JPH0521528B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mower that cuts grass while moving, and can be used as a ridge mower that cuts ridge grass in a field.

[Conventional technology]

As a conventional technology for this kind of ridge mower, JP-A-59-
There is a publication number 132811.

[Problem that the invention seeks to solve]

When mowing grass in uneven grasslands or ridges, the vehicle body of the mower is on level ground, and it is often desirable to mow with the mowing device aligned along the slopes on either side of the vehicle. It is necessary to move the device from side to side and adjust its tilt.

However, in the prior art described above, the cutting blade 24 rotates around 19 axes in the front-rear direction and around 8 axes in the vertical vertical direction. Since the angle cannot be adjusted, reaping work can only be done in the horizontal plane.

Furthermore, in this prior art, the power is transmitted via the drive shaft 8 that projects downward from the engine 5, so the overall transmission structure to the cutting blade is complicated.

The present invention aims to eliminate such deficiencies of the prior art, and has taken the following technical measures.

[Means to solve the problem]

That is, the present invention provides a lawn mower in which a prime mover 35 is provided on a vehicle body 3 having running wheels 5 and a control handle 7, and a mowing device 1 driven by the prime mover 35 is disposed at the front lower part of the vehicle body 3. , a first transmission case 37 protruding forward from the prime mover 35 and a second transmission case 2 protruding downward from the front end of the first transmission case are provided near the front of the vehicle body 3;
Third transmission cases 11 and 12 are provided that protrude forward from the lower end of the second transmission case 2, and the second transmission case 2 is connected to a longitudinal transmission shaft within the first transmission case 37 and directly connected to the prime mover 35. 36, and a third transmission case 12 is provided inside the third transmission case 12 so as to be adjustable in angle around the axis of the transmission shaft 10 in the front-rear direction. did.

[Operation and effect of the invention]

When mowing grass on an uphill or downhill slope located on the left and right sides of the traveling vehicle body 3, the second transmission case 2 and the third transmission case 12 are connected to the longitudinal transmission shaft 36, If you adjust the angle by rotating it around the axis of 10, the reaping device 1
can be easily adjusted along the slope,
As a result, it is possible to easily perform cutting operations on sloped surfaces to the side of the traveling position.

Furthermore, since the rotation angle of the reaping device can be adjusted using the transmission shafts 36 and 10 to the reaping device, it can be easily constructed without providing a special rotation bearing mechanism. It is a thing,
In particular, the power transmission shaft 3 in the longitudinal direction directly connected to the prime mover 35
6, unlike conventional devices, there is no need for a drive shaft or bearing mechanism that protrudes downward from the engine, and the overall structure for transmitting power to the cutting blade is simplified.

〔Example〕

In the illustrated example, the running body 3 of the lawn mower has a handle 7 obliquely installed at the rear end of a frame 6 supported by left and right wheels 5 with respect to the forward direction A, and a handle 7 is installed vertically and horizontally on the upper side. Gate-shaped guide frame 4 for positioning the legs
At the same time, a boss 9 is provided at the front end of the frame 6 to pivotally support an arm 8 that is rotatably provided to guide the lower side of the second transmission case 2 in the left and right directions.

The second transmission case 2 has a belt interlocking mechanism inside, and a transmission shaft 10 in the front and rear direction at the lower end of the case 2.
A third transmission case 11 is provided that protrudes forward to support the. A third rotary transmission case 12 is provided around the case 11, which is fitted from the outside and allows the reaping device 1 to be tilted left and right with respect to the second transmission case 2, with the shaft 10 as the center.
Reference numeral 13 denotes a fixing pin that is detachably provided in the third transmission case 11 to fix the rotation transmission case 12 at an appropriate rotation position. 14 is a spring. The third rotation transmission case 12 is provided with a bevel transmission mechanism between it and the shaft 10 so that the transmission case 12 can freely rotate around the third transmission case 11 and can be interlocked with the reaping device 1. A vertically installed shaft 15 is provided.

