JP4851837B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine capable of obtaining a sufficient leveling pressure in a deep tillage work with a large amount of soil cultivated by a tillage body and capable of satisfying a leveling work.

Conventionally, the machine body connected to the tractor, the tiller body provided on the machine body for plowing work, the leveling body provided on the machine body for leveling work behind the plowing body, and the lower end portion connected to the leveling body in a rotatable manner A first connected body, a second connected body having a front end portion rotatably connected to the airframe and a rear end portion rotatably connected to an upper end portion of the first connected body, and a leveling body. There is known an agricultural machine including an urging means for urging in a direction in which the contact pressure decreases.
JP-A-9-163807

  However, in the above conventional farm work machine, the leveling body continues to be urged in the direction of decreasing the ground pressure by the urging means even if the working depth of the cultivating body becomes deep. In many deep tillage operations, the ground pressure of the leveling body becomes insufficient, and there is a possibility that satisfactory leveling work cannot be performed.

  The present invention has been made in view of the above points, and in deep plowing work with a large amount of soil cultivated by a cultivating body, sufficient ground pressure of the leveling body can be obtained, and satisfactory leveling work can be performed. The purpose is to provide a farm machine that can be used.

  The agricultural machine according to claim 1 is a machine body connected to a traveling vehicle, a tiller body provided on the machine body for plowing work, and a leveling body provided on the machine body and performing leveling work behind the tillage body. A first connecting body whose lower end is rotatably connected to the leveling body, a front end is rotatably connected to the machine body, and a rear end is rotated to the upper end of the first connecting body. A second connecting body connected to each other and having a link abutting portion; a link body which is provided on the second connecting body so as to be pivotable in the vertical direction; and is in contact with the link abutting portion; The other end is attached to the link body, and biasing means for biasing the ground leveling body in a direction in which the ground pressure of the leveling body decreases, and the working depth of the tillage body is a set depth. When the depth is deeper than the above, the link body is separated from the link contact portion, and the leveling body is In which a state that is not biased by means.

  According to a second aspect of the present invention, in the agricultural machine according to the first aspect, the set depth at which the link body is separated from the link contact portion can be adjusted.

  According to the invention which concerns on Claim 1, when the working depth of a tilling body is deeper than a setting depth, since a link body will leave | separate from a link contact part and it will be in the state which is not urged | biased by a biasing means. In deep plowing work with a large amount of soil cultivated by the cultivator, sufficient leveling pressure of the leveling tract is obtained, and satisfactory leveling work can be performed.

  According to the invention which concerns on Claim 2, since the setting depth which a link body leaves | separates from a link contact part can be adjusted, it can respond appropriately to the state of each field.

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

  In FIG. 1, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is, for example, a paddy field harrow or the like that is connected to a three-point link portion (worker lifting support device) of a tractor that is a traveling vehicle (not shown). 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 body 2 is rotatably provided with an input shaft 3 for inputting power from the tractor side. The PTO shaft of the tractor is connected to the input shaft 3 via a universal joint and a transmission shaft.

  The airframe 2 has a chain case portion 4 and a bracket portion (not shown) on both the left and right sides. Between the chain case part 4 and the bracket part on both the left and right sides, a cultivating body (rotary) 6 for performing a cultivating work while rotating around the rotation center axis X in the left and right direction based on power from the input shaft 3 side is rotatable. Is provided. The cultivating body 6 is composed of, 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 5 that covers the upper portion of the tillage body 6. At the rear end portion of the cover portion 5, a leveling body 7 that performs leveling work while rotating in the vertical direction so as to follow the farm scene A behind the tiller body 6 is provided so as to be rotatable in the vertical direction. . The leveling body 7 includes a first leveling plate (level plate) 8 whose upper end is attached to the rear end of the cover portion 5 of the machine body 2 via a rubber plate 20, and a front end at the lower end of the first leveling plate 8. The part has a second leveling plate (rake) 9 attached so as to be rotatable via a shaft 10 in the left-right direction. The first leveling plate 8 is pivotable in the vertical direction about the left and right axis 8a so that the rear end side of the first leveling plate 8 is raised and lowered, and the axis 8a extends along the axis guide portion 14. It is designed to move up and down.

  And the lower end part of the long 1st connection body 11 which consists of a pipe etc. is connected with the connection plate part 12 of the 2nd leveling board 9 of the leveling body 7 through the shaft 13 of the left-right direction so that rotation is possible. Yes.

  The upper end of the first connecting body 11 is connected to the rear end of a long second connecting body 16 formed of a U-shaped frame having a link abutting portion 15 via a shaft 17 in the left-right direction. The front end portion of the second connecting body 16 is rotatably connected to the connecting plate portion 18 of the machine body 2 via a left-right shaft 19.

  The second connecting body 16 has a substantially U-shaped cross section that opens downward, and has a substantially rectangular first plate portion 21 and downward from both widthwise ends of the first plate portion 21. A pair of left and right second plate portions 22 projecting and facing each other are provided. The lower surface of the substantially central portion in the longitudinal direction of the first plate portion 21 is a link contact portion 15. A plurality of, for example, three holes 23 a, 23 b, and 23 c are formed along the longitudinal direction of the second plate portion 22 at approximately the center in the longitudinal direction of each second plate portion 22.

  The second connecting body 16 is connected to the link abutting portion 15 via a detachable pin 26 which is a left and right axis that can be detachably attached to the link body 25 that is a rotating member that comes in contact with and away from the link contact portion 15 in a planar shape. The detachable pin 26 is provided so as to be pivotable in the vertical direction. That is, for example, in the state shown in FIG. 1, the link body 25 is attached to the attachment / detachment pin 26 attached to the pair of left and right holes 23a selected from the plurality of holes 23a, 23b, 23c of the second connector 16. A front end portion is attached, and the link body 25 is rotatable up and down around the attachment / detachment pin 26 so that the rear end side of the link body 25 moves up and down with respect to the second connecting body 16.

