JP2019013161A - Agricultural work machine - Google Patents

Abstract

To provide an agricultural work machin that enables a posture of a work body during work time and at the time of being lifted up to be adjusted.SOLUTION: An agricultural work machine 1 includes a machine body 3 connected to a tractor, and the machine body 3 is provided with an offset frame 4 so that it can rotate in a vertical direction. The offset frame 4 is provided with a weeding work body 5 that can be brought into a storage state and an offset state so that it can rotate in the vertical direction. The machine body 3 includes a front side frame 11 connected to the tractor and a rear side frame 12 vertically rotatable with respect to the front side frame 11. Posture adjusting means 101 capable of adjusting a posture of the weeding work body 5 during work time and at the time of being lifted up independently is installed between the front side frame 11 and the rear side frame 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an agricultural machine used in connection with a traveling vehicle.

  DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known.

  This conventional farm work machine includes a mounting portion that is mounted on a traveling vehicle such as a tractor, a mowing work portion that is coupled to the mounting portion via an offset mechanism portion (parallel link) that can be rotated in the horizontal direction, And an electric cylinder disposed above the mowing operation unit, and the mowing operation unit rotates in the vertical direction by the expansion and contraction of the electric cylinder.

  Further, an L-shaped guide shoe in a side view is attached to the holder of the mounting portion so as to be vertically adjustable, and the posture of the cutting working portion during work is adjusted by the vertical adjustment of the guide shoe.

JP 2011-103850 A

  However, in the conventional farm work machine, the posture of the cutting work part (working body) at the time of work can be adjusted by the L-shaped guide shoe in the side view, but the posture of the cutting work part at the time of lifting cannot be adjusted.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can adjust the attitude | position of the working body at the time of a work and the time of lifting.

  A farm work machine according to the present invention includes a machine body connected to a traveling vehicle, an offset frame provided in the machine body, and a work body provided in the offset frame and in a retracted state and an offset state. A front frame connected to the traveling vehicle, a rear frame rotatable in the vertical direction with respect to the front frame, and spanned between the front frame and the rear frame, and at the time of working and lifting And a posture adjusting means capable of individually adjusting the posture of the work body.

  ADVANTAGE OF THE INVENTION According to this invention, the attitude | position of the working body at the time of a work and a lifting can be adjusted.

1 is a perspective view of an agricultural machine according to an embodiment of the present invention. It is a side view of an agricultural working machine same as the above. It is a rear view (offset state, horizontal posture) of a farm work machine same as the above. It is a rear view (an offset state, an inclination posture) of a farm work machine same as the above. It is a rear view (storage state) of an agricultural working machine same as the above. It is a figure which shows the transmission means of an agricultural working machine same as the above. It is a figure which shows a part (chain etc.) of a transmission means same as the above. (A) is a rear view when the working body is stored, and (b) is a rear view when the working body is in an offset state. It is a side view which shows the state (the 1) at the time of work of an agricultural working machine same as the above. It is a side view which shows the state (the 2) at the time of work of an agricultural working machine same as the above. It is a side view which shows the state (the 1) at the time of lifting of an agricultural working machine same as the above. It is a side view which shows the state (the 2) at the time of lifting of an agricultural working machine same as the above. (A) And (b) is a figure which shows the principal part of the agricultural working machine which concerns on other embodiment of this invention.

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

  In the figure, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to a rear portion of a tractor 2 that is, for example, a traveling vehicle, and farming, for example, mowing while moving the farm field forward (traveling direction) by traveling of the tractor 2. A mower (offset working machine) that performs work.

  The farm work machine 1 includes a machine body 3 connected to a three-point link (not shown) at the rear of the tractor 2, and a vertical direction about the first rotation center axis (rotation fulcrum) L1 in the front-rear direction. A single offset frame 4 that is pivotally provided on the top and bottom of the offset frame 4 and a second pivot center axis (rotation fulcrum) L2 in the front-rear direction different from the first pivot center axis L1. A mowing working body (offset working part) 5 which is a working body provided to be rotatable in the direction is provided.

