JP2013223445A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower capable of simultaneously and efficiently carrying out work of mowing the upper face and slope face of a levee.SOLUTION: A mower includes: an engine 8 mounted on a machine body 4; first and second mowing devices 20, 50 of the flail type arranged right and left below the machine body 2; and a power relay mechanism 80 branching power from the engine 8 toward the first mowing device 20, to transmit the power to the second mowing device 50. The second mowing device 50 is connected to the first mowing device 20 so as to be vertically swingable around a turning shaft 6a extending in the advancing direction of the machine body 2. The power relay mechanism 80 is configured to be adjustable in length according to the vertical swinging attitude of the second mowing device 50 with respect to the first mowing device 20.

Description

  The present invention relates to a mower that performs mowing work.

  Conventionally, the engine includes an engine mounted on the airframe and rotary main and auxiliary mowing devices arranged side by side on the lower side of the airframe, and the auxiliary mowing device is rotated with respect to the main mowing device. 2. Description of the Related Art A mower is known that is connected so as to be swingable up and down around a moving axis (see, for example, Patent Document 1). In this type of mower, the main rotary cutting blade that rotates about the vertical axis that is pivotally supported by the main mowing device, and the auxiliary rotary cutting blade that rotates about the vertical axis that is pivotally supported by the auxiliary mowing device, It is possible to mow the grass growing on the upper surface and the slope at the same time, and there is an advantage that it is possible to save the trouble of performing the mowing work by reciprocating the reed many times.

JP-A-6-276825

  However, in the mower of Patent Document 1, since both the main and sub rotary cutting blades are of a type that rotates horizontally around the vertical axis, when the grass grown on the reed is long, the cut grass is covered with the device cover. There was a tendency to stay in the room and make it impossible to discharge and continue work. Also, there was a tendency to be unsuitable for high-speed cutting.

  An object of the present invention is to provide a mowing machine that can cut well even long grass grown on the upper surface and slope of a reed without smashing it with a flail cutting blade and retaining it in an apparatus cover.

  In order to solve the above-mentioned problems, the invention of claim 1 is directed to a drive source mounted on a fuselage, flail-type first and second mowing devices arranged side by side below the fuselage, and the drive source. A power relay mechanism for branching the power from the first to the first mowing device and transmitting the power to the second mowing device, and the two mowing devices move in the direction of travel of the airframe relative to the first mowing device. The power relay mechanism is configured to be adjustable in length according to a vertically swinging posture of the second mowing device with respect to the first mowing device. That is.

  According to a second aspect of the present invention, in the mower according to the first aspect, each of the mowing devices is provided on a horizontal axis that rotates with power transmitted to each of the mowing devices, and on an outer peripheral side of the horizontal shaft. A plurality of flail cutting blades and a device cover that covers the upper side of the flail cutting blade group, and the rotating shaft is positioned on the lower side of the left and right side plate portions adjacent to each other in the device covers. is there.

  According to a third aspect of the present invention, in the mower according to the second aspect, the power relay mechanism is a pair of left and right connected to be able to transmit power and bend and rotate via a transmission shaft extending in the traveling direction of the body. The power transmission case is provided.

  According to a fourth aspect of the present invention, in the mower according to the second aspect, a power input shaft that is rotatably disposed on the first mowing device side in a posture extending in a direction intersecting the horizontal axis, and also the horizontal axis. And a power output shaft rotatably disposed on the second mowing device side in a posture extending in a direction that intersects with the second mowing device, and the front machine power relay mechanism is connected to the power input shaft. And an output-side universal joint connected to the front machine power output shaft, and an expansion / contraction rod configured to be interlocked and connected to each other and extendable in the axial direction.

