JP3218273B2 - Row mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ridge mowing machine provided with a plane cutting blade and a slope cutting blade, and more particularly, a ridge which can expand a cutting width of a slope in accordance with a slope width of a work site. The present invention relates to a lawn mower.

[0002]

2. Description of the Related Art Conventionally, a mowing machine for a ridge is provided with a plane cutting blade rotating along an upper surface of a substantially horizontal ridge and a slope cutting blade rotating along a slope of a downwardly inclined ridge. It is known that one of the prime movers rotates the two cutting blades (see Japanese Patent Application Laid-Open No. 5-30837).

In the conventional ridge mower, a driving pulley provided on an output shaft of the motor and a pulley provided on a rotating shaft of the flat cutting blade are linked by a belt, and the rotation of the flat cutting blade is further increased. A transmission belt is suspended between a pulley separately provided on the shaft and a pulley provided on the rotation shaft of the slope cutting blade, and the length of the transmission belt changes depending on the inclination of the slope cutting blade. A tension roller is pressed against the transmission belt.

[0004]

In the conventional ridge mowing machine having a flat blade and a slope blade as described above, the slope blade can be adjusted to the inclination angle of the slope of the ridge. The cutting width is the minimum required constant size corresponding to the most common slope size, and cannot be applied when the slope width is wider than the set cutting width. In other words, when the slope width is wider than the rotation diameter of the slope cutting blade, uncut portions are left on the slope, and it is necessary to cut the uncut portions manually or by other means later.

As a countermeasure against this, it is conceivable to increase the size of the slope cutting blade in advance. However, each member such as a cutting blade cover becomes large, the body becomes heavy, operability is poor, and furthermore, the slope width is reduced. In a narrow ridge, the cutting blade is stuck at the lower end of the slope, making it practically impossible to work and is not practical.

The present invention is directed to a ridge mower equipped with a flat cutting blade and a slope cutting blade, which eliminates the above-mentioned disadvantages and can be used even when the slope width is wider than a predetermined rotation diameter of the slope cutting blade. It is an object of the present invention to provide a ridge mower capable of performing efficient mowing work.

[0007]

In order to solve the above-mentioned problems, the present invention is directed to a tilting portion having a slope cutting blade on a side of a horizontal traveling portion having a plane cutting blade and a motor, and the tilting portion having a tilting blade which moves up and down around a pivot axis. in furrow for mower that is swingably supported, furthermore, the outer portion of the tilting portion, keeping the slope face cutting blade in the same mowing plane receives the power transmission from the rotary shaft of the slopes cutting blade rotation appendixes having a drive shaft of the sub blades is obtained by a structure which is provided detachably.

[0008]

According to the present invention, an outside of the tilting portion Y of a mowing machine for ridges in which a single prime mover 2 rotationally drives a flat cutting blade 1 provided on a horizontal traveling portion X and a slope cutting blade 3 provided on a tilting portion Y is provided. An additional portion having a drive shaft 56 of a sub-blade 50 that rotates while receiving power from the rotating shaft 3a of the slope cutting blade 3 while maintaining the same mowing plane as the slope cutting blade 3 is detachably provided at the portion. The mowing work can be performed efficiently even when the slope width is wider than the predetermined rotation diameter of the slope cutting blade 3 as well as the conventional normal use.

That is, when the slope width is wider than the rotation diameter of the slope cutting blade 3, if the additional portion Z having the drive shaft 56 of the sub-blade 50 is mounted and used, the uncut portion is left on the slope. There is no need to manually cut the remaining uncut portion later by other means.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a schematic plan view of a mowing machine for ridges according to an embodiment of the present invention, FIG. 2 is a front view of a main part viewed from the direction of the arrow II in FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a perspective view showing an example of a conventional ridge mower.

The ridge mower shown in FIG. 5 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 like. It has a tilting portion Y having a slope cutting blade 3, and the tilting portion Y is supported on the left rear 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 vehicle. Have been. In the figure, 4 is a front guide wheel, 5 is a rear drive wheel, and 6 is an operation handle.

