JPH06100175B2 - Distributor with integrated ignition coil for internal combustion engine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ignition coil integrated power distributor for an internal combustion engine,
Particularly, the present invention relates to a distributor having a structure suitable for assembling, waterproofing, and vibration resistance.

[Conventional technology]

As described in Japanese Patent Publication No. 60-18834, the conventional ignition coil integrated type distributor has a structure in which the ignition coil is attached to the side of the housing and is fixed by screwing it in a direction perpendicular to the axial direction of the distributor. Was there.

Further, as described in JP-A-61-231708, a structure is provided in which a through hole is provided in the ignition coil iron core in the axial direction of the distributor, and a coil is wound around the through hole to be installed above the shaft bearing portion of the housing. Was there.

[Problems to be Solved by the Invention]

In the former case of the above-mentioned conventional technique, the side length of the power distribution unit on the side where the ignition coil is installed becomes long, and the power distributor becomes large.
In addition, the ignition coil must be screwed and fixed from the direction perpendicular to the distributor axial direction, and the various components of the distributor are screwed in multiple directions, resulting in poor assembly and axial dimensional deviation. It had an easy structure.

In the latter of the above-mentioned conventional techniques, the ignition coil is arranged above the shaft bearing of the housing, so that the axial length of the distributor must be increased by the thickness of the ignition coil. Also, in the case of a distributor that directly connects the shaft to the cam shaft of the engine, the span between the shaft bearings of the shaft becomes short,
Possible drawbacks include interference due to rotational shake of the shaft and unstable output signals. Also, if the distributor is placed horizontally on the engine,
The position of the center of gravity of the distributor in the axial direction is separated from the mounting portion on the engine, and the reliability of vibration resistance and strength is reduced. An object of the present invention is to obtain a power distribution device that is excellent in downsizing, assembly workability, vibration resistance, and reliability.

[Means for Solving the Problems]

The above-mentioned object is to provide a closed magnetic circuit type ignition coil in which a primary winding and a secondary winding are wound on one side of a V-shaped iron core, and an iron core portion of the other side facing the winding portion of the governor advance mechanism. It is achieved by arranging the iron core at the lower part of the weight stand and between the winding part and the bearing, clamping the iron core to the bottom part of the housing in the axial direction of the rotating body, and enclosing the outer periphery of the ignition coil with the side wall of the housing.

[Action]

In the power distributor of the present invention configured as described above, the iron core of the ignition coil can be arranged without changing the dimension between the governor advance engine and the bearing, and the winding portion is arranged close to the rotating body. Therefore, the size of the rotary body can be reduced, and the rotational runout of the rotary body can be prevented. Further, by mounting on the bottom of the housing, the position of the center of gravity can be brought closer to the mounting side of the engine, and vibration resistance can be improved.

By tightening and fixing the ignition coil in the axial direction of the rotating body, the accuracy of the axial dimension can be improved and the assembling workability can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In FIGS. 1 and 2, the shaft 1 is rotatably supported by a housing 4 having bearings 2 and 3. Shaft 1 has a weight stand 5, a weight 6, springs 7,
A governor advance mechanism 10 composed of a timing lever 8, a rotor shaft 9, etc. is assembled. To the rotor shaft 9, a reluctor 12 having a magnetic pole 11 and a power distribution rotor 14 having a power distribution electrode 13 and made of an insulating material are attached. At the end of the shaft 1 on the engine side, a coupling 15 is attached which is coupled to the shaft on the engine side and receives a rotational driving force.

The breaker base 16 is composed of a fixed base 17 fixed to the housing 4, a movable base 18 fitted to the fixed base 17 and rotatably held, and a stator 20 on the movable base 18 via a magnet 19. Is installed. A magnetic pole 21 facing the magnetic pole 11 of the reluctor 12 is integrally formed with the stator 20. The operating lever 23 of the vacuum advance mechanism 22 fixed to the housing 4 is connected to the movable base 18. An ignition unit 25 integrally having a pick-up coil 24 arranged so as to be engaged with the outer periphery of the rotor shaft 9 is fixed to the housing 4 via a mounting base 26.

