JP2002340743A - Measuring instrument for vehicle and/or compound type vehicle inspection apparatus formed by integrating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compound type vehicle inspection apparatus for executing each kind of inspection being effective for safe operation without increasing the cost simultaneously with legal vehicle inspection. SOLUTION: The car inspection apparatus having a roller type side slip tester section, a speedometer tester section, a brake tester section, and a measuring instrument of toe and chamber angles is provided with an inspection function for inspecting the failure in the peripheral section of a differential gear. Left/ right axles located nearly coaxially are rotated independently for detection via the differential gear, and the unbalance is detected as a failure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring instrument for a vehicle provided with a means for detecting an abnormality in a peripheral portion of a differential gear of a vehicle, and / or to a composite type vehicle inspection apparatus in which these are assembled.

[0002]

2. Description of the Related Art Recently, the number of car owners who perform alignment adjustment for stable running of vehicles has been increasing. Prevents uneven wear of tires and improves vehicle stability during high-speed driving by adjusting the wheel alignment (especially camber toe angle) of the vehicle (the vehicle vibrates during high-speed driving, and the vehicle fluctuates when changing lanes or cornering) It is said that the improvement can be achieved.

[0003] The effect of the wheel alignment adjustment will be described below. First, the tire generates a lateral force due to the camber toe angle. The tire goes straight while trying to shift to the right or left by this lateral force. The tire lateral force generated on each wheel is an important force that is dependent on the vehicle to perform an independent motion (straight-moving by steering or cornering). The current alignment adjustment aims at enabling stable running by adjusting the camber toe angle within the range of the "manufacturer reference value" of each vehicle.

That is, by adjusting the camber toe angle, the lateral force generated by the tire is adjusted. However, even when the wheel alignment is the same, the generated lateral force measured by the characteristics of the tire, the rigidity and balance of the suspension, and the like is different. Further, even if the camber toe angle is adjusted within the range of the “manufacturer reference value” of each vehicle, the lateral force of each of the left and right wheels is not necessarily the same. Therefore, it is important to balance the lateral force between the left and right wheels. The effect of adjusting the wheel alignment appears only when the lateral force actually generated on the tire is confirmed. Stable running of the vehicle can be achieved not only by the numerical value of the camber toe angle but also by obtaining a lateral force balance (side slip balance) actually generated on the left and right rear wheels.

[0005] If the lateral force balance of the rear wheels is deviated, the rear wheels are not stabilized during straight running, causing the vehicle to fluffy, causing problems such as vibration of the vehicle body during high speed running. By directly measuring the lateral force (side slip amount) of each tire, adjusting the side slip balance for running stability and adjusting the rear wheel lateral force balance, the grip force in the tire traveling direction on the road surface is improved, and the steering wheel In addition to improving the feeling of sitting, the steering operation during straight running becomes easier, and the running stability of the vehicle can be realized, for example, the vehicle becomes stable when cornering or changing lanes.

Conventionally, this type of vehicle measuring instrument and / or a composite type vehicle inspection device (hereinafter, referred to as a “vehicle inspection device”) in which the measurement devices are assembled are a front wheel mounting portion and a rear wheel mounting portion. The inspection vehicle to be inspected is configured to be mounted, and a general inspection is performed by a speedometer tester unit and a brake tester unit provided in the vehicle inspection device. The brake tester unit includes a pair of brake rollers, a motor for driving the pair of brake rollers, and a brake roller that is lifted from below to bring the brake roller into contact with a running surface of a wheel to be inspected. And a braking force detector for detecting the resistance of the brake roller as a braking force. The brake roller when the vehicle brake is operated while driving the drive motor and driving the brake roller. Is detected as a braking force.
On the other hand, the speedometer tester detects a rotational driving force of a wheel rotationally driven by an engine of an inspection vehicle, or a speedometer roller rotationally driven by a motor provided in a vehicle inspection device, and a rotational speed of the speedometer roller. And a detection device that checks whether the speedometer is appropriate for the inspection vehicle speed based on a difference between a detection value of a vehicle speedometer mounted on the vehicle and a detection value of the detection device.

Further, a side slip tester provided in accordance with the general inspection means slides in the axial direction of the wheel corresponding to the lateral force generated in the axial direction as the wheel of the inspection vehicle rotates. In a composite type vehicle inspection device having a roller type side slip tester capable of measuring the lateral force by a sliding amount of a movable side slip test drum, a vehicle side slip amount, that is, a lateral force when passing through a specified distance is measured. ,
Except for the wheels whose lateral force is to be measured, the simulation can be performed by a stationary vehicle.

[0008] The composite type vehicle inspection device provided with the roller type side slip tester is "Japanese Patent No. 1980353" published in Japanese Patent Publication No. 4-23207 and filed by the present applicant. As a similar example, Japanese Patent Application Laid-Open No. Hei 9-28109 discloses "Patent No. 296.
No. 1403 "is similarly patented. The composite vehicle inspection device incorporating the toe angle and camber angle measuring devices is a technology disclosed in Japanese Patent Application No. 2000-179458, and has been filed by the present applicant.

Further, if the applicant of the present application has developed a lateral force (lateral force) tester (Japanese Patent No. 1980353),
By wheel alignment, the actual measured value of the tire lateral force generated on each wheel alone at the basic low speed is directly measured. Instead of the angle data by the alignment tester, the actually generated tire lateral force is displayed as the side slip amount. If the vehicle also has a function of adjusting the camber / toe angle, the camber / toe angle may be adjusted while the vehicle is mounted on the composite vehicle inspection device having the lateral force tester.
The toe angle can be adjusted. Since the measured value of the lateral force tester is an actual measured value obtained by directly measuring the tire lateral force as a result of adjusting the camber toe angle, it can be confirmed that the adjusted result is surely reflected on the vehicle.

[0010]

As described above, the conventional vehicle inspection device is generally configured so that the speedometer and the brake can be inspected by the speedometer tester and the brake tester. is there. In order to ensure safe and comfortable driving, it was desired to inspect items other than the legal inspection items and to provide highly reliable information by the user's optional choice. In some cases, it was possible to measure the change in the lateral force of the vehicle body caused by the change.

