JPS6230084Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to improve the performance and durability of a centrifugal rocking weight type governor in which the governor shaft of the engine is pushed against the governor spring by the centrifugal rocking force of the governor weight. shall be.

In the conventional type, as shown in FIG. 7, the output arm 25a of the governor weight 25 has a semicircular contact portion 2
6 is configured to push out the neck flange 29 of the governor shaft 28 downward in the figure while swinging about the pin 27 as a fulcrum.

In this structure, the contact part 26 rubs against the neck flange part 29 with high contact pressure, so the contact surface is easily damaged and becomes rough, and large sliding resistance is generated, and the governor weight 25 is moved against the governor shaft. 28 cannot operate smoothly and the response sensitivity of the governor is poor.

Moreover, the contact surface wears out quickly and has poor durability.

Therefore, in order to eliminate the above-mentioned drawbacks, the applicant of the present invention, prior to developing the present invention, installed a transmission tool 31 on a governor shaft in a rectangular shape swingably pivoted on an output arm 30a of a governor weight 30, as shown in FIG. 32 neck collar part 3
I proposed a method in which the third person was given an interview.

In this case, when the engine's speed regulating lever (not shown) is operated from the stop position to the start position, the governor lever 38 pushes the governor shaft 32, and sometimes the rectangular power transmission device 31 moves toward the governor shaft as shown by the imaginary line. 3
In some cases, the engine may become wedged between the neck flange 33 of the engine 2 and the flange 35 of the rotary shaft 34 in an inclined state.

Furthermore, since the shoulder 36a of the leg portion 36 of the governor shaft 32 is inserted into the sliding hole 37 provided in the rotating shaft 34, the shoulder 36a of the leg portion 36 of the governor shaft 32 is inserted into the sliding hole 37 provided in the rotation shaft 34.
There is also a concern that the inner wall of the sliding hole 37 may be damaged by the step a, which may prevent smooth movement of the governor shaft 32.

The present invention was proposed in order to solve the above problem, in which a transmission device is swingably supported on the output arm of the flyweight, and the transmission device is attached to a neck groove formed on the governor shaft so that it cannot rotate relative to the transmission device. When inserted, the centrifugal rocking force of the governor weight is transmitted from the transmission tool to the neck flange that makes surface contact with the transmission tool.

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 12 is swung by a pin 13 onto a bearing 11 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. movably pivoted,
The leg portion 15a of the governor shaft 15 is slidably supported by the sliding hole 14 formed in the center of the rotary shaft 8 and the disc-shaped flange 10, and the groove portion 15b provided in an annular shape in the neck portion of the governor shaft 15 is provided as a governor shaft. The output arm 12a of the weight 12 is pushed up and the centrifugal rocking force generated by the rotation of the governor weight 12 is transmitted to the governor lever 5 in contact with the tip of the head 15c of the governor shaft 15.

The transmission structure for transmitting the centrifugal rocking force of the governor weight 12 to the governor shaft 15 is shown in FIGS. 2 and 3.

That is, a rectangular transmission tool 16 is pivotally supported on the output arm 12a of the governor weight 12 by a pin 17, and a neck groove 15b formed in an annular shape at the neck of the governor shaft 15 prevents the transmission tool 16 from rotating. The widths of the front end surface 18 and the rear end surface 19 of the neck groove portion 15b are set so as to fit into each other, and the governor shaft portion after the rear end surface 19 is formed straight to form the leg portion 15a.

Therefore, the transmission device 16 provided on the output arm 12a of the governor weight 12 is connected to the neck groove 1 of the governor shaft 15.
5b, the transmission tool 16 is attached to the governor shaft 15 so that it cannot rotate relative to the governor shaft 15. And the shoulder portion 3 of the governor shaft 36 of the conventional example and the previous example
Since the corner 19a of the rear end surface 19 corresponding to 6a always protrudes from the sliding hole 14 of the governor shaft 15, when the governor shaft 15 slides, the corner 19a of the rear end surface 19
This will not damage the governor 2's performance or response sensitivity.

In this way, when the centrifugal rocking force of the governor weight 12 is transmitted from the governor shaft 15 to the governor lever 5 that is in contact with the tip of the governor shaft 15, the governor lever 5 is rocked until it balances the tension of the governor spring 6 connected to the governor lever 5. Control fuel injection pump 3
The fuel injection amount is adjusted to keep the rotation of the engine E substantially constant.

