JPS5936794Y2 - Engine chain cover device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a cheno cover device for engines such as gasoline engines and easel engines.

Figure 1 is a side view of a normal engine.
is the engine body, 2 is the flywheel, 3 is the manual starting drive shaft, 4 is the camshaft, and 5 is the camshaft 4 from the manual starting drive shaft 3.
6 is a cheno cover that covers the endless cheno 5, and 7 is the cheno cover 6 that connects the engine body 1 to the engine body 1.
Reference numeral 8 indicates a bolt for tightening or fixing the bracket 7 to the engine body 1.

(See Fig. 2) The chenok cover 6 of the conventional chenok cover device for this type of engine is fixed to the engine body 1, but the endless chenok 5 inside the chenokabi-6 is
It has the property of elongating after a long period of use, and in order to absorb this elongation, it is necessary to increase the distance between the axes of the chain wheel (not shown) on which the endless chino 5 is stretched.

Therefore, in the conventional device, the hand-start drive shaft 3 is connected to the endless chino 5.
The endless chino 5 is moved in the direction in which it extends, that is, in the direction in which the endless chino 5 approaches the upper end of the chino cover 6.

In this case, in order to avoid interference between the chino cover 6 and the endless chino 5 caused by the relative positions of the chino cover 6 and the endless chino 5 being shifted and the gap between the chino cover 6 and the endless chino 5 disappearing, in the conventional device, the chino cover 6 and the endless chino 5 are The gap between them had been set in advance to be very large.

Therefore, the size of the ceno cover 6 becomes very large, which leads to an increase in material costs and also has disadvantages in terms of the space it occupies.

The present invention was proposed with the aim of solving the above-mentioned drawbacks of the conventional device, and consists of an engine cover with an engine timing adjustment indicator attached to a predetermined position, and an endless chino that connects the engine's crankshaft or camshaft. a stay that supports a drive shaft driven through the engine body and is attached to the engine body so as to be finely adjustable in the direction of the cylinder axis of the engine, and the drive shaft side end of the chino cover is fixed to the stay. The present invention also relates to an engine cenocover device characterized in that the opposite end portion is attached to the engine body so as to be able to be finely adjusted in the direction of the cylinder axis of the engine.

Hereinafter, the structure and operation of the present invention will be specifically explained with reference to the embodiment shown in FIG.

In the figure, 1 is the engine body, 2 is the flywheel, and 3 is the engine camshaft or crankshaft (not shown).
The configuration, operation, and mutually related structure of these members are almost the same as those of the conventional device described above.

(Equivalent parts are given the same reference numerals.) 10 is a long groove provided in an appropriate position on the side wall of the engine body 1 in parallel to the cylinder axis XX direction; 11 is the drive shaft 3 The stay 11 has long grooves 12 (two in the illustrated example) for attaching the step 11 to the engine body 1, which are aligned with the cylinder axis X of the engine body 1.
- It is provided parallel to X.

13 is a bolt for fixing the cheno cover 9 to the step 11; 14 is a bolt for tightening the long groove 10 of the cheno cover 9; and 15 is a bolt for attaching the step 11 to the engine body 1 via the long groove 12 of the step 11. Tighten with bolts,
Reference numeral 16 indicates indicators for adjusting the timing of the engine, which are provided on the cheno cover 9 as shown in the figure.

When adjusting the tension of the endless chino 5 in the chino case 9, loosen the bolts 14 and 15 and step 11.
and the cheno cover 9 to the cylinder axis X of the engine body 1.
-Move as appropriate along the X direction.

This movement is due to the fact that the long grooves 10, 12 are both provided parallel to the cylinder axis XX direction of the engine body 1.

When the endless chino 5 reaches a predetermined regular tension, tighten the tightening bolts 14 and 15, and fix the chino cover 9 to the step 11 with the fixing bolts 13.

In this case, since the cheno cover 9 moves along the cylinder axis XX direction of the engine body 1 as described above,
Since the indicator 16 also moves in the same way, there is no risk of interfering with engine timing adjustment.

The long groove 12 and the drive shaft 3 are tightened by bolts 15.
A step 11 supporting the engine body 1 is provided with a means for fine adjustment in the direction of the cylinder axis X-X of the engine, and the opposite end of the cheno cover 9 is attached to the engine body 1 by means of the long groove 10 and the tightening bolt 14. The main body 1 is provided with means for fine adjustment in the direction of the cylinder axis XX of the engine.

Since the device of the present invention has the above-described configuration and operation, the relative positions of the cheno cover 9 and the endless chino 5 do not change, and the cheno cover 9 and the endless chino 5 are connected from the initial stage. Since the dimensions of the gap can be set within the minimum range, this has the practical effect of being significantly advantageous in terms of cost and occupied space compared to the conventional method. This has the advantage that the alignment index 16 can be easily attached.

In the illustrated example, the long grooves 14 are formed in the longitudinal direction, but even if a plurality of holes are provided in the vertical direction in the trial production, there is no difference in the operation and effect.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional general engine, FIG. 2 is an enlarged perspective view of section A in FIG. 1, and FIG. 3 is a implied side view of an embodiment of the present invention. In Fig. 3, 1: engine body, 2: flywheel, 3: drive shaft, 5: endless chino, 9: chino case,
10: Long groove, 11 Nistay, 12: Long groove, 13: Fixed pole l-114, 15: Tighten with bolt, X-X: Engine cylinder axis center line.

Claims (1)

[Scope of utility model registration request] The engine timing adjustment index is attached to a cheno cover mounted in a predetermined position, and supports the drive shaft that drives the engine crankshaft or camshaft via an endless chino, allowing the engine to move slightly in the direction of the engine's cylinder axis. and an adjustable stay, and the end of the drive shaft side of the cheno cover is fixed to the stay, and the opposite end can be finely adjusted to the engine body in the direction of the cylinder axis of the engine. An engine cover device characterized by being attached to.