However, if the toe angle and the camber angle of the wheels are also detected during vehicle inspection and maintenance, and if the vehicle is maintained based on the inspection results, the reliability is improved and safer driving is performed. become. Furthermore, it is even more preferable if an abnormality in the periphery of the differential gear for transmitting the driving force can be detected. A first object of the present invention is to detect a change in lateral force of a vehicle body caused by traveling and an abnormality in a toe angle, a camber angle of a rear wheel, and an abnormality in a peripheral portion of a differential gear in accordance with an inspection of a speedometer and a brake. It is an object of the present invention to provide a composite vehicle inspection device that can be used. A second object of the present invention is to establish a specific means, that is, a standard inspection method having high objective legitimacy, for detecting an abnormality in the periphery of the differential gear of the automobile.

A third object of the present invention is to reduce the slight bulk in the vehicle width direction caused by incorporating the toe angle and camber angle measuring devices into a conventional vehicle inspection device, thereby achieving a space saving solution. The operation of the alignment tester board can be quickly switched between measurement and non-use by a short time operation, so that the work efficiency is not reduced, as compared with the case where the alignment tester board is moved forward and backward in the vehicle width direction only by the screw type adjuster. It is.

A fourth object of the present invention is to deal with the problem indication, the various judgment results and / or the various measured values so that they can be read instantaneously and easily.

A fifth object of the present invention is to secure a work space for the bottom surface and the periphery of the axle of a vehicle to be inspected and, upon finding a defect, without moving the vehicle to be inspected from the vehicle inspection apparatus without moving the inspected vehicle. An object of the present invention is to make it possible to quickly carry out necessary repair work on the bottom surface of the vehicle and the periphery of the axle.

The objects of the present invention are reconfirmed as follows.
2. Description of the Related Art In recent years, long-distance and high-speed traveling have been increasingly advanced due to development of motorization and improvement of a road network. Accordingly, high-performance tires having a special structure in which a rubber of a soft material is attached to the outer peripheral (ground) surface of the tire in order to improve the grip force are often used. When the tire has a poor ground contact balance with the road surface during high-speed running, an abnormal ground resistance is generated on the road surface. By doing so,
It may cause uneven wear of tires and deterioration of fuel efficiency. In addition, the heat generated by the abnormal grounding resistance causes heat damage to the bonding surface between the rubber of the tire body and the rubber on the outer periphery (grounding) surface of the tire. The rubber on the outer peripheral (ground) surface may peel off from the tire. Such a phenomenon causes a car accident during high-speed driving. Moreover, the phenomenon tends to increase, especially in the United States.

Since the above phenomenon tends to increase,
Assuming the situation from the present to the near future, preventing an increase in traffic accidents due to the above causes, improving fuel efficiency, and ecology (ecology that responds to biological and environmental destruction due to pollution)
The purpose of the present invention is to provide a vehicle inspection device for car maintenance that can meet the demands of the above. In particular, the dynamic lateral force measuring device for each wheel of a motor vehicle is unique in the world, and based on the dynamic lateral force measuring device, the technology is applied to a combined type vehicle inspection device having a further additional function. Disclose ideas and convenience.

[0017]

According to a first aspect of the present invention, a driving force is applied by a mounting table on which an inspection vehicle is mounted and mounted, and a roller in contact with wheels of the inspection vehicle. And a brake tester for checking the braking force based on the rotational state of the wheels, and an error of an indicated value of a speedometer attached to the test vehicle with respect to a true rotational speed at which the wheels contribute to traveling. Speedometer tester section, and the amount of movement of a roller movable in the axial direction by a lateral force generated in the axial direction along with the rotation of the wheel for measuring the amount of sideslip of the vehicle when passing through a specified distance. A toe angle and a camber angle measuring device and a vehicle measuring device having a roller type side slip tester which can be detected and measured by a link mechanism, First and second measuring means for independently measuring the rotational speed of the left and right two-wheel tires which are axially supported on a substantially coaxial line via gears, and the respective measurement results of the first and second measuring means. And a measurement result analysis means for detecting an abnormality in the peripheral portion of the differential gear of the automobile, and a result display means for displaying a judgment result of the measurement result analysis means for each result.

In this manner, the inspector can easily and inexpensively measure the toe angle and camber angle of the rear wheels and detect the abnormality around the differential gear of the automobile in addition to the inspection of the speedometer and the brake. In addition, there is no need to additionally install a dedicated mounting table for that purpose, and naturally there is no need for a dedicated installation place and no movement of the inspection vehicle is required.

According to a second aspect of the present invention, the measurement result analyzing means for detecting an abnormality in the peripheral portion of the differential gear of the automobile detects that the respective measurement results of the first and second measuring means are not equal. In addition, a result display means is provided for indicating that there is a problem in the peripheral portion of the bearing or the differential gear having the lower rotation speed. By doing so, a standard inspection method with high objective legitimacy for detecting an abnormality in the periphery of the automobile differential gear is established.

According to a third aspect of the present invention, there is provided an alignment tester plate which is positioned to face a rear wheel of an inspection vehicle from outside of the inspection vehicle and serves as a toe angle and camber angle measuring device, and an alignment tester therefor. The rotating shaft is supported on the panel, and the direction of the rotating shaft matches the width direction of the inspection vehicle,
When the toe angle is measured, the tester reference line, which is a straight line of a predetermined length, is made coincident with the traveling direction of the inspection vehicle. When the camber angle is measured, the tester reference line can be selectively rotated by 90 degrees and temporarily fixed so as to coincide with the vertical line. The first measurement value and the second measurement value are obtained by measuring the distance in the vehicle width direction from the rotating portion and the first measurement point and the second measurement point at both ends of the tester reference line to the side surface of the rear wheel. A distance difference sensor for measuring a dimensional difference from a measured value, a slide bed mounting mechanism provided so that the alignment tester board is movable in the vertical direction and the vehicle width direction and can be temporarily fixed at an arbitrary position, and A toe angle and camber angle measuring device including display means for displaying the inclination of the rear wheel with respect to the tester reference line based on the difference is incorporated.

With this arrangement, the inspector can apply the distance difference sensor for measuring the dimensional difference between the first and second measured values to the side surface of the rear wheel in a short time of only about 2 to 3 minutes. The toe angle and the camber angle of the rear wheel can be easily measured simply by reading the angle of the tilt, which is in contact with the tester reference line and indicating the tilt of the rear wheel.

