JPH0685652B2 - Mower - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mowing machine for mowing ridges and the like.

[Prior Art] Conventionally, in this kind of ridge mower, a transmission case and a mowing transmission case are separated from each other in the front-rear direction, and traveling wheels are generally constructed below the mission case. Target.

[Problems to be Solved by the Invention]

In such a conventional structure, the transmission structure is complicated and cannot be compactly integrated, the center of gravity is high, and the structure is unstable, and in particular, there is a problem in traveling on a slope.

The present invention is intended to solve such problems, and has taken the following technical means.

[Means for Solving the Problems]

That is, the technical means according to the present invention is a grass mower including a vehicle body 1 on which traveling wheels 2 are installed, a mowing device 3 in front of the vehicle body, a handle 4 projecting rearward of the vehicle body, an engine 5 for driving the mowing device, and the like. , A transmission case 9 having a gear transmission mechanism 12, 13 for transmitting power to the traveling transmission shaft 10 to the traveling wheel 2 and the cutting transmission shaft 11 to the harvesting device 3, the cutting transmission shaft 11 and the cutting transmission gears 14, 15 And a cutting transmission case 16 that internally houses the case, and is configured to have a substantially concave shape in a downward direction in a side view, and the traveling wheel 2 is constructed below the inside of the concave portions of the cases 9 and 16. is there.

〔The invention's effect〕

Therefore, according to the present invention, by forming the transmission case 9 and the reaping transmission case 16 in a substantially concave shape facing downward in a side view, not only can the transmission structure for each part be summarized compactly, but also the concave part thereof. Since the traveling wheels can be installed inward and downward, the center of gravity of the main body can be lowered by forming the traveling wheels in the shape of a single-wheel roller as in the embodiment, and stable traveling can be facilitated even on the slope. There are features.

〔Example〕

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

On a machine body (vehicle body) 1, traveling wheels 2 are mounted on the lower part, and a handle 4 is provided on the rear part via an engine 5 and a handle support rod 7 projecting long rearward, and on the front part, a reaping device described later. 3 is provided.

The handle support rod 7 is configured to be rotatable and fixed about the vertical axis 6 and vertically rotatable about the horizontal axis 8.

Reference numeral 9 denotes a mission case. Inside the mission case 9, gear transmission mechanisms 12 and 13 for transmitting power to a traveling transmission shaft 10 to the traveling wheels 2 and a cutting transmission shaft 11 to the cutting device 3 are installed. The traveling transmission shaft 10 and the reaping transmission shaft 11 have an inner and outer double shaft structure.

In front of the mission case 9, a reaper transmission case 16 containing the reaper transmission shaft 11 and the reaper transmission gears 14 and 15 is continuously provided, and the case 9 and 16 form a downward concave shape in a side view. is doing.

The cutting transmission case 16 is provided with a drive shaft cylinder 18 in which the drive shaft 17 is housed so as to project toward the front, and a driven shaft 19 parallel to the drive shaft 17 is provided laterally from the drive shaft cylinder 18 side. The drive wheel 17 and the driven wheel 22 are mounted on the drive shaft 17 and the driven shaft 19 and the band-saw endless cutting blade 23 is wound around them. And constitutes the harvesting device 3.

A is a tensioner for moving and adjusting the driven wheel 22 in the perspective direction with respect to the driving wheel 21, and B is a tensioner rotation fulcrum, which is connected to the tip of the support frame 20. C is a tension spring, D is a lock release lever, and E is a rotation fulcrum of the lock release lever D. Therefore, when the lock release lever D is rotated around the fulcrum E in the releasing direction, the tension state of the tension spring C is loosened, and at the same time, the driven wheel 22 is driven by the driven wheel 21 due to the swinging of the tensioner A around the fulcrum E. Move toward the side.

Further, the driven wheel 22 is rotatable about the vertical axis Y, and the tilt angle can be adjusted so that the winding side of the cutting blade 23 is located rearward in plan view.

F is a cutting blade angle adjusting plate for changing and adjusting the cutting device 3 (band saw type endless cutting blade 23) to an arbitrary inclination angle around the drive shaft 17, and has a locking hole G and a locking tool H. It is fixed to the front of the transmission case 16.

The traveling wheels 2 are arranged below the downward recesses 24 of the cases 9 and 16, and are arranged from the traveling transmission shaft 10 to the worm wheel mechanism 2.
5, 26. Traveling drive shaft 27. Chain drive system 28 is interlocked to be rotationally driven via a transmission chain 29 in a case 28.

Another worm wheel transmission mechanism 30, 3 from the traveling drive shaft 27
A constant rotation shaft 32 that is rotationally driven via 1 is provided with two turning gears 33, 34 vertically spaced from each other, while the vertical axis 6 is a clutch that meshes with the upper turning gear 33. A gear 35, a lower turning gear 34, and a clutch gear 37 that meshes with an intermediate gear 36 are integrally configured with a shift shaft 38 so as to be vertically slidable.

Therefore, when the swivel gear 33 and the clutch gear 35 mesh with each other, the mowing device 3 swivels right around the vertical axis 6,
34. When the intermediate gear 36 and the clutch gear 37 mesh with each other, the harvesting device 3 turns counterclockwise around the vertical axis 6 contrary to the above.

