JPH11187742A - Mowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mowing machine excellent in handleability, installing a reaping apparatus for load surface in the front of a walking type traveling machine body and connectedly installing a reaping apparatus for slope for reaping grasses grown on inclined surface which lies in a row on one side end of a traveling load surface. SOLUTION: In this mowing machine, a reaping apparatus 3 for slope is constituted of a first reaping part 3A adjacent to a reaping apparatus for load surface and a second reaping part 3B capable of carrying out oscillation variation in longitudinal direction to the first reaping part 3A, and an operating lever 29 for carrying out oscillation control of the second reaping part 3B back and forth is constituted so as to enable an operation lever 29 to operate from a machine body operating position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing device provided in front of a transmission case, a rear wheel mounted on a drive shaft provided at a lower end of the transmission case, and a front wheel provided in front of the mowing device. To a walking-type mower.

[0002]

2. Description of the Related Art A walk-type mower as described above has a front wheel in front of the mowing device and a rear wheel behind the mowing device, so that the load of the mowing device is deposited on the ground. It can be driven in a stable posture. By the way, conventionally, in the above-mentioned walking type mowing machine, the front wheel is configured as a free wheel which functions as a gauge wheel for adjusting the height of the mowing device with respect to the ground.

[0003]

However, for example, when a running path such as an agricultural road on which a walking-type mower is run is divided by an irrigation waterway or the like, first,
One of the front wheel and the rear wheel is lifted and the vehicle is driven by the other wheel alone, and as one of the preceding wheels reaches a traveling path such as a waterway, the other wheel is moved. Touch the ground and lift the other wheel,
By allowing the vehicle to travel with only one preceding wheel, the walk-type mower can be moved across a waterway that divides the traveling path, but in the above-described conventional technology, the front wheels are simply idle wheels. In order to obtain the propulsive force when traveling only with the front wheels, the vehicle is pushed out (forward) or pulled (reverse) while lifting the rear wheels, which are the drive wheels, because they are not driven. Required a lot of effort. In addition, when driving only with the front wheels, which are idle wheels, in a situation where weeds etc. are overgrown on the traveling path or in a situation where the traveling road is rough, make sure to push or pull the aircraft satisfactorily due to the resistance. Can no longer do
There has been an inconvenience in that it is quite difficult for a walking-type mower to cross a waterway that divides a running path.

In order to avoid the above-mentioned inconveniences, it is conceivable that the front wheels are configured as drive wheels in the same manner as the rear wheels. For example, a system different from the transmission system for driving the rear wheels is provided. When a front-wheel drive transmission system is provided from the output shaft of the engine or the input part of the transmission case to the support shaft of the front wheels to form front wheels as drive wheels, the transmission system for front-wheel drive includes a transmission system for rear-wheel drive. Since it is necessary to equip the front-wheel deceleration mechanism that synchronizes the front wheels with the rear wheels by decelerating at the same or substantially the same reduction ratio as the rear-wheel deceleration mechanism installed in the transmission system, it is necessary to provide a larger body and structure. New inconveniences, such as complications. On the other hand, in the case where the transmission system for driving the front wheels is provided from the driving shaft on which the rear wheels, which are the final transmission shafts in the transmission system for driving the rear wheels, to the supporting shaft of the front wheels, and the front wheels are configured as the driving wheels. The rear wheel drive transmission system, which is equipped in the rear wheel drive transmission system, can also be used as the front wheel speed reduction mechanism. However, since the drive shaft for the rear wheels is provided at the lower part of the transmission case, the transmission system for driving the front wheels from the drive shaft to the support shaft of the front wheels is considerably large. It is disposed almost along the ground at a low level, and easily comes into contact with the ground due to the inclination of the body or the unevenness of the ground, so that the transmission system for driving the front wheels is easily damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a walking type mower capable of easily crossing a waterway which divides a running road such as an agricultural road, to increase the size of the fuselage, complicate the structure, or drive the front wheels. An object of the present invention is to enable the configuration while avoiding the disadvantage that the power transmission system is easily damaged.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a mowing device is provided in front of a transmission case, and a drive shaft provided at a lower portion of the transmission case. In a walk-behind mower in which front wheels are provided in front of the mowing device, an input unit and a speed reduction mechanism for traveling are provided on an upper side of the mission case, and the rear wheel is mounted on the transmission case. A power take-off shaft for driving the front wheels is disposed between the speed reduction mechanism and the drive shaft.

According to the first aspect of the present invention, the power take-off shaft for driving the front wheels is arranged between the traveling speed reduction mechanism provided at the upper side of the transmission case and the drive shaft provided at the lower portion of the transmission case. By providing a transmission system for driving the front wheels from the power take-out shaft to the support shaft of the front wheels, the power after deceleration in the reduction mechanism can be transmitted to the front wheels. In addition, the front wheels can also be configured as drive wheels. By this, for example, when the walk-type mower crosses the irrigation waterway or the like that divides the running path such as farm road, so that one of the front and rear wheels is lifted and run only on the other wheel. Also, the driving force of the other wheel can provide a sufficient propulsion force for running the body. In other words, when the front wheels are merely idle wheels, in order to obtain the propulsion force when traveling only with the front wheels, the operation of pushing out the aircraft while lifting the rear wheels (when moving forward) or pulling the aircraft (when moving backward) is performed. Although it becomes necessary and considerable labor is required, in the invention according to claim 1, even if the vehicle is driven only by the front wheels, the front wheels are also configured as the drive wheels similarly to the rear wheels. It is possible to obtain a sufficient propulsion force to drive the aircraft, which eliminates the need to perform operations such as pushing or pulling the aircraft to obtain the propulsion force. It can be considerably reduced. In addition, even if the state of the traveling path when traveling with only one wheel is a state where weeds etc. are overgrown or a state of undulation, by configuring the front wheels and the rear wheels as drive wheels, This allows the aircraft to run easily against overgrown weeds and ups and downs of the running path. In short, the propulsion force for running the body can be sufficiently obtained with either one of the front and rear wheels, so that the walking type mowing machine can divide a running path such as an agricultural road with only effort to lift one wheel. It will be easier to cross waterways.

Further, according to the above configuration, the power after deceleration in the speed reduction mechanism can be transmitted to the front wheels and the rear wheels. In other words, the traveling speed reduction mechanism disposed on the upper side of the transmission case is used for the front wheels. Because it can also be used as a reduction mechanism for the rear wheels, for example, a transmission system for the front wheels from the output shaft of the engine or the input part of the transmission case to the support shaft of the front wheels is different from the transmission system for the rear wheels. There is no need to separately provide a front wheel speed reduction mechanism and a rear wheel speed reduction mechanism as in the case of providing the front wheels as drive wheels. That is, the front wheels as well as the rear wheels can be configured as the drive wheels without causing inconveniences such as an increase in the size of the body and a complicated structure.

In addition, the power take-off shaft for driving the front wheels is disposed higher than the drive shaft for the rear wheels.
As compared with a case where a front wheel drive transmission system is provided from the drive shaft at the lower part of the transmission case, which is the final transmission shaft in the rear wheel drive transmission system, to the front wheel support shaft, and the front wheels are configured as drive wheels, the front wheel drive is performed. The input side (transmission case side) of the transmission system for the vehicle can be positioned at a high position, so that the transmission system for the front wheel drive can be prevented from contacting the ground due to the inclination of the body or unevenness of the ground. . That is, it is possible to prevent the disadvantage that the transmission system for driving the front wheels is damaged by contact with the ground or the like.

Therefore, a walking-type mower that can easily cross a waterway or the like that divides a running path such as an agricultural road,
The configuration can be achieved while avoiding inconveniences such as an increase in the size of the body, a complicated structure, and a possibility that the transmission system for driving the front wheels is easily damaged.

In the invention according to claim 2 of the present invention,
In the first aspect of the present invention, the final transmission shaft of the speed reduction mechanism and the drive shaft are interlocked and connected by a chain, and a sprocket connected to the power take-off shaft is meshed in a winding path of the chain.

According to the second aspect of the present invention, since the final transmission shaft of the speed reduction mechanism and the drive shaft are linked and connected by a chain, the final transmission shaft of the speed reduction mechanism and the drive shaft can be improved by making the chain longer. The distance from the shaft can be increased, and the power take-off shaft to which the input side of the transmission system for driving the front wheels is connected can be disposed at a higher position, so that the transmission system for driving the front wheels can be more effectively used. Can be prevented from contacting the ground or the like due to the inclination of the body or the unevenness of the ground.

