JPH0571457A - Distributor for internal combustion engine - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the loosening of the rotor shaft fixing part caused by the rotation fluctuation of the engine and to improve the reliability by fixing the distribution rotor to the shaft via the rotor shaft. It is an object. In FIG. 1, a rotational fluctuation of an engine (not shown) is transmitted to a shaft 1, an inertial force acts on a distribution rotor 5 and a rotor shaft 4 that rotate in synchronization with the shaft 1, and a load is applied to a rotor shaft fixing screw 41. . By fixing the power distribution rotor 5 to the shaft 1 via the rotor shaft 4 with the power distribution rotor fixing screw 53, the load can be reduced, so that the rotor shaft fixing screw 41 is prevented from being loosened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributor for an internal combustion engine, and more particularly to a structure of a distributor for an internal combustion engine suitable for reducing a load on a rotor shaft fixing portion due to fluctuations in engine rotation.

[0002]

2. Description of the Related Art In a conventional apparatus, as described in Japanese Patent Application No. 1-268949, a distribution rotor is held on a rotor shaft, so that the inertial force of the distribution rotor and the rotor shaft is reduced by fluctuations in the engine rotation. The structure is such that a load is directly applied to the rotor shaft fixing portion, and no consideration has been given to a structure for preventing loosening of the rotor shaft.

[0003]

The above-mentioned prior art does not consider the structure for reducing the load on the rotor shaft fixing portion due to the fluctuation of the engine rotation and preventing the rotor shaft from loosening. It was due to screw tightening force or pressure input, which supported the inertial force of the distribution rotor and rotor shaft. That is, when the rotational fluctuation of the engine becomes large and the load due to the inertial force between the power distribution rotor and the rotor shaft becomes large, loosening of the rotor shaft fixing portion will occur.

An object of the present invention is to solve the above problems and provide a highly reliable distributor for an internal combustion engine.

[0005]

The above object can be achieved by the following. That is, when the rotor head is fitted and held on the rotor shaft, the above-mentioned object can be achieved by adopting a structure in which the rotor head is fixed to the shaft via the rotor shaft by screwing.

[0006]

With the method of fixing the rotor head fitted to the rotor shaft by screwing and fixing it to the shaft through the rotor shaft, the inertial force of the rotor head is not applied to the rotor shaft fixing portion at all. In addition, the effect of reducing the inertial force of the rotor shaft is also produced. That is, even when the rotational fluctuation of the engine becomes large, no load is applied to the rotor shaft fixing portion, so that the rotor shaft can be prevented from loosening, and the reliability can be improved without impairing the assembly workability. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the shaft 1 is a housing 2
The rotor plate 3, the rotor shaft 4, and the power distribution rotor 5 are attached to the shaft 1 so as to rotate together with the shaft 1. A signal detection device 6 and a power distribution cap 7 are fixed to the housing 2. Here, the shaft 1 rotates in synchronization with the rotation of an engine (not shown), and the rotor plate 3 and the signal detection device 6 generate an appropriate ignition timing signal. The high voltage induced in the ignition coil 8 is transmitted to the center terminal 71 of the power distribution cap 7. This high voltage is transmitted from the carbon point 72 to the electrode 51 of the power distribution rotor 5, is discharged to the gap 52 and the power distribution cap side electrode 73, and the high voltage is applied to the spark plug of each cylinder of the engine (not shown). In FIG. 2, the power distribution rotor 5 fitted to the rotor shaft 4 is connected to the shaft 1 via the rotor shaft 4 by a power distribution rotor fixing screw 53.
The load is applied to the power distribution rotor 5 and the rotor shaft fixing screw 41 due to the inertial force of the rotor shaft due to the rotational fluctuation of the engine (not shown).

FIG. 3 shows another embodiment, which can be similarly carried out even when the rotor shaft 4 is press-fitted into the shaft 1 and the load applied to the press-fitting portion 42 can be reduced.

According to the present embodiment, the rotational fluctuation of the engine (not shown) is synchronized with the rotating shaft, and the distribution rotor rotates in synchronization with the shaft, and the rotor shaft fixing portion is loosened due to the inertial force of the rotor shaft. Can be prevented. As a result, it is possible to prevent a mistake in power distribution of an engine (not shown), so that it is possible to improve reliability without impairing assembly workability.

[0011]

According to the present invention, since the load applied to the rotor shaft fixing portion by the inertial force of the power distribution rotor and the rotor shaft due to the rotation fluctuation of the engine can be reduced, the rotor shaft fixing portion can be prevented from being loosened. it can. Also,
As a result, it is possible to prevent power distribution mistakes in the engine, so that it is possible to improve reliability without impairing assembly workability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the overall shape of a distributor including the present invention.

FIG. 2 is an explanatory diagram of a main part of FIG.

FIG. 3 is an explanatory view of a main part of another embodiment.

[Explanation of symbols] 1 ... Shaft, 2 ... Housing, 3 ... Rotor plate,
4 ... Rotor shaft, 5 ... Distribution rotor, 6 ... Signal detection device, 7 ... Distribution cap.

Claims (1)

[Claims] 1. A distributor housing, a shaft supported by the housing and rotating in synchronization with rotation of an engine, and a signal interrupting plate attached to the shaft and rotating integrally with the shaft to contribute to rotation signal detection. Rotor shaft, power distribution rotor mounted on the rotor shaft and rotating integrally with the shaft, rotor electrodes provided on the power distribution rotor, and a plurality of power distributions formed at predetermined positions in the circumferential direction at positions facing the rotor electrodes. A distributor for an internal combustion engine having a power distribution cap provided with an electrode, wherein the distribution rotor has a structure in which the rotor is directly screwed and fixed to the shaft via the rotor shaft.