JP4557937B2 - 2-axis rotary tiller - Google Patents

Description

  The present invention relates to a biaxial rotary tiller attached to a work vehicle such as a tractor.

2. Description of the Related Art A biaxial rotary tiller including a tilling shaft disposed along the vehicle width direction and a soil breaking shaft disposed along the vehicle front-rear direction on the vehicle rear side from the tilling shaft has been widely used. (For example, refer to Patent Document 1 below).
Specifically, the biaxial rotary tiller described in the patent document includes the tilling shaft, a tilling claw provided on the tilling shaft, the crushing shaft, and a crushing claw provided on the crushing shaft. In addition, by crushing the soil that has been devastated by the tilling claws with the crushing claw, the upper surface layer serving as a planting region can be used as a crushing layer.

By the way, it should Harrow regions of Shido about the vehicle width direction, and, is how the depth of the Harrow area varies depending on the planting work.
However, in the conventional biaxial rotary tiller, sufficient consideration has not been made with respect to this viewpoint.
Japanese Unexamined Patent Publication No. 60-19406

The present invention has been made in view of the prior art, and is a biaxial rotary cultivator having a tilling shaft and a crushed shaft, wherein the crushed region can be adjusted with respect to the vehicle width direction and depth . Providing is one purpose.

For the present invention to achieve the above object, a tilling unit including a tilling claw provided on the tilling shaft and the cultivating shaft is operatively driven by the PTO shaft provided in the working vehicle the machine, by the tilling unit fairing for shaping the plow soils in ridge shape, and a shaping section comprising Harrow member provided in Harrow shaft and the Harrow shaft disposed to the vehicle rear side of the cultivating shaft, roughened by the tilling claws A biaxial rotary tiller that finely pulverizes the upper part of the rough soil cultivated and shaped by the shaping plate with the crushed member , wherein the cultivating section includes an input shaft operatively connected to the PTO shaft and the input shaft A gear case that supports the input shaft along the longitudinal direction of the vehicle, and a slave that is supported by the gear case along the vehicle width direction while being operatively connected to the input shaft via a drive transmission mechanism in the gear case. The power transmission case for cultivating the driven shaft for supporting the cultivated shaft so as to support the driven shaft on the shaft and the upper end side, and supporting the cultivated shaft along the vehicle width direction on the lower end side, and the driven shaft and the cultivated shaft. A plowing transmission mechanism housed in a case, and the shaping portion supports the crushed input shaft so as to be substantially parallel to the driven shaft on the crushed input shaft and the upper end side, and a vehicle on the lower end side. A transmission mechanism for crushed soil that supports the crushed soil shaft along the width direction, the input shaft for crushed soil, and a transmission mechanism for crushed soil accommodated in the crushed soil transmission case so as to operatively connect the crushed soil shaft, and the driven shaft, A power take-off mechanism for operatively connecting the input shaft for crushed soil, the transmission case for crushed soil is fixed to the tillage portion so that the position around the input shaft for crushed soil can be adjusted, and the crushed member is attached to the crushed shaft. Against Providing biaxial rotary tiller, characterized in that it is axially adjustable in position fixing.

Preferably, the tillage part has a fixed support member to which the transmission case for crushed soil is connected, and the fixed support member is provided with a long hole along a circumferential direction around the input shaft for crushed soil. The transmission case can be fixed to the fixed support member by a fixing member inserted through the long hole so that the position around the input shaft for crushed soil can be adjusted within the range of the long hole.

Preferably, the power take-out mechanism includes a first transmission pulley supported on the driven shaft so as not to rotate relative to the driven shaft, a second transmission pulley supported on the input shaft for crushed soil so as not to rotate relative thereto, and the first and second transmissions. A transmission belt wound around a pulley and a tension roller that applies tension to the transmission belt by the urging force of the urging member may be included.

  The biaxial rotary tiller according to the present invention may include a plurality of the crushed members separated from each other. In this case, each of the plurality of crushed members may be fixed so as to be axially position adjustable with respect to the crushed shaft.