Further, the invention according to claim 4 is provided with an electronic display panel for displaying the indication of the problem, various judgment results and / or the various measured values in a directly readable manner. By doing so, general customers other than those skilled in the art, that is, users of private cars with little knowledge of vehicle maintenance and experience, can also use the vehicle measuring device of the present invention and / or a composite vehicle inspection device (hereinafter, referred to as a combined vehicle inspection device). The state of the vehicle inspected by the “vehicle inspection device” can be clearly checked.

According to a fifth aspect of the present invention, there is provided an inspection system which is in a semi-underground and which can be submerged and / or has a scaffolding structure which can be entered and exited on the ground and which straddles the ditching and / or straddling the scaffolding structure. Work space was secured around the bottom of the vehicle and around the axle. With this configuration, as soon as a defect is found, the repair work required for the bottom surface and the periphery of the axle can be quickly performed without moving the inspected vehicle from the vehicle inspection device. .

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view in which an inspection vehicle Z is mounted on a hybrid vehicle inspection apparatus incorporating a toe angle and camber angle measuring device Y. FIG.
FIGS. 3A and 3B are a plan view (a) and a side view (b) of a composite type automobile inspection apparatus incorporating a toe angle and camber angle measuring device Y.

In FIGS. 1 and 2, a front wheel mounting portion 1 on which a front wheel FW is mounted has rollers 2 and 3 for applying a rotational driving force of a motor (not shown) to the front wheel FW, and a rotational speed detecting device associated therewith. A speedometer tester (not shown) for detecting an error of a speedometer mounted on the vehicle by a device or the like;
Or, while the third wheel is rotating the front wheel FW, the inspector or his assistant depresses the sudden brake from the driver's seat of the inspection vehicle and the front wheel F
A brake tester unit for detecting a change in the rotation state of W and inspecting the effect of a predetermined braking force is incorporated. In the case of a front-wheel drive vehicle, a rotational force may be applied to the front wheels FW by the engine of the inspection vehicle instead of the motor.

FIG. 2 (b) shows an open channel (pit-type working groove) which is located in a semi-underground and is free to be sunk. (Not shown), and a work space for the bottom surface of the vehicle to be inspected Z and the periphery of the axle may be secured. Furthermore, even if it is a structure provided with a "slope-type taxiway" or a "lift-type lift" for mounting the vehicle to be inspected on the tower structure so as to straddle the inspected vehicle Z, a "hanging-type elevator", etc. Any of a plurality of automotive measuring instruments and / or a composite type vehicle inspection device that is an aggregation thereof may be considered to be included in the present invention.

The rear wheel mounting portion 4 has a rear wheel RW mounted thereon.
Regarding the inspection of the effect of the braking force, it can perform substantially the same function as the front wheel mounting portion 1. Note that the bottom of the rear wheel mounting portion 4 is supported by an iron wheel 5 so that the operation of adjusting the front and rear on the rail 6 can be freely performed so as to correspond to a different wheelbase for each vehicle type. The rear wheel mounting portion 4 can be located directly below the rear wheel RW. Therefore, the rear wheel RW is connected to the test drum 2
3. Make contact evenly and correctly on 3A and 23B. In addition, similarly to the front wheel mounting section 1, a speedometer tester section (partly not shown)
Then, an error is detected between the true running speed urged by the test drum 23A or 23B and the indicated value indicated by a vehicle speedometer attached to the vehicle.

When the speedometer tester is used, the engine driving force of the inspection vehicle itself may be used, and the operation of the speedometer is related only to the front wheels FW and the rear wheels R
W is irrelevant for many types of vehicles, and will be dealt with appropriately. or,
In the brake tester section (partly not shown), the rear wheel R together with the test drum 23A or 23B is similar to the front wheel mounting section 1.
While the W is rotating, the inspector or his assistant from the driver's seat of the inspection vehicle steps on the sudden brake to detect a change in the rotation state of the rear wheel RW, and checks whether or not a predetermined braking force is effective.

Further, by the side slip tester section,
The measurement of the amount of side slip of the vehicle when passing through the specified distance, that is, the lateral force, is simulated by a stationary vehicle except for the wheels whose lateral force is to be measured. To measure the lateral force, the side slip test drums 24A and 24B can freely slide in the axial direction and can measure the sliding amount corresponding to the lateral force generated in the axial direction with the rotation of the rear wheel RW. And a composite vehicle inspection device provided with the roller-type side slip tester is a parent body of the present invention.

On the side of the composite type vehicle inspection device provided with the roller type side slip tester serving as the base, the following devices are additionally provided detachably by bolting. FIG.
5 are toe angle and camber angle measuring instruments, FIG. 3 is a perspective view, FIG. 4 is a plan view of a main part, FIG. 5 (a) is a perspective view of a main part at the time of toe angle measurement, and FIG. FIG. 5 is a perspective view of a main part at the time of measuring the camber angle, and FIG. 5C is a diagram in which the distance difference sensor is folded when the toe angle and the camber angle are not measured.

The toe angle and camber angle measuring device Y has an alignment tester board 7 in which the rear wheel RW of the inspection vehicle Z is positioned so that the distance difference sensor 13 faces the outside of the inspection vehicle Z. The alignment tester board 7 has a rotating part 12 rotatable by 90 degrees, and the direction of the rotating shaft 14 of the rotating part 12 matches the vehicle width direction R of the inspection vehicle Z. The rotating portion 12 is temporarily fixed by a spring clip mechanism S at the point where the rotation is completed. Then, there are a first measurement point J and a second measurement point K at both ends of a tester reference line TD having a diameter on the rotating part 12. In addition, the inspector can use the distance difference sensor 13 on the rotating unit 12.
, The distance in the vehicle width direction R from the first and second measurement points J and K to the side surface of the rear wheel RW is measured, and the first measurement value and the second measurement value are obtained, respectively. And the dimensional difference TS between the measured value and the second measured value can be detected. However, in the present embodiment, the first measurement value is used as a reference.

