JPH05256736A - Vibration detecting apparatus for vehicle - Google Patents

Abstract

PURPOSE:To make it possible to detect the vibration of a vehicle caused by unbalance of tires accurately by constituting an apparatus of a plurality of driving motors, vibration detecting members and vibration transmitting roller, respectively, and rotating four wheels individually or at the same time. CONSTITUTION:Front wheels 12 and rear wheels 13 of a vehicle (especially a four-wheel driving vehicle) 7 are mounted on vibration transmitting rollers 8. The vehicle 7 is supported with a holding means 11 for fixing the vehicle. Driving motors 3 can be driven individually or at the same time. When each motor 3 is driven, the driving force is transmitted to each roller 8 through a power transmission means 10. The front wheels 12 and the rear wheels 13 are independently rotated by the rotations of the rollers 8, and the state close to the actual running is reproduced. The abnormal vibration, which is generated in the rotation of the front wheel 12/rear wheel 13, is transmitted into each vibration detecting member 5 through each roller 8. The vibration of the front wheel 12/rear wheel 13, which is detected with each detecting member 5, is sent into a CPU 15 as the vibration signal (frequency), and the shaking and the shimmy of the vehicle 7 can be analyzed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle vibration detection device for detecting shake or shimmy vibrations that occur when a vehicle travels on a general highway at a constant speed or at an accelerated or decelerated speed in a state close to actual travel.

[0002]

2. Description of the Related Art There are various types of vibrations that a vehicle occupant receives. These can be roughly classified into those that are caused by a power transmission system such as engine torque fluctuations and unbalance of a rotating body, and those that are caused by rotation of tires and the like. In general, the former is distinguished from high-frequency vibrations and the latter from vibrations relating to the field of riding comfort.

When the latter concept of vibration is further divided into two, the vibration of the engine and the mounting system and the vibration of the vehicle body caused by the bending of the vehicle body are caused by the unbalance of the tire and the primary component of uniformity as the vibration force. (So-called vertical vibration: shake) and vibration in the steering wheel rotation direction (so-called vibration in the rotation direction: shimmy) that occurs due to imbalance and uniformity of the front tires.

Conventionally, however, in the case of detecting a shake or shimmy of a vehicle in a state close to actual driving, a specially trained inspector makes an artificial decision and puts the vehicle on a pair of rollers. At the same time, there is a method in which a vibration detector is fixedly attached to a part of the steering wheel of the vehicle and a vibration signal of the steering wheel caused by an unbalance force of the tire is detected.

However, in the case of the former, since it depends on the human senses, accurate and stable evaluation cannot be expected depending on the physical condition of the inspector, while in the case of the latter, the steering wheel is used each time. Since a vibration detector must be attached, it is inefficient in this type of detection device that must be inspected in a line work, and since the handle has a soft skin other than the core material, Part of the vibration is absorbed, and it is difficult to clarify the mechanism of vibration, etc. Furthermore, by attaching a vibration detector to the steering wheel, it may be scratched and damage the product car. There was a drawback.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention can accurately detect the vibration of the vehicle due to the unbalance force of the tire, and particularly in a four-wheel drive vehicle. A vehicle vibration detection device capable of discriminating the contribution of each wheel to shimmy and shake by rotating four wheels simultaneously or individually and improving the work efficiency in the inspection line. Is to get.

[0007]

SUMMARY OF THE INVENTION A vehicle vibration detecting device of the present invention comprises a pit formed on a floor surface, a plurality of motor support bases installed in the pit, and the motor support bases respectively. A plurality of drive motors provided, on the other hand, a plurality of sensor supports installed separately from the motor support in the pit, a support for these sensors, and a support for the sensors A plurality of vibration detecting members that are sandwiched between a plurality of roller support plates that are respectively provided above the roller support plates, and that are provided on the upper surfaces of the roller support plates. And a plurality of vibration transmission rollers that rotate by the driving force of the drive motors and that rotate the front wheels and the rear wheels of the vehicle fixedly held by the holding means. Characterized by comprising.

