JPH05222960A - Speed control device of engine - Google Patents

Abstract

PURPOSE:To make compact a speed control apparatus by constituting it such that a peripheral part positioned at the side of a governor lever of a governor spring is entered into a recessed space of a speed control lever at the time of low-speed setting where an oscillating end of the speed control lever closes to an end positioned at the side of the speed control lever. CONSTITUTION:An oscillation flat surface of a speed control lever 3 is almost conformed with an oscillation flat surface of a governor lever 4, a coil-shaped governor spring 6 is provided between an oscillation end 5 of the speed control lever 3 and the governor lever 4, and a periphery part 7 positioned at the side of a governor lever 4 is faced with an edge 8 positioned at the speed control lever side. The speed control lever side edge 8 is formed into a recessed shape, a recessed space 9 is provided in the edge 8 positioned at the speed control lever side, and the peripheral part 7 positioned at a governor side of the governor spring 6 is entered into the recessed space 9 at the time low speed setting where the oscillation end 5 of the speed control lever 3 closes to the edge 8 of the speed control lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine speed governor.

[0002]

2. Description of the Related Art As a conventional engine speed control device, there is one shown in FIG. This arranges the speed governing lever shaft 101 and the governor lever shaft 102 in parallel, pivotally supports the speed governing lever 103 via the speed governing lever shaft 101, and supports the governor lever 104 via the governor lever shaft 102. It is swingably pivotally supported, and the swing plane of the speed control lever 103 and the swing plane of the governor lever 104 are substantially aligned with each other, and a coil is provided between the swing end 105 of the speed control lever 103 and the governor lever 104. Shaped governor spring 1
No. 06 is interposed, and the governor lever side peripheral side portion 107 of the governor spring 106 faces the speed control lever side edge portion 108 of the governor lever 104.

By the way, in this prior art, when the swinging end 105 of the speed governing lever 103 approaches the speed controlling lever side end 108 of the governor lever 104 at a low speed setting, the governor lever side peripheral side part 107 of the governor spring 106 is moved to the governor lever. In order to avoid buffering with the speed control lever side edge portion 104 of the speed control lever 104, the speed control lever shaft 101 and the governor lever shaft 102
The axial distance 109 between and was set to be long.

[0004]

In the above-mentioned prior art, in order to prevent the governor lever side peripheral side portion 107 of the governor spring 106 from interfering with the governor lever side edge portion 108 of the governor lever 104 at the time of low speed setting, the governor lever is avoided. Axis 101
Therefore, the axial distance 109 between the governor lever shaft 102 and the governor lever shaft 102 must be increased. Therefore, this conventional technique has a problem in that the speed governor becomes large.

According to the present invention, the axial distance between the governor lever shaft and the governor lever shaft is reduced while avoiding that the governor lever side peripheral side portion of the governor spring buffers the governor lever side edge portion at the time of low speed setting. The task is to be able to shorten it.

[0006]

According to the present invention, as shown in FIG. 1, a speed governing lever shaft 1 and a governor lever shaft 2 are arranged in parallel with each other, and a speed controlling lever 3 is connected via the speed controlling lever shaft 1. The governor lever 4 is swingably supported, and the governor lever 4 is swingably supported via the governor lever shaft 2.
The swing plane of the governor lever 4 and the swing plane of the governor lever 4 are substantially aligned with each other, and a coil-shaped governor spring 6 is interposed between the swing end portion 5 of the speed control lever 3 and the governor lever 4. The governor lever side peripheral portion 7 of 6 is arranged to face the governor lever side edge portion 8 of the governor lever 4, and the engine governor device is characterized in that it is constituted as follows.

The governor lever 4 has a speed control lever side edge portion 8
Is formed in a concave shape, and a concave space 9 is provided in the speed control lever side edge portion 8 so that the swing end 5 of the speed control lever 3 approaches the speed control lever side edge 8 of the governor lever 4. At the time of setting, the governor lever side peripheral side portion 7 of the governor spring 6 is set.
Is configured to enter the concave space 9.

