JPS63314325A - Governor device for internal combustion engine - Google Patents

Abstract

PURPOSE:To reduce sliding resistance in a governor lever as well as to aim at the miniatruization of a governor weight by using a rolling bearing as a bearing member, supporting a shaft of the governor lever free of rocking motion, while feeding this bearing member with lubricating oil forcedly. CONSTITUTION:A governor lever shaft 20 is horizontally attached to each of boss parts 21 and 21' installed at both sides of a governor case 12. And, on the circumference of this governor lever shaft 20, rolling bearings 22 and 22' such as a symmetrlcal pair of needle bearings, etc., are inserted thereinto at the spcified interval. In addition, a tension lever 23 and a gorvernor lever 24 both are rotatably supported by these rolling bearings 22 and 22'. On the other hand, in the central part of the governor lever shaft 20, there are provided with plural drill holes 31 and 32 being orthogonalized with each other. With this constitution, lubricating oil to be fed to an oil hole 34 of the governor case 12 from a tube fitting 33 is lubricated to these rolling bearings 22 and 22' through each of these drill holes 31 and 32.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a governor device for an internal combustion engine, and more particularly to the governor device, which makes it possible to downsize the governor weight by reducing the sliding resistance of the governor lever. be.

(Prior art) A governor device attached to an internal combustion engine such as a diesel engine automatically increases or decreases the injection amount of the fuel injection pump to maintain the engine speed at the required value when the engine load changes suddenly. It is intended to be maintained.

Therefore, as a conventional governor device for an internal combustion engine, for example, as shown in FIG. 5, a plurality of governor weights (3 ) is supported in a swingable manner, and the centrifugal force acting on the governor weight (3) is generated as governor force (F) by a governor slidably inserted at the end of the camshaft (1). It acts as a sliding force for the sleeve (4).

Further, the upper end of a governor lever (6) rotatably supported by a governor lever shaft (5) is attached to a rack pin (not shown) that determines the fuel injection amount of the fuel injection pump via a link member (7). The lower end (6a) of the governor lever (6) is connected to the governor sleeper (4).
) is in contact with the end face of the

The governor lever (6) engages with a tension lever (QO) which is rotatably biased by a regulator spring (9) whose biasing force can be adjusted and which is stretched between the governor lever (6) and a regulator lever (8) for setting the rotational speed. Since the governor sleeve (4) is biased in the same direction, the thrust force (
F) and the tensile force (f) of the regulator spring (9)
The angle of the governor lever (6) is determined at the point where these are balanced, and the injection amount of the fuel injection pump that is appropriate for the load is determined.

(Problems to be Solved by the Invention) However, the governor lever (6) built into such a conventional governor device generally has a plain metal bearing (M) in its middle portion fitted onto the outer periphery of the governor lever shaft (5). Since these are supported by a fixed part such as a governor case through the connector, and these are in surface contact with each other, there is a problem of high sliding resistance, poor response to load fluctuations, and poor operation such as hunting. . Therefore, in conventional mechanical governor devices of this type, this is prevented by increasing the mass of the governor way l-(3) and increasing the inertial force.
In this case, since a large governor weight (3) is used, there is a problem in that the overall size of the governor device is increased, and there remains room for immediate improvement in this respect.

The present invention has been made by paying attention to the problems that such conventional mechanical governor devices had, and uses a rolling bearing such as a needle bearing with low resistance as a bearing member that supports the governor lever, and uses a rolling bearing such as a needle bearing with low resistance. By applying forced lubrication, the sliding resistance of the governor lever can be greatly reduced, making it possible to downsize the governor weight, thereby solving the above-mentioned problems.

(Means for solving the problems) The structure of the present invention for achieving the above object is shown in attached drawing 1.
The figure and FIG. 2 will be explained.

