JP2884309B2 - Governor force transmission device for centrifugal governor of engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a governor force transmitting device for a centrifugal governor of an engine, and more particularly to a governor force transmitting device for controlling a governor force transmitting from a governor weight to a governor lever to improve governor accuracy.

[0002]

BACKGROUND OF THE INVENTION The basic structure of a governor force transmission device of a centrifugal governor of an engine to which the present invention is applied is, as shown in FIG. 1, FIG. 6 or FIG. The governor pin 3 is provided, and the governor pin 3 is configured to be able to move forward and backward along the axis A of the governor shaft 1 by swinging of the governor weight 2, and the governor lever 4 is pivotably supported by the engine E so that the governor pin 3 can swing. The governor 5 faces the input portion 6 of the governor lever 4 so as to be able to come into contact with the governor lever 4, and the governor force GF generated by the swing of the governor weight 2 can be transmitted to the governor lever 4 via the governor pin 3.

[0003]

2. Description of the Related Art In the governor force transmitting device, a governor pin 3 is pressed by a governor weight 2 while rotating on a governor shaft 1 to transmit a governor force GF to a governor lever 4. And co-rotate with the governor shaft 1 by the frictional force. on the other hand,
Since the governor lever 4 only swings and does not rotate, the transmission portion of the governor force GF between the output portion 5 of the governor pin 3 and the input portion 6 of the governor lever 4 is easily worn by friction.

Therefore, there are prior arts 1 and 2 for preventing abrasion of the transmission portion. That is, in the prior art 1, as shown in FIG. 6, a tip output portion 5 of a flanged rod-shaped governor pin 3 is formed of high-speed steel 50, or a super-hard tip is attached to the output portion 5. is there.

[0005] Further, as shown in FIG.
The steel ball 51 is rotatably mounted on the tip output section 5 of the governor pin 3.

[0006]

In the prior art 1 described above,
There is no change in the point at which the high-speed steel 50 contacts the non-rotatable governor lever 4, and the wear of the transmission portion is delayed, and the fundamental solution cannot be solved. Cannot be prevented.

In the above-mentioned prior art 2, since the center of rotation of the steel ball 51 is close to the contact point of the governor lever 4, it is difficult to rotate the steel ball 51 relative to the governor shaft 1. For this reason, the steel ball 51 is worn and the action point of the output portion 5 on the governor pin 3 side with respect to the input portion 6 of the governor lever 4 changes, and the transmission of the governor force GF from the governor pin 3 to the governor lever 4 is disturbed. Accuracy decreases. An object of the present invention is to suppress abrasion of a governor force transmitting portion from a governor pin to a governor lever to enhance governor accuracy.

[0008]

Means for achieving the above object will be described below with reference to FIGS. 1 to 5 showing an embodiment. That is, the present invention relates to a governor force transmitting device for a centrifugal governor of an engine having the above basic structure, wherein the flat surface 7 is pressed against the front end edge of the output portion 5 of the governor pin 3 and the axial center A is provided.
The input portion 6 of the governor lever 4 is provided with a receiving bearing 8 via a pivot shaft 10, and the pressing flat surface 7 of the governor pin 3 is received by the outer race 30 of the receiving bearing 8. It is characterized by being eccentric from the axis A so as to be able to contact.

[0009]

The receiving bearing 8 is provided on the input portion 6 of the governor lever 4.
And the governor pin 3 is attached to the outer race 30 of the bearing 8.
The outer race 30 of the bearing 8 is rotated by receiving friction due to the governor pin 3 which rotates together with the governor shaft 1 because the pressing plane 7 of the bearing eccentrically hits the inner race 31 of the bearing 8. 32 does not rotate. That is, the frictional energy of the transmission portion of the governor force GF from the governor pin 3 to the governor lever 4 is absorbed inside the receiving bearing 8, and the wear of the transmission portion is suppressed.

[0010]

According to the present invention, the rotation energy of the governor pin is absorbed by the action of the receiving bearing provided at the input portion of the governor lever, and the frictional force generated by the rotation of the governor pin does not reach the governor lever side. Wear of the force transmission portion can be suppressed. For this reason, since the point of action of the output part on the governor pin side with respect to the input part of the governor lever is fixed, governor accuracy can be improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a longitudinal left side view of a governor force transmission device of a centrifugal governor of a diesel engine, FIG. 2 is a front view of the governor lever of the embodiment, FIG. 3 is an enlarged explanatory view of a main part of an input part of the governor lever, and FIG. FIG. 5 is a front view of a governor pin of the governor force transmission device.

