KR102139489B1 - Rear camber and tow adjustment method for wheel alignment - Google Patents

Abstract

The present invention relates to a rear camber and tow adjustment method for wheel alignment, which displays a zero target conversion value, generated when the ratio of an RR camber adjustment bolt and an RR tow adjustment bolt is converted into 2:3, during an initial RR camber adjustment bolt adjustment work to enhance worker convenience during wheel alignment rear camber and tow adjustment, comprising the steps of: reading vehicle specifications using a barcode scanner in a state where a wheel alignment adjustment target vehicle is transferred to a normal position of wheel alignment equipment; extracting an initial camber adjustment value and tow adjustment value corresponding to the read vehicle specifications that are displayed as the extracted values on a work display monitor; and converting the camber adjustment value and the tow adjustment value, displayed on the work display monitor, into zero target calculation values and displaying the converted values.

Description

Rear camber and tow adjustment method for wheel alignment}

The present invention relates to a wheel alignment rear camber (Wheel Alignment Rear Camber) and tow (Tow) adjustment method, in particular, the RR camber adjustment bolt (Camber Adjust Bolt) adjustment work in the early stages of the RR camber adjustment bolt and the RR tow adjustment bolt A rear alignment camber and tow for wheel alignment to improve the operator's convenience when adjusting the wheel alignment rear camber and tow by expressing the target conversion value that converts the ratio to a 2:3 ratio. It is about the adjustment method.

In general, wheel alignment (wheel alignment) allows the vehicle to run smoother, has better road surface contact, improves steering, and improves stability on straight or curved roads.

It is to grasp the angular relationship of each component of the steering system and to balance all the forces generated by friction, gravity, centrifugal force and movement while the vehicle is moving.

In the case of deviating from the normal wheel alignment, wheel alignment for the entire automobile wheel is essential as problems such as waste of fuel, wear of tires, steering and vibration, and wear of suspension parts are caused.

On the other hand, the wheel alignment in a car includes a camber (Camber), a caster (Caster), a tow (Tow), an angle of rotation, and a thrust, etc. Among them, the camber is a top of the wheel when viewed from the front or rear of the car wheel This is the degree of inclination outside or inside the car.

A case in which the upper part of the vehicle wheel is inclined outward is referred to as a positive camber, and a case inclined inward is called a negative camber.

The camber generally closes the ground center point of the tire as close to the load center point as possible, and reduces the impact on the road surface by reducing the scrub radius to ease the operation of the steering wheel, while reducing the load applied to the tire of the front wheel. As much as possible, a positive camber is placed on the front wheel to prevent the wheel from slipping out due to the large bearing on the spindle attachment.

The reason why the camber is placed on the wheel of the vehicle is to prevent the front wheel from expanding downward when under load, to prevent the wheel from escaping when driving, to lighten the handle, and to reduce the force to bend the spindle or knuckle. It is to do.

Therefore, when the camber is wrong, fuel is wasted, tires are worn abnormally, and the vehicle is tilted, while there is a problem that the steering wheel is difficult to operate. There is this growing problem.

1 shows a rear camber and tow adjustment system for wheel alignment of a typical automobile.

The rear camber and tow adjustment system for wheel alignment of a general vehicle includes a barcode scanner 20 for reading automobile specifications included in the wheel alignment equipment 10, and a cam bolt fastening equipment 60, It includes a nut runner (70), which is a power tool for cam bolt body diameter, a two-way eyeglass wrench (80) for adjusting cam bolts, and a work display monitor (90) for an operator to check adjustment values.

Here, the work display monitor 90 includes an RR camber value display window 100 displaying an RR camber value and an RR tow value display window 110 displaying an RR tow value.

In addition, the RR chassis module 30 mounted on the vehicle includes an RR camber adjustment bolt 40 which is an RR camber adjustment bolt and a RR tow adjustment bolt 50 which is used for RR tow adjustment. It is equipped.

The process of adjusting the actual rear camber and tow using the rear alignment camber and tow adjustment system for a vehicle configured as described above will be described as follows.

When the vehicle completed on the assembly line passes the OK inspection process and enters the wheel alignment equipment 10, as shown in FIG. 2, the vehicle specification is read by the barcode scanner 20 to program and wheelbase according to the vehicle information. By changing it, the vehicle enters a state where it is possible to enter.

Subsequently, when the screen of the work display monitor 90 is changed to the accessible state, the vehicle enters the wheel alignment equipment 10 to start the wheel alignment adjustment operation.

