JPH0133798Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a governor adjustment device for an internal combustion engine with a governor used as a prime mover of a portable generator, for example.

The governor is adjusted by changing the mounting angle of the governor arm relative to the governor shaft, but in the conventional system, the mounting angle is changed by loosening the tightening bolts and nuts at the mounting points of the governor shaft and governor arm. In other words, since the base of the long governor arm is turned, even if the angle is changed slightly, the tip of the arm swings considerably, and fine adjustment requires skill.

In addition, in the case of a vertical general-purpose internal combustion engine, the governor mechanism including the governor arm is exposed on the side of the engine body, so it is easy to tighten and loosen the bolts and nuts at the governor arm attachment point when adjusting the governor. In the case of horizontal or inclined internal combustion engines, the governor arm is installed on the top of the crankcase so that it can swing horizontally, and the fuel tank is placed above it, so the governor arm attachment point is located at the back. It is difficult to adjust as is. Therefore, when adjusting the governor, I had to remove the fuel tank.

The purpose of this invention is to solve the above-mentioned problems of conventional governor adjustment devices.The intermediate part of the governor arm can be bent and extended within the swinging plane of the governor arm, and a mechanism for fixing the bending and extension angle is provided. The gist is that.

To explain the embodiment shown in the drawings, 1 has a cylinder 2 inclined, a fuel tank 4 on top of a crankcase 3, a muffler 5 on top of the cylinder 2, and a carburetor 6 installed on the side of the cylinder 2. This is an internal combustion engine equipped with a governor, in which an air cleaner 7 is arranged in line with a muffler 5 on top of the engine.

Case 3 is located approximately in the center of the upper surface of crankcase 3.
A governor shaft 8 is rotatably supported through the ceiling of the vehicle. The lower end of the governor shaft 8 is in contact with a governor slider (not shown), and the base of the governor arm 9 is integrally fastened to the upper end. The free end of the governor arm 9 is connected to the free end of a throttle arm 10 provided on the upper surface of the carburetor 6 by a governor rod 11.

The governor arm 9 also includes a control lever 12 provided above the cylinder 2 and a governor spring 1.
Connected by 3.

As shown in FIG. 3, the governor arm 9 is divided into a shaft side 91 and a rod side 92 at approximately the center.
are connected by fixing the overlapping portions of the connecting portions 91A and 92A on the same side with a shaft pin 14 at their opposing ends.

A pair of screw receivers 15 and 16 are provided at opposing ends of the shaft side arm 91 and the rod side arm 92, one having an elongated hole extending in the axial direction of the governor arm 9, and the other having a female screw hole. Receiving part 16
An adjusting screw 17 is screwed into the other screw receiving portion 15 through the screw receiving portion 15 .

A compression coil spring 18 supported by a screw 17 is placed between the screw receivers 15 and 16. A torsion coil spring may be supported and attached to the shaft pin 14, and both ends of the spring may be hooked onto the screw receivers 15 and 16, respectively.

The base 91B of the shaft side arm 91 is bifurcated, and the upper end of the governor shaft 8 is held in its mouth by the forked base 91B, and by tightening the bolt 19 and nut 20 that pass through the bifurcated base 91B laterally, the governor arm 9 is attached to the governor shaft. 8 to prevent it from turning and coming off.

Governor adjustment is done by operating the screw 17 mentioned above.
When turned in the tightening direction, the rod side arm 92 swings in the direction of arrow a using the shaft pin 14 as a fulcrum. screw 1
When 7 is turned in the loosening direction, the tension of the spring 18 is applied and the rod side arm 92 swings in the direction of arrow b.
In other words, do not touch the attachment points of the governor arm 9 and governor shaft 8 at all, and remove the governor arm 9.
By turning the adjustment screw 17 located in the middle of
The governor arm 9 can bend and extend to change its angle with respect to the governor shaft 8.

As described above, the governor adjustment device of the present invention allows the intermediate part of the governor arm 9 to be bent and stretched within the swinging plane of the governor arm 9, and the bending and stretching angle fixing mechanisms 15, 16,
17 and 18, the bending/extending position for changing the angle of the governor arm relative to the governor shaft is far away from the governor shaft, and compared to the conventional system where the base of the governor arm is rotated relative to the governor shaft to change the installation angle of the governor arm, the tip of the governor arm is There is little vibration. Therefore, fine adjustment is easy.

In addition, when the governor adjustment device of the present invention is applied to an internal combustion engine with an inclined or horizontal cylinder as in the embodiment, the bending/extending adjustment part of the governor arm is located in front of the governor shaft, so it can be easily reached with a general tool. There is no need to remove and install the fuel tank each time the governor is adjusted, which has the effect of reducing the number of man-hours required for adjustment work.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an internal combustion engine equipped with the governor adjustment device of the present invention, FIG. 2 is a plan view of the internal combustion engine with a portion of the fuel tank cut away, and FIG. 3 is an enlarged plan view of the governor arm. 8 is the governor shaft, 9 is the governor arm, 10
is the throttle arm, 11 is the governor rod, 14
15, 16, 17, 18 are bending/extending angle fixing mechanisms, and 19, 20 are fixing bolts and nuts for the governor shaft and governor arm.

Claims (1)

[Scope of utility model registration request] Governor adjustment for an internal combustion engine in which one end is fixed to the governor shaft and the other end is connected to the throttle arm via a governor rod.The intermediate part of the governor arm can be bent and extended within the swinging plane of the governor arm, and a mechanism for fixing the bending and extension angle is provided. Device.