JPH08128330A - Speed reducing device of engine - Google Patents

Abstract

PURPOSE: To inexpensively manufacture a speed reducing device regardless of the existence of interposition of a speed reducer. CONSTITUTION: A flywheel 3 is arranged in the rear of an engine E, and a speed reducer 5 is arranged in the rear of the flywheel 3 in order in series to each other, and a speed reducer case 8 is fixed to a flywheel case 4 so as to be mountable and demountable. Since the speed reducer 5 is arranged in the rear of the engine E through the flywheel 3, when a work machine or the like is directly connected to the engine without interposing the speed reducer 5, it works well when the speed reducer 5 is separated from the flywheel case 4 together with the speed reducer case 8. Therefore, since common use of the flywheel case 4 can be made regardless of the existence of interposition of the speed reducer 5, production cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine speed reducer, which can share a flywheel case regardless of whether a speed reducer is mounted or not.

[0002]

BACKGROUND OF THE INVENTION The basic structure of an engine speed reducer to which the present invention is applied is, as shown in FIG. 1 or 3, an engine E.
, A flywheel 3 and a speed reducer 5 are disposed behind the flywheel 3, the flywheel 3 is covered with a flywheel case 4, the speed reducer 5 is covered with a speed reducer case 8, and the rotary shaft 1 of the engine E is passed through the speed reducer 5. It is of a type interlocking with the power take-off shaft 6.

[0003]

2. Description of the Related Art As a conventional technique of this type, as shown in FIG. 3, there is one in which a reduction gear 5 is arranged behind a crankcase 2 of a vertical engine E, and a flywheel 3 is arranged behind it. .

[0004]

In the above-mentioned prior art, since the flywheel 3 is fixed to the crankcase 2 of the engine E via the speed reducer 5, the flywheel case 4 of the flywheel 3 is located behind the speed reducer case 8. It is specially designed so that it can be directly connected to the side wall. Normally, the usage mode of the engine E
Depending on (for example, the type of work equipment to be mounted on the engine E), it is necessary to insert or remove the speed reducer 5, but if the speed reducer 5 is not used, the crankcase of the engine E It is necessary to separately prepare a flywheel case 4 that can be directly connected to.

That is, according to whether the reduction gear 5 is provided or not,
The flywheel case 4 must be divided into two types, a reduction gear release type and a direct connection type, which increases the production cost.
An object of the present invention is to manufacture a reduction gear at low cost regardless of whether or not the reduction gear is installed.

[0006]

Means for achieving the above object will be described below with reference to FIGS. 1 and 2 showing an embodiment. That is, the first aspect of the present invention is the engine speed reducer having the basic structure, in which the flywheel 3 is provided behind the engine E.
, The reduction gears 5 are sequentially arranged in series behind the flywheel 3, and the receiving wall 7 is attached to the flywheel case 4.
Each of the reduction gear cases 8 is provided with a mounting wall 10, and the mounting wall 10 is received and abutted against the receiving wall 7 to fix the reduction gear case 8 to the flywheel case 4 via fastening means 13 in a detachable manner. The output shaft 11 of No. 3 is interlocked with the input unit 12 of the speed reducer 5.

The present invention 2 is characterized in that, in the above-mentioned invention 1, the speed reducer case 8 is fixed to the flywheel case 4 so that the attitude can be switched in the rotational direction about the output shaft 11 of the flywheel 3. Is. Engine E above
The rotary shaft 1 of is a crank shaft or the like.

[0008]

[Action]

(1) In the present invention 1, the flywheel 3 is provided behind the engine E.
Since the speed reducer 5 is disposed via the speed reducer case 8 and the speed reducer case 8 is detachably fixed to the flywheel case 4 from the rear side, when the engine E is directly connected to the work machine without interposing the speed reducer 5, If the reducer 5 and the reducer case 8 are separated from the flywheel case 4, the output shaft 11 of the flywheel 3 can be used as it is as the power take-off shaft 6.

(2) In the present invention 2, since the speed reducer case 8 is fixed to the flywheel case 4 so that the posture can be switched in the rotational direction around the output shaft 11 of the flywheel 3, the engine E is mounted on the working machine. When doing so, it is possible to easily avoid interference with peripheral devices.

[0010]

【The invention's effect】

(1) In the present invention 1, since the speed reducer is arranged behind the engine via the flywheel and the speed reducer case is detachably fixed to the flywheel case, the flywheel case is used when the speed reducer is not used. It is sufficient to separate the reducer for each case from. Therefore, the flywheel case can be shared regardless of the presence or absence of the speed reducer, and the production cost can be reduced.

(2) According to the second aspect of the present invention, since the speed reducer case is fixed to the flywheel case so that the attitude can be switched, the engine can be easily mounted on the working machine while avoiding interference with peripheral equipment.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional side view of a main part of a speed reducer of a vertical water-cooled engine, and FIG. 2 is a rear view of the speed reducer as seen from the rear of the engine.

