JP7383292B2 - agricultural machinery - Google Patents

Description

TECHNICAL FIELD The present invention relates to an agricultural machine that can prevent problems from occurring in lifting assist means.

BACKGROUND ART Conventionally, an agricultural machine described in, for example, Patent Document 1 below is known. This conventional agricultural machine includes a body connected to a traveling vehicle such as a tractor, a tillage body installed on the body for tilling work, a tillage cover body covering the tillage body, and a tillage cover body provided on the tillage cover body. It is equipped with a land leveling body that performs soil leveling work behind the tilling body, and a lifting assist means that assists in lifting the land leveling body, and this lifting assist means is attached to the machine body on one side and attached to the land leveling body on the other side. attached.

JP2016-28566A

However, in the above-mentioned conventional agricultural working machine, when the vertical position of the tilling cover body is changed in response to a change in the tilling claws, for example, there is a risk that a problem may occur in the lifting assist means.

The present invention has been made in view of these points, and an object of the present invention is to provide an agricultural machine that can prevent problems from occurring in the lifting assist means.

The agricultural machine according to claim 1 comprises: a tilling body that performs tilling work; a tilling cover body that covers the tilling body and whose vertical position can be changed; a land leveling body that performs land leveling work behind the tilling body; and the tilling cover body. and a lifting assist means that is installed between the earth leveling bodies and assists in lifting the earth leveling body.

The agricultural working machine according to claim 2 is the agricultural working machine according to claim 1, in which the tilling cover body has a mounting part on one side, the earth leveling body has a mounting part on the other side, and the lifting assist means has a mounting part on the other side. One side is attached to the one side attachment part of the tilling cover body, and the other side is attached to the other side attachment part of the earth leveling body.

A third aspect of the present invention provides an agricultural working machine according to the second aspect, in which the one side attachment portion of the tillage cover body is disposed below the frame portion of the machine body when viewed from the side.

A fourth aspect of the present invention provides an agricultural working machine according to any one of claims 1 to 3, in which the standby posture of the earth leveling body is maintained constant even if the vertical position of the tilling cover body is changed.

The agricultural working machine according to claim 5 is the agricultural working machine according to claim 4, further comprising a ground pressure adjusting means for adjusting the ground pressure of the ground leveling body, and by attaching and detaching a detachable member to the ground pressure adjusting means, the top and bottom of the tilling cover body are adjusted. Even if the position is changed, the standby posture of the ground leveling body is maintained constant.

The agricultural working machine according to claim 6 is the agricultural working machine according to claim 4, further comprising a ground pressure adjusting means for adjusting the ground pressure of the ground leveling body, and by changing the position of a position changing member included in the ground pressure adjusting means, the tilling cover is changed. Even if the vertical position of the body is changed, the standby posture of the ground leveling body is maintained constant.

According to the present invention, it is possible to prevent problems from occurring in the lifting assist means.

1 is a plan view of an agricultural machine according to an embodiment of the present invention. It is a side view of the agricultural working machine same as the above. It is a partial side view of the agricultural working machine same as the above. 4 is a view taken along arrow A in FIG. 3. FIG. It is a partial side view of the same agricultural machine as above, (a) is a figure of the lower position state of the tilling cover body, (b) is a figure of the tilling cover body upper position state. It is a partial side view of the same agricultural machine as above, (a) is a figure of the lower position state of the tilling cover body, (b) is a figure of the tilling cover body upper position state. They are diagrams illustrating the lifting assist means of the agricultural working machine, in which (a) is a diagram of the tilling cover body in a lower position, and (b) is a diagram of the tilling cover body in an upper position. They are diagrams illustrating the ground pressure adjusting means of the agricultural working machine, in which (a) is a diagram of the tilling cover body in a lower position, and (b) is a diagram of the tilling cover body in an upper position. It is a figure which shows the case where a collar is not attached when the tilling cover body is placed in the upper position state. It is a top view of the ground pressure adjustment means (state where the collar is attached) of the same agricultural machine as the above. It is a top view which shows the modification of the ground pressure adjustment means same as the above.

