JP2017176154A - Cutting blade part for grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting blade part of a grass mower which is excellent in economical efficiency and convenience.SOLUTION: In a self-propelled grass mower 11 comprising a machine body 12 having a traveling part 21, and a cutting blade part 41 for planar cutting provided at the front part of the machine body 12, a cutting blade guide part 43 is provided on a lower surface side of a rotary cutting blade 42 of the cutting blade part 41, and the cutting blade guide part 43 is relatively rotatable with respect to a rotary shaft of the rotary cutting blade 42 via a bearing and has a bowl-shaped curved surface with respect to an installation surface. Adjustment means 64 of ground pressure during an operation of the cutting blade guide part 43 is provided. The cutting blade part 41 is liftable with respect to the traveling part 21, and the cutting blade guide part 43 is held by a link mechanism 51 that can follow irregularities of a ground contact surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutting blade portion for a mower. Specifically, the worker relates to a cutting blade portion for a self-propelled mower capable of performing mowing work by remote control.

The “multi-face mowing device in a mower” described in Patent Document 1 is “a mowing machine in which a rotary mowing blade 9 for plane mowing is pivoted in front of a machine body on which the prime mover 2 is mounted. The rotary mowing blades 15 and 15 for side mowing are arranged on both lateral sides of the mowing blades so that the vertical position can be changed and the inclination angle can be adjusted, and the mowing blades 15 and 15 for side mowing are respectively connected to the prime mover. "A multi-faceted mowing device in a mower configured to be detachable together with flexible interlocking coupling bodies 21 and 21 that transmit power of 2"("Practical model registration claim").
Therefore, “By removing the side cutting blade bodies 15, 15, this machine can perform a single-side cutting operation with a narrow cutting width of a conventional structure with only the flat cutting blade body 9, as well as the side cutting blade bodies 15, 15. By attaching either one of them, you can cut two surfaces of the flat surface and one slope, which is convenient for cutting the bank and the groove, and by attaching both, you can remarkably expand the width of the flat cutting operation. In addition to significantly improving the efficiency, it is convenient to cut 3 planes on a flat surface and 2 slopes at a time. Even if the height of the side cutting blades 15 and 15 is different, the side cutting blades 15 and 15 can be adjusted by changing the vertical position. Θ can be changed and adjusted. The cutting work on both slopes can be performed reliably and efficiently at the same time. ”(“ Detailed description of the device ”).

The “butterfly mower” described in Patent Document 2 is provided on a machine body (7) having a traveling wheel (4) with a horizontal cutting blade (14) protruding forward along the upper surface (9a), The horizontal cutting blade (14) is provided with an inclined cutting blade (16) inclined along the side surfaces (9b) and (9c) on both left and right sides, and the horizontal cutting blade (14) and the inclined cutting blade (16) are provided. In the case where the engine (2) for driving is mounted, the horizontal cutting blade (14) and the inclined cutting blade (16) are provided at positions displaced from each other in the front-rear direction, and the engine (2) is viewed in a side view. A shoreline mower provided vertically above the traveling wheel (4) or in the vicinity thereof ("Claims").
Therefore, “the horizontal cutting blade and the inclined cutting blade are displaced in the front-rear direction so that there is little interference between the horizontal cutting blade and the inclined cutting blade by changing the inclination angle of the inclined cutting blade. The tilt adjustment range can be made relatively large, and there is an effect that it is possible to deal with more reeds with one reed mower.If the horizontal cutting blade is configured to be adjustable in the front-rear direction, The mowing machine can be stored compactly by storing the horizontal cutting blade on the rear side, while the engine is located above the traveling wheel, so that the weight of the engine is relatively large on the traveling wheel side, so It is also possible to make the vehicle travel stably. ”(“ Effect of the invention ”).

Patent document 3 “Mower with multiple cutting blades” describes that “a plurality of power take-off shafts 2a, 2b,... And a plurality of rotary cutting blades 3a, 3b,... Arranged side by side in front of the traveling machine A are connected by respective refractive supports 4 so that the posture can be changed from a horizontal posture to an inclined posture. The transmission shafts 7a, 7b,... Which are supported by the refraction support 5 and the respective stays 6 and can be refracted and expanded and contracted between the power take-out shafts 2a, 2b,. The mowing machine having a plurality of cutting blades characterized in that each of them is configured to be connected to each other via a transmission line ”(“ claim for utility model registration ”).
Therefore, since “the number of parallel rotary cutting blades 3 a, 3 b,... Can be changed from a horizontal posture to an inclined posture, for example, the portion from the horizontal plane to the inclined surface is mowing at once on the shore side of the field. It is possible to adjust the left and right wheels 1a, 1b up and down even on sloping ground so that the traveling machine A can be operated stably without tilting, and it is suitable for efficient mowing with multiple cutting blades. ("Detailed description of the device").

