JP6699021B2 - Cutting blade for mower - Google Patents

Description

  The present invention relates to a cutting blade part for a mower. More specifically, the present invention relates to a cutting blade part for a self-propelled mower, which allows a worker to remotely mow the grass.

The "multi-faced mowing device in a mowing machine" described in Patent Document 1 is a "mowing machine in which a rotary cutting blade body 9 for plane cutting is mounted in front of a machine body equipped with a prime mover 2, The side cutting rotary cutting blades 15, 15 are arranged so that the vertical position can be changed and the tilt angle can be changed, and the side cutting rotary cutting blades 15, 15 can be respectively attached to the prime mover. The multi-faced mowing device in a mower configured to be detachable together with the flexible interlocking coupling bodies 21 and 21 for transmitting the power of 2. (Practical model registration claim range).
Therefore, "By removing the side surface cutting blades 15 and 15, this machine can perform a single surface cutting work with a narrow cutting width of the conventional structure of only the flat surface cutting blade body 9 and, of course, both side surface cutting blade bodies 15 and 15. By attaching either one of them, it is possible to perform two-sided cutting work on a flat surface and one slope, which is convenient for cutting banks and ditches, and by installing both of them, the width of the plane cutting work can be significantly expanded. The efficiency is remarkably improved, and it is convenient because it is possible to mow three planes, one flat and two slopes at a time.Especially, when this machine is used for mowing ridges, ridges with different upper plane widths and field scenes and ridge tops are used. The ridges with different heights can be adjusted by adjusting the vertical position of the side cutting blades 15 and 15, and moreover, the inclination angle Θ of the side cutting blades 15 and 15 against the change in the inclination angle of both slopes. Θ can be changed and adjusted, and the cutting work on the upper plane of the ridge and both slopes can be performed reliably and efficiently at the same time” (“Detailed description of the device”).

The "ridge-edge mower" described in Patent Document 2 is provided on a machine body (7) equipped with traveling wheels (4) with a horizontal cutting blade (14) protruding forward along the ridge upper surface (9a). The inclined cutting blades (16) inclined along the ridge side surfaces (9b), (9c) are provided on both right and left sides of the horizontal cutting blade (14), and the horizontal cutting blade (14) and the inclined cutting blade (16) are provided. In a vehicle equipped with an engine (2) for driving, 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 seen in a side view. Edge mowers provided vertically above or in the vicinity of the traveling wheels (4)." (Claims).
Therefore, "Because the horizontal cutting blade and the inclined cutting blade are provided so as to be displaced in the front-rear direction with respect to each other, there is little interference between the horizontal cutting blade and the inclined cutting blade due to the change of the inclination angle of the inclined cutting blade. There is an effect that the tilt adjustment range of can be set to a relatively large range and one ridge-edge mower can handle more ridges. The horizontal mower can be compactly stored by storing it on the rear side.On the other hand, since the engine is located above the traveling wheels, the weight of the engine is applied to the traveling wheels at a relatively large ratio, and the ridge mower is located. There is also an effect that the vehicle can be stably driven.” (“Effect of invention”).

Patent document 3 "Mowing machine having multiple cutting blades" discloses that a plurality of power take-off shafts 2a, 2b,... Are projected at the front part of a traveling main body A having left and right wheels 1a, 1b each of which can be vertically adjusted. A plurality of rotary cutting blades 3a, 3b,..., which are installed side by side in front of the traveling main unit A in the lateral direction, are connected by the respective bending support rods 4 so that each of the rotary cutting blades 3a, 3b,. Each power take-off shaft 2a, 2b,... and each rotary cutting blade 3a, 3b.. Can be bent and extended by being supported and installed by a bending support rod 5, each stay 6, etc., and each transmission shaft 7a, 7b.. "A lawn mower having multiple cutting blades, characterized in that they are each transmission-coupled through"("Claims for utility model registration").
Therefore, "it is possible to change the posture of a plurality of parallel rotary cutting blades 3a, 3b... From a horizontal posture to an inclined posture. It is possible to adjust the left and right wheels 1a and 1b up and down even on a sloping ground so that the traveling machine A can be stably operated without tilting, and it is possible to mow the grass efficiently with multiple cutting blades. Can be carried out” (“Detailed description of the device”).

