JP4575466B2 - Crushed material - Google Patents

Description

  The present invention relates to a crushed member to be mounted on a crushed shaft in a working machine such as a biaxial rotary tiller.

  2. Description of the Related Art A working vehicle in which a crushed shaft and a crushed member are arranged on the rear side of a cultivating shaft and a cultivating claw for cultivating soil is widely used as a biaxial rotary cultivator including a biaxial rotary shaping machine. (For example, refer to Patent Document 1 below).

  Specifically, the working vehicle includes a tilling shaft disposed along the vehicle width direction in a state of being operatively connected to the PTO shaft in the working vehicle main unit, a tilling claw attached to the tilling shaft, and the PTO shaft. A ground breaking shaft arranged along the vehicle width direction on the vehicle rear side from the tilling shaft in a state of being operatively connected to the tilling shaft, and a soil breaking member attached to the soil breaking shaft, and is plowed by the tilling claws. The upper layer portion of the soil can be crushed by the crushed member.

Although the said patent document 1 describes the crushing nail | claw, the scratching halo, and the cage type | mold halo as said crushing member, there existed the following inconvenience in these crushing members.
That is, when the crushing claw is used as the crushing member, it is difficult to secure a sufficient crushing area in the vehicle width direction and it is difficult to obtain the smoothness of the upper surface of the crushing area.
On the other hand, when using the scraping halo and the cage-type halo as the crushed member, it is possible to crushed a relatively large area in the vehicle width direction, but on the other hand, unnecessary objects such as grass and straw are easily entangled with the halo, As transmission efficiency deteriorates, it affects the smoothness of the upper surface of the crushed soil region.

Furthermore, in the case of using the above-mentioned scraping halo and basket type halo in soil with a high water content, a portion located immediately below the crushed soil layer crushed by the halo (for example, 2 to 2 downward from the lowest end of the halo). There was also a disadvantage that a hard layer was present between the roughened layer cultivated by the cultivating claws and the crushed soil layer crushed by the crushed member. The hard layer can adversely affect the growth of the transplanted crop.
Japanese Unexamined Patent Publication No. 60-019406

  The present invention has been made in view of the above prior art, and can widen the crushed area in the vehicle width direction while maintaining the smoothness of the upper surface of the crushed area, can prevent deterioration in transmission efficiency, and It is an object of the present invention to provide a crushed member capable of effectively preventing a hard layer from being formed between the raising layer and the crushed layer.

  The crushed member according to the present invention is disposed along the vehicle width direction of the work vehicle main unit and is operatively driven to rotate about the axis by the rotational power from the PTO shaft provided in the work vehicle main unit. In the crushed member that is mounted on the crushed shaft in a relatively non-rotatable manner, the disc-shaped rotor is supported on the crushed soil shaft so as not to be relatively rotatable around the axis, and a plurality of rods fixed to the rotor, each of which is A central portion fixed to the rotor, and a plurality of first rod portions and second rod portions that extend from the central portion to one side and the other side in the rotational axis direction of the rotor, and whose tip portions are free ends. A rod, and an auxiliary tilling claw detachably attached to the rotor, the auxiliary tilling claw detachably coupled to the rotor, and a rotation axis of the rotor from the base end. To the standard And claw portions extending radially outward, wherein the claw portions are located radially outward with respect to the rotation axis of the rotor rather than the plurality of rods. is there.

According to the soil breaking member having the above-described configuration, the disk-shaped rotor to which the plurality of rods are fixed is rotationally driven around the soil breaking axis, whereby the plurality of rods break the upper layer portion of the soil. The plurality of rod portions have a central portion fixed to the rotor, and a first rod portion and a second rod portion extend from the central portion to one side and the other side in the rotation axis direction of the rotor, respectively, The part is a free end.
Further, a base end portion of the auxiliary tilling claw is detachably connected to the rotor, and the pawl portion of the auxiliary tilling claw extends radially outward from the base end portion with respect to the rotation axis of the rotor. Yes. The claw portion of the auxiliary tilling claw is located radially outward from the plurality of rods with reference to the rotation axis of the rotor.
Therefore, when the rotor is driven to rotate around the crushing axis, the claw portions of the auxiliary tilling claw cultivate a layer deeper than the soil to be crushed by the plurality of rods.

  Thus, in addition to the rod which crushes the upper layer part of soil, by providing the auxiliary tilling nail which cultivates the layer deeper than the layer which the rod crushes, a wider crushed area can be secured. Furthermore, a hard layer is formed between the roughening layer cultivated by the tilling claw and the crushed soil layer crushed by the crushed member by cultivating the layer deeper than the layer where the rod crushed the auxiliary tilling nail. Can be effectively prevented.

  Preferably, each of the plurality of rods has a radial distance between the rotation axis of the rotor and the rotation axis of the rotor across the entire area of the first and second rod portions. It is the same as the radial distance, and is symmetrical with respect to the rotor in a state where the tip portions of the first and second rod portions are positioned upstream of the central portion in the rotational direction of the rotor. The auxiliary tilling claw is attached to the rotor so that the claw portion is positioned on the upstream side in the rotational direction of the rotor as it goes from the base end side to the free end side.

In this case, the distance in the rotor radial direction between the plurality of rods symmetric with respect to the rotor and the rotation axis of the rotor is the center of the rod over the entire area of the first and second rod parts, respectively. The radial distance from the rotation axis of the rotor is the same (that is, the first and second rod portions are substantially along the rotation direction of the rotor), and the tips of the first and second rod portions The part is located upstream of the central part in the rotational direction of the rotor.
Furthermore, the claw portion of the auxiliary tilling claw is positioned on the upstream side in the rotational direction of the rotor as it goes from the base end side to the free end side.
Thereby, it can prevent effectively that an unnecessary thing, such as a cocoon and grass, becomes entangled with a some rod and auxiliary tilling nail.

  More preferably, the auxiliary tilling claw is a nail claw that is separated from the rotor in the rotation axis direction of the rotor as the claw portion goes from the base end side to the free end side.

  In this case, the claw portion of the auxiliary tilling claw is formed so as to be positioned away from the rotor in the rotational axis direction of the rotor as it goes from the base end side to the free end side. By using such a nail, it is possible to widely cultivate a layer deeper than the layer where the rod is crushed compared to when using a straight blade, so the roughing layer cultivated by the cultivating claw and the crushed member It is possible to effectively prevent a hard layer from being formed between the crushed soil layer.

Preferably, the plurality of rods include a plurality of first rods having a radial distance between the center portion and the rotation axis of the rotor as a first distance, and a rotation axis of the center portion and the rotor. A plurality of second rods having a radial distance between the first distance and the second distance longer than the first distance, and the crushed member is disposed at a position corresponding to each of the plurality of first rods. A plurality of the auxiliary tilling claws, each of the plurality of auxiliary tilling claws being connected to the rotor on the downstream side in the rotation direction of the rotor with respect to the first rod corresponding to the base end portion; part extends upstream from the low data rotation direction downstream side of the first rod so as to straddle the corresponding first rod relates rotational direction of the rotor.

