JPH0923613A - Generator with lubricated vane pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent positional shift due to undue pressure by disposing a resilient stop plate in the axial direction between a driven side bearing and an oil seal and fitting the resilient stop plate, at one end thereof, to the end face at the outer ring part of driven side bearing and, at the opposite end thereof, to the end face of oil seal. SOLUTION: A vacuum pump 9 is coupled directly with a generator and the shaft 10 of rotor 4 thereof is coupled with the rotor 9a of vacuum pump 9 through a spline 10a. A driven side bearing 7 for the rotor 4 and an oil seal 8 for sealing the generator and the vacuum pump 9 are set in a bracket 6. A resilient stop plate 11 is disposed in the axial direction between the oil seal 8 and the driven side bearing 7 and fitted, at one end thereof, to the end face at the outer ring part of driven side bearing 7 and, at the opposite end thereof, to the end face of oil seal 8. This structure prevents leakage of lubricant due to positional shift caused by an undue pressure of the oil seal 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine for an automobile, and more particularly to a rotating machine suitable for a lubricating oil sealing structure.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Publication No. 63-11878, a conventional lubricating oil sealing structure is a through hole for discharging lubricating oil leaking from an oil seal to the outside of the rotating machine body. The method by the combination with is proposed.

[0003]

The above-mentioned prior art is a secondary treatment method for lubricating oil leaked from an oil seal.
No method has been taken to prevent the displacement of the oil seal, which is the main cause of leakage.

An object of the present invention is to prevent the displacement of the oil seal due to excessive pressure by fixing the movement of the oil seal.
An object is to provide a highly reliable rotating machine that reduces oil leakage.

[0005]

In order to achieve the above object, the present invention provides an elastic locking plate between the bearing and the oil seal in the axial direction so that the oil seal can be pushed from the pump side.
The elastic locking plate and bearing are designed to withstand.

[0006]

The elastic locking plate is fixed by pushing one end from the outer ring of the bearing to deform the other end by the spring action and pushing the end face of the oil seal.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a cross-sectional view of an example in which a vacuum pump (hereinafter referred to as VP) is directly connected to a generator.
Is the shaft 10 of the rotor 4 of the generator and the rotor 9a of the VP 9.
And are connected by a spline 10a.

A bearing 7 for receiving the rotor 4, a generator and a VP 9
An oil seal 8 that seals is installed inside the bracket 6. Further, in order to increase the holding force of the oil seal 8, there is a triangular groove (not shown) on the inner peripheral portion of the box portion of the bracket 6 for preventing the oil seal 8 from coming off (displacement). The oil seal 8 is adapted to withstand the lubricating oil pressure due to its holding force. The lubricating oil flows in the direction of the arrow, and engine oil is mainly used.

With this structure, the pressure applied from the VP 9 to the oil seal 8 during rotation is low because the lubricating oil flows, but when the rotation is stopped, for example, the engine power is transmitted to the generator to drive the generator. When a driving belt (not shown) is loosened and a failure such as breakage occurs, the lubricating oil pressure is applied but the rotation of the VP 9 is rarely stopped. In this case, the lubricating oil pressure is directly applied to the oil seal 8, the position of the oil seal 8 is displaced, and finally the lubricating oil leaks from the oil seal 8.

Therefore, as in this embodiment, an elastic locking plate 11 is provided between the bearing 7 and the oil seal 8 in the axial direction, and the bearing 7
The oil seal 8 is fixed by pushing the oil seal 8 by applying a force from the elastic force, and the displacement of the oil seal 8 can be completely prevented.

2 and 3 show the elastic locking plate 11. The outer circumference of the disk is bent into a U-shape 11a, the terminal is provided with a convex portion 11b in contact with the outer ring of the bearing 7, and the inner circumference is provided with a through hole 11c.
The terminal 11d is slightly bent on the side opposite to the convex portion 11b. 1
1e is a notch for adjusting the spring force. A force is applied from the outer ring of the bearing 7 to the convex portion 11b, and the U-shaped portion 11a bends to generate a spring force.

According to this embodiment, even in the case where the rotation of the VP 9 is stopped due to the belt failure, the elastic locking plate 11 for supporting the oil seal 8 in the axial direction is provided to cause the displacement of the oil seal 8. The lubricating oil can be prevented from leaking, which has the effect of improving reliability. Also, the oil seal 8
It becomes possible to abolish the triangular groove for improving the holding power, and there is also an effect of cost reduction by abolishing the processing process.

[0014]

According to the present invention, even if a case where the lubricating oil pressure is directly applied to the oil seal occurs while the VP rotation is stopped, by providing the elastic locking plate that axially supports the oil seal, It is possible to prevent the lubricating oil from leaking due to the displacement of the seal.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a perspective view of an elastic locking plate.

FIG. 3 is a vertical sectional view of an elastic locking plate.

[Explanation of symbols]

1 ... Pulley, 2 ... Fan, 3 ... Stator, 4 ... Rotor, 5
... semiconductor, 6 ... bracket, 7 ... bearing, 8 ... oil seal, 9 ... vacuum pump, 9a ... rotor, 10 ... shaft,
10a ... Spline, 11 ... Elastic locking plate.

Claims (2)

[Claims] 1. A mechanism in which one end of a shaft of a rotor is extended to a non-driving side of a generator and a lubricating vane pump is directly connected, and an oil seal is arranged with a gap between a bracket of a non-driving side bearing and a rotating shaft. And an elastic locking plate is provided in the axial direction between the anti-drive side bearing and the oil seal, and one end of the elastic locking plate is an outer ring end surface of the anti-drive side bearing,
A generator with a lubricated vane pump, characterized in that the other end is fitted to the end face of the oil seal. 2. A generator with a lubrication vane pump according to claim 1, wherein the elastic locking plate is shaped such that the outer circumference of the disk is bent in a U shape and the inner circumference is bent in the direction opposite to the U shape.