An embodiment of the present invention will be described with reference to FIGS. 1 to 10.

Reference numeral 1 in the figure indicates an agricultural machine, and this agricultural machine 1 is connected to the rear of a tractor (not shown), which is a vehicle that can run in a field, for example, and moves in the direction of travel (forward) as the tractor runs. It is a rotary work machine that performs agricultural work (tillage, land leveling, etc.).

The agricultural machine 1 includes a body 2 that is detachably connected to a three-point link part (agricultural machine lifting part) at the rear of a tractor, and is rotatably installed on this body 2, and performs plowing work while rotating in a predetermined direction. A tilling body 3, a tilling cover body (tilting part cover) 4 which is provided on the machine body 2 so as to be able to change its vertical position and covers the upper part of the tilling body 3, and a left-right axis ( The ground leveling body (leveling plate) 6 is provided to be rotatable in the vertical direction about a rotation fulcrum 5 and performs soil leveling work behind the cultivating body 3.

The agricultural machine 1 also includes a lifting assist means 7 that is installed between the tilling cover body 4 and the land leveling body 6, and assists a worker in manually lifting the land leveling body 6 (upward rotation relative to the machine body 2) during maintenance or the like. and a ground pressure adjustment means 8 which is installed between the body 2 and the ground leveling body 6 and adjusts the ground pressure of the ground leveling body 6 with respect to the field. In the illustrated example, the number of lifting assist means 7 is one and the number of ground pressure adjusting means 8 is four, but the number of each means 7 and 8 is arbitrary. For example, the number of ground pressure adjusting means 8 may be one or two.

The body 2 has a three-point link 11 that is detachably connected to a three-point link at the rear of the tractor. This three-point connection part 11 has a top mast 12 in the center, a top pin (not shown) attached to this top mast 12, left and right lower arms 13, and a lower pin 14 attached to this lower arm 13. are doing.

The body 2 has a mission case 16 rotatably provided with an input shaft 15 connected to a PTO shaft of a tractor. Inner end portions of frame pipes 17, which are left and right frame portions, are attached to both sides of the mission case 16. A chain case 18 is attached to the outer end (left end) of the left frame pipe 17, and a bracket 19 is attached to the outer end (right end) of the right frame pipe 17. Note that each frame pipe 17 is formed in a cylindrical shape and is elongated in the left-right direction.

A tiller 3 is rotatably installed between the chain case 18 and the bracket 19, which are spaced apart from each other and face each other. In other words, the machine body 2 includes a chain case 18 and a bracket 19, which are left and right tillage body support members that rotatably support the tillage body 3.

A side cover plate 21, which is a protruding plate on the rear side, is provided at the rear end of each of the chain case 18 and the bracket 19, and a side cover plate 21, which is a protruding plate on the rear side, is provided at the rear end of each of the chain case 18 and the bracket 19. A side plate 22, which is a plate, projects integrally toward the front.

Furthermore, a mounting plate 23 is attached to the middle portion of each frame pipe 17 in the left-right direction, and mounting frames 24 having a U-shaped cross section are attached to two locations outside of this mounting plate 23. Gauge wheel means 27 is attached to the front frame 26 constructed between the left and right side plates 22.

The tiller 3 has a left-right tiller shaft 31 rotatably installed between the left and right chain cases 18 and the lower portions of the brackets 19. The tilling shaft 31 is driven to rotate in a predetermined direction by receiving power from a power transmission means (not shown) such as a chain that transmits power from the input shaft 15 side. The tilling shaft 31 has a plurality of pawl attachment portions 32 arranged at intervals in the axial direction.

Usually, a first tilling claw (a standard claw that is the first claw) 33 is removably attached to each claw attachment part 32 of the tilling shaft 31, but depending on the field etc. A second tilling claw (another optional claw) 34 having a larger rotation diameter may be detachably attached.

The rotation diameter R of the second tilling claw 34 is larger than the rotation diameter r of the first tilling claw 33 (r<R). Therefore, in accordance with the change (replacement) of the tilling claws 33, 34, it is necessary to change the vertical position (vertical position) of the tilling cover body 4 with respect to the machine body 2.

