JPH017613Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air duct device for a power cultivator that utilizes the handle strut as an intake passage to efficiently suck air.

Agricultural power tillers are used in environments with a lot of dirt and dust. Therefore, in order to avoid contamination with dirt, etc., it is necessary to provide the air intake to the air cleaner as high as possible.For example, the handle support is made into a tubular shape, and the air intake is located on the side where the handle is attached. An air duct device using the air intake passage for an intake passage is known.

Incidentally, this type of power cultivator has a body frame on which an engine and the like are mounted and supported, and the front end of the handle column is usually attached to the body frame. Therefore, the air intake path to the air cleaner has to be formed by drilling a hole in the middle of the handle column and connecting, for example, an air intake hose to the air cleaner. The bending caused an increase in air resistance, making efficient intake impossible.

In view of the above-mentioned circumstances, the present invention is designed to minimize the air resistance during air intake, allowing for efficient and effective intake, and also in this case, making it easy to attach the handle support. The purpose of the present invention is to provide an air duct device for a power tiller that can increase the installation strength.

In order to achieve this purpose, the present invention is applied to an air duct device for a power cultivator that uses a tubular handle strut as an intake passage, and its main structure is that the handle strut has openings at both ends, and a At the same time, an air cleaner is disposed in front of the front end opening of the handle support column, and the air cleaner and the front end opening are connected with a tube, thereby making the intake passage to the air cleaner substantially straight. It is characterized by the fact that it was formed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view of a power cultivator equipped with an air duct device according to the present invention, and FIG. 2 is a longitudinal sectional view of the air duct device and air cleaner according to the present invention.

First, in order to clarify the present invention, the schematic structure of a power cultivator will be explained with reference to FIG. In the power cultivator indicated by reference numeral 1 in the figure, a crankcase 3b of an engine unit 3 having a rearwardly inclined cylinder 3a is mounted and fixed on the front upper part of a vehicle body frame 2, and a fuel tank is mounted on the crankcase 3b. Equipped with 4 tanks. On the other hand, a transmission case 5 is integrally provided at the rear of the vehicle body frame 2, and a coupler 6 is provided at the rear upper part to which, for example, a resistance rod 7 during tilling is pivotally connected, and an axle 8 is mounted at the bottom of the case 5. A tilling rotor 9, for example, is supported through it.

Further, the upper side of the transmission case 5 is provided with a pulley (not shown in the figure) through which rotation is transmitted from the engine unit 3 side, and furthermore, a mounting body 11 for the handlebar strut 10 is fixed to the upper surface, and the mounting body 11 of the handle support 10 is fixed to the upper surface. The front part of the handle support column 10 is held and fixed to the frame part 11a. An air cleaner 12 is disposed substantially in front of this, and a pair of left and right handles 13, 13 are attached to the lower rear end of the column 10.

The handle strut 10, air cleaner 12, etc. constitute the essential parts of the present invention, and will be specifically explained below with reference to FIG. 2.

The handle strut 10 is formed into a tubular shape, and the front and rear ends have an opening cut approximately perpendicular to the axis, that is, a front end opening 10.
a, a rear end opening 10b is formed, and this rear end opening 10b serves as an air intake port communicating with the atmosphere. An end cover (hood) is provided above the rear end to prevent rainwater from entering.

On the other hand, the front cylindrical portion of the handle support column 10 is held and fixed by the mounting frame portion 11a of the mounting body 11 at an angle of inclination close to horizontal with, for example, a tightening bolt. Since the handle support 10 is formed integrally with the handle support 10 and is formed to fit over the outer peripheral surface of the cylindrical portion of the handle support 10, the handle support 10 can be easily and reliably held and fixed.

On the other hand, an air cleaner 12 is disposed in front of the front end opening 10a, that is, on the axial line of the handle column 10, and this air cleaner 12 has a base 15 at the bottom.
An L-shaped pipe 16 is integrally provided at the lower center of the base 15, and the tip of the L-shaped pipe 16 is connected to the engine unit 3 side to support the air cleaner 12 and to supply purified air. Form a ventilation path.
As a result, the air cleaner 12 is located behind the fuel tank 4 and above the cylinder 3a. On the base 15 is a cleaner case 1 with a downward opening.
7 is assembled by, for example, passing an elongated mounting bolt 8 through the center from above and screwing it into a screw hole 19 formed in the internal bend of the L-shaped tube 16, and an element 20 is installed inside. .

Further, a cylindrical flange 21 is integrally formed on the rear surface of the cleaner case 17, and in the embodiment, the axis of the handle support 10 is connected to the flange 21.
pass inside. An air intake port 21a is formed in the front surface of this flange 21. Therefore, the flange 21 and the front end opening 10a of the handle support column 10 are formed into an accordion shape, and a bendable tube 2 is formed.
2 can be connected.

Thus, the handle strut 10, the tube 22 and the flange 21 constitute an air duct device 23,
A substantially straight intake passage S (dotted line arrow) extends from the rear end opening 10b of the handle support column 10 to the air cleaner 12.
will be formed. In FIG. 2, the reference numeral 24 indicates a band ring that connects the tube 22 to the flange 21, and the reference numeral 25 indicates a flange portion that is integrally formed at the front end of the handle column 10 and that fits and locks with the tube 22.

It should be noted that in the above embodiments, any changes in the shape and structure of each part that do not depart from the gist are permitted within the scope of the present invention.

As is clear from the above explanation, the air duct device according to the present invention has an approximately linear intake passage to the air cleaner, which makes it possible to minimize air resistance during air intake, thereby effectively increasing intake efficiency. can be increased to

Moreover, since the front end opening of the handle strut is connected to the air cleaner side, there is no longer a suction part from the middle of the handle strut as in the past, and the strut can be securely mounted with an extremely simple mounting body installed on the transmission case. It can be provided as an air duct device for a power cultivator that has high technical and practical value, such as being able to hold and fix the handle column easily, and improving the mounting strength.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a power cultivator equipped with an air duct device according to the present invention, and FIG. 2 is a longitudinal sectional view of the air duct device and air cleaner according to the present invention. In the drawing, 5 is a transmission case, 10 is a handle support, 10a is a front end opening, 12 is an air cleaner, 22 is a tube, 23 is an air duct device,
S is an intake passage.

Claims (1)

[Scope of utility model registration request] In an air duct device for a power cultivator that uses a tubular handle strut as an intake passage, the strut is a hollow body with openings at both ends and no protruding obstacles on the inner surface, and the front part of the strut is connected to the upper part of the transmission case. At the same time, an air cleaner supported by the engine with an elbow is disposed in front of the front end opening of the strut, and the cylindrical flange of the air cleaner and the front end opening are connected with a tube. The openings at both ends and the air intake port formed on the front surface of the cylindrical flange of the air cleaner are formed approximately in a straight line, and the air cleaner element is placed inside the air cleaner facing the air intake port. Features of the air duct device for power tillers.