JP4408336B2 - Management machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a walking type management machine having a rotary tiller.
[0002]
[Prior art]
Conventionally, a management machine having a rotary tiller is provided with a loop-shaped handle, and a main clutch lever (or deadman lever) is rotatably provided on the handle. By rotating the main clutch lever and simultaneously grasping the handle and the clutch lever, the main clutch is in the “on” state, and the management machine is allowed to run and work. In addition, a diff lock control lever is provided near the handle, and when working, the diff lock is set to “ON” to perform work.When turning, the diff lock is switched to “OFF”, and the rotary tillage device is lifted to the surface and turned. Had gone.
[0003]
[Problems to be solved by the invention]
However, since the conventional management machine grips the handle and the main clutch lever at the same time when traveling, there is a problem that the grip diameter becomes large and is difficult to grip. Further, during turning, the diff lock was switched to “off”, the work clutch was turned off, the rotary tiller was lifted to the ground surface, and turning was performed, so the operation was increased.
[0004]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0005]
In the management machine (1) in which the deadman main clutch lever (21) is provided on the handle (20) protruding rearward of the machine body, the deadman main clutch lever (21) has a gate shape in plan view or a recess in the center. It is formed in a substantially M shape in plan view, and is shaped to match the operating portion (20a) formed in the loop shape of the handle (20). The clutch is connected by grasping, and the clutch is disconnected when the grasped state is released. A part of the operation part (20a) of the handle (20) is arranged so as to overlap with the deadman main clutch lever (21) being gripped, and the operation part (20a) of the handle (20) A grip portion (20c) formed in a half-moon shape in cross-section when the upper surface is a plane, the grip portion (20c) includes the handle operation portion (20a) and the deadman main clutch lever (21). When gripped at the same time, they are overlapped and integrated, and are configured to be approximately the same size as one grip, and the diff lock and release of the pair of left and right running wheels (15) are placed in front of and below the mission case (5). The diff lock device is stored, and a PTO clutch is provided between the PTO shaft and the input shaft (17) in the transmission case (5), and the diff lock / unlock of the traveling wheel and the drive / stop by the PTO clutch are performed. An interlocking lever (24), which is a switching means for switching at the same time, is provided on the handle (20), the interlocking lever (24) is formed in a substantially U shape in plan view, and both left and right ends are supported by the handle (20). The operation of the interlocking lever (24) allows the simultaneous operation of releasing the differential lock and stopping the rotary tiller (4), and the interlocking lever (24) is connected to the deadman main clutch. In front of Chireba (21), in which is disposed near the operation unit of (20a) said handle (20).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the invention will be described.
[0007]
FIG. 1 is an overall side view of the management machine, FIG. 2 is a cross-sectional view of a handle and a clutch lever, and FIG. 3 is a perspective view of a handle and an interlocking lever of another configuration. 4 is a perspective view of the handle and the interlocking lever of the embodiment, FIG. 5 is a side view of the handle and the interlocking lever of the embodiment, and FIG. 6 is a rear view of the rotary tiller.
[0008]
First, the overall configuration of the management machine will be described with reference to FIG. The management machine 1 has an engine 3, a transmission case 5, and a rotary tiller 4 as drive sources arranged from the front, an axle 6 for driving a pair of left and right traveling wheels 15 on the front lower part of the transmission case 5, and the rear A cultivating shaft 41 for driving the rotary cultivating device 4 is pivotally supported at the lower portion, and power from the engine 3 is transmitted to the traveling wheels 15 and the rotary cultivating device 4 through an integral transmission case 5. Further, a loop-like handle 20 is extended from the transmission case 5 to the rear upper side of the machine.
[0009]
The power of the engine 3 is transmitted from the output pulley on the output shaft to an input pulley provided on the input shaft 17 projecting laterally from the transmission case 5 via a belt, and belt tension is provided between the output pulley and the input pulley. A main clutch is provided and is covered with a transmission case 11. The main clutch can be turned on and off by a deadman clutch lever 21 which is a main clutch lever provided on the handle 20. The main transmission lever 16 protrudes rearward from the mission case 5 so that the gear can be changed, and can be operated from the rear of the management machine 1. A fuel tank 13 is disposed above the engine.
[0010]
Next, a description will be given of a clutch lever as a handle and clutch switching means.