In this case, the auxiliary tilling claw is coupled to the rotor at a position corresponding to the first rod whose proximal end portion has a shorter radial distance between the central portion of the rod and the rotation axis of the rotor. At this time, the claw portion of the auxiliary tillage claw extends from the downstream side in the rotational direction of the rotor to the upstream side with respect to the first rod so as to straddle the corresponding first rod in the rotational direction of the rotor. . That is, the tip of the claw is positioned upstream of the corresponding tip of the first rod in the rotational direction of the rotor, and the base of the claw is the rotor of the center of the corresponding first rod. Is located downstream in the direction of rotation.
Therefore, by connecting the base end portion of the auxiliary tilling claw to the rotor at a position corresponding to the first rod having a shorter radial distance between the center portion of the rod and the rotation axis of the rotor, the connecting space of the auxiliary tilling claw Can be secured.
Further, the auxiliary tilling claw is not connected at the position corresponding to the second rod, and the length of the pawl portion of the auxiliary tilling claw is made longer than the length of the rod portion, thereby reducing the number of auxiliary tilling claws attached. The effect can be kept high.

  More preferably, the plurality of auxiliary tilling claws include a first auxiliary tilling claw and a second auxiliary tilling claw respectively connected to a first side surface on one side and a second side surface on the other side in the rotation axis direction of the rotor, The first and second auxiliary tilling claws are alternately arranged around the rotation axis of the rotor.

In this case, the first auxiliary tilling claw connected to the first side surface on the one side in the rotation axis direction of the rotor and the second auxiliary tilling claw connected to the second side surface on the other side in the rotation axis direction of the rotor are rotated by the rotor. Alternatingly arranged around the axis.
Therefore, even if the moment around the rotation axis of the rotor is increased by connecting the auxiliary tilling claws to the rotor, the auxiliary tilling claws are evenly arranged on both side surfaces of the rotor, so that the rotation shake during the rotation of the rotor can be suppressed. it can.

  According to the ground breaking member according to the present invention, in addition to the rod for breaking the upper layer portion of the soil, by providing auxiliary tilling claws for plowing a layer deeper than the layer where the rod breaks, a wider ground breaking region is secured. be able to. Furthermore, a hard layer is formed between the roughening layer cultivated by the tilling claw and the crushed soil layer crushed by the crushed member by cultivating the layer deeper than the layer where the rod crushed the auxiliary tilling nail. Can be effectively prevented.

Hereinafter, an embodiment of a ground breaking member according to the present invention will be described with reference to the accompanying drawings.
In the present embodiment, a description will be given of a biaxial rotary shaping machine included in a biaxial rotary tiller as an example.
FIG. 1 is a schematic side view of a working vehicle provided with a biaxial rotary shaping machine to which a crushed member according to an embodiment of the present invention is applied.
In the following description, the terms “front”, “rear”, “right”, and “left” indicate directions viewed from an operator who is sitting forward facing a work vehicle unless otherwise limited. Further, the upper and lower terms indicate the positional relationship in the working vehicle in the working state (the state where the working machine is lowered) unless otherwise limited.

As shown in FIG. 1, the working vehicle 100 in the form of a riding tractor includes a working vehicle main body 50 and a biaxial rotary shaping machine 400 connected to a rear portion of the working vehicle main body 50.
The work vehicle main body 50 includes a traveling machine body 1, a pair of left and right front wheels 2 and a pair of left and right rear wheels 3 that support the traveling machine body 1, and an engine 4 mounted on the front portion of the traveling machine body 1. The rear wheel 3 and the front wheel 2 are operatively driven by power from the engine 4 so as to travel forward and backward. Reference numeral 5 in the figure denotes a hood that covers the engine 4.

The traveling machine body 1 includes an engine frame 13 having a front bumper 11 and a front axle case 12, and left and right machine body frames 15 that are detachably fixed to the rear portion of the engine frame 13 with bolts.
A transmission case 16 is connected to the rear part of the body frame 15 for appropriately shifting the rotation of the engine 4 and transmitting it to the rear wheel 3 and the front wheel 2 via the rear wheel shaft 3a and the front wheel shaft 2a, respectively. ing.
A PTO shaft 18 for outputting the driving force of the biaxial rotary shaping machine 400 is provided on the rear end surface of the transmission case 16 so as to protrude rearward.

Furthermore, the working vehicle 100 has a cabin 6 provided on the upper surface of the traveling machine body 1. Inside the cabin 6 are installed a control seat 7 and a control handle (round handle) 8 configured to move the steering direction of the front wheel 2 to the left and right by steering. The steering handle 8 is provided on a steering column 19 located in front of the steering seat 7.
Also, in the cabin 6, a left / right brake pedal 20 for braking the work vehicle 100 and a power transmission / removal operation from the engine 4 to the front wheels 2 and the rear wheels 3 are performed. To shift the output from the PTO shaft 18, the clutch pedal 21, the working machine lifting lever 22 acting as a vertical position setting means for manually changing the height position of the biaxial rotary shaping machine 400 The PTO speed change lever 23, the travel speed change lever 24 for speed changing the travel speed of the working vehicle main body 50, and the differential mechanism inserted in the power transmission path from the engine 4 to the rear wheel 3 are locked. A differential lock pedal 25 is provided.
A step 9 where an operator gets on and off is provided on the outer side of the cabin 6, and a fuel tank 10 for supplying fuel to the engine 4 is provided on the inner side of the step 9 and below the bottom of the cabin 6. Is provided.

The biaxial rotary shaping machine 400 is connected to the working vehicle main unit 50 (here, the rear part of the transmission case 16) via a link mechanism 300 so as to be swingable up and down.
In the present embodiment, the link mechanism 300 is a three-point link mechanism including an upper link 320 and a pair of left and right lower links 311 and 312.

The pair of left and right lower links 311 and 312 has a front end connected to the left and right side surfaces of the rear portion of the transmission case 16 via a lower link pin 313, and a rear end connected to the lower end of the hitch frame 310. The lower hitch pins 314 are connected.
The upper link 320 has a front end connected to an upper link hitch 210 at the rear of the working machine lifting mechanism 200 described below via an upper link pin 211, and a rear end connected to the front end of the upper link frame 401 below with an upper hitch pin 321. It is connected through.
Specifically, the upper link 320 is configured to be expanded and contracted by the rotation of the turnbuckle 320a so that the length of the upper link 320 can be changed and adjusted.

On the rear upper surface of the transmission case 16, a hydraulic working machine lifting mechanism 200 for lifting and lowering the biaxial rotary shaping machine 400 is detachably attached.
The hydraulic working machine lifting mechanism 200 includes a single-acting lift control hydraulic cylinder (not shown) that acts as a lift actuator, and a pair of left and right lift arms that are operatively rotated by a piston in the hydraulic cylinder. 221 and 222.

The left lift arm 221 in the traveling direction is connected to the corresponding left lower link 311 via a left lift rod 231.
The lift arm 222 on the right side in the traveling direction is connected to the corresponding lower link 312 on the right side via a right lift rod 232.
That is, in the biaxial rotary shaping machine 400, the pair of left and right lift arms 221 and 222 are swung around the rotation axis along the vehicle width direction by the lift control hydraulic cylinder, so that the upper link 320 and the The pair of lower links 311 and 312 are moved up and down around the front end portions.

The right lift rod 232 is interposed with a double-acting tilt control hydraulic cylinder 240 that acts as a tilting actuator for tilting the biaxial rotary shaping machine 400 with respect to the working vehicle main unit 50. .
That is, in the biaxial rotary shaping machine 400, the piston rod 241 of the tilt control hydraulic cylinder 240 advances and retreats, whereby the other of the pair of left and right lift rods 231 and 232 (here, the left lift rod 231) and the other Tilts with the connecting point with the lower link 311 corresponding to the lift rod 231 (ie, the position displaced from the center position in the vehicle width direction of the biaxial rotary shaping machine 400 to one side) as a fulcrum Q. Yes.

