JPH0743219U - Choke structure of engine for backpack work machine - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the engine start operation by the auto starter, ensure the engine start, and also enable the engine start operation manually (recoil starter). A rotary shaft 11 and a second end 6 of a rotary solenoid 7 which is controlled and rotated by an auto starter switch 16 via a timer relay 8 at one end 5 of a choke rotation shaft.
The engaging shaft portion 13 of the manual choke lever 10 is engaged with, and the rotating operation of the manual choke lever 10 or the rotating shaft 11 of the rotary solenoid 7 does not affect the other rotating operation. To the engaging portion 11,
12, 13, 14, and S are configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a choke structure for an engine for a backpack work machine, which simplifies the starting operation of an engine by an auto starter, ensures the starting of the engine, and enables manual operation of the cheek when starting the engine manually (recoil starter). .

[0002]

[Prior art]

 Conventionally, the engine of various working machines equipped with a two-cycle gasoline engine or the like is started by an auto starter or a manual (recoil starter).

As shown in FIG. 4, an internal combustion engine 20, such as an air-cooled two-cycle gasoline engine, which serves as a power source, is a kind of power spreader of a backpack work machine equipped with the two-cycle gasoline engine. A blower 21 driven to rotate by 20, a chemical tank 22 arranged above the blower 21 and a fuel tank 23 arranged below them, a float or diaphragm type carburetor 1 and an air cleaner 2 and the like. ing.

[0004]

[Problems to be solved by the device]

 The backpack work machine described above is configured so that the mounted 2-cycle gasoline engine can be started by the auto starter device 15 or manually (recoil starter 17). However, when the worker carries the machine body on his back, It is not possible to operate the manual choke to start the engine and therefore choke by starting the engine in advance before carrying the fuselage or by providing a separate autostarter and choke remote control device. Was being operated remotely.

However, in the case of a manual choke that starts the engine in advance before carrying the machine body on its back, when the engine is temporarily stopped, the machine body is lowered each time and the engine is restarted while adjusting the choke. It is necessary to perform the operation, which is troublesome.

When the engine is started by the remote control device for the auto starter and the choke, which are separately provided, the choke operation is likely to be incomplete, which may cause the engine to start poorly, and further, the fuel may be sucked too much. There was a problem such as engine restart failure due to.

The present invention has been made in view of the above circumstances, and simplifies the starting operation by the auto starter to ensure the starting of the engine and, at the time of starting the engine manually (recoil starter), the choke is manually operated. An object is to provide a choke structure for an engine for a backpack work machine that can be operated.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a rotary shaft of a rotary solenoid that is controlled and rotated by an auto starter switch via a timer relay at one end of a choke rotary shaft and a rotary shaft of a manual choke lever at the other end. While being engaged, the rotation operation of the rotary shaft of the manual choke lever or the rotary solenoid does not affect the other rotation operation.

[0009]

[Action]

 According to the present invention, an operator can easily and properly start an engine with an auto starter while carrying a backpack work machine, and when the engine is started manually (recoil starter), the choke is manually operated as before. Can be operated without any trouble.

That is, in the present invention, when the engine is started by the auto starter, the rotary solenoid 7 is energized via the timer relay 8 and the rotary shaft 11 thereof is rotated and held for a predetermined time so that the choke 4 operates. The engine is reliably started.

Moreover, when the engine is started by the auto starter, the manual choke lever 10 side is not affected at all.

As described above, the choke 4 is actuated for a predetermined time through the timer relay 8 and the rotary solenoid 7 at the same time when the auto starter switch 16 is turned on, and the cheek 4 is also automatically operated to surely start the engine. .

Moreover, the engine can be manually started by the manual choke lever 10 (recoil starter 17) as usual.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially omitted exploded perspective view showing a choke structure of an engine for a backpack working machine according to an embodiment of the present invention, and FIGS. 2A and 2B are explanatory views showing a choke opening / closing state by a rotary solenoid. FIGS. 3 (A), 3 (B) and 3 (C) are explanatory views showing the opened / closed state of the choke by the manual choke lever, and FIG. 4 is an overall perspective view of a kind of power spreader of the backpack working machine.

As described above, the power spreader, which is a kind of backpack work machine, includes an internal combustion engine 20 such as an air-cooled two-cycle gasoline engine that serves as a power source, a blower 21 rotatably driven by the internal combustion engine 20, and a blower 21. It is composed of a drug tank 22 arranged above, a fuel tank 23 arranged below them, a carburetor 1, an air cleaner 2, and the like. In the figure, reference numeral 24 is a choke remote control device.

The present invention relates to an engine choke structure effective for the backpack working machine as described above.

In FIGS. 1 and 4, reference numeral 1 denotes a carburetor, which is a float or diaphragm type between the internal combustion engine 20 and the fuel tank 23, and is an oil-mixed gasoline supplied from the fuel tank 23. And the purified air supplied from the air cleaner 2 provided adjacent to each other is mixed to form the air-fuel mixture necessary for the operation of the internal combustion engine 20.

The air cleaner 2 is composed of a main body 2a adjacent to the carburetor 1 and a lid 2b adapted to the main body 2a. The lid 2b is adapted to the main body 2a to be illustrated. It is configured to accommodate a filter element.

Reference numeral 3 is a purified air flow path to the carburetor 1, and 4 is a yoke, and a chain piece 4 a of the chain yoke 4 opens and closes the air flow path 3.

The chain yoke 4 is integrally provided with cylindrical rotation support shaft portions 5 and 6 projecting from the lid body 2b and the main body portion 2a of the air cleaner 2 on both sides of the rear end proper position. It is rotatably supported by the air cleaner 2 by rotary support shafts 5 and 6, and a tip portion 4a of the yoke of the air cleaner is configured to open and close the air flow path 3 inside the air cleaner 2. ing.

