JPH04179829A - Rotary machine drive apparatus for oil pressure pump or the like - Google Patents

Abstract

PURPOSE:To enable a mounting with the mounting dimensions of an internal combustion engine remaining unchanged in comparison with conventional ones, by removably mounting a rotary machine such as an oil pressure pump on a power transmission case mounted on a cylinder body of the engine in such a manner as to permit this case to extend therefrom. CONSTITUTION:A power transmission case constituted of a rotating wheel 2, a bearing 3, a bearing base 5 and a mount base 1 is mounted extending from a cylinder body 9 of an internal combustion engine E. And a pump case 6 is removably mounted on the power transmission case. This enables a mounting of the oil pressure pump with the mounting dimensions of the engine E remaining unchanged in comparison with conventional or existing ones.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a mechanism attached to an internal combustion engine for mounting and driving rotating equipment such as a hydraulic pump.

(B) Prior Art Conventionally, in the internal combustion engine mounted on a tractor, a hydraulic pump consisting of a gear pump is attached integrally with the internal combustion engine, and pressure oil is discharged to a hydraulic case at the rear of the tractor, and the cylinder inside the hydraulic case is The technology for extending and retracting the lift arm and rotating it up and down is known.

(c) Problems to be Solved by the Invention The present invention provides a transmission case on the side wall of an internal combustion engine, and attaches a rotating device such as a variable axial plunger type hydraulic pump to the transmission case to rotate a hydraulically driven working machine. It is something to do.

In the above-described mechanism for attaching a hydraulic pump to an internal combustion engine, the hydraulic pump can be attached while keeping the mounting dimensions of the internal combustion engine as similar to existing ones as possible.

Further, in existing internal combustion engines, by effectively utilizing the space on the side of the cylinder body and using this space as a power transmission space, it is possible to attach rotating equipment such as a hydraulic pump.

Further, when the internal combustion engine is an air-cooled engine of the inclined cylinder type, there is an extra space below the inclined cylinder, so the hydraulic pump is arranged in the extra space,
It has a compact structure. .

Also, do not remove power transmission means such as belts (,
It is constructed so that rotating equipment such as ST type transmissions can be replaced or inspected.

In addition, the drive shaft of rotating equipment such as the H3T transmission receives only torque from the fitting hole of the rotating ring, but does not receive external forces in the radial direction such as bending moment, which leads to the increase in the size of the H5T transmission. Even a relatively small type can be installed on a high-output engine.

(d) Means for Solving the Problems The problems to be solved by the present invention and the means for solving them are as described above. Next, the means for solving the problems will be explained.

A transmission case is attached to extend from the cylinder body of an internal combustion engine, and rotating equipment such as a hydraulic pump is detachably attached to the transmission case.

Further, rotating equipment such as a hydraulic pump is arranged below the side wall of the internal combustion engine.

Further, the internal combustion engine is an inclined cylinder type air-cooled engine, and rotating equipment such as a hydraulic pump is arranged below the inclined cylinder.

In addition, a rotating wheel 2 is attached to the cylinder body of the internal combustion engine main body, and is driven from the engine output shaft via a power transmission means such as a belt.
A bearing 3 is provided in the center of the rotary ring 2, and a fitting hole 2a is provided in the center of the rotating ring 2, into which a drive shaft 4 of a rotating device such as a hydraulic pump is interlocked, and a rotating device such as a hydraulic pump is mounted on the cylinder body of an internal combustion engine. , which is detachably fixed in accordance with insertion and removal of the drive shaft 4 into the fitting hole 2a.

(E) Embodiment The problems to be solved by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is a partial cross-sectional plan view of a water-cooled one-cylinder diesel engine, which is an internal combustion engine, with rotating equipment such as a hydraulic pump attached. FIG. 3 is a rear view of the diesel engine equipped with rotating equipment such as the hydraulic pump of FIG. 1, and FIG. 4 is a front view of the axial plunger type hydraulic pump.