The “double mowing mower” described in Patent Document 4 has “a cutting blade mechanism 5 for flat mowing and a cutting blade mechanism 8 for slope mowing on the front side of the machine body 1 in the left and right directions when viewed from the front. In a mowing machine for two-sided mowing mounted in parallel, the machine body 1 is provided with an assembling machine frame 6 that rotates up and down around the support shaft S in the front-rear direction, and this is provided around the support shaft W in the up-down direction. A support machine frame 7 that rotates back and forth is supported, and a rotary blade mechanism 80 including a rotary blade 81 having a small diameter and a rotary shaft 82 that rotates the support machine frame 7 is mounted in parallel on the support machine frame 7. A mowing machine for two-sided mowing characterized in that it is a cutting blade mechanism 8 for slope mowing "(Claim 1).
Therefore, “the support machine in which the cutting blade mechanism 8 for slope cutting is supported by the assembling machine frame 6 that rotates up and down around the support shaft S with respect to the machine body 1 so as to rotate back and forth around the support shaft W. Since the rotary blade mechanisms 80 made up of the small-diameter rotary blades 81 are arranged in parallel in the frame 7, the power for driving and rotating the rotary blades 81 can be reduced. Is rotated about the support shaft W and tilted in the front-rear direction at a desired angle, so that the range of action for cutting the grass is expanded and reduced. It is possible to adjust the cutting width of the cutting blade mechanism 8 for slope mowing in response to the change of the slope without increasing the required power. "effect").

  The “mower and cutting blade device” described in Patent Document 5 is “not only a wide cutting of a plane but also a wide cutting of a plane and a slope adjacent to each other at the same time, and there is an obstacle on the slope. Provide a grass cutter and a cutting blade device that can be used as they are and have good workability and handling. "(Summary" "Problem"), "Ride-type traveling machine body (1), and said machine body A plurality of cutting blades (18, 19, 20, 21) arranged in front of (1) in the left-right direction, and a prime mover (11) for driving the plurality of cutting blades (18, 19, 20, 21) And a mower. "(Claim 1").

The “mower” described in Patent Document 6 is “rotating plates 31 and 32 that are driven to rotate by a drive shaft 4 connected to a prime mover, and a plurality of cutting blades 34 provided in the outer peripheral area of the rotating plates 31 and 32. And a ground boss 10a connected to the end of the drive shaft 4 below the rotating disk 32 and contacting the ground to protect the cutting blade 34, and a central boss 10a of the ground protector 1. Is connected to the drive shaft 4 via the bearing mechanism 11 ("Claim 1").
Therefore, “the grounding protector provided on the lower surface can be trimmed without rotating, so that the lower surface is not damaged or worn, and it is not necessary to replace the protector.” Since the grounding protector on the lower surface does not rotate, it is possible to carry out the mowing work with the grounding protector placed on the ground, significantly reducing the labor of the worker and enabling light work. " It has an effect (“effect of the invention”).

The “mowing blade substrate of a mower” disclosed in Patent Document 7 is “the mowing blade substrate of the mower of the present invention is fixed to a mower body that rotates by obtaining the power of a motor or the like and is spaced from the outer periphery by a certain width. A cutting blade substrate having a plurality of cutting blade attachment holes each for attaching a cutting blade, and downwardly extending to the outer periphery outside the cutting blade attachment hole of the cutting blade substrate. The bulging part which bulges around is provided. "(Claim 1").
Therefore, “Because the bulging part that bulges downward to the outer periphery of the cutting blade substrate that is fixed to the rotating mower body that receives power from a motor or the like is provided around, the lower surface of the bulging part is placed on the ground. Since the cutting blade can constantly work while sliding, and the cutting blade constantly has a certain height from the ground, the cutting blade passes over the pebbles near the ground and prevents the pebbles from scattering. ("Action of the invention").

The “mowing machine” described in Patent Document 8 is configured such that the cutting height of the road cutting device 4 can be adjusted by adjusting the vertical position of the front wheel 1 with respect to the traveling vehicle body 3 provided in the traveling vehicle body 3. 4 by switching the slope cutting device 5 up and down around the machine body transverse axis Q to switch to a slanting posture in the longitudinal direction of the machine with respect to the road surface cutting device 4 and cutting height of the slope cutting device 5 The grounding body 51 is attached to the lower end of the rotary drive shaft 33 in the vertical orientation that drives the slope cutting blade 49 of the slope cutting device 5 to the slope cutting apparatus 5. The ground contact surface 51 is formed in a curved surface shape projecting downward in a bowl shape toward the center. ”(“ Summary ”“ Solution means ”).
Therefore, “the cutting height of the cutting device for the slope can be easily changed, and the grass cutting operation can be stably performed by applying the improvement that maintains the changed state by the grounding body. “We were able to provide a mower” (“effect”).

Japanese Utility Model Publication No. 60-85119 JP-A-11-9053 Japanese Utility Model Publication No. 61-77732 JP-A-8-317717 JP 2000-184813 A JP 2005-160443 A Japanese Patent Laid-Open No. 11-98911 JP 2010-273584 A

Patent Document 1 “Multi-faceted mowing device in a mower” has a problem that it is difficult to adopt various inclined postures of the cutting blades between the cutting blades.
In patent document 2 "brush cutting mower", there was a problem that it was difficult to change the positional relationship between the cutting blades. In Patent Document 3 “Mower with multiple cutting blades”, the cutting blade could not be adjusted in the left-right direction.
In patent document 4 “a mower for two-sided mowing”, it is difficult to change the cutting width according to the width of the upper surface of the ridge.
In patent document 5 "mowing machine and cutting blade apparatus", application to the shore weeding was difficult. In Patent Document 6 “Mower”, since the ground contact surface of the ground protector is not a curved surface but a flat surface, the followability to the uneven ground is not excellent, and the traveling resistance of the mower becomes a running resistance. Had.
The “mowing blade substrate of a mower” described in Patent Document 7 and the “mower” described in Patent Document 8 have a problem of increasing the power required for cutting by contact with the ground.

