JPH0452448Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a governor device for an engine in which a support shaft for a governor slider is provided on a shaft separate from the crankshaft, and particularly to improvements in the assembly of the governor arm shaft and the stopper structure.

In stationary engines in which the shaft of the governor slider is arranged on a shaft separate from the crankshaft, the shaft of the governor arm that contacts the governor slider is generally supported by a bearing on the upper wall of the cylinder barrel, and the shaft protrudes above the barrel. A lock pin is fitted to the upper end of the governor arm shaft to prevent the shaft from coming off, and at the same time a stopper is provided on the outside of the upper wall of the barrel to abut the lock pin and restrict the rotation limit of the governor arm shaft. This prevents the governor arm, which is placed inside the barrel and swings, from interfering with connecting rods, crank pins, etc.

However, since the shaft part, which is the center of rotation of the governor arm, is stopped from rotating on the outside of the cylinder barrel, variations in the governor arm shaft, lock pin, and stopper parts and assembly errors, especially play in the pins, may cause the governor arm to move to the stop position. In addition, since the fuel tank and the like are located directly above the cylinder barrel, there is a risk that the lock pin may come into contact with a member other than the stopper and be affected by external influences such as malfunction.

The present invention was developed to solve the above-mentioned problems, and its purpose is to eliminate the need for measures to prevent the governor arm from interfering with connecting rods, etc., and to prevent the governor arm shaft from slipping out and restrict rotation. To provide a governor device for an engine which is operated separately, reduces variations in rotation regulation, and can surely stop a governor arm shaft at its rotation limit without being affected by external influences.

In order to achieve the above object, the present invention provides an engine in which the support shaft 14 of the governor slider 18 is provided on a separate shaft from the crankshaft 4, in which the governor weight 17, which advances the governor slider 18 by rotational centrifugal force, is attached to the cup-shaped rotating case 15.
A support shaft 14 is supported on the inside of the cylinder barrel 2 by a pin, and extends through the case 15. A support shaft 14 is provided protruding from the inner wall of the cylinder barrel 2, and the governor slider 18 is slid in the axial direction from the opening side of the case 15 on the support shaft 14. Attach the governor arm shaft 11 so that it can move freely, and attach the governor arm shaft 11 to the cylinder barrel 2.
The governor arm 31 is fixed to the outer side of the cylinder barrel 2 of the governor arm shaft 11 while the inner side of the cylinder barrel 2 of the governor arm shaft 11 is fixed to the cylinder barrel 2 of the governor arm shaft 11. The governor arm shaft 11 is bent radially outward with respect to the rotation axis of the governor arm shaft 11 so that the governor slider 18 can rotate in a pressing direction in which the governor slider 18 comes into contact with the bent portion 11b. The governor slider 18 is prevented from coming off via the bending part 11b by coming into contact with the tip of the bending part 11b on the side opposite to the pressing side of the governor slider 18 and regulating the rotation range of the governor arm shaft 11. The cylinder barrel 2 is characterized in that a stopper 24 is formed integrally with the inner wall of the cylinder barrel 2.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a cutaway side view of the main parts of the engine, and FIG. 2 is a plan view of the main parts of the governor device.

A crankshaft 4 is horizontally supported within the cylinder barrel 2 of the engine 1 with the cylinder sleeve 3 inclined to one side, and its crank pin 4a,
The piston pin 5a of the piston 5 sliding inside the cylinder sleeve 3 is connected to the piston pin 5a by a connecting rod 6.
Also, above the cylinder barrel 2 is a bracket 8...
A fuel tank 9 is placed therebetween.

A cylindrical bearing part 22 is installed on the upper wall 21 of the cylinder barrel 2 of the engine 1 for stationary use, at a part opposite to the cylinder sleeve 3, and a cylindrical bearing part 22 is installed from inside the barrel 2. The governor arm shaft 11 is rotatably inserted vertically, and the lock pin 12 is inserted horizontally into the upper end of the shaft 11 that protrudes above the bearing 22. A flat washer 13 is interposed.

Then, the inner part of the cylinder barrel 2 of the governor arm shaft 11 is bent outward so as not to interfere with the swing locus of the connecting rod 6 to form a bent part 11b.

On the other hand, a support shaft 14 is provided on the inner surface of the crankcase cover 7 that covers one end surface in the axial direction of the crankshaft 4 of the cylinder barrel 2 in parallel with the crankshaft 4. is rotatably supported, and a governor slider 18 is mounted so as to be slidable in the axial direction, and at the base end of the governor slider 18 is a pusher for a governor weight 17 supported by pins 16 in the rotary case 15. The portions 17a... are engaged.

The rotating case 15 is driven by the crankshaft 4 through a gear mechanism as is known, and the rotation of the case 15 causes the weight portions 17b of the governor weights 17 to expand, and the push portions 17a to expand.
The governor slider 18 is moved forward by the pressure of...

The lower end of the bent portion 11b of the governor arm shaft 11 is made to face the tip of the governor slider 18.

Furthermore, the bent portion 11b of the governor arm shaft 11
As shown in the figure, a horizontal stopper 24 is integrally formed to protrude from the side wall 23 of the cylinder barrel 2 at a portion facing the tip of the governor slider 18 at an appropriate distance across the lower end thereof. This stopper 24 controls the throttle control limit of the carburetor and the crank pin 4 of the bent portion 11b.
It is formed taking into consideration prevention of interference with the connecting rod 6 and the like.