The "two-sided mowing machine" described in Patent Document 4 has a "cutting blade mechanism 5 for plane cutting and a cutting blade mechanism 8 for slope cutting on the front side of the machine body 1 to the left and right in front view. In a double-sided mowing machine mounted side by side, the machine body 1 is provided with an assembling machine frame 6 that rotates up and down around a support shaft S in the front-rear direction, and in this, a support frame W in the up-down direction is installed in the center. 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 blade is mounted in parallel on the support machine frame 7 in multiple rows. The cutting blade mechanism 8 for slope cutting is used as a cutting surface.
Therefore, "a support machine in which the cutting blade mechanism 8 for slope cutting is mounted on the assembly machine frame 6 that rotates up and down with respect to the machine body 1 about the support shaft S so as to rotate back and forth about the support shaft W. Since the rotary blade mechanisms 80... Consisting of 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. By rotating the swivel centering around the support shaft W and inclining it in the front-back direction at a desired angle, the action width for mowing the grass expands or contracts, so the width of the slope (high It is possible to adjust the cutting width of the cutting blade mechanism 8 for slope cutting in response to the change in the height, without increasing the required power. effect").

  The "mowing machine and the cutting blade device" described in Patent Document 5 is capable of "not only wide-cutting a plane but also wide-cutting a plane and a slope adjacent to each other at the same time, and moreover, there is an obstacle on the slope. A mowing machine and a cutting blade device which can be used as they are and which are excellent in workability and handleability.” (“Summary” “Issue”), “Passenger traveling machine body (1) and the machine body” A plurality of cutting blades (18, 19, 20, 21) arranged side by side in the left-right direction in front of (1), and a prime mover (11) for driving the plurality of cutting blades (18, 19, 20, 21). And a mower." ("Claim 1").

The "mowing machine" described in Patent Document 6 is "a rotary disk 31, 32 that is 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 rotary disk 31, 32. And the ground protector 1 that is connected to the end of the drive shaft 4 below the turntable 32 and that contacts the ground and protects the cutting blade 34, the central boss portion 10a of the ground protector 1 Is connected to the drive shaft 4 via the bearing mechanism 11.” (“Claim 1”).
Therefore, "because the ground protector provided on the lower surface can be mowed without rotating, the lower surface is not damaged or worn, and it is not necessary to replace the protector." Since the grounding protector on the bottom surface does not rotate, it is possible to mow the grounded protector while it is on the ground, significantly reducing the labor of the operator and enabling light work.” It is said to have an effect ("effect of invention").

The "cutting blade substrate of the mowing machine" described in Patent Document 7 is "The cutting blade substrate of the mowing machine of the present invention is fixed to the main body of the mowing machine which rotates by the power of a motor or the like, and has a constant width from the outer periphery. A cutting blade substrate having a plurality of cutting blade attachment holes for attaching cutting blades, each of which has a downwardly outer periphery outside the cutting blade attachment hole of the cutting blade substrate. A bulging part that bulges around is provided."("Claim1").
Therefore, "Because the bulging part that bulges downward to the outer periphery of the cutting blade substrate fixed to the main body of the mower that rotates with the power of the motor etc. is installed, the lower surface of the bulging part is placed on the ground. You can mow the work while sliding it, and since the cutting blade constantly has a certain height above the ground, the cutting blade passes over pebbles near the ground to prevent pebbles from scattering. It is said that ("action of invention").

The "mowing machine" described in Patent Document 8 is configured such that "the cutting height of the road surface cutting device 4 can be adjusted by adjusting the vertical position of the front wheels 1 provided in the travel device body 3 with respect to the travel device body 3. 4, the slope cutting device 5 is vertically swung around the machine laterally-oriented axis Q to switch the slope cutting device 4 to the machine front-rear tilting posture, and the cutting height of the slope cutting device 5 is changed. The grounding body 51 is attached to the lower end of the rotation drive shaft 33 in the vertical posture for driving the slope cutting blade 49 of the slope cutting device 5 to the slope cutting device 5. The ground contact surface of 51 is formed in a curved shape that protrudes downward in a bowl shape toward the central portion."("Summary","Solutionmeans").
Therefore, "the cutting height of the cutting device for the slope can be easily changed, and the improvement of maintaining the changed state by the grounding body enables stable cutting of the slope. 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 JP, 11-98911, A JP, 2010-273584, A