An object of the present invention is to solve these problems, and the lower surface of the ground protector is not damaged or worn, and it is not necessary to replace the ground protector. Furthermore, the excessive fuel consumption required for contact resistance can be reduced, and the mowing work can be performed with the grounding protector placed on the ground, which significantly reduces the labor of the operator and enables light work.
Furthermore, it is not subject to resistance due to rotation from the ground surface, is less susceptible to the steerability of the forward movement of the self-propelled mower, and reduces the required power.
The purpose is to adjust the contact pressure to an optimum level according to the conditions of the cutting field so that the work can be performed with the minimum power, and the cutting blade can follow the field scene and perform cutting with high accuracy.

The cutting blade portion for the mower of the present invention is
An airframe having a traveling section;
In the self-propelled mower with a cutting blade for flat mowing in the front part of the aircraft,
A cutting blade guide part is provided on the lower surface side of the rotary cutting blade of the cutting blade part,
The cutting blade guide portion is rotatable relative to the rotation shaft of the rotary cutting blade via a bearing, and has a bowl-shaped curved surface with respect to the ground surface.

In addition, the cutting blade portion for the mower of the present invention is:
Means for adjusting the ground pressure during the operation of the cutting blade guide is provided.
I will provide a.

In addition, the cutting blade portion for the mower of the present invention is:
The cutting blade portion is movable up and down with respect to the traveling portion, and the cutting blade guide portion is held by a link mechanism that can follow the unevenness of the ground surface.
I will provide a.

According to the present invention, since the ground protector does not rotate, the lower surface is not damaged or worn, and it is not necessary to replace the ground protector. It is extremely excellent in economic efficiency and convenience. Furthermore, the extra fuel required for contact resistance is not consumed. Further, since the ground protector on the lower surface does not rotate, the mowing work can be performed with the ground protector placed on the ground, and the labor of the operator is remarkably reduced, and the light work can be performed.
Furthermore, since the cutting blade guide portion does not rotate, it does not receive resistance due to rotation from the ground contact surface, is not easily disturbed by the steerability of the forward movement of the self-propelled grass mower, and can reduce the required power. Moreover, the resistance of the grounding portion can be minimized by providing a bowl-shaped curved surface with respect to the grounding surface.
When the cutting blade guide portion is provided with means for adjusting the ground pressure during work, the ground pressure can be adjusted to an optimum ground pressure according to the conditions of the cutting field and the work can be performed with minimum power.
When the cutting blade guide portion is held by the link mechanism that can follow the unevenness of the ground contact surface, the cutting blade can follow the field scene and cut accurately.

It is a side view of the plane cutting posture of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a front view of the plane cutting posture of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a rear view of the plane cutting posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a front view of the mowing work state of the state which cuts simultaneously the plane and left-right slope in the shore of the self-propelled mower of the Example which concerns on embodiment of this invention. In the mowing operation of the self-propelled mower of the example according to the embodiment of the present invention, the plane and the right and left slopes are in the state of mowing in the state of simultaneous harvesting, and the left slope is the ascending face, so the left-side harvesting unit FIG. It is a partial cross section top view of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a top view of the state which expanded the central cutting blade and the side cutting blade of the self-propelled grass cutter of the Example which concerns on embodiment of this invention. It is a bottom view of the state illustrated in Drawing 6 of the self-propelled mower of the example concerning an embodiment of this invention. It is a partial cross section side view including the central cutting blade in the horizontal shore of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a partial cross section side view including the central cutting blade in a state where the cutting blade portion is lowered during the cutting operation on the shore of the self-propelled mower of the example according to the embodiment of the present invention. It is a partial cross section side view including the central cutting blade in a state where the cutting blade portion is raised during the cutting operation on the shore of the self-propelled mower of the example according to the embodiment of the present invention. It is a partial cross section side view containing the central cutting blade of the state which raised the cutting blade part during the cutting operation of the self-propelled grass cutter of the Example which concerns on embodiment of this invention. It is a partial back view of the state which raised the left cutting blade most during the cutting operation of the self-propelled grass cutter of the Example which concerns on embodiment of this invention. It is a partial rear view when the left cutting blade is in a horizontal state during the cutting operation of the self-propelled mower of the example according to the embodiment of the present invention. It is a partial rear view of the left-cutting blade downward inclined state during the cutting operation of the self-propelled mower of the example according to the embodiment of the present invention. It is a partial rear view of the left-cutting blade lowest inclined state during the cutting operation of the self-propelled grass cutter of the example according to the embodiment of the present invention. It is a side view showing the operation procedure of a knob volt | bolt during the cutting operation in the shore of the horizontal direction of the advancing direction of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a side view showing the operation procedure of a knob volt | bolt during the mowing operation | work in the pier of the self-propelled grass cutter of the Example which concerns on embodiment of this invention in the advancing direction front fall. It is a plane partial sectional view showing the drive system of the crawler of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a rear view showing the adjustment state of the tread of the left and right crawlers of the self-propelled mower of the example according to the embodiment of the present invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is the schematic of the cutting blade attitude | position of the self-propelled mower of the Example which concerns on embodiment of this invention. It is a schematic side view of the working state of the self-propelled mower of the Example which concerns on embodiment of this invention.

