JP5812315B2 - Mowing machine - Google Patents

Description

  The present invention relates to an agricultural machine that is attached to a tractor and performs mowing work.

  Japanese Utility Model Laid-Open No. 5-95242 (Prior Art 1) is disclosed as a prior art of this type of reaping device.

  Japanese Utility Model Laid-Open No. 5-95242 (Prior Art 1) states that “an anti-scattering plate is slidably suspended on the front side of a rotary mower with a plurality of mowing blades housed therein rotatably. In the rotary grass mower slightly behind the suspending position of the anti-scattering plate, a roller-type ruler wheel having a length substantially the same as the cutting width is horizontally mounted so as to be adjustable up and down. Disclosure of a “scattering prevention device in a rotary mower” is disclosed.

Japanese Utility Model Publication No. 5-95242 (prior art 1)

  In the case of a mowing work machine mounted on a tractor, the work is performed in accordance with the desired height of the cutting work part. For this reason, it attaches to the three-point link mechanism of the attachment part of the tractor which is a work vehicle like the prior art 1, raises and lowers the mowing machine up and down, and sets the roller ruler wheel on the grounding part opposite to the attachment part. The height is adjusted by adjusting the height. However, in the case of such a roller type, dirt and other foreign matter are likely to adhere to the outer periphery of the roller because it is grounded and rotating, and the roller diameter becomes large and the height becomes unstable and dragging due to poor rotation. Such problems occur.

  In the case of the prior art 1, a roller ruler wheel for height adjustment is provided in the forward direction, but in such a case, since the grass before cutting is crushed by the roller and cut, the uncut residue remains. It tends to occur, especially when the grass is long, so that the mowing blade passes through the blade while it is restrained by a roller. For this reason, the height adjusting roller is provided behind the cutting portion in the traveling direction. However, in such a case, wet dust or the like of grass shredded at the cutting portion together with soil and foreign matter on the ground surface is more likely to adhere to the outer periphery of the roller, and the roller diameter is increased. The same inconvenience occurs.

  Therefore, an object of the present invention is to provide a mowing machine capable of performing a stable work without foreign matter such as soil adhering to a gauge roller that stabilizes the height of a cutting work part.

In order to solve the above problems, a mounting portion provided in a front portion for mounting on a tractor that is a traveling machine body, a cutting rotor having a plurality of cutting blades on a horizontal rotation shaft that is rotated by power from the tractor, and A cutting part cover that covers the upper part of the cutting rotor; a side plate that supports the left and right ends of the cutting rotor; and a cutting plate that is provided behind the cutting rotor and is held by the left and right side plates with a horizontal rotation axis. In a mowing working machine having a cylindrical roller type gauge roller that stabilizes the height of the cutting work part by touching the surface of the cutting ground with a width approximately the same as the rotor, the gauge roller is attached to the outer periphery of the gauge roller. A scraper is provided to remove the generated foreign matter, and the scraper has a plate shape parallel to the length direction of the gauge roller and having an end surface along the outer periphery of the gauge roller. The end face of Jirora side is provided continuously corrugated notch, scraping the foreign matter attached to the gauge roller periphery by uneven top, upon contact with the ground the foreign matters roller periphery became uneven shape We propose a mowing machine characterized by a structure that does not peel off due to the resistance of the material.

  According to the present invention, the scraper has a plate shape parallel to the length direction of the roller along the end surface of the roller, and the end surface on the gauge roller side of the scraper is continuously provided with uneven notches. As a result, foreign matter adhering to the outer periphery of the gauge roller is scraped off by the top of the unevenness, and the top is easy to bite into the attached foreign matter, so there is little resistance, and the foreign matter on the outer periphery of the roller that has become uneven is It is easy to peel off with resistance, and it is rare to enlarge. In addition, the uneven notch structure is simple and easy to maintain, and the production cost can be kept low.