The operator can adjust the nut runner (70) socket installed in the Cam Bolt Tightening Equip (60) to the fastening nut behind the RR camber adjustment bolt (40) of the RR chassis module (30). After disassembling, the value of the RR camber value display window 100 of the work display monitor 90 is turned by turning the RR camber adjustment bolt 40 using a binocular wrench 80, the value of the RR tow value display window 110 Adjust in the same direction (+, -) smaller.

Subsequently, as shown in FIG. 3, an adjustment operation is performed by fitting a nut runner 70 socket installed in the cam bolt fastening device 60 to a fastening nut behind the RR tow adjustment bolt 50 of the RR chassis module 30. Disassemble to make this possible. Next, by turning the RR tow adjustment bolt 50 using a two-way eyeglass wrench 80, adjust the value of the RR tow value display window 110 of the work display monitor 90 to fit within the specification. Next, adjust the RR camber. Alternately adjust the values of the bolts 40 to fit within the specifications, and when both values fall within the specifications, fasten the nuts on the sides of the RR camber adjustment bolt 40 and the RR tow adjustment bolt 50 using the nut runner 70 To complete the LH side adjustment.

The RH side also performs the adjustment and tightening operation in the same manner as the LH side adjustment method to complete the alignment adjustment operation on the RR side.

On the other hand, conventionally proposed techniques for adjusting wheel alignment of automobiles are disclosed in <Patent Documents 1> to <Patent Documents 2> below.

In the prior art disclosed in <Patent Document 1>, the abnormal deviation of the wheel angle caused by the compressive force generated during the alignment operation is corrected. The wheels are placed in a specific orientation before and after the alignment, and each angle is detected each time. The difference in these angles is the result of abnormal deviations. This amount of deviation may be observed by an operator or corrected in a subsequent angle measurement step by a computer alignment system. Through this process, there is provided a method and apparatus for detecting, displaying and correcting an instantaneous and abnormal change in the alignment angle of a suspension device caused by a compressive force that is likely to occur during alignment.

In addition, the prior art disclosed in <Patent Document 2> is a system for determining the alignment of at least one first wheel of a vehicle, the at least one first target being integrally coupled with the first wheel, the first of the first target A system comprising an image capturing device for capturing a two-dimensional image, and a processing device operatively connected to the image capturing device to process the first two-dimensional image. The first target has a three-dimensional shape suitable for defining geometric variables arranged according to a known three-dimensional arrangement, and the processing device processes the first two-dimensional image to determine the alignment characteristics of the first wheel to identify projections of the geometric variables and , The spatial arrangement of the first target with respect to the coordinate system is determined based on the geometric characteristics of the projections. A system and method for determining vehicle wheel alignment through such a process are provided.

Republic of Korea Patent Publication No. 2001-0012989 (published on February 26, 2001) (correction of abnormal angular deviation generated during wheel alignment) Republic of Korea Registered Patent 10-1879224 (Registration on July 11, 2018) (System and related method for determining vehicle wheel alignment)

However, the general wheel alignment adjustment system and the prior art as described above, the operator disassembles, adjusts, and tightens the RR camber adjustment bolt and the RR tow adjustment bolt, checks the work display monitor value, and checks the nut runner and the ball of the cam bolt fastening device. Because it is a method of performing adjustment work repeatedly by using an eyeglass wrench several times, the phenomenon of increasing fatigue and complaining of musculoskeletal disorders due to the delay of the work time occurs, and re-working by mistaken the direction of the value (+, -) There was a phenomenon in which a request for additional workers was flooded due to an increase in work M/H (MAN/HOUR).

Therefore, the present invention is proposed to solve the general wheel alignment adjustment system as described above and various problems arising from the prior art, and initially adjusts the RR camber adjustment bolt and the RR tow when adjusting the RR camber adjustment bolt. The rear camber for wheel alignment is designed to improve the operator's convenience when adjusting the wheel alignment rear camber and tow by expressing the target conversion value that converts the bolt ratio to a 2:3 ratio. And to provide a tow adjustment method.

In order to achieve the above object, the wheel alignment rear camber and tow adjustment method according to the present invention, (a) the wheel alignment adjustment target vehicle, while the vehicle is transferred to the normal position of the wheel alignment equipment, the barcode scanner Reading the vehicle specifications using; (b) extracting an initial camber adjustment value and a tow adjustment value corresponding to the read vehicle specifications using the specifications and displaying them on a work display monitor; (c) after the step (b), characterized in that it comprises the step of converting and displaying the camber adjustment value and the tow adjustment value displayed on the work display monitor as "0" target calculation values.

