JP3363061B2 - Row mower - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a road surface reaping device for cutting grass that has grown on a traveling road surface near the center of the left and right sides of a walking type traveling body, and a lateral one side of the traveling body. In addition, the present invention relates to a ridge mower having a slope cutting device for cutting grass grown on an inclined surface connected to one side end of the traveling road surface.

[0002]

2. Description of the Related Art Conventionally, in the above ridge mower,
The steering handle is, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-95229, a state in which the left and right center of the steering handle is located on the left and right center of the traveling body, in other words, a state of being symmetrical with respect to the center of the body. Was installed in.

[0003]

However, in the ridge mower as described above, since the slope cutting device is provided on one lateral side of the traveling machine body, the slope cutting device side becomes heavy. Since it has a drawback that the stability becomes poor, it is not necessary to dispose the steering handle in such a state that the left and right center of the steering handle is located on the left and right center of the traveling body as in the above-mentioned conventional technique. It becomes difficult to keep the balance of the heavy ridge mower on the side of the reaping device, and it becomes difficult to operate the reaping device against the weight of the slope cutting device, so that the handle is taken by the slope cutting device side. The unevenness of the cutting height due to the slope cutting device is not uniform, and the ridge mower tilts toward the slope cutting device side, which causes the slope cutting device to scrape the soil on the sloped surface and damage the cutting blade. There was a lot of fear. In addition, during the mowing work, the steering reaction force received by the slope cutting device makes it easier for the handle to be picked up by the slope cutting device side. In order to be able to work, the maneuvering operation required considerable effort. In addition, since the left and right center of the steering wheel is located on the left and right center of the traveling body, there is also a problem that the steering wheel is close to the inclined surface and it is difficult for the operator to walk during mowing work. It was

The object of the present invention is to facilitate the maneuvering operation against the weight of the slope cutting device and the cutting reaction force received by the slope cutting device, and to facilitate the walking of the operator during the cutting work. (EN) Provided is a ridge mower with improved maneuverability.

[0005]

In order to achieve the above object, in the invention according to claim 1 of the present invention, grasses growing on a traveling road surface are provided near the left and right center of a walking type traveling machine body. While arranging a road surface reaping device for mowing, a lateral surface of the traveling machine body, a slope surface reaping device for reaping grasses that grow on an inclined surface continuous to one end of the traveling road surface is arranged, and A rotating blade that is placed adjacent to the reaper
The first mowing part with the second mowing part with the rotating blade
Around the drive shaft core of the rotary blade of the first cutting unit
It can swing back and forth and the first part around the drive shaft core.
The holding posture of the second mowing part with respect to the mowing part can be switched
Mow the slope harvesting device by connecting as much as possible.
A width-changeable steering handle extending toward the rear of the fuselage is disposed such that the left-right center of the steering handle is offset to the opposite side of the slope harvesting device from the left-right center of the traveling body.

According to the invention described in claim 1, the first cutting
Move the second mowing part back and forth around the drive shaft center of the rotating blade of the mowing part.
Swing operation to hold the second mowing part against the first mowing part
Change the cutting width of the slope harvesting device by switching the power
You will be able to. In addition, since the left and right center of the steering wheel is deviated to the opposite side of the slope harvesting device from the left and right center of the traveling body, when the left and right center of the steering wheel is located on the left and right center of the traveling body. Compared to, the rush mower is biased to the opposite side of the slope mower to keep the rush mower balanced, or to prevent the handle from being taken by the slope mower. It is possible to reduce the operating force required to perform operations such as steering and urging the ridge mower to the side opposite the slope cutting device, so that the slope cutting device side becomes heavier. It makes it easier to keep your mower balanced,
The maneuvering operation against the weight of the slope harvesting device is facilitated. In other words, the handle is taken by the slope cutting device side and the cutting height by the slope cutting device becomes uneven,
It is possible to prevent the possibility that the slope mower tilts the ridge mower toward the slope cutting device to scrape the soil on the slope and damage the cutting blade.

Further, since the operating force required for the operation for preventing the handle from being taken by the slope cutting device can be reduced, the handle is further moved by the cutting reaction force received by the slope cutting device during the cutting work. Even if it is easy to be picked up by the slope cutting device side, it can be sufficiently dealt with by operating the steering handle, so that traveling can be easily stabilized and good cutting work can be performed.

In addition, the lateral center of the steering handle is offset from the lateral center of the traveling body to the side opposite to the slope harvesting device, so that the lateral center of the steering handle is located on the lateral center of the traveling body. Compared to the case where the cutting operation is performed, since the steering handle is located on the side away from the inclined surface during the cutting operation, it is possible to avoid the inconvenience that it is difficult for the operator to walk during the cutting operation.

Therefore, the length of the work surface for the mowing work
The cutting width of the slope cutting device can be changed according to
In addition, it is easy to perform a steering operation against the weight of the slope cutting device and the cutting reaction force received by the slope cutting device, and it is possible to facilitate the walking of the operator during the cutting work, Not only can the maneuverability be improved, the cutting height accuracy can be improved, and further damage to the cutting blade due to the slope cutting device scraping the soil on the slope can be suppressed. To provide the opportunity.

In the invention according to claim 2 of the present invention,
In the invention according to claim 1 , the slope cutting device
A grounding body having a grounding surface with a convex curved surface was attached to the drive shaft of the rotating blade located at the outermost lateral end .

According to the second aspect of the present invention, the grounding body is grounded on the inclined surface, so that the mowing operation can be performed.
It becomes possible to eliminate the possibility that the slope cutting device scrapes the soil on the inclined surface and damages the cutting blade. Further, the weight of the slope cutting device can be received by the inclined surface via the grounding body, and thus the handle can be prevented from being taken by the slope cutting device side due to the weight of the slope cutting device. Therefore, it becomes easy to keep the balance of the ridge mower, and it becomes easy to perform the steering operation against the weight of the slope cutting device. That is, it becomes possible to more appropriately suppress the inconvenience that the cutting heights of the slope cutting device become uneven. Moreover, since the grounding body rotates together with the rotary blade during the mowing work, this rotation can generate a propulsive force that opposes the mowing reaction force received by the slope cutting device during the mowing work. It becomes possible to reduce the reaction force. That is, since it becomes easier to perform the steering operation against the cutting reaction force received by the slope cutting device, it is possible to stabilize the traveling more easily and perform better cutting work.

