JP2018130083A - Rotary tilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent tilling performance from being degraded that is caused by a rotary tilling device swinging in the roll direction.SOLUTION: A rotary tilling device includes multiple tilling claws 25 and a tilling claw shaft 24. Multiple claw mounting parts 24C with the tilling claws 25 mounted thereto are included dispersedly in the peripheral surface of the tilling claw shaft 24. The multiple claw mounting parts 24C are included in the peripheral surface of the tilling claw shaft 24 by the arrangement having a phase difference in the circumferential direction of the tilling claw shaft 24 and spacing in the axial direction of the tilling claw shaft 24. Left and right claw mounting parts 24Cb arranged in the symmetrical position of both left and right end sides in the tilling claw shaft 24 among the multiple claw mounting parts 24C are arranged in the same phase in the circumferential direction of the tilling claw shaft 24.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rotary tiller that includes a plurality of tilling claws and a tilling pawl shaft, and a plurality of pawl attachment portions to which the tilling claws are attached are distributed on a peripheral surface of the tilling pawl shaft.

  In the rotary tiller as described above, a plurality of claw mounting portions (holders) are arranged in phase with the peripheral surface of the tilling claw shaft so that a plurality of tilling claws are not driven into the field at the time of tilling work. It has been considered to disperse and attach in different states (see, for example, Patent Document 1).

JP 2002-125405 A (paragraph numbers 0013 to 0015, FIG. 3)

  In the rotary plowing device described in Patent Literature 1, the plurality of tilling claws are not driven into the field scene at the same time, thereby reducing the driving reaction force compared to the case where the plurality of tilling claws are simultaneously driven into the field scene. Can do. Thereby, the vertical vibration of the rotary tiller due to the driving reaction force can be suppressed, and the deterioration of the tillage performance due to the vertical vibration can be suppressed.

  On the other hand, in the rotary tiller described in Patent Document 1, the rotary tiller is always swung in the roll direction by the driving reaction force when the plurality of tilling claws are always driven alone into the field scene in a predetermined order. It will be. As a result, the swinging of the rotary tiller in the roll direction is promoted, leading to a decrease in tillage performance due to the swinging in the roll direction.

  That is, it is desired to suppress a decrease in tillage performance caused by the rotary tiller swinging in the roll direction.

As means for solving the above problems, a rotary tiller according to the present invention is:
It has a plurality of tilling claws and a tilling claw shaft,
A plurality of claw attachment portions to which the tilling claw is attached are distributed and provided on the circumferential surface of the tilling claw shaft,
The plurality of claw mounting portions have a phase difference in the circumferential direction of the tilling claw shaft and are provided on the circumferential surface in an arrangement spaced in the axial direction of the tilling claw shaft,
Among the plurality of claw mounting portions, left and right claw mounting portions arranged at left and right symmetrical positions on the left and right ends of the tilling claw shaft are arranged in the same phase in the circumferential direction of the tilling claw shaft.

  According to this means, the left and right tilling claws attached to the left and right nail attachment portions in the same phase are arranged in the same phase at left and right symmetrical positions on the left and right ends of the tilling claw shaft. With this arrangement, the left and right tilling claws in the same phase become synchronous tilling claws that are simultaneously applied to the field scene during the tilling operation. Thereby, the rocking | fluctuation to the roll direction of a rotary tiller is suppressed periodically.

  As a result, it is possible to suppress the swinging of the rotary tiller in the roll direction during the tilling work, and it is possible to suppress a decrease in tillage performance due to the swinging of the rotary tiller in the roll direction.

As one of the means for making the present invention more suitable,
A plurality of sets of the left and right claw attachment portions having the same phase are provided in the circumferential direction of the tilling claw shaft.

  According to this means, every time the tilling pawl shaft makes one rotation in the tilling operation, a plurality of sets of synchronous tilling claws are driven into the field scene at intervals once in a predetermined order. That is, the swinging of the rotary tiller in the roll direction can be suppressed at shorter intervals.

  As a result, it is possible to more effectively suppress the swinging of the rotary tiller in the roll direction during tillage work, and more reliably suppress the deterioration of tillage performance caused by the swinging of the rotary tiller in the roll direction. can do.

As one of the means for making the present invention more suitable,
A plurality of sets of the left and right nail attachment portions are arranged with a constant or substantially constant phase difference in the circumferential direction of the tilling nail shaft.