The tilling cover body 4 has a cover body plate 41 which is curved upwardly and convex and is elongated in the left and right direction and covers the upper part of the tiller body 3. A plurality of hinges are provided at the rear end of the cover body plate 41. The ground leveling body 6 is attached via 42 so as to be rotatable in the vertical direction. Cover side plates 43 are attached to both ends of the cover body plate 41 in the left and right direction. Hanging plates 44 are attached to two locations corresponding to the mounting plates 23 of the body 2 in the middle portion of the cover body plate 41 in the left-right direction. A mounting frame 45 having a U-shaped cross section is attached to one location corresponding to the lifting assist means 7 in the middle portion of the cover body plate 41 in the left-right direction.

The mounting frame 45 is fixedly erected on the upper surface of the central portion of the cover main body plate 41 in the front-rear direction. The mounting frame 45 has left and right opposing plate portions 45a that are spaced apart from each other and are opposed to each other, and a connecting plate portion 45b that connects the front ends of these opposing plate portions 45a. A plurality of holes 76 are formed in the upper part of each opposing plate part 45a. A protruding portion 40 that protrudes rearward and has a triangular shape in side view is formed at the lower part of each opposing plate portion 45a, and this protruding portion 40 is fixed to the earth leveling body attachment plate portion 52. Further, the mounting frame 45 is arranged below the frame pipe 17 of the fuselage 2 when viewed from the side. Note that the attachment frame 45 constitutes one side attachment portion 46 of the tillage cover body 4.

The tilling cover body 4 is attached to the machine body 2 by means of attachments (for example, bolts and nuts) 47 so that its vertical position can be changed. In other words, the tilling cover body 4 can be selectively changed to a lower position state corresponding to the first tilling claw 33 and an upper position state corresponding to the second tilling claw 34 by changing the attachment position to the machine body 2. There is.

The lower position state (first state) of the tillage cover body 4 means that the tillage cover body 4 is positioned at the lower position (standard position which is the first position) with respect to the machine body 2 using the lower position hole 48. It is attached to. The upper position state (second state) of the tillage cover body 4 means that the tillage cover body 4 is in an upper position with respect to the machine body 2 (a second position higher than the first position) using the upper position hole 49. (optional position).

The lower position hole 48 and the upper position hole 49 are formed in the chain case 18, the bracket 19, the side cover plate 21, the side plate 22, and the hanging plate 44. The left end cover side plate 43 is attached to the chain case 18, the side cover plate 21, and the side plate 22 by a fixture 47 so that it can be changed to a lower position and an upper position (see FIG. 5). Further, the cover side plate 43 at the right end is attached to the bracket 19, the side cover plate 21, and the side plate 22 by a fixture 47 so that it can be changed to a lower position and an upper position. The intermediate hanging plate 44 is attached to the mounting plate 23 by a fitting 47 so that it can be changed to a lower position and an upper position (see FIG. 6). In this way, the attachment position of the tilling cover body 4 to the machine body 2 can be height-adjusted to two positions (vertically adjustable) according to the rotation diameter of the tilling claws 33, 34.

The land leveling body 6 has a horizontally longitudinal land leveling body plate 51 that covers the rear part of the tilling body 3, and the front end of this land leveling body plate 51 is connected to the earth leveling body mounting plate on the upper surface side of the rear end of the cover body plate 41. It is rotatably attached to the portion 52 via a plurality of hinges 42.

Ground leveling side plates 53 are attached to both left and right ends of the ground leveling main body plate 51. A pair of left and right protruding plates 54 are attached to four locations corresponding to the ground pressure adjusting means 8 in the middle portion of the earth leveling main body plate 51 in the left and right direction. A mounting frame 55 having a U-shaped cross section is attached to one location corresponding to the lifting assist means 7 in the middle portion of the ground leveling main body plate 51 in the left-right direction. Note that the mounting frame 55 constitutes the other side mounting portion 56 of the earth leveling body 6.