The slide bet mount mechanism 11 has a rear wheel R
The alignment tester board 7 is movable in the vertical direction and the vehicle width direction R and can be temporarily fixed at an arbitrary position such that the tip 13a of the distance difference sensor 13 contacts the side surface of the W. The toe angle and camber angle measuring device Y provided with the slide bed mount mechanism 11 is detachably mounted on the side E of the rear wheel mounting portion 4 by bolting with a bolt 10 or the like.

When the toe angle and the camber angle measurement device Y measure the toe angle, the tester reference line TD connecting the first and second measurement points J and K is made horizontal so as to coincide with the traveling direction of the inspection vehicle Z. When measuring the camber angle, the tester reference line T
Rotating part 12 is selectively 9 so that D coincides with the vertical line.
0 degree, and the rear wheel R with respect to the tester reference line TD is determined by the inverse tangent trigonometric function of the dimension difference TS with respect to the tester reference line TD.
The measured value is obtained by displaying the inclination angle X degrees of W.

The rotating section 12 may be a long plate-like member or a rod-like member including a tester reference line TD including the first and second measurement points J and K as shown in the figure, or not shown. It may be a disk-shaped member. A rod 16 of a specified length and a distance difference sensor 13 are provided at the first and second measurement points J and K on the rotating portion 12 so as to be foldable by hinges 15 respectively, and stand in the vehicle width direction R when used. There is a spring-made clip mechanism (not shown) for temporary fixing, and when not in use, the structure is such that the alignment tester board 7 is folded along the board surface or the longitudinal direction.

By doing so, the inspector can measure the toe angle and the camber angle of the rear wheel RW for only 2 minutes to 3 minutes.
Minutes, and during legal inspections other than the toe angle and camber angle measurements, ie, while the vehicle speedometer and brake inspection are performed by the same vehicle inspection device, a rod 16 of a specified length is used.
Since the distance difference sensor 13 is not used, the folding is performed along the board surface of the alignment tester board 7 or the longitudinal direction of the rotating section 12. By doing so, the efficiency is high without hindering the rotation of the rear wheel RW for the brake inspection or the like of the rear wheel RW or the work of taking the inspection vehicle in and out.

Also, by incorporating the toe angle and camber angle measuring device Y, the bulkiness in the vehicle width direction R, which is generated by incorporating the toe angle and camber angle measuring device Y, is reduced to save space, and the alignment tester board 7 is screwed with the screw adjuster 8. Rather than performing the forward / backward movement in the vehicle width direction R only by performing the operation in a short time, the switching between the measurement and the non-use can be performed quickly, so that the working efficiency can be prevented from lowering.

Further, the alignment tester board 7 has a first contact 16a at the tip of a rod 16 of a specified length which is in a state of standing in the vehicle width direction R from the first measurement point J, and a second measurement is performed. At the point K, there is a distance difference sensor 13 which has a sliding scale 13b which slides along the vehicle width direction R and obtains a second measured value TS. In order for the inspector to measure the toe angle and the camber angle using the toe angle and camber angle measuring device Y, the first contact 16a
Is set as a reference point at a point where it abuts on the same side surface of the rear wheel RW, and the second contact 13a forming the tip of the sliding scale 13b is connected to the rear wheel R
The sliding amount TS itself that the sliding scale 13b has slid by contacting the side surface of the W is detected as a dimensional difference TS. Therefore, only one sliding scale 13b consisting of precision parts is required instead of two.

The distance difference sensor 13 detects the sliding amount TS.
There is an encoder (not shown) that converts into an electric signal.
The dimensional difference TS represented by the electric signal and the tester reference line T
The calculation of the arc tangent trigonometric function based on the relationship with D is performed by the electrical counter display 19, and the tilt angle X degrees described later with reference to FIG. 6 is calculated and displayed so as to be directly readable. The degree is read by the inspector as a measure of toe angle or camber angle.

As will be described later with reference to FIGS. 6 and 7, the calculation of the trigonometric function is approximated by an arc tangent or arc sine at a small angle of about 1 degree or less. There is no practical problem. Further, the structure of the alignment tester board 7 can be changed in any way for design reasons, and the distance difference sensor 13 is temporarily fixed on the rotating part 12 in a state of standing in the vehicle width direction R. The present invention is not limited to a spring-made clip mechanism (not shown) or a structure in which the existing slide scale 13b is protruded in a bar shape. For example, two points corresponding to the first contact 16a and the first contact 13a are used. A structure (not shown) may be adopted in which the entire contact surface including the flat surface is evenly brought into close contact with the side surface of the rear wheel RW by point contact instead of point contact.

In this manner, the inspector can bring the first contact 16a and the second contact 13a into contact with the side surface of the rear wheel RW in a short time of only about 2 to 3 minutes, and the inclination thereof can be reduced. The toe angle and camber angle of the rear wheel RW can be easily measured by reading the easy-to-read numeric display of the electrical counter display 19 for the angle X degrees.

Further, a printer 18 for printing the measured values displayed by the angle display means constituted by the electric counter display 19, inspection specifications and other records may be provided. In this way, the inspector can reduce the burden of recording the inspection results and the like during busy work, and the service effect can be improved by handing the recording paper printed by the printer 18 to the user.

Here, the principle of toe angle measurement using a conventional toe gauge or alignment tester will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a plan view showing how toe angles are measured by the toe gauge and the alignment tester on the same drawing. In FIG. 6, after the narrow width NL of the mark A is measured by the toe gauge 51a, the inspection vehicle is manually pushed (if not mounted on the mounting table 52), and the rear wheel RW.
Is rotated half a turn, and the wide width WL of the mark B is moved to the toe gauge 51b.
If the width difference GS (not shown) between the wide width WL and the narrow width NL is obtained in the unit of millimeter, it alone becomes a standard for inspection and maintenance. For example, it conforms to the standard specification of the initial setting toe-in of 4 mm and passes the inspection.

As a measuring method using an alignment tester, sliding and arbitrary locking in the traveling direction and a vertical direction (not shown) on a rail 53 provided on the side of the mounting table 52 in FIG. The alignment tester 54 is set so as to be freely movable, faces the center of the rotation axis of the rear wheel RW as a target, and is indicated by one side of a conceptual triangle which is a reproduction of the toe angle of the rear wheel RW drawn in the drawing. If the distance corresponding to the dimensional difference TS is measured by a predetermined means, the relationship with the diameter TD of the tester reference line is calculated by an arctangent function, and the inclination angle X degrees is obtained as a measured toe angle value. In the case of camber angle measurement,
Although not shown, the mark A point and the mark B point are set in the vertical direction by the same geometric mathematical concept as the toe angle measurement,
Obtain the tilt angle with respect to the true vertical direction. As a result, for example, it conforms to the standard specification of the initial setting camber angle minus 0 degrees 40 minutes, and notifies the user that the inspection has passed.

