JPH09170461A - Governor device for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the operational failure of a throttle valve. SOLUTION: A governor device 26 for an engine is formed in such a way that a governor lever 28 attached on a governor shaft 27 and a throttle lever 25 attached at the end of the throttle shaft 24 of a carburetor 21 are connected to each other through a carburetor rod 29, and this carburetor rod 29 is arranged slantly against the rotational direction of the throttle lever 25. In this case, a rod spring 32 is stretched between the governor lever 28 and the throttle lever 25. While one end of this rod spring 32 is locked in the engaging hole 31 of the carburetor rod 29 formed to the throttle lever 25, and also the other end thereof 18 locked in an locking hole 33 formed to the governor lever 28, the position of the locking hole 33 is so set that the rod spring 32 can be arranged approximately transverse to the throttle shaft 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine governor device.

[0002]

2. Description of the Related Art A general-purpose engine used in a portable generator or the like is equipped with a governor device for speed control which maintains a constant engine rotation speed regardless of load. Further, as a governor device, it is general that a mechanism for detecting a variation in the engine speed and a carburetor are connected by a link mechanism.

FIG. 3 and FIG. 4 are views showing a governor device 1 provided with a general link mechanism, and a governor lever 3 attached to a governor shaft 2 interlocking with an engine speed variation detecting mechanism (not shown), A carburetor rod 7 connects a throttle lever 6 attached to an upper end of a throttle shaft 5 of the carburetor 4, and the governor shaft 2 rotates to open and close a throttle valve 8 of the carburetor 4.

Both ends of the carburetor rod 7 are engaged with an engagement hole 9 of the governor lever 3 and an engagement hole 10 of the throttle lever 6. These engaging holes 9 and 10 are set to be larger than the diameter (thickness) of the carburetor rod 7 in terms of the assembling, so that the end portions of the carburetor rod 7 will remain inside the engaging holes 9 and 10 as they are. It moves freely, and the operation amount of the governor lever 3 cannot be accurately transmitted to the throttle lever 6.

Therefore, in general, a rod spring 11 is stretched between the levers 3 and 6 to keep the distance between the engagement holes 9 and 10 constant. Also, rod spring 1
Reference numeral 1 locks the engaging holes 9 and 10 of the carburetor rod 7, and locks a spring (not shown) near the engaging holes 9 and 10 to lock the rod spring 11 (actually). KAISHO 63-121741, Japanese Utility Model Publication 6-2
See Japanese Patent No. 3725).

[0006]

However, as shown in FIG. 4, when the carburetor rod and the rod spring are arranged obliquely with respect to the turning direction of the throttle lever, an axial force f acts on the throttle shaft. .
Since the throttle shaft and its bearing (not shown) receive a radial moment F of a distance SL × f from the center of the throttle shaft to the engagement hole of the carburetor rod, the throttle shaft is always twisted. The throttle valve may not operate normally.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an governor device for an engine which prevents malfunction of the throttle valve.

[0008]

In order to solve the above-mentioned problems, an engine governor device according to the present invention has a governor lever attached to a governor shaft and a carburetor throttle shaft. In a governor device for an engine in which a throttle lever attached to an end is connected by a carburetor rod, and the carburetor rod is arranged obliquely with respect to the rotation direction of the throttle lever, a gap between the governor lever and the throttle lever is A rod spring is stretched over
One end of this rod spring is locked in the engaging hole of the carburetor rod formed in the throttle lever, and the other end of the rod spring is locked in the locking hole formed in the governor lever, while the rod spring is The position of the locking hole is set so as to be arranged substantially at right angles to the throttle shaft.

Further, in order to solve the above-mentioned problems, as described in claim 2, an engaging hole of a carburetor rod is formed in the governor lever, and the rod spring is locked below the engaging hole. It has holes.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of the vicinity of a carburetor attached to an engine, and FIG. 2 is a sectional view taken along line II-II of FIG. As shown in FIGS. 1 and 2, a mixture passage 22 is formed in the carburetor 21, and a throttle valve 23 is arranged in the passage 22. The throttle valve 23 is fixed to the throttle shaft 24,
The rotation of the throttle shaft 24 adjusts the intake air amount, that is, the rotation speed of an engine (not shown). The throttle shaft 24 projects outside the carburetor 21 and has a throttle lever 25 at its end.

