JP4944585B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can prevent the leveling body from moving up more than necessary and can perform appropriate leveling work.

Conventionally, for example, a machine body connected to the rear part of a traveling vehicle such as a tractor, a tiller body provided on the airplane body for plowing work, a leveling body provided on the machine body so as to be movable up and down and performing leveling work behind the tillage body, There is known an agricultural machine including a torsion spring that urges the leveling body and an operation lever that is provided integrally and continuously with the torsion spring to adjust the urging force of the torsion spring (see, for example, Patent Document 1). ).
JP 2002-58304 A

  However, in the above conventional farm work machine, although the biasing force of the torsion spring can be adjusted by operating the operation lever, the leveling body moves up more than necessary due to the convex part of the farm scene, and appropriate leveling work is performed. May not be done.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent a leveling body from moving up more than necessary, and can perform suitable leveling work.

請 Motomeko 1 agricultural machine according includes a body, provided on the machine body, a tilling member for the tilling, vertically movable disposed in the machine body, and ground leveling member for a ground leveling work at the rear of the tillage member A contact means having a contact portion, connecting means for connecting the machine body and the leveling body, and a contact receiving portion contacting the contact portion, wherein the contact portion is in contact with the contact receiving portion. A leveling body upper movement restricting means for regulating the upward movement of the leveling body by contact, and the upper limit position of the leveling body can be adjusted by changing the position of the contact receiving portion of the leveling body upper movement restricting means. and has a farm machine, the ground leveling member on movement restricting means is pivotally mounted in the vertical direction in the machine body, a rotating arm having a contact receiving portion, one end attached to the machine body, The other end side has a telescopic adjustable body attached to the rotating arm. That.

The agricultural machine according to claim 2 is provided with a machine body , a farming body provided in the machine body for performing a tilling work, a leveling body provided in the machine body so as to be movable up and down, and performing a leveling work behind the farming body, A contact means having a contact portion, connecting means for connecting the machine body and the leveling body, a contact receiving portion contacting the contact portion, and contact between the contact portion and the contact receiving portion. The leveling body upper movement restricting means for restricting the upward movement of the leveling body, and the upper limit position of the leveling body can be adjusted by changing the position of the contact receiving portion of the leveling body upper movement restricting means. a farm machine are, the ground leveling member on movement restricting means is vertically disposed rotatably in the machine body, a rotating arm having a contact receiving portion, with respect to the rotary arm the machine body And rotation driving means for positioning by rotating in the vertical direction.

Agricultural machine according to claim 3, wherein, in claim 1 or 2 agricultural machine, further comprising biasing means for urging the leveling member downward, one end of the biasing means is attached to the rotating arm, The other end side of the urging means is attached to the connecting means.

According to the first aspect of the present invention, since the leveling body upper movement restricting means for regulating the upward movement of the leveling body by the contact between the contact part and the contact receiving part is provided, the leveling body moves up more than necessary. Can be prevented, suitable leveling work can be performed, and the upper limit position of the leveling body can be adjusted by changing the position of the contact receiving portion of the leveling body upper movement restricting means. The leveling body upper movement restricting means is provided on the airframe so as to be pivotable in the vertical direction, and has a contact receiving portion, and one end side is attached to the airframe and the other end side is attached to the rotating arm and can be adjusted. Since it has a telescopic body, the upper limit position of the leveling body can be reliably adjusted by rotating the pivot arm by adjusting the expansion and contraction of the telescopic body.

According to the second aspect of the present invention, since the leveling body upper movement restricting means for regulating the upward movement of the leveling body by the contact between the contact part and the contact receiving part is provided, the leveling body moves up more than necessary. Can be prevented, suitable leveling work can be performed, and the upper limit position of the leveling body can be adjusted by changing the position of the contact receiving portion of the leveling body upper movement restricting means. The leveling body upper movement restricting means is provided on the machine body so as to be pivotable in the vertical direction and has a contact receiving portion. The pivot arm rotates and pivots the rotary arm with respect to the machine body in the vertical direction. Therefore, the upper limit position of the leveling body can be easily adjusted by turning the turning arm with the turning drive means.

According to the invention according to claim 3 , since the one end side is attached to the rotating arm and the other end side is attached to the connecting means, and the biasing means for biasing the leveling body downward is provided, a more appropriate leveling work can be performed. it can.