Therefore, the maneuvering operation against the weight of the slope cutting device and the cutting reaction force received by the slope cutting device can be performed more easily, and the steerability can be further improved. At the same time, it is possible to further improve the cutting height accuracy, and further to provide a ridge mower capable of avoiding damage to the cutting blade caused by the slope cutting device scraping the soil on the slope. I arrived.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entire side surface of the ridge mower, and FIG.
Shows the entire plane of the ridge mower, respectively. This ridge mower has a walking type traveling body 1, a road surface mowing device 2 for cutting grass growing on a traveling road surface, and a traveling road surface. It is composed of a slope harvesting device 3 for harvesting grass grown on an inclined surface that is continuous with one side end, and the like. Traveling aircraft 1
Is a substantially L-shaped side body frame 4 and a side body frame 4
5, the engine 5 mounted on the vehicle, the mission case 6 standing upright behind the fuselage frame 4, the output shaft 5 of the engine 5.
a to a belt type transmission mechanism 7 extending from an input shaft 6a provided on the upper side of the mission case 6, drive wheels 8 provided on the lower left lateral side of the mission case 6, and rearward from the body frame 4. The steering handle 9 is extended toward the. The road surface mowing device 2 is supported by a body frame 4 so as to be located in front of the drive wheels 8 and near the left-right center of the traveling body 1. The slope harvesting device 3 is connected to the left end of the road harvesting device 2 so as to be located on the left lateral side of the traveling vehicle body 1.
Front wheels 10 are provided in front of the road surface mowing device 2 so that the load of the road surface mowing device 2 can be run in a stable posture in which the load is kept on the ground. An auxiliary wheel 11 is provided in front of the slope harvesting device 3 so that the load of the slope harvesting device 3 can be run in a stable posture with the load kept on the ground. Steering wheel 9
Is a connection fulcrum P facing left and right on the upper rear end of the body frame 4.
It is connected so that it can swing up and down around 1, and the height position of the extension end can be changed to a height position according to the height of the operator by the vertical swinging operation so that maneuverability can be improved. Has become. In addition, the steering handle 9 is a bolt 12 with a knob.
It is configured such that it can be fixed to the machine body frame 4 in a desired swinging posture by tightening. The height adjustment operation of the extension end can be easily performed without using a tool.

As shown in FIGS. 1 to 9, a road surface mowing device 2
Is a housing 13 extending horizontally from the front of the machine body frame 4 toward the front, and a single rotary blade 14 rotatably mounted in the housing 13 about a vertically oriented drive shaft core P2. , And so on. The housing 13 is composed of a sheet metal top plate 13A fixed to the front part of the machine body frame 4 and a rubber plate 13B connected to the top plate 13A so as to form a right wall portion and a rear wall portion. . The slope harvesting device 3 is equipped with a housing 15 connected to the left end of the road harvesting device 2 so as to be vertically swingable around a front-rear axis P3, and rotatably within the housing 15 around a drive axis P4. The first mowing portion 3A including the one rotating blade 16 that is formed, the housing 17 that is swingably connected back and forth around the drive shaft core P4 of the first mowing portion 3A, and the housing 17 is provided in parallel in the housing 17. The second cutting section 3B is composed of two rotary blades 18 and 19 rotatably mounted around the drive shaft cores P5 and P6, and the like. The housing 15 of the first reaper 3A is composed of a top plate 15A made of sheet metal. The housing 17 of the second reaper 3B forms a top plate 17A made of sheet metal and a left wall portion and a rear wall portion in a state where the second reaper 3B is located on the left side of the first reaper 3A. It is composed of a rubber plate 17B connected to the top plate 17A. That is, the slope cutting device 3 is connected to the left end of the road cutting device 2 so as to be vertically swingable around the front-rear axis P3. The device 3 can be changed to a posture along the work surface for performing the mowing work. In addition, the slope harvesting device 3 includes the second harvesting unit 3B with respect to the first harvesting unit 3A.
Is configured to be swingable back and forth around the drive shaft core P4, and by the swinging operation of the second mowing portion 3B back and forth, the mowing width of the slope of the work surface on which the mowing device 3 for mowing is to perform mowing work. The length can be changed according to the length.

The front and rear swinging range of the second mowing section 3B is slightly leftward of the position immediately to the left of the first mowing section 3A, and is leftwardly displaced to the left side position (around the drive shaft core P4). (See FIGS. 2, 3 and 6) From the rear position (see FIGS. 4 and 7), which is pivotally displaced around the drive shaft core P4 slightly leftward from the position substantially immediately after the first mowing portion 3A. The rotary blades 18 and 19 are arranged so as to be aligned in the left-right direction of the machine body at the left side position, and are arranged in the front-back direction of the machine body at the rear position. There is. That is, the second reaper 3B is replaced by the first reaper 3A.
The cutting width of the slope harvesting device 3 can be maximized by locating it at the left side position with respect to
By arranging the second mowing section 3B at a rear position with respect to the first mowing section 3A, the mowing width of the slope cutting device 3 can be minimized. In addition, by setting the front-back swing range of the second mowing section 3B as described above, the front edge of the housing 17 of the second mowing section 3B moves backward toward the extension end side in any swinging posture. Because of the inclined position, the second mowing section 3 is used during mowing work.
From the resistance of the grass received by the front edge of the housing 17 of B,
It is possible to generate a component force that moves the slope harvesting device 3 toward or away from the machine body, and at the same time, the second harvesting unit 3
The rearward pressing force due to the resistance of the grass to the B housing 17 can be reduced, so that the maneuverability during the mowing work can be improved.