Patent Document 1 "Multi-faced mowing device in a mowing machine" has a problem that it is difficult to take various inclined attitudes of the cutting blades.
In patent document 2 "edge mower", it was difficult to change the positional relationship between the cutting blades. In Patent Document 3 "Mowing machine having multiple cutting blades", the cutting blades cannot be adjusted in the left-right direction.
In Patent Document 4 "Mowing machine for two-sided cutting", it was 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 Device", it was difficult to apply to ridge weeding. In Patent Document 6 "Mower", the grounding surface of the grounding protector is not a curved surface but a flat surface, so that it does not have excellent followability to uneven ground and causes traveling resistance when the mower moves forward. Had.
The "cutting blade substrate of a mowing machine" described in Patent Document 7 and the "mowing machine" described in Patent Document 8 have a problem that required power for mowing is increased by contact with the ground.

An object of the present invention is to solve these problems, and to prevent the lower surface of the ground protector from being damaged or worn and to eliminate the need to replace the ground protector. Further, the extra fuel consumption required for contact resistance can be reduced, and the work can be performed with the ground protector placed on the ground, and the labor of the worker can be remarkably reduced and the light work can be performed.
Further, it does not receive resistance due to rotation from the ground contact surface, is less likely to be hindered by the steerability of forward movement of the self-propelled mower, and reduces required power.
The purpose is to adjust the ground pressure to the optimum value 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 the cutting accurately.

The cutting blade for the mower of the present invention is
An aircraft having a running part,
In a self-propelled mower equipped with a cutting blade for plane cutting on the front of the machine,
In the cutting blade part, a first cutting blade holding arm tip having a base attached to the machine body and a second cutting blade holding arm tip having a base attached to the cutting blade side are horizontally rotatably connected,
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 portion is rotatable relative via a bearing with respect to the rotation axis of the rotating cutting blade, have a bowl-shaped curved surface with respect to the ground plane,
An arcuate elongated hole is provided on the rear side of the first cutting blade holding arm on the machine body side, and a vertical rotation center that is attached to the machine body and is vertically rotatable is provided.
Since the tip of the electric cylinder installed in the center of the machine body is slidable along the elongated hole, the second cutting blade holding arm and the rotary cutting blade can move up and down, and the cutting blade The guide part follows the installation surface,
I will provide a.

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

In addition, the cutting blade for the mower of the present invention,
The cutting blade part is movable up and down with respect to the traveling part, and the cutting blade guide part is held by a link mechanism that can follow the unevenness of the ground contact 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 economical and convenient. Furthermore, the extra fuel required for contact resistance is not consumed. Further, since the grounding protector on the lower surface does not rotate, the grounding protector can be used for mowing work with the grounding protector placed on the ground, which significantly reduces the labor of the worker and enables light work.
Furthermore, since the cutting blade guide portion does not rotate, it does not receive resistance due to rotation from the ground contact surface, is less likely to hinder the steerability of the forward movement of the self-propelled grass mower, and reduces the required power. Further, since the bowl-shaped curved surface is provided with respect to the ground surface, the resistance of the ground portion can be minimized.
When the cutting blade guide unit is provided with a ground pressure adjusting means at the time of working, the ground pressure can be adjusted to an optimum ground pressure according to the conditions of the mowing field, and the work can be performed with minimum power.
When the cutting blade guide 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 perform accurate cutting.

