JP2020099296A - Mower - Google Patents

Abstract

To solve problems that, as a form of preventing scattering of a reaped object or pebbles, some mowers comprise a rubber plate or a sheet metal suspension plate, however, the rubber plate has insufficient durability and the sheet metal suspension plate easily opens largely when pebbles rush out, therefore pebbles easily rush out from a cover interval part where a cover is opened.SOLUTION: A mower is configured so that, on an inlet part 7 or a discharge hole part 8 of cut grass of a reaping cover 5, a sheet metal or hard resin cover plate 10 which is divided into a plurality of pieces over a width direction and formed into a row-state shape, is suspended so as to freely swing in a cross direction, and an external cover 12 which is along an external side surface part of the cover plate 10 and formed of one plate or one sheet-state elastic material such as a rubber material, is suspended, namely a double cover K is provided on the mower.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lawnmower for mowing turf grass, weeds, etc., and is provided with a double cover for preventing the wood chips, stones, etc., that are bounced off at the same time as mowing by the rotation of the cutting blade, from splashing out and scattering. It concerns a mower.

2. Description of the Related Art A technique of a mowing machine is known in which a mowing device is mounted on the front side of a vehicle body in a steering wheel operation traveling mode for operating a steering wheel rod extending rearward, and performing grass cutting work while traveling forward. It is known that a rubber cover of a rectangular shape divided into a plurality of plates in a lateral width direction of the mowing device is bent and deformably hung and installed at the mowing device in front of the mowing device. ..

JP 2012-50416 A

A rubber plate or a hanging plate made of sheet metal may be provided as a form for preventing the scattering of mowed material, stone gravel, etc. of a mower, but the rubber plate is inferior in durability, and if it is made of sheet metal, stones When it is bounced out, it easily opens wide, and it becomes easy for stones and stones to jump out from the cover gap portion where this cover is opened.

The invention according to claim 1 is provided with a mowing device 6 in which a mowing unit 2 in which a mowing blade 1 is arranged is axially mounted on a mowing shaft 3, and an upper peripheral portion of the mowing unit 2 is covered with a mowing cover 5. In the mowing machine, a cover made of a sheet metal or a hard resin plate which is divided into a plurality of pieces in the width direction and is formed in a row shape at the cut grass intake port 7 or the discharge port part 8 of the cut cover 5. A double cover K is provided that suspends the plate 10 so as to swing back and forth, and suspends an outer cover 12 in the form of a single plate or a single sheet along the entire width of the outer side surface of the cover plate 10. The configuration of the mower is characterized by that.

When the grass mower is made to travel and the intake port 7 for cutting grass is introduced into the root part of the grass stem, the outer cover 12 located on the front side of this intake part 7 pushes the grass stem forward. , Align the root stem with a bent shape. At this time, since the outer cover 12 has elasticity like a rubber plate and is continuously formed in a single plate shape in the width direction of the intake portion 7, even if the rear cover plate 10 is pushed, The outer cover 12 and the cover plate 10 are locally swung, distorted, bent, and the like with a small local change, so that the grass stems in a wide region of the intake portion 7 are aligned forward. The cutting blades 1 are aligned by pushing and bending, and go under the lower edge of the cover plate 10 to enter the rotation range of the cutting blade 1. The cutting action is performed by the cutting blade 1 of the cutting unit 2 acting on the grass stem portion. The grass mowed by the rotation of the mowing blade 1 is splashed under the mowing cover 5, collided with the inner surface of the cover plate 10 located at the outer periphery of the rotation, and dropped onto the mowing ground at the mowing trace.

During such a mowing operation, the cover plate 10 provided at the intake portion 7 and the discharge portion 8 of the grass tends to swing back and forth largely due to cutting resistance, etc. Since the outer cover 12 is formed of a rubber plate, a rubber plate, or a rubber sheet and has a double shape, the large swing of each divided cover plate 10 is limited, and the opening distance between the adjacent cover plates 9 is reduced. At a minimum, pebbles and the like are prevented from jumping out from the space between the cover plates 10.

