JPH0576228U - Mower - Google Patents

Abstract

(57) [Summary] [Purpose] While reducing the weight of a mowing machine that mows grass on the upper and slope sides of a ridge at the same time, the vertical movement of a sloping cutter can be easily adjusted according to the height of the ridge. To be able to do it. An upper cover 58 that covers the upper side of the slope rotary cutter 38 is attached to the upper cover 54 of the flat surface rotary cutter 44 so as to be vertically adjustable, and the slope cover cutter is supported by the upper cover 58 of the slope rotary cutter 38. The side cover 62 is attached so that the angle can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mower capable of simultaneously cutting grass on the upper surface of a ridge and on the slope.

[0002]

[Prior Art]

 Generally, in this seed mower, in order to mow grass on the upper surface of slopes and slopes at the same time, a plane rotary cutter that cuts a horizontal plane and a sloped surface that is located to the side of the plane rotary cutter are used. There are those equipped with a slope rotary cutter that does the above, and those that cover the upper part of these rotary cutters with a cover to prevent scattering of grass are disclosed, for example, in Japanese Utility Model Laid-Open No. 61-95228, and the slope rotary cutter is used as a slope. Japanese Utility Model Laid-Open No. 60-77329 discloses an angle-adjustable cutter that can be adjusted in accordance with the inclination of the rotary cutter, and a rotary cutter that is capable of rotary adjustment so that it can cut a plane.

[0003]

[Problems to be solved by the device]

 However, the former of the above-mentioned mowers has a structure in which the slope rotary cutter cannot adjust the height vertically depending on the ridge height, so in the case of low ridges, the slope rotary cutter contacts the field scene. Since the cutter will be damaged due to this, it is necessary to carry out cutting and running while floating the flat rotary cutter, which causes problems such as high cutting and leftover cutting. In addition, the latter one does not have the above-mentioned problems because the bevel rotary cutter can be rotated and adjusted, but the upper part is used to prevent the scattering of grass to the worker and to prevent the worker from touching the cutter. If a cover was provided, a cover was required in addition to the cutter support frame, which was a factor in increasing the weight of the mower. Moreover, the upper cover needs to be installed at a high position in anticipation of the vertical adjustment range of the bevel rotary cutter, which deteriorates the forward visibility and makes it impossible to configure the entire mower compactly.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve these problems in view of the above circumstances, and a plane rotary cutter for cutting a horizontal plane, and the plane rotary cutter. In a mower equipped with a bevel rotary cutter that is located on the side of the slant for cutting an inclined surface, and a cover that covers the upper part of both of these rotary cutters, the upper cover that covers the upper part of the slant rotary cutter is It is characterized in that it is attached to the upper cover of the rotary cutter so as to be adjustable in vertical movement, and a side cover that supports the slope rotary cutter is attached to the upper cover of the slope rotary cutter so that the angle can be adjusted. is there.

[0005]

[Action]