  In the present invention, even when the second mowing device swings up and down around the rotation axis with respect to the first mowing device and the posture of the second mowing device changes with respect to the first mowing device, The length of the power relay mechanism is adjusted according to the vertical swinging posture of the second mowing device with respect to the first mowing device, and drives both the first and second mowing devices. Even in a place having a slope (inclined surface), both the upper surface and the slope can be mowing at the same time, and the efficiency of mowing work can be improved. In addition, since the first and second mowing devices are frer type, the mowing operation is performed by hitting the cutting blade against the grass from above, so that the grass can be trimmed to the ground. . Even if the grass grown on the reed is long, the cut grass is less likely to stay in the device cover than in the rotary type, and continuous work can be performed smoothly. In addition, it is more suitable for high-speed cutting than the rotary type, and is highly effective in terms of improving mowing workability. Further, by hitting the cutting blade from above, it is possible to pulverize while cutting even if the underground part of grass such as roots and rhizomes is dug up.

  In particular, according to the invention of claim 2, each of the mowing devices includes a horizontal shaft that is rotated by power transmitted to each of the mowing devices, a plurality of flail cutting blades provided on an outer peripheral side of the horizontal shaft, An apparatus cover that covers the upper side of the flail cutting blade group, and the rotary shaft is positioned on the lower side of the left and right side plate portions adjacent to each other in the both apparatus covers. Although the vertical height of the device is higher than that of the conventional rotary type mowing device, it rotates to the upper side of the conventional device cover in relation to the angle between the upper surface of the ridge and the slope. The second mowing device can be swung downward greatly, compared to the case where it has a fulcrum, and it is easy to cope with the case where the angle between the upper surface of the heel and the slope is steep (for the angle between the upper surface of the heel and the slope). Wide application range). Therefore, the mowing operation can be performed satisfactorily, and it is possible to effectively prevent occurrence of uncutting.

It is a side view which shows an example of the whole structure of the mower in 1st and 2nd embodiment. It is plane sectional drawing which shows an example of the whole structure of the mower in 1st and 2nd embodiment. It is a skeleton figure of the power transmission system in a 1st embodiment. It is a rear view for demonstrating the mowing work by the mower of 1st Embodiment. It is a rear view for demonstrating the mowing work by the mower of 1st Embodiment. It is a skeleton figure of the power transmission system in a 2nd embodiment. It is a rear view for demonstrating the mowing work by the mower of 2nd Embodiment. It is a rear view for demonstrating the mowing work by the mower of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<1. First Embodiment>
<1.1. Overall configuration of mower>
The mower 100 is an apparatus capable of performing mowing work by simultaneously driving two units (the first mowing apparatus 20 and the second mowing apparatus 50). As shown in FIGS. 1 to 3, the mower 100 mainly includes a traveling wheel 1, a transmission case 2, an engine 8, a first mowing device 20, a second mowing device 50, and a power relay mechanism 80. It is equipped with.

  The mower 100 includes a machine body 4 supported by a pair of left and right traveling wheels 1. The left and right traveling wheels 1 are fixed to an axle 3 that protrudes left and right outward from a mission case 2 mounted on the fuselage 4. The steering handle 5 is disposed obliquely above and behind the mission case 2. The proximal end of the steering handle 5 is connected to the mission case 2. The first and second mowing apparatuses 20, 50 are of the Freil type arranged side by side on the lower side of the body 4 (more specifically, the front lower part side).

  The engine 8 (drive source) is fixed to the upper surface side of the mission case 2. Power from the engine 8 is transmitted to the axle 3 via the mission case 2. As shown in FIG. 3, the power from the engine 8 is transmitted to the first and second mowing apparatuses 20 and 50 via a belt and pulley transmission system 9 and a belt tension type main clutch 10.

  The first mowing apparatus 20 is a fler type (hammer knife type). As shown in FIGS. 1 and 2, the first mowing apparatus 20 is supported in front of the fuselage via a mission case 2 and an input transmission case 21, and mainly includes a first horizontal shaft 23 and a plurality of first flailes. The cutting blade 24 and the input branch relay unit 40 are included.

  The input branch relay unit 40 disposed on the rear side of the first mowing device 20 is connected to the first horizontal shaft 23 via a chain and a sprocket transmission system 22 built in the input transmission case 21 so as to transmit power. Yes. As shown in FIG. 2, the first horizontal axis 23 extends in the horizontal direction. The plurality of first flail cutting blades 24 are provided on the outer periphery of the first horizontal shaft 23. As shown in FIG. 2, the tip of each first flail cutting blade 24 is bifurcated and pivotally supported with respect to the first horizontal shaft 23.