The governor arm 3 is attached to the upper end portion of the governor arm shaft 11 that protrudes upward from the bearing portion 22.
1 is fixed at its base with a bolt 32. A link mechanism 33 connected to the throttle of the carburetor is connected to the tip of the governor arm 31, as is known in the art.
A return spring 34 is stretched between the rear part and the fixed stay 35, and the governor arm 31 is disposed in a space below the fuel tank 9.

Next, the operation of the above governor device will be described.

First, when the engine 1 is operated, the rotating case 1
5 is driven by the crankshaft 4 to cause the governor weights 17 to expand, thereby causing the governor slider 18 to move forward, the bent portion 11b to swing, the governor arm shaft 11 to rotate, and the governor arm 31 and link Through the mechanism 33, throttle control of the carburetor is performed in accordance with the rotational speed of the crankshaft 4.

Governor arm shaft 11 of such a governor device
Since the inner part of the cylinder barrel 2 is formed into a bent part 11b and the bent part 11b is brought into contact with the governor slider 18, there is no need to arrange a governor arm inside the barrel 2, and therefore there is no interference between the governor arm and the connecting rod 6, etc. Prevention measures are no longer required, and barrel 2
Since the bent portion 11b can be directly stopped at the rotational limit by the inner stopper 24 provided integrally with the governor arm shaft, the governor arm shaft can be stopped directly on the outside in the radial direction compared to the conventional method in which the governor arm shaft is stopped directly on the outside of the barrel. This makes it possible to reduce variations in the stop position, and is not affected by external influences, so that malfunctions can be prevented. In addition, the bent part 11b of the governor arm shaft 11 is arranged inside the cylinder barrel 2, and the governor arm 31 is arranged above the barrel 2 in the space below the fuel tank 9, so that the space inside and outside the barrel 2 can be used rationally and effectively. You can also aim for Furthermore, as shown in FIG. 2, the governor slider 18, which moves forward from the bottom to the top, is prevented from moving forward when the bent portion 11b abuts the stopper 24. In other words, the stopper 24 not only restricts the rotation of the governor arm 31, but also prevents the governor slider 18 from coming off, and there is no need to separately provide a mechanism for preventing the governor slider 18 from coming off, which reduces the number of parts. can.

In the present invention, a governor weight 17 that advances the governor slider 18 by rotational centrifugal force is supported by a pin inside a cup-shaped rotating case 15, and a support shaft 14 passing through the case 15 is provided to protrude from the inner wall of the cylinder barrel 2. Moreover, since the governor slider 18 is attached to the support shaft 14 so as to be slidable in the axial direction from the opening side of the case 15, assembly of the governor device becomes extremely easy.

As described above, according to the present invention, the governor arm is disposed outside the cylinder barrel, and the stopper for regulating the rotation limit of the governor arm shaft is provided inside the cylinder barrel. There is no need to take measures to prevent interference with the
In addition to being able to reliably stop the governor arm shaft within a predetermined rotational limit without being affected by external influences, the following effects can be obtained.

(1) By simply inserting and fixing the governor arm shaft so that it protrudes from the inside of the cylinder barrel to the outside, the bent portion can prevent it from coming off and restrict its rotation.

(2) A stopper portion for regulating rotation can be easily formed on the inner wall of the cylinder barrel.

Further, since the stopper portion for regulating rotation is formed at a location radially outward and away from the rotation axis (with a distance secured), errors in the stopper position can be reduced.

(3) The governor slider contacts one side of the bent portion of the governor arm shaft to perform normal engine control operations using the governor arm, and prevents the governor arm shaft from rotating too much on the opposite side of the contact point. Since the stopper for this purpose is integrally formed on the inner wall of the cylinder barrel, and in other words, the stopper is formed by applying a force on the opposite side to substantially the same part of the governor arm shaft, the structure is simplified.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of the main parts of the engine, and FIG. 2 is a plan view of the main parts of the governor device. In the drawing, 1 is the engine, 2 is its cylinder barrel, 4 is the crankshaft, 11 is the governor arm shaft, 11b is the bent part, 12 is the lock pin, 13 is the flat washer, 14 is the support shaft, 18 is the governor slider, 24 is a stopper, and 31 is a governor arm.

Claims (1)

[Claim for Utility Model Registration] In an engine in which the support shaft 14 of the governor slider 18 is provided on a separate shaft from the crankshaft 4, the governor weight 17 that advances the governor slider 18 by rotational centrifugal force is attached to the cup-shaped rotating case 15.
A support shaft 14 is supported on the inside of the cylinder barrel 2 by a pin, and extends through the case 15. A support shaft 14 is provided protruding from the inner wall of the cylinder barrel 2, and the governor slider 18 is slid in the axial direction from the opening side of the case 15 on the support shaft 14. In addition to movably attaching the governor arm shaft 11 to the cylinder barrel 2.
The governor arm 31 is fixed to the outer side of the cylinder barrel 2 of the governor arm shaft 11 while the inner side of the cylinder barrel 2 of the governor arm shaft 11 is fixed to the cylinder barrel 2 of the governor arm shaft 11. The governor arm shaft 11 is bent radially outward with respect to the rotation axis of the governor arm shaft 11 so that the governor slider 18 can rotate in a pressing direction in which the governor slider 18 comes into contact with the bent portion 11b. The governor slider 18 is prevented from coming off via the bending part 11b by coming into contact with the tip of the bending part 11b on the side opposite to the pressing side and regulating the rotation range of the governor arm shaft 11. 1. A governor device for an engine, characterized in that a stopper 24, which serves as a stopper 24, is integrally formed on the inner wall of the cylinder barrel 2.