JPH025886B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a decompression device mainly used for an engine working equipment set in which an engine and a generator, or an engine and a pump or compressor, etc. are mounted as a set on one support base, and in particular, This is related to its operating structure.

Compression ignition engines, or diesel engines, have a high compression ratio, which makes it difficult to overcome the compression state and turn the crankshaft when starting. It is well known that a decompression device is provided for this purpose. In such a decompression device, a decompression lever is pivotally attached to a head cover that is attached to the upper surface of the cylinder head and covers the valve arm, and the decompression lever is rotated to obtain the above-mentioned non-compression state. On the other hand, in an engine working machine set or the like in which the engine is attached to a support stand or the like via a vibration isolating material, there is a problem in that large vibrations are generated immediately before the engine is stopped. This is because the rotational force of the engine is weak, so the piston cannot reciprocate past the top dead center, that is, the compression point, and returns to its original position just before that point. Therefore, in this case, such inconvenience can be solved by putting the engine into a non-compressing state by operating the decompression lever immediately before stopping the engine.

However, in the past, in order to obtain such a non-compression state, when the engine is stopped,
In addition to operating the regulator handle, the decompression operating lever must also be operated, which is disadvantageous in that the operation is complicated. This invention is
This was done with the aim of eliminating such inconveniences.

In order to achieve the above object, in this invention, an engine is mounted and supported on a support base via a vibration isolating material, an operating lever is attached to the side of the engine, and this operating lever and an engine decompression lever are interlocked and connected. In this case, even if the operating lever is operated between the low speed position and the high speed position, the operating lever does not move in the decompression direction, but when the regulator handle is operated from the low speed position to the stop position, the operating lever does not move in the decompression direction. , via an interlocking mechanism that also moves the operating lever in the decompression direction.
It is characterized in that it is interlocked and connected to the regulator handle.

Hereinafter, the structure of the present invention will be explained based on illustrated embodiments, but before that, the structure of a general engine working machine set that does not have the above-mentioned interlocking mechanism will be explained based on FIGS. 1 to 4. Thereafter, the above-mentioned interlocking mechanism will be explained based on FIG. 5 and subsequent figures. In the figure, 1 indicates a support frame 2 and this support frame 2.
An engine support stand consisting of a support plate 4 and a horizontal frame 3 attached to the lower end of the engine, and on the support plate 4,
An engine main body 6 and a generator 11 are installed with vibration-proof rubbers 5, 5 interposed therebetween. This engine body 6
A head cover 8 that covers a valve arm (not shown) is attached to the upper surface of the cylinder head 7 located above the cylinder head. Reference numeral 9 denotes a fuel tank attached to the support frame 2 at its flange portion 10, and this fuel tank 10 is attached to the generator 11.
The lower half member 12 of the engine 6 portion is recessed upward in the shape of a pyramid to cover the head cover 8 and the decompression lever 13 attached to the head cover 8. is covered. That is, this fuel tank 9 also serves as a soundproof cover that covers the engine 6 in the upper part thereof.

On the side wall surface of the cylinder head 7 that is not covered by the fuel tank 9 which also serves as the soundproof cover, a lever stand 14 is attached by bolts 15, 15, and one end of this lever stand 14 is attached. An L-shaped operating lever 16 is pivotally mounted, and the other end of the operating lever 16 projects slightly horizontally to the same side as the regulator handle 31 and rotates downward by pushing the other end 17. When this is done, the decompression lever 13 is pulled and rotated via the link 18, thereby reducing the pressure at the time of starting, that is, performing a decompression operation.

FIG. 3 shows the mounting structure of the operating lever 16, in which the central portion of the operating lever 16 is pivotally attached to the bent protruding piece 19 of the lever base 14 via, for example, a stepped bolt 20. .

Reference numeral 21 denotes a connector consisting of a circular head 22 and an insertion part 23, and made of rubber or other elastic material, and a circumferential groove 24 provided between the insertion part 23 and the head 22, As shown in Figure 4,
It is loosely inserted into the mounting hole 25 at one end of the operating lever 16. Further, the head 22 has a diametrical groove 26 on its end surface, and an insertion hole 27 is formed in the center direction from the center of the groove 26, and one end of the insertion hole 27 is connected to the decompression lever 13 by a link 18. An insertion portion 2 whose other end is fitted into the groove 26 and whose tip is bent at a right angle.
8 is inserted into the hole 27 and connected. This coupling tool 21 is also used for coupling with the decompression lever 13. 29 is an arc-shaped guide hole formed in the operating lever 16, and 30 is a protruding piece provided at the tip of the lever base 14;
is inserted into the guide hole 29 to restrict the rotation range of the operating lever 16.

