JP5191438B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine capable of preventing breakage of a subsoil crushed material.

  DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known. This conventional farm work machine includes a work machine main body connected to the rear part of a tractor that is a traveling vehicle, a cultivating body provided in the work machine main body for plowing work, and a leveling work provided behind the cultivating body provided in the work machine main body. And a subsoil body (subsoiler body) that is provided on the work machine body and performs subsoil crushing work behind the cultivator.

Japanese Patent Laying-Open No. 2005-287439 (FIG. 1)

  However, in the above-mentioned conventional agricultural machine, for example, when an obstacle such as a stone in the soil of the field hits the subsoil crusher, the subsoil crusher may be damaged.

  The present invention has been made in view of the above points, and can prevent the breakage of the subsoil crushed body. Moreover, the working state of the subsoil crushed body can be rotated downward by a plurality of biasing bodies. An object of the present invention is to provide an agricultural machine that can be smoothly returned to the factory.

  The agricultural machine according to claim 1 is connected to a traveling vehicle and has a work machine main body having a shredded body attaching portion, a tiller body provided in the work machine main body for performing a tilling work, and provided in the work machine main body. , A leveling body that performs leveling work behind the cultivated body, a subsoil crushed body that is attached to the crushed body attached portion so as to be pivotable in the vertical direction, and performs a subsoil crushing operation, and the crushed body attached portion And a plurality of urging bodies that urge the subsoil crushing body downward.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the urging force of each urging body is individually adjustable.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 1 or 2, wherein the left and right position of the subsoil crushed body is adjustable, and the subsoil crushed body is located behind the rear wheel of the traveling vehicle and The subsoil crushing work is performed in front of the cultivator.

  The farm machine according to claim 4 is the farm machine according to claim 3, comprising a plurality of subsoil crushing bodies that perform subsoil crushing work behind the rear wheel of the traveling vehicle and in front of the tillage body, close to each other. The front and rear positions of adjacent subsoil crush bodies are different.

  The agricultural machine according to claim 5 is the agricultural machine according to any one of claims 1 to 4, wherein each biasing body is exposed to the outside.

  The agricultural machine according to claim 6 is the agricultural machine according to claim 1, wherein the agricultural machine is rotatably attached to the crushed body attached portion of the working machine main body and has a rod hole, and the rod hole. For adjusting the working depth for adjusting the working depth of the subsoil crushing body, which is inserted into the rod and moves up and down in conjunction with the rotation of the subsoil crushing body and screwed to the upper end side of the rod A biasing force adjusting nut that is screwed to the lower end side of the rod and adjusts the biasing force of the biasing body, and is provided between the rotating body and the biasing force adjustment nut; Is provided.

  The agricultural machine according to claim 7 is the agricultural machine according to any one of claims 1 to 6, wherein the crushed object attached portion is attached to the attachment portion of the work machine main body so that the vertical position can be adjusted. .

  The agricultural machine according to claim 8 is the agricultural machine according to any one of claims 1 to 7, wherein the subsoil crushed body is a subsoil crushing main body having a front receiving part and a rear receiving part, and the subsoil smashing It is rotatably provided at the lower end of the main body, and has a chisel portion that abuts the front receiving portion in one state and abuts the rear receiving portion in the other state.

  According to the first aspect of the present invention, when an obstacle such as a stone in the soil comes into contact with the subsoil crushed material, the subsoil crushed material rotates upward, so that the subsoil crushed material can be prevented from being damaged. And after contact | abutting with the obstruction, even if the subsoil crushing body is rotated below by several urging | biasing bodies, it can return to the original working state smoothly.

  According to the invention which concerns on Claim 2, since the urging | biasing force of each urging | biasing body can be adjusted separately, a subsoil ground body can be returned more smoothly by the several urging | biasing body by the original working state. .

  According to the invention of claim 3, since the left and right position of the subsoil crushed body can be adjusted and the subsoil crushed body performs subsoil crushing work behind the rear wheel of the traveling vehicle and in front of the tillage body, The body can perform more appropriate subsoil crushing work.