  In the biaxial rotary cultivator according to the present invention, the crushed shaft has mounting holes provided at a predetermined pitch along the axial direction, and the crushed member is bossed to be extrapolated to the crushed shaft, and You may have a base part extended in a radial direction outward from a boss | hub part, and a rod part extended in an axial direction from the radial direction outward part of the said base part. In this case, the boss portion is provided with a plurality of positioning holes displaced in the axial direction and the circumferential direction, and the pitches in the axial direction of the plurality of positioning holes are preferably narrower than the predetermined pitch. .

  In the biaxial rotary tiller of such an aspect, it is preferable that at least a part of the rotation trajectory of the crushed member overlaps the shaping plate in a side view.

According to the biaxial rotary tilling machine according to the present invention, since the grinding earth member is axially adjustable in position fixed to Harrow shaft, it is possible to adjust the Harrow area relates the vehicle width direction, further, Harrow Since the transmission case is fixed to the tillage part so that the position around the input shaft for crushed soil can be adjusted, the depth of the crushed soil layer formed on the upper part of the ridge that is cultivated by the tillage part and formed by the shaping plate of the shaping part is set. It can be adjusted to a depth suitable for the crop to be planted.

Hereinafter, an embodiment of a biaxial rotary tiller according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic side view of a working vehicle to which the biaxial rotary tiller according to the present embodiment is applied.

As shown in FIG. 1, the working vehicle 100 in the form of a riding tractor includes a working vehicle main unit 50 and a biaxial rotary tiller 400 connected to the rear portion of the main unit 50.
The machine 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 a front portion of the traveling machine body 1. In addition, the rear wheel 3 and the front wheel 2 are operatively driven by the 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 tiller 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.
Further, in the cabin 6, a left / right brake pedal 20 for braking the traveling machine body 1 and a power transmission / removal operation from the engine 4 to the front wheels 2 and the rear wheels 3 are performed. A clutch pedal 21, a working machine lifting lever 22 that acts as a vertical position setting means for manually changing the height position of the biaxial rotary tiller 400, and a speed change operation on the output from the PTO shaft 18. The PTO shift lever 23 for shifting, the travel shift lever 24 for shifting the travel speed of the machine 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 for this purpose.
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 tiller 400 is connected to the working vehicle main unit (here, the rear part of the transmission case 16) via a link mechanism 300 so as to be vertically swingable.
In the present embodiment, the link mechanism 300 is a three-point link mechanism including a top 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 top link 320 has a front end connected to a top link hitch 210 at the rear of the working machine lifting mechanism 200 described below via a top 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 top link 320 is configured to be expanded and contracted by the rotation of the turnbuckle 320a so that the length of the top 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 tiller 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 tiller 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 top link 320 and the The pair of lower links 311 and 312 are moved up and down around the front end portions.

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

Next, the biaxial rotary tiller 400 according to the present embodiment will be described in detail.
FIG. 2 is a view showing a portion of the biaxial rotary tiller 400 in the working vehicle 100 shown in FIG. 1, and FIG. 2 (a) is a schematic side view of the biaxial rotary tiller 400, and FIG. b) is a schematic side view showing a state in which some members such as a cover member are removed from the biaxial rotary tiller 400. FIG.
3 is a schematic perspective view of the biaxial rotary tiller 400 shown in FIG. 1 as viewed from the upper left and diagonally backward. FIG. 4 shows the biaxial rotary tiller 400 shown in FIG. FIG.
FIG. 4 shows a state where a shaping front upper cover 425 and the like which will be described later are removed.

As shown in FIGS. 1 to 4, the biaxial rotary tiller 400 includes a tilling shaft 411, a tilling claw 412, a soil breaking shaft 422, and a soil breaking member 423.
The tillage shaft 411 is configured to be operatively driven by a PTO shaft 18 provided in the work vehicle main unit 50 (here, via a transmission shaft 452 provided with universal joints at both ends). The tilling claws 412 are provided on the tilling shaft 411.

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

FIG. 5 is an enlarged view of the crushed shaft 422 and the crushed member 423 shown in FIG.
FIGS. 6 to 8 are views showing the crushed member 423, FIG. 6 (a) is a right side view (left side view) of the crushed member 423, and FIG. 7 is a left side view (right side view) of the crushed member 423, FIG. 7A is a rear view (front view) of the crushed member 423, and FIG. 7B is a plan view of the crushed member 423. FIG. 8 is a perspective view of the crushed soil member 423. FIG.
Moreover, FIG. 9 is a figure which shows the boss | hub part in the said crushing shaft 422 and the said crushing member 423. FIG.

