JP5531847B2 - Mowing machine and mowing equipment - Google Patents

Description

  The present invention relates to a mower and a mowing tool.

  Conventionally, a management machine having a configuration using a cutting rotary blade that is also used for plowing and mowing has been proposed (see, for example, Patent Document 1).

  FIG. 14 is a side view showing a configuration of a conventional management machine. As shown in FIG. 14, an engine 1011 is provided on the upper part of a mission case 1002 having traveling wheels 1001, and a rotary work machine 1022 is provided in front of the mission case 1002. A gauge wheel 1032 is provided in front of the rotary work machine 1022 so as to be adjustable in height, and the rotary work machine 1022 is switched between the tillage height and the mowing height by adjusting the height of the gauge wheel 1032.

  The rotary working machine 1022 is provided with a rotary blade 1024. The rotary blade 1024 rotates counterclockwise in the figure (rotation direction of the traveling wheel 1001 during forward movement) when plowing, and clockwise in the figure when mowing. Control is performed so as to rotate. Further, during mowing, control is performed so that the rotary blade 1024 is rotated at a higher speed than during plowing.

Japanese Patent Laid-Open No. 2002-84812

  As described above, in the tilling work and the mowing work, it is necessary to change the rotational direction of the rotary blade 1024 and also the rotational speed. This complicates the structure of the variable speed mechanism including the control function.

  An object of the present invention is to provide a mowing machine and a mowing tool having a simple configuration in consideration of the above-described conventional problems.

In order to achieve the above object, the first present invention provides:
The body,
Wheels,
A main shaft connected to the main body for a tilling claw of a tiller;
A drive unit provided in the main body for rotating the spindle at a rotational speed for tillage;
A rotary blade for mowing that is disposed in front of the main shaft, is configured to have substantially the same width as the main shaft, and is driven to rotate about a horizontal axis;
A rotation amplifying mechanism that is provided at least on either side of the main shaft, amplifies the rotation of the main shaft, and rotates the rotary blade shaft of the rotary blade;
A transmission shaft provided at the left and right end portions of the main shaft, and for transmitting the rotation of the main shaft to the rotation amplification mechanism;
A connector for detachably connecting the transmission shaft and the main shaft;
A holding body that supports the wheel, the transmission shaft, and the rotary blade shaft and holds the rotation amplification mechanism;
A mowing machine in which the wheel, the transmission shaft, the rotary blade, the rotation amplification mechanism, and the holding body are detached integrally by removing the transmission shaft from the main shaft.

  Thereby, the structure of the variable speed mechanism can be simplified.

The second aspect of the present invention
The rotation direction of the main shaft is the same as the rotation direction of the wheel when the mower advances.
The rotation amplification mechanism amplifies the rotation of the main shaft so that the rotation direction of the rotary blade shaft is opposite to the rotation direction of the main shaft, and rotationally drives the rotary blade shaft. It is a mower.

  As a result, the configuration of the rotation amplification mechanism is simplified and the grass can be cut efficiently.

The third aspect of the present invention provides
The mower according to the first aspect of the present invention, further comprising a guard for tilting the posture of the grass provided along the rotary blade axis in front of the rotary blade.

  Thereby, it becomes possible to make it easy to cut the underside of the long grass.

The fourth invention relates to
The height of the lower end of the said guard and the height of the said rotary blade axis | shaft are substantially the same, It is a mower of 3rd this invention.

  Thereby, it becomes possible to make it easier to cut the underside of the long grass.

The fifth aspect of the present invention relates to
The holder is
A first cover case containing the rotation amplification mechanism and connected to one end of the transmission shaft and the rotary blade shaft;
A second cover case connected to the transmission shaft and the other end of the rotary blade and arranged in parallel with the first cover case, and a left fixed to one of the first cover case and the second cover case Frame,
A right frame fixed to the other of the first cover case and the second cover case;
A lateral frame connecting rear ends of the left frame and the right frame;
A vertical frame standing from the center of the horizontal frame and having an upper end coupled to the main body;
The wheel is the mower according to the first aspect of the present invention, which is rotatably attached to the left frame and the right frame.

  As a result, the mower can be moved stably.

The sixth invention relates to
The wheel has a front wheel and a rear wheel,
The front wheel and the rear wheel are the mowers according to the fifth aspect of the present invention, which are provided inside the left frame and the right frame.

  Thereby, since the grass outside the rotary blade is not overturned by the wheel, it is possible to easily cut the grass when the grass is subsequently cut.

