JP2019010082A - Farm implement - Google Patents

Abstract

To provide a mower having an excellent follow-up capability to ground surface.SOLUTION: The farm implement is attached to the rear of a traveling machine with an autohitch, and includes: an installation part having a movable member engaged to the engaging member included by the autohitch; a work part performing the farm work by receiving driving force from the traveling machine; and a connection part connecting the installation part and the work part, the installation part has a first installation member, the movable member is connected to the first installation member and rotatable around the first installation member with a first shaft.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an agricultural machine. In particular, the present invention relates to an agricultural machine that can move up and down according to the ground.

  2. Description of the Related Art Conventionally, a mower has been known as an agricultural machine that performs a mowing operation for removing weeds on farm roads and wasteland. Generally, a mowing machine can advance a mowing work by towing a working unit with a traveling machine such as a tractor. For example, Patent Document 1 discloses an offset type mowing machine in which a working unit that performs mowing work is movable to the side of the traveling machine body and performs mowing work on the side of the traveling machine body.

JP 2012-175906 A

  However, since the mowing machine described in Patent Document 1 has low followability with respect to the ground, there is a possibility that the mowing height does not become constant, or the uncut grass remains.

  This invention is made | formed in view of the said problem, and it is providing the agricultural machine with high followable | trackability with respect to the ground.

  A farm work machine according to an embodiment of the present invention is a farm work machine that is attached to a rear part of a traveling machine body via an auto hitch, and includes a mounting part that includes a movable member that is hooked to a hanging part of the auto hitch, and a traveling machine body. A working unit that receives power and performs a farming work, and a connecting unit that connects the mounting unit and the working unit, the mounting unit includes a first mounting member, and the movable member is connected to the first mounting member. The first mounting member can be rotated with respect to the first shaft.

  In the agricultural machine according to an embodiment of the present invention, the first shaft is movable by being inserted into both the first hole portion of the movable member and the second hole portion of the first mounting member. You may connect a member and the 1st mounting member so that rotation is possible.

  In the agricultural machine according to one embodiment of the present invention, the movable member has the hole portion of the first mounting member by inserting the protruding portion of the first mounting member into the hole portion of the movable member. By inserting the protruding portion, the movable member and the first mounting member may be connected, and the movable member may be rotatable with respect to the first mounting member with the protruding portion as a rotation axis.

  The mounting portion included in the agricultural machine according to the embodiment of the present invention includes a second mounting member, and the second mounting member is mounted on the auto hitch and is rotatable with respect to the auto hitch by the second shaft. May be.

  In the agricultural work machine according to the embodiment of the present invention, when the working unit is tilted in the traveling direction of the traveling machine body, the height of the first shaft from the ground is the first level before the working unit is tilted. It may be lower than the height of the shaft from the ground.

  The movable member included in the agricultural working machine according to the embodiment of the present invention may be disposed on the center line of the traveling machine body or on the extension line of the PTO shaft in a top view.

  The agricultural machine according to an embodiment of the present invention may further include a detachable member for restricting the rotation of the movable member with respect to the first mounting member.

  The movable member which the agricultural working machine in one Embodiment of this invention has may be hooked by the recessed part which a hook part has.

  In the agricultural machine according to the embodiment of the present invention, the gap between the hooking portion and the first mounting member may change as the movable member rotates.

  The mower according to the embodiment of the present invention described above can increase the followability with respect to the ground.

It is a top view which shows the structure of the mower in 1st Embodiment. It is a side view which shows the working state of the normal time of the mower in 1st Embodiment. It is a side view which shows the normal state of the movable member which the mower in 1st Embodiment has. It is a perspective view which shows the movable member which the mower in 1st Embodiment has, a mounting member, and a hitch frame. It is a side view which shows a state when the working part of the mower in 1st Embodiment inclines forward. It is a side view which shows the state of a movable member when the working part of the mower in 1st Embodiment inclines forward. It is a side view which shows a state when the working part of the mower in 1st Embodiment inclines backward. It is a side view which shows the state of a movable member when the working part of the mower in 1st Embodiment inclines backward. It is a top view which shows the structure of the mower in 1st Embodiment. It is a side view which shows the working state of the mower in 1st Embodiment.