[0012] In one embodiment of the present invention shown in FIGS. 1 to 4, the outer portion of the tilting portion Y, keeping the slope face cutting blade 3 and the same mowing plane, the rotary shaft 3a of該法surface cutting blade 3 Portion Z having a drive shaft 56 of the sub-blade 50 which rotates by receiving power from the sub-blade 50 and has a rotation diameter of about half the rotation diameter of the slope cutting blade 3.
Are provided detachably.

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

Further, a driving pulley 16 fixed to an output shaft 2a projecting downward from the motor 2 and a cutting blade cover 27 of a rotating shaft 1a of the flat cutting blade 1 parallel to the output shaft 2a. A first belt 18 is loosely wound around a first pulley 17 fixed to an upper end protruding upward, and a rotatable tension roller 19 disposed outside the first belt 18 is used to rotate the first belt 18. The first belt 18 is configured to be displaceable in a direction in which a predetermined tension for power transmission is applied to the first belt 18 and a direction in which the tension is released to interrupt power transmission. The power transmission to the flat cutting blade 1 is performed.

That is, the tension roller 19 is
A configuration in which the rocking lever 21 that constitutes the cutting blade clutch 20 is rotatably provided at a rocking end thereof, and the rocking lever 21 is operated by operating a cutting blade clutch lever 22 attached to the operation handle 6. It has become.

Next, 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.

In the embodiment shown in FIG. 1, as shown in FIG. 1, a support rod 39, a locking support rod 40 and a pivot axis O--O projecting leftward from the horizontal traveling portion X are provided. By the rotation support rod 41 provided from the matched transmission shaft 26,
The tilting portion Y is supported so as to be tiltable up and down.

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

The locking support rod 40 has a base 40a fixed to the horizontal traveling portion X, a pin 42 protruding forward by a spring at an outer end 40b, and a cover for the slope cutting blade 3. An appropriate number of angle adjustment holes (not shown) raised on the upper surface of the 29 portion are formed on an arc centered on the pivot axis O--O in a predetermined hole of the rising piece 43.
Is adapted so that mowing can be performed while maintaining the required tilting state.

The rotation support rod 41 has its base 4
1a is rotatably supported by the transmission shaft 26 via a bearing 44, and an outer end 41b is fixed to the tilting portion Y, that is, the cover 29 of the slope cutting blade 3.

In the above configuration, as shown in FIG. 2, the transmission shaft 26 is set to the pivot axis OO, and the locking by the pin 42 is released, so that the tilted portion Y can be used as the slope of the ridge. Mowing work can be performed while floating up and down along the road.

Further, as shown in FIG. 1 and FIG. 4, the transmission shaft 26 is bridged between the horizontal traveling portion X and the tilting portion Y, and a first bevel gear 24 is attached to both ends of the transmission shaft 26. And a second bevel gear 25.

That is, a cover-2 in which the front end of the transmission shaft 26 faces the first bevel gear 24 covers the flat cutting blade 1.
The second bevel gear 25 is rotatably supported by bearings 28 on the upper surface of the second shaft 7 at the rear end of the transmission shaft 26.
The side is rotatably supported by a bearing 30 on the upper surface of a cover 29 that covers the slope cutting blade 3.

Next, the first bevel gear 24 at the front end of the transmission shaft 26 has a horizontal running portion X, specifically, a first bevel gear 24 supported on the upper surface of the cover 27 of the flat cutting blade 1. A three-bevel gear 31 is meshed from above, and the second bevel gear 25 at the rear end of the transmission shaft 26 is provided with the tilting portion Y, specifically, the cover-2 of the slope cutting blade 3.
The fourth bevel gear 32 supported on the upper surface of the nine parts meshes from above.

Further, a second pulley 33 and a third pulley 34 are fixedly provided at the upper ends of the rotating shafts 31a and 32a of the third bevel gear 31 and the fourth bevel gear 32, respectively.

The second pulley 33 of the second pulley 33 and the third pulley 34 on the side of the cover 27 of the flat cutting blade 1 is adapted to rotate the flat cutting blade 1. A fourth pulley fixed coaxially to the upper end of the shaft 1a separately from the first pulley 17;
It is provided with the same height as the rib 35, and the second belt 36 is wound between them.