  Moreover, the agricultural working machine 1 is installed between the machine body 3 and the offset frame 4, and the offset frame 4 is rotated about the first rotation center axis L1 with respect to the machine body 3 and positioned at a desired position. The rotation driving means 6 is installed between the offset frame 4 and the mowing work body 5, and the mowing work body 5 is rotated with respect to the offset frame 4 about the second rotation center axis L2 and is at a desired position. And second rotation driving means 7 for positioning. The first rotation driving means 6 and the second rotation driving means 7 are positioned so as to overlap each other in the rear view.

  Further, the agricultural machine 1 is provided with transmission means 8 for inputting power from the tractor 2 and transmitting the input power to the mowing work body 5, and the rotary work means 10 of the mowing work body 5 transmits the power. The mowing operation is performed by receiving power from the means 8 and rotating.

  Based on the vertical rotation of the offset frame 4 with respect to the machine body 3 and the vertical rotation of the grass cutting work body 5 with respect to the offset frame 4, the mowing work body 5 is in the retracted state and the offset state, and is also in a horizontal posture and an inclined posture (left Including both a low-right-high inclined posture and a left-high-right-low inclined posture).

  That is, the mowing work body 5 is in a non-offset state (a state in which the entire mowing work body (including substantially the whole) is stored in the rear area of the tractor) positioned in the rear position of the tractor 2 and the tractor 2. This is an offset state (a state in which the entire mowing working body (including substantially the entire body) projects laterally with respect to the tractor) located at an offset position that is a position shifted laterally from the rear position. In other words, the horizontal position of the mowing work body 5 with respect to the machine body 3 can be adjusted.

  For this reason, by setting the grass cutting work body 5 in the offset state, the grass cutting work can be performed on the inclined surface (work target surface) inclined with respect to the traveling surface of the tractor 2 as described below.

  The mowing working body 5 has a horizontal posture along the horizontal direction (left-right direction) perpendicular to the traveling direction (front-rear direction) and the rotation center axis L3. Becomes an inclined posture inclined with respect to the horizontal direction. In other words, the inclination angle of the mowing working body 5 with respect to the horizontal direction can be adjusted.

  For this reason, the mowing operation | work with respect to the said inclined surface is also possible by making the mowing working body 5 into an inclined attitude | position according to the inclined surface (work object surface) which is the ground inclined with respect to the running surface of the tractor 2. FIG. That is, the mowing work body 5 can perform the mowing work in both the horizontal posture and the inclined posture.

  In addition, the inclination angle (angle with respect to the horizontal direction) θ of the mowing work body 5 can be adjusted to an arbitrary value within a predetermined range (for example, −45 ° ≦ θ ≦ 70 °) (FIG. 8B). See). However, for example, a configuration in which the tilt angle θ can be adjusted to 70 ° or more, or a configuration in which the tilt angle θ can be adjusted to −45 ° or less can be employed.

  The airframe 3 has a front frame 11 connected to a three-point link at the rear of the tractor 2 and a rear side attached to the front frame so as to be pivotable in the vertical direction about a horizontal axis (rotation fulcrum) 13. Frame 12.

  The front frame 11 has a three-point connecting portion 16 including a top pin 14 and a lower pin 15, and the three-point connecting portion 16 is connected to the three-point link of the tractor 2. The three-point link (agricultural equipment lifting support device) of the tractor 2 has one upper link 18 and two lower links 19 on the left and right. These links 18 and 19 are operated by a hydraulic device (not shown). The whole farm work machine 1 connected to the tractor 2 moves up and down with respect to the tractor 2 (see FIG. 11 and the like).

  The rear frame 12 has a rotation support portion 17, and the rotation support portion 17 rotatably supports a base end side that is one end side of the offset frame 4, and a tip end that is the other end side of the offset frame 4. The side supports the mowing work body 5 in a rotatable manner.