As shown in FIG. 3, the handle 20 is formed of a pipe-like member in a loop shape, and includes an operation unit 20a that operates the handle 20 and support units 20b and 20b that support the operation unit 20a. . However, it can also be V-shaped or Y-shaped in plan view with the rear open. A front portion of a deadman (main) clutch lever 21 is rotatably supported on the handle 20 by a pin 22 or the like. The main clutch lever 21 is formed in a gate shape in plan view or in a substantially M shape in plan view with a recess in the center, and is configured according to the shape of the handle 20, and when it is turned and gripped, The handle 20 and the main clutch lever 21 are substantially matched.
[0011]
One end of a wire 23 is connected to the main clutch lever 21 and the other end of the wire 23 is linked to the belt tension clutch. By rotating the main clutch lever 21 downward (to the handle side) and simultaneously grasping the handle 20 and the main clutch lever 21, the main clutch is brought into an “on” state, working and running, and releasing the main clutch lever 21. Thus, the main clutch is in the “disengaged” state, and traveling and work are stopped.
[0012]
A part of the handle is arranged so as to overlap when the clutch lever is grasped, and the thickness when the handle and the clutch lever are grasped is substantially the same as the thickness of the handle of the other part. I am trying. That is, as shown in FIG. 2, the handle 20c is formed in a half-moon shape in a cross-sectional view with the upper surface of the operation portion 20a of the handle as a plane. The grip portion 20c is configured to overlap and become integrated when the handle operating portion 20a and the main clutch lever 21 are gripped at the same time, and is approximately the same size as one grip. However, in the present embodiment, the grip portion 20c has a half-moon shape in cross section, but it may be formed in a concave shape, a flat bar shape or the like to engage the main clutch lever 21, or the main clutch lever 21 and the grip portion 20c. Are not limited as long as they are approximately the same size as one grip or other portion of the support portion 20b. Moreover, the main clutch lever 21 can also be comprised by the cross-sectional half moon shape. Further, in the present embodiment, the grip portion 20c is cut out in the vertical direction, but the side surface may be cut out.
[0013]
In this way, by providing the handle 20 with the grip portion 20c having a reduced cross-sectional shape, the handle 20 and the clutch lever 21 can be gripped without leaving the hand at the same time when the management machine 1 is run or operated. In the prior art, the main clutch lever 21 was gripped in excess of the handle, so that the grip portion became thick and it was difficult for an operator of a small hand to grip. With a sense of thickness, the clutch lever 21 and the handle 20 can be simultaneously placed in the hand and easily gripped.
[0014]
Next, a description will be given of the interlocking lever 24 which is a switching means for simultaneously switching the diff lock / unlock of the traveling wheel and the driving / stopping of the rotary tiller 4. A diff lock device (not shown) is housed in a traveling case extending forward and downward from the mission case 5, and the diff lock device can be switched on and off by turning an arm or the like as an operation unit. 5 is provided with an operating portion that can switch between driving and stopping of the rotary tiller 4, and the handle 20 is provided with an interlocking lever 24 that is an operating member that is interlocked with both the operating portions, so that both operations can be performed simultaneously. I can do it. That is, as shown in FIG. 3, an interlocking lever 24 is attached to an arbitrary position of the handle 20, and the interlocking lever 24 is operated in front of the clutch lever 21 in the vicinity of the operation portion 20a of the handle in this embodiment. It is arranged at an easy position.
[0015]
One end of a wire 25 is connected to the interlocking lever 24, and the other end of the wire 25 is disposed in a transmission case and connected to a PTO clutch and a differential lock device. Specifically, a PTO clutch is provided between the PTO shaft in the mission case 5 and the input shaft 17, and the other end of the wire 25 is connected to an operation arm for operating the PTO clutch and a shifter of the differential lock device. By rotating the interlocking lever 24, the PTO clutch becomes "disengaged" and power transmission to the rotary tiller 4 is cut off, and at the same time, the right and left traveling wheels are unlocked. By this switching operation, rotation of the rotary (cultivation claw shaft) is stopped, and at the same time, the differential lock is released and the left and right traveling wheels can be differentiated.
[0016]
Further, as shown in FIGS. 4 and 5, the interlocking lever 24 can be formed in a substantially U shape in plan view. In this case, the interlocking lever 24 is disposed in front of the main clutch lever 21 in the vicinity of the operation portion 20 a of the handle 20, is formed in a substantially U shape in plan view, and both left and right end portions are supported by the handle 20. As shown in FIG. 5, by switching the interlocking lever 24, the switching operation for switching on / off of the diff lock of the traveling wheel and the switching operation for rotating / stopping the rotary tiller can be performed simultaneously. ing.
