JPH1077873A - Engine with mechanical governor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of partial wear to the sliding contact face of a governor lever pivot by fitting both end parts of the governor lever pivot into a pivot insert hole and a pivot receiving hole. SOLUTION: Both end parts of a governor lever pivot 2 are respectively fitted into a pivot insert hole 7 and a pivot receiving hole 8. A connector 12 is fitted to the lead-out end of a lubricating oil pipe 11 led out of a lubricating oil passage 10 of a lubricating device 9. The connector 12 has an oil feeding hole 80 inside. A lubricating oil lead-in clearance 15 is formed between the pivot insert hole 7 and a cut-off face 14 of the governor lever pivot 2. Between the tip face 12a of the connector 12 and the tip face 2a of the governor lever pivot 2, a clearance 82 making the governor lever pivot 2 axially movable is formed in the pivot insert hole 7. The governor lever pivot 2 can thereby be rotated by energizing an oil pressure receiving face 18 or/and the cut-off face 14 with oil pressure, and partial wear can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine with a mechanical governor provided with a mechanical governor as an engine speed control device.

[0002]

2. Description of the Related Art FIG. 10 shows a prior art of an engine with a mechanical governor. In this engine with a mechanical governor, a governor lever pivot 102 is installed in a governor chamber 101, and a governor lever 104 is swingably attached to the governor lever pivot 102 via a pivot 103.

In this prior art, the governor lever pivot 102 is non-rotatably mounted in the governor chamber 101.
In the case where the sliding contact surface 119 of the pivot 103 shown in FIG. 10 (B) is in contact with the sliding contact surface 120 of the governor lever pivot 102, the governor lever pivot 1
In the sliding contact surface 120 and the sliding contact surface 119 of No. 02 (there may be a friction reducing member such as a roller or a ball bearing), uneven wear easily occurs. That is, the swing range of the governor lever 104 is determined, and the sliding contact surface 120 slides only in this swing range, so that local wear is likely to occur.

[0004]

In the above prior art, uneven wear is apt to occur on the sliding contact surface 120 and the sliding contact surface 119 of the governor lever pivot shaft 102 or the friction reducing member, and hunting or the like is caused due to a malfunction of the governor lever 104. Adverse effects are likely to occur.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an engine with a mechanical governor which is less likely to cause uneven wear on a sliding contact surface of a governor lever pivot.

[0006]

The invention of claim 1 will be described with reference to, for example, FIG. 1. Referring to FIG. 1, a governor lever pivot 2 is installed in a governor chamber 1, and the governor lever pivot 2 has a pivotal support 3 attached thereto. In a mechanical governor-equipped engine in which a governor lever 4 is swingably attached via a shaft, a shaft insertion hole 7 is formed in one of the governor chamber walls 5 facing each other so as to penetrate the governor chamber wall 5, and the other. A shaft receiving hole 8 is provided in the governor chamber wall 6, and both ends of the governor lever pivot 2 are fitted in the shaft inserting hole 7 and the shaft receiving hole 8, respectively.
Are connected in a branched shape, and a connecting tool 12 is attached to the leading end of the lubricating oil pipe 11. The connecting tool 12 is inserted into the shaft insertion hole 7.
The connector 12 is provided with an oil supply passage (for example, an oil supply hole 80), and is fitted into the shaft insertion hole 7. One end peripheral surface of the governor lever pivot 2 is fitted in the shaft insertion hole 7. A lubricating oil introduction gap 15 is formed between the cut surface 14 and the inner peripheral surface of the shaft insertion hole 7, and the lubricating oil from the oil supply passage 80 of the connector 12 is The lubricating oil receiving gap 18 is provided with a lubricating oil receiving surface 18 which rises from the cut surface 14 in the lubricating oil introducing gap 15. The governor lever 2 is rotatably driven by hydraulic pressure received on at least one of the cut surfaces 14.

