JP4861359B2 - Leveling member for rotary tiller - Google Patents

Description

  The present invention relates to a leveling member used in a rotary tiller provided in a walking type working machine or a riding type agricultural tractor.

For example, when a rotary working device is provided with a rotary tiller, as disclosed in Patent Documents 1 and 2, the upper cover of the rotary tiller (6 of FIG. 1 of Patent Document 1) (FIG. 1 of Patent Document 1). 20) may be connected to a laterally long leveling member (21 in FIGS. 1 and 2 of Patent Document 1) in a front view.
Thereby, the soil cultivated by the rotary tiller is received by the leveling member, and a leveling surface is formed by the lower side portion of the leveling member (leveling operation).

As described above, against the leveling work that forms the soil cultivated by the rotary cultivator in a flat shape, the soil cultivated by the rotary cultivator is pushed to the right and left side, and the rotary cultivator There is a erection work to form a ridge on the right and left lateral sides of the frame. When performing the uprighting work, remove the leveling member such as Patent Documents 1 and 2 from the rotary tiller, and the leveling member as disclosed in Patent Document 3 (14 in FIG. 2 of Patent Document 3), Connect to the rear of the rotary tiller.
As a result, the soil cultivated by the rotary tiller is pushed to the right and left lateral sides by the leveling member, so that the right and left lateral sides are laid (the right and left lateral wall portions, Is formed).

JP-A-6-153604 JP-A-6-153602 JP 2003-52202 A

For example, in a walking type working machine equipped with a rotary tiller, when performing leveling work and erecting work as described above, it is necessary to connect or remove two kinds of leveling members to the rotary tiller. There is room for improvement in terms of sex.
An object of the present invention is to configure a leveling member used in a rotary tiller provided in a walking-type work machine or a riding-type agricultural tractor so that leveling work and uprighting work can be appropriately performed.

[I]
(Constitution)
The first feature of the present invention is that the leveling member for a rotary tiller is configured as follows.
An upper side portion that is configured in a flat plate shape with flexibility in a horizontally long shape and is connected to the rear end portion of the upper cover of the rotary tiller along the horizontal direction, and a lower side portion that is located on the opposite side of the upper side portion. And a central portion in the lateral direction of the lower side portion is configured to be freely connectable and detachable to the fixing portion provided in the rotary tiller so as to be positioned below the rear end portion of the upper cover.

(Function)
According to the first feature of the present invention, when leveling work is performed, the upper side of the leveling member is connected to the rear end of the upper cover of the rotary tiller, and the lower side of the leveling member from the fixed part of the rotary tiller. Remove.
As a result, the lower side of the leveling member hangs down from the rear end of the upper cover of the rotary tiller, so that the soil cultivated by the rotary tiller is received by the leveling member, and the entire leveling member is rearward. It is in a state of moving upward (upward), and a flat surface is formed by the lower side of the leveling member.

According to the first feature of the present invention, when the uprighting work is performed, in the state in which the upper side portion of the leveling member is connected to the rear end portion of the upper cover of the rotary tiller, the lateral central portion of the lower side portion of the leveling member is Connect to the fixed part of the rotary tiller.
As a result, when the soil cultivated by the rotary tiller is received by the leveling member, the central part (lower side part) of the leveling member does not move backward (the central part in the horizontal direction of the lower side part of the leveling member is rotary. One and the other lateral side of the leveling member will move backward, so that one and the other lateral side of the leveling member bend diagonally backward. (For example, see FIG. 8). In this state, the bottom portion of the heel is formed by the center portion (lower side portion) of the leveling member, and the right and left side walls of the heel are formed by the bent one side and the other side portion of the leveling member.

(The invention's effect)
According to the first feature of the present invention, the leveling member for one rotary cultivator can perform leveling work and tapping work, and the rotary cultivating apparatus has two kinds of leveling according to the leveling work and the tapping work. It is not necessary to connect or remove the members, and the operability and workability can be improved.

[II]
(Constitution)
The second feature of the present invention is that the leveling member for a rotary tiller of the first feature of the present invention is configured as follows.
A metal middle member is fixed to a central portion in the lateral direction of the lower side portion, and a horizontal member separated from the middle member is fixed to one side and the other side of the lower side portion.

(Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
According to the second feature of the present invention, in leveling work, as described in [I] above, when the soil cultivated by the rotary tiller is received by the leveling member, the leveling by the one and the other lateral members is performed. The leveling surface is stably formed by the lower side portion of the leveling member because the lower side portion of the member is difficult to deform unnecessarily.

According to the second feature of the present invention, when the soil cultivated by the rotary tiller is received by the leveling member as described in the preceding item [I] in the uprighting work, 1 and the other lateral side of the leveling member bend diagonally backward starting from the middle and between the middle member and the other horizontal member (one side and the other side of the leveling member) Since the position where the portion is bent obliquely backward does not vary, the right and left side wall portions are stably formed by one and the other side portions of the leveling member.
When the bottom part of the ridge is formed by the center part (lower side part) of the leveling member, the center part (lower side part) of the leveling member is difficult to unnecessarily deform the center part (lower side part) of the leveling member by the middle member. As a result, the bottom of the ridge is stably formed.

(The invention's effect)
According to the second feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the second feature of the present invention, the leveling surface is stably formed in the leveling operation, and the right and left side wall portions and the bottom of the rod are stably formed in the uprighting operation. As a result, the work performance could be improved.

[III]
(Constitution)
The third feature of the present invention is that the leveling member for a rotary tiller of the second feature of the present invention is configured as follows.
The middle member protrudes outward from the lower side, and one and the other lateral members protrude outward from the lower side.

(Function)
According to the third feature of the present invention, as in the second feature of the present invention, the “action” described in the preceding paragraphs [I] and [II] is provided. In addition, the following “action” is provided. Yes.
As described in the preceding item [I], when the leveling member is configured to be a flat plate having flexibility and horizontally long (for example, when the leveling member is formed of a rubber plate), the lower side of the leveling member that is always in contact with the soil There is concern about wear of the parts.
According to the third feature of the present invention, the middle member protrudes outward from the lower side of the leveling member, and one and the other lateral members protrude outward from the lower side of the leveling member. The lower member of the leveling member is protected from the soil by the horizontal member, and wear of the lower side of the leveling member is suppressed.

(The invention's effect)
According to the third feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] and [II] is provided in the same manner as the second feature of the present invention. In addition, the following “effect of the invention” is provided. Is provided.
According to the third feature of the present invention, the lower member of the leveling member is protected from the soil by the middle member, the one and the other lateral members, and the wear of the lower side of the leveling member is suppressed. It was possible to improve the durability.

[IV]
(Constitution)
The fourth feature of the present invention resides in the following structure in the leveling member for the rotary tiller of the second or third feature of the present invention.
A connecting member is provided that can connect and release the middle member and one and the other lateral members.

(Function)
According to the fourth feature of the present invention, the “action” described in the preceding paragraph [I] [II] [III] is provided in the same manner as the second or third feature of the present invention. It has “action”.
According to the fourth aspect of the present invention, in the leveling operation, the middle member and the one and the other lateral member are connected to each other by the coupling member so that the middle member and the one and the other lateral member become one member. To.
As a result, when the soil cultivated by the rotary tiller is received by the leveling member, the lower side portion of the leveling member is further deformed by the middle member and one and the other lateral members as described in [II] above. The leveling surface is stably formed by the lower side of the leveling member.

  According to the fourth aspect of the present invention, in the uprighting work, the middle member and the one and the other lateral member are separated from each other by releasing the connection between the middle member and the one and the other transverse member. Therefore, the state described in the previous item [II] [III] can be obtained, and the uprighting work can be performed without any trouble.

(The invention's effect)
According to the fourth feature of the present invention, the “effect of the invention” described in the preceding item [I] [II] [III] is provided as in the second or third feature of the present invention. The “effect of the invention” is provided.
According to the fourth feature of the present invention, the leveling surface is stably formed in leveling work, and the work performance can be improved.

  As shown in FIGS. 1 and 2, axles 2 are provided at the lower right and left sides of the mission case 1, and traveling wheels 3 are connected to the right and left axles 2. The engine 5 is supported by the support frame 4 connected to the front part, and a walking work machine is configured. A transmission case 6 extends obliquely rearward and downward from the upper part of the transmission case 1, and a steering handle 7 extends obliquely rearward and upward from the transmission case 8. The transmission case 6 is provided with a rotary tiller 8. .