FIG. 2 is a diagram showing a biaxial rotary shaping machine 400 portion in the working vehicle 100 shown in FIG. FIG. 2A is a schematic side view of the biaxial rotary shaping machine 400, and FIG. 2B shows a state in which some members such as a cover member are removed from the biaxial rotary shaping machine 400. It is a schematic side view shown.
3 is a schematic perspective view of the biaxial rotary shaping machine 400 shown in FIG. 1 as viewed obliquely from the upper left and the rear. FIG. 4 is a schematic rear lower perspective view of the biaxial rotary shaping machine 400 shown in FIG. It is.

The biaxial rotary shaping machine 400 includes a tilling portion 410, a ground breaking portion 490 disposed on the vehicle rear side from the tilling portion 410, and a shaping portion 420 disposed on the side of the ground breaking portion. Yes.
Specifically, as shown in FIG. 1 to FIG. 4, the tilling portion 410 has the tilling shaft 411 and the tilling claws 412, and the soil breaking portion 490 has a soil breaking shaft 422 and a soil breaking member 423. The shaping unit 420 has a shaping plate 421.

  The tillage shaft 411 is operatively driven by a PTO shaft 18 provided in the working vehicle main unit 50 (here, via a transmission shaft 452 having universal joints at both ends as shown in FIG. 3). The tillage claw 412 is provided on the tillage shaft 411.

  The crushed shaft 422 is disposed on the vehicle rear side of the tillage shaft 411 and is configured to be driven by power branched from a power transmission path from the PTO shaft 18 to the tillage shaft 411. The crushed earth member 423 is provided on the crushed earth shaft 422.

Next, the ground breaking member 423 in this embodiment will be described in detail.
FIG. 5 is an enlarged view of the crushed portion 490 shown in FIG.
6 to 9 are a left side view, a right side view, a front view, and a perspective view of the crushed member 423 in this embodiment. In addition, in FIG. 9, the following auxiliary tilling nail | claw 423d is abbreviate | omitting illustration.

  As shown in FIGS. 5 to 9, the crushed member 423 includes a disk-shaped rotor 423 a that is supported by the crushed shaft 422 so as not to rotate relative to the axis, and a rotational axis around the radially outer end of the rotor 423 a. A plurality of rods 423b fixed to the rotor 423a so as to be positioned at equal intervals, each having a central portion 423b ′ fixed to the rotor 423a and rotation of the rotor 423a from the central portion 423b ′. A plurality of rods 423b each having a left rod portion (first rod portion) 423bL and a right rod portion (second rod portion) 423bR, each of which extends toward one side and the other side in the axial direction and has a free end portion 423b " And a plurality of auxiliary tilling claws 423d detachably attached to the rotor 423a.

  Here, the radially outer end portion of the rotor 423a where the left and right rod portions 423bL and 423bR are provided is the hatched region α in FIG. 6, and from the radially outermost position of the rotor 423a. It includes a predetermined peripheral area directed radially inward.

  Further, in the present embodiment, the plurality of rods 423b have a radial distance from the rotation axis of the rotor 423a over the entire area of the left and right rod portions 423bL and 423bR, respectively, with the central portion 423b ′. The free end portion 423b ″ of the left and right rod portions 423bL and 423bR has the same radial distance between the rotation axis of the rotor 423a and the rotational direction (forward rotation) of the rotor 423a from the central portion 423b ′. (Direction) In a state where it is positioned on the upstream side of A, it is symmetric with respect to the rotor 423a.

As shown in FIGS. 6 and 7, the plurality of auxiliary tilling claws 423 d are respectively connected to the rotor 423 a, for example, base ends 423 d ′ that are detachably connected via fastening members including bolts and nuts, A claw portion 423d ″ that extends radially outward from the base end portion 423d ′ with reference to the rotational axis of the rotor 423a, and the claw portion 423d ″ is located on the rotor 423a more than the plurality of rods 423b. It is located radially outward with respect to the rotational axis.
The plurality of auxiliary tilling claws 423d are attached to the rotor 423a so that the claw portions 423d ″ are positioned on the upstream side in the rotational direction A of the rotor 423a as they go from the base end side to the free end side. ing.

The ground breaking member 423 according to the present embodiment includes a plurality of rods 423b whose central portion 423b ′ is fixed to the radially outer end portion of the rotor 423a and whose distal end portion is a free end portion 423b ″. The plurality of rods 423b can be crushed in a state where a crushed area in the vehicle width direction is sufficiently secured. Further, the plurality of rods 423b have free ends 423 ″ at their tip portions. Unnecessary materials such as grass can be crushed in a state where it is difficult to get entangled.
Therefore, according to the soil breaking member 423 according to the present embodiment, it is possible to prevent as much as possible unnecessary objects such as straw and grass from being entangled while securing a sufficient ground breaking region in the vehicle width direction.
Further, since the ground breaking member 423 has a simple configuration in which the plurality of rods 423b are provided at the radially outer end of the rotor 423a, the weight of the ground breaking member 423 can be reduced, and inconvenience such as soil clogging can be achieved. It can be crushed while effectively preventing.

Further, a base end portion 423d ′ of the auxiliary tillage claw 423d is detachably connected to the rotor 423a, and the claw portion 423d ″ of the auxiliary tillage claw 423d is connected to the rotation axis of the rotor 423a from the base end portion 423d ′. The auxiliary tilling claws 423d have claw portions 423d ″ positioned radially outward with respect to the rotation axis of the rotor 423a as compared to the plurality of rods 423b. .
Accordingly, when the rotor 423a is driven to rotate around the crushing shaft 422, the claw portions 423d ″ of the auxiliary tilling claw 423d plow a layer deeper than the soil to be crushed by the plurality of rods 423b.

Thus, in addition to the plurality of rods 423b that crush the upper layer portion of the soil, by providing the auxiliary tilling claws 423d that cultivate a layer deeper than the layer that the rod 423b crushes, a wider crushed area is secured. Can do. Further, by the auxiliary tilling claws 423d are rod de 423b is tilling the deeper layers than the layer to Harrow, Harrow layers Harrow by rough raised layer and Harrow member 423 is tilling by tilling claws 412 of the tilling unit 410 and It is possible to effectively prevent a hard layer from being formed between them.
Further, since the auxiliary tilling claw 423d can be attached to and detached from the rotor 423a, it is possible to easily select whether or not to add the tilling action by the auxiliary tilling claw 423d according to the soil quality.

In the present embodiment, the rod 423b is retracted to the upstream side in the rotational direction A of the soil crushing shaft 422 as it goes from the central portion 423b ′ to the free end portion 423b ″.
In the crushed earth member 423 having such a configuration, it is possible to further prevent tangled unnecessary objects such as straw and grass from being entangled, thereby making it possible to maintain the crushed earth performance satisfactorily.
The receding angle θ (see FIGS. 8 and 9) formed by the virtual straight line β along the crushed earth axis 422 and the rod 423b is not particularly limited, but is, for example, about 20 ° to 40 °.

Further, in the present embodiment, as shown in FIGS. 6 to 8, the plurality of rods 423b are located at the lowest point around the axis of the crushed shaft 422 and are free from the center 423b ′ to the free end 423b ″. The whole is located at substantially the same position in the vertical direction (the left and right rod portions 423bL and 423bR are horizontal).
In the ground breaking member 423 having such a configuration, when the plurality of rods 423b are positioned at the lowest point around the axis of the ground breaking shaft 422, the posture is always along the horizontal direction. It can be crushed so as to be obtained.