As shown in FIGS. 3 to 7, the road surface mowing device 2
The rotary blades 14 and the rotary blades 16, 18, and 19 of the slope harvesting device 3 are closely arranged so that adjacent ones are in a state where a part of each cutting region (rotation locus) overlaps with each other, Each of them is set to rotate in a rotation phase that can avoid contact between adjacent objects. Further, when changing the cutting width of the slope cutting device 3 as described above, the second cutting portion 3B is swung back and forth around the drive shaft core P4 of the rotary blade 16 of the first cutting portion 3A. The distance between the rotary blades 14, 16, 18, and 19 can be kept constant regardless of the cutting width of the slope cutting device 3. That is, at the time of the mowing work, regardless of the change in the mowing width of the slope cutting device 3, between the road cutting device 2 and the slope cutting device 3 and the first cutting portion 3A of the slope cutting device 3 and the first cutting unit 3A. Between the second reaper 3B,
And uncut residue occurs between the rotary blades 18 and 19 of the second mowing unit 3B, and the rotary blades 14 and 1
Adjacent ones of 6, 18, 19 contact each other,
It is configured so as to avoid inconveniences such as.

As shown in FIGS. 1 to 9, a road surface mowing device 2
The drive shafts 14a and 16a of the rotary blades 14 and 16 respectively installed in the first harvesting section 3A of the slope harvesting device 3 are interlocked by the first transmission mechanism 20. The first transmission mechanism 20 is a bevel gear type first gear transmission unit 2 that is connected to the drive shaft 14a of the road surface mowing device 2 so as to be transmittable.
0A, a bevel gear type second gear transmission portion 20B that is connected to the drive shaft 16a of the first harvesting portion 3A so as to be transmittable, a shaft transmission portion 20C configured to be extendable and contractible, and respective gear transmission portions 20A and 20B thereof. A universal joint 20D, which is connected to the shaft transmission portion 20C so as to be capable of being transmitted, is configured to be bendable and extendable, and the rocking of the slope cutting device 3 with respect to the road cutting device 2 about the front-rear axis P3 is vertically rocked. Is tolerated. At the end of the first transmission mechanism 20 on the side of the slope cutting device 3, the second cutting portion 3 of the slope cutting device 3 is provided.
Drive shaft 18 of each rotating blade 18, 19 equipped on B
A second transmission mechanism 21 for interlockingly connecting a and 19a is operably connected. The second transmission mechanism 21 is a bevel gear-type first gear transmission portion 21 </ b> A, which is connected to the second gear transmission portion 20 </ b> B of the first transmission mechanism 20 so as to be able to transmit power, and the first harvesting portion 3.
Bevel gear type second gear transmission portion 21 that is connected to the drive shaft 18a of the rotary blade 18 adjacent to A so as to be transmittable.
B, the rotary blade 19 on the side separated from the first mowing section 3A
Bevel gear-type third gear transmission portion 21C that is movably connected to the drive shaft 19a of
A shaft transmission part 21 for connecting A, 21B and 21C in a power transmission manner
D, etc., is configured to be capable of integrally swinging back and forth around the drive shaft core P4 with the second mowing portion 3B.
The input shaft 2 is attached to the first gear transmission portion 20A of the first transmission mechanism 20.
0a equipped with this input shaft 20a and the engine 5
A belt tension type reaping clutch 22 is installed across the output shaft 5a.

That is, in the road surface mowing device 2, the rotary blade 14 is driven by the power from the engine 5 transmitted through the mowing clutch 22 and the first transmission mechanism 20. In addition, the mowing device 3 for slope cuts regardless of the posture change due to vertical swinging around the front and rear axis P3 and the cutting width change due to forward and backward swinging of the second mowing section 3B around the drive axis P4. Clutch 22, first transmission mechanism 2
0 and the power from the engine 5 transmitted via the second transmission mechanism 21 to the rotary blades 16 and 1 respectively.
8 and 19 are driven.

As shown in FIGS. 1 to 5, 17 and 18, the slope harvesting device 3 is provided with a first operating lever erected on the right handlebar 9A of the steering handle 9 so as to be swingable back and forth. 23, an operation arm 24 swingably supported by the first gear transmission portion 20A of the first transmission mechanism 20, a release wire 25 extending from the first operation lever 23 to the operation arm 24, and an operation arm 24 The first transmission mechanism 20 fixed to the housing 15 of the reaping section 3A is linked to the second gear transmission section 20B via an operation rod 26 and the like. The first operation lever 23 can be held at a desired operation position by engaging with a guide plate 27 mounted on the right handle rod 9A. In other words, by swinging the first operation lever 23 to the rear side against the weight of the slope cutting device 3, the slope cutting device 3 can be swung up and down around the front-rear axis P3, and By swinging the first operating lever 23 to the front side, the slope harvesting device 3 can be swung down around the front-rear axis P3 by its own weight. Further, by engaging the first operation lever 23 with the guide plate 27 at a desired operation position, the slope cutting device 3 can be held in a desired posture around the front-rear axis P3. A gas cylinder 28 for assisting is installed from the housing 13 of the road surface mowing device 2 to the operation arm 24 so as to reduce the operation force when the slope cutting device 3 is swung upward by the first operation lever 23. This gas cylinder 28
By the action, the upward swinging operation of the slope cutting device 3 by the first operating lever 23 can be performed by a light operation.

As shown in FIGS. 1 to 5 and FIG. 19, the second mowing section 3B of the slope mowing device 3 swings back and forth integrally with the second mowing section 3B around the drive axis P4 of the first mowing section 3A. The moving second transmission mechanism 21 is linked via a push-pull wire 30 to a second operating lever 29 that is erected on the left handle rod 9B of the steering handle 9 so as to be swingable back and forth. In other words, the second cutting lever 3 can be swung back and forth around the drive shaft core P4 of the first mowing portion 3A by swinging the second operating lever 29 back and forth, so that the mowing device 3 for the slope is cut. The width can be changed. The second operation lever 29 includes the second gear transmission portion 2 of the first transmission mechanism 20.
The operating rod 33 for releasing the engagement of the engagement arm 32 swingably supported by the shaft transmission portion 21D of the second transmission mechanism 21 with respect to the fan-shaped engaged plate 31 fixed to 0B is internally fitted. . The operating rod 33 and the engaging arm 32 are pivotally connected to the lower end of the operating rod 33 and are supported by the second operating lever 29 so as to be swingable back and forth, and from the crank arm 34 to the engaging arm 32. Release wire 35 across
Are coordinated by. The operating rod 33 is urged so as to project from the upper portion of the second operating lever 29 by a tension spring 36 hung from the second operating lever 29 over the crank arm 34. The engagement arm 32 is biased by a spiral spring 37 so as to engage with the engaged plate 31. That is, the engagement of the engaging arm 32 with the engaged plate 31 can be released by pushing the operating rod 33 against the tension spring 36 and the spiral spring 37, and in this state, The operation lever 29 can be used to perform a back-and-forth swinging operation of the second mowing section 3B. Further, by releasing the pushing operation of the operating rod 33, the engaging arm 32 can be engaged with the engaged plate 31 by the urging of the spiral spring 37.
Therefore, the second cutting section 3B can be held in a desired posture around the drive shaft core P4.