In the governor device of the present invention, the governor lever (24) is supported by a fixed part u9 of the governor case etc. through bearing members (22) and (22)' fitted into the governor lever shaft (2 and the governor lever shaft I20). The bearing members (22), (22)' are composed of rolling bearings such as needle bearings, and the bearing members (22), (22)' are not supplied with lubricating oil during engine operation. Forced lubrication means for constantly supplying lubrication is provided.

(Function) In the governor device of the present invention having the above-mentioned configuration, the governor lever (24) moves the fuel injection pump CP along with engine load fluctuations.
When the governor weight swings to increase or decrease the fuel injection amount, the thrust of the governor weight is small because the bearing members (22) and (22)' are made of rolling bearings such as needle bearings with low resistance. Even in this case, the response performance is good, and this makes it possible to use a small governor weight, making it possible to downsize the entire device.

(Example) Hereinafter, specific contents of the present invention will be explained in detail based on the accompanying drawings.

FIG. 1 is a side sectional view showing an example of a governor device according to the present invention, FIG. 2 is a longitudinal sectional view of the same governor device, and FIG. 3 is a plane sectional view taken along the line -■ in FIG. 1.

In these figures, Ql) is the pump casing housing the fuel injection pump (P), and Oz is the pump casing α.
a governor case fixed adjacent to υ, the inner space of the governor case (2) and the pump casing aD;
The internal space is the upper through hole Oj and the lower oil hole α0.
are connected to each other by.

One end of the camshaft 06 supported by the pump casing αυ via a bearing 09 protrudes from the lower part of the governor case 0, and a governor support α
A governor weight 0 spring is supported so as to be able to swing open via η, and the governor weight a is attached to the tip (16a).
A governor sleeve 09) that slides as υ is opened and closed is inserted.

Q is a governor lever shaft inserted horizontally into the boss portions (21) and (21)' provided on both sides of the governor case (2), and there are a pair of left and right on the outer periphery of the governor lever shaft (2111). Needle bearings (22), (2
2)' are fitted and inserted at predetermined intervals, and a tension lever (23) and a governor lever (24) are rotatably supported by the needle bearings (22) and (22)', respectively.

The tension lever (23) has an abbreviated shape,
Governor spring (25) with adjustable biasing force at its upper end
The lower end of the governor lever (24) is pressed toward the governor sleeve (19) at the lower end that is close to and opposite to the governor sleeve Q91. Starter spring (
26).

On the other hand, the governor lever (24) is as shown in FIG.
Its lower half has a U-shaped cross section surrounding the lower half of the tension lever (23), and its upper end surrounds the lower half of the tension lever (23).
) and a link member (28) to a rack pin (29) that sets the injection amount of the fuel injection pump (P), and an engager (30) that comes into contact with the governor sleeve Om at the lower end. Equipped with

The governor lever shaft (2) has a long drill hole (31) along the axis in its center, and a drill hole (32) that intersects at right angles with the drill hole (31). Pipe fitting (33) screwed onto the outer surface of the governor case (2)
) is supplied to the drilled hole (31) through the oil hole (34) provided in the governor case (2). Lubricating oil for the main gear lary, etc. is supplied from the drilled hole (32) to the needle bearing (22).
.

After the lubricating parts of (22)' are lubricated, the oil jet hole (
35) to the engager (30) and governor sleeve 09)
It is designed to be sprayed towards the point of contact with the

In the figure, (36) is a control lever that increases or decreases the tension of the governor spring (25), (37) is a fuel limiter attached to the governor case (2) facing the tension lever (23), and (38) is a control lever that increases or decreases the tension of the governor spring (25). (39) is a maximum rotation limit bolt that limits the rotation angle of the control lever (36), and (39) is a stop lever that engages with the governor lever (24) and tension lever (23) and forcibly rotates them in the fuel decreasing direction. It is. Note that the governor weight α is slightly smaller than that used in the conventional governor device as shown in FIG. (2
) is also made smaller accordingly.

