JPS5963367A - Ignition distributor for internal-combustion engine - Google Patents

Abstract

PURPOSE:To enable a bearing to be eliminated from a sliding member, by interposing a press fit member between a bearing member, for absorbing gear backlash of a distributor, and a spring holding member and introducing engine oil to the periphery of said press fit member. CONSTITUTION:A spring 6, together with a spring holding member 8, is inserted between a shaft 2 and a housing 1, and an annular press fit member 7, having an external diameter smaller than the internal diameter of the housing 1, is press fitted to the shaft 2 in prescribed dimensions. Further a bearing member 4c is press fitted to the internal periphery of the housing 1 in prescribed dimensions. Holes 1b, 1c for engine oil are provided in the housing 1 in the periphery of the press fit member 7, allowing the engine oil to flow also in a clearance between the shaft 2 and the bearing member 4c. In this way, a sliding part, being sufficiently lubricated with the engine oil, is obtained at a profitable cost with excellent durability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ignition distributor for an internal combustion engine for eliminating variations in ignition timing.

Conventionally, mechanical play in various parts of a power distributor and an engine has been shaken by engine vibration, causing variations in ignition timing. (Play refers to shaft thrust play, gear backlash, etc.)

Conventionally, a spring has been inserted in the shaft to absorb thrust backlash, and by applying a certain amount of torque to the shaft, it has also absorbed gear vibration so that the ignition can be stably ignited at the optimal ignition timing. It was being done.

FIG. 1 shows an example of a conventional configuration. Pass the ball bearing 10 through the shaft 2 and fix it with the screws 1 and 5b. The shirt l-2 is held in the housing 1 by the bearing member 4 and the ball ring outer ring portion tOa. Further, the shaft 2 is prevented from falling off from the housing 1 by the washer 5a. The spring 6 is inserted between the spring holding member 8 and the gear 3 so as to apply a predetermined load. According to this method, the load due to )<6 has rolling parts and sliding parts at two locations: (1) the ball contact part in the ball bearing, and (2) the bearing member 4 and the spring holding member 8. Regarding the sliding part (■), engine mail is sufficiently advantageous in terms of durability (IF4 m) and wear (ii), but the sliding part is durable due to the use of ball bearings. ! [
Although this method is sufficient, it has the disadvantage of high cost.

In order to solve the above-mentioned drawbacks, the present invention supports the shaft in the housing by a sliding bearing member, and also includes a press-fitted member press-fitted into the shaft between the sliding bearing member and the spring holding member of the internal combustion engine drive unit. By making both sides of this press-fit member a sliding part that receives the thrust load of the spring, and by guiding the engine mail around this press-fit member, an inexpensive sliding bearing that does not use ball hair rings can be created. The object of the present invention is to be able to receive thrust charging at a portion of the housing to which engine mail is supplied, and to provide sufficient durability.

The present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 2 and 3, a housing 1 rotatably supports a shaft 2 via sliding bearing members (oil-less metal) 4a and 4c. 3 is a gear fixed to the shaft 2, and the shaft 2 is driven via the gear 3 from a camshaft which is an internal combustion engine driving section. Also, when the ignition distributor is installed on the internal combustion engine, the gear 3 of the housing 1
The area around the side sentry station Oyohigya 3 is filled with engine mail. And “ζ, although not shown, housing 1
An ignition signal generator is built-in and generates an ignition signal as the shaft 2 rotates, and high voltage power is distributed by a high voltage power distribution section (not shown).

Next, the main structure of the present invention will be explained with reference to FIG.

The spring 6 is inserted between the shaft 2 and the housing 1 together with the spring holding parts 4 and 1B, and an annular press-fitting member 7 having an outer diameter smaller than the inner diameter of the housing 1 is press-fitted into the shaft 2 with a predetermined dimension. Furthermore, the bearing member 4C is press-fitted into the inner periphery of the housing 1 with a predetermined dimension. Incidentally, the axial protrusion 8a of the spring retaining member 8 is fitted into the cutout groove 1a on the inner periphery of the nose 1 housing l to prevent the spring 6 from rotating.

According to this structure, there are sliding parts at two places: (1) the spring holding member 8 and the press-fitting member 7, and (2) the J1-input member receiving member 4C. Both of these sliding parts have excellent durability because they receive sufficient lubrication from the engine mail. Therefore, there is no need to use particularly durable members, which is advantageous in terms of cost.

In addition, in the present invention, it is assumed that an engine oil is applied to the sliding part, and in FIG.
b, lc are provided, but shaft 2 and bearing part +44C
There is a gap between the holes 1a and lb, and the engine oil enters around the press-fit member 7 from this part, so the holes 1a and lb are not absolutely necessary.

[Brief explanation of the drawing]

Figure 1 does not show the configuration of the main parts of a conventional power distributor;
The figure is a vertical sectional view of the main components of the power distributor of the present invention, without showing the tJ can 11, and Figure 3 is an enlarged cross-sectional view of the main RB of the power distributor shown in Figure 2. 1... Housing, la...notch groove, ll), lc
... Hole forming an oil passage, 2... Shi4, Flul,
4a. 4C...Sliding bearing member, 6.../<ne, 7...Press-fitting part +4.8...Spring holding member, 8a...Protrusion, 9
...Mail 1ffl I? Gap forming R. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] In an ignition power distribution device for an internal combustion engine, which has an ignition signal generator built into the housing and a shaft supported by the housing by a sliding bearing member, the ignition power distribution device is press-fitted into the inner circumferential surface of the housing on the internal combustion engine driving part side and supports the shaft. a sliding bearing member press-fitted into the outer periphery of the shaft adjacent to the bearing member; a spring holding member disposed adjacent to the press-fitting member at a position opposite to the bearing member; A detent protrusion is formed on the holding member and is inserted between the spring holding member and the housing, and is inserted between the spring holding member and the housing, and the press-fitting member is connected to the bearing through the spring holding member. An ignition power distribution device for an internal combustion engine, comprising a spring that is brought into pressure contact with a member, and an oil passage that guides engine oil around the press-fitting member from the internal combustion engine driving section side.