JP2005269980A - Straw/grass winding prevention structure for rotary tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a straw/grass winding prevention structure for a rotary tiller causing no straw/grass winding, during tilling activity, to a labyrinth structure furnished with covers on a rotary tilling tine shaft-driving shaft and a chain case side bearing boss. <P>SOLUTION: The rotary tiller is provided, having such a construction that a tilling section is constructed by attaching a tilling tine 3 to a rotary tilling tine shaft 5 and there is a rotary cover covering above the tilling section, wherein the rotary cover has a side plate 56 covering the side of the tilling section. This rotary tiller also includes a straw/grass winding prevention fitment 51 that is fixed in the vicinity of the outer diameter of a drive flange 20 situated at the end of the rotary tilling tine shaft 5, extends to the vicinity of the side plate 56 and rotates together with the rotation of the tilling tine shaft 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for preventing weed winding in a rotary cultivator mounted on a tractor.

  Conventionally, a rotary cultivator is attached to the rear part of a tractor or cultivator to perform the cultivating work. This rotary cultivator performs cultivating by rotating a rotary cultivating claw shaft to which a plurality of cultivating claws are attached. The plurality of tilling claws are fixed with holders radially at regular intervals on the tilling claw shaft (see Patent Document 1).

This rotary tilling claw shaft is pivotally supported via a bearing between the lower portion of the chain case and the lower portion of the side frame. Conventionally, a labyrinth structure has been formed by providing a cover on each of the shaft for driving the rotary tilling claw shaft and the bearing boss portion on the chain case side.
JP 2004-41027 A

  However, the above configuration has a problem in that it is difficult to remove the grass because the grass is wound around the outer peripheral portion of the cover during the tilling operation and then tightened tightly. Further, the wound grass has entered the labyrinth and breaks the oil seal.

  Accordingly, the present invention has been made to solve the above-described problems, and has a labyrinth structure in which a cover is provided on each of the shaft for driving the rotary tilling pawl shaft and the bearing boss portion on the chain case side during the tilling operation. An object of the present invention is to provide a structure for preventing winding of grass in a rotary cultivator in which grass does not wind.

  In order to achieve the above object, the invention according to claim 1 of the present invention includes a rotary cover that covers a top of the tillage portion by forming a tillage portion by attaching a tillage nail to the rotary tillage shaft, and the rotary cover. Is a rotary cultivator having a side plate covering the side of the tillage part, and is fixed near the outer diameter of the drive flange located at the end of the rotary tillage claw shaft, and extends to the vicinity of the side plate of the rotary cover. There is provided a weed winding prevention structure in a rotary tiller characterized by comprising a weed winding prevention metal fitting that rotates with the rotation of a tilling claw shaft.

  According to the above-described configuration, the weed winding prevention metal fitting also rotates with the rotation of the tillage claw shaft, so that winding of the weed can be prevented.

  The invention according to claim 2 is characterized in that the weed winding prevention metal fitting is attached by a fastener for fastening the drive flange and the shaft side flange on the drive claw shaft side. Provided is a structure for preventing the weed winding in a rotary cultivator.

  According to the above configuration, the weed winding prevention metal fitting also rotates with the rotation of the tillage claw shaft.

  Therefore, winding of cocoon grass can be prevented.

  Furthermore, it is possible to prevent the winding of grass other than cocoon grass.

  The invention according to claim 3 is the rotary according to claim 1, wherein the anti-wound-winding-preventing metal fitting is fixed to the head of a fastener that fixes the tilling claw to the tilling claw shaft. Provided is a structure for preventing winding of grass in a cultivator.

  According to the above configuration, the weed winding prevention metal fitting also rotates with the rotation of the tillage claw shaft.

  Therefore, winding of cocoon grass can be prevented.

  Furthermore, it is possible to prevent the winding of grass other than cocoon grass.

  The invention according to claim 4 is characterized in that the weed winding prevention metal fitting has an annular shape surrounding the outer periphery of the drive flange, and the weed winding prevention in the rotary tiller according to claim 1 Provide structure.

