JPH0951710A - Slope cutting blade structure for ridge mowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slope cutting blade structure for a ridge mowing machine having a compact structure capable of extending the width of a cutting at the slope and preventing the entanglement of mown weeds, etc., and having an improved operability by installing a supplemental cutting blade capable of being rotated so as to overlap in the upper direction of a slope cutting blade in the outside part of the slant moving part. SOLUTION: This slope cutting blade structure for a ridge mowing machine is constituted by supporting a slant moving part Y having a slope cutting blade 3 capable of rocking freely up and down centering around a pivoting axis line, in the side part of a horizontal traveling part having a horizontal plane cutting blade and a motor, and installing a supplemental cutting blade 50 rotated so as to overlap in the upper direction of the slope cutting blade 3 in the outside part of the slant moving part Y. Further, it is preferable to install a sixth pulley 51 integrally rotating coaxially around a rotating shaft 3a between a fifth pulley 37 provided at the top end part of the rotating shaft 3a of the slope cutting blade 3 and the upper surface of a cover 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ridge mower equipped with a plane cutting blade and a slope cutting blade, which is capable of widening the slope of the slope with a compact structure and is capable of cutting grass and the like. It is also possible to prevent the slope of the slope cutting blade from being entangled with the rotary shaft.
A slope cutting blade structure of a ridge mower.

[0002]

2. Description of the Related Art Conventionally, a mower for ridges has a flat cutting blade which rotates along the upper surface of a substantially horizontal ridge and a slope cutting blade which rotates along the slope of a ridge having a downward slope. It is known that one mounted prime mover rotates and drives both cutting blades (see Japanese Patent Laid-Open No. 5-30837).

In the ridge mower having the above structure, generally, the cutting width of each of the plane cutting blade and the slope cutting blade provided on the rear side of the flat cutting blade is set to a predetermined size and driven to rotate. There is.

Further, the horizontal traveling portion having the plane cutting blade and the tilting portion having the slope cutting blade are provided, for example, between the rotation axis of the plane cutting blade and the rotation axis of the slope cutting blade before and after the machine body. It is supported so as to be vertically swingable with a transmission shaft interposed as a pivot shaft extending in the direction as an angle adjustment fulcrum.

[0005]

When a ridge mower having the above-mentioned plane cutting blade and slope cutting blade is used to mow the ridge, the plane cutting blade is provided along the upper surface of the substantially horizontal ridge. Horizontal rotation, the slope cutting blade is swung to fit along the downward slope of the slope of the ridge and tilted and rotated, but in order not to leave uncut residue on the upper surface and slope of the ridge. It is necessary to overlap the orbits of the plane cutting blade and the slope cutting blade. That is, when viewed from the front-back direction of the aircraft,
As shown in FIG. 3, the flat cutting blade 1 and the slope cutting blade 3 are brought into a crossed state. As a result, there is a problem that the actual cutting width W of the slope cutting blade becomes smaller than the slope cutting blade rotation diameter D.

Therefore, it is conceivable to enlarge the slope cutting blade in advance, but in that case, not only the slope cutting blade but also each member such as a cutting blade cover must be enlarged, There is a problem in that the machine body becomes heavy and the operability is poor, and further, a large amount of power is required, which makes it expensive.

Further, during the above-mentioned mowing work, the mowed grass or the like may be entangled with the rotary shaft of the cutting blade, resulting in inconvenience in operability and a problem in working efficiency.