A reaping arm 18 is provided above the housing section 16 of the shaft 15 of the third rotation transmission case 12, into which an arm boss section 17 is rotatably fitted from the outside and a belt interlocking mechanism is installed therein. A case 21 in which a cutting blade shaft 20 of a cutting blade 19 is housed is suspended.

The cutting blade 19 of the reaping device 1 is a rotary cutting blade in the form of several blades 19 provided on the outer periphery of a disk, and is provided at the lower part of the cutting blade shaft 20 together with the ground cover 43 located below it, and the vertically installed cutting blade 19 is It rotates in conjunction with the shaft 15 to the cutting blade shaft 20.

The interlocking mechanism for reciprocating the reaping device 1 from side to side is vertically installed in a worm interlocking case 22 that is integrally provided on one side of the third rotational transmission case 12 and has a worm transmission mechanism installed between it and the shaft 10. A shaft 23 is installed inside, a crank mechanism is provided at the end of this shaft 33,
One end of the crank rod 24 is connected to an arm 26 portion of a swinging metal 25 provided below an arm boss portion 17 rotatably provided with respect to the housing portion 16 of the shaft 15 to form a link,
Arc-shaped metal 27 provided on this swing metal 25
Insert one end of a lock pin 30 provided in a hole 28 provided on a side surface of the reaping arm 18 into a pin guide 29 provided on the boss portion 17 of the reaping arm 18 so as to be able to slide into and out of engagement with the hole 28;
The operation of the swinging metal 25, which rotates back and forth left and right in conjunction with a crank mechanism, is configured to swing left and right in conjunction with the reaping arm 18 and the reaping device 1 provided at its tip via a lock pin 30. Ru.

The lock pin 30 is provided with a lever portion 31, and the lever portion 31 is assembled so as to slide the lock pin 30 along a gate-shaped guide hole 32 provided in the pin guide 29.

Lock pin 30, metal 2 of rocking metal 25
7. In the direction of movement away from the hole 28, a fixed plate 33 whose base is attached to the rotation boss 12
A pin 30 hole is provided in order to fit the other end of the lock pin 30 into the fixing plate 33 to fix the reaping arm 18 in a fixed position relative to the rotary boss 12.

Further, by providing a plurality of holes 28 in the arc-shaped metal 27 provided in the swinging metal 25, the left-right swing range B of the reaping arm 18 can be positioned in front of the front side of the traveling vehicle body 3, or biased to the left or right. It has a switching configuration so that it can be moved and positioned.

A first transmission case 37 is rotated with respect to the boss 34, which has a transmission shaft 36 interlocked with the engine 35 via a clutch mechanism or the like, attached to a driving boss 34 provided at the upper end of the second transmission case so as to protrude rearward. Can be fitted horizontally.

Mounting arm 3 provided integrally with case 37
At 8, a fixed handle 40 having a screw is provided, passing through a seat plate 39 provided to sandwich the guide frame 4 provided on the traveling vehicle body 3 from the front and rear. Further, a handle 41 is provided on the mounting arm 38.

The prime mover 35 has a case 37 in which a transmission shaft 36 is housed.
It is attached to the rear end of the

Reference numeral 42 designates a pin provided on the second transmission case 2 to rotatably support the upper end of the arm 8 for adjusting the lower part of the second transmission case 2 in the left-right direction. One end of the pin 42 is provided to protrude outward from the second transmission case 2 in order to guide the second transmission case 2 to the left or right from the neutral position.

C is a flat surface and D is a slope.

The left and right reciprocating swing mechanism of the reaping device 1 is connected to the arm boss portion 1 of the reaping arm 18, as shown in FIG.
7 may be provided in a vertically elongated shape, and the swinging metal 25 may be rotatably fitted from the outside of this vertically elongated arm boss portion 17.

Furthermore, the fixing plate 33 connects the reaping arm 18 to the vehicle body 3.
In addition to the front side in the forward direction, a plurality of pin holes 30 may be provided so that the pin 30 can be fixed at a position that can be shifted to the left or right.