  According to the invention according to claim 4, since the front and rear positions of the adjacent subsoil crushing bodies that are adjacent to each other are different, a smooth soil flow can be ensured, and a plurality of subsoil crushing bodies can be ensured appropriately and reliably. The subsoil can be crushed.

  According to the invention of claim 5, since each urging body is exposed to the outside, the state of the urging body can be easily confirmed as compared with the case where it is covered with a cover, and the urging body can be replaced. Easy to do.

  According to the invention of claim 6, the working depth of the subsoil can be easily adjusted by the working depth adjusting nut screwed to the upper end side of the rod, and attached to the lower end side of the rod. The urging force of the urging body can be easily adjusted by the force adjusting nut.

  According to the invention which concerns on Claim 7, the working depth of a subsoil ground body can be adjusted easily by adjusting the up-and-down position of the ground body attachment part.

  According to the invention according to claim 8, the subsoil crushed body is rotatably provided at the subsoil smashing main body part and the lower end part of the subsoil smashing main body part, and in one state abuts against the front receiving part and the other state. Since it sometimes has a chisel portion that comes into contact with the rear receiving portion, durability can be improved as compared with, for example, a configuration in which the chisel portion is fixed to the lower end portion of the subsoil crushing main body portion.

It is a side view of the agricultural working machine which concerns on the 1st Embodiment of this invention. It is a top view of an agricultural working machine same as the above. It is a side view in the state where the subsoil crushing body of the agricultural working machine same as above rotated. It is a principal part side view of an agricultural working machine same as the above. It is a principal part front view of an agricultural working machine same as the above. It is a principal part side view of the agricultural working machine which concerns on the 2nd Embodiment of this invention. It is a principal part front view of an agricultural working machine same as the above. It is a principal part front view of the agricultural working machine which concerns on the 3rd Embodiment of this invention. It is a principal part side view of the agricultural working machine which concerns on the 4th Embodiment of this invention. It is a top view of the agricultural machine based on the 5th Embodiment of this invention. It is a top view of the agricultural machine based on the 6th Embodiment of this invention. It is a principal part side view of the agricultural working machine which concerns on the 7th Embodiment of this invention. It is a side view which shows the mounting plate of an agricultural working machine same as the above. It is a side view which shows the chisel part at the time of one state of an agricultural working machine same as the above. It is a side view which shows the chisel part at the time of the other state of an agricultural working machine same as the above.

  A first embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.

  1 and 2, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to the rear part of a tractor 2 that is a traveling vehicle, and performs a tilling work and the like while moving the field forward by the traveling of the tractor 2. is there.

  As shown in FIGS. 1 and 2, the farm work machine 1 includes a work machine main body 5 connected to a three-point link hitch part (work machine lifting support part) (not shown) that the tractor 2 has at the rear.

  The work machine body 5 has a main frame portion 6 such as a frame pipe that is longitudinal in the left-right direction and has a substantially circular cross section. It has been. The shaft holder 7 is rotatably provided with an input shaft 8 in a substantially front-rear direction for inputting power from the tractor 2, and the input shaft 8 is a power transmission means comprising a joint, a transmission shaft and the like on the PTO shaft of the tractor 2. (Not shown). Further, a chain case portion 9 is provided at the left end portion of the main frame portion 6, and a bracket portion 10 is provided at the right end portion of the main frame portion 6.

  The chain case portion 9 and the bracket portion 10 of the work machine main body 5 are provided with a rotary tiller 11 that performs tilling work while rotating in a predetermined direction by power from the input shaft 8 side. A tilling body 11 includes a rotating shaft 12 in the left-right direction installed on the chain case portion 9 and the bracket portion 10, and a plurality of tilling claws 13 attached to the rotating shaft 12 and rotating together with the rotating shaft 12 to perform a tilling work. have.

  Further, the upper part of the cultivating body 11 is covered with a substantially arc plate-like cover part 15 of the work machine main body 5, and the ground leveling work is performed on the rear end part of the cover part 15 behind the cultivating body 11. A leveling body 16 such as a substantially plate-shaped flat plate is provided so as to be rotatable in the vertical direction. That is, for example, the front end portion of the leveling body 16 is rotatably attached to the rear end portion of the cover portion 15 of the work machine body 5 via the left and right shaft 17. The leveling body 16 includes a substantially plate-shaped leveling main body 18 that performs leveling work, and a connecting portion 19 that protrudes from the leveling main body 18. The connecting portion 19 of the leveling body 16 and the connecting portion 20 of the work machine body 5 are connected by connecting means 21 that can adjust the ground pressure of the leveling body 16. The connecting means 21 includes a connecting rod 22 and a plurality of coil springs 23 disposed on the outer periphery of the connecting rod 22.