  Hereinafter, an embodiment of an agricultural machine according to the present invention will be described with reference to the drawings. Examples of the agricultural working machine according to the embodiment of the present invention include a mowing machine, a remaining trunk processing machine, and a plow. In the present specification, an embodiment of the present invention will be described using a mower as an example. However, the agricultural machine of the present invention can be implemented in many different modes, and is not construed as being limited to the description of the examples shown below. Note that in the drawings referred to in this embodiment, the same portions or portions having similar functions are denoted by the same reference numerals, and repetitive description thereof is omitted.

  For convenience of explanation, words indicating directions such as upward, downward, forward, backward, rightward, and leftward are used, but the direction in which gravity works is downward, and vice versa. The traveling direction of the traveling machine body is the front, and the reverse is the rear. Furthermore, toward the front, the right side is right and the left side is left. For example, in the drawings, F and its arrow represent front and front in a top view and a side view. B and its arrow represent rear and rear in a top view and a side view. R and its arrow represent right and right in the top view. L and its arrow represent left and left in top view. U and its arrow represent up and up in a side view. D and its arrow represent lower and lower in a side view.

<First Embodiment>
[Composition of mower]
Hereinafter, a schematic configuration of the mower 100 according to the first embodiment will be described with reference to FIGS. FIG. 1 is a plan view showing a configuration of a mower 100 according to the first embodiment. FIG. 2 is a side view showing the configuration of the mower 100 according to the first embodiment. FIG. 3 is a side view showing the movable member 70 included in the mower 100 according to the first embodiment. FIG. 4 is a perspective view showing the movable member 70, the first mounting member 76, and the hitch frame 11 included in the mower 100 according to the first embodiment.

  The mower 100 in the present embodiment includes a mounting unit 10, a working unit 40, and a connecting unit 90 (see FIGS. 2 to 3). The mounting portion 10 includes a movable member 70 (see FIGS. 2 to 4). The mowing machine 100 is connected to the auto hitch 250 attached to the three-point link mechanism 220 provided in the traveling machine body 200 such as a tractor by the mounting unit 10. The three-point link mechanism 220 and the auto hitch 250 will be described later. Moreover, although mentioned later for details, the mounting part 10 and the operation | work part 40 are connected via the connection part 90. FIG. Thereby, the mower 100 is pulled according to the traveling of the traveling machine body 200, and the mowing work by the working unit 40 is performed. The mowing machine 100 can rotate with respect to the auto hitch 250 because the mounting unit 10 includes the movable member 70, and the working unit 40 can follow the ground.

  The mounting unit 10 includes a movable member 70, a first mounting member 76, and a second mounting member 78. The auto hitch 250 includes a first hooking portion 80 and a second hooking portion 81. The first hooking portion 80 is provided at the upper portion of the auto hitch 250, and the second hooking portion 81 is provided at the lower portion of the auto hitch 250. Although the details of the movable member 70 will be described later, the movable member 70 is connected to the first mounting member 76 by a shaft 74. The movable member 70 is attached to the auto hitch 250 by a shaft 84. The shaft 74 serves as a rotation shaft when the movable member 70 can rotate with respect to the first mounting portion 76. The shaft 84 serves as a rotation shaft when the movable member 70 can rotate with respect to the auto hitch 250. The second mounting member 78 is engaged with the second recess 87 included in the second engaging portion 81 by the shaft 82. That is, the second mounting member 78 is mounted on the auto hitch 250 by the shaft 82. The shaft 82 serves as a rotation shaft when the second mounting member 78 can rotate with respect to the auto hitch 250. When the mower 100 is mounted on the traveling machine body 200 such as a tractor, the three-point link mechanism 220 is positioned between the two rear tires 210 of the traveling machine body 200 such as a tractor. The auto hitch 250 is positioned between the three-point link mechanism 250 and the mounting portion 10. The three-point link mechanism 220 is generally composed of a top link whose length can be adjusted, a pair of left and right lift rods, and a pair of left and right lower links. Since the three-point link mechanism 220 is a known mechanism, detailed description thereof is omitted. The auto hitch 250 corresponds to the JIS standard auto hitch and the JIS special auto hitch of the JIS standard (Japan Industrial Standards standard). Since the auto hitch 250 is also a known mechanism, detailed description thereof is omitted.

  Returning to FIG. 1, the description will be continued. The working unit 40 is a part that actually performs mowing work, and includes a working rotor 41, a rotor cover 42, two side plates 43, and a cutting blade driving unit 44. The working unit 40 performs the mowing work by the cutting blade driving unit 44 receiving the power transmitted from the power transmission unit 30 and driving the work rotor 41.

