JP2931526B2 - Rotary tillage device and its winding prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a winding mechanism for preventing the rotary cultivator and its <br/>.

[0002]

2. Description of the Related Art For example, in a rotary tilling device of a side drive type, a large number of claw brackets having a fitting concave portion at the tip are provided on the outer peripheral surface of a tilling shaft rotatably supported around an axis outside the tilling shaft. The tilling nail is fixed to the tilling shaft by bolting the base end of the tilling nail fitted into the fitting recess to the nail bracket.

In this case, in order to prevent a long culm such as grass from winding around the tilling shaft, a long linear member along the axial direction of the tilling shaft may be provided at a distance from the tilling shaft. Conventionally, such a linear member is attached to a tilling shaft by fixing each mounting stay supporting both ends and an intermediate portion of the member to one of the claw brackets. In this case, the tilling claw is fixed to the claw bracket. The mounting stay is fixed to the side surface of the claw bracket by fastening the mounting stay together with bolts (see Japanese Utility Model Laid-Open No. 4-110402).

[0004]

However, in the above-described conventional anti-winding mechanism, since the mounting stay is fastened to the side of the nail bracket together with the bolt for fixing the tilling nail, the long culm such as grass is a linear member. When a moment around the bolt is generated on the mounting stay by winding around the bolt, the bolt may be loosened by this moment, so that the tilling nail may rattle or fall off.

[0005] In order to effectively secure the winding action of the long culm, it is necessary to move the linear member as far as possible from the tilling shaft within a range that does not hinder the tilling action of the tilling claw. However, conventionally, since the mounting stay is fixed to the side surface of the claw bracket by the bolt, the longer the linear member is to be separated from the tilling axis, the longer the arm length of the mounting stay has to be. Therefore, a moment for loosening the bolt is easily generated, and the supporting force of the mounting stay for supporting the linear member is also reduced.

In view of such circumstances, the present invention prevents the tilling claw from rattling by the mounting stay supporting the linear member, and reduces the supporting force of the mounting stay without reducing the supporting force of the mounting stay. It is an object of the present invention to allow a shaped member to be attached at a distance from a tilling shaft.

[0007]

In order to achieve the above object,
The present invention has taken the following technical measures. That is, according to the present invention, a large number of claw brackets each having a fitting concave portion at a tip thereof are provided on an outer peripheral surface of a tilling shaft rotatably supported around an axis so as to protrude in a radially outward direction of the tilling shaft. The base end of the tilling claw fitted into the concave portion is bolted to the claw bracket, and any one of the claw brackets supports a linear member along the axial direction of the cultivation shaft at a distance from the cultivation shaft. In the winding prevention mechanism of the rotary tilling device to which the stays are respectively fixed, an insertion hole through which the base end of the tilling claw can be inserted is provided in the mounting stay, and the insertion hole corresponds to the fitting recess. The mounting stay, which is in contact with the tip of the claw bracket, stops at the tip of the claw bracket by being retained by a retaining portion formed on the tilling claw that passes through the insertion hole and fits into the fitting recess. Fixed And wherein the Rukoto.

In this case, of the plurality of mounting stays supporting the linear member, one mounting stay is connected to the linear member so as not to be movable in the axial direction, and the other mounting stay is connected to the linear member. Thus, the connection can be made freely movable in the axial direction with play and rotatably. Further, among the plurality of mounting stays supporting the linear member, the mounting stay supporting the end of the linear member is connected to the linear member so as to be non-axially movable and swingable. Is also good.

The present invention further provides a rotary transmission case under
Tilling shaft rotatably provided in the section and the outer periphery of this tilling shaft
Numerous nail brackets protruding from the surface and each nail bracket
A tilling claw to be attached to the
And a linear member arranged along the axial direction thereof.
And the base end of the tilling claw is inserted
And a mounting stay having an insertable through-hole.
In the rotary tiller with come prevention mechanism, the tilling claws
Is attached when the base end thereof is inserted through the insertion hole.
It is specially equipped with a retaining part for retaining the stay.
Sign.

[0010] The present invention also relates to the above rotary tilling device.
In the mounting stay, the base end is inserted through the insertion hole.
Characterized in that the tilling claw is retained by the
You.

