JPH0220467Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for an ignition distributor for an internal combustion engine.

Conventionally, in this type of device, due to the machining accuracy of the parts that connect the ignition power distributor side and the engine side, and the accuracy of installing these parts, the rotating shaft on the power distributor side and the drive shaft on the engine side were separated. Since the shaft center of the power distribution device is eccentric, in order to avoid problems such as uneven wear that affects the bearing that supports the rotating shaft of the power distribution device when the engine rotates due to this eccentricity, and when installing the power distribution device on the engine, it is necessary to To facilitate insertion,
A gap was provided in the fitting dimension between the protrusion on the power distribution device side, which serves as the connection part, and the groove on the engine side, to prevent problems caused by the eccentricity described above. However, on the other hand, the above-mentioned gap causes engine ignition fluctuations, over-advancement, etc., making it impossible to obtain proper ignition timing.
There were shortcomings that led to a decline in the efficiency of the engine.

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional technology.The rotation of the power distribution device, which is the driven shaft, is The present invention provides an ignition power distributor which is provided with a compression spring that operates to press an axially movable protrusion provided at the tip of a shaft, and which presses and connects the movable protrusion.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an ignition distributor equipped with a drive device according to the present invention. In the figure, 1 is the main body of the power distributor, FIG. 2 is a side view, 2 is a drive claw, 2a is a tapered part of the drive claw 2, 2b is an elongated hole drilled in the drive claw 2, 3 is a housing, and 4 is a A rotating shaft, 5 is a bearing that rotatably supports the rotating shaft 4 at two places, 6 is a roll pin that fits into a hole communicating the driving claw 2 and the rotating shaft and holds the driving claw 2, 7 is a spring, and 8 is a magnet. 9 is an ignition unit that uses the signal from the signal generator 8 as input to intermittent the primary current of an ignition coil (not shown) to generate a high voltage on the secondary side; 10 is mounted on the rotating shaft 4; 11 is a bowl-shaped power distribution rotor attached to the governor advance device 10, and 12 is a cap that closes the opening of the housing 3.

FIG. 2 is a front and side view of the drive claw 2, and 2b
is an elongated hole into which the roll pin 6 is inserted. FIG. 3 is a front view and a side view showing the end of the camshaft of the engine. In the figure, 13 is the camshaft, 1
3a is a drive groove that engages with the drive pawl 2 provided on the end face of the camshaft 13, and 13b is a tapered portion of the drive groove 13 having the same taper angle as the taper portion 2a of the drive pawl 2.

Next, the operation will be explained. In Figure 1,
When the engine side drive shaft (not shown) starts, the rotation shaft 4 is driven via the drive pawl 2 connected to the drive groove 13a shown in FIG. give an intermittent signal according to the
This intermittent signal causes a high voltage to be generated on the secondary side of the ignition unit 9. Since the high voltage current generated by the ignition unit 9 is connected to the power distribution terminal in the center of the cap 12, the power distribution rotor that is in contact with this power distribution terminal and rotates around the power distribution terminal has a fixed voltage. Ignition the engine at the correct ignition position. Further, this ignition position is controlled by a cabana advance device according to the rotational speed.

As mentioned above, the spring 7 is operated by the signal generator 8, the governor advance device 10, and the power distribution rotor 11 in order to obtain optimum engine efficiency with proper ignition timing through the delicate control functions according to the engine rotational speed. When attaching the power distributor body 1 to the engine, insert the tapered portion 2a of the drive pawl 2 into the drive groove 13a of the camshaft 13.
It is fixed with a bolt while pressing down.

As a result, the rotating shaft 4 of the power distributor, which is a driven shaft, is pressed into contact with and coupled to the engine-side camshaft 13, which is a driving shaft.

As described above, according to the present invention, a compression spring is provided at the end of the rotating shaft on the ignition power distributor side, and the camshaft on the engine side and the rotating shaft are connected by pressure contact by this compression spring. Therefore, there is no operational gap between the angular position of the rotary shaft 4 and the rotational angular position of the engine, so the ignition arrangement is such that efficient engine operation is possible without over-advancement of the ignition position while the engine is rotating. There is an effect that electric appliances can obtain.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figures are a front view and a side view showing the drive pawl in FIG. 1, and FIG. 3 is a front view and a side view showing the camshaft on the engine side. DESCRIPTION OF SYMBOLS 1... Distributor main body, 2... Drive claw, 2a... Taper part, 2b... Long hole, 3... Housing, 4...
...Rotating shaft, 5...Bearing, 6...Roll pin, 7...
... Spring, 8 ... Signal generator, 9 ... Ignition unit, 10 ... Cabana advance device, 11 ... Distribution rotor, 12 ... Cap, 13 ... Camshaft, 13a ... Drive groove, 13b ... Taper Department.

Claims (1)

[Scope of utility model registration request] In an ignition distributor that is driven by rotational force transmitted from an engine and operates an internal signal generator, power distribution rotor, etc., it is held by a pin fixed to the lower end of the rotating shaft of the ignition distributor, and the pin is inserted into the ignition distributor. A drive pawl having a long hole with a long diameter in the axial direction, and a spring on the outer periphery of the rotating shaft, one end of which is attached to the power distribution device body and the other end of which presses the drive pawl, are provided, and the power distribution device is connected to the engine. 1. An ignition power distribution device for an internal combustion engine, characterized in that when the drive pawl is attached to a camshaft end face of the engine, the drive pawl comes into pressure contact with a drive groove provided on an end face of a camshaft on the engine side.