Further, in this embodiment, as shown in FIGS. 6 and 7, a plurality of the rods 423b are provided in the rotor 423a in the circumferential direction (here, equally in the circumferential direction). The right rod portions 423bL and 423bR are configured to have different rotation radii.
That is, the plurality of rods 423b includes a plurality of first rods 423b1 having a radial distance (rotation radius) between the center portion 423b ′ and the rotation axis of the rotor 423a as a first distance r, and the center And a plurality of second rods 423b2 in which a radial distance (rotational radius) between the portion 423b ′ and the rotation axis of the rotor 423a is a second distance R longer than the first distance r.
In the present embodiment, the first rod 423b1 and the second rod 423b2 are alternately arranged around the rotation axis of the rotor 423a.

In the crushed member 423 having such a configuration, among the plurality of rods 423b to be crushed, the crushed state is different between the first rod 423b1 (rotating radius r) and the second rod 423b2 (rotating radius R> r). Therefore, the crushed soil can be crushed while preventing the crushed soil state from being pressed as much as possible.
The minimum rotation radius (first distance r) among the rotation radii of the plurality of left and right rod portions 423bL and 423bR is not particularly limited. For example, the maximum rotation radius (second distance R) is 70. % To about 80%.

Further, in the ground breaking member 423 of the present embodiment, the plurality of auxiliary tilling claws 423d are arranged at positions corresponding to the plurality of first rods 423b1, respectively, as shown in FIGS. The end 423d ′ is connected to the rotor 423a on the downstream side in the rotation direction A of the rotor 423a with respect to the corresponding first rod 423b1, and the claw portion 423d ″ corresponds to the rotation direction A of the rotor 423a. The first rod 423b1 extends from the downstream side in the rotational direction A to the upstream side with respect to the first rod 423b1 so as to straddle the first rod 423b1.

In the ground breaking member 423 having such a configuration, the auxiliary tilling claw 423d is connected to the rotor 423a at a position where the base end portion 423d ′ corresponds to the first rod 423b1 having a shorter turning radius.
At this time, the claw portion 423d ″ of the auxiliary tillage claw 423d is configured so that the rotation direction A of the rotor 423a is based on the first rod 423b1 so as to straddle the corresponding first rod 423b1 with respect to the rotation direction A of the rotor 423a. extends from the downstream side to the upstream side. that is, the tip portion of the claw portion 423d "is located on the upstream side in the rotation direction a of the corresponding rotor 423a from the tip portion of the first rod 423B1, the pawl portion The base end portion of 423d ″ is located on the downstream side in the rotational direction A of the rotor 423a from the central portion 423b ′ of the corresponding first rod 423b1.

Accordingly, the base end portion 423d ′ of the auxiliary tillage claw 423d is connected to the rotor 423a at a position corresponding to the first rod 423b1 having a shorter radial distance between the central portion 423b ′ of the rod 423b and the rotation axis of the rotor 423a. Thereby, the connection space of the auxiliary tillage nail | claw 423d can be ensured easily.
Further, at the position corresponding to the second rod 423b2, instead of connecting the auxiliary tilling claw 423d, the length of the claw portion 423d ″ of the auxiliary tilling claw 423d is made longer than the length of the left and right rod portions 423bL, 423bR. The tilling effect can be kept high while reducing the number of auxiliary tilling claws 423d attached.

  In the present embodiment, as shown in FIGS. 6 to 8, the plurality of auxiliary tilling claws 423d include a left side surface on the one side in the rotation axis direction of the rotor 423a (see the first side surface, FIG. 6) and a right side on the other side. Left auxiliary tilling claws including left auxiliary tilling claws (first auxiliary tilling claws) 423dL and right auxiliary tilling claws (second auxiliary tilling claws) 423dR respectively connected to the surface (second side surface, see FIG. 7) 423dL and 423dR are alternately arranged around the rotation axis of the rotor 423a.

In this case, the left auxiliary tilling claw 423dL connected to the left side surface on one side in the rotation axis direction of the rotor 423a and the right auxiliary tilling claw 423dR connected to the right side surface on the other side in the rotation axis direction of the rotor 423a Alternatingly arranged around the rotation axis.
Accordingly, even when the moment around the rotation axis of the rotor 423a is increased by connecting the auxiliary tilling claw 423d to the rotor 423a, the auxiliary tilling claws 423d are evenly arranged on both side surfaces of the rotor 423a to rotate when the rotor 423a rotates. Shake can be suppressed.

Further, as shown in FIGS. 5 and 8, the auxiliary tilling claw 423d is separated from the rotor 423a with respect to the rotation axis direction of the rotor 423a as the claw portion 423d ″ goes from the base end side to the free end side. It is considered to be a nail.
In the present embodiment, the left (first) auxiliary tilling claw 423dL connected to the first side surface (left side surface) of the rotor 423a has a free end on one side (left side) in the rotation axis direction from the rotor 423a. The right (second) auxiliary tilling claw 423dR that is located and connected to the second side surface (right side surface) of the rotor 423a is positioned at the other end (right side) in the rotational axis direction of the rotor 423a. ing.

In addition, the auxiliary tilling claw 423d is closer to the rotor 423a on the free end side than the free end 423b ″ of the rod 423b with respect to the rotational axis direction position of the rotor 423a.
That is, as shown in FIG. 8, the auxiliary tilling claw 423 d is located in the crushed soil area B where the auxiliary tilling area b defined by the rotation trajectory of the auxiliary tilling claw 423 d in the vehicle width direction is defined by the rotation trajectory of the rod. It is comprised so that it may be located in.

  In the ground breaking member 423 having such a configuration, the claw portion 423d ″ of the auxiliary tillage claw 423d is positioned on the upstream side in the rotation direction A of the rotor 423a as it goes from the base end side to the free end side. It is possible to effectively prevent the claw 423d from being entangled with unnecessary objects such as cocoons and grass. Moreover, the rotation axis of the rotor as the claw portion 423d ″ of the auxiliary tillage claw 423d moves from the base end side to the free end side. By using the claw formed so as to be away from the rotor 423a with respect to the direction, a layer deeper than the layer where the rod 423b is crushed can be widely cultivated compared to the case where a straight blade is used. The formation of a hard layer between the roughened layer cultivated by the tilling claws 412 and the crushed soil layer crushed by the crushed member 423 is effectively prevented. Door can be.

In this embodiment, the crushed member 423 is fixed to the crushed shaft 422 so that the position in the axial direction can be adjusted.
FIG. 10 is a view showing the vicinity of the boss portion in the crushed portion 490 of the present embodiment.

In the present embodiment, as shown in FIGS. 5 and 10, the crushed shaft 422 has a plurality of mounting holes (here, substantially in the axial direction) provided at a predetermined pitch P1 (see FIG. 10) along the axial direction. A plurality of mounting holes 422a penetrating in the orthogonal direction.
The crushed member 423 is further provided with a boss portion 423c that is extrapolated to the crushed shaft 422 and to which a radially inner end portion of the rotor 423a is fixed.
The boss portion 423c is provided with a positioning hole 423c ′ (here, a positioning hole penetrating in a direction substantially orthogonal to the axial direction), whereby the crushed member 423 is inserted into the positioning hole 423c ′. A fixing member 422a ′ such as an attachment pin to be inserted is attached to any one of the plurality of attachment holes 422a, thereby being positioned and fixed to the crushed shaft 422.

