JPS6145472Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an improvement of the flywheel device of a chassis dynamometer, and is equipped with a brake.

B. Summary of the invention The present invention is a flywheel device for a chassis dynamometer that is equipped with a brake device so that setting conditions can be changed quickly.

C. Conventional technology Chassis dynamometers conventionally used for automobile testing are designed to keep external conditions as constant as possible.
It is also a device that conducts driving tests by actively creating certain conditions. Instead of a road, a rotating drum is used as an endless flat road, and the drive wheels of a test car are placed on this drum and the vehicle is driven. This allows dynamic testing to be performed.

As shown in Fig. 1, this chassis dynamometer includes a flywheel device connected to the dynamometer via a coupling, and a speed increaser connected to the flywheel device and the coupling. It consists of a roller device with a drum through a coupling. When conducting a test, the flywheel 1 of the flywheel device is appropriately selected using the electromagnetic clutch 2 and attached to and detached from the shaft 3, depending on the equivalent inertia of the test vehicle. This will be explained in detail with reference to a sectional view of a conventional flywheel device shown in FIG. 2. As shown in the figure, the flywheel 1 is supported by a bearing 5 fitted on a pedestal 4, By connecting the boss 1a to the connecting member 7, the movable part 2 of the electromagnetic clutch 2
The spline 2f of the movable portion 2a is connected to the spline 7a of the connecting member 7 by a spline. Further, a limit switch 8 is fixed to the outer periphery of the pedestal 4, and its detection portion 8a
is the flange portion 2b of the movable portion 2a of the electromagnetic clutch 2.
The "on" or "off" state of the electromagnetic clutch 2 is detected by making contact with the electromagnetic clutch 2. Further, splines 2f and 7a are formed at the contact portion between the movable part 2a and the connecting member 7, and a spring 12 is interposed between the splines 2f and 7a and between the movable part 2a and the connecting member 7. . On the other hand, the fixed part 2c of the electromagnetic clutch 2 is fitted into the shaft 3 and is provided so as to face the movable part 2a. In addition, an electromagnet 9 is attached to the back of this fixed part 2c.
is fixed to another pedestal 11 via a mounting member 10.

In the figure, 2d and 2e are teeth of the electromagnetic clutch 2, and 9
a and 9b are lead wires of the electromagnet 9.

When connecting the flywheel 1 to the shaft 3 in such a flywheel device, the electromagnet 9
When the electromagnet 9 is excited through the lead wires 9a and 9b, the movable part 2a of the electromagnetic clutch 2 is attracted to the fixed part 2c of the electromagnetic clutch 2 against the spring 12, and the teeth 2d and 2e mesh with each other. As a result, the splines 2f and 7a of the movable portion 2a of the electromagnetic clutch 2 are integrally connected, and the flywheel 1 rotates together with the shaft 3. On the other hand, when separating the flywheel 1 and the shaft 3, the electromagnet 9 is de-energized and the engaged teeth 2d, 2 of the electromagnetic clutch 2 are removed.
This is done by cutting e with the force of spring 12.

D Problems to be solved by the invention However, in the conventional flywheel device, the flywheel 1 does not have a brake device, and the bearing 5
There is a problem in that it takes a considerable amount of time to stop because it is supported through a.

The present invention aims to eliminate such conventional drawbacks, provide a flywheel device in which a brake is provided on the flywheel, and speed up changes in test conditions.

E Means for Solving the Problems The configuration of the present invention that achieves the above object includes a fixed part having an electromagnet and fixed to a rotating shaft, and a fixed part that is fitted so as to be movable in the axial direction of the rotating shaft, and when the electromagnet is energized. Equipped with an electromagnetic clutch consisting of a movable part,
In a flywheel device for a chassis dynamometer having a flywheel spline-coupled to the movable part via a connecting member, a brake rotating part is attached to the movable part, and the electromagnetic clutch is connected between the movable part and the connecting member. The present invention is characterized in that a spring is provided that is biased to pull the flywheel device apart, and a brake fixing portion is provided on the fixing portion of the flywheel device, and the brake rotating portion is pressed when the movable portion is pulled apart.

F Effect In the above configuration, when the electromagnetic clutch is "disengaged", the movable part is pulled away from the fixed part by the spring force, the brake rotating part attached to the movable part is pressed against the brake fixed part, and the flywheel is braked. .

G. Example Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 3 is a sectional view showing the main parts of an embodiment of the flywheel device for a chassis dynamometer according to the present invention. In the drawings, parts that are the same as those in the prior art are designated by the same numbers.