  The first flail cutting blade 24 group is covered from above by a device cover 25 having an upper plate portion and left and right side plate portions 26. A first horizontal shaft 23 is rotatably supported on the left and right side plate portions 26 of the device cover 25. A front cover 27 is provided on the front side of the device cover 25. The front cover 27 has a front portal shape. Further, as shown in FIG. 2, the left and right side surfaces of the front cover 27 are fixed to the mid-longitudinal portion of the support leg portion 31 whose base end side is connected to the left and right side plate portions 26 of the device cover 25.

  A rubber plate cover 28 is attached to the front end side of the front cover 27. As shown in FIGS. 1 and 2, the size of the rubber plate cover 28 in the left-right direction is substantially the same as the size of the front cover 27 in the left-right direction. The presence of the front cover 27 and the rubber plate cover 28 prevents stones and the like from scattering forward during mowing work.

  The pair of left and right support legs 31 support the corresponding gauge wheel 32 and front cover 27. As shown in FIGS. 1 and 2, the base end side of each support leg portion 31 is connected to the left and right side plate portions 26 of the device cover 25. The left and right gauge rings 32 are pivotally supported at the distal ends of the corresponding support legs 31 and protrude forward of the first mowing device 20. A rear cover 35 is provided on the rear end side of the device cover 25 via a hinge (not shown) or the like so as to be rotatable up and down. A rubber plate 36 having a short vertical dimension is fixed to the lower end side of the rear cover 35.

  Now, the input branch relay unit 40 disposed on the rear side of the first mowing device 20 transmits the power supplied from the engine 8 to the first horizontal shaft 23 of the first mowing device 20, the power relay mechanism 80, and the second power transmission mechanism 80. It branches off to the second horizontal shaft 53 of the mowing device 50. As shown in FIG. 3, the branch input shaft 41 of the input branch relay unit 40 is linked and connected to the first horizontal shaft 23 via the chain and sprocket transmission system 22. Further, the branch input shaft 41 is connected via a bevel gear mechanism so as to be able to transmit power to a power input shaft 42 that is rotatably disposed on the first mowing device 20 side in a posture extending in a direction intersecting the first horizontal shaft 23. Has been.

  Thereby, a part of the power from the engine 8 is transmitted to the power relay mechanism 80 and the remaining part is transmitted to the first horizontal shaft 23. As a result, the second horizontal shaft 53 is rotated by a part of the power branched by the input branch relay unit 40, and the first horizontal shaft 23 is rotated by the remaining power.

  Similar to the first mowing device 20, the second mowing device 50 is of the frail type (hammer knife type). As shown in FIGS. 2 and 3, the second mowing apparatus 50 moves up and down around the rotation axis 6 a of the hinge 6 with respect to the first mowing apparatus 20 via a hinge 6 that connects the first mowing apparatus 20 to the second mowing apparatus 20. It is connected so that it can swing. As shown in FIGS. 1 and 2, the second mowing apparatus 50 mainly includes a second horizontal shaft 53, a plurality of second flail cutting blades 54, and an output relay unit 70.

  The output relay unit 70 disposed on the rear side of the second mowing device 50 is connected to the second horizontal shaft 53 via a chain and a sprocket transmission system 52 built in the output transmission case 51 so as to be able to transmit power. . As shown in FIG. 2, the second horizontal axis 53 also extends in the horizontal direction. The plurality of second flail cutting blades 54 are provided on the outer periphery of the second horizontal shaft 53. As shown in FIG. 2, the tip of each second flail cutting blade 54 is bifurcated and pivotally supported with respect to the second horizontal shaft 53.