The side view of the mowing working machine which implemented this invention. The top view of the state which located the mowing working machine which implemented this invention behind the tractor. The top view of the state which offset the mowing working machine which implemented this invention to the tractor side. The principal part front view of a mowing work part. The principal part side view which cut and cut the cutting work part. The principal part rear view which carried out the cross section of a part of gauge roller. Another example of the shape of the end of the scraper.

  Embodiments of the present invention will be described below with reference to the following drawings. FIG. 1 is a side view of a mowing work machine according to the present invention, FIG. 2 is a plan view of the mowing work machine located behind the tractor, and FIG. 3 is a state in which the mowing work machine is also offset to the tractor side. FIG. 4 is a front view of the main part of the cutting part, FIG. 5 is a side view of the main part of the cutting part, FIG. 6 is a rear view of the main part of the gauge roller, and FIG. 7 is a scraper. FIG. 9 shows another embodiment of the shape of the end portion.

  The mowing work machine shown in this example is mounted on a three-point link hitch mechanism provided at the rear of the tractor 1 and is used by driving the mowing work unit 5 with power from the tractor 1. Further, the mowing operation unit 5 is provided so as to be movable to the left and right with respect to the tractor 1 and can be operated on one side of the rear side of the tractor 1. It is possible to carry out forward cutting without stepping on.

  The mowing working machine of this example is provided with a mounting portion 2 for mounting to the tractor 1 at the front portion, and a mowing operation portion 5 is provided behind the mounting portion 2, and the mounting portion 2 and the mowing work portion 5 are offset mechanism portion 6. It is connected through. The offset mechanism unit 6 is configured by a parallel link in a plan view, and the front end of the parallel link is rotatably connected to the mounting unit 2 side, and the rear end side thereof is rotatably connected to the mowing work unit 5 side. Even if it moves to the left or right, the orthogonal posture is not changed with respect to the traveling direction.

  A three-point link hitch mechanism comprising a pair of left and right lower links 11 provided at the rear of the tractor 1 and a top link 10 provided at the upper center thereof is provided at the lower left and right of the mounting portion 2 provided in front of the mowing machine. The lower link pin 20 is connected to the lower link 11 and the top link pin 21 provided on the top of the mast frame 22 formed in a gate shape from the left and right lower link pin 20 portions. A mowing machine is attached to the tractor 1.

  The mowing working unit 5 is provided with a bevel gear case 3 which is a power input unit provided on one side upper side of the mowing working unit, and an input shaft 30 projecting forward from the bevel gear case 3 and the figure. A tractor PTO shaft (not shown) is connected by a universal joint 12, and power is taken out from the tractor 1 and driven.

  The bevel gear case 3 converts and shifts the power input to the input shaft 30 in the lateral direction of the traveling direction by an internal bevel gear. The converted power is transmitted from one side of the bevel gear case 3 to the side end of the cutting unit 5 by the horizontal output shaft 32. An output pulley is fixed to the distal end of the output shaft on the side end side, and further, an input pulley fixed to the end of the rotary shaft 50 of the cutting operation unit 5 is provided below the output pulley. The power input to the input shaft 30 by the transmission belt stretched around the pulley is transmitted to the rotary shaft 50 of the cutting work unit 5 and is driven to rotate. The pulley and the transmission belt portion are covered and guarded by a belt cover 4.

  The mowing operation unit 5 has a mowing rotor 56 in which a plurality of mowing blades 51 are swingably provided on a rotary shaft 50 in a horizontal direction perpendicular to the traveling direction of the tractor, and this is trimmed above the rotary shaft 50. Rotate the grass so that it passes from the front to the back so that the grass will pass through. The upper part of the outer periphery of the cutting blade 51 rotation trajectory is covered with a cutting unit cover 52 to prevent scattering of the cut weeds and the like, and to move some of the cut weeds around the rotating shaft 50. It is provided to be further crushed finely.