An embodiment according to an embodiment of the present invention will be described with reference to the drawings illustrated in FIGS.
11 is a self-propelled mower according to the embodiment of the present invention. Reference numeral 12 denotes an airframe of the self-propelled mower 11. Reference numeral 13 denotes a driving battery, which is placed on the machine body 12. Reference numeral 14 denotes a control unit, and 15 denotes a main body operation unit. Each is installed in the airframe 12. In FIG. 19, reference numeral 16 denotes a main body frame constituting the body 12.
Reference numeral 21 denotes a traveling unit of the self-propelled mower 11. The traveling unit 21 is provided in the lower part of the body 12. The traveling unit 21 includes a crawler 22 including a left crawler 22a and a right crawler 22b installed in parallel to the traveling direction. The crawler 22 is driven by a drive system 31 illustrated in FIG.

As shown in FIG. 19, the drive system 31 has the following configuration.
The main body frame 16 has a substantially Y-shaped cross section, with the Y-shaped wide portion facing in the traveling direction and the Y-shaped narrow portion facing backward in the traveling direction. A crawler 22 is installed outside the main body frame 16 in the longitudinal direction.
32 is an electric motor. Reference numeral 321 denotes a motor case, 322 denotes a motor rotating shaft, and 323 denotes a nut. The motor case 321 is provided on the outer periphery of the electric motor 32 and houses the electric motor 32. Reference numeral 324 denotes a drive sprocket. The drive sprocket 324 is attached along the outer periphery of the motor case 321 with the motor rotation shaft 322 as the center of rotation.

The motor rotation shaft 322 is attached and fixed by a nut 323 to a wide portion of the main body frame 16 having a substantially Y-shaped cross section at the traveling direction side end and projecting outside the crawler 22.
221 shown in FIG. 19 is a sprocket fitting recess. The sprocket fitting recess 221 is provided in a concave shape inside the crawler 22, that is, on the electric motor 32 side. The drive sprocket 324 is fitted into the sprocket fitting recess 221.
The motor rotation shaft 322 of the electric motor 32 is fixed to the main body frame 16, and when the drive sprocket 324 is fitted in the sprocket fitting recess 221 and the electric motor 32 rotates, the electric motor 32 main body and the drive sprocket 324 rotate. Then, the fitted crawler 22 is driven.
The electric motor 32 is installed so as to be located inside the crawler 22 that is a traveling wheel.

In FIG. 19, 33 is a tension sprocket, 331 is a tension sprocket rotating shaft. The tension sprocket 33 is attached around the tension sprocket rotation shaft 331 using the tension sprocket rotation shaft 331 as a rotation shaft.
The tension sprocket rotating shaft 331 is attached to the narrow end portion of the Y shape, which is the end opposite to the attachment position of the electric motor 32 of the main body frame 16 which is located in the crawler 22 and has a substantially horizontal Y shape. The tension sprocket 33 is a driven sprocket and is fitted in the sprocket fitting recess 221 at the rear end with respect to the traveling direction which is symmetrical to the sprocket fitting recess 221 in which the drive sprocket 324 attached to the electric motor 32 is fitted. And driven by the crawler 22 driven by the electric motor 32.
Reference numeral 34 denotes a tension bolt. The tension bolt 34 urges the tension sprocket 33 toward the sprocket fitting recess 221 in which the tension sprocket 33 is fitted.

Reference numeral 35 denotes a sliding shaft, and 351 denotes a fixed pin. Both ends of the slide shaft 35 are attached and fixed to the right crawler 22b and the left crawler 22a by fixing pins 351, respectively.
The sliding shaft 35 constitutes a tread changing portion A with a fixing pin 351. In the tread changing part A, the tread of the traveling part 21 is changed as shown in FIG. 20 by adjusting the distance between the right crawler 22b located on the right side in the traveling direction and the left crawler 22a located on the left side in the traveling direction. Is possible.
That is, when the sliding shaft 35 inserted into the main body frame sliding pipe 352 slides in the direction of the right crawler 22b and the left crawler 22a, that is, in the width direction, the tread between the right crawler 22b and the left crawler 22a is changed. In this embodiment, the fixing pin 351 is inserted into the hole and fixed, but the sliding shaft 35 may be slid and moved and fixed by a cylinder.

Reference numeral 41 denotes a cutting blade portion for a mower, that is, a cutting blade portion for flat cutting. The cutting blade 41 for plane mowing is provided in the front part of the machine body 12 of the self-propelled mower 11.
Reference numeral 42 denotes a rotary cutting blade. There are three or more rotary cutting blades 42 of the cutting blade portion 41 in the left-right direction, and four in this embodiment. The rotary cutting blade 42 includes a horizontal cutting blade 42a that is a central cutting blade that is arranged in two central positions, and an inclined cutting blade 42b that is positioned on the left and right sides in the traveling direction of the horizontal cutting blade 42a. The inclined cutting blade 42b includes a right cutting blade 42b1 and a left cutting blade 42b2. The inclined cutting blade 42b has a rotation shaft positioned outside the extension line of the left and right widths of the machine body 12.
Reference numeral 46 shown in FIG. 9 denotes a cutting blade. An electric motor 47 is installed for each cutting blade 46 and drives the cutting blade 46. Therefore, the cutting blades 46 of the rotary cutting blade 42 of the cutting blade portion 41 provided in three or more places in the left-right direction can be driven independently.
A cutting blade cover 48 covers the upper portion of the cutting blade 46.

