JP2595576Y2 - Small tiller - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small cultivator, and more particularly, to a small cultivator having a mechanism capable of appropriately adjusting a mounting angle of a wheel and a handle with respect to a body axis.

[0002]

2. Description of the Related Art Conventionally, as a cultivator suitable for plowing or weeding relatively narrow land such as a home garden or a house, a motive motor, a tilling rotor connected to the motive motor by a drive shaft, and 2. Description of the Related Art A small tiller having a wheel located behind a tillage rotor and supporting a machine body together with the tillage rotor and a handle for operating the machine body is known.

In this type of small cultivator, the tilling rotor and the wheels are positioned in a straight line, and the straight traction operation is performed, thereby performing a work with a very narrow width corresponding to the left and right width of the tilling rotor. By performing the work while moving forward while swaying the tilling rotor left and right around the wheel, a wide work corresponding to the swing width of the tilling rotor is performed.

Here, the magnitude of the swing width of the tilling rotor depends on the longitudinal distance between the tilling rotor and the wheels. Therefore, in order to increase the tillage width, it is better that the distance between the front and rear of the tillage rotor and the wheel is larger.

[0005] On the other hand, if the distance between the small rotor and the wheels is too large, it is inconvenient for use in a situation where the space is not sufficient, such as in a house.

[0006]

However, in the conventional small cultivator, the tilling rotor and the wheels are fixedly provided, and the distance between them is fixed.

[0007] For this reason, one cultivator could not sufficiently meet the requirements of both use in an extremely narrow range and use in a somewhat wide range.

The present invention has been made in view of the above-mentioned circumstances. The distance between the tilling rotor and the wheels can be appropriately adjusted, the vertical position of the handle can be changed, and the distance adjustment and the handle can be adjusted. Up and down position adjustment can be performed at the same time and work as a reversing rotor
An object of the present invention is to provide a small cultivator that can be operated, has good operability, and is widely used.

[0009]

Means for Solving the Problems In order to solve the above problems, a small cultivator according to the present invention comprises a prime mover, a tilling rotor driven by the prime mover, wheels for supporting the fuselage together with the tilling rotor, and and a handle for manipulating the handle and wheel support rod for supporting the wheel, the common is configured to be swingable and fixed vertically to a horizontal mounting axis as an axis Rutotomoni the relative said machine body Both
Airframe support tube that intersects a common horizontal mounting axis
Is configured so as to be rotatable and fixable around .

[0010]

When the distance between the cultivator rotor and the wheel is to be increased, the wheel support rod is fixed by rotating the wheel around the common horizontal mounting shaft in a direction away from the cultivator rotor. At this time, since the grip position of the handle is lowered from the initial position, together with the rotation adjustment of the wheel support rod,
The handle is fixed by adjusting pivoted to a height not easy to operate the aircraft about a year common horizontal mounting shaft. In this state, if the work is performed while swinging the tillage rotor left and right around the wheel, the left and right swing width of the tillage rotor becomes wider than the initial width, and a wide work can be performed.

Conversely, when working in a narrow place such as a furrow of a greenhouse, the wheel support rod is turned around the common horizontal mounting shaft in a direction in which the wheel approaches the tilling rotor. While moving and fixing, the handle is operated around the common horizontal mounting axis to operate the fuselage.
Rotates adjusted fixed to have Yasu height. Further reverse rotation rotor
It is also possible to perform the work as a key.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view showing one embodiment of the present invention. In the drawing, reference numeral 2 denotes a prime mover such as an air-cooled two-cycle gasoline engine, 3 denotes a fuel tank of the prime mover, and 4 denotes, for example, tilling. And a drive shaft 3 for transmitting the driving force of the prime mover 2 to the tillage rotor 4 via a not-shown bevel gear and a rotor drive shaft 31.
A vertically extending body support pipe 0 is inserted therein. Reference numeral 6 denotes a wheel which is located behind the center between the tillage rotors 4 and 4 and supports the body 1 together with the tillage rotors 4 and 4. Reference numeral 7 denotes a body 1
Is a handle for operating the handle 7, and a grip at the upper end of the handle 7 is shown.