  Further, at the rear end portion of the link body 25, the front end portion, which is one end portion, is attached to the connecting plate portion 18 of the airframe 2 so as to be pivotable via a left and right shaft 30, and can be extended and contracted. A rear end portion, which is the other end portion of the gas spring 31 as means, is rotatably attached via a left / right shaft 32.

  The gas spring 31 causes the ground leveling body 7 to contact the ground leveling body 7 via the link body 25, the second connection body 16, the first connection body 11, etc. (the ground pressure of the second leveling board 9 with the field A). The weight of the leveling body 7 is reduced by energizing in the direction in which the pressure decreases, and has a cylinder body 33 and a rod portion 34 that enters and exits into the cylinder body 33. A base end portion of the cylinder body 33 is rotatably attached to the connecting plate portion 18 of the airframe 2 via a shaft 30, and a tip end portion of the rod portion 34 is rotated to a rear end portion of the link body 25 via a shaft 32. It is mounted movably.

  As shown in FIGS. 2 and 3, when the working depth F of the tillage body 6 becomes deeper than the preset depth set according to the state of the field during the scraping operation, the gas spring 31 is While the longest state, that is, the extended state, the link body 25 rotates downward relative to the second connecting body 16 around the attachment / detachment pin 26 to move away from the link abutting portion 15, and the leveling body 7 As a result, the leveling work by the leveling body 7 is performed in a state in which the entire weight of the leveling body 7 is applied to the farm scene A. In addition, the state shown in FIG. 3 is the highest raising state where the working depth F of the tillage body 6 is the deepest and the leveling body 7 is lifted most.

  As shown in FIGS. 4 and 5, the setting depth at which the gas spring 31 is in the longest state and the link body 25 is separated from the link abutment portion 15 is set so that the attachment / detachment pin 26 which is the rotation fulcrum of the link body 25 is Adjustment is possible by changing the mounting holes 23a, 23b, and 23c.

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

  In the case of carrying out a scraping operation using the farm work machine 1, when the farm work machine 1 is connected to the three-point link portion of the tractor and the farm work machine 1 is moved forward by the traveling of the tractor, the tiller 6 is moved from the input shaft 3 side. While rotating around the rotation center axis X based on the power to perform the tilling work, the leveling body 7 performs the leveling work while rotating up and down to follow the farm scene A behind the tilling body 6.

  At the time of such a plowing operation, as shown in FIG. 1, as shown in FIG. 1, during the shallow tillage work in which the working depth F of the tillage body 6 is relatively shallow and the rotation center axis X of the tillage body 6 is higher than the field scene A. In other words, the leveling body 7 performs the leveling work in a state where it is lightened by being urged by the gas spring 31 in the contact pressure decreasing direction, that is, upward.

  However, as shown in FIGS. 2 and 3, the working depth F of the tillage body 6 is deeper than the set depth, and the rotation center axis X of the tillage body 6 is substantially the same as the field scene A or lower than the field scene A. During deep plowing work, the gas spring 31 is in the longest state, the link body 25 is separated from the link contact portion 15, and the leveling body 7 is not urged upward in the contact pressure decreasing direction, that is, upward by the gas spring 31. As a result, the leveling body 7 performs the leveling work in a state where the entire weight of the leveling body 7 is applied to the farm scene A.

  Thus, according to the agricultural machine 1, when the working depth F of the tillage body 6 is deeper than the set depth, the gas spring 31 is in the longest state, the link body 25 is separated from the link contact portion 15, and the leveling body 7 is Since it is not energized by the gas spring 31, a sufficient ground pressure of the leveling body 7 can be obtained during deep plowing work with a large amount of soil cultivated by the cultivating body 6, and satisfactory leveling work can be performed. It is possible to improve the uniformity.

  Moreover, since the setting depth which the link body 25 leaves | separates from the link contact part 15 of the 2nd coupling body 16 is adjustable, it can respond appropriately to the state of each field.

  The urging means (support means) for urging the leveling body 7 in the direction in which the ground pressure of the leveling body 7 decreases is not limited to the gas spring 31 and uses, for example, an elastic member such as a coil spring. Etc.

It is a side view which shows the agricultural working machine which concerns on one embodiment of this invention. It is a side view at the time of deep plowing work of the agricultural working machine same as the above. It is a side view at the time of the uppermost state of an agricultural working machine same as the above. It is a side view at the time of making a setting depth shallow with the agricultural working machine same as the above. It is a side view at the time of setting shallower the agricultural working machine same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Farm machine 2 Airframe 6 Tillage body 7 Leveling body
11 First connected body
15 Link contact
16 Second connected body
25 Link body
31 Gas spring as biasing means F Working depth of tillage

Claims (2)

A fuselage connected to the traveling vehicle;
A plowing body that is provided on this machine and performs plowing work;
A leveling body that is provided in the machine body and performs leveling work behind the tillage body;
A first connection body having a lower end rotatably connected to the leveling body;
A second connection body having a front end portion rotatably connected to the machine body, a rear end portion rotatably connected to the upper end portion of the first connection body, and having a link abutting portion;
A link body provided on the second connecting body so as to be rotatable in the vertical direction, and abutting on the link abutting portion;
One end is attached to the machine body, the other end is attached to the link body, and includes a biasing means that biases the leveling body in a direction in which the ground pressure of the leveling body decreases.
When the working depth of the tillage body is deeper than a set depth, the link body is separated from the link contact portion, and the leveling body is not biased by the biasing means. Machine. The agricultural working machine according to claim 1, wherein a setting depth at which the link body is separated from the link contact portion is adjustable.

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