JP3080994U - Simple wheel alignment measuring instrument for automobiles - Google Patents

Abstract

(57) [Summary] The present invention facilitates measurement of a toe angle deviation between left and right rear tires, and measurement and determination of an axle deviation between front and rear axles. At the same time, the error of the artificial measurement value due to skill is reduced. At the same time, it does not require a fixed space for measurement, is easy to carry, and enables inexpensive production from the viewpoint of production. The present invention uses a measuring device having a frame structure to maintain a fixed distance to measure wheel alignment inside a complicated body frame, and by direct or indirect measurement. Enabled measurement of wheel alignment without using electronic technology. We have also developed a wheel alignment measuring device that simplifies the structure of the measuring device, is inexpensive, does not require dedicated space, and does not require any experience. This will contribute to the widespread use of factories and individuals who have forgotten the introduction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wheel alignment tester for vehicle maintenance.

[0002]

[Prior art]

 With conventional wheel alignment testers, the only measuring instruments that can measure four wheels simultaneously with a single measuring instrument are electronic measuring instruments that use electronic devices or stationary measuring instruments that cannot be easily moved with large scale was

[0003]

[Problems to be solved by the invention]

 For electronic measuring instruments using electronic equipment and large measuring instruments even for mechanical type, the cost was very high and it was not very affordable for small maintenance shops and individuals. Also, a dedicated space was required. In particular, measuring the axle misalignment between front and rear was a very time-consuming task with conventional mechanical measuring instruments. Furthermore, with mechanical measuring instruments, there were no inexpensive measuring instruments that could measure camber angle, caster angle, toe, wheelbase, and axle misalignment at once. This measuring instrument aims to solve the above-mentioned drawbacks by reducing the cost and requiring no special technology.

[0004]

[Means for Solving the Problems]

 The present invention implements direct and indirect measurements to enable measurement of the wheel alignment inside the complex body frame. A frame that measures while maintaining a fixed distance was adopted so that measurement could be performed at a fixed distance from the complex body frame. At the same time, the center of the marking sheet for measurement is set vertically and vertically at the leading end of the lower part of the weight for positioning, which hangs vertically from the frame via a thread. The number of installations per tire is three at the front, rear, and center. After completing this work for each tire, move the vehicle back and forth or in the ascending direction, and measure the required two points on a scale with a linear distance from the center point of each measurement marking sheet as a reference. . The measured distance is used as a real or virtual numerical value, and the virtual numerical value is calculated by correcting the distance and angle to the measured object from this measured value, and using that numerical value as a measurement result to form a formal numerical value. . In addition, by providing a goniometer in the frame, the camber angle and caster angle can be measured at the same time. As a result, it was possible to solve the problem by measuring the wheel alignment and measuring the deviation between the front and rear axles while using an inexpensive mechanical system.

[0005]

[Embodiment of the invention]

 This measuring instrument is equipped with a horizontal instrument that produces horizontal in the vertical and horizontal radial directions so that the measurement value is constant, in order to prevent errors from occurring by the person who performs the measurement. When measuring the camber angle and caster angle, a detachable magnet attachment for angle measurement is attached to the measurement frame so that the measuring device can be accurately applied to the edge of the wheel rim. . This attachment is to prevent the influence of the bulge due to the weight of the lower part of the tire when measuring the angle.

[0006]

【Example】

 An embodiment will be described below according to the attached documents. In preparation for measurement, the vehicle R is stopped in a straight state on a flat floor or the ground 1A with little distortion. 3A is a hub centering sheet for easily detecting the center of each wheel hub. This 3A is a magnet type, and is attached while adjusting the position to each wheel nut 1D. Apply the measuring instrument frame of 2A to the center 3B of 3A while keeping the level of the measuring instrument frame to the tire 1C. At this time, the center mark of 2B at the center of 2A is aligned. At the same time, the level is maintained by the 3C leveler bonded to 2A. Next, there are a total of three positions on the left, right, and center of the 2D positioning weight that hangs vertically from the 2A via the thread 2C, and waits for the 2D to stand still. When 2D is in a state, the marking sheet 3D placed on 1A is vertically aligned with the 2D lower protruding end 2D1 and the 3D centers 3D1 and 2D1 are aligned vertically and vertically, and all three places are aligned. Put. The above operation is performed at all four locations 1C or 1B. Next, the camber angle is measured with a 2E goniometer. In preparation for the measurement by 2E, 2E1 which is a magnet attachment is attached to the 2A1 surface of 2A. At this time, the diameter is previously adjusted to the diameter of 1B1 which is the edge of the wheel. Next, 2C2 which is a loop portion of the thread 2C1 attached to the weight of 2D2 is applied to the projection 2D on the upper part of 2E. This completes the preparation and moves on to measurement. In the measurement, 2E1 attached to 2A is vertically applied to 1B1. At this time, adjust while watching 3C so that 2A is vertical. When 2D2 stops, read the numerical value of 2E2, which is the scale overlapping 2C1 via 2D2, and record the numerical value. Then, turn the handle of R to the right until it stops, measure and record the angles of the left and right front 1B1 in the same manner as the measurement of the camber angle. Then, turn the handle of R to the left until it stops, measure and record the angle of 1B1 as described above. At the end of the above work, move R forward, backward or upward and stop. A total of 12 pieces of 3A remaining after R is moved are measured for a necessary distance between each two points by a scale 3E, and the measured values are recorded.