  On the other hand, the work machine main body 5 is connected to the main frame portion 6 via the connecting plate portion 25 and has a longitudinal shape in the left-right direction located in front of the main frame portion 6 in parallel with the main frame portion 6 and having a substantially square cross section. A sub-frame portion 26 such as a hitch pipe is provided.

  A substantially plate-shaped crushed object mounting portion 31 that forms a pair on the left and right sides is attached to the subframe 26 via a mounting bolt 32, a nut 35, a mounting plate 33, and the like so that the left and right positions can be adjusted. In each crushed object mounting portion 31, a subsoil crushed body 30, which is a subsoiler body that performs subsoil crushing work behind the rear wheel (rear wheel tire) 3 of the tractor 2 and in front of the tillage body 11, is provided in the left-right direction. It is attached so as to be rotatable in the vertical direction about the shaft 34 of the shaft. That is, the farm work machine 1 includes a pair of left and right subsoil crushing bodies 30 that can be turned up and down between a working state and an obstacle retreating state about a left and right axis 34. The term “behind the rear wheel 3 of the tractor 2” here means not only the position just behind the rear wheel 3 but also a position slightly deviated in the left-right direction from the position behind the rear wheel 3.

  That is, as shown in FIG. 3, when the subsoil crushed body 30 is in contact with an obstacle A such as a stone in the soil when working in a working state, To turn.

  The subsoil crushed body 30 includes a knife part 36 that is a vertically flat and substantially plate-shaped subsoil smashing main body part, and a chisel part that is a blade part such as a tip provided at the lower end part of the knife part 36. 37, and the upper end portion of the knife portion 36 is rotatably attached to the crushed object attached portion 31 via a shaft 34 in the left-right direction. Each crushed object mounting portion 31 is composed of two opposing plates 31a facing each other in close proximity to each other, and the upper end portion of the knife portion 36 is inserted between the lower end portions of both opposing plates 31a. It is supported at 34 so as to be rotatable.

  As shown in FIGS. 4 and 5, the agricultural working machine 1 is disposed in the vicinity of the left and right sides of the substantially plate-like crushed body mounting portion 31 of the working machine body 5, and the subsoil crushed body 30 is By urging downward, the subsoil crusher 30 is rotated downward about the horizontal axis 34 to return to the original working state before contact with the obstacle A. The coil spring 41 is provided. In other words, a plurality of, for example two, pieces are disposed for each subsoil crusher 30, and the left and right sides are respectively left and right by coil springs 41 which are two elastically deformable compression springs corresponding to one subsoil crusher 30. It is energized downward from. The biasing force of each coil spring 41 can be individually adjusted.

  Here, as shown in FIGS. 4 and 5, a shaft-like body (rotating fulcrum) 42 having an axial direction in the left-right direction is fixed to the upper portion of the knife portion 36 of the subsoil crushed body 30. A lower rotating body 43, which is a rotating body having a substantially rectangular parallelepiped shape, is attached to the outer peripheral surfaces of both ends in the axial direction of the body 42 so as to be rotatable about the shaft-shaped body 42 which is a left-right axis.

  A screw hole portion 44 that opens upward is formed in the lower rotating body 43, and a lower end portion of a rod 45 that is a longitudinal member as an interlocking body is screwed into the screw hole portion 44, and a fixing nut 46 The lower end of the rod 45 is fixed to the lower rotating body 43. That is, the lower end portion of the rod 45 is connected to the subsoil crushed body 30 via the shaft-like body 42 and the lower rotating body 43.