The seventh invention relates to
The drive unit is
A motor disposed above the main shaft;
In order to transmit the rotation of the motor to the main shaft, it has a drive shaft arranged in the vertical direction,
The wheel has a front wheel and a rear wheel,
When viewed from the side, the front wheel is the mower according to the first aspect of the present invention, which is disposed substantially extending on the drive shaft.

  Thereby, a balance can be improved and it becomes easy for a user to operate.

The eighth invention relates to
A mowing attachment tool that is detachably attached to the cultivator to perform mowing by a cultivator having a main shaft for cultivating claws and a drive unit that rotates the main shaft at a rotational speed for cultivating,
Wheels,
A rotary blade for mowing that is disposed in front of the main shaft, is configured to have substantially the same width as the main shaft, and is driven to rotate about a horizontal axis;
A rotation amplifying mechanism that is provided on at least one of the left and right sides of the main shaft, amplifies the rotation of the main shaft, and rotates the rotary blade shaft of the rotary blade; A transmission shaft for transmitting the rotation of the main shaft to the rotation amplification mechanism;
A connector for detachably connecting the transmission shaft and the main shaft;
A mowing mounting tool including a holding body that supports the wheel, the transmission shaft, and the rotary blade shaft and holds the rotation amplification mechanism.

  Thereby, a cultivator can be used as a mower by simple operation.

  According to the present invention, it is possible to provide a mower and a mowing tool with a simple configuration.

Side view of the mower in the first embodiment according to the present invention. Side surface block diagram which shows the state which isolate | separated the main body and mowing part of the mower in Embodiment 1 concerning this invention Plane | planar block diagram of the main axis | shaft, transmission lower part, and mowing part in Embodiment 1 concerning this invention Front configuration diagram showing the vicinity of the rotary blade according to the first embodiment of the present invention (A) (b) The perspective block diagram for demonstrating the connection of the main axis | shaft and transmission shaft in Embodiment 1 concerning this invention. Configuration diagram of a rotation amplification mechanism according to the first embodiment of the present invention Side surface block diagram for demonstrating the state which uses the mower in Embodiment 1 concerning this invention as a cultivator. Front view of the vicinity of a tilling nail for explaining a state in which the mower according to the first embodiment of the present invention is used as a tiller. Plane | planar block diagram of the main axis | shaft of a mower, the transmission lower part, and the mowing part in which the rear wheel was arrange | positioned inside the flame | frame in the modification of Embodiment 1 concerning this invention Side surface block diagram of the mower in which the sled member was provided in the downward side surface of the rotary blade in the modification of Embodiment 1 concerning this invention. Plane | planar block diagram of the main axis | shaft of a mowing machine which has one rear wheel, a transmission lower part, and a mowing part in the modification of Embodiment 1 concerning this invention. (A) Side view of a mower whose rear wheel is configured to be height-adjustable in the modification of the first embodiment according to the present invention, (b) A model for explaining a height adjustment mechanism of the rear wheel Figure Plane | planar block diagram of the main axis | shaft of a mower, the transmission lower part, and a mowing part by which the rear wheel is comprised so that height adjustment is possible in the modification of Embodiment 1 concerning this invention. Side view of a conventional management machine

  Below, the mower in the embodiment concerning the present invention is explained.

(Embodiment 1)
Below, the mower in Embodiment 1 concerning this invention is demonstrated. The mower according to the present embodiment has a configuration in which the tilling claws of the walking type tiller are removed and a rotary blade for mowing is attached.

  FIG. 1 is a side configuration diagram of the mower 10 according to the first embodiment. As shown in the figure, the mower 10 has a main body 11 and a mowing unit 12 provided detachably on the lower side of the main body 11. FIG. 2 is a side configuration diagram illustrating a state in which the mowing unit 12 is removed from the main body 11. The operation of removing the mowing unit 12 will be described later in detail. As shown in FIGS. 1 and 2, the main body 11 has a main body upper portion 111 and a main body lower portion 112 on the basis of the forward direction of the mower 10 (the direction of arrow A), and a bumper on the front side of the main body upper portion 111. 113 is provided. In addition, a detachable battery 114 is provided on the main body upper portion 111, and a motor 115 is built in front of the battery 114, and the motor 115 is covered with a motor cover 118.