As shown in FIG. 1, a diesel engine E
A gear chamber 14 and a pump chamber 13 are provided adjacent to the front and rear, and a fuel injection pump 12 is housed in the pump chamber 13. The governor shaft 1 is supported in the lower part of the pump chamber 13 in the front-rear direction. The injection pump 12 is configured to be capable of driving fuel injection.

As shown in FIG. 1, a governor gear 15 is fixed to the front end of the governor shaft 1 so as not to rotate relatively, and the governor weight 2 of a centrifugal governor is swingable on the governor gear 15 via a pivot shaft 16. The governor shaft 1 is supported and a shaft hole 17 is drilled rearward from the front end edge of the governor shaft 1.
Is fitted inside the axis A so as to be movable back and forth. The flange portion 11 of the governor pin 3 is configured to be able to be pressed by the output portion 2 a of the governor weight 2, and the governor force GF generated by the swing of the governor weight 2 can be transmitted to the governor lever 4 via the governor pin 3.

As shown in FIG. 5, a notch 23 having a partially circular arc is provided in the flange 11 of the governor pin 3, and the notch 23 is engaged with the accompanying rotation bolt 24 fixed to the governor gear 15. Thus, the governor pin 3 is configured to surely rotate together with the governor shaft 1 (see the phantom line in FIG. 1).

As shown in FIG. 1, the governor lever 4 is supported by the gear chamber 14 via a left-right pivot shaft 18, and the output rod 5 on the front side of the governor pin 3 can be brought into contact with the input portion 6 of the governor lever 4. And the output part 1 of the governor lever 4
9 is connected to a metering rack pin 21 of the fuel injection pump 12 by a connecting member 20, and the governor lever 4 is connected to the governor spring.
The governor lever 4 is connected to a governing lever via an unillustrated (not shown) so that the governor lever 4 can swing back and forth with an unbalanced force between the governor force GF of the governor weight 2 and the spring force of the governor spring.

As shown in FIGS. 1 to 4, a pressing plane 7 orthogonal to the axis A is formed on the front end of the output rod 5 of the governor pin 3, and the pivot shaft 18 is provided on the input portion 6 of the governor lever 4. The support bearing 8 is provided via a pivot shaft 10 in parallel with, that is, in the left-right direction, and the flat surface 7 against which the governor pin 3 is pressed faces the outer race 12 of the support bearing 8 so as to be able to come into contact therewith.

That is, as shown in FIGS. 3 and 4, a substantially dumbbell-shaped cutout groove 25 in which three round holes 22 are continuous is formed in the input portion 6 of the governor lever 4 (see a virtual portion P in FIG. 3). A steel ball 26 is fitted inside the inner race 31 of the receiving bearing 8, and the bearing 8 is inserted into the cutout groove 25 while engaging the steel ball 26 with the middle round hole 22. For example, the steel ball 26 is caulked by stamping the four sides 27 of 22 with a punch, and the bearing 8 is attached to the governor lever 4 by the steel shaft 26.
The position is fixed at 0. In this case, since the pivot shaft 10 is set parallel to the pivot shaft 18 of the governor lever 4, the outer race 30 and the inner race 31 of the receiving bearing 8 are arranged in the front-rear direction same as the direction of the axis A of the governor shaft 1.

The central round hole 22 may have an inner surface formed as a partial spherical surface having the same curvature as the spherical surface of the steel ball 26. Further, the bearing 8 is not limited to a ball bearing, and other types of bearings such as a needle bearing can be used.

As shown in FIGS. 2 and 4, the pressing plane 7 of the governor pin 3 is eccentric by a distance B from the axis of the governor pin 3, that is, the axis A of the governor shaft 1, and is used for the receiving. It comes into contact with the outer race 30 of the bearing 8. However, the receiving bearing 8 may have a support pin fixed in the left-right direction of the governor lever 4 as the pivot shaft 10. However, if the engagement method using the steel ball 26 of the present embodiment is adopted, the structure is simple and lightweight. Can be configured.