In the above structure, the motor support and the sensor support are separate bodies, but these support bases are not distinguished from each other, and the drive motor and the vibration transmission roller are combined into one upper support base. May be provided on the upper surface of each.

The driving force of the drive motor may be transmitted to the vibration transmitting roller not only through a power transmitting means such as a belt but also through a coupling.

[0010]

When the drive motor is driven, the drive force is transmitted to the vibration transmission roller via the power transmission means or the coupling. The front wheels and the rear wheels of the vehicle are rotated by the rotation of vibration transmission rollers located at the front and rear. As a result, the vehicle fixedly held by the holding means is
For example, when traveling on a general highway at 120 km / h, a state close to actual traveling is reproduced.

However, an abnormal vibration generated when either the front wheel or the rear wheel, or both the front wheel and the rear wheel is rotating at a constant speed or at an acceleration / deceleration, is transmitted through each vibration transmission roller.
It is transmitted to each vibration detecting member. Then, the vibration of the front wheel and / or the vibration detected by the vibration detecting member is sent to the central processing unit as a vibration signal (frequency), and the shake or shimmy of the vehicle can be analyzed or analyzed.
Then, the data processed by the central processing unit is displayed on the display device.

[0012]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1 to 3 show a first embodiment of the present invention. Then, 1 is a pit formed on the floor surface.
This pit 1 is provided in an inspection line where vehicle running noise, vibration, engine diagnosis, etc. are performed. Although the pits 1 are formed on the front wheel side and the rear wheel side of the wheel, respectively, one pit 1 may be formed on the floor surface.

Reference numeral 2 denotes a plurality of motor support bases respectively installed in the front and rear pits 1, and these motor support bases 2 have a required height. 3 is a support base 2 for each motor
A plurality of drive motors respectively provided on the upper surface of the.

Reference numeral 4 denotes a plurality of sensor support bases installed separately from the motor support base 2 in the pit 1, and these sensor support bases 4 are lower than the motor support base.

Reference numeral 5 is sandwiched between the sensor support base 4 and the roller support plate 6 provided above the sensor support base, and detects vibration of the vehicle 7. A plurality of vibration detection members. These vibration detecting members 5 are plate-shaped members having a plurality of sensors at the corners of the upper surface, etc., and are appropriately integrally attached to the sensor support bases 4 and the roller support plates 6.

Numeral 8 is provided on the upper surface of the roller support plate 6 via bearings 9 respectively, and is rotated by a driving force of each drive motor 3 via a power transmission means 10 such as a belt or a chain, and a holding means. 11 is a plurality of vibration transmission rollers that rotate the front wheel 12 and the rear wheel B of the vehicle 7 fixedly held by 11. As the holding means 11, in this embodiment, two lift devices appropriately buried in the floor surface F are used. A supporting portion 11b that engages with the underfloor of the wheel 7 is provided at the tip of the operating rod 11a of the lift device 11.

Reference numeral 14 is a pit cover plate, 15 is a central processing unit that is electrically connected to the vibration detecting member 5 and has operation buttons, a control panel, etc., and 16 is an electrical connection with the central processing unit 15. A television-type display device connected to
Reference numeral 17 denotes a sheet-shaped or block-shaped vibration-damping member that is laid on the inner wall surface of each pit 1 so as not to be affected by vibrations generated from other peripheral devices.

In the above construction, first, the vehicle 7 is placed on the floor F.
While traveling on, get on the front and rear vibration transmission rollers 8. Next, when the front wheels 12 and the rear wheels 13 of the vehicle 7 ride on the respective vibration transmission rollers 8, the holding means 11 supports the wheels so that the vehicle 7 does not move.

After that, each drive motor 3 is started.
In this case, the drive motors 3 can be driven simultaneously or individually. When the drive motor 3 is driven, the driving force is transmitted to each vibration transmission roller 8 via the power transmission means 10. Front wheel 1 of vehicle 7
2 and the rear wheel 13 are independently rotated by the rotation of each vibration transmission roller 8, but the rotational force is gradually increased,
For example, when traveling on a general highway at 120 km / h, a state close to actual traveling is reproduced.