 When the slope rotary cutter faces the slope of the ridge and the plane rotary cutter is placed on the upper surface of the ridge for mowing and running, the upper surface of the ridge and the grass on the slope are simultaneously cut by both rotary cutters. At that time, when adjusting the position of the slope rotary cutter to correspond to the height of the ridge, adjust the upper cover of the slope rotary cutter to the upper cover of the flat rotary cutter to fix it by fixing it. , The slope rotary cutter can be placed at an appropriate position with respect to the flat rotary cutter. Also, during the mowing work, grass or mud that has been flipped up by the cutter is prevented from scattering by the upper cover provided above the rotating cutters. Furthermore, when adjusting the vertical movement of the bevel rotary cutter based on the difference in the ridge height, the upper cover of the bevel rotary cutter moves up and down independently with respect to the upper cover of the plane rotary cutter, which significantly obstructs the forward field of view. It is possible to smoothly carry out reaping work.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to a mower mounted on a management machine shown in the drawing. In FIG. 1, the management machine 1 includes left and right traveling wheels 2 and 2 and an output of an engine 4 mounted on a machine frame 3. Power is transmitted from the pulley 5 to the input pulley 8 of the traveling mission case 7 via the belt 6. A balance weight 10 is attached below the left and right handles 9, 9. The mower 11 is attached to the front part of the management machine 1 described above, and the rear support frame 12 of the mower 11 is detachably fixed to the machine frame 3 with bolts 13. Reference numeral 14 denotes a support cylinder fixed to the rear support frame 12, and the cutting height of the mower can be arbitrarily adjusted by adjusting and fixing the vertical height of the auxiliary wheel 15 provided below. .. Further, left and right metal receivers 16 and 16 that open obliquely upward are fixed to the front portion of the rear support frame 12, and the metal members 16 and 16 that are integrally formed with the bevel gear case 17 project left and right. Cases 18 and 19 are rotatably fitted. The pin 20 prevents the shaft cases 18 and 19 from coming out forward, and the main part of the mower can be attached and detached even from this part. An arm 21 is fixed to the end portion of the shaft case 19 described above. The arm 21 includes an intermediate arm 22 rotatably supported by the rear support frame 12 and connecting rods 23, 24. It is linked to the arm 25 a of the lift operating lever 25 provided on the handle 9 via the arm 25 a. Therefore, if the lift operating lever 25 is operated downward from the state shown in the figure to engage with the lever guide 26, the main part of the mower 11 will be located at two points from the solid line position in FIG. Rotate to the position indicated by the chain line to facilitate running on the road.

Further, as shown in FIG. 2, a drive-side bevel gear 27 is fixedly incorporated in a shaft 28 inside the bevel gear case 17, and two pulleys 29 a and 29 b are provided at an end of the shaft 28. Is fixed. The outer pulley 29a of the two pulleys is driven by the output pulley 5a of the engine 4 via the belt 30 and the belt tension clutch 31 constituting the working machine clutch. The casing 32a of the centrifugal clutch 32 is fixed to the tip of the arm 18a extending from the shaft case 18, and the input shaft 33 of the centrifugal clutch 32 is placed inside via a pulley 34 fixed to the input shaft 33. Is transmitted from the pulley 29b of the above through the belt 35. The output shaft 36 of the centrifugal clutch 32 is connected to a flexible wire 37, and the tip of the flexible wire 37 is connected to an input shaft (not shown) provided in a bevel gear case 39 of the slope rotary cutter 38. On the other hand, the output-side bevel gear 40 that meshes with the drive-side bevel gear 27 drives an output shaft 41 that extends above the bevel gear case 17, and a pulley 42 fixed to the output shaft 41 is planar via a belt 43. The pulley 45 of the rotary cutter 44 is driven. Reference numeral 46 is a belt cover.

Next, the structure of the plane rotary cutter 44 and the slope rotary cutter 38 that form the main part of the mower will be described. The plane rotary cutter 44 includes a drive shaft 47 that fixes the input pulley 45, and a drive shaft 47. The shaft 47 is internally supported by the shaft case 48. The shaft case 48 is fixed to the tip of a support arm 50 extending forward from an L-shaped boss 49 integrated with the bevel gear case 17. The shaft case 48 is inclined forward and upward by a predetermined angle α, and is provided at the lower end with a rotary body 52 having a flexible cord 51 made of synthetic resin such as nylon as a cutting blade. The slope rotary cutter 38 also includes a similar rotary body 52, and the rotary body 52 is rotationally driven by a drive shaft (not shown) provided in the above-mentioned bevel gear case 39. The shaft case 53 is also arranged to be inclined forward and upward by a predetermined angle α, similarly to the plane rotary cutter 44.

