JPH036829Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention consists of an internal combustion engine mounted on an aircraft as a power source, a carburetor that supplies a mixture to the internal combustion engine, and a carburetor that supplies clean air to the carburetor. A portable power working machine such as a chainsaw has an air cleaner to supply the air, and a throttle rod and a choke rod connected to the carburetor.

Conventional Technology In conventional chainsaws, etc., when connecting a throttle rod and a choke rod to a carburetor, the throttle rod and the choke rod are first inserted into a hole in the side wall of the storage chamber of the carburetor, and then connected to the carburetor. It was fixed inside the storage room. In this way, the throttle rod and choke rod are connected to the carburetor through the wall hole in the carburetor storage chamber, and then the carburetor is fixed in the storage chamber, which makes assembly difficult and requires maintenance. However, there were problems.

Problems to be Solved by the Invention Therefore, the present invention eliminates the drawbacks related to the ease of assembly with the throttle rod and choke rod of the conventional portable power working machine, and also has a simple structure and easy manufacture. The purpose of the present invention is to provide a portable power working machine.

Means for Solving the Problems The portable power working machine according to the present invention has a carburetor storage chamber for storing a carburetor defined by vertically stacking a cylinder cover and a carburetor case, and a cylinder cover and a carburetor case. A U-shaped notch is formed between the cylinder cover and the carburetor case, and the bearings of the throttle rod and the choke rod are inserted into the notch and held between the cylinder cover and the carburetor case.

Effect: Therefore, with the above structure of the present invention, the throttle rod and the choke rod are inserted into the bearing member and sandwiched between the cylinder cover and the carburetor case through the U-shaped notch. .

Embodiment The configuration of the present invention will be explained based on an embodiment of a chainsaw shown in the drawings.

In this embodiment, an internal combustion engine 2 as a power source is installed inside a body 1 of a chainsaw, and a piston 4 reciprocates in a cylinder 3 in the vertical direction.

The carburetor case 5 is adjacent to the rear side of the cylinder 3.
is provided inside the fuselage 1. The vaporizer case 5
is fitted with one end 8 of a rubber suction pipe 7 at its upright front wall portion 6, and is clamped and connected to a carburetor 9 housed within the carburetor case 5.
The other end 10 of the suction pipe 7 is connected to the cylinder 3, and the air-fuel mixture from the carburetor 9 is supplied into the internal combustion engine 2. The carburetor 9 has two parts on both sides on the cylinder 3 side.
It is fixed to the carburetor case 5 by a bolt (not shown) that passes through and screws into the front wall portion 6 of the carburetor case 5.

The upper portions of the cylinder 3 and the carburetor 9 are covered by a cylinder cover 11 attached to the body 1. The cylinder cover 11 is made of a synthetic resin material, and integrally forms double wall portions 12 and 13 extending downward between the cylinder 3 and the carburetor 9. The lower end of the cylinder 3 engages with the front wall portion 6 of the carburetor case 5 to adiabatically partition the space between the cylinder 3 and the carburetor 9. Further, the carburetor case 5 has two U-shaped notches N in the rear wall portion 14 that abuts the cylinder cover 11 in its rear portion, and extends downward on both sides thereof to form a carburetor storage chamber 17. Constituting side wall portions 15 and 16
(See Fig. 2) are integrally formed. In this way, the carburetor case 5 and the cylinder cover 11
are stacked on top of each other to define a chamber 17 that accommodates the vaporizer 9.

A box-shaped air cleaner 18 having filter media 24 and 27 is disposed on the upper surface of the cylinder cover 11 corresponding to the upper part of the carburetor storage chamber 17, and the air cleaner 18 includes the cylinder cover 11 and a removable synthetic resin cleaner. It is held between the covers 19 and fixed by screws 19A that pass through the cleaner cover 19 and the air cleaner 18 and are screwed into the upper surface of the cylinder cover 11. The cleaner cover 19 is integrally formed with double wall portions 20 and 21 that extend downward in a portion close to the cylinder 3 and separably engage with the cylinder cover 11. It is insulated. Cylinder cover 1
1 double wall parts 12, 13 and cylinder cover 1
The double-walled portions 20, 21 of 1 isolate the carburetor 9 and the air cleaner 18 from the cylinder 3 of the internal combustion engine 2, blocking the transfer of heat from the cylinder 3 and protecting the carburetor 9 and the air cleaner 18.