  According to this means, every time the tillage claw shaft makes one rotation in the tillage work, a plurality of sets of synchronous tillage claws are driven into the field scene at regular intervals or substantially constant intervals once in a predetermined order. In other words, the swinging of the rotary tiller in the roll direction can be suppressed at short periodic intervals.

  As a result, it is possible to effectively and stably suppress the swinging of the rotary tiller in the roll direction during tillage work, and to reliably reduce the tillage performance caused by the swinging of the rotary tiller in the roll direction. It can be stably suppressed.

It is a left view of the rotary tiller connected with the rear part of a tractor. It is a cross-sectional top view of the rotary tiller which developed arrangement | positioning of a nail | claw attaching part and a tilling nail | claw. It is a perspective view of a tilling nail shaft. It is an expanded view which shows arrangement | positioning of the some nail | claw attaching part and the cultivation nail | claw in the surrounding surface of a cultivation nail | claw axis | shaft. It is an expanded view which shows arrangement | positioning of the some nail | claw attaching part and the tilling nail in the surrounding surface of the tilling nail | claw axis | shaft in another embodiment.

Hereinafter, as an example of a mode for carrying out the present invention, an embodiment in which the present invention is applied to a side drive type rotary tiller will be described with reference to the drawings.
The direction indicated by the arrow F shown in FIG. 1 is the front side of the rotary tiller, and the direction indicated by the arrow U is the upper side of the rotary tiller.
2 is the front side of the rotary tiller, and the direction indicated by the arrow R is the right side of the rotary tiller.

  As shown in FIGS. 1 and 2, the rotary tiller 1 is connected to the rear portion of the tractor 2 through a three-point link mechanism 3 so as to be movable up and down. The rotary tiller 1 is driven by the power extracted from the PTO shaft 4 of the tractor 2 being transmitted via the external transmission mechanism 5.

  The rotary tilling device 1 includes a tilling frame 10 connected to the link mechanism 3, a tilling rotor 11 that rotates around a horizontal axis, a transmission unit 12 that transmits power from the tractor to the tilling rotor 11, and an upper portion of the tilling rotor 11. A fixed upper cover 13 for covering, a vertically swinging rear cover 14 for covering the rear portion of the tilling rotor 11, a left and right side cover 15 for covering both left and right sides of the tilling rotor 11, and the like are provided.

  The tilling frame 10 includes a first member 16 connected to the link mechanism 3, a second member 17 having the first member 16 attached to the left and right central portions, and left and right extending downward from both left and right ends of the second member 17. The third member 18 is provided. The second member 17 and the left third member 18 are also used as a transmission case that covers the transmission unit 12. The left and right third members 18 include bearing portions 18A that support the tilling rotor 11 so as to be rotatable.

  The transmission unit 12 includes an input shaft 19 to which power from the PTO shaft 4 is transmitted via the external transmission mechanism 5, a bevel gear 20 that meshes with the bevel gear portion 19 </ b> A of the input shaft 19, a transmission shaft 21 that rotates integrally with the bevel gear 20, And the chain type transmission mechanism 22 transmitted to the tilling rotor 11 from the transmission shaft 21 is provided.

  As shown in FIGS. 1 to 3, the tilling rotor 11 includes left and right support shafts 23 supported by the bearing portions 18 </ b> A of the left and right third members 18, a tilling claw shaft 24 extending across the support shaft 23 to the left and right, and a tilling claw shaft 24. A plurality of tilling claws 25 attached to the peripheral surface 24A are provided. The left and right support shafts 23 are connected to flange portions 24 </ b> B provided at both left and right ends of the tilling claw shaft 24. The left support shaft 23 also serves as an input shaft through which power from the PTO shaft 4 is transmitted via the external transmission mechanism 5 and the transmission unit 12. The plurality of tilling claws 25 are attached to a plurality of claw attachment portions 24 </ b> C provided dispersed on the peripheral surface 24 </ b> A of the tilling claw shaft 24. The plurality of tilling claws 25 include an outward-facing tilling claw 25A in which the tip end side of the tilling claw 25 is positioned on the left and right outer sides of the tilling rotor 11 with respect to the base end side, and the tip end side of the tilling claw 25 is closer to the tilling rotor 11 than the base end side. There is an inward tillage claw 25B located on the left and right center side.

  As shown in FIGS. 2 to 4, the plurality of claw attachment portions 24 </ b> C have a phase difference in the circumferential direction of the tilling claw shaft 24 and are arranged at intervals in the axial direction of the tilling claw shaft 24. The peripheral surface 24A is provided.