Incidentally, when the final transmission shaft and the drive shaft of the speed reduction mechanism are interlockingly connected by gears, to increase the separation distance between the final transmission shaft and the drive shaft of the speed reduction mechanism, the final transmission shaft and the drive shaft must be connected to each other. It is necessary to increase the gears interposed between them, and it is necessary to newly provide a structure for supporting the additional gears. Therefore, as the separation distance between the final transmission shaft and the drive shaft increases, This increases the number of parts and complicates the structure.

Therefore, while simplifying the transmission structure, it is possible to more effectively avoid the disadvantage that the transmission system for driving the front wheels is damaged by contact with the ground or the like.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall side view of a walk-type mower, and FIG. 2 shows an overall plan view of a walk-type mower for two-side mowing. A road cutting device 2 for cutting grass grown on a running road surface is connected to a front portion of the traveling vehicle body 1 and a slope on the left end of the road cutting device 2 is connected to one side end of the running road surface. It is configured for two-sided cutting by connecting a slope cutting device 3 for cutting the grown grass.

As shown in FIG. 1 and FIG.
Are the body frame 4 and the body frame 4 which are substantially L-shaped in side view.
, A transmission case 6 erected behind the body frame 4, and an output shaft 5 of the engine 5.
a, a belt-type transmission mechanism 7 extending over an input shaft 6 a as an input unit disposed on the upper side of the transmission case 6, a rear wheel 8 disposed on the lower left side of the transmission case 6, and an airframe It comprises a steering handle 9 extending rearward from the frame 4. still,
A front wheel 10 is provided in front of the road surface reaper 2,
The road reaper 2 can be run in a stable posture in which the load of the reaper 2 is deposited on the ground. In addition, an auxiliary wheel 11 is provided in front of the slope reaper 3 so that the load of the slope reaper 3 can be left in the ground and run in a stable posture. Steering handle 9
Is a left-right connecting fulcrum P at the rear upper end of the body frame 4.
It is swingably connected to the circumference of the work 1 so that the height position of the extension end can be changed to a height position according to the height of the worker by a swing operation in the vertical direction, thereby improving workability. By changing to the forward position by swinging forward, the overall length of the fuselage can be shortened to about half of that in use, which is advantageous in terms of transportation and storage. ing. In addition, the steering handle 9
Is configured so that it can be fixed to the body frame 4 by tightening the bolts 12 with knobs, so that the height adjustment operation and the posture change operation can be easily performed without using a tool.

As shown in FIGS.
Is a housing 13 extending in a horizontal posture from the front of the body frame 4 to the front, and a single rotating blade 14 rotatably mounted in the housing 13 around a vertically oriented drive shaft center P2. It is constituted by such as. The housing 13 includes a sheet metal top plate 13A fixed to a front portion of the 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. I have. The slope reaper 3 is provided with a housing 15 connected to the left end of the road reaper 2 so as to be able to swing up and down around a front-rear axis P3, and is rotatably mounted in the housing 15 about a drive axis P4. A first cutting portion 3A made up of a single rotating blade 16 and a housing 17 connected to the drive shaft center P4 of the first cutting portion 3A so as to be able to swing back and forth, and are juxtaposed in the housing 17. And a second reaping unit 3B including two rotating blades 18 and 19 rotatably mounted around the drive shaft cores P5 and P6. First reaper 3A
Is constituted by a top plate 15A made of sheet metal. The housing 17 of the second cutting unit 3B forms a left wall and a rear wall in a state where the top plate 17A made of sheet metal and the second cutting unit 3B are located on the left side of the first cutting unit 3A. And a rubber plate 17B connected to the top plate 17A. That is, the slope reaper 3 is connected to the left end of the road reaper 2 so as to be able to swing up and down around the longitudinal axis P3. 3 can be changed to a posture along the work surface on which the mowing operation is performed. In addition, the slope reaping device 3 is configured such that the second reaping unit 3
B is configured to be able to swing back and forth around the drive shaft center P4, and by the swinging operation of the second cutting unit 3B back and forth.
The cutting width can be changed to a length corresponding to the length of the work surface on which the slope cutting device 3 performs the cutting operation.

The range of swinging of the second reaping unit 3B in the front-rear direction is determined from the position immediately to the left of the first reaping unit 3A, which is aligned with the first reaping unit 3A in the left-right direction of the machine. The first reaping unit 3A is set in a range immediately after the first reaping unit 3A, which is aligned with the one reaping unit 3A along the front-rear direction of the machine, and the second reaping unit 3B is directly connected to the first reaping unit 3A. The cutting width of the slope reaper 3 can be maximized by being located on the left side, and the slope reaper 3 can be maximized by arranging the second reaper 3B immediately behind the first reaper 3A. The cutting width can be minimized. The maximum cutting width length of the slope cutting device 3 is a length obtained by adding the maximum cutting width length of the second cutting unit 3B to the cutting width length of the first cutting unit 3A. The minimum cutting width of the slope cutting device 3 is only the cutting width of the first cutting unit 3A.

As shown in FIGS.
The rotating blade 14 and the rotating blades 16, 18, 19 of the slope cutting device 3 are arranged close to each other so that adjacent ones are in a state where a part of the cutting area (rotation locus) of each other overlaps. Each is set to rotate at a rotation phase that can avoid contact between adjacent objects. When the cutting width of the slope cutting device 3 is changed as described above, the second cutting portion 3B is swung back and forth around the drive shaft center 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 maintained constant regardless of the cutting width of the slope cutting device 3. That is, at the time of the cutting operation, regardless of the change of the cutting width of the slope cutting device 3, the first cutting portion 3A between the road surface cutting device 2 and the slope cutting device 3 and the first cutting portion 3A in the slope cutting device 3 are connected. Two reaping unit 3B
And the rotating blades 18 of the second reaping unit 3B,
The configuration is such that inconveniences such as the occurrence of uncut between 19 and the contact between adjacent ones of the rotating blades 14, 16, 18, and 19 can be avoided.

As shown in FIGS.
And the first cutting unit 3A of the slope cutting device 3 is provided with drive shafts 14a, 16 of the rotating blades 14, 16 mounted respectively.
a are linked by the first transmission mechanism 20. The first transmission mechanism 20 includes a drive shaft 1 of the road surface reaper 2.
4A, a bevel gear type first gear transmission portion 20A, which is communicatively connected to the first mowing portion 3A, and a bevel gear type second gear transmission portion 20B, which is communicatively connected to the drive shaft 16a of the first reaper 3A. A road surface around the front-rear shaft core P3 is configured by a shaft transmission portion 20C and a universal joint 20D that connects the respective gear transmission portions 20A and 20B to the shaft transmission portion 20C so as to be able to transmit the same. The up and down swing of the slope reaping device 3 with respect to the reaping device 2 is allowed. The drive shafts 18a and 19a of the rotating blades 18 and 19 mounted on the second reaping unit 3B of the slope reaper 3 are linked to the end of the first power transmission mechanism 20 on the side of the slope reaper 3. The connected second transmission mechanism 21 is connected so as to be able to transmit. The second transmission mechanism 21 is a bevel gear type first gear transmission section 21A that is communicatively connected to the second gear transmission section 20B of the first transmission mechanism 20, and a rotating blade 18 on the side adjacent to the first reaping section 3A. Drive shaft 18a
Bevel gear type second gear transmission portion 21B, which is communicatively connected to the first bevel gear type, and a bevel gear type third gear transmission portion 21C, which is communicatively connected to the drive shaft 19a of the rotary blade 19 on the side away from the first mowing portion 3A. , And a shaft transmission portion 21D that connects the respective gear transmission portions 21A, 21B, and 21C so as to be able to transmit the same.
It is configured to be able to swing integrally back and forth around. The first gear transmission 20A of the first transmission mechanism 20 is provided with an input shaft 20a, and a belt tension type reaping clutch 22 is bridged between the input shaft 20a and the output shaft 5a of the engine 5. .