  The second flail cutting blade 54 group is covered from above by a device cover 55 having an upper plate portion and left and right side plate portions 56. A second horizontal shaft 53 is rotatably supported on the left and right side plate portions 56 of the device cover 55. A front cover 57 is provided on the front side of the device cover 55. The front cover 57 has a front portal shape. Further, as shown in FIG. 2, the left and right side surfaces of the front cover 57 are fixed to the mid-longitudinal portion of the support leg portion 61 whose base end side is connected to the left and right side plate portions 56 of the device cover 55.

  A rubber plate cover 58 is attached to the front end side of the front cover 57. As shown in FIGS. 1 and 2, the size of the rubber plate cover 58 in the left-right direction is substantially the same as the size of the front cover 57 in the left-right direction. The presence of the front cover 57 and the rubber plate cover 58 prevents stones and the like from scattering forward during mowing work.

  On one side surface of the front cover 57 opposite to the first mowing device 20 (left side plate portion 56 in the embodiment), a support leg portion 61 with an auxiliary front wheel 62 pivotally supported at the tip protrudes forward of the second mowing device 50. To be fixed. Further, on one side surface (the left side plate portion 56 in the embodiment), a support leg portion 63 that pivotally supports an auxiliary rear wheel 64 at the tip is fixed so as to protrude rearward of the second mowing device 50. A rear cover 65 is provided on the rear end side of the device cover 55 via a hinge (not shown) and the like so as to be vertically rotatable. A rubber plate 66 having a short vertical dimension is fixed to the lower end side of the rear cover 65.

  The output relay unit 70 relays power from the input branch relay unit 40 via the power relay mechanism 80 and transmits it to the second horizontal axis 53 side. As shown in FIG. 3, the power output shaft 72 rotatably disposed on the second mowing device 50 side in a posture extending in a direction intersecting the second horizontal shaft 53 is branched by the output relay unit 70 via the bevel gear mechanism. The output shaft 73 is linked and connected. The branch output shaft 73 is linked to the second horizontal shaft 53 via a chain and sprocket transmission system 52.

  As shown in FIGS. 3 and 4, the power relay mechanism 80 transmits a part of the driving force supplied from the engine 8 and directed to the first mowing device 20 to the second mowing device 50. As shown in FIGS. 2 and 3, the power relay mechanism 80 is mainly composed of a pair of left and right power transmission cases connected to be able to transmit power and bend and rotate via a transmission shaft 85 extending in the traveling direction of the machine body 4. 81,86.

  The first power transmission case 81 branches a part of the power toward the first mowing device 20 and transmits it to the second power transmission case 86 side. As shown in FIG. 3, the first power transmission case 81 mainly accommodates a first upstream sprocket 82, a first downstream sprocket 83, and a first chain 84 inside.

  As shown in FIG. 3, the power transmission upstream side of the first power transmission case 81 has a power input shaft 42 that is rotatably disposed on the first mowing apparatus 20 side in a posture extending in a direction intersecting the first horizontal shaft 23. Is pivotally supported by the shaft. On the downstream side of power transmission of the first power transmission case 81, a transmission shaft 85 extending in the traveling direction of the machine body 4 is pivotally supported. In the first power transmission case 81, the first upstream sprocket 82 is fixed to the power input shaft 42, and the first downstream sprocket 83 is fixed to the transmission shaft 85. A first chain 84 is wound around the first upstream sprocket 82 and the first downstream sprocket 83.

  The second power transmission case 86 transmits power supplied via the first power transmission case 81 and the transmission shaft 85 toward the output relay unit 70 and the second horizontal shaft 53. As shown in FIG. 3, the second power transmission case 86 mainly accommodates a second upstream sprocket 87, a second downstream sprocket 88, and a second chain 89 inside.

  As shown in FIG. 3, on the upstream side of power transmission of the second power transmission case 86, a transmission shaft 85 extending in the traveling direction of the machine body 4 is pivotally supported. That is, the power transmission upstream side of the first power transmission case 81 and the power transmission downstream side of the second power transmission case 86 are pivotally supported by the common transmission shaft 85 so as to be able to rotate with each other. On the downstream side of the power transmission of the second power transmission case 86, a shaft that is rotatable about a power output shaft 72 that is rotatably disposed on the second mowing device 50 side in a posture extending in a direction intersecting with the second horizontal shaft 53. It is supported. In the second power transmission case 86, the second upstream sprocket 87 is fixed to the transmission shaft 85 and the second downstream sprocket 88 is fixed to the power output shaft 72. A second chain 89 is wound around the second upstream sprocket 87 and the second downstream sprocket 88.