As shown in FIGS. 1 and 19, the mowing clutch 22 includes a steering wheel 9 on the left side of the steering wheel 9.
B is linked via a release wire 39 to a harvesting clutch lever 38 that is vertically swingable, and the handlebar 9B on the left side and the harvesting clutch lever 38 are gripped together to move the harvesting clutch lever 38 upward. It is configured as a deadman system that can be switched to a transmission state by rocking operation.

As shown in FIGS. 2 to 4, 6 and 7, at the rear end of the first mowing section 3A of the slope cutting device 3, there is a grass cut by the first mowing section 3A. A rear wall body 40 that prevents the rearward scattering is provided. Back wall 40
Is composed of a rubber plate 40A that forms a rear wall portion and a support member 40B that supports the rubber plate 40A, and is capable of swinging back and forth around a vertical axis P7 set on an extension line of the front and rear axis P3. Further, the second cutting portion is supported by a bracket 3a extending rearward from the first cutting portion 3A of the slope cutting device 2 so as to be vertically swingable around the front-rear axis P3. It is linked to 3B via a link 41. That is, the rear wall body 40 swings back and forth around the vertical axis P7 in conjunction with the forward and backward swinging operation of the second reaper 3B around the drive axis P4, and at the slope around the front and rear axis P3. It is configured to swing up and down around the coaxial core P3 in conjunction with the vertical swinging operation of the harvesting device 3, whereby the second harvesting section 3B is moved back and forth around the drive shaft core P4 of the first harvesting section 3A. Regardless of changing the cutting width of the slope cutting device 3 to be swung and changing the attitude of the slope cutting device 3 around the front-rear axis P3, scattering of cut grass or the like from the first cutting portion 3A to the rear side is possible. The second cutting section 3B can be prevented and the second cutting section 3B can be installed at the rear end of the first cutting section 3A.
Slope reaping device 3 which swings back and forth around the drive shaft core P4 of
It is prevented that it becomes an obstacle when changing the cutting width.

As shown in FIGS. 3 to 5, when the cutting width of the slope cutting device 3 for swinging the second cutting portion 3B back and forth around the drive axis P4 of the first cutting portion 3A is changed, the cutting width is changed. Since the housing 15 of the first mowing portion 3A and the housing 17 of the second mowing portion 3B may be separated from each other due to the operation to form a gap, the cover 42 for filling the gap is used as the second mowing portion. First cutting section 3A in housing 17 of section 3B
It extends from the side end toward the first mowing section 3A.
That is, since the cover 42 is provided at the end of the housing 17 of the second mowing unit 3B on the side of the first mowing unit 3A, the mowing width of the slope mowing device 3 is changed during the mowing operation to change the mowing device 3 for the slope. It is possible to prevent the cut grass from scattering from the gap formed between the housings 15 and 17 of the above. It should be noted that the housing 1 of the first reaper 3A
A pressing plate 43 for preventing the cover 42 from being lifted from the upper surface of the first mowing section 3A is provided on the upper surface portion of the second mowing section 3B side of the first mowing section 3A. It is possible to prevent the cut grass from scattering from between the upper surface of the cover and the cover 42.

As shown in FIGS. 7 and 20, the slope cutting device 3 has the free end of the second cutting portion 3B in the minimum cutting width state in which the free end of the second cutting portion 3B is located at the rearmost position. Is set so as to be located near the rear end of the drive wheel 8, whereby the front side of the machine body can be greatly floated with the support shaft 8a of the drive wheel 8 as a fulcrum. That is, for example, when it is necessary to get over the step portion while traveling in a state where the free end of the second mowing unit 3B is located at the rearmost position and the lateral width of the machine body is minimized, the second mowing unit 3B In the case where the free end is set to be located rearwardly of the rear end of the drive wheel 8, even if the front side of the machine body is to be levitated using the axle 8a of the drive wheel 8 as a fulcrum, the second cutting section 3B Since the free end of the aircraft cannot contact the road surface and thus the front side of the machine body cannot be greatly levitated, the step portion cannot be easily overcome.However, in the above configuration, Mowing part 3B
Since the free end of the drive wheel 8 is set near the rear end of the drive wheel 8, as shown in FIG. 20, the front side of the machine body should be greatly floated with the support shaft 8a of the drive wheel 8 as the fulcrum. Since it is possible, it is possible to easily get over the step.