  According to the above configuration, the weed winding prevention metal fitting also rotates with the rotation of the tillage claw shaft.

  Therefore, winding of cocoon grass can be prevented.

  The invention according to claim 5 is the vicinity of the outer peripheral surface of the ring-shaped anti-wound-preventing metal fitting, and is attached to the outer peripheral surface of the anti-weather-winding-preventing metal fitting inside the side wall of the rotary cover. The scraper winding prevention structure in the rotary cultivator according to claim 4, wherein a scraper for flipping off the attached matter is provided.

  According to the above configuration, the weed winding prevention metal fitting also rotates with the rotation of the tillage claw shaft.

  Therefore, winding of cocoon grass can be prevented.

  During the tilling work of the rotary tiller, it is possible to prevent the grass from being wound around the labyrinth structure in which a cover is provided on each of the shaft for driving the rotary tilling claw shaft and the bearing boss portion on the chain case side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the overall structure of a rotary tiller 19 having a weed winding prevention structure 100 according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a partial cross-sectional view of a rotary tiller having a weed winding prevention structure according to a first embodiment of the present invention.

  The rotary tiller 19 mounted on the rear part of the tractor is driven by the rotary tiller claw shaft 5 by the power from the PTO shaft (power extraction shaft) of the tractor while being pulled by the tractor. In FIG. 1, reference numeral 6 denotes an input shaft to which power from a PTO shaft (power take-off shaft) is transmitted, and is provided at an intermediate position of the bevel gear box 18.

  A chain case 11 having a chain transmission mechanism including an input sprocket 13, a chain 14, an output sprocket 15, and the like is attached to one end of the bevel gear box 18 by fastening a bolt 9, and a side plate is attached to the other end of the bevel gear box 18. 12 is attached by fastening the bolt 10.

  The input sprocket 13 is fixed to the transmission shaft 8 that conducts the gear output of the bevel gear 7, and the output sprocket 15 is fixed to the output sprocket shaft 16. The output sprocket shaft 16 is rotatably supported by a bearing 17, and a drive side flange 20 is fixed inside through an appropriate member.

  On the other hand, a bearing 24 is fixed to the side plate 12 by fastening a bolt 25, and a support-side flange 23 is provided at an end of a shaft member 27 that is rotatably supported by the bearing 24. Corresponding to the drive side flange 20 and the support side flange 23, shaft side flanges 21 and 22 are provided at both ends of the rotary drive claw shaft 5. The shaft side flanges 21 and 22 are respectively bolted to the drive side flange 20 and the support side flange 23, and the rotary drive claw shaft 5 is attached between the drive side flange 20 and the support side flange 23. A plurality of holders 2 project radially from the rotary tilling claw shaft 5 at a predetermined pitch, and the tilling claws 3 are fixed to the holders 2 by mounting bolts 4.

  As shown in FIG. 2, the output sprocket shaft 16 is connected to the drive side flange 20 through the oil seal 55 together with the bearing 17. However, so as to prevent the grass from entering the bearing 17 and the oil seal 55. A case side cover 53, a flange side cover 54, and a case end cover 57 are provided.

  Next, details of the weed winding preventing structure in the rotary tiller according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a partial cross-sectional view of the weed winding preventing structure in the rotary tiller according to the first embodiment of the present invention, and FIG. 3 is the weed winding in the rotary tiller according to the first embodiment of the present invention. The A arrow directional view in FIG. 2 of a prevention structure is shown.

  The weed winding prevention metal fitting 51 of the weed winding prevention structure 100 in this embodiment is fixedly attached by fastening bolts 52 which are fasteners for fastening the drive side flange 20 and the shaft side flange 21. As shown in FIG. 2, the anti-wound winding metal fitting 51 has a substantially right-angle cross section and extends to a position just before the position of the side wall 56 of the rotary cover. Therefore, the weed winding preventing metal fitting 51 rotates with the rotation of the drive flange 21 without hitting the chain case 11 or the side wall 56 of the rotary cover.