  The offset frame (vertical rotating frame) 4 is made of, for example, a single hollow-shaped member, and also serves as a transmission case that houses at least a part of the transmission means 8. The offset frame 4 has a forwardly projecting airframe mounting portion 21 at the base end, and the airframe mounting portion 21 is located on the inner peripheral side of the rotation support portion 17 of the rear frame 12 of the airframe 3 at the first rotation center. It is attached so as to be rotatable about the axis L1.

  The offset frame 4 has a front projecting forward rotation support portion 22 and a rear projecting rear rotation support portion 23 at its tip, and the mowing working body 5 is moved by the first rotation support portions 22 and 23 in the first time. The second rotation center axis L2 parallel to the movement center axis L1 is supported so as to be rotatable.

  The mowing work body 5 is provided on the front end side of the offset frame 4 so as to be rotatable in the vertical direction about the second rotation center axis L2, and is provided rotatably on the work machine body 31. Gage roller (grounding wheel) 32, which is a grounding member that contacts the ground, which is the target surface, and the work machine 31 are rotatably provided, and mowing work while rotating about the rotation center axis L3 by the power from the transmission means 8 Rotating work means 10 for (farming work).

  The work machine body 31 includes a cover plate 34 that covers the rotary working means 10 and left and right side plates 35 and 36 fixed to the side end portions of the cover plate 34. A gear case 37 and a mounting frame 38 are fixedly provided at the center of the left side plate 35, and a frame mounting portion 40 is constituted by the gear case 37 and the mounting frame 38 which are these two members.

  In other words, the work machine body 31 has a laterally projecting frame attachment portion 40 at the left side end portion, and the frame attachment portion 40 is secondly attached to the rotation support portions 22 and 23 at the distal end portion of the offset frame 4. It is attached so as to be rotatable about the rotation center axis L2.

  The rotation working means 10 has a rotation shaft 41 located on a rotation center axis L3 orthogonal to the second rotation center axis L2, and the axis of the rotation shaft 41 coincides with the rotation center axis L3. A mowing claw (frail claw) 43 is detachably attached to each claw attaching portion 42 of the rotating shaft 41 via an attaching means 44. The attachment means 44 is constituted by, for example, a bolt 45, a nut 46, a shackle 47, and the like.

  The first rotation driving means 6 is constituted only by a first cylinder 51 which is a single driving member that expands and contracts. The first cylinder 51 is composed of, for example, an electrohydraulic cylinder, and includes a cylinder main body portion 52 and a rod portion 53 that goes in and out of the cylinder main body portion 52.

  The base end portion of the cylinder main body 52 is attached to the cylinder attachment portion 55 of the rear frame 12 of the machine body 3 so as to be rotatable about a longitudinal axis 56. The distal end portion of the rod portion 53 is attached to the cylinder attachment portion 57 of the offset frame 4 so as to be rotatable about a front-rear direction shaft 58.

  The offset frame 4 rotates in the vertical direction about the first rotation center axis L <b> 1 with respect to the body 3 by the expansion and contraction of the first cylinder 51.

  The second rotation drive means 7 has a second cylinder 61 as a single drive member that expands and contracts, and an axis 63 in the front-rear direction with respect to the offset frame 4 according to the expansion and contraction operation of the second cylinder 61. The rotating member (inclined posture supporting member) 62 has a substantially triangular plate shape that rotates. The second cylinder 61 and the rotation member 62 that are rotatably connected to each other are disposed behind the offset frame 4 having a square shape.

  Similar to the first cylinder 51, the second cylinder 61 is composed of, for example, an electro-hydraulic cylinder, and has a cylinder main body 66 and a rod portion 67 that goes in and out of the cylinder main body 66.

  A base end portion of the cylinder body 66 is attached to a cylinder attachment portion 68 of the offset frame 4 so as to be rotatable about a front-rear axis 69. The distal end portion of the rod portion 67 is connected to one end portion of a rotating member 62, which is an interlocking member, so as to be rotatable about a longitudinal axis 70.