Therefore, the function of the governor force transmission device of this embodiment will be described. A receiving bearing 8 is provided on the input portion 6 of the governor lever 4, and the pressing plane 7 of the governor pin 3 is eccentrically applied to the outer race 30 of the bearing 8 at a distance B, as shown in FIGS. 2 and 4. The outer race 30 of the bearing 8 receives the frictional force and rotates in the direction of arrow S by the governor pin 3 which rotates together with the governor shaft 1 in the direction of arrow R. On the other hand, the inner race 31 of the receiving bearing 8 does not rotate due to the action of the ball 32 of the bearing 8, and the rotational energy of the governor pin 3 does not reach the governor lever 4.

That is, the frictional energy of the transmission portion of the governor force GF from the governor pin 3 to the governor lever 4 is absorbed inside the receiving bearing 8 and the wear of the transmission portion is suppressed, so that the input portion of the governor lever 4 is suppressed. Since the point of action of the output section 5 on the governor pin 3 side with respect to 6 is fixed, governor accuracy can be improved.

In this embodiment, since the pivot 10 of the receiving bearing 8 is supported in the left-right direction, the governor lever 4 is supported.
The outer race 30 of the receiving bearing 8 is always in point contact with the pressing plane 7 of the governor pin 3 even if the front and rear swings back and forth, so that the governor force GF can be smoothly transmitted to the governor lever 4.

Further, since the governor pin 3 is reliably rotated together with the governor shaft 1 by the accompanying rotation bolt 24, the wear of the governor force GF transmitting portion from the output portion 2a of the governor weight 2 to the governor pin 3 can be further reduced.

In the above embodiment, the axis of the governor shaft is arranged in the front-rear direction. However, the present invention can be applied to a case where the axis is arranged in another direction such as the vertical direction. Needless to say.

[Brief description of the drawings]

FIG. 1 is a vertical left side view of a governor force transmission device of a centrifugal governor of a diesel engine.

FIG. 2 is a front view of the governor lever of the embodiment.

FIG. 3 is an enlarged explanatory view of a main part of an input unit of the governor lever.

FIG. 4 is a perspective view of a main part of the governor force transmission device.

FIG. 5 is a front view of the governor pin.

FIG. 6 is an equivalent view of FIG.

FIG. 7 is a schematic explanatory view of a governor force transmission device for a centrifugal governor of an engine, showing prior art 2.

[Explanation of symbols]

1: governor shaft, 2: governor weight, 3: governor pin,
4 ... governor lever, 5 ... governor pin output, 6 ... governor lever input, 7 ... governor pin pressing plane, 8
... bearing bearings for governor levers, 10 ... pivot shafts for receiving bearings, 30 ... outer races for bearings, 31 ... inner races for bearings, A ... shaft center of governor shafts, GF ... governor forces, E ... engines.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sada Tsuji 64 Ishizukita-machi, Sakai City, Osaka Prefecture, Kubota Sakai Factory (72) Inventor Nobuhiro Yamamoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture 64 Kubota Sakai Factory, Inc. (72 ) Inventor Akira Hayaya 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-4-33471 (JP, A) JP-A-5-321698 (JP, A) -128246 (JP, U) Fully open sho 64-47949 (JP, U) Fully open sho 63-128246 (JP, U) Fully open hira 4-103244 (JP, U) (58) Field surveyed (Int.Cl) . ⁶ , DB name) F02D 1/04 F02D 31/00 301

Claims (1)

(57) [Claims] A governor weight (2) and a governor pin (3) are provided on a governor shaft (1) of an engine (E) to control the governor weight.
The swing of (2) moves the governor pin (3) to the axis (A) of the governor shaft (1).
The governor lever (4) is pivotably supported by the engine (E) so as to swing, and the output portion (5) of the governor pin (3) is connected to the input portion (6) of the governor lever (4). Governor force (G) generated by swinging governor weight (2)
F) to the governor lever (4) through the governor pin (3).
In the governor force transmission device for a centrifugal governor of an engine configured to be able to transmit to the front end of the output portion (5) of the governor pin (3), the flat surface (7) is perpendicular to the axis (A). A receiving bearing (8) is provided on the input portion (6) of the governor lever (4) via a pivot shaft (10). ), The outer race (30), the axis of the governor shaft (1)
A governor force transmission device for a centrifugal governor of an engine, wherein the governor force transmission device is eccentric from (A) so as to be able to contact.