[0017]
In this way, it can be operated from both the left and right sides by forming it in a substantially U shape in plan view, and it is possible to simultaneously switch on / off of the diff lock and rotation / stop of the tillage device with one lever. Therefore, the working efficiency can be improved, the number of parts can be reduced, and the cost can be reduced. Further, since the interlocking lever 24 is disposed in the vicinity of the operation portion 20a of the handle, the switching operation can be easily performed.
[0018]
Next, the stabilizer of the rotary tiller 4 will be described. As shown in FIG. 1, a stabilizer 46 is attached to a lower portion of a rotary case 5 a extending downward from the mission case 5. The stabilizer 46 is formed by bending a steel rod, with the front end fixed to the lower portion of the rotary case 5a and the other end extending rearward and downward. The mounting portion at the front portion of the stabilizer 46 can be fixed with a bolt or the like so that the mounting position can be changed. The stabilizer 46 plays the role of a resistance rod to prevent a dash and to prevent a winding or the like from being wound around the tilling depth adjusting member 45 disposed rearward. A tilling depth adjusting member 45 is mounted on the rear end of the beam 47 supporting the rotary tilling device 4 so that the vertical position can be adjusted. The tilling depth adjusting member 45 is constituted by a steel rod or the like and is inserted into a pipe. It is attached so that it can be fixed by a bolt or the like so that the vertical position can be adjusted, and the tilling depth can be changed by changing the height of the tilling depth adjusting member 45.
[0019]
Conventionally, in a management machine having an integrated transmission case that transmits power to the traveling wheel of the management machine and the rotary tilling device, a dash prevention device and a resistance bar for setting the tilling depth are provided behind the tilling claw of the tilling device. However, when grass or the like is wrapped around the resistance rod, the plowing depth is not stable, and the depth of entry into the soil becomes shallow and dash is likely to occur. By configuring as above, the role of resistance rod and tilling depth adjustment is divided separately, grass and soil accumulation near the tillage adjusting device can be prevented, stable work can be done, work efficiency Can be achieved.
[0020]
Next, the rotary tiller 4 will be described. As shown in FIG. 6, a tillage shaft 41 is provided on the lower side of the rotary case 5 a of the transmission case 5 so as to project left and right, and the power from the engine 3 is transmitted to the tillage shaft 41. Claw shafts 42 and 42 made of pipe-like members are fitted on the left and right sides of the tilling shaft 41 and fixed with pins 30 or the like so that the tilling shaft 41 and the claw shafts 42 and 42 rotate integrally. I have to. On the claw shaft 42, tilling claws 43, 43,... Are radially attached at predetermined intervals via mounting brackets 42a,. .
[0021]
The claw shafts 42 and 42 can be exchanged and further extended laterally, so that the tilling width can be expanded or the tilling claws can be changed according to the work mode. In other words, the claw shaft 42 can be exchanged by removing the pin 30 and can be further extended in the width direction by combining the shaft, the claw shaft and the pin 30 outside the claw shaft 42. If the cavity outside the claw shaft 42 is left open, dirt or the like is clogged in the cavity, making it difficult to replace it. Therefore, the clogging preventing members 44 and 44 are fitted from both outsides. That is, fixing holes 42b and 44a are opened on the outer surfaces of the claw shaft 42 and the clogging prevention member 44, respectively, so that fixing pins or bolts can be inserted, and the prevention member 44 is placed outside the claw shaft 42. It is inserted more and the position of the fixing hole is adjusted and fixed with a pin or the like.
[0022]
Conventionally, a tilling shaft of the rotary tiller has been protruded laterally from the lower side of the transmission case, and a pipe-like claw shaft for fitting a tilling claw is fitted and fixed to the tilling shaft. It was made possible to change the tillage width by replacing. However, there is a problem that the pipe-shaped member is clogged with soil, it is difficult to replace the pipe-shaped member, and the working efficiency is poor. Sometimes it is possible to prevent soil from entering the claw shaft 42, and the claw shaft 42 can be easily replaced, thereby improving work efficiency.
