JP3604003B2 - Rotary tillage device with grass roll prevention member - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary tilling device with a grass winding prevention member for preventing grass from winding around a tilling shaft when cultivating soil with a tilling claw.
[0002]
[Prior art]
When grass is wound around the tillage shaft when cultivating the soil with the rotary tillage device, it takes time and effort to remove the wound grass, thereby reducing workability. For this reason, a rotary tillage device configured to prevent winding of grass has been proposed in, for example, Japanese Utility Model Publication No. 4-32006, “Tilling Wheel Device in Tiller”.
[0003]
According to this technique, a plate is arranged along a cultivation axis and the plate is extended radially outward of the cultivation axis to prevent grass from winding around the cultivation axis with the extended plate.
However, when the tilling shaft is attached to the plate, the soil sticks to the plate during the tilling of the soil, and the weight of the sticking soil increases, which may cause a loss in the engine output.
[0004]
As an example of avoiding a loss of engine output, Japanese Utility Model Registration No. 2569257, entitled "A device for preventing grass wrapping in a tiller" is known.
This technology uses a cantilever support that attaches one end of a rod to the bracket of the tilling shaft. The rod is separated from the tilling shaft by a predetermined distance and is placed along the tilling shaft, and this rod wraps the grass around the tilling shaft. It is to prevent.
However, since the rod is cantilevered, the other end is open, and there is a possibility that grass may enter from the opened other end and wind around the tilling shaft. In addition, since the rod is cantilevered, the rod is easily deformed when a load is applied to the other end of the rod.
[0005]
As an example of avoiding a loss of engine output and preventing winding of grass and deformation of a rod, Japanese Utility Model Laid-Open No. 60-10404 discloses a device for preventing grass from winding on a tilling claw shaft rotor.
In this technology, a plurality of tilling shafts are connected coaxially from the vehicle body center side to the outer side, tilling claws are attached to each tilling shaft via a flange, and both ends of the rod are inserted into each through hole of the adjacent flange. By inserting the rod, the rod is arranged along the tilling axis while being separated from the tilling axis by a predetermined distance, and this rod prevents grass from winding around the tilling axis.
[0006]
[Problems to be solved by the invention]
In this device, since the rod is attached by inserting both ends of the rod into the through holes of each of the adjacent flanges, the through holes into which the rods are inserted need to be coaxially aligned. However, since the flanges are attached to individual tillage shafts, it takes time and effort to assemble these through holes coaxially.
[0007]
Accordingly, an object of the present invention is to provide a rotary tilling apparatus with a grass winding prevention member which avoids loss of engine output, prevents winding and deformation of grass, and is easy to assemble.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 connects an inner cultivation shaft attachment to an output shaft driven by a drive source, connects a central cultivation shaft attachment to an outer side of the inner cultivation shaft attachment, and connects the inside of the inner cultivation shaft attachment. The tilling shaft is provided with a cultivating claw via a flange, the central cultivating shaft attachment is provided with a cultivating claw via a flange on a central cultivating shaft attachment, and provided with a grass winding prevention member for preventing grass from winding around the central cultivating shaft. In a rotary tillage device that turns each tillage shaft with an output shaft and tills with the tillage claws, the grass winding prevention member includes an extension portion disposed at a predetermined interval on the central tillage shaft, and both ends of the extension portion. exhibited substantially U comprising a pair of bent portions bent, welded the ends of the pair of bent portions is welded to the central cultivating shaft, a pair of bent portions, one, to the flange of the central cultivating shaft Contact And the other, in contact or almost tilling claws inner cultivating shaft is obtained by disposed with no gap, that the central cultivating shaft having the grass winding prevention member, mounted removably on the inside cultivating shaft Features.
Further, in claim 2, the grass winding prevention member has an approximately L-shape including an extended portion arranged at a predetermined interval on the central tilling shaft and a bent portion bent at one end of the extended portion. The end of the bent portion is joined to the central cultivation shaft, and the bent portion is arranged in contact with the cultivation claw of the inner cultivation shaft or in a state where there is almost no gap, and the other end of the extension portion is connected to the center cultivation shaft. The central cultivating shaft provided with the grass winding prevention member is detachably attached to the inner cultivating shaft.