The above-described second aspect of the present invention will be described with reference to, for example, FIG.
5. Only one lubricating oil pressure receiving surface 18 is provided on the peripheral surface of the end of the governor lever pivot 2. The invention of claim 3 will be described with reference to, for example, FIG.
Means is provided so that the lubricating oil from the oil supply passage 80 of the connector 12 is supplied to the lubricating oil introduction gap 15 to one side more around the axis of the governor lever pivot 2 by providing the oil supply passage 80 at an eccentric position. Characterized by the following. In addition, the hole to be eccentric may be a through hole of a disc-shaped member fitted inside the shaft insertion hole 7. The fourth aspect of the present invention will be described with reference to FIG. 1, for example, in which elastic means (for example, a resilient spring 57) for rotating the governor lever pivot 2 when the oil pressure decreases is provided.

[0008]

According to the first aspect of the present invention, both ends of the governor lever pivot shaft 2 are fitted in the shaft insertion hole 7 and the shaft receiving hole 8, respectively, and the governor lever pivot shaft 2 itself is fitted to the governor chamber walls 5.6. Since it is not fixed, the governor lever pivot 2 is rotatable. In addition, since there is provided a means for supplying more lubricating oil from the oil supply passage 80 of the connector 12 to the lubricating oil introduction gap 15 around the axis of the governor lever pivot 2, the pressure distribution of the hydraulic pressure is increased. Becomes unbalanced around the axis, and a large rotating power can be obtained.

According to the second aspect of the present invention, since only one cut surface 14, the lubricating oil introduction gap 15, and the lubricating oil pressure receiving surface 18 are provided on the peripheral surface at the end of the governor lever pivot 2, the pressure by the lubricating oil is reduced. It can sufficiently affect the hydraulic receiving surface 18 and the cutting surface 14. According to the third aspect of the present invention, the means for increasing the supply to one side is provided by providing the oil supply passage 80 at the eccentric position. There is an advantage that the configuration can be made at low cost. According to the fourth aspect of the present invention, since the elastic means 57 for rotating the governor lever pivot 2 when the oil pressure is reduced is provided, the governor lever pivot 2 is rotated not only when the oil pressure is high but also when the engine is stopped when the oil pressure is decreased. And uneven wear can be further suppressed.

[0010]

According to the first aspect of the present invention, the following (a) to (b)
It has the specific effect of (c). (A) Even if the sliding contact surface of the pivot portion is in contact with the sliding contact surface of the governor lever pivot, since the governor lever pivots, the position of the sliding contact surface of the governor lever pivot always changes, so that the governor lever pivot Uneven wear is less likely to occur on the sliding contact surface, rollers, etc., and adverse effects such as hunting due to poor governor lever operation are less likely to occur.

(B) Since there is provided a means for supplying more lubricating oil from the oil supply passage of the connecting device to the lubricating oil introduction gap to one side around the axis of the governor lever pivot, the pressure distribution of the hydraulic pressure is increased. Becomes unbalanced around the axis, and a large rotating power can be obtained. (C) Since the governor lever pivot is rotated using the oil pressure of the lubricating oil flowing through the lubricating oil passage of the lubricating device, there is no need to newly install a rotational drive device for the governor lever pivot.
It can be manufactured at low cost using existing lubrication equipment.

According to the second aspect of the present invention, the pressure of the lubricating oil from the means for increasing the supply to one side can be sufficiently applied to the lubricating oil receiving surface and the cut surface, and the diameter of the governor lever pivot shaft is reduced. Even a small one has a unique effect that it can be sufficiently rotated. Claim 3
According to the invention of (1), there is a specific effect that it can be simply and inexpensively configured. According to the fourth aspect of the invention, the governor lever pivot can be rotated well, and there is a specific effect that uneven wear can be further suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a governor shaft rotating device for an engine according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of a main part of a governor shaft rotating device of an engine.
(A) is a cross-sectional plan view of the governor chamber, and FIG. 1 (B) is FIG.
1 (A) is a sectional view taken along line BB, FIG. 1 (C) is a perspective view of an end of a governor lever pivot, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 8 is a vertical sectional side view of a governor chamber of the engine, FIG. 9 is a plan view of the engine.

