JPH11316176A - Chassis dynamometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of frictional resistance when a slide bed moves while supporting a fixed beam by moving props. SOLUTION: Two pairs of moving props 26 and 27 are disposed upright on a slide bed 13 equipped with a moving roller 1 on which a wheel is put, and rollers 31 abutting to the lower surface of a fixed beam 21 to support the fixed beam 21, are installed at the upper ends of moving props 26 and 27, respectively. Thereby, the moving props 26 and 27 are made to support the fixed beam 21 while the rollers 31 are rolling under the fixed beam 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis dynamometer and relates to an improved pit cover support structure.

[0002]

2. Description of the Related Art FIG. 7 is a conceptual diagram of a conventional chassis dynamometer, and FIG. 8 is a view taken along the line AA of FIG. The fixed rollers 3 and 4 are dynamometers connected to the moving roller 1 and the fixed roller 2, respectively. Reference numeral 5 denotes a moving cover that covers the upper part of the moving roller 1, and has an opening 5 a for placing a driving wheel of a test vehicle on the moving roller 1. A large number of shutters 6 are connected to the front and rear of the movable cover 5 via hinges (not shown). The moving cover 5 and the shutter 6 are formed of a striped steel plate. In the vicinity of the fixed roller 2, the pit covers 10a, 10a
b.

Since the distance between the front and rear wheels of the vehicle, that is, the wheel base W differs depending on the type of vehicle, the moving roller 1
Must be movable in the front-rear direction of the vehicle, and accordingly, the movable cover 5 and the shutter 6 also need to be movable. In FIG. 8, 7, 21 are fixed beams, and 8a,
Reference numeral 8b denotes a receiving portion provided inside the fixed beams 7, 21. Reference numeral 9 denotes a sliding plate fixed on the receiving portions 8a, 8b. The shutter plate 6 and the movable cover 5 move on the sliding plate 9. When the moving roller 1 is slightly separated in the front-rear direction, the support mechanism is broken, so that the shutter 6 bends at the hinge portion and moves downward.

FIGS. 9 and 10 show details of the chassis dynamometer. A pit cover 10a is supported via a fixed beam 7 provided so as to bridge a fixed column 11. In order to move the moving roller 1, after loosening a lock bolt for fixing the slide bed 13 on the rail 12, the gear motor 14 is rotated in one direction. Since a ball screw (not shown) screwed to the slide bed 13 is linked to the gear motor 14, the slide bed 13 moves along the rail 12.

The sliding bed 13 has moving rollers 1 and
In addition to the dynamometer 3, a cooling blower 15 for cooling the dynamometer 3 and two pairs of movable supports 16, 17 are provided. As shown in FIG. 10, one pair of moving columns 1
6 are short and have a wide interval therebetween, while the other moving column 17 is long and has a short interval therebetween. A pair of moving supports 1
An auxiliary member 18 is fixed to the upper end of 6, and a pair of fixing stands 18 a having a U-shaped cross section is fixed on the auxiliary member 18.

[0006] Fixed bases 17a are fixed to the upper ends of the pair of movable columns 17, respectively.

On the other hand, the upper ends of the beams 5b are fixed to the lower surfaces of the pair of movable covers 5, respectively, and the lower ends of the beams 5b are connected via connecting rods 19,20. The fixed base 1
The connecting rods 20 and 19 are fitted in the U-shape of 7a and 18a.

When the slide bed 13 is moved while the vehicle is placed on the movable cover 5, the weight of the vehicle is reduced by the receiving portion 8.
a, 8b are added to the fixed beams 7, 21. As described above, one fixed beam 7 is supported by the moving support 11. A receiving base 22 having a slide plate is provided on the auxiliary member 18 so that the slide bed 13 can move while supporting the other fixed beam 21.

[0009]

However, since the cradle 22 moves while supporting the fixed beam in a state where the weight of the vehicle is added on the movable cover, a large frictional force is applied to the cradle and the slide bed is applied. The resistance to movement of the robot becomes excessive.

[0010] Therefore, an object of the present invention is to provide a chassis dynamometer that solves the above problem.