[0011]

According to the present invention, by retaining the mounting stay 29 by the retaining portion 31 and 34 spots were formed on hydroponic耘爪20, since the fixing the mounting stay 29 with the claw bracket 23, the length of such grass Even if the culm is wound around the linear member 28 and a moment is generated in the mounting stay 29, all of the moment acts on the base end of the tilling claw 20 and does not affect the bolt 24 to which the tilling claw 20 is attached. .

The mounting stay 29 is provided with the claw bracket 23.
Therefore, even when the linear member 28 is separated from the tilling shaft 8 by a considerable distance, it is not necessary to lengthen the arm length of the mounting stay 29 so much.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show a first embodiment of the present invention. In the present embodiment, the present invention is applied to a rotary tilling device 1 of a side drive type. 2 and 3, the rotary tilling device 1 is mounted on a tractor 2 via a three-point link mechanism 3, and a chain case 6 is provided at both ends of a support arm 5 extending left and right from a power receiving gear box 4. And a side frame 7.

The chain case 6 and the side frame 7
A bearing case 9 for rotatably supporting the tilling shaft 8 around its axis is attached to the inside of the lower end of the tractor 2. A power receiving shaft 10 protruding forward from the gear box 4 is provided with a PTO of the tractor 2. The shaft 11 is interlocked by a joint 12. Inside the support arm 5,
A transmission shaft 14 that is driven via the power receiving shaft 10 and the gear 13 is provided therein. A sprocket 15 provided above the chain case 6 is fixed to one end of the transmission shaft 14. A transmission chain 17 of this sprocket 15 and a sprocket 16 provided at one end of the cultivating shaft 8 is wound around, so that the cultivating shaft 8 is rotated by the driving force of the PTO shaft 11.

A power transmission system to the PTO shaft 11 inside the tractor 2 is provided with a one-way clutch (not shown), which causes the tilling shaft 8 to rotate in the rotational drive direction (the direction of arrow A in FIG. 3). It is made possible to idle and does not idle in the opposite direction, thereby reducing the impact on the gears of the PTO power transmission system. Also, as shown in FIG.
The support frame 5 has a rectangular frame-like support frame 1 in a plan view.
8 is projected rearward, and a grounding wheel 19 for adjusting a tilling height is provided at a rear portion of the support frame 18.

As shown in FIGS. 1 and 2, on the outer peripheral surface of the tilling shaft 8, a tilling portion 21 formed by arranging a large number of tilling claws 20.
The upper part of the tilling part 21 is covered with a cover 22. That is, on the outer peripheral surface of the tilling shaft 8, a large number of claw brackets 23 each having a rectangular cylindrical shape having a fitting recess 23 </ b> A at the tip are provided so as to protrude radially outward of the tilling shaft 8. Tilling claw 20 fitted in mating recess 23A
Bolts 24 are fastened to each other so that a large number of tilling claws 2
Numerals 0 are radially attached to the outer peripheral surface of the tilling shaft 8.

At the left and right side walls of the claw bracket 23 and the base end of each tilling claw 20, through holes 25 and 26 for bolts 24 are provided. When the ends are fitted, the two through holes 25,
26 are concentrically positioned. The bolts 24 inserted in the axial direction of the tilling shaft 8 into the concentrically positioned through holes 21 and 22 are tightened with nuts 27 so that the tilling claw 20 is fixed to the claw bracket 23.
Can be fixed against

In the illustrated example, the claw bracket 23 is formed in the shape of a rectangular tube. However, the bracket 23 may be formed of a pair of plate pieces which are spaced apart from each other in the axial direction of the tilling shaft 8 and opposed to each other. The tilling unit 21 of the rotary tilling device 1 includes:
In order to prevent a long culm such as grass from winding around the tilling shaft 8,
The long linear member 28 along the axial direction of the tilling shaft 8
It is provided apart from the.

The linear member 25 of this embodiment is made of a long steel rod slightly shorter than the tilling shaft 8, and has three mounting stays 29 at both ends and an intermediate portion. Each of the mounting stays 29 is fixed to the claw brackets 23 located at both ends in the axial direction of the tilling shaft 8 and at an intermediate portion thereof, and supports the linear member 25 at three points in a state where the linear member 25 is separated from the tilling shaft 8. . Each mounting stay 29 is formed in a rectangular shape that is substantially the same as or slightly larger than the opening edge of the tip of the claw bracket 23, and has an insertion hole 30 through which the base end of the tilling claw 20 can be inserted. On the other hand, the mounting stay 29
The reinforcing ribs 31 functioning as retaining portions of the rim are integrally formed.