Further, as shown in FIG. 4, the mounting frame (the other side mounting portion 56) 55 to which the lifting assist means 7 is attached is, for example, the back surface of the soil leveling main body plate 51 (the surface opposite to the side facing the cultivating body 3). It consists of a U-shaped frame member 57 fixed to the U-shaped frame member 57 by welding or the like, and a plate member 58 removably attached to this U-shaped frame member 57 with fittings (for example, bolts and nuts) 59.

Further, extension ground leveling bodies 60 are provided at both left and right ends of the lower end of the ground leveling body 6. The extended ground leveling body 60 can be selectively switched between a working state and a non-working state by rotating around the support shaft 50.

A lifting assist means (assist mechanism) 7 is installed between the tilling cover body 4 and the ground leveling body 6. That is, one side (front side) of the lifting assist means 7 is rotatably attached to the mounting frame 45, which is the one side attachment part 46 of the tillage cover body 4, and the other side (rear side) is attached to the mounting frame 45, which is the one side attachment part 46 of the tilling cover body 4. It is rotatably attached to a mounting frame 55, which is the other side mounting portion 56 of the body 6.

Therefore, even if the vertical position of the tilling cover body 4 with respect to the machine body 2 is changed, the positional relationship between the tilling cover body 4, the ground leveling body 6, and the lifting assist means 7 does not change. will not cause any problems.

The lifting assist means 7 assists the operator in lifting the ground leveling body 6 by the manual force of the operator, for example, by using the urging force of a gas spring 61 which is an extensible urging member. In the illustrated example, there is one gas spring 61, but the number may be arbitrary. For example, a configuration in which a plurality of gas springs are housed in the lifting assist means 7 may be used.

Further, the lifting assist means 7 can be operated in an assist-on state in which the gas spring 61 urges the ground leveling body 6 upwardly and in an assist-on state in which the gas spring 61 urges the ground leveling body 6 upwardly by operating the operating lever 62 which is an operating member. It is possible to selectively switch to an assist-off state in which no power is applied. That is, for example, rotating the operating lever 62 in one direction brings the assist off state, and rotating the operating lever 62 in the other direction brings the assist on state.

Here, as shown in FIG. 3 etc., the lifting assist means 7 includes an elongated body 63 in an elongated cylindrical shape rotatably attached to one side attachment part 46 of the tillage cover body 4, and this elongated body. 63, an elongated cylindrical moving body 64 that is movable (for example, slidable) along the longitudinal direction thereof, and an annular rotating body 65 that is rotatably attached to the other side attachment part 56 of the earth leveling body 6. have.

In the assist-on state such as during maintenance, the movable body 64 moves the elongated body 63 in accordance with the upward rotation of the ground leveling body 6 based on the biasing force of the gas spring 61 and the human power (light force) of the worker. It moves forward together with the rotating body 65. Note that the earth leveling body 6 may be rotated upward to a predetermined upper limit position only by the biasing force of the gas spring 61.

The elongated body 63 is longitudinally longitudinal and cylindrical, with holes 71 and 72 formed at both ends, a long hole 73 formed at the middle part in the longitudinal direction, and a gas hole inside. Spring 61 is housed and covered. This gas spring 61 has a main body portion 61a filled with high pressure gas such as nitrogen gas, and a rod portion 61b that goes in and out of the main body portion 61a. In the illustrated example, the gas spring 61 is oriented such that the rod portion 61b is located on the front side, but the gas spring 61 may be attached in the opposite direction.

The front end portion of the elongated body 63 is rotatably attached to the one-side attachment portion 46 of the tillage cover body 4 via a shaft (pin) 75. That is, the shaft 75 is inserted into the hole 71 at the front end of the elongated body 63 and the hole (one hole selected from a plurality of holes) 76 of the mounting frame 45, which is the one-side mounting section 46. The elongated body 63 is rotatable around the shaft 75.

The rear end of the gas spring 61 is connected to the rear end of the elongated body 63 via a shaft (pin) 77. The front end of the gas spring 61 is connected to the front end of the movable body 64 via a shaft (pin) 78 movably inserted into the elongated hole 73.

