JPH0779549A - Lead connecting device for slip ring of rotating electric machine - Google Patents

Abstract

PURPOSE:To obtain a lead connecting device equipped with a shaft end which can be easily machined, can pass a large current, and has a sufficient strength for a electric rotating machine which requires an overhung slip ring and a shaft end on the slip ring side also. CONSTITUTION:In a lead connecting device constituted of a shaft 1 which is integrally formed with its ends, axial groove 8 formed on the outside diameter side of the shaft 1 near one bearing, lead 4 put in the groove 8, and cylindrical collar 9 which is put on the outside diameter side of the shaft 1 so as to cover the groove 8 and lead 4, the collar 9 is used as a bearing journal and the shaft 1 can be easily machined and has a sufficient strength, since the shaft 1 is integrally formed to its ends. In addition, the lead 4 can be increased in thickness to pass a large current.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slip ring lead connecting device for a rotary electric machine having shaft ends on both sides of the shaft and a slip ring overhanging on one side of the shaft.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing one side of a shaft of a conventional winding type three-phase induction motor. This kind of rotating electric machine has a shaft 1
Both sides of which are supported by bearings 3 and have shaft ends on both sides of shaft 1,
A machine is connected to a shaft end (not shown), and a gear for a cement mill or the like is connected to one shaft end 5. An overhanging slip ring 2 is provided on one side of the shaft 1, a hole is formed in the center of the shaft 1, and the slip ring 2 is passed through this hole 7.
And the winding are connected by a lead 4. At this time, it is necessary to take out the lead 4 from the shaft end side, and the shaft end 5 on the slip ring side is attached to the shaft 1 with a bolt 6 which is different from the shaft 1 of the main body.

[0003]

In the conventional slip ring lead connecting device, the lead 1 is connected to the slip ring 2 by penetrating the center of the shaft 1 and further pulling out from the hole 7 toward the outer diameter side. There was a problem. Since a long hole is formed in the shaft 1, it is costly and time consuming. Since it is a shaft hole, it is not possible to install the lead 4 capable of passing a large current. When the shaft end 5 on the slip ring side is required, a shaft different from the shaft 1 of the main body is mounted due to the processing of the shaft 1, so that the mounting bolt 6 has a problem that the thickness is limited and the strength is not sufficient. .

According to the present invention, a rotating electric machine having an overhanging slip ring on one side of a shaft and requiring a shaft end on the slip ring side is easy to machine and can carry a large current. It is an object of the present invention to provide a lead connecting device having a shaft end with sufficient strength.

[0005]

Both sides of the shaft are supported by bearings, shaft ends are provided on both sides of the shaft, a slip ring is overhung on one side of the shaft, and the slip ring and the winding are connected by leads. In the connected rotating electrical machine, a shaft integrally formed up to the shaft end, an axial groove cut in the vicinity of the one bearing on the outer diameter side of the shaft, and the groove embedded along the groove. The above object is achieved by comprising a lead and a cylindrical collar that covers the groove and the lead and is fitted on the outer diameter side of the shaft and is in contact with the bearing.

If the collar is shrink-fitted on the outer diameter side of the shaft to form a bearing journal, it is suitable for connecting the shaft and the collar.

[0007]

According to the present invention, a groove formed on the outer diameter side in the vicinity of one bearing of the shaft integrally formed to the shaft end, a lead embedded in this groove, and a shaft covering the groove and the lead. Since the lead connecting device is composed of the cylindrical collar fitted on the outer diameter side and the collar is used as a bearing journal, a large current can be passed through the lead and the shaft end is an integral shaft. The slip ring leads can be connected without reducing the shaft strength.

[0008]

1 is a block diagram of a slip ring lead connecting apparatus according to an embodiment of the present invention. 1, the same parts as those in FIG. 2 are designated by the same reference numerals. In FIG.
The shaft 1 is integrally formed up to the shaft end 5, and both sides thereof are supported by bearings. A groove 8 cut on the outer diameter side near one bearing 3 of the shaft 1; a lead 4 embedded along the groove 8;
It comprises a groove 8 and a lead 4 and a cylindrical collar 9 which is shrink-fitted on the outer diameter side of the shaft 1. The collar 9 is the bearing 3 of the shaft 1.
Used as a bearing journal with the surface mounted and machined in the vicinity of. 10 is a lead retainer. By doing so, it is not necessary to machine an elongated hole that penetrates the shaft 1,
It is not necessary to separately attach the shaft end 5, and the shaft end 5 can have sufficient strength. Since the groove 8 is formed on the surface of the shaft 1 in the axial direction, the groove 8 can be widened and the lead 4 can be thickened, so that a large current can be passed through the lead 4.

[0009]

According to the present invention, the lead is embedded along the groove cut on the outer diameter side of the shaft integrally formed up to the shaft end, and the collar covering the groove and the lead is placed on the outer diameter side of the shaft. Since the fitting and the collar are used as the bearing journal, it is easy to process, the shaft end is integrally formed, and the strength is sufficient, and the lead can be thick, so that a large current can be passed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a lead connecting device for a slip ring according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional slip ring lead connecting device.

[Explanation of symbols]

 1 shaft 2 slip ring 3 bearing 4 lead 5 shaft end 6 mounting bolt 7 hole 8 groove 9 collar 10 lead retainer

Claims (2)

[Claims] 1. A rotation in which both sides of a shaft are supported by bearings, shaft ends are provided on both sides of the shaft, a slip ring is overhung on one side of the shaft, and the slip ring and a winding are connected by leads. In an electric machine, a shaft integrally formed up to the shaft end, an axial groove cut near the one bearing on the outer diameter side of the shaft, the lead embedded along the groove, and A lead connecting device for a slip ring of a rotating electric machine, comprising: a cylindrical collar that covers the groove and the lead and is fitted on the outer diameter side of the shaft and is in contact with the bearing. 2. A slip ring lead connecting device for a rotary electric machine according to claim 1, wherein the collar is shrink-fitted on the outer diameter side of the shaft to form a bearing journal. apparatus.