  The arrangement of the claw attachment portions 24C will be described in detail. The plurality of claw attachment portions 24C are arranged in 27 rows at intervals in the axial direction of the tilling claw shaft 24. Then, the plurality of claw attachment portions 24C are based on the 14th row claw attachment portions 24C arranged at the left and right centers of the tilling claw shaft 24, and the 14th and 14th rows (for example, the 13th row and the 14th row). The left and right claw mounting portions 24C of the 15th row, the 12th row and the 16th row, etc. are arranged at left and right symmetrical positions where the distance from the claw mounting portion 24C of the 14th row is the same.

  In addition, among the plurality of claw mounting portions 24 </ b> C, each claw mounting portion 24 </ b> Ca located in the fourth to 24th rows on the left and right center side of the tilling claw shaft 24 has a phase difference in the circumferential direction of the tilling claw shaft 24. They are arranged in different phases. On the other hand, the claw mounting portions 24Cb located in the first to third rows and the 25th to 27th rows on the left and right ends of the tilling claw shaft 24 are in the first row that is the left-right symmetrical position of the tilling claw shaft 24. The left and right claw attaching portions 24Cb located in the 27th row are arranged in the same phase in the circumferential direction of the tilling claw shaft 24. Further, the left and right claw mounting portions 24Cb located in the second and 26th rows, which are symmetrical positions of the tilling claw shaft 24, are arranged in the circumferential direction of the tilling claw shaft 24 in the same phase. The left and right claw mounting portions 24 </ b> Cb located in the third and 25th rows that are the left and right symmetrical positions of the tilling claw shaft 24 are arranged in the same direction in the circumferential direction of the tilling claw shaft 24.

  A first claw mounting portion 24C1 and a second claw mounting portion 24C2 having a phase difference of about 180 degrees in the circumferential direction of the tilling claw shaft 24 are provided at the positions of the first and 27th rows of the tilling claw shaft 24. ing. The first claw mounting portion 24C1 in the first row and the first claw mounting portion 24C1 in the 27th row are arranged in the same phase, and the second claw mounting portion 24C2 in the first row and the second claw mounting in the 27th row. The part 24C2 is arranged in the same phase. Then, the claw mounting portions 24Cb and 25th row of the third row arranged in the same phase with respect to the claw mounting portions 24Cb and 24th row of the 26th row arranged in the same phase. The claw mounting portion 24 </ b> Cb is disposed so as to have a phase difference of about 180 degrees in the circumferential direction of the tilling claw shaft 24. In addition to this, the claw mounting portions 24Cb and 3 in the second row and the 26th row with respect to the first claw mounting portions 24C1 and the second claw mounting portions 24C2 in the first row and the 27th row, respectively. The claw attaching portions 24Cb in the rows and the 25th row are arranged so as to have a phase difference of about 90 degrees in the circumferential direction of the tilling claw shaft 24.

  In other words, the plurality of claw attachment portions 24 </ b> C are arranged with the claw attachment portions 24 </ b> Ca positioned on the left and right center sides of the tilling claw shaft 24 being arranged in different phases in the circumferential direction of the cultivation claw shaft 24. The left and right nail attachment portions 24Cb positioned at the left and right symmetrical positions on the left and right ends of the plow are arranged in the same phase in the circumferential direction of the tilling claw shaft 24. The four sets of left and right nail attachment portions 24 </ b> Cb arranged in the same phase are arranged so as to have a substantially constant phase difference in the circumferential direction of the tilling claw shaft 24.

With the above arrangement, each of the tilling claws 25 attached to the claw attaching portions 24Ca having different phases is arranged with a different phase on the left and right center sides of the tilling claw shaft 24. With this arrangement, the tilling claws 25 are arranged in a predetermined order during the tilling work. Asynchronous tillage nail A is driven alone in the field.
On the other hand, the left and right tilling claws 25 attached to the left and right nail attachment portions 24Cb in the same phase are arranged in the same phase at left and right symmetrical positions on the left and right sides of the tilling claw shaft 24, and this arrangement allows the farm scene to be It becomes synchronous tillage claw B to be beaten at the same time. And this synchronous tilling nail | claw B is provided with 4 sets by the arrangement | positioning which has a substantially constant phase difference in the circumferential direction of the tilling nail | claw axis | shaft 24, so that every time the tilling nail | claw axis | shaft 24 carries out 1 rotation in tilling work, The synchronous tillage claw B is driven into the farm scene once in a predetermined order with a substantially constant interval.