  The rod 45 moves up and down relative to the crushed body attached portion 31 in conjunction with the vertical rotation of the subsoil crushed body 30 with respect to the crushed body attached portion 31, and at least the lower end side outer peripheral surface and the upper end side A thread groove 45 a is formed on the outer peripheral surface, and a coil spring 41 is disposed on the outer periphery of the rod 45. That is, the longitudinal intermediate portion of the rod 45 is inserted into the coil spring 41.

  Further, the upper end side of the rod 45 is an upper rotary body (such as a tumbler) that is a substantially cylindrical rotary body that is attached to the upper end portion of the shredded body attached portion 31 so as to be rotatable about a left and right axis 50. A rod hole 52 of 51 is inserted into the upper rotating body 51 so as to be movable up and down. The upper rotating body 51 is rotatably attached to the upper end portion of the crushed body attached portion 31 via a substantially U-shaped frame 53 and a shaft 50. That is, the upper rotating body 51 is rotatably supported by the shaft 50 on one side attached to the crushed object attached portion 31 and the shaft 50 on the other side attached to the frame 53 fixed to the crushed object attached portion 31. Has been.

  In the thread groove 45a on the outer peripheral surface of the upper end side of the rod 45, two operations for adjusting the working depth of the subsoil crushed body 30 based on the rotation of the subsoil crushed body 30 with respect to the crushed body attached portion 31 are performed. A depth adjusting nut (double nut) 56 is screwed together. An urging force adjusting nut (double nut) 57 for adjusting the urging force of the coil spring 41 against the subsoil crusher 30 is screwed into the thread groove 45a on the outer peripheral surface of the lower end side of the rod 45.

  Further, a spacer 58 such as a substantially cylindrical collar is disposed between the upper end of the upper rotating body 51 and the working depth adjusting nut 56. Between the lower end of the upper rotating body 51 and the urging force adjusting nut 57, the coil spring 41 is disposed in a compressed state by a desired amount. That is, for example, the upper end of the coil spring 41 is in contact with the lower end of the upper rotating body 51, and the lower end of the coil spring 41 is in contact with the urging force adjusting nut 57 via the ring-shaped spring receiver 59.

  As shown in FIGS. 3 and 4, the crushed body attached portion 31 that rotatably supports the subsoil crushed body 30 has a plurality of attachment plates 33 that are attachment portions of the work machine body 5. For example, it is attached by two stop pins 61 and 62. Further, an engagement recess 64 which is a hook portion formed in the crushed object attached portion 31 is hooked and engaged with an engagement pin 63 attached to the attachment plate 33. The crushed object attached portion 31 can be attached to and detached from the attachment plate 33 without a tool. The stop pin 61 is not always necessary.

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

  When the farm work machine 1 is moved forward by the traveling of the tractor 2, the cultivating body 11 rotating in a predetermined direction performs the cultivating work, and the ground leveling body 16 performs the leveling work behind the cultivating body 11. Further, in the front of the cultivating body 11, the subsoil crushed body 30 in the working state in which the chisel portion 37 is located below the lower end of the cultivating body 11 behind the rear wheel 3 of the tractor 2 is provided with a cultivating layer and a subsoil layer. Subsoil soil crushing work that crushes hard-clad soil.

  At this time, as shown in FIG. 3, when an obstacle A such as a stone in the soil abuts on the chisel portion 37 of the subsoil crushed body 30 in the working state, the subsoil crushed body 30 is Rotate upward about the shaft 34 against the urging force of the coil spring 41, which is an elastic body on the left and right sides with respect to 31, and enter an obstacle retracted state. At this time, the rod 45 moves upward in conjunction with the rotation of the subsoil crusher 30, and the left and right coil springs 41 are compressed and elastically deformed in accordance with the upward movement.

  Thereafter, when the obstacle A is separated from the chisel portion 37, the subsoil crushed body 30 is centered on the shaft 34 with respect to the crushed body attached portion 31 based on the urging force that is the elastic restoring force of the coil springs 41 on both the left and right sides. To return to the original working state.

  And according to such an agricultural machine 1, when the obstacle A, such as a stone in the soil, comes into contact with the subsoil crusher 30, the subsoil crusher 30 rotates upward and jumps up. Breakage of the crushed body 30 can be prevented, and after contact with the obstacle A, the ground soil crushed body 30 can be quickly rotated to the original working state by the biasing force of the left and right coil springs 41. It can be returned smoothly, and therefore more appropriate subsoil crushing work can be performed.