  As shown in FIGS. 5 to 9, the crushed member 423 is fixed to the crushed shaft 422 so that the position in the axial direction can be adjusted.

In the present embodiment, the soil crushing shaft 422 has a plurality of mounting holes (here, a plurality of mountings penetrating in a direction substantially orthogonal to the axial direction) provided at a predetermined pitch P1 (see FIG. 9) along the axial direction. Holes) 422a, 422a,.
The crushed member 423 extends in the axial direction from a boss portion 423c that is extrapolated to the crushed shaft 422, a base portion 423a that extends radially outward from the boss portion 423c, and a radially outer portion of the base portion 423a. Rod part 423b.
The boss portion 423c is provided with a positioning hole (here, a positioning hole penetrating in a direction substantially orthogonal to the axial direction) 423c ′, whereby the soil crushing member 423 is formed in 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, 422a,.

  Thus, according to the biaxial rotary tiller 400 according to the present embodiment, the crushed member 423 is fixed to the crushed shaft 422 so that the position in the axial direction can be adjusted. The direction can be adjusted so that the necessary part of the soil can be crushed.

In the present embodiment, as shown in FIG. 5, the crushed member 423 is a plurality (four in this case) separated from each other, and the plurality of crushed members 423, 423,. These are fixed to the crushed earth 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, 423,... Can be made different according to the planting areas.
In addition, even when the width of the crushing crush F is changed, the distance d (see FIG. 5) between the adjacent crushing members 423 and 423 can be changed, and thereby, the dedicated width corresponding to the width of the crushing can be changed. It is possible to correspond to the changed width of the ridge F without preparing a crushed soil member.

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 line is displaced in the axial direction and the circumferential direction). Two positioning holes 423c ′ and 423c ′ penetrating in a direction substantially orthogonal to the direction are provided.
The pitch P2 in the axial direction of the plurality of positioning holes 423c ′ and 423c ′ is narrower than the predetermined pitch P1.
In such a configuration, when attaching the crushed members 423, 423,... To the crushed shaft 422, the mounting holes 422a of the predetermined pitch P1 in the crushed shaft 422 and the crushed members 423, 423,. By aligning any one of the plurality of positioning holes 423c ′ and 423c ′ of the boss portion 423c, the crushed members 423, 423,... Are finely moved within the predetermined pitch P1 in the axial direction. It becomes possible to adjust.

In addition, the said crushing shaft 422 and the said boss | hub part 423c are made into the cylindrical thing here.
Further, as shown in FIGS. 5 to 8, the base portion 423a has a plate shape here. 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.

  Here, in the rod portion 423b, a base end portion 423b 'is fixed to a radially outer end portion of the base portion 423a, and a distal end portion 423b "is a free end portion.

Here, the radially outer end portion of the base portion 423a on which the rod portion 423b is provided is a hatched area α in FIG. 6 and is radially inward from the radially outermost position of the base portion 423a. It includes a predetermined peripheral area toward the direction.
Further, as shown in FIG. 7, the rod portion 423b has the free end portion 423b '' positioned on one side and the other side with respect to the base portion 423a in the axial direction of the crushed shaft 422, The base end portion 423b ′ of the rod portion 423b is located between the one free end portion 423b ″ and the other free end portion 423b ″.

In such a configuration, the rod portion 423b can crushed the soil in a state in which a crushed region in the vehicle width direction is sufficiently secured. Furthermore, since the tip portion 423b ″ is a free end portion, the rod portion 423b can be crushed in a state where it is difficult to entangle unnecessary objects such as straw and grass.
Therefore, it is possible to prevent as much as possible unnecessary objects such as straw and grass from being entangled while securing a sufficient crushed soil region in the vehicle width direction.
In addition, the ground breaking member 423 has a simple configuration in which the rod portion 423b is provided at the radially outer end of the base portion 423a. Therefore, the weight of the ground breaking member 423 can be reduced, and inconvenience such as clogging of soil is caused. It can be crushed while effectively preventing.