As shown in FIGS. 6 and 7, the road surface mowing device 2 is constructed such that the rotary blade 14 rotates counterclockwise in plan view. The slope harvesting device 3 includes the second harvesting unit 3
The rotary blade 18 on the side of the first cutting section 3A in B is configured to rotate counterclockwise in plan view, and the other rotary blades 16 and 19 rotate clockwise in plan view. With this configuration, the rotary blade 14 of the road surface mowing device 2 and the mowing grass mowed by the rotary blade 16 of the first mowing unit 3A of the slope cutting device 3 are removed by the action of the respective rotary blades 14 and 16 from each other. It can be guided between the rotary blades 14 and 16 and can be smoothly discharged rearward from between the rotary blades 14 and 16. Also, the rotary blades 18 and 19 of the second mowing unit 3B of the slope cutting device 3 can be discharged. By the action of the rotary blades 18 and 19, the cut grass cut by can be guided between the rotary blades 18 and 19, and can be smoothly discharged rearward from between the rotary blades 18 and 19. Has become. That is, when the rotary blade 14 of the road surface mowing device 2 is configured to rotate clockwise in plan view, the grass cut by the rotary blade 14 is the housing 13 and the rotary blade 14 of the road surface mowing device 2. In the case where the rotary blade 19 on the free end side of the second mowing section 3B of the slope cutting device 3 is rotated counterclockwise in plan view, inconvenience of being accumulated between the second mowing device and the traveling device. Generated by the rotary blade 19 of the rotary blade 19 and the housing 17 of the second reaper 3B and the rotary blade 1
9 and the troubles such as the accumulation of dust and damage to the cutting and running, and further the respective rotary blades 14, 16, 1
The cutting grasses cut by the rotary blades 14, 16, 18, and 19 that are generated when the rotating blades 8 and 19 are configured to rotate in the same direction are accumulated without being discharged from between the cutting blades and cutting or running. It is excellent in terms of reaping performance and running performance, which can avoid inconveniences such as hindrance to the road.

As shown in FIGS. 2, 6 and 7, the drive wheel 8 is mounted on the drive shaft 8a extending from the lower part of the mission case 6 which is the support shaft 8a thereof toward the left outer side. It is composed of a pair of rubber tires 8A, and is driven by the power from the engine 5 transmitted via the mission case 6. As shown in FIGS. 15 and 16, on the upper side of the mission case 6,
A deceleration mechanism A for traveling, which is drivingly connected to the input shaft 6a, is provided. The deceleration mechanism A includes a transmission unit Aa capable of decelerating by switching the power from the engine 5 between high and low stages.
And a clutch portion Ab for connecting and disconnecting the transmission from the engine 5 to the drive wheels 8. More specifically, the speed reduction mechanism A includes a first high speed gear 44, a first low speed gear 45, a second high speed gear 46 meshing with the first high speed gear 44, a first high speed gear 46, which is fitted on the input shaft 6a so as to be relatively rotatable. A second low speed gear 47, a second high speed gear 46 and a second low speed gear 47 that mesh with the gear 45.
Is externally rotatably fitted to the input shaft 6a while meshing with a transmission shaft 48 provided below the input shaft 6a so as to support the input shaft 6a and a first relay gear 48a formed integrally with the transmission shaft 48. The second relay gear 49, which is externally fitted to the input shaft 6a so as to be relatively rotatable and slidably movable, and which is integrally engaged with the second relay gear 49 by a sliding operation.
Shift gear 5 having a meshing pawl 50a capable of meshing with 9a
0, and a final gear 51 that is fitted onto the transmission shaft 48 so as to be relatively rotatable while meshing with the shift gear 50. Of these, the first high speed gear 44, the first low speed gear 45, The second high-speed gear 46 and the second low-speed gear 47 form a transmission unit Aa. The second relay gear 49 and the shift gear 50 form a clutch portion Ab. An output sprocket 52 is integrally rotatably mounted on the final gear 51 of the reduction mechanism A. From the output sprocket 52, an input sprocket 53 is integrally rotatably mounted on a drive shaft 8a for driving the drive wheels 8.
A chain 54 is wound over the entire length. That is,
With the above configuration, the drive wheel 8 is configured so that the power from the engine 5 is transmitted in an intermittently switchable manner and in a high / low two-stage switchable manner.

As shown in FIGS. 1, 2 and 15, the shifting operation of the shifting portion Aa is performed by swinging the shifting lever 55 extending leftward from the upper left side of the transmission case 6 in the left-right direction. By sliding the shift shaft 56 with the key 56a that is slidably fitted into the input shaft 6a,
The key 56a can be selectively engaged with the first high speed gear 44 or the first low speed gear 45. Further, as shown in FIGS. 1 and 17, the clutch portion Ab
The switching operation of the shift gear 50 to the shift fork 5
7 and the release wire 58 are linked to each other to shift the traveling clutch lever 59, which is provided on the right handlebar 9A of the steering handle 9 so as to be vertically swingable, by gripping with the right handlebar 9A. Fork 57
It is configured as a dead man system in which the transmission state is switched by swinging upward against the urging force of a spring (not shown) that operates in the transmission cutting direction.

As shown in FIGS. 1 to 4, 15 and 16, the front wheel 10 is a power takeoff shaft disposed between the reduction gear mechanism A in the mission case 6 and the drive shaft 8a for driving the drive wheels 8. 6b includes a first chain type transmission mechanism 61 extending from the power take-off shaft 6b to the relay transmission shaft mechanism 60 supported by the housing 13 of the road surface cutting device 2, and the relay transmission shaft mechanism 6
The second chain-type transmission mechanism 62 extending from 0 to the support shaft 10a of the front wheel 10 is connected for transmission. A chain 54 wound around the power take-off shaft 6b from an output sprocket 52 mounted on the transmission shaft 48 of the reduction mechanism A to an input sprocket 53 mounted on the drive shaft 8a.
Further, a sprocket 6c that meshes in the winding path is integrally rotatably connected. That is, front wheel 1
0 is driven by power from the engine 5 transmitted through the belt type transmission mechanism 7, the transmission case 6, the first chain type transmission mechanism 61, the relay transmission shaft mechanism 60, and the second chain type transmission mechanism 62. It is like this.

With the above configuration, for example, when a ridge mower is crossed over a waterway for irrigation that divides a running path such as an agricultural road, either one of the front and rear wheels 8 or 10 is lifted and the other wheel 10 or Even if you run only 8
The driving force of the other wheel 10 or 8 can sufficiently obtain the propulsive force for traveling the airframe. That is, when the front wheels 10 are simply idle wheels, the front wheels 1
In order to obtain propulsive force when traveling with only 0, it is necessary to push out the vehicle body (when moving forward) or pull it (when moving backward) while lifting the drive wheels 8, which requires considerable labor. However, in the above configuration, since the front wheels 10 are also drive wheels, the front wheels 10
Even when traveling only by itself, it is possible to obtain sufficient propulsive force for traveling the aircraft even without performing an operation for obtaining propulsive force such as pushing out or pulling the aircraft, so that only the front wheels 10 are provided. You can considerably reduce the effort when driving in. In addition, even if the condition of the traveling path when the rush mower is driven by only one wheel 8 or 10 is a condition where weeds are overgrown or undulating, the wheels 8 and 10 are driven by the drive wheels. Therefore, it is possible to easily drive the ridge mower against overgrown weeds and the ups and downs of the road.