It is a side 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 plane cutting posture of the self-propelled grass 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 which is the state which simultaneously cuts the plane and the left and right slopes on the ridge of the self-propelled mower of the example according to the embodiment of the present invention. The left reaper is a left reaper because the plane and left and right slopes on the ridge of the self-propelled mower according to the embodiment of the present invention are in a mowing operation state in which the left slope is an upslope. [Fig. 4] is a front view in the highest position. 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 mower of the Example which concerns on embodiment of this invention. FIG. 7 is a bottom view of the self-propelled mower of the example according to the embodiment of the present invention in the state shown in FIG. 6. It is a partial cross-sectional side view containing the central cutting blade in the horizontal ridge of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a partial cross-sectional side view containing the central cutting blade in the state where the cutting blade part was descended during the mowing operation on the ridge on the front side in the traveling direction of the self-propelled mower of the embodiment according to the present invention. It is a partial cross-section side view containing the central cutting blade in the state where the cutting blade part was raised during the mowing operation on the ridge on the front side in the traveling direction of the self-propelled mower of the embodiment according to the present invention. It is a partial cross-sectional side view containing the central cutting blade in the state which raised the cutting blade part most during the mowing work of the self-propelled grass mower of the example which concerns on embodiment of this invention. It is a partial rear view of the state where the left cutting blade is raised to the maximum during the mowing work of the self-propelled mower of the example according to the embodiment of the present invention. It is a partial rear view when the left cutting blade is made into a horizontal state during the mowing work of the self-propelled grass mower of the example which concerns on embodiment of this invention. It is a partial rear view of a left cutting blade inclining downward during a mowing operation of a self-propelled grass mower according to an embodiment of the present invention. It is a partial rear view of the left cutting blade lowermost inclination state during the reaping work 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 the knob bolt during the mowing work on the ridge in the horizontal direction of the traveling direction of the self-propelled mower of the example according to the embodiment of the present invention. It is a side view showing the operation procedure of the knob bolt during the mowing work on the ridge on the front side in the traveling direction of the self-propelled mower according to the embodiment of the present invention. It is a plane partial cross-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 right and left crawlers of the self-propelled mower of the example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass mower of the Example which concerns on embodiment of this invention. It is a schematic diagram of the cutting blade posture of the self-propelled grass 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 shown in FIGS. 1 to 27.
Reference numeral 11 is a self-propelled mower according to the embodiment of the present invention. Reference numeral 12 is a machine body of the self-propelled mower 11. A driving battery 13 is mounted on the machine body 12. Reference numeral 14 is a control unit, and 15 is a main body operation unit. Each is installed in the airframe 12. In FIG. 19, reference numeral 16 is a main body frame forming the machine body 12.
Reference numeral 21 is a traveling unit of the self-propelled mower 11. The traveling unit 21 is provided below the machine body 12. The traveling unit 21 has 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 the drive system 31 shown in FIG.

The drive system 31, as shown in FIG. 19, has the following configuration.
The body frame 16 has a substantially lateral Y-shaped cross section, and a wide Y-shaped portion faces the traveling direction, and a narrow Y-shaped portion faces rearward in the traveling direction. The crawler 22 is installed on the outer side in the longitudinal direction of the body frame 16.
32 is an electric motor. 321 is a motor case, 322 is a motor rotating shaft, and 323 is 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 is 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 portion of the main body frame 16 having a substantially Y-shaped cross section at the end in the traveling direction, which is wide and protrudes outside the crawler 22.
Reference numeral 221 shown in FIG. 19 is a sprocket fitting recess. The sprocket fitting concave portion 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 in the sprocket fitting recess 221.
The motor rotation shaft 322 of the electric motor 32 is fixed to the main body frame 16, the drive sprocket 324 is fitted in the sprocket fitting recess 221, and when the electric motor 32 rotates, the main body of the electric motor 32 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 which is a traveling wheel.

Reference numeral 33 shown in FIG. 19 denotes a tension sprocket and 331 denotes a tension sprocket rotating shaft. The tension sprocket 33 is attached around the tension sprocket rotating shaft 331 with the tension sprocket rotating shaft 331 as a rotating shaft.
The tension sprocket rotating shaft 331 is attached to the Y-shaped narrowed end that is the end opposite to the electric motor 32 attachment position of the body frame 16 that is positioned 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 a position symmetrical to the sprocket fitting recess 221 in which the drive sprocket 324 attached to the electric motor 32 fits. And the crawler 22 driven by the electric motor 32 is driven.
34 is a tension bolt. The tension bolt 34 urges the tension sprocket 33 toward the sprocket fitting recess 221 into which the tension sprocket 33 is fitted.