That is, in the road surface reaping device 2, the rotary blades 14 are driven by the power transmitted from the engine 5 through the reaping clutch 22 and the first transmission mechanism 20. Further, the slope reaping device 3 changes the posture by swinging up and down around the longitudinal axis P3, and
Regardless of the change in the cutting width due to the forward and backward swinging of the second cutting unit 3B around the drive shaft center P4, the engine 5 transmitted via the cutting clutch 22, the first transmission mechanism 20, and the second transmission mechanism 21. The rotating blades 16, 18, and 19 are driven by the power.

As shown in FIGS. 1 to 5, 17 and 18, the slope reaper 3 is provided with a first operating lever erected on a left handle bar 9 A of the steering handle 9 so as to be able to swing back and forth. 23, an operation arm 24 supported to be able to swing left and right by a 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 a One reaper 3A
Are linked via an operation rod 26 extending over a second gear transmission portion 20B of the first transmission mechanism 20 fixed to the housing 15. The first operation lever 23 can be held at a desired operation position by engaging with a guide plate 27 mounted on the left handlebar 9A. That is, by the swinging operation of the first operating lever 23 to the rear side against the own weight of the slope reaper 3, the slope reaper 3 can be lifted and oscillated around the longitudinal axis P3. By the swinging operation of the first operation lever 23 to the front side, the slope cutting device 3 can be swung down around the longitudinal axis P3 by its own weight. In addition, by engaging the first operation lever 23 with the guide plate 27 at a desired operation position, the slope reaper 3 can be moved in the longitudinal axis P
It can be held in a desired posture around 3.
In addition, an assist gas cylinder 28 for reducing the operating force when the slope operating device 3 is raised and rocked by the first operating lever 23 is installed from the housing 13 of the road surface harvesting device 2 to the operating arm 24. The operation of the gas cylinder 28 allows the first operation lever 23 to perform the upward swinging operation of the slope cutting device 3 with a light operation.

As shown in FIGS. 1 to 5 and FIG. 19, the second cutting unit 3B of the slope cutting device 3 swings back and forth integrally with the second cutting unit 3B around the drive shaft center P4 of the first cutting unit 3A. The moving second transmission mechanism 21 is linked via a push-pull wire 30 to a second operation lever 29 erected on the right handle bar 9B of the operation handle 9 so as to be able to swing back and forth. In other words, the second cutting lever 3B is moved back and forth by the second operating lever 29 to move the second cutting unit 3B to the drive shaft center P4 of the first cutting unit 3A.
It can swing back and forth around, so that the cutting width of the slope cutting device 3 can be changed. The second operation lever 29 is swingably supported by a shaft transmission portion 21D of the second transmission mechanism 21 with respect to a fan-shaped engaged plate 31 fixed to the second gear transmission portion 20B of the first transmission mechanism 20. An operation rod 33 for releasing the engagement of the engagement arm 32 is fitted inside. 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 able to swing back and forth. Release wire 3
5 are linked. The operating rod 33 is biased by a tension spring 36 extending from the second operating lever 29 to the crank arm 34 so as to protrude from above the second operating lever 29. The engagement arm 32 is urged by a helical spring 37 to engage with the engaged plate 31. That is, by pushing the operating rod 33 against the tension spring 36 and the helical spring 37, the engagement of the engagement arm 32 with the engaged plate 31 can be released. The operation of swinging the second reaping unit 3B forward and backward by the operation lever 29 can be performed. 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 helical spring 37, so that the second reaping portion 3B is driven by the drive shaft center. It can be held in a desired posture around P4.

As shown in FIGS. 1 and 17, the cutting clutch 22 is linked via a release wire 39 to a cutting clutch lever 38, which is mounted on the left handlebar 9A of the steering handle 9 so as to be able to swing up and down. And
It is of a deadman type that can be switched to the transmission state by an upward swinging operation of the reaping clutch lever 38 by gripping the left handle bar 9A and the reaping clutch lever 38 together.

As shown in FIGS. 2 to 4, 6 and 7,
At the rear end of the first cutting unit 3A in the slope cutting device 3,
A rear wall body 40 for preventing the cut grass and the like cut by the first cutting unit 3A from scattering to the rear is provided. Rear wall 4
Numeral 0 designates a rubber plate 40A forming a rear wall portion and a support member 40B supporting the rubber plate 40A, and a housing 13 serving as a fulcrum on the side of the road surface reaping device 2 Is connected so as to be able to swing back and forth around a vertical axis P7 set at the left rear end portion of the and to be able to swing up and down around a horizontal axis P8.
Via a link 41. The horizontal axis core P8 is
When the second reaping unit 3B of the slope reaping device 3 is located at the position immediately to the left of the first reaping unit 3A, the second reaping unit 3B is located on an extension of the front-rear axis P3. That is, the rear wall body 40
Swings back and forth around the longitudinal axis P7 in conjunction with the longitudinal swing operation of the second reaping unit 3B around the drive shaft center P4,
It is configured to swing up and down around the horizontal axis P8 in conjunction with the vertical swing operation of the slope reaping device 3 around the front and rear axis P3. Part 3
Regardless of the change in the cutting width of the slope cutting device 3 that swings back and forth around the drive shaft center P4 of A, and the change in the posture of the slope cutting device 3 around the front and rear shaft center P3, the first cutting portion 3A. While being able to prevent the scattering of cut grass and the like from the rear, it is provided at the rear end of the first cutting unit 3A,
This prevents an obstacle when changing the cutting width of the slope cutting device 3 that swings the second cutting unit 3B back and forth around the drive shaft center P4 of the first cutting unit 3A.

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 shaft center P4 of the first cutting portion 3A is changed. Since the housing 15 of the first reaping unit 3A and the housing 17 of the second reaping unit 3B may be separated from each other in accordance with the operation to form a gap, the cover 42 for filling the gap is provided with the second reaping. First cutting section 3A in housing 17 of section 3B
It extends from the end on the side toward the first reaping unit 3A.
In other words, the cover 42 is provided at the end of the housing 17 of the second reaping unit 3B on the side of the first reaping unit 3A, so that during the reaping operation, the cutting width of the sloping reaper 3 is changed so that the slope reaping device 3 is removed. The cut grass can be prevented from scattering from a gap formed between the housings 15 and 17. In addition, the housing 1 of the first reaping unit 3A
5, a pressing plate 43 for preventing the cover 42 from rising from the upper surface of the first cutting unit 3A is provided on an upper surface portion on the second cutting unit 3B side. The cut grass can be prevented 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 is configured such that the free end of the second cutting portion 3B is in the minimum cutting width state in which the free end of the second cutting portion 3B is located at the rearmost position. Is rear wheel 8
Is located near the rear end, and the front side of the body can be largely levitated with the support shaft 8a of the rear wheel 8 as a fulcrum. That is, for example, when it becomes necessary to move over the stepped portion while traveling with the left and right widths of the aircraft minimized by positioning the free end of the second reaping unit 3B at the rearmost position, In the case where the free end is set to be located rearward from the rear end of the rear wheel 8, even if the front side of the body is lifted with the axle 8a of the rear wheel 8 as a fulcrum, the second reaping portion 3B Since the front end side of the fuselage cannot be levitated greatly due to the free end coming into contact with the road surface, there is a disadvantage that it is not possible to easily climb over the stepped portion. Since the free end of the mowing part 3B is set near the rear end of the rear wheel 8, as shown in FIG. 20, the front side of the body is set with the support shaft 8a of the rear wheel 8 as a fulcrum. Can levitate greatly and easily climb over steps So that the can be.

As shown in FIGS. 6 and 7, the road cutting device 2 is configured such that the rotating blade 14 rotates counterclockwise in plan view. The slope cutting device 3 is configured such that the rotating blade 18 of the second cutting unit 3B on the side of the first cutting unit 3A rotates counterclockwise in plan view, and the other rotary blades 16 and 19 rotate clockwise in plan view. Have been. With this configuration, the rotating blade 14 of the road cutting device 2 and the rotating blade 16 of the first cutting portion 3A of the slope cutting device 3 are used.
The cut grass can be guided between the rotating blades 14 and 16 by the action of the rotating blades 14 and 16, and can be smoothly discharged backward from between the rotating blades 14 and 16, , Each rotating blade 18, 19 of the second cutting unit 3 </ b> B in the slope cutting device 3.
The cut grass can be guided between the rotating blades 18 and 19 by the action of the rotating blades 18 and 19 and can be smoothly discharged rearward from between the rotating blades 18 and 19. Has become.
That is, when the rotating blade 14 of the road surface reaping device 2 is configured to rotate clockwise in a plan view, the cut grass cut by the rotating blade 14 is removed by the housing 13 and the rotating blade 14 of the road surface reaping device 2. And the rotation blade 19 on the free end side of the second cutting part 3B of the slope cutting device 3 is rotated counterclockwise in a plan view. This causes inconvenience that the cut grass that has been cut by the rotating blade 19 accumulates between the housing 17 of the second cutting unit 3B and the rotating blade 19 and hinders cutting and running. Blade 14,1
6, 18 and 19 are configured to rotate in the same direction, resulting in their rotating blades 14, 16, 18, 19
Thus, it is possible to avoid inconveniences such as the cut grass that is cut off and accumulated without being discharged from between them, which hinders cutting and running, and is excellent in cutting performance and running performance.

