JPH0319689Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a backpack-type brush cutter, and more particularly, to a backpack-type brush cutter that is convenient to handle during assembly work.

[Conventional technology]

A conventional backpack-type brush cutter has a small engine mounted on a backpack frame with a backpack strap. Using this engine as a mounting base, a clutch housing and a fuel tank are attached to the engine, and the output shaft is connected to the engine via a centrifugal clutch. A flexible transmission shaft is connected, and the other end of this transmission shaft is connected to the transmission shaft of the operating rod. The lower part of the engine is rotatably attached to the backpack frame, and when the control rod is swung from side to side during brush cutting work, the engine can also swing in conjunction with the swing movement, allowing for flexible movement from the engine to the control rod. The transmission axis has been devised so that it can draw an arc.

[Problem that the invention attempts to solve]

Generally, when assembling this type of brush cutter, the gasoline tank is attached to the engine, and a shoulder frame, clutch housing, and even flexible tube are attached to the engine. This is an assembly process in which other parts are attached to the finished product, and as the finished product becomes heavier, the assembly process gradually becomes less efficient.

[Means to solve the problem]

Therefore, this invention aims to provide a brush cutter that is easy to handle and assemble during assembly work, has a novel design, and is easy to operate during brush cutting work. Instead of directly mounting the engine, the engine mounting frame, which is U-shaped when viewed from the front, is attached to the backpack frame so that it can rotate freely around the vertical axis.The engine mounting frame is used as a mounting base, and the clutch housing is attached to the vertical frame. Furthermore, the structure is such that the gasoline tank can be attached to the upper end of the engine-mounted frame, and the engine is mounted to the clutch housing of the engine-mounted frame instead of attaching the flexible transmission shaft and flexible tube to the clutch housing attached to the engine. The assembly work is performed by attaching the flexible transmission shaft and connecting the flexible tube.

[Effect]

In the backpack-type brush cutter of this invention, the engine mounting frame is rotatably attached to the backpack frame, and the engine is attached to this frame, so by attaching the heavy engine last in the assembly order, handling of semi-finished products during assembly is easy. It's easy.

【Example】

Examples of this invention are shown below in Figures 1 to 6.
This will be explained using figures. First, Fig. 1 is an overall side view of a backpack-type brush cutter equipped with an engine-mounted frame device according to this invention, and numeral 1 indicates a hollow operating rod, and a gear box 2 constituting a speed reducer is installed at the tip of the rod. A cutting blade 3 is attached to the other end via a flexible tube 4, and an engine 5 is attached to the other end via a flexible tube 4.
is installed. The engine 5 is attached to a backpack frame 6 via an engine mounting frame, which will be described in detail later, and a backpack band 7 attached to the backpack frame 6 allows the worker to carry it on his or her back. It's getting old. Next, the engine mounting frame 10 will be explained. This mounting frame 10 has a bearing-type mounting frame 12 into which a pivot can be inserted into the lower end of a generally vertical frame 11, and is formed in an L-shape with respect to the vertical frame.
The fuel tank support frame 13 is bent into a shape parallel to that of the fuel tank support frame 13, and this fuel tank support frame 13 has a bifurcated fork shape. The intermediate portion of the vertical frame 11 has a cylindrical shape in which the end of the flexible transmission shaft 41 and the end of the flexible tube 4 are detachably connected, and accommodates the clutch drum 43 which is supported by the bearing portion 42. A clutch housing 11a is formed. The space surrounded by the vertical frame 11 having such a clutch housing, the mounting frame 12, and the fuel tank support frame 13 is a housing space for the engine 5, and the flange 51 around the end of the output shaft of the engine 5 is Said clutch housing 1
The engine 5 is mounted on the mounting frame 10 by being aligned with the opening of 1a and bolted. In this state, the centrifugal clutch 52 attached to the output shaft end of the engine 5 connects the clutch drum 43 to which the shaft end of the flexible transmission shaft 41 is connected.
It is located in the internal space of. The mounting frame 12 of the mounting frame 10 has a bearing part 12a provided at the end thereof, and a pivot 6 that is erected on the backpack frame 6.
1 and is rotatable about this pivot shaft 61. The fuel tank support frame 13 has a substantially U-shape in plan view, and in addition, the fuel tank 14 has a substantially mouth shape in plan view, and a flange 14a extending from a position corresponding to the bottom of the mouth shape is attached to the fuel tank support portion 14. It is placed on a columnar female screw 13a provided in the holder and fixed with a screw 14b through a screw hole. A columnar female threaded portion 13b is also formed at the tip of the fuel tank support frame 13, and a flange 14c formed to extend inside the fuel tank 14 is placed on this female threaded portion 13b and is attached through the screw hole with screws 14d. . A concave groove 14e is formed in the upper surface of the mouth-shaped fuel tank 14 on the flange 14c side, and serves as a space through which a tension cord leading to a spark plug 53 of the engine 5 can pass. In the backpack type brush cutter of this invention, most of the work process is done by attaching the engine 5, which is heavy and difficult to handle, to the mounting frame 10 near the end of the process. Furthermore, only light work such as the fuel tank 14 has to be handled, and work that involves overturning, reversing, etc. becomes light labor.

[Effects of the invention] As is clear from the above explanation, the backpack-type brush cutter of this invention has a clutch housing that houses a centrifugal clutch connected to the output shaft of the engine in a mounting frame that is attached to the backpack frame via a pivot. Since the structure is designed so that the fuel tank can also be attached, the heavy engine, which is difficult to handle, can be attached to the clutch housing of the mounting frame in the final work process when assembling a backpack-type brush cutter, which is difficult to assemble. Since it can be attached to and assembled, the work is extremely easy.

[Brief explanation of the drawing]

The attached drawings show an embodiment of this invention, and FIG. 1 is a side view of the entire backpack-type brush cutter, FIG. 2 is a side view of the engine section, FIG. 3 is a plan view of the same, and FIG. 4 is a side view of the entire backpack-type brush cutter. An enlarged sectional view along the line, Fig. 5 is Fig. 4-
FIG. 6 is an enlarged cross-sectional view taken along the line, and FIG. 6 is a perspective view of the mounting frame alone. 1... Operating rod, 3... Cutting blade, 4... Flexible tube, 5... Engine, 6... Back frame, 7
...Backpack band, 10...Mounted frame, 11...
...Vertical frame, 12...Mounting frame, 12a...
... Bearing part, 13 ... Fuel tank support frame, 1
3a, 13b...female threaded portion, 14...fuel tank.

Claims (1)

[Scope of utility model registration request] A backpack-type brush cutter configured by rotatably mounting an engine on a backpack frame, which includes a mounting frame consisting of a vertical frame, a mounting frame bent in a direction substantially perpendicular to both upper and lower ends of the vertical frame, and a fuel tank support frame. , the mounting frame is rotatably supported on a backpack frame, the fuel tank is attached to the fuel tank support frame, a clutch housing is formed in the vertical frame in which a centrifugal clutch is housed, an engine is attached to the clutch housing, and , a backpack-type brush cutter with a structure that supports a flexible transmission shaft and tube.