[0008]

Operation: Even if the axial distance 10 between the speed governing lever shaft 1 and the governor lever shaft 2 is set to be short, the swinging end 5 of the speed controlling lever 3 approaches the speed controlling lever side edge 8 of the governor lever 4. At a low speed setting, the governor lever side peripheral side portion 7 of the governor spring 6 enters the concave space 9 formed in the speed control lever side edge portion 8 of the governor lever 4, so that the governor lever side peripheral side portion 7 of the governor spring 6 is It is possible to avoid buffering at the speed control lever side edge portion 8 of the governor lever 4.

When the swing end portion 5 of the speed governing lever 3 is separated from the speed control lever side edge portion 8 of the governor lever 4, the governor spring 6 is attached to the swing end portion 5 of the speed controlling lever 3 at a medium speed / high speed setting. It functions when pulled out of the concave space 9.

[0010]

According to the present invention, at the time of low speed setting, the governor lever side circumferential side portion of the governor spring avoids buffering the governor lever side edge portion of the governor lever, while avoiding the interference between the governor lever shaft and the governor lever shaft. The shaft distance can be set short and the speed governor can be made compact.

[0011]

Embodiments of the present invention will be described with reference to the drawings.
1 is a partially cutaway side view of a main part of a speed governor according to an embodiment of the present invention, and FIG. 2 is a partially cutaway side view of a speed governor according to an embodiment of the present invention.

In FIG. 2, reference numeral 11 is a pump chamber in which a fuel injection pump 12 is housed. The fuel injection pump 12 is of a Bosch type, and a metering rack 14 is slidably attached to the side of the pump body 13 and a metering rack pin 15 is fixed to the side of the metering rack 14. .. An injection cam shaft 16 is installed below the fuel injection pump 12, a tappet 18 of the fuel injection pump 12 is placed on the injection cam 17 of the injection cam shaft 16, and a cam is provided at the end of the injection cam shaft 16. The shaft input gear 19 is externally fitted and fixed. The camshaft input gear 19 is interlocked with a crank gear (not shown) via an idle gear (not shown).

According to this structure, the rotation of the crankshaft is controlled by the crank gear, the idle gear, and the camshaft input gear 19.
Are sequentially transmitted to the injection cam shaft 16 and the injection cam 17
As a result, the tappet 18 is pushed up at a predetermined timing, and fuel is injected by operating the pump. The fuel injection amount of the fuel injection pump 12 is adjusted by the sliding movement of the adjustment rack 14.

The sliding movement of the metering rack 14 is performed by a speed control device. The structure of the speed governor is as follows. A governor chamber 20 is formed on the front side of the pump chamber 11, and the speed governing lever shaft 1 and the governor lever shaft 2 are arranged side by side in the governor chamber 20 and are laid in parallel. A speed control lever 3 is pivotally supported via a speed control lever shaft 1, and a spring lever 21 and an interlocking lever 22 are pivotally supported via a governor lever shaft 2. The governor lever 4 is formed by the spring lever 21 and the interlocking lever 22. The swing plane of the speed control lever 3 and the swing plane of the spring lever 21 are substantially aligned with each other. A coil-shaped governor spring 6 is interposed between the swinging end 5 of the speed control lever 3 and the swinging end 23 of the spring lever 21, and the governor lever side peripheral side portion 7 of the governor spring 6 is connected to the spring lever. It is made to face the speed control lever side edge portion 21 of 21.

A plurality of governor weights 24 are swingably supported on the camshaft input gear 19. A slide guide hole 25 is formed in the injection cam shaft 16 along its axis, and a slide rod 26 is slidably inserted therein. An engaging portion 27 recessed in the governor weight 24 is engaged with a flange 28 fixed to the sliding rod 26, and the tip end of the sliding rod 26 is brought into contact with the interlocking lever 22 from the rear side. Also, as shown in FIG. 1, attach the spring lever 21 to the contact bolt 2
9 and the torque spring 30 to contact the interlocking lever 22 from its front side. Further, as shown in FIG. 2, a metering rack pin 15 is interlockingly connected to the interlocking lever 22 via an interlocking rod 31.