  Thus, in this embodiment, since the said crushed member 423 is being fixed with respect to the said crushed shaft 422 so that axial position adjustment is possible, a crushed area can be adjusted regarding a vehicle width direction, and this is required. This makes it possible to break up the soil in the most part.

Moreover, in this embodiment, as shown in FIG. 5, the said crushing member 423 is made into the thing (here 4 pieces) made into a different body mutually, and the said some crushing members 423 are the said crushing materials, respectively. It is fixed to the shaft 422 so that the position in the axial direction can be adjusted.
According to such a configuration, in the vehicle width direction, the areas crushed by the plurality of crushed members 423 can be made different according to the planting areas.
Moreover, even when the width of the crushing crush is changed, by changing the distance d (see FIG. 5) between the adjacent crushing members 423 without preparing a crushing member having a dedicated width corresponding to the width of the crushing , It can correspond to the width of the desired ridge.

In the present embodiment, as shown in FIG. 9, the boss portion 423c has a plurality of positioning holes displaced in the axial direction and the circumferential direction (here, the axial direction so as to be displaced in the axial direction and the circumferential direction). ) 423c ′ are provided in the two positioning holes penetrating in a direction substantially orthogonal to the two.
The pitch P2 in the axial direction of the plurality of positioning holes 423c ′ is narrower than the predetermined pitch P1.
According to this configuration, when attaching the plurality of soil breaking members 423 to the soil breaking shaft 422, the mounting holes 422a of the predetermined pitch P1 in the soil breaking shaft 422 and the boss portions 423c of the soil breaking member 423 are formed. By aligning any one of the plurality of positioning holes 423c ′, the plurality of crushed members 423 can be finely adjusted within the predetermined pitch P1 in the axial direction.

In addition, the said crushing shaft 422 and the said boss | hub part 423c are made into the cylindrical thing here.
In the present embodiment, the rotor 423a is plate-shaped as shown in FIGS. However, the present invention is not limited to this, and a spoke-like thing provided so as to extend radially outward with respect to the crushed earth shaft 422 may be used.
The crushed member 423 may appropriately increase or decrease the number of the left and right rod portions 423bL and 423bR.

Here, FIG. 11 shows a schematic diagram of a series of operations in which the biaxial rotary shaping machine 400 of FIG. 1 plows, shapes, and crushes the soil G.
In this embodiment, the shaping plate 421 of the shaping unit 420 is configured to shape the soil G ′ cultivated by the cultivating unit 410 into a cocoon shape as shown in FIGS. 2 to 4 and 11. Yes.
The crushed shaft 422 of the crushed portion 490 is operatively driven by the power from the PTO shaft 18, and the crushed member 423 rotates together with the crushed shaft 422, so that the crushed shape is shaped by the shaping plate 421. Crush the top T of F.

In the biaxial rotary shaping machine 400, as shown in FIG. 11, the soil G is roughly cultivated by the tillage unit 410, and the soil G ′ roughly cultivated by the tillage unit 410 is formed into a cocoon shape by the shaping plate 421. Further, the upper part T of the rough soil ridge F shaped by the shaping plate 421 of the shaping part 420 is further finely crushed by the earth breaking member 423 provided on the earth breaking shaft 422 of the earth breaking part 490. it can.
Thus, according to the biaxial rotary shaping machine 400, the soil G ′ coarsely cultivated by the tillage unit 410 is shaped into a cocoon shape by the shaping unit 420, and the coarse soil shaped by the shaping unit 420 is also shaped. Since the upper part T of the cocoon F can be crushed more finely by the crushed earth part 490, it becomes possible to form the cocoon in which the upper surface part which becomes the planting region is crushed more finely in one step.

In the present embodiment, as shown in FIGS. 2B and 11, the biaxial rotary shaping machine 400 has at least a part of the rotation locus K1 of the crushed member 423 over the shaping plate 421 in a side view. It is configured to wrap.
By having such a configuration, the biaxial rotary shaping machine 400 shapes the coarse earth G ′ with the shaping plate 421 and simultaneously finely breaks the upper part T of the shaped earth F with the earth breaking member 423. Can do. Therefore, since the upper portion T of the heel F can be crushed more finely by the crushed member 423 in the state where the rough soil ridge F is shaped by the shaping plate 421, only the upper surface portion which is the planting region of the heel F is provided. The crushed soil can be effectively crushed, thereby making it possible to obtain cocoons suitable for, for example, sowing and transplanting.

In the present embodiment, the crushed earth shaft 422 is driven by power branched from a power transmission path from the PTO shaft 18 to the tilling shaft 411.
FIG. 12 is a schematic right rear perspective view of the power take-out mechanism and the ground breaking power transmission mechanism portion of the biaxial rotary shaping machine 400.
As shown in FIG. 12, in addition to the crushed shaft 422 and the crushed member 423, the crushed portion 490 includes a power take-out mechanism 430, a crushed transmission mechanism 440, and a crushed transmission mechanism 440. A power transmission case 450, and the power take-out mechanism 430 is configured to take out rotational power from a power transmission path from the PTO shaft 18 to the tilling shaft 411.

Specifically, the ground breaking power transmission mechanism 440 includes an input unit 441 operatively connected to the power take-out mechanism 430 and an output unit 442 positioned below the input unit 441 (see FIG. 4).
Further, as shown in FIG. 4, the earth breaking shaft 422 is supported by the earth breaking transmission case 450 while being operatively connected to the output portion 442, and the earth breaking member 423 is provided on the earth breaking shaft 422. It has been.
As shown in FIG. 11, the crushed earth transmission case 450 is supported by the tilling portion 410 so as to be swingable around the input portion 441.

FIG. 15 is a perspective view of the crushed earth transmission case 450 supported from the tillage unit 410 so as to be swingable about the input unit 441 from the upper left side.
In the present embodiment, as shown in FIG. 15, the groundbreaking transmission case 450 is swingable around the input shaft 443 in the input portion 441 and can be adjusted in position on a fixed support member 410 a provided in the tillage portion 410. It is supported.
Specifically, the fixed support member 410a is provided with long holes (here, two long holes) 410b along the circumferential direction around the input shaft 443.
The crushed earth transmission case 450 is swingable up and down around the input shaft 443, and by a fixing member 410c such as a bolt inserted into the elongated hole 410b provided in the fixing support member 410a. Within the range of the length of the long hole 410b, the position around the input shaft 443 is fixed so as to be adjustable.

By providing such a configuration, the rock breaking layer S is crushed more finely in the upper part T of the coarse soil ridge F shaped by the shaping plate 421 in order to swing around the input portion 441 of the transmission case 450 for the crushed earth. The depth h can be adjusted.
That is, when the crushed transmission case 450 is swung downward around the input portion 441, the depth h1 of the crushed soil layer S1 is swung upward around the input portion 441 (for example, FIG. 11). It can be adjusted to be deeper than the depth h2 of the crushed soil layer S2.
Thereby, the ridge F which has the crushed soil layer S of the depth h suitable for the crop to plant can be obtained.

The biaxial rotary shaping machine 400 will be described more specifically with reference to FIGS.
In FIG. 13, the expanded sectional view of the power transmission mechanism part for tillage of the said tillage part 410 is shown.
In addition to the tilling shaft 411 and the tilling claw 412, the tilling unit 410 includes an input shaft 413, a gear case 414, a driven shaft 415, a main beam 416, a tilling transmission case 417, and a tilling transmission mechanism 418. And.