Further, when the centrifugal rocking force of the governor weight 12 is transmitted to the governor shaft 15, the transmission tool 16 pivotally supported on the output arm 12a is moved to the neck groove portion 15b of the governor shaft 15.
Since the governor weight 12 and the governor shaft 15 rotate together, the transmission tool 16 and the neck groove 1
Sliding abrasion of the abutting portion of 5b is prevented.

In the figure, the reference numeral 20 indicates the leg portion 15a of the governor shaft 15.
The hole is provided in the hole to reduce the mass of the governor shaft 15 and improve the responsiveness of the governor.

4 to 6 show another embodiment, in which a transmission device pivoted to the output arm 12a of the governor weight 12 in the neck groove portion 15b of the governor shaft 15 is provided with a transmission device having excellent wear resistance. It is designed to be inserted through a sleeve S.

This sleeve S is separably formed in a semicircular shape, and a transmission tool 16 is attached to a part of the outer periphery of each semicircular member 21.
A fitting portion 22 is provided by cutting, and when attached to the neck groove portion 15b of the governor shaft 15, the transmission tool 1 pivotally supported on the output arm 12a of the governor weight 12
6 to prevent separation.

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

In other words, the transmission device swingably supported on the output arm of the governor weight makes flat contact with the end surface of the neck groove of the governor shaft with low surface pressure and slides smoothly. Moreover,
Since the neck groove protrudes outward from the sliding hole, the sliding hole is not damaged by the neck groove when the governor shaft is operated. As a result, the governor weight smoothly operates the governor shaft, the response sensitivity of the governor is high, the governor performance is improved, and the rotation of the engine can be controlled with high precision and stability.

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

In addition, since the transmission gear, which is pivotally supported by the output arm of the governor weight, is fitted into the neck groove of the governor shaft in a non-rotating manner, when the speed regulating lever (not shown) is operated from the stop position to the start operation position, In addition, the transmission device of the prior design example shown in FIG. 8 is completely prevented from being locked in an inclined manner, and the operation of the governor lever to increase the amount of starting fuel is ensured, so that the engine can always be started smoothly.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view of the governor device portion of a horizontal diesel engine, Fig. 2 is a side view of the centrifugal rocking weight type governor, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Figs. 4 to 6. 4 shows another embodiment, FIG. 4 is a diagram corresponding to the main part in FIG. 3, FIG. 5 is a diagram equivalent to FIG. 2, and FIG.
The figure is an exploded perspective view of the main part, FIG. 7 is a plan view of the main part showing a conventional example, and FIG. 8 is a partially cutaway plan view of the main part proposed prior to the present invention. E...Engine, 5...Governor lever, 6...
Governor spring, 8...Rotating body (rotating shaft), 1
1...Bearing, 12...Governor weight, 12a...
...Output arm, 14...Sliding hole, 15...Governor shaft,
15a... Legs of 15, 15b... Neck groove of 15, 15c... Head of 15, 16... Transmission tool, 1
8, 19... end face of 15b (18... front end face, 1
9...rear end surface).

Claims (1)

[Scope of utility model registration request] A sliding hole 14 is formed in the end surface of the rotating body 8 of the engine E, and the leg portion 15a of the governor shaft 15 is inserted into the sliding hole 14 so as to be able to slide forward and backward.
5b and the head 15c are projected outside the sliding hole 14, and the governor lever 5 is attached to the head 15c with the governor spring 6.
While the neck groove part 15 is pressed toward the retreating side with the tension of
b is configured to be pressed toward the advancing side by a governor weight 12, the governor weight 12 is pivotally supported on a bearing 11 fixed to the rotating body 8 so as to be able to freely swing centrifugally, and a transmission tool 16 is attached to the output arm 12a of the governor weight 12. The transmission tool 16 is fitted between both end surfaces 18 and 19 of the neck groove part 15b in a non-rotating manner, and the neck groove part 15
A centrifugal rocking weight type governor for an engine, characterized in that a transmission tool 16 is brought into contact with a flat head side end surface 18 of the engine.