FIG. 7 is a table showing toe angles and respective dimensions when the wheel diameter is 600 mm. As can be understood from reading this table, the following two points are known when the angle is small enough to be a problem in the measurement of the toe angle and the camber angle. The first point is that the calculated values of the arc sine and arc tangent functions are almost similar, and any calculation results need to be distinguished and effective. Second, since the width difference GS and the inclination angle X are substantially directly proportional to each other, it is not always necessary to convert the inclination angle X into a frequency and display it in practice of car maintenance. That is, the commonly known toe angle is expressed in millimeters of the width difference GS, which is approximately 4 m.
If it is set to m, ordinary passenger cars are considered to be good. Therefore, the frequency display of the tilt angle X may be calculated as needed. In addition, there are standard specifications of toe angle and camber angle which differ for each vehicle type, and from a computer database or the like stored in advance, the individual specification items of vehicle verification, for example, the standard specification and various specification values, etc., according to the vehicle type and body number, etc. It is appropriate to search and submit to inspection and maintenance related to vehicle inspection.

As a background for exhibiting the effectiveness of the present invention, the alignment tester 54 is usually not provided in a general private vehicle inspection and maintenance shop, and is exclusively used for an automobile manufacturer or a large specialty store of automobile tires. Although it is provided as a measuring instrument, the burden of measurement costs and the like by such a rare dedicated measuring instrument was not easy.

As one problem or another problem, recently, the overall quality performance including the durability of each part of the automobile has been improved, and the legal inspection items are reduced with the revision of the Road Transport Vehicle Law. It is also acceptable to take the inspection and maintenance after the pre-vehicle inspection in the vehicle inspection, etc., that is, to have the vehicle inspected before the regular inspection and maintenance, and if there is a slight defect, repair it after the vehicle inspection and pass the vehicle inspection. It was way.

As can be seen from the above, as long as the inspection vehicle is not heavily used or the security parts etc. are not clearly damaged by an accident, many vehicles can pass the vehicle inspection without any special inspection and maintenance. Has become. There is also a strong demand for deregulation of the legally enforced vehicle inspection system itself. Against this background, car inspection is a service that minimizes the burden on vehicle owners and users as well as finds defects that are often overlooked by users. Under these circumstances, the present applicant has invented and disclosed a multi-functional and easy-to-use combined type vehicle inspection apparatus.

FIG. 8 is a plan view showing a speedometer and a side slip inspection device in a composite type vehicle inspection device.
Applicable to W and rear wheel RW. The speedometer test drums 23A and 23B constitute the speedometer tester and fulfill its purpose. Further, the lateral force of the wheel mounted on the side slip test drums 24A, 24B is detected based on the movement amount of the side slip test drums 24A, 24B.
The speedometer test drums 23A and 23B are shown in different shapes in FIG. 1, FIG. 2, and FIG. Each is an embodiment of the present invention.

FIG. 9 is a partial longitudinal sectional side view of FIG.
(B) The form being measured. For example, the rear wheel RW is mounted on the speedometer test drums 23A and 23B, and the cylinder 33 is provided with a rotational force corresponding to a predetermined traveling.
Is excited, and the side slip test drums 24A and 24B
Is brought into contact with the rear wheel RW with a predetermined pressing force, and the rear wheel RW is rotated by obtaining a rotational force. The lateral force, that is, the side slip can also be measured in the same manner on the front wheel FW. When the wheel to be inspected does not have the driving force of the engine, it is sufficient to apply the rotational force by the motor provided in the vehicle inspection device.

FIG. 10 is a partially cutaway view showing the manner in which the drum and the square shaft, which are the main parts of the side slip inspection device, are connected. The square shaft 25 is rotatably supported on the rear wheel mounting portion 4 by a shaft 25a. The side slip test drums 24A and 24B are supported on the square shaft 25 so as to be movable in the axial direction. The movable structure is such that a roller 28 rotatably supported by a shaft 17 on a U-shaped metal fitting 26 implanted on the inner wall of the tube of the side slip test drums 24A and 24B has a square plane of the square cross section of the square shaft 25. Four points are supported.

With this, the inspection vehicle is mounted on the mounting table of the vehicle inspection device, and the amount of side slip of the vehicle when the inspection vehicle passes within the specified distance is simulated while the vehicle body other than the wheels is kept stationary. In order to measure the distance, the movement amount of the side slip test drums 24A and 24B that can move in the axial direction by the lateral force generated in the axial direction due to the rotation of the wheel, as shown in FIG. The movement amount is detected by the angle detection device 21 via 'and 20 ”, converted into an electric signal by an encoder (not shown), and displayed on the tester 22.

FIG. 11 is an explanatory view of a measuring means for detecting an abnormality around the differential gear of an automobile. In FIG. 11, the inside of an automobile differential gear (hereinafter also referred to as “differential gear”) 30 has a structure composed of a combination of well-known bevel gears and the like. Is transmitted to the left and right tires W1 and W2 via the driving force transmission shaft 32, and meshes with the bevel gears 30a and 30b of the differential gear 30 by an amount corresponding to the rotation in the opposite direction on the coaxial 30c. Since the bevel gears 30d and 30e are allowed to rotate unequally on the left and right sides, the bevel gears 30d and 30e exhibit the function of absorbing the differential rotation of the left and right shafts 33 and 34. This is a driving force transmission gear device capable of transmitting driving force while providing a driving force.

