JPH0544521A - Governon device for engine - Google Patents

Abstract

PURPOSE:To provide a governor device for engine which can arrange a governor gear and others at favourable positions by securing the length of a throttle return shaft even at a point where the internal surface of a crank case is a curved surface part. CONSTITUTION:On the protruded part of a throttle return shaft 8 facing the external side part of a crank case 7, a movable regulation means 1 to regulate rotation of this throttle return shaft 8 and the moving territory of the throttle return shaft 8 in the axial line direction is provided. Accordingly, as a protruded part 2 is not required on the throttle return shaft 8 inside of the crank case, it is not required to provide a raised face even in the case when the internal surface of the crank case comes to be a curved surface. Consequently, the length of the throttle return shaft 8 is secured, and it is possible to arrange a governor gear and others at favourable positions inside of the crank case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine governor device, and more particularly to an engine governor device suitable for mounting on a general-purpose engine or the like.

[0002]

2. Description of the Related Art First, an engine governor device will be described with reference to FIGS. Figure 4 is a side view of a general-purpose engine.
Shown in. In FIG. 4, the governor device for an engine is installed in a general-purpose engine or the like used particularly for a pump or a generator. This general-purpose engine includes a crankcase body 36, a drive unit for the engine unit 30, an exhaust unit including a muffler 37 and a fuel supply unit including a fuel tank 31.

The upper surface of the general-purpose engine in FIG. 4 is shown in FIG.
In FIG. 5, for example, in a general-purpose engine used in a pump, a state such as no load while pumping is stopped or a load during pumping occurs during use of the pump. In this case, it is necessary to stably control the output on the engine side without waste according to the load variation of the engine. Therefore, the arm 33 is rotated in the H and H'directions by the action of the engine governor device built in the crankcase in response to the load change of the engine. Then, this movement is transmitted to the carburetor 32 via the link rod 34 connected to the arm 33, and thereby the engine output is controlled.

FIG. 6 shows a sectional view taken along the line BB in FIG. Inside the crankcase 7, a governor drive gear 13 that rotates together with the crankshaft 12 and a cup-shaped governor gear 14 to which a rotational force is transmitted from the governor drive gear 13 are provided. In addition, a pair of governor weights 15 are arranged on the side surface of the inner bottom portion of the governor gear 14 along the radial direction of the governor gear. The governor weight 15 is configured to balance the centrifugal force generated by the rotation of the governor weight with the pressure of a spring (not shown). Therefore, when the two governor weights 15 open and close in the F direction according to the increase and decrease in the rotation speed of the engine (not shown) due to the centrifugal force and the force relationship between the springs,
The shifter 16 goes in and out in succession to it, and the throttle litter shaft 8 (hereinafter referred to as litter shaft), which is arranged with one end projecting outside the clan recase 7, is rotated with this operation. Becomes In FIG. 5, the arm 33 described above is locked to the protruding portion 2 of the litter shaft, and the rotation of the litter shaft 8 is transmitted to the carburetor 32 by the arm 33, so that the carburetor 3
The fuel injection amount of 2 is adjusted. As a result, the speed of the engine is adjusted so as to be a predetermined constant speed.

Next, FIG. 7 shows a partial cross-sectional view of the crankcase of the projecting portion of the return shaft of the conventional example in order to explain the mounted state of the return shaft 8. In FIG. 7A, the litter shaft 8 is provided with a shifter receiving portion 22 in which one end of a rod-shaped member made of steel or the like is bent into a substantially L shape, and the end portion is formed into a plate shape. Therefore, the straight-shaped portion of the return shaft 8 is provided so as to project from the inside to the outside of the crankcase 7 through the opening 7a provided in the crankcase 7 to the outside of the crankcase. ing.

FIG. 9 shows details of the portion C in FIG. 7 (a). In FIG. 9A, therefore, a protrusion formed by "crushing" is formed on the predetermined outer diameter portion of the litter shaft 8 located inside the crankcase 7 so that the litter shaft 8 does not move in the outward direction of the crankcase 7. A portion 8a is provided. Around the protrusion 8a, the roundness of the outer peripheral portion is deformed due to the deformation generated when the protrusion 8a is formed.