43 is a cutting blade guide part. The cutting blade guide portion 43 is provided on the lower surface side of the rotary cutting blade 42 of the cutting blade portion 41, and is relative to the rotation shaft 44 of the rotary cutting blade 42 via a bearing 45 as shown in FIG. And has a bowl-shaped curved surface with respect to the ground contact surface. The cutting blade guide 43 does not rotate in conjunction with the cutting blade 46.
Since the ground contact surface is a bowl-shaped curved surface, it is easy to run while slipping after cutting grass, and the forward movement of the self-propelled mower is less likely to be disturbed and stable running can be expected.

In FIG. 9, 51 is a link mechanism. The link mechanism 51 illustrated in FIG. 9 relates to the horizontal cutting blade 42a that is a central cutting blade, and has the following configuration.
Reference numeral 52 denotes a first cutting blade holding arm. The base of the first cutting blade holding arm 52 is attached to the body 12 of the self-propelled mower 11.
53 is a 2nd cutting blade holding arm. The base of the second blade holding arm 53 is attached to the side of the cutting blade 41 for flat cutting. Reference numeral 54 denotes a cutting blade left-right rotation axis. The cutting blade left / right rotation shaft 54 is formed in a substantially vertical direction, and connects the tip of the first cutting blade holding arm 52 and the tip of the second cutting blade holding arm 53 to be rotatable in the horizontal direction. Therefore, as shown in FIGS. 6 to 8, the second cutting blade holding arm 53 can be moved horizontally from the first cutting blade holding arm 52 or the machine body 12.

  In FIG. 9, 55 is a stopper pin. Reference numeral 56 denotes a long hole. The long hole 56 is provided on the side surface of the machine body 12 in an arc shape on the rear side in the traveling direction of the first cutting blade holding arm 52. Reference numeral 58 denotes a vertical rotation center. The vertical rotation center 58 is a rotation center for the vertical movement of the first cutting blade holding arm 52 and is attached to the machine body 12 side. 57 is an electric cylinder. The electric cylinder 57 is installed between the two crawlers 22 installed in parallel in the left and right direction in the traveling direction in the center of the machine body 12, and can be expanded and contracted in the traveling direction. The front end of the electric cylinder 57 is fitted in the long hole 56, and moves while being guided by the long hole 56 by the expansion and contraction of the electric cylinder 57.

When the electric cylinder 57 is extended, the tip moves along the long hole 56 to the lower part of the long hole 56 that curves toward the cutting blade portion 41 for the mower. When further extended, the front end side of the first cutting blade holding arm 52 is raised with the vertical rotation center 58 as the rotation center. Then, as shown in FIG. 12, the second cutting blade holding arm 53 is lifted.
On the contrary, when the electric cylinder 57 is contracted, the tip of the electric cylinder 57 is slidable along the long hole 56. That is, the first cutting blade holding arm 52 is in a state of being able to rotate up and down, and the second cutting blade holding arm 53 and the rotary cutting blade 42 connected to the first cutting blade holding arm 52 are in a state of being vertically movable up and down. Therefore, as shown in FIGS. 10 and 11, the cutting blade portion 41 moves up and down following the unevenness of the ground contact surface with which the cutting blade guide portion 43 contacts.
FIG. 10 shows the state when the cutting blade 41 is in the lowest position, and the tip of the electric cylinder 57 is positioned at the lower end of the long hole 56 to prevent the first cutting blade holding arm 52 from rotating downward. .
6 to 8, 59 is a long hole. The ends of the first cutting blade holding arm 52 and the second cutting blade holding arm 53 are positioned in the left-right direction, and bolts are inserted and fixed. When the bolt is released, the first cutting blade holding arm 52 to the second cutting blade holding arm 53 can move in the horizontal direction about the cutting blade left / right rotation shaft 54 as the rotation center, and the cutting blade 46 is moved to the left and right positions. Adjustment is possible.

The first cutting blade holding arm 52 is provided with a ground pressure adjusting means B as shown in FIGS.
On the side surface side of the first cutting blade holding arm 52, a ground pressure adjusting arm 65 that rotates up and down around the vertical rotation center 58 of the first cutting blade holding arm 52 is located on the front side of the first cutting blade holding arm 52. It is provided along. The ground pressure adjusting arm 65 is V-shaped with the opening facing forward, and a stopper pin 55 provided in a horizontal direction perpendicular to the traveling direction at one rotating end located below is a first cutting blade holding arm. It is provided in contact with the lower end surface of 52. A plurality of holes for spring application are provided in the up and down direction on the upper arm portion on the other rotating end side. Also, a ground pressure adjusting mast 66 facing the arm portion and facing upward toward the machine body 12 is provided with a plurality of spring-loaded holes, and the spring-loaded holes include The spring 64 is bridged between the ground pressure adjusting arm 65 side and the ground pressure adjusting mast 66 side. The turning force of the ground pressure adjusting arm 65 is changed depending on the position of the spring 64 in the spring hooking hole. As a result, the rotational force by which the stopper pin 55 provided in contact with the lower end surface of the first cutting blade holding arm 52 lifts the first cutting blade holding arm 52 upward is changed. By changing the rotational force, the ground pressure of the cutting blade portion 41 provided in front is changed. Therefore, the power required for cutting can be reduced without being greatly affected by the resistance of the ground pressure during the operation of the cutting blade guide portion 43.