Like the long body (inner pipe) 63, the movable body (outer pipe) 64 is longitudinally longitudinal and cylindrical, and the movable body 64 is provided so as to be slidable on the outer circumferential side of the long body 63. A rotating body 65 is slidably provided on the outer peripheral side of the movable body 64. Furthermore, the movable body 64 has an annular flange (protrusion) 81 that comes into contact with the rotating body 65 and pushes the rotating body 65 forward in the assist-on state.

The rotating body 65 has an annular portion 83 in which a circular insertion hole 82 is formed, and a shaft portion 84 protruding from both left and right sides of the annular portion 83. The left and right shaft portions 84 are rotatably attached to the other side attachment portion 56 of the ground leveling body 6. That is, the shaft portion 84 of the rotating body 65 is rotatably fitted into a hole 85 formed in the mounting frame 55, which is the other side mounting portion 56 of the ground leveling body 6. The movable body 64, the elongated body 63, and the gas spring 61 are inserted into the insertion hole 82 of the annular portion 83.

Further, the operating lever 62 is attached to the rotating body 65 so as to be rotatable between an on position and an off position, and a regulating plate 88 that restricts rotation of the operating lever 62 is attached. This regulation plate 88 has a lever insertion hole 89 through which the operating lever 62 is inserted.

When the operating lever 62 is in the off position, the operating lever 62 and the rear end surface 63a of the elongated body 63 come into contact with each other, thereby restricting the movement of the movable body 64 relative to the elongated body 63. On the other hand, when the operating lever 62 is located in the on position, the contact between the operating lever 62 and the rear end surface 63a of the elongated body 63 is released, allowing the movable body 64 to move relative to the elongated body 63. As a result, in this state, that is, in the assist-on state, the operator can lift the ground leveling body 6 to the upper limit position with a light force.

The ground pressure adjustment means (adjustment mechanism) 8 also serves as a lower limit positioning means for the earth leveling body 6 to determine the lower limit position (standby posture) of the earth leveling body 6, and is installed between the body 2 and the earth leveling body 6. That is, the ground pressure adjustment means 8 is rotatably attached to the mounting frame 24 which is one side attachment part of the body 2 on one side (front side), and the other side (rear side) is attached to the ground leveling body 6. It is rotatably attached to a protrusion plate 54 which is the other side attachment portion.

In this ground pressure adjusting means 8, even if the vertical position of the tilling cover body 4 with respect to the machine body 2 is changed by attaching and detaching the collar 91, which is a detachable member to the ground pressure adjusting means 8, the standby posture of the ground leveling body 6 ( The standing posture, which is a sagging posture due to its own weight, is maintained constant (including approximately constant). Note that the collar 91 is, for example, a short cylindrical cylindrical member.

Here, as shown in FIGS. 8 to 10, etc., the ground pressure adjustment means 8 is rotatably connected to a connecting rod 92 rotatably attached to the mounting frame 24 of the machine body 2 and a protruding plate 54 of the ground leveling body 6. It has a tumbler 93 which can be attached and a connecting rod 92 is inserted into a rod insertion hole 94.

Further, the ground pressure adjusting means 8 includes a first spring end 96, a second spring end 97, a pressing spring 98, a buffer spring 99, a stopper 100, and a rod end 101.

The rod end 101 is fixed by welding or the like near the rear end of the connecting rod 92, and when the tumbler 93 comes into contact with the rod end 101 via the buffer spring 99 and the second spring end 97, the earth leveling body 6 The posture at the lower limit position, that is, the standby posture is determined (see FIG. 8(a)). However, when the collar 91 is attached to the connecting rod 92, the standby posture of the earth leveling body 6 is determined by the tumbler 93 coming into contact with the rod end 101 via the buffer spring 99, the collar 91, and the second spring end 97. (See FIG. 8(b)). The mounting position (mounting position) of the collar 91 is not limited to the illustrated example (the position between the buffer spring 99 and the second spring end 97), but is arbitrary. For example, the collar 91 can be mounted between the second spring end 97 and the second spring end 97. It may be attached at a position between the rod ends 101.