  The rotation member 62 is attached to the rotation member attachment portion 71 of the offset frame 4 so that the center portion in the longitudinal direction can rotate about the shaft 63 in the front-rear direction. In addition, a long hole-like engagement hole 72 is formed at the other end of the rotating member 62, and in this engagement hole 72, the attachment frame 38 of the work machine body 31 of the mowing work body 5 is engaged. The shaft portion 73 is slidably inserted along the engagement hole portion 72. For this reason, the mowing working body 5 is held in a desired posture by the engagement between the engagement hole portion 72 and the engagement shaft portion 73. A disc-shaped retaining member 74 is attached to the distal end side of the engagement shaft portion 73 of the attachment frame 38.

  Then, the rotation member 62 is rotated in conjunction with the expansion and contraction operation of the second cylinder 61, and the rotation of the rotation member 62 causes the mowing working body 5 to be in the second rotation center with respect to the offset frame 4. It rotates in the vertical direction about the axis L2.

  Here, as is apparent from FIG. 8, the cylinders 51 and 61 as the two actuators are located behind the tractor 2 in both the retracted state and the offset state of the mowing working body 5. That is, the two relatively heavy cylinders 51 and 61 are always located behind (directly behind) the tractor 2 regardless of the state and posture of the mowing work body 5 and do not move to the offset position with respect to the tractor 2. In other words, both the cylinders 51 and 61 are always positioned within the width of the tractor 2 behind the tractor 2 regardless of the state and posture of the mowing work body 5. As shown in FIG. 8, the entire cylinders 51 and 61 are not limited to the configuration located within the width of the tractor 2. For example, although not shown, a part of the cylinders 51 and 61 protrudes outside the width of the tractor 2. It may be configured.

  In particular, as shown in FIG. 8A, when the mowing working body 5 is in the retracted state, at least the cylinder main body 66 of the second cylinder 61 is positioned behind the tractor 2 and above the mowing working body 5. Further, as shown in FIG. 8B, when the mowing working body 5 is in the offset state, the second cylinder 61 has at least the rod portion 67 located behind the tractor 2 and on the left side of the mowing working body 5. As apparent from FIG. 8, the second cylinder 61 is integrated with the offset frame 4 that is positioned so as to overlap the second cylinder 61 in the rear view in the rear region of the tractor 2. It rotates about the first rotation center axis L1.

  The transmission means 8 includes an input shaft 80 for inputting power from the PTO shaft of the tractor 2 and a first rotation center axis L1 (rotation of the offset frame 4 relative to the body 3 as shown in FIGS. A first transmission shaft 81 that is a transmission shaft in the front-rear direction located on the fulcrum), and a bendable joint 82 that connects the input shaft 80 and the first transmission shaft 81.

  The input shaft 80 is rotatably supported by a bearing portion 83 of the front frame 11 of the body 3. The first transmission shaft 81 is disposed in the fuselage mounting portion 21 of the offset frame 4 and is rotatably supported by a plurality of bearings 84. The axis of the first transmission shaft 81 and the first rotation center axis L1 matches. The first transmission shaft 81 is located above the mowing working body 5 in the retracted state when the mowing working body 5 is in the retracted state.

  The joint 82 is composed of, for example, a double joint having two cross shafts 82a, and is entirely covered with a joint cover 86 whose cross section attached to the rear frame 12 has a downward U-shape. The input shaft 80 is connected to the PTO shaft of the tractor 2 via a joint (not shown).

  The transmission means 8 includes a second transmission shaft 87 that is a transmission shaft in the front-rear direction located on the second rotation center axis L2 (on the rotation fulcrum with respect to the offset frame 4 of the mowing work body 5), and the second transmission shaft 87. A transmission shaft side gear (bevel gear) 88 fixed to the front end portion of the transmission shaft 87 and a rotation shaft side gear fixed to the left end portion of the rotation shaft 41 of the mowing working body 5 and engaged with the transmission shaft side gear 88. (Bevel gear) 89. The second transmission shaft 87, the transmission shaft side gear 88 and the rotary shaft side gear 89 are disposed in the gear case 37 of the frame mounting portion 40 of the mowing working body 5.