In short, either one of the wheels 8 or 10
However, since it is possible to obtain sufficient propulsion force to drive the ridge mower against overgrown weeds and the ups and downs of the traveling path, it is necessary to lift only one wheel 8 or 10 to drive the ridge mower. It is possible to easily cross a waterway that divides a road such as a farm road. Moreover, since the front wheels 10 are also drive wheels, sufficient propulsive force can be obtained even if the soil in the work site is soft, so that workability can be improved.
Further, by disposing the power take-off shaft 6b for driving the front wheels 10 higher than the drive shaft 8a for driving the drive wheels 8, the transmission system for driving the front wheels 10 is affected by the inclination of the body or the unevenness of the ground. It is possible to prevent damage from contact with the ground.

As shown in FIGS. 1-4 and 12-14,
The second chain type transmission mechanism 62 includes a support bracket 63 having a pair of left and right support walls 63a and 63b mounted on the housing 13 of the road surface mowing device 2 so as to be swingable left and right about a vertical axis P8. The front wheel 10 is attached to the extending end of the front wheel 10 while being extended forward while being supported so as to be vertically swingable around the axis P9. That is,
The steering angle of the front wheel 10 can be adjusted by the horizontal swing operation around the vertical axis P8 of the second chain type transmission mechanism 62, and the road surface can be adjusted by the vertical swing operation around the horizontal axis P9 of the second chain type transmission mechanism 62. Front wheel 10 for the harvesting device 2
The height position of the road surface can be changed, and the cutting height by the road surface cutting device 2 can be changed. Then, the second chain type transmission mechanism 62 is tightened with the knob bolt 64 having the expanded diameter portion 64a, and a plurality of the second chain type transmission mechanism 62 is provided on the left side support wall 63a of the support bracket 63 (in the present embodiment, as shown in FIG. By engaging with any one of the enlarged diameter portions 65a of the elongated holes 65 formed so as to have the enlarged diameter portion 65a, it can be fixed in a desired swinging posture without using a tool. Thus, the cutting height changing operation of the road surface cutting device 2 can be easily performed.

The relay transmission shaft mechanism 60 includes an input shaft 60a operably connected to the first chain type transmission mechanism 61, an output shaft 60b operatively connected to the second chain type transmission mechanism 62, and an input shaft 60a. The output shaft 60b and the output shaft 60b are connected to each other by a universal joint 60c and the like so as to be bendable around the vertical axis P8. It's designed to tolerate. The second chain-type transmission mechanism 62 includes a relay transmission shaft mechanism 60 attached to a steering lever 71 extending from the right handlebar 9A rearward so as to be swingable left and right so as to be located in the vicinity of the steering handlebar 9. A crank arm 73 that is swingably supported by a support bracket 72 that supports the crank arm 73,
The steering lever 71 and the crank arm 73 are linked by a first operating rod 74 and a second operating rod 75 that extends from the crank arm 73 to the second chain type transmission mechanism 62. The steering lever 71 is a steering wheel 9
It can be held at a desired operation position by engaging with the guide plate 76 attached to the.

With the above structure, the steering angle of the front wheel 10 which is the driving wheel can be adjusted by swinging the steering lever 71 to the left and right, and the steering lever 71 is moved to the guide plate 76 at the desired operating position. By engaging the front wheels 10, the front wheels 10 can be fixedly held at a desired steering angle, and the front wheels 10 are used for the slope cutting device 3 during mowing work.
By adjusting the steering angle of the front wheels 10 so as to face the other side (see FIGS. 2, 3 and 6), the traveling machine body 1 is moved by the mowing reaction force received by the mowing device 3 for the slope during mowing work. It is possible to prevent the straightness from being impaired by being shaken by the mowing device 3 for the slope, which makes it possible to stabilize the traveling during the mowing work, and at the same time, to reduce the straightness due to the loss of the straightness. Reaper 3
It is possible to prevent the cutting height from becoming uneven. Further, by adjusting the steering angle of the front wheels 10 so that the front wheels 10 face forward and backward during non-working (see FIGS. 4 and 7), it becomes possible to stabilize the traveling during non-working. There is. That is, while reducing the labor required for the maneuvering operation, the stability during traveling can be improved and the cutting height accuracy by the slope cutting device 3 can be improved.

In addition, since the steering lever 71 for adjusting the steering angle of the front wheels 10 is provided in the vicinity of the steering wheel 9, the steering angle of the front wheels 10 can be maintained during the mowing work even when in the steering position. The slope can be easily adjusted to an appropriate steering angle according to the cutting reaction force received by the cutting device 3. Further, even when the vehicle is not in operation, when the traveling machine body 1 is swung to the side of the slope cutting device 3 due to the weight of the slope cutting device 3, the front wheels 10 can be operated while in the steering position. The heading angle can be adjusted to an appropriate steering angle according to the amount of shake. In other words, by disposing the steering lever 71 for adjusting the steering angle of the front wheels 10 in the vicinity of the steering handle 9, the operability of the front wheel steering operation can be improved, and it can be used regardless of whether the operator is working or not. ,
In addition to further improving the stability during traveling, it is possible to further improve the cutting height accuracy during the cutting work.