  The work rotor 41 includes a rotating shaft 41a disposed between the side plates 43 and a plurality of cutting blades 41b provided on the rotating shaft 41a. The rotating shaft 41 a is provided in a horizontal direction orthogonal to the traveling direction of the traveling machine body 200. The working rotor 41 rotates the rotary shaft 41a and cuts weeds and the like with the cutting blade 41b. As the cutting blade 41b, for example, a so-called flail claw can be used. By using the flail nail, the impact on the nail when mowing the grass can be reduced, so that the nail can be prevented from being worn.

  The rotor cover 42 is a cover member disposed so as to cover the work rotor 41. The rotor cover 42 prevents scattering of weeds cut by the cutting blade 41b, soil adhering to the weeds, pebbles falling on the work surface (ground surface), and returns the cut weeds back to the cutting blade 41b. , Has the effect of crushing finely.

  The side plate 43 supports the rotor cover 42 while rotatably supporting the rotating shaft 41a via a ball bearing or the like. In the present embodiment, a cutting blade driving unit 44 is provided for the left side plate 43.

  The cutting blade drive unit 44 transmits the rotational power transmitted from the traveling machine body 200 via the power transmission unit 30 to the rotation shaft 41 a of the work rotor 41.

  As shown in FIGS. 2 and 3, the connecting portion 90 includes an offset mechanism portion 20 (shown in FIG. 1), a power transmission portion 30, and a rotation mechanism portion 50.

  The connecting portion 90 includes the hitch frame 11 that extends in the left-right direction, which is the width direction of the traveling machine body 200. The hitch frame 11 supports the first mounting portion 76 and the second mounting portion provided in the mounting portion 10. The hitch frame 11 supports the offset mechanism unit 20, the power transmission unit 30, and the rotation mechanism unit 50. The mounting portion 10 is configured to be connectable to the hitch frame 11. A gear box (not shown) is provided at the center lower portion of the hitch frame 11, and an input shaft (not shown) for receiving power from the traveling machine body 200 is provided in the gear box. The input shaft is configured such that power is transmitted from a PTO shaft 230 provided in the traveling machine body 200 via a universal joint (not shown). Further, the power is transmitted to the power transmission unit 30 via the input shaft and the gear box.

  The offset mechanism unit 20 is a mechanism for performing the offset movement of the working unit 40. Specifically, the offset mechanism unit 20 can move the working unit 40 to a position offset laterally with respect to the traveling direction of the traveling machine body 200. The offset mechanism unit 20 of the present embodiment includes an offset frame 21, a link rod 22, a support frame 23, and a telescopic member 24 (shown in FIG. 1).

  The offset frame 21 is a long frame made of a hollow member and is disposed below the power transmission unit 30. One end of the offset frame 21 is rotatably connected to the hitch frame 11 on a horizontal plane, and the other end is connected to the support frame 23.

  The link rod 22 is a long member composed of a cylindrical member and has a length comparable to that of the offset frame 21. One end of the link rod 22 is connected to the hitch frame 11 so as to be rotatable on a horizontal plane, and the other end is connected to the support frame 23. The connecting position of the offset frame 21 and the link rod 22 on the hitch frame 11 is different.

  The support frame 23 is a short member composed of a cylindrical member, and is a member that connects the offset frame 21 and the link rod 22 to each other. The offset frame 21 and the link rod 22 are connected to the support frame 23 so as to be rotatable. Further, the support frame 23 is disposed substantially parallel to the hitch frame 11.

  With the above configuration, the hitch frame 11, the offset frame 21, the link rod 22, and the support frame 23 constitute a parallelogram link mechanism having each side as a side. By this link mechanism, the offset mechanism unit 20 can offset the working unit 40.

  The telescopic member 24 (shown in FIG. 1) is a power source (actuator) of the offset mechanism unit 20, and is configured by, for example, an electric cylinder, a hydraulic cylinder, or the like. One end of the elastic member 24 is connected to the hitch frame 11, and the other end is connected to the rear side of the offset frame 21 (for example, in the vicinity of the connection portion with the support frame 23). The offset mechanism unit 20 is driven by the expansion / contraction of the expansion / contraction member 24, and the offset amount (movement amount in the offset direction) of the working unit 40 can be controlled.