As shown in FIG. 1 (a), each mounting stay 29 is brought into contact with the opening edge of the corresponding claw bracket 24 so that the insertion hole 30 corresponds to the fitting recess 23A. . After that, each mounting stay 29 is
When the base end of the tilling claw 20 is retained by the reinforcing rib 31 of the tilling claw 20 when it is fitted into the fitting recess 23A through the insertion hole 30, the base end of the tilling claw 20 is then fastened by the bolt 24. It will be fixed to each pawl bracket 23.

In this embodiment, as described above, the linear member 28
Of the linear members 28 among the three mounting stays 29 supporting the
1A (the right end in FIG. 1A) is connected to the linear member 28 by welding 32 so as not to move in the axial direction. On the other hand, other mounting stays 29B
A fixing cylinder 33 having an inner diameter larger than the outer diameter of the linear member 28 is fixed to an end of the linear member 28. By fitting the mounting cylinder 33 to the linear member 28, the mounting stay 29B is attached to the linear member. On the other hand, it is connected so as to be axially movable and rotatable with play.

Accordingly, the fixing of the linear member 28 in the axial direction is performed by the mounting stay 29A which supports one end thereof, but the other mounting stay 29B is axially movable and rotatable with respect to the linear member 28. Therefore, the linear member 28 can be attached to the claw bracket 23 having a different axial position and a different protruding direction. Further, since the other mounting stay 29B is connected to the linear member 28 with play, the member 28 is appropriately supported even if the linear member 28 is slightly inclined with respect to the axial direction of the tilling shaft 8. it can.

The retaining portion of the tilling claw 20 is not limited to the above-mentioned reinforcing rib 31. By forming notches 34 on both sides (or one side) of the base end as shown in FIG. Can also be configured. As means for connecting the mounting stay 29A supporting one end of the linear member 28 so as to be immovable in the axial direction, the means shown in FIG.

FIG. 5A shows the mounting stay 2
9A is a bent portion 35 formed at one end of the linear member 28 and rotatably connected to the linear member 28 via a mounting cylinder 33.
And the beta pin 36 provided in the radial direction of the linear member 28 makes the mounting stay 29A axially immovable. Further, in FIG. 5B, the bent portion 3 shown in FIG.
Instead of 5, a retaining portion 37 formed by flatly forging one end of the linear member 28 is employed.

FIGS. 6 and 7 show a second embodiment of the present invention. This embodiment is similar to the first embodiment in that the linear member 28 is formed of a straight steel bar, but of the three mounting stays 29 supporting the linear member 28, both ends of the linear member 28 are provided. The second embodiment differs from the first embodiment in that an attachment stay 29C for supporting the portion is connected to the linear member 28 so as not to move in the axial direction and to be swingable.

That is, as shown in FIGS. 6 (a) and 6 (b), in this embodiment, the linear member 28 is inserted into the mounting hole 38 formed at the end of the mounting stay 29C which supports both ends of the linear member 28. The mounting stay 29C is connected to the linear member 28 so as to be non-axially movable and swingable by inserting a bent portion 39 formed by bending both ends of the mounting member 29. The attachment stay 29C is prevented from coming off by the bent portion 3
9 to form a stepped portion 40 by folding back the tip of FIG.
(A)), by inserting the beta pin 41 into the tip of the bent portion 39 (FIG. 6 (b)).

A mounting stay 29D for supporting the intermediate portion of the linear member 28 is connected to the linear member through the mounting cylinder 42 so as to be freely movable in the axial direction and rotatable with play. The mounting cylinder 42 in this case is mounted so that the linear member 28 can be mounted obliquely with respect to the tilling shaft 8 as shown in FIG.
Is considerably shorter than the stay width. Thus, in this embodiment, the mounting stays 29 at both ends of the linear member 28 are provided.
Since C is swingable, for example, as shown in FIG.
The linear member 28 can be appropriately attached to the cultivating shaft 8 even when is considerably inclined with respect to the axial center direction of the cultivating shaft 8.

