JPS647289Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pit cover device and is suitable for use in a chassis dynamometer equipped with a movable roller device.

Conventionally, chassis dynamometers have been used to perform tests by reproducing the driving conditions of a vehicle on the road indoors. In this chassis dynamometer, tests are conducted with the drive wheel of the vehicle placed on a roller while the other wheel is fixed on a floor surface such as a pit cover.

However, as vehicle drive systems are adopted, those in which the rear wheels are the driving wheels (hereinafter referred to as FR vehicles) and those in which the front wheels are the driving wheels (hereinafter referred to as FF vehicles), the first FR car 1 as shown in the figure
In this case, the rear wheels are placed on the rollers 4 of the chassis dynamometer 3 which is fixedly installed in the pit 2, and the cooling device 5 is installed in front of the vehicle 1, and various measuring instruments are placed in the position of the FR vehicle 1. Install it according to your needs and perform the test. On the other hand, in the case of the FF vehicle 6, since the driving wheels are the front wheels, the front wheels are placed on the rollers 4.
Compared to the case of the FR vehicle 1, the vehicle 6 must be moved to the rear of the test chamber 7 and fixed, and the cooling device 5 and the like must also be moved accordingly. For this reason, there are drawbacks such as the complicated movement and adjustment of the cooling device 5 and the like and the need for a large testing chamber 7.

Therefore, it has been proposed to move the roller 4 of the chassis dynamometer 3 so that the FR car 1 and the FF car 6 can be tested at almost the same position in the test room. It is necessary to remove and move the pit cover 8 corresponding to the moving path of No. 4, which has the disadvantage that this moving work is very complicated.

This idea was made in view of the current situation,
To provide a pit cover device which allows a pit cover to be easily moved even when the roller of a chassis dynamometer is moved so that a test can be carried out at a substantially constant position regardless of the drive system of a vehicle. The structure of the present invention that achieves this object is such that the roller device of the chassis dynamometer is mounted on a slide bed that is formed to be slidable along a slide rail laid in a pit. a moving pit cover that is attached with a predetermined opening formed in the center in the moving direction through which the upper surface of the roller of the roller device faces; a pit hole formed in the upper part of the pit corresponding to the moving path of the slide bed; and a lower surface. is in sliding contact with the upper surfaces of the movable pit cover and the roller or is positioned above these upper surfaces, and when the length of the movable pit cover in the moving direction is L and the interval between the fixed pit covers in the circumferential direction is l, l<L. The pit cover is characterized by comprising three fixed pit covers that cover the pit hole at intervals l such that a relationship is established, and a movable lid that covers the part of the pit hole other than the part covered by the movable pit cover and the fixed pit cover.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

A chassis dynamometer in which the pit cover device of the present invention is installed has a pit 1 as shown in Fig. 2.
A roller device 13 is attached via a slide bed 12 that is movable along a slide rail 11 laid on the bottom of the FF.
By moving this roller device 13 according to the vehicle or FR vehicle, the vehicle can be fixed at approximately the same position in the test chamber and the test can be performed.

Therefore, as shown in FIG.
A pit hole 14 is formed by opening the upper part of the pit 10 in a portion corresponding to the movement range of the roller. Device 1
The fixed pit covers 15 are separated from the pits 10 by a large distance l that allows the mounting of the fixed pit covers 15 and 3.
It is fixed so as to cover the pit hole 14 of. A movable pit cover 17, which is positioned so as to be in contact with the lower surface of the fixed pit cover 15 and has a predetermined opening 16 formed therein so that the rollers of the roller device 13 can come out, is inserted into the slide bed 12 via a support post 18 erected thereon. The length L to both ends of the attached movable pit cover 17 is the fixed pit cover 15.
The distance between the fixed pit covers 15 and 15 is made larger than the distance 1 between the movable pit covers 17 and the fixed pit covers 15 at each moving position.

In the pit cover device configured as above,
When testing FF vehicles, as shown in Figure 4,
The roller device 13 is moved to the F position on the front side of the test chamber, and the space between the two fixed pit covers 15 corresponding to this F position is closed with the movable pit cover 17 attached to the slide bed 12.
A movable lid 19 covers the space between the fixed pit covers 15 corresponding to the positions.

When testing an FR vehicle from this state, the roller device 13 is moved to the R position, but first, the movable lid 19 between the corresponding fixed pit covers 15 is removed at the R position. And fixed pit cover 15
Slide bed 12 at the lower pit hole 14 part.
By moving the movable pit cover 17, the roller device 13 is positioned at a predetermined position as shown in FIG. By doing this, the fixed pit cover 15 corresponding to the R position
The gap is closed by the movable pit cover 17. On the other hand, the space between the fixed pit covers 15 at position F is opened, but the pit holes 14 are
Block with 9.

In addition, when adjusting the position of the roller device 13 at the F and R positions, this can be done by increasing the overall length of the movable pit cover 17, and adjustment can also be made for vehicles with different wheel bases. Furthermore, if the entire length of the movable pit cover 17 is not made to be long, several movable lids 19 may be used to cover it.

As specifically explained above in conjunction with the embodiments, according to the present invention, at least one of the fixed pit covers fixed in a predetermined position can be covered with the movable pit cover, so that the movement of the pit cover due to the movement of the slide bed can be prevented. If applied to a chassis dynamometer, testing of FR and FF vehicles can be done efficiently.

Furthermore, even if the wheelbase is different for either FR or FF cars, fine adjustments can be made accordingly.

[Brief explanation of drawings]

Fig. 1 is a front view of a conventional chassis dynamometer, Figs. 2 and 3 are a sectional view and a plan view of an embodiment of the pit cover device of the present invention, and Figs. 4 and 5 are explanatory diagrams of operation. It is. In the drawing, 10 is a pit, 11 is a slide rail, 12 is a slide bed, 13 is a roller device,
14 is a pit hole, 15 is a fixed pit cover, 16
17 is an opening, 17 is a movable pit cover, 18 is a column, 19 is a movable lid, and F and R are movable positions.

Claims (1)

[Claims for Utility Model Registration] A roller device of a chassis dynamometer is mounted on a slide bed that is formed to be slidable along a slide rail laid in a pit, and a roller device is mounted on the slide bed. a movable pit cover attached with a predetermined opening formed in the center thereof through which the upper surface of the roller of the roller device faces; a pit hole formed in the upper part of the pit corresponding to the moving path of the slide bed; and a movable pit cover with a lower surface. and is in sliding contact with the upper surfaces of the rollers or located above these upper surfaces, and when the length of the movable pit cover in the moving direction is L and the interval between the fixed pit covers in the circumferential direction is l, the relationship l<L holds true. A pit cover device comprising: three fixed pit covers that cover a pit hole with an interval l between them; and a movable lid that covers a portion of the pit hole other than the portion covered by the movable pit cover and the fixed pit cover.