As is clear from FIGS. 8(a) and 8(b), the standby posture of the ground leveling body 6 is constant regardless of whether the tillage cover body 4 is in the lower position or the upper position. A space 103 having a predetermined size or more exists between the ground leveling body 6 and the cultivating body 3 in the posture.

On the other hand, as shown in FIG. 9, for example, if the collar 91 is not attached when the tillage cover body 4 is in the upper position, the standby posture of the earth leveling body 6 is lowered, the space 103 is not secured, and the tillage cover body 4 is in the upper position. As a result, there is a possibility that the earth leveling body 6 may interfere with the tilling body 3. The cylindrical collar 91 can be attached or detached from the connecting rod 92 by removing the connecting rod 92 from the mounting frame 24 of the body 2. For example, an elastically deformable C-shaped or U-shaped collar may be used so that the collar 91 can be attached and detached while the connecting rod 92 is attached.

The connecting rod 92 has a plurality of first holes 106 into which the pin portions 96a of the first spring end 96 are inserted, a plurality of second holes 107 into which the pin portions 97a of the second spring end 97 are inserted, and a stopper. It has a stopper hole 108 into which a 100 pin portion 100a is inserted.

The pin portion 100a of the stopper 100 is automatically inserted into the stopper hole 108 and locked when the operator lifts the earth leveling body 6 to the upper limit position. This unlocking is performed by operating the lever portion 100b of the stopper 100. Each spring end 96, 97 has a lever portion (not shown) for inserting and removing the pin portions 96a, 97a into and out of the holes 106, 107 of the connecting rod 92, and this lever portion is connected to the main body portion 96b. , 97b so as to be slidable in the vertical direction.

Further, a mounting hole 111 is formed at the front end of the connecting rod 92, and a shaft (pin) 113 is inserted into the mounting hole 111 and the hole 112 of the mounting frame 24, and the connecting rod is centered around this shaft 113. 92 can be rotated. Further, the tumbler 93 has mounting portions 115 on both left and right sides, and each of the mounting portions 115 is rotatably fitted into a hole 116 formed in the protruding plate 54 of the ground leveling body 6.

Next, the operation of the agricultural machine 1 will be explained.

When performing tillage work using the agricultural machine 1 connected to a tractor, the operator sets the lifting assist means 7 to the assist off state, and also adjusts the ground pressure adjustment means 8 according to field conditions etc. Position the spring ends 96, 97 at desired positions.

Furthermore, when working with the first tilling claw 33, which is a standard claw, the tilling cover body 4 may remain in the lower position, but when working with the second tilling claw 34, which is an optional claw, the tilling cover body 4 may be kept in the lower position. 4 is changed from the lower position state to the upper position state.

Even if the tillage cover body 4 is changed from the lower position to the upper position, the three positional relationships of the tillage cover body 4, the ground leveling body 6, and the lifting assist means 7 do not change (see FIG. 7), and the lower limit The standby posture of the ground leveling body 6 located at this position also remains constant (see FIG. 8). However, when making this change, it is necessary to attach the collar 91 to a predetermined position of the connecting rod 92 of the ground pressure adjusting means 8.

Then, when the agricultural machine 1 is moved by running the tractor, the tilling body 3 performs plowing work, and behind it, the soil leveling body 6 performs the soil leveling work to neatly level the field.

Furthermore, during maintenance such as nail replacement or cleaning, the operator changes the lifting assist means 7 from the assist-off state to the assist-on state. Then, the worker can easily lift the earth leveling body 6 to the upper limit position with a light force, and can lock the earth leveling body 6 at the upper limit position with the stopper 100.