  A gauge roller 7 is provided in the lower rear part of the cutting work unit 5, and the ground level on the rear side of the cutting work unit 5 is maintained by contacting the ground surface during the work. The gauge roller 7 is provided in a cylindrical shape having a length substantially equal to the cutting rotor 56, and the left and right end portions of the cutting work portion 5 are rotated via bearings 72 on a mounting plate 70 extending rearward from the left and right side plates 55. It is held freely. A plurality of attachment holes 70 for attachment to the side plate 55 are provided, and the height of the cutting portion 5 is adjusted by selecting and attaching the attachment hole positions.

  A scraper 71 is provided on the rear side of the gauge roller 7 with its end face approaching the outer peripheral surface. The scraper 71 is composed of a plate-shaped member having an inverted L shape in side view, and is substantially the same in the length direction of the gauge roller 7. It is provided parallel to the length. The scraper 71 is used to scrape off dirt, foreign matter, or grass crushed by the mowing operation section from adhering to the outer peripheral surface when the gauge roller 7 contacts and rotates on the ground surface during work. In this example, the left and right sides are attached to and held by the mounting plate 70 with one end surface of the scraper 71 facing the rear tangential direction of the outer periphery of the gauge roller 7. The attachment portion is a long hole, and is attached by tightening with a bolt, but the gap between the end surface of the scraper 71 and the outer peripheral surface of the gauge roller 7 is adjusted by adjusting the position of the long hole.

  The end surface of the scraper 71 on the gauge roller 7 side is provided with an uneven cutout portion continuously across the width direction of the gauge roller 7. In this example, the uneven cutout 710 is provided in a jagged shape as shown in FIG. As another example of the concave and convex notch, a shape as shown in FIG. 7 is also possible. (A) shows a concave portion having an arc shape, and (b) shows a concave portion and a convex portion having a trapezoidal shape. Yes. When the end surface is linear, foreign matter enlarged over the entire width of the gauge roller 7 is fixed to the gauge roller 7 to the flat end, and the roller diameter is not scraped off any more. It becomes impossible to release the enlarged state. If the end surface of the scraper 71 is too close, the resistance increases in the rotational direction, and a drag phenomenon may occur. By making the end surface uneven, foreign matter attached to the outer circumference of the gauge roller is scraped off by the top of the unevenness, and the top is easy to bite into the attached foreign matter, so there is little resistance, and foreign matter on the outer periphery of the roller that has been scraped off to become uneven Is easy to peel off due to the resistance at the time of contact with the ground.

  The offset mechanism unit 6 that moves the mowing unit 5 to the left and right is connected to the mounting unit 2 so that the front end side is horizontally rotatable and extends rearward, and one end rotates to the mounting unit side. An offset electric cylinder 63 that is horizontally connected to the moving arm 60 side and rotates the rotating arm 60 in the horizontal direction by its extending and contracting operation, and the cutting working unit 5 on the rotating end side of the rotating arm 60. The rotary arm 60 is provided in a pair parallel to the left and right, the front end is on the mounting portion 2 side, and the rear end side is on the cutting work portion holding bracket 64 on the cutting work portion 5 side. Each of them is connected by a front rotation shaft 61 and a rear rotation shaft 62 provided in the vertical direction to form a parallel link, and the cutting work section 5 is located on the side of the tractor shown in FIG. 3 from the rear position of the tractor shown in FIG. ~ side Orthogonal orientation of the cutting work portion against horizontal movement direction of travel be made towards is configured not to change. Since it is composed of an offset mechanism using parallel links, the structure is simple and the manufacturing cost can be reduced.

  The mowing work unit holding bracket 64 is held by a vertical rear rotating shaft 62 on the rotating end side of the rotating arm 60 to form a parallel link mechanism so as to be horizontally rotatable and parallel to the traveling direction. The cutting unit rotating shaft 53 provided horizontally holds the cutting unit 5 so as to be rotatable in the vertical direction on a surface orthogonal to the traveling direction. The mowing unit rotating electric cylinder 54 is connected to the mowing unit 5 side and the mowing unit holding bracket 64 side so that both ends of the mowing unit can be rotated. The working unit 5 can be rotated up and down around the cutting unit rotating shaft 53. By rotating the mowing operation unit 5 up and down, weeds and the like on an inclined surface that is inclined sideways up and down with respect to the traveling surface of the tractor 1 can be mowed.

