JPS6315794Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chassis dynamometer which is a dynamic test device for automobiles, and particularly relates to the structure of the floor plate of a chassis dynamometer for both front wheel drive and rear wheel drive.

In a chassis dynamometer, either the front or rear wheels of a car are placed on a rotatable or rotationally driven drum, and driving the wheels on the drum reproduces the driving conditions. Various dynamic tests are performed. If one chassis dynamometer is to be used for testing both front-wheel drive and rear-wheel drive vehicles, the drum should be placed at both the front and rear wheel positions of the vehicle set on the chassis dynamometer. It must be able to be moved to any position.

New Automotive Engineering Handbook, 6th edition, 14-29,
pp. 14-30, Tosho Publishing Co., Ltd., March 25, 1978.
Conventionally, the drum and its drive device were stored in a pit 9 in a factory as shown in Figure 7.
The floor plate 7 on which the car to be tested is placed is at the same level as the factory floor surface 8 and covers the pit, exposing the drum on a part of the floor plate. A gap is created for this purpose.

Fig. 1 shows the central part of a conventional floor plate device, which consists of a number of divided removable plates arranged between a pair of fixed floor plates 1 and 2 spaced apart from each other in the front-rear direction. It is made up of floorboard small pieces 3 laid out in a row. If you try to move the drum 4 from position 5 on either the front or rear wheel to position 6 on the other, the upper part of the drum 4 and the small floorboard piece 3 are on the same level and will interfere with each other, so first move the small floorboard piece 3. 3 must be removed, and then the drum 4 must be moved back and forth.

However, even if the floorboard is divided into small pieces, each piece still has a considerable weight, and each time the floorboard small piece 3 is removed and the drum 4 of the dynamometer is moved back and forth, the floorboard is placed again in the specified position. Laying them out in the same position required a lot of effort and time.

The present invention can perform this operation with one touch using power, in order to reduce the great amount of labor and time in processing this floorboard. The purpose of the present invention is to provide a floorboard device that is safe and can be operated for a short period of time, and also has a function as a protective shelf to prevent people from approaching the drum in which a part of the floorboard rotates. The purpose is also to

The front wheel drive of the present invention to achieve this purpose,
The floor plate device for the rear-wheel drive chassis dynamometer divides the floor plate within the movement range of the chassis dynamometer into multiple parts, and each floor plate can stand up at right angles or fall down horizontally. It is configured as a movable floor plate. A drive mechanism for raising and lowering the movable floor plate is connected to the movable floor plate.

The operation of the above device is as follows. In other words, the drum is moved to the front wheel side when the front wheels of the vehicle to be tested are driven, and to the rear wheel side when the rear wheels are driven, but when the drum is moved, the movable floor plate located in front of the moving direction is moved. is erected in a direction perpendicular to the horizontal direction by a drive mechanism, and after the movement of the drum is completed, the movable floor plate located at the rear in the direction in which the drum has moved is leveled by the drive mechanism. After the drum has moved, the movable floor plate at the drum stop position remains upright and is used as a protective shelf.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows the device of this example. In the figure, the side B from the center line A-A of the test device shows the state in which the drum is set to the rear for rear wheel drive.
The side C from the center line A-A shows a state in which the drum is being moved forward for front wheel drive. The drum 11 is arranged in a pit formed in a factory, and the upper end of the drum 11 is at the same level as the factory floor and the upper surface of the floor plate device. The drum 11 is movable back and forth on the surface plate 13,
It is moved by a drive device (not shown), and can be locked at a position directly below the front or rear wheels of the vehicle when the vehicle to be tested is set on the chassis dynamometer. drum 11
can also be rotationally driven by another rotational drive device (not shown).

The floorboard device includes fixed floorboards 14 and 15 arranged on the pit at intervals in the front and back direction, and movable floorboards 16 and 1 interposed between the fixed floorboards 14 and 15.
It consists of 7 and 18. The movable floor plate is composed of a plurality of floor plates, including a floor plate 16 corresponding to the front wheels of the automobile to be tested, a floor plate 18 corresponding to the rear wheels, and at least one floor plate 17 corresponding to other parts. .

Although FIG. 3 shows only the floor plate device taken out, the drum 11 moves within the range of movable floor plates 16, 17, and 18, as shown in FIG.