Thus, the front wheel 12 and / or the rear wheel 1
Abnormal vibrations generated while 3 is rotating at a constant speed or acceleration / deceleration pass through the respective vibration transmission rollers 8 and the respective vibration detection members 5
Is transmitted to each. Then, the vibration of the front wheels 12 and / or the rear wheels 13 detected by each vibration detection member 5 is sent to the central processing unit 15 as a vibration signal (frequency), and the shake or shimmy of the vehicle can be analyzed or analyzed. Become. The data processed by the central processing unit 15 is displayed on the display unit 16.

[0022]

Other Embodiments Next, other embodiments of the present invention will be described. In the description of these embodiments, the same parts as those of the embodiment of the present invention are designated by the same reference numerals, and the duplicated description will be omitted.

In the second embodiment shown in FIGS. 4 and 5, the main difference from the embodiment of the present invention is that each drive motor 3A and each vibration transmission roller 8A have one upper support base. 6A is fixedly provided on the upper surface of 6A.

That is, 1A is the front and rear pits formed on the floor F, 4A is a plurality of lower support bases installed in each pit, and 5A is an upper support base 6A facing these lower support bases 4A. And a plurality of vibration detecting members 8A, which are respectively sandwiched between and to detect the vibration of the vehicle 7A, and 8A are a plurality of drive motors 3A fixedly provided on the upper surface of the upper support 6A and the same as the above. Each drive motor 3A provided on the upper surface of the upper support base 6A
The front wheels 12A and the rear wheels 1 of the vehicle 7A that are rotated by the driving force of the vehicle and are fixedly held by the holding means 11A.
3A is a vibration transmission roller that rotates 3A.

The third embodiment shown in FIGS. 6 to 8 is mainly different from the above-described embodiment of the present invention in that the construction of the first embodiment is the main part, and each drive motor 3B is coupled to the coupling 22B. This is a point where each roller is connected to each vibration transmission roller 8B via.

That is, 1B is the front and rear pits formed on the floor F, 2B is a plurality of motor support bases installed in each pit, and 3B is a plurality of drive units respectively provided on these support bases. On the other hand, motors, 4B are a plurality of sensor support bases separately installed in the pit from the motor support bases, and 5B are each sensor support bases 4B and above the sensor support bases. A plurality of vibration detecting members which are respectively sandwiched between the roller supporting plates 6B and which detect the vibration of the vehicle;
8B is provided on the upper surface of each roller support plate 6B,
Also, the output shaft of each drive motor 3B and the coupling 2
2B and connecting means respectively, and holding means 11B
And a plurality of vibration transmitting rollers that rotate the front wheels 12B and the rear wheels 13B of the vehicle 7B that are fixedly held by the above.

The fourth embodiment shown in FIGS. 9 to 11 is mainly different from the above-mentioned embodiment of the present invention in that the construction of the second embodiment is the main part and each drive motor 3C is coupled to the coupling 22C. The point is that they are connected to each of the vibration transmission rollers 8C via the.

That is, 1C is the front and rear pits formed on the floor F, 4C is each stepped support base body installed in each pit, 5C is the bottom of the support base body, and is located above this bottom part. A plurality of vibration detecting members, 3C, which are respectively sandwiched between the roller supporting bases 6C and detect the vibrations of the vehicle 7C, are fixedly provided on the upper surface of the upper part of the supporting base body 4C. A motor 8C is provided on the upper surface of each roller support base 6C, and each drive motor 3
A vehicle 7C that is connected to the output shaft of C through a coupling 22C and is fixedly held by a holding means 11C.
These are a plurality of vibration transmission rollers for rotating the front wheels 12C and the rear wheels 13C.

Incidentally, also in the above-mentioned second embodiment, third embodiment and fourth embodiment, the pits may be formed large as a whole.

[0030]

As is apparent from the above description, the present invention has the following effects.

(1) Since the vibration detecting member directly receives the vibration of the wheel, it is possible to detect the vibration of the vehicle caused by the unbalanced force of the tire more accurately than before.

