JP6598374B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can appropriately prevent wrapping of miscellaneous matters.

  DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known.

  This conventional agricultural machine includes a machine body having a shaft support portion, a rotary shaft body supported by the shaft support portion of the machine body and having a flange portion, and an outer peripheral portion of the shaft support portion attached to the flange portion of the rotary shaft body. And winding prevention means for preventing winding of miscellaneous matters (grass, rice straw, etc.). And the winding prevention means is comprised by the rod-shaped winding prevention body fixed by the nail | claw presser nut which supports a tilling nail | claw, for example so that it might protrude.

JP-A-2005-304403

  However, in the conventional farm work machine, since the winding preventing effect by the winding preventing means is insufficient, there is a possibility that foreign matters such as grass and rice straw may be wound around the outer peripheral portion of the shaft support portion.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent winding of miscellaneous goods appropriately.

The agricultural machine according to claim 1 is a machine body having a shaft support part, a rotary shaft body supported by the shaft support part and having a flange part, and attached to the flange part, to the outer peripheral part of the shaft support part. An anti-winding means for preventing wrapping of miscellaneous matter, wherein the entire circumference of the outer peripheral portion of the shaft support portion is covered by the anti-winding means, and the anti-winding means Has a winding prevention nut, and the winding prevention nut is attached to the flange portion of the rotary shaft body by a bolt .

The agricultural machine according to claim 2 is a machine body having a shaft support portion, a rotary shaft body supported by the shaft support portion and having a flange portion, and attached to the flange portion, to the outer peripheral portion of the shaft support portion. An anti-winding means for preventing wrapping of miscellaneous matter, wherein the entire circumference of the outer peripheral portion of the shaft support portion is covered by the anti-winding means, and the anti-winding means has a first winding prevention nut and Volume 2-preventing nut with, only one of the first volume with preventive nut and the second winding with preventing nut, the rotation by bolts the flange portion of the shaft body in which is mounted together with the tilling claws.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 2, wherein each of the first winding prevention nut and the second winding prevention nut includes a nut portion in which a screw hole is formed, and the nut portion. The winding prevention part which covers the outer peripheral part of the shaft support part of the machine body, and the protrusion part which protrudes toward the axial direction center part side of this rotating shaft body from this winding prevention part.

  According to a fourth aspect of the present invention, in the agricultural machine according to the third aspect, the winding preventing portion is formed in an arc plate shape centering on the rotation center axis of the rotating shaft body.

  The agricultural machine according to claim 5 is the agricultural machine according to any one of claims 1 to 4, wherein the winding prevention means includes a plurality of first winding prevention nuts, and the first winding prevention nuts. Is constituted by a plurality of second winding prevention nuts having different shapes.

  The agricultural machine according to claim 6 is the agricultural machine according to any one of claims 1 to 5, wherein the machine body includes a shaft support body provided with a shaft support portion and a guard fixed to a lower portion of the shaft support body. And at least a lower part of the winding preventing means overlaps the guard body in a side view.

  The agricultural machine according to claim 7 is the agricultural machine according to any one of claims 1 to 5, wherein the machine body includes a shaft support body provided with a shaft support portion and a guard fixed to a lower portion of the shaft support body. A part of the guard body is located below the shaft support.

  The agricultural machine according to claim 8 is the agricultural machine according to any one of claims 1 to 5, wherein the machine body is provided on a left shaft support body provided with a left shaft support portion, and on a lower portion of the left shaft support body. A left guard body fixed, a right shaft support provided with a right shaft support, and a right guard body fixed to a lower portion of the right shaft support; the lower end of the left guard body and the right side The lower end of the guard body is located at the same height.

  According to the present invention, since the entire circumference of the outer peripheral portion of the shaft support portion is covered by the winding preventing means, it is possible to appropriately prevent the wrapping of foreign matters around the outer peripheral portion of the shaft support portion.