According to this structure, as shown in FIG. 2, when the speed control lever 3 is swung to a predetermined speed control position,
The governor spring 6 is pulled, and its tension is applied to the governor lever 4 as the spring force 32. Further, since the governor weight 24 rotates together with the cam shaft input gear 19, the centrifugal force thereof is applied to the governor lever 4 as the governor force 33 via the engaging portion 27, the flange 28, and the sliding rod 26 in this order. Then, the spring force 32 and the governor force 33
The governor lever 4 oscillates so as to balance with each other, the movement is transmitted to the metering rack pin 15 via the interlocking rod 31, the metering rack 14 slides, and the fuel injection amount of the fuel injection pump 12 is adjusted. Done. Incidentally, reference numeral 3 in FIG.
4 is a start spring, 35 is a fuel limit bolt, 36
Is an engine stop solenoid.

In this speed governing device, as shown in FIG. 1, in order to shorten the axial distance 10 between the speed governing lever shaft 1 and the governor lever shaft 2, the speed controlling lever side edge portion 8 of the spring lever 21 is shortened. Is formed in a concave shape, and a concave space 9 is provided in the speed control lever side edge portion 8, and the swing end portion 5 of the speed control lever 3 is formed.
When the vehicle speed is set to approach the speed control lever side edge portion 8 of the spring lever 21, the governor lever side peripheral side portion 7 of the governor spring 6 enters the recessed space 9.

According to this structure, the speed control lever shaft 1
Even when the axial distance 10 between the governor lever shaft 2 and the governor lever shaft 2 is set to be short, when the rocking end portion 5 of the speed governing lever 1 approaches the speed controlling lever side edge portion 8 of the spring lever 21, a low speed setting is performed.
Since the governor lever side peripheral side portion 7 of the governor spring 6 enters the recessed space 9 provided in the governor lever 4 edge 8 of the governor lever 4, the governor lever side peripheral side portion 7 of the governor spring 6 controls the speed of the spring lever 21. Buffering on the lever side edge 8 can be avoided. Further, when the swing end 5 of the speed control lever 3 is separated from the speed control lever side edge 8 of the spring lever 21, the governor spring 6 is pulled by the swing end 5 of the speed control lever 3 at a medium speed / high speed setting. , Functioning in a state of leaving the concave space 9.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a main part of a speed governing device for an engine according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of an engine speed governor according to an embodiment of the present invention.

FIG. 3 is a side view of a main part of an engine speed governing device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Governor lever shaft, 2 ... Governor lever shaft, 3 ... Governor lever, 4 ... Governor lever, 5 ... 3 rocking end part, 6 ... Governor spring, 7 ... 6 governor lever side peripheral side part, 8 ... 4 Edge of the speed control lever, 9 ... Recessed space.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Yamamoto 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Shoichi Yamamoto 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Akira Hayaya 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. (72) Inventor Yutaka Watanabe 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd.

Claims (1)

[Claims] 1. A governor lever shaft (1) and a governor lever shaft (2)
Are arranged in parallel with each other, and the speed governing lever (3) is pivotally supported by the speed governing lever shaft (1), and the governor lever (4) is freely swung by the governor lever shaft (2). Pivotal,
The rocking plane of the speed governing lever (3) and the rocking plane of the governor lever (4) are substantially aligned with each other, and the rocking end (5) of the speed governing lever (3) and the governor lever (4) are aligned with each other. The coil-shaped governor spring (6) is installed in the
The governor lever peripheral edge (7) is opposed to the governor lever side edge (8) of the governor lever (4), and the governor lever (4) is provided with a governor lever side edge (8). The portion (8) is formed in a concave shape, and the concave space (9) is formed in the speed control lever side edge portion (8).
Is provided, and when the rocking end (5) of the speed governing lever (3) approaches the speed controlling lever side edge (8) of the governor lever (4) at a low speed setting, the governor spring (6) has a governor lever side (6). An engine speed governor characterized in that the peripheral side portion (7) is configured to enter the concave space (9).