Further, even if a piece of wood having a large mass or a large specific gravity, stone gravel, or the like is mixed in the grass to be mowed, the grass is bounced off by the rotation of the cutting blade 1 and strongly collided with the cover plate 10, the cover plate 10 The hardness, rigidity, and the like of the above-mentioned structure reduce the transmission of the impact force to the outer cover 12 by receiving the impact force. For this reason, the gap between the cover plates 10 is reduced to prevent the wood chips, stones, and the like from being directly discharged from the space between the cover plates 10 to the outside. This prevents the parts from opening and further reduces damage and the like of the outer cover 12 made of an elastic material.

According to the second aspect of the invention, in the mowing machine in which the mowing device 6 is provided in front of the vehicle body 15, the double cover K is provided in the mowing grass intake port 7 in front of the mowing cover 5, and the mowing device 6 is provided in the rear of the vehicle body 15. In the grass mower provided with, a double cover K is provided at the grass cutting outlet 8 at the rear of the mowing cover 5, a grass mowing device 6 is provided at the front and rear central abdomen of the vehicle body 15, and both traveling states of forward traveling and backward traveling are performed. In the mowing machine capable of mowing the work, the mowing machine is provided with a double cover K on both the intake 7 and the discharge of the grass.

The form of mowing work differs depending on the arrangement of the mowing device 6 with respect to the vehicle body 15. In a mowing machine having the mowing device 6 in front of the vehicle body 15, the vehicle body 15 is located behind the mowing device 6, and since stones and the like are less likely to come out to the upper rear, the intake portion 7 on the front side of the mowing device 6 is provided. In the mowing machine having the double cover K and the mowing device 6 at the rear of the vehicle body 15, the vehicle body 15 is located at the front of the mowing device 6, and the gravel or the like is less likely to fly forward and upward. A double cover K is provided on the rear outlet port 8, a mowing device 6 is provided on the front and rear central abdomen of the vehicle body 15, and the mowing work is possible in both forward traveling and reverse traveling states. Since the intake portion 7 and the discharge portion 8 for cutting grass of the mowing device 6 are switched between the forward traveling and the backward traveling, gravel and the like pop out both in front of and behind the vehicle body 15. The double cover K is provided on both the discharge port 8 and the discharge port 8.

In the invention according to claim 1, the cover plate 10 provided on the mowing grass intake portion 7 and the discharge opening portion 8 of the mowing device 6 is divided into a plurality of pieces in the mouth width direction, and A cover plate 10 made of a sheet metal or a hard resin plate is formed in a row shape, and the upper end edge of each cover plate 10 is oscillated back and forth with respect to the inlet portion 7 and the outlet portion 8. Since the cutting blade 1 is lowered, it is less likely to be damaged or damaged even if the grass stem cut by the rotation of the cutting blade 1 is discharged, and even if it is subjected to a scattering impact force of the cutting grass or the like, the cover plate 10 The outer side of the cover plate 10 is surrounded by the elastic outer cover 12, and the swinging of each cover plate 10 constituting the cover plate 10 and the opening of the gap between the cover plates 10 are regulated to remove the cover plate 10. At the time of guiding the grass stem at the entrance portion 7, the grass stem portion is bent forward to resist the elasticity of the outer cover 12 and the closing force of the inner cover plate 10 to adjust the posture of the grass stem portion. It can be mowed in the state of being made.

In this way, the cover plate 10 on the lower side of the mowing deck 4 can prevent the cutting grass from being scattered to the outside area of the cutting cover 5, resulting in a strong discharging output of the cutting grass and scattering and release of foreign matter such as wood chips and gravel. Even if an impact force is received, the outer cover 12 made of an elastic material on the outer periphery holds the outer cover 12 in an enclosed state to alleviate the swinging or strain impact force of each cover plate 10 and to prevent the excess between the cover plates 10. The opening of the cover plate 10 and the opening of the cover plate are reduced, and the cover plate 10 is excessively opened or the opening interval is enlarged, thereby disturbing the posture of the grass stem that is guided into the intake portion 7, or making one rotation of the cutting blade. It is possible to prevent foreign matter such as shavings and shards that are splashed away due to the like or the like from being scattered and discharged to the outside of the outer cover 12.

Further, although the outer cover 12 receives the swing and impact force of the cover plate 10, the impact force received by the cover plate 10 can be absorbed and alleviated, and the durability of the cover plate 10 can be increased. As a result, the outer cover 12 is less likely to be directly subjected to a scattering impact force such as pebbles and the like, and the durability can be enhanced, and the smooth rocking of each cover plate 10 is maintained, so that the pebbles and the like are prevented. It reduces impact noise and enables smooth grass cutting work.

The outer cover 12 receives the splashed pebbles and scatters to the outside even if the gap between the cover plates 10 is opened or if there is gravel or the like bounced outward from the opening of the gap. In order to prevent the above, prevent scattering and collision to workers, etc., and maintain safe work.

Also, the mowed grass is discharged outward and rearward from the lower edge of the cover plate 10 of the discharge port portion 8 and the outer cover 12, but the swing of each cover plate 10 and the swing of the outer cover 12 are performed. By this, the cut grass stems can be discharged smoothly, scattering from the gap between the cover plates 10 to the outside can be prevented, and the durability of the outer cover 12 can be improved.

According to the invention described in claim 2, depending on the arrangement of the mowing device 6 with respect to the vehicle body 15 and the difference in the condition of the traveling direction during the mowing work, the intake portion 7 having a high possibility of popping out gravel or the like, or The discharge port 8 is provided with a double cover K having an outer cover 12, and the intake plate 7 or the discharge port on the side where the scattering of pebbles and the like or the scattering of strong cutting power is unlikely to occur is the cover plate 10. Since it is composed of only one, the flow of grass intake and discharge can be carried out smoothly, and it has the effect of preventing stones and the like from splashing out, and the double cutting phenomenon by the cutting blade 1 in the cutting cover 5 You can carry out smooth grass cutting work without stagnation.

FIG. 3 is a side view of the mower in a steering wheel operation traveling mode. FIG. 3 is a plan view of a handle operation traveling mower in which a cutting blade is rotated in a horizontal direction. FIG. 4 is an exploded perspective view showing a state where the cover plate and the outer cover are attached and detached. A side view (a) and a front view (b) showing a mounting configuration of the cover plate and the outer cover. FIG. 3 is a side view of the mowing device section of the mowing machine in which the mowing device is attached to the front and rear central abdomen of the vehicle body. The top view of the mower. The arrangement top view of the mowing device part. Its rear view.

Based on the drawings, the handle 14 is projected to the upper rear part of the vehicle body 15, and the crawler 17 is interlocked with the drive of an engine 16 mounted on the vehicle body 15 to propel the vehicle, and the mowing device 6 is mounted on the front side of the vehicle body 15. And configure a mower. In this mowing device 6, the mowing blade 1 is arranged around a mowing shaft 3 which is horizontally mounted in a horizontal horizontal direction (see FIG. 1 ), and the mowing shaft 3 is driven by an engine 16 interlocking to cut the mowing blade. 1 can be rotated in the upper direction A with respect to the grass stem to perform mowing, and can be rotated in the down direction B to perform mowing. The mowing shaft 3 may be arranged along the up-down direction (see FIG. 2) and the cutting blade 1 may be rotated around the mowing shaft 3 to perform a mowing action.

Such a mowing device 6 is provided with a mowing cover 5 that covers the upper peripheral part of the mowing unit 2, opens the front lower end of the mowing cover 5, and guides the grass stem into the lower side of the mowing cover 5. The intake port 7 is formed, and the rear lower end of the reaping cover 5 is opened to form a reaping discharge port 8 for guiding the cut grass to the rear side. A grounding wheel 19 or a gauge wheel is provided at the front end of the side arm 18 projecting forward along both left and right ends of the mowing device 6, and the grass is spread over the width between the left and right grounding wheels 19, 19. Move the mower forward so as to guide the stem. The intake portion 7 is formed in a wide area over the space between the left and right ground wheels 19, 19. The discharge port 8 at the rear end of the mowing cover 5 is formed wide at the rear end of the mowing cover 5 and wide across the space between the left and right crawlers 17 under the bottom of the rear vehicle body 15. To be done.