It is a side view of the agricultural working machine which concerns on the 1st Embodiment of this invention. It is a schematic block diagram of an agricultural working machine same as the above. It is a fragmentary perspective view of an agricultural working machine same as the above. It is a fragmentary sectional view by the side of the chain case of an agricultural working machine same as the above. It is a side view of the winding prevention means of an agricultural working machine same as the above. It is a figure which shows the 1st winding prevention nut of a winding prevention means same as the above, (a) is a perspective view, (b) is a side view, (c) is a front view. It is a figure which shows the nut for 2nd winding prevention of a winding prevention means same as the above, (a) is a perspective view, (b) is a side view, (c) is a front view. It is a fragmentary sectional view by the side of the bracket of an agricultural working machine same as the above. It is a partial side view of an agricultural working machine same as the above. It is a side view of the winding prevention means of the agricultural working machine which concerns on the 2nd Embodiment of this invention. It is a figure which shows the 1st winding prevention nut of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a figure which shows the nut for 2nd winding prevention of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a side view of the winding prevention means of the agricultural working machine which concerns on the 3rd Embodiment of this invention. It is a figure which shows the 1st winding prevention nut of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a figure which shows the nut for 2nd winding prevention of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a side view of the winding prevention means of the agricultural working machine which concerns on the 4th Embodiment of this invention. It is a figure which shows the 1st winding prevention nut of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a figure which shows the nut for 2nd winding prevention of a winding prevention means same as the above, (a) is a side view, (b) is a front view. It is a schematic block diagram of the agricultural working machine which concerns on the 5th Embodiment of this invention. It is a fragmentary sectional view by the side of the chain case of an agricultural working machine same as the above. FIG. 21 is a partially enlarged view of FIG. 20. It is a fragmentary sectional view by the side of the bracket of an agricultural working machine same as the above. FIG. 23 is a partially enlarged view of FIG. 22. It is a left and right side view of a farm working machine same as the above. It is a left and right side view of a farm work machine concerning a 6th embodiment of the present invention.

  A first embodiment of the present invention will be described with reference to FIGS.

  1 and 2, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to a rear portion of a tractor (not shown), which is a traveling vehicle, for example, and travels through an agricultural field (such as a paddy field or a field) as the tractor travels. This is a tillage working machine that performs tillage work while moving forward in the direction.

  The farm work machine 1 includes a machine body 2 connected to a three-point link (a farm work machine lifting support device) at the rear of a tractor (not shown).

  The airframe 2 has a mission case 4 in which a front-rear input shaft 3 projects forward, at the center in the left-right direction. The input shaft 3 is connected to the PTO shaft of the tractor via a joint, and rotates when the PTO shaft rotates to input power from the tractor side to the agricultural machine 1 side.

  The left and right side portions of the mission case 4 are respectively attached with inner end portions of a frame pipe 5 that is longitudinal in the left-right direction.

  An upper end portion of a chain case (one side shaft support) 6 which is a box-shaped left shaft support is attached to the left end which is the outer end of the left frame pipe 5 which is one side. Further, an upper end portion of a bracket (other side shaft support) 7 which is a plate-like right shaft support is attached to a right end which is an outer end of the right frame pipe 5 which is the other side.

  Further, between the lower part of the chain case 6 and the lower part of the bracket 7 that are opposed to each other, a cultivating means that performs cultivating work while rotating in a predetermined rotational direction (for example, a down cut direction) by power from the input shaft 3 side ( (Rotary) 11 is built.

  Further, the upper part of the tilling means 11 is covered with a tilling cover 10 of the airframe 2, and a plate-like leveling means (level flat plate) for performing leveling work behind the tilling means 11 is provided at the rear end of the tilling cover 10. ) 12 is provided so as to be pivotable in the vertical direction about the horizontal axis 13.

  A ground pressure adjusting means 15 for adjusting the ground pressure of the leveling means 12 is provided between the leveling means 12 and the machine body 2. Further, a gauge ring means 16 for adjusting the tilling depth of the tilling means 11 is provided at the front portion of the machine body 2 so that the height position can be adjusted.

  As shown in FIG. 2, the tillage means 11 is attached to the rotary shaft 21 so as to be detachable. And a plurality of tilling claws 22 for tilling work. The tilling claw 22 has a plurality of bolt holes 22a.

  The rotating shaft body 21 is rotatably supported by the left and right shaft support portions 20 of the airframe 2 at both ends in the axial direction. That is, the left end portion, which is one axial end portion of the rotating shaft body 21, is rotatably supported by the cylindrical shaft support portion 20 provided at the lower portion of the chain case 6, and the axial direction of the rotating shaft body 21. The right end portion, which is the other end portion, is rotatably supported by a cylindrical shaft support portion 20 provided at the lower portion of the bracket 7.

