm and a second arm coupled to the ball joint.

The first arm of the support arm is formed of a hollow hollow tube type so that the second arm slides freely in response to the full bump of the vehicle body.

[Action]

According to the present invention, the first and second arms of the upper and lower arms are respectively coupled, and the first and second arms of the support arm are coupled, and then the support arms are coupled to the upper and lower arms.

In this state, the upper and lower arms are fixed to the vehicle body and the front wheel, respectively, so that the mounting of the measurement ready state of the measuring device, which is a measuring device of the front wheel alignment elements, is completed.

At this time, before measuring the displacement of each element, adjust the zero point of the first, second, third level gauge, check and record the values of the first, second and third rulers, and then record the rotation angle displacement in the x-axis direction. Is measured by the second level and the rotation angle displacement in the y-axis direction is measured by the first level and the third level bar, the angle displacement in the x-axis direction, that is, the camber angle of the front wheel alignment. The change is confirmed by the scale of the angular displacement as the bubble of the second level system moves, and the rotational angular displacement in the y-axis direction, that is, the caster is checked by the scale as the bubble of the first level system moves. .

In addition, the angular displacement of the toe angle shown by rotating the front wheel in the z-axis direction is provided in the support arm as a three-dimensional linkage movement is generated by the support arm coupled to the lower arm and the upper arm. The third level gauge is moved according to the angular displacement in which the bubble rotates about the y-axis direction and checks the scale, thereby measuring the change in the tow angle.

And the up and down stroke displacement of the front wheel is measured by the displacement amount of the third and fourth rulers formed on one side according to the elastic displacement of the first and second arms of the support arm, and calculates the difference from the scale checked during zero adjustment, and thus the displacement amount in the z direction. The tread change of the front wheel is possible by measuring the displacement of the first and second rulers as the first and second arms of the lower arm fixed to the hub are slid, and calculating the difference from the scale determined during zero adjustment. Done.

EXAMPLE

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are exploded perspective and assembly perspective views of the three-dimensional relative displacement and angle measuring instrument according to the present invention, and FIGS. 3 and 4 are right side and top views of the measuring instrument of the present invention, and FIG. 5 is a front view. Reference numeral 1 denotes a measuring instrument.

The measuring instrument 1 measures the angular displacement and the vertical displacement of each element of the front wheel alignment, and is fixed to the upper arm 3 connected to the vehicle body (not shown) and the hub of the front wheel 5. It consists of an arm 7 and a support arm 9 connecting the upper arm 3 and the lower arm 7.

The upper arm 3 is coupled to the first and second arms 3a and 3b by the hinge shaft 3c to be rotatable in the horizontal direction, and is fixed to the vehicle body.

In addition, the lower arm 7 is slidably coupled to the first arm 7a fixed to the hub of the front wheel 5 and the second arm 7b to be ball-joined to the support arm 9. The first arm 7a includes a first level gauge 11 that measures rotational displacement rotated about the y axis, that is, caster change of the front wheel alignment, and rotational displacement rotated about the x axis, that is, camber change. A first ruler 15 having a second level gauge 13 to measure and measuring a displacement in the y-axis direction, that is, a tread change is formed, and the first arm 7a is formed on the second arm 7b. A second ruler 17 is formed to coincide with the formed first ruler 15 of φ to measure the displacement of each element of the front wheel alignment.

In addition, the support arm 9 is slidably coupled to the first arm 9a and the first arm 9a that are ball jointly coupled to the second arm 3b of the upper arm 3, as well as the lower portion. The second arm 7b of the arm 7 and the second arm 9b coupled to the ball joint are configured to measure displacement in the z-axis direction. The first arm 9a is a full bump of the vehicle. In the bump, the second arm 9b is slid to form a hollow hollow tube so as to pass freely, and a third ruler 19 is formed on one side to measure vertical displacement in the z-axis direction. The second arm 9b is formed with a fourth ruler 21 coinciding with the third ruler 19 of the first arm 9a and measures the z-axis rotation of the front wheel 5, that is, the change in the toe angle. A third level gauge 23 is provided to measure each element of the front wheel alignment.

The three-dimensional relative displacement and angle measuring device of the present invention configured as described above first combines the first and second arms 3a, 3b, 7a, and 7b of the upper and lower arms 3, 7, respectively, to support arms. The first and second arms 9a and 9b of (9) are coupled, and then the support arms 9 are coupled to the upper and lower arms 3 and 7.

In this state, the upper and lower arms 3 and 7 are fixed to the vehicle body and the front wheels 5 so that the mounting of the measurement ready state of the measuring device 1, which is a measuring device of the front wheel alignment elements, is completed. do.