In FIG. 9B, when the protrusion 8a is brought close to the inner wall surface 7c of the crankcase 7 due to the deformation of the outer peripheral portion, the litter shaft portion around the deformation portion 8b becomes the opening 7a. Biting etc. will occur. Therefore, the retarder shaft 8 is mounted so that the inner wall surface 7c of the crankcase 7 is separated from the deformed portion 8b via the spacer 17 such as a washer between the protrusion 8a and the crankcase 7. Further, when the litter shaft 8 moves in the H direction, the protrusion portion 8a of the litter shaft contacts the spacer 17 and restricts the movement of the litter shaft after the protrusion portion 8a abuts. Also, the litter shaft 8
Is the inner wall surface 7 of the crankcase 7 via the spacer 17.
Since it is in contact with a, the protrusion 8a does not come into contact with the opening 7a and can be easily rotated.

On the other hand, in FIG. 7 (a), a washer 18 is attached to the base portion of the litter shaft projecting portion 2 outside the crankcase, and a through hole portion 19 is provided slightly above the washer 18 in the radial direction. A pin 20 is attached to the through hole 19. Further, with respect to the movement of the litter shaft 8 in the H ′ direction, the pin member 20 comes into contact with the washer 18, whereby the movement after the contact with the pin member 20 is restricted. As a result, the litter shaft 8 is restricted in the vertical axis direction, part thereof, and the rotation direction.

FIG. 8 shows the upper surface of the protruding portion of the litter shaft. In FIG. 8, a pin member 20 is attached to a through hole portion 19 provided in the base portion of the litter shaft protruding portion 2 with one end portion protruding from the outer peripheral surface. Also, this pin member 2
The pin receiving portion 21 is provided at a position facing the protruding portion 20a of 0. Therefore, when the litter shaft projecting portion 2 rotates in the direction of arrow E, the projecting portion 20a of the pin member comes into contact with the pin receiving portion 21. Therefore, the movement of the litter shaft 8 in the predetermined direction in the arrow E direction is restricted.

[0010]

However, in the engine governor device according to the above-mentioned conventional example, when the retarder shaft is arranged in the crankcase, the retarder shaft of the crankcase is prevented from moving in the outward direction of the crankcase. On the outer diameter part of the litter shaft located inside,
Protrusions are provided by "crushing". For this reason, the outer shape around the protrusion is deformed, so that the litter shaft is mounted between the protrusion and the inner wall surface of the crankcase via a spacer such as a washer. However, in FIG. 7B, when the inner wall surface of the crankcase has a curved surface, it is necessary to flatten the curved surface portion in contact with the spacer such as the washer so that the litter shaft moves smoothly.
An extra plane seat 23 was provided on the curved surface. Therefore, the shifter receiving portion of the litter shaft that is exposed to the inside of the crankcase is shortened by L corresponding to the length of the flat seat, and the positional relationship between the shifter receiving portion and the shifter that abuts is shifted. Further, when the shifter is fitted to the position of the shifter receiving portion, the position of the governor, etc. will be displaced accordingly. On the other hand, when the length of the litter shaft is increased by the length L of the flat seat, the total length of the litter shaft increases, and when the shifter receiving part and the shifter are fitted, the cabana gear part that interlocks with the shifter receiving part is the crankcase. There was an inconvenience that it interfered with the inner wall surface.

[0011]

OBJECTS OF THE INVENTION The object of the present invention is to improve the inconveniences of the prior art, and in particular, to secure the length of the litter shaft even in a place where the inner wall surface of the crankcase is a curved surface portion, which is preferable. It is an object of the present invention to provide an governor device for an engine in which a governor gear or the like can be arranged at a position.