In the present embodiment, the rod portion 423b moves backward toward the upstream side in the rotational direction of the soil crushing shaft 422 (see arrow A in FIG. 8) as it goes from the base end portion 423b ′ to the free end portion 423b ″. Yes.
In such a configuration, it is possible to further prevent unnecessary objects such as straw and grass from being entangled, and thereby it is possible to maintain good crushed soil performance.
The receding angle θ (see FIGS. 7A and 8) formed by the virtual straight line β along the crushed earth axis 422 and the rod portion 423b is not limited thereto, but is about 20 ° to 40 °. it can.

In the present embodiment, a plurality of the rod portions 423b are provided in the circumferential direction (here, equally in the circumferential direction) on the base portion 423a, and the adjacent rod portions 423b have different turning radii. (See FIG. 6).
In such a configuration, among the plurality of rod portions 423b, 423b,... To be crushed, one rod portion 423b ′ having a predetermined rotation radius r and the one rod portion 423b have different rotation radii R. Since the crushed soil state can be made different from that of the rod portion 423b ″, it is possible to crushed the soil while preventing the crushed soil state from being pressed as much as possible.
The minimum rotation radius among the rotation radii of the plurality of rod portions 423b, 423b,... Is not limited to this, but may be about 70% to 80% of the maximum rotation radius.

Further, in the present embodiment, the rod portions 423b, 423b,... Are positioned at the lowest point around the axis of the crushed shaft 422, as shown in FIGS. To the free end 423b "is configured to be located at substantially the same position in the vertical direction.
In such a configuration, since the rod portions 423b, 423b,... Always have a posture along the horizontal direction at the lowest point around the axis of the crushed shaft 422, the crushed soil is obtained so that a uniform crushed surface is obtained. It becomes possible.

In the present embodiment, the biaxial rotary cultivator 400 includes a cultivating unit 410 including the cultivating shaft 422 and the cultivating claw 412, and a shaping unit 421 disposed on the vehicle rear side from the cultivating unit 410. And configured to act as a rotary shaping machine.
Specifically, as shown in FIGS. 1 to 4, the shaping unit 420 has a shaping plate 421, a crushed shaft 422, and a crushed member 423.
The shaping plate 421 is configured to shape the soil G ′ cultivated by the cultivating unit 410 into a cocoon shape.
The crushed shaft 422 is operatively driven by the power from the PTO shaft 18 so that the upper part T of the ridge F shaped by the shaping plate 421 can be crushed.

FIG. 10 is a schematic diagram showing a series of operations in which the soil G is plowed, shaped and crushed by the biaxial rotary tiller 400 shown in FIG.
In the biaxial rotary tiller 400, as shown in FIG. 10, the soil G is roughly cultivated by the cultivating unit 410, and the soil G ′ roughly cultivated by the cultivating unit 410 is shaped into a cocoon shape by the shaping plate 421. Further, the upper portion T of the coarse earthen ridge F shaped by the shaping plate 421 can be crushed more finely by the crushed member 423 provided on the crushed earth shaft 422.
As described above, according to the biaxial rotary tiller 400, the soil G roughly cultivated by the tiller 410 is shaped into a cocoon shape by the shaping plate 421, and the coarse soil shaped by the shaping plate 421 is used. Since the upper part T of the ridge F can be crushed more finely by the crushed soil member 423 provided on the crushed earth shaft 422, it is possible to form the crushed crushed soil whose upper surface part to be planted more finely in one step. Become.