[0009]
The grass winding prevention member was formed to have a substantially U shape or a substantially L shape. Thereby, a space is opened between the tilling shaft attachment and the grass winding prevention member. For this reason, when the soil is tilled by turning the tilling shaft attachment, the cultivated soil passes through the space between the tilling shaft attachment and the grass roll prevention member. Therefore, it is possible to prevent the soil from sticking to the tilling shaft attachment.
[0010]
In addition, both ends of the grass winding prevention member were tightly joined to the tillage shaft attachment. For this reason, when cultivating the soil by turning the tilling shaft attachment, it is possible to prevent grass from entering between the grass winding prevention member and the cultivation shaft attachment from both ends of the grass winding prevention member.
In addition, both ends of the grass winding prevention member are both supported by the tillage shaft attachment, thereby preventing deformation of the grass winding prevention member.
[0011]
Claims 1 and 2 are characterized in that the grass winding prevention member is attached to a single tilling shaft attachment.
By attaching the grass winding prevention member to a single cultivation shaft attachment, attachment and detachment of a plurality of cultivation shaft attachments becomes easy, and the attachment and detachment work can be easily performed without trouble.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the accompanying drawings. In addition, "before" and "after" follow the direction seen from the worker. Also, the drawings should be viewed in the direction of reference numerals.
FIG. 1 is a side view of a rotary tillage device (first embodiment) with a grass winding prevention member according to the present invention.
The rotary tillage device 10 with a grass winding prevention member has a drive source (engine) 14 mounted on an upper end of a casing 11, and an output shaft 18 connected to the engine 14 via a power transmission mechanism (shown in FIG. 2). This is a walking type self-propelled cultivator in which a cultivation shaft attachment unit 20 is connected to 18 and a cultivation shaft attachment unit 20 is provided with a grass winding prevention member.
[0013]
The rotary tillage device 10 rotates the output shaft 18 with the engine 14, rotates the tillage shaft attachment unit 20 with the output shaft 18, and operates the handle 45 to operate the tillage claw 26 of the tillage shaft attachment unit 20. Till the soil). At this time, by inserting the resistance rod 46 into the soil, the amount of tilling by the tilling claws 26 is set and the resistance to the traction force of the tilling claws 26 is added.
[0014]
FIG. 2 is a sectional view taken along line 2-2 of FIG.
The power transmission mechanism 15 includes a pinion 16 that rotates by the driving force of the engine 14 (shown in FIG. 1), and a bevel gear 17 that meshes with the pinion 16. The pinion 16 and the bevel gear 17 are arranged inside the casing 11. is there.
The output shaft 18 is a member that meshes with the bevel gear 17 of the power transmission mechanism 15 through serrations 19, and has left and right ends 18 a and 18 b protruding from the casing 11.
[0015]
The cultivation shaft attachment unit 20 includes left and right cultivation shaft attachments (inner cultivation shaft attachments) 21 and 21 connected to the left and right ends 18a and 18b of the output shaft 18, and left and right cultivation shaft attachments 21 and 21 connected to the outside of the respective inner cultivation shaft attachments 21 and 21. Cultivation shaft attachments (intermediate cultivation shaft attachments) 30, 30 and left and right cultivation shaft attachments (outside cultivation shaft attachments) 40, 40 connected to the outside of these intermediate cultivation shaft attachments 30, 30.
Note that the left and right tillage shaft attachments are the same member, and the left attachments 21, 30, and 40 will be described below, and the description of the right attachments 21, 30, and 40 will be omitted.
[0016]
The left inner cultivation shaft attachment 21 has an inner cultivation shaft 22 that can be fitted to the left end 18 a of the output shaft 18, a first flange 23 attached substantially at the center of the inner cultivation shaft 22, and a large size attached to the first flange 23. An outer weed prevention member 24 having a cylindrical shape and four tilling claws 26 attached to the first flange 23 on the opposite side of the outer weed prevention member 24 with bolts and nuts 25.