[0023]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0024]
In the management machine (1) in which the deadman main clutch lever (21) is provided on the handle (20) protruding rearward of the machine body, the deadman main clutch lever (21) has a gate shape in plan view or a recess in the center. It is formed in a substantially M shape in plan view, and is shaped to match the operating portion (20a) formed in the loop shape of the handle (20). The clutch is connected by grasping, and the clutch is disconnected when the grasped state is released. A part of the operation part (20a) of the handle (20) is arranged so as to overlap with the deadman main clutch lever (21) being gripped, and the operation part (20a) of the handle (20) A grip portion (20c) formed in a half-moon shape in cross-section when the upper surface is a plane, the grip portion (20c) includes the handle operation portion (20a) and the deadman main clutch lever (21). When gripped at the same time, they are overlapped and integrated, and are configured to be approximately the same size as one grip, and the diff lock and release of the pair of left and right running wheels (15) are placed in front of and below the mission case (5). The diff lock device is stored, and a PTO clutch is provided between the PTO shaft and the input shaft (17) in the transmission case (5), and the diff lock / unlock of the traveling wheel and the drive / stop by the PTO clutch are performed. An interlocking lever (24), which is a switching means for switching at the same time, is provided on the handle (20), the interlocking lever (24) is formed in a substantially U shape in plan view, and both left and right ends are supported by the handle (20). The operation of the interlocking lever (24) allows the simultaneous operation of releasing the differential lock and stopping the rotary tiller (4), and the interlocking lever (24) is connected to the deadman main clutch. In front of Chireba (21), since the disposed in the operation portion (20a) near the handle (20), during running of the management machine, that is, when simultaneously gripping the work wheel and deadman main clutch lever (21) and the The handle and the switching means can have a sense of unity, the diameter of the handle and the switching means can be reduced, and the handle can be easily gripped.
In addition, the deadman main clutch lever (21) and the interlocking lever (24) which is a switching means for simultaneously switching the diff lock / unlock of the traveling wheel and the driving / stopping by the PTO clutch are connected to the operating portion ( By placing them in the vicinity of 20a), it is possible to switch both at the same time, and work efficiency can be improved.
[0025]
Further, in a management machine having a diff lock device in the traveling unit and provided with a rotary tiller, an operation unit for switching on / off of the diff lock device and an operation unit for driving / stopping the rotary tiller are provided on the handle. Since it is linked to the operation member, it is possible to operate the operation member to release the diff lock and stop the rotary tiller at the same time. It is possible to switch the cutting simultaneously, so that the work efficiency can be improved, the number of parts can be reduced, and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is an overall side view of a management machine.
FIG. 2 is a cross-sectional view of a handle and a clutch lever.
FIG. 3 is a perspective view of another structure of the handle and the interlocking lever.
FIG. 4 is a perspective view of a handle and an interlocking lever according to the embodiment.
FIG. 5 is a side view of the handle and the interlocking lever of the embodiment.
FIG. 6 is a rear view of the rotary tiller.
[Explanation of symbols]
1 Management Machine 4 Rotary Tillage Device 20 Handle 21 Clutch Lever 24 Operation Member (Interlocking Lever)

Claims (1)

In the management machine (1) in which the deadman main clutch lever (21) is provided on the handle (20) protruding rearward of the machine body, the deadman main clutch lever (21) has a gate shape in plan view or a recess in the center. It is formed in a substantially M shape in plan view, and is shaped to match the operating portion (20a) formed in the loop shape of the handle (20). The clutch is connected by grasping, and the clutch is disconnected when the grasped state is released. A part of the operation part (20a) of the handle (20) is arranged so as to overlap with the deadman main clutch lever (21) being gripped, and the operation part (20a) of the handle (20) A grip portion (20c) formed in a half-moon shape in cross-section when the upper surface is a plane, the grip portion (20c) includes the handle operation portion (20a) and the deadman main clutch lever (21). When gripped at the same time, they are overlapped and integrated, and are configured to be approximately the same size as one grip, and the diff lock and release of the pair of left and right running wheels (15) are placed in front of and below the mission case (5). The diff lock device is stored, and a PTO clutch is provided between the PTO shaft and the input shaft (17) in the transmission case (5), and the diff lock / unlock of the traveling wheel and the drive / stop by the PTO clutch are performed. An interlocking lever (24), which is a switching means for switching at the same time, is provided on the handle (20), the interlocking lever (24) is formed in a substantially U shape in plan view, and both left and right ends are supported by the handle (20). The operation of the interlocking lever (24) allows the simultaneous operation of releasing the differential lock and stopping the rotary tiller (4), and the interlocking lever (24) is connected to the deadman main clutch. In front of Chireba (21), the management unit being characterized in that disposed in the vicinity operation unit (20a) said handle (20).

Images