JPH0443803Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to a chassis dynamometer, and is useful when applied to a chassis dynamometer of the type in which a bed equipped with rollers, etc. moves in accordance with the wheelbase of a vehicle. be.

B. Summary of the invention This invention uses the rotational force of a rotating shaft to synchronize the movement of a first bed in which a power absorption device and a flywheel are installed, and a second bed in which a roller is installed. This is a chassis dynamometer in which a moving device for moving the bed is installed in a first bed and a second bed, respectively.

C. Prior Art A chassis dynamometer is used to carry out various dynamic tests by placing the wheels of an automobile on rollers and driving the automobile. In this test, a load (running resistance) is applied to the rollers so that the state approximates as much as possible the state in which the vehicle travels on an actual road. In addition, the environment in the test room has been prepared to match the actual weather environment. Furthermore, in chassis dynamometers for four-wheel drive vehicles, the distance between the front and rear rollers can be adjusted to match the wheelbase of the test vehicle.

Here, a conventional chassis dynamometer will be explained. FIG. 3 shows a conventional chassis dynamometer, and FIG. 4 shows a conventional chassis dynamometer together with its building. As shown in both figures, there are a test room 1 and an observation room 2 on the first floor above ground of the building, and a machine room 3 and a roller room 4 on the semi-basement. Of these, the test chamber 1 is surrounded by a concrete wall 5, and the environment within the test chamber 1 is adjusted. An observation window (not shown) is formed in the concrete wall 5, and the inside of the test chamber 1 can be observed from the observation chamber 2 through the observation window. Further, an opening 5a is formed in the semi-underground portion of the concrete wall 5, and a slide wall 6 is slidably provided in the opening 5a. This slide wall 6 slides in a direction perpendicular to the paper plane of FIG. 4, and always closes the opening 5a while sliding. Therefore, the machine room 3 and the roller room 4 are thermally and acoustically isolated by the concrete wall 5 and the slide wall 6.

A bed 8 that slides on a slide rail 7 is provided in the machine room 3, and a flywheel 9 and a power absorption device 1 are mounted on the bed 8.
0 is set. The flywheel 9 generates equivalent inertia equivalent to the weight of the test vehicle, and the power absorption device 10 (dynamometer, etc.) generates a load equivalent to running resistance. Furthermore, the bed 8 is equipped with a drive motor 11, a chain 12, and a pin gear 13, and the pin gear 13 is engaged with a biting rail 14 installed below the bed 8. Therefore, the bed 8 is moved by driving the drive motor 11.

A bed 16 that slides on a slide rail 15 is provided in the roller chamber 4, and a roller 17 is installed on the bed 16.
The top of the roller 17 is flush with the floor of the test chamber 1, and the wheels of the test vehicle are placed on this roller 17.
Furthermore, the bed 16 is equipped with a drive motor 18, a chain 19, and a pin gear 20, and the pin gear 20 engages with a biting rail 21 installed below the bed 16. Therefore, the bed 16 is moved by driving the drive motor 18.

The flywheel 9, the power absorption device 10, and the roller 17 are provided on the same rotating shaft 22 passing through the slide wall 6. Further, the bed 8 and the bed 16 are connected by a thick and highly rigid connecting frame 23 that passes through the slide wall 6.
This connecting frame 23 functions to move the beds 8 and 16 in synchronization even if the synchronous rotations of the drive motors 7 and 18 are out of sync.

D Problems to be solved by the invention By the way, the above-mentioned prior art had the following problems.

() To move the beds 8, 16, separate drive motors 11, 18 are required.

() Since the thick connecting frame 23 penetrates the slide wall 6, the structure becomes complicated.

() In order to thermally and acoustically isolate the machine room 3 and the roller room 4, it is necessary to provide heat and sound insulating sleeves not only for the rotating shaft 22 but also for the connecting frame 23, which complicates the structure and increases cost. This will lead to a rise in prices.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a chassis dynamometer with a simple structure that eliminates the need for a drive motor and a connecting frame while ensuring synchronous movement of two beds.

E. Means for Solving the Problems The configuration of the present invention that achieves the above object is that the power absorption device, the flywheel, and the roller are provided on the same rotating shaft, and the power absorption device and the flywheel are installed on the same rotating shaft. A chassis dynamometer in which a first bed with a raised bed and a second bed with a roller mounted thereon move according to a wheel base of a test vehicle, comprising: a rotary drive means for rotating the rotating shaft; A wrap transmission device comprising an endless strip suspended between a wheel provided on a wheel and the rotating shaft, a clutch means for connecting and disconnecting rotational force transmitted from the wheel of the wrap transmission device, and a clutch means comprising the clutch means. a first moving device configured with a moving mechanism that moves the first bed by a rotational force transmitted through the second bed; an endless strip suspended between a wheel provided on the second bed and the rotating shaft; A wrap transmission device, a clutch means for connecting and disconnecting the rotational force transmitted from a wheel of the wrap transmission device, and a moving mechanism for moving a second bed by the rotational force transmitted via the clutch means. and a second moving device configured with.

F. Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the same parts as those in the prior art are given the same numbers.