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

  1 to 3, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to a three-point link portion (worker lifting support device) at the rear of a tractor that is a traveling vehicle (not shown) so as to be movable up and down. Device.

  The farm work machine 1 includes a machine body 2 connected to a three-point link part at the rear of the tractor. The airframe 2 has a main frame portion 3 that is elongated in the left-right direction, and a gear box portion 4 is provided at the center of the main frame portion 3 in the left-right direction, and power from the tractor side is provided in the gear box portion 4. The input shaft 5 in the substantially front-rear direction for inputting is provided rotatably. The PTO shaft of the tractor is connected to the input shaft 5 via a universal joint and a transmission shaft.

  The airframe 2 has a chain case part (not shown) and a bracket part 7 on both right and left sides in the traveling direction. Between the chain case portions and the bracket portions 7 on both the left and right sides, a cultivating body (rotary) 8 for performing a cultivating operation while rotating based on power from the input shaft 5 side is rotatably provided. The cultivating body 8 is configured by, for example, a cultivating shaft in the left-right direction and cultivating claws fixed radially to the cultivating shaft.

  The machine body 2 has a substantially plate-like cover portion 9 that covers the upper portion of the tillage body 8. At the rear end portion of the cover portion 9, a leveling body 11 that performs leveling work behind the tillage body 8 to flatten the farm scene A can move up and down, that is, for example, the rear end side moves up and down around the front end side. As shown in FIG.

  The leveling body 11 has, for example, a rubber plate 12 that is a longitudinal elastic plate in the left-right direction, and the front end of the rubber plate 12 is attached to the rear end of the cover portion 9 of the machine body 2. At the rear end of the rubber plate 12, a front end portion of a first leveling member (level flat plate) 13 that is long in the left-right direction and substantially plate-like is attached. A front end portion of a substantially flat plate-like second leveling member (rake) 14 that is long in the left-right direction and attached to the rear end portion of the first leveling member 13 via a left-right axis 15 is rotatably attached. . The first leveling member 13 has an arm connected portion 16 that is a connected portion at a substantially center in the left-right direction. A spring rake 18 for embedding miscellaneous materials or the like under the farm scene A is attached to the front end side of the first leveling member 13. The leveling body 11 is composed of the rubber plate 12, the first leveling member 13, the second leveling member 14, and the like. Although not shown, the leveling body 11 may be constituted by one leveling member.

  Further, the airframe 2 has a three-point connecting portion 21 connected to the three-point link portion at the rear of the tractor. The three-point connecting portion 21 includes a top mast 23 with a top pin 22 attached to the tip and located at the approximate center in the left-right direction of the aircraft, and a pair of left and right lower arms 25 with a lower pin 24 attached to the tip. Configured.

  The airframe 2 has an arm connected portion 26 that is a connected portion at the substantially center in the left-right direction. The arm connected portion 26 is configured by a pair of left and right opposing plates 27 that are spaced apart from each other. An arm support portion 28 that is a shaped support portion is provided.

  The airframe 2 and the leveling body 11 are connected by the connecting means 30. The connecting means 30 is a substantially U-shaped frame or the like that is substantially vertically long, with its lower end connected to the arm connected portion 16 of the first leveling member 13 of the leveling body 11 through a shaft 33 in the left-right direction. The first connecting arm 31 and the upper end portion of the first connecting arm 31 are connected to the upper end portion of the first connecting arm 31 so as to be rotatable via a left and right shaft 34 and are connected to the arm connected portion 26 of the machine body 2 at the other end. The front end portion, which is the side, has a second connecting arm 32 such as a substantially U-shaped frame extending in the front-rear direction, which is rotatably connected via a left-right shaft 35.

  The second connecting arm 32 has an arm portion 36 that is substantially longitudinal in the front-rear direction and has a substantially U-shaped cross section, and a contact portion 37 is fixed to the upper surface of the rear end portion of the arm portion 36. The contact portion 37 protrudes upward from the rear end portion of the arm portion 36 and protrudes to one side, for example, the right side in the traveling direction. The contact portion 37 is a flat contact facing substantially upward. A contact surface 37a is formed.

