JP2522626Y2 - Mechanical drive of compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to, for example, a compressor in which power from an engine is transmitted to or disconnected from a compressor in an engine supercharger by an electromagnetic clutch. Related to a mechanical drive device.

2. Description of the Related Art As a driving method of a compressor in a supercharger that generates a supercharging pressure to an engine, there is a device that is mechanically driven by power taken out from an output shaft of the engine.

As shown in FIG. 2, one example of this mechanical drive device is as follows.
Two rotors 2 and 3 are arranged in parallel in a compressor main body casing 1 and both ends of the shafts of the rotors 2 and 3 are bearings 4a, 4b and 5a, 5b.
A mechanical drive unit II with a built-in gear is combined with one end of a positive displacement compressor I having a configuration supported by the above, and the two rotors 2 and 3 are rotated by the power taken out from the output shaft of the engine. The mechanical drive unit II
A timing gear 6, 7 attached to and meshed with one of the shaft ends of the two rotors 2 and 3 for transmitting rotational power to the two rotors 2 and 3; A shaft 11 having an end portion and speed-increasing gears 8 and 9 attached to the input shaft 10 built in the gear casing 1a and receiving rotational power from the outside.
And a clutch 12 for connecting and disconnecting the input shaft 10 of the speed-increasing gear 9 and the input shaft 10 of the speed increasing gear 9.
Power from the engine output shaft via a belt 13 and a pulley 14 is applied to a pulley 14 attached to the
9. The compressor I is driven by transmitting it to the rotors 2 and 3 via the timing gears 6 and 7. Reference numeral 15 denotes a bearing that supports the input shaft 10 in the extension 1b of the gear casing 1a.

[Problem to be Solved by the Invention] However, in the case of such a conventional mechanical drive device for a compressor, the electromagnetic coil 12a constituting the electromagnetic clutch 12 is provided on the gear casing 1a side, and the clutch plate is formed by the electromagnetic coil 12a. Since the armature 12c to be attached to and detached from the shaft 12b is arranged on the shaft end side, the pulley 14 receiving the tension of the belt 13 is arranged at the end of the input shaft 10, and an unbalanced load is applied to the bearing 15 supporting the input shaft 10. And the life of the bearing 15 is shortened. In addition, the length of the input shaft 10 is increased and the entire compressor is enlarged.

On the other hand, there is also a type in which the electromagnetic coil 12a is arranged between the pulley 14 and a bearing supporting the pulley 14, but in this case, since the diameter of the pulley 14 becomes large, there is a problem that the pulley ratio cannot be increased.

In view of the above, the present invention allows the input shaft to transmit only the rotational force generated by the external power supplied from the belt, thereby preventing the bearings supporting the input shaft from being overloaded, and shortening the input shaft itself to reduce the shaft system. An object of the present invention is to provide a mechanical drive device for a compressor that can make the overall design easier.

Means for Solving the Problems According to the present invention, in order to achieve the above object, a pulley on which an external power transmission belt is applied is provided on an outer periphery of an input shaft of a power transmission gear built in a gear casing of a compressor. In the mechanical drive device of the compressor, the external power transmitted to the pulley is arranged and transmitted to the input shaft by an electromagnetic clutch including a clutch plate, an armature, and an electromagnetic coil, or is cut off. The pulley is arranged on an outer periphery of an extension of a gear casing that holds a bearing for an input shaft, and a clutch plate of the electromagnetic clutch is fixed to an end of the input shaft so that an armature faces the clutch plate. The electromagnetic coil is attached to the outer side of the pulley, and the electromagnetic coil is arranged on the end side of the input shaft so as to face the armature with the clutch plate interposed therebetween.

[Operation] Since the electromagnetic coil is arranged on the end side of the input shaft and the pulley is arranged on the outer periphery of the gear casing extension, only the rotational force can be transmitted to the input shaft. Therefore, the design of the input shaft system becomes easy and the length of the input shaft itself can be shortened.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In an arrangement similar to the mechanical drive device of the compressor shown in FIG. 2, an extension 1b for holding a bearing 15 for an input shaft 10 in a gear casing 1a. A pulley 14 on which a power transmission belt 13 is hung is provided rotatably via a bearing 16 on the outer periphery of the
An electromagnetic clutch 17 is provided on the outer side of 14, that is, on the side opposite to the gear casing 1a.

