JPS647296Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact and inexpensive chassis dynamometer for testing the performance and characteristics of two-wheeled vehicles and four-wheeled vehicles with widely different treads.

A chassis dynamometer is a device that places the driving wheels of a car on rollers and runs them on a road instead of the road, and performs dynamic tests such as various performance, exhaust gas, brakes, noise, fuel efficiency, etc. In the sea dynamometer, rollers for two-wheel vehicles with one drive wheel and rollers for four-wheel vehicles with two drive wheels were used. Furthermore, even in four-wheeled vehicles, the tread is significantly different between small passenger cars and large trucks, so two types of rollers with different spacing must be prepared to accommodate this, and if only the equipment cost is limited to the installation area and roller combinations. There was a drawback that the work time etc. increased significantly.

Therefore, it is conceivable to fix multiple rollers to a rotating shaft connected to a dynamometer and share them all, but in a particularly light two-wheeled vehicle, it would be difficult to rotate the remaining rollers, which have a large inertial mass. However, even if the number of rollers is simply increased, it is impossible to share them with different specimens.

Based on the above-mentioned findings, the present invention aims to provide a compact and inexpensive chassis dynamometer that is capable of testing two-wheeled vehicles and four-wheeled vehicles with different treads.

The structure of the chassis dynamometer of the present invention that achieves this objective is such that at least three rollers on which the wheels of the test object are mounted are mounted in series on a rotating shaft connected to the dynamometer, and at least two of these rollers are mounted in series on a rotating shaft connected to the dynamometer. The present invention is characterized in that a clutch is interposed between the two rollers and the rotating shaft to independently switch the at least two rollers into a stationary state or an integrally rotating state with respect to the rotation of the rotating shaft. .

Hereinafter, an embodiment of the chassis dynamometer according to the present invention will be described in detail with reference to FIGS. 1 and 2.

As shown in FIG. 1 showing the appearance of this embodiment, a rotating shaft 13 has three rollers 11, 12a, and 12b mounted in series on which wheels (driving wheels) of a specimen (not shown) are selectively placed. A dynamometer 14 and a flywheel 15 are connected to both ends of the dynamometer 14 and a flywheel 15, respectively.
The side roller 11 is integrally fixed to this rotating shaft 13. As shown in FIG. 2, which shows the state of connection between the remaining two rollers 12a, 12b and the rotating shaft 13, these remaining two rollers 12a, 12b have bearing bosses integrated with a bracket 16 that rotatably supports the rotating shaft 13. 17 via bearings 18 so as to be rotatable, and the rollers 12a,
A first fitting cylinder 20 and a second fitting cylinder 21 facing the first fitting cylinder 20 and having a cylindrical shape integral with the rotating shaft 12b and having a spline 19 carved on the outer periphery are each integrally attached to the rotating shaft 13. A spline 22 is also carved on the outer periphery of the second fitting cylinder 21, and is slidably fitted into the first fitting cylinder 20 and the second fitting cylinder 21 to integrally connect them. By operating the slider 23, the rotational force of the rotating shaft 13 is applied to these rollers 12.
a, 12b, or is transmitted to them. In other words, the first fitting tube 20, the second fitting tube 21, and the slider 23 are connected to the roller 12.
Although the clutches 24a and 24b of the clutches 24a and 24b are constructed respectively, it is of course possible to use clutches other than this construction.

When testing a two-wheeled vehicle, the slider 23 is moved toward the first fitting tube 20 side, the slider 23 and the second fitting tube 21 are disengaged, and the drive wheel is placed on the roller 11 and tested. I do. At this time,
Since the rollers 12a and 12b are in a stationary state with respect to the rotation of the rotating shaft 13, the load is reduced by the inertial mass of these rollers 12a and 12b, and no inconvenience occurs. In addition, in the case of a test object with a large torque, these rollers 12
a and 12b can also be used as a flywheel.

On the other hand, when testing a four-wheeled vehicle, the rollers 12a and 12 are
Move one of the sliders 23 to the second fitting cylinder 21 side to connect the first fitting cylinder 20 and the second fitting cylinder 2.
1 through the slider 23, and one of the rollers 12a and 12b is connected to the rotating shaft 13.
It would be better to integrate it with In other words, in the case of a small four-wheel vehicle with a narrow tread, the center roller 12
By engaging only the clutch 24a, the roller 12a is also integrated with the rotating shaft 13, and the driving wheels are connected to the rollers 11, 1.
2a. Furthermore, in the case of a large four-wheel vehicle with a wide tread, only the clutch 24b of the roller 12b on the flywheel 15 side is connected to integrate the roller 12b with the rotating shaft 13, and the driving wheels are placed on the rollers 11 and 12b. do. In either case, the remaining roller remains stationary with respect to the rotation of the rotating shaft 13, but it is also possible to connect the clutch of this roller and use it as a flywheel. There is an advantage that there is no need to prepare the flywheel 15, or at least the equipment for the flywheel 15 can be made smaller.

Incidentally, if it is not desired to specify the rollers on which the drive wheels of the two-wheeled vehicle are placed in one place, it is preferable to attach a clutch to the rollers 11 as well. In addition, if testing accuracy is required, four rollers may be provided and the inner two rollers may be used to test four-wheeled vehicles with narrow treads, while the outer two rollers may be used to test four-wheeled vehicles with wide treads. It is possible.

As described above, according to the chassis dynamometer of the present invention, at least three rollers on which the drive wheels of the test object are placed are attached in series to the rotating shaft, and at least two of them are connected to the rotating shaft via a clutch. However, since the rollers on which the drive wheels are not mounted can be made to idle as needed or used as flywheels, a total of three chassis dynamometers have been used in the past, one for two-wheeled vehicles and one for four-wheeled vehicles with different treads. Only one meter is required, and as a result, equipment costs can be significantly reduced, and the installation floor space can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing an embodiment of a chassis dynamometer according to the present invention, and FIG. 2 is a cutaway view showing the internal structure of the roller. Also, in the figure, 11, 12a, 12b are rollers, 13 is a rotating shaft, 14 is a dynamometer, 15 is a flywheel, 18 is a bearing, 19, 22 is a spline, 23 is a slider, 24a, 24b is a clutch. be.

Claims (1)

[Scope of utility model registration request] At least three rollers on which the wheels of the test object are mounted are mounted in series on a rotating shaft connected to a dynamometer, and these at least two rollers are placed between at least two of the rollers and the rotating shaft. A chassis dynamometer characterized in that a clutch is provided which independently switches between a stationary state and an integrally rotating state with respect to the rotation of the rotating shaft.