Reference numeral 35 is a sliding shaft, and 351 is a fixed pin. Both ends of the sliding shaft 35 are attached and fixed to the right crawler 22b and the left crawler 22a by fixing pins 351.
The sliding shaft 35 is a fixed pin 351 and constitutes a tread changing portion A. In the tread changing section A, the tread of the running section 21 is changed as shown in FIG. 20 by adjusting the interval 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. It is possible.
That is, when the sliding shaft 35 inserted in the body frame sliding pipe 352 slides in 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 and fixed in the hole, but the sliding shaft 35 may be slid and moved and fixed by a cylinder.

41 is a cutting blade for a mower, that is, a cutting blade for plane cutting. The cutting blade part 41 for plane cutting is provided in the front part of the machine body 12 of the self-propelled mower 11.
42 is a rotary cutting blade. The rotary cutting blades 42 of the cutting blade portion 41 are provided at three or more places in the left-right direction, and four places in this embodiment. The rotary cutting blade 42 includes a horizontal cutting blade 42a, which is a central cutting blade arranged side by side at two central positions, and an inclined cutting blade 42b 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 axis located outside the extension line of the left and right widths of the machine body 12.
Reference numeral 46 shown in FIG. 9 is 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 at three or more positions in the left-right direction can be independently driven.
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 relative to the rotary shaft 44 of the rotary cutting blade 42 via a bearing 45, as shown in FIG. It is rotatable and has a bowl-shaped curved surface with respect to the ground contact surface. The cutting blade guide part 43 does not rotate together with the cutting blade 46.
Since the ground contact surface is a bowl-shaped curved surface, it is easy to travel while sliding after cutting grass, and it does not hinder the forward movement of the self-propelled grass mower, and stable driving can be expected.

In FIG. 9, reference numeral 51 is a link mechanism. The link mechanism 51 illustrated in FIG. 9 relates to the horizontal cutting blade 42a that is the central cutting blade, and has the following configuration.
52 is 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 grass mower 11.
Reference numeral 53 is a second cutting blade holding arm. The base of the second cutting blade holding arm 53 is attached to the side of the cutting blade 41 for plane cutting. Reference numeral 54 denotes a cutting blade left/right rotating shaft. 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 so as to be horizontally rotatable. Therefore, as shown in FIGS. 6 to 8, the second cutting blade holding arm 53 can be horizontally moved from the first cutting blade holding arm 52 or the machine body 12.

  In FIG. 9, 55 is a stopper pin. 56 is 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 is the center of vertical rotation. The vertical rotation center 58 is the rotation center of 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 two crawlers 22 installed in the center of the machine body 12 in parallel with each other in the left-right direction toward the traveling direction, and is expandable and contractable in the traveling direction. The tip of the electric cylinder 57 is fitted into the long hole 56, and the electric cylinder 57 expands and contracts to be guided and moved by the long hole 56.

When the electric cylinder 57 is extended, the tip moves along the elongated hole 56 to the lower portion of the elongated hole 56 that curves toward the cutting blade portion 41 side for the mower. When it is 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.
Conversely, when the electric cylinder 57 is contracted, the tip of the electric cylinder 57 is slidable along the elongated hole 56. That is, the first cutting blade holding arm 52 is vertically rotatable, and the second cutting blade holding arm 53 and the rotary cutting blade 42 connected to the first cutting blade holding arm 52 are vertically movable. Therefore, as shown in FIGS. 10 and 11, the cutting blade portion 41 moves up and down following the irregularities of the ground contact surface with which the cutting blade guide portion 43 is in contact.
FIG. 10 shows the state where the cutting blade part 41 is at the lowest position, and the tip of the electric cylinder 57 is located at the lower end of the elongated hole 56 to prevent the first cutting blade holding arm 52 from rotating downward. ..
In FIGS. 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 fixing of 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 around the cutting blade left/right rotation shaft 54 as a rotation center, and the left and right positions of the cutting blade 46 can be obtained. It can be adjusted.