In the present embodiment, as shown in FIGS. 2B and 10, the biaxial rotary tiller 400 is configured such that at least a part of the rotational locus K1 of the crushed member 423 is the shaping plate 421 in a side view. And is configured to overlap.
By having such a configuration, the biaxial rotary tiller 400 shapes the coarse soil G ′ by the shaping plate 421, and at the same time finely pulverizes the upper part T of the shaped soil F by the ground 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 the power branched from the power transmission path from the PTO shaft 18 to the tilling shaft 411.
FIG. 11 shows a schematic perspective view of the power take-out mechanism and the ground breaking power transmission mechanism portion of the biaxial rotary tiller 400 as viewed obliquely from the upper right and rear.
As shown in FIG. 11, the shaping unit 420 includes a power take-out mechanism 430, a crushed transmission mechanism 440, and a crushed transmission mechanism 440 in addition to the crushed shaft 422 and the crushed member 423. 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 ground breaking shaft 422 is supported by the ground breaking transmission case 450 while being operatively connected to the output portion 442, and the ground breaking member 423 is provided on the ground breaking shaft 422. It has been.
As shown in FIG. 10, the crushed earth transmission case 450 is supported by the tillage unit 410 so as to be swingable around the input unit 441.
FIG. 14 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. 14, the transmission case 450 for crushed soil is swingable around the input shaft 443 in the input portion 441 and adjusted in position on a fixed support member 410a provided in the tillage portion 410. Supported as possible.
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 biaxial rotary tiller 400 has an upper portion T of the rough soil fence F shaped by the shaping plate 421 by swinging around the input unit 441 of the transmission case 450 for the crushed soil. The depth h of the crushed soil layer S to be crushed more finely can be adjusted.
That is, when the crushed earth transmission case 450 is swung downward about the input portion 441, the depth h1 of the crushed soil layer S1 is swung upward about the input portion 441 (for example, FIG. 10). 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 tiller 400 will be described more specifically with reference to FIGS. 12 and 13.
In FIG. 12, 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 tilling section 410 includes the driven shaft 415, the main beam 416, the tilling transmission case 417, the tilling transmission mechanism 418, and the tilling shaft 411.
In such a configuration, for example, the power from the input shaft 413 can be transmitted to the tilling shafts 411 and 411 at both outer ends in the vehicle width direction.
In FIG. 12, one of the pair of configurations (here, the right side in the traveling direction) is illustrated, but the other configuration includes a first transmission pulley 431 described later of the power take-out mechanism 430. It has substantially the same configuration as the one configuration except that it is not provided.
Therefore, in FIG. 12, the above-mentioned one configuration is shown as a representative.

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 shafts 415 and 415 extend along the vehicle width direction while being operatively connected to the input shaft 413. .
Specifically, the driven shafts 415 and 415 extend to the left and right with the input shaft 413 sandwiched therebetween, and the power from the input shaft 413 is transmitted by the drive transmission mechanism 350 via the drive transmission mechanism 350. The input shaft 413 is operatively connected.

Specifically, the driven shafts 415 and 415 are 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 shafts 415 and 415 arranged 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 driven shafts 415 and 415 so as to mesh with the first bevel gear 351 while being accommodated in the gear case 414.

The main beams 416 and 416 are connected to both sides of the gear case 414 in the vehicle width direction so as to rotatably support the driven shafts 415 and 415 about the axis, and the power transmission cases 417 and 417 for tillage are vertically The main beams 416 and 416 are connected to the outer ends in the vehicle width direction so as to extend in the direction.
Specifically, the main beams 416 and 416 are disposed so as to connect the side surfaces of the gear case 414 and the upper ends of the tillage transmission cases 417 and 417, and the driven shafts 415 and 415 are inserted therein. ing.

In the present embodiment, the main beams 416, 416 and the driven shafts 415, 415 are extendable in the vehicle width direction.
As described above, the tilling section 410 can adjust the tilling width by expanding and contracting the main beams 416 and 416 and the driven shafts 415 and 415 in the vehicle width direction.

More specifically, the driven shafts 415 and 415 are fixed to 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 can be moved axially to the position-fixed driven shaft 415a. It has a position movable driven shaft 415b connected so as not to rotate relative to the axis.
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 beams 416 and 416 include a fixed beam 416a that supports the position-fixed 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 transmission cases 417 and 417 for tillage, the bearing portion 417a at the upper end portion supports the other end portion of the driven shafts 415 and 415 so as to be rotatable about the axis, and the bearing portion 417b at the lower end portion is supported by the tillage shaft 411. , 411 is supported so as to be rotatable about its axis.

The tillage transmission mechanisms 418, 418 are accommodated in the tillage transmission cases 417, 417, and are operatively connected to the outer ends of the driven shafts 415, 415 in the vehicle width direction and the input portion 418a. The output unit 418b is located further downward.
Specifically, the tilling shafts 411 and 411 are configured to be driven by the tilling transmission mechanisms 418 and 418. That is, the tilling shafts 411 and 411 are connected to the driven shaft 415 via the tillage transmission mechanisms 418 and 418 so that the power from the driven shafts 415 and 415 is transmitted by the tilling transmission mechanisms 418 and 418. , 415 are operatively connected.