  The power transmission unit 30 is a mechanism for transmitting power from the traveling machine body 200 received by an input shaft (not shown) of the mounting unit 10 to the working unit 40 side. The power transmission unit 30 is disposed on a support member (not shown) mounted on the upper portion of the offset frame 21 and moves together with the offset frame 21. That is, in this embodiment, it can be said that the power transmission unit 30 constitutes a part of the offset mechanism unit 20. In addition, the mower 100 of this embodiment is not a conventional universal joint but the chain drive mechanism as the power transmission part 30. FIG.

  The rotation mechanism unit 50 is a mechanism for rotating the working unit 40 about the axis when the traveling direction of the traveling machine body 200 is used as an axis. The power output from the power transmission unit 30 is transmitted to the cutting blade drive unit 44 via the first transmission shaft 51, the rotation mechanism unit 50, and the second transmission shaft 52.

  The first mounting member 76 and the movable member 70 will be described in detail with reference to FIG. The first mounting member 76 includes an L-side member 92 and an R-side member 94. The first mounting member 76 includes a plate-like member 96 that connects the L-side member 92 and the R-side member 94. For example, the plate-like member 96 may be bonded to the L-side member 92 and the R-side member 94, may be fixed, welded, or welded. Good. The L-side member 92 has a first through hole 62 and a third through hole 65. The R-side member 94 has a second through hole 66 and a fourth through hole 69. The first mounting member 76 and the second mounting member 78 are connected to the hitch frame 11. The movable member 70 includes an L-side member 93 and an R-side member 95. The movable member 70 includes a plate-shaped member 97 that connects the L-side member 93 and the R-side member 95, and a cylindrical member 98. The L-side member 93 has a first through hole 60 and a third through hole 63. The R-side member 95 has a second through hole 64 and a fourth through hole 67. The tubular member 98 is disposed between the L-side member 93 and the R-side member 95 of the movable member 70 so as to connect both of them. At this time, the cylindrical member 98 is disposed such that the center line (axial core) thereof substantially coincides with the center lines of the first through hole 60 and the second through hole 64. Since the cylindrical inner diameter of the cylindrical member 98 is equal to or larger than the diameters of the first through hole 60 and the second through hole 64, the first through hole 60 and the second through hole 64. Communicate with each other via a cylindrical member 98. The plate-shaped member 97 and the cylindrical member 98 may be bonded to the L-side member 93 and the R-side member 95, may be fixed, or may be welded together. And may be welded. The plate-shaped member 97 and the cylindrical member 98 can keep the distance between the L-side member 93 and the R-side member 95 of the movable member 70 constant.

  Returning to FIG. 2 and FIG. 3, the description will be continued. The movable member 70 is connected to the first mounting member 76. The movable member 70 can be rotated with respect to the first mounting member 76 by a shaft 74. The shaft 74 includes a first through hole 62 included in the L side member 92 of the first mounting member 76, a first through hole 60 included in the L side member 93 of the movable member 70, and an R of the movable member 70. The second through hole 64 of the side member 95 and the second through hole 66 of the R side member 94 of the first mounting member 76 are passed through. The movable member 70 is configured to fit between the L-side member 92 and the R-side member 94 of the first mounting member 76. The shaft 84 is engaged with the first recess 86 included in the first engagement portion 80. The shaft 74 connects the movable member 70 and the first mounting member 76 so that the movable member 70 can rotate with respect to the first mounting member 76. Further, when the movable member 70 can rotate with respect to the first mounting member 76, the mower 100 can follow the undulation of the ground. The height of the shaft 74 from the ground is higher than the height of the shaft 84 from the ground.

  In one embodiment of the present invention, the shaft 74 is composed of a bolt and a nut. The bolt includes a first through-hole 62 included in the L-side member 92 of the first mounting member 76, a first through-hole 60 included in the L-side member 93 of the movable member 70, and an R-side of the movable member 70. The second through hole 64 of the member 95 and the second through hole 66 of the R-side member 94 of the first mounting member 76 are penetrated. And the example which has fixed the end of the volt | bolt which penetrated and protruded with the nut is shown.