  Further, the agricultural machine 1 is arranged on the first leveling member 13 of the leveling body 11 with respect to the machine body 2 by the contact between the contact part 37 of the second connection arm 32 of the connection means 30 and the contact receiving part (stopper) 40. A leveling body upper movement restricting means (raising restricting means) 41 that restricts only movement, for example, upward rotation, is provided.

  The position of the abutment receiving portion 40 of the leveling body upper movement restricting means 41 can be changed with respect to the machine body 2 in the vertical direction. The leveling of the abutment receiving portion 40 can be changed by changing the vertical position of the abutment receiving portion 40, that is, by changing the height position. The upper limit position (raising restriction position) of the first leveling member 13 of the body 11 can be adjusted steplessly. In addition, it is good also as a structure which can adjust the upper limit position (raising restriction position) of the leveling body 11 in steps.

  Here, the leveling body upper movement restricting means 41 is a rotation having a contact receiving portion 40 with a front end portion rotatably attached to a rear end portion of the arm support portion 28 of the machine body 2 via a shaft 42 in the left-right direction. An arm 43 and a front end portion on one end side are rotatably attached to a mounted portion 23a protruding from the top mast 23 of the airframe 2 via a shaft 44 in the left-right direction, and a rear end portion on the other end side. A telescopic arm 46 that is pivotally attached to the rear end of the pivot arm 43 via a left and right shaft 45 and that can adjust the telescopic arm 43 relative to the arm support 28 of the machine body 2. is doing.

  The telescopic body 46 is, for example, a rotational driving means that outputs a driving force and positions the rotational arm 43 relative to the arm support portion 28 of the machine body 2 by pivoting the pivot arm 43 in the vertical direction about the horizontal axis 42. The hydraulic cylinder 51 is used. The extendable body 46 may be an electric cylinder, an electric hydraulic cylinder, or the like.

  The hydraulic cylinder 51 includes a cylinder main body 52 and a rod 53 that enters and exits the cylinder main body 52, and a base end of the cylinder main body 52 is attached to a mounted portion 23 a that protrudes from the top mast 23 of the fuselage 2. The tip of the rod 53 is attached to the rear end of the turning arm 43 so as to be turnable.

  The rotating arm 43 has a plate-like arm portion 48 that is long in a substantially front-rear direction, and a contact receiving portion 40 is fixed to a side surface of the arm portion 48. The contact receiving portion 40 protrudes from the side surface of the arm portion 48 toward the left side in the traveling direction so as to face the contact portion 37 of the second connecting arm 32 of the connecting means 30. A flat contact receiving surface 40a facing downward is formed.

  Note that an operating means (not shown) is connected to the hydraulic cylinder 51 which is the telescopic body 46. When the operating means is operated, the hydraulic cylinder 51 expands and contracts, and the rotating arm 43 rotates by this expansion and contraction. The height position of the contact receiving portion 40 is changed, and the upper limit position (raising restriction position) of the first leveling member 13 of the leveling body 11 is adjusted by changing the position of the contact receiving portion 40.

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

  The farm work machine 1 is connected to the three-point link part at the rear of the tractor, and the farm work machine 1 is moved forward in the traveling direction by running the tractor.

  When the agricultural machine 1 moves forward, the tilling work is performed by the tiller 8, and the leveling work is performed by the leveling body 11, that is, the first leveling member 13 and the second leveling member 14, and as a result, the field scene As A becomes flat, miscellaneous substances such as rice straw are embedded under the field A by the spring rake 18.

  As shown in FIG. 3, the abutment surface 37a of the abutment portion 37 of the second coupling arm 32 of the coupling means 30 and the abutment receiving surface 40a of the abutment receiving portion 40 of the rotating arm 43 are opposed to each other. In the state, the first leveling member 13 of the leveling body 11 performs the leveling work in a free state, that is, in a state where it can move up and down.

  However, as shown in FIG. 1, the contact surface 37a of the contact portion 37 of the second connecting arm 32 of the connecting means 30 and the contact receiving surface 40a of the contact receiving portion 40 of the rotating arm 43 are mutually facing. Since the second connecting arm 32 cannot rotate upward in the state of contact with each other, the first leveling member 13 of the leveling body 11 is in the upward movement restricted state, that is, a preset upper limit position (raised) The ground leveling operation is performed while embracing the soil.

