JP2019010069A - Agricultural implement - Google Patents

Abstract

To provide an agricultural implement capable of improving weight balance.SOLUTION: An agricultural implement 1 includes a machine body 3 connected to a tractor, and an off-set frame 4 is provided on the machine body 3, rotatably in a vertical direction. A mower work body 5 settable both in a storage state and in an off-set state is provided on the off-set frame 4, rotatably in a vertical direction. Further, the agricultural implement 1 also includes transmission means 8 for transmitting power toward the mower work body 5. The transmission means 8 has a transmission shaft positioned on a rotation center axis of the off-set frame 4.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.

JP 2011-103850 A

  However, in the conventional agricultural machine, the offset mechanism (parallel link) is configured to rotate in the horizontal direction, so that there is a problem that the longitudinal length is long and the weight balance is poor.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can aim at the improvement of a weight balance.

  A farm work machine according to the present invention includes a machine body connected to a traveling vehicle, an offset frame provided on the machine body so as to be rotatable in a vertical direction, and a work body provided in the offset frame to be in a storage state and an offset state. And a transmission means for transmitting power toward the working body, the transmission means having a transmission shaft located on the rotation center axis of the offset frame.

  According to the present invention, the weight balance can be improved and the configuration can be simplified.

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.

  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 grass cutting work body 5 is inclined according to the inclined surface (work target surface) inclined with respect to the traveling surface of the tractor 2, so that the grass cutting work on the inclined surface is also possible. 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, although not shown, 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 frame 12 attached to the front frame so as to be rotatable about a left-right axis 13. .

  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 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. A gage roller 32 that is a grounding wheel that contacts the target surface (ground) and a work machine 31 are rotatably provided, and the mowing work (farming work) is performed while rotating about the rotation center axis L3 by the power from the transmission means 8. And rotating work means 10.

  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.

  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 of the mowing working body 5 in the offset state to a desired posture according to the work target surface 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.

  And according to the agricultural work machine 1, since the 2nd rotation drive means 7 has the 2nd cylinder 61 located in the back of the tractor 2 in both the time of the storing state and the offset state of the mowing work body 5, Even when the mowing working body 5 is in the offset 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 agricultural working machine 1 is not limited to a mower, but 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 Machine body 4 Offset frame 5 Mowing work body which is work body 8 Transmission means
21 Airframe attachment
80 input shaft
81 The first transmission shaft, which is the transmission shaft
82 Joint L1 First rotation center axis that is the rotation center axis

Claims (6)

A fuselage connected to the traveling vehicle;
An offset frame provided on the airframe so as to be rotatable in the vertical direction;
A work body provided in the offset frame and in a storage state and an offset state;
A transmission means for transmitting power toward the work body,
The farm work machine characterized in that the transmission means has a transmission shaft located on a rotation center axis of the offset frame. The farm work machine according to claim 1, wherein the offset frame has a machine body attachment portion attached to the machine body so as to be rotatable about a rotation center axis line. The agricultural machine according to claim 2, wherein the transmission shaft of the transmission means is disposed in a machine body mounting portion of the offset frame. Transmission means
An input shaft for inputting power from the traveling vehicle;
It has a joint which connects this input shaft and a transmission shaft. The agricultural work machine as described in any one of Claim 1 thru | or 3 characterized by the above-mentioned. The agricultural work machine according to any one of claims 1 to 4, wherein the transmission shaft of the transmission means is positioned above the work body in the retracted state when the work body is retracted. The agricultural working machine according to any one of claims 1 to 5, wherein the working body is a mowing working body capable of working in either a horizontal posture or an inclined posture.

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