  As shown in FIG. 3, the weed winding preventive metal fitting 51 is fastened by fastening bolts 52, 52 at both ends of the fan-shaped spread metal fitting 51.

  Next, the operation of the weed winding preventing structure 100 in the rotary tiller having the above configuration will be described with reference to FIGS.

  When the plowing work is started, the weed winding preventing metal fitting 51 is fastened to the drive flange 20 and thus rotates together with the drive claw shaft 5. Therefore, conventionally, the case side cover 53, the flange side cover 54, and the case end cover 57 have been wound around the case side cover. In addition, it is possible to prevent the grass end from being wrapped around the case end cover 57. In other words, the weed winding prevention metal fitting 51 acts as a rotating body having a larger diameter than the case side cover 53, the flange side cover 54, and the case end cover 57, so Can be prevented. Moreover, it will also fly away the grass, and the winding of the oil seal 55 around the case side cover 53 and the flange side cover 54 can be prevented.

  Next, details of the weed winding preventing structure in the rotary tiller according to the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a partial cross-sectional view of the weed winding preventing structure in the rotary tiller according to the second embodiment of the present invention, and FIG. 5 is the weed winding in the rotary tiller according to the second embodiment of the present invention. The arrow B view in FIG. 4 of a prevention structure is shown.

  The weed winding prevention metal fitting 51 of the weed winding prevention structure 100 in this embodiment is attached by a tilling claw mounting bolt 4 which is a fastener for attaching the tilling claw 3 to the holder 2. As shown in FIG. 4, the anti-wound winding metal fitting 51 has a substantially rectangular cross section and extends to a position just before the position of the side wall 56 of the rotary cover. Therefore, the weed winding preventing metal fitting 51 rotates with the rotation of the drive flange 21 without hitting the chain case 11 or the side wall 56 of the rotary cover.

  As shown in FIG. 5, the weed winding prevention metal fitting 51 is fastened by a tillage claw mounting bolt 4 which is a fastener at the center thereof.

  Next, the operation of the weed winding preventing structure 100 in the rotary tiller having the above-described configuration will be described with reference to FIGS. 3 and 4.

  The tillage work starts, and the hook winding prevention metal fitting 51 is fastened to the tillage claw mounting holder 2 and thus rotates together with the drive claw shaft 5. Therefore, conventionally, the case side cover 53, the flange side cover 54, and the case end cover 57 have been wound around the case side cover. In addition, it is possible to prevent the grass end from being wrapped around the case end cover 57. In other words, the weed winding prevention metal fitting 51 acts as a rotating body having a larger diameter than the case side cover 53, the flange side cover 54, and the case end cover 57, so Can be prevented. Moreover, it will also fly away the grass, and the winding of the oil seal 55 around the case side cover 53 and the flange side cover 54 can be prevented. Moreover, since the mud adhering to the case side cover 53 and the flange side cover 54 of the oil seal 55 can be scraped off, intrusion of the mud into these covers can also be prevented.

  Next, details of the weed winding preventing structure in the rotary tiller according to the third embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a partial cross-sectional view of the weed winding preventing structure in the rotary tiller according to the third embodiment of the present invention, and FIG. 7 is the weed winding in the rotary tiller according to the third embodiment of the present invention. The C arrow line view in FIG. 6 of a prevention structure is shown.

  The weed winding prevention metal fitting 51 of the weed winding prevention structure 100 in this embodiment is fixed to the head of the tilling claw mounting bolt 4 which is a fastener for attaching the tilling claw 3 to the holder 2. As shown in FIG. 6, the anti-wound winding metal fitting 51 has a substantially right-angle cross section and extends to a position just before the position of the side wall 56 of the rotary cover. Therefore, the weed winding preventing metal fitting 51 rotates with the rotation of the drive flange 21 without hitting the chain case 11 or the side wall 56 of the rotary cover.

  As shown in FIG. 7, the weed winding prevention metal fitting 51 is fixed to the head of the tillage claw mounting bolt 4 which is a fastener at the lower center portion.