  Note that an operator riding on the tractor can change the height position of the contact receiving portion 40 by expanding and contracting the hydraulic cylinder 51 by operating an operation means (not shown) according to the state of the field, etc. The upper limit position of the first leveling member 13 can be adjusted.

  Thus, according to the agricultural machine 1, the leveling that regulates the upward movement of the first leveling member 13 of the leveling body 11 with respect to the body 2 by the contact between the contact portion 37 of the connecting means 30 and the contact receiving portion 40. Since the body movement restricting means 41 is provided, the first leveling member 13 of the leveling body 11 can be prevented from moving up more than necessary, and appropriate leveling work can be performed.

  Further, since the upper limit position of the first leveling member 13 of the leveling body 11 can be adjusted by changing the position of the contact receiving portion 40 of the turning arm 43 of the leveling body upper movement restricting means 41, the field condition and the cultivation by the tillage body 8 can be adjusted. Appropriately responds to depth, etc.

  Further, the leveling body upper movement restricting means 41 is a hydraulic arm that is a rotation arm 43 in which the contact receiving portion 40 is formed, and a telescopic body 46 that can adjust the expansion and contraction to output the driving force and rotate the rotation arm 43. With the cylinder 51, the upper limit position of the first leveling member 13 of the leveling body 11 can be adjusted reliably and easily.

  Next, another embodiment of the agricultural machine according to the present invention will be described with reference to FIGS.

  The farm machine 1 shown in FIGS. 4 and 5 is a telescopic urging means for urging the first leveling member 13 of the leveling body 11 downward via the connecting means 30 in the one shown in FIG. The gas spring 60 is provided. Although not shown, the first leveling member 13 may be directly biased by biasing means such as a gas spring.

  4 and FIG. 5 is a substantially V-shaped rotating arm 43 having a front arm portion 43a and a rear arm portion 43b, and the front arm portion 43a and the rear arm portion. An intermediate portion 43c, which is a connecting portion with 43b, is rotatably attached to the rear end portion of the arm support portion 28 of the machine body 2 via a left-right shaft 42.

  The front end, which is one end side of the gas spring 60, is rotatably attached to the front end portion of the front arm portion 43a of the turning arm 43 via a left / right shaft 61, and the rear end, which is the other end side of the gas spring 60 The portion is attached to the rear end portion of the second connecting arm 32 of the connecting means 30 via a horizontal shaft 34 so as to be rotatable.

  For example, as shown in FIGS. 5 (a) to 5 (e), the first leveling member 13 is in contact with the airframe 2 until the contact portion 37 of the connecting means 30 contacts the contact receiving portion 40 of the rotating arm 43. When moving upward, the gas spring 60 rotates upward about the shaft 61 at the front end while keeping the first leveling member 13 biased downward via the first connecting arm 31. While shrinking by a predetermined amount.

  And according to the agricultural machine 1 shown to FIG. 4 and FIG. 5, not only there exists an effect similar to what is shown in FIG. 1, but the ground pressure of the 1st leveling member 13 increases with the urging | biasing of the gas spring 60. FIG. Therefore, a more appropriate leveling work can be performed. The urging means for urging the leveling body 11 downward may be one using a spring or the like, and the urging force may be adjusted.

  The leveling body upper movement restricting means 41 is not limited to the one having the telescopic body 46 constituted by a hydraulic cylinder 51, an electric cylinder or the like which is a rotation driving means, and may be configured as shown in FIG. 6, for example.

  The leveling body upper movement restricting means 41 shown in FIG. 6 can adjust the upper limit position of the leveling body 11 steplessly, and a shaft 44 in the left-right direction is attached to the mounted portion 23a whose one end projects from the top mast 23. The other end side is attached to the rear end portion of the turning arm 43 so as to be turnable via a left and right shaft 45 and outputs a driving force to the arm support portion 28 of the machine body 2. It has a telescopic body 71 that can be telescopically adjusted to position the rotational arm 43 by rotating it in the vertical direction.

  The telescopic body 71 is a motor 74 that is a drive source including a cylinder main body 72, a rod 73 that goes in and out of the cylinder main body 72, and an electric motor or a hydraulic motor that changes the protruding amount of the rod 73 with respect to the cylinder main body 72. It consists of and. The telescopic body 71 constitutes a motor-type rotation driving means.

