JP6882758B2 - Mower - Google Patents

Description

The present invention relates to a mowing work machine that is mounted on a tractor and has a mowing work unit located behind the tractor to perform mowing work.

As the configuration of the conventional mower, for example, Jitsukaisho 60-133739, "Mowing machine connected to an agricultural tractor" (Patent Document 1), and JP-A-2009-273390, "Mowing work" by the same applicant. "Machine" (Patent Document 2) is disclosed. The mower according to Patent Document 1 is mounted behind a tractor, is provided with two hanging members, and the mowing blade is horizontally rotated to perform mowing work.

Further, the mowing work machine of Patent Document 2 is connected to the rear part of a tractor, which is a traveling vehicle, and discloses a flail mower that performs mowing work while moving forward in a field, a ranch, or the like due to the traveling of the tractor.

Jitsukaisho 60-133739 Japanese Unexamined Patent Publication No. 2009-273390

In the case of a grass-cutting work machine that is mounted behind a traveling machine such as a tractor to perform work, the grass to be cut by the traveling wheel of the traveling machine is pushed forward by moving forward, and the grass is in a prone state and is located behind. There was a problem that uncut parts were left in the mowing work section. The conventional mowers shown in Patent Document 1 and Patent Document 2 have not yet solved such a problem.

From this, it is an object of the present invention to provide a grass cutting work machine which is mounted behind a traveling machine such as a tractor and performs a grass cutting work, and which eliminates the uncut grass leftover of the traveling trace of the tractor traveling wheel. To do.

In order to solve the above problems, the invention according to claim 1 is a mowing work machine mounted behind a tractor to perform mowing work.
A grass raising means is provided in front of the mowing work section and behind the traveling wheel of the tractor.
The grass raising means includes a grass raising roller having a rotation axis in a direction intersecting the traveling direction, and the grass raising roller is provided with a plurality of grass raising members radially with respect to the rotation axis. The grass-raising roller is characterized in that it rotates at a speed faster than the traveling speed of the tractor by rotating with the power from the drive wheels that rotate on the ground as the tractor travels, causing grass. We propose a mowing work machine.

According to the present invention, the grass raising means provided in front of the mowing work portion and behind the traveling wheel of the tractor causes the grass to fall down by the tractor traveling wheel, so that the grass is mowed in the mowing working portion located behind. The residue is eliminated.

It is a side view which made a part of the mowing work machine of the Example of this invention. It is a top view of the mower of the Example of this invention. It is a side view of the mower of another embodiment of this invention. It is a top view of the mower of another embodiment of this invention.

An embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view showing a partial cross section of the mower according to the embodiment of the present invention, and FIG. 2 is a plan view of the same. In the description of this example, the left side of FIGS. 1 and 2 will be described as the front side in the work progress direction.

The mowing work section of the mowing work machine in this example describes the case of a flail mower in which a large number of mowing blades are radially provided on a horizontal rotation axis orthogonal to the traveling direction to mow the grass. The present invention can also be applied to a mower having a horizontally rotating cutting blade.

On the front side of the mowing work portion 20, a mounting portion for mounting on the tractor 1 which is a traveling machine is provided. A three-point link mechanism for mounting a work machine is provided on the tractor 1 side at the rear, and the mounted work machine can be connected up and down freely. In the three-point link mechanism, a top link 12 is vertically rotatable at an upper center portion, and a pair of left and right lower links 11 are vertically rotatable below. The mower 2 is mounted via a quick hitch 15, which is a connecting frame connected to the rear ends of the top link 12 and the lower link 11, respectively.

The quick hitch 15 is attached to a three-point link mechanism by connecting the upper center portion with the top link 12 and the top link pin 14 and connecting the lower left and right sides with the lower link 11 by the lower link pin 13. A hook 151 opened upward is provided on the rear side in the upper center portion of the quick hitch 15, and the hook 151 is engaged with a top pin 16 horizontally provided above the center portion on the mowing work portion 2 side. .. Further, on the lower left and right portions, a U-shaped groove portion opened to the rear side for engaging with the horizontal lower pins 17 and 17 provided on the mowing work portion 2 side, and the engaged lower pins 17 and 17 Rotating hooks 150 and 150 are provided to prevent the hooks from coming off.