FIG. 1 is a perspective view showing an embodiment of the present invention.
As shown in the figure, a bed 8 that slides on a slide rail 7 is equipped with a flywheel 9 and a power absorption device 50. In this embodiment, the power absorption device 50 is one capable of rotary drive operation;
Specifically, we use DC dynamometers, flex dynamometers (AC variable frequency induction motor type dynamometers: product name), DC generators, etc.
Further, the bed 16 that slides on the slide rail 15 is provided with rollers 17. The power absorbing device 50, flywheel 9, and roller 17 are installed on the rotating shaft 22. Note that the first
Although not shown in the figure, the rotating shaft 22 passes through the slide wall.

Furthermore, in this embodiment, a moving device 100 is installed in the bed 8.
However, a moving device 200 is installed in the bed 16. Both moving devices 100, 200 are assembled from the same components. So the second
The mobile devices 100 and 200 will be explained together with reference to the drawings. The beds 8 and 16 have bearings 101,
Chain gears 102, 202 are installed via 201, and chain gears 103, 203 are fixedly installed on the rotating shaft 22.
Chains 104, 204 are suspended between the chains 104, 203, and a chain transmission device is constructed. Said chain gear 1
The rotational force outputted from
is transmitted to. The rotational force output from the reducer 106, 206 is transmitted to the chain gear 107, 2 which is a moving mechanism.
07, chain 108, 208 and chain gear 10
9,209 and further transmitted to pin gears 110,210. The pin gears 110 and 210 are engaged with the engagement rails 14 and 21, respectively. In addition, locking bars are horizontally suspended in the upper surface opening grooves of the biting rails 14 and 21 at predetermined intervals along the longitudinal direction, and the pins of the pin gears 110 and 210 are engaged with the locking bars. There is.

Next, the operation of this embodiment will be explained. Bed 8,1
6, electromagnetic clutches 105, 20
5 is connected, and the power absorbing device 50 is further driven to rotate the rotating shaft 22. Then, the moving device 100 moves the bed 8 by rotating the pin gear 110 in response to the rotational force of the rotating shaft 22.
The bed 16 is moved by rotating the pin gear 210 in response to the rotational force. In this case, since the configurations of moving device 100 and moving device 200 are the same, the moving speeds of bed 8 and bed 16 are equal.

When the movement is completed, the driving operation of the power absorbing device 50 is stopped and the electromagnetic clutches 105, 205 are placed in a disconnected state. Furthermore, the test is started after the beds 8 and 16 are locked by a locking device (not shown).

Although the above embodiment uses a power absorbing device 50 that can be driven, a chassis dynamometer that uses a power absorbing device that cannot be driven may be provided with a separate motor on the rotating shaft.

G. Effects of the invention As specifically explained above in conjunction with the embodiments, according to the invention, the bed on the power absorbing device side and the bed on the roller side are each equipped with a moving device whose driving source is the rotational force of the rotating shaft. , both beds can be moved synchronously. As a result, the following effects are obtained.

() There is no need to provide separate drive motors for both beds, simplifying the structure.

() Since no connecting frame is required, the configuration can be further simplified.

() Since only the rotating shaft passes through the sliding wall, the heat and sound insulation structure of the sliding wall becomes simple.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a configuration diagram showing a moving device, Fig. 3 is a perspective view showing a conventional chassis dynamometer, and Fig. 4 is a conventional chassis dynamometer. It is a configuration diagram showing the building together with the building. In the drawing, 5 is a concrete wall, 6 is a slide wall, 7 and 15 are slide rails, 8 and 16 are beds, 9 is a flywheel, 10 and 50 are power absorption devices, 14 and 21 are biting rails, and 17 is a roller. ,
22 is a rotating shaft, 23 is a connecting frame, 100, 200 is a moving device, 101, 201 is a bearing, 102, 20
2 is a chain gear, 103, 203 is a chain gear, 104,
204 is a chain, 105, 205 is an electromagnetic clutch, 106, 206 is a reducer, 107, 207 is a chain gear, 108, 208 is a chain, 109, 2
09 is a chain gear, and 110 and 210 are pin gears.

Claims (1)

[Claims for Utility Model Registration] (1) A power absorption device, a flywheel, and a roller are provided on the same rotating shaft, and a first motor on which the power absorption device and the flywheel are installed;
A chassis dynamometer in which a bed of the bed and a second bed on which the roller is installed move according to the wheel base of the test vehicle, comprising: a rotary drive means for rotating the rotary shaft; and a wheel provided on the first bed. a wrap-around transmission comprising an endless strip suspended between the wheel and the rotating shaft; a clutch means for connecting and disconnecting the rotational force transmitted from the wheel of the wrap-around transmission; a first moving device configured with a moving mechanism that moves a first bed using a rotational force; and a wrap-around transmission comprising an endless strip suspended between a wheel provided on a second bed and the rotating shaft. A second bed comprising a device, a clutch means for connecting/disconnecting the rotational force transmitted from the wheel of the wrap transmission, and a moving mechanism for moving the second bed by the rotational force transmitted via the clutch means. 2. A palm dynamometer characterized by comprising a moving device. (2) Utility Model Registration The chassis dynamometer according to claim 1, characterized in that the rotational drive means is the power absorption device itself. (3) Utility Model Registration The chassis dynamometer according to claim 1, wherein the rotational drive means is a motor separately provided on a rotating shaft.