During the turning operation with the minimum radius of the vehicle, there is an advantage that the desired turning can be achieved while the left and right shafts 33 and 34 are reversed in the forward and backward directions, respectively. However, if the tire W1 on one side is caught in mud and the normal frictional force with the road surface cannot be secured, only the tire W1 idles, while the tire W2 on the other side remains stationary and the driving force is reduced. There is also an adverse effect of the differential gear 30 that transmission cannot be performed. In that case, if the idling of the tire W1 is restricted by the combined use of the hand brake, the driving force can be transmitted to the tire W2 on the opposite side, and the mud can escape. This is because the rotation of the bevel gears 30a and 30b of the differential gear 30 is restricted, and the rotation of the left and right shafts 33 and 34 is prevented from absorbing the differential rotation.

Here, if the vehicle which is not actually inspected but is actually running is turning to the left or right, or is running on a rough road, an appropriate difference is provided between the rotational speeds of the left and right shafts 33 and 34. In addition, the tires W1 and W2 on the left and right are respectively at an actual relative speed with respect to the ground surface, that is, both the tire and the road surface are relatively opposed to each other, so that there is little occurrence of unreasonable slip and smooth running can be maintained.

However, if the car is traveling straight on a perfect plane, the left and right tires W1, W2 and the left and right axles 33, 34
Are the same rotational speed, so that their rotational speed difference is naturally zero. That is, the driving force transmission balance of the differential gear 30 is balanced and normal.

Ideally, the axial friction between the left and right shafts 33 and 34 is preferably zero, but the left and right shafts 33 and 3 are not required.
The shaft friction is determined by the performance and the degree of deterioration of the bearings (not shown) of the bearings 35 and 36 and the differential gear 30 that independently support the bearings 4 and the maintenance state of the lubricating oil. This shaft friction is not a problem if it is expected at the time of design and within an allowable range. However, if the shaft friction exceeds the allowable range for some reason, a so-called "burn-in" phenomenon is exhibited, resulting in a serious failure. or,
Even if "burn-in" does not occur, an extra driving force is required due to a "dragging" phenomenon in which shaft friction increases, which leads to waste of fuel. If an imbalance occurs in the axial friction between the left and right shafts 33 and 34, a problem such as uneven wear of the left and right tires occurs even when the vehicle runs straight on a flat road.

Therefore, it is desirable to quickly detect an increase in shaft friction exceeding the allowable range. Generally, the left and right shafts 33 and 34 should be degraded at the same time by the same degree, respectively.
Since the friction of one of the shafts sharply increases, if the occurrence of only one side abnormality can be detected, the effect of the maintenance and inspection is improved. Therefore, in the present embodiment, the rotation speeds of the left and right tires W1 and W2 are independently measured by the first and second measurement units 37 and 38, respectively. At this time, the rotational driving force to the left and right tires W1 and W2 virtually realizes a state in which the vehicle is normally running via the engine 31, the driving force transmission shaft 32, and the differential gear 30. As described above with reference to FIGS. 1 and 2, the front wheel FW is attached to the rollers 2 and 3 and the rear wheel R
Since W is placed on the test drums 23A and 23B so as to be in contact with the test drums 23A and 23B evenly, the inspected vehicle Z virtually realizes rotating wheels in a state where the vehicle is traveling normally in a substantially stationary state. Can be

At this time, the running resistance to the left and right tires W1 and W2 does not have to be loaded. Rather, it is easier to find an abnormality at a stage where the imbalance of shaft friction is small when the vehicle is idling without applying a load. When there is actually an abnormality in the shaft friction, and this is detected as a speed difference between the first and second measuring means 37 and 38, for example, the left and right tires W1 and W2 are
In the case of idling at a speed equivalent to Km / h, the difference between the left and right idling speeds is 4 Km / h or more, that is, "if an imbalance of 10% or more is detected, the imbalance corresponds to the cause of the failure." Inspection criteria are provided, and this is measured
Is determined.

The measurement result analysis means 39 is designed by an electronic circuit or the like so as to always maintain the reproducibility under the same conditions while maintaining the objective justification of the inspection standard.
A detailed description of a tachometer using these known electromagnetic elements or the like and automatic calculation means for detecting a difference is omitted. As the result display means 40 for displaying the inspection result of “corresponding to the cause of failure” for each result, the light-emitting display panel 41 uses a translucent display such as “Pass”, “Fail”, “O” or “X”. It is better if the caption plate is clearly lit by controlling the lighting from the back, and it is more preferable to print it on the inspection result recording paper. Furthermore, not only the final conclusions such as “Pass”, “Fail”, “O”, “X”, etc., but also numerical display of various measured values on the electronic counter display 19 ′ is effective for management, and the records are recorded. Printer 18 'to print
May be provided.

In addition, it is easy to perform a repair with the inspection vehicle Z, which has been notified of the failure, in a state where the inspection vehicle is mounted on the pit (semi-underground) type apparatus, while the inspection vehicle Z is being repaired. In particular, there is the purpose of this device. For example, the degree of deterioration of the bearings of the bearings 35 and 36 and the differential gear 30 and the maintenance state of the lubricating oil are checked, and as soon as the cause can be identified, the measures are taken.

In order to restore and maintain the normal state, maintenance of lubricating oil (hereinafter also referred to as "differential oil") for the differential gear 30 is an essential requirement. Without changing the entire amount of the differential oil, iron bevel gear 3
If the increase in friction due to tying of 0a, 30b, 30d, 30e, etc. is the cause of the abnormality, by eliminating the tying of the irons, there is an effect of making the irons slippery and reducing mutual friction. There is also maintenance to add molybdenum additives to differential oil.

In the case of such repair and maintenance, the deterioration of the related parts has already progressed after the abnormal phenomenon has been discovered, and if the repair and maintenance are carried out alone, a considerable amount of equipment, time, and a predetermined amount of time required by a professional are required. Although it is inevitable to collect technical labor, etc., the inspection and maintenance will be completed only by adding a small fee to the fee for vehicle inspection only, so that the inspection and maintenance will be completed in addition to the legal inspection. It is also convenient for the customer, that is, the general user of the private car.