  The second transmission shaft 87 is rotatably supported by a plurality of bearings 85, and the axis of the second transmission shaft 87 coincides with the second rotation center axis L2. The rotary shaft 41 of the mowing working body 5 has an insertion portion 41a at its left end inserted into the gear case 37 and rotatably supported by a plurality of bearings 90. The axis of the rotary shaft 41 and the rotation center axis L3 matches. The second transmission shaft 87 and the rotation shaft 41 are located on the same plane in a state where the shaft cores are orthogonal to each other.

  Further, the transmission means 8 includes a first sprocket 91 fixed to the first transmission shaft 81 in the proximal end portion of the offset frame 4 and a second transmission shaft 87 fixed to the second transmission shaft 87 in the distal end portion of the offset frame 4. It has a sprocket 92 and a chain 93 which is an endless transmission member spanned between the two sprockets 91 and 92.

  As shown in FIG. 7, the chain 93 is also urged by a leaf spring 96 which is also stretched over the guide sprocket 94 and the tension sprocket 95 and is a biasing means for applying a desired tension to the chain 93. Has been.

  The offset frame 4 also has the function of a transmission case for storing the transmission means 8, and the transmission shafts 81 and 87, the sprockets 91, 92, 94, 95 and the leaf spring 96 are stored in the offset frame 4. ing. The front end side of the first transmission shaft 81 protrudes from the offset frame 4, and a joint 82 is connected to the protruding portion. Similarly, the front end side of the second transmission shaft 87 also protrudes from within the offset frame 4, and the transmission shaft side gear 88 is fixed to this protruding portion.

  Further, as shown in FIGS. 9 to 12, the airframe 3 having a double frame structure is installed between the front frame 11 and the rear frame 12, and the posture of the mowing work body 5 during operation and lifting (inclination with respect to the front-rear direction). A posture adjusting means 101 as a frame connecting means capable of individually adjusting the posture) is provided.

  The working time of the farming machine 1 (at the time of mowing work) is a working state in which the farming machine 1 is lowered to the lowest position by the three-point link of the tractor 2 and the gauge roller 32 of the mowing work body 5 is in contact with the ground. It is. When the farm work machine 1 is lifted, the farm work machine 1 is raised to a predetermined position (for example, the highest position) by the three-point link of the tractor 2 and the gauge roller 32 of the mowing work body 5 is away from the ground. is there.

  Here, the posture adjusting means 101 has a rod 105 attached to the rod attaching portion 102 of the front frame 11 so as to be pivotable in the vertical direction about the left and right axis 103. Stopper mounting holes 106 are formed at intervals in the longitudinal direction.

  Further, the posture adjusting means 101 has a rotating body (tumbler) 109 that is attached to the left and right opposing plates 108 in the attaching portion 107 of the rear frame 11 so as to be rotatable about a rotation center axis L4 in the left-right direction. The rotating body 109 is formed with a rod insertion hole 110 in a direction orthogonal to the rotation center axis L4. The rod 105 is slidably inserted into the rod insertion hole 110 of the rotating body 109.

  Further, the posture adjusting means 101 is a first stopper 111 that is a first adjusting body for adjusting the posture of the mowing working body 5 during work, and a second stopper for adjusting the posture of the mowing working body 5 during lifting. It has a second stopper 112 that is an adjustment body, and a coil spring (buffer member) 113 that is an elastic body that can be elastically deformed and is positioned between the first stopper 111 and the rotating body 109.

  The first stopper 111 is provided in a portion of the rod 105 positioned forward of the rotating body 109 so that the position of the first stopper 111 can be changed. That is, the first stopper 111 is detachably attached to one stopper attachment hole 106 selected from a plurality (for example, five) of stopper attachment holes 106 formed on the front side of the rod 105. And the attitude | position of the mowing working body 5 at the time of a work changes by the change of the attachment position with respect to the rod 105 of this 1st stopper 111 (change of the stopper attachment hole 106 to attach).