  The offset mechanism portion 6 is connected to the mounting portion 2 on the front end side through a connection bracket 23 to a lower portion on the left and right sides of the mast frame 22 formed in the portal shape of the mounting portion 2. The rotary arm 60 is held on the rear side by a front rotary shaft 61 provided in the vertical direction, and one end on the front side of the connecting bracket 23 is held by the horizontal vertical rotary shaft 230 orthogonal to the traveling direction. The mast frame 22 is connected to the mast frame 22 so as to be rotatable in the front-rear direction. The front / rear rotation angle is regulated within a certain range, so that the mowing work part 5 can swing back and forth within a certain range with respect to the mounting part 2 and can follow the unevenness of the working field during work. Has been.

  A lower restricting means 8 for preventing the mounting portion 2 from being lowered too much at the lower portion on one side of the left and right sides of the mast frame 22 formed in the gate shape of the mounting portion 2, which is opposite to the connecting bracket 23 mounting side. The upper end side of the guide shoe 80 formed of a pipe material in an L shape in a side view is attached to a holder 81 formed in the shape of a vertical pipe fixedly provided on the mast frame 22 in the vicinity of the lower link pin 20. The lowering restricting means 8 is configured by being inserted and held by a fixing pin, and provided so that the other end on the lower side is slid on the field scene. Vertical adjustment can be performed by providing an adjustment hole in the guide shoe 80 so that the insertion position of the fixing pin can be changed. In this example, the guide shoe 80 is not provided on the connection bracket 23 side, but it may be provided on the left and right of the mast frame 22, and the lower sliding portion of the guide shoe 80 is a rotating body such as a gauge wheel. You may comprise.

  A gauge roller 7 that stabilizes the cutting height is provided at the lower rear part of the cutting work unit 5, and a lowering restricting means 8 that controls the lowered position of the mounting unit 2 is provided in the mounting unit 2. This stabilizes the posture in the front-rear direction of the mowing unit 5 provided between the rear gauge roller 7 and the front lowering restricting means 8.

  If the mounting portion 2 held by the three-point link mechanism of the tractor 1 is lowered too much, the posture of the mowing operation portion 5 is inclined forward, and there arises a disadvantage that the mowing height and the mowing performance are affected. During the work, it is necessary to frequently raise and lower the mowing work machine by changing the direction, etc., and it is necessary to adjust the descent position each time, and it is difficult to determine the descent position from above when riding on the tractor, and it is difficult to adjust By providing the descending restricting means 8, it is possible to easily adjust the descending position, improving the working efficiency and sufficiently exhibiting the performance of the mowing machine without requiring skill.

  Next, the operation of the mowing machine according to the present invention will be described. Mounted on the tractor 1 by the mounting portion 2 provided at the front portion of the mowing working machine, the input shaft 30 of the bevel gear case 3 provided on the side upper portion of the mowing working portion 5 and the tractor PTO shaft are connected by the universal joint 12, It is rotated by the power from the tractor 1. The power of the input shaft 30 is converted by the bevel gear inside the bevel gear case 3 and the rotational power is converted and shifted in the lateral direction of the traveling direction, and the power is transmitted to the side end side by the output shaft 32. An output pulley is fixed to the tip of the output shaft 32 at the side end opposite to the bevel gear case 3, and an input pulley fixed to the end of the rotary shaft 50 of the mowing operation unit 5 is provided below the output pulley. The power is transmitted to the rotary shaft 50 of the mowing unit 5 and is driven to rotate by the transmission belt that is stretched around these pulleys. The rotary shaft 50 is provided with a plurality of cutting blades 51 in a swingable manner so that weeds and the like that have been cut pass through the rotary shaft 50 so as to scoop up from the front to the rear, The weeds are cut and crushed by the progress of the tractor. The upper part of the outer periphery of the cutting locus of the cutting blade 51 is covered with the cutting portion cover 52 to prevent scattering of cut weeds and the like, and a part of the cut weeds is rotated by the action of the scooping surface of the cutting blade 51. Bring it around the shaft 50 to crush it further.