  Each of the left and right shaft support portions (bearing portions) 20 includes, for example, a bearing 17, a retaining ring 18, a boss (bearing housing) 19 and a floating seal 23 (see FIGS. 4 and 8). In FIG. 4, the floating seal 23 is not shown.

  Further, at both ends of the rotating shaft 21 in the axial direction, a winding preventing means for preventing wrapping of foreign matters (grass, rice straw, etc.) around the outer peripheral portion (outer peripheral surface) of the shaft support portion 20 of the machine body 2. 25 are attached to each.

  Each winding prevention means (winding prevention nut group) 25 covers the entire circumference (including substantially the entire circumference) of the outer peripheral portion of the shaft support portion 20 of the machine body 2. That is, the entire circumference of the outer peripheral portion of the shaft support portion 20 on the chain case 6 side is covered by the winding preventing means (a plurality of special nuts) 25 on the left end side of the rotary shaft body 21, and the right end side of the rotary shaft body 21 is covered. The whole circumference of the outer peripheral portion of the shaft support portion 20 on the bracket 7 side is covered with the winding preventing means (a plurality of special nuts) 25.

  The left wrapping prevention means 25 and the right wrapping prevention means 25 are the same in basic configuration except that they are configured symmetrically. A chain case guard 26 is fixed to the lower part of the chain case 6, and a bracket guard 27 is fixed to the lower part of the bracket 7. Further, the chain case 6 includes a vertically long plate portion 6a and a cover portion 6b fixed to the plate portion 6a.

  Further, as shown in FIGS. 8 and 9, the bracket guard 27 is fixed to the lower portion of the bracket 7 of the airframe 2 so as to cover the axial end surface of the rotary shaft body 21. The bracket guard 27 has a shape extending downward as compared with the conventional one. For this reason, at least the lower part of the winding preventing means 25 overlaps the bracket guard 27 in a side view. In other words, the lower part of the winding preventing means 25 does not protrude below the bracket guard 27 in a side view. Although not shown, for example, the lower portion (lowermost portion) of the winding preventing means 25 may protrude downward from the bracket guard 27 in a side view.

  In the example shown in FIGS. 8 and 9, the lower end (lowermost part) 27a of the bracket guard 27 coincides with the outer peripheral edge (lowermost part) of the cylindrical winding preventing means 25 in a side view. However, it may be positioned below the outer peripheral edge of the winding preventing means 25.

  Here, as shown in FIGS. 2 to 4, the rotary shaft body 21 includes a tilling shaft 31 having disc-shaped tilling claw attachment portions (flange) 30 arranged at intervals in the left-right direction (axial direction); The spline shaft (left shaft) 32 attached to the tilling claw mounting portion 30 at the left end of the tilling shaft 31 and the right shaft 33 attached to the tilling claw mounting portion 30 at the right end of the tilling shaft 31 Yes.

  Each of the spline shaft 32 and the right shaft 33 includes a left-right axial portion 36 and a disk-like plate-like portion (flange) 37 provided integrally with the inner end portion of the axial portion 36. Has been.

  The left and right outermost flange portions (shaft end flange portions) 40 of the rotating shaft 21 are configured by the plate-like portion 37 and the tilling claw attachment portion 30 that are opposed to each other and overlapped with each other. The flange portions 40 are located at both ends in the axial direction of the rotary shaft body 21, and a plurality of bolt holes 40 a are formed in the flange portions 40.

  A sprocket 38 is spline-fitted to the shaft-like portion 36 of the spline shaft 32 and fixed with a double nut 39. A chain (not shown) disposed in the chain case 6 is wound around the sprocket 38.

  The winding preventing means (left winding preventing means) 25 includes, for example, a plurality of (for example, two) first winding preventing nuts 41 and the first winding as shown in FIGS. The anti-adhesion nut 41 is composed of a plurality of (for example, two) second anti-adhesion nuts 42 having slightly different shapes. In other words, the respective winding preventing means 25 on both the left and right sides are connected to a plurality (for example, four) of the winding preventing nuts 41 and 42 positioned side by side in the state of being close to each other (including contact) in the rotation direction of the rotating shaft 21. Configured.