  That is, in the tilling work, the four sets of synchronous tilling claws B arranged in the same phase at the left and right side symmetrical positions on the tilling pawl shaft 24 are always at regular intervals while the tilling pawl shaft 24 rotates once. It will be hit at the same time in the farm scene. Further, during the substantially constant interval when the simultaneous tilling claws B are not simultaneously driven, any of the asynchronous tilling claws A arranged in different phases on the left and right center sides of the tilling claws shaft 24 are arranged in a predetermined order. It will be driven into the surface alone.

  Thereby, in the cultivation work, even if the rotary tiller 1 swings in the roll direction by the driving reaction force when each asynchronous tillage nail A is driven alone in the field scene, the synchronous tillage nail B remains at a substantially constant interval. By hitting simultaneously, the swinging of the rotary tiller 1 in the roll direction is suppressed at a substantially constant period.

  As a result, compared to a case where all the tilling claws 25 are asynchronous tilling claws A, it is possible to suppress a decrease in tilling performance due to the rotary tiller 1 swinging in the roll direction.

  By the way, the left and right nail attachment portions 24C arranged at the left and right symmetrical positions of the tilling claw shaft 24 are outwardly cultivated so that the front ends of the left and right tilling claws 25 are inwardly facing each other or facing each other. A claw 25A or an inward tillage claw 25B is attached.

4 is the axial direction of the tilling claw shaft 24, and the up and down direction in FIG. 4 is the circumferential direction of the tilling claw shaft 24. 27 vertical lines in FIG. 4 indicate the arrangement positions of the claw mounting portions 24C on the tilling claw shaft 24, the leftmost vertical line is the first column, and the rightmost vertical line is the 27th column. Each hatching location in FIG. 4 shows the arrangement of the claw attachment portions 24C to which the outward tilling claws 25A and the outward tilling claws 25A are attached. Each black-painted location in FIG. 4 shows the arrangement of the claw attachment portions 24C to which the inward tilling claws 25B and the inward tilling claws 25B are attached.
Incidentally, in FIG. 4, in the two black-painted portions in the leftmost grid, the inward tilling claws 25 </ b> B are attached to the two claw attaching portions 24 </ b> C located in the first row of the tilling claw shaft 24. (See FIG. 2).
In FIG. 4, the blacked portion in the second square row from the left end indicates that the inward tilling claw 25 </ b> B is attached to one claw attaching portion 24 </ b> C located in the second row of the tilling claw shaft 24. (See FIG. 2).
In FIG. 4, the hatched portion in the second square row from the left end indicates that the outward tilling claw 25 </ b> A is attached to one claw attaching portion 24 </ b> C located in the third row of the tilling claw shaft 24. (See FIG. 2).

[Another embodiment]
The present invention is not limited to the configuration exemplified in the above-described embodiment, and typical other embodiments relating to the present invention will be exemplified below.

[1] The present invention may be applied to a center drive type rotary tiller.

[2] The number and arrangement of the claw attachment portions 24 </ b> C (cultivation claw 25) provided on the tilling claw shaft 24 can be variously changed according to the working width of the rotary tilling device 1.
For example, in the tilling claw shaft 24, a plurality of claw mounting portions 24 </ b> C (cultivation claw 25) may be arranged in 28 rows or more or 26 rows or less at intervals in the axial center direction of the cultivation claw shaft 24.
For example, among the plurality of claw attachment portions 24C (cultivation claw 25), each claw attachment portion 24Ca (cultivation claw 25) located in the third to 25th rows on the left and right center side of the cultivation claw shaft 24 is a cultivation claw shaft. 24 in the claw mounting portions 24Cb (cultivation claws 25) that are arranged in different phases in the circumferential direction and located in the first and second rows and the 26th to 27th rows on the left and right ends of the tillage claw shaft 24. Are the left and right claw attachment portions 24Cb (cultivation claw 25) located in the first and 27th rows, which are symmetrical positions of the tillage claw shaft 24, and the left and right claw attachments located in the second and 26th rows. The portion 24 </ b> Cb (cultivation claw 25) may be arranged in the same phase in the circumferential direction of the cultivation claw shaft 24.
For example, among the plurality of claw attachment portions 24C (cultivation claw 25), each claw attachment portion 24Ca (cultivation claw 25) located in the fourth to 24th rows on the left and right center side of the cultivation claw shaft 24 is a cultivation claw shaft. 24 in the claw mounting portions 24Cb (cultivation claws 25) located in the first to third rows and the 25th to 27th rows, which are arranged at different phases in the circumferential direction of the tillage claw shaft 24. Are the left and right claws located in the second and 26th rows, except for the left and right claw mounting portions 24Cb (cultivation claws 25) located in the first and 27th rows, which are symmetrical positions of the tillage claw shaft 24. The mounting portion 24Cb (cultivation claw 25) and the left and right claw mounting portions 24Cb (cultivation claw 25) located in the third and 25th rows are arranged in the same direction in the circumferential direction of the cultivation claw shaft 24. May be.
For example, as shown in FIG. 5, not only the left and right nail attachment portions 24Cb (left and right tilling claws 25) arranged at the left and right symmetrical positions on the left and right ends of the tilling claw shaft 24, but also the left and right center sides of the tilling claw shaft 24 The left and right claw attachment portions 24Ca (left and right tilling claws 25) arranged at symmetrical positions may also be arranged in the same phase in the circumferential direction of the tilling claw shaft 24.
For example, the arrangement interval of the plurality of claw attachment portions 24C (cultivation claw 25) in the axial direction of the tilling claw shaft 24 and the phase difference of the plurality of claw attachment portions 24C (cultivation claw 25) in the circumferential direction of the cultivation claw shaft 24. Can be changed according to the size or quantity of the tilling claws 25 provided on the tilling claw shaft 24.