Next, the rotary tiller 8 will be described.
As shown in FIGS. 1 and 2, a drive shaft 9 extends from the lower part of the transmission case 6 to the right and left sides, and a plurality of tilling claws 10 are fixed to the right and left drive shafts 9. A rotary tiller 8 is configured by including an upper cover 11 covering the upper portion of 10, a resistance rod 12, and the like. The right and left drive shafts 9 and the tilling claws 10 are normally rotationally driven in the forward rotation direction (the direction of arrow A1 in FIG. 3), and are also rotationally driven in the reverse rotation direction (the direction of arrow A2 in FIG. 3). Is possible.

Next, the upper cover 11 will be described.
As shown in FIGS. 3 and 4, the upper cover 11 is configured by connecting a fan-shaped lateral wall portion 11 b to the right and left sides of the semicylindrical ceiling portion 11 a, and the upper and right sides of the transmission case 6. The upper cover 11 (ceiling part 11a) is connected to the bracket 6a of the transmission case 6 so as to cover the left drive shaft 9 and the tilling claw 10.

Next, the resistance rod 12 will be described.
As shown in FIGS. 3 and 4, the bracket 13 fixed to the transmission case 6 extends rearward, the narrow square pipe-shaped bracket 14 is fixed to the bracket 13, and the bracket 14 is attached to the upper cover 11 ( It protrudes upward from the opening of the ceiling part 11a). A support member 15 bent in a U-shape is fixed to the upper part of the bracket 14, and an L-shaped fixing pin 16 is supported by the support member 15 so as to be slidable (right and left in FIG. 4) and to be rotatable. A spring 17 is provided to urge the fixing pin 16 from the opening (not shown) of the bracket 14 to the insertion side (right side of the paper in FIG. 4).

  As shown in FIGS. 3 and 4, the resistance bar 12 is formed in an elongated flat bar shape, and a flat plate-shaped grounding portion 12 a (corresponding to a fixing portion of the rotary tiller 8) is fixed to the lower portion of the resistance bar 12. A plurality of fixing holes 12b are extended along the longitudinal direction at the upper portion of the resistance rod 12. The state shown in FIGS. 3 and 4 is a state in which the resistance bar 12 is inserted into the bracket 14 and the fixing pin 16 is inserted into one of the fixing holes 12 b of the resistance bar 12. It is in a fixed state. In this state, the resistance rod 12 is positioned directly behind the transmission case 6, and the grounding portion 12a of the resistance rod 12 is positioned below the central portion in the left-right direction at the rear end of the upper cover 11 (ceiling portion 11a). ing.

  In the state shown in FIGS. 3 and 4, the right and left drive shafts 9 and the tilling claws 10 are moved forward in the normal rotation direction (the direction of the arrow A1 in FIG. 3), thereby cultivating the field (plowing). ) Is performed. When the grounding portion 12a of the resistance bar 12 contacts the field, the height of the rotary tiller 8 relative to the field is determined, and the tilling depth of the rotary tiller 8 is determined.

  As shown in FIGS. 3 and 4, the fixing pin 16 is pulled out to the left in FIG. 4, rotated about 90 degrees, and hung on the bent portion 15 a of the support member 15, so that the fixing pin 16 is pulled out. Can be held in. When the fixing pin 16 is pulled out, the position of the resistance rod 12 is changed along the bracket 14, and the fixing pin 16 is inserted into another fixing hole 12 b of the resistance rod 12, whereby the resistance rod 12 ( The height of the grounding part 12a) can be changed, whereby the tilling depth of the rotary tiller 8 can be changed.

Next, the leveling member 18 will be described.
As shown in FIGS. 2, 3, and 4, the leveling member 18 is formed in a flat plate shape by a flexible rubber plate and is formed in a horizontally long shape (rectangular shape) (see FIG. 4). The upper side portion 18a of the leveling member 18 is set to have substantially the same length (width) as the rear end portion 11c of the upper cover 11 (ceiling portion 11a), and the rear end portion 11c of the upper cover 11 (ceiling portion 11a) An upper side portion 18a of the leveling member 18 is placed along the upper surface (rear surface), and a fixing member 19 having a length (width) substantially the same as the upper side portion 18a of the leveling member 18 (a metal elongated flat bar) Is placed. At a plurality of positions of the fixing member 19, the bolt 20 is tightened through the rear end portion 11 c of the upper cover 11 (ceiling portion 11 a), the upper side portion 18 a of the leveling member 18, and the fixing member 19. 20, the upper side portion 18a of the leveling member 18 is coupled to the rear end portion 11c of the upper cover 11 (ceiling portion 11a) along the lateral direction.

