JPS6026204Y2 - Engine rotation adjustment device - Google Patents

Description

[Detailed description of the invention] The present invention is an engine rotation adjustment device that adjusts the engine rotation to low, medium, and high speed positions where the rotation speed is controlled at a constant speed by a governor device in general-purpose engines used for various operations. Regarding this, the operability has been improved, especially when setting in each position.

Conventionally, this type of device has a rotation adjustment lever located almost directly below the carburetor and air cleaner that protrude horizontally from the bottom of the engine body, and a wing nut that sets the lever to rotational positions corresponding to low, medium, and high speed positions. etc. are provided,
In addition to being difficult to operate due to the location, the complicated work of loosening and tightening the wing nut each time was postponed, and depending on how the engine was installed, it could not be operated because it was in the shadow of other parts. .

Such conventional examples include those described in Japanese Utility Model Application Publication No. 51-112121 and Japanese Utility Model Publication No. 47-2058.

The present invention was developed in order to solve this problem. A speed regulating rod is installed diagonally upward from the lower end of the governor lever at the bottom of the engine body, and three speed regulating rods corresponding to each rotational position are installed at the upper end of this speed regulating rod. A rotation adjustment knob having stepped portions is installed, and each stepped portion of the rotation adjustment knob is selectively engaged with a locking hole for positioning, so that it can be easily operated with one touch on the upper part of the engine body. The present invention also provides an engine rotation adjustment device that is designed to improve operability and increase the degree of freedom in engine installation.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, reference numeral 1 denotes the engine body of a general-purpose engine, and the upper cylinder side and the top thereof are covered with a cylinder baffle 2. , a cooling fan that is driven by the rotation of the crankshaft 3 and is connected to a blower housing 4 that covers a flywheel mounted on the opposite side of the protruding side of the crankshaft 3 and a duct 5 that covers a cooling fan, and is connected to the side of the cylinder baffle 2. Cooling air is sucked in from the blower housing 4, passed through the blower housing 4, and discharged from the duct 5, thereby forcibly cooling the air.

In addition, an air cleaner 7 is connected to the cylinder section via a carburetor 6.
is horizontally protruding, and a scale-type governor lever 8 with a gentle arc is mounted approximately vertically on the side of the carburetor 6. The carburetor 6 is connected to the upper end of the governor lever 8 via a connecting culm 9.
In FIG. 1, the throttle lever 10 swings the upper part of the governor lever 8 to the right and pushes the connecting frame 9 to close the throttle valve, and conversely swings the upper part of the governor lever 8 to the left to push the connecting frame 9. It is connected so that pulling it opens the throttle valve.

As shown in FIG. 3, a shaft 12 of a governor device 11 is connected to an intermediate fulcrum position of the governor lever 8, and this shaft 12 is connected to a sliding cylinder 14 via a governor hawk 13. For example, when the centrifugal weight 15 attached to a gear on the crankshaft side is locked and the load becomes lighter and the rotational speed increases, the centrifugal weight 15 moves outward and moves the sliding tube 14 forward, creating the Gapana Hawk. 13 and force through shaft 12”
The upper part of the putter lever 8 swings to the right to reduce the throttle valve opening.Conversely, when the load increases and the rotation speed decreases, the inward movement of the centrifugal weight 15 causes the upper part of the governor lever 8 to swing to the left to reduce the throttle. The valve opening degree is increased to maintain constant rotation control.

Next, at the lower end of the governor lever 8, a governor string 1 is attached.
A lever 18 which is swingably supported by a pin 17 is connected to the lever 18 through a pin 17, and a regulating spring 19 is connected to the lever 18 from a side substantially opposite to the pana spring 16 diagonally upward.
A speed regulating rod 20 extends through the speed regulating rod 20, and a rotation adjustment knob 21 is attached to the upper end of the speed controlling rod 20.

The rotation adjustment knob 21 has, in order from the bottom to the top, a stepped portion 22a for high-speed positioning with the smallest diameter, a stepped portion 22b for medium-speed positioning with a larger diameter, and a stepped portion 22c for low-speed positioning with the largest diameter. It is shaped like a staircase.