The flywheel 1 is supported by a bearing 5 fitted on a pedestal 4 provided on a frame (not shown) of the flywheel device, and the boss 1a of the flywheel 1 is connected to a connecting member 7 by a bolt 6. Ru. The connecting member 7 and the movable portion 2a of the electromagnetic clutch 2 are connected by splines 2f and 7a. A spring 12 is interposed in a recess formed in the connecting member 7, and the spring force is applied to draw the movable portion 2a toward the connecting member 7.
Moreover, this movable part 2a has an annular flange part 2b.
is formed in the same manner as before. Also, by coming into contact with this flange portion 2b, the electromagnetic clutch 2 is turned on.
A detection portion 8a of a limit switch 8 that detects "off" is opposed to the limit switch 8, and the limit switch 8 is fixed on the pedestal 4.

Further, the fixing portion 2c of the electromagnetic clutch 2 has the same structure as the conventional one, so a description thereof will be omitted.

With such a structure, the movable part 2 of the electromagnetic clutch 2
Since the flange portion 2b is formed on the pedestal 4 and the spring force of the spring 12 is biased toward the connecting member 7 side, the flange portion 2b is used as a brake rotation portion and is opposed to the flange portion 2b and placed on the pedestal 4. The brake fixing part 13 is fixed. When the electromagnetic clutch 2 is operating, the brake fixing part 1
3 and the flange portion 2b, and if the electromagnetic clutch 2 does not operate, the spring force of the spring 12 will cause the flange portion 2b of the movable portion 2a of the electromagnetic clutch 2 to close.
is strongly pressed against the brake fixing portion 13. In addition, in this embodiment, the brake fixing part 1
Although only one piece 3 is shown, it goes without saying that the braking effect will be increased if multiple pieces are arranged circumferentially, and the installation position of the brake fixing part 13 is not limited to the pedestal, but also on the fixed side of the flywheel device. It is sufficient if the position is in contact with the flange surface of the movable part of the electromagnetic clutch.

In this way, since the flywheel device is provided with a brake fixing part with the flange part 2b of the movable part 2a of the electromagnetic clutch 2 as the brake rotating part, when the current supplied to the lead wires 9a and 9b of the electromagnetic clutch 2 is cut off, the spring 12, the movable portion 2a of the electromagnetic clutch 2 moves toward the connecting member 7, slides on the brake fixing portion 13, and applies a brake to the flywheel 1. Such a brake fixing portion 13 is provided for each flywheel 1, as shown in FIG.

In the embodiment described above, the limit switch for detecting the operation of the electromagnetic clutch is housed in the brake fixing portion, so that the structure can be made compact.

H. Effects of the Invention As described above in detail with the embodiments, according to the present invention, the flywheel is automatically braked and stopped by disengaging the electromagnetic clutch, so that setting conditions can be changed quickly.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of a conventional chassis dynamometer, Fig. 2 is a sectional view showing the main parts of a conventional flywheel device, and Fig. 3 is an embodiment of the flywheel device of the present invention. FIG. 4 is a cross-sectional view showing an extracted main part, and is an overall schematic explanatory view of one embodiment of the flywheel device of the present invention. In the drawings, symbol is a dynamometer, symbol is a flywheel device, symbol is a speed increaser, symbol is a roller device, 1 is a flywheel, 2 is an electromagnetic clutch, 2a is a movable part, 2b is a flange part (brake rotating part), 2c
is a fixed part, 3 is a shaft, 4 is a pedestal, 5 is a bearing,
6 is a bolt, 7 is a connecting member, 8 is a limit switch, 9 is an electromagnet, 10 is a mounting member, 11 is another pedestal, 12 is a spring, and 13 is a brake fixing part.

Claims (1)

[Scope of utility model registration request] An electromagnetic clutch includes a fixed part having an electromagnet and fixed to a rotating shaft, and a movable part fitted movably in the axial direction of the rotating shaft and moved by excitation of the electromagnet, and connected to the movable part via a connecting member. In a flywheel device for a chassis dynamometer having a flywheel connected by splines, a brake rotating portion is attached to the movable portion, and a spring biased to separate the electromagnetic clutch is provided between the movable portion and the connecting member. A flywheel device for a chassis dynamometer, characterized in that a brake fixing portion is provided on the fixing portion of the flywheel device, and the brake rotating portion is pressed when the movable portion is separated.