[0017]
The left inner cultivation shaft attachment 21 fits the inner cultivation shaft 22 into the left end of the output shaft 18, and inserts the first pin 27 into the outer grass wrapping prevention member 24, the inner cultivation shaft 22, and the left end of the output shaft 18. Accordingly, the output shaft 18 is connected to the left end.
The outer grass winding prevention member 24 is a member formed in a large-diameter cylindrical body. By covering the inner cultivating shaft 22 with the large-diameter cylindrical body, grass is prevented from winding around the inner cultivating shaft 22. Further, by extending the outer grass winding prevention member 24 to the casing 11, the cover 12 attached to the casing 11 is covered, and the outer grass winding prevention member 24 is removed from the gap between the outer grass winding prevention member 24 and the cover 12. 24 prevents soil and grass from entering the inside. The seal member 13 is protected by closing the opening of the casing 11 with the cover 12.
[0018]
The left center cultivation shaft attachment 30 has a center cultivation shaft 31 that can be fitted to the left end of the inner cultivation shaft 22, a second flange 32 attached to the left end of the center cultivation shaft 31, and bolts on the outside of the second flange 32. The four tilling claws 26 attached with nuts 25 and the approximately U-shaped grass winding prevention members (upper and lower sides mounted on the center cultivating shaft 31 so that both ends are in close contact with each other) 33 (shown by imaginary lines).
[0019]
The grass winding prevention member 33 is arranged such that the left bent portion 35 contacts the second flange 32 and the right bent portion 36 contacts the tilling claws 26. This prevents grass from entering between the left bent portion 35 and the second flange 32 and between the right bent portion 36 and the tilling claws 26.
The left center cultivation shaft attachment 30 is attached to the left end of the inner cultivation shaft 22 by fitting the center cultivation shaft 31 to the left end of the inner cultivation shaft 22 and inserting the second pin 38 into the center cultivation shaft 31 and the inner cultivation shaft 22. .
[0020]
The left outer cultivation shaft attachment 40 includes an outer cultivation shaft 41 that can be fitted to the left end of the center cultivation shaft 31, and a disk 42 attached to the left end of the outer cultivation shaft 41.
The left outer cultivation shaft attachment 40 is such that the outer cultivation shaft 41 is fitted to the left end of the central cultivation shaft 31, and the third pin 43 is inserted into the outer cultivation shaft 41 and the central cultivation shaft 31, so that the left end of the central cultivation shaft 31. Attach to
Thereby, the inner cultivating shaft 22, the central cultivating shaft 31, and the outer cultivating shaft 41 rotate integrally by rotating the output shaft 18 by the driving force of the engine 14 (shown in FIG. 1).
The left tillage shaft attachment unit 20 will be described in more detail with reference to FIG.
[0021]
FIG. 3 is an exploded view of a main part of a rotary tillage device (first embodiment) with a grass roll prevention member according to the present invention.
The left inner cultivation shaft attachment 21 aligns the through hole 24a of the inner grass wrapping prevention member 24 and the through hole 22a of the inner cultivation shaft 22 with the through hole 18c of the output shaft 18, and fits these through holes 24a, 22a, 18c. The first pin 27 is removably attached to the output shaft 18 by inserting it as shown by an arrow.
[0022]
In addition, the left central cultivation shaft attachment 30 aligns the through hole 31a of the central cultivation shaft 31 with the through hole 22b of the inner cultivation shaft 22, and inserts the second pin 38 into these through holes 31a and 22b as shown by arrows. It is detachably attached to the inner cultivation shaft 22.
The central grass winding prevention member 33 has an approximately U-shape including an extension portion 34 disposed at a predetermined interval on the central tillage shaft 31 and left and right bent portions 35 and 36 bent at the left and right ends of the extension portion 34. The end portions 35a, 36a of the left and right bent portions 35, 36 are welded together so as to be in close contact with the central cultivation shaft 31, and the left bent portion 35 is welded to the second flange 32.
[0023]
The left outer cultivation shaft attachment 40 aligns the through hole 41a of the outer cultivation shaft 41 with the through hole 31b of the central cultivation shaft 31, and inserts the third pin 43 into these through holes 41a and 31b as shown by the arrow. It is detachably attached to the shaft 31.