As shown in FIGS. 2 to 4, 10 and 11, the auxiliary wheel 11 includes a support arm 66 extending forward from the second gear transmission portion 20B of the first transmission mechanism 20, and a support arm 66. A height position relative to the slope harvesting device 3 in front of the first harvesting portion 3A of the slope harvesting device 3 via a support rod 67 extending vertically swingably from the arm 66 around the horizontal axis P10. It is arranged so that it can be changed.
That is, by disposing the auxiliary wheel 11 in front of the first mowing section 3A, the auxiliary wheel 11 can be mowed by the mowing device 3 for slope even when the mowing device 3 for slope is set to the minimum mowing width. Since it can be located within the width, even if the work area is narrow, it is possible to enter the work area even when the work area is narrow and it is necessary to travel with the slope cutting device 3 set to the minimum cutting width. Even on the ground, it is possible to run in a stable posture with the load of the slope harvesting device 3 deposited on the ground.
This makes it possible to improve the stability and workability during traveling. Further, by changing the height position of the auxiliary wheel 11 with respect to the slope cutting device 3, the cutting height by the slope cutting device 3 can be changed. A connecting plate 68 having a plurality of (five in the present embodiment as shown in FIG. 10) connecting holes 68a is attached to the rear end of the supporting rod 67, and the supporting rod 67 connects the connecting rods 68a to each other. By inserting the connecting pin 66a provided on the support arm 66 into any of the holes 68a, it can be fixed in a desired swing posture without using a tool. With this configuration, the cutting height changing operation of the slope cutting device 3 can be easily performed.

As shown in FIGS. 3, 4 and 8-11,
The support rod 67 is rotatably supported by the connecting plate 68 around its axis P11, and the operation arm 67a fixed to the rear portion thereof is fixed to the housing 13 of the road surface harvesting device 2 by a fixed plate. 69 is pivotally connected to a free end of a swing arm 70 that is swingably connected to the front-rear axis P12. With this configuration, the auxiliary wheel 11 mounted on the support rod 67 rotates about the axis P11 of the support rod 67 in conjunction with the vertical swing operation around the front-rear axis P3 of the slope cutting device 3. By this rotation, the posture with respect to the slope harvesting device 3 is changed and maintained in a substantially vertical posture. That is, since the auxiliary wheel 11 is maintained in the substantially vertical posture regardless of the inclination angle of the slope cutting device 3, the auxiliary wheel 11 easily receives the load of the slope cutting device 3, and the load applied to the auxiliary wheel 11 is thereby increased. Since the biting force with respect to the inclined surface obtained by the method becomes large, skid hardly occurs on the inclined surface. As shown in FIGS. 8 and 9, the connecting position of the swing arm 70 to the fixed plate 69 of the road surface mowing device 2 can be changed, and the reference of the auxiliary wheel 11 can be changed by changing the connecting position. The posture can be changed.

As shown in FIG. 2, the steering handlebar 9 is arranged such that its left-right center X1 is offset from the left-right center X2 of the traveling machine body 1 to the opposite side of the slope harvesting device 3. ing. More specifically, while the slope harvesting device 3 is provided on the left front side of the traveling body 1, the center of gravity a of the body is deviated to the left front side of the traveling body 1. The handle rods 9A, 9B are arranged so that the midpoints c of the left and right grips 9a, 9b of the steering handle 9 are located on the line L connecting the center point b of the drive wheel 8 on the left-right center X2 of 1. Is bent and extends rearward from the machine body frame 4. From this configuration, in order to maintain the balance of the ridge mower, the drive wheel 8 is used as a fulcrum to tilt and urge the ridge mower to the opposite side of the slope cutting device 3 (in other words, the drive wheel 8 is used as a fulcrum to move the lawn mower. (The surface mowing device 3 is lifted and urged), or the drive wheel 8 is used as a fulcrum to prevent the steering handle 9 from being picked up by the slope mowing device 3 side. It is possible to reduce the operation force required when the steering handle 9 performs an operation such as urging the steering wheel to the side opposite to No. 3, thereby making it possible to reduce the weight of the rush mower on the slope cutting device 3 side. It becomes easy to keep balance, and the slope harvesting device 3
It becomes easier to carry out the steering operation against the weight of the. In other words, the steering handle 9 is taken by the slope cutting device 3 side and the cutting height by the slope cutting device 3 becomes uneven, and the lawn mower leans toward the slope cutting device 3 side to eliminate the law. The cutting blade 3 for the surface scrapes the soil on the inclined surface to rotate the rotary blades 16, 18,
It is possible to suppress the possibility of damaging 19.

Further, since the operating force required for the operation to prevent the steering handle 9 from being taken by the slope cutting device 3 side can be reduced, the cutting reaction force received by the slope cutting device 3 during the cutting work. Even if the steering handle 9 becomes easier to be picked up by the slope harvesting device 3 side by the operation, it is possible to sufficiently cope with the operation of the steering handle 9, so that the traveling can be easily stabilized. Good cutting work with high cutting height accuracy can be performed.

Moreover, the lateral center X1 of the steering handle 9 is offset from the lateral center X2 of the traveling body 1 to the opposite side of the slope harvesting device 3, so that the lateral center X1 of the steering handle 9 is displaced. Compared to the case where it is located on the left and right center X2 of 1, the steering handle 9
Is located on the side away from the inclined surface, and the operator is also separated from the inclined surface accordingly, and it is possible to avoid the inconvenience that the operator has difficulty walking during the mowing work. ing.

As shown in FIGS. 8 and 9, the drive shaft 19a of the rotary blade 19 located at the leftmost lateral outer end of the rotary blades 16, 18, and 19 of the slope harvesting device 3 includes: Grounding body 7 having a convex curved surface 77a
7 is attached to the rotary blades 16 and 1 by cutting the soil on the slope by the slope harvesting device 3 by grounding the grounding body 77 to the slope during the mowing operation.
The possibility of damaging 8 and 19 can be avoided regardless of the shape of the inclined surface. Further, the weight of the slope harvesting device 3 can be received by the inclined surface via the grounding body 77, whereby the slope harvesting device 3 is provided.
Since it is possible to suppress the steering handle 9 from being taken by the slope cutting device 3 due to the weight of the slope cutting device, it becomes easier to keep the balance of the ridge mower and the slope cutting device 3
It is even easier to carry out maneuvering operations against the weight of. That is, it is possible to more appropriately suppress the inconvenience that the cutting heights of the slope cutting device 3 become uneven. Moreover, during the mowing work, the grounding body 77 makes the rotary blade 1
Since it rotates in a clockwise direction in a plan view together with 9, the rotation brings the propulsive force against the mowing reaction force received by the mowing device for slope 3 and the mowing device for slope 3 toward the machine body during mowing work. Alternatively, a lifting force can be generated, so that the mowing reaction force can be reduced. That is, since it becomes easier to perform a steering operation against the cutting reaction force received by the slope cutting device 3, the traveling can be stabilized more easily, and a good cutting operation with high cutting height accuracy can be performed. It can be done.

