JPH044249Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a swinging weight device for a mechanical governor of an engine, for example, as shown in FIG. 1 or FIG. To provide a device in which weights 2 are pivotally supported via respective support shafts 3 so as to be swingable in the centrifugal direction, and can enhance response sensitivity of a governor.

<Prior art> Generally, in a mechanical governor, weight 2
The weight is W, the distance between the weight center G and the rotation axis B of the weight holder is R, the distance between the weight center G and the support shaft center S is L, and the roller attached to the tip of the support arm 6 that pushes the governor sleeve 5 is If the distance between 7 and the center of the spindle S is D (see Figure 5 or Figure 8),
The centrifugal force F ₀ acting on the weight 2 around the rotation axis B is F ₀ = (W/g)・R・ω ²・(L/D)……(1) g: gravitational acceleration, ω: weight The angular velocity is

The moment generated at the spindle center S of the weight due to the centrifugal force F ₀ is the governor force F
This becomes the driving force that causes the governor sleeve to slide. This governor force F is a component of the centrifugal force F ₀ in the direction perpendicular to the straight line I connecting the spindle center S and the weight center of gravity G, and this If the angle at which straight line I intersects the vertical line is θ, centrifugal force
It is the product of F ₀ and sinθ.

Therefore, when the output curve P of the governor force F is drawn with respect to the length R of the rotational movement of the weight 2, it becomes as shown in FIG.

In the conventional weight device, the seventh
As shown in the figure, the weight center G is moved away from the rotation axis B (i.e., in Figure 6,
(indicates the area near where the output curve P approaches the maximum),
The swing range A of the weight 2 is defined by a reference line C passing through the center S of the support shaft 3 and parallel to the rotation axis B of the weight holder 1.
By setting the area in a region further away from the rotation axis B, the region F ₁ has a strong governor force F.
was using.

<Problems to be solved by the invention> However, in the above configuration, as shown in FIG.
Since the gradient is gentle) and the amount of change in the governor force within the swing range of the weight 2 is small, there was a problem that the response sensitivity of the governor could not be increased.

<Means for solving the problem> The present invention is intended to solve the above problem, and was proposed for the purpose of increasing the response sensitivity of the governor. This will be explained below using corresponding FIGS. 1 to 6.

That is, the swinging motion range A of the weight 2 is set at a position extending between the inside and outside of a reference line C that passes through the center S of the support shaft 3 and is parallel to the rotation axis B of the weight holder 1.

<Function> Therefore, to describe the function of the present invention brought about by the above configuration, first, as can be seen from FIG. Although the distance R becomes shorter,
Conversely, the distance L between the weight center of gravity G and the spindle center S of the weight 2 becomes longer.

Therefore, as shown in FIG. 6, the average rate of change of the portion of the output curve P that corresponds to the swing range of the weight increases (that is, the slope becomes steeper), and the governor force for a predetermined swing range of the weight 2 increases. , that is, the rate of change in the governor force F increases.

<Effects of the invention> Therefore, according to the invention, the rate of change of the governor flux becomes large, so that the response sensitivity of the governor can be increased.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 is an exploded perspective view of the swinging weight device of a mechanical governor, Figure 2 is a vertical side view of the area around the weight device in a diesel engine, Figure 3 is a vertical front view of the engine, and Figure 4 is the weight device. FIG. 2 is a front view of the device, in which a fuel injection pump chamber 20 is formed on the side wall of a diesel engine E, a fuel injection pump 21 is housed in the pump chamber 20, and the pump chamber 2
An injection pump 21 is connected to an injection camshaft 22 that extends before and after the injection camshaft.

Further, a governor shaft 8 is disposed below the pump chamber 20, and the weight device 10 is mounted after the governor shaft 8 is mounted parallel to the injection cam shaft 22.
0, the fuel adjustment rack 23 of the fuel injection pump 21 is interlocked via the governor lever 24.

That is, as shown in FIG. 1, the weight device 10 includes a cylindrical box-shaped holder base 11,
A substantially rectangular parallelepiped weight holder 1 and a governor sleeve 5 are fitted in sequence, and two weights 2 are pivoted to the weight holder 1 via a support shaft 3 so as to be swingable in the centrifugal direction.