The governor device of the present invention has a ridged configuration, and its function will be explained next. First, during engine operation, the governor lever (24) and tension lever (23) swing together due to load fluctuations. When moving,
These are needle bearings (22) and (22)'
It is rotatably supported by the governor lever shaft QΦ via the governor lever shaft, and the sliding resistance is lower than that of conventional governor devices, so it has good responsiveness to load fluctuations and does not cause malfunctions such as hunting. do not have.

Also, during engine operation, lubricating oil is pumped by an oil pump (not shown) from the pipe joint (33) through the oil hole (34) and the drill holes (31), (32) at all times to the needle bearings (22), (22)'. The needle bearings (22) and (22)' are lubricated to prevent wear and tear, and a portion of the lubricating oil is also supplied to the jet holes (35).
The water is sprayed onto the contact area between the governor sleeve Q91 and the engagement element (30) to prevent wear of this area.

In addition, the lubricating oil accumulated at the bottom of the governor case (b) is splashed onto each part of the governor device as the governor weight Ol rotates, and the overflowing oil is poured into the oil hole Q41 provided in the pump case aD. It passes through and is collected in the oil pan.

FIG. 4 shows another embodiment of the governor device of the present invention.

That is, in the governor device of this embodiment, the cam (40) provided on the camshaft 06) drives a simple oil pump (41) provided in the oil reservoir at the bottom of the pump casing 0υ, and from the oil pump (41) The oil holes (42), (4) provided in the pump casing aυ and the governor case (2)
3) and the drill hole (31 in the governor lever shaft (2111)
), (32) through needle bearing (22)
, (22)' is filled with lubricating oil, and furthermore, the lubricating oil is injected downward from a jet hole (35) provided in the tension lever (23), thereby omitting external piping.

Note that the oil pump (41) has a pump casing α
Center hole (45) of pipe bolt (44) screwed into the bottom of υ
The piston (
47) and the screw screwed into the bottom end! (48
) and the ball valve (49).
) has a built-in check valve mechanism configured by the piston (47) by rotation of the cam (40).
) moves up and down, the horizontal hole (51
) into the center hole (45) is compressed, pushes the ball valve (49) open, and flows through the hole (52) into the oil hole (4).
2).

In the drawings, parts with the same reference numerals as those in FIGS. 1 to 3 indicate the same members and parts, respectively.

As in the case described above, the governor device with the above configuration has extremely low rotational resistance of the governor lever (24) and tension lever (23) due to the action of the needle hair rings (22) and (22)', and has good speed control performance. In addition to this, the needle bearings (22), (22)' and other main lubricating parts are constantly forcibly lubricated, so there is little mechanical wear and the durability life is greatly extended.

(Effects of the Invention) As described above, the governor device of the present invention uses a rolling bearing such as a needle bearing as the bearing member that supports the governor lever, and has a forced lubrication means that constantly lubricates the bearing member with lubricating oil. Since the rotational resistance of the governor lever is minimized, even when a small governor weight is used, sufficiently good response can be achieved, and the governor device can be downsized. At the same time, it has the excellent effect of improving the durability of the bearing member and making maintenance easier.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an example of a governor device according to the present invention, FIG. 2 is a longitudinal sectional view of the same governor device, FIG. 3 is a plane sectional view taken along the line mm in FIG. 1, and FIG. 5 is a side sectional view showing another embodiment of the governor device of the present invention, and FIG. 5 is a side sectional view showing an example of a conventional governor device. (2)...Fixed part (governor case), (20)...
Governor lever shaft, (22), (22)'...1 dollar bearing on the bearing member), (24)...Governor lever. Figure 1 Figure 2 Figure 3 Figure 4 ' Figure 5

Claims (1)

[Claims] 1. In a governor device in which a governor lever is swingably supported by a fixed part such as a governor case via a governor lever shaft and a bearing member fitted into the governor lever shaft,
A governor device for an internal combustion engine, characterized in that a rolling bearing such as a needle bearing is used as the bearing member, and the bearing member is equipped with forced oil supply means for constantly supplying lubricating oil during engine operation.