JPS611831A - Governor apparatus of vertical type internal-combustion engine - Google Patents

Abstract

PURPOSE:To facilitate assembly by incorporating a governor apparatus and a regulator handle apparatus onto a cylinder block under the state preset onto the respective cover members. CONSTITUTION:The captioned apparatus consisting of a governor shaft 23 fixed onto a governor pulley 18 revolved through a timing belt 17, governor weight 44 installed under the governor shaft 23, a governor spring 41, etc. is preset onto a cover member 20, adjusting the gap H between the governor spring 41 and a spring press 21, and incorporated under this state onto a cylinder block 6. A regulator handle apparatus consisting of a regulator lever 31 installed onto a regulator shaft 30, the regulator handle, etc. is preset onto the cover member, and incorporated under this state onto the cylinder block 6. Thus, the assembly is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a governor device for a vertical axis internal combustion engine.

The application conditions for an internal combustion engine for an outboard motor are that it must be lightweight and compact, and the internal combustion engine for an outboard motor is built into the lower cowling and upper cowling. Maintenance and inspection can be easily performed by simply removing the scales, which is also a necessary condition.

On the other hand, due to the remarkable rise in the price of gasoline fuel in recent years, diesel engines are being adopted as internal combustion engines for outboard motors.

Therefore, when a diesel engine is used as an internal combustion engine for an outboard motor, the present invention provides a compact mechanical governor device (for example, a floating lever set governor device) that has a complicated mechanism that can reliably control fuel injection. It was designed to facilitate the assembly and maintenance of the diesel engine.

That is, the present invention provides a vertical shaft internal combustion engine having a governor device, in which a timing belt for driving the governor device is disposed at the top of a cylinder block of the internal combustion engine, and the governor device and regulator handle device are connected to each other. It is configured such that it can be attached to the cylinder block in a preset state on the lid member.

An embodiment of the present invention will be described below with reference to the drawings.
The schematic side view of FIG. 1 shows an outboard motor consisting of a diesel engine 2 and a drive unit 3 mounted on the stern 1 of a small boat in this embodiment. By rotating the propeller screw 4 provided at the bottom of the drive unit 3 to propel the small boat in the direction of arrow A, and by moving the steering handle 5 protruding forward of the outboard motor from side to side on the boat. I'm learning to control it.

Next, FIG. 2 shows an enlarged side sectional view of the inside of the diesel engine 2 shown in FIG. , the drive unit 3 is rotated by rotating the crankshaft 11 provided in the vertical direction.
In the above-described overhead cam type diesel engine 2, which rotates the propeller screw 4, the camshaft 12 can be positioned directly above the cylinder center, but in the present invention, the camshaft 12 can be positioned directly above the cylinder center. In order to shorten the overall length of the diesel engine 2 for aircraft, the camshaft 12
is positioned as low as possible in the nozzle 7 of the cylinder, and a unit injector 9 provided inclined toward the side where the camshaft 12 is provided is operated via a swing arm.

Further, each unit injector 9 of this diesel engine 2 is provided with a lever/X- for fuel injection amount control fixed to a plunger (not shown), and these levers are connected to each other by arrows parallel to the crankshaft 11. The control rod 16 is rotated by a fork 42 shown in FIG. It has become.

Next, on the upper part of this diesel engine 2, a governor boot is rotated by this crankshaft 11 via a timing belt 17 shown in FIG. '71B is rotatably supported by a bearing 19, a governor weight 44 and a governor spring 41 are attached to the lower part of a governor shaft 23 that rotates together with the governor pulley 18, and a governor spindle 45 that can slide up and down, etc. A type governor device (for example, a floating lever set governor device) is provided.

When the governor device operates and the governor weight 44 opens as the diesel engine rotates 20 times, the governor spindle 4
5 moves downward, and as a result, the floating lever 46, which rotates about the shaft 47, rotates, and further, via the link member 48 rotatably connected to one end of the floating lever 46, the floating lever 46 shown in FIG. To the left cylinder, the vertical movement of the governor spindle 45 can be changed in the direction of decreasing the fuel injection amount of the control rod 16 through a control lever 49 that is provided on the throat 7 and rotates around the shaft 40. It has become.

In FIG. 2, the diesel engine 2 is surrounded by a lower cowling 28 and an upper cowling 29. The lower cowling 28 is fixed to the outboard motor body, but the upper cowling 29 is attached to the handlebar. It can be easily removed by turning 27, and maintenance and inspection can be performed from above in the removed state.

In the floating lever set governor device having the above configuration, the spring force of the governor spring 41 supported by the spring retainer 21 integrated with the governor housing 22 and the centrifugal force of the governor weight 44 act as internal forces, so that the governor The amount of movement of the spindle 45 increases or decreases in proportion to the rotation speed of the diesel engine 2, and the third
The assembly of the governor device pre-assembled to the lid member 20 is completed by simply adjusting the gap H between the governor spring 41 and the spring retainer 21 in the figure. It becomes possible to easily incorporate it into the top surface of the cylinder block 6 of No. 2.

Next, the shaft 47 that supports the floating lever 46 is
is rotatably attached to a regulator lever 31, as shown in FIG. 4, which is a plan sectional view taken along the line t-L■ in FIG. , a regulator handle 26 is attached to the regulator lever shaft 30.

A pin 32 is attached to the regulator lever 31, and a pin 33 is attached to the regulator lever shaft 30, and a torsion spring 34 is provided between these. It acts as a return spring that returns it in the direction of.

Therefore, by the action of this torsion spring 34, the pins 32 and 33 are brought into close contact with each other at point P in FIG. 3 in the normal state. It is pre-tightly attached to the lid member of the regulator handle base 25 and assembled to the side surface of the upper part of the cylinder block 6 as an assembly.

Furthermore, the regulator handle 26 is connected to the steering handle 5 located on the stern 1 side shown in FIG. By rotating, the regulator handle 26 is operated, thereby increasing or decreasing the speed.

Therefore, if the governor device of the present invention is adopted, there is an advantage that the governor device and the regulator handle device, which have complicated structures, can be assembled on the upper part of the cylinder block as an assembly with the governor device and the regulator handle device preset in their respective lid members. This has the advantage that the number of man-hours can be reduced and the adjustment can be performed easily and accurately.

Furthermore, since the governor device of the present invention is located at the top of the engine, when used as an internal combustion engine for an outboard motor, simply removing the upper cowling of the outboard motor allows the floating lever to be moved as described above. Maintenance and inspection of the complete governor device can be easily performed, and operability is improved.

The governor device of the present invention is compactly formed when incorporated into a cylinder block, so it can be effectively applied particularly to internal combustion engines for outboard motors.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the main part of the stern of a small boat equipped with an outboard motor according to an embodiment of the present invention, and FIG. 2 is an enlarged side sectional view of the main part showing the inside of the diesel engine shown in FIG. 3 is an enlarged side sectional view of the essential parts of the floating lever complete governor device seen from the back door of FIG. 2, and FIG. 4 is a plan sectional view of the essential parts taken in the direction 1-1 of FIG. 3.

Claims (1)

[Claims] In a vertical shaft internal combustion engine having a governor device, a timing belt for driving the governor device is disposed at the top of a cylinder block of the internal combustion engine, and the governor device and regulator handle device are preset in respective lid members. 1. A governor device for a vertical shaft type internal combustion engine, characterized in that the governor device is configured to be able to be attached to the cylinder block in the state in which the governor device is mounted to the cylinder block.