JP3401149B2 - Cultivator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cultivator, and more particularly to a swing mechanism for a work handle.

[0002]

2. Description of the Related Art FIG. 8 is a side view of a conventional cultivator. In the figure, reference numeral 101 is a main body casing, and a connection bar (not shown) is fixed to the main body casing 101 by bolts 102, 102, and a work handle 104 is swingable to the connection bar via a pin 103. It is provided. Further, the handle cover 1 is attached to the main body casing 101.
05 is provided, and the handle cover 105 is provided with recessed portions 105a and 105a in which the horizontal portions of the work handle 104 are located at the working position and the storage position, respectively. In addition, the support member 1 is attached to the main body casing 101.
06 is fixed, and a resistance rod 107 is provided on the support member 106 so that its position can be adjusted. Further, a knob bolt 108 is provided on the handle cover 105, and the knob handle 108 is configured to hold the work handle 104 at the work position. Further, the main body casing 101 is provided below the main body casing 101 in the figure.
A rotor 109 that is rotated by a drive unit (not shown) housed inside is provided. A holding piece 110 is fixed to the handle cover 105 with screws (not shown) or the like. The holding piece 110 is a work handle 10.
An auxiliary bar (not shown) is engaged at the storage position of No. 4 to hold the work handle 104 at the storage position.

In the conventional cultivator constructed as described above, when the work handle 104 is moved from the operating position shown in FIG. 8 to the storage position, the knob bolt 108 is used.
Is loosened, and the work handle 104 is rotated about the pin 103 in the counterclockwise direction in the drawing. At this time, since the horizontal portion of the work handle 104 also rotates, as shown in FIG. 9, the position of the recessed portion 105a of the handle cover 105 in which this horizontal portion is stored also changes.

[0004]

However, in the above-mentioned cultivator, although the recessed notches are formed at the two positions of the handle cover, they function at the actual operating position and the storage position, respectively. Since there is only one recessed portion and the other recessed portion is in a state where it is not stored at all, it was inferior in design. In addition, there is a problem in that two recessed portions must be formed, and the handle cover must be made larger accordingly. Furthermore, since the pin that supports the work handle is inserted into the connection bar, there is a limit to the size of the pin diameter, and there is a limit to increasing the strength. There was a problem that the degree was small.

The present invention has been made in view of the above-mentioned problems, and is good in design because a recessed portion formed in the handle cover is formed in only one place.
Moreover, it is possible to prevent the handle cover from increasing in size,
Further, it is an object of the present invention to provide a cultivator that can be made stronger by the connecting portion of the work handle.

[0006]

The invention according to claim 1 is
Drive unit casing (1), drive member housed in the drive unit casing (1), rotor (8) rotated by the drive member, and connection bar fixed to the drive unit casing (1). In a cultivator comprising a connecting member provided in (3) and a work handle (4) swingably provided in the connecting member, the connecting member is fixed to a connecting bar (3). Handle receiving part (1
1), a handle bracket (12) fixed to the work handle (4), and a handle fixture (13) fixed to the connection bar (3) , the work handle.
(4) is a recess formed in the handle receiving portion (11)
It is gripped by (11b) and the recess of the handle fixture (13).
The axis line (o) of the work handle (4)
It is characterized in that it is rotatably supported by the connection bar (3) and that the handle bracket (12) is fixed to the connection bar (3) by screwing a knob bolt (17) and a nut portion (12a). The invention according to claim 2 is a connection
Prevents the knob bolt (17) from falling out of the bar (3)
The nut (10) to
It is characterized in that it is screwed to the bolt (17) .

[0007]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a cultivator according to the present invention, and FIG. 2 is a rear view. In the figure, reference numeral 1 is a main body casing, and a connection bar 3 is fixed to the main body casing 1 via bolts 2 and 2. A work handle 4 made of a pipe material curved in a U shape is provided on the connection bar 3 via a connection mechanism described later so as to be swingable between a storage position and a work position. A trigger device 5 is provided near the grip portion 4a of the work handle 4. Further, the work handle 4 is provided with a reinforcing bar 4b in the horizontal direction to prevent the curved both sides from expanding. A support member 6 is provided on the connection member 3, and a resistance rod 7 is supported on the support member 6 in a state where the mounting position is adjustable.