As shown in FIGS. 2, 6, and 7, the rear wheel 8 is mounted on a drive shaft 8a extending leftward and outward from a lower portion of the transmission case 6, which is a support shaft 8a. It is constituted by a pair of rubber tires 8A, and is driven by the power from the engine 5 transmitted via the transmission case 6. As shown in FIGS. 15 and 16, on the upper side of the transmission case 6,
A traveling speed reduction mechanism A communicably connected to the input shaft 6a is provided. The speed reduction mechanism A includes a speed change unit Aa capable of switching the power from the engine 5 between high and low to reduce the speed.
And a clutch Ab for intermittently transmitting power from the engine 5 to the rear wheel 8. Specifically, the speed reduction mechanism A
Is a first high-speed gear 44 and a first low-speed gear 45 externally fitted to the input shaft 6a so as to be relatively rotatable, a second high-speed gear 46 meshing with the first high-speed gear 44, and a second high-speed gear 46 meshing with the first low-speed gear 45. A low-speed gear 47, a transmission shaft 48 provided below the input shaft 6a to support the second high-speed gear 46 and the second low-speed gear 47 so as to be rotatable integrally, and a first relay gear 48a formed integrally with the transmission shaft 48. A second relay gear 49 externally fitted to the input shaft 6a so as to be rotatable relative to the input shaft 6a, externally fitted to the input shaft 6a so as to be rotatable and slidable, and to the second relay gear 49 by a sliding operation. Integrally formed engaging claw 49
a shift gear 50 having a meshing claw 50a meshable with
And a final gear 51 which is rotatably fitted to the transmission shaft 48 in a state of meshing with the shift gear 50. Of these, the first high-speed gear 44, the first low-speed gear 45, and the second high-speed gear The transmission 46 includes the gear 46 and the second low-speed gear 47. Further, the clutch portion A is formed by the second relay gear 49 and the shift gear 50.
b. An output sprocket 52 is attached to the final gear 51 of the speed reduction mechanism A so as to be rotatable integrally.
From the output sprocket 52, an input sprocket 53 that is integrally rotatably mounted on a drive shaft 8a for driving the rear wheel 8.
The chain 54 is wound over the entirety. That is,
With the above-described configuration, the power from the engine 5 is transmitted to the rear wheel 8 so that the power can be intermittently switched and the height can be switched between two levels.

As shown in FIG. 1, FIG. 2 and FIG. 15, the switching operation of the transmission portion Aa is performed by swinging a transmission lever 55 extending rearward from the upper left side of the transmission case 6 backward. Thereby, the shift shaft 56 with the key 56a slidably fitted on the input shaft 6a is slid, and the key 56a is selectively engaged with the first high-speed gear 44 or the first low-speed gear 45. It can be done by doing. As shown in FIGS. 1 and 16, the switching operation of the clutch Ab is performed by connecting the shift gear 50 via the shift fork 57 and the release wire 58 to the right handlebar 9B of the steering handle 9.
Running clutch lever 5 equipped to be able to swing up and down
A spring (not shown) for operating the shift fork 57 in the transmission cutting direction by gripping the shift fork 57 with the right handle rod 9B.
The deadman system is configured to switch to the transmission state by swinging upward against the urging of the above.

As shown in FIGS. 1 to 4, 15 and 16, the front wheel 10 is provided with a power take-out shaft disposed between the speed reduction mechanism A in the transmission case 6 and the drive shaft 8 a for driving the rear wheel 8. 6b, a first chain-type transmission mechanism 61 extending from the power take-out shaft 6b to the relay shaft 60 disposed at the front of the housing 13 in the road mowing device 2, and a second chain-type transmission mechanism 61 extending from the relay shaft 60 to the support shaft 10a of the front wheel 10. Two chain transmission mechanism 62
And so that they can be transmitted. Power take-out shaft 6b
The transmission shaft 48 which is the final transmission shaft in the speed reduction mechanism A
A sprocket 6c meshing with the chain 54 wound around the output sprocket 52 mounted on the drive shaft 8a and the input sprocket 53 mounted on the drive shaft 8a is integrally rotatably connected to the chain 54. That is, the front wheels 10 are driven by the power from the engine 5 transmitted via the belt-type transmission mechanism 7, the transmission case 6, the first chain-type transmission mechanism 61, and the second chain-type transmission mechanism 62. Has become. Also,
By disposing the power take-out shaft 6b for driving the front wheel 10 higher than the drive shaft 8a for driving the rear wheel 8, the front wheel 1
The transmission system for zero drive can be prevented from being damaged by contacting the ground or the like due to the inclination of the body or the unevenness of the ground.

As shown in FIGS. 1 to 4 and FIGS. 12 to 14, the second chain type transmission mechanism 62 includes a
The front wheel 10 is mounted on a pair of left and right support brackets 63 erected on the housing 13 so as to be swingable up and down and extends forward, and the front wheel 10 is attached to the extended end thereof. I have. That is, the second chain type transmission mechanism 62
The vertical position of the front wheel 10 with respect to the road surface reaping device 2 can be changed by the vertical swing operation, and the cutting height of the road surface reaping device 2 can be changed. The second chain-type transmission mechanism 62 expands a plurality of (five in this embodiment, as shown in FIG. 14) the left support bracket 63 by tightening a bolt 64 with a knob having an enlarged diameter portion 64a. A long hole 6 formed to have a diameter portion 65a
5 can be fixed to a desired swinging posture without using a tool by engaging with any of the enlarged diameter portions 65a, whereby the cutting height changing operation of the road surface cutting device 2 can be performed. It can be done easily.

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 It is possible to change the height position with respect to the slope cutting device 3 in front of the first cutting portion 3A in the slope cutting device 3 via a support rod 67 extending from the support arm 66 so as to be vertically swingable. It is arranged to become. That is, since the auxiliary wheel 11 is disposed in front of the first cutting unit 3A, the auxiliary wheel 11 can be cut by the slope cutting device 3 even when the slope cutting device 3 is set to the minimum cutting width. Since it can be located within the width, even if it is a narrow work place that needs to be steered with the slope cutting device 3 set to the minimum cutting width, it can enter the work place, Even in a work place, it is possible to steer in a stable posture in which the load of the slope reaper 3 is deposited on the ground, thereby improving the stability during running and the workability. Also, by changing the height position of the auxiliary wheel 11 with respect to the slope cutting device 3, the cutting height of the slope cutting device 3 can be changed. At the rear end of the support rod 67, a plurality (in this embodiment, FIG.
(See FIG. 5), a connection plate 68 having five connection holes 68a formed therein is mounted.
By inserting the connecting pin 66a mounted on the support arm 66 into any one of the support arms 8a, the support arm 66 can be fixed to 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 to 11, the supporting rod 67 is supported by a connecting plate 68 so as to be rotatable around its axis P9, and an operation arm fixed to a rear portion thereof. 67a is the housing 13 of the road surface reaping device 2.
The swing arm 70 is pivotally connected to a free end of a swing arm 70 that is swingably connected to a fixed plate 69 erected on the front side around the front-rear axis P10. From this configuration, the auxiliary wheel 1 attached to the support rod 67
Numeral 1 rotates around the axis P9 of the support rod 67 in conjunction with the vertical swing operation around the longitudinal axis P3 of the slope reaper 3. The attitude with respect to the reaper 3 is changed to be maintained in a substantially vertical attitude. In other words, the auxiliary wheel 11 is maintained in a substantially vertical position regardless of the inclination angle of the slope reaper 3, thereby making it easier to receive the load of the slope reaper 3 and thereby the load applied to the auxiliary wheel 11. As a result, the biting force on the inclined surface obtained is increased, so that side slip on the inclined surface is less likely to occur. As shown in FIGS. 8 and 9, the connection position of the swing arm 70 with respect to the fixing plate 69 of the road surface reaper 2 can be changed, and the posture of the auxiliary wheel 11 is changed by changing the connection position. Can be changed.