  As described above, when the second mowing device 50 swings up and down around the rotation shaft 6 a of the hinge 6 with respect to the first mowing device 20, the first power transmission case 81 is connected to the power input shaft 42 and the transmission shaft 85. The second power transmission case 86 rotates about each of the transmission shaft 85 and the power output shaft 72 while rotating about the respective fulcrums.

  Therefore, as the second mowing device 50 swings up and down with respect to the first mowing device 20 and the distance between the power input shaft 42 and the power output shaft 72 increases or decreases, the first power transmission case 81 and The second power transmission case 86 is bent and rotated around the transmission shaft 85. For this reason, even if the second mowing device 50 swings up and down with respect to the first mowing device 20, the power relay mechanism 80 depends on the vertical swinging posture of the second mowing device 50 with respect to the first mowing device 20. Will be adjusted by bending and turning, and part of the driving force toward the first mowing device 20 can be branched and transmitted to the second horizontal shaft 53 of the second mowing device 50. .

<1.2. Mowing work>
FIG. 4 is a rear view showing the positional relationship between the first mowing device 20 and the second mowing device 50 when the first mowing device 20 and the second mowing device 50 perform a plane mowing operation. FIG. 5 shows the first mowing device 20 and the second mowing when the first mowing device 20 performs the mowing work on the shore plane and the second mowing device 50 performs the mowing work on the slope. 4 is a rear view showing the positional relationship of the device 50. FIG.

  For example, when the mowing work on the upper surface and the slope of the ridge is simultaneously performed, the second mowing device 50 swings downward with respect to the first mowing device 20, and the second mowing device 50 with respect to the first mowing device 20. The posture changes. The distance between the power input shaft 42 and the power output shaft 72 increases in accordance with this change in posture.

  As a result, the power relay mechanism 80 bends in such a manner that the power relay mechanism 80 extends in line with each other around the transmission shaft 85 in accordance with changes in the posture of the first mowing device 20 and the second mowing device 50. Then, the length between both ends of the power relay mechanism 80 is adjusted. For this reason, even when the second mowing device 50 swings up and down with respect to the first mowing device 20, power can be stably transmitted to the second mowing device 50.

  Here, as shown in FIGS. 4 and 5, the rotation shaft 6 is provided on the lower end side of the first mowing device 20 and the second mowing device 50. More specifically, the hinge 6 (rotating shaft 6a) is positioned on the lower side of the left and right side plate portions 26 and 56 adjacent to each other in the device covers 25 and 55. In the embodiment, because of the flare-type mowing apparatuses 20 and 50, the vertical height of the apparatus is higher than that of the conventional rotary-type mowing apparatus, but in the relationship between the angle between the upper surface of the ridge and the slope. The second mowing device 50 can be swung downward and the angle between the upper surface of the ridge and the slope is steep as compared with the case where the upper fulcrum is provided on the upper side of the device cover as in the prior art. (The range of application to the angle between the upper surface of the ridge and the slope is wide). Therefore, the mowing operation can be performed satisfactorily, and it is possible to effectively prevent occurrence of uncutting.

<1.3. Advantages of Mower of First Embodiment>
As described above, in the mower 100 of the first embodiment, the second mowing device 50 rotates about the rotation shaft 6 with respect to the first mowing device 20, and the second mowing device with respect to the first mowing device 20. Even when the posture of 50 changes, power can be accurately transmitted to each of the first horizontal shaft 23 and the second horizontal shaft 53, and the first mowing device 20 and the second mowing device 50 can simultaneously perform the mowing work. .

  Thereby, in the place which has the upper surface and slope (slope) like a ridge, the grass cutting work can be simultaneously performed with respect to each of this upper surface and slope. Therefore, the efficiency of mowing work can be improved.