The weight holder 1 has a shape in which left and right side walls 13 and 12 of a disc-shaped body are smoothly cut out, and a governor shaft insertion hole 14 is provided in the center thereof in the front and back direction, and a governor shaft insertion hole 14 is formed in the center part of the left and right side walls 13 and 12. , 12 (that is, the support shaft insertion hole 15 is located perpendicularly apart from the governor shaft insertion hole 14 in the vertical direction), and in this state. It is fixed to the holder base 11 and fitted onto the governor shaft 8, and a governor sleeve 5 is slidably disposed in front of the governor shaft 8.

Each of the weights 2 has support arms 6 extending vertically behind both ends of the semi-cylindrical body 16.
A pivot hole 17 is provided above, a pin 18 is supported below one of the support arms 6, and a roller 7 is rotatably supported at the inner end of the pin 18.

Then, by aligning the pivot holes 17 of both support arms 6 with the support shaft insertion holes 15 of the weight holder 1 and inserting the support shaft 3 into both holes 15 and 17, the two weights 2
are pivotably supported above and below the weight holder 1, respectively.

On the other hand, a bifurcated governor lever 24 is disposed in front of the governor sleeve 5 fitted into the governor shaft 8, and the bifurcated base 25 is pivotably pivoted on a support shaft 26 which is horizontally supported in the pump chamber 20. A roller 28 supported by a bifurcated tip 27 is configured to be able to come into contact with a front flange 29 of the governor sleeve 5.

In the governor device constructed in this way, when the engine speed increases, the rotation speed of the governor shaft 8 also increases, and the weight 2 receives a thrust in the centrifugal direction and uses the support shaft 3 as a branch to move the upper and lower ends of the weight holder 1. It opens in the direction.

Then, the weight 2 swings its support arm 6 toward the front of the governor shaft 8, and the roller 7 presses and slides the rear flange 30 of the governor sleeve 5 in the front direction.

The governor sleeve 5 that has slid forward pushes the bifurcated tip 27 of the governor lever 24 forward with its front flange 29, and the governor lever 24 that has swung around the support shaft 26 injects fuel against the tension of the governor spring. The fuel adjustment rack 23 of the pump 21 is moved to the fuel reduction side to reduce the engine speed to a predetermined speed.

Furthermore, when the engine speed decreases, the tension of the governor spring causes the governor lever 24 to move the fuel adjustment rack 23 toward the fuel increase side, thereby increasing the engine speed to a predetermined speed.

As described above, the present invention provides a governor device that adjusts the engine speed to a constant range, and a position that extends the oscillating motion range A of the weight, which is one of the elements constituting the governor device, inside and outside a predetermined reference line C. Therefore, the shape of the weight, the manner in which it is pivoted to the weight holder, etc. are not particularly limited.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention. Figure 1 is an exploded perspective view of a swinging weight device for a mechanical governor, and Figure 2 is a longitudinal cross-sectional side view of the vicinity of the weight device in a diesel engine. Figure 3 is a vertical sectional front view of the engine, Figure 4 is a front view of the weight device, Figure 5 is a schematic mechanical diagram of the weight device, and Figure 6 is the distance R between the weight center of gravity and the rotation axis.
FIG. 7 is a diagram corresponding to FIG. 4 showing a conventional example, and FIG. 8 is a diagram equivalent to FIG. 5 showing a conventional example. 1... Weight holder, 2... Weight, 3...
...Spindle, A...2 swinging range, B...1 rotation axis, C... reference line, S...3 center.

Claims (1)

[Scope of utility model registration request] In an oscillating weight device for a mechanical governor of an engine, in which a set of weights 2 are pivoted to a weight holder 1 via respective spindles 3 so as to be able to oscillate in a centrifugal direction, the oscillating motion range of the weights 2 is A swing type weight device for a mechanical governor for an engine, characterized in that point A is set at a position straddling the inside and outside of a reference line C that passes through the center S of a support shaft 3 and is parallel to the rotation axis B of a weight holder 1.