  In addition, since the urging force of each of the plurality of coil springs 41 that urge the subsoil crusher 30 can be individually adjusted, the subsoil crusher 30 can be moved more quickly by the plurality of coil springs 41 according to the original work state. The biasing force can be returned smoothly, and the adjustment of the biasing force can be easily performed by rotating the two biasing force adjusting nuts 57 screwed into the lower end side of the rod 45.

  Furthermore, the working depth of the subsoil crushed body 30 with respect to the crushed body attached portion 31 (the lower end of the subsoil crushed body 30 is rotated by rotating the subsoil crushed body 30 by a desired amount with respect to the crushed body attached portion 31. Position) can be adjusted, and appropriate subsoil crushing work can be performed with the subsoil crusher 30. In addition, the adjustment of the working depth is for adjusting two working depths screwed to the upper end side of the rod 45. This can be done easily by turning the nut 56.

  Moreover, the left-right position of the subsoil crusher 30 can be adjusted by changing the attachment position of the crusher attachment part 31 with respect to the sub-frame part 26, and the subsoil crusher 30 is located behind the rear wheel 3 of the tractor 2 and the tilled body. Since the subsoil crushing work is performed in front of 11, the subsoil crushing body 30 can perform a more appropriate subsoil crushing work.

  Furthermore, since each coil spring 41 is exposed to the outside, the compression state of the coil spring 41 can be easily confirmed and the strength of the coil spring 41 can be easily compared with, for example, the case where the coil spring 41 is covered with a cover. In addition, the coil springs 41 can be easily replaced, and there is no problem that moisture accumulates in the cover, thereby improving durability.

  In the first embodiment, the subsoil crushed body 30 is moved by the two coil springs (first spring and second spring) 41 arranged one on each of the left and right sides of the crushed body attached portion 31. The configuration for urging downward has been described. For example, as in the second embodiment shown in FIGS. 6 and 7, a substantially cylindrical attachment is provided between the subsoil crushed body 30 and the crushed body attached portion 31. A configuration may be employed in which a coil spring (third spring) 71 as a biasing body is provided and the subsoil crusher 30 is biased downward by these three coil springs 41 and 71.

  The coil spring 71 shown in FIGS. 6 and 7 is mounted in a compressed state between the upper and lower spring receivers 73 of the extendable connecting body 72, and the lower end of the connecting body 72 is left and right of the subsoil crushing body 30. The upper end portion of the connecting body 72 is rotatably connected to the crushed object attached portion 31 via the left and right shaft 75.

  Further, as in the third embodiment shown in FIG. 8, the subsoil crushed body is formed by four coil springs 41 arranged on the left and right sides of the crushed body attached portion 31 and arranged in a straight line on the left and right. The configuration may be such that 30 is biased downward.

  Further, as in the fourth embodiment shown in FIG. 9, the subsoil crushed body 30 is moved downward by the four coil springs 41 arranged side by side on the left and right sides of the crushed body attached portion 31. The structure which urges | biases to may be sufficient.

  Further, although not shown, for example, a configuration in which the subsoil crushed body 30 is urged downward by six coil springs 41 that are arranged on each of the left and right sides of the crushed body attached portion 31 may be used.

  Furthermore, it is not limited to the structure provided with a pair of left and right subsoil crushing bodies 30, and includes a plurality of subsoil crushing bodies 30 that perform subsoil crushing work behind the rear wheel 3 of the tractor 2 and in front of the tillage body 11. That is, for example, a configuration in which a plurality of, for example, two subsoil crush bodies 30 are arranged close to each other on both the left and right sides as in the fifth embodiment shown in FIG. 10, or a sixth configuration shown in FIG. A configuration in which three subsoil crush bodies 30 are arranged close to each other on both the left and right sides as in the embodiment may be used.