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

The tilling claw 412 is provided on the tilling shafts 411 and 411 so as not to rotate relative to the axis.
Further, the tilling shafts 411 and 411 are supported by the tilling transmission case 417 so as to extend along the vehicle width direction in a state of being operatively connected to the output portion 418b.

  In the present embodiment, the tilling unit 410 includes the driven shaft 415, the main beam 416, the tilling transmission case 417, the tilling transmission mechanism 418, and the tilling shaft 411. Since it is necessary to cultivate with the entire width of the cultivating part, as shown in FIGS. Are connected so that they cannot rotate relative to each other.

Here, the tilling shafts 411 and 411 are connected to each other through connecting members 470 so as to be movable in the vehicle width direction. By doing so, the tilling shafts 411 and 411 can move in the vehicle width direction as the main beams 416 and 416 and the driven shafts 415 and 415 expand and contract in the vehicle width direction, respectively.
Specifically, each of the first tillage shafts 411 and 411 has an inner end 411a in the vehicle width direction that is externally fitted to a tubular connecting member 470 so as to be slidable in the vehicle width direction and not rotatable relative to the axis. ing. Preferably, the tilling shafts 411 and 411 and the connecting member 470 are fixed by a fixing member BL (for example, a fixing bolt). Further, the tilling claw 412 is provided on the connecting member 470.

In the present embodiment, the power from the input shaft 413 is transmitted to the tilling shafts 411 and 411 at both outer end portions in the vehicle width direction. It is also possible to support a single tillage shaft by means of the transmission case and the bearing plate.
In such a configuration, a configuration of 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. An example of a center drive rotary type configuration that transmits to a single tillage shaft at the center in the vehicle width direction can be given.

As shown in FIGS. 1 to 4, the tilling section 410 includes a tilling cover 419, a tilling depth adjusting frame 461, a gauge ring frame 462, a gauge ring arm 463, and a gauge ring 464 in addition to the above-described configuration. And a tilling depth adjusting shaft 465.
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, 419b.

The tilling depth adjusting frame 461 has a front end attached to the main beams 416 and 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 tiller 400 via the tilling depth adjusting 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.

  In the tilling section 410 having such a configuration, the tilling depth adjusting handle 465a is rotated and the tilling depth adjusting shaft 465 is expanded and contracted, and the gauge ring 464 is moved up and down to move the biaxial rotary tiller 400. The whole is lowered or raised so that the tilling depth g1 (that is, the height g2 of the hail F) by the tilling claws 412 can be manually changed.

In the shaping unit 420, the power take-out mechanism 430 is configured to take out rotational power from the position-fixed driven shaft 415a in the 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 by the position-fixed driven shaft 415a so as not to rotate relative to the axis (see FIG. 12), and the second transmission pulley 432 is used for soil breaking, which will be described later, in the soil breaking transmission mechanism 440. The input shaft 443 is supported so as not to rotate relative to the axis. The transmission belt 433 is wound around the first and second transmission pulleys 431 and 432. Here, the transmission belt 433 is stretched by the tension roller 435 by the biasing force of the biasing member 434.

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

FIG. 13 is a schematic configuration diagram of the crushed transmission case 450 that accommodates the crushed transmission mechanism 440. FIG. 13 (a) shows a longitudinal sectional view thereof, and FIG. 13 (b) shows a side view thereof. Indicates.
As shown in FIG. 13, the ground breaking transmission mechanism 440 further includes a ground breaking 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 pulley 445 cannot be rotated relative to the crushed shaft 422 around the axis in 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 includes the ground breaking transmission mechanism 440. Rotational power from the crushed input shaft 443 is transmitted to the crushed soil shaft 422 while the transmission case 450 can swing around the crushed soil input shaft 443.