When the right and left wheels 5 of the traveling vehicle body 3 are positioned on a flat ground C and the grass is to be mowed on the downhill slope N on the right side with respect to the traveling direction A, a fixed handle 40 is fixed to the second transmission case and the guide frame 4 provided on the frame 6. Loosen the screw of the handle 40 while supporting the upper handle 41 with your hand, and loosen the force supporting the upper handle 41 while pulling the protrusion of the pin 42 provided on the second transmission case to the right, or loosen the handle 41. When pressed down, as the arm 8 provided on the frame 6 rotates to the right around the pivot of the boss 9, the mounting arm 38
is guided by the guide frame 4 and lowered, so the second transmission case rotates with respect to the case 37 at the upper driving boss 34 while lowering the transmission shaft 36 while being guided by the guide frame 4. The side transmission shaft 10 can be shifted in the right lateral direction with little vertical deviation. After shifting to an appropriate position, tighten the fixed handle 40 to fix the second transmission case to the guide frame 4, and pull up the fixed pin 13 fixing the third rotation transmission case 12 to the second transmission case. After rotating the transmission case 12 to the right with respect to the case 11 to rotate the rotating surface of the cutting blade 19 of the reaping device 1 to an inclined position along the inclined surface D, the fixing pin 13 is moved by the elastic force of the spring 14. It is fitted into a hole provided in the case 12 using a screwdriver and fixed.

If it is not necessary to swing the reaping device 1 from side to side to reap on this sloped surface, move the lever part 31 of the lock pin 30 provided at the base of the reaping arm 18 along the guide hole 32 of the pin guide 29, and lock the reaping device 1. 30 is inserted into the hole of the fixed plate 33, reaping can be performed without swinging the reaping arm 18. When a plurality of holes in the fixed plate 33 are arranged on the circumference around the vertical shaft 15, which is the center of left-right swing of the reaping arm 26, the reaping device 1 can be moved in the forward direction of the traveling vehicle body 3. Not only can it be fixed in front, but it can also be fixed in a position shifted to the right or left for reaping. The width of the inclined surface D is slightly wider than the cutting width of the cutting device 1,
If the reaping is completed in one reaping process when the locking pin 30 is oscillated from side to side, the locking pin 30 should be
When the metal 27 hole 28 of No. 5 is inserted and engaged, the reaping device 1 swings left and right in conjunction with each other, resulting in a wide reaping width. Furthermore, by appropriately selecting a plurality of metal holes 27 and inserting lock pins 30, the swing range can be shifted to the left or right, so that the grass area to be mowed can be moved to the right or left of the vehicle body 3. It is convenient to be able to adapt the swing range B of the reaping device 1 to the position shown in FIG.

[Brief explanation of drawings]

The figure shows one embodiment of the present invention.
The figure is a plan view with some parts omitted, Figure 2 is a side view of the transmission mechanism, Figure 3 is a front sectional view that can be partially enlarged, Figure 4 is a partial plan view, and Figure 5 is a partial front view. Figure, 6th
7 are front views with some parts omitted. In the figure, 1 is a reaping device, 2 is a second transmission case, 3 is a running vehicle body, 5 is a running wheel, 7 is a control handle, 10 is a transmission shaft, 11 and 12 are third transmission cases, 35 is a prime mover, and 36 indicates a transmission shaft, and 37 indicates a first transmission case.

Claims (1)

[Claims] 1 Vehicle body 3 equipped with running wheels 5 and steering handle 7
In a grass mower in which a prime mover 35 is provided on the top and a reaping device 1 driven by the prime mover 35 is disposed at the front lower part of the vehicle body 3, near the front of the vehicle body 3,
The first transmission case 3 protrudes forward from the prime mover 35
7 and a second transmission case 2 protruding downward from the front end of the first transmission case, and a third transmission case 1 protruding forward from the lower end of the second transmission case 2.
1 and 12, and the second transmission case 2 is provided within the first transmission case 37 so as to be adjustable in angle around the longitudinal axis of the transmission shaft 36 directly connected to the prime mover 35. 12 is installed around the axis of the transmission shaft 10 in the front-rear direction inside the mower so as to be able to adjust the angle freely.