At this time, before measuring the displacement of each element, the zero point of the first, second, third level gauges 11, 13, 23 is adjusted, and the first, second rulers 15, 17 and the third, fourth rulers ( 19) (21) after confirming and recording the numerical value, the rotation angle displacement with respect to the x-axis direction is measured by the second level meter 13, and the rotation angle displacement with respect to the y-axis direction is measured by the first level meter 11 And measured by the third level gauge 23, the angular displacement in the x-axis direction, that is, the change in the camber angle of the front wheel alignment, the direction of the arrow of the bubble of the second level gauge 13 shown in FIG. The angular displacement of the first axis gauge 11, i.e., the caster, is measured as the bubble of the first level gauge 11 moves in the direction of the arrow shown in FIG. Will be confirmed.

In addition, the angular displacement of the toe angle shown by rotating the front wheel 5 in the z-axis direction is three-dimensional by a support arm 9 which is ball jointed to the lower arm 7 and the upper arm 3. The third level gauge 23 provided on the support arm 9, which will be treated as a normal linkage movement occurs, is moved in the direction of the arrow of FIG. 3 in accordance with the angular displacement of the bubble rotating about the y-axis direction, thereby checking the scale. The toe angle change is then measured.

The up and down stroke displacement of the front wheels 5 corresponds to the displacement amount of the third and fourth rulers 19 and 21 formed on one side according to the stretching displacement of the first and second arms 9a and 9b of the support arm 9. The displacement is measured in the z-direction by calculating the difference from the scale determined at the time of zero adjustment, and the tread change of the front wheel 5 is the first and second arms 7a of the lower arm 7 fixed to the hub. By measuring the displacements of the first and second rulers 15 and 17 as the 7b slides, it is possible to calculate the difference from the scale determined at the zero point adjustment.

Therefore, the geometric angular displacement of the front wheel alignment according to the load loading of the tolerance weight state and the maximum loading state of the vehicle, as well as the upper and lower displacement amount can be measured.

[effect]

As described above, the three-dimensional relative displacement and angle measuring instrument of the present invention, the measuring arm consisting of upper and lower arms and the support arm is capable of sliding the support arm so as to overcome the height difference between the hub of the front wheel and the vehicle body. Because it is combined, it can be applied to all models regardless of the height difference between the hub of the front wheel and the vehicle body, so it is easy to install, and it is easy to install the measuring instrument that measures each element of the front wheel alignment without using a separate jig. Because it is possible to make accurate measurement as well as quick measurement, it is a useful invention that has an economic advantage because the manufacturing cost is low.

Claims (7)

An upper arm fixed to the vehicle body; A lower arm spaced apart from the upper arm by a predetermined distance and fixed to the hub of the front wheel, the lower arm having first measuring means for measuring the caster, camber angle and tread displacement, which are front wheel alignment elements; A three-dimensional relative displacement and angle measuring instrument comprising a support arm coupled to the upper arm and the lower arm and having a second measuring means for measuring front wheel stroke and toe angle. The upper arm is characterized in that the first arm fixed to the vehicle body is hinged by the hinge axis of the first arm, which is ball jointly coupled to the support arm, so that the second arm is rotatable in the z-axis direction. Three-dimensional relative displacement and angle measuring instruments. The method of claim 1, wherein the first measuring means comprises a first level gauge for measuring the displacement of the caster angle, a second level gauge for measuring the displacement of the camber angle, and first and second rulers for measuring the tread displacement. 3D relative displacement and angle measuring instrument. 4. The lower arm of claim 1, wherein the lower arm is fixedly mounted to the hub of the front wheel and is slidably coupled to the first arm and holds the first and second level gauges and the first ruler, the support arm and the ball. A three-dimensional relative displacement and angle measuring instrument, characterized in that the joint consists of a second arm formed with a second ruler coinciding with the first ruler. 2. The three-dimensional relative displacement and angle of claim 1, wherein the second measuring means comprises third and fourth rulers for measuring the stroke of the front wheel, and a third level gauge for measuring the displacement of the toe angle. Instrument. 2. The support arm of claim 1, wherein the support arm is ball jointed with the second arm of the upper arm, and the first arm having the third ruler formed therein is slidably coupled to the first arm and coincides with the third ruler. Fourth ruler is formed, the three-dimensional relative displacement and angle measuring instrument, characterized in that it has a third level gauge for measuring the toe angular displacement and consists of the second arm of the lower arm and the second arm coupled to the ball joint . The three-dimensional relative displacement and angle measuring instrument according to claim 6, wherein the first arm of the support arm is formed of a hollow hollow tube type so that the second arm slides freely in response to the full bump of the vehicle body.