The present invention has been made in view of the above circumstances, and in a ridge mower having a flat cutting blade and a slope cutting blade, it is possible to widen the effective cutting width of the slope cutting blade with a compact structure. (EN) Provided is a slope cutting blade structure for a ridge mower that can prevent grass from being entangled with the rotary shaft of the slope cutting blade, and can perform efficient grass cutting work. With the goal.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a tilting portion having a slope cutting blade on the side of a horizontal traveling portion having a plane cutting blade and a prime mover moves up and down about a pivot axis. In a ridge mower that is swingably supported, an auxiliary cutting blade that is rotated so as to overlap above the slope cutting blade is provided on the outer side of the tilted portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of an example of a ridge mower having an auxiliary cutting blade structure for a slope cutting blade according to the present invention,
FIG. 2 is a sectional view of a main part taken along the line II-II in FIG. 1, and FIG. 3 is a rear view of a conventional example showing an overlapping state of a plane cutting blade and a slope cutting blade.

The ridge mower shown in FIG. 1 has a horizontal traveling portion X having a strip-shaped plane cutting blade 1 and a prime mover 2 including an air-cooled gasoline engine, and the same strip-shaped method as the plane cutting blade 1. It has a tilting portion Y having a chamfering blade 3, and the tilting portion Y
Is supported at the rear of the left side portion of the horizontal traveling portion X so as to be vertically swingable about a pivot axis OO extending in the longitudinal direction of the machine body. In the figure, 4 is a front guide wheel, 5 is a rear drive wheel,
Reference numeral 6 is an operation handle.

As shown in the drawings, the auxiliary cutting blade 50 is rotated by receiving power from the rotary shaft 3a of the slope cutting blade 3 at the outer side (left end) of the tilting portion Y.
Is provided.

First, the horizontal traveling portion X and the tilting portion Y
Is described. As shown in FIG. 1, the rear drive wheel 5 includes the drive motor 2, the propeller shaft 7, the transmission 8, the sprocket 10 provided on the output shaft 9 of the transmission 8, and the deceleration sprockets 11 and 12. , 13 and a deceleration chain 14, 14a.

Further, from a driving pulley 16 fixedly mounted on an output shaft 2a projecting downward from the motor 2, and a cutting blade cover 27 of a rotary shaft 1a parallel to the output shaft 2a of the flat cutting blade 1. The first belt 18 is loosely wound around the first pulley 17 fixed to the upper end portion protruding upward, and the rotatable tension roller 19 arranged outside the first belt 18 is It is configured to be displaceable in a direction in which it is pressed against one belt 18 to give a predetermined tension for power transmission to the first belt 18 and a direction in which the tension is released to cut off power transmission. Power is transmitted to the plane cutting blade 1. That is,
The tension roller 19 is rotatably provided at a swing end of a swing lever 21 that constitutes the cutting blade clutch 20,
The swing lever 21 is configured to be operated by operating a cutting blade clutch lever (not shown) attached to the operation handle 6.

Next, the tilting portion Y is supported swingably in the vertical direction behind the left side portion of the horizontal traveling portion X.
In the embodiment shown in the drawings, a support rod 39 protruding outward from the horizontal traveling portion X to the left, a locking support rod 40, and a rotation support rod provided from a transmission shaft 26 portion that coincides with the pivot axis OO. Four
1, the tilting portion Y is supported so as to be tiltable up and down.

The base rod 39a of the support rod 39 is fixed to the left rear portion of the horizontal traveling portion X, and the outer end portion 39b thereof is provided.
Serves as a fulcrum, and supports the tilting portion Y, specifically, the cover 29 portion of the slope cutting blade 3 so as to be vertically tiltable.

The base 40a of the locking support rod 40 is fixed to the horizontal traveling portion X, and the outer end 40b is provided with a pin 42 protruding forward by a spring. The cover 42 of the slope cutting blade 3 is provided. The pin 42 is provided in a predetermined hole of the upright piece 43 having a proper number of angle adjusting holes (not shown) upright on the upper surface of the 29th part on an arc centered on the pivot axis OO.
By adapting the above, it is possible to mow work while maintaining the required tilting state.

The rotation support rod 41 has a base portion 4
1a is rotatably supported by the transmission shaft 26 via a bearing (not shown), and the outer end portion 41b is fixed to the tilted portion Y, that is, the cover 29 portion of the slope cutting blade 3. There is.

