KR100254708B1 - Slot shifter's automatic shifter for vehicle wind tunnel testing - Google Patents

Abstract

PURPOSE: An automatic moving apparatus of slot covers for a wind tunnel test of a vehicle is provided to automatically adjust the position of the slot covers, reduce time required for preparing test, and improve the efficiency of equipments. CONSTITUTION: In a vehicle driving test apparatus including a dynamo meter roll(6) movably installed on a rail installed in underground space(5), a plurality of slot covers(7) are placed to cover an aperture part of the underground space for advancing a test vehicle into the dynamo meter roll, an automatic moving apparatus of slot covers for testing wind tunnel of a vehicle includes a chain(21) fixedly mounting the slot covers and moving with the slot covers pushed by the dynamo meter roll when the dynamo meter roll moves, a chain gear(23) fixedly installed to be forward and backward rotated and engaged with the chain to hang down both end parts of the chain in natural state.

Description

Slot shifter's automatic shifter for vehicle wind tunnel testing

1 is a view showing an embodiment of the slot cover automatic moving device of the present invention.

2 is a schematic perspective view of the in-phase device.

3 to 5 are prior art.

* Explanation of symbols for main parts of the drawings

1: Air duct 2: Test vehicle

3: fan 4: wheels

5: underground space 6: dynamometer roll

7: slot cover 8: support jaw

9: roll support stand 10: rail

20: slot cover automatic transfer device 21: chain

22,23: Front and rear chain gear 24: Chain tip

25: rear of chain 26: space part

[Industrial use]

The present invention relates to an automatic moving device of a slot cover used to enter a vehicle into a dynamo meter roll whose position changes according to a front and rear wheel driving method in an impulse test apparatus of a vehicle. will be.

[Private Technology]

In general, a vehicle that is being tested or manufactured is subjected to various tests in a wind tunnel tester that simulates actual driving conditions.

An example of such a wind tunnel test apparatus is shown in FIGS. 3 to 5, which place the test vehicle 2 in a huge air duct 1 and blow wind that rises in the vehicle speed through the fan 3. Air flow and resistance are measured.

In addition, the vehicle is actually driven for the test. Due to the space limitation, only the wheels 4 are driven, but the vehicle is not actually driven.

In this way, in order for the vehicle to be driven in place, the underground space 5 is provided in the lower part of the vehicle 2, and then the dynamo roller 6 is processed by wheels.

Accordingly, in order to enter the vehicle to the position where the dynamo roller 6 is installed, a block is installed in the upper part of the underground space 5, which is called a slot cover 7 and the slot cover 7 is supported. The plural pieces are placed one after another so as to be placed on the jaw (8), but the part is left empty so that the mother roll (6) protrudes upward and does not interfere.

However, since the test vehicle may be a front wheel drive vehicle or a rear wheel drive, the dynamometer roll 6 may be moved to the front wheel position or the rear wheel position depending on the driving method.

Since the dynamometer roll 6 is supported by the roll support stand 9 and the roll support stand 9 is mounted on the rail 10, the position movement is performed by traveling on the surface of the rail 10 according to the vehicle conditions. Let's do it.

[Problems with Prior Art]

However, in order to move the dynamometer roll 6 in the above-described conventional manner, a large number of slot covers 7 mounted on the upper part of the underground space are lifted out and the roll support stand 9 is moved along the rail 6. After moving, the slot cover (7) should be installed again, but the weight of the slot cover (7-30 ㎏ / piece) and the number (about 60) is a lot of manpower and time is a problem that takes a lot of trouble It is pointed out.

[Problem to Solve Invention]

Accordingly, the present invention has been proposed in view of the above-described problems, and an object thereof is to provide a means for automatically moving a slot cover in conjunction with a dynamometer roll in accordance with a front wheel or a rear wheel drive vehicle.

[Means for solving the invention]

Means of the present invention for achieving the above object

A dynamometer roll installed on the rail installed in the underground space of the wind tunnel test apparatus,

In the vehicle driving test apparatus comprising a plurality of slot covers placed to cover the opening of the upper part of the underground space for entering a test vehicle into the dynamometer roll,

Each slot cover is fixedly mounted, and the chain is pushed together when the dynamometer roll is moved, and is fixedly rotatably installed at the front and rear of the test vehicle, and both ends of the chain extend downward from the natural state. It characterized in that it comprises a chain gear that is engaged with the chain to be lowered down.

EXAMPLE

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

1 is a view showing an embodiment of a slot cover automatic moving apparatus according to the present invention,

2 is a schematic perspective view of the in-phase device.

In the drawings,

The overlapping description and description of the parts described in the prior art examples are omitted, and the same reference numerals are used for the same parts as the prior art examples.

In the figure, reference numeral 20 denotes the slot cover moving device of the present invention. Each of the cover covers 7 and 7 is fixedly mounted to each joint of the chain 21, and the chain 21 is fixed to both sides. In other words, the front and rear chain gears 22 and 23 rotatably installed at the front and rear of the vehicle are engaged with each other, and both ends of the chain 21 are extended down below the chain gears 22 and 23.

In addition, the dynamometer roll 6 protrudes upward through the empty space 26, and the chains 21 are connected to each other by connecting parts formed on both sides of the roll 6, so that the front and rear of the roll 6 are closed. It is continuous.

In other words, the connecting portion has a function of connecting the chain 21 existing in front and rear of the roll (6).

The movement process of the slot cover according to the present invention as described above is as follows.

In the case of the all-wheel drive vehicle of the test vehicle, if the dynamometer roll 6 is located behind the underground space 5, it is moved forward.

The movement method of the dynamometer roll 6 is to push the roll support stand (9) running on the rail 10 or to drive the motor and to force the slot cover (7) in contact with the direction of movement at the same time as the movement. . When the slot cover 7 is pushed by the dynamo roller 6, the entire chain 21 moves while forcibly rotating the chain gears 22 and 23, and the tip 24 of the chain 21 is moved. The down chain 25 is lowered down the front chain gear 22 and the rear end 25 of the chain 21 is raised to reduce the length of the rear chain gear 23.

When the roll 6 reaches the correct position, the position is fixed and the vehicle is driven on the upper surface of the slot cover 7 so that the front wheel is stopped when the front wheel is placed on the roll 6.

When the test is finished, the vehicle is pulled out and the rear wheel drive vehicle is tested again. In the same way, the roll 6 is moved backwards. As the roll 6 moves, the chain 21 is naturally pushed together to move the position. Therefore, it is possible to easily adjust the position regardless of the front and rear vehicles.

[effect]

According to the present invention as described above it is possible to automatically adjust the position by mounting the slot cover fixed to the chain and move together when moving the dynamometer roll down the chain gear, greatly shortening the test preparation time and increase the efficiency of the equipment It will be effective.

Claims (1)

A dynamometer roll movably installed on a rail installed in an underground space of a wind tunnel test device; a plurality of slot covers placed to cover an opening in an upper portion of the underground space for entering a test vehicle into the dynamometer roll; A vehicle driving test apparatus comprising: a chain which is fixedly mounted to each slot cover and moves together with a slot cover which is pushed and moved by a dynamometer roll when the dynamometer roll is moved; A chain gear fixed to the front and rear of the test vehicle to be fixed and reversely rotated by pushing and pulling the chain, and meshed with and engaged with the chain so that both ends of the chain are lowered downward in a natural state; Since the chain is fixedly mounted on the slot cover when the dynamometer roll is pushed and moved, the chain cover is moved so as to drop down under the chain gear in the moving direction while forcibly rotating the chain gear. Shifter.