[0012]

SUMMARY OF THE INVENTION A governor device for an engine according to the present invention is provided with a pair of governor weights which are disposed inside a crankcase and which are undulated and rotated by a predetermined centrifugal force by rotation of a crankshaft, and the governor weights. One end of the throttle return shaft is provided with a shifter that is arranged on the rotation axis of the weight and that moves in and out by the up and down rotation of the governor weight, and a throttle return shaft that is in contact with the shifter and that is rotated by the movement of the shifter. Is installed by protruding from the inner side of the crankcase to the outer side. Then, the protruding portion of the throttle return shaft on the outer side of the crankcase described above is provided with a movable regulating means for regulating the movement range of the throttle retard shaft in the rotation direction and the axial direction within a predetermined range. There is. This aims to achieve the above-mentioned object.

[0013]

By providing a movable restricting means for restricting the movable range on the return shaft projecting portion outside the crankcase, rotation of the return shaft and inside the crankcase,
Outward movement is restricted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the inside of a crankcase of a general-purpose engine equipped with an engine governor device according to an embodiment of the present invention. In the governor device for an engine of this embodiment, the return restricting portion of the return shaft 8 is not located on the outer peripheral surface of the return shuff at the two positions facing the inside and the outside of the crankcase, but the function of the movable restricting portions at these two positions is provided in the crankcase. The feature is that it is provided only in one place on the outer side.

In FIG. 1, a crankcase 7 is provided with a governor drive gear 13 that rotates together with a crankshaft 12 and a cup-shaped governor gear 14 to which a rotational force is transmitted from the governor drive gear 13. Further, a pair of governor weights (not shown) are arranged on the side surface of the governor gear 14, and the shifter 16 is moved in and out by a balance with the centrifugal force generated in the governor weight by the rotation of the governor gear 14. With this operation,
The litter shaft 8 having one end projecting outside the cran case 7 is rotated. Then, the litter shaft protruding portion 2 protruding outside the clan case 7
The washer 3, the dharma pin 5, and the pin receiving portion 6 at the base of the
The litter shaft movement restricting means is provided.

FIG. 2 shows the details of the portion A in FIG. In FIG. 2, a litter shaft 8 formed with a predetermined length is mounted so that a shifter receiving portion 22 (not shown) at one end operates in a suitable state with a shifter (not shown). Then, the washer 3 is brought into surface contact with the flat portion 7b of the clan rear case 7 at the base of the litter shaft projecting portion 2 which is set so that the shifter receiving portion (not shown) and the shifter (not shown) are at the same position. So that it is installed. Further, a through hole portion 4 in consideration of the rotation range of the litter shaft 8 is provided at an upper portion of the washer 3. Then, one end portion of the daruma pin 5 is inserted into and protruded from the through hole portion 4 so as to protrude somewhat from the outer peripheral surface of the protruding portion 2.

In FIG. 2, on the other hand, a pin receiving portion 6 formed integrally with the crankcase 7 is provided at a position facing one end of the daruma pin 5. The pin receiving portion 6 covers the daruma pin 5 and includes a side surface portion 6a horizontally confronting the daruma pin 5 and an upper surface portion 6b vertically confronting the daruma pin 5, and has a cross section having a substantially L-shaped surface portion. Has become. Therefore, when the retard shaft 8 rotates in the direction of the arrow E when the daruma pin 5 is attached to the retard shaft 8, the daruma pin 5 comes into contact with the side surface portion 6a of the pin receiving portion 6 to regulate the rotation. .. Further, when the litter shaft 8 moves axially in the direction of arrow D, the daruma pin 5 comes into contact with the upper surface portion 6b of the pin receiving portion 6 to regulate the movement. Further, when the axial line moves in the opposite arrow D'direction, the washer pin 5 comes into contact with the washer 3 and restricts this movement. In Figure 1,
The rotation and axial movement of the litter shaft 8 can be restricted only by the base of the litter shaft projecting portion 2 on the outer side of the crankcase. Therefore, it is not necessary to form a protrusion (not shown) on the litter shaft inside the crankcase.