On the other hand, a motor (not shown), which is a drive unit, is housed in the main body casing 1, and a rotor 8 rotated by this motor is rotatably provided below the main body casing 1. Although not shown, a reduction mechanism including a worm mechanism is interposed between the rotor 8 and the motor.

Next, the connecting mechanism between the connecting bar 3 and the work handle 4 described above will be described. 3 is an exploded plan view of this connecting mechanism, and FIG. 4 is a view taken along the line IV-IV in FIG. Holes 3a and 3b are formed on the end side of the connection bar 3, and the nut 10 is arranged between the holes 3a and 3b of the connection bar 3 and screwed and fixed to the knob bolt 17. The nut 10 prevents the knob bolt 17 from falling off. Also, the handle receiving portion 11 is provided at the end of the connection bar 3.
Is fixed, and the handle receiving portion 11 is formed with bolt insertion holes 11a, 11a and a concave portion 11b for receiving the work handle 4. Also, the work handle 4
A handle bracket 12 is fixed to the handle bracket 12 by fixing means such as welding, and a nut portion 12a is formed on the handle bracket 12. Further, holes 13a and 13b are formed in the handle fixture 13, and a nut portion 13c is formed below the lower hole 13b in FIG. Then, with the nut portion 12a of the handle bracket 12 and the hole 3b of the connection bar 3 aligned, the washer 14, the spring 15, the spring spacer 16, and the washer 14 from the hole 3a side.
The knob bolt 17 is inserted through the screw and is screwed to the nut 10 and the nut portion 12 a of the handle bracket 12. At this time, the work handle 4 has the handle receiving portion 1
It is arranged so that it can be located in the first recess 11b. Further, the handle fixture 13 is inserted so as to hold the work handle 4, and the holes 13a, 13 of the handle fixture 13 are inserted.
b and the bolt receiving holes 11a, 11a of the handle receiving portion 11
Are aligned and the bolt 18 is inserted, and the bolt 18 is screwed into the nut portion 13c of the handle fixture 13. FIG. 5 is a cross-sectional view showing this connection state.

On the other hand, in FIG. 1, a holding piece 1a is integrally formed on the main body casing 1. Since the holding piece 1a is integrally formed with the main body casing 1 as described above, there is no need to separately attach the adjustment piece, and no adjustment is required.
It is easy to assemble and does not require a fixture such as a screw, so that the number of parts can be reduced. Further, the main body casing 1 is provided with a handle cover 9 so as to cover the connection bar 3, the connection portion between the connection bar 3 and the work handle 4, and the like. The handle cover 9 is formed with a recess 9a for positioning the work handle 4.

The operation when using the cultivator having the above-mentioned structure will be described below. The operator grips the grip portion 4 a of the work handle 4 and pulls the trigger of the trigger device 5. As a result, the motor (not shown) is energized, and the motor shaft (not shown) of the motor rotates. With the rotation of the motor shaft, the rotor 8 rotates via a reduction mechanism such as a worm (not shown) and a worm wheel (not shown). In this state, the fields can be cultivated.

When the cultivator is transported and stored after the work is completed, the knob bolt 17 is first loosened in FIG. 5, and the knob bolt 17 and the nut portion 12a of the handle bracket 12 are unscrewed. At this time, even though the knob bolt 17 is released from the screwed state with the nut portion 12a, the nut 1
Since 0 is still in the screwed state, it will not fall out. In this state, the work handle 4 is rotated counterclockwise around the axis o of the work handle 4 in the figure, and the reinforcing bar 4b of the work handle 4 is integrally formed on the main body casing 1 by a holding piece. 1a is engaged. As a result, the work handle 4 is held in the state shown in FIG.

At this time, since the work handle 4 rotates about the axis o of the work handle 4, the work handle 4 near the connection portion moves with respect to the handle cover 9 between the work position and the storage position. Handle cover 9
It is not necessary to form the recessed portions 9a at the two positions, and the handle cover 9 need not be designed large. Moreover, since the center of rotation of the work handle 4 is on the work handle 4 itself, it is not necessary to set a separate pin, and the strength can be improved compared to the case of supporting by the pin.

