JPS6024948Y2 - Installation structure of power distribution device for engine ignition - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a mounting structure for an engine ignition power distributor.

Generally, when installing a power distribution device for engine ignition in the engine case of an engine, as shown in Fig. 1, a cam 2 is fixedly installed in the engine case 1, and a locking groove 3 is formed at the tip. A rotating shaft (camshaft) 4 is built in, and a part of the side surface of this engine case 1 is extended to form a flange part 1'.
A fitting hole 5 concentric with the rotating shaft 4 is bored in ', and a part of the housing 7 of the power distributor 6 for engine ignition is separately extended to form an extension part 7'. Power distributor 6 inside
The drive shaft 8 of the drive shaft 8 is fitted loosely, and the extension part 7' is inserted into the insertion hole 5 of the flange part 1' to attach and support the power distributor 6 to the engine case 1. A locking pawl 9 formed at the tip is fitted into and locked into the engagement groove 2 of the rotating shaft 4 so as to rotate synchronously, and the extension portion 7'
A bearing metal 10 is provided near the tip of the drive shaft 8, and a ball bearing 11 is provided inside the housing 7 to support the drive shaft 8.

In the conventional power distribution device mounting structure configured in this way, the power distribution device 6 is supported at two points, and therefore, the mounting portion of the power distribution device 6 becomes loose due to vibrations of the engine while the power distribution device 6 is in operation, and the power distribution device There is a risk of interfering with the operation of 6.
In order to prevent this, the length l of the fitting part between the flange part 1' of the engine case 1 and the extension part 7' of the housing 7 of the power distributor 6 is increased to support the power distributor 6. Therefore, the protruding length of the power distributor 6 from the engine case 1 also becomes longer, and when the power distributor 6 is installed, the overall length of the engine becomes longer, the support structure for the power distributor 6 becomes larger, and the connection between the power distributor 6 and the engine case 1 becomes longer. The overall length of the electric appliance 6 with the housing 7 is long and large, making it difficult to assemble in a narrow engine room.Moreover, this length 1 increases material costs, and the bearing of the drive shaft 8 is also made of metal bearings. There were various problems such as the need for two locations, front and rear of the ball bearing 10 and the ball bearing 11.

In order to solve these problems, this invention miniaturizes the support structure of the power distribution device to facilitate assembly, save material costs, and shorten the overall length of the engine when the power distribution device is installed. The purpose of the present invention is to provide a mounting structure that prevents rattling and allows smooth operation.

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

Note that the reference numerals in the middle of each drawing indicate the same members.

In Figures 2 and 3, 1 is the engine case;
Inside, a cam 2 is fixedly installed, a locking groove (hereinafter referred to as a second retaining part) 3 is formed at the tip, and an axial insertion hole 12 is formed at the tip. A shaft (camshaft) 4 is provided, and a part of the engine case 1 is configured to support the tip of the rotary shaft 4, and the fitting hole 12 is formed so that the rotary shaft 4 is supported by the engine case 1. It has been formed to the position where it will be.

Furthermore, a fitting hole 5 concentric with the fitting hole 12 of the rotary shaft 4 is bored in the side surface of the engine case 1.

Reference numeral 6 denotes a power distributor for engine ignition, and a drive shaft 8 of the power distributor 6 is installed in an extension 7' that is a slightly extended part of the housing 7.
This extended portion 7' is fitted loosely into the insertion hole 5 of the engine case 1, and the housing 7 of the power distributor 6 is attached to the engine case 1. The protrusion 8' of the drive shaft 8 of the power distributor 6 disposed in the case 1 is fitted and supported into the insertion hole 12 at the tip of the rotary shaft 4 until the rotary shaft 4 is supported by the engine case 1, In addition, a pin 13 (hereinafter referred to as a first engaging part) protruding in the perpendicular direction on the protruding part 8' of the drive shaft 8 and a locking groove 3 (second engaging part) of the rotating shaft 4 are connected to each other.
The rotating shaft 4 and the driving shaft 8 are rotated synchronously by locking the engaging portion), and the driving shaft 8 is rotated by one ball bearing 11 disposed in the housing 7. supported.

Note that 14 is an oil seal, and 15 is a seal ring of the engine case 1.

The method of engaging the rotating shaft 4 and the driving shaft 8 in the present invention described above is as follows: The driving shaft 8 is inserted into the axial locking groove formed on the inner peripheral surface of the insertion hole 12 at the tip of the rotating shaft 4. Fit and lock the protrusion protruding from the rotating shaft 4, or
and the drive shaft 8 may be locked together with a key.

According to the present invention configured as described above, the first engaging portion 13 of the drive shaft 8 of the power distributor 6 is connected to the second retaining portion 3 of the rotating shaft 4.
The protrusion 8' of the drive shaft 8 is supported by the engine case 1 via the rotating shaft 4, and the intermediate portion of the drive shaft 8 is fitted with a ball bearing 11. In other words, the power distributor 6 is reliably supported by the housing 7 via the extension part 7' of the housing 7 fitted into the fitting hole 5 and the drive shaft 8 fitted and supported by the fitting hole 12. It is supported in two places by

Therefore, the power distributor 6 operates smoothly without rattling, and the supporting parts of the power distributor 6 in the conventional structure, namely the flange portion 1' of the engine case 1 and the power distributor housing 7,
Since the extension portions 7' of both are significantly shortened, the length 1' of these insertion portions is also shorter and more compact than the length 1 of the conventional structure, which saves material costs for these portions and reduces the drive shaft. The protrusion 8' of 8 is connected to the engine case 1 via the rotating shaft 4.
Since the bearing metal 10 in the conventional structure is not required, the overall length of the engine can be shortened when the power distributor 6 is attached to the engine case 1, and it can be easily assembled in a narrow engine room, among other advantages. have

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional mounting structure between an engine case and a power distributor, Figs. 2 and 3 show an embodiment of the present invention, and Fig. 2 is a sectional view showing a mounting structure between an engine case and a power distributor. FIG. 3 is a plan view of the same with a part of the engine case omitted. 1... Engine case, 1'... Flange section, 2... Cam, 3... Locking groove (
2nd engaging part) 4...Rotating shaft, 5...Fitting hole, 6...Distributor, 7...Housing, 7'... ...extension part, 8...drive shaft,
8'... Protrusion, 9... Locking claw, 10
...Bearing metal, 11 ...Ball bearing, 1
2... Fitting hole, 13... Zen (first engaging part), 14... Oil seal, 15...
・Seal ring, 1, 1'... Length of insertion part.

Claims (1)

[Scope of utility model registration request] A fitting hole is provided in the engine case, and a fitting hole is formed concentrically with this fitting hole at the end of the rotating shaft of the engine,
A drive shaft of the power distributor is pivotally supported at one location within the housing of the power distributor, and the drive shaft is loosely fitted into an extension of the housing and protrudes from the nozzing, and is disposed within the engine case; A first engaging part is provided on the protruding part of the drive shaft that protrudes into the engine case, and a second engaging part is provided at the end of the rotating shaft, and the protruding part of the driving shaft is inserted into the insertion hole of the rotating shaft. The protruding part of the drive shaft is fitted and supported so that the tip of the protruding part reaches the support part of the rotating shaft, and the first retaining part is engaged with the second engaging part, and the extension extends from the housing of the power distributor. A mounting structure for a power distributor for engine ignition, characterized in that the power distributor is attached to an engine case by fitting the part into the fitting hole, and the drive shaft is rotated in synchronization with the rotation of the rotating shaft.