JPS6022405Y2 - Flyball type governor device - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a flyball type governor device.

As is well known in the art, flyball type governor devices are widely used in internal combustion engine governor devices, and are characterized by a small number of parts, a simple structure, and a low failure rate.

By the way, in the above-mentioned governor device, the fly ball is caused to revolve from the steel ball, but in the past, the fly ball was guided by a linear guide groove in the radial direction.

Problems to be Solved by the Invention For this reason, in the above-mentioned conventional governor device, the flyball must move in the radial direction due to centrifugal force while receiving force in the rotational direction due to revolution, making it somewhat unresponsive. It has the disadvantage of poor performance, making it unsuitable for governor devices that require sensitive performance.

The object of the present invention is to provide a flyball type governor device with excellent responsiveness.

Means for Solving the Problems In order to achieve the above objectives, the features of the present invention are as follows:
Each guide groove 7.7' is inclined with respect to the radial direction of the transmission body so as to move toward the rear side in the rotational direction of the transmission body toward the outer peripheral end.

Embodiment Hereinafter, a first embodiment of the present invention will be described based on the drawings of FIGS. 1, 2, and 6. Reference numeral 1 denotes a rotating shaft, which corresponds to an appropriate rotating shaft of the engine.

A gear 2 is a driving gear for the rotating shaft 1.

In addition, when the rotating shaft 1 is a crankshaft, the gear 2 naturally becomes a crank gear and is for driving other rotating shafts.

Reference numeral 3 denotes a sleeve, which is shaped like a bowl and is fitted onto the rotary shaft 1 so as to be slidable in the axial direction, and its bowl-shaped recess faces one side of the gear 2 .

Reference numeral 4 denotes fly balls, which are interposed between the gear 2 and the bowl-shaped recess of the sleeve 3 in appropriate numbers, and are allowed to freely revolve around the guide tool 5.
is being restrained.

The guide tool 5 is fixed to the gear 2 with studs 6 or the like so as to rotate together with the gear 2, and the gear 2 and the guide tool 5 etc. constitute a transmission body.

Guide grooves 7 for guiding the fly balls 4 are radially opened in the guide tool 5 in the same number as the fly balls 4.

The guide groove 7 extends from the center side of the guide tool 5 to the outer periphery, and is formed to penetrate in the axial direction of the guide tool 5.
The outer periphery of the guide tool 5 is also opened radially outward.

The guide groove 7 is inclined with respect to the radial direction of the transmission body so as to move toward the rear side in the rotational direction of the guide tool 5 as it goes toward the outer peripheral end.

For example, as shown by the imaginary line in FIG. 2, a conventional guide groove 10 in the radial direction is assumed to be in the guide tool 5, and the center side end of the guide groove 7 is aligned with the guide groove 10. In this case, the groove center line of the guide groove 7 forms an angle of θ with respect to the groove center line XX of the conventional guide groove 10.

Before analyzing the operating state of the first embodiment shown in FIGS. 1 and 2 with reference to FIG. 6, let us briefly explain the conventional radial straight groove type. As shown in FIG. 5, an F force is generated with the accelerated rotation of the gear 2, and the directionality of this F corresponds to the tangential direction on the circumference centered on X and passing through the contact point of the fly ball 4.

This F is the total force of the gear 2 trying to push the fly ball 4 at an accelerated rate. Therefore, this total force F causes a received force -F in the opposite direction on the fly ball 4 side, and the absolute value of this force is the The couple of forces on the ball 4 is ignored at this time, and the centrifugal force is not considered because the acceleration is instantaneous and the responsiveness is the issue here. .

In this way, under the −F force acting in a state of instantaneous acceleration,
The movement of the fly ball 4 is influenced by the component forces shown.

In other words, -F is divided into FX and Fy. In this case, Fx indicates a force perpendicular to the longitudinal direction of the guide groove 7, and Fy indicates a force in the longitudinal direction of the groove, but the guide groove 7 is directed in the radial direction. The force that substantially acts on the fly ball 4 by following is Fy.

Since the directionality of Fy in this case is toward the proximal end of the groove,
During acceleration, the force does not act to positively push the fly ball 4 in the outer radial direction, but rather acts in the opposite direction, so the ball 4 only responds when the centrifugal force is sufficiently applied.

Therefore, the instantaneous response performance of the fly ball 4 is poor, and is insufficient to make full use of the governor performance.