In step (c), the actual camber adjustment value and the tow adjustment value are converted into a calculated value for a “0” target by using a formula.

In step (c), after the initial screen is displayed before the adjustment operation, the LH camber "0" target adjustment value is displayed, and the LH tow "0" target adjustment value is displayed by switching to the next operation screen, and the next operation screen is displayed. Switch to and display the RH camber "0" target adjustment value, switch to the next work screen to display the RH tow "0" target adjustment value, switch to the next work screen to display the RR camber and tow adjustment completion value It is characterized by.

According to the present invention, by expressing the adjustment value of the rear camber and tow adjustment value converted to a "0" target using a "0" target formula, the number of times the operator repeats disassembly, adjustment, and tightening operations during wheel alignment adjustment. It has the effect of improving workability by minimizing.

In addition, according to the present invention, by expressing an adjustment value that converts the rear camber and tow adjustment values to a “0” target using a “0” target formula, the operator eliminates the inconvenience of directly calculating the camber and tow adjustment values. At the same time, there is an effect that can improve problems such as work delay due to the same direction (+, -) error.

In addition, according to the present invention, there is an effect capable of improving problems such as excessive adjustment work time, musculoskeletal disorders, and requests for additional workforce through improvement of workability.

1 is a configuration diagram of a rear camber and tow adjustment system for wheel alignment of a typical vehicle,
2 and 3 are exemplary views of a rear camber and tow adjustment operation for a wheel alignment in a conventional vehicle,
Figure 4 is an illustration of the correlation between the RR camber adjustment bolt and the RR tow adjustment bolt in the present invention,
Figure 5 is an exemplary view of the adjusted value converted by applying the target conversion formula camber value "0" in the present invention,
6 is an exemplary view of a rear camber and tow adjustment operation screen for a wheel alignment of a vehicle in the present invention.

Hereinafter, a method for adjusting a rear camber and a tow for wheel alignment according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5 is an example of an adjustment value converted by applying a target conversion formula of a camber value "0" in the present invention, and FIG. 6 is an exemplary view of a rear camber and tow adjustment operation screen for a wheel alignment of a vehicle in the present invention.

The rear camber and tow adjustment system for a wheel alignment of a vehicle to which the present invention is applied is the same as the rear camber and tow adjustment system for a wheel alignment of a general vehicle shown in FIG. 1. Hereinafter, it is assumed that the rear camber and tow adjustment method for a wheel alignment of the present invention is applied to a rear camber and tow adjustment system for a wheel alignment of a general vehicle as shown in FIG. 1.

The present inventor repeatedly disassembles, adjusts, and tightens the RR camber adjustment bolt and the RR tow adjustment bolt by a conventional worker, and repeatedly checks the work display monitor value and repeats it several times by using a nut runner and an eyeglass wrench of the cam bolt tightening equipment. The problem of complaining of increased fatigue and musculoskeletal disorders due to the delay of working time, the problem of reworking by mistake of the direction of value (+, -), and M/H(MAN /HOUR) In order to improve the problem that the request for additional workers occurs due to the increase, the correlation between the RR camber adjustment bolt and the RR tow adjustment bolt was analyzed.

As a result of analyzing the correlation between the RR camber adjustment bolt and the RR tow adjustment bolt, as shown in FIG. 4, when adjusting the RR tow adjustment bolt 50 after the adjustment operation of the RR camber adjustment bolt 40, the RR camber value It was confirmed that the value of the display window 100 is proportionally adjusted in a 2:3 ratio compared to the adjustment amount of the RR tow value display window 110 value.

Therefore, when adjusting the wheel alignment, when adjusting the RR camber adjustment bolt 40, the ratio was adjusted to a 2:3 ratio, and reflected in the assembly work specifications to be fastened to minimize the repetition of disassembly, adjustment, and fastening.

Although the work discomfort for the primary wheel alignment adjustment was improved in the same manner as described above, the rear camber and tow values are simultaneously changed in a 2:3 ratio when the RR camber adjustment bolt 40 is adjusted. Since it was difficult to fit and the operator had to make adjustments while making calculations, there was a problem of work delay and rework due to the operator's error in the direction of the value (+, -).