[Other Embodiments] Other embodiments of the present invention will be listed below. Various modifications can be made to the configuration of the mowing devices 2 and 3 provided in the walking-type mower. For example, it may be configured to be equipped with only the road surface reaper 2,
You may comprise so that cutting may be performed by the relative horizontal reciprocation sliding of a pair of upper and lower blade bodies. The speed reduction mechanism A includes a transmission section Aa and a clutch section Ab.
It may be of a configuration not equipped with. The final transmission shaft 48, the drive shaft 8a, and the power take-out shaft 6b of the speed reduction mechanism A may be linked to each other by a gear or a belt.

[Brief description of the drawings]

FIG. 1 is an overall side view of a walking-type mower.

FIG. 2 is an overall plan view of a walking type mower.

FIG. 3 is a plan view of a cutting unit in a state where a slope cutting device is set to a maximum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 4 is a plan view of a cutting unit in a state where a slope cutting device is set to a minimum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 5 is a longitudinal sectional front view showing the configuration of each reaper.

FIG. 6 is a schematic plan view of the walking type mower showing the arrangement of the front wheels and the auxiliary wheels and the state where the cutting device for the slope has been set to the maximum cutting width.

FIG. 7 is a schematic plan view of a walking-type mower showing the arrangement of front wheels and auxiliary wheels, and a state in which a slope cutting device is set to a minimum cutting width.

FIG. 8 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in a horizontal posture.

FIG. 9 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in an inclined posture.

FIG. 10 is a longitudinal sectional side view of a slope cutting device showing a support structure of an auxiliary wheel.

FIG. 11 is a longitudinal sectional plan view of a main part showing a support structure of an auxiliary wheel.

FIG. 12 is a side view of a main part showing a support structure for a front wheel.

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

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

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

FIG. 16 is a longitudinal sectional side view showing a transmission structure in a transmission case.

FIG. 17 is a side view of a main part showing a configuration of an operation lever unit for vertically swinging the slope reaper.

FIG. 18 is a plan view of a main part showing a configuration of an operation lever unit that vertically swings and operates the slope cutting device.

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

FIG. 20 is a schematic side view of the walk-behind mower, showing a state where the mower has climbed on a step;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling body 2 road surface mowing device 3 slope mowing device 3A first mowing portion 3B second mowing portion 29 operating lever

[Procedure amendment]

[Submission date] March 31, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Mower

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
At one end of a road cutting device for cutting grass, the running path
Slope for cutting grass growing on the slope connected to one end of the surface
The present invention relates to a mowing machine having a continuous mowing device connected thereto.

[0002]

2. Description of the Related Art Conventionally, a two-side mowing mower as described above is used.
For example, Japanese Unexamined Utility Model Publication No. 61-95229 discloses
For slopes equipped with two rotating blades as shown
The front upper end of the reaper is attached to one end of the road reaper.
It is connected to swing back and forth and after the slope mowing device.
Turnbuckle length between upper edge and one side of traveling vehicle
Connected through an adjustment mechanism, and by operating the length adjustment mechanism,
Separation between the rear upper end of the slope mowing device and one side of the traveling machine
Change the distance and replace the slope reaper with one of the road reapers.
Swing back and forth (posture change) around the connection fulcrum with the side end
By changing the cutting width of the slope reaper,
There was something to do.

[0003]

In the above conventional example, in order to change the cutting width of the slope cutting device , it is necessary to stop the body and operate the turnbuckle-type length adjusting mechanism . The operation becomes cumbersome,
It was not possible to make adjustments while harvesting.

An object of the present invention is to provide a cutting width of a slope cutting device.
Can be easily changed and on the slope
It is easy to avoid obstacles and perform continuous mowing.
It is to provide a mowing machine that can be used.

[0005]

According to the first aspect of the present invention, there is provided:
The mower grows on the road surface in front of the walking type
Equipped with a road mowing device to cut grass
One side edge of the traveling road surface at one side edge of the road surface reaper
Slope mowing equipment for mowing grass growing on the slope
A mower connected in a vertically swingable manner, wherein the slope
A first cutting device adjacent to the road surface cutting device.
Part, and can be displaced in the front-rear direction with respect to the first mowing part.
And a second reaping unit, which swings back and forth.
Operation lever for adjustment can be operated from the aircraft control position
It is characterized by being constituted.

According to the above construction, the second reaping unit is swung back and forth.
By moving, the cutting width of the slope reaper can be changed and adjusted.
Slope cutting for various slopes with different widths in the slope direction
The two-sided mowing operation can be performed efficiently with the narrow width. I
An operation in which the second mowing part of the mowing device for slopes is located at hand
The swing can be adjusted by the operation lever so that
You can change and adjust the slope cut width, for example, standing trees or large stones.
Work on a slope with obstacles such as
Work can be done continuously while avoiding objects.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall side view of a walk-type mower, and FIG. 2 shows an overall plan view of a walk-type mower for two-side mowing. A road cutting device 2 for cutting grass grown on a running road surface is connected to a front portion of the traveling vehicle body 1 and a slope on the left end of the road cutting device 2 is connected to one side end of the running road surface. It is configured for two-sided cutting by connecting a slope cutting device 3 for cutting the grown grass.

As shown in FIG. 1 and FIG.
Are the body frame 4 and the body frame 4 which are substantially L-shaped in side view.
, A transmission case 6 erected behind the body frame 4, and an output shaft 5 of the engine 5.
a, a belt-type transmission mechanism 7 extending over an input shaft 6 a as an input unit disposed on the upper side of the transmission case 6, a rear wheel 8 disposed on the lower left side of the transmission case 6, and an airframe It comprises a steering handle 9 extending rearward from the frame 4. still,
A front wheel 10 is provided in front of the road surface reaper 2,
The road reaper 2 can be run in a stable posture in which the load of the reaper 2 is deposited on the ground. In addition, an auxiliary wheel 11 is provided in front of the slope reaper 3 so that the load of the slope reaper 3 can be left in the ground and run in a stable posture. Steering handle 9
Is a left-right connecting fulcrum P at the rear upper end of the body frame 4.
It is swingably connected to the circumference of the work 1 so that the height position of the extension end can be changed to a height position according to the height of the worker by a swing operation in the vertical direction, thereby improving workability. By changing to the forward position by swinging forward, the overall length of the fuselage can be shortened to about half of that in use, which is advantageous in terms of transportation and storage. ing. In addition, the steering handle 9
Is configured so that it can be fixed to the body frame 4 by tightening the bolts 12 with knobs, so that the height adjustment operation and the posture change operation can be easily performed without using a tool.

[0010] As shown in FIGS.
Is a housing 13 extending in a horizontal posture from the front of the body frame 4 to the front, and a single rotating blade 14 rotatably mounted in the housing 13 around a vertically oriented drive shaft center P2. It is constituted by such as. The housing 13 includes a sheet metal top plate 13A fixed to a front portion of the 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. I have. The slope reaper 3 is provided with a housing 15 connected to the left end of the road reaper 2 so as to be able to swing up and down around a front-rear axis P3, and is rotatably mounted in the housing 15 about a drive axis P4. A first cutting portion 3A made up of a single rotating blade 16 and a housing 17 connected to the drive shaft center P4 of the first cutting portion 3A so as to be able to swing back and forth, and are juxtaposed in the housing 17. And a second reaping unit 3B including two rotating blades 18 and 19 rotatably mounted around the drive shaft cores P5 and P6. First reaper 3A
Is constituted by a top plate 15A made of sheet metal. The housing 17 of the second cutting unit 3B forms a left wall and a rear wall in a state where the top plate 17A made of sheet metal and the second cutting unit 3B are located on the left side of the first cutting unit 3A. And a rubber plate 17B connected to the top plate 17A. That is, the slope reaper 3 is connected to the left end of the road reaper 2 so as to be able to swing up and down around the longitudinal axis P3. 3 can be changed to a posture along the work surface on which the mowing operation is performed. In addition, the slope reaping device 3 is configured such that the second reaping unit 3
B is configured to be able to swing back and forth around the drive shaft center P4, and by the swinging operation of the second cutting unit 3B back and forth.
The cutting width can be changed to a length corresponding to the length of the work surface on which the slope cutting device 3 performs the cutting operation.