The electromagnetic clutch 17 includes an electromagnetic coil 17a, a clutch plate 17b, and a clutch plate 17
An armature 17c attached to and detached from b, the clutch plate 17b is fixed to the end of the input shaft 10, the armature 17c is attached to the outer side of the pulley 14 so as to face the clutch plate 17b, and the electromagnetic coil 17a is mounted. Is disposed on the end side of the input shaft 10 so as to face the armature 17c with the clutch plate 17b interposed therebetween, and the electromagnetic coil 17a is connected to the gear casing 1a
It is configured to be supported by a cover frame 18 protruding from the outside of the cover.

Now, when power is taken out of the output shaft of the engine by the belt 13, the pulley 14 is rotated via the bearing 16. At this time, since the tension applied from the belt 13 side is supported by the extended portion 1b of the gear casing 1a that holds the bearing 15 for the input shaft 10, the tension is applied to the input shaft 10 and the bearing 15 that supports the input shaft 10. It will not work directly. Therefore, the input shaft 10 does not bend due to the tension from the belt 13 side, and an unreasonable force is applied to the bearing 15.
In this state, when the electromagnetic coil 17a is excited, the armature 17 supported on the outside of the pulley 14
Since c is adsorbed to the clutch plate 17b, the rotational force of the pulley 14 is applied to the input shaft via the armature 17c and the clutch plate 17b.
By being transmitted to 10, the input shaft 10 is rotated while being supported by the bearing 15. At this time, since the input shaft 10 simply receives the rotational force from the clutch plate 17b, no bending or the like occurs.

Thus, the electromagnetic coil 17a of the electromagnetic clutch 17 is disposed on the end side of the input shaft 10, and the pulley 14 on which the belt 13 is
The tension from the belt 13 side can be received by the gear casing 1a by arranging it on the outer periphery of the extension 1b of the gear casing 1a that holds the bearing 15 for the input shaft 10. Therefore, it is possible to prevent an unbalanced load from being applied to the bearing 15 and to prolong the life of the bearing 15. Therefore, the input axis
The design of 10 systems becomes easier. Further, as described above, since the electromagnetic coil 17a is arranged on the end side of the input shaft 10, the pulley 1
It is no longer necessary to provide 4 at the end of the input shaft 10 as before,
This can reduce the length of the input shaft 10 itself,
The whole compressor can be reduced in size.

[Effects of the Invention] As described above, according to the mechanical drive device for a compressor of the present invention, a pulley for applying a power transmission belt is arranged on the outer periphery of an extension of a gear casing that holds a bearing for an input shaft. Since the electromagnetic coil of the electromagnetic clutch is arranged at the end of the input shaft, the tension acting from the belt side can be received by the gear casing, and only the rotational force can be transmitted to the input shaft. In addition, it is possible to prevent the bearing supporting the input shaft from being biased and to extend the life of the bearing, thereby simplifying the design of the input shaft system and shortening the length of the input shaft itself. And an excellent effect such as downsizing of the whole compressor can be achieved.

[Brief description of the drawings]

FIG. 1 is a partial view showing an embodiment of a mechanical drive device for a compressor according to the present invention, and FIG. 2 is a schematic diagram showing an example of a mechanical drive device for the compressor. I: positive displacement compressor, II: mechanical drive, 1a: gear casing, 1b: extension, 6, 7, timing gear,
8, 9 ... speed-up gear, 13 ... belt, 14 ... pulley, 15 ...
… Bearing, 17… Electromagnetic clutch, 17a …… Electromagnetic coil, 17b
…… clutch plate, 17c …… armature, 18 …… cover frame.

Claims (1)

(57) [Scope of request for utility model registration] 1. A pulley for applying an external power transmission belt,
The external power transmitted to the pulley is arranged on the outer periphery of the input shaft of the power transmission gear built in the gear casing of the compressor, and is transmitted to the input shaft by an electromagnetic clutch including a clutch plate, an armature, and an electromagnetic coil. In a mechanical drive device for a compressor that is configured to be turned on or off, the pulley is disposed on an outer periphery of an extended portion of a gear casing that holds a bearing for an input shaft, and a clutch plate of the electromagnetic clutch is disposed. A configuration in which the input shaft is fixed to an end of the input shaft, an armature is attached to an outer portion of the pulley so as to face the clutch plate, and an electromagnetic coil is arranged on an end of the input shaft so as to face the armature with the clutch plate interposed therebetween. A mechanical drive device for a compressor, comprising: