JPH067351Y2 - Roller device for chassis dynamometer - Google Patents

Description

Detailed Description of the Invention A. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a roller device for a chassis dynamometer, and more specifically, to improve the performance of the chassis dynamometer and downsize the entire machine by incorporating a flywheel between the rollers.

B. Outline of the Invention In the present invention, the flywheel, which is a separate body from the conventional chassis dynamometer, is incorporated in the roller device, so that the natural frequency of the rotating part is increased, the number of members is reduced, and the size of the entire machine is reduced. Can be realized. As a result, smooth driving without vibration can be performed during a ride comfort test, etc., while improving test performance and reducing manufacturing cost.

C. 2. Description of the Related Art A chassis dynamometer is a device used for power performance tests of vehicles. The chassis dynamometer is a device that allows driving wheels to be placed on rollers to run the vehicle while applying an arbitrary load to the rollers to simulate various running states.

FIG. 2 schematically shows an example of a conventional chassis dynamometer.

In the drawing, a torque meter 02 is attached to the dynamometer body 01, a roller device 03 is connected to the left side, and a flywheel device 04 is further connected to the left side of the roller device 03. The drive wheels 06 of the vehicle under test 05 are placed on a pair of rollers 07 of the roller device 03.

Power measurement is performed by driving the rollers 07 and the rotor (not shown) in the dynamometer body 01 by the drive wheels 06. A dynamometer body 01 has a stator core (not shown), and an exciting current is passed through the stator core to generate a load torque by electromagnetic induction.
On the other hand, the torque meter 02 detects the swing torque of the dynamometer main body 01 and compares it with the current value of the exciting current to measure the output of the vehicle under test.

The flywheel device 04 connected to the roller device 03 is
Both have a fixed flywheel and an adjusting flywheel (not shown) inside. Then, the adjusting flywheel is connected to or separated from the rotary shaft by a moving device (not shown) to simulate a traveling load condition such as acceleration and climbing.

D. Problems to be Solved by the Invention By the way, the main application of the chassis dynamometer is a power performance test as described above, but in recent years, it is also increasingly used for a ride comfort test. This is because accurate tests cannot be performed in actual driving due to changes in road surface conditions and weather conditions, and is also related to the recent strong demand for improved ride comfort in passenger cars and the like.

However, in the above-mentioned conventional chassis dynamometer, since the roller device 03 and the flywheel device 04 are separated from each other, there are the following drawbacks when used for the ride comfort test. The roller device 03 and the flywheel device 04 are
Normally, they are connected by a coupling 08, but the natural frequency naturally lowers at this binding site. Therefore, a vibration of a magnitude that cannot be ignored depending on the rotation range used occurs in the portion, and the vibration is transmitted via the roller 07 to the vehicle under test 05.
It is also transmitted to. In the ride comfort test, vibration from the engine is also subject to evaluation, and the presence of vibration due to such external factors has been a serious problem.

On the other hand, in the power performance test, the total moment of inertia of rotating members such as the roller 07 and the flywheel (hereinafter referred to as G
D ² ) must be obtained accurately. However, when the roller device 03 and the flywheel device 04 are separated from each other, the number of rotary members is large, so that the measurement and calculation of GD ² are complicated and complicated, and it is difficult to obtain an accurate value.

E. Therefore, in the present invention, in a roller device for a chassis dynamometer in which a pair of rollers are coaxially arranged, a flywheel is incorporated between the rollers.

F. The roller device for chassis dynamometer according to the present invention,
Since the flywheel is built in between the rollers of the roller device, it is no longer necessary to connect a separate flywheel device to the roller device.

G. Embodiment Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a half cross section of a roller device according to this embodiment.

As shown in the drawing, in this embodiment, large and small first and second adjusting flywheels 3, 4 are arranged between the left and right rollers 1, 2. These adjusting flywheels 3 and 4 are bolted to sleeves 7 and 8 which are rotatably supported by pedestals 5 and 6, so that they can rotate independently of the rotating shafts 9 of the rollers 1 and 2. ing. On the other hand, annular electromagnetic toothed clutches (hereinafter referred to as clutches) 10 and 11 are attached to the sleeves 7 and 8, respectively.
The sleeves 7 and 8, that is, the adjusting flywheels 3 and 4 are respectively integrated with the rotary shaft 9 by the operation of 0 and 11. In the figure, 12 is a fixed flywheel attached to the outer surface of the left and right rollers 1, 2.

The operations of the adjusting flywheels 3 and 4 in this embodiment are the same as those of the conventional flywheel device, and the clutch 1 is used when simulating during load traveling such as acceleration and climbing.
0 and 11 individually or both are integrated with the rotary shaft 9.

As described above, in this embodiment, the flywheels 3, 4 and 12 are incorporated in the roller device so as to have the function of the conventional flywheel device. Therefore, various problems of the conventional chassis dynamometer described above are eliminated. Was done. As a result, the number of parts of the chassis dynamometer as a whole was naturally reduced, and the flywheel device was no longer required, and the size was reduced.

Although only the adjusting flywheels 3 and 4 are arranged between the rollers 1 and 2 in this embodiment, the fixed flywheel 12 may be arranged between the rollers 1 and 2. Further, although the adjustment flywheels 3 and 4 and the rotary shaft 9 are coupled by the tooth-shaped electromagnetic clutches 10 and 11 in the present embodiment, other types of clutches such as a tooth-shaped manual clutch may be used.

H. Advantageous Effects of Invention According to the roller device for chassis dynamometer according to the present invention, since the flywheel is built in the roller device, the above-mentioned various problems caused by connecting the flywheel device as a separate body are eliminated. At the same time, it is possible to reduce the number of parts and downsize the device.

[Brief description of drawings]

FIG. 1 is a half sectional view showing an embodiment of a roller device according to the present invention, and FIG. 2 is a simplified view showing a conventional chassis dynamometer. In the figure, 1 and 2 are rollers, 3 and 4 are first and second adjusting flywheels, 5 and 6 are pedestals, 7 and 8 are sleeves, 9 is a rotating shaft, 10 and 11 are electromagnetic tooth clutches, and 12 is fixed. It is a flywheel.

Claims (1)

[Scope of utility model registration request] 1. A chassis dynamometer roller device comprising a pair of rollers arranged coaxially with each other, wherein a flywheel is incorporated between the rollers.