The range of swinging of the second reaping unit 3B in the front-rear direction is from the position immediately to the left of the first reaping unit 3A, which is aligned with the first reaping unit 3A in the left-right direction of the machine. The first reaping unit 3A is set in a range immediately after the first reaping unit 3A, which is aligned with the one reaping unit 3A along the front-rear direction of the machine, and the second reaping unit 3B is directly connected to the first reaping unit 3A. The cutting width of the slope reaper 3 can be maximized by being located on the left side, and the slope reaper 3 can be maximized by arranging the second reaper 3B immediately behind the first reaper 3A. The cutting width can be minimized. The maximum cutting width length of the slope cutting device 3 is a length obtained by adding the maximum cutting width length of the second cutting unit 3B to the cutting width length of the first cutting unit 3A. The minimum cutting width of the slope cutting device 3 is only the cutting width of the first cutting unit 3A.

As shown in FIGS.
The rotating blade 14 and the rotating blades 16, 18, 19 of the slope cutting device 3 are arranged close to each other so that adjacent ones are in a state where a part of the cutting area (rotation locus) of each other overlaps. Each is set to rotate at a rotation phase that can avoid contact between adjacent objects. When the cutting width of the slope cutting device 3 is changed as described above, the second cutting portion 3B is swung back and forth around the drive shaft center 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 maintained constant regardless of the cutting width of the slope cutting device 3. That is, at the time of the cutting operation, regardless of the change of the cutting width of the slope cutting device 3, the first cutting portion 3A between the road surface cutting device 2 and the slope cutting device 3 and the first cutting portion 3A of the slope cutting device 3 are connected. Two reaping unit 3B
And the rotating blades 18 of the second reaping unit 3B,
The configuration is such that inconveniences such as the occurrence of uncut between 19 and the contact between adjacent ones of the rotating blades 14, 16, 18, and 19 can be avoided.

As shown in FIGS.
And the first cutting unit 3A of the slope cutting device 3 is provided with drive shafts 14a, 16 of the rotating blades 14, 16 mounted respectively.
a are linked by the first transmission mechanism 20. The first transmission mechanism 20 includes a drive shaft 1 of the road surface reaper 2.
4A, a bevel gear type first gear transmission portion 20A, which is communicatively connected to the first mowing portion 3A, and a bevel gear type second gear transmission portion 20B, which is communicatively connected to the drive shaft 16a of the first reaper 3A. A road surface around the front-rear shaft core P3 is configured by a shaft transmission portion 20C and a universal joint 20D that connects the respective gear transmission portions 20A and 20B to the shaft transmission portion 20C so as to be able to transmit the same. The up and down swing of the slope reaping device 3 with respect to the reaping device 2 is allowed. The drive shafts 18a and 19a of the rotating blades 18 and 19 mounted on the second reaping unit 3B of the slope reaper 3 are linked to the end of the first power transmission mechanism 20 on the side of the slope reaper 3. The connected second transmission mechanism 21 is connected so as to be able to transmit. The second transmission mechanism 21 is a bevel gear type first gear transmission section 21A that is communicatively connected to the second gear transmission section 20B of the first transmission mechanism 20, and a rotating blade 18 on the side adjacent to the first reaping section 3A. Drive shaft 18a
Bevel gear type second gear transmission portion 21B, which is communicatively connected to the first bevel gear type, and a bevel gear type third gear transmission portion 21C, which is communicatively connected to the drive shaft 19a of the rotary blade 19 on the side away from the first mowing portion 3A. , And a shaft transmission portion 21D that connects the respective gear transmission portions 21A, 21B, and 21C so as to be able to transmit the same.
It is configured to be able to swing integrally back and forth around. The first gear transmission 20A of the first transmission mechanism 20 is provided with an input shaft 20a, and a belt tension type reaping clutch 22 is bridged between the input shaft 20a and the output shaft 5a of the engine 5. .

That is, in the road surface reaping device 2, the rotary blades 14 are driven by the power transmitted from the engine 5 via the reaping clutch 22 and the first transmission mechanism 20. Further, the slope reaping device 3 changes the posture by swinging up and down around the longitudinal axis P3, and
Regardless of the change in the cutting width due to the forward and backward swinging of the second cutting unit 3B around the drive shaft center P4, the engine 5 transmitted via the cutting clutch 22, the first transmission mechanism 20, and the second transmission mechanism 21. The rotating blades 16, 18, and 19 are driven by the power.

As shown in FIGS. 1 to 5, 17 and 18, the slope cutting device 3 includes a first operating lever erected on a left handle bar 9 A of the steering handle 9 so as to be able to swing back and forth. 23, an operation arm 24 supported to be able to swing left and right by a 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 a One reaper 3A
Are linked via an operation rod 26 extending over a second gear transmission portion 20B of the first transmission mechanism 20 fixed to the housing 15. The first operation lever 23 can be held at a desired operation position by engaging with a guide plate 27 mounted on the left handlebar 9A. That is, by the swinging operation of the first operating lever 23 to the rear side against the own weight of the slope reaper 3, the slope reaper 3 can be lifted and oscillated around the longitudinal axis P3. By the swinging operation of the first operation lever 23 to the front side, the slope cutting device 3 can be swung down around the longitudinal axis P3 by its own weight. In addition, by engaging the first operation lever 23 with the guide plate 27 at a desired operation position, the slope reaper 3 can be moved in the longitudinal axis P
It can be held in a desired posture around 3.
In addition, an assist gas cylinder 28 for reducing the operating force when the slope operating device 3 is raised and rocked by the first operating lever 23 is installed from the housing 13 of the road surface harvesting device 2 to the operating arm 24. The operation of the gas cylinder 28 allows the first operation lever 23 to perform the upward swinging operation of the slope cutting device 3 with a light operation.

As shown in FIGS. 1 to 5 and FIG. 19, the second cutting unit 3B of the slope cutting device 3 swings back and forth integrally with the second cutting unit 3B around the drive shaft center P4 of the first cutting unit 3A. The moving second transmission mechanism 21 is linked via a push-pull wire 30 to a second operation lever 29 erected on the right handle bar 9B of the operation handle 9 so as to be able to swing back and forth. In other words, the second cutting lever 3B is moved back and forth by the second operating lever 29 to move the second cutting unit 3B to the drive shaft center P4 of the first cutting unit 3A.
It can swing back and forth around, so that the cutting width of the slope cutting device 3 can be changed. The second operation lever 29 is swingably supported by a shaft transmission portion 21D of the second transmission mechanism 21 with respect to a fan-shaped engaged plate 31 fixed to the second gear transmission portion 20B of the first transmission mechanism 20. An operation rod 33 for releasing the engagement of the engagement arm 32 is fitted inside. 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 able to swing back and forth. Release wire 3
5 are linked. The operating rod 33 is biased by a tension spring 36 extending from the second operating lever 29 to the crank arm 34 so as to protrude from above the second operating lever 29. The engagement arm 32 is urged by a helical spring 37 to engage with the engaged plate 31. That is, by pushing the operating rod 33 against the tension spring 36 and the helical spring 37, the engagement of the engagement arm 32 with the engaged plate 31 can be released. The operation of swinging the second reaping unit 3B forward and backward by the operation lever 29 can be performed. 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 helical spring 37, so that the second reaping portion 3B is driven by the drive shaft center. It can be held in a desired posture around P4.

As shown in FIGS. 1 and 17, the cutting clutch 22 is linked via a release wire 39 to a cutting clutch lever 38 mounted on the left handlebar 9A of the control handle 9 so as to be able to swing up and down. And
It is of a deadman type that can be switched to the transmission state by an upward swinging operation of the reaping clutch lever 38 by gripping the left handle bar 9A and the reaping clutch lever 38 together.

As shown in FIGS. 2 to 4, 6 and 7,
At the rear end of the first cutting unit 3A in the slope cutting device 3,
A rear wall body 40 for preventing the cut grass and the like cut by the first cutting unit 3A from scattering to the rear is provided. Rear wall 4
Numeral 0 designates a rubber plate 40A forming a rear wall portion and a support member 40B supporting the rubber plate 40A, and a housing 13 serving as a fulcrum on the side of the road surface reaping device 2 Is connected so as to be able to swing back and forth around a vertical axis P7 set at the left rear end portion of the and to be able to swing up and down around a horizontal axis P8.
Via a link 41. The horizontal axis core P8 is
When the second reaping unit 3B of the slope reaping device 3 is located at the position immediately to the left of the first reaping unit 3A, the second reaping unit 3B is located on an extension of the front-rear axis P3. That is, the rear wall body 40
Swings back and forth around the longitudinal axis P7 in conjunction with the longitudinal swing operation of the second reaping unit 3B around the drive shaft center P4,
It is configured to swing up and down around the horizontal axis P8 in conjunction with the up and down swinging operation of the slope cutting device 3 around the front and rear axis P3. Part 3
Regardless of the change in the cutting width of the slope cutting device 3 that swings back and forth around the drive shaft center P4 of A, and the change in the posture of the slope cutting device 3 around the front and rear shaft center P3, the first cutting portion 3A. While being able to prevent the scattering of cut grass and the like from the rear, it is provided at the rear end of the first cutting unit 3A,
This prevents an obstacle when changing the cutting width of the slope cutting device 3 that swings the second cutting unit 3B back and forth around the drive shaft center P4 of the first cutting unit 3A.

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 shaft center P4 of the first cutting portion 3A is changed. Since the housing 15 of the first reaping unit 3A and the housing 17 of the second reaping unit 3B may be separated from each other in accordance with the operation to form a gap, the cover 42 for filling the gap is provided with the second reaping. First cutting section 3A in housing 17 of section 3B
It extends from the end on the side toward the first reaping unit 3A.
In other words, the cover 42 is provided at the end of the housing 17 of the second reaping unit 3B on the side of the first reaping unit 3A, so that during the reaping operation, the cutting width of the sloping reaper 3 is changed so that the slope reaping device 3 is removed. The cut grass can be prevented from scattering from a gap formed between the housings 15 and 17. In addition, the housing 1 of the first reaping unit 3A
5, a pressing plate 43 for preventing the cover 42 from rising from the upper surface of the first cutting unit 3A is provided on an upper surface portion on the second cutting unit 3B side. The cut grass can be prevented 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 a 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 rear wheel 8
Is located near the rear end, and the front side of the body can be largely levitated with the support shaft 8a of the rear wheel 8 as a fulcrum. That is, for example, when it becomes necessary to move over the stepped portion while traveling with the left and right widths of the aircraft minimized by positioning the free end of the second reaping unit 3B at the rearmost position, In the case where the free end is set to be located rearward from the rear end of the rear wheel 8, even if the front side of the body is lifted with the axle 8a of the rear wheel 8 as a fulcrum, the second reaping portion 3B Since the front end side of the fuselage cannot be levitated greatly due to the free end coming into contact with the road surface, there is a disadvantage that it is not possible to easily climb over the stepped portion. Since the free end of the mowing part 3B is set near the rear end of the rear wheel 8, as shown in FIG. 20, the front side of the body is set with the support shaft 8a of the rear wheel 8 as a fulcrum. Can levitate greatly and easily climb over steps So that the can be.

As shown in FIGS. 6 and 7, the road surface reaping device 2 is configured such that the rotating blade 14 rotates counterclockwise in plan view. The slope cutting device 3 is configured such that the rotating blade 18 of the second cutting unit 3B on the side of the first cutting unit 3A rotates counterclockwise in plan view, and the other rotary blades 16 and 19 rotate clockwise in plan view. Have been. With this configuration, the rotating blade 14 of the road cutting device 2 and the rotating blade 16 of the first cutting portion 3A of the slope cutting device 3 are used.
The cut grass can be guided between the rotating blades 14 and 16 by the action of the rotating blades 14 and 16, and can be smoothly discharged backward from between the rotating blades 14 and 16, , Each rotating blade 18, 19 of the second cutting unit 3 </ b> B in the slope cutting device 3.
The cut grass can be guided between the rotating blades 18 and 19 by the action of the rotating blades 18 and 19 and can be smoothly discharged rearward from between the rotating blades 18 and 19. Has become.
That is, when the rotating blade 14 of the road surface reaping device 2 is configured to rotate clockwise in a plan view, the cut grass cut by the rotating blade 14 is removed by the housing 13 and the rotating blade 14 of the road surface reaping device 2. And the rotation blade 19 on the free end side of the second cutting part 3B of the slope cutting device 3 is rotated counterclockwise in a plan view. This causes inconvenience that the cut grass that has been cut by the rotating blade 19 accumulates between the housing 17 of the second cutting unit 3B and the rotating blade 19 and hinders cutting and running. Blade 14,1
6, 18 and 19 are configured to rotate in the same direction, resulting in their rotating blades 14, 16, 18, 19
Thus, it is possible to avoid inconveniences such as the cut grass that is cut off and accumulated without being discharged from between them, which hinders cutting and running, and is excellent in cutting performance and running performance.

As shown in FIGS. 2, 6, and 7, the rear wheel 8 is mounted on a drive shaft 8a extending leftward and outward from a lower portion of the transmission case 6 which is a support shaft 8a. It is constituted by a pair of rubber tires 8A, and is driven by the power from the engine 5 transmitted via the transmission case 6. As shown in FIGS. 15 and 16, on the upper side of the transmission case 6,
A traveling speed reduction mechanism A communicably connected to the input shaft 6a is provided. The speed reduction mechanism A includes a speed change unit Aa capable of switching the power from the engine 5 between high and low to reduce the speed.
And a clutch Ab for intermittently transmitting power from the engine 5 to the rear wheel 8. Specifically, the speed reduction mechanism A
Is a first high-speed gear 44 and a first low-speed gear 45 externally fitted to the input shaft 6a so as to be relatively rotatable, a second high-speed gear 46 meshing with the first high-speed gear 44, and a second high-speed gear 46 meshing with the first low-speed gear 45. A low-speed gear 47, a transmission shaft 48 provided below the input shaft 6a to support the second high-speed gear 46 and the second low-speed gear 47 so as to be rotatable integrally, and a first relay gear 48a formed integrally with the transmission shaft 48. A second relay gear 49 externally fitted to the input shaft 6a so as to be rotatable relative to the input shaft 6a, externally fitted to the input shaft 6a so as to be rotatable and slidable, and to the second relay gear 49 by a sliding operation. Integrally formed engaging claw 49
a shift gear 50 having a meshing claw 50a meshable with
And a final gear 51 which is rotatably fitted to the transmission shaft 48 in a state of meshing with the shift gear 50. Of these, the first high-speed gear 44, the first low-speed gear 45, and the second high-speed gear The transmission 46 includes the gear 46 and the second low-speed gear 47. Further, the clutch portion A is formed by the second relay gear 49 and the shift gear 50.
b. An output sprocket 52 is attached to the final gear 51 of the speed reduction mechanism A so as to be rotatable integrally.
From the output sprocket 52, an input sprocket 53 that is integrally rotatably mounted on a drive shaft 8a for driving the rear wheel 8.
The chain 54 is wound over the entirety. That is,
With the above-described configuration, the power from the engine 5 is transmitted to the rear wheel 8 so that the power can be intermittently switched and the height can be switched between two levels.

As shown in FIGS. 1, 2, and 15, the switching operation of the transmission portion Aa is performed by swinging a transmission lever 55 extending rearward from the upper left side of the transmission case 6 backward. Thereby, the shift shaft 56 with the key 56a slidably fitted on the input shaft 6a is slid, and the key 56a is selectively engaged with the first high-speed gear 44 or the first low-speed gear 45. It can be done by doing. As shown in FIGS. 1 and 16, the switching operation of the clutch Ab is performed by connecting the shift gear 50 via the shift fork 57 and the release wire 58 to the right handlebar 9B of the steering handle 9.
Running clutch lever 5 equipped to be able to swing up and down
A spring (not shown) for operating the shift fork 57 in the transmission cutting direction by gripping the shift fork 57 with the right handle rod 9B.
The deadman system is configured to switch to the transmission state by swinging upward against the urging of the above.