The engine to which this embodiment is applied is a vertical diesel engine with a mechanical governor, and the structure thereof is as shown in FIG.
1, a cylinder head 22 is assembled, a gear case 23 is mounted on a front part of the cylinder block 21, and an engine cooling fan 24 is mounted on a front part of the gear case 23.
The one end 25 of the gear case 23 is connected to the cylinder block 21.
A pump chamber 27 containing a fuel injection pump 26 is attached to the rear of the lateral end 25 of the gear case 23, and the governor chamber 1 is attached to the rear of the pump chamber 27.

As shown in FIG. 8, a mechanical governor is accommodated in the governor chamber 1. The structure of the mechanical governor is as follows. That is, a governor lever pivot 2 is erected in the governor chamber 1, and a governor lever 4 is swingably attached to the governor lever pivot 2 via a pivotal support 3. The governor lever 4 is a spring force input lever 2
8 and a governor force input lever 29. The spring force input lever 28 is operatively connected to a speed control lever 31 via a governor spring 30. A fuel metering rack 33 of the fuel injection pump 26 is operatively connected to the governor force input lever 29 via an interlocking plate 32. The governor force input lever 29 is linked to a governor weight 35 via a governor sleeve 34. And
Spring force input lever 28 and governor force input lever 29
And the governor lever 4 is swung integrally by an unbalanced force of the spring force 36 and the governor force 37, so that the engine speed is kept constant irrespective of the fluctuation of the engine load.

As shown in FIG. 1A, each of the spring force input lever 28 and the governor force input lever 29 is formed by bending a sheet metal into a U-shape, and the governor force input lever 2 is formed.
A spring force input lever 28 is disposed inside the inner surface 9. The pivot portion 3 includes a spacer boss 38 and a pair of needle bearings 39, as also partially shown in FIG. The spacer boss 38 has a stopper ridge 4 at the center of its inner peripheral surface.
0, and a pair of needle bearings 39 fitted on both ends of the spacer boss 38 are received by stopper ridges 40 to define a separation width between the pair of needle bearings 39. The needle bearing 39 is configured by freely attaching a large number of axial rollers 42 to an outer race 41.

The pivot 3 is incorporated in the governor lever 4 as follows. That is, the spacer bosses 38 are successively inserted into the holes of both side plates 43 of the spring force input lever 28, the needle bearings 39 are inserted into the holes of the both side plates 44 of the governor force input lever 29 from the outside, and press-fitted into the spacer boss 38 from both ends. And needle bearing 39
The spacer boss 38 is friction-fixed to the outer race 41, and the outer periphery of both ends of the spacer boss 38 is widened by press-fitting to frictionally fix the spring force input lever 28 to the spacer boss 38. The governor force input lever 29 is loosely fitted to the outer race 41 of the needle bearing 39. The governor force input lever 29 is a spacer boss 38
Thus, the governor lever 4 is unitized by the pivot 3. The engine stop lever 46 is also formed by bending a sheet metal into a U-shape, and the governor lever pivot 2 is loosely fitted in a series of holes in both side plates 47.

In this embodiment, the governor lever pivot 2 can be driven to rotate in order to suppress uneven wear on the sliding contact surface 20 of the governor lever pivot 2 and the axial roller 42. This specific configuration will be described with reference to FIGS. In FIG. 1A, of the governor chamber walls 5 and 6 facing each other, a shaft insertion hole 7 is formed in one governor chamber wall 5 in a penetrating manner, and a shaft receiving hole 8 is recessed in the other governor chamber wall 6. It is open to the form. Also, both ends of the governor lever pivot 2 are inserted into the shaft insertion hole 7 and the shaft receiving hole 8.
And a lubricating oil pipe 11 is led out of the lubricating oil passage 10 of the lubricating device 9 in a branched shape.
The connecting tool 12 is attached to the leading end of the connector 1. Connector 12
Has an oil supply hole 80 as an oil supply passage therein, and a male screw 81 is engraved on the peripheral surface.