On the other hand, a bracket 23 is placed on the side of the engine body 1.
is attached, and a locking hole 24a with the smallest diameter, a locking hole 24b with a larger diameter than the locking hole 24a, and a locking hole 24c with the largest diameter are continuously drilled in a straight line in this bracket 23, and these locking holes are The step portion 22a is formed in the holes 24a to 24c.
22c are selectively engaged to position and hold the regulating rod 20 at three moving positions in the length direction.

Since the present proposal is configured in this way, in the case of medium-speed operation such as when starting the engine, the medium-speed position setting stepped portion 22b in the middle of the rotation adjustment knob 21 is engaged with the locking hole 24b in the middle of the bracket 23. By aligning the governor lever 8 with the governor spring 19, the lever 18, and the cabana ring 16, the governor lever 8 is positioned in the middle of its swing range. The connecting frame 9 rotates the throttle lever 10 a little to open the throttle valve a little.

Next, during low-speed operation, the rotation adjustment knob 21 is moved toward the large-diameter locking hole 24c, and the upper low-speed position setting step 22c is engaged therewith, so that the speed governor 20 is moved downward by a predetermined amount. to reduce the spring force of the regulating spring 19.

Therefore, the lever 18 swings a little toward the governor spring 16, causing the upper part of the governor lever 8 to swing to the right, thereby further pushing the connecting frame 9 and causing the throttle lever 10 to almost close the throttle valve.

Under such circumstances, at low speeds, the governor hawk 13 of the governor device 11 is separated from the sliding tube 14 and is not affected by the centrifugal weight 15, so that the governor operation is not performed.

On the other hand, during high-speed operation, the rotation adjustment knob 21 is pinched up and its high-speed position setting stepped portion 22a is engaged with the locking hole 24a.

Then, the governor lever 20 moves to the highest position and increases the spring force of the governor spring 19, so that the lever 18 swings toward the governor spring 19 and pulls the lower part of the governor lever 8 and the upper part. oscillates to the left,
In this way, the throttle valve opens and the vehicle enters the high speed range.

As a result of the swinging of the governor lever 8, the governor hawk 13 comes into pressure contact with the sliding tube 14 in the governor device 11, and the action of the centrifugal weight 15 is exerted, so that even when the rotation speed changes with the load, it is always kept constant. controlled to ensure that

As described above, according to the present invention, since the rotation adjustment knob 21 disposed at a high place on the upper part of the engine body 1 is operated by selectively engaging the hole with one touch, the location and operation itself are very simple. becomes easier.

Each speed position engages with three types of step portions 22a to 22C and can be set quickly and reliably by selective engagement of steps 24a to 24c.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the device according to the present invention, Fig. 2 is a plan view of the main parts, Fig. 3 is a perspective view of the governor device part, and Fig. 4 is a perspective view of the rotation adjustment knob part. It is a diagram. 8...Governor lever 9...Connection frame,
10... Throttle lever, 11...
Governor device, 16... Governor fling, 18
......Lever 19...Governing spring, 20...Governing rod, 21...One rotation adjustment knob, 22a to 22c... Stepped section, 24a
or 24c...Lock hole.

Claims (1)

[Scope of utility model registration request] The upper end of a scale-type governor lever having a governor device at an intermediate fulcrum position is connected to a throttle lever via a connecting culm, and the lower end of the governor lever is connected to a lever swingably supported via a governor spring. A speed control rod is provided diagonally upward from the side substantially opposite to the governor spring through the speed control spring, and a speed control rod is provided at the upper end of the speed control rod with different diameters corresponding to high, medium, and low rotational positions. A rotation adjustment knob having three consecutively arranged step portions is attached, and each step portion of the rotation adjustment knob is connected to three consecutively arranged locking holes having approximately the same diameter as the rotation adjustment knob. An engine rotation adjustment device characterized in that it is configured to selectively engage with.