  Only one of at least two types of the first winding prevention nut 41 and the second winding prevention nut 42, that is, only the first winding prevention nut 41, for example, is rotated by the bolt 43. Attached to the flange portion 40 together with the tilling claw 22 and detachably attached.

  As shown in FIGS. 6A to 6C, the first winding preventing nut 41 is, for example, a flat plate-like nut member 51 and an arc plate shape fixed to the end surface of the nut member 51 by welding or the like. And a special nut made of metal integrally formed with the anti-winding member 52. In addition, it does not consist of the two members 51 and 52 which are separate bodies, but may be composed of, for example, one member.

  The first winding prevention nut 41 includes a plurality of, that is, for example, a flat plate shape in which two screw holes 53 are formed, and a nut portion (plate-shaped nut portion) 54 that is long in the rotational direction of the rotary shaft 21. Have.

  The inner end surface (one end surface in the width direction) on the rotation center axis X side of the nut portion 54 is close to (including contact with) the outer peripheral surface along a part of the cylindrical outer peripheral surface of the shaft support portion 20. A positioning arcuate surface 55 is formed.

  On the outer end surface (the other end surface in the width direction) opposite to the rotation center axis X side of the nut portion 54, the shaft support portion 20 is positioned slightly away from the outer peripheral surface of the shaft support portion 20 in the radial direction. An arcuate plate-shaped winding preventing portion 56 that covers a part of the outer peripheral surface is fixed so as to have a width direction in the plate thickness direction of the nut portion 54.

  The winding preventing portion 56 is formed in an elongated arc plate shape along the rotation direction around the rotation center axis X of the rotary shaft 21. And this winding prevention part 56 protrudes toward the chain case 6 side (left side) from the nut part 54, and there is a slight gap between this winding prevention part 56 and the plate part 6a of the chain case 6. There is a gap (for example, about 1 mm to 2 mm) 57 (see FIG. 4). Note that there may be no gap 57 between the winding preventing portion 56 and the chain case 6.

  Further, from the side surface of one end portion in the longitudinal direction of the winding preventing portion 56, a rectangular plate-like projecting portion 58 curved in an arc shape so as to be located on the same plane as the winding preventing portion 56 is provided on the rotating shaft body 21. It protrudes integrally toward the flange portion 40 side (the axial center portion side of the rotary shaft 21), that is, the side opposite to the chain case 6 side (right side). The projecting portion 58 is located close to (including contact with) the outer peripheral surface of the flange portion 40, and the tip end portion 58a of the projecting portion 58 is located so as to project rightward from the flange portion 40. Yes.

  As shown in FIGS. 7A to 7C and the like, the second winding prevention nut 42 is, for example, a flat nut member 61 and the nut member 61, as in the first winding prevention nut 41. This is a metal special nut integrally formed with an arcuate plate-shaped winding preventing member 62 fixed to the end face by welding or the like. In addition, it does not consist of the two members 61 and 62 which are separate bodies, For example, you may comprise by one member.

  The second winding preventing nut 42 has a plurality of, that is, for example, a flat plate shape in which two screw holes 63 are formed, and a nut portion (plate-shaped nut portion) 64 that is long in the rotation direction of the rotary shaft 21. Have.

  The inner end surface (one end surface in the width direction) on the rotation center axis X side of the nut portion 64 is close to (including contact with) the outer peripheral surface along a part of the cylindrical outer peripheral surface of the shaft support portion 20. A positioning arcuate surface 65 is formed.

  On the outer end surface (the other end surface in the width direction) opposite to the rotation center axis X side of the nut portion 64, the shaft support portion 20 is positioned slightly away from the outer peripheral surface of the shaft support portion 20 in the radial direction. An arcuate plate-shaped winding preventing portion 66 covering a part of the outer peripheral surface is fixed so as to have a width direction in the plate thickness direction of the nut portion 64.

  The winding preventing portion 66 is formed in an elongated arc plate shape along the rotation direction around the rotation center axis X of the rotary shaft 21. The winding preventing portion 66 is slightly longer than the winding preventing portion 56 of the first winding preventing nut 41. And this winding prevention part 66 protrudes toward the chain case 6 side (left side) from the nut part 64, and there is little between this winding prevention part 66 and the plate part 6a of the chain case 6. There is a gap (for example, about 1 mm to 2 mm) 67 (see FIG. 4). It should be noted that there may be no gap 67 between the winding preventing portion 66 and the chain case 6.