In the rotation mechanism relationship of the inclined cutting blade 42b, which is the left cutting blade 42b2, shown in FIGS. 13 to 18, 61 is a fixed arm, 62 is a first arm, and 63 is a second arm. The first arm 62 is attached to the machine body 12, and the first arm 62 and the second arm 63 are rotatably attached by a rotation pin 62a. These arms are respectively attached to an inclined cutting blade 42b including a right cutting blade 42b1 and a left cutting blade 42b2.
The fixed arm 61 is provided with three attachment holes 61a, 61b and 61c. By selecting the respective holes and inserting the rotation pins into the first arm 62 and the second arm 63, the bent state of the first arm 62 and the second arm 63 can be selected.
In this embodiment, the mutual position relationship between the first arm 62 and the second arm 63 is adjusted by the fixed arm 61 provided with the three attachment holes 61a, 61b, 61c, but the first arm 62 and the second arm 63 are adjusted. A cylinder may be bridged over and moved and fixed by sliding with the cylinder.

  By selecting the mounting hole of the fixed arm 61 and inserting it into the fixing pins of the first arm 62 and the second arm 63, the inclined cutting blade 42b is fixed in the up position shown in FIG. 13, the horizontal fixed state shown in FIG. 15, the vertical rotation shown in FIG. 16 can be made into a free state.

  In FIGS. 1 and 17, reference numeral 73 denotes a rotating shaft before and after the inclined cutting blade 42b, and 71 denotes a knob bolt. The frame on the side of the inclined cutting blade 42b is connected to the body 12 side by a horizontal and horizontal rotating shaft 73 so as to be able to rotate back and forth (up and down), and provided on the upper portion of the rotating shaft 73, the inclined cutting blade 42b. The knob bolt 71 is screwed into a fixing hole provided in communication with the frame on the side of the machine body 12 and the rotation is fixed. When the knob bolt 71 is removed, the inclined cutting blade 42b is rotatable forward and backward (up and down) about the front and rear rotation shaft 73. By being rotatable, the cutting blade guide portion 43 of the inclined cutting blade 42b is rotated up and down following the grounded surface. When the knob bolt 71 is removed, it is inserted into the knob bolt insertion hole 72 and held.

As shown in the figure, the horizontal cutting blade 42a (center cutting blade) and the sidely inclined cutting blade 42b (right cutting blade, left cutting blade) can be displaced in the left-right direction and can be adjusted in position.
The rotary cutting blades 42 of the cutting blade portions 41 located on the left and right sides can change the inclination angle in the left-right direction as shown in FIGS.
For this reason, since the center two reams the shore L upper surface, all three surfaces of the shore L upper surface and the shore L slope can be reaped in one pass without reciprocation.

1, 3, 6, 7, etc., 14 is a control unit, and 15 is a main body operation unit.
The traveling unit 21 is electrically driven, and the operator D can perform mowing work by remote control.
In the remote operation, as shown in FIG. 27, the operation unit operated by the operator D operates the control unit 14 that controls the operation of the machine body 12 provided in the machine body 12 by a command signal by wireless communication.
Or the operation part which the operator D operates is performed by the operation part connected with the body 12 by wire.

Next, the operation of the self-propelled mower 11 according to the present embodiment will be described. The self-propelled mower 11 takes a plane cutting posture, as shown in a side view in FIG. 1, a front view in FIG. 2, a rear view in FIG. 3, and a schematic front view in FIG. At this time, the rotary cutting blade 42 is a horizontal cutting blade 42a that is a central cutting blade that is arranged in two central positions, and an inclined cutting blade 42b that is positioned on the left and right sides in the direction of travel of the horizontal cutting blade 42a. The blade 42b1 and the left cutting blade 42b2 are installed horizontally on the same plane.
FIG. 6 is a plan view at this time, and FIG. 8 is a bottom view at this time.