  The second stopper 112 is provided in a portion of the rod 105 located rearward of the rotating body 109 so that the position of the second stopper 112 can be changed. That is, the second stopper 112 is detachably attached to one stopper attachment hole 106 selected from a plurality (for example, nine) of stopper attachment holes 106 formed on the rear side of the rod 105. Then, by changing the mounting position of the second stopper 112 with respect to the rod 105 (changing the mounting stopper mounting hole 106), the posture of the mowing working body 5 at the time of lifting is changed.

  The coil spring 113 is disposed on the outer peripheral side of the portion of the rod 105 located between the first stopper 111 and the rotating body 109. That is, a rod 105 longer than this is inserted through the cylindrical coil spring 113. When the coil spring 113 is in operation, the front end portion is in contact with the first stopper 111 and the rear end portion is in contact with the rotating body 109 to be compressed, thereby biasing the gauge roller 32 to the ground side. Yes.

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

  First, as shown in FIG. 8B, the operator adjusts the left and right positions of the mowing work body 5 of the agricultural machine 1 connected to the three-point link (agricultural machine lifting support device) of the tractor (for example, a small tractor) 2. Thus, the desired offset state (a state in which the mowing work body 5 is located on the outer side of the tire 2a of the tractor 2) is set.

  In addition, the worker sets the posture (the posture with respect to the left-right direction) of the grass cutting work body 5 in the offset state to a desired posture according to the work target surface (ground) on which the grass grows. That is, for example, by operating the second cylinder 61 of the second rotation driving means 7, the mowing work body 5 is rotated about the second rotation center axis L <b> 2, so that the inclination angle θ of the mowing work body 5 in the offset state is set. Adjust.

  After such adjustment, when the farm work machine 1 is moved forward by the travel of the tractor 2, the rotating work means 10 of the mowing work body 5 performs the mowing work while rotating in a predetermined direction by the power from the transmission means 8.

  When the mowing work is completed and the agricultural machine 1 is transported to a desired position by the tractor 2, the first frame 51 is moved to the first rotation center axis L1 by the operation of the first cylinder 51 of the first rotation drive means 6. And the mowing working body 5 is also rotated about the second turning central axis L2 by the operation of the second cylinder 61 of the second turning driving means 7. Return to the storage state.

  As shown in FIG. 8 (a), even when the mowing work body 5 in the horizontal posture is set in the retracted state, the mowing work body 5 in the retracted state can be used for mowing work.

  Here, as shown in FIG. 9 and FIG. 10, when performing the mowing work, the operator changes the mounting position of the first stopper 111 of the posture adjusting means 101 to change the position of the mowing work body 5 during the mowing work ( It is possible to adjust the posture with respect to the front-rear direction.

  That is, for example, as shown in FIG. 9, when the first stopper 111 is installed in the third stopper mounting hole 106 from the front, the position of the mowing working body 5 during the mowing work is the side plate 35 of the working machine body 31. , 36 is set to a posture in which the lower edge 31a of the front and rear is inclined low and high. At this time, the working height (height of the lower end position of the rotary working means 10 from the ground) H of the mowing working body 5 is, for example, about 30 mm.

  For example, as shown in FIG. 10, when the first stopper 111 is installed in the second stopper mounting hole 106 from the front, the posture of the mowing working body 5 at the time of mowing work is the side plate 35 of the working machine body 31. 36, the lower end edge 31a is set in a substantially horizontal posture. At this time, the working height (the height of the lower end position of the rotary working means 10 from the ground) H of the mowing working body 5 is, for example, about 8 mm.

  As described above, the working height H of the mowing working body 5 can be adjusted by changing the mounting position of the first stopper 111 with respect to the rod 105. Therefore, the operator can appropriately adjust the working height H of the mowing work body 5 according to the soil quality of the ground, the type of grass, and the like.