As shown in FIGS. 9 to 12, the first cutting blade holding arm 52 is provided with a ground pressure adjusting means B.
On the side surface 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 provided on the front side of the first cutting blade holding arm 52. It is provided along. The ground pressure adjusting arm 65 has a V-shape with an opening facing forward, and has a stopper pin 55 provided at one rotating end located on the lower side in a horizontal direction orthogonal to the traveling direction as a first cutting blade holding arm. It is provided in contact with the lower end surface of 52. A plurality of holes for spring engagement are provided in the up-down direction in the arm portion facing upward, which is the other rotation end side. Further, a ground pressure adjusting mast 66 facing the arm portion and facing upward toward the machine body 12 is also provided upright with a plurality of spring hooking holes provided therein, and the spring hooking 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 hole for spring application. As a result, the turning force of the stopper pin 55 provided in contact with the lower end surface of the first cutting blade holding arm 52 to lift the first cutting blade holding arm 52 upward is changed. By changing the turning power, the ground pressure of the cutting blade portion 41 provided in the front is changed. Therefore, the required power for cutting can be reduced without being significantly 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 attached to an inclined cutting blade 42b including a right cutting blade 42b1 and a left cutting blade 42b2, respectively.
The fixed arm 61 is provided with three mounting holes 61a, 61b and 61c. By selecting each hole and inserting the rotation pin 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 positional relationship between the first arm 62 and the second arm 63 is adjusted by the fixed arm 61 provided with the three mounting holes 61a, 61b, 61c, but the first arm 62 and the second arm 63 are adjusted. Alternatively, the cylinder may be bridged over and slid by the cylinder to be moved and fixed.

  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 in the uppermost fixed state shown in FIG. 13, the horizontal fixed state shown in FIG. The vertical rotation shown in FIGS. 15 and 16 can be freely set.

  In FIG. 1 and FIG. 17, 73 is a rotary shaft in front of and behind the inclined cutting blade 42b, and 71 is a knob bolt. The frame on the side of the inclined cutting blade 42b is rotatably connected to the side of the machine body 12 by a rotating shaft 73 in the horizontal direction so as to be rotatable forward and backward (up and down), and is provided above the rotating shaft 73. The knob bolt 71 is screwed into a fixing hole provided so as to communicate with the side frame and the machine body 12 side to fix the rotation. When the knob bolt 71 is removed, the inclined cutting blade 42b can be rotated back and forth (up and down) about the front and rear rotation shafts 73. By being freely rotatable, the cutting blade guide portion 43 of the inclined cutting blade 42b rotates 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 inclined cutting blades 42b (right cutting blade, left cutting blade) located laterally are positionally adjustable by displacing each other in the left-right direction.
The rotary cutting blades 42 of the cutting blade portion 41 located on both the left and right sides can change the inclination angle in the left and right direction as shown in FIGS. 4 and 5.
Therefore, as for the upper surface of the ridge L, since the center two reams perform mowing, it is possible to mow all three of the upper surface of the ridge L and the slope of the ridge L in one pass without reciprocating work.

In FIG. 1, FIG. 3, FIG. 6, FIG. 7, etc., 14 is a control unit, and 15 is a main body operation unit.
The traveling unit 21 is electrically driven, and the worker D can perform grass cutting 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 provided on the machine body 12 for controlling the operation of the machine body 12 by a command signal by wireless communication.
Alternatively, the operation unit operated by the worker D is performed by the operation unit connected to the machine body 12 by wire.

Next, the operation of the self-propelled mower 11 according to this embodiment will be described. As shown in a side view of FIG. 1, a front view of FIG. 2, a rear view of FIG. 3, and a schematic front view of FIG. At this time, the rotary cutting blade 42 is a horizontal cutting blade 42a that is a central cutting blade that is located side by side at two central positions, and an inclined cutting blade 42b that is located on the left and right sides in the traveling direction of the horizontal cutting blade 42a. The blade 42b1 and the left cutting blade 42b2 are horizontally installed 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 work state in which the plane and the left and right slopes on the ridge L of the self-propelled mower 11 are simultaneously mowed, the rotary cutting blade 42 is Horizontal cutting blades 42a, which are central cutting blades arranged side by side at two central positions, are installed horizontally.
The right cutting blade 42b1 and the left cutting blade 42b2, which are the inclined cutting blades 42b, are inclined along the left and right slopes. The movement of the inclined cutting blade 42b from the horizontal state to the inclined state will be described below.
As shown in FIG. 2 to FIG. 5, FIG. 13 to FIG. 18, and FIG. 20, the fixed arm 61 is hung from the cutting blade portion 41 side to the machine body 12 side, and the mounting hole 61a, the mounting hole 61b, and the mounting hole 61c. 3 mounting holes are provided. A pivot pin 62a is provided in a protruding manner at a joint between the first arm 62 and the second arm 63. On the first arm 62, a turning pin 62b is provided so as to protrude from the joint with the second arm 63 toward the machine body 12 side. On the second arm 63, a turning pin 63b is provided so as to protrude from the joint with the first arm 62 toward the cutting blade 41 side.
In the horizontal state before the right cutting blade 42b1 and the left cutting blade 42b2 are tilted along the left and right slopes, the left cutting blade 42b2 takes the state shown in FIG. That is, one mounting hole 61 a located at both ends of the fixed arm 61 is selected from the three mounting holes of the mounting hole 61 a, the mounting hole 61 b, and the mounting hole 61 c provided in the fixed arm 61, and the one mounting hole 61 a is located at both ends of the second arm 63. Is attached to a turning pin 63b provided on the first arm 62, and the other attachment hole 61c is attached to a turning pin 62b provided on the first arm 62. The mounting hole 61b is in a free state. Therefore, the first arm 62 and the second arm 63 are horizontally positioned and fixed.