As shown in the front view in FIG. 4 and the schematic front view in FIG. 22, in the mowing operation state in which the plane and the left and right slopes of the self-propelled mower 11 are simultaneously cut, the rotary cutting blade 42 is Horizontal cutting blades 42a, which are central cutting blades arranged side by side at two centers, are installed horizontally.
The right cutting blade 42b1 and the left cutting blade 42b2 that are the inclined cutting blades 42b are inclined along the right and left slopes. Hereinafter, the movement of the inclined cutting blade 42b from the horizontal state to the inclined state will be described.
As shown in FIGS. 2 to 5, 13 to 18, and 20, the fixed arm 61 is hung from the cutting blade portion 41 side to the machine body 12 side to attach the mounting hole 61 a, the mounting hole 61 b, and the mounting hole 61 c. The three attachment holes are provided. A rotation pin 62 a is projected from the joint between the first arm 62 and the second arm 63. On the first arm 62, a rotating pin 62 b is projected from the joint with the second arm 63 on the side of the body 12. On the second arm 63, a rotating pin 63b is projected from the joint with the first arm 62 on the cutting blade 41 side.
In the horizontal state before the right cutting blade 42b1 and the left cutting blade 42b2 are inclined along the right and left slopes, the left cutting blade 42b2 takes the state illustrated in FIG. That is, one of the attachment holes 61 a provided on the fixed arm 61 and selected from the three attachment holes 61 a, 61 b and 61 c, which are located at both ends of the fixed arm 61, is the second arm 63. The other attachment hole 61 c is attached to the rotation pin 62 b provided in the first arm 62. The attachment hole 61b is in a free state. Therefore, the first arm 62 and the second arm 63 are positioned and fixed horizontally.

To tilt the right cutting blade 42b1 and the left cutting blade 42b2 along the right and left slopes, the rotation mechanism of the inclined cutting blade 42b having the fixed arm 61, the first arm 62, and the second arm 63 is operated. Let That is, as shown in FIGS. 4, 15, and 16, the first arm 62 attached to the body 12, and the second arm 63 attached rotatably from the first arm 62 by the rotation pin 62 a In between, let the stretchable state.
The mounting hole 61b located in the middle is selected from the three mounting holes 61a, 61b, 61c provided in the fixed arm 61, and the first arm 62, the second arm 63, The rotation pin 62a is inserted and fixed. At this time, the attachment hole 61 a is attached to a rotation pin 63 b provided in the second arm 63. The attachment hole 61c is in a free state. Therefore, the 1st arm 62 and the 2nd arm 63 can rotate freely, and both can take an extended state.

By the way, as illustrated in FIG. 9, the cutting blade guide portion 43 is relatively rotatable via a bearing 45 with respect to the rotation shaft 44 of the rotary cutting blade 42 and has a bowl-shaped curved surface with respect to the grounding surface. Have Therefore, when the knob bolt 71 is removed, the inclined cutting blade 42b is rotatable forward and backward (up and down) about the front and rear rotational shaft 73. By being rotatable, the cutting blade guide portion 43 of the inclined cutting blade 42b is rotated up and down following the grounded surface.
Since the cutting blade guide portion 43 of the inclined cutting blade 42b is in a free state, the inclined cutting blade 42b can be tilted as shown in FIGS. 15 and 16, and follows the grounded surface by its own weight, and against the ground. Become parallel.

As shown in a front view in FIG. 5 and a schematic front view in FIG. 23, in the mowing operation state in which the plane and the left and right slopes at the shore L of the self-propelled mower 11 are simultaneously cut, the left slope is the ascending plane. Therefore, the left cutting blade 42b2, which is the left-side cutting part, is in the highest position. At this time, the rotary cutting blade 42 is horizontally installed with a horizontal cutting blade 42a, which is a central cutting blade positioned in two places in the center.
The left cutting blade 42b2 that is the inclined cutting blade 42b is inclined along the left slope.
As shown in FIGS. 5 and 13, in order to bring the left cutting blade 42 b 2, which is the left-side cutting portion, to the highest position, the inclined cutting blade 42 b having the fixed arm 61, the first arm 62, and the second arm 63. The rotation mechanism is activated. That is, once the fixed arm 61, the first arm 62, and the second arm 63 are fixed, the first arm 62 attached to the airframe 12 and the first arm 62 are rotated as shown in FIG. The second arm 63 that is rotatably attached by the moving pin 62a is brought into a contracted state.

Next, the mounting hole 61b located in the middle is selected from the three mounting holes provided in the fixed arm 61, that is, the mounting hole 61a, the mounting hole 61b, and the mounting hole 61c. 63b is inserted and fixed. The attachment hole 61 c is attached to a rotation pin 62 b provided in the first arm 62. The attachment hole 61a located at the tip is in a free state. The first arm 62 and the second arm 63 are fixed in a contracted state.
Therefore, the cutting blade guide portion 43 of the inclined cutting blade 42b is in the highest position and does not come into contact with the ground.

As shown in FIG. 9 and FIG. 17, the self-propelled mower 11 takes a flat cutting posture on the horizontal shore L.
At this time, the rotary cutting blade 42 is horizontally installed on the same plane as the right cutting blade 42b1 and the left cutting blade 42b2 which are the horizontal cutting blade 42a and the inclined cutting blade 42b.

As shown in FIGS. 10 and 18, in a farm scene where the traveling direction is lowered forward, the rotary cutting blade 42 of the self-propelled grass cutter 11 takes a forward lowered cutting posture.
At this time, the rotary cutting blade 42 is installed so that the horizontal cutting blade 42a and the right cutting blade 42b1 and the left cutting blade 42b2, which are the inclined cutting blades 42b, are forwardly lowered on the same plane.

As shown in the partial cross-sectional side view in FIG. 11, the rotary cutting blade 42 of the self-propelled grass mower 11 takes a forward rising mowing posture in a farm scene where the traveling direction rises forward.
At this time, the rotary cutting blade 42 is installed on the same plane as the right cutting blade 42b1 and the left cutting blade 42b2 which are the horizontal cutting blade 42a and the inclined cutting blade 42b.