[0007] Of the recorded numerical values, numerical values that require correction are corrected by calculation to obtain accurate values.

[0008]

[Effect of the invention]

 As described above, the wheel alignment measuring device of the present invention enables measurement of wheel alignment of four wheels by a simple method, facilitates quantitative determination of comprehensive wheel alignment, and is useful for measures therefor.

[Brief description of the drawings]

FIG. 1 is a three-view drawing showing one embodiment of a simple wheel alignment measuring device of the present invention.

FIG. 2 is a diagram of a tire, a wheel, and a wheel nut showing an embodiment of the simplified wheel alignment measuring device of the present invention.

FIG. 3 is a view of a centering sheet which can easily position a center of a hub serving as a reference, showing a partial embodiment of the simple wheel alignment measuring device of the present invention.

FIG. 4 is a two-side view of a marking sheet for measurement showing a partial embodiment of the simplified wheel alignment measuring device of the present invention.

FIG. 5 shows a partial embodiment of the simplified wheel alignment measuring instrument of the present invention, a weight for alignment which hangs vertically from the main body frame, and a marking sheet for measurement placed on a vertical line with the tip of the weight. FIG.

FIG. 6 is a front view showing alignment of a marking sheet, showing a partial embodiment of the simplified wheel alignment measuring device of the present invention.

FIG. 7 is a partially cutaway cross-sectional view showing a state at the time of alignment, showing a partial embodiment of the simplified wheel alignment measuring device of the present invention.

FIG. 8 is a view showing a partial embodiment of the simplified wheel alignment measuring device according to the present invention, showing a state where the vehicle is stopped on a flat floor or the ground in preparation for measurement.

FIG. 9 is a view showing a partial embodiment of the simplified wheel alignment measuring device of the present invention, showing the completion of the alignment of the marking sheet.

FIG. 10 shows a partial embodiment of the simplified wheel alignment measuring device according to the present invention.
It is a figure showing the center point of each marking sheet and its measurement.

FIG. 11 is a partially cutaway sectional view showing a measurement state of a camber angle and a caster angle by the simple wheel alignment measuring device of the present invention.

FIG. 12 is a plan view of the measuring device when measuring an angle, showing a partial embodiment of the simplified wheel alignment measuring device of the present invention.

[Explanation of symbols]

1A Flat and level ground or floor 1B Wheel 1B1 Wheel rim 1C Tire 1D Wheel nut 2A Measurement frame 2B Center mark of measurement frame 2C Thread 2C1 Thread for suspending angle meter 2C2 2C1 2D Weight for positioning 2D1 Bottom tip when weight is suspended 2D2 Weight of weight for angle meter 2E Acrylic plate for angle meter 2E1 Magnet attachment 2E2 Scale written on acrylic board 2F Acrylic board 3A Hub center alignment mark 3A2 Magnet surface 3B Center position of 3A 3B1 Alignment line 3C Leveler for measuring radial direction 3D Marking sheet for measurement 3D1 Center position of 3D R To obtain body W1 toe Between the left and right tires Distance W2 Distance between left and right tires to find toe, W3 Distance between left and right tires to find toe, W4 Distance between left and right tires to find toe, X To find deviation in rear tire direction , Diagonal distance Y Diagonal distance to determine deviation in the direction of the rear tire WB1 Wheelbase distance WB2 Wheelbase distance

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[Procedure amendment]

[Submission date] May 10, 2001 (2001.5.1
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (1)

[Utility model registration claims] 1. A simple mechanical alignment measuring device for measuring the wheel alignment by attaching an attachment to a tire and a wheel of an automobile and keeping a predetermined distance from a vehicle body frame.