In order to tilt the right cutting blade 42b1 and the left cutting blade 42b2 along the left and right 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, a first arm 62 attached to the machine body 12 and a second arm 63 rotatably attached from the first arm 62 with a rotation pin 62a. In between, let the stretchable state.
The mounting hole 61b located in the middle is selected from the three mounting holes of the mounting hole 61a, the mounting hole 61b, and the mounting hole 61c provided in the fixed arm 61, and the first arm 62 and the second arm 63 are The turning pin 62a is inserted and fixed. At this time, the attachment hole 61 a is attached to the rotation pin 63 b provided on the second arm 63. The mounting hole 61c is in a free state. Therefore, the first arm 62 and the second arm 63 can freely rotate, and both can take an extended state.

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

As shown in the front view in FIG. 5 and the schematic front view in FIG. 23, in the mowing work state in which the plane and the left and right slopes on the ridge L of the self-propelled mower 11 are simultaneously mowed, the left slope is an upslope. Therefore, the left cutting blade 42b2, which is the left cutting unit, is in the highest position. At this time, the rotary cutting blade 42 is horizontally installed with the horizontal cutting blade 42a, which is a central cutting blade located at two central positions side by side.
The left cutting blade 42b2, which is the inclined cutting blade 42b, is inclined along the left slope.
As shown in FIG. 5 and FIG. 13, in order to bring the left cutting blade 42b2, which is the left cutting portion, to the highest position, the inclined cutting blade 42b having the fixed arm 61, the first arm 62, and the second arm 63 is provided. To activate the rotating mechanism. That is, the fixing of the fixed arm 61, the first arm 62, and the second arm 63 is temporarily released, and as shown in FIG. 5, the first arm 62 attached to the machine body 12 and the first arm 62 are rotated. With the second arm 63 rotatably attached by the moving pin 62a, the contracted state is obtained.

Next, the mounting hole 61b located in the middle is selected from the three mounting holes of the mounting hole 61a, the mounting hole 61b, and the mounting hole 61c provided in the fixed arm 61, and the rotation pin of the second arm 63 is selected. Insert and fix 63b. The attachment hole 61c is attached to the rotation pin 62b provided on the first arm 62. The mounting 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 is not grounded.

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

As illustrated in FIG. 10 and FIG. 18, in a field scene in which the direction of travel is lowered to the front, the rotary cutting blade 42 of the self-propelled grass mower 11 is in the front-falling mowing posture.
At this time, the rotary cutting blade 42 is installed on the same plane as the horizontal cutting blade 42a and the inclined cutting blades 42b, that is, the right cutting blade 42b1 and the left cutting blade 42b2, in a front-down direction.

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

  FIG. 13 shows a state in which the left cutting blade 42b2 is fully raised during the mowing work of the self-propelled grass mower 11. FIG. 14 shows the left cutting blade 42b2 in a horizontal state during the mowing operation of the self-propelled grass mower 11. In FIG. 15, the left cutting blade 42b2 is tilted downward during the mowing operation of the self-propelled mower 11. FIG. 16 shows the left cutting blade 42b2 in the lowermost inclined state during the mowing work of the self-propelled mower 11.