Further, as shown in FIG. 7, the leveling body upper movement regulating means 41 can adjust the upper limit position of the leveling body 11 in a stepless manner, and one end side is provided with a left and right mounted portion 23a projecting from the top mast 23. The other end is attached to the rear end portion of the turning arm 43 so as to be rotatable via the left and right shaft 45 and is rotated with respect to the arm support portion 28 of the machine body 2. A configuration having an extendable / contractible body 81 that can adjust the expansion / contraction for positioning the moving arm 43 may be used. This expansion / contraction body 81 is a turnbuckle type, and is manually operated by an operator when changing the cylinder body 82, the rod 83 entering / exiting the cylinder body 82, and the projection amount of the rod 83 with respect to the cylinder body 82. And a handle 84 that is rotated and operated .

Further, the configuration of a connecting means 30 for connecting the first leveling member 13 of the machine body 2 and the leveling member 11 is not limited, for example, as shown in FIG. 8, a second body 2 and the leveling member 11 with coupling means 30 The leveling member (rake) 14 is connected, and the leveling body upper movement regulating means 41 regulates the upward movement of the second leveling member 14 of the leveling body 11, for example, the upward rotation. You may prevent it from moving upward to a position above the set upper limit position (raising restriction position). In the configuration of FIG. 8 , the second leveling member 14 has an arm connected portion 16 that is a connected portion at the center in the left-right direction, and the lower end portion of the first connecting arm of the connecting means 30 is connected to the arm connected portion 16. Are connected to each other via a shaft 33 in the left-right direction.

It is a side view of the agricultural working machine which concerns on one embodiment of this invention. It is a partial top view of an agricultural working machine same as the above. It is a side view of an agricultural working machine same as the above. It is a side view of the agricultural working machine which concerns on other embodiment of this invention. It is operation | movement explanatory drawing of an agricultural working machine same as the above. It is a side view of the agricultural working machine which concerns on other embodiment of this invention. It is a side view of the agricultural working machine which concerns on other embodiment of this invention . It is a side view of the agricultural working machine which concerns on other embodiment of this invention.

1 Agricultural machinery 2 Airframe 8 Tillage
11 Leveling body
30 Connection means
41 Leveling body movement regulation means
43 Rotating arm
46 Elastic body
51 Hydraulic cylinder as rotation drive means
60 Gas spring as biasing means
71 Telescopic body (turning drive means)
81 Elastic body

Claims (3)

The aircraft,
A plowing body that is provided on this machine and performs plowing work;
A leveling body provided on the machine body so as to be movable up and down, and performing leveling work behind the tillage body;
A connecting means having a contact portion and connecting the machine body and the leveling body;
A leveling body upper movement regulating means for regulating an upward movement of the leveling body by abutting between the abutting part and the contact receiving part;
By changing the position of the abutment receiving portion of the leveling body upper movement restricting means, the farm work machine is capable of adjusting the upper limit position of the leveling body,
The leveling body upper movement restricting means,
Rotatably mounted in the vertical direction in the machine body, a rotating arm having a contact receiving portion,
One end is attached to the machine body, agricultural working machine you characterized in that the other end and a said mounted on the rotating arm telescopic adjustable elastics. The aircraft,
A plowing body that is provided on this machine and performs plowing work;
A leveling body provided on the machine body so as to be movable up and down, and performing leveling work behind the tillage body;
A connecting means having a contact portion and connecting the machine body and the leveling body;
A leveling body upper movement regulating means for regulating an upward movement of the leveling body by abutting between the abutting part and the contact receiving part;
By changing the position of the abutment receiving portion of the leveling body upper movement restricting means, the farm work machine is capable of adjusting the upper limit position of the leveling body,
The leveling body upper movement restricting means,
Rotatably mounted in the vertical direction in the machine body, a rotating arm having a contact receiving portion,
Agricultural working machine you; and a rotary drive means for positioning the rotating arm is rotated in the vertical direction relative to the machine body. A biasing means for biasing the leveling body downward;
The agricultural working machine according to claim 1 or 2 , wherein one end side of the urging means is attached to a rotating arm, and the other end side of the urging means is attached to a connecting means.

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