Each of the movable floor plates 16, 17, 18 is connected to the drum 11.
The movable floor plates 16, 17, and 18 are rotatably supported so that they can fall down horizontally or stand up at right angles thereto at a position directly above the movement of the outer end in the axial direction. In FIG. 3, on the B side of the center line A-A, the movable floors 16 and 17 have fallen down, and the movable floor plate 1
8 is standing up, on the C side from the center line A-A, the movable floorboard 16 is upright and the movable floorboard 1
7 and 18 are shown lying down.

The rotational drive of the movable floor plates 16, 17, and 18 is carried out between the above-mentioned upright position and the collapsed position.
6, 17, and 18 may be used, but for example, as shown in FIG. As shown in FIG. 5, it may be a combination structure of a worm 24 rotating around an axis 23 and a worm wheel 25 fixed to the floorboard side, or as shown in FIG. Rotationally driven pulley 2
The movable floor plates 16, 17, and 18 may be rotated by a rope 27 wound around the movable floor plates 16, 17, and 18.

Next, the operation of the device having the above configuration will be explained. The side B from the center line A-A in FIG. 2 shows the case where the chassis dynamometer is set for testing a rear-wheel drive vehicle. At this time, the car moves on the floorboard and the front wheels are on the movable floorboard 16.
The rear wheels are placed on the drum 11, and in this state the vehicle is tested for running. In this case, the movable floor plate 18 remains upright and functions as a protective shelf to prevent people from approaching the drum 11 and tires.

Next, when resetting the chassis dynamometer for a front-wheel drive vehicle, move the movable floor plates 16, 17, 18 as shown on the C side from the center line A-A in FIG.
After all of the drums are erected and the drum 11 is prevented from interfering with the floorboard within the movement range of the drum 11, the drum 11 is moved from the rear wheel position to the front wheel position. Thereafter, the movable floor plates 17 and 18 are brought down to the horizontal position, leaving only the movable floor plate 16 erect.
Subsequently, the vehicle to be tested is brought in, the front wheels are set on the drum 11, the rear wheels are placed on the movable floor plate 18, and a driving test is carried out with the vehicle locked. In this case, the movable floorboard 16 functions as a protective shelf.

Since the floor plate device of the chassis dynamometer for both front wheel drive and rear wheel drive according to the present invention is as described above, the following various effects can be obtained according to the present invention.

First, with the conventional split floor system, all floorboard pieces must be removed and set up manually.
The work is heavy and dangerous as it involves climbing up the pit, but with the method of this invention, the floorboards can be rotated and set quickly with one touch, improving work efficiency and safety. can.

In addition, when conventional split-type floorboards are laid out side by side, the surface tends to be uneven, making it difficult to walk on, and there are gaps that allow dirt and dust to easily get into the pit, but this method has these problems because it is integrated. does not occur.

In addition, there is no need to divide the movable floor plate into many small pieces as in the past, and it can essentially be divided into three parts: the part corresponding to the front wheels, the part corresponding to the rear wheels, and the other parts. , each part is more integrated than conventional small pieces, which is advantageous in terms of strength and rigidity, and allows for substantial weight reduction.

Furthermore, the movable floorboard of the present invention also functions as a protective shelf to prevent people from getting close to the drum and wheels.
There is no need to provide a special protective shelf, which contributes to parts savings and cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the floor plate structure of a conventional chassis dynamometer, Fig. 2 is a perspective view of a floor plate device of a chassis dynamometer for both front wheel drive and rear wheel drive according to the positional embodiment of the present invention, and Fig. 3 is a perspective view showing only the floorboard in FIG. 2, FIG. 4 is a front view showing an example of the position of the drive mechanism for the movable floorboard, and FIG. 5 is a front view showing another example of the drive mechanism for the movable floorboard. , FIG. 6 is a front view showing yet another example of a drive mechanism for a movable floor plate, and FIG. 7 is a perspective view of the overall structure of a conventional chassis dynamometer. The meanings of the main symbols in the figure are as follows. 11...Drum, 12...Floor plate device, 14,1
5, 19... Fixed floor plate, 16, 17, 18... Movable floor plate.

Claims (1)

[Scope of utility model registration request] The floorboard within the movement range of the drum of the chassis dynamometer is divided into multiple parts in the direction of drum movement, and each floorboard is erected at a position directly above the outer end of the drum, with the floorboard standing at right angles to the horizontal position. A front-wheel drive, characterized in that the movable floor plate is rotatably pivoted so that it can be raised and lowered between two positions, and a drive mechanism for raising and lowering the movable floor plate is connected to the movable floor plate. Floor plate device for rear wheel drive chassis dynamometer.