JPS61224287A - Rotary type power supply unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary power supply device for supplying electric power (including electrical signals) to a rotating body that is performing rotational motion.

BACKGROUND OF THE INVENTION Conventionally, brushes have been used exclusively for transmitting electric power or electrical signals to rotating machines such as wound-wound electric motors and DC motors, and rotating bodies such as slip rings.

Problems to be Solved by the Invention In such a conventional configuration, the lifespan of the brushes is too short compared to the lifespan of the rotating body, so the problem is that the brushes must be replaced frequently.

The present invention solves these problems and aims to provide a rotary power supply device that can be manufactured simply and at low cost without having to be replaced for a long period of time.

Means for Solving the Problem In order to solve this problem, the present invention inserts a rolling bearing via an insulator between the shaft that rotates relatively and the boss on the rotating body side. The structure is such that power is supplied to the rotating body through this rolling bearing.

Effect: With this configuration, electric power or electrical signals are supplied to the rotating body via the rolling bearing during rotation.

EXAMPLE Hereinafter, an example of the present invention will be explained based on the present invention.

In the figure, 1 is a boss of a rotating body, 2 is an insulator inserted into the boss 1, and a rolling bearing 4 (hereinafter referred to as a bearing) is inserted into this insulator 2 via an insulator spacer 3. . Reference numeral 5 denotes shirts 1 to 5, which are fitted into the bearing 4 and are made of an insulating material. A contact piece 6 is incorporated in the portion of the shaft 5 that contacts the bearing 4. One of the contact pieces 6 contacts the inner ring 7 of the bearing 4, and a lead wire 8 is connected to the other. It passes through the inside of the shaft 5 and is guided to the outside. Similarly, a contact piece 10 is also incorporated in a portion of the insulator 2 that contacts the outer ring 9 of the bearing 4, and a lead wire 11 connected to the contact piece 10 is guided to the outside of the boss 1. 12 is a bearing holder made of insulating material,
It is attached to the boss 1 with bolts 13 G-J. 14 is a ball of the bearing 4.

In the above configuration, assuming that the boss 1, which is part of the rotating body, rotates and the shaft 5 is stationary, the inner ring 7 and outer ring 9 of the bearing 4 are electrically connected to each other by the balls 14 or rollers even during rotation. Because they are electrically conductive, the lead wire 8 on the shaft 5 side, which is connected to the inner ring 7 via the contact piece 6, and the outer ring 9
The lead wire 11 on the boss 1 side, which is connected to the
By passing a current through 1, electric power or an electric signal can be supplied to the rotating body from the stationary shaft side. Of course, it goes without saying that the same effect can be achieved even when the boss 1 side is stationary and the shaft b side is rotating.

In the embodiment shown in the drawings, a grease-filled ball bearing is used as the rolling bearing 4, but it is also possible to use a lubricated roller bearing, an upper bearing, etc. as appropriate depending on the usage conditions. No problem. Also, regarding the Jj method of connecting the bearing 4 and the power wires 8 and 11, it is not limited to the contact piece 6.10, but also the magnitude of the current,
If you choose the most suitable one depending on the voltage and other conditions, you will be disappointed.

Effects of the Invention As described above, according to this invention, a rolling bearing is inserted between a shaft and a boss that rotate relative to each other through an insulator, and power is supplied to a rotating body through this rolling bearing. (
Since the present invention attempts to supply electrical signals (including electrical signals), it is possible to provide a rotary power supply device that has a significantly longer life than the conventional brush type, is simpler and cheaper, and has great effects.

[Brief explanation of drawings]

The drawing is a sectional view of a rotary power supply device according to an embodiment of the present invention.

Claims (1)

[Claims] 1. A rotary electric power system in which a rolling bearing is inserted through an insulator between a shaft that performs relative rotational motion and a boss on the rotating body side, and power is supplied to the rotating body through this rolling bearing. Feeding device.