[Other Embodiments] Other embodiments of the present invention will be listed below. As the road surface mowing device 2, a plurality of rotating blades 1
4 may be equipped, or may be configured to perform cutting by relative lateral reciprocal sliding of a pair of upper and lower blades. The slope harvesting device 3 may be arranged on the right lateral side of the traveling vehicle body 1. You may make it equip the 1st mowing part 3A of the mowing apparatus 3 for slopes with the some rotary blade 16 in parallel. The second cutting section 3B of the slope harvesting device 3 may be equipped with one rotary blade 18, or may be equipped with three or more rotary blades 18, 19. The slope harvesting device 3 may be configured such that the pair of upper and lower blades are horizontally reciprocally slid relative to each other to perform the harvesting. The configuration of the steering handle 9 is not limited to that of the above-described embodiment, and the left and right center X1 thereof is deviated from the left and right center X2 of the traveling vehicle body 1 to the opposite side of the slope harvesting device 3. Various modifications are possible as long as they are arranged in. The grounding body 77 may be attached to the rotary blades 16 and 18 other than the rotary blade 19 in the slope harvesting device 3.

[Brief description of drawings]

[Figure 1] Overall side view of the ridge mower

[Fig. 2] Overall plan view of a ridge mower

FIG. 3 is a plan view of the mowing section in a state in which the slope mowing device showing the front wheel support structure and the configuration of each mowing device is set to the maximum mowing width.

FIG. 4 is a plan view of the mowing unit in a state in which the slope mowing device showing the front wheel support structure and the configuration of each mowing device is set to the minimum mowing width.

FIG. 5 is a vertical cross-sectional front view of the mowing unit showing the configuration of each mowing device.

FIG. 6 is a schematic plan view of a ridge mower showing a state in which the front wheel steering angle is adjusted with the slope cutting device set to the maximum cutting width.

FIG. 7 is a schematic plan view of the ridge mower showing a state in which the front wheel steering angle is adjusted with the slope cutting device set to the minimum cutting width.

FIG. 8 is a front view of the mowing section showing a state where the slope mowing device is set in a horizontal posture.

FIG. 9 is a front view of the mowing section showing a state where the slope mowing device is set in an inclined posture.

FIG. 10 is a vertical sectional side view of a slope harvesting device showing a support structure for an auxiliary wheel.

FIG. 11 is a cross-sectional plan view of an essential part showing a support structure for an auxiliary wheel.

FIG. 12 is a side view of an essential part showing a steering angle adjusting structure and a height adjusting structure of a front wheel.

FIG. 13 is a cross-sectional plan view of essential parts showing a front wheel height adjusting structure.

FIG. 14 is a side view of an essential part showing a front wheel height adjusting structure.

FIG. 15 is a vertical sectional front view showing a transmission structure in a mission case.

FIG. 16 is a vertical sectional side view showing the transmission structure in the mission case.

FIG. 17 is a side view of a main portion showing a configuration of an operation lever portion for vertically swinging the slope harvesting device.

FIG. 18 is a plan view of a main portion showing the configuration of an operation lever portion for vertically swinging the slope harvesting device.

FIG. 19 is a side view of a main portion showing the configuration of an operation lever portion for changing the cutting width of the slope cutting device.

FIG. 20 is a schematic side view of a walk-behind mower showing a state of riding on a step portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Traveling machine 2 Road surface mowing device 3 Slope surface mowing device 3A First mowing part 3B Second mowing part 9 Steering handle 16 Rotating blade 18 Rotating blade 19 Rotating blade 19a Driving shaft 77 Grounding body 77a Grounding surface P4 Driving shaft core X1 Left and right center (steering handle) X2 Left and right center (running body)

Front page continuation (72) Inventor Tomohiko Ichikawa 1-chome, Nisshin-cho, Omiya-shi, Saitama 2 Research Institute for the Promotion of Specific Industrial Technology for Biotechnology (72) Inventor Akira Kuromi 64, Ishizukita-machi, Sakai-shi, Osaka Kubota Sakai Works (72) Inventor Shinya Inada 4-15-5, Iyodo, Mihara-machi, Minamikawachi-gun, Osaka Kubota Seiki Co., Ltd. (56) Reference JP-A-8-298837 (JP, A) 51-118437 (JP, U) Actually open 5-51033 (JP, U) Actually open 4-16518 (JP, U) Actually open 60-77329 (JP, U) Actually open 60-85119 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01D 34/86 A01D 34/67 A01D 34/68

Claims (2)

(57) [Claims] 1. A road surface reaping device for cutting grass that grows on a traveling road surface is provided near the left and right center of a walking type traveling vehicle body, and the traveling road surface is provided on one lateral side of the traveling vehicle body. A slope cutting device for cutting grass grown on an inclined surface connected to one side end is provided, and a rotary blade provided adjacent to the road cutting device is provided.
The second mowing part with a rotating blade on the first mowing part
Around the drive shaft core of the rotary blade of the first cutting section.
The first cutting around the drive shaft center so that it can swing rearward
It is possible to switch the holding posture of the second mowing part with respect to the mowing part.
The cutting device for the slope is cut so that
The ridge cutting, which is configured to be changeable, is arranged such that the left and right center of the steering handle extending rearward of the machine body is displaced to the opposite side of the slope cutting device from the left and right center of the traveling machine body. Machine. 2. Located at the outermost lateral end of the slope harvesting device
2. The ridge mower according to claim 1, wherein a grounding body having a grounding surface having a convex curved surface is mounted on the drive shaft of the rotating blade.