Therefore, the present inventor has also improved the above problems, and eliminates the hassle of performing the adjustment work while the operator separately calculates to provide the optimal wheel alignment adjustment method.

For example, the following formula is applied to the work display monitor 90 in a way that the operator can work with the "0" target of the RR cam value display window 100 value of the work display monitor 90 screen without calculating separately. By doing so, the value converted from the RR camber value display window 100 value to the “0” target calculation rather than the actual RR camber value is displayed, and at the same time, a problem caused by the error in the direction (+, -) of the value is not caused.

In other words, in the first step, while the vehicle for the wheel alignment adjustment target is transferred to the normal position of the wheel alignment equipment, the vehicle specifications are read using a barcode scanner.

Subsequently, the initial camber adjustment value and the tow adjustment value corresponding to the read vehicle specifications are extracted using the specifications and displayed on the work display monitor.

Next, the camber adjustment value and the tow adjustment value displayed on the work display monitor are converted and displayed as a calculated value for the “0” target using Equation 1 below.

Here, T is a tow value, C is a camber value, and X is a camber value conversion value ("0" target worker screen display).

5 is an example of a value obtained by converting a camber value into a “0” target calculation value using the above formula.

When the actual operator adjusts the wheel alignment while checking the work display monitor, the adjustment values displayed on the work screen of the work display monitor are shown in FIG. 6.

That is, after displaying the initial screen before the adjustment operation as shown in FIG. 6(a), the LH camber “0” target adjustment value is converted to the above formula and expressed as (b), and the next operation screen is switched to LH tow. The target adjustment value of "0" is converted to the above formula and expressed as in (c).

Subsequently, by switching to the next work screen, the RH camber "0" target adjustment value is converted into the above formula and expressed as (d), and by switching to the next work screen, the RH tow "0" target adjustment value is converted into the above formula. Express as in (e), and switch to the next work screen to display the RR camber and tow adjustment complete values as in (f).

In FIG. 6, the screen switching may be switched to the next screen by an operator operating a separately provided screen switching button.

According to the present invention, by adjusting the RR camber adjustment bolt 40 when adjusting the wheel alignment, by expressing the adjusted value in a 2:3 ratio, the operator can fasten it, and the operator disassembles and adjusts it as before. The problem of repeating the fastening operation was minimized.

In addition, by eliminating the process that the operator directly calculates as in the past, and also improving the problems for the misdirection in the same direction (+, -), problems such as work delays are improved, excessive adjustment time, musculoskeletal disorders, and additions It will be able to solve problems such as requests to fill the workforce.

The invention made by the present inventors has been described in detail according to the above embodiment, but the present invention is not limited to the above embodiment and can be changed in various ways without departing from the gist thereof. It is obvious to those who have it.

10: wheel alignment equipment 20: barcode scanner
30: RR chassis module 40: RR camber adjustment bolt
50: RR tow adjustment bolt 60: Cam bolt fastening equipment
70: nut runner 80: binocular glasses wrench
90: Work display monitor 100: RR camber value display window
110: RR tow value display window

Claims (3)

As a method of adjusting the rear camber and tow for the wheel alignment of the vehicle,
(a) reading a vehicle specification using a barcode scanner while the vehicle for the wheel alignment adjustment target is transferred to a normal position of the wheel alignment equipment;
(b) extracting an initial camber adjustment value and a tow adjustment value corresponding to the read vehicle specifications using the specifications and displaying them on a work display monitor; And
(c) after the step (b), converting and displaying a camber adjustment value and a tow adjustment value displayed on the work display monitor into a calculated value for a “0” target, and displaying the same.
In the step (c), the rear camber and tow adjustment method for wheel alignment is characterized in that the actual camber adjustment value and the tow adjustment value are converted into a calculated value for a “0” target using the following formula.

Here, T is a tow value, C is a camber value, and X is a camber value conversion value ("0" target worker screen display).
delete In claim 1, in step (c), after displaying the initial screen before the adjustment operation, the LH camber "0" target adjustment value is displayed, and the next operation screen is switched to the LH tow "0" target adjustment value, Switch to the next work screen to display the RH camber "0" target adjustment value, switch to the next work screen to display the RH tow "0" target adjustment value, and switch to the next work screen to display the RR camber and tow adjustment completion values. A rear camber and tow adjustment method for wheel alignment, characterized in that it is expressed.

Images