  Further, as shown in FIGS. 11 and 12, when the operator lifts the agricultural machine 1 with the three-point link of the tractor 2, the operator cuts the grass during lifting by changing the mounting position of the second stopper 112 of the posture adjusting means 101. It is possible to adjust the posture of the work body 5 (the posture with respect to the front-rear direction).

  That is, for example, as shown in FIG. 11, when the second stopper 112 is installed in the third stopper mounting hole 106 from the back, when the tractor 2 is lifted by the three-point link (for example, when it is lifted to the highest position) ) Is set to a posture in which the lower end edges 31a of the side plates 35 and 36 of the work machine body 31 are inclined at the front, lower and rear heights. At this time, the lowermost height (the height of the lower end position of the mowing work body 5 from the ground) h of the mowing work body 5 is about 300 mm, for example. In the highest position, the agricultural machine 1 does not interfere with the tractor 2.

  For example, as shown in FIG. 12, when the second stopper 112 is installed in the first stopper mounting hole 106 from the back, when the tractor 2 is lifted by a three-point link (for example, when it is lifted to the highest position) ) Is set to a posture in which the lower edges 31a of the side plates 35 and 36 of the work machine body 31 are substantially horizontal. At this time, the lowermost height (the height of the lower end position of the mowing work body 5 from the ground) h of the mowing work body 5 is about 260 mm, for example.

  As described above, the lowermost height h of the mowing working body 5 can be adjusted by changing the mounting position of the second stopper 112 with respect to the rod 105.

  Therefore, as shown in FIG. 11, if the lowermost height (for example, the lowermost height of the mowing working body 5 in the retracted state) h is increased, for example, entry / exit to / from the field or loading / unloading to / from the truck is performed. In the case of performing, it is possible to prevent the mowing working body 5 from hitting the ground or the like when the tractor 2 is in the backward inclined posture.

  Further, as shown in FIG. 12, if the lowermost height (for example, the lowermost height of the mowing working body 5 in the retracted state) h is lowered, the farm work machine 1 is lifted for turning during the work, for example. It is possible to prevent the rotary working means 10 during high speed rotation from being exposed greatly.

  According to the agricultural machine 1, the machine 3 having a double frame structure changes the posture of the mowing working body 5 during working and the posture of the mowing working body 5 during lifting (non-working) by changing the positions of the stoppers 111 and 112. Since the posture adjusting means 101 that can be individually adjusted is provided, the posture of the mowing working body 5 at the time of working and lifting can be easily adjusted.

  That is, by changing the mounting position of the first stopper 111 with respect to the rod 105, the posture (the lowest position) of the mowing working body 5 at the time of working can be easily adjusted, and thus the working height H of the mowing working body 5 can be easily made. It can be adjusted, and by changing the mounting position of the second stopper 112 with respect to the rod 105, the posture of the mowing work body 5 (the highest position) during lifting can be easily adjusted. h can be adjusted easily.

  On the other hand, since the second rotation drive means 7 has the second cylinder 61 located behind the tractor 2 in both the retracted state and the offset state of the mowing working body 5, the second mowing working body 5 is offset. Even in the state, the second cylinder 61 and the rotating member 62 remain at the rear position of the tractor 2, so that the right and left weight balance is good, and thus the weight balance can be improved.

  The second cylinder 61 of the second rotation driving means 7 is located behind the tractor 2 and above the mowing work body 5 when the mowing work body 5 is in the retracted state, and when the mowing work body 5 is in the offset state. 2 and on the side of the mowing work body 5, the weight balance can be effectively improved.

  Further, the offset frame 4 is provided on the machine body 3 so as to be rotatable in the vertical direction about the first rotation center axis L1, and the mowing work body 5 is provided on the offset frame 4 about the second rotation center axis L2. Since the structure is provided so as to be pivotable in the vertical direction, the length in the front-rear direction is short and the front-rear weight balance is good, and therefore the weight balance can be improved more effectively.