Reference numeral 39 is a lock gear that restricts rotation of the clutch gears 35 and 37 in the neutral position, 40 is a shifter that slides the shift shaft 38 in the axial direction, and 41 is an operating arm that can swing about the intermediate portion P as a fulcrum. The operation wires 44, 44 are linked to operate 40, and operation wires 44, 44 interlocking with clutch levers 42, 43 provided on both left and right sides of the handle 4 are connected to both ends thereof.

In the case of reciprocating mowing from the road side above or below the slope during mowing work on the slope, first, with the handle 4 protruding rearward of the vehicle body changed to a predetermined angle with respect to the traveling direction of the machine body, deep. Then, the worker advances the machine body while laterally walking from the road side above or below the slope, and cuts grass on the slope. Then, when it reaches the end of the outward path of the slope, it makes a return turn in the opposite direction, but at this time,
Clutch lever 42 or 43 provided near the handle 4
By this operation, the clutch for turning and driving the direction of the reaping device back and forth is engaged. Then, the reaper 3
The motive power from the engine 5 is transmitted and the gyro is driven to rotate about the six axis of the vertical axis, and the direction is changed by 180 degrees. Then, if the machine body is moved backward under such a condition, the work of cutting the return path on the slope is performed.

In the embodiment shown in FIGS. 8 and 9, a gear 45 is provided at the lower end of the vertical axis 6 that can reciprocate left and right, and a shaft 47 provided with a gear 46 that meshes with the gear 45 and is driven to rotate. , A spiral shaft in which the length of the handle supporting rod 7 can be expanded and contracted by reciprocating rotation.
By interlocking with 48 via the interlocking mechanism 49, for example, when the mowing device 3 turns left around the vertical axis 6, the length of the handle support rod 7 becomes shorter, and conversely, the mowing device 3 becomes longer. When the handle 6 is rotated right about the axis 6, the length of the handle supporting rod 7 is automatically adjusted so as to be long. This is suitable for rounding work during slope cutting.

Another embodiment In the embodiment shown in FIG. 10, the outer periphery of the driving wheel body 21 and the driven wheel body 22, as a means for preventing the band saw type endless cutting blades 23 wound around them from being separated to the front side. , (A) of Fig. 10,
As shown in (b), (c), and (d), an elastic body 50, which is located on the front side and protrudes high in the outer peripheral direction, is attached.

The detachment of the band saw type endless cutting blade 23 to the rear side is prevented by the collar portions 21a and 22a. Note that FIG. 10 (e) shows a configuration in which an O-ring 51 is attached to the outer peripheral portions of the wheels 21 and 22.

In the embodiment shown in FIG. 11, this machine uses guide rails on the traveling wheels 2.
It is configured to be able to move in the left-right lateral direction along the 52, and the outer periphery of the traveling wheel 2 is prevented from sliding in the lateral direction (in particular, when working on a slope, it tends to slide down in the slope direction). A spike 53 is attached as a means.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention.
The figure is a perspective view of the mower, FIGS. 3 and 4 are side sectional views of the main part, FIG. 5 is a partially cutaway plan view of the main part, FIG. 6 is a front view of the main part, and FIG. Is a plan view thereof, FIG. 8 is a side sectional view of another embodiment, FIG. 9 is a plan view showing a working state, FIG. 10 is a sectional view of an essential part of a wheel body, and FIG. 11 is a front view of a traveling wheel. is there. DESCRIPTION OF SYMBOLS 1 ... Car body, 2 ... Traveling device (wheel) 3 ... Mowing device, 4 ... Steering wheel 5 ... Engine, 6 ... Vertical axis 7 ... Steering rod support, 8 ... Horizontal axis 9 ... Mission case, 10 ... Travel transmission shaft 11 ... Mowing power transmission shaft, 12 ... Gear power transmission mechanism 13 ... Gear power transmission mechanism, 14 ... Mowing power transmission gear 15 ... Mowing power transmission gear, 16… Mowing power transmission case 17… Drive shaft, 18… Drive shaft cylinder 19… Drive shaft, 20… Support frame 21… Drive wheel body, 22… Driven wheel body 23… Band saw type endless cutting blade, 24… Concave section 25,26… Warm wheel mechanism 27… Traveling drive shaft, 28… Chain case 29… Transmission chain 30,31… Worm wheel transmission mechanism 32 ... Continuous rotation shaft, 33,34 ... Swing gear 35 ... Clutch gear, 36 ... Intermediate gear 37 ... Clutch gear, 38 ... Shift shaft 39 ... Lock gear, 40 ... Shifter 41 ... Actuating arm, 42 ... Clutch lever 43 ... Clutch lever, 44 ... Operating wire 45 ... Gear, 46 ... Gear 47 ... Shaft, 48 ...旋軸 49 ... interlocking mechanism, 50 ... elastic body 51 ... O-ring, 52 ... guide rail Te 53 ... spike

Claims (1)

[Claims] 1. A mowing machine comprising a vehicle body 1 on which traveling wheels 2 are installed, a mowing device 3 in front of the vehicle body, a handle 4 projecting rearward of the vehicle body, an engine 5 for driving the mowing device, etc., to the traveling wheels 2. Of the traveling transmission shaft 10 and the gear transmission mechanism 12 and 13 for transmitting power to the harvesting transmission shaft 11 to the harvesting device 3, and a harvesting transmission case containing the harvesting transmission shaft 11 and the harvesting transmission gears 14 and 15 therein. 16 to form a substantially concave shape in a downward direction when viewed from the side.
A lawn mower characterized in that the traveling wheel 2 is constructed below the inside of the concave portion of 16.