  Further, from the side surface of one end portion in the longitudinal direction of the winding preventing portion 66, a rectangular plate-like projecting portion 68 curved in an arc shape so as to be located on the same plane as the winding preventing portion 66 is provided on the rotating shaft body 21. It protrudes integrally toward the flange portion 40 side (the axial center portion side of the rotary shaft 21), that is, the side opposite to the chain case 6 side (right side). The projecting portion 68 is located close to (including contact with) the outer peripheral surface of the flange portion 40, and the tip end portion 68a of the projecting portion 68 is located so as to project rightward from the flange portion 40. Yes.

  The second winding preventing nut 42 has its nut portion 64 attached and fixed directly to the plate-like portion 37 of the flange portion 40 of the rotary shaft body 21 with a bolt 43.

  In contrast, the nut portion 54 of the first winding prevention nut 41 is fixed by being attached to the plate-like portion 37 of the flange portion 40 of the rotating shaft 21 via the tilling claw 22 with the bolt 43. That is, the base end portion of the tillage claw 22 is clamped and fixed between the nut portion 54 of the first winding prevention nut 41 and the flange portion 40 of the rotary shaft 21 by screwing and tightening the bolt 43 into the screw hole 53. Yes.

  Thus, the shaft 2 of the airframe 2 is formed by the arcuate plate-like winding preventing portions 56 of the plurality of first winding preventing nuts 41 and the arcuate plate-like winding preventing portions 66 of the plurality of second winding preventing nuts 42. The entire circumference of the outer peripheral portion of the support portion 20, that is, the entire outer peripheral surface of the shaft support portion 20 (including substantially the whole), for example, is covered.

  Next, the operation and the like of the farm work machine 1 will be described.

  When the farm work machine 1 is connected to the rear part of the tractor and the farm work machine 1 is moved forward by the traveling of the tractor, each of the tilling claws 22 of the tillage means 11 is integrated with the rotary shaft 21 to set the rotation center axis X. Plowing work is performed while rotating in a predetermined rotation direction as the center, and behind the plowing means 11, the leveling means 12 performs the leveling work to flatten the field scene.

  At this time, the outer peripheral portion of the shaft support portion 20 that rotatably supports the rotary shaft 21 at the positions on both ends in the axial direction of the rotary shaft 21 of the tillage means 11 is the winding preventing means (winding). It is covered with prevention nuts 41, 42) 25.

  For this reason, miscellaneous matters such as grass and rice straw in the field do not wrap around the outer periphery of the shaft support portion 20. Further, foreign matters such as grass and rice straw are wound from the gaps 57 and 67 between the winding preventing parts 56 and 66 and the chain case 6 and from the gaps 57 and 67 between the winding preventing parts 56 and 66 and the bracket 7. There is no possibility of entering the space 70 between the anti-sticking portions 56 and 66 and the outer peripheral portion of the shaft support portion 20.

  And according to the agricultural machine 1, since the entire circumference of the outer periphery of the shaft support part 20 of the machine body 2 is covered by each winding prevention means 25, the winding of miscellaneous items around the outer periphery of the shaft support part 20 is prevented. Can be prevented appropriately.

  Each of a plurality of (for example, four) winding prevention nuts 41 and 42 constituting each winding prevention means 25 is a plate-like nut portion 54 in which screw holes 53 and 63 into which bolts 43 are screwed are formed. , 64, plate-like anti-winding portions 56, 66 provided on the nut portions 54, 64 and covering the outer peripheral portion of the shaft support portion 20 to prevent wrapping of foreign matters, and the anti-winding portion 56, Since it has plate-like projecting portions 58 and 68 projecting from 66 to the flange portion 40 side which is the axial center portion side of the rotating shaft body 21, the winding preventing portions 56 and 66 prevent the wrapping of miscellaneous objects. It can be prevented appropriately, and the protrusions 58 and 68 can cover the flange portion 40 of the rotating shaft 21 to protect it from wear and the like, and the protrusions 58 and 68 are provided with the anti-winding nuts 41 and 42. It can also be used as a knob.