Reference numeral 9 denotes a rotor cover, 10 denotes an operation lever of the prime mover 2, and 32 denotes a rotor mounting bracket.

The wheel 6 is rotatably supported at the lower end of a wheel supporting rod 11 by an axle 12 so as to be freely rotatable.
The upper end base 11a is attached to the body support tube 5 together with the lower end base 7a of the handle 7 so as to swing and be fixed.

The details of the attachment will be described.
As shown in FIG.
3 a and a horizontal cylinder portion 13 b, a mounting bracket 13 for fixing two bars in an orthogonal state, and tightening means such as a bolt 14 in a state where the body support tube 5 is inserted into the vertical cylinder portion 13 a. only it is fastened using.

The horizontal cylindrical portion 13b of the mounting bracket 13 is located on the rear side of the body 1, and the left and right ends of the horizontal cylindrical portion 13b are formed in a forked shape with a width adapted to the length of the horizontal cylindrical portion 13b. Between the forked portions 15 of the handle base 7a. At the end of the forked portion 15, mounting shaft insertion holes 16 and 17 are respectively formed. The mounting shaft insertion holes 16 and 17 are provided on the base 11a of the wheel supporting rod 11 in parallel with the axle 12, and in the vertical direction. Crosses with the extended body support tube 5
In this direction, a common horizontal mounting shaft 18 is inserted, and is mounted together with the handle 7 on the horizontal cylindrical portion 13b.

The wheel support rod 11 is connected to the wheel 6
Are appropriately bent so as to be positioned on the center line in the front-rear direction of the body.

[0019] Co projecting from the said wheel support杆基portion 11a
A chrysanthemum seat 19 is formed around the base of the through horizontal mounting shaft 18, and the chrysanthemum is also formed around the mounting shaft insertion hole 16 on the wheel support rod base 11 a side of the forked portion 15 of the handle base 7 a. A chrysanthemum seat 20 corresponding to the seat 19 is formed. And between the respective chrysanthemums 19 and 20, the common
A spring 21 inserted through the horizontal mounting shaft 18 is interposed and constantly biases the two chrysanthemum seats 19 and 20 in a direction away from each other.

The common member inserted through the horizontal cylindrical portion 13b
The tip 18a of the horizontal mounting shaft 18 projects outward from the mounting shaft insertion hole 17 on the right side of the forked portion 15, and has a cap nut 22 having a thread groove formed at the common horizontal mounting shaft tip 18a. Is tightened and fixed.

In the above configuration, the cap nut 22
Is loosened, the meshing state between the two chrysanthemum seats 19 and 20 is released by the urging force of the spring 21, so that the wheel support rod 11 and the handle 7 can move in the vertical direction with the common horizontal mounting shaft 18 as an axis. To rotate freely. Then, the wheel support rod 11 and the handle 7 are set to a desired vertical angle with respect to the body support tube 5 and the cap nut 22 is tightened again, so that the tilling rotor 4
The distance between the wheel and the wheel 6 and the height position of the grip 8 of the handle 7 are set to appropriate sizes according to the working conditions.

The wheel support rod 11 and the handle 7 are connected to chrysanthemum seats 19, 20 formed on respective bases 11a, 7a.
Are firmly fixed to each other by the meshing of the tillers, so that the positional relationship between the two does not change during use of the cultivator unless the cap nut 22 is loosened. In addition, the common
The mounting angle of the wheel support rod 11 and the handle 7 with respect to the machine body 1 can be changed at the same time simply by loosening the cap nut 22 screwed to the tip 18a of the horizontal mounting shaft 18, so that the machine body posture according to the working condition can be changed with one touch. Can be obtained.

FIG. 3 is an exploded plan view showing another embodiment of the mounting structure of the wheel support rod 11 and the handle 7 to the body support tube 5 (the same members as those described above are denoted by the same reference numerals as above). Shown).