  As shown in FIGS. 3, 4, and 5, the middle member 21, one and the other transverse member 22 are provided, and the middle member 21, the one and the other transverse member 22 are formed in a horizontally long sawtooth shape by a metal plate material. It is configured, and is configured to be bent in a “<” shape in a side view (see FIG. 3). The middle member 21 is fixed to the resistance rod 12 side portion at the lateral center portion of the lower side portion 18b of the leveling member 18 by a bolt 23, so that the middle member is higher than the lateral center portion of the lower side portion 18b of the leveling member 18. 21 protrudes outward, and a connecting pin 24 is fixed to a central portion in the lateral direction of the middle member 21.

  As shown in FIGS. 4 and 5, one and the other lateral members 22 are fixed to the resistance rod 12 side portion at one and the other lateral sides of the lower side portion 18 b of the leveling member 18 by bolts 23, and the leveling member One and the other lateral member 22 protrude outward from one and the other lateral side portions of the lower side portion 18b of 18. A slit-like gap is formed between the middle member 21 and one lateral member 22, and a slit-like gap is formed between the middle member 21 and the other transverse member 22 (see FIG. 4). .

  As shown in FIGS. 4 and 5, the intermediate member 21 is provided with a bent (folded) receiving portion 21 a on one and the other lateral outer side of the bolt 23, and the receiving portion 21 a serves as the leveling member 18. It is located on the opposite side of the resistance bar 12 in the lower side 18b. In one and the other side member 22, a connecting member 25 is swingably supported by a bolt 23 on the side opposite to the resistance bar 12 in the lower side portion 18 b of the leveling member 18.

Next, leveling work will be described.
As shown in FIGS. 4, 5, and 6, when performing leveling work, the bolt 23 is slightly loosened, the connecting member 25 is inserted into the receiving portion 21 a of the intermediate member 21, the bolt 23 is tightened again, and the connecting member 25 is Fix it. As a result, the middle member 21, the one and the other lateral members 22 are connected to each other, and the middle member 21 and the one and the other lateral members 22 become one member. The connecting pin 24 is not connected to the grounding part 12a of the resistance bar 12, but is removed from the grounding part 12a of the resistance bar 12.

  In this state, as shown in FIGS. 4, 5, and 6, from the rear end portion 11 c of the upper cover 11 (ceiling portion 11 a), the lower side portion 18 b (the middle member 21, one and the other lateral members 22) of the leveling member 18. As a result, the lower side portion 18b of the leveling member 18 (the middle member 21, one and the other lateral member 22) is linear, and the entire leveling member 18 moves rearward (upward). .

As shown in FIG. 6, the rotary tiller 8 rotates the right and left drive shafts 9 and tilling claws 10 in the normal rotation direction (the direction of the arrow A <b> 1 in FIG. 3) as the airframe advances. The cultivated soil is received by the leveling member 18, and the entire leveling member 18 moves to the rear (upward), and the lower side portion 18b (the middle member 21, one side and the other side of the leveling member 18) A flat surface is formed by the member 22).
In this case, as shown in FIGS. 4 and 5, the connecting member 25 is extracted from the receiving portion 21 a of the middle member 21 and separated, the bolt 23 is tightened again, and the connecting member 25 is fixed. As described above, the leveling operation may be performed in such a manner that the horizontal members 22 are disconnected from each other.

Next, the setting work will be described.
As shown in FIGS. 7 and 8, when the uprighting work is performed, the bolt 23 is slightly loosened, the connecting member 25 is pulled out from the receiving portion 21a of the intermediate member 21, the bolt 23 is tightened again, and the connecting member 25 is removed. Fix it. As a result, the intermediate member 21 and the one and other lateral members 22 are disconnected from each other. The middle member 21 is moved to the resistance rod 12 side so that the center portion (lower side portion 18b) of the leveling member 18 is rounded to the resistance rod 12 side, and an opening (not shown) of the grounding portion 12a of the resistance rod 12 is provided. The connecting pin 24 is inserted from above, the retaining pin 26 is attached to the connecting pin 24, and the middle member 21 is connected to the grounding portion 12 a of the resistance rod 12.