  Furthermore, when attaching the anti-winding nuts 41 and 42 to the flange portion 40 using the bolt 43, for example, during maintenance or claw replacement, the arcuate surfaces 55 and 65 of the anti-winding nuts 41 and 42 are By touching the outer peripheral surface of the boss 19 of the shaft support portion 20, the screw holes 53, 63 of the nut portions 54, 64 and the bolt hole 40a of the flange portion 40 can be aligned with each other, so that the hole alignment is easy. The attachment work of the winding preventing nuts 41 and 42 to the flange portion 40 can be easily performed.

  Next, FIG. 10 to FIG. 12 show the winding preventing means 25 of the agricultural working machine 1 according to the second embodiment.

  In the wrapping preventing means 25, the thickness of the nut portion 54 of the first wrapping preventing nut 41 is not constant but partially thin for weight reduction. That is, for example, in the plate-like nut portion 54, the portion 54b other than the peripheral portion 54a of the screw hole 53 is formed thinner than the peripheral portion 54a of the screw hole 53.

  Similarly, the thickness of the nut portion 64 of the second anti-winding nut 42 is not constant but partially thin for weight reduction. That is, for example, in the plate-like nut portion 64, a portion 64b other than the peripheral portion 64a of the screw hole 63 is formed thinner than the peripheral portion 64a of the screw hole 63. The thickness dimension of the peripheral portions 54a and 64a of the screw holes 53 and 63 is the same as (including substantially the same) the thickness dimension of the nut portions 54 and 64 having a constant thickness in the first embodiment, for example. .

  Next, FIG. 13 to FIG. 15 show the winding preventing means 25 of the agricultural machine 1 according to the third embodiment.

  In this winding prevention means 25, the length along the rotation direction of the nut portion 54 of the first winding prevention nut 41 is shorter than the length along the rotation direction of the winding prevention portion 56 for weight reduction. It has become. That is, for example, the nut portion 54 shown in FIG. 14 has a shape in which the other portion of the nut portion 54 shown in FIG.

  Similarly, the length along the rotational direction of the nut portion 64 of the second anti-winding nut 42 is shorter than the length along the rotational direction of the anti-winding portion 66 for weight reduction. That is, for example, the nut portion 64 shown in FIG. 15 has a shape in which the other portions of the nut portion 64 shown in FIG.

  Next, FIG. 16 to FIG. 18 show the winding preventing means 25 of the agricultural machine 1 according to the fourth embodiment.

  In the winding preventing means 25, the size of the protrusions 58 and 68 protruding toward the flange portion 40 is larger than that of the protrusions 58 and 68 according to the above-described embodiments. That is, for example, the protruding portion 58 of the first winding prevention nut 41 is made large enough not to interfere with the tilling claw 22, and the protruding portion 68 of the second winding prevention nut 42 is made as large as the winding prevention portion 66. It is a thing. The length along the rotation direction of the projecting portion 68 is the same (including substantially the same) as the length along the rotation direction of the winding preventing portion 66, for example.

  In any of the above embodiments, the configuration in which the first winding prevention nut 41 and the second winding prevention nut 42 have different shapes has been described. The two-winding prevention nut 42 may have the same shape.

  Further, there is a slight gap between the first winding prevention nut 41 and the second winding prevention nut 42 adjacent to each other in the rotation direction. For example, the two adjacent nuts 41 and 42 so as not to have a gap. The structure which mutually contact | abutted may be sufficient. Further, the winding preventing means 25 may cover substantially the entire circumference of the outer peripheral portion of the shaft support portion 20 so that a gap of a predetermined dimension exists between the adjacent nuts 41 and 42.

  Next, the agricultural machine 1 according to the fifth embodiment shown in FIGS. 19 to 24 will be described.

  In the fifth embodiment, the shape of the chain case guard 26, which is the left guard body fixed to the lower part of the left side (traveling direction left side) chain case 6, is slightly different from that of the above embodiment. And the shape of the bracket guard 27 which is a right guard body fixed to the lower part of the bracket 7 on the right side (traveling direction right side) is slightly different from that of the above embodiment.

  First, the chain case guard 26 has a plate-like side surface covering portion 71 that covers the outer side surface of the chain case 6 and a plate-like circular arc shape that is connected to the lower end portion of the side surface covering portion 71 and covers the lower surface of the chain case 6. A lower surface covering portion 72 is provided, and a stepped portion 73 is formed in the middle of the lower surface covering portion 72.