A mounting stay 29C that cannot be moved in the axial direction and is swingable is provided only at one end of the linear member 28, and a rotatable mounting stay 29D is provided at the other end and the intermediate portion of the linear member 28. Can also be adopted. Next, FIGS.
Shows a third embodiment of the present invention. In this embodiment, the linear member 28 is made of a wire rope slightly shorter than the tilling shaft 8, and the mounting stays 29 are provided only at both ends of the linear member 28 in the case of the first and second embodiments. And different.

That is, as shown in FIG. 8, the mounting stay 29E of this embodiment has an upright wall 43 at one end in the width direction, and the upright wall 43 has bolts fixed to both ends of a linear member (wire rope) 28. 44 is inserted and the bolt 44
A nut 45 for fastening the standing wall portion 43 from the front and back surfaces is screwed. Accordingly, by changing the screwing position of the nut 45, the mounting position of the mounting stay 29E in the axial direction of the linear member 28 can be adjusted.

Further, as shown in FIG.
Numeral 3 is inclined toward the pocket 20A side of the tilling claw 20, and a bolt insertion hole 46 is provided in a portion corresponding to the pocket 20A. In order to attach the linear member 28 of this embodiment to the tilling shaft 8, a suitable radially outwardly directed claw bracket 23 located at both ends of the tilling shaft 8 is selected.
Then, the mounting stay 29E may be fixed in the same procedure as in the first embodiment. In this case, the tension of the linear member 28 is adjusted by hooking a middle part of the linear member 28 to another tilling claw 20 at an intermediate portion in the axial direction of the tilling shaft 8 as shown in FIG.

In this case, as long as the middle portion of the linear member 28 does not hit the tooth portion 20B of the tilling claw 20, as shown in FIG.
As shown in FIG. 10A, the linear member 28 may be hung on the front side in the rotation direction. However, in order to prevent the linear member 28 from being excessively pressed against the tilling claw 20 during tilling, tilling as shown in FIG. It is preferable that the hook 20 is hooked on the rear side in the rotation direction of the claw 20 (the side of the pocket 20A).

In each of the above embodiments, two or more linear members 28 can be provided for one tilling shaft 8. In addition, the present invention is not limited to the above embodiments, and can be applied to, for example, a center drive type rotary tilling apparatus.

[0033]

As described above, according to the present invention ,
Without a moment acting on the intake with the stay 29 will affect the bolts 24 that attach the tilling claws 20, Ru can prevent rattling and falling off of the tilling claws 20. In addition , the linear member 2
Since the arm length of the mounting stay 29 does not need to be very long even when the mounting member 8 is considerably separated from the cultivating shaft 8, the linear member 28 is separated from the cultivating shaft 8 without causing a decrease in the supporting force of the mounting stay 29. Can be attached.

According to the second aspect of the present invention, since the arbitrary mounting stay 29B is connected to the linear member 28 so as to be axially movable and rotatable with play, the axial position and the protruding direction are provided. The linear member 28 can be attached to the claw bracket 23 having a different shape. According to the third aspect of the present invention, since the mounting stay 29C at the end of the linear member 28 is swingable, the linear member 28 is mounted on the tilling shaft 8 due to the projecting position of the claw bracket 23. The linear member 28 can be appropriately attached to the tilling shaft 8 even when the line member 28 is considerably inclined with respect to the axial center direction.

[Brief description of the drawings]

FIG. 1A is a perspective view illustrating a winding prevention mechanism of a rotary tillage device according to a first embodiment, and FIG. 1B is an enlarged cross-sectional view of a mounting portion of a tillage claw.

FIG. 2 is a rear view of the rotary tillage device.

FIG. 3 is a side view of the rotary plow.

FIG. 4 is a perspective view showing a modified example of a retaining portion of a tilling claw.

FIG. 5 is a perspective view showing a modification of a mounting stay provided at one end of a linear member.

FIG. 6A is a perspective view showing a winding prevention mechanism of a rotary tillage device according to a second embodiment, and FIGS. 6B and 6C are perspective views showing an attachment stay provided at an end of a linear member. is there.

FIG. 7 is a plan view showing a state where the linear member is attached to a tilling shaft.