In a mowing machine (see FIG. 1) that rotates the cutting blade 1 around the horizontal cutting shaft 3 to perform cutting, set the rotation direction of the cutting blade 1 on the front side of the cutting shaft 3 to the upper direction A. When it is set, the gravel and the like are less likely to be splashed to the rear side, but when it is set to rotate in the down direction B, the gravel and the like located near the ground when cutting grass are Often picked up and bounced backwards.

Further, in a mowing machine (see FIGS. 7 and 2) that rotates the cutting blade 1 around the vertical cutting shaft 3 to mow (see FIGS. 7 and 2), the cutting blade 1 runs along a rotation surface substantially parallel to the cutting ground. In order to widen this cutting width, a plurality of mowing parts 2 are arranged in the lateral direction and the rotation direction C of each of the left and right mowing parts 2 is changed. , The front side is turned inward from the left and right outer sides, and is rotated in opposition so that the grass is scraped by rotating in opposition to each other. (See FIG. 2) In a mowing machine (see FIG. 7) provided with a mowing device 6 in the front and rear central abdomen of the vehicle body 15, a large-diameter mowing section 2 is provided, and the mowing blade 1 is rotated around the mowing shaft 3 to mow the mowing. It is a mode to perform work, a mowing machine having left and right crawler 17 traveling devices is provided with a mowing device inside the left and right crawlers, and a mowing machine having traveling devices such as tires has one large diameter cutting blade type. It can also be applied to a machine with multiple cutting blades arranged on the left and right.

The cover plate 10 provided in the reaping opening 7 and the cutting outlet 8 is made of a metal plate or a hard resin plate in a rectangular shape or a square shape with an appropriate width and vertical width. Then, the upper edge portion is suspended around the cover shaft 20 which is installed laterally along the upper portion of the inlet portion 7 and the outlet portion 8 so as to be swingable back and forth. Each cover plate 10 can be independently rocked back and forth, and the plate edge interval (break) 22 between the adjacent cover plates 10 is opened and closed to open and close the edge intervals 22 of the cover plate 10. Easy to configure. The cover plate 10 is integrally formed with a hanging hole 21 formed at an upper edge portion thereof and is inserted into the cover shaft 20 so that each cover plate 10 can independently pivot and swing with a gap 22 as a boundary. It is configured. The cover shaft 20 is pivotally supported by shaft mounting portions 25 provided at both left and right ends.

The outer cover 12 provided on the front side of the cover plate 10 of the intake port section 7 or on the rear side of the cover plate 10 of the discharge port section 8 is made of an elastic material such as rubber, and is a single plate-like member that is elastically expandable and contractible. The outer cover 12 in the form of a single sheet is hung, and the front cover or the rear surface (outer side) of the cover plate 10 is superposed on the front cover of the cutting cover 5 by a screw stop 23 or the like of the holding plate 26. , Is detachably attached to the mounting bracket 24 at the rear edge (see FIG. 3).

The cover plate 10 and the outer cover 12 are suspended so as to overlap each other in the front-rear direction. Further, an appropriate front-rear cover interval may be formed between the front and rear surfaces of the cover plate 10 and the outer cover 12. Further, the hanging lengths of the cover plate 10 and the outer cover 12 covering the outer peripheral portion in the vertical direction are set to be substantially the same, but the lower end edge of the outer cover 12 is elongated downward with respect to the cover plate 10. It is also possible to set it in a protruding form, and conversely it is also possible to set it to be short. Further, the outer cover 12 is not formed into a single plate shape over the entire width of the inlet portion 7 or the outlet portion 8, but the space 22 between the inner cover plates 10 and 10 and the outer portion when the outer cover 12 is divided. It is also possible to divide and arrange the covers 12 and 12 so as not to overlap with the division interval portion. However, in this case, the possibility of stones or the like jumping out of the mowing device 6 to the outside is slightly higher than in the case where the outer cover 12 is formed in a single plate shape. It is preferable that the outlet portion 8 is formed in a single plate shape over the entire left and right widths.