  Next, the operation of the weed winding preventing structure 100 in the rotary tiller having the above configuration will be described with reference to FIGS. 6 and 7.

  When the tilling work is started, the hook winding prevention metal fitting 51 is fixed to the head of the tillage claw attachment bolt 4 of the tillage claw attachment holder 2 and thus rotates together with the drive claw shaft 5. Therefore, conventionally, the case side cover 53, the flange side cover 54, and the case end cover 57 have been wound around the case side cover. In addition, it is possible to prevent the grass end from being wrapped around the case end cover 57. In other words, the weed winding prevention metal fitting 51 acts as a rotating body having a larger diameter than the case side cover 53, the flange side cover 54, and the case end cover 57, so Can be prevented. Moreover, it will also fly away the grass, and the winding of the oil seal 55 around the case side cover 53 and the flange side cover 54 can be prevented.

  Next, details of the weed winding preventing structure in the rotary tiller according to the fourth embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a partial cross-sectional view of the weed winding preventing structure in the rotary tiller according to the fourth embodiment of the present invention, and FIG. 9 is the weed winding in the rotary tiller according to the fourth embodiment of the present invention. The D arrow line view in FIG. 8 of a prevention structure is shown.

  The weed winding prevention metal fitting 51 of the weed winding prevention structure 100 in this embodiment is fixed to the outer peripheral portions of the drive flange 20 and the shaft side flange 21. As shown in FIGS. 8 and 9, the anti-wound winding metal fitting 51 has a round bar shape and extends just before the position of the side wall 56 of the rotary cover. Therefore, the weed winding preventing metal fitting 51 rotates with the rotation of the drive flange 21 without hitting the chain case 11 or the side wall 56 of the rotary cover.

  As shown in FIG. 9, the weed winding preventive fitting 51 is located on the outer peripheral portion of the drive flange 20 and the shaft side flange 21.

  Next, the operation of the weed winding preventing structure 100 in the rotary tiller having the above-described configuration will be described with reference to FIGS.

  When the plowing work is started, the hook winding prevention metal fitting 51 is fixed to the outer peripheral portions of the drive flange 20 and the shaft side flange 21, and thus rotates together with the drive claw shaft 5. Therefore, conventionally, the case side cover 53, the flange side cover 54, and the case end cover 57 have been wound around the case side cover. In addition, it is possible to prevent the grass end from being wrapped around the case end cover 57. In other words, the weed winding prevention metal fitting 51 acts as a rotating body having a larger diameter than the case side cover 53, the flange side cover 54, and the case end cover 57, so Can be prevented. Moreover, it will also fly away the grass, and the winding of the oil seal 55 around the case side cover 53 and the flange side cover 54 can be prevented.

  Next, details of the weed winding preventing structure in the rotary tiller according to the fifth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a partial cross-sectional view of the weed winding preventing structure in the rotary tiller according to the fifth embodiment of the present invention, and FIG. 11 is the weed winding in the rotary tiller according to the fifth embodiment of the present invention. The E arrow line view in FIG. 10 of a prevention structure is shown.

  The weed winding prevention metal fitting 51 of the weed winding prevention structure 100 in this embodiment has an annular shape so as to surround the drive flange 20, the shaft side flange 21, the case side cover 53 and the flange side cover 54. . As shown in FIGS. 10 and 11, the anti-wound winding metal fitting 51 has a round annular shape and extends to a position just before the position of the side wall 56 of the rotary cover. Therefore, the weed winding preventing metal fitting 51 rotates with the rotation of the drive flange 21 without hitting the chain case 11 or the side wall 56 of the rotary cover.

  As shown in FIG. 10, a scraper 60 for flipping away the grass is attached to the side wall 56 of the rotary cover. As shown in FIG. 11, the scraper 60 has a trapezoidal shape and is attached by bolts 61 inside.

  Next, the operation of the weed winding preventing structure 100 in the rotary tiller having the above-described configuration will be described with reference to FIGS. 10 and 11.