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, the earth breaking shaft 422, and the earth breaking member 423.
In the present 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 of the tool bar 424b. A pair of left and right strut frames 424c and 424c are supported at both ends in the width direction so as to be adjustable in position in the vehicle width direction.
Specifically, the support arm 424a has a front end attached to a vehicle width direction center of a support beam 416e disposed substantially parallel to the main beam 416 on the vehicle rear side of the main beam 416 and a rear end. Are integrally connected to the center of the toolbar 424a 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 424c, and the position of the pair of left and right column frames 424c and 424c is adjusted in the vehicle width direction with respect to the tool bar 424b. By doing so, the width of the eyelid F to be shaped can be adjusted.
In the present embodiment, the pair of left and right shaping plates 421 and 421 respectively cultivate the soil facing the tilling claws 412 at the rear of the outer end of the tilling shaft 411 provided with the tilling claws 412. First shaping portions 421a and 421a for moving inward, and a second extending from the inner end portion in the vehicle width direction of the first shaping portion 421a to the rear of the vehicle so that the upper end portion is inclined inward from the lower end portion. Forming portions 421b and 421b.

Specifically, the pair of shaping plates 421 and 421 are connected to the pair of column frames 424c and 424c via connecting members 421c and 421c, respectively. Here, the connecting members 421c and 421c are respectively inserted into box-shaped portions provided at the lower ends of the pair of column frames 424c and 424c, and are fixed by fixing members such as bolts.
Further, soil adhesion preventing plates 421b ′ and 421b ′ (for example, plastic plates) are provided on the inner surfaces of the second forming portions 421b and 421b, respectively.

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 arranged as described above.
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.

In addition, a soil adhesion preventing plate 426b ′ (for example, 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 so that the shaping rear upper surface cover 426 and the second shaping portion are arranged when the pair of left and right support columns 424c, 424c are adjusted in the vehicle width direction with respect to the tool bar 424b. It is possible to advance and retreat in the vehicle width direction so as to cover the upper part of the rotation locus K1 of the crushed member 423 between 421b and 421b. Here, the soil adhesion preventing plate 426b ′ is a pair of extension plates 426b ″ and 426b ″ provided at both ends in the vehicle width direction, and a pair of extension plates 426b ″ having elongated holes M extending in the vehicle width direction. , 426b ". The extension plates 426b and 426b ″ are respectively attached to both ends in the vehicle width direction so as to be adjustable in position in the vehicle width direction by fixing members such as bolts inserted through the long holes M. The soil adhesion preventing plate 426b ′ can be advanced and retracted in the vehicle width direction.

Further, as shown in FIG. 3, a pair of left and right hanger frames 427 and 427 extending rearward are extended at the center of the toolbar 424 b in the vehicle width direction.
A pair of left and right hanger mechanisms 480 and 480 are provided between the rear upper surface of the shaped rear upper surface cover 426 and the left and right hanger frames 427 and 427, and the shaped rear upper surface cover 426 includes the hanger. It can be moved up and down around the pivot shaft 424b ′ via mechanisms 480 and 480.

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.

FIG. 1 is a schematic side view of a working vehicle to which the biaxial rotary tiller according to the present embodiment is applied. FIG. 2 is a diagram showing a biaxial rotary cultivator part in the working vehicle shown in FIG. 1, wherein FIG. 2 (a) is a schematic side view of the biaxial rotary cultivator, and FIG. FIG. 3 is a schematic side view showing a state where some members such as a cover member are removed in the biaxial rotary tiller. FIG. 3 is a schematic perspective view of the biaxial rotary tiller shown in FIG. FIG. 4 is a schematic perspective view of the biaxial rotary tiller shown in FIG. FIG. 5 is an enlarged view of the earth crushing shaft and the earth breaking member portion shown in FIG. 6A and 6B are diagrams showing the crushed member. FIG. 6A is a right side view (left side view) of the crushed member, and FIG. 6B is a left side view of the crushed member. Right side view). FIG. 7 is a view showing the crushed member, FIG. 7 (a) is a rear view (front view) of the crushed member, and FIG. 7 (b) is a plan view (bottom view) of the crushed member. It is. FIG. 8 is a perspective view of the crushed member. FIG. 9 is a diagram illustrating a crushed shaft and a boss portion of the crushed member. FIG. 10 is a schematic diagram showing a series of operations in which soil is cultivated, shaped and crushed by the biaxial rotary tiller shown in FIG. FIG. 11: is the schematic perspective view which looked at the power take-out mechanism of the biaxial rotary tiller and the transmission mechanism part for crushed soil from the diagonally upper right side. FIG. 12 is a developed cross-sectional view of the power transmission mechanism portion for tillage of the tillage portion. FIG. 13: is a schematic block diagram of the transmission case for crushed soil which accommodates the transmission mechanism for crushed soil, FIG. 13 (a) shows the longitudinal cross-sectional view, and FIG.13 (b) shows the side view. FIG. 14 is a perspective view of the state in which the groundbreaking transmission case is supported by the tillage portion so as to be swingable around the input portion, as viewed from the upper left side.

