JP2521749Y2 - Governor for mixed-air intake engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention provides a governor for an air-fuel mixture intake engine that can reduce the settling time and reduce the instantaneous speed fluctuation rate.

<Prior Art> As shown in FIG. 1 or FIG. 3, the basic structure of a governor of an air-fuel mixture intake type engine which is the object of the present invention is as follows.
And the governor lever 2
The governor lever 2 is connected to the fuel increasing side H via a governor spring 3 so that the tension can be adjusted.
The hooks 3a and 3b at both ends of the governor spring 3 are engaged with the respective spring engagement holes 10 and 11 opened in the governor lever 2 and the governing lever 4 by being linked to the throttle lever 8 of the air mixer 7 so as to be able to open and close. The rod engaging holes 12 and 13 opened in the governor lever 2 and the throttle lever 8 are each bent engagement portions at both ends of the rod 5.
5a and 5b and each hook 6a at both ends of the pulling spring 6
This is a type configured by engaging 6b.

As a prior art of this type, as shown in FIG. 3, each hook 3a, 3b of the governor spring 3 of the side valve type gasoline engine E is engaged with the spring engagement hole 11 of the speed control lever 4 and the spring engagement of the governor lever 2. Each of the bending engagement portions 5a and 5b of the rod 5 and each of the hooks 6a and 6b of the pulling spring 6 are engaged with the rod engagement hole 12 of the governor lever 2 and the throttle lever 8 by directly contacting and engaging the peripheral wall of each hole with the hole 10. There is a rod which is brought into direct contact with the peripheral wall of each hole with the rod engaging hole 13 for engagement.

<Problem to be solved by the invention> The above-described conventional technology has the following problems.

I. Disturb governor control.

That is, the governor lever 2 is generally made of iron,
The peripheral wall of each hole also has a large friction coefficient because it is made of iron.

Also, since the inner surface of each hole peripheral wall is substantially cylindrical, each hook 3a, 3b of the governor spring 3, each bending engagement portion 5a, 5b of the rod 5, and each hook 6a, 6b of the pulling spring 6 ( Hereinafter, each hook or the like) will come into contact with the edge of the cylindrical inner surface of each hole peripheral wall.

For this reason, the frictional force at the engagement contact portion between each hole peripheral wall and each hook or the like is large, disturbing the governor control operation, the instantaneous speed fluctuation rate is large, the settling time is long, and the setting speed The error is large.

B. The rotation speed shifts to the lower side.

That is, the engagement contact portions between the peripheral walls of the holes and the hooks and the like are in contact with each other and have a large frictional force, so that the wear proceeds at an early stage.

As a result, with respect to the governing lever 4 by the amount of wear,
The position of the governor lever 2 via the governor spring 3 shifts to the fuel reduction side.

In addition, the position of the throttle lever 8 via the rod 5 with respect to the governor lever 2 is also shifted toward the fuel reduction side.

As a result, the actual rotational speed is shifted to a lower side with respect to the set rotational speed of the engine E.

It is a technical object of the present invention to eliminate disturbance of governor control operation and to prevent the rotational speed of the engine from shifting to a lower side.

<Means for Solving the Problems> Means for solving the above problems will be described below with reference to the drawings showing the embodiments.

That is, the present invention is directed to a governor of the air-fuel mixture intake type engine having the basic structure, wherein each of the spring engagement holes 10 and 11 and each of the rod engagement holes 12 and 13 are provided.
Each bush 14 is made of a material having a lower coefficient of friction than the governor lever 2, the governing lever 4, and the throttle lever 8, and a cross section of the inner peripheral surface 16 of the bush hole 15 in the axial direction A. It is characterized in that the shape is formed to be convex.

<Operation> The governor spring 3, the rod 5, and the pulling spring 6 engage with the bush 14 made of a material having a low coefficient of friction, and have high moisture at the engagement contact portion.

Since the inner peripheral surface 16 of the bush hole 15 is formed in a convexly curved shape, the hooks 3a and 3b of the governor spring 3 and the bending engagement portions 5a and 5b of the rod 5 (that is, the hooks and the like) are
Do not come into contact with each other at the edges.

Accordingly, transmission of governor force and spring force at each engagement portion of the governor is performed extremely smoothly.

In addition, the engagement contact portions between the bushings 14 and the hooks and the like have no contact, and have a small frictional force, so that wear of the engagement contact portions can be prevented.

As a result, the position of the governor lever 2 via the governor spring 3 with respect to the governing lever 4 and the position of the throttle lever 8 via the rod 5 with respect to the governor lever 2 are maintained at appropriate positions, and the It does not shift.

<Effects of the Invention> (1) Governor force and spring force transmission at each governor engaging portion becomes extremely smooth, so that governor control operation is optimized, instantaneous speed fluctuation rate is reduced, and settling time is shortened. Moreover, the error in the settling speed is small.

(2) Since the wear of the engagement contact portion can be prevented, the position of the governor lever with respect to the speed control lever and the position of the throttle lever with respect to the governor lever do not shift to the fuel reduction side.

As a result, the actual rotational speed can be appropriately adjusted to the set rotational speed of the engine.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory view of a governor of a gasoline engine, and FIG. 2 is a cross-sectional plan view of an engaging portion of a governor lever, in which a rotation speed detecting actuator 1 of a gasoline engine E is pressed by a governor lever 2 toward a fuel reduction side L. The governor lever 2 is linked to the throttle lever 8 of the carburetor 7 so that the governor lever 2 can be opened and closed via the connecting rod 5 and the pulling spring 6 in parallel.