5 to 7 show other embodiments of the invention. In this embodiment, the regulator handle 31 is configured such that the rotating surface of the handle 31 is the same as or parallel to the rotating surface of the operating lever 16 to support the pivoting of the operating lever 16. It is supported by a support shaft 32 in the same direction as the bolt 20. This regulator handle 31 has a connecting piece 34 that rotates together with the handle 31.
is provided protrudingly, and this connecting piece 34 has an arc-shaped elongated hole 35 formed therein. On the other hand, correspondingly, an arc-shaped elongated hole 36 is also formed in the operating lever 16, and another link 37 is formed between the operating lever 16 and the elongated holes 35, 36 of the regulator handle 31. is attached movably within the range of both elongated holes 35 and 36. Now, in this FIG. 5, the operating lever 16 is in a normal state without pressure reduction, while the regulator handle 31 is in a low speed (idling) position.
In this state, the link 37 is connected to the operating lever 1.
Regulator handle 31 in elongated hole 36 at 6
On the other hand, on the regulator handle 31 side, it is located at the end of the elongated hole 35 on the operation lever 16 side. From this state, as shown in Figure 6,
Even if the decompression lever 16 is rotated downward, that is, toward the regulator handle 31, the operation lever 16
Due to the action of the elongated hole 36, the regulator handle 31 can perform a decompression operation without being affected in any way. On the other hand, as shown in FIG. 7, when the regulator handle 31 is rotated from the low speed position to the stop position, the operating lever 16 is pulled through the link 37. rotates, and the other link 1
8, the decompression lever 13 is rotated to bring it into a non-compression state.

FIG. 8 shows another structure for preventing vibrations when the engine is stopped as described above. In this embodiment, a stopper 40 has one end fixed to the upper surface of the engine body, that is, the cylinder head 7.
is extended to the lower surface of the horizontal frame 3 with an inverted L-shaped cross section that is passed to the support frame 2, and another L-shaped regulating plate 41 is fixed to the horizontal frame 3, thereby separating the horizontal frame 3 and the regulating plate 4.
A contact piece 42, which is formed by bending the outer end of the stopper 40 upward at a right angle, is positioned between the horizontal frame 3 and the horizontal frame 3.
and the regulating plate 41 to prevent large vibrations of the engine 6.

In this embodiment, the fuel tank 9 is also used as a soundproof cover for the engine 6, but it is also possible to cover only the engine 6 with a dedicated cover instead of using such a dual-use structure. Of course.

As described above, according to the present invention, when the engine decompression lever and the regulator handle are operated from the low speed position to the stop position, the operating lever is moved in the decompression direction by the regulator handle. This has the effect that there is no need to operate a special decompression lever in order to prevent vibrations when the engine is stopped.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an engine generator set showing an embodiment of the present invention, Fig. 2 is a cross-sectional front view thereof, Fig. 3 is an exploded perspective view showing the mounting structure of the operating lever, and Fig. 4 5 is a longitudinal sectional view showing the structure of the attachment part of the link, FIG. 5 is a front view of the main part showing another embodiment of the present invention, and FIGS. 6 and 7 are respectively the embodiment shown in FIG. FIG. 8 is a front view showing the operating state of the engine, and FIG. 8 is a side view showing the steady rest structure provided with a stopper when the engine is stopped. DESCRIPTION OF SYMBOLS 1... Support stand, 6... Engine, 7... Generator, 8... Anti-vibration rubber, 9... Fuel tank (cover), 13... Decompression lever, 16... Operation lever, 31... Regulus Rator handle, 35,3
6... Long hole, 37... Link.

Claims (1)

[Claims] 1. An engine is mounted and supported on a support base via a vibration isolating material, and an operating lever is attached to the side of the engine, and this operating lever and an engine decompression lever are interlocked and connected, and further:
Even when the regulator handle is operated between the low speed position and the high speed position, the operation lever does not move in the decompression direction, but when the regulator handle is operated from the low speed position to the stop position, the operation lever does not move in the same direction. 1. A decompression device for an engine working machine set, characterized in that a lever is interlocked and connected to the regulator handle via an interlocking mechanism that operates in a decompression direction.