  The mowing operation part 5 performs the work by adjusting the offset position from the tractor 1 by moving the offset electric cylinder 63 of the offset mechanism part 6 with respect to the mounting part 2 to move left and right. By cutting the tractor 1 from the tire side of the tractor 1 and moving the tractor 1 on the field surface after cutting the tractor 1, the cutting unit 5 is positioned on the uncut portion and the operation is performed. However, it is possible to prevent occurrence of uncut residue caused by stepping over weeds or the like in an unworked part.

  By offsetting the cutting work part 5 from the side of the tire of the tractor 1 and further extending and retracting the cutting part rotating electric cylinder 54 to rotate the cutting work part 5 up and down in the direction perpendicular to the traveling direction, The mowing work of the slope of the side part inclined up and down with respect to the traveling surface of the tractor 1 becomes possible.

  When the mowing operation part 5 is lowered by the three-point link of the tractor 1 to be in the working state, the mowing work part is lowered by lowering the three-point link to a position where the lower end of the guide shoe 80 of the lowering restricting means 8 is in contact with the field scene. 5 working posture is determined. The gauge roller 7 provided at the rear of the mowing operation unit 5 maintains the mowing operation unit 5 at a stable height without foreign matter or the like adhering to the outer periphery of the roller by the scraper 71.

  The present invention is used for an agricultural machine for mowing work that is mounted and used behind a tractor that is a traveling machine.

DESCRIPTION OF SYMBOLS 1 Tractor 10 Top link 11 Lower link 12 Universal joint 2 Mounting part 20 Lower link pin 21 Top link pin 22 Mast frame 23 Connection bracket 230 Vertical rotation shaft 3 Bevel gear case 30 Input shaft 32 Output shaft 4 Belt cover 5 Cutting part 50 Rotating shaft 51 Mowing blade 52 Mowing portion cover 53 Mowing portion rotating shaft 54 Mowing portion rotating electric cylinder 55 Side plate 56 Mowing rotor 6 Offset mechanism portion 60 Rotating arm 61 Front rotating shaft 62 Backward rotating shaft 63 For offset Electric cylinder 64 Mowing holder holding bracket 7 Gauge roller 70 Mounting plate 71 Scraper 710 Concavity and convexity notch 72 Bearing 8 Lowering restricting means 80 Guide shoe 81 Holder

Claims (1)

A mounting portion provided at a front portion for mounting on a tractor that is a traveling machine body, a cutting rotor having a plurality of cutting blades on a horizontal rotating shaft that is rotated by power from the tractor, and an upper portion of the cutting rotor is covered. A cutting part cover, a side plate that supports the left and right ends of the cutting rotor, and a width that is provided behind the cutting rotor and that is held by the left and right side plates with a horizontal rotation axis and is approximately the same length as the cutting rotor. In a mowing working machine having a cylindrical roller type gauge roller that contacts the mowing ground surface and stabilizes the height of the mowing working part,
The gauge roller is provided with a scraper that removes foreign matters adhering to the outer periphery of the gauge roller, and the scraper has a plate shape parallel to the length direction of the gauge roller and having an end surface along the outer periphery of the gauge roller. the end surface of the side is provided continuously corrugated notch, the uneven top scraping foreign substances adhering to the gauge roller periphery, the roller periphery became uneven foreign matter of the ground contact time of A mowing machine characterized by a structure that does not peel off by resistance and does not enlarge .