Here, the inspection function for detecting an abnormality in the peripheral portion of the differential gear according to the present invention and the composite vehicle inspection device incorporating the toe angle and camber angle measuring devices are provided for recent passenger cars.
The reasons why it is increasingly necessary and effective are: 1) Due to the suspension of the four-wheel suspension, each wheel is directed independently in a self-directed direction due to climbing on a curb, running on a rough road, and the like, resulting in a misalignment. 2) The weight was reduced for the purpose of improving fuel efficiency, and the chassis structure was replaced with a monocoque body. The rigidity of the vehicle with the chassis structure was low, so that the alignment of both the front and rear wheels was easily misaligned. That is, it is easy to cause imbalance when the lateral force of each wheel is out of order. 3) In recent years, technological innovation of underbody mechanisms has been advanced by automakers, and the number of vehicles that cannot be dealt with by conventional maintenance techniques, such as 4WB and 4WD, has increased. Further, a rear wheel lateral force adjustment mechanism, that is, a rear wheel alignment adjustment mechanism has been developed. The number of equipped vehicles may increase to at least 80% or more of all types of passenger cars, and may require adjustment. 4) In the case of a front wheel drive vehicle, since the front wheels run while pulling the rear wheels, the misalignment of the rear wheels greatly affects high-speed stability. Therefore, adjustment of the lateral force of the tire over all four wheels, that is, an all-wheel alignment adjustment mechanism is indispensable. 5) Current automobiles use many rubber parts to reduce the impact from the road surface and improve ride comfort. However, these rubber parts are deformed and worn due to aging, resulting in misalignment. In addition, alignment may change due to familiarity within a few months from the purchase of a new car. 6) If the toe angle and the camber angle are out of order, the tires wear unevenly. 7) When a four-wheel driver with a full load is running at high speeds, a study of the causal relationship in which the deviation of the toe angle has some adverse effect on the steering wheel operation and leads to serious accidents such as head-on collisions. (Unpublished in writing for confidential research). 8) In order to improve the grip between the road surface and the tire, and to maintain the rigidity and elasticity of the tire main body, use a rubber of a material having high rigidity and elasticity for the tire main body. There is also a new type of tire with good soft rubber attached.However, imbalance in the transmission of differential gear driving force and toe angle cause abnormal heating of the tire. The possibility of causing a peeling phenomenon in the part that has been removed is being elucidated. It also includes a problem that cannot be determined as a tire-only defect. 9) With the sophistication and sophistication of vehicles, there are many users who demand running stability and running stability performance to achieve it.

For the above reasons, it is necessary and effective to perform an inspection for detecting an abnormality in the peripheral portion of the differential gear and to measure the toe angle and the camber angle. For example, a dedicated measuring device for measuring the toe angle and the camber angle is required. Some alignment testers cost about 10 million yen or more, the measurement time is about 1 hour or more, and the cost is about 20,000 yen just for measurement. Further, if the inspection for detecting the abnormality in the peripheral portion of the differential gear is performed alone, the cost of the disassembly inspection of the corresponding portion is incurred. However, the usual inspection is about 15 per vehicle.
Minutes, it is necessary and effective to measure toe and camber angles and to detect abnormalities around the differential gear, which is not in line with commerciality at general car repair shops and private car inspection stations. At present, it is impossible to implement even if you know something.

What responded well to the above-mentioned current situation is the inspection function of the present invention for detecting an abnormality in the peripheral portion of the differential gear, and a composite type vehicle inspection device incorporating a toe angle and camber angle measurement device. To operate effectively. 1) Carry out regular legal inspections. 2) Toe angle and camber angle measurements are performed in 2 to 3 minutes. 3) The lateral force is measured in a few minutes using a roller type side slip tester. 4) The previously measured values of the toe angle, camber angle, and lateral force, which are unique to the inspection vehicle, are compared with the values measured in the above, and the result is judged as pass / fail to confirm whether adjustment is necessary. 5) If it is necessary to adjust the toe angle or the camber angle, the composite inspection system of the present invention has a pit structure, that is, a semi-underground groove. Perform the adjustment work in 20 minutes. 6) Inspection to detect abnormalities around the differential gear takes 2 to 3 minutes.
Perform in minutes. 7) If an abnormality in the periphery of the differential gear is found, an inspection / maintenance worker dives into the semi-underground groove to perform repair and maintenance work in a short time.

The inspection for detecting the abnormality in the peripheral portion of the differential gear and the measurement and adjustment of the toe angle and the camber angle in the manner described above are performed after the normal legal vehicle inspection. Since there is no need to move the inspection vehicle from the device or place, the burden on the user in terms of cost and time is not excessively increased. Therefore, general car maintenance factories and private car inspection stations are also in line with their commercial nature, so that they can be widely spread in the modern automobile society and contribute to traffic safety.

[0067]

As described above, according to the present invention,
The following effects are obtained. First, according to the first aspect of the present invention, the inspector can easily and quickly measure the toe angle and camber angle of the rear wheels and detect the abnormality around the differential gear of the automobile after the inspection of the speedometer and the brake. It can be executed at low cost, and there is no need to additionally install a dedicated mounting table for that purpose. Naturally, there is no need for a dedicated installation place, and there is no need to move the inspection vehicle.

Further, according to the second aspect of the present invention, a standard inspection method with high objective legitimacy for detecting an abnormality around the differential gear of the automobile is established.

According to the third aspect of the present invention, the inspector can use the distance difference sensor for measuring the dimensional difference between the first and second measured values in a short time of only about 2 to 3 minutes. The toe angle and the camber angle of the rear wheel can be easily measured simply by reading the angle of the tilt that contacts the side surface of the wheel and indicates the tilt of the rear wheel with respect to the tester reference line.

According to the fourth aspect of the present invention, even a general customer other than those skilled in the art, that is, a user of a private vehicle having little knowledge and experience of vehicle maintenance, can at a glance understand the state of the vehicle inspected by the vehicle inspection device. You can check.

According to the fifth aspect of the present invention, as soon as a defect is found, the vehicle to be inspected needs to be moved to the bottom surface and the periphery of the axle without moving from the vehicle inspection device. Repair work can be performed quickly.

As described above, with the combined vehicle inspection system, the differential gear which is desired to be arbitrarily selected by the user regardless of whether or not the vehicle belongs to the legal inspection and maintenance item at the time of vehicle inspection and maintenance is desired. Inspection for detecting abnormalities in the peripheral area, and toe angle and camber angle measurement can be performed in a short time of only about 2 to 3 minutes. Inspection / maintenance workers can sneak into the working groove, or repair and maintenance work can be performed in a short time on the bottom surface and axle periphery of the vehicle to be inspected, which straddles the ground structure that is freely accessible on the ground.