The form of mounting the mowing device 6 on the abdomen of the vehicle body 15 is a lawnmower, a riding-type mowing device, and further a mowing work of a form in which a GPS is used for automatic operation or remote-controlled operation for mowing work. It can be installed as a machine (see FIGS. 5 to 8). On the vehicle body 15, a controller that outputs an operation signal from the engine 16 or a remote controller or a detection signal from a sensor and outputs a drive signal for the mowing device 6, a battery 28, and the like are mounted. By driving, the alternator 27 is belt-transmitted, the battery 28 is charged, the electric power is used to rotate the motor M, and the drive sprocket 29 of the crawler 17 is transmitted and rotated through the transmission mechanism in the transmission case 35 to travel the crawler 17. .. Further, at the bottom between the left and right crawlers 17, a mowing cover 5 is mounted which can be moved up and down via a pair of front and rear parallel links 30, and by extending and retracting the lift cylinder 31, a predetermined amount is provided via a lift arm 32 and a lift rod 33. It is provided so that it can be raised and lowered and adjusted in the height range, and the input pulley and the like on the mowing shaft 3 located at the center of the mowing cover 5 are driven to be transmitted.

In such a mowing device 6, the mowing width is limited to the space between the right and left crawlers 17 on the abdomen of the vehicle body 15, and the height of the mowing cover 5 is also limited. Therefore, the mowing device rotates about the single mowing shaft 3 to mow the mowing device. It has a simple configuration. In the abdomen-mounted mower, the front and rear inlets 7 and the outlet 8 of the mowing cover 5 are located near the front and rear ends of the vehicle body 15 on the upper side of the crawler 17. Since it is opened, the grass grass discharged from the discharge port portion 8 is easily blown up to the upper portion, and stones and the like are easily bounced to the foot portion of the operator. For this reason, the cover plate 10 and the outer cover 12 form a double cover K at both positions of the intake port 7 and the discharge port 8 which are formed corresponding to the front and rear positions of the vehicle body 15.

1 Cutting Blade 2 Mowing Section 3 Mowing Shaft 5 Mowing Cover 6 Mowing Device 7 Inlet 8 Ejection 10 Cover Plate 12 Outer Cover K Double Cover

Claims (2)

A mowing device (6) configured by axially mounting a mowing unit (2) on which a mowing blade (1) is arranged on a mowing shaft (3), and covering an upper peripheral portion of the mowing unit (2) with a mowing cover (5). In a grass mower provided with a sheet metal, which is formed into a row shape by dividing the cutting cover (5) into a plurality of sheets over the width direction at an inlet (7) or an outlet (8) of the grass. Made of or made of a hard resin plate, a cover plate (10) is oscillated so as to be swingable back and forth, and a one-sheet plate-shaped or one-sheet rubber material is formed along the entire width of the outer side surface of the cover plate (10). A mower having a double cover (K) for suspending an outer cover (12) formed of an elastic material such as In a mowing machine provided with a mowing device (6) in front of the vehicle body (15), a double cover (K) is provided in the grass cutting inlet (7) at the front of the mowing cover (5), and the double cover (K) is provided behind the vehicle body (15). In a mowing machine provided with a mowing device (6), a double cover (K) is provided at the mowing grass outlet (8) at the rear of the mowing cover (5), and the mowing device (6) is provided at the front and rear central abdomen of the vehicle body (15). In addition, in a mowing machine capable of mowing work in both forward and backward traveling states, a double cover (K) is provided on both the intake (7) and the discharge of the grass. The mower according to claim 1, wherein:

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