JP2788019B2 - Chassis dynamometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis dynamometer for carrying out a test by mounting a wheel of a vehicle under test on two rollers.

[0002]

2. Description of the Related Art FIG. 5 is an overall configuration diagram showing a conventional chassis dynamometer disclosed, for example, in Japanese Utility Model Publication No. 52-17841. The front and rear wheels of the vehicle 1 are mounted on two rollers 2 and 3, respectively, and one of the rollers 2 is connected to a flywheel 4 and a dynamometer 5 to measure the characteristics of the vehicle 1 on a chassis. The rollers 2 and 3 are supported as shown in FIG. That is, the roller 2 is supported on the fixed base 6, and the roller 3 is supported on the movable base 7. The movable table 7 is vertically movably guided by a fixed table 6, adjusted to a predetermined height by a screw jack 9, and fixed by bolts 8. FIG. 7 is a layout view showing a state in which the wheel 10 is mounted, and θ ₁ and θ ₂ are the center O of the wheel 10.
It indicates the angle between the center _O 2, _{O 3} of ₁ and the roller 2,3, A
Indicates the amount of movement of the roller 3. Reference numeral 3a denotes a position where the roller 3 moves up most, and 3b denotes a position where the roller 3 moves down most.

Next, the operation will be described. First, when the vehicle 1 is changed from the state shown in FIG. 6A to the state shown in FIG. There is no need to go over because the position is high. Next, when the vehicle 1 is suddenly braked in the state shown in FIG. There is no need to go over because the position is high. Thus, sudden acceleration,
It is a chassis dynamometer that supports sudden braking tests. The positional relationship between the wheel 10 and the rollers 2 and 3 in the states C and B in FIG. 6 is expressed as shown in FIGS. To obtain θ ₁ and θ ₂ , the movement amount A is required. When adjusting the height of the roller 3, first,
When the bolt 8 is loosened and the screw jack 9 is turned, and when the roller 3 reaches a predetermined height, the screw jack 9 stops rotating and the bolt 8 is tightened to set.

[0004]

The conventional chassis dynamometer is constructed as described above, and the operation of setting the angle between the wheel and the roller is performed only by the vertical movement of the roller. In such a case, it is necessary to increase the amount of movement, and there are problems such as dimensional restrictions on the device configuration and an increase in manufacturing cost.

The present invention has been made to solve the above problems, and has as its object to provide an inexpensive chassis dynamometer capable of setting a required angle between a roller and wheels with a small amount of movement. .

[0006]

According to the chassis dynamometer of the present invention, one of the two rollers is supported so as to be adjustable in position with an inclination with respect to the vertical direction of the fixed base. The roller position can be set for a wheel having an arbitrary diameter by moving in an oblique direction.

[0007]

The chassis dynamometer according to the present invention comprises:
By adjusting the position of the other roller relative to one roller in an oblique direction with respect to the fixed base, the angle between the wheel and the roller can be set. It can be carried out.

[0008]

[Embodiment 1] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an embodiment of a chassis dynamometer according to the present invention, in which 2, 3, 6, 8, 9
Are the same components as those shown in the embodiment of FIG. 6, the conventional example differs from the moving table 11, pairs in a horizontal plane of the fixing base 6
It is configured to be guided so as to be movable in a diagonal straight line direction, and is moved to a predetermined position by a screw jack 9,
It is fixed by bolts 8. FIG. 2 shows the wheel 10 shown in FIG.
FIG. 4 is a layout diagram illustrating a positional relationship between the rollers and rollers 2 and 3.

Next, the operation will be described. When the vehicle 1 is suddenly accelerated on the rollers 2 and 3 in the state shown in FIG. 2B, a dynamometer (not shown) connected to the roller 2
The vehicle 1 tries to get over the roller 2 against the absorption load of the above, but does not go over because the position of the roller 2 is high.
When the car 1 is suddenly braked in the state shown in FIG. However, since the position of the roller 3 is high, it does not exceed it. Thus, sudden acceleration,
It is a chassis dynamometer that supports sudden braking tests. Meanwhile positional relationship between the wheel 10 and the roller 2, 3 in FIG. 2 b, is expressed as B, the required angle theta ₁ to the wheel 10 does not move over the rollers 2 and _3, the movement amount for obtaining a theta ₂ A However, since the moving direction of the movable roller can be moved obliquely, the required moving amount can be reduced.

Embodiment 2 FIG. In the above embodiment, although the case of moving the roller 3 in an oblique linear direction, circular roller 3 as shown in FIG. 3
It may be moved in an oblique direction along an arc-shaped trajectory, and the same effects as in the first embodiment can be obtained. That is, in FIG.
Numerals 3, 6, and 9 are the same as those shown in the embodiment of FIG. 1. Numeral 12 denotes a movable table for supporting the roller 3, 13 denotes a movable fulcrum provided on the movable table 12, and 14 denotes a fixed table 6. The fixed fulcrum 15 is a lever for rotatably connecting the movable fulcrum 13 and the fixed fulcrum 14.

Next, the operation will be described. When the screw jack 9 is turned, the movable base 12 is tilted obliquely in an arc around the fulcrum 14 by the fulcrums 13 and 14 and the lever 15.
And the position of the roller 3 can be adjusted. FIG. 4 shows the positional relationship between the wheel 10 and the rollers 2 and 3, and the necessary movement amount A for obtaining the required angles θ ₁ and θ ₂ for the wheel 10 not to get over the rollers 2 and 3.
Is less than before.

Embodiment 3 FIG. In the first and second embodiments, the roller 3 is moved by the screw jack 9 as the moving means. However, a hydraulic cylinder, a pneumatic cylinder, or a screw shaft mechanism driven by an electric motor may be used.

In the first and second embodiments, the rear roller 3 is movable. However, the front roller 2 may be movable, and the roller 3 may be fixed to a fixed base. In this case, the flywheel and the dynamometer are connected to the front roller 2 via flexible shaft coupling means.

Further, in the second embodiment, the movable platform is guided by the fulcrums 13, 14 and the lever 15, but may be guided by a curved sliding or rolling member.

[0015]

According to the present invention as described above, according to the present invention, since to be able to move in an oblique direction against the movement of the movable roller on the fixed base of the horizontal plane, it is possible to reduce the required amount of movement, also movable The side roller moves in one direction,
Therefore, a corresponding device can be made compact and inexpensive.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIGS. 2 (a) and 2 (b) are arrangement diagrams of the first embodiment with wheels mounted thereon.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIGS. 4A and 4B are layout diagrams of a state in which wheels are mounted according to the second embodiment.

FIG. 5 is an overall configuration diagram showing a conventional chassis dynamometer.

FIG. 6 is a front view showing a conventional fixed base portion,
C is an explanatory diagram of the operation.

7 (a) and 7 (b) are arrangement diagrams of a conventional wheel mounted state.

[Explanation of symbols]

2 front roller, 3 rear roller, 5 dynamometer, 6 fixing stand, 9 screw jack, 10 wheels, 1
1,12 Mobile platform.

Claims (1)

(57) [Claims] 1. A chassis dynamometer in which wheels are mounted on two front and rear rollers and characteristics of a vehicle under test are measured by a dynamometer connected to one of the rollers, wherein one of the rollers is one of the rollers. And the other roller are rotatably supported.
Together with the fixed table move obliquely to the horizontal plane
A carriage that is adjusted to set the required angle between rollers and wheels
Chassis dynamometer equipped with .