  Further, the transmission means 8 for transmitting power from the tractor 2 side includes a first transmission shaft 81 located on the first rotation center axis L1 and a second transmission shaft 87 located on the second rotation center axis L2. Therefore, the configuration can be simplified, the weight can be reduced and the size can be reduced, and even a small tractor can be used stably. In particular, the mowing work body 5 has fewer parts than the conventional mowing work part, is simple in configuration, and is relatively light.

  In addition, the attitude | position adjustment means 101 of the body 3 of the agricultural machine 1 is not limited to the structure mentioned above, For example, the structure shown in FIG. 13 may be sufficient.

  The posture adjustment means 101 shown in FIG. 13 has an end collar 116 and an adjustment collar 117 instead of the second stopper 112 as a second adjustment body for adjusting the posture of the mowing working body 5 during lifting. ing. Then, by changing the number of adjustment collars 117, the posture (bottom end height) of the mowing working body 5 at the time of lifting can be adjusted.

  For example, although not shown, the posture adjusting means 101 has an end collar and an adjusting collar instead of the first stopper 111 as a first adjusting body for adjusting the posture of the mowing working body 5 during work. But you can.

  Further, for example, a configuration in which the first adjustment body and the second adjustment body are respectively provided on the outer peripheral side of the rod so as to be slidable in the longitudinal direction of the rod may be used.

  Furthermore, the agricultural machine 1 is not limited to a mower, and may be, for example, a hull coater, a ditcher, a tiller, a harvester, or the like.

  Moreover, the agricultural working machine 1 is not limited to a configuration in which the working unit is in a right offset state in which the working unit protrudes to the right with respect to the traveling vehicle. For example, the agricultural working machine 1 is in a left offset state in which the working unit projects to the left with respect to the traveling vehicle. The structure etc. which become may be sufficient.

  Further, the drive member (drive source) of the rotation drive means is not limited to the electric hydraulic cylinder, and may be, for example, a hydraulic cylinder, an electric cylinder, a hydraulic motor, an electric motor, or the like. It may be composed of only the drive member, or may be a drive member connected with an interlocking member.

  Further, the transmission member housed in the offset frame 4 also serving as a transmission case is not limited to an endless member such as a chain or a belt, and may be a transmission shaft or the like.

DESCRIPTION OF SYMBOLS 1 Farm work machine 2 Tractor which is a traveling vehicle 3 Airframe 4 Offset frame 5 Mowing work body which is work body
11 Front frame
12 Rear frame
13 Axis that is the pivot point
32 Gauge roller as a grounding member
101 Posture adjustment means
105 Rod
109 Rotating body
111 1st stopper which is the 1st adjustment body
112 Second stopper as second adjusting body
113 Coil spring which is an elastic body

Claims (6)

A fuselage connected to the traveling vehicle;
The offset frame provided on this aircraft,
A work body provided in the offset frame and in a retracted state and an offset state;
The aircraft is
A front frame coupled to the traveling vehicle;
A rear frame that is rotatable in the vertical direction with respect to the front frame;
Agricultural working machine comprising posture adjusting means that is constructed between the front frame and the rear frame and that can individually adjust the posture of the working body during work and during lifting. Attitude adjustment means
A rod rotatably provided on the front frame;
A rotating body that is rotatably provided on the rear frame, and in which the rod is slidably inserted;
A first adjusting body provided in a portion of the rod located in front of the rotating body, for adjusting the posture of the working body during work;
A second adjusting body that is provided in a portion of the rod that is located behind the rotating body and that adjusts the posture of the working body during lifting;
The agricultural working machine according to claim 1, further comprising an elastic body positioned between the first adjusting body and the rotating body. The agricultural machine according to claim 2, wherein the elastic body of the posture adjusting means is a coil spring disposed on the outer peripheral side of the rod. The farm working machine according to claim 2 or 3, wherein the rod of the posture adjusting means is positioned above the pivot point of the rear frame with respect to the front frame in a side view. The agricultural working machine according to any one of claims 1 to 4, wherein the working body is a mowing working body capable of working in either a horizontal posture or an inclined posture. The agricultural working machine according to claim 5, wherein the mowing working body includes a grounding member that contacts the ground.

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