[0024]
FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, in which a rectangular first flange 23 is mounted on the inner cultivating shaft 22, and four cultivating claws 26 are attached to the first flange 23 by bolts and nuts 25. Shows a state where the outer grass winding prevention member 24 is attached to the first flange 23. The outer grass winding prevention member 24 is formed in a large-diameter cylindrical body to prevent grass from winding.
[0025]
FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 3, in which a rectangular second flange 32 is attached to the central tilling shaft 31, and four tilling claws 26 are attached to the second flange 32 with bolts and nuts 25. The center cultivation shaft 31 is attached above and below the center grass wrapping prevention member 33, and the end 35a of the left bent portion 35 of the center grass wrapping prevention member 33 is tightly joined to the center cultivation shaft 31, and A state in which the left bent portion 35 of the central grass winding prevention member 33 is welded to the second flange 32 is shown.
By attaching the center grass wrapping prevention member 33 above and below the center cultivation shaft 31, grass is prevented from wrapping around the center cultivation shaft 31.
[0026]
Next, the operation of the rotary tillage device 10 with the grass winding prevention member will be described.
FIGS. 6A and 6B are first operation explanatory diagrams of the rotary tillage device with the grass winding prevention member according to the present invention (first embodiment), and FIG. 6A shows Comparative Example 1; b) shows an embodiment.
In (a), the first to third cultivation shafts 100, 101, 102 are connected, and the first and second cultivation shafts 100, 101 are respectively attached with first and second flanges 103, 104, and the first flange is formed. One end 105a of the grass bar winding prevention pipe bar 105 is inserted into the through hole 103a of 103, and the other end 105b of the grass winding prevention pipe bar 105 is inserted into the through hole 104a of the second flange 104. The grass winding prevention pipe bar 105 prevents grass from winding around the tilling shaft.
[0027]
Since the pipe bar 105 is attached by inserting the both ends 105a, 105b of the pipe bar 105 into the through holes 103a, 104a of the first and second flanges 103, 104, the respective through holes 103a, 104a need to be coaxially aligned. However, since the first and second flanges 103 and 104 are attached to the individual tilling shafts 100 and 101, respectively, these through holes 103a and 104a need to be coaxially aligned, and the assembling work is troublesome. .
[0028]
In (b), a substantially U-shaped central grass winding prevention member 33 is attached only to the central tilling shaft 31. For this reason, for example, when the center cultivation shaft 31 is attached to the inner cultivation shaft 22 as shown by the arrow (1), the positioning of the center cultivation shaft 31 with respect to the inner cultivation shaft 22 is performed relatively rough as compared with Comparative Example 1. Can be. Therefore, the assembling work is simplified, and the assembling work does not take much time.
[0029]
FIGS. 7A to 7C are diagrams illustrating a second operation of the rotary tillage device (first embodiment) with the grass winding prevention member according to the present invention, wherein FIG. 7A is a comparative example 2 and FIG. Indicates Comparative Example 3, and (c) indicates an example.
In (a), a plate 111 for preventing grass winding is arranged along the cultivation shaft 110, and the plate 111 is extended outward in the radial direction of the cultivation shaft 110. For this reason, the soil may stick to the plate 111 during the tillage of the soil, the weight of the soil 112 may increase, and the engine output may be lost.
[0030]
In (b), one end of a grass winding prevention rod 117 is attached to a bracket 116 of a tilling shaft 115 so as to be cantilevered. For this reason, the other end 117a side of the grass winding stick prevention rod 117 is in an open state, and there is a possibility that grass may enter from the opened other end 117a side and wind around the tilling shaft 115. In addition, since the grass winding prevention rod 117 is cantilevered, when a load is applied to the other end 117a of the grass winding prevention rod 117, the grass winding prevention rod 117 is easily deformed.
[0031]
In (c), the central grass winding prevention member 33 is formed so as to have a substantially U-shape, and both ends 35a, 36a of the left and right bent portions 35, 36 are attached to the central tilling shaft 31, so that central tillage is performed. A space S can be provided between the shaft 31 and the center winding prevention member 33. For this reason, the soil passes through the space S between the central tilling shaft 31 and the grass winding prevention member 33 during the tilling of the soil. Therefore, it is possible to prevent the soil from sticking to the central tilling shaft 31 and to suppress a loss in engine output.