A third belt 38 is wound between the third pulley 34 and a fifth pulley 37 provided at the upper end of the rotating shaft 3a of the slope cutting blade 3. In the figure, 45 is a bearing, 46 is a traveling clutch lever, and 47 is an auxiliary wheel.

In the above construction, the pin 42 of the locking support rod 40 is pulled out rearward and once removed from the angle adjusting hole provided in the upstanding piece 43, and the tilting portion Y is set at an angle corresponding to the slope of the ridge. After adjusting the tilt, the pin 42 can be adapted to the hole corresponding to the position and the desired tilt angle can be maintained and used. However, as described above, the tilt portion Y can be set to an arbitrary angle. Even when the tilt adjustment is performed, the state of power transmission to the slope cutting blade 3 does not change, and the slope cutting blade 3 can be smoothly rotated.

That is, as shown in FIG. 2, when the tilting portion Y, that is, the slope cutting blade 3 and its cover 29 are tilted up and down, the cover 29 shown in FIG. The fourth bevel gear 32 supported on the upper surface
However, the power transmission system is merely displaced while being engaged with the second bevel gear 25 provided at the rear end of the transmission shaft 26, so that no unreasonable power transmission system occurs.

Therefore, the cutting blade clutch lever 22
By operating the cutting blade clutch 20 and applying a predetermined tension required for power transmission to the first belt 18 by the tension roller 19, the driving pulley 16 is applied to the first pulley 17 from the driving pulley 16. Power is transmitted, and the plane cutting blade 1 and the fourth pulley 35 coaxial with the first pulley 17 are integrally rotated.

Further, the rotation of the fourth pulley 35 is transmitted to the second pulley 33 supported on the upper surface of the cover 27 of the flat cutting blade 1 via the second belt 36, It is transmitted to the third bevel gear 31 on the axis of the rotating shaft 31a. Further, the rotation of the third bevel gear 31 is transmitted to the first bevel gear 24 provided at the front end of the transmission shaft 26 meshing with the third bevel gear 31,
The transmission shaft 26 is rotated.

At the same time, the second bevel gear 25 provided at the rear end of the transmission shaft 26 is integrally rotated, and the rotation of the second bevel gear 25 is engaged with the second bevel gear 25 to cover the slope cutting blade 3. The fourth bevel gear 32 supported on the upper surface of the 29 portion is rotated.

Further, the fourth bevel gear 32 is rotated.
When it is turned, on the axis of the rotation shaft 32a of the fourth bevel gear 32
The third pulley 34 at the end is rotated integrally. So
Then, the rotation of the third pulley 34 is applied to the third belt 38.
Therefore, it is transmitted to the fifth pulley 37 and the slope cutting blade 3
Is rotated.

In this embodiment, as shown in FIGS. 1, 2 and 3, the same mowing plane as that of the slope cutting blade 3 is maintained on the outer side of the inclined portion Y. Axis of rotation 3
driving of the sub blades 50 that rotates by receiving power transmission from a
An additional portion Z having a moving shaft 56 is provided detachably.

Hereinafter, the configuration of the additional portion Z will be described.

As shown in FIG. 3, first, the slope cutting blade 3
Between the fifth pulley 37 of the rotating shaft 3a and the slope cutting blade 3, an additional first bevel gear 51 is attached to the rotating shaft 3a in a gear box 53 fixed to the lower surface of the cutting blade cover 29. And are provided integrally. In the figure, reference numeral 52 denotes a bearing for supporting the rotating shaft 3a vertically.

Further, the additional first bevel gear 51 is provided in the gear box 53 in a direction outward of the tilted portion Y.
An additional second bevel gear 54 meshing at right angles with the shaft is rotatably supported by a bearing 55. Further, an insertion connection hole 57 for the drive shaft 56 of the sub-blade 50 is provided at the center of the additional second bevel gear 54. The connection between the insertion connection hole 57 and the drive shaft 56 is a spline connection that can be inserted and removed.

In the drawing, reference numeral 58 denotes a support rod for covering the drive shaft 56, and an outer end of the support rod 58 has an additional gear box having substantially the same structure as that of a conventional cutting blade of a brush cutter. 59 are provided.