In the above structure, if the transmission shaft 26 is set to the pivot axis O--O and the lock by the pin 42 is released, the tilted portion Y floats up and down along the slope of the ridge. You can do the mowing work while letting it.

Further, the transmission shaft 26 is bridged between the horizontal traveling portion X and the tilting portion Y, and the transmission shaft 26 is provided.
The front end side of the cover 27 is rotatably supported on the upper surface of the cover 27 part that covers the plane cutting blade 1 through a bevel gear (not shown), and the rear end part of the cover 29 part of the slope cutting blade 3 is provided. Similarly, it is rotatably supported on the upper surface via a bevel gear (not shown). A rotary shaft 31 of a bevel gear (not shown) meshed with the front end of the transmission shaft 26.
The second pulley 33 is fixedly mounted on the upper end of the shaft of the
A third pulley 34 is fixed to the rear end of the rotating shaft 32 of a bevel gear (not shown) meshing with each other at the rear end of the rotating shaft 32.

Of the second pulley 33 and the third pulley 34, the second pulley 33 on the cover 27 portion side of the plane cutting blade 1 is the rotation of the plane cutting blade 1. A fourth pulley fixed to the upper end of the shaft 1a coaxially with the first pulley 17
The height is the same as that of the belt 35, and the second belt 36 is wound between them. Also, the third pulley 3
The third belt 38 is wound between the fourth pulley 4 and the fifth pulley 37 provided on the upper end of the rotary shaft 3a of the slope cutting blade 3.

In the figure, 47 is an auxiliary wheel, whose rear end is fixed to the upper surface of the cover 29 of the slope cutting blade 3, and a shaft is attached to the front end of a support member 48 extending to the front side of the machine body. It is rotatably supported.

In the ridge mower having the above structure, the cutting blade clutch 20 is operated by a cutting blade clutch lever (not shown) attached to the operation handle 6 to move the tension roller.
When a predetermined tension necessary for power transmission is applied to the first belt 18 by the la 19, the driving pulley 16 causes the first pulley to move.
Power is transmitted to the reel 17, and the plane cutting blade 1 and the fourth pulley 35 coaxial with the first pulley 17 are rotated integrally. Then, the rotation of the fourth pulley 35 is transmitted via the second belt 36 to the second pulley 33 supported on the upper surface of the cover 27 portion of the plane cutting blade 1, and the rotation shaft thereof. The rotation of 31 is transmitted to the front end portion of the transmission shaft 26 via a bevel gear (not shown), and the transmission shaft 26 is rotated.

Further, simultaneously with the rotation of the front end portion of the transmission shaft 26, the rear end portion of the transmission shaft 26 is integrally rotated, and the rotation thereof is performed by the bevel gear (not shown) through the slope cutting blade 3
The third pulley 34 supported on the upper surface of the cover 29 of
Is transmitted to the rotary shaft 32, and the third pulley 34 at the upper end of the rotary shaft 32 is integrally rotated. Then, the rotation of the third pulley 34 is transmitted to the fifth pulley 37 by the third belt 38, the rotation shaft 3a thereof is rotated, and the slope cutting blade 3 is rotated. Has become.

In the present embodiment, as shown in FIGS. 1 and 2, the tilting portion Y, specifically, the outside of the cover 29 of the slope cutting blade (the left end) is provided with the slope cutting blade 3. Rotating shaft 3
An auxiliary cutting blade 50 that rotates by receiving power transmission from a is provided.

First, the fifth pulley 37 provided on the upper end of the rotary shaft 3a of the slope cutting blade 3 and the cover 29.
A sixth pulley 51 that is coaxial with the rotating shaft 3a and rotates integrally with the upper surface is provided.

Next, a rotary shaft 50a is rotatably supported at the outer end of the cover 29 so as to extend vertically through the cover 29 in parallel with the rotary shaft 3a of the slope cutting blade 3.