[0032]
In addition, both ends 35a and 36a of the central grass winding prevention member 33 were tightly joined to the central tilling shaft 31. Therefore, it is possible to prevent grass from entering between the central grass winding prevention member 33 and the central tilling shaft 31 from the ends 35a and 36a of the grass winding prevention member 33 during the plowing of the soil.
In addition, by supporting both ends 35a and 36a of the central grass winding prevention member 33 with the central tilling shaft 31, deformation of the center grass winding prevention member 33 is prevented.
[0033]
FIG. 8 is an enlarged view of a main part of a rotary tillage device (second embodiment) with a grass roll prevention member according to the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The center cultivation shaft attachment 50 on the left side of the second embodiment includes a center cultivation shaft 31 that can be fitted to the left end of the inner cultivation shaft 22 illustrated in FIG. 3, and a second flange 32 attached to the left end of the center cultivation shaft 31. , Four tilling claws 26... Attached with bolts and nuts 25... Outside the second flange 32, and a substantially L-shaped grass roll attached vertically to the central tilling shaft 31 so that both ends are in close contact with each other. And an attachment prevention member 53.
[0034]
The central grass winding prevention member 53 has a substantially L-shape including an extension 54 disposed at a predetermined interval on the center tilling shaft 31 and a bent portion 55 bent at the right end of the extension 54. Is tightly joined to the central tilling shaft 31, and the left end 54 a of the extension 54 is tightly joined to the second flange 32.
[0035]
The second embodiment can achieve the same effects as the first embodiment. That is, since the central grass winding prevention member 53 is attached to the central tilling shaft 31 alone, the assembling work is simplified and the assembling work is not troublesome.
In addition, both ends of the center weed prevention member 53 were tightly joined together, and a space S was provided between the center till shaft 31 and the center weed prevention member 53. For this reason, during the cultivation of the soil, it is prevented that the soil passes through the interval S and sticks to the central cultivation shaft 31, thereby suppressing the loss of the engine output.
[0036]
Furthermore, by tightly joining the both ends of the central grass winding prevention member 53, the center grass winding prevention member 53 and the central tilling shaft 31 are connected from both ends of the central grass winding prevention member 53 during plowing of the soil. To prevent grass from entering the space S between the two.
In addition, by supporting both ends of the central grass winding prevention member 33, the deformation of the center grass winding prevention member 53 is prevented.
[0037]
Note that, in the above-described embodiment, an example has been described in which the walking-type self-propelled cultivator employs the grass winding prevention member. However, the present invention is also applicable to a rear tine rotor in which a rotary device is attached to a rear portion of a tractor and towed. Is also possible.
In addition, the example in which the central grass winding prevention members 33 and 53 are attached to the central cultivating shaft 31 has been described. However, as another example, the central cultivating shaft 22 and the outer cultivating shaft 41 can be attached.
Furthermore, although an example in which members having a substantially U shape or a substantially L shape are used as the central grass winding prevention members 33 and 53 has been described, a large opening may be opened in the center of a rectangular plate as another example.
[0038]
【The invention's effect】
The present invention has the following effects by the above configuration.
Claim 1 forms the grass winding prevention member in a substantially U-shape , and Claim 2 forms the grass winding prevention member in a substantially L-shape . Thus , a space can be provided between the tilling shaft attachment and the grass winding prevention member. For this reason, when the soil is tilled by turning the tilling shaft attachment, the cultivated soil can pass through the space between the tilling shaft attachment and the grass winding prevention member. Therefore, it is possible to prevent the soil from sticking to the tilling shaft attachment, and to suppress a loss in engine output.
[0039]
In addition, both ends of the grass winding prevention member were tightly joined to the tillage shaft attachment. For this reason, when cultivating the soil by turning the tilling shaft attachment, it is possible to prevent grass from entering between the grass winding prevention member and the cultivation shaft attachment from both ends of the grass winding prevention member.
In addition, by supporting both ends of the grass winding prevention member with the tillage shaft attachment, deformation of the grass winding prevention member can be prevented.