[3] The number of sets of the left and right claw mounting portions 24Cb (left and right cultivating claws 25 serving as the synchronous cultivating claw B) arranged in the same phase at the left and right symmetrical positions on the left and right sides of the tilling claw shaft 24 is determined by the rotary tiller 1 Various changes can be made according to the working width of the machine.
For example, the number of sets of the left and right claw mounting portions 24Cb (the left and right tilling claws 25 serving as the synchronized tilling claws B) disposed in the same phase at the left and right symmetrical positions on the left and right ends of the tilling claw shaft 24 is three or less. It may be 5 sets or more.
And when there are a plurality of sets of left and right claw mounting portions 24Cb (left and right cultivating claws 25 serving as synchronous tillage claws B) arranged in the same phase at the left and right symmetrical positions on the left and right ends of the tillage claw shaft 24, A plurality of sets of left and right nail attachment portions 24Cb having the same phase (left and right tilling claws 25 serving as the synchronous tilling claws B) have different phase differences in the circumferential direction of the tilling claw shaft 24 and have a circumferential surface 24A. The left and right claw mounting portions 24Cb (the left and right tilling claws 25 to be the synchronized tilling claws B) are fixed or substantially constant in the circumferential direction of the tilling claw shaft 24. It is preferable that the circumferential surface 24A of the tilling claw shaft 24 is provided in an arrangement having a phase difference.

[4] Various changes can be made to the configuration of the plurality of claw mounting portions 24C provided on the tilling claw shaft 24.
For example, the tilling claw shaft 24 is provided with a plurality of flange portions for attaching the tilling claw in an arrangement spaced in the axial direction of the tilling claw shaft 24, and each flange portion has a plurality of sets of two sets. The mounting holes are formed so as to have a phase difference in the circumferential direction of the tilling claw shaft 24, so that a plurality of sets of mounting holes formed in each flange portion function as a plurality of claw mounting portions 24C. May be.

  The present invention can be applied to a rotary tiller such as a side drive type or a center drive type.

24 Claw Claw Shaft 24A Peripheral Surface 24C Claw Attachment 24Cb Claw Attachment (Left and Right Claw Attachment)
25 Tillage Claw

Claims (3)

It has a plurality of tilling claws and a tilling claw shaft,
A plurality of claw attachment portions to which the tilling claw is attached are distributed and provided on the circumferential surface of the tilling claw shaft,
The plurality of claw mounting portions have a phase difference in the circumferential direction of the tilling claw shaft and are provided on the circumferential surface in an arrangement spaced in the axial direction of the tilling claw shaft,
Of the plurality of claw attaching portions, a rotary tilling device in which left and right claw attaching portions arranged at left and right symmetrical positions on the left and right ends of the tilling claw shaft are arranged in the same phase in the circumferential direction of the tilling claw shaft. .   2. The rotary tiller according to claim 1, wherein a plurality of sets of the left and right claw attachment portions having the same phase are provided in a circumferential direction of the tillage claw shaft.   The rotary tiller according to claim 2, wherein a plurality of sets of left and right claw mounting portions are arranged with a constant or substantially constant phase difference in a circumferential direction of the tilling claw shaft.

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