JPH076880B2 - Vibration detection device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle vibration detecting apparatus for detecting a shake or shimmy vibration that occurs 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 imbalance of a rotating body, and those that are caused by the 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 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) caused by 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 judgment 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 former case, since it depends on the human senses, accurate and stable evaluation cannot be expected depending on the physical condition of the inspector. On the other hand, in the latter case, 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 generation, etc. Furthermore, by attaching a vibration detector to the handle, it may be scratched and damage the product car, etc. There was a drawback.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention is capable of accurately detecting the vibration of the vehicle due to the unbalanced force of the tire, and the work efficiency in the inspection line. It is to obtain a vehicle vibration detection device capable of improving

[0007]

A vehicle vibration detecting device of the present invention is provided with a pit formed on a floor surface, a motor support base installed in the pit, and a fixed mount provided on the support base. Drive motor, on the other hand, a sensor support installed in the pit separately from the motor support, and a sensor support and a roller support provided above the sensor support. A vibration detection member that is interposed between the plate and the plate to detect the vibration of the vehicle and that is provided on the upper surface of the roller support plate and that is rotated by the driving force of the drive motor and is fixed by the holding means. And a vibration transmission roller for rotating a front wheel of the vehicle that is held in a dynamic manner.

In the above structure, the motor support and the sensor support are separate bodies, but these support bases are not distinguished, 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 transmission roller not only through a power transmission 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 of the vehicle are rotated by the rotation of vibration transmission rollers. As a result, the vehicle fixedly held by the holding means is, for example, 120 km on a general highway.
A state close to actual driving is reproduced, such as when driving at / h.

Therefore, the abnormal vibration generated while the front wheels are rotating at a constant speed or acceleration / deceleration is transmitted to the vibration detecting member via the vibration transmitting roller. Then, the vibration of the front wheels detected by the vibration detecting member is sent to the central control unit as a vibration signal (frequency), and the shake or shimmy of the vehicle can be analyzed or analyzed.

[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.

Reference numeral 2 is a motor support base installed in the pit 1. The motor support base 2 has a required height. Reference numeral 3 is a drive motor fixedly provided on the upper surface of the motor support 2.

Reference numeral 4 denotes a sensor support installed in the pit 1 separately from the motor support 2. The sensor support 4 is lower than the motor support.

A vibration detecting member 5 is sandwiched between a sensor supporting base 4 and a roller supporting plate 6 provided above the sensor supporting base, and detects vibration of the vehicle 7. Is. The vibration detecting member 5 is a plate-shaped body having a plurality of sensors at the corners of the upper surface, etc., and is appropriately integrally attached to the sensor support base 4 and the roller support plate 6.

Numeral 8 is provided on the upper surface of the roller support plate 6 via a bearing 9 and is rotated by a driving force of the driving motor 3 via a power transmission means 10 such as a belt or a chain, and by a holding means 11. Vehicle 7 fixedly held
Is a roller for transmitting vibration for rotating the front wheel 12 of the above. Although the holding means 11 uses a plurality of vehicle stoppers for holding the rear wheels 13 of the vehicle in the present embodiment, a lift device for fixing the vehicle 7 to the floor F is embedded or engaged. You may deploy a chain.

Reference numeral 14 is a pit cover plate, 15 is an electric connection with the vibration detecting member 5, and a central control unit having operation buttons, a control panel, etc., and 16 is an electric connection with the central control unit 15. The television-type display device 17 is a sheet-like or block-like rod vibrating member laid on the inner wall surface of the pit 1 so as not to be affected by vibration generated from other devices in the vicinity.

In the above structure, first, the vehicle 7 is placed on the floor F.
While traveling, get on the vibration transmission roller 8. Next, when the front wheel 12 of the vehicle 7 rides on the vibration transmission roller 8 in a desired state, the holding means 11 is provided so that the vehicle 7 does not move.
Is set on the rear wheel 13.

After that, the drive motor 3 is started. When the drive motor 3 is driven, the driving force is transmitted to the vibration transmission roller 8 via the power transmission means 10. The front wheel 12 of the vehicle 7 is rotated by the rotation of the vibration transmission roller 8, but the rotational force is gradually increased, and a state close to actual traveling is reproduced, for example, when traveling on a general highway at 120 km / h.

However, the abnormal vibration generated while the front wheels 12 are rotating at a constant speed or acceleration / deceleration is generated by the vibration transmitting roller 8
Is transmitted to the vibration detection member 5 via. Then, the vibration of the front wheels 12 detected by the vibration detecting member 5 is sent to the central controller 15 as a vibration signal (frequency), and the shake or shimmy of the vehicle can be analyzed or analyzed.

[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 will be designated by the same reference numerals, and overlapping description will be omitted.

In the second embodiment shown in FIGS. 4 and 5, the main difference from the embodiment of the present invention lies in the pit 1A.
The drive motor 3A and the vibration transmission roller 8A are fixedly provided on the upper surface of one upper support 6A, respectively, and the rear wheel 13A of the vehicle 7A
Is on a rear wheel support base 21 having a rear wheel support roller 20 and movable back and forth, and the holding means 11A of the vehicle 7A is a lift device.