  However, the present invention is not limited to this example. For example, the protruding portion of the first mounting member 76 may be inserted into the hole portion of the movable member 70. The protruding portion of the first mounting member 76 connects the first mounting member 76 and the movable member 70 so that the movable member 70 can rotate with respect to the first mounting member 76. That is, the projecting portion plays the role of the shaft 74 and serves as a rotating shaft. Note that the hole may be a through hole or a bottomed hole. Further, for example, a protruding portion of the movable member 70 may be inserted into a hole portion of the first mounting member 76. The movable member 70 and the first mounting member 76 are connected by the protruding portion of the movable member 70, and the movable member 70 can rotate with respect to the first mounting member 76. That is, the projecting portion plays the role of the shaft 74 and serves as a rotating shaft. Note that the hole may be a through hole or a bottomed hole.

  Further, for example, one bolt is connected to the first hole 62 included in the L-side member 92 of the first mounting member 76 and the first hole 60 included in the L-side member 93 of the movable member 70. One end of the bolt that is inserted and protruded is fixed with one nut, and the other bolt is fixed to the second hole portion 66 of the R-side member 94 of the first mounting member 76 and a movable member. 70 is inserted into the second hole 64 of the R-side member 95, and one end of the bolt protruding through the insertion is fixed with another nut, so that the movable member without the cylindrical member 98 is provided. The member 70 may be fixed so as to be rotatable with respect to the first mounting member 76. At this time, each of the two bolts plays a role of the shaft 74, and an axis connecting the centers of the two bolts becomes a rotation axis.

  When the mower 100 operates, the movable member 70 can be rotated with respect to the first mounting member 76 provided in the mounting unit 10 by the shaft 74. The movable member 70 is slidable with respect to the first engaging portion 80 provided in the auto hitch 250 by the shaft 84. Further, the second mounting member 78 included in the mounting unit 10 can be rotated with respect to the auto hitch 250 by the shaft 82, and the second mounting member 78 is provided in the auto hitch 250 by the shaft 82. 81 is slidable. In this way, the gap between the mounting portion 10 and the auto hitch 250 changes, and the mower 100 can easily follow the ground undulations. Moreover, the mowing height can be made uniform.

  As shown in FIG. 1, in the mower 100 according to the present embodiment, the movable member 70 is disposed on the central axis of the traveling machine body 200 or an extension line of the PTO shaft 230. In the mower 100 according to this embodiment, one end of the offset mechanism unit 20 included in the connecting unit 90 and one end of the chain mechanism portion of the power transmission unit 30 extend from the vicinity of the center of the upper portion of the hitch frame 11. . The vicinity of the center of the upper portion of the hitch frame 11 is close to the central axis of the traveling machine body 200 or an extension line of the PTO shaft 230 in a top view as shown in FIG. When the mower 100 is working, it is located near the center of the upper portion of the hitch frame 11 that is most unaffected by the unevenness of the ground, and is disposed on the central axis of the traveling machine body 200 or the extension line of the PTO shaft 230. It is a member. Therefore, as shown in FIG. 1, the movable member 70 is arranged on the central axis of the traveling machine body 200 or the extension line of the PTO shaft 230, so that the mower 100 is not arranged on the extension line. It is possible to mitigate the effects of undulations on the ground.

  With the configuration as described above, the mowing machine 100 according to an embodiment of the present invention adjusts the cutting height without using a so-called position lever such as a handle or a cutting height setting lever. can do. In addition, the mower 100 according to the embodiment of the present invention has improved followability to the ground.

[Mower operation]
A state in which the working unit 40 of the mower 100 in the first embodiment works will be described. FIG. 5 is a side view showing a state where the working unit 40 of the mower 100 in the first embodiment is tilted forward, that is, the working unit 40 of the mower 100 is tilting down the ground. FIG. 6 is a side view showing a state of the movable member 70 when the working unit 40 of the mower 100 in the first embodiment is moving down the ground. FIG. 7 is a side view showing a state where the working unit 40 of the mower 100 in the first embodiment is tilted backward, that is, the working unit 40 of the mower 100 is climbing the ground. FIG. 8 is a side view showing a state of the movable member 70 when the working unit 40 of the mower 100 according to the first embodiment is climbing the ground.

  2 and 3 show a state in which the mower 100 is in “normal time”. In the present specification, the “normal time” refers to a working state in which the working unit 40 is in a horizontal state, a non-working state, a ground surface with little unevenness, or a work state on a substantially flat ground surface. When the mowing machine 100 works by widening the gap between the plate-like member 97 provided in the movable member 70 and the plate-like member 96 provided in the first mounting member 76 in a normal state. It is possible to tilt forward or backward. In other words, the working unit 40 can follow the ground both when the mower 100 moves down and when it goes up.

