JPH0526987Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an environmental test chamber for testing the power of automobiles under temperature, humidity, and atmospheric pressure control.

<Prior art> The environmental test chamber in which the driving simulation of a car is performed is provided with a steel plate 3 on the outer surface of the heat insulating frame 2 that constitutes the test chamber 1, as shown in Figs. 3 and 4, to maintain airtightness within the test chamber. It is designed so that it will be done.

In the test chamber 1, a platform 7 is equipped with a pair of left and right rollers 5 for the front wheels and a pair of left and right rollers 6 for the rear wheels for testing the rotational performance of the wheels of the automobile 4. By starting a vehicle mounted on rollers, the front or rear rollers, or in the case of a four-wheel drive vehicle, both front and rear rollers are rotated, and the rotational force is transferred to the dynamometers 10 and 11 by the roller shafts 8 and 9. We are conducting driving simulation tests on automobiles using this information.

In such a conventional device, the dynamometers 10 and 11 are installed outside the test chamber as shown in FIG. It is sealed with a bearing such as No. 12.

However, some automobiles have different distances between the front and rear wheels depending on the type of vehicle, and in such cases, the distance between the front and rear rollers must be adjusted.

This adjustment is performed by moving one of the adjustment rollers back and forth, but it is not easy to apply a seal structure to the part where the roller shaft passes through the main body to maintain airtightness, and the seal structure for the elongated hole in particular is extremely complicated, resulting in high costs. become.

In the test room, we also conduct performance tests under low pressure conditions, assuming that a car will be driving on a high-altitude mountain road or on a plateau.In such cases, we use an airtight seal structure with a long hole for penetrating the adjustment roller shaft in the frame wall. Not only is this extremely complicated, but it is also difficult to maintain sufficient airtightness and outside air easily enters the test chamber, making it difficult to maintain the test chamber at the required set pressure. The test gives unreliable results.

<Purpose of the present invention> The present invention maintains complete airtightness in the test room.
We have made it possible to provide an environmental testing device that can accurately perform power tests on automobiles under controlled atmospheric pressure.

<Structure of the present invention> The present invention provides an instrument room separated by a partition wall in a test chamber isolated from the outside air, and the shaft of one of the front and rear rollers for simulating driving of a motor vehicle is opened in the partition wall. The shaft of the other roller passes through a slide seal plate that closes a long hole in the front-rear direction made in the partition wall so that it can slide in the front-rear direction, and one end of each of the front and rear roller shafts It is supported by a bearing installed in the test chamber so that it can be moved back and forth, and each other end is connected to a dynamometer that is installed in the instrument room so that it can be moved back and forth.

<Function> By starting the car mounted on the front and rear rollers, the rollers in contact with the driving wheels of the car are rotated, and this rotation is transmitted to the dynamometer by the roller shaft.

Conversely, by driving the dynamometer, its rotational force is transmitted to the roller, and the wheels of the automobile on the roller are rotated.

The dynamometer is located in the instrument room, but the instrument room is located inside the test room, so the test room is completely isolated from the outside air, and the roller shaft through hole in the partition wall between the test room and the instrument room is sealed. It is sufficient to prevent the transfer of heat and humidity, and there is no need to provide a special airtight seal with high precision.

<Example> Figure 1 shows an example of the present invention.
For the same components as in the environmental test chamber of the conventional example shown in FIG. 4, the symbols shown in the conventional example are used.

In the present invention, an instrument room 13 is provided in the test chamber 1, and dynamometers 10 and 11 are installed in this instrument room. It is connected to 10.

Further, the shaft 9 of the roller 6 is connected to the dynamometer 11 by passing through a slide seal plate 26 that closes an elongated hole 16 in the front-rear direction made in the heat-insulating partition wall, and the slide seal plate 26 is connected to the guide rail 27. It is designed to be able to move forward and backward along the

The bearing 17 at one end of one of the roller shafts, for example the rear roller shaft 9, and the dynamometer 11 at the other end can thus be adjusted back and forth over the beds 18, 19, for example.

This movement adjustment mechanism is constructed by screwing screw shafts 20 and 21 into respective threads provided on each bearing 17 and slide legs 17a and 11a of the dynamometer 11, respectively, and each screw shaft 20 and 21 is connected to a bevel gear set 22 and 2.
The bearing 17 and the dynamometer 11 are connected to the drive shaft 24 at 3, and the drive shaft is rotated forward and backward using a manual handle or a motor M to move the bearing 17 and the dynamometer 11 back and forth in synchronization.

In addition, the code|symbol 25 in a figure shows the bearing of each screw shaft 20,21.

In this example, the insulating frame wall 2 of the test chamber 1
The outer surface is covered with an iron plate 3 to completely isolate it from the outside air, and the interior of the room is maintained at a predetermined set atmospheric pressure.

The instrument room 13 in which the dynamometer is installed is located in the test chamber, which is isolated from the outside air by a heat-insulating frame.
The seals for the through holes 15 and 16 formed in the partition wall of the instrument room 13 for the roller shafts may be any seal that can prevent the transfer and leakage of heat and moisture, and airtightness is not strictly required.

Also, one roller shaft 9 passes through a slide seal plate 26 that can slide in the front-rear direction long hole 16 formed in the partition wall 14, so the roller shaft 9 can move within the range of the long hole. can.

By installing rollers and a dynamometer in this way, the distance between the front and rear rollers 5 and 6 can be adjusted using elongated through holes to match the distance between the front and rear wheels, even for vehicle models with different overall lengths, especially 4-wheel drive vehicles. By setting within a range of 16 strokes, it is possible to accurately perform a wheel rotation test of an automobile under a required set atmospheric pressure.

<Effects> As mentioned above, according to the present invention, the shaft hole in the control room wall through which the roller shaft that connects the roller in the test chamber to the dynamometer in the control room passes through is provided with a seal to prevent the transfer of heat and moisture. Since an airtight seal structure that requires high precision is not necessary, the manufacturing cost of the device can be reduced accordingly.

In addition, since one of the rollers and the dynamometer can be moved back and forth, wheel rotation tests of various types of vehicles with different spacing between the front and rear wheels, especially four-wheel drive vehicles, can be accurately performed under a set atmospheric pressure.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view taken along the line - - of Fig. 2 showing an example of the environmental test chamber according to the present invention, Fig. 2 is a cross-sectional plan view thereof, Fig. 3 is a longitudinal sectional front view showing a conventional example, and Fig. 4 is FIG. In the figure, 1...Test room, 2...Structure wall, 3...Iron plate, 4...Car, 5...Front wheel roller, 6...
Rear wheel roller, 8, 9...Roller shaft, 10, 11
... Dynamometer, 12 ... Button, 13 ... Instrument room, 14 ... Partition wall, 15, 16 ... Through hole, 1
7...bearing, 18, 19...bet, 20,21
...Screw shaft, 22, 23...Bevel gear set,
24... Drive shaft, 25... Bearing, 26... Slide seal plate, 27... Guide rail.

Claims (1)

[Scope of utility model registration request] An instrument room separated by a partition wall is provided in a test chamber isolated from the outside air, and the shaft of one of the front and rear rollers for driving simulation of a motor vehicle is passed through a through hole in the partition wall, and the shaft of the other roller is passed through a through hole made in the partition wall. The shaft passes through a slide seal plate that is closed so as to be able to slide back and forth through a long hole drilled in the partition wall in the front and back direction, and one end of each of the front and rear roller shafts is provided so that it can move back and forth inside the test chamber. An environmental test chamber for testing the performance of a motive vehicle, supported by bearings, each other end of which is connected to a dynamometer that can be moved back and forth within the instrument room.