An ignition coil 29 including an iron core 27 having a square V-shape in plan view and a winding portion 42 formed of a primary winding and a secondary winding wound on one side 28 of the iron core 27 has an iron core 27 with a screw 30. It is fixed to the bottom of the housing 4 by tightening the shaft 1 in the axial direction. The other piece 31 of the iron core facing the winding portion 42 is arranged under the weight table 5 and between the bearing 2 and the winding portion 42.

The outer periphery of the ignition coil 29 is surrounded by the side wall 43 of the housing 4.

A high voltage tower 33 in which a high voltage electrode 32 connected to the secondary winding is covered with an insulating resin is integrated with the ignition coil 29.

The power distribution cap 37 in which the center electrode 34, the connecting electrode 35, and the side electrode 36 are integrally molded with an insulating resin is provided at the end opening of the housing 4.
It is attached via a packing 44 so as to cover 38.
The center electrode 34 is connected to the power distribution electrode 13 via the spring 39 and the carbon point 40, and the connecting electrode 35 is connected to the high voltage electrode 32 via the spring 41.

The ignition unit 25 and the ignition coil 29 are electrically connected by lead wires 45 to 47.

Next, the operation will be described.

When the shaft 1 is rotationally driven by the engine, the magnet
A magnetic flux changes in a magnetic circuit composed of the stator 20, the reluctor 12, the rotor shaft 9, and the movable base 18. Electrodes are induced in the pick-up coil arranged in this magnetic path. The ignition unit uses this voltage as the ignition signal.
Incorporated in 25, the power transistor in the circuit is the ignition coil
29 Cuts off the primary current flowing through the primary winding. At this time, a high voltage is generated in the secondary winding of the ignition coil 29. This high voltage is taken out to the high voltage electrode 32, and the spring 41 and the connecting electrode 3
5, center electrode 34, spring 35, carbon point 40,
It is applied to a spark plug (not shown) via the power distribution electrode 13 and the side electrode 36.

The cabana advancing mechanism 10 rotates the reluctor 12 via the timing lever 8 and the rotor shaft 9 while balancing the centrifugal force generated in the weight 6 with the spring 7 to move the shaft 1
The ignition timing is controlled by changing the angular position of the reluctor 12 with respect to.

〔The invention's effect〕

According to the present invention, since the ignition coil can be arranged close to the center of the shaft and can be arranged at the bottom of the housing without changing the axial dimension of the rotating body, the size can be reduced and the vibration resistance can be improved. effective.

Since the iron core is tightened from the axial direction of the rotating body, there is an effect that dimensional accuracy and assembly workability can be improved.

Since the outer periphery of the ignition coil is surrounded by the side wall of the housing, the preventive property can be improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the present invention, and FIG. 2 is a plan view with the power distribution cap and the power distribution rotor of FIG. 1 removed. 1 ... Shaft, 2, 3 ... Bearing, 4 ... Housing, 5 ... Weight stand, 10 ... Governor advance mechanism, 25 ... Ignition unit, 27 ...
Iron core, 28 ... One side of iron core, 29 ... Ignition coil, 31 ... Other side of iron core, 42 ... Winding part, 43 ... Side wall.

Claims (1)

[Claims] 1. A housing, a shaft supported by the housing through a bearing and rotating in synchronization with the rotation of an engine, a governor advancing mechanism mounted on the shaft, and an iron core having a square V-shaped plan. In an internal combustion engine ignition coil integrated type distributor having an ignition coil having a primary winding and a secondary winding wound on one side, the other side of the iron core facing the winding section is connected to the governor advance mechanism. It is arranged so that it is located below the weight stand, which is a component, and between the winding part and the bearing, and the iron core is tightened with a screw from the axial direction of the shaft to the bottom of the housing, and the outer circumference of the ignition coil is fixed. An ignition coil integrated power distributor for an internal combustion engine, which is surrounded by a side wall of a housing.