Further, when moving the working handle 4 from the storage position to the working position, the reinforcing bar 4b of the working handle 4 is removed from the holding piece 1a of the main body casing 1,
The handle bracket 12 fixed to the work handle 4 is brought into contact with the bottom surface of the connection bar 3 by rotating clockwise in FIG. At this time, since the nut portion 12a of the handle bracket 12 is designed to be aligned with the hole 3b of the connection bar 3, the knob bolt 17 is tightened in this state so that the knob bolt 17 and the nut portion 12a are screwed together. As a result, the work handle 4 is held at the work position.

FIG. 7 shows the connecting bar 3 of the tiller according to the present invention.
It is a figure which shows other embodiment of the connection mechanism of this and the handle 4 for work. In the present embodiment, when fixing the handle fixture 13 in the above-described embodiment, the bolt 18 is used, but the engaging protrusions 13d, 13d protruding outward without using the bolt 18. Are formed at both ends, and are engaged and fixed in the engagement holes 3c, 3c formed in the connection bar 3.

In the above-described embodiment, the handle receiving portion 11 and the connecting bar 3 are formed separately, and the handle receiving portion 11 is fixed to the connecting bar 3.
The connection bar 3 may be integrally formed with a component corresponding to the handle receiving portion 11. Further, in the above-described embodiment, the case where the drive unit is an electric cultivator using an electric motor is described, but the mechanism according to the present invention is not limited to the electric cultivator. ,
It can be used even in a tiller operated by an internal combustion engine such as diesel. Further, in the above-described embodiment, the holding piece 1a is attached to the main body casing 1
However, the holding piece does not necessarily have to be formed integrally with the main body casing 1, but may be formed integrally with the handle cover 9, for example.

[0017]

As described above, according to the present invention, since the working handle itself rotates about the axis of the working handle, the working handle near the connecting portion is attached to the handle cover at the working position and the storage position. Since it does not move with respect to the handle cover, only one recess is required to be formed in the handle cover, and it is not necessary to form two recesses, so there is no need to design the handle cover in a large size, and in terms of design. Since there are no recesses that do not work, it is not inferior. Moreover, since the work handle is connected by the connection mechanism that does not use the pin, the strength of the connection portion can be improved, and the degree of freedom in design can be increased.

[Brief description of drawings]

FIG. 1 is a side view of a cultivator according to the present invention.

FIG. 2 is a rear view of the cultivator according to the present invention.

FIG. 3 is an exploded plan view of a connection mechanism between a connection bar and a work handle.

4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a cross-sectional view showing a mounting state of a connection bar and a work handle.

FIG. 6 is a side view of the cultivator according to the present invention.

FIG. 7 is a view showing another embodiment of the connection mechanism between the connection bar of the cultivator and the work handle according to the present invention.

FIG. 8 is a side view of a conventional tiller.

FIG. 9 is a side view of a conventional cultivator.

[Explanation of symbols]

1 ... Main body casing 3 ... Connection bar 4 ... Work handle 11 ... Handle receiving part 12 ... Handle bracket 13 ... Handle fixing tool 17 ... Knob bolt o ... axis

Claims (2)

(57) [Claims] 1. A drive unit casing, a drive member housed in the drive unit casing, a rotor rotated by the drive member, and a connection member provided on a connection bar fixed to the drive unit casing. In the cultivator provided with a work handle swingably provided to the connection member, the connection member has a handle receiving portion fixed to the connection bar, and a handle bracket fixed to the work handle, The work handle is formed in the handle receiving part, separated from the handle fixing device fixed to the connection bar.
The concave part of the handle and the concave part of the handle fixture.
Connected so that it can rotate around the axis of the work handle.
A cultivator supported by a bar, and a handle bracket fixed to the connection bar by screwing a knob bolt and a nut portion. 2. The knob bolt is prevented from coming off from the connection bar.
A nut to prevent is screwed into the knob bolt in the connecting bar.
Tillage machine according to claim 1, characterized in that it is.