To connect the tractor 1 and the mowing work machine 2, the hook 151 of the quick hitch 15 attached to the tractor 1 side is engaged with the top pin 16 on the mowing work machine 2 side so as to scoop up from below, and the lower pin on the lower side is engaged. 17 and 17 are pulled toward the quick hitch 15 side and engaged with the U-shaped groove. Then, the rotating hooks 150 and 150 are used to prevent them from coming off and to connect them. When releasing the connection, the rotating hooks 150 and 150 are released in the reverse order, and when the mower 2 is lowered to the ground surface, the lower pins 17 and 17 are separated rearward, and the top pin 16 is further separated from the hook 151. The connection is released at a distance.

An input case 25 is provided at the center front portion of the mower 2 and an input shaft (not shown) is projected to the front side. The input shaft is connected to the PTO shaft on the tractor 1 side by a universal joint 5, and power is input from the tractor 1 side. The direction of the input power is changed by the bevel gear in the input case 25, and the input power is transmitted to the transmission case 27 provided at the left end in the traveling direction in this example by the output shaft inserted in the pipe frame 26 provided horizontally on the left and right. Will be done. The output shaft and the V pulley provided at the end of the cutting blade shaft 200 below the output shaft are fixedly provided in the transmission case 27, and the power is supplied by the V belt over the V pulley. Is transmitted to and rotated.

The cutting blade shaft 200 is a horizontal axis orthogonal to the traveling direction, and a large number of cutting blades 201 are provided radially in the axial direction. The cutting blade shaft 200 in this example is rotated so as to scoop up in the traveling direction to perform the mowing work. The cutting blade shaft 200 is rotatable while the transmission case 27 side and the other side plate 28 side are held by bearings, and the upper portion is covered with a cutting blade shaft cover 29 for preventing scattering.

Behind the mowing work unit 20, a pair of left and right gauge rings 21 for adjusting the height of the mowing work unit 20 from the ground surface to adjust the mowing height are provided. The height of the gauge wheels 21 and 21 is adjusted by connecting the gauge wheel frame 23 holding the gauge wheels 21 and 21 to the mowing work section 20 side so as to be vertically rotatable, and also above the mowing work section 20 side. The rear end of the height adjusting rod 24 having one end on the front side rotatably connected to the gauge wheel frame 23 is connected to the gauge wheel frame 23 so as to be vertically rotatable, and the height adjusting rod 24 is expanded and contracted. Male and female screws are screwed into the height adjusting rod 24, and when the handle 22 provided at the front end portion is rotated, the screw portion advances and retreats to expand and contract. When the handle 22 is rotated and the height adjusting rod 24 is extended, the gauge wheel frame 23 to which the gauge wheels 21 and 21 are attached rotates downward, and the mowing work portion 20 rises with respect to the ground surface to increase the mowing height. It gets higher. On the contrary, when the height adjusting rod 24 is shortened, the cutting height is lowered. The gauge wheels 21 and 21 are rotatably provided on the horizontal rotation axis, and are held by the horizontal rotation axis in the vertical direction eccentric from the rotation axis, and are provided in a caster ring shape.

A pair of left and right grass raising means 3 for raising the grass that has fallen down by the tractor traveling wheel 10 are provided at the front position of the grass cutting work portion 20 and at the rear portion of the traveling wheel 10 of the tractor 1. Since the left and right grass raising means 3 and 3 are symmetrical, one of the grass raising means will be described. The grass raising means 3 and 3 are attached and held by a slide bracket 39 to a connecting frame 36 composed of square pipes provided parallel to the front of the pipe frame 26. The slide bracket 39 is provided by fastening so as to sandwich the connecting frame 36. The connecting frame 36 is provided so as to be bridged between the transmission case 27 side and the other side plate 28 side. The left and right positions can be adjusted by loosening the fastening of the slide bracket 39 and changing the mounting position on the connecting frame 36, and it can be adjusted according to the position of the traveling wheel 10 of the tractor 1 to be mounted. ..

The grass raising means 3 includes a grass raising roller 30 having a rotation axis 35 in a direction intersecting the traveling direction, a drive wheel 32 provided on the side of the grass raising roller 30, and the drive wheel 32. The chain case 33 that connects the grass raising roller 30 and the grass raising roller 30, and the first support arm 34 and the second support arm 38 for holding the grass raising roller 30 part and the drive wheel 32 part on the grass cutting work part 20 side. Consists of.