In the present embodiment, the tiller 410 includes a pair of left and right driven shafts 415, the main beam 416, the tillage transmission case 417, the tillage transmission mechanism 418, and the tillage shaft 411.
In such a configuration, for example, the power from the input shaft 413 can be transmitted to the tilling shaft 411 at both outer ends in the vehicle width direction.
In FIG. 13, one (right side) of the pair of configurations is shown, but the other configuration is that a first transmission pulley 431 described later of the power take-out mechanism 430 is not provided. Except for this, it has substantially the same configuration as the one configuration.

The input shaft 413 is configured to be operatively connected to the PTO shaft 18.
Specifically, the input shaft 413 is configured to be operatively connected to the PTO shaft 18 via the transmission shaft 452, and the power from the engine 4 is transmitted via the PTO shaft 18 and the transmission shaft 452. Is transmitted.

The gear case 414 supports the input shaft 413 along the longitudinal direction of the vehicle, and the driven shaft 415 extends along the vehicle width direction while being operatively connected to the input shaft 413.
Specifically, the driven shaft 415 extends left and right across the input shaft 413, and the power is transmitted from the input shaft 413 through the drive transmission mechanism 350 so that the power is transmitted from the input shaft 413. The input shaft 413 is operatively connected.

Specifically, the driven shaft 415 is integrally connected coaxially, and the drive transmission mechanism 350 includes first and second bevel gears 351 and 352 accommodated in the gear case 414.
The gear case 414 supports the input shaft 413 so as to be rotatable about the axis, and supports the driven shaft 415 disposed so as to be orthogonal to the input shaft 413 so as to be rotatable about the axis.
The first bevel gear 351 is externally fitted and fixed to the input shaft 413 while being accommodated in the gear case 414. The second bevel gear 352 is externally fitted and fixed to one of the pair of left and right driven shafts 415 so as to mesh with the first bevel gear 351 while being accommodated in the gear case 414.

The main beam 416 is coupled to both sides of the gear case 414 in the vehicle width direction so as to rotatably support the driven shaft 415 about its axis, and the tillage transmission case 417 extends in the vertical direction. The main beam 416 is connected to the outer end in the vehicle width direction.
Specifically, the main beam 416 is disposed so as to connect a side surface of the gear case 414 and an upper end portion of the tillage transmission case 417, and the driven shaft 415 is inserted therein.

In the present embodiment, the main beam 416 and the driven shaft 415 can be expanded and contracted in the vehicle width direction.
In this way, the tilling portion 410 can adjust the tilling width by extending and contracting the main beam 416 and the driven shaft 415 in the vehicle width direction.

Specifically, the driven shaft 415 has a position-fixed driven shaft 415a that is operatively connected to the input shaft 413 in a state where the position in the axial direction is fixed, and an axis that is axially movable with respect to the position-fixed driven shaft 415a. It has a position movable driven shaft 415b connected so as not to be relatively rotatable.
Specifically, the position movable driven shaft 415b has a cylindrical member 415b ′, and the inner end of the cylindrical member 415b ′ in the vehicle width direction is the outer end of the position fixed driven shaft 415a in the vehicle width direction. It is externally fitted to the part so as to be slidable in the vehicle width direction and not rotatable relative to the axis.

The main beam 416 includes a fixed beam 416a that supports the fixed position driven shaft 415a and a movable beam 416b that is connected to the fixed beam 416a so as to be movable in the axial direction.
Specifically, the fixed beam 416a is a hollow member (for example, a horizontally long cylindrical member) in which the position fixed driven shaft 415a can be inserted and the movable beam 416b can be fitted, and the movable beam 416b. Is a hollow member (for example, a horizontally long cylindrical member) in which the position movable driven shaft 415b can be inserted.
The movable beam 416b is slidably fitted in the vehicle width direction outer end portion of the fixed beam 416a in a state where the position movable driven shaft 415b is inserted, and a fixed member BL (for example, , And fixing bolts).

  In the tillage transmission case 417, the bearing portion 417a at the upper end portion supports the other end portion side of the driven shaft 415 so as to be rotatable about the axis, and the bearing portion 417b at the lower end portion is on one end portion side of the tillage shaft 411. Is supported so that it can rotate around its axis.

The tillage transmission mechanism 418 is accommodated in the tillage transmission case 417 and is operatively connected to an outer end portion of the driven shaft 415 in the vehicle width direction and an output positioned below the input portion 418a. Part 418b.
Specifically, the tilling shaft 411 is configured to be driven by the tillage transmission mechanism 418. That is, the tilling shaft 411 is operatively connected to the driven shaft 415 via the tillage transmission mechanism 418 so that the power from the driven shaft 415 is transmitted by the tilling transmission mechanism 418.

Specifically, the tillage transmission mechanism 418 includes first and second sprockets 418c and 418d and a chain 418e.
The first sprocket 418c is externally fitted and fixed to the other end of the driven shaft 415, and the second sprocket 418d is externally fixed to the one end of the tilling shaft 411. The chain 418e is wound around the first and second sprockets 418c and 418d.

The tillage claw 412 is provided on the tillage shaft 411 so as not to rotate relative to the axis.
Further, the tilling shaft 411 is supported by the tilling transmission case 417 so as to extend along the vehicle width direction while being operatively connected to the output portion 418b.

  In this embodiment, the tillage unit 410 includes the driven shaft 415, the main beam 416, the tillage transmission case 417, the tillage transmission mechanism 418, and the tillage shaft 411. Since it is necessary to cultivate with the entire width of the cultivating section, as shown in FIGS. 4 and 12, the inner ends of the cultivating shaft 411 are relative to each other via a coupling member 470 such as a coupling having a cultivating claw 412. Non-rotatably connected.

Here, the tilling shaft 411 is connected to each other through the connecting member 470 so as to be movable in the vehicle width direction. Accordingly, the pair of left and right tillage shafts 411 can move in the vehicle width direction as the main beam 416 and the driven shaft 415 extend and contract in the vehicle width direction, respectively.
Specifically, the pair of right and left tilling shafts 411 are fitted so that the inner end portion 411a in the vehicle width direction is slidable in the vehicle width direction so as to be slidable in the vehicle width direction and not rotatable relative to the axis. ing. Preferably, the tilling shaft 411 and the connecting member 470 are fixed by a fixing member BL (for example, a fixing bolt). Further, the tilling claws 412 are provided on the connecting member 470.

In the present embodiment, the power from the input shaft 413 is transmitted to the tilling shaft 411 at both outer end portions in the vehicle width direction. It is also possible to support a single tilling shaft by means of the bearing plate.
In this embodiment, for example, a side drive rotary type that transmits power from the input shaft 413 to a single tillage shaft at one outer end in the vehicle width direction, or power from the input shaft 413 is transmitted to the vehicle width. It can be configured as a center drive rotary type that transmits to a single tilling shaft at the center in the direction.

In the present embodiment, as shown in FIGS. 1 to 4, the tilling unit 410 includes a tilling cover 419, a tilling depth adjusting frame 461, a gauge ring frame 462, and a gauge ring arm 463, in addition to the above-described configuration. , A gauge ring 464 and a tilling depth adjusting shaft 465 are provided.
Here, the upper link frame 401 is fixed to the gear case 414 by a fixing member 402 such as a bolt.
The tillage cover 419 includes a tilling upper surface cover 419a disposed so as to cover the rotation trajectory K2 of the tilling claw 412 and a pair of left and right tilling side covers provided at both ends of the tilling upper surface cover 419a in the vehicle width direction. 419b.