Furthermore, since the guide groove 7 responds to the conical slope of the sleeve 3 along a straight line in the radial direction passing through the center X, its resistance tends to increase, which also causes a loss in the responsiveness.

On the other hand, the so-called inclined guide groove 7 shown in the first embodiment produces a unique effect as shown in the analysis diagram of FIG.

In other words, the directionality of the total force of the pushing force is of course the same as before, but it is obvious that the directionality of the component force of the car F acting on the fly ball 4 due to this total force F is significantly changed by the inclined guide groove 7. This is a difference.

That is, as shown in Fig. 6, the total force of <-F is Gx and Gy
Since GX is perpendicular to the guide groove 7, it does not act on the ball 4 in the same way as described above, but Gy acts as a force that pushes out the fly ball 4 along the guide groove 7.

The fly ball 4 is pushed out in a responsive manner by this Gy force, and the sleeve 3 responds in the axial direction due to the cam action of the conical surface.

Based on the above-mentioned force relationship, this relationship provides exactly the same response performance even during deceleration.

In this case, ay appears as a force in the direction of the proximal end of the groove.

Moreover, if the guide groove 7 is inclined as in this embodiment,
Since the center of this groove and the radial line of the sleeve 3 are in an oblique relationship, there is less resistance as in the conventional example described above, and the fly ball 4 operates diagonally with respect to the radial line of the sleeve 3. This results in even better responsiveness.

After this response, centrifugal force actually acts.

In addition, as long as the guide groove 7 is inclined with respect to the radial direction of the transmission body so that it moves toward the rear side in the rotational direction of the transmission body (gear 2 and guide tool 5) as it goes toward the outer peripheral side end. ,
The above effects are achieved regardless of the magnitude of the inclination angle.

In the first embodiment, the transmission body was composed of the gear 2 and the guide tool 5, but the transmission body could be composed of the guide tool 5 and a member that rotationally drives the guide tool 5 without using a gear. You may.

3 and 4 show a second embodiment of the present invention,
The transmission body does not have a guiding tool as a component, and the gear 2'
It consists only of

Although the gear 2' is provided with a guide groove 7' and the sleeve 3 has a simplified form, the movement of the fly ball 4 itself is exactly the same as in the first embodiment. It has the same effect as the example.

Note that 10' is an imaginary conventional guide groove, and the line X--X in the case of this second embodiment also indicates the groove center of the conventional linear guide groove, as described above.

Effects of the Invention As detailed above, in the present invention, each guide groove is inclined with respect to the radial direction of the transmission body so that it moves toward the rear side in the rotational direction of the transmission body as it goes toward the outer peripheral side end. Therefore, compared to a conventional type governor device in which the mass of the fly ball, rotation radius, and revolution speed are the same, the response can be improved, and it is suitable for applications with severe load fluctuations or applications where speed fluctuation rate is strictly required. It is highly effective, and the cost is no different from that of the conventional type, so it is highly practical, and a governor device that is inexpensive, stable, and responsive can be obtained, and is of great benefit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the present invention, and FIG. 2 is a sectional view of a main part of FIG. 1. FIG. 3 is a sectional view of a second embodiment of the present invention;
4 is a cross-sectional view of the main part of FIG. 3, FIG. 5 is an analytical view of the conventional example, and FIG. 6 is an analytical view of the first embodiment. 1... Rotating shaft, 2, 2'... Gear
3, 3'... Sleeve, 4... Fly ball, 5... Guide tool, 7, 7'...
Guide groove.

Claims (1)

[Scope of utility model registration request] Transmission bodies 2.2', 5 are fixedly installed on the rotating shaft 1, and sleeves 3, 3' are arranged opposite to one side of the transmission bodies 2.2', 5.
externally fitted onto the rotating shaft 1 so as to be able to slide freely in the axial direction,
In the portions of the transmission bodies 2.2', 5 facing the sleeves 3, 3', guide grooves 7, 7' are provided which open on the sleeve 3.3' side and extend from the center side to the outer peripheral side of the transmission body. A plurality of fly balls 4 are arranged in a radial manner, and each guide 17.7' contacts the sleeves 3, 3', and rotates the fly balls 4 that slide the sleeves 3° 3' in the axial direction as the rotational speed of the transmission body increases or decreases. In the flyball type governor device that is freely provided, each guide R7, 7
A flyball type governor device, characterized in that ' is inclined with respect to the radial direction of the transmission body so as to move toward the rear side in the rotational direction of the transmission body toward the outer peripheral side end.