The grass raising roller 30 is provided with a cylinder concentric with respect to the rotating shaft 35, and is provided with a plurality of grass raising members 31 radially on the outer circumference of the cylinder, and rotates at a speed faster than the traveling speed of the mounted tractor 1. Causes grass. The grass raising member 31 is made of an elastic member of a wire rod, and is radially attached to the outer periphery of the cylinder of the grass raising roller 30 to form a brush shape. In this example, the grass raising member 31 is made of an elastic member such as a resin material.

The drive wheel 32 provided on the side of the grass raising roller 30 has a cylindrical shape attached to a rotating shaft provided in parallel with the rotating shaft 35 of the grass raising roller 30, and has a cylindrical outer circumference. A plurality of rod-shaped protrusions 320 are provided radially. The protrusion 320 pierces the ground surface with which it comes into contact, and the drive wheel 32 rotates as the tractor 1 advances. The drive wheel 32 and the grass-raising roller 30 are connected by a chain case 33, and the rotation of the drive wheel 32 is transmitted to the grass-raising roller 30 by an inserted roller chain (not shown). The rotation speed of the grass raising roller 30 sets the number of teeth of the sprocket over which the roller chain in the chain case 33 is laid so as to rotate at a speed faster than the traveling speed of the mounted tractor 1.

A first support arm 34 and a second support arm 38 are provided to hold the grass raising roller 30 part and the drive wheel 32 part and hold them on the grass cutting work part 20 side. The first support arm 34 is composed of a pipe-shaped member that holds the grass raising roller 30 part rotation shaft 35 and extends diagonally rearward toward the upper side, and is provided on the left and right sides of the grass raising roller 30. The upper side of each is held by the slide bracket 39 on the mowing work portion 20 side so as to be slidable in the axial direction. A spring 37 is inserted into the first support arm 34 between the mowing work portion 20 side and the grass raising roller 30 portion side, and the grass raising roller 30 portion is in a state of being urged downward. The structure is such that the raising roller 30 can follow the unevenness of the ground surface. The upper ends of the first support arm 34 are connected by connecting plates 41 spanning left and right. Further, the second support arm 38 is made of a round pipe material, one end of which is connected to the drive wheel 32 side of the chain case 33, and the other end of which is slidable axially to the slide bracket 39. It is held below 34. A spring 40 is inserted between the slide bracket 39 and the chain case 33 in the second support arm 38, and the drive wheel 32 side is urged downward. As the tractor 1 advances, the drive wheels 32 in contact with the ground surface rotate, and the roller chain in the chain case 33 causes the rotational force to be transmitted to the rollers 30 to rotate at a speed faster than the traveling speed, and the grass. The raising member 31 scrapes the grass that has fallen forward and stands up to the rear side. The grass that has been scraped up is cut by the cutting blade 201 located immediately after. The grass raising roller 30 may not only be rotated by a rotation axis orthogonal to the traveling direction, but may also be rotated in a state of being tilted in a plan view.

3 and 4 show a mode of a grass cutting work machine according to another embodiment of the grass raising means. FIG. 3 is a side view showing a partial cross section of the mower according to the embodiment of the present invention, and FIG. 4 is a plan view of the same. In the description of this example, the left side of FIGS. 3 and 4 will be described as the front side in the work progress direction. Further, the same parts as the above-mentioned grass raising means are indicated by the same reference numerals.

A pair of left and right grass raising means 3'in another embodiment are provided at the front position of the mowing work portion 20 and at the rear portion of the traveling wheel 10 of the tractor 1. Since the left and right grass raising means 3'and 3'are symmetrical, one of the grass raising means will be described. The grass raising means 3'and 3'are attached and held by a slide bracket 39 to a connecting frame 36 composed of square pipes provided parallel to the front of the pipe frame 26. The slide bracket 39 is provided by fastening so as to sandwich the connecting frame 36. The connecting frame 36 is provided so as to be bridged between the transmission case 27 side and the other side plate 28 side. The left and right positions can be adjusted by loosening the fastening of the slide bracket 39 and changing the mounting position on the connecting frame 36, and it can be adjusted according to the position of the traveling wheel 10 of the tractor 1 to be mounted. ..

The grass raising means 3'includes a grass raising roller 30' having a rotation axis 35 in a direction intersecting the traveling direction, a drive wheel 32 provided on the side of the grass raising roller 30', and the like. A chain case 33 for connecting the drive wheel 32 and the grass raising roller 30, and a first support arm 34 and a first support arm 34 for holding the grass raising roller 30'and the drive wheel 32 on the grass cutting work part 20 side. It is composed of two support arms 38.