That is, the rotation speed detecting device 1 is controlled by the governor weight 17.
Is a centrifugal type that generates a governor force by swinging in the direction of arrow B. When the governor sleeve 18 is pushed forward by the governor force, the governor fork 19 is rotated in the direction of arrow C, and the governor lever 2 is pivoted to the fulcrum 20. Arrow Q around
Swinging the throttle lever 8 on the fuel reduction side L
To rotate.

Further, the governor lever 2 is linked to the governor lever 2 via the governor spring 3 so that the tension of the governor lever 4 can be adjusted to the fuel increasing side H.

That is, the speed control lever 4 is rotatably supported on the side wall of the engine E, the speed control lever 4 is connected to an accelerator lever (not shown) via the remote wire 21, and the speed control lever 4 is connected to the accelerator lever. After positioning at a predetermined set number of revolutions, the governor lever 2 is moved by an arrow P with the spring force of the governor spring 3 around the set number of revolutions.
The throttle lever 8 is urged to rotate toward the fuel increasing side H by swinging in the direction.

On the other hand, the spring engaging holes 10 and 11 are opened in the governor lever 2 and the governing lever 4, and the bushing 14 is inserted into each of the engaging holes 10 and 11.
And hooks 3a and 3b formed at both ends of the governor spring 3 are engaged with the bushings 14, respectively.

Further, the rod engaging holes 12 and 13 are formed in the governor lever 2 and the throttle lever 8, bushings 14 are respectively fitted in the rod engaging holes 12 and 13, and the bending engaging portions 5 a. 5b and hooks at both ends of pulling spring 6
6a and 6b are engaged with each bush 14.

The bush 14 is made of a material having a lower friction coefficient than the governor lever 2, the governing lever 4, and the throttle lever 8, specifically, a synthetic resin such as nylon or PET.

As shown in FIG. 2, the bush hole 15 of the bush 14 is formed such that the cross-sectional shape of the inner peripheral surface 16 in the axial direction A is convex.

Therefore, the governor function of the gasoline engine will be described.

The governor spring 3, the rod 5, and the pulling spring 6 engage with the bush 14 made of a material having a low coefficient of friction, and have high slip at the engagement contact portion.

Since the inner peripheral surface 16 of the bush hole 15 is formed in a convex shape,
The hooks 3a and 3b of the governor spring 3 and the bending engagement portions 5a and 5b of the rod 5 (that is, the hooks, etc.)
The edges of the fourteen do not hit each other.

Accordingly, the transmission of the governor force and the spring force in each of the engagement portions of the governor is performed extremely smoothly, so that the governor control operation is optimized.

Further, since the engagement contact portions between the bushings 14 and the hooks and the like do not have a corner contact and have a small frictional force, wear of the engagement contact portions can be prevented.

As a result, the position of the governor lever 2 via the governor spring 3 with respect to the governing lever 4 and the position of the throttle lever 8 via the rod 5 with respect to the governor lever 2 are maintained at appropriate positions, and the Since there is no deviation, the actual rotational speed can be appropriately adjusted to the set rotational speed of the engine.

In addition, since the present invention is applied to an air-fuel mixture intake type engine, it can be applied to a gas engine.

In this case, the other end of the connecting rod 5 extending from the governor lever 2 is linked to the throttle lever 8 of the mixer.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a schematic explanatory view of a governor of a gasoline engine, FIG. 2 is a cross-sectional plan view of an engaging portion of a governor lever, and FIG. It is a side view of the side valve gasoline engine shown. E: engine, 1 ... rotational speed detection actuator, 2 ... governor lever, 3 ... governor spring, 3a / 3b ... 3 hooks, 4 ... governor lever, 5 ... rod, 5a / 5b ... …
Folding engagement part of 5, 6 ... Pulling spring, 6a
6b 6 hook, 7 fuel / air mixer, 8 7
Throttle lever, 10 ・ 11 …… Spring engagement hole, 12
· 13 ··· Rod engaging hole, 14 ··· bush, 15 ··· bush hole, 16 ··· 15 inner circumferential surface, A · · · 16 axial direction, H · · · fuel increasing side, L · · · fuel decreasing side .

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 58-114858 (JP, U) Japanese Utility Model Sho 61-186746 (JP, U) Japanese Utility Model Sho 61-147347 (JP, U) Japanese Utility Model Sho 60- 195942 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] A governor lever is coupled to a governor lever so that the rotational speed detecting actuator can be pressed to a fuel reduction side, and the governor lever is connected to a governor lever via a governor spring.
And the governor lever 2 is connected to the throttle lever 8 of the fuel / air mixer 7 via a rod 5 and a spring 6 in parallel so as to be capable of opening and closing. The hooks at both ends of the governor spring 3 are inserted into the spring engagement holes 10 and 11 opened in the speed control lever 4.
3a and 3b are engaged, and each bending engagement portion 5a at both ends of the rod 5 is inserted into each of the rod engagement holes 12 and 13 opened in the governor lever 2 and the throttle lever 8.
・ 5b and each hook 6a ・ 6b at both ends of the pulling spring 6
The bushing 14 is fitted in each of the spring engagement holes 10 and 11 and each of the rod engagement holes 12 and 13 in the governor of the mixture intake type engine configured by engaging the governor levers 2. Mixing characterized in that it is made of a material having a lower friction coefficient than the speed adjusting lever 4 and the throttle lever 8 and the cross-sectional shape of the inner peripheral surface 16 of the bush hole 15 in the axial direction A is convex. Governor of air intake type engine