  During mowing work, when the mowing machine 100 is climbing a convex part or a step on the ground, the working part 40, the connecting part 90, etc. are tilted backward with respect to the traveling direction of the traveling machine body 200 (tilt backward). ) When the mower 100 is tilted too far backward, the plate-like member 97 of the movable member 70 and the plate-like member of the first mounting member 76 are provided to prevent the shaft 84 engaged with the recess 86 from being detached. It is comprised so that the member 96 may contact. That is, the plate-like member 97 included in the movable member 70 and the plate-like member 96 included in the first mounting member 76 have a role of a stopper that prevents the mowing machine 100 from tilting backward too much.

  As shown in FIGS. 5 and 6, when the working unit 40 of the mower 100 is moving down the ground during the mowing operation, the working unit 40, the mounting unit 10, etc. It is leaning towards (tilting forward). That is, when the first mounting member 76 is tilted forward, the movable member 70 can be rotated with respect to the first mounting member 76 by the shaft 74. Further, the movable member 70 can slide with respect to the engaging portion 80 by the shaft 84. Further, the second mounting member 78 included in the mounting portion 10 can be rotated with respect to the auto hitch 250 with the shaft 82 as a fulcrum. And the height from the ground of the 3rd through-hole 63 and the 4th through-hole 67 which the movable member 70 has is the 3rd through-hole 65 and the 4th through-hole 69 which the 1st mounting member 76 has. It becomes higher than the height from the ground. Further, the height of the shaft 74 in a state where the working unit 40 and the mounting unit 10 are inclined forward with respect to the traveling direction of the traveling machine body 200 is the same as the height of the shaft 74 when the working unit 40 and the mounting unit 10 are traveling. The height of the shaft 74 is not inclined with respect to the direction. That is, when the traveling machine body 200 is working, the position of the shaft 74 of the movable member 70 changes, so that the working unit 40 can follow the ground and the mowing height can be made uniform. In addition, it is possible to prevent uncutting of mowing.

  Further, when the mowing machine 100 is moving down a convex portion or a step on the ground during mowing work, since the mounting portion 10 is inclined forward, the first hooking portion 80 approaches the first mounting member 76, The gap between the first hooking portion 80 and the first mounting member 76 is narrowed. When the mounting portion 10 tilts forward, the mower 100 can mow the grass following the ground. Moreover, since the grass can be mowed following the ground, the height of the mowing can be adjusted. For example, when it is desired to lower the cutting height than usual (when it is desired to increase the length of the cutting portion), the mowing height of the mowing machine 100 can be easily adjusted by adjusting the mowing machine 100 from the horizontal state to the forward tilted state. Can be adjusted.

  In the operation of the mower, for example, when it is known in advance that the place where the work is going to be performed is uneven, the mower 100 is adjusted to a state where the mower 100 is tilted slightly forward from the horizontal state. By doing so, a gap can be formed between the plate-like member 97 included in the movable member 70 and the plate-like member 96 included in the first mounting member 76, so that the mower 100 can easily tilt backward. .

  When the mower 100 according to an embodiment of the present invention is working, for example, the height of the working unit 40 can be adjusted by adjusting the height of the fourth shaft 240 of the lower link included in the three-point link mechanism 220. Can be adjusted. That is, by adjusting the height of the work implement 40 with the fourth shaft 240 of the lower link as a fulcrum, it is possible to mow the grass following the ground.

  The mowing machine according to an embodiment of the present invention has the above-described configuration, so that the mowing machine 100 can mow the grass following the ground regardless of whether the mowing machine 100 is tilted forward or backward. is there. In addition, the height of mowing can be adjusted.

  As described above, the mower according to the embodiment of the present invention can follow the unevenness of the ground with a simple adjustment of adjusting the state from the horizontal state. In addition, the mower according to the embodiment of the present invention can adjust the cutting height by a simple adjustment of adjusting the state from the horizontal state, and can prevent the remaining mowing of the mowing.

  FIG. 9 and FIG. 10 show a state when the mower 100 is working on the ground with almost no unevenness, or a state when not working.