That is, 1A is a pit formed on the floor F, 4A is a lower support stand installed in the pit, 5A is a sandwiched vehicle between the lower support stand 4A and the upper support stand 6A, and is a vehicle. Vibration detection member for detecting vibration of 7A, 8
A is a drive motor 3A fixedly provided on the upper surface of the upper support base 6A, and is also provided on the upper surface of the upper support base 6A, is rotated by the driving force of the drive motor 3A, and is fixedly held by the holding means 11A. Front wheel 1 of vehicle 7A
2A is a vibration transmission roller that rotates 2A.

The third embodiment shown in FIGS. 6 and 7 is mainly different from the above-mentioned embodiment of the present invention in that the construction of the first embodiment is the main part and the drive motor 3B is coupled to the coupling 2
The point is that it is connected to the vibration transmission roller 8B through the line 2.

That is, 1B is a pit formed on the floor F, 2B is a motor support installed in the pit, 3B
Is a drive motor fixedly installed on the support base, while 4B
Is a sensor support stand installed in the pit separately from the motor support stand, and 5B is between the sensor support stand 4B and a roller support plate 6B provided above the sensor support stand. A vibration detecting member 8B, which is interposed in a sandwich shape to detect the vibration of the vehicle, is provided on the upper surface of the roller support plate 6B, and is connected to the output shaft of the drive motor 3B via a coupling 22. , A vibration transmission roller for rotating the front wheel 12B of the vehicle 7B fixedly held by the holding means 11B. In addition,
Also in this embodiment, the holding means 11B may be a fixed chain, a lift device, or the like.

The fourth embodiment shown in FIGS. 8 and 9 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 the drive motor 3C is coupled to the coupling 2.
The point is that it is connected to the vibration transmission roller 8C via 2C.

That is, 1C is a pit formed on the floor F, 4C is a stepped support body installed in the pit,
5C is a vibration detecting member that is sandwiched between the bottom of the support base and a roller support 6C located above the bottom to detect the vibration of the vehicle 7C. 3C is a high part of the support base 4C. A drive motor fixedly provided on the upper surface,
8C is a vibration transmission that is provided on the upper surface of the roller support base 6C, is connected to the output shaft of the drive motor 3C via a coupling 22C, and rotates the front wheel 12C of the vehicle 7C fixedly held by the holding means 11C. Roller. Incidentally, also in this embodiment, the holding means 11C may be a fixed chain, a lift device or the like.

[0029]

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 front wheels, the vibration of the vehicle due to the unbalance force of the tire can be detected more accurately than before.

(2) Since it is not necessary to attach or detach the vibration detecting member to or from the handle as in the conventional case, the work efficiency in the inspection line can be improved. Also, by attaching the vibration detector to the steering wheel, there is no possibility that the steering wheel is damaged and the automobile, which is a product, is damaged.

(3) In the case of the embodiment in which the motor support and the sensor support are separate bodies, the vibration detecting 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 and

FIG. 7 is an explanatory diagram showing a third embodiment of the present invention.

FIG. 8 and

FIG. 9 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 wheel, 15 ... Central control device, 17 ... Anti-vibration member, 22, 22C ... Coupling.

Claims (4)

[Claims] 1. A pit formed on a floor surface, a motor support installed in the pit, a drive motor fixedly provided on the support, and a motor for the motor installed in the pit. Vibration of the vehicle, which is sandwiched between the sensor support installed separately from the support and the sensor support and the roller support plate provided above the sensor support. A vibration detection member for detecting
Vibration detection for a vehicle, which is provided on an upper surface of the roller support plate and includes a vibration transmission roller that rotates by a driving force of the drive motor and that rotates a front wheel of the vehicle that is fixedly held by a holding means. apparatus. 2. A pit formed on a floor surface, a lower support stand installed in the pit, and a sandwich-like interposed between the lower support stand and the upper support stand to detect vibration of the vehicle. A vibration detection member, a drive motor fixedly provided on the upper surface of the upper support, and a vehicle fixed on the upper surface of the upper support and rotated by a driving force of the drive motor and fixedly held by a holding means. Vibration detection device for a vehicle, which comprises a vibration transmission roller for rotating the front wheel of the vehicle. 3. A pit formed on a floor surface, a motor support stand installed in the pit, a drive motor fixedly provided on the support stand, and a motor for the motor provided in the pit. Vibration of the vehicle, which is sandwiched between the sensor support installed separately from the support and the sensor support and the roller support plate provided above the sensor support. A vibration detection member for detecting
From a vibration transmission roller that is provided on the upper surface of the roller support plate and that is connected to the output shaft of the drive motor through a coupling and that rotates the front wheel of the vehicle that is fixedly held by the holding means. Vibration detection device for vehicles. 4. A pit formed on the floor surface, a support base body installed in the pit, and a sandwiching interposed between the support base body and the roller support base to detect vehicle vibration. The vibration detecting member, the drive motor fixedly provided on the upper surface of the support base, and the output shaft of the drive motor provided on the upper surface of the roller support base are connected to each other via a coupling, and the holding means A vehicle vibration detection device comprising a vibration transmission roller that rotates a front wheel of a vehicle that is fixedly held.