(2) Since the front wheels and the rear wheels of the wheels can be independently rotated, particularly in a four-wheel drive vehicle, four wheels can be simultaneously or individually rotated to provide a shimmy shake and a shake shake. It is possible to determine the contribution of each wheel. Therefore, it is possible to further reproduce the actual traveling state when traveling on a general road, and it is possible to immediately deal with a vehicle having a large contribution ratio of shimmy and shake.

(3) Since it is not necessary to attach or detach the vibration detecting member to the handle as in the conventional case, the work efficiency in the inspection line can be improved. In addition, attaching the vibration detector to the steering wheel does not damage the automobile, which is a product, due to scratches.

(4) In the case of the embodiment in which the motor support base and the sensor support base are separate bodies, the vibration detection member is not affected by the direct vibration generated from the drive motor.

[Brief description of drawings]

[Figure 1]

FIG. 3 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 4 and

FIG. 5 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 6

FIG. 8 is an explanatory diagram showing a third embodiment of the present invention.

FIG. 9

FIG. 11 is an explanatory diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1, 1A, 1B, 1C ... Pit, 2, 2B ... Motor support base, 3, 3A, 3B, 3C ... Drive motor, 4, 4B ... Sensor support base, 4A ... Lower support base, 4C ... Support base body , 5, 5A, 5B, 5C ... Vibration detection member, 6, 6B, 6C ... Roller support base, 7, 7A, 7B, 7C ... Vehicle, 8, 8A, 8B, 8C ... Vibration transmission roller, 10 ... Power Transmission means, 11, 11A, 11B, 11C ... Holding means, 12, 12A, 12B, 12C ... Front wheels, 13, 13A, 13B, 13C ... Rear wheels, 15 ... Central processing unit, 17 ... Anti-vibration member, 22B, 22C ... Coupling.

Claims (4)

[Claims] 1. A pit formed on a floor surface, a plurality of motor support bases installed in the pit, a plurality of drive motors respectively provided on the support bases, and the pit. A plurality of sensor support bases installed separately from the motor support base, and a plurality of sensor support bases and a plurality of roller support plates respectively provided above the sensor support bases. And a plurality of vibration detecting members which are respectively sandwiched between and to detect the vibration of the vehicle, and which are respectively provided on the upper surface of the roller support plate and are rotated by the driving force of each drive motor. In addition, a vehicle vibration detection device comprising a plurality of vibration transmission rollers for respectively rotating a front wheel and a rear wheel of the vehicle fixedly held by a holding means. 2. A pit formed on the floor surface, a plurality of lower supporters installed in the pits, and upper supporters respectively facing these lower supporters are sandwiched therebetween. A plurality of vibration detecting members mounted to detect the vibration of the vehicle, a plurality of drive motors fixedly provided on the upper surface of the upper support base, and drive motors respectively provided on the upper surface of the upper support base. A vehicle vibration detection device comprising a plurality of vibration transmission rollers that rotate by the driving force of the vehicle and that respectively rotate a front wheel and a rear wheel of the vehicle that are fixedly held by a holding means. 3. A pit formed on a floor surface, a plurality of motor support bases installed in the pit, a plurality of drive motors respectively provided on the support bases, and the pit. A plurality of sensor support bases installed separately from the motor support base, and a plurality of sensor support bases and a plurality of roller support plates respectively provided above the sensor support bases. A plurality of vibration detecting members which are respectively sandwiched between and to detect the vibration of the vehicle, and which are respectively provided on the upper surface of the roller supporting plate and which are respectively coupled to the output shafts of the drive motors. And a plurality of vibration transmitting rollers for rotating the front wheel and the rear wheel of the vehicle, which are fixedly held by the holding means. 4. A pit formed on the floor surface, a plurality of support base bodies installed in these pits, and a sandwich-like structure between the support base bodies and the roller support bases facing each other. A plurality of vibration detection members that are installed in the vehicle to detect the vibration of the vehicle, a plurality of drive motors that are respectively provided on the upper surfaces of the support base bodies, and a plurality of drive motors that are provided on the upper surfaces of the roller support bases A vehicle vibration detecting device comprising a vibration transmitting roller connected to an output shaft of a drive motor via a coupling and rotating a front wheel and a rear wheel of a vehicle fixedly held by a holding means.