The support rod 58 includes, from its inner end side, an outer peripheral wall of the cutting blade cover 29, a bracket 67 fixedly mounted on an inner surface of the cutting blade cover 29, a cover 66 of the gear box 53, and a gear box. 53 are inserted into the insertion support holes 29a, 67a, 66a and 53a respectively formed in the insertion support holes 53, and are fixed by appropriate means.

The outer end of the drive shaft 56 is inserted and connected to an insertion connection hole 62 of an additional third bevel gear 61 supported by a bearing 60 in the additional gear box 59. Preferably, the connection between the insertion connection hole 62 and the outer end of the drive shaft 56 is also a spline connection. Further, the additional third bevel gear 61 is meshed with an additional fourth bevel gear 63 provided integrally with the sub-blade rotating shaft 50 a in the additional gear box 59.

In the drawing, reference numeral 64 denotes the sub-blade rotating shaft 50.
a for supporting the upper and lower sides of the support rod 58;
Is a fixing portion for inserting and fixing an outer end portion of the fixing device.

[0042] Further, the detachable structure of the additional portion Z having a sub-blade 50 is fixed to the support rod 58 at the appropriate means provided in the 29 parts of the cover of the law Menkariha 3
By releasing the drive of the support rod 58, the additional gearbox 59, and the sub blade 50 and the sub-blades 50 provided inside the support rod 58 provided at the outer end of the support rod 58 This is performed by pulling out the shaft 56 integrally and separating it from the tilting portion Y.

That is, the inner end of the drive shaft 56 spline-connected to the insertion connection hole 57 of the additional second bevel gear 54 is pulled out from the insertion connection hole 57 of the additional second bevel gear 54, and It is separated from the cutting blade 3. In this case, at least the gear box 53 and the insertion support hole 29a of the cutting blade cover 29 need to be closed, so that, for example, after the additional portion Z is separated, it has the same outer diameter as the support rod 58. Then, instead of the support rod 58, a tube material having a length up to the outer peripheral wall of the cutting blade cover 29 whose outer end is closed is inserted, and each of the insertion support holes 2 is inserted.
9a, 67a, 66a, and 53a may be closed.

The additional portion Z in the above configuration is replaced with the tilting portion Y
The power transmission from the rotation shaft 3a of the slope cutting blade 3 to the sub-blade 50 when it is mounted on the outside of the slope cutting blade 3 is integrated with the rotation shaft 3a of the slope cutting blade 3. Additional first bevel gear 51 provided in the
An additional second bevel gear 54 meshed with 1; a drive shaft 56 spline-connected to the additional second bevel gear 54;
An additional third bevel gear 61 connected to the outer end of the drive shaft 56, an additional fourth bevel gear 63 meshed with the additional third bevel gear 61, and a rotating shaft 50 of the sub-blade 50.
a.

The support rod 58 and the drive shaft 56
May be made telescopic, so that the additional cutting width of the sub-blade 50 can be adjusted within a range where an appropriate overlap L can be left between the slope cutting blade 3 and the sub-blade 50.

[0046]

According to the present invention, in a ridge mower equipped with a plane cutting blade and a slope cutting blade, the slope width is not limited to the conventional working condition as in the prior art, but the slope width is the rotation diameter of the slope cutting blade. Even in a wider case, the same mowing machine for ridges enables efficient mowing work.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a row mower according to an embodiment of the present invention.

FIG. 2 is a front view of a main part viewed from an arrow II of FIG. 1;

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a perspective view showing an example of a conventional ridge mower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plane cutting blade 2 Prime mover 3 Slope cutting blade 3a Rotating shaft 50 Sub-blade OO pivot axis X Horizontal running part Y Tilt part Z Additional part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 60-85119 (JP, U) Japanese Utility Model Showa 60-147212 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A01D 34/63-34/90

Claims (1)

(57) [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 motor (2) is provided with a pivot axis (OO). The mowing machine for ridges which is supported so as to be able to swing up and down around the slope, further comprising maintaining the same mowing plane as the slope cutting blade (3) on the outer side of the tilting portion (Y). Rotary axis (3a) of blade (3)
Of the sub-blade (50) rotating by receiving power transmission from the
Appendixes having a drive shaft (56) (Z) is, ridge for mower characterized by comprising detachably provided.