  In the configurations shown in FIGS. 10 and 11, the front and back positions of the subsoil crush bodies 30 adjacent to each other are different. If the front and back positions of the subsoil crush bodies 30 adjacent to each other are the same, the soil tends to accumulate between the adjacent subsoil crush bodies 30 adjacent to each other at the time of work, there is a possibility that the work may not be possible, By shifting the front and back positions of the adjacent subsoil crushing bodies 30 in close proximity to each other, a smooth soil flow can be secured without widening the gap between the two subsoil crushing bodies 30, preventing work from becoming impossible. it can.

  On the other hand, the agricultural machine 1 may be the one according to the seventh embodiment, that is, the configuration shown in FIG.

  In the configuration shown in FIG. 12, the crushed body attached portion 31 of the work machine body 5 is attached to the attachment plate 33 as the attachment portion so that the vertical position can be adjusted in a plurality of stages, for example, two stages.

  As shown in FIG. 13, the mounting plate 33 has a plurality of, for example, five holes arranged in the vertical direction at intervals. That is, the mounting plate 33 includes, in order from the top, the first bolt hole portion 81, the first pin hole portion / second bolt hole portion 82, the second pin hole portion 83, the first bolt hole portion 84, and the second bolt hole. Part 85. Further, the mounting plate 33 has a frame fitting portion 86 having a substantially square shape in side view and fitted to the front portion of the sub-frame 26.

  In the state shown in FIG. 12, the engaging pin 63 is inserted into the first pin hole portion / second bolt hole portion 82, and a retaining pin (not shown) is inserted into the inserted engaging pin 63. By being inserted, the engaging pin 63 is attached to the attachment plate 33 in a retaining state. The hook-shaped engaging recess 64 of the crushed object attached portion 31 is hooked on the engaging pin 63 and engaged.

  Further, in the state shown in FIG. 12, the upper bolt 91 is inserted into the upper bolt hole (not shown) and the first bolt hole 81 of the crushed object mounting portion 31 that are coincident with each other. A nut (not shown) is screwed and fastened to 91, and the lower bolt 92 is attached to the lower bolt hole portion (not shown) of the crushed object mounting portion 31 and the first bolt hole portion 84, which coincide with each other. A nut (not shown) is screwed and tightened to the inserted lower bolt 92.

  As described above, the crushed object attached portion 31 is attached to the attachment plate 33 via the two bolts 91 and 92 and the one engagement pin 63. When the crushed object attached portion 31 is attached to the attachment plate 33, the engagement pin 63 is first inserted into the first pin hole portion / second bolt hole portion 82 and attached to the attachment plate 33. By engaging the engaging recess 64 with the crushed body attached portion 31, the crushed body attached portion 31 can be rotated about the engaging pin 63. As a result, the bolt hole portion of the crushed body attached portion 31 and the bolt of the mounting plate 33 Positioning with the holes 81 and 84 can be easily performed.

  And when lowering the vertical position (height position) with respect to the mounting plate 33 of the crushed body attached portion 31 than the state shown in FIG. 12, that is, when lowering the working depth of the subsoil crushed body 30, If the engaging pin 63 is inserted into the second pin hole 83, the upper bolt 91 is inserted into the first pin hole / second bolt hole 82, and the lower bolt 92 is inserted into the second bolt hole 85. Good. That is, the crushed object attached portion 31 can be adjusted in the vertical position with respect to the attachment plate 33 by changing the hole positions into which the two bolts 91 and 92 and one engagement pin 63 are inserted.

  The crushing body mounting portion 31 is not limited to a configuration in which the vertical position can be adjusted in two steps with respect to the mounting plate 33, and the vertical position can be adjusted in three steps, four steps, five steps or more, or steplessly. It is also possible.

  12 has a front receiving portion 95 on the lower front surface and a rear receiving portion 96 on the lower rear surface. A chisel portion 37 is provided at the lower end portion of the knife portion 36 so as to be pivotable in the vertical direction about a horizontal axis 99. In the chisel portion 37, the front contact portion 97 contacts the front receiving portion 95 in one state, and the rear contact portion 98 contacts the rear receiving portion 96 in the other state.

  That is, as shown in FIG. 14, in one state, that is, during normal operation (when there is no foreign object), the chisel portion 37 receives the earth pressure from the field and has a front contact portion 97 and a front reception portion 95. The subsoil crushing work is performed in the contact state.