According to the agricultural machine 1, since the lifting assist means 7 is installed between the tilling cover body 4 and the land leveling body 6, the lifting assist means 7 not only can reduce the burden on the worker. Even if the vertical position of the tilling cover body 4 is changed, the positional relationship between the tilling cover body 4, the ground leveling body 6, and the lifting assist means 7 does not change, and the lifting assist means 7 may be damaged (including deformation), etc. It is possible to prevent problems from occurring. That is, for example, when the tillage cover body 4 is in the upper position, the entire weight of the land leveling body 6 may act on the rear end of the elongated hole portion 73 and the elongated body 63 may be damaged, or the elongated body 63 may interfere with the tillage cover body 4. It is possible to appropriately prevent damage caused by

Furthermore, by attaching and detaching the collar 91 to the ground pressure adjusting means 8, the standby posture of the soil leveling body 6 is maintained constant even if the vertical position of the tilling cover body 4 is changed. For example, when the tilling cover body 4 is in the upper position, It is possible to appropriately prevent the ground leveling body 6 from interfering with and damaging the second tilling claws 34 of the tilling body 3.

Furthermore, although the number of parts increases by using the collar 91, for example, even if the ground leveling body 6 hits a ridge or the like and is pushed forward when the tractor is backing up, the collar 91 receives that force, so the second spring end 97 damage can be prevented.

In addition, as shown in FIG. 11, in order to avoid an increase in the number of parts, the agricultural machine 1 has a second spring end (rear spring end) 97, which is a position changing member of the ground pressure adjustment means 8, in the front-rear direction. By changing the position, even if the vertical position of the tilling cover body 4 is changed, the standby posture of the earth leveling body 6 may be maintained constant (including substantially constant).

In the connecting rod 92 of the ground pressure adjusting means 8 shown in FIG. 11, a posture maintaining hole 120 for maintaining the standby posture of the ground leveling body 6 constant is formed near the rod end 101. In the case shown in FIG. 11, when the tillage cover body 4 is in the upper position, the operator inserts the pin portion 97a of the second spring end 97 into the posture maintaining hole instead of attaching the collar 91 to the connecting rod 92. It may be inserted into the section 120.

On the other hand, the lifting assist means is not limited to one using a gas spring, but may be one using a biasing body such as a coil spring.

Furthermore, the agricultural machine is not limited to one machine, and may be a foldable type divided into three parts, for example, and may include a ground leveling body consisting of a first leveling body (leveling plate), a second leveling body (rake), etc. A purge device or the like may also be used.

Further, the tilling cover body is not limited to one that can be changed to only two positions (lower position and upper position), but may be one that can be changed to three or more positions, for example.

1 Agricultural working machine 2 Machine body 3 Tilling body 4 Tilling cover body 6 Earth leveling body 7 Lifting assist means 8 Ground pressure adjustment means
17 Frame pipe which is the frame part
46 One side mounting part
56 Other side mounting part
91 Collar which is a removable member
97 Second spring end which is a position changing member

Claims (4)

A tilling body that performs tilling work,
a tillage cover body that covers the tillage body and whose vertical position can be changed;
a land leveling body that performs land leveling work behind the tilling body;
Lifting assist means installed between the tilling cover body and the land leveling body and assisting in lifting the land leveling body ;
and a ground pressure adjustment means for adjusting the ground pressure of the ground leveling body,
By attaching and detaching the detachable member to the ground pressure adjusting means, the standby posture of the earth leveling body is maintained constant even if the vertical position of the tilling cover body is changed.
An agricultural machine characterized by: A tilling body that performs tilling work,
a tillage cover body that covers the tillage body and whose vertical position can be changed;
a land leveling body that performs land leveling work behind the tilling body;
Lifting assist means installed between the tilling cover body and the land leveling body and assisting in lifting the land leveling body;
and a ground pressure adjustment means for adjusting the ground pressure of the ground leveling body,
The lifting assist means can be selectively switched between an assist on state and an assist off state,
By attaching and detaching the detachable member to the ground pressure adjusting means, the standby posture of the earth leveling body is maintained constant even if the vertical position of the tilling cover body is changed.
An agricultural machine characterized by. The tillage cover body has a mounting portion on one side,
The earth leveling body has an attachment part on the other side,
Claim 1, wherein the lifting assist means has one side attached to the one side attachment part of the tilling cover body, and the other side attached to the other side attachment part of the earth leveling body. Or the agricultural machine described in 2 . Removable parts are colored
The agricultural machine according to any one of claims 1 to 3, characterized in that :

Images