The connector 12 is inserted from the outside of the shaft insertion hole 7 and is internally fitted and fixed by being screwed into a female screw and a male screw 81 formed on the inner peripheral surface of the shaft insertion hole 7. . As shown in FIG. 1C, the governor lever pivot 2
A cut surface 14 is formed only on one side of the peripheral surface of the end portion, and a lubricating oil introduction gap 15 is formed between the cut surface 14 and the inner peripheral surface of the shaft insertion hole 7. A gap 82 is formed in the shaft insertion hole 7 between the distal end surface 12a of the connector 12 and the distal end surface 2a of the governor lever pivot 2 so that the governor lever pivot 2 can move in the axial direction. The lubricating oil flowing from the oil supply hole 80 accumulates in the gap 82 and enters from the inlet 16 of the lubricating oil introduction gap 15.

A lubricating oil pressure receiving surface 18 rising from the cut surface 14 is provided at the inner end of the lubricating oil introduction gap 15, and the governor lever pivot 2 is rotated by the oil pressure received by the lubricating oil pressure receiving surface 18 and / or the cut surface 14. It is driven. An elastic spring 57 is interposed at the end of the governor lever pivot 2 on the side opposite to the connecting tool 12, and when the hydraulic pressure of the lubricating oil decreases, the governor lever pivot 2 moves the arrow 83.
It is configured to urge to the side.

According to such a configuration, the lubricating oil pressure receiving surface 18 and / or the cut surface 14 are urged by the oil pressure from the lubricating oil passage 10 of the lubricating device 9 through the oil supply hole 80 to thereby provide the governor lever pivot shaft 2. Can be rotated, and uneven wear can be suppressed. In addition, the resection surface 14
Is formed so as not to generate a moment of rotation around the axial center of the governor lever pivot 2, the lubricating oil pressure is applied only to the lubricating oil pressure receiving surface 18 to rotate. Further, the governor lever pivot 2 is pushed into the back end of the shaft receiving hole 7 by lubricating oil pressure, so that a resilient spring 57 is housed in the back end of the shaft receiving hole 7.
At 7, the governor lever pivot 2 is supported so that the governor lever pivot 2 can rotate smoothly. Also, when the oil pressure of the lubricating oil decreases when the engine is stopped due to the presence of the resilient pressure spring 57, the governor lever pivot 2 is urged toward the arrow 83 side so that the pressure of the lubricating oil in the lubricating oil introduction gap 15 causes the governor lever pivot 2 can generate a rotational moment about the axis of the shaft 2, and can rotate the governor lever pivot 2.

Note that, as shown in FIG.
To facilitate rotating governor lever pivot 2 by biasing force 84 (not shown in FIG. 7),
A rotation-promoting pin 85 is erected on the distal end surface 12a of the connector 12 so that the governor lever pivot 2 obtains a rotational moment along the oblique lubricating oil pressure receiving surface 18 formed on the circumference. Good. In this case, in order to smoothly move the rotation promoting pin 85, the cut surface 14 is centered on the axis O.
As a circle. In the configuration of FIG. 7, when the urging force 84 is applied, the governor lever pivot 2
5 rotates in the direction in which it escapes (clockwise arrow direction 86).

In FIG. 1, the lubricating device 9 connects the suction port 49 of the lubricating oil pump 48 to the lubricating oil 51 in the oil pan 50.
The lubricating oil passage 10 is led out from a discharge port 52 of a lubricating oil pump 48, and a sliding portion 53 such as a crank bearing is connected to the lubricating oil passage 10. In addition, the cut surface 14 of the governor lever shaft 2 is triangular, and the lubricating oil pressure receiving surface 18 is inclined with respect to the central axis of the governor lever shaft 2. The lubricating oil passing through the lubricating oil introduction gap 15 as indicated by the arrow 54 pushes the lubricating oil receiving surface 18 to rotate the governor lever pivot 2 13, and the lubricating oil introduction gap 1
The lubricating oil passing through 5 passes through a gap between the peripheral surface of the governor lever pivot 2 and the peripheral surface of the shaft insertion hole 7 as indicated by an arrow 55, and leaks into the governor chamber 1 as indicated by an arrow 56.