[0040]
Furthermore , by attaching the grass winding prevention member to a single tillage shaft attachment, it is possible to easily attach and detach a plurality of tillage shaft attachments. Therefore, the work of attaching and detaching the plurality of tillage shaft attachments can be easily performed without any trouble.
[Brief description of the drawings]
1 is a side view of a rotary tillage device (first embodiment) with a grass roll prevention member according to the present invention; FIG. 2 is a sectional view taken along line 2-2 of FIG. 1; FIG. FIG. 4 is an exploded view of a main part of a rotary tillage device (first embodiment) with an attachment prevention member. FIG. 4 is a sectional view taken along line 4-4 in FIG. 3 FIG. 5 is a sectional view taken along line 5-5 in FIG. FIG. 7 is an explanatory view of a first operation of a rotary tillage device with a grass roll prevention member according to the present invention (first embodiment). FIG. 7 is a rotary tillage device with a grass roll prevention member according to the present invention (first embodiment). FIG. 8 is an enlarged view of a main part of a rotary tillage device (second embodiment) with a grass winding prevention member according to the present invention.
DESCRIPTION OF SYMBOLS 10 ... Rotary tillage device with grass winding prevention member, 14 ... Drive source (engine), 18 ... Output shaft, 20 ... Tillage shaft attachment unit, 21 ... Tillage shaft attachment (inner tillage shaft attachment), 23 ... 1st flange ( Flange), 26: Cultivating claws, 30: Tilling shaft attachment (central tillage shaft attachment), 31: Central tillage shaft, 32: Second flange (flange), 33 , 53: Preventive member with grass winding (prevention with central grass winding) 35) Left bent part, 35a End part of left bent part, 36 ... Right bent part, 36a End part of right bent part, 40 ... Tilling shaft attachment (outside tilling shaft attachment) , 54 ... Extended part, 55 ... Bent part, 55a ... End part of the bent part .

Claims (2)

An output shaft driven by the driving source, and connecting the inner cultivating shaft attachment, connecting the central cultivating shaft attachment on the outside of the inner cultivating shaft attachment, comprising a tilling claw via a flange to the inside cultivating shaft of the inner cultivating shaft attachment, The center tilling shaft of the center cultivating shaft attachment is provided with a cultivating claw via a flange, a grass winding prevention member for preventing grass from being wound around the center cultivating shaft, and the cultivation is performed by turning each cultivating shaft with an output shaft. In a rotary tiller that plows with claws ,
The grass winding prevention member,
And extension portions arranged at predetermined intervals in the central cultivating shaft, a substantially U comprising a pair of bent portions bent at both ends of the extension presents,
Weld the ends of the pair of bent parts to the central tillage shaft,
Of the pair of bent parts, one is welded to the flange of the central cultivation shaft and is in contact, and the other is arranged in a state where the cultivation claw of the inner cultivation shaft is in contact with or has almost no gap,
A rotary tilling device with a grass winding prevention member, wherein the central cultivation shaft having the grass winding prevention member is detachably attached to the inner cultivation shaft . The output shaft driven by the drive source is connected to the inner cultivation shaft attachment, the center cultivation shaft attachment is connected to the outside of the inner cultivation shaft attachment, and the inner cultivation shaft attachment has a cultivating claw via a flange on the inner cultivation shaft attachment. The center tilling shaft of the center cultivating shaft attachment is provided with a cultivating claw via a flange, a grass winding prevention member for preventing grass from being wound around the center cultivating shaft, and the cultivation is performed by turning each cultivating shaft with an output shaft. In a rotary tiller that plows with claws,
The grass winding prevention member,
An extended portion arranged at a predetermined interval on the central tilling axis and a substantially L-shaped bent portion bent at one end of the extended portion,
The end of this bent part is joined to the central cultivation shaft, and the bent part is arranged in a state in which there is little or no contact with the cultivation claw of the inner cultivation shaft,
The other end of the extension is joined to the flange of the central tillage shaft,
The central tilling shaft with grass winding prevention member, detachably, wherein the grass winding prevention member with the rotary tiller you that is attached to the inner cultivating shaft.

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