The cleaner storage chamber 22 in the cleaner cover 19 is connected to the carburetor case 5 and the cylinder cover 1 through an opening formed at the rear of the upper surface of the cylinder cover 11.
It communicates with a vaporizer storage chamber 17 composed of 1. Further, the cleaner storage chamber 22 in the cleaner cover 19 communicates with the internal space 25 of the air cleaner 18 via the filter medium 24 on the upper surface of the air cleaner 18, and the carburetor storage chamber 17 is located in front of the upper surface of the cylinder cover 11. It communicates with the internal space 25 of the air cleaner 18 through an opening 26 formed in the air cleaner 18 and a filter medium 27 on the lower surface of the air cleaner 18 . A purified air outlet 28 provided on the lower surface of the air cleaner 18 is arranged in alignment with an elbow insertion port 29 formed on the upper surface of the cylinder cover 11.
An annular seat 30 recessed around the upper surface of the insertion port 29
is integrally formed with the cylinder cover 11.
In addition, the elbow 31 made of an elastic material such as rubber,
The flange portion 32 at the upper end of the elbow 31 is inserted into the elbow insertion hole 29 of the cylinder cover 11 from below.
is seated on the annular seat portion 30 of the cylinder cover 11. The flange portion 32 is the air cleaner 18
An annular lip portion (not shown) projecting upward is integrally formed on the upper surface that engages with the peripheral portion of the purified air outlet 28 of the air cleaner 18, and this annular lip portion is crimped onto the purified air outlet 28 of the air cleaner 18. to seal the connection between the air cleaner 18 and the elbow 31. A flange portion 33 at the lower end of the elbow 31 is fixed to the air inlet of the carburetor 9. The elbow 31 has a smoothly curved middle portion.

The cylinder cover 11 further has openings 34 and 35 formed on both sides of the top surface, respectively. The cleaner storage chamber 22 in the cleaner cover 19 communicates with a side space 38 in the body 1 through one opening 34 and with another side space 39 through the other opening 35. The side spaces 38 and 39 are
At their lower ends, they open to the side and lower side of the carburetor case 5 and communicate with the outside of the fuselage 1 .

With such a configuration, external air flows upward from below the fuselage 1 and is introduced into the side spaces 38 and 39 while dropping and removing relatively heavy dust, and then is introduced into the side spaces 38 and 39 through the openings 34 and 35, respectively. It flows into the cleaner storage chamber 22 inside the cleaner cover 19. A part of the air that has flowed into the cleaner storage chamber 22 is transferred to the filter medium 24 on the upper surface of the air cleaner 18.
The remaining air flows into the internal space 25 from the carburetor storage chamber 17 surrounding the carburetor 9 through an opening formed at the rear of the upper surface of the cylinder cover 11.
From there, it flows through the front opening 26 of the cylinder cover 11 and from the filter medium 27 on the lower surface of the air cleaner 18 into the internal space 25 of the air cleaner 18 . This air flow maintains the temperature of the vaporizer 9 and its surroundings at an appropriate temperature. The air finally purified by the air cleaner 18 is passed from the internal space 25 through the purified air outlet 28 to the elbow 3.
1 and further passes through the elbow 31 to the carburetor 9.
flow inward.

In the U-shaped notches N, N formed in the rear wall portion 14, a throttle rod S is connected at one end to the carburetor 9 and the other end is operatively connected to the throttle trigger 40, and a throttle rod S is connected at one end to the carburetor. A chiyoke rod C that is connected and has an operation knob (not shown) attached to the other end.
The bearings (grommets) R and L are inserted from above, and the bearing holding rib T of the cleaner cover 19 presses and fixes the bearings R and L. Therefore, the throttle rod S and the choke rod C can be connected to the carburetor 9 after the carburetor 9 is screwed and fixed to the front wall 6 of the carburetor case 5, and the bearings R and L can be connected to the cylinder cover 11. It can be fixed by simply holding it in place, eliminating the difficulty of assembly as in the past. Furthermore, the work becomes easier when disassembling and assembling for maintenance and inspection.

Effects of the invention With the configuration of the invention explained above, the invention enables the throttle rod and the choke rod to be connected via a bearing member inserted into a U-shaped notch formed between the abutment between the carburetor case and the cylinder cover. Because it is attached,
Even after the carburetor is fixed to the main body, the throttle rod and the choke rod can be easily and securely connected to the carburetor, and assembly, maintenance, inspection, etc. can be performed quickly, reliably, and easily.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of a chainsaw showing one embodiment of the present invention, and FIG. 2 is a -
FIG. 1... Aircraft, 2... Internal combustion engine, 5... Carburetor case, 9... Carburetor, 11... Cylinder cover,
17... Carburetor storage room, 18... Air cleaner,
C...Chiyoke rod, S...Throttle rod, R, L
……bearing.

Claims (1)

[Scope of utility model registration request] Internal combustion engine 2 mounted on the aircraft body 1 as a power source
and a carburetor 9 that supplies the air-fuel mixture to the internal combustion engine.
Air cleaner 1 that supplies clean air to the vaporizer
8, and a throttle rod S and a choke rod C connected to the carburetor, the carburetor storage chamber 17 that stores the carburetor is placed between the cylinder cover 11 and the carburetor case 5 above and below. U-shaped notches N, N are formed between the cylinder cover 11 and the carburetor case 5 in contact with each other, and bearings R, L of the throttle rod and the choke rod are formed. A portable power working machine characterized in that it is inserted into the notches N and N and held between the cylinder cover 11 and the carburetor case 5.