By the way, the engine is provided with a governor device 26 for speed control which keeps its rotation speed constant regardless of the load. The governor device 26 is mainly provided with a governor shaft 2 that is interlocked with an engine speed fluctuation amount detection mechanism (not shown).
7, a governor lever 28 attached to the governor shaft 27, and a carburetor rod 29 connecting the governor lever 28 and the throttle lever 25. The governor shaft 27 is rotated to rotate the throttle valve 23 of the carburetor 21. Is configured to be opened and closed. The carburetor rod 29 is arranged obliquely with respect to the rotating direction of the throttle lever 25.

Both ends of the carburetor rod 29 are engaged with an engagement hole 30 formed in the upper end of the governor lever 28 and an engagement hole 31 formed in the throttle lever 25. Further, a rod spring 32 is stretched between the governor lever 28 and the throttle lever 25, and both engagement holes 30, 3
It is configured to keep the distance between 1 constant.

One end of the rod spring 32 is engaged with an engaging hole 31 of a carburetor rod 29 formed in the throttle lever 25, and the other end of the rod spring 32 is engaged with an engaging hole 33 formed in the governor lever 28. Be stopped. The locking hole 33 is arranged below the engaging hole 30 formed at the upper end of the governor lever 28, and its position is set so that the rod spring 32 is substantially perpendicular to the throttle shaft 24.

Next, the operation of the present embodiment will be described.

By providing the governor lever 28 with the locking hole 33 for locking the rod spring 32 so that the rod spring 32 is substantially perpendicular to the throttle shaft 24, no force acts on the throttle shaft 24 in the axial direction. . As a result, the throttle shaft 24 does not get twisted, and the throttle valve 2 that has been conventionally generated is
The possibility that malfunction of item 3 will occur is reduced.

Further, since the carburetor rod 29 and the rod spring 32 are arranged apart from each other, the assembling property is improved.

Further, as the engine speed increases, the engine vibration also increases, and this vibration causes the carburetor rod 29 to vibrate, causing both ends of the carburetor rod 29 to jump within the engagement holes 30 and 31. The locking hole 33 of the rod spring 32 on the 28 side is fitted with the governor lever 2
8 is arranged below the engagement hole 30 at the upper end, the tension of the rod spring 32 increases with the throttle valve 23 in the open state, and jumping is prevented.

[0019]

As described above, according to the engine governor device of the present invention, the governor lever attached to the governor shaft and the throttle lever attached to the end of the carburetor throttle shaft are connected by the carburetor rod. In the governor device of the engine in which the carburetor rod is obliquely arranged with respect to the rotation direction of the throttle lever, a rod spring is stretched between the governor lever and the throttle lever, and one end of the rod spring is extended. Is locked in the engagement hole of the carburetor rod formed in the throttle lever, and the other end of the rod spring is locked in the locking hole formed in the governor lever, while the rod spring is substantially aligned with the throttle shaft. The locking holes so that they are arranged at right angles Since setting the location, in the throttle shaft does not act the force to its axial direction, it does not become pried state of the throttle valve malfunction does not occur.

Further, since the governor lever is formed with an engaging hole for the carburetor rod and the engaging hole for the rod spring is arranged below the engaging hole, the tension of the rod spring increases with the throttle valve open. The jump of the carburetor rod in the high engine speed region is prevented.

[Brief description of the drawings]

FIG. 1 is a plan view near a carburetor showing an embodiment of an engine governor device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view of the vicinity of a carburetor attached to a conventional engine.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

[Explanation of symbols]

21 carburetor 23 throttle valve 24 throttle shaft 25 throttle lever 26 governor device 27 governor shaft 28 governor lever 29 carburetor rod 30 carburetor rod engaging hole formed on the governor lever 31 rod carburetor rod engaging hole 32 rod spring 33 rod Spring locking hole

Claims (2)

[Claims] 1. A governor lever attached to a governor shaft and a throttle lever attached to a throttle shaft end portion of a carburetor are connected by a carburetor rod, and the carburetor rod is oblique to the rotation direction of the throttle lever. In the disposed engine governor device, a rod spring 32 is stretched between the governor lever 28 and the throttle lever 25, and one end of the rod spring 32 is engaged with the carburetor rod 29 formed on the throttle lever 25. The rod spring 32 is locked in the dowel 31 and
The other end of the locking hole 33 is locked in a locking hole 33 formed in the governor lever 28, while the position of the locking hole 33 is set so that the rod spring 32 is arranged substantially at right angles to the throttle shaft 24. And the governor device for the engine. 2. The engine governor according to claim 1, wherein an engaging hole 30 for the carburetor rod 29 is formed in the governor lever 28, and an engaging hole 33 for the rod spring 32 is arranged below the engaging hole 30. apparatus.