[0011]

According to a first aspect of the present invention, there is provided a chassis dynamometer having a pit cover for forming a pit under a floor and closing the pit to form a floor surface. A slide bed supported in the pit and slidable in a certain direction inside the pit, a moving roller for moving the wheel according to the length of the wheel base of the vehicle is provided on the slide bed, and a moving support on the slide bed is provided. In a chassis dynamometer in which the slide bed can be moved while supporting the fixed beam by the moving column, a rotatable roller is provided at the upper end of the moving column, and the roller fixes the lower surface of the fixed beam. It is characterized in that the fixed beam is supported while rolling.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a chassis dynamometer according to the present invention will be described below. In this embodiment, since a part of the conventional chassis dynamometer is improved, the same parts as those in the related art are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

As shown in FIG. 1, a conventional moving support 16,
Instead of 17, moving columns 26 and 27 of the same length are provided upright on the slide bed 13. As shown in FIG. 4, the upper ends of the pair of movable columns 26 are connected via a connecting plate 28, and a pair of fixing bases 29 having a U-shaped cross section are provided on the connecting plate 28 as shown in FIG. Is fixed. Further, as shown in FIG. 5, the pair of movable columns 27 are similarly configured. The interval between the fixed columns 27 is smaller than the interval between the fixed columns 26.

FIG. 3 shows the movable cover 5 and the shutter 6 upside down. A reinforcing bone 23 is fixed to the moving cover 5 and a beam 24 is fixed, and the beams 24 are connected to each other via a pair of connecting members 25. As shown in FIG. 2, the connecting member 25 enters the U-shape of the pair of fixing bases 29, and the moving cover 5
It will move with 6,27.

Rollers 31 are provided at both ends of the connecting plate 28, respectively. That is, as shown in FIG. 6, a T-shaped pedestal 32 as a bearing member is connected to the connecting plate 2 via bolts.
The pedestal 32 supports a middle portion of a pair of balances 34 via pins 33. A pair of rollers 31 is rotatably provided at both ends of the pair of balances 34.

On the other hand, the roller 3
A track 35 is provided for rolling the abutment 1.

In FIGS. 4 and 5, reference numerals 29 and 32 show only the mounting positions of the fixed base 29 and the pedestal 32.

Next, the operation of the chassis dynamometer will be described. When the slide bed 13 is moved while the vehicle is placed on the movable cover 5, a part of the weight of the vehicle is added to the fixed beam 21 from the movable cover 5 via the receiving portion 8b supporting the inside thereof. For this reason, the fixed beam 21 bends, but the movable columns 26 and 27 move while the pair of rollers 31 abut on the track 35 on the lower surface of the fixed beam 21.

Conventionally, since the pedestal was slidably supported on the fixed beam, it was limited to place a vehicle having an axle load of 2 tons. However, in the present invention, it is possible to place a 4 ton vehicle. It is possible. In addition, because friction resistance is small,
The driving force of the slide bed 13 is small, and the motor capacity of the geared motor can be reduced from 3.7 kW to 2.2 kW.

[0020]

As can be seen from the above description, claim 1
According to the chassis dynamometer according to the present invention, the roller is provided at the upper end of the movable support column that supports the fixed beam while moving while contacting the lower surface, so that the roller rolls on the lower surface of the fixed beam, and slides as in the conventional case. No frictional resistance is applied to the moving support.

Therefore, the capacity of the motor for driving the slide bed can be reduced. Further, the axial load that can be placed on the movable cover and moved can be increased.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a chassis dynamometer according to the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a perspective view as seen from a lower surface of a moving cover and the like.

4A and 4B relate to a moving column in a chassis dynamometer according to the present invention, wherein FIG. 4A is a plan view, FIG.
(C) is a front view.

5A and 5B relate to a moving column in the chassis dynamometer according to the present invention, wherein FIG. 5A is a plan view, FIG.
(C) is a front view.

6 (a) is a plan view, FIG. 6 (b) is a front view, and FIG. 6 (c) relates to a roller in the chassis dynamometer according to the present invention.
Is a right side view.

FIG. 7 is a conceptual diagram of a chassis dynamometer.

8 is a view as viewed in the direction of arrows AA in FIG. 7;

FIG. 9 is a configuration diagram of a conventional chassis dynamometer.

FIG. 10 is a right side view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Moving roller 10a, 10b ... Pit cover 7, 21 ... Fixed beam 13 ... Slide bed 26, 27 ... Moving column 31 ... Roller

Claims (1)

[Claims] A pit cover that forms a pit under the floor and closes the pit to form a floor surface, is supported via a fixed beam, and a slide bed that is slidable in a certain direction inside the pit is provided. A moving roller for moving according to the length of the base is provided on the slide bed, and a moving support is erected on the slide bed, so that the slide bed can be moved while supporting the fixed beam by the moving support. In a chassis dynamometer, a rotatable roller is provided at an upper end of the movable support, and the roller supports the fixed beam while rolling on a lower surface of the fixed beam.