In the above embodiment, the pin receiving portion is integrally formed with the crankcase. However, the pin receiving portion is not necessarily limited to this. If it cannot be formed, only the pin receiving portion may be formed independently and then attached to a necessary place later. An explanation of this is shown in FIG. In FIG. 3, the pin receiving portion 9 is provided with a receiving portion having a substantially L-shaped cross section at the front portion, which has a side surface portion 9a and an upper surface portion 9b similar to those in the above-described embodiment. And
The rear portion is provided with a mounting portion 9c that is bent in an L shape and is formed in a stepped shape, and is fixed to a predetermined crankcase portion by a screw member 10 from a mounting hole provided in the mounting portion 9c. In this way, since it can be configured separately from the crankcase, there is no need to change the expensive crankcase type, etc., so the cost can be kept low and manufacturing is easy.

[0019]

As described above, according to the present invention, the projecting portion of the return shaft projecting on the outer side of the crankcase is provided with a movable range in the rotational direction of the retarder shaft and in the crankcase and in the outward direction. Since the movable restricting means for restricting the return shaft is provided, it is not necessary to provide the flat seat portion even when the inner wall surface of the crankcase in which the return shaft is mounted has a curved surface. Therefore, there is an effect that the length of the litter shaft is secured and the governor gear contacting the litter shaft can be arranged at a suitable position inside the crankcase. Further, when the litter shaft portion is disassembled and assembled for disassembly and repair, the movable restricting means is disposed outside the crankcase, so that it can be easily seen. For this reason, it is possible to provide an excellent engine governor device that is unprecedented in that it is possible to prevent malfunction of the engine governor device due to forgetting to assemble the movable regulating means.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is a detailed view of part A in FIG.

FIG. 3 is an explanatory view showing a modified example in FIG.

FIG. 4 is a side view of a conventional general-purpose engine.

5 is a top view in FIG.

6 is a cross-sectional view taken along the line BB in FIG.

FIG. 7 is an explanatory view of a throttle return shaft portion of a conventional example.

FIG. 8 is a top view of the throttle retarder shaft in FIG.

9 is an explanatory view showing details of a C portion in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable restriction means 2 Projection part 7 Crank case 8 Throttle retarder shaft 12 Crank shaft 15 Governor weight 16 Shifter

Claims (3)

[Claims] 1. A pair of governor weights disposed inside a crankcase and rotated by a predetermined centrifugal force by rotation of a crankshaft, and a ruggedness of the governor weights disposed on a rotation axis of the governor weights. A shifter that moves in and out by rotation and a throttle return shaft that comes into contact with the shifter and that rotates by moving in and out of the shifter are provided. One end of the throttle return shaft projects from the inner side of the crankcase toward the outer side. In the engine governor device equipped with the above, a movable restricting means for restricting a moving range in the rotation direction and the axial direction of the throttle retarder shaft within a predetermined range is provided on the protruding portion of the throttle return shaft on the outer side of the crankcase. An engine governor device characterized by being provided. 2. The movable restricting means mounts a flat seat member having an opening at the base of the projecting portion, and the base sits somewhat above the flat seat member along the radial direction of the base. Is provided with a through hole portion, and a stopper member having a projecting portion that projects somewhat from the outer peripheral surface of the base is attached to the through hole portion, and the outer side portion of the crankcase that opposes the projecting portion of the stopper member. The governor device for an engine according to claim 1, further comprising a receiving portion that is in contact with a vertical or horizontal surface of the protruding portion. 3. A stopper member, wherein the movable restricting means includes a groove portion on an outer periphery of the base portion at a base portion of the protrusion portion, and the groove portion has a protrusion portion slightly protruding from an outer peripheral surface of the base portion. 2. The engine governor according to claim 1, further comprising a receiving portion which is mounted and which is in contact with a vertical or horizontal plane of the protruding portion, on an outer portion of the crankcase which faces the protruding portion of the stopper member. apparatus.