A seventh pulley 52 is integrally provided at the upper end of the rotary shaft 50a at the same height as the sixth pulley 51, and the seventh pulley 52 and the seventh pulley 52 are integrally formed. Six Pulley 5
The fourth belt 53 is wound around the first belt 53.

Further, at the lower end of the rotary shaft 50a,
An auxiliary cutting blade 50 that rotates integrally with the rotary shaft 50a is provided. The auxiliary cutting blade 50 is provided above the slope cutting blade 3 so as to overlap with the slope cutting blade 3.

Further, it is preferable that the rotary orbit of the tip portion of the auxiliary cutting blade 50 is provided at a position close to the rotary shaft 3a of the slope cutting blade 3.

In the figure, reference numeral 54 is a cutting blade cover for covering the auxiliary cutting blade 50 provided on the outer end of the cover 29.
If the auxiliary cutting blade 50 is composed of a nylon cord cutter, only soft grass can be cut,
It is possible to mow the rice paddy without damaging the rice.

Power transmission to the auxiliary cutting blade 50 having the above structure is
Via a sixth pulley 51, a fourth belt 53, a seventh pulley 52, and a rotary shaft 50a integrated with the seventh pulley 52, which are integrally provided on the rotary shaft 3a of the slope cutting blade 3. Is done.

The mowing work by the ridge mower according to the embodiment of the present invention having the above structure is no different from the conventional ridge mower having a slope cutting blade. That is, the transmission shaft 26 is tilted with the pivot axis OO as an angle adjustment fulcrum, and the tilting portion Y, specifically, the slope cutting blade 3 and the auxiliary cutting blade 50 are tilted downward to match the slope of the ridge. Just do it. As a result, the slope cutting blade 3
Even in the case where the slope width of the ridge is wider than the effective cutting width W, it is possible to deal with it because the approximate radius of rotation of the auxiliary cutting blade 50 is increased as the additional cutting width W ′.

Further, the auxiliary cutting blade 50 is the slope cutting blade 3
The grass cut by the flat cutting blade 1 or the slope cutting blade 3 because it is rotated so as to overlap above the
Even when the grass or the like that has been cut by the entanglement with the rotary shaft 3a of the slope cutting blade 3 is cut by the auxiliary cutting blade 50, the entanglement of the slope cutting blade 3 with the rotary shaft 3a can be prevented. The work efficiency can be improved.

The effect of preventing tangling of grass or the like on the rotary shaft 3a of the slope cutting blade 3 is the slope cutting blade 3 and the auxiliary cutting blade 50.
It can be improved by changing the rotation speed of. For that purpose, it is only necessary to change the size (diameter) of the sixth pulley 51 and the seventh pulley 52.

Further, as shown in FIG. 1, it is preferable that all the cutting blades 1, 3 and 50 are clockwise in a plan view so that the cutting grass does not fall under the ridges.

[0037]

According to the present invention, in a ridge mower having a plane cutting blade and a slope cutting blade, the effective cutting width of the slope cutting blade can be widened and cut with a compact structure. It is also possible to prevent the slope cutting blade of grass or the like from being entangled with the rotary shaft, and to perform efficient grass cutting work.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an example of a ridge mower having an auxiliary cutting blade structure for a slope cutting blade according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a rear view of a conventional example showing an overlapping state of a plane cutting blade and a slope cutting blade.

[Explanation of symbols]

 1 plane cutting blade 2 prime mover 3 slope cutting blade 50 auxiliary cutting blade OO pivot axis X horizontal traveling part Y tilting part

Claims (1)

[Claims] 1. A tilting part (Y) having a slope cutting blade (3) on the side of a horizontal traveling part (X) having a plane cutting blade (1) and a prime mover (2) has a pivot axis (OO). ), A supplementary cutting blade that is rotated so as to overlap with the outside of the tilting portion (Y) above the slope cutting blade (3). A slope cutting blade structure for a ridge mower, which is provided with (50).