  As shown in FIG. 15, the chisel portion 37 is rotated by the force received from the obstacle A in another state, that is, when it is in contact with the obstacle A such as a stone in the soil, and the rear contact portion 98 and the rear The receiving portion 96 comes into contact with the receiving portion 96. When an even greater force is applied from the obstacle A to the chisel portion 37, the chisel portion 37 is integrated with the knife portion 36 as shown in FIG. Rotate upward about 34 and escape from obstacle A.

  In this way, according to the agricultural machine 1 having the configuration shown in FIG. 12, in addition to the operational effects of the above embodiment, the working depth of the subsoil crusher 30 is adjusted by adjusting the vertical position of the crusher attachment part 31. The durability of the chisel portion 37 can be improved compared to a configuration in which the chisel portion 37 is fixed to the lower end portion of the knife portion 36, for example. Further, for example, in the configuration in which the chisel portion 37 is fixed to the lower end portion of the knife portion 36 with two bolts, a large force is applied to the bolt at the time of contact (collision) with the obstacle A, and the bolt is damaged. However, the agricultural machine 1 shown in FIG. 12 can prevent such a bolt breakage.

  In addition, it is also possible to combine the structure of said each embodiment suitably, for example, the attachment structure of the crushing body attaching part 31 with respect to the attachment plate 33 shown in FIG. 12, and the rotation structure of the chisel part 37 are shown in FIG. The agricultural machine 1 applied to the thing may be used.

DESCRIPTION OF SYMBOLS 1 Farm work machine 2 Tractor which is a traveling vehicle 3 Rear wheel 5 Work machine main body
11 Tillage
16 Leveling body
30 Subsoil fragment
31 Crushed object mounting
33 Mounting plate as mounting part
36 Knife part, which is the main body part
41 Coil spring as a biasing body
45 Rod
51 Upper rotating body which is a rotating body
52 Rod hole
56 Working depth adjustment nut
57 Nut for adjusting biasing force
71 Coil spring as a biasing body
95 Front part
96 Back part

Claims (8)

A work machine body connected to the traveling vehicle and having a crushed object mounting portion;
A cultivating body that is provided in the working machine body and performs a cultivating work,
A leveling body provided in the work implement body, and performing leveling work behind the tillage body;
A subsoil crushed body that is attached to the crushed body attached portion so as to be rotatable in the vertical direction, and performs a subsoil crushing work,
A farm working machine comprising: a plurality of urging bodies disposed on both left and right sides of the crushed body attached portion and urging the subsoil crushed body downward. The agricultural machine according to claim 1, wherein the urging force of each urging body can be adjusted individually. The left and right position of the subsoil crush body can be adjusted,
The agricultural machine according to claim 1 or 2, wherein the subsoil crushing body performs subsoil crushing work behind a rear wheel of a traveling vehicle and in front of a tillage body. A plurality of subsoil crush bodies that perform subsoil crushing work behind the rear wheel of the traveling vehicle and in front of the tillage body,
The agricultural working machine according to claim 3, wherein the front and back positions of the subsoil crush bodies adjacent to each other are different from each other. Each urging body is exposed to the outside. The agricultural machine according to any one of claims 1 to 4, wherein: A rotating body rotatably attached to the crushed body attached portion of the work machine body, and having a rod hole;
A rod that is inserted into the hole for the rod and moves up and down in conjunction with the rotation of the subsoil crusher;
A nut for adjusting the working depth, which is screwed to the upper end side of the rod, and adjusts the working depth of the subsoil crushing body;
An urging force adjusting nut that is screwed to the lower end side of the rod and adjusts the urging force of the urging body;
The agricultural working machine according to claim 1, wherein an urging body is disposed between the rotating body and the urging force adjusting nut. The farm work machine according to any one of claims 1 to 6, wherein the crushed body attached portion is attached to the attachment portion of the work machine main body so that the vertical position can be adjusted. The subsoil fragment is
A subsoil crushing main body having a front receiving part and a rear receiving part;
It is rotatably provided at the lower end portion of the subsoil crushing main body portion, and has a chisel portion that abuts the front receiving portion in one state and abuts the rear receiving portion in the other state. The agricultural machine according to any one of claims 1 to 7.

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