The tilling depth adjusting frame 461 has a front end attached to the main beam 416 and extends rearward. The gauge ring frame 462 extends in the vehicle width direction and is connected to the frame body (here, the upper link frame 401) of the biaxial rotary shaping machine 400 through the tilling depth adjustment frame 461 so that the position can be adjusted. Has been.
The gauge wheel arm 463 is supported by the gauge wheel frame 462 so as to extend in the vertical direction, and the gauge wheel 464 is supported by the gauge wheel arm 463 so as to be rotatable about an axis along the vehicle width direction. Yes.
Further, the tilling depth adjusting shaft 465 is adjustable to extend and contract between the rear end side of the upper link frame 401 and the gauge ring frame 462, and the tilling depth adjusting is rotated to perform the expanding and contracting adjustment. A handle 465a (see FIG. 1 and the like) is provided.

  The tilling unit 410 having such a configuration is configured such that the tilling depth adjusting handle 465a is rotated, the tilling depth adjusting shaft 465 is expanded and contracted, and the gauge ring 464 is moved up and down, whereby the biaxial rotary shaping machine 400 as a whole. As a result, the plowing depth g1 (that is, the height g2 of the hail F) by the tilling claws 412 can be manually changed.

In the crushed portion 490, the power take-out mechanism 430 is configured to take out rotational power from the position-fixed driven shaft 415a in a transmission path from the PTO shaft 18 to the tilling shaft 411 as shown in FIG. Has been.
Specifically, the power take-out mechanism 430 includes first and second transmission pulleys 431 and 432 and a transmission belt 433.
The first transmission pulley 431 is supported on the position-fixed driven shaft 415a so as not to rotate relative to the axis, and the second transmission pulley 432 is axially connected to the soil-crushing input shaft 443 described later in the soil-crushing transmission mechanism 440. It is supported so that it cannot rotate relative to each other. The transmission belt 433 is wound around the first and second transmission pulleys 431 and 432. The transmission belt 433 is stretched by a tension roller 435 biased by a biasing member 434.

In the power take-out mechanism 430 having such a configuration, the rotational power from the position-fixed driven shaft 415a is transmitted to the crushed soil input shaft 443.
In this embodiment, the position-fixed driven shaft 415a includes a tubular member 415a ′ and a pulley shaft 415a ″ provided with the first transmission pulley 431, and the cylindrical member 415b ′ An outer end portion in the vehicle width direction is fitted on the pulley shaft 415a ′ and is fixed by a fixing member BL (for example, a fixing bolt).

FIG. 14 is a schematic configuration diagram of the crushed earth transmission case 450 that houses the crushed earth transmission mechanism 440. FIG. 14A is a longitudinal sectional view, and FIG. 14B is a side view.
As shown in FIG. 14, the crushed soil transmission mechanism 440 includes a crushed soil input shaft 443, first and second transmission sprockets 444 and 445, and a transmission chain 446.
The crushed soil input shaft 443 is disposed substantially parallel to the position-fixed driven shaft 415a, and is supported on the upper end side of the crushed soil transmission case 450 so as to be relatively rotatable about an axis.
The first transmission sprocket 444 is supported on the crushed input shaft 443 so as not to rotate relative to the axis, and the second transmission sprocket 445 cannot be rotated relative to the crushed shaft 422 around the axis at the output portion 442. It is supported. The transmission chain 446 is wound around the first and second transmission sprockets 444 and 445.

  Further, in the present embodiment, the ground breaking transmission case 450 accommodates the ground breaking transmission mechanism 440 so as to be swingable around the ground breaking input shaft 443, and the ground breaking transmission mechanism 440 is configured to transmit the ground breaking transmission mechanism 440. In a state in which the case 450 can swing around the crushed soil input shaft 443, the rotational power from the crushed soil input shaft 443 is transmitted to the crushed soil shaft 422.

As shown in FIGS. 1 to 4, the shaping unit 420 includes a shaping frame 424 that supports the shaping plate 421 in addition to the shaping plate 421.
In this embodiment, the shaping frame 424 includes a support arm 424a supported by the tillage unit 410, a tool bar 424b supported by the support arm 424a so as to extend in the vehicle width direction, and a vehicle width direction of the tool bar 424b. A pair of left and right column frames 424c are supported at both ends so as to be adjustable in position in the vehicle width direction.
Specifically, the support arm 424a has a front end attached to the vehicle rear side of the main beam 416 at the center in the vehicle width direction of the support beam 416e disposed substantially parallel to the main beam 416, and a rear end. The tool bar 424b is integrally connected to the center in the vehicle width direction.

The shaping plate 421 is a pair of left and right columns supported by the pair of left and right column frames 424c, and the position of the pair of left and right column frames 424c is adjusted in the vehicle width direction with respect to the tool bar 424b. The width of the ridge F to be shaped can be adjusted.
In the present embodiment, the pair of left and right shaping plates 421 move the cultivation soil inwardly facing the tilling claws 412 at the rear of the vehicle at the outer end of the tilling shaft 411 provided with the tilling claws 412. A first shaping portion 421a for extending the first shaping portion 421a and a second forming portion 421b extending from the inner end portion in the vehicle width direction of the first shaping portion 421a so that the upper end portion is inclined inward from the lower end portion. Have.

Specifically, the pair of shaping plates 421 are respectively connected to the pair of column frames 424c via connection members 421c. Each of the connecting members 421c is inserted into a box-shaped portion provided at a lower end portion of the pair of column frames 424c, and is fixed by a fixing member such as a bolt.
Further, a soil adhesion preventing plate 421b ′ such as a plastic plate is provided on the inner surface of the second forming portion 421b.

In addition to the above-described configuration, the shaping unit 420 covers the rear surface of the shaping front part upper surface cover 425 disposed so as to cover the rotation locus K1 of the crushed member 423 and the rotation locus K1 of the crushed member 423. And a shaping rear upper surface cover 426 (see FIG. 3).
In the present embodiment, the shaping front upper surface cover 425 has a rear end portion 425a integrally connected to the tool bar 424b, and a front end portion 425b is disposed on the upper surface of the tilling upper surface cover 419a.
The shaped rear upper cover 426 is rotatably connected to the tool bar 424b via a pivot shaft 424b ′ provided along the vehicle width direction.

Further, a soil adhesion preventing plate 426b ′ such as a plastic plate is provided on the inner surface of the shaping rear upper surface cover 426.
The soil adhesion preventing plate 426b ′ is arranged such that when the pair of left and right strut frames 424c are adjusted in the vehicle width direction with respect to the tool bar 424b, the shaping rear upper surface cover 426, the second shaping portion 421b, It is possible to advance and retreat in the vehicle width direction so as to cover the upper part of the rotation trajectory K1 of the crushed member 423. Here, the soil adhesion preventing plate 426b ′ is a pair of extension plates 426b ″ provided at both ends in the vehicle width direction, and has a pair of extension plates 426b ″ having elongated holes M extending in the vehicle width direction. ing. The extension plates 426b "are attached to both ends in the vehicle width direction so as to be position adjustable along the vehicle width direction by fixing members such as bolts inserted through the elongated holes M. Thereby, the soil adhesion is performed. The prevention plate 426b ′ can advance and retreat in the vehicle width direction.

Further, as shown in FIG. 3, a pair of left and right hanger frames 427 extending rearward is extended in the center of the toolbar 424b in the vehicle width direction.
A pair of left and right hanger mechanisms 480 are provided between the rear upper surface side of the shaped rear upper surface cover 426 and the left and right hanger frames 427, and the shaped rear upper surface cover 426 passes through the hanger mechanism 480. Thus, it can move up and down around the pivot shaft 424b '.