[0024]

Second Embodiment FIG. 3 is a view for explaining a second embodiment of the present invention. The second embodiment is different from the second embodiment shown in FIGS. , Oil supply hole 80
Is opened obliquely so as to be eccentric on the distal end surface 12a of the connection tool 12. In this embodiment, a large amount of lubricating oil supplied from the lubricating device 9 is supplied to the governor lever pivot 2 on the side having the cut surface, and a large rotational moment can be obtained.

[0025]

Third Embodiment FIG. 4 is a view for explaining a third embodiment of the present invention. The third embodiment is different from the second embodiment shown in FIGS. , The distal end surface 12a of the connecting tool 12 and the governor lever pivot 2 in the shaft receiving hole.
A point at which a disc-shaped member 88 having an eccentric through-hole 87 is inserted between the end 2a of the oil supply hole 80 and a tip end of an oil supply hole 80 for efficiently supplying lubricating oil to the through-hole 87. 80a is widened. Note that a male screw is also engraved on the peripheral surface of the disc-shaped member 88. In this embodiment, the lubricating oil from the oil supply hole 80 is supplied to the gap 82 through the through hole 87 of the disc-shaped member 88, and the lubricating oil introduction gap 1 on one side is provided.
5 allows a large amount of lubricating oil to flow in and a large rotational moment is obtained. The size of the gap 82 is such that a large pressure is applied to the lubricating oil introduction gap 15 on one side and a small pressure is applied to the peripheral surface gap on the other side. Generally, the smaller the width of the gap 82, the greater the pressure difference. In this embodiment, the oil supply hole 80 formed in the connector 12 may be straight, easy to manufacture, and the size of the through hole 87,
By changing the position, there is an effect that an appropriate rotational moment can be obtained.

[0026]

Fourth Embodiment FIG. 5 is a view for explaining a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that the fourth embodiment is characterized in that A disk-shaped member 89 whose end is cut into an arc 90 instead of the through hole
This is the only point composed of In this embodiment, there is an advantage that the manufacture is simpler than in the case where the through-hole is provided, since it is sufficient to simply cut off.

[0027]

Fifth Embodiment FIG. 6 is a view for explaining a fifth embodiment of the present invention. The fifth embodiment is characterized in that a shaft receiving hole 8 is formed in the fifth embodiment. A feature is that the elastic pressure of the elastic pressure spring 57 can be adjusted by screwing into the shaft receiving hole 8 with a through hole and screwing a protrusion adjusting bolt 93 for adjusting the protrusion d by the shim 92. . According to this embodiment, there is an advantage that the rotation amount of the governor lever pivot 2 that rotates when the engine is stopped can be easily and appropriately adjusted even after the governor lever pivot 2 is attached to the governor chamber 1.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the present invention. Hereinafter, such an embodiment will be described. (1) In the above embodiment, the cut surface 14, the lubricating oil introduction gap 1
5. The case where only one lubricating oil pressure receiving surface 18 is provided on the peripheral surface of the end portion of the governor lever pivot 2 has been exemplified. However, even if the lubricating oil supply is not uniform, the rotation It is possible to increase the moment.

(2) The lubricating oil pressure receiving surface 18 rising from the resection surface 14 is not limited to the configuration inclined with respect to the axial direction of the governor lever pivot 2, but may be configured to extend parallel to the axial direction. (3) The oil pressure received on the governor lever pivot may be the oil pressure received not only on the lubricating oil pressure receiving surface 18 but also on the cutting surface 14. Further, a configuration in which a rotational moment is obtained by a difference between the oil pressure received on the lubricating oil pressure receiving surface 18 and the oil pressure received on the resection surface 14 may be employed. (4) To prevent the rotation of the governor lever pivot 2 from being suppressed by the frictional force of the resilient spring 57,
May be provided with a friction suppressing means, for example, a rotor or the like, on the contact surface (see reference numeral 2b in FIG. 6) of the governor lever pivot 2 with which the shaft comes into contact.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of an exhaust system for an engine according to the present invention. FIG. 1 (A) is a cross-sectional plan view of a governor chamber, and FIG. B sectional view, FIG.
(C) is a perspective view of the end of the governor lever pivot.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3A is a schematic view of a main part of a second embodiment, and FIG.
FIG. 3B is a view taken along line BB in FIG.