  In the mower 100, the detachable pin 72 is provided in the third through hole 63 included in the L side member of the movable member 70, the fourth through hole 67 included in the R side member, and the first mounting member 76. The third through hole 65 and the fourth through hole 69 are penetrated and attached.

  By using the detachable pin 72, the rotation of the movable member 70 relative to the first mounting member 76 can be restricted. Therefore, when the mowing machine 100 works on the ground with almost no unevenness, the mowing height of mowing can be made constant. Further, when the mower 100 is in a non-working state, for example, when the mower 100 that has finished the work is transported by a truck, the movable member can be stopped from rotating by using the detachable pin 72. Wear and damage can be prevented. That is, in order to prevent the movable member 70 from rotating, the movable member 70 may be fixed to the first mounting member 76 by the detachable pin 72. The detachable pin 72 may not be provided. The detachable pin 72 is not an indispensable constituent element. The movable member 70 has the third through-hole 63 and the fourth through-hole 67, and the first mounting member 76 has the third through-hole 65 and the fourth through-hole 65. The through hole 69 may not be provided.

  As mentioned above, although this invention was demonstrated referring drawings, this invention is not limited to said embodiment. Modifications can be made as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Mounting part, 11 ... Hitch frame, 20 ... Offset mechanism part, 21 ... Offset frame, 22 ... Link rod, 23 ... Support frame, 24 ... Expansion member, 30 ... Power transmission part, 40 ... Working part, 41 ... Work Rotor, 41a ... rotating shaft, 41b ... cutting blade, 42 ... rotor cover, 43 ... side plate, 44 ... cutting blade drive section, 50 ... rotating mechanism section, 60, 62 ... first through hole, 64, 66 ... first 2 through holes, 63, 65 ... third through hole, 67, 69 ... fourth through hole, 70 ... movable member, 72 ... detachable pin, 74 ... shaft (first shaft), 76 ... first 1 mounting member, 78... Second mounting member, 80 .. engaging portion, 82... Axis (second axis), 84 .. axis (third axis), 86 .. recess, 90. ... L side member, 94, 95 ... R side member, 96, 97 ... plate-like member, 98 ... cylinder Member, 100 ... mower, 200 ... vehicle body, 210 ... rear tire, 220 ... three-point link mechanism, 230 ... PTO shaft, 240 ... Axis (fourth axis), 250 ... Auto hitch

Claims (9)

A farm work machine attached to the rear part of the traveling machine body via an auto hitch,
A mounting portion comprising a movable member that is hooked to the hooking portion of the auto hitch;
A working unit that receives power from the traveling machine body and performs agricultural work;
A connecting portion for connecting the mounting portion and the working portion;
With
The mounting portion has a first mounting member,
The movable member is connected to the first mounting member and is rotatable with respect to the first mounting member by a first shaft.
Agricultural machine.   The first shaft is inserted into both the first hole portion of the movable member and the second hole portion of the first mounting member, so that the movable member and the first shaft are inserted. The agricultural working machine according to claim 1, wherein the mounting member is rotatably connected to the mounting member. The protrusion of the first mounting member is inserted into the hole of the movable member, or the protrusion of the movable member is inserted into the hole of the first mounting member. By connecting the movable member and the first mounting member,
2. The movable member according to claim 1, wherein the movable member is rotatable with respect to the first mounting member about a protruding portion of the first mounting portion or a protruding portion of the movable member as a rotation axis. Farm work machine. The mounting portion has a second mounting member;
The second mounting member is mounted on the auto hitch and is rotatable with respect to the auto hitch by a second shaft.
The agricultural working machine according to any one of claims 1 to 3.   When the working unit is tilted in the traveling direction of the traveling machine body, the height of the first shaft from the ground is the height of the first shaft from the ground before the working unit is tilted. The agricultural working machine according to any one of claims 1 to 4, which is low as compared with the agricultural machine.   The agricultural working machine according to any one of claims 1 to 5, wherein the movable member is disposed on a center line of the traveling machine body or an extension line of a PTO shaft in a top view. A detachable member for restricting rotation of the movable member with respect to the first mounting member;
The agricultural working machine according to any one of claims 1 to 6. The movable member is engaged with a recess of the engaging portion;
The agricultural machine according to any one of claims 1 to 7. When the movable member rotates, a gap between the engaging portion and the first mounting member changes.
The agricultural machine according to any one of claims 1 to 8.

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