  When the plowing work is started, the hook winding prevention metal fitting 51 is fixed to the outer peripheral portions of the drive flange 20 and the shaft side flange 21, and thus rotates together with the drive claw shaft 5. Therefore, conventionally, the case side cover 53, the flange side cover 54, and the case end cover 57 have been wound around the case side cover. In addition, it is possible to prevent the grass end from being wrapped around the case end cover 57. That is, since the weed winding prevention metal fitting 51 surrounds the case side cover 53, the flange side cover 54 and the case end cover 57, it is possible to prevent the weed winding. Moreover, it will also fly away the grass, and the winding of the oil seal 55 around the case side cover 53 and the flange side cover 54 can be prevented.

  Furthermore, the scraper 60 can scrape off deposits such as cocoon grass and mud that have adhered to the outer peripheral portion of the ring-shaped crow winding prevention metal fitting 51.

1 is a partial cross-sectional view of a rotary cultivator having a weed winding prevention structure according to a first embodiment of the present invention. 1 is a partial cross-sectional view of a weed winding prevention structure in a rotary cultivator according to a first embodiment of the present invention. The arrow A view in FIG. 2 of the weed winding prevention structure in the rotary tiller which concerns on 1st Example of this invention. The partial sectional view of the weed winding prevention structure in the rotary cultivator according to the second embodiment of the present invention. The arrow B view in FIG. 4 of the weed winding prevention structure in the rotary tiller which concerns on 2nd Example of this invention. The partial cross section figure of the weed-winding prevention structure in the rotary tiller according to the third embodiment of the present invention. The arrow C view in FIG. 6 of the weed winding prevention structure in the rotary tiller which concerns on 3rd Example of this invention. The partial sectional view of the weed winding prevention structure in the rotary cultivator according to the fourth embodiment of the present invention. The arrow D view in FIG. 8 of the weed winding prevention structure in the rotary tiller which concerns on 4th Example of this invention. The partial sectional view of the weed winding prevention structure in the rotary tiller according to the fifth embodiment of the present invention. The E arrow line view in FIG. 10 of the weed winding prevention structure in the rotary tiller which concerns on 5th Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tillage nail attachment structure 2 Holder 200 Insertion hole 201 Bottom part 3 Tillage nail 300 Base 4 Tillage nail attachment bolt 5 Tillage nail axis AA Center axis 51 Fence prevention clasp 52 Fastening bolt 53 Case side cover 54 Flange side cover 55 Oil seal 56 Side wall of rotary cover

Claims (5)

A rotary cover is attached to the rotary tillage shaft to form a tillage portion, and has a rotary cover that covers the top of the tillage portion,
The rotary cover is a rotary cultivator having a side plate that covers a side of the tillage unit,
It is fixed near the outer diameter of the drive flange located at the end of the rotary tillage claw shaft,
Extending to near the side plate of the rotary cover,
A structure for preventing weed winding in a rotary tiller, characterized in that it is provided with a weed winding preventing metal fitting that rotates with rotation of the tilling claw shaft. The said weed winding prevention metal fitting is attached with the fastener which fastens the said drive flange and the shaft side flange by the side of the said driving claw axis | shaft, The weed grass winding in the rotary tiller of Claim 1 characterized by the above-mentioned. Anti-stick structure. 2. The anti-wound winding prevention in the rotary tiller according to claim 1, wherein the anti-weed winding prevention metal fitting is fixed to a head of a fastener for fixing the tilling nail to the tilling nail shaft. Construction. 2. The structure for preventing wrapping of weeds in a rotary tiller according to claim 1, wherein the clasps for preventing wrapping of weeds have an annular shape surrounding an outer periphery of the drive flange. Near the outer peripheral surface of the ring-shaped anti-wound-preventing metal fitting, and for flipping off deposits adhering to the outer peripheral surface of the anti-weed-winding anti-metal fitting on the inner side of the side wall of the rotary cover. The scraper winding preventing structure for a rotary tiller according to claim 4, further comprising a scraper.

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