8A is a perspective view showing a winding prevention mechanism of a rotary tillage device according to a third embodiment, FIG. 8B is a side view thereof, and FIG. 8C is a front view showing a mounting state of a mounting stay. is there.

FIG. 9 is a plan view showing a state where the linear member is attached to the tilling shaft.

FIG. 10 is a side view showing a state in which a linear member is hooked on a tilling claw.

[Explanation of symbols]

 Reference Signs List 1 rotary tillage device 8 tillage shaft 20 tillage claw 23 claw bracket 23A fitting concave portion 24 bolt 28 linear member 29 mounting stay 30 insertion hole 31 retaining part (reinforcing rib) 34 retaining part (notch part)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor, Shunji Fujimoto 64, Ishizukita-cho, Sakai City, Osaka Inside the Kubota Sakai Plant (72) Inventor Kazumi Umeki 64, Ishizukita-cho, Sakai-shi, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. (56) References JP-A-5-153801 (JP, A) JP-A-6-11403 (JP, U) JP-A-4-74906 (JP, U) (58) Fields investigated (Int. ⁶ , DB name) A01B 33/08

Claims (5)

(57) [Claims] 1. A plurality of claw brackets (23) each having a fitting recess (23A) at a tip thereof are provided on an outer peripheral surface of a tilling shaft (8) rotatably supported around an axis. The base end of the tilling claw (20) projecting outward in the radial direction and fitted into the fitting recess (23A) is fastened to the claw bracket (23) with a bolt (24). Either one of the linear members (2) along the axial direction of the tilling shaft (8).
8) A winding prevention mechanism for a rotary tilling device to which mounting stays (29) for supporting the tilling shaft (8) apart from the tilling shaft (8) are respectively fixed, wherein the base end of the tilling claw (20) can be inserted. Hole (3
0) is provided on the mounting stay (29), and the mounting stay (29) abutted on the tip of the claw bracket (23) so that the insertion hole (30) corresponds to the fitting recess (23A). ) Is prevented by the retaining portions (31) and (34) formed on the tilling claw (20) that passes through the insertion hole (30) and fits into the fitting concave portion (23A), so that the claw bracket is secured. (23) A winding prevention mechanism for a rotary tilling device, which is fixed to a tip of (23). 2. A plurality of mounting stays (29) supporting the linear member (28), one of the mounting stays (29A) is connected to the linear member (28) so as to be immovable in the axial direction, The other mounting stay (29B) is connected to the linear member (2).
The winding prevention mechanism for a rotary tilling device according to claim 1, wherein the mechanism is rotatably connected to the axially movable and rotatable with play with respect to (8). 3. A plurality of mounting stays (29) for supporting the linear member (28), the mounting stay (29C) for supporting an end of the linear member (28) is provided on the linear member (28).
3. A winding prevention mechanism for a rotary tillage device according to claim 2, wherein the mechanism is non-axially movable and swingably connected to the rotary tilling device. (4) Rotates to the lower part of the rotary transmission case (6)
The tilling shaft (8) provided freely and the tilling shaft (8)
A number of claw brackets (23) projecting from the outer peripheral surface
Tilling claw (2) attached to each claw bracket (23)
0) and the above Away from the cultivation axis (8) and in the axial direction
A linear member (28) arranged along the linear member;
Timber (28) and base of the tillage claw (20)
Mounting stay having an insertion hole (30) through which the end can be inserted
(29) The tilling nail (20) has its base end inserted into the insertion hole (3).
0) The mounting stay (29) does not come off when inserted through
That the retaining portions (31) and (34)
Rotary tillage device with anti-wrap mechanism. (5) Rotates to the lower part of the rotary transmission case (6)
The tilling shaft (8) provided freely and the tilling shaft (8)
A number of claw brackets (23) projecting from the outer peripheral surface
Tilling claw (2) attached to each claw bracket (23)
0) and apart from the tilling shaft (8) and in the axial direction
A linear member (28) arranged along the linear member;
Timber (28) and base of the tillage claw (20)
Mounting stay having an insertion hole (30) through which the end can be inserted
(29) The mounting stay (29) has a base end in its insertion hole (30).
Part is retained by the tilling claw (20)
Rotary tilling with anti-winding mechanism
apparatus.