In this embodiment, the concept of the mounting bracket 23 and the base 24a of the handle 7 is different from the above. That is, the mounting bracket 23 includes a vertical cylindrical portion 23a and a horizontal cylindrical portion 23b.
26 are formed. A chrysanthemum seat 27 is also formed on the handle base 24a, and the horizontal cylinder portion 23b is interposed between the wheel support rod base 11a and the handle base 24a via springs 28 and 29 so that the chrysanthemum seats are connected to each other. (19 and 25, 26 and 27) are opposed to each other, and the common horizontal mounting shaft 18 protruding from the wheel support rod base 11a is inserted. And it is configured to fasten to the tip 18a of the common horizontal mounting shaft 18 is covered with a cap nut 22.

In this embodiment, too, the cap nut 22 is loosened to shift the engagement between the chrysanthemum seats (19 and 25, 26 and 27) so that the mounting angle of the wheel support rod 11 and the handle 7 can be freely adjusted. Changes can be made in the same manner as described above.

In the cultivator constructed as described above, the operator operates the prime mover 2 to grip the handle grip 8 and operates the handle 7 to position the wheel 6 behind the tilling rotor 4. Tillage work while moving forward. Then, as shown in FIG. 4, if the vehicle is driven straight, the cultivation with the minimum width L is performed. If the body is shaken with the handle 7 about the wheel 6 located on the rear side of the tilling rotor 4 and the tilling rotor 4 is moved forward and backward while swinging the tilling rotor 4 left and right, a wide width M tilling is performed.

Further, if the cap nut 22 is loosened and the wheel supporting rod 11 is rotated backward to widen the interval between the tilling rotor 4 and the wheel 6, the tilling while swaying the tilling rotor 4 right and left. Thereby, the tilling of the width N wider than the width M becomes possible.

Further, in the cultivator of the present invention, the bolt 14 of the vertical cylindrical portion 13a (23a) of the mounting bracket 13 (23) which is fastened and fixed to the body support tube 5 is provided.
The loosened, be fixed by rotating 180 degrees Ri periphery of the handle 7 and the wheel supporting rods 11 each of the body support tube 5, it is possible to work as a reverse rotor.

In addition, the handle 7 and the wheel support rod 11 can be easily removed by removing the cap nut 22, which is convenient for packing, transportation, maintenance, and the like.

The tilling rotor 4 shown in FIG. 1 is adapted to various working conditions such as hard and soft cultivated land and shallow cultivating depth.
For example, the rotor can be appropriately replaced with various types of rotors indicated by reference numerals 4a, 4b, and 4c. Further, even when the same tilling rotor 4 is used, FIG.
If the deep dish-shaped ring component as shown by is properly mounted, it is possible to prevent excessive deep tillage due to the weight of the cultivator.

[0031]

According to the present invention, the distance between the wheel and the tilling rotor and the vertical position of the handle can be simultaneously changed by a single operation, so that the adjusting operation according to various working conditions can be quickly performed with a small number of operations. This makes it possible to obtain a small cultivator having a wide range of use and good operability.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is an exploded plan view of a main part showing another embodiment.

FIG. 4 is a schematic plan view showing a change in working width by the cultivator according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Body 2 Prime mover 4 Tilling rotor 5 Body support pipe 6 Wheel 7 Handle 11 Wheel support rod 18 (Common) horizontal mounting axis

Claims (1)

(57) [Scope of request for utility model registration] 1. A tilling rotor (4) driven by a prime mover (2), wheels (6) for supporting a body (1) together with the tilling rotor (4), and a handle (7) for operating the body (1). ) and a, the wheels (6) wheel support rod for supporting the (11), wherein a handle (7), but vertical common horizontal mounting axis (18) as the axis relative to the machine body (1) is swung and fixed freely configured to Rutotomoni, the
Extends vertically across a common horizontal mounting axis (18)
A small cultivator configured to be freely rotatable and fixed around an airframe support tube (5) .