JPS643782Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating machine such as a generator and an internal combustion engine that drives the rotating machine.

FIG. 1 shows a conventional example of a generator (motor generator) driven by an internal combustion engine.

In the figure, 1 is a shaft that integrates the crankshaft of an internal combustion engine and the rotating shaft of a rotating machine, and bearings 2,
3 and 4, the coaxial shaft 1 does not have to be integral, but may be divided and combined as appropriate, and the bearing 2 can also be omitted. The flywheel 5 is fastened to the shaft 1 together with the rotor 6 with a nut 7. Reference numeral 8 denotes cooling air intake ports provided at a plurality of locations in the rotating body case 9. In addition, the rotating body case 9 and the stator 16
Case 1 is fixed with bolts (not shown) through
Cooling air intake ports 10 are provided at several locations on the end face of the housing 7 . Blades 11 are provided on both sides of the flywheel 5.
and 12. Reference numeral 13 denotes a partition plate which is fixed to the rotating body case 9 by an appropriate method. 1
4 is an air exhaust port provided on the outer periphery of the rotating body case 9 at a position facing the blades 11 and 12, and 15 is an air guide plate.

The air entering from the cooling air intake port 8 is a, b, and c.
The cylinder 51 is cooled by flowing in the order indicated by the arrows. In addition, in the rotating machine, the blades 12 act as centrifugal fans, so air is sucked through the inlet 10, a',
It is cooled by flowing like b' and c'.

Such conventional motor generators have the following problems.

The rotating body case 9 is fixed to the crankcase 18 with bolts (not shown) or the like, and the lower end of the baffle plate 15 is fixed thereto.

That is, the baffle plate 15 is separate from the rotating body case 9, and its upper end is connected to the cylinder head 1.
9, the lower end is fixed to the rotating body case 9 with bolts or the like, which requires a large number of parts and therefore a large number of assembly steps.

Also, fins 20 that guide cooling air to the inner surface of the baffle plate 15
(Indicated by a two-dot chain line) is added, the above problem becomes even more serious.

The present invention was developed in view of the above, and its purpose is to provide a rotating machine driven by an internal combustion engine that has a small number of parts, reduces assembly man-hours, and allows a large amount of output to be extracted from the output shaft of the rotating machine. shall be.

1 of the present invention with reference to FIGS. 2 to 5 below.
To explain the embodiment, FIG. 2 is a sectional view of the main part,
Figure 3 is a view from the arrow in Figure 2, and Figure 4 is a view from the direction of the arrow in Figure 2.
FIG. 5 is a cross-sectional view of FIG. 3.

In the figure, 100 is an internal combustion engine, and 200 is a generator.

21 is a crankshaft rotatably supported by the crankcase 22 via a bearing 23, and 24 is a fan fixed to the crankshaft 21 with a nut 25 or the like.

26 is a connecting member whose flange portion 26a is fixed to the outer surface of the fan 24 with bolts 27 or the like;
A conical portion 26b and a tapered shaft portion 26c having a tapered outer periphery are formed on the opposite side of the flange portion 26a. 28 is an output shaft, which is integrated with the rotor 29, and a tapered inner circumference 28a at one end is connected to the connecting member 2.
The stud bolt 30 is fitted into the taper shaft portion 26c of No. 6 and is implanted in the taper shaft portion 26c.
It consists of a hole 28b into which the bearing 31 is loosely fitted, and a narrow diameter portion 28c that supports the bearing 31. Above output shaft 2
8 and the rotor 29, the washer 3 is attached to the stud bolt 30.
By screwing a nut 33 through 2, it is rotatably supported by a case 34, which will be described later, through a bearing 31.

Reference numeral 34 denotes a case, and a cover 35 having an air intake port (not shown) on the outer circumferential surface is removably attached to a boss 34a formed at the end of the case with bolts 36, and is attached with stud bolts 38, nuts 39, etc. It is fixed via a stator 37 to a rotating body case 40, which will be described later. 41 is a bolt (not shown) between the rotating body case 40 and the case 34.
This is a cover constructed by

Reference numeral 40 denotes a rotor case whose upper portion 40a extends to surround the cylinder 42, and has fins 40.
b, 40c, and a boss 40d are formed on the inner surface. The fins 40b and 40c are for efficiently guiding the cooling air sent from the flywheel 24 side to the cylinder 42 side.

A bolt 43 is loosely fitted into the boss 40d, and the bolt 43 is fitted into the boss 42a on the cylinder 42 side.
Screwed together.

The rotating body case 40, cylinder 42, and crankcase 22 are fixed with bolts 43 and 44.

During operation of the above device, the cooling air introduced from the air intake port (not shown) of the cover 35 by the rotation of the fan 24 is transferred to the stator 37 of the generator 200.
After cooling the rotor 29, the fins 40b, 40
c and reaches the cylinder 42, where it cools the cylinder 42 and the cylinder head 19 (see FIG. 1).

In the above device, the upper part 4 which is the wind guiding part
0a and fins 40b, 40c to the rotating body case 40
Since it is formed integrally with the main body, the number of parts and the number of assembly steps are reduced, and the entire device becomes compact.

In the above embodiments, a generator is shown as the rotating machine, but the present invention is not limited to this and can be applied to all rotating machines such as blowers and pumps.

The present invention is constructed as described above.According to the present invention, the air guide part is integrally formed in the upper part of the rotating body case on the engine side of the rotating body case in which the rotating machine is mounted, surrounding the cylinder of the engine. There is no need to provide a separate baffle plate as in the case of conventional models, which reduces the number of parts and the number of assembly steps. Moreover, the entire device becomes compact.

In addition, since the output shaft, which is separate from the crankshaft, is connected to the flywheel via a connecting member,
By increasing the outer diameter of the tapered portion of the connecting member, the inner diameter of the tapered inner periphery of the output shaft can be increased, so a large output can be extracted from the output shaft.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a conventional motor generator. 2 to 5 show one embodiment of the present invention, FIG. 2 is a view corresponding to FIG. 1, FIG. 3 is a view in the direction of the arrow in FIG. 2, and FIGS. FIG. 3 is a cross-sectional view and a cross-sectional view of FIG. 3; 100... Internal combustion engine, 200... Generator, 21
...Crankshaft, 22 ...Crankcase, 24
...fan, 29 ... rotor, 37 ... stator,
40...Rotating body case, 40b, 40c...Fin.

Claims (1)

[Scope of utility model registration request] In an air-cooled internal combustion engine that directly connects and drives a rotating machine such as a generator to the crankshaft, a flywheel is fixed to the end of the crankshaft, a connecting member is attached to the outer surface of the flywheel, and the outer periphery of the connecting member is fixed to the end of the crankshaft. A tapered part is formed on the rotary machine, and the tapered part is fitted to the tapered inner periphery of the output shaft of the rotating machine, and the cooling air from the flywheel is formed in the upper part on the engine side of the rotating body case in which the rotating machine is mounted. Driven by an internal combustion engine, the air guide section is integrally formed and surrounds the cylinder of the engine, and fins for guiding cooling air are integrally protruded from the inner surface of the air guide section. rotating machine.