As shown in FIGS. 1 to 4, 15 and 16, the front wheel 10 is provided with a power take-out shaft disposed between the speed reduction mechanism A in the transmission case 6 and the drive shaft 8 a for driving the rear wheel 8. 6b, a first chain-type transmission mechanism 61 extending from the power take-out shaft 6b to the relay shaft 60 disposed at the front of the housing 13 in the road mowing device 2, and a second chain-type transmission mechanism 61 extending from the relay shaft 60 to the support shaft 10a of the front wheel 10. Two chain transmission mechanism 62
And so that they can be transmitted. Power take-out shaft 6b
The transmission shaft 48 which is the final transmission shaft in the speed reduction mechanism A
The sprocket 6c meshing with the chain 54 wound around the output sprocket 52 mounted on the drive shaft 8a and the input sprocket 53 mounted on the drive shaft 8a is integrally rotatably connected to the chain 54. That is, the front wheels 10 are driven by the power from the engine 5 transmitted via the belt-type transmission mechanism 7, the transmission case 6, the first chain-type transmission mechanism 61, and the second chain-type transmission mechanism 62. Has become. Also,
By disposing the power take-out shaft 6b for driving the front wheel 10 higher than the drive shaft 8a for driving the rear wheel 8, the front wheel 1
The transmission system for zero drive can be prevented from being damaged by contacting the ground or the like due to the inclination of the body or the unevenness of the ground.

As shown in FIGS. 1 to 4 and FIGS. 12 to 14, the second chain type transmission mechanism 62 includes a
The front wheel 10 is mounted on a pair of left and right support brackets 63 erected on the housing 13 so as to be swingable up and down and extends forward, and the front wheel 10 is attached to the extended end thereof. I have. That is, the second chain type transmission mechanism 62
The vertical position of the front wheel 10 with respect to the road surface reaping device 2 can be changed by the vertical swing operation, and the cutting height of the road surface reaping device 2 can be changed. The second chain-type transmission mechanism 62 expands a plurality of (five in this embodiment, as shown in FIG. 14) the left support bracket 63 by tightening a bolt 64 with a knob having an enlarged diameter portion 64a. A long hole 6 formed to have a diameter portion 65a
5 can be fixed to a desired swinging posture without using a tool by engaging with any of the enlarged diameter portions 65a, whereby the cutting height changing operation of the road surface cutting device 2 can be performed. It can be done easily.

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 20 B of the first transmission mechanism 20, and It is possible to change the height position with respect to the slope cutting device 3 in front of the first cutting portion 3A in the slope cutting device 3 via a support rod 67 extending from the support arm 66 so as to be vertically swingable. It is arranged to become. That is, since the auxiliary wheel 11 is disposed in front of the first cutting unit 3A, the auxiliary wheel 11 can be cut by the slope cutting device 3 even when the slope cutting device 3 is set to the minimum cutting width. Since it can be located within the width, even if it is a narrow work place that needs to be steered with the slope cutting device 3 set to the minimum cutting width, it can enter the work place, Even in a work place, it is possible to steer in a stable posture in which the load of the slope reaper 3 is deposited on the ground, thereby improving the stability during running and the workability. Also, by changing the height position of the auxiliary wheel 11 with respect to the slope cutting device 3, the cutting height of the slope cutting device 3 can be changed. At the rear end of the support rod 67, a plurality (in this embodiment, FIG.
(See FIG. 5), a connection plate 68 having five connection holes 68a formed therein is mounted.
By inserting the connecting pin 66a mounted on the support arm 66 into any one of the support arms 8a, the support arm 66 can be fixed to 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 to 11, the support rod 67 is supported by a connecting plate 68 so as to be rotatable around its axis P9, and an operation arm fixed to a rear portion thereof. 67a is the housing 13 of the road surface reaping device 2.
The swing arm 70 is pivotally connected to a free end of a swing arm 70 that is swingably connected to a fixed plate 69 erected on the front side around the front-rear axis P10. From this configuration, the auxiliary wheel 1 attached to the support rod 67
Numeral 1 rotates around the axis P9 of the support rod 67 in conjunction with the vertical swing operation around the longitudinal axis P3 of the slope reaper 3. The attitude with respect to the reaper 3 is changed to be maintained in a substantially vertical attitude. In other words, the auxiliary wheel 11 is maintained in a substantially vertical position regardless of the inclination angle of the slope reaper 3, thereby making it easier to receive the load of the slope reaper 3 and thereby the load applied to the auxiliary wheel 11. As a result, the biting force on the inclined surface obtained is increased, so that side slip on the inclined surface is less likely to occur. As shown in FIGS. 8 and 9, the connection position of the swing arm 70 with respect to the fixing plate 69 of the road surface reaper 2 can be changed, and the posture of the auxiliary wheel 11 is changed by changing the connection position. Can be changed.

[Other Embodiments] Other embodiments of the present invention will be listed below. Various modifications can be made to the configuration of the mowing devices 2 and 3 provided in the walking-type mower. For example, it may be configured to be equipped with only the road surface reaper 2,
You may comprise so that cutting may be performed by the relative horizontal reciprocation sliding of a pair of upper and lower blade bodies. The speed reduction mechanism A includes a transmission section Aa and a clutch section Ab.
It may be of a configuration not equipped with. The final transmission shaft 48, the drive shaft 8a, and the power take-out shaft 6b of the speed reduction mechanism A may be linked to each other by a gear or a belt.

[Brief description of the drawings]

FIG. 1 is an overall side view of a walking-type mower.

FIG. 2 is an overall plan view of a walking type mower.

FIG. 3 is a plan view of a cutting unit in a state where a slope cutting device is set to a maximum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 4 is a plan view of a cutting unit in a state where a slope cutting device is set to a minimum cutting width, showing a support structure of a front wheel and an auxiliary wheel and a configuration of each cutting device.

FIG. 5 is a longitudinal sectional front view showing the configuration of each reaper.

FIG. 6 is a schematic plan view of the walking type mower showing the arrangement of the front wheels and the auxiliary wheels and the state where the cutting device for the slope has been set to the maximum cutting width.

FIG. 7 is a schematic plan view of a walking-type mower showing the arrangement of front wheels and auxiliary wheels, and a state in which a slope cutting device is set to a minimum cutting width.

FIG. 8 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in a horizontal posture.

FIG. 9 is a front view of the reaper showing a state in which the support structure of the auxiliary wheels and the sloping reaper are set in an inclined posture.

FIG. 10 is a longitudinal sectional side view of a slope cutting device showing a support structure of an auxiliary wheel.

FIG. 11 is a longitudinal sectional plan view of a main part showing a support structure of an auxiliary wheel.

FIG. 12 is a side view of a main part showing a support structure for a front wheel.

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

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

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

FIG. 16 is a longitudinal sectional side view showing a transmission structure in a transmission case.

FIG. 17 is a side view of a main part showing a configuration of an operation lever unit for vertically swinging the slope reaper.

FIG. 18 is a plan view of a main part showing a configuration of an operation lever unit that vertically swings and operates the slope cutting device.

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

FIG. 20 is a schematic side view of the walk-behind mower, showing a state where the mower has climbed on a step;

[Description of Signs] 1 Traveling body 2 Road surface reaper 3 Slope reaper 3A First reaper 3B Second reaper 29 Operation lever

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takafumi Mizobe, Inventor 4-15-5, Miwadori, Mihara-cho, Minamikawachi-gun, Osaka Inside Kubota Seiki Co., Ltd. (72) Shinya Inada 4-chome, Miwadori, Mihara-cho, Minamikawachi-gun, Osaka No. 15-5 Inside Kubota Seiki Co., Ltd.

Claims (1)

[Claims] At least one side of the road-side mowing device is provided with a road-side mowing device that cuts grass grown on a running road surface at a front portion of the walking-type running body. A lawn mower in which a slope mowing device for mowing grass grown on an inclined surface connected to one side end is connected in a vertically swingable manner, wherein the slope mowing device is the road surface mowing device. An operating lever for adjusting the swing of the second mowing portion back and forth, comprising a first mowing portion adjacent to the first mowing portion and a second mowing portion swingable in the front-rear direction with respect to the first mowing portion. Characterized in that the mower can be operated from a body operation position.