JPH0217232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flywheel device connected to a dynamometer, and is particularly intended to be compact by shortening the axial length.

Conventional flywheel devices are connected to test equipment, such as a chassis dynamometer, which performs tests indoors that are equivalent to driving the test vehicle on the road, and obtains data such as exhaust gas characteristics and fuel consumption characteristics. Fig. 1 shows a sectional view of a conventional flywheel device.

As shown in FIG. 1, a transmission shaft 1, which is driven and rotated by a test vehicle (not shown), is rotatably supported at both ends on a frame 4 via bearing stands 2 and 3, respectively. Further, the hollow shafts 5 and 6 are loosely fitted concentrically with the transmission shaft 1, and have both ends connected to bearing stands 7 and 6, respectively.
It is rotatably supported on the pedestal 4 via 8, 9, and 10. Furthermore, flywheels 11 and 12 apply an inertial load based on the inertial mass of the test vehicle.
are integrally attached concentrically to the hollow shafts 5 and 6, respectively, and the rotation of the transmission shaft 1 is controlled by clutches 13 and 13, respectively, interposed between the transmission shaft 1 and the hollow shafts 5 and 6. 14 selectively transmits the signal to the flywheels 11 and 12.

In such a conventional structure, the transmission shaft 1 and the frame 4
This results in an increase in the manufacturing cost and equipment cost of the device.

The present invention is intended to eliminate the drawbacks of the conventional device, and its purpose is to reduce the transmission shaft 1 as much as possible.
Another object of the present invention is to provide a flywheel device in which the length of the frame 4 is shortened, thereby reducing the manufacturing cost and equipment cost of the device and reducing the installation floor area.

The configuration of the present invention to achieve such an object includes a transmission shaft whose one end is connected to a dynamometer and is driven and rotated, and a first shaft which rotatably supports one end of the transmission shaft and is installed on a pedestal. a bearing stand, a hollow shaft loosely fitted concentrically with the transmission shaft, and a plurality of second bearing stands each rotatably supporting both ends of the hollow shaft and installed on the mount;
a flywheel integrally attached to the hollow shaft; a clutch provided between the hollow shaft and the transmission shaft and capable of transmitting the rotation of the transmission shaft to the hollow shaft; It is characterized by comprising a bearing interposed between the second bearing pedestal and rotatably supporting the transmission shaft on the pedestal together with the first bearing pedestal.

An embodiment of the present invention will be described in detail below with reference to FIG. In FIG. 2, a transmission shaft 1 driven and rotated by a test vehicle (not shown) has one end connected to a dynamometer (not shown), and this one end rotates on a pedestal 4 via a bearing pedestal 2 equipped with a ball bearing 2a. freely supported. Also, hollow shafts 5, 6
is loosely fitted concentrically with the transmission shaft 1, and is rotatably supported on the pedestal 4 via bearing stands 7, 8 and 9, 10 each having ball bearings 7a, 8a and 9a, 10a at both ends. has been done. Further, a ball bearing 10c interposed between a bearing cover 10b attached to the bearing stand 10 on the other end side of the transmission shaft 1 and the other end of the transmission shaft 1 is provided with The shaft 1 is rotatably supported on a pedestal 4, that is, the bearing pedestal 10 also serves to support the transmission shaft 1 and the hollow shaft 6. Furthermore, clutches 13 and 14 are provided between the dynamometer side ends of the hollow shafts 5 and 6 and the transmission shaft 1, respectively, for selectively transmitting the rotation of the transmission shaft 1 to the hollow shafts 5 and 6. Flywheels 11 and 12 are interposed and are integrally and concentrically attached to the hollow shafts 5 and 6, respectively, and apply an inertial load based on the inertial mass of the test vehicle.

In this embodiment, the bearing cover 10b and the bearing stand 10 are
Although it is assumed to be a split type, it is not necessarily limited to this and may be an integrated type. In addition, in this embodiment, the bearing cover 1
Although the ball bearing 10c is interposed between the ball bearing 10c and the other end of the transmission shaft 1, it is not necessarily limited to a ball bearing, and a roller bearing may be interposed.

In order to apply an inertial load based on the inertial mass of the test vehicle, the clutch 13 connects the hollow shaft 5 or 6 to which a flywheel 11 or 12 corresponding to the inertial mass of the test vehicle is integrally attached, and the transmission shaft 1. or 1
4, and then rotate the drive wheels of the test vehicle. Further, in this embodiment, the clutch 13 is disposed at the end of the hollow shaft 5 on the dynamometer side, but this is not necessarily the case. As shown in FIG. 3 showing another embodiment of the present invention, Clutch 13 and Clutch 14
are arranged together between the hollow shaft 5 and the hollow shaft 6, and furthermore, the bearing stand 2 supporting one end of the transmission shaft shown in FIG. 2 is omitted, and the bearing stand 2 shown in FIG. As shown, a bearing 7c is interposed between one end of the transmission shaft 1 and a bearing cover 7b attached to a bearing stand 7 that supports the hollow shaft 5, and the transmission shaft 1 is supported on the pedestal 4 together with the ball bearing 10c. By doing so, the axial length can be further shortened.

As explained in detail above, according to the flywheel device according to the present invention, the transmission shaft is connected between the bearing cover attached to the bearing stand supporting the hollow shaft on the other end side of the transmission shaft and the other end of the transmission shaft. By installing a bearing to support the transmission shaft, there is no need for a dedicated bearing stand for the transmission shaft, which shortens the length of the transmission shaft and the mount.The number of parts can also be reduced, reducing equipment manufacturing and equipment costs. Can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional flywheel device, and FIGS. 2 and 3 are sectional views of a flywheel device according to an embodiment of the present invention. Also, the symbols in the figure are: 1 is the transmission shaft, 2, 3, 7, 8, 9, 10 are the bearing pedestals, 4 is the mount, 5, 6 are the hollow shafts, 11, 12 are the flywheels, 13, 14 are the clutches, 7b,10
b is a bearing cover, and 7c and 10c are ball bearings.

Claims (1)

[Scope of utility model registration request] A transmission shaft whose one end side is connected to a dynamometer and driven to rotate; a first bearing stand that rotatably supports one end of the transmission shaft and is installed on a pedestal; and a first bearing stand that is loosely fitted concentrically with the transmission shaft. a hollow shaft, a plurality of second bearing stands rotatably supporting both ends of the hollow shaft and installed on the stand; a flywheel integrally attached to the hollow shaft; a clutch provided between a shaft and the transmission shaft and capable of transmitting the rotation of the transmission shaft to the hollow shaft; and a clutch interposed between the transmission shaft and the second bearing pedestal on the other end side; A flywheel device comprising: the first bearing stand and a bearing rotatably supporting the transmission shaft on the stand.