The internal combustion engine E, which is a water-cooled one-cylinder diesel engine, is constructed as follows.

It is constructed around a cylinder body 9, and a fuel tank 24 and a radiator 25 are arranged above the cylinder body 9. Further, an air cleaner 26 and a muffler 27 are arranged on the side of the radiator 25.

A cylinder is placed horizontally under a portion where the muffler 27 and air cleaner 26 are arranged side by side.

A transmission case protruding from the cylinder body 9 is disposed in a free space below the fuel tank 24 on the opposite side, and a rotating device such as a hydraulic pump is attached to the transmission case.

Further, a bracket 16 and an end nut 14 are fixed to a flywheel 15 that is rotated by the crankshaft of the internal combustion engine E.
Other work equipment such as a generator, vibrator, and lift pump can be driven separately.

A belt 10 is wound around a drive pulley 11 provided inside the flywheel 15, and the belt 10 is wound around the rotating ring 2 and driven.

In FIG. 1, a portion of a transmission case to which rotating equipment such as a hydraulic pump is attached will be explained.

The transmission case is composed of a rotating ring 2, a bearing 3, a bearing stand 5, and a mounting stand 1.

Although the embodiment in which the mounting base 1 is extended and protruded from the cylinder body 9 of the internal combustion engine E is shown in FIG. It is okay to do so.

In the embodiment shown in FIG. 1, the mounting base 1 is fixed to the cylinder body 9 by bolts 1a.

A bearing stand 5 is fixed to the mounting base l with bolts 5a. A bearing 3 is provided on the bearing stand 5, and the rotating ring 2 is supported by the bearing 3.

A fitting hole 2a is provided in the rotating ring 2, and a drive shaft 4 is inserted into and engaged with the fitting hole 2a.

A pump case 6 constituting a rotating device such as a hydraulic pump is fixed to the rear surface of the mounting base 1 by a pin 6a.

Further, an oil passage support plate 8 is fixed to the end of the pump case 6. As shown in FIG. 3, the core oil passage support plate 8 has
The discharge and return oil fields 12 and 13 are opened, and the discharge and return oil fields 12 and 13 are opened.
Pressure oil is sent from the return oil fields 12 and 13 to a fixed axial plunger type hydraulic motor via a hose.

By rotating the movable swash plate 28 by the swash plate rotation shaft 7, the discharge direction and discharge amount of the pressure oil in the discharge/return oil fields 12 and 3 are adjusted.

In FIG. 2, the configuration of rotating equipment such as a hydraulic pump will be explained.

A cylinder case 29 is connected to the drive shaft 4 inside the pump case 6.
The cylinder case 2 is arranged rotatably with the cylinder case 2.
A piston 30 is fitted into the cylinder hole 9. As the cylinder case 29 rotates, the plurality of pistons 30
moves in and out of the cylinder hole of the cylinder case 29, and discharges the pressure oil to the return oil fields 12 and 13.

The drive shaft 4 is supported by bearings 31 and 32. Pressure oil is then sent to discharge/return oil fields 12 and 13 opened in the oil passage support plate 8.

With this configuration, although the tension from the belt 10 is applied to the rotating wheel 2, bearing 3, and mounting base 1, it is not applied to the drive shaft 4 and pump case 6, and the variable axial plunger type hydraulic pump is a precision component. has a drive belt 10
Since no tensile force is applied, the durability of the hydraulic pump is improved, and a small variable axial plunger type hydraulic pump can be attached to the large internal combustion engine E.

Figure 5 shows an internal combustion engine K, which is an inclined cylinder type air-cooled engine.
FIG. 6 is a rear view of an embodiment in which rotating equipment such as a hydraulic pump is attached, and FIG. 6 is a front view.

The internal combustion engine has a fuel tank 19 and a muffler 20 arranged at the top, and an air cleaner 21 and a carburetor 23 arranged at the sides. Further, a rope starter mechanism 22 is arranged at the front part.

In the present invention, rotating equipment such as a hydraulic pump can be mounted in the space below the air cleaner 21 and the carburetor 23.