FIG. 4A is a schematic view of a main part of a third embodiment, and FIG.
4B is a view taken along line BB of FIG. 4A, and FIG. 4C is a view taken along line CC of FIG. 4A.

FIG. 5A is a schematic view of a main part of a fourth embodiment, and FIG.
FIG. 5B is a view taken along line BB of FIG. 5A, and FIG. 5C is a view taken along line CC of FIG. 5A.

FIG. 6 is a longitudinal sectional view of a main part of a fifth embodiment.

FIG. 7 is a perspective view for explaining a modified example of the first embodiment.

FIG. 8 is a longitudinal sectional side view of a governor chamber of the engine according to the embodiment.

FIG. 9 is a plan view of the engine.

FIG. 10 is an explanatory view of a main part of an engine according to a conventional technique, in which FIG. 10 (A) is a longitudinal sectional front view of a governor chamber, and FIG. 10 (B) is a sectional view taken along line BB of FIG.

[Description of Signs] 1 ... Governor chamber, 2 ... Governor lever pivot, 3 ... Pivot, 4
... Governor lever, 5/6 Governor chamber wall, 7 ... Shaft insertion hole, 8 ... Shaft receiving hole, 10 ... Lubricant oil passage, 11 ... Lubricant oil pipe, 12 ... Connector, 14 ... Removal surface, 15 ... Lubricant oil introduction Gap, 18: lubricating oil pressure receiving surface, 57: elastic spring, 8
0: Oil supply hole.

Claims (4)

[Claims] 1. A governor lever pivot (2) in a governor chamber (1).
In a mechanical governor-equipped engine in which a governor lever (4) is swingably attached to the governor lever pivot (2) via a pivotal support (3), the governor chamber walls (5.6) are opposed to each other. A shaft insertion hole (7) is formed in one governor chamber wall (5) in a penetrating manner, a shaft receiving hole (8) is provided in the other governor chamber wall (6), and both ends of a governor lever pivot (2) are pivoted. The lubricating oil pipe is inserted into the insertion hole (7) and the shaft receiving hole (8), respectively, and is passed through the lubricating oil passage (10) of the lubricating device (9).
(11) is led out in a branched shape, a connector (12) is attached to the lead-out end of the lubricating oil pipe (11), and the connector (12) is inserted into the shaft insertion hole (7) from the outside to fit inside. Secure and connect
(12) is provided with an oil supply passage (80), and a cut surface (14) is formed on a part of the peripheral surface at the end of the governor lever pivot (2) which is fitted in the shaft insertion hole (7). A lubricating oil introduction gap (15) is formed between the cut surface (14) and the inner peripheral surface of the shaft insertion hole (7), and the lubricating oil from the oil supply passage (80) of the connector (12) is The lubricating oil receiving gap (15) is provided with a lubricating oil receiving surface (14) rising from the cut surface (14) in the lubricating oil introducing gap (15). 18) to provide a lubricating oil pressure receiving surface
(18) An engine with a mechanical governor, wherein the governor lever pivot (2) is driven to rotate by hydraulic pressure received on at least one of the cut surfaces (14). 2. A cut surface (14), a lubricating oil introduction gap (15),
The engine with a mechanical governor according to claim 1, wherein only one lubricating oil pressure receiving surface (18) is provided on an end peripheral surface of the governor lever pivot (2). 3. The governor lever pivot (2) receives the lubricating oil from the oil supply passage (80) of the connector (12) to the lubricating oil introduction gap (15).
2. The engine with a mechanical governor according to claim 1, wherein the means for supplying more oil to one side around the axis of the engine is provided by providing an oil supply passage at an eccentric position. 4. The governor lever pivot when the hydraulic pressure drops
The engine with a mechanical governor according to claim 1, further comprising an elastic means (57) for rotating (2).