In the figure, 7 is a rotary solenoid with a return spring, 8 is a timer relay for controlling the rotary solenoid 7, and 9 is an automatic starter device 15 including a starter controlled by a starter switch 16 and a battery. The power line 10 is a manual choke lever.

The present invention enables the opening / closing operation of the chuck 4 by the rotary solenoid 7 and the manual choke lever 10, and in that case, the opening / closing operation of one side is performed by the other side. The configuration does not affect the opening / closing operation.

A detailed example thereof is shown in FIGS. 2 and 3.

In FIGS. 2A and 2B, 11 is a rotary shaft of the rotary solenoid 7 and 12 is a rotary support shaft portion 5 provided on the rotary solenoid 7 side of the chain yoke 4. It is a semi-circular conforming hole.

Further, in FIGS. 3A, 3B and 3C, 13 is an engaging shaft portion of the manual choke lever 10 and 14 is a rotation shaft provided on the side of the manual choke lever 10 of the chain yoke 4. It is a semicircular fitting hole formed in the drive shaft portion 6.

2A and 2B, the sectional shape of the rotary shaft 11 of the rotary solenoid 7 and the matching hole of the rotary support shaft portion 5 provided on the side of the rotary solenoid 7 of the chuck yoke 4 are shown. 12 is a semi-circle of the same shape and is integrally engaged. Therefore, the rotation of the rotary shaft 11 of the rotary solenoid 7 is directly transmitted to the chuck 4 via the rotary support shaft portion 5 of the chain yoke 4, and the chain yoke 4 is opened and closed.

In the same figure, (A) shows the state where the yoke 4 is open, and (B) shows the state where the yoke 4 is closed with the yoke 4 acting.

In FIGS. 3A, 3B, and 3C, the matching hole 14 provided in the rotary support shaft portion 6 on the manual choke lever 10 side of the yoke 4 is formed in a semicircular shape. However, the cross-sectional shape of the engagement shaft portion 13 of the manual choke lever 10 has a fan-shaped cross section smaller than the semicircle by a predetermined angle, and the play space S is engaged with the matching hole 14.

In FIG. 2, (A) shows a state corresponding to FIG. 2 (A), that is, a state where the yoke yoke 4 is opened by the rotary solenoid 7 and (B) corresponds to FIG. 2 (B). The state, that is, the state in which the yoke 4 is closed by the rotary solenoid 7.

In FIGS. 3A and 3B, the engagement shaft portion 13 of the manual choke lever 10 is at the same position regardless of the opening / closing of the yoke 4 by the rotary solenoid 7, and the manual choke lever 10 is rotated. I can't. That is, the opening / closing operation of the chain yoke 4 by the rotary solenoid 7 is not transmitted to the manual choke lever 10 side.

In FIG. 3, (C) shows a state in which the choke yoke 4 is closed by the manual choke lever 10, and the rotary shaft 11 of the rotary solenoid 7 that is not energized rotates together.

In the above configuration, when the engine is started by the auto starter device 15, the yoke 4 is closed for a predetermined time.

That is, when the auto starter switch 16 is turned on, the rotary solenoid 7 is energized through the power supply line 9 and the timer relay 8 for a predetermined time (for example, 1 to 3 seconds), and the rotary shaft 11 of the rotary solenoid 7 is turned on. It is rotated and held for a predetermined time to close the choke 4, and at the same time, the engine is surely started.

When a predetermined time elapses after the engine is started, the power is cut off by the action of the timer relay 8, the rotary shaft 11 of the rotary solenoid 7 is returned by the return spring, and the choke 4 is automatically opened. However, the manual choke lever 10 is not rotated as described above.

Further, as described above, the choke lever 10 can be used to open / close the yoke 4, and the engine can be started manually (recoil starter) in the same manner as in the conventional case.

[0037]

[Effect of device]

 According to the present invention, the engine start operation by the auto starter in the backpack work machine is simplified, the engine start can be surely performed, and the engine start operation by the manual operation (recoil starter) is also possible. To be

[Brief description of drawings]

FIG. 1 is a partially omitted exploded perspective view showing a choke structure of an engine for a backpack working machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an opened / closed state of a choke by a rotary solenoid.

FIG. 3 is an explanatory diagram showing an opened / closed state of a choke by a manual choke lever.

FIG. 4 is an overall perspective view of a power spreader as an example of a backpack working machine.

[Explanation of symbols]

 1 Carburetor 2 Air cleaner 3 Air flow path, 4 Choke yoke 5 Choke yoke rotation shaft (one end) of rotary solenoid side 6 Choke yoke rotation shaft (other end) of manual choke lever side 7 Rotary solenoid, 8 Timer relay, 10 Manual choke lever 11 Rotary Solenoid Rotating Shaft 12 Compatible Hole 13 Manual Choke Lever Engaging Shaft 14 Compatible Hole 16 Auto Starter Switch S Play Space

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F02N 3/02 S 11/00 Z 11/08 N

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft (11) of a rotary solenoid (7) which is controlled and rotated by an auto starter switch (16) through a timer relay (8) to one end (5) of the choke rotary shaft, and the other end. Set the manual choke lever (1) to (6).
0) the engaging shaft portion (13) is engaged, and the rotary operation of the manual choke lever (10) or the rotary shaft (11) of the rotary solenoid (7) affects the other rotary operation. Engagement parts (11, 1)
2, 13, 14, S) are configured. A choke structure for an engine for a backpack working machine, characterized in that