As shown in FIG. 7, the rotary cutting blade 42 has a horizontal cutting blade 42a that is a central cutting blade, and a right cutting blade 42b1 and a left cutting blade 42b2 that are inclined cutting blades 42b in a state in which the width in the traveling direction is widened. Represents
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 mower 11 according to the embodiment of the present invention, since the horizontal cutting blade 42a and the inclined cutting blade 42b are provided so as to be displaced in the front-rear direction, the inclination angle of the inclined cutting blade 42b is changed. There is little interference with the horizontal cutting blade 42a, and the inclination adjustment range of the inclined cutting blade 42b can be made relatively large, so that one self-propelled grass mower 11 can handle more ridges.
Further, 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 run.

Since the rotary cutting blades 42 can change their respective lateral positions, and the rotary cutting blades 42 located on the left and right sides have a structure in which the inclination angle in the horizontal direction can be changed, the rotary cutting blades 42 have various mutual positional relationships. The cutting blade can be inclined. It is possible to mow a flat surface, both downward slopes, one side upward slopes, etc. in one step, which enables efficient work. The working width can also be changed.
Further, since the driving of the cutting unit is independent, the driving of the cutting blade when not in use can be stopped. In particular, when working with one or both of the left and right sides raised, the raised cutting blade can be stopped, so that safe work can be performed.

Since the tread of the crawler 22 that 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 that is the traveling unit 21 is driven by electric power rather than being driven by an engine, there is little noise and vibration, and since an operator can remotely operate it, he/she can work away from the self-propelled mower 11 to some extent, and dust and It is not affected by the scattering of foreign substances, and you can work comfortably. Further, since it is not necessary to operate the handle for the operation, the burden on the operator's body is small and it contributes to light labor.

  According to the mowing blade portion 41 for the mowing machine according to the embodiment of the present invention, the cutting blade guide portion 43 that is the ground protector does not rotate together with the cutting blade 46, so that the lower surface is not damaged or worn. It is no longer necessary to replace the cutting blade guide part 43, which is a ground protector. It is extremely economical and convenient. Furthermore, the extra fuel required for contact resistance is not consumed. And since the ground protector on the lower surface does not rotate, it is possible to carry out the mowing work with the cutting blade guide part 43, which is the ground protector, placed on the ground, significantly reducing the labor of the operator and enabling light work. And

Further, since the cutting blade guide portion 43 does not rotate, it does not receive resistance due to rotation from the ground contact surface, is less likely to be hindered by the steerability of forward movement of the self-propelled grass mower 11, and the required power can be reduced. Further, since the bowl-shaped curved surface is provided with respect to the ground surface, the resistance of the ground portion can be minimized.
Since the cutting blade guide portion 43 is provided with the ground pressure adjusting means B at the time of work, the ground pressure can be adjusted to the optimum ground pressure according to the conditions of the cutting field, and the work can be performed with the minimum power.
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 perform cutting with high accuracy.

11 Self-propelled mower 12 Body 14 Control part 15 Operation part 21 Traveling part 41 Cutting blade for plane cutting (cutting blade for mower)
42 rotary cutting blade 43 cutting blade guide 51 link mechanism 64 spring B adjusting means

Claims (3)

An aircraft having a running part,
In a self-propelled mower equipped with a cutting blade for plane cutting on the front of the machine,
In the cutting blade part, a first cutting blade holding arm tip having a base attached to the machine body and a second cutting blade holding arm tip having a base attached to the cutting blade side are horizontally rotatably connected,
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 portion is rotatable relative via a bearing with respect to the rotation axis of the rotating cutting blade, have a bowl-shaped curved surface with respect to the ground plane,
An arcuate elongated hole is provided on the rear side of the first cutting blade holding arm on the machine body side, and a vertical rotation center that is attached to the machine body and is vertically rotatable is provided.
When the tip of the electric cylinder installed in the center of the machine is slidable along the elongated hole, the second cutting blade holding arm and the rotary cutting blade can move up and down, and the cutting blade The guide part follows the installation surface,
A blade for a mower, which is characterized by that. Means for adjusting the ground pressure during the operation of the cutting blade guide portion are provided,
A cutting blade 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 capable of following irregularities of a ground surface.
A cutting blade part for a mower according to claim 1 or 2.

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