  FIG. 13 shows a state in which the left cutting blade 42b2 is raised most during the cutting operation of the self-propelled grass cutter 11. FIG. 14 shows the left cutting blade 42b2 in a horizontal state during the cutting operation of the self-propelled grass cutter 11. In FIG. 15, the left cutting blade 42 b 2 is inclined downward during the cutting operation of the self-propelled grass cutter 11. FIG. 16 shows a state in which the left cutting blade 42b2 is in the lowest inclined state during the cutting operation of the self-propelled grass cutter 11.

FIG. 7 shows that the rotary cutting blade 42 has a horizontal cutting blade 42a that is a central cutting blade, a right cutting blade 42b1 that is an inclined cutting blade 42b, and a left cutting blade 42b2 that are widened in the left and right direction of travel. Is expressed.
FIG. 20 shows the tread adjustment state of the right crawler 22b and the left crawler 22a located on the left and right of the self-propelled mower 11.

According to the self-propelled grass cutter 11 according to the embodiment of the present invention, since the horizontal cutting blade 42a and the inclined cutting blade 42b are displaced in the front-rear direction, the inclination angle of the inclined cutting blade 42b is changed. Therefore, the inclination adjustment range of the inclined cutting blade 42b can be made relatively large, and a single self-propelled mower 11 can cope with more reeds.
Moreover, since the electric motor 32 is located above the crawler 22, the weight of the electric motor 32 is applied to the crawler 22 side at a relatively large ratio, and the self-propelled mower 11 can be stably driven.

The rotary cutting blades 42 can be changed in their respective left and right positions, and the rotary cutting blades 42 located on both the left and right sides have a structure in which the inclination angle in the left and right directions can be changed. The inclined posture of the cutting blade can be obtained. Agricultural fields such as flat surfaces, both downward inclinations, and one side upper inclinations can be cut in one step, and work can be performed efficiently. The working width can also be changed.
Moreover, since the drive of the cutting part is independent, the drive of the cutting blade in the unused state can be stopped. In particular, when working with one or both of the left and right raised upward, the raised cutting blade can be stopped, so that safe work can be performed.

Since the tread of the crawler 22 which is the traveling unit 21 can be changed, it is possible to work in a narrow place, and when traveling on an inclined surface, if the state is wide, the falling angle is improved and safe work can be performed.
Since the crawler which is the traveling unit 21 is not driven by the engine but is driven electrically, the noise and vibration are small, and the operator can be remotely operated. It is difficult to be affected by scattering of foreign matter, etc., and comfortable work can be performed. Moreover, since it is not necessary to operate the handle for the operation, the burden on the operator's body is reduced and the labor is reduced.

  According to the cutting blade portion 41 for a mower according to the embodiment of the present invention, the cutting blade guide portion 43 that is a ground protector does not rotate together with the cutting blade 46, so that the lower surface is not damaged or worn. Therefore, it is not necessary to replace the cutting blade guide portion 43 that is a grounding protector. It is extremely excellent in economic efficiency and convenience. Furthermore, the extra fuel required for contact resistance is not consumed. And since the grounding protector on the lower surface does not rotate, it is possible to perform the mowing work with the cutting blade guide 43 that is the grounding protector placed on the ground, significantly reducing the labor of the operator and enabling light work And

Furthermore, since the cutting blade guide part 43 does not rotate, it does not receive resistance due to rotation from the ground contact surface, is not easily disturbed by the steerability of the forward movement of the self-propelled grass mower 11, and can reduce the required power. Moreover, the resistance of the grounding portion can be minimized by providing a bowl-shaped curved surface with respect to the grounding surface.
Since the cutting blade guide portion 43 is provided with the ground contact pressure adjusting means B at the time of work, the work can be performed with the minimum power by adjusting to the optimum ground pressure according to the conditions of the cutting field.
When the cutting blade guide portion 43 is held by the link mechanism 51 that can follow the unevenness of the installation surface, the cutting blade can follow the field scene and cut with high accuracy.

DESCRIPTION OF SYMBOLS 11 Self-propelled mower 12 Airframe 14 Control part 15 Operation part 21 Traveling part 41 Mowing blade part for plane mowing (mowing blade part for mowing machines)
42 Rotary Cutting Blade 43 Cutting Blade Guide 51 Link Mechanism 64 Spring B Adjusting Means

Claims (3)

An airframe having a traveling section;
In the self-propelled mower with a cutting blade for flat mowing in the front part of the aircraft,
A cutting blade guide portion is provided on the lower surface side of the rotary cutting blade of the cutting blade portion,
The cutting blade guide part is relatively rotatable via a bearing with respect to the rotating shaft of the rotary cutting blade, and has a bowl-shaped curved surface with respect to the ground surface.
A cutting blade portion for a mower characterized by that. A means for adjusting the ground pressure during operation of the cutting blade guide part is provided,
A cutting blade portion for a mower according to claim 1. The cutting blade portion is movable up and down with respect to the traveling portion, and the cutting blade guide portion is held by a link mechanism that can follow the unevenness of the grounding surface.
A cutting blade portion for a mower according to any one of claims 1 and 2.

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