Further, the present invention provides a composite vehicle inspection device that covers most of the conventional legal inspection and maintenance items with one unit. Therefore, it is not necessary to move an extra place or a vehicle for inspection and repair and maintenance work, so that an effective inspection can be performed without much increase in cost, which contributes to elimination of a traffic accident.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, in which an inspection vehicle is mounted on a composite automobile inspection apparatus incorporating a toe angle and camber angle measuring device.

2A and 2B are a plan view and a side view, respectively, of a hybrid vehicle inspection apparatus incorporating a toe angle and camber angle measuring device, showing an embodiment of the present invention.

FIG. 3 shows an embodiment of the present invention and is a perspective view of a toe angle and camber angle measuring device.

FIG. 4 is a plan view of a main part of FIG.

FIG. 5A is a perspective view of a main part at the time of measuring the toe angle in FIG. 3; FIG. 4B is a perspective view of a main part when the camber angle is measured in FIG. FIG. 4C is a view in which the distance difference sensor is folded when the toe angle and the camber angle are not measured in FIG.

FIG. 6 is a plan view showing how toe angle is measured by a toe gauge and an alignment tester on the same drawing in order to explain the principle.

FIG. 7 is a table showing toe angles and respective dimensions when a wheel diameter is 600 mm.

FIG. 8 is a plan view showing a speedometer and a side slip inspection device in the hybrid vehicle inspection device.

FIG. 9 is a partially longitudinal side view of FIG. 8, showing (a) a form in which a side slip is not measured and (b) a form in which a side slip is being measured.

FIG. 10 is a partially cutaway view showing a connection between a drum and a square shaft, which is a main part of a roller-type side slip inspection device in a composite type automobile inspection device.

FIG. 11 is an explanatory view of a measuring means for detecting an abnormality in a peripheral portion of an automobile differential gear.

[Explanation of symbols]

 2, 3 Roller 7 Alignment Tester Board 11 Slide Bet Mount Mechanism 12 Rotating Part 13 Distance Difference Sensor 13a Second Contact 13b Sliding Scale 14 Rotation Axis of Alignment Tester Board 7 Hinges 16 Bar of Specified Length 16a First Contact 17 axis 18, 18 'printer 19, 19' electric counting display 20, 20 ', 20 "link 21 angle detector 22 tester 25 angular shaft 30 automobile differential gear 30a, 30b, 30d, 30e bevel gear 30c Coaxial 31 Engine 32 Propulsion transmitting shaft 33,34 Axle 35,36 Bearing 37,38 First and second measuring means 39 Measurement result analyzing means 40 Result display means 52 Mounting table E Side J First measuring point K Measurement point 2 R Vehicle width direction RW Rear wheel TD Tester reference line TS Dimension difference W1, W2 Tire X Tilt Meter Z test vehicle Y toe angle and camber angle

Claims (5)

[Claims] 1. A mounting table on which an inspection vehicle is mounted and mounted, and a brake tester section for urging a driving force by a roller in contact with a wheel of the inspection vehicle and inspecting a braking force based on a rotation state of the wheel. A speedometer tester unit for inspecting an error of an indicated value of a speedometer attached to the inspection vehicle with respect to a true rotation speed at which the wheels contribute to traveling, and a vehicle skidding amount when passing within a specified distance. Vehicle measurement equipped with a roller-type side-slip tester capable of detecting and measuring the amount of movement of a roller that can move in the axial direction by a link mechanism due to a lateral force generated in the axial direction with the rotation of the wheel for measurement In a device and / or a combined type vehicle inspection device obtained by assembling them, a toe angle and a camber angle measuring device, and rotational speeds of right and left two-wheel tires which are axially supported on a substantially coaxial line via an automobile differential gear. First and second measuring means for independent measurement on the left and right, and a measurement result analyzing means for detecting an abnormality around the differential gear of the vehicle, based on the measurement results of the first and second measuring means, An automobile measuring instrument and / or a composite type vehicle inspection apparatus comprising the same, comprising a result display means for displaying a judgment result of the measurement result analyzing means for each result. 2. A measurement result analyzing means for detecting an abnormality in a peripheral portion of the differential gear of the automobile detects that the respective measurement results of the first and second measuring means are not equal, and determines whether the rotation speed is lower. 2. The vehicle inspection device according to claim 1, further comprising a result display unit for indicating that there is a defect in a bearing or a peripheral portion of the differential gear. 3. An alignment tester plate which is positioned to face a rear wheel of the inspection vehicle from outside of the inspection vehicle and forms a toe angle and a camber angle measuring device, and a rotary shaft is supported by the alignment tester plate. The direction of the rotation axis coincides with the vehicle width direction of the inspection vehicle, the tester reference line, which is a straight line of a predetermined length, matches the traveling direction of the inspection vehicle when measuring the toe angle, and the tester reference line coincides with the vertical line when measuring the camber angle. And a rotating portion that can be selectively rotated by 90 degrees and temporarily fixed so as to coincide with the vehicle, and a vehicle width direction from a first measurement point and a second measurement point at both ends of the tester reference line to the side surface of the rear wheel. And a distance difference sensor for measuring a dimensional difference between the first measurement value and the second measurement value, and the alignment tester board is movable in the vertical direction and the vehicle width direction at arbitrary positions. A toe angle and camber angle measuring device including a slide bed mounting mechanism provided so as to be temporarily fixable and display means for displaying an inclination of the rear wheel with respect to the tester reference line based on the dimensional difference is incorporated. The measuring instrument for vehicles according to claim 1 or 2, and / or a combined vehicle inspection device in which the measuring devices are assembled. 4. The method according to claim 4, wherein the indication of the defect, various judgment results, and / or
4. The vehicle measuring instrument according to claim 1, further comprising: an electronic display panel that displays the various measured values so as to be directly readable. 5. Vehicle inspection equipment. 5. A work on a bottom surface and a periphery of an axle of a vehicle to be inspected which is in a semi-underground and has an open channel which can be sunk and / or which is on the ground and which can enter and exit, and has a scaffold structure. The vehicle measuring instrument according to any one of claims 1 to 4, wherein a space is secured, and / or a composite vehicle inspection apparatus in which the measuring instrument is assembled.