  At least the lower part of the left cylindrical (including substantially cylindrical) winding preventing means 25 overlaps the chain case guard 26 in a side view (see FIG. 24).

  Here, as shown in FIG. 21, the inner end surface of the lower surface covering portion 72 of the chain case guard 26 faces the outer end surface of the winding preventing means 25, and a gap 75 exists between them. When viewed from the side, the lower surface covering portion 72 of the chain case guard 26 and the arc plate-like winding preventing portions 56 and 66 of the winding preventing means 25 (the winding preventing portion 56 of the first winding preventing nut 41 and At least one of the anti-winding portions 66 of the second anti-winding nut 42 overlaps with a predetermined overlap dimension A.

  The lower surface covering portion 72 of the chain case guard 26 is positioned below the chain case 6, and a space 76 exists between the lower surface of the chain case 6 and the upper surface of the lower surface covering portion 72. .

  Here, as shown in FIG. 21, the tip end portion 72 a of the lower surface covering portion 72 of the chain case guard 26 is located below the plate portion 6 a of the chain case 6. Therefore, in plan view, the plate portion 6a of the chain case 6 and the lower surface covering portion 72 of the chain case guard 26 overlap each other with a predetermined overlap dimension B.

  Next, the bracket guard 27 is connected to the plate-like side surface covering portion 81 that covers the outer surface of the bracket 7 and the outer surface of the shaft end surface cover plate 80 and the lower end portion of the side surface covering portion 81 and covers the lower surface of the bracket 7. And an arc-shaped lower surface covering portion 82.

  Then, at least the lower part of the right cylindrical (including substantially cylindrical) winding preventing means 25 overlaps the bracket guard 27 in a side view (see FIG. 24).

  Here, as shown in FIG. 23, the inner end surface of the lower surface covering portion 82 of the bracket guard 27 faces the outer end surface of the winding preventing means 25, and a gap 85 exists between them. When viewed from the side, the lower surface covering portion 82 of the bracket guard 27 and the arc-plate-shaped winding preventing portions 56 and 66 of the winding preventing means 25 (the winding preventing portion 56 of the first winding preventing nut 41 and the first winding preventing portion 56 and 66). At least one of the anti-winding portions 66 of the anti-winding nut 42) overlaps each other with a predetermined overlap dimension C.

  Further, the lower surface covering portion 82 of the bracket guard 27 is located below the bracket 7, and a space portion 86 exists between the lower surface of the bracket 7 and the upper surface of the lower surface covering portion 82.

  Here, as shown in FIG. 23, the lower surface covering portion 82 of the bracket guard 27 is located below the plate portion 7 a constituting the bracket 7. For this reason, in plan view, the plate portion 7a of the bracket 7 and the lower surface covering portion 82 of the bracket guard 27 overlap each other with a predetermined overlap dimension D.

  Furthermore, as shown in FIG. 24, the lower end (lowermost part) 26a of the left chain case guard 26 and the lower end (lowermost part) 27a of the right bracket guard 27 are the same height (substantially the same height). Is included). The lower ends 26a and 27a of the guards 26 and 27 are coincident with the outer peripheral edge (lowermost part) of the winding preventing means 25 or the outer peripheral edge (lowermost part) of the winding preventing means 25. Is located below. Further, for example, the outer peripheral edge (lowermost part) of the winding preventing means 25 may be positioned below the lower ends 26a and 27a of the guards 26 and 27.

  That is, for example, in the fifth embodiment, the lower end 26a of the chain case guard 26 is disposed slightly below the lower end 27a of the bracket guard 27.

  In other words, during the working posture of the agricultural machine 1, the vertical distance a (for example, 124 mm) between the rotation center axis X and the lower end (lowermost point) 26a is the rotation center axis X and the lower end (lowermost point) 27a. Is slightly longer than the vertical distance b (for example, 113 mm).

  For example, although not shown, conversely, the vertical distance a between the rotation center axis X and the lower end (lowermost point) 26a is the vertical distance b between the rotation center axis X and the lower end (lowermost point) 27a. For example, as shown in FIG. 25, the two vertical distances a and b may be equal to each other. That is, for example, the longer vertical distance may be 1.0 to 1.2 times the shorter vertical distance. Note that other configurations in the fifth embodiment are basically the same as those in the first embodiment.