  Further, in order to transmit the rotational force of the motor 115 from the main body upper portion 111 to the main body lower portion 112, a transmission portion 116 is provided downward, and a transmission lower portion 116 a that is a lower portion of the transmission portion 116. Is provided with a main shaft 13 therethrough. The transmission portion 116 is a case in which a drive shaft 117 that transmits the power of the motor 115 to the main shaft 13 is provided. The drive shaft 117 rotates about the vertical axis, and the rotational force is transmitted to the main shaft 13 while changing the rotation direction using a bevel gear or the like, and the main shaft 13 is rotated about the horizontal axis.

  FIG. 3 is a plan configuration diagram of the transmission lower portion 116 a, the main shaft 13, and the mowing unit 12. In FIG. 3, a ceiling portion 191 of the rotary blade cover 19 to be described later is omitted for explanation. As shown in FIG. 3, the main shaft 13 is configured to extend on both the left and right sides of the transmission lower portion 116a. In this way, the main shaft 13 is provided so that the axial direction of the main shaft 13 is perpendicular to the front-rear direction and horizontal to the ground. It is transmitted to the main shaft 13 by the drive shaft 117, and the main shaft 13 rotates. The rotation of the main shaft 13 is counterclockwise (see arrow B) in FIGS. 1 and 2, and is the same direction as the rotation direction of the wheels when the mower 10 is advanced.

  As shown in FIG. 2, the main support portion 14 is fixed to the transmission portion 116 by two bolts 119, and the main support portion 14 is disposed on the rear side of the transmission portion 116. The main support portion 14 is provided with a transport wheel support portion 15. The transportation wheel support portion 15 is provided with transportation wheels 151. By turning the transporting wheel support 15 downward about the connecting portion with the main support 14, the transporting wheel 91 comes into contact with the ground (see the dotted arrow in FIG. 7 described later), but mowing is performed. In some cases, it is retracted upward.

  Further, a handle portion 16 is provided which is fixed to the main support portion 14 on the front side of the connection portion with the transport wheel support portion 15 and formed upward from the rear side of the main body upper portion 111. The handle portion 16 is provided with two grips 161. Of these two grips 161, the right grip 161 when the user grips is provided with a lever 162 that is a switch for rotating the main shaft 13. A main switch 163 for turning on the main power is provided in the middle of the handle portion 16. Since the right grip 161 overlaps the left grip 161, only the lever 162 is illustrated.

  Next, the mowing unit 12 that is an example of the mowing tool of the present invention will be described.

  The mowing unit 12 of the present embodiment is provided with cover cases 17 a and 17 b on both sides of the main shaft 13. A rotary blade 18 for mowing is provided between the two cover cases 17a and 17b and parallel to the main shaft 13 on the front side of the main shaft 13. A rotation amplification mechanism 30 that amplifies the rotation of the main shaft 13 and transmits the rotation to the rotary blade 18 is provided inside the one cover case 17a.

  FIG. 4 is a front configuration diagram of the rotary blade 18 portion. As shown in FIG. 4, the rotary blade 18 has a rotary blade shaft 181 disposed horizontally in the left-right direction, a cylindrical member 182 provided along the axial direction of the rotary blade shaft 181, and a cylindrical member 182. A plurality of mowing claw portions 183 are provided on the side surface. In the present embodiment, a row in which four mowing claw portions 183 are provided in parallel with the rotary blade shaft 181 and a row in which three mowing claw portions 183 are provided are alternately arranged around the cylindrical member 182. . The mowing claw portion 183 includes a mowing claw 184 formed so as to open in the left-right direction, and a fixing portion 185 that fixes the mowing claw 184 to the side surface of the cylindrical member 182.

  As shown in FIGS. 2 and 4, a rotary blade cover 19 is provided so as to cover the rotary blade 18. The rotary blade cover 19 includes a ceiling portion 191 that covers the upper side of the rotary blade 18, a side surface portion 192 that covers the upper side of the rotary blade 18, and a back surface portion 193 that covers the rear side of the rotary blade 18. A rubber elastic member 20 is provided below the back surface portion 193.

  An L-shaped member 21 is disposed at the front ends of the left and right side surface portions 192, and a guard 22 for tilting the grass posture is fixed by the L-shaped member 21. The guard 22 is a U-shaped member when viewed from the front, and has a central portion 221 that is horizontally disposed and end portions 222 that are formed upward from both ends thereof. These are fixed by respective L-shaped members 21. As shown in FIG. 4, the lower end of the guard 22 (the lower side of the central portion 221) is disposed so as to be substantially the same height as the rotary blade shaft 181.

  As shown in FIG. 3, a rod-like left frame 23 is fixed to the cover case 17a, and a rod-like right frame 24 is fixed to the cover case 17b. A horizontal frame 25 connecting the rear ends of the left frame 23 and the right frame 24 is provided, and a vertical frame 26 is provided standing from the center of the horizontal frame 25. As shown in FIG. 1, the vertical frame 26 is connected and fixed at the upper end portion 261 by a bolt 262 and the rear end of the transportation wheel support portion 15 described above.

  As shown in FIG. 3, a front wheel 27a is rotatably attached to the inside of the front portion of the left frame 23, and a front wheel 27b is rotatably attached to the inside of the front portion of the right frame 24. Yes. Here, as shown in FIG. 1, a support member 271a for supporting the front wheel 27a is provided perpendicular to the left frame 23, and the front wheel 27a is attached to the lower end of the support member 271a via a shaft 272a. Yes. Similarly, the front wheel 27b is also provided rotatably at the lower end of a support member 271b (see FIG. 3) attached perpendicularly to the right frame 24 via a shaft. These front wheels 27a and 27b are disposed substantially on the extension of the drive shaft 117 in a side view as shown in FIG. Further, outside the rear portion of the left frame 23, a rear wheel 28a is rotatably attached to the lower end of a support member 281a attached perpendicularly to the left frame 23 (see FIG. 1). Outside the portion, a rear wheel 28b is rotatably attached to the lower side of a support member 281b that is vertically attached to the right frame 24 (see FIG. 3).

  As shown in FIG. 3, transmission shafts 29 for transmitting the rotation of the main shaft 13 to the rotation transmission mechanism 30 are provided at both ends of the main shaft 13. FIGS. 5A and 5B are diagrams for explaining a connection state between the transmission shaft 29 and the main shaft 13. As shown in FIG. 5A, the transmission shaft 29 includes a cylindrical shaft portion 291 and a connection portion 292 having a U-shaped cross section perpendicular to the longitudinal direction. Two through holes 293 and 294 are formed in the connection portion 292. The through holes 293 and 294 are formed so as to pass through two opposing U-shaped wall surfaces. On the other hand, through holes 131 and 132 are also formed in the end portion of the main shaft 13 at the same intervals as the through holes 293 and 294. Then, as shown in FIGS. 5A and 5B, the main shaft 13 is disposed so as to fit into the U-shaped portion of the connection portion 292, and the pin 31 is inserted through the through hole 293 and the through hole 131, The pin 32 is inserted through the hole 294 and the through hole 132. The main shaft 13 and the transmission shaft 29 are connected and fixed to each other by the pins 31 and 32. The shaft portions 291 of the transmission shafts 29 at both ends are respectively inserted and arranged inside bearings 33 provided on the side surfaces of the cover cases 17a and 17b (see FIG. 3).

  Next, the configuration of the rotation amplification mechanism 30 of the present embodiment will be described.

  FIG. 6 is a diagram illustrating a configuration of the rotation amplification mechanism 30 of the present embodiment. In FIG. 6, the cover case 17a is indicated by a one-dot chain line.

  As shown in FIG. 6, a transmission shaft gear 301 that is a part of the rotation amplification mechanism 30 is disposed on the shaft portion 291 on the cover case 17 a side. In addition, an intermediate shaft 302 is provided in front of the transmission shaft 29, and the intermediate shaft 302 is inserted into the bearing 39 and disposed in the cover case 17a (see FIG. 3). As shown in FIG. 6, an intermediate shaft gear 303 and an intermediate shaft pulley 304 are fixed to the intermediate shaft 302. The intermediate shaft gear 303 and the transmission shaft gear 301 are in contact with each other. On the front side of the intermediate shaft 302, the rotary blade shaft 181 described above is disposed via a bearing 34 (see FIG. 3). A rotary blade shaft pulley 305 is fixed to the rotary blade shaft 181. A resin belt 306 is hung between the intermediate shaft pulley 304 and the rotary blade shaft pulley 305.

  Here, since the main shaft 13 rotates in the arrow C direction, the transmission shaft gear 301 also rotates in the arrow C direction. The rotation of the transmission shaft gear 301 is transmitted to the intermediate shaft gear 303, and the intermediate shaft gear 303 rotates in the direction opposite to the arrow C (arrow D direction). As the intermediate shaft gear 303 rotates, the intermediate shaft pulley 304 also rotates in the direction of arrow D. This rotation is transmitted to the rotary blade shaft pulley 305 by the belt 306, and the rotary blade shaft 181 rotates. For this reason, the rotation direction of the rotary blade shaft 181 is the direction of the arrow D, and can be opposite to the rotation direction of the main shaft 13. In the present embodiment, the rotation speed of the rotary blade shaft 181 is set to about 2000 rpm, and the rotation speed of the main shaft 13 is set to about 100 rpm. The rotation speed of the main shaft of 100 rpm corresponds to an example of the rotation speed for tillage of the present invention.

  The cover case 17b is provided with a transmission shaft 29 on the cover case 17b side and bearings 33 and 34 of the rotary blade shaft 181 (see FIG. 3).

  An example of the wheel of the present invention corresponds to the front wheels 27a and 27b and the rear wheels 28a and 28b of the present embodiment, and an example of the main shaft of the present invention corresponds to the main shaft 13 of the present embodiment. An example of the drive unit of the present invention corresponds to the battery 114, the motor 115, and the drive shaft 117 of the present embodiment, and an example of the rotary blade of the present invention corresponds to the rotary blade 18 of the present embodiment. An example of the rotation amplification mechanism of the present invention corresponds to the rotation amplification mechanism 30 of the present embodiment. The transmission shaft gear 301, the intermediate shaft 302, the intermediate shaft gear 303, the intermediate shaft pulley 304, the rotary blade shaft pulley 305, and the belt This corresponds to 306. An example of the holding body of the present invention corresponds to the case covers 17a and 17b, the left frame 23, the right frame 24, the horizontal frame 25, the vertical frame 26, and the support members 271a, 271b, 281a, and 281b of the present embodiment. To do. Furthermore, an example of the connector of the present invention corresponds to the pins 31 and 32. An example of the first cover case of the present invention corresponds to the cover case 17a of the present embodiment, and an example of the second cover case of the present invention corresponds to the cover case 17b of the present embodiment.

  Next, operation | movement of the mower 10 of this Embodiment is demonstrated.

  When the main switch 163 shown in FIG. 1 is turned on and the lever 162 is gripped, the motor 115 is rotated by the power of the battery 114, and the main shaft 13 is rotated counterclockwise (see arrow B) in FIG.

  Here, as shown in FIG. 5 (b), the transmission shaft 29 is fixed by the main shaft 13 and the pins 31 and 32, and therefore rotates according to the rotation of the main shaft 13.

  The rotation of the transmission shaft 29 is transmitted to the rotary blade shaft 181 via the transmission shaft gear 301, the intermediate shaft gear 303, the intermediate shaft pulley 304, the belt 306, and the rotary blade shaft pulley 305. Since the rotation of the main shaft 13 is transmitted to the rotary blade 18 via the rotation amplification mechanism 30 as described above, the rotary blade 18 is in the rotational direction opposite to the main shaft 13 and faster than the rotational speed of the main shaft 13. Rotate.

In this way, when the rotary blade 18 is rotated in the opposite direction to the front wheels 27a and 27b and the rear wheels 28a and 28b, the grass mower 10 is moved forward so that the grass is cut and the cut grass is moved forward by the grass cutter. Next, a method of removing the mowing unit 12 from the mower 10 will be described.

  By pulling out the pins 31 and 32 described with reference to FIGS. 5A and 5B from the transmission shaft 29, the fixation between the main shaft 13 and the transmission shaft 29 disposed at both ends thereof is released. Further, by removing the bolt 262, as shown in FIGS. 1 and 2, the fixing of the vertical frame 26 and the transporting wheel support 15 is released. By releasing these fixations, the mowing unit 12 is removed from the mower 10 as shown in FIG.

  And by attaching the claws for the tiller to both sides of the transmission lower part 116a of the main shaft 13, the mower 10 of the first embodiment can be used as the tiller. FIG. 7 is a side configuration diagram showing a state where the tilling claws 40 are attached to both sides of the main shaft 13. FIG. 8 is an enlarged front view of the vicinity of the main shaft 13 and the tilling claw 40. As shown in FIG. 8, the tilling claw 40 has an inner claw 401 and an outer claw 402, and an outer ring 403 is provided outside the outer claw 402. The inner claws 401 and the outer claws 402 are fixed to the main shaft 13 by pins (not shown) or the like. In addition, in FIG. 7, although the wheel support part 15 for conveyance is lowered | hung, when plowing work is mentioned, it is mentioned above. Although omitted in FIG. 7, a resistance rod may be provided. This resistance bar needs to be configured to retract upward when mowing.

  In the present embodiment, the explanation was made as a configuration in which the tilling claws of the tillage machine were removed and the rotary blade for mowing was attached, but the wheel was removed from the management machine in which the wheel was attached to the main shaft, and the mowing unit 12 was The attached structure may be sufficient. Further, even when used as a management machine, a tillage claw may be attached to the main shaft 13 and used for tillage. That is, the mower according to the present embodiment can be implemented as a configuration in which a wheel or a tilling claw of the management machine is removed and a rotary blade for mowing is attached.

  As described above, in the mower 10 according to the present embodiment, it is necessary to change the rotational direction and speed of the main shaft itself as in the past by setting the rotational speed of the main shaft 13 and attaching the mowing unit 12. Therefore, the configuration of the rotation amplification mechanism 30 can be simplified.

  Moreover, since it is used also as a tiller, a management machine, etc., the rotation speed of the main shaft 13 is the rotation speed for tillage or the rotation speed for wheels. However, the rotation speed of the main shaft 13 is amplified and the rotary blade 18 is amplified. Therefore, the rotation speed of the rotary blade 18 becomes a speed commensurate with the mowing, and the mowing performance can be improved.

  In the present embodiment, the rotation direction of the rotary blade 18 is the opposite direction to the rotation direction of the wheels (front wheels 27a, 27b and rear wheels 28a, 28b) when moving forward, but may be the same direction. However, it is possible to mow the grass more efficiently in the opposite direction.

  In the present embodiment, the guard 22 is provided in front of the rotary blade 18, but the guard 22 may not be provided. However, by providing the guard 22, the upper part of the grass can be tilted forward so that the root can be exposed to the rotary blade 18, so that the lower side of the long grass can be easily cut.

  Furthermore, in the present embodiment, the guard 22 is arranged such that the lower end thereof is substantially the same height as the rotary blade shaft 181, but is not limited thereto, and is higher or lower than the rotary blade shaft 181. It may be a position. However, by setting the same position, it is possible to more efficiently cut grass.

  Furthermore, in this Embodiment, as shown in FIG. 3, the guard 22 is formed in the width | variety longer than the width | variety which can cut the grass of the rotary blade 18. As shown in FIG. By comprising in this way, while serving also as protection of the rotary blade 18, the upper part of the grass can be brought forward and the root can be exposed to the rotary blade 18.

  Further, in the present embodiment, the rear wheels 28a and 28b are disposed outside the left frame 23 and the right frame 24. By arranging the rear wheels 28a and 28b in this way, the stability of the mower 10 increases. As illustrated in FIG. 9, the rear wheels 28 a and 28 b may be disposed inside the left frame 23 and the right frame 24. In this way, by arranging the rear wheels 28a and 28b inside the frame, grass at a place other than the position where the rotary blade 18 passes is not stepped down by the wheel. It can be made easy to mow.

  In the present embodiment, the front wheels 27a and 27b are arranged on the extension of the drive shaft 117 in a side view as shown in FIG. 1, but the present invention is not limited to this. However, by arranging as in the present embodiment, the balance of the mower 10 is improved, so that the operation of bending or advancing the machine can be easily performed, and the operability can be improved.

  Further, in the present embodiment, as shown in FIG. 1, a predetermined interval is provided between the rotary blade 18 and the ground, but a sled member may be provided in order to keep this interval more reliably. . FIG. 10 is a diagram illustrating a cross-sectional configuration of the mower 10 provided with a sled member. As shown in FIG. 10, an L-shaped member 35 similar to the L-shaped member 21 is provided on the rear side of the side surface portion 192, and the rear end of the sled member 36 is fixed to the L-shaped member 35. Yes. The sled member 36 has left and right sled portions 361 and a central portion 332 positioned in front of the rotary blade 18, and the central portion 332 performs the same function as the central portion 221 shown in FIG. The sled member 36 can more reliably keep the distance between the rotary blade 18 and the ground constant compared to the configuration of FIG.

  Further, in the present embodiment, the front wheels 27a and 27b and the rear wheels 28a and 28b are rotated by being driven by the user pressing the mower 10, but are driven using the rotation of the main shaft 13. Also good. In this case, a gear may be provided at the end of the main shaft 13 on the case cover 17b side, and the gear provided on the shaft penetrating both the front wheels 27a and 27b may be engaged with the gear. At this time, the rotational speed of the wheel may be approximately the same as the rotational speed of the main shaft 13.

  Further, in the present embodiment, since the elastic member 20 is provided at the lower end of the back surface portion 193 of the rotary blade cover 19, the gap with the ground is narrowed, and the grass is crushed and made fine in the rotary blade cover 19. Can be discharged to the rear of the gap. Moreover, the damage by interference with the ground can be reduced by using rubber as the material of the elastic member 20.

  In the present embodiment, two rear wheels 28a and 28b are provided, but only one rear wheel may be provided. As shown in FIG. 11, support members 381 and 382 (similar to the support members 281a and 281b in FIG. 1) are provided downward from the left frame 23 and the right frame 24, and the support members 381 and 382 are provided. A shaft 383 is rotatably provided between the support members 381 and 382 at the lower end. The rear wheel 38 is fixed to the shaft 383. The rear wheel 38 is disposed at the center of the left frame 23 and the right frame 24.

  As shown in FIG. 3, when there are four wheels, if there are irregularities on the ground, any wheel will float and be in contact with the three wheels, the rotary blade 18 will be lifted, and the space between the rotary blade 18 and the ground will be widened. There is. However, by using three wheels, the two wheels (front wheels 27a and 27b) closer to the rotary blade 18 are always in contact with the ground, and the rear wheel 38 can follow the inclination.

  Further, the rear wheel height may be configured to be adjustable. FIG. 12A is a side configuration diagram showing a configuration capable of adjusting the height of the rear wheel. FIG. 12B is an enlarged schematic diagram of the rear wheel portion. FIG. 13 is a plan view of the mowing unit 12, the main shaft 13, and the transmission lower part 116a. In the configuration shown in FIGS. 12 and 13, one rear wheel 37 is provided. The rear wheel 37 is provided on a rotary shaft 371, and the rotary shaft 371 is provided at the lower end of a first support member 372 provided perpendicular to the ground. The first support member 372 is fixed by a second support member 373 and a bolt 374 that are horizontally provided so as to protrude forward from the vicinity of the center of the horizontal frame 25. A long hole 372a is formed in the first support member 372 in the vertical direction, and a rear wheel is formed by moving a fixed portion of the first support member 372 and the second support member 373 along the long hole 372a. The vertical position of 37 can be adjusted. The position of the rear wheel 37 is not limited to the front side of the horizontal frame 25 but may be the rear side.

  In this way, the height can be adjusted by adjusting the height. The two rear wheels 28a and 28b shown in the above embodiment may be configured to be height-adjustable, but in the case of one rear wheel, the structure to be adjusted can be simplified. In addition, the height of the sled member 36 can be adjusted by making the mounting hole between the L-shaped member 35 and the side surface portion 192 a long hole.

  Moreover, in this Embodiment, since it becomes possible to use as a tiller only by removing the mowing part 12 from the mower 10 and attaching a tilling nail, it can be used as a mower with a simple operation. I can do it.

  Further, by using a belt made of a resin material as the belt 306, when the rotary blade is clogged, slippage occurs between the belt 306 and the rotary blade shaft pulley 305, and the rotary blade 18 does not rotate excessively. So it is safer.

  Moreover, since the rotary blade 18 is arrange | positioned inside the cover cases 17a and 17b of both right and left sides, it can prevent that the cut grass scatters to right and left.

  In the present embodiment, in order to fix the mowing unit 12 to the main body 11, not only the fixing between the main shaft 13 and the transmission shaft 29 but the vertical frame 26 is provided, but the vertical frame 26 is provided. It is not necessary. However, it is more preferable that the vertical frame 26 is provided in terms of strength. Further, the fixing position of the vertical frame 26 on the main body 11 side is not limited to the main support portion 14 but may be the transport wheel support portion 15.

  In the above embodiment, the rotation is transmitted from the transmission shaft 29 to the intermediate shaft 302 by the gear, but it may be transmitted by a belt.

  If the rotation speed can be sufficiently amplified, the intermediate shaft 302, the intermediate shaft gear 303, and the intermediate shaft pulley 304 may not be provided.

  In the present embodiment, the belt 306 is formed of a resin material, but is not limited thereto. However, considering the case where grass is involved as described above, the belt 306 is preferably made of resin from the viewpoint of safety.

  In the present embodiment, the ceiling portion 191 of the rotary blade cover 19 is disposed obliquely so that the height from the ground increases as it goes forward. It becomes wider and grass becomes easier to enter.

  In the present embodiment, a walking type mower has been described. However, the present invention is not limited to the walking type.

  According to the mowing machine and the mowing tool of the present invention, an effect that the configuration is simple is exhibited, and it is useful as a management machine and a tiller that can be used for mowing.

DESCRIPTION OF SYMBOLS 10 Mower 11 Main body 12 Mowing part 13 Main shaft 14 Main support part 15 Carrying wheel support part 16 Handle part 17a, 17b Cover case 18 Rotary blade 19 Rotary blade cover 20 Elastic member 21 L-shaped member 22 Guard 23 Left frame 24 Right Frame 25 Horizontal frame 26 Vertical frame 27a, 27b Front wheel 28a, 28b Rear wheel 29 Transmission shaft 30 Rotation amplification mechanism 31, 32 Screw 33, 34 Bearing 35 L-shaped member 36 Sled member 37 Rear wheel 38 Rear wheel

Claims (8)

The body,
Wheels,
A main shaft connected to the main body for a tilling claw of a tiller;
A drive unit provided in the main body for rotating the spindle at a rotational speed for tillage;
A rotary blade for mowing that is disposed in front of the main shaft, is configured to have substantially the same width as the main shaft, and is driven to rotate about a horizontal axis;
A rotation amplifying mechanism that is provided at least on either side of the main shaft, amplifies the rotation of the main shaft, and rotates the rotary blade shaft of the rotary blade;
A transmission shaft provided at the left and right end portions of the main shaft, and for transmitting the rotation of the main shaft to the rotation amplification mechanism;
A connector for detachably connecting the transmission shaft and the main shaft;
A holding body that supports the wheel, the transmission shaft, and the rotary blade shaft and holds the rotation amplification mechanism;
A mowing machine in which the wheel, the transmission shaft, the rotary blade, the rotation amplification mechanism, and the holding body are detached integrally by removing the transmission shaft from the main shaft. The rotation direction of the main shaft is the same as the rotation direction of the wheel when the mower advances.
2. The mowing according to claim 1, wherein the rotation amplification mechanism amplifies the rotation of the main shaft and rotationally drives the rotary blade shaft so that the rotation direction of the rotary blade shaft is opposite to the rotation direction of the main shaft. Machine.   The mower according to claim 1, further comprising a guard that is provided along the rotary blade axis and tilts the posture of the grass in front of the rotary blade.   The mower according to claim 3, wherein a height of a lower end of the guard and a height of the rotary blade shaft substantially coincide with each other. The holder is
A first cover case containing the rotation amplification mechanism and connected to one end of the transmission shaft and the rotary blade shaft;
A second cover case connected to the transmission shaft and the other end of the rotary blade and arranged in parallel with the first cover case, and a left fixed to one of the first cover case and the second cover case Frame,
A right frame fixed to the other of the first cover case and the second cover case;
A lateral frame connecting rear ends of the left frame and the right frame;
A vertical frame standing from the center of the horizontal frame and having an upper end coupled to the main body;
The mower according to claim 1, wherein the wheel is rotatably attached to the left frame and the right frame. The wheel has a front wheel and a rear wheel,
The mower according to claim 5, wherein the front wheel and the rear wheel are provided inside the left frame and the right frame. The drive unit is
A motor disposed above the main shaft;
In order to transmit the rotation of the motor to the main shaft, it has a drive shaft arranged in the vertical direction,
The wheel has a front wheel and a rear wheel,
The mower according to claim 1, wherein when viewed from a side, the front wheel is disposed substantially on the extension of the drive shaft. A mowing attachment tool that is detachably attached to the cultivator to perform mowing by a cultivator having a main shaft for cultivating claws and a drive unit that rotates the main shaft at a rotational speed for cultivating,
Wheels,
A rotary blade for mowing that is disposed in front of the main shaft, is configured to have substantially the same width as the main shaft, and is driven to rotate about a horizontal axis;
A rotation amplifying mechanism that is provided on at least one of the left and right sides of the main shaft, amplifies the rotation of the main shaft, and rotates the rotary blade shaft of the rotary blade; A transmission shaft for transmitting the rotation of the main shaft to the rotation amplification mechanism;
A connector for detachably connecting the transmission shaft and the main shaft;
A mowing mounting tool comprising a holding body that supports the wheel, the transmission shaft, and the rotary blade shaft and holds the rotation amplification mechanism.

Images