  In this state, as shown in FIGS. 7 and 8, as the aircraft advances, the right and left drive shafts 9 and the tilling claws 10 are rotated in the forward direction (the direction of arrow A <b> 1 in FIG. 7). When the cultivated soil is received by the leveling member 18, the central portion (lower side portion 18 b) of the leveling member 18 does not move backward (the middle member 21 is the grounding portion 12 a of the resistance bar 12. 1) and the other lateral side portion of the leveling member will move backward.

  As a result, as shown in FIG. 4, the vicinity of the alternate long and short dash line B <b> 1 in the leveling member 18 starts from between the middle member 21 and the one side member 22 and between the middle member 21 and the other side member 22. As a fold line, as shown in FIG. 8, one and the other side portions of the leveling member 18 are bent obliquely backward. In this state, the bottom portion C1 of the flange C is formed by the center portion (lower side portion 18b) of the leveling member 18 and the middle member 21, and the one and other lateral side portions (one and the other lateral member 22) of the leveling member 18 are bent. ) To form the wall portion C2 of the right and left lateral ridges C.

  In this case, since the middle member 21 is connected to the grounding portion 12a of the resistance rod 12, the bottom C1 of the heel C is stably formed in a flat shape, and the right and left lateral heel C A portion between the wall portion C2 and the bottom portion C1 of the ridge C is also clearly formed in a corner shape. A state in which one and the other lateral members 22 of the leveling member 18 are bent obliquely backward so that the one and the other lateral members 22 are in contact with the wall portion C2 of the right and left lateral ribs C. Therefore, the wall portion C2 of the side wall C2 on the right and left sides is stably formed.

[First Alternative Embodiment of the Invention]
3 and 7 of the above-mentioned [Best Mode for Carrying Out the Invention], the upper cover 11 (ceiling) to the bracket 6a of the transmission case 6 along the circumferential direction of the upper cover 11 (ceiling portion 11a). By changing the connecting position of the portion 11 a), the posture may be changed so that the upper cover 11 is rotated about the drive shaft 9. If comprised in this way, the position of the rear-end part 11c of the upper cover 11 (ceiling part 11a) can be changed up and down, and the position of the leveling member 18 can also be changed up and down in connection with this.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment], the middle member 21, one and the other lateral member 22 are eliminated, and the center portion (lower side portion 18b) of the leveling member 18 is eliminated. ) May be directly connected to and removed from the grounding portion 12a of the resistance rod 12.
The present invention eliminates not only the walking-type work machine having the traveling wheel 2 and the rotary tiller separately but also the traveling wheel 2 in FIGS. 1 and 2, and the right and left axles 2 are plowed. The present invention can also be applied to a walking type work machine in which the claws 10 are connected to constitute the rotary tiller 8 or a rotary tiller 8 equipped on a riding type agricultural tractor.

Overall side view of walking type work machine Overall plan view of walking type work machine Longitudinal side view of rotary tiller and leveling member (leveling work) Rear view of rotary tiller and leveling member (leveling work) Perspective view of the leveling member, the middle member, and the vicinity of one and the other transverse member Perspective view of rotary tiller and leveling member (leveling work) Longitudinal side view of rotary tiller and leveling member (raising work) Rear view of rotary tillage device and leveling member (raising work)

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 Rotary tiller 11 Upper cover of rotary tiller 11c Rear end part of upper cover of rotary tiller 12a Fixed part of rotary tiller 18a Upper side of leveling member 18b Lower side of leveling member 21 Medium member 22 Horizontal member 25 Connecting member

Claims (4)

It is composed of a flat plate with flexibility and a horizontally long shape.
An upper side connected along the lateral direction to the rear end of the upper cover of the rotary tiller; and
A lower side located on the opposite side of the upper side,
A ground leveling device for a rotary tiller in which a lateral central part of the lower side part is connected to and detached from a fixing part provided in the rotary tiller so as to be located below the rear end of the upper cover. Element.   The metal middle member is fixed to the center part of the horizontal direction of the said lower side part, The horizontal member isolate | separated from the said middle member is being fixed to one and the other side of the lower side part. Leveling member for rotary tiller.   The leveling member for a rotary tiller according to claim 2, wherein the middle member protrudes outward from the lower side portion, and the one and the other lateral members protrude outward from the lower side portion.   The leveling member for a rotary tilling device according to claim 2 or 3, further comprising a connecting member capable of connecting and releasing the middle member and one and the other lateral members.

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