That is, a mounting base 1, a rotating wheel 2, a bearing 3, and a bearing stand 5 are attached to a cylinder body 9, and a V-belt is applied to the rotating wheel 2 to drive it from a drive pulley 17 provided on the camshaft of the internal combustion engine. ing.

In the inclined cylinder type air-cooled engine, the cylinder head 18 is inclined around f and protrudes immediately to the side of the air cleaner 21.
A transmission case is constructed by attaching a mounting base 1 to a cylinder body 9 at a position below 8.

The transmission case is composed of a rotating ring 2, a bearing 3, a bearing stand 5, and a mounting stand 1 in the same manner as in the embodiment of the first internal combustion engine E.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

Since it is configured as claimed in claim 11, it is possible to mount the hydraulic pump without changing the mounting dimensions of the internal combustion engine from the existing one.

With the configuration as set forth in claim (2), in an existing internal combustion engine, the space on the side of the cylinder body 9 is effectively utilized and the space is used as a power transmission space, thereby reducing the need for rotating equipment such as a hydraulic pump. Installation was now possible.

With the configuration as set forth in claim (3), when the internal combustion engine is an inclined cylinder type air-cooled engine, there is an extra space below the inclined cylinder, so the hydraulic pump is disposed in the extra space, This allowed for a compact configuration.

Since the present invention is constructed as in claim (4), rotating equipment such as the H3T type transmission can be replaced or inspected without removing the power transmission means such as the belt.

In addition, the drive shaft of rotating equipment such as the H5T transmission receives only torque from the fitting hole of the rotating shaft, but does not receive external forces in the radial direction such as bending moment, which leads to the increase in the size of the H3T transmission. This made it possible to install even a relatively small device on a high-output engine.

[Brief explanation of drawings]

Figure 1 is a partial cross-sectional plan view of a water-cooled one-cylinder diesel engine equipped with rotating equipment such as a hydraulic pump, which is an internal combustion engine, and Figure 2 is a partial cross-sectional view of a water-cooled one-cylinder diesel engine equipped with rotating equipment such as a hydraulic pump.
A side sectional view of a variable axial plunger type hydraulic pump, Figure 3 is a rear view of the diesel engine equipped with rotating equipment such as the hydraulic pump in Figure 1, Figure 4 is a front view of the same, and Figure 5 is a tilted cylinder. A rear view of an embodiment in which a rotary device such as a hydraulic pump is attached to an internal combustion engine K, which is a type air-cooled engine,
FIG. 6 is also a front view. 1...Mounting stand 2...Rotating shaft 3...Bearing 4...Drive shaft 5...Bearing stand 6...Pump case 8...Oil passage support plate Applicant Yanmar Diesel Co., Ltd. Agent People Patent Attorney Toshikazu Yano

Claims (4)

[Claims] (1) A driving device for rotating equipment such as a hydraulic pump, characterized in that a transmission case is attached to extend from a cylinder body of an internal combustion engine, and a rotating equipment such as a hydraulic pump is detachably attached to the transmission case. (2) A driving device for a rotating device such as a hydraulic pump, characterized in that the rotating device such as the hydraulic pump according to claim (1) is disposed below a side wall of an internal combustion engine. (3) A rotating equipment drive device such as a hydraulic pump, characterized in that the internal combustion engine according to claim (1) is an inclined cylinder type air-cooled engine, and a rotating equipment such as a hydraulic pump is disposed below the inclined cylinder. (4) The cylinder body of the internal combustion engine is provided with a bearing for a rotating wheel that is driven from the engine output shaft via a power transmission means such as a belt, and the drive shaft of a rotating device such as a hydraulic pump is located at the center of the rotating wheel. A hydraulic system characterized in that a rotating device such as a hydraulic pump is fixed to the cylinder body of an internal combustion engine so that it can be attached and removed in accordance with the insertion and removal of the drive shaft into the fitting hole. Drive equipment for rotating equipment such as pumps.