  And according to the agricultural machine 1 of 5th Embodiment, there exists an effect of being able to prevent appropriately the winding of the miscellaneous material to the outer peripheral part of the axial support part 20 of the body 2 by the winding prevention means 25. In addition, the chain case 6 can be properly protected by the chain case guard 26, and the bracket 7 can be appropriately protected by the bracket guard 27.

  Further, since the lower end 26a of the chain case guard 26 and the lower end 27a of the bracket guard 27 are located at the same height, the inclination of the tilling means 11 can be reduced during the tilling work.

  For example, although not shown, a part of the guard body (the chain case guard 26 and the bracket guard 27) may be positioned below the anti-winding means 25 and cover the lower surface of the anti-winding means 25.

  Further, the shape of the guard body (chain case guard 26, bracket guard 27) is not limited to that shown in the figure, and for example, a structure in which the stepped portion 73 is not formed on the chain case guard 26 may be used.

  Although several embodiments of the present invention and modifications thereof have been described, the above-described embodiments and modifications can be appropriately combined without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Farming machine 2 Airframe 6 Chain case which is left side shaft support body 7 Bracket which is right side shaft support body
20 shaft support
21 Rotating shaft
22 Tillage claw
25 Winding prevention means
26 Chain case guard, left guard body
27 Bracket guard as right guard body
40 Flange
41 Nuts for preventing the first winding
42 Nut for preventing second winding
43 bolts
53, 63 Screw hole
54, 64 Nut
56, 66 Winding prevention part
58, 68 Protruding part

Claims (8)

An airframe having a shaft support;
A rotating shaft body supported by the shaft support portion and having a flange portion;
An anti-winding means that is attached to the flange portion and prevents wrapping of miscellaneous matter around the outer periphery of the shaft support portion;
An agricultural machine in which the entire circumference of the outer peripheral portion of the shaft support portion is covered by the winding preventing means ,
The winding preventing means has a winding preventing nut,
The agricultural machine according to claim 1, wherein the winding prevention nut is attached to the flange portion of the rotating shaft body by a bolt . An airframe having a shaft support;
A rotating shaft body supported by the shaft support portion and having a flange portion;
An anti-winding means that is attached to the flange portion and prevents wrapping of miscellaneous matter around the outer periphery of the shaft support portion;
An agricultural machine in which the entire circumference of the outer peripheral portion of the shaft support portion is covered by the winding preventing means,
The winding preventing means has a first winding preventing nut and a second winding preventing nut,
Wherein only one of the first volume with preventive nut and the second winding with preventing nut, characterized by being mounted with tilling claws to the flange portion of the rotary shaft body by bolts agriculture Work machine. Each of the first winding prevention nut and the second winding prevention nut is
A nut portion in which a screw hole is formed;
An anti-winding portion provided on the nut portion and covering the outer periphery of the shaft support portion of the airframe;
The agricultural working machine according to claim 2, further comprising: a projecting portion projecting from the winding preventing portion toward the axially central portion side of the rotating shaft body. The agricultural working machine according to claim 3, wherein the winding preventing portion is formed in an arc plate shape centering on a rotation center axis of the rotating shaft body. The winding preventing means includes a plurality of first winding preventing nuts and a plurality of second winding preventing nuts having different shapes from the first winding preventing nuts. The agricultural machine according to any one of claims 1 to 4. The airframe has a shaft support body provided with a shaft support portion, and a guard body fixed to the lower portion of the shaft support body,
The agricultural working machine according to any one of claims 1 to 5, wherein at least a lower portion of the winding preventing means overlaps the guard body in a side view. The airframe has a shaft support body provided with a shaft support portion, and a guard body fixed to the lower portion of the shaft support body,
The agricultural working machine according to any one of claims 1 to 5, wherein a part of the guard body is located below the shaft support body. The aircraft
A left shaft support provided with a left shaft support;
A left guard body fixed to the lower portion of the left shaft support;
A right shaft support provided with a right shaft support;
With the right guard body fixed to the lower part of the right shaft support,
The farm work machine according to any one of claims 1 to 5, wherein a lower end of the left guard body and a lower end of the right guard body are positioned at the same height.

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