The grass raising roller 30'is provided with a cylinder concentric with respect to the rotating shaft 35, and a plurality of grass raising members 31' are provided radially on the outer circumference of the cylinder at a speed faster than the traveling speed of the mounted tractor 1. Rotate and cause grass. The grass raising member 31'is made of a wire rod such as spring steel, and is radially attached to the outer periphery of the cylinder of the grass raising roller 30'. The base of the grass raising member 31'is fixed to the outer circumference of the cylinder, is attached radially around the rotation shaft 35, the vicinity of the base side is curled, and the tip portion in contact with the ground surface is easily flexed. It has become so.

The drive wheel 32 provided on the side of the grass raising roller 30'is cylindrical and is attached to a rotating shaft provided parallel to the rotating shaft 35 of the grass raising roller 30'. A plurality of rod-shaped protrusions are provided radially on the outer circumference. The protrusions pierce the ground surface with which they come into contact, and the drive wheels 32 rotate as the tractor 1 advances. The drive wheel 32 and the grass-raising roller 30'are connected by a chain case 33, and the rotation of the drive wheel 32 is transmitted to the grass-raising roller 30' by an inserted roller chain (not shown). The rotation speed of the grass raising roller 30'sets the number of teeth of the sprocket over which the roller chain in the chain case 33 is laid so as to rotate at a speed faster than the traveling speed of the mounted tractor 1.

A first support arm 34 and a second support arm 38 are provided to hold the grass raising roller 30'and the drive wheel 32 on the grass cutting work portion 20 side. The first support arm 34 is composed of a pipe-shaped member that holds the grass raising roller 30'part rotation shaft 35 and extends diagonally rearward toward the upper side, and is left and right with the grass raising roller 30' sandwiched between them. A pair are provided, and the upper side thereof is held by the slide bracket 39 on the grass cutting work portion 20 side so as to be slidable in the axial direction. A spring 37 is inserted into the first support arm 34 between the mowing work portion 20 side and the grass raising roller 30'part side, and the grass raising roller 30' portion is urged downward. The structure is such that the grass raising roller 30'part can follow the unevenness of the ground surface. The upper ends of the first support arm 34 are connected by connecting plates 41 spanning left and right. Further, the second support arm 38 is made of a round pipe material, one end of which is connected to the drive wheel 32 side of the chain case 33, and the other end of which is slidable axially to the slide bracket 39. It is held below 34. A spring 40 is inserted between the slide bracket 39 and the chain case 33 in the second support arm 38, and the drive wheel 32 side is urged downward. As the tractor 1 advances, the drive wheels 32 in contact with the ground surface rotate, the rotational force is raised by the roller chain in the chain case 33 and transmitted to the rollers 30', and the drive wheels 32 rotate at a speed faster than the traveling speed. The grass raising member 31'scrapes the grass that has fallen forward and stands up to the rear side. The grass that has been scraped up is cut by the cutting blade 201 located immediately after.

INDUSTRIAL APPLICABILITY The present invention can be used for a mowing work machine that is mounted behind a traveling machine such as a tractor to perform mowing work.

1 Tractor 10 Running wheel 11 Lower link 12 Top link 13 Lower link pin 14 Top link pin 15 Quick hitch (connecting frame)
16 Top pin 17 Lower pin 2 Mowing work machine 20 Mowing work part 200 Mowing blade shaft 201 Mowing blade 21 Gauge wheel 22 Handle 23 Gauge wheel frame 24 Height adjustment rod 25 Input case 26 Pipe frame 27 Transmission case 28 Side plate 29 Mowing blade shaft cover 3 Grass raising means 30 Grass raising roller 31 Conical rotating body 32 Drive wheel 33 Chain case 34 1st support arm 35 Rotating shaft 36 Connecting frame 37 Spring 38 2nd support arm 39 Slide bracket 40 Spring 41 Connecting plate 5 Universal joint

Claims (1)

In a mower that is mounted behind the tractor and performs mowing work,
A grass raising means is provided in front of the mowing work section and behind the traveling wheel of the tractor.
The grass raising means includes a grass raising roller having a rotation axis in a direction intersecting the traveling direction, and the grass raising roller is provided with a plurality of grass raising members radially with respect to the rotation axis. The grass-raising roller is characterized in that it rotates at a speed faster than the traveling speed of the tractor by rotating with power from a drive wheel that rotates on the ground as the tractor travels, causing grass. Mowing work machine.

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