JPS6230085Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a centrifugal rocking weight type governor device that pushes the governor shaft of an engine against a governor spring using the centrifugal rocking force of a governor weight, and aims to improve governor performance and durability. purpose.

In the conventional type, as shown in FIG. 6, the output arm 25a of the governor weight 25 has a semicircular contact portion 2
5b is configured to push out the neck flange 27 of the governor shaft 26 downward in the figure while swinging about the pin 29.

In this structure, the abutting portion 25b rubs against the neck flange 27 with a high surface pressure, so the abutting surface is easily damaged and becomes rough, and large sliding resistance is generated, causing the governor weight 25 to rub against the governor shaft 27. cannot operate smoothly and the response sensitivity of the governor is poor.

Moreover, the contact surface wears out quickly and is inferior in durability.

The present invention was proposed in order to solve the above-mentioned drawbacks, and the present invention is such that the output arm of the governor weight has a transmission device in flat contact with the flange of the governor shaft.

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

FIG. 1 is a cross-sectional plan view showing the structure of a governor device portion of a horizontal diesel engine.

A governor device 1 for this engine E is composed of a centrifugal governor 2, a governor lever 5 and a governor spring 6 that control a control rack 4 of a fuel injection pump 3 in conjunction with the centrifugal governor 2.

In the centrifugal governor 2, a governor weight 11 is swingably mounted on a bearing 10a of a disc-shaped flange 10 formed on the pump chamber 9 side of a rotating shaft (rotating body) 8 rotatably supported on a crankcase 7. Pivotally supported, rotating shaft 8
and a disc-shaped flange 1 provided on the neck of the governor shaft 13, with the leg 13a of the governor shaft 13 slidably supported in the sliding hole 12 formed in the center of the disc-shaped flange 10.
6 is pushed up by the output arm 11a of the governor weight 11.

The part of the output arm 11a that comes into contact with the governor shaft 13 and performs a push-up operation has a rectangular transmission device 14 pivotably supported by a pin 15, as shown in FIGS. 1 to 3. There is. And this transmission tool 1
The front surface (plane) 14a of the governor shaft 13 is brought into contact with the disk-shaped neck flange 16 of the governor shaft 13, and the governor shaft 13 is brought into balance with the tension of the governor spring 6 by resisting the tension of the governor spring 6. Governor shaft 13 until
It is starting to push up. Also, output arm 1
A stopper 17 in the form of a slope is formed on 1a to prevent excessive rocking of the transmission tool 14.

In this way, the governor lever 5 is controlled so that the governor force F and the set tension of the governor spring 6 are always balanced, and the discharge amount of the fuel injection pump 3 is controlled, so that the engine speed is maintained at the set speed. .

At this time, the output arm 11a of the governor weight 11
The transmission device 14 provided on the neck flange 16 of the governor shaft 13
Since the plane 14a is in contact with the transmission tool 14 and the frictional force at the contact portion is large, there is no relative rotation between the transmission tool 14 and the neck collar 16, and the governor shaft 13 is in contact with the transmission tool 14.
Since it rotates integrally with the handle, abrasion at the contact area is prevented.

The interlock between the governor shaft 13 and the governor lever 5 is achieved by a cap 1 which is pivotably supported on the tip 5a of the governor lever 5 by fitting a rolling bearing 18 made of a bearing into the head 13b of the governor shaft 13.
9 is externally fitted onto a rolling bearing 18, the rotation of the governor shaft is absorbed by the rolling bearing 18, and only the forward and backward movement in the axial direction is transmitted to the governor lever 5.

In addition, what is shown in FIG. 4 and FIG. 5 is a rectangular shape pivotably supported on the output arm 11a when the start operation lever (not shown) is suddenly operated from the engine stop position to the start position. As shown by the imaginary line in FIG. 2, there is a risk that the transmission tool 14 may be clamped and fixed in an inclined state between the disc-shaped flange 10 of the rotating shaft 8 and the neck flange 16 of the governor shaft 13. It eliminates the

That is, in the case shown in FIG. 4, the corner 20 far from the stopper 17 and the contact plane 14a of the transmission device 14 pivotably supported on the output arm 11a is connected to the arcuate surface 24.
When the transmission tool 14 is about to be sandwiched between the disc-shaped flange 10 of the rotating shaft 8 and the neck flange 16 of the governor shaft 13, the circular arc surface formed on the transmission tool 14 24 slides on the disk-shaped flange 10 of the rotating shaft 8, and there is no possibility that the transmission tool 14 will be clamped and fixed in an inclined shape.

What is shown in FIG. 5 is a corner 2 of the transmission device 14 pivotably supported on the output arm 11a, opposite to the plane 14a that contacts the neck flange 16 of the governor shaft 13.
A contact portion 23 is formed so as to protrude from the output arm 11a to the outside of the virtual swing surface 22 of 0, 21.
The transmission tool 14 is configured to be rotatable even when the transmission member 14 is in contact with the disk-shaped flange 10 of the rotating shaft 8.

Since the present invention is configured and operates as described above, it has the following effects.

In other words, the transmission device, which is swingably supported on the output arm of the governor weight, makes flat contact with the neck flange of the governor shaft with low surface pressure and slides smoothly, so that the governor weight smoothly operates the governor shaft. The governor's response sensitivity is high, the governor performance is improved, and the engine rotation can be controlled with high accuracy and stability.

Moreover, since the transmission gear and the neck flange slide smoothly on a wide surface with low surface pressure, the sliding surface hardly wears out even over a long period of time, greatly improving its durability. . This enables continuous operation without inspection for, for example, 10,000 hours.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional plan view showing the governor device of a horizontal diesel engine, Figure 2 is an enlarged view of the main parts, and Figure 3 is an enlarged view of the main parts.
The figure is an exploded perspective view of the governor weight, FIGS. 4 and 5 are views corresponding to FIG. 2 showing other embodiments, and FIG. 6 is a plan view of main parts showing a conventional example. E...Engine, 5...Governor lever, 6...
Governor spring, 8...Rotating body (rotating shaft), 1
0a...Bearing, 11...Governor weight, 11a
...Output arm, 12...Sliding hole, 13...Governor shaft, 13a...13 leg, 13b...13 head, 14...Transmission tool, 14a...14 plane, 1
6... Neck collar, 17... Stopper, 20, 21
. . . corner, 22 . . . virtual swing surface, 23 . . . contact portion, 24 .

Claims (1)

[Claims for Utility Model Registration] 1. A sliding hole 12 is formed in the end face of the rotating body 8 of the engine E, and the leg portion 13 of the governor shaft 13 is formed in the sliding hole 12.
a so that it can slide forward and backward, the neck flange 16 and head 13b of the governor shaft 13 protrude out of the sliding hole 12, and the governor lever 5 is pressed against the head 13b in the backward direction by the tension of the governor spring 6. For,
The neck flange 16 is configured to press the governor weight 11 toward the advancing side, and the governor weight 11 is pivoted to a bearing 10a fixed to the rotating body 8 so as to be centrifugally swingable. A centrifugal rocking weight type governor device for an engine, characterized in that a transmission tool 14 is swingably supported, and the transmission tool 14 is brought into contact with a neck collar portion 16 at a plane 14a. 2. In the centrifugal rocking weight type governor device for an engine described in claim 1 of the utility model registration claim, the transmission tool 14 is formed in a quadrangular shape, and the imaginary corner portions 20 and 21 on the opposite side from the contact plane 14a are A contact portion 23 is provided to protrude from the output arm 11a to the outside of the swinging surface 22.