JPH10227276A - Ignition device for internal combustion engine - Google Patents

Abstract

(57) [Problem] To provide an ignition device having a bearing structure excellent in productivity by consolidating bearings that support a shaft that rotationally drives an engine and an ignition device in one place. A shaft diameter increasing portion (9) having an increased diameter of one shaft of a shaft press-fitting portion is provided, and dimensions of press-fitting of ball bearings (1) and (2) are defined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ignition device for an internal combustion engine.

[0002]

2. Description of the Related Art A conventional bearing structure of an ignition device is composed of a ball bearing press-fitted and fixed to a lower portion of a shaft which is rotationally driven by the engine in a housing mounted and fixed to the engine, and another ball bearing pressed-fixed to an upper portion of the shaft. It has a bearing structure composed of another housing to be fixed.

[0003]

In the prior art, the upper part of the shaft, in which another ball bearing is press-fitted and fixed to the lower part of the shaft, is press-fitted and fixed to the ball bearing fixed to the housing, and then another housing is inserted from the lower part of the shaft. It is fitted with the housing.

[0004] For this reason, the number of cut portions of the shaft and the two housings increases, and since the two housings are fitted together, the coaxiality with the bearing is important, and the manufacturing cost is high.

It is an object of the present invention to provide a power distributor having a bearing structure in which two ball bearings are connected and fixed to the center of a shaft to reduce the manufacturing costs and facilitate assembly.

[0006]

The two ball bearings are press-fitted and fixed at the center of the shaft.

The two ball bearings are press-fitted and fixed at the center of the shaft and the position of the center of gravity of the rotating body is within the range of press-fitting the ball bearings. .

[0008]

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

The two ball bearings 1 and 2 are press-fitted and fixed to a shaft 3 and rotatably mounted on a housing 4. A coupling 5 and a rotor plate 6 are attached to the shaft 3 and rotate together with the shaft 3.
The signal detection device 7 and the cover 8 are fixed to the housing 4.

By providing the shaft diameter increasing portion 9 in which one shaft diameter of the shaft press fitting portion is increased, the press fitting of the ball bearings 1 and 2 can be dimensioned.

[0011]

According to the present invention, two ball bearings can be press-fitted and fixed to the shaft at the same time, so that the number of man-hours for cutting the shaft and the housing can be reduced, and the assembling can be facilitated. An inexpensive power distributor can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a power distribution device showing an embodiment of the present invention.

[Explanation of symbols]

1, 2 ... ball bearing, 3 ... shaft, 4 ... housing, 5 ... coupling, 6 ... rotor plate, 7 ... signal detection device, 8 ... cover, 9 ... shaft diameter up part.

Claims (1)

[Claims] 1. A housing mounted and fixed to an engine, a shaft supported by the housing and rotatably driven by the engine, press-fitted and fixed to upper and lower portions of the shaft, and fixed to the housing to support a rotating portion. In the bearing of the ignition device for an internal combustion engine composed of two ball bearings, one of the ball bearings press-fitted and fixed to the upper portion of the shaft is arranged at the center of the shaft, and the other ball bearing is attached to the shaft. An ignition device for an internal combustion engine, wherein two ignition devices are connected to a center and fixed to a housing.