  In addition, since the first and second mowing apparatuses 20 and 50 are of the Frere type, the mowing operation is performed by hitting the cutting blades 24 and 54 against the grass from above, so that the grass is grounded. Can be cut short. Even if the grass growing on the reed is long, the cut grass is less likely to stay in the device covers 25 and 55 than in the rotary type, and continuous work can be performed smoothly. In addition, it is more suitable for high-speed cutting than the rotary type, and is highly effective in terms of improving mowing workability. Further, by hitting the cutting blade from above, it is possible to pulverize while cutting even if the underground part of grass such as roots and rhizomes is dug up.

<2. Second Embodiment>
Next, a second embodiment of the present invention will be described. The mowers 100 and 200 of the first and second embodiments have the same configuration except that the configurations of the corresponding first mowing device, second mowing device, and power relay mechanism are different. Therefore, in the following, this difference will be mainly described.

  In addition, the same code | symbol is attached | subjected to the same component in the mowers 100 and 200, and the component to which this same code | symbol was attached | subjected has been demonstrated by 1st Embodiment. Therefore, description is abbreviate | omitted in 2nd Embodiment.

<2.1. Configuration of mower>
FIG. 6 is a skeleton diagram of the power transmission system in the second embodiment. As shown in FIGS. 1 and 6, the mower 200 mainly includes a traveling wheel 1, a transmission case 2, an engine 8, a first mowing device 120, a second mowing device 150, and a power relay mechanism 180. It has. The first mowing device 120 is of the frail type (hammer knife type), similarly to the first mowing device 20 of the first embodiment. As shown in FIG. 6, the first mowing apparatus 120 mainly includes a first horizontal shaft 23, a plurality of first flail cutting blades 24, and an input branch relay unit 140.

  Similarly to the input branch relay unit 40 of the first embodiment, the input branch relay unit 140 branches power supplied from the engine 8 toward the first horizontal shaft 23 toward the second mowing device 150. As shown in FIG. 6, the power input shaft 142 of the input branch relay unit 140 is linked to the first horizontal shaft 23 via the chain and sprocket transmission system 22.

  Thereby, a part of the power from the engine 8 is transmitted to the power relay mechanism 180 and the remaining part is transmitted to the first horizontal shaft 23. As a result, the first horizontal shaft 23 is rotated by a part of the power branched by the input branch relay unit 140, and the second horizontal shaft 53 is rotated by the remaining power.

  Similar to the first mowing device 120, the second mowing device 150 is of the flail type (hammer knife type). The second mowing device 150 is connected to the first mowing device 120 via a hinge 6 connecting the first mowing device 120 and the first mowing device 120 so as to be swingable up and down around the rotation shaft 6a of the hinge 6. As shown in FIGS. 1 and 2, the second mowing apparatus 150 mainly includes a second horizontal shaft 53, a plurality of second flail cutting blades 54, and an output relay unit 170.

  The output relay unit 170 relays power from the input branch relay unit 140 via the power relay mechanism 180 and transmits it to the second horizontal axis 53 side. As shown in FIG. 6, a power output shaft 172 that is rotatably disposed on the second mowing device 150 side in a posture extending in a direction intersecting with the second horizontal shaft 53 is connected to the second via a chain and sprocket transmission system 52. The horizontal shaft 53 is interlocked and connected.

  The power relay mechanism 180 transmits a part of the driving force supplied from the engine 8 and directed to the first mowing device 120 to the second mowing device 150. As shown in FIG. 6, the power relay mechanism 180 mainly includes an input-side universal joint 181 connected to the power input shaft 142, an expansion / contraction rod 185, and an output-side universal joint 186 connected to the power output shaft 172. Is included.

  The expansion / contraction rod 185 is configured to be extendable / contractable in the axial direction thereof, and has an input side universal joint 181 and an output side universal joint 186 linked to both ends thereof. The power input shaft 142 is rotatably supported on the first mowing device 120 side, and the power output shaft 172 is rotatably supported on the second mowing device 150 side.

<2.2. Mowing work>
FIG. 7 is a rear view showing a positional relationship between the first mowing device 120 and the second mowing device 150 when the first mowing device 120 and the second mowing device 150 perform a plane mowing work, respectively. FIG. 8 shows the first mowing device 120 and the second mowing when the first mowing device 120 performs the mowing work on the shore plane and the second mowing device 150 performs the mowing work on the slope. 4 is a rear view showing the positional relationship of the device 150. FIG.

  For example, when the mowing work on the shore plane and the slope is performed at the same time, the second mowing device 150 swings up and down with respect to the first mowing device 120, and the second mowing device 150 with respect to the first mowing device 120. The posture changes. And according to this posture change, the distance between the main body shaft 142 and the movable shaft 172 increases.

  As a result, the first universal joint 181 and the movable universal joint 186 of the power relay mechanism 180 bend according to the posture change of the first mowing device 120 and the second mowing device 150. At the same time, the telescopic rod 185 of the power relay mechanism 180 further expands in accordance with this posture change. For this reason, even when the second mowing apparatus 150 swings up and down with respect to the first mowing apparatus 120, power can be stably transmitted to the second mowing apparatus 150.

<2.3. Advantages of Mower of Second Embodiment>
As described above, the mowing machine 200 according to the second embodiment can simultaneously perform mowing work on each of the shore plane and the slope, similarly to the mowing machine 100 according to the first embodiment. Efficiency can be improved.

  The power relay mechanism 180 can be realized with a simple configuration. Therefore, the number of parts of the power relay mechanism 180 can be reduced.

<3. Modification>
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

  (1) In the first embodiment, the first power transmission case 81 of the power relay mechanism 80 has been described as adopting a chain drive system using a sprocket and a chain, but is not limited to this. . For example, a method using a pulley and a belt may be employed.

  (2) Further, in the first and second embodiments, the first mowing devices 20 and 120 have been described as performing plane mowing work, and the second mowing devices 50 and 150 have been performed as performing slope mowing work. However, it is not limited to this. For example, a slope mowing operation may be performed by the first mowing devices 20 and 120, and an upper mowing operation may be performed by the second mowing devices 50 and 150, respectively.

6 Hinge 6a Rotating shaft 8 Engine (drive source)
20, 120 First mowing device 23 First horizontal shaft 24 First flail cutting blade 50, 150 Second mowing device 53 Second horizontal shaft 54 Second flail cutting blade 80, 180 Power relay mechanism 85 Transmission shaft 100, 200 Mower 181 Input side universal joint 185 Telescopic rod 186 Output side universal joint

Claims (4)

A drive source mounted on the airframe; first and second grass-type mowers arranged side by side on the lower side of the airframe; and the power from the drive source toward the first mowing device is branched. 2 It has a power relay mechanism that transmits to the mowing device,
The two grass cutting devices are connected to the first grass cutting device so as to be swingable up and down around a rotation axis extending in the traveling direction of the machine body,
The power relay mechanism is configured to be adjustable in length according to a vertical swinging posture of the second mowing device with respect to the first mowing device.
Mower. Each of the mowing devices includes a horizontal shaft that is rotated by power transmitted to the mowing devices, a plurality of flail cutting blades provided on the outer peripheral side of the horizontal shaft, and a device that covers the upper side of the flail cutting blade group. With a cover,
The rotating shaft is positioned on the lower side of the left and right side plate portions adjacent to each other in the device covers,
The mower according to claim 1. The power relay mechanism includes a pair of left and right power transmission cases connected to be able to transmit power and bend and rotate via a transmission shaft extending in the traveling direction of the airframe.
The mower according to claim 2. A power input shaft that is rotatably arranged on the first mowing device side in a posture that extends in a direction that intersects the horizontal axis, and that can be rotated on the second mowing device side in a posture that also extends in a direction that intersects the horizontal axis. And a power output shaft arranged in the
The front machine power relay mechanism is an input side universal joint connected to the power input shaft, an output side universal joint connected to the front machine power output shaft, and both of them are linked together and can extend and contract in the axial direction. With a telescopic rod configured to,
The mower according to claim 2.

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