As shown in FIG. 1, a flywheel 3 is arranged behind the vertical water-cooled engine E, and a speed reducer 5 is arranged in series behind the flywheel 3. That is, the flywheel 3 is attached to the rear end portion 14 of the crankshaft 1 of the vertical water-cooled engine E.
Are fastened via fastening bolts 15, the flywheel 3 is covered with a substantially circular flywheel case 4, and the flywheel case 4 is fixed to the rear side wall 16 of the crankcase 2 of the engine E. The output shaft 11 is provided on the rear side portion 17 of the flywheel 3.
The transmission member 18 provided with is fastened with the fastening bolts 19, and the reduction gear 5 is exposed to the rear of the flywheel 3.
The output shaft 11 of 8 is interlockingly connected to the input portion 12 of the speed reducer 5,
The speed reducer 5 is covered with a speed reducer case 8.

As shown in FIGS. 1 and 2, a receiving wall 7 is provided on the rear side of the flywheel case 4, and a reduction gear case 8 is provided.
The mounting walls 10 are respectively provided on the front side of the
Six support seats 20 are equally projected on the mounting wall 10 in the outer diameter direction at equal intervals, and fastening bolts 13 are screw-fitted to each support seat 20 in the front-rear direction to receive the mounting wall 10 on the receiving wall 7. The reduction gear case 8 is removably fixed to the flywheel case 4 from the rear.

As shown in FIG. 1, the speed reducer case 8 is provided.
Is a body case 21 having a dharma shape that accommodates the gear 25 and is formed by combining large and small circles, a circular connecting case 22 extending to the front side of the body case 21 along the flywheel case 4, and a body. The rear cover 23 covers the rear of the case 21. An oil chamber 24 is formed below the main body case 21, and the power take-off shaft 6 of the speed reducer 5 is projected rearward from the rear cover 23. Reference numeral 26 is a drain plug of the oil chamber 24.

As shown in the rear view of FIG. 2, the reducer case 8 includes a flywheel case 4 and an output shaft 1 of the flywheel 3.
1 is fixed so that the posture can be switched in the rotational direction, the fastening bolt 13 is loosened, the reducer case 8 is removed from the flywheel case 4, and the entire reducer case 8 is rotated to a position where another support seat 20 fits. Moving and tightening bolt 1 again
When the main body case 21 is fixed to the flywheel case 4 at 3, the posture can be switched from the downward posture P in which the main body case 21 is located below to the horizontal posture Q in which the main body case 21 is displaced 90 degrees to the right side (see FIG. 2).

Therefore, the function of the speed reducer for the vertical engine of the present embodiment will be described. The speed reducer 5 is arranged behind the vertical engine E via the flywheel 3, and the speed reducer case 8 and the flywheel case 4 are arranged. When the engine E is directly connected to the working machine without interposing the reduction gear 5, if the reduction gear 5 is separated from the flywheel case 4 together with the reduction gear case 8, it is as it is. The output shaft 11 of the flywheel 3 can be used as the power take-off shaft 6. For this reason, the flywheel case 4 can be shared regardless of the presence or absence of the reduction gear 5, and the production cost can be reduced.

Further, the speed reducer case 8 is fixed to the flywheel case 4 so that the posture can be switched in the rotational direction about the output shaft 11 of the flywheel 3, so that the engine E can be operated while avoiding interference with peripheral equipment. It can be easily installed on the machine. An oil chamber 24 is provided in the main body case 21 of the speed reducer case 8 so that the gear 25 can be lubricated.
Lubricating oil of the engine body can be used as this oil.

[Brief description of drawings]

FIG. 1 is a left side view of a longitudinal section of a reduction gear for a vertical engine showing an embodiment of the present invention.

FIG. 2 is a rear view of the speed reducer.

FIG. 3 is a schematic plan view of a speed reducer for a vertical engine showing a conventional technique.

[Explanation of symbols]

1 ... rotary shaft, 2 ... crankcase, 3 ... flywheel,
4 ... Flywheel case, 5 ... Reduction gear, 6 ... Power take-off shaft, 7 ... Flywheel case receiving wall, 8 ... Reduction gear case, 10 ... Reduction gear case mounting wall, 11 ... Flywheel output shaft, 12 ... input part of reduction gear, 13 ... fastening means, E ... engine.

Claims (2)

[Claims] 1. A flywheel (3) behind the engine (E).
And a reduction gear (5) are arranged, the flywheel (3) is a flywheel case (4), and the reduction gear (5) is a reduction gear case (8).
And cover the rotating shaft (1) of the engine (E) with the speed reducer.
In the reduction gear of the engine interlocking with the power take-off shaft (6) via (5), the flywheel (3) is provided behind the engine (E) and the reduction gear (5) is provided behind the flywheel (3). The flywheel case (4) is provided with a receiving wall (7), and the reducer case (8) is provided with a mounting wall (10). ) Contact the reducer case
The output shaft (11) of the flywheel (3) is detachably fixed to the flywheel case (4) via fastening means (13).
An engine speed reducer characterized in that the engine is interlocked with the input section (12) of the speed reducer (5). 2. The reducer case (8) is a flywheel case.
The engine speed reducer according to claim 1, wherein the flywheel (3) is fixed to the (4) so as to be switchable in posture in a rotational direction about the output shaft (11).