Specifically, each hanger frame 427 is provided with a pressure receiving shaft body 427a that is rotatable about an axis along the vehicle width direction. The pressure receiving shaft body 427a is provided with a through hole in a direction orthogonal to the axis.
Each hanger mechanism 480 includes a hanger rod 481 and a pressure biasing member (here, a compression spring) 482.

The hanger rod 481 has an elongated round bar shape that is slidably inserted into the through hole of the pressure receiving shaft body 427a, and a lower end portion of the hanger rod 481 via a support shaft 481a along the vehicle width direction. The shaping rear upper surface cover 426 is rotatably connected to a bracket 426a provided on the rear upper surface, and has a support member 481b fixed on the lower side and on the upper side of the support shaft 481a. .
The pressure biasing member 482 is externally inserted into the hanger rod 481 so as to be positioned between the support member 481 b and the hanger frame 427.

In the present embodiment, the shaping unit 420 includes a rake 428 that embeds rice straw or a stump in the soil, as shown in FIGS. The rake 428 includes a plate-like base portion 428a fixed to the toolbar 424b and a plurality of rake portions 428b arranged in series along the vehicle width direction, and a base end portion is fixed to the base portion 428a. The free end portion has a plurality of rake portions 428b facing substantially downward.
The rake 428 of the present embodiment is arranged such that, of the plurality of rake portions 428b, the free end portions of the adjacent rake portions 428b are staggered in the front-rear direction of the vehicle during work (working machine lowered state). ing. That is, the rake 428 includes a first rake portion 428b1 having a free end portion positioned forward and a second rake portion 428b2 having a free end portion positioned rearward of the free end portion of the first rake portion 428b1. Are arranged alternately.

  By having such a configuration, it is possible to prevent the rice straw, stumps, and the like from being caught on the rake portion 428b, or soil being collected on the rake portion 428b, and scraping the upper surface of the straw.

As mentioned above, although one embodiment concerning the present invention was described, the present invention is not limited to the above-mentioned embodiment, and various improvement, change, and correction are possible within the range which does not deviate from the meaning.
For example, in the above-described embodiment, the biaxial rotary shaping machine 400 in which the working vehicle main body 50 is provided with the tilling part 410, the shaping part 490, and the earth breaking part 490 has been described, but the earth breaking member 423 according to the present invention is a work The present invention can be applied to any biaxial rotary tiller having a tiller 410 and a crushed soil 490 in the vehicle main unit 50.

FIG. 1 is a schematic side view of a working vehicle provided with a biaxial rotary shaping machine to which a crushed member according to an embodiment of the present invention is applied. FIG. 2 is a view showing a biaxial rotary shaping machine portion in the working vehicle shown in FIG. FIG. 3 is a schematic perspective view of the biaxial rotary shaping machine shown in FIG. FIG. 4 is a schematic rear lower perspective view of the biaxial rotary shaping machine shown in FIG. 1. FIG. 5 is an enlarged view of the crushed portion shown in FIG. FIG. 6 is a left side view of the crushed member in the present embodiment. FIG. 7 is a right side view of the crushed member in the present embodiment. FIG. 8 is a front view of the crushed member in the present embodiment. FIG. 9 is a perspective view of a crushed member in the present embodiment. FIG. 10 is a view showing the vicinity of the boss portion in the crushed portion of the present embodiment. FIG. 11 is a schematic diagram of a series of operations in which the biaxial rotary shaping machine in FIG. 1 plows, shapes, and crushes the soil. FIG. 12 is a schematic right rear perspective view of a power take-out mechanism and a crushed earth transmission mechanism portion of the biaxial rotary shaping machine of FIG. FIG. 13 is a developed cross-sectional view of the power transmission mechanism portion for tillage of the tillage portion in the present embodiment. FIG. 14 is a schematic configuration diagram of a crushed earth transmission case that houses the crushed earth transmission mechanism in the present embodiment. FIG. 15 is a perspective view of a state in which the transmission case for crushed soil according to the present embodiment is supported by the tillage portion so as to be swingable around the input portion, as viewed from the upper left side.

Explanation of symbols

18 PTO shaft 50 Work vehicle main unit 422 Crushing shaft 423 Crushing member 423a Rotor 423b Rod 423b1 First rod 423b2 Second rod 423bL Left rod portion (first rod portion)
423bR Right rod part (second rod part)
423b 'Rod center part 423b "Rod free end 423d Auxiliary tillage claw 423dL Left auxiliary tillage claw (first auxiliary tillage claw)
423dR Right auxiliary tilling nail (second auxiliary tilling nail)
423d ′ Auxiliary tilling claw base 423d ″ Auxiliary tilling claw r First distance R Second distance

Claims (5)

Mounted along the vehicle width direction of the work vehicle main unit and mounted on the crushed shaft, which is rotatively driven around the axis line by the rotational power from the PTO shaft provided in the work vehicle main unit so as not to be relatively rotatable. In the crushed soil member,
A disc-shaped rotor supported on the crushed earth shaft so as not to rotate relative to the axis, and
A plurality of rods fixed to the rotor, each of which has a central portion fixed to the rotor, and a distal end portion extending from the central portion to one side and the other side in the rotation axis direction of the rotor. A plurality of rods having a first rod part and a second rod part,
An auxiliary tilling claw detachably attached to the rotor,
The auxiliary tilling claw includes a base end portion that is detachably connected to the rotor, and a claw portion that extends radially outward from the base end portion with respect to a rotation axis of the rotor, and the claw portion Is located on the outer side in the radial direction with respect to the rotation axis of the rotor than the plurality of rods. Each of the plurality of rods has a radial distance between the rotation axis of the rotor and the rotation axis of the rotor across the entire area of the first and second rod portions. And is symmetrical with respect to the rotor in a state where the tip portions of the first and second rod portions are located upstream of the central portion in the rotational direction of the rotor,
2. The crushed soil according to claim 1, wherein the auxiliary tilling claw is attached to the rotor such that the claw portion is positioned on the upstream side in the rotation direction of the rotor as the claw portion moves from the base end side to the free end side. Element.   The said auxiliary tilling nail | claw is used as the nail | claw which is spaced apart from the said rotor regarding the rotating shaft direction of the said rotor as the said nail | claw part goes to a free end side from a base end side. Crushed material. The plurality of rods include a plurality of first rods having a first radial distance between the central portion and the rotational axis of the rotor, and a diameter between the central portion and the rotational axis of the rotor. A plurality of second rods whose directional distance is a second distance longer than the first distance,
The crushed member comprises a plurality of auxiliary tilling claws arranged at positions corresponding to the plurality of first rods, respectively.
Each of the plurality of auxiliary tilling claws is connected to the rotor on the downstream side in the rotation direction of the rotor with respect to the first rod to which the base end portion corresponds, and the claw portion corresponds to the rotation direction of the rotor. Harrow member according to claim 2 or 3, characterized in that extends upstream from the low data rotation direction downstream side of the first rod so as to straddle the first rod.
The plurality of auxiliary tilling claws include first auxiliary tilling claws and second auxiliary tilling claws respectively connected to the first side surface on the one side in the rotation axis direction of the rotor and the second side surface on the other side.
The ground breaking member according to claim 4, wherein the first and second auxiliary tilling claws are alternately arranged around the rotation axis of the rotor.

Images