18 PTO shaft 50 Working vehicle
350 Drive transmission mechanism 400 Two-axis rotary tiller
410 tillage part
410a fixed support member
410b oblong hole
410c fixing member 411 tilling shaft 412 tilling claw
413 input shaft
414 gear case
415 driven shaft
417 power transmission case
418 power transmission mechanism
420 shaping unit
421 Shaping plate 422 Crushing shaft 422a Crushing shaft mounting hole 423 Crushing member 423a Base part 423b Rod part 423c Boss part 423c 'Positioning hole of boss part
430 Power take-off mechanism
431 1st transmission pulley
432 2nd transmission pulley
433 transmission belt
434 biasing member
435 tension roller
440 Power transmission mechanism for crushed soil
443 Input shaft for crushed soil
450 Crushing transmission case P1 Predetermined pitch P2 of mounting hole Pitch in axial direction of positioning hole

Claims (3)

A working section that includes a tilling shaft that is operatively driven by a PTO shaft provided on the working vehicle and a tilling claw provided on the tilling shaft, and a shape that shapes the soil plowed by the tilling portion into a straw shape. plate, and a shaping section comprising Harrow member provided in Harrow shaft and the Harrow shaft disposed to the vehicle rear side of the cultivating shaft, rough shaped by tilling by and the fairing roughened by the tilling claws A biaxial rotary tiller that finely pulverizes the upper part of the soil ridge with the crushed member ,
The tillage unit is operatively connected to the input shaft via an input shaft that is operatively connected to the PTO shaft, a gear case that supports the input shaft along the longitudinal direction of the vehicle, and a drive transmission mechanism in the gear case. A driven shaft that is supported by the gear case so as to be along the vehicle width direction in a state in which it is in a state of being supported, and a transmission case for tillage that supports the driven shaft at the upper end side and supports the tillage shaft along the vehicle width direction at the lower end side. And a transmission mechanism for tillage housed in the tillage transmission case so as to operatively connect the driven shaft and the tillage shaft,
The shaping portion supports the crushed soil input shaft, and supports the crushed soil input shaft so as to be substantially parallel to the driven shaft on the upper end side, and supports the crushed soil shaft along the vehicle width direction on the lower end side. A power transmission case, a power transmission mechanism for operatively connecting the driven shaft and the input shaft for ground breaking, a transmission mechanism for the ground breaking accommodated in the ground breaking transmission case so as to operatively connect the input shaft for ground breaking and the shaft for ground breaking A mechanism,
The groundbreaking transmission case is fixed to the tillage part so that the position of the groundbreaking input shaft can be adjusted,
The two-axis rotary cultivator, wherein the crushed member is fixed to the crushed shaft so as to be adjustable in an axial direction position. The tillage part has a fixed support member to which the transmission case for crushed soil is connected,
The fixed support member is provided with a long hole along a circumferential direction around the input shaft for crushed soil,
2. The groundbreaking transmission case is fixed to the fixed support member so that the position around the input shaft for groundbreaking can be adjusted within a range of the long hole by a fixing member inserted through the long hole. 2-axis rotary cultivator as described in 1. The power take-out mechanism includes a first transmission pulley supported by the driven shaft so as not to rotate relative to the driven shaft, a second transmission pulley supported by the input shaft for crushed soil so as not to rotate relatively, and the first and second transmission pulleys. The biaxial rotary tiller according to claim 1 or 2, further comprising: a transmission belt wound around the tension belt; and a tension roller that applies tension to the transmission belt by a biasing force of a biasing member .

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