Here, the upper cover 54 provided above to cover the rotation trajectory of the flat rotary cutter 44 is fixed to the bracket 48 a fixed to the shaft case 48 in a height-adjustable manner. The mounting plate 54a, which is erected upright, is fixed to the bracket 48a by a fastener 55 composed of a bolt and a nut having a grip. The height adjustment of the upper cover 54 in the embodiment is a three-step adjustment method in which the height is adjusted by 50 mm upward and downward from the standard position, but it is also possible to appropriately change the height in a stepless manner. In addition, on the left side and the rear side of the upper cover 54, anti-scattering covers 56 and 57 made of a flexible member such as a rubber plate are hung. Further, an upper cover 58 of the inclined surface rotary cutter 38 is fixed to the upper cover 54 of the flat surface rotary cutter 44 in a height adjustable manner, and a mounting plate 58a erected on the upper cover 58 is an upper cover. 54, and a mounting bracket 60 integrally fixed to the side plate 59 of the upper cover 54 is fixed by a fixing tool 61 composed of a bolt and a nut having a grip. Here, if the upper cover 58 is vertically adjusted by loosening the grip, the height can be adjusted by 50 mm vertically from the standard position shown in FIG.

Further, a side cover 62 is rotatably attached to the upper cover 58 of the bevel rotary cutter 38 by a butterfly plate, and fan-shaped plates fixed to the upper cover 58 and the side cover 62, respectively. By fixing 63 and 64 with the fastener 65, the attachment angle of the side cover 62 to the upper cover 58 can be adjusted in three steps. In addition, a U-shaped guide plate 67 fixed to the shaft case 53 of the slope rotation cutter 38 is slidably fitted between the plates 66 and 66 fixed to the side cover 62, and the slope rotation cutter 38 is fixed. The sloped cutter 38 is supported on the side cover 62 by being slidably fixed to an arbitrary position within the long hole by the tool 68. Therefore, the vertical height of the slope rotary cutter 38 can be adjusted also by this slide adjustment.

In the embodiment of the present invention configured as described above, when mowing ridges, the height of the auxiliary wheel 15 is first adjusted so that the rotary body 52 of the flat rotary cutter 44 is placed on the ridge surface. Make contact only. Next, the inclination angle of the slope rotary cutter 38 is adjusted so as to follow the inclination angle of the ridge slope. That is, the inclination angle of the inclined surface rotary cutter 38 is adjusted by adjusting the attachment angle with the upper cover 58 by swinging the side cover 62 up and down with the fastener 65 loosened. Further, the adjustment of the ridge height is performed by adjusting the height of the slope rotary cutter 38 with respect to the flat rotary cutter 44 so that the cutting blade 51 of the slope rotary cutter 38 does not reach the field scene. ), (B), (c), the upper cover 58 of the slope rotary cutter 38 is moved up and down with the fixing tool 61 loosened, so that the attachment position of the flat rotary cutter 44 to the upper cover 54 is changed. It is done by adjusting. Further, when it is necessary to further move the inclined surface rotary cutter 38, as shown in FIGS. 5D and 5E, the upper cover 54 of the flat surface rotary cutter 44 and the fastener 55 are attached. By adjusting the mounting position of the flat rotary cutter 44 to the shaft case 48 in the loosened state, the height of the slope rotary cutter 38 can be secondarily adjusted.

After the adjustment described above, when the mowing of the ridges is started, the flat rotary cutter 44 is driven through the belt 43, and the rotating body 52 is inclined at a predetermined angle, so that the tip of the cutting blade 51 is ridged. Mow all the grass while striking the top surface. Here, if grass or the like is wrapped around the cutting blade 51 or the rotary body 52 contacts an obstacle such as a stone and an overload is applied to the flat rotary cutter 44, the belt 43 slips to the flat rotary cutter 44. Therefore, the drive shaft 47 of the flat rotary cutter 44 is prevented from being damaged in advance. The slope rotary cutter 38 is also driven via the centrifugal clutch 32 and the flexible wire 37, and if the cutting blade 51 and the rotary body 52 are overloaded, the centrifugal clutch 32 functions as a torque limiter. The power transmission from the engine 4 is cut off to prevent damage to the flexible wire 37 and the like. When the upper surface of the ridge is wide or when cutting the lawn in the garden, the slope rotary cutter 38 is moved to the horizontal position on the same plane as the plane rotary cutter 44, as shown in (f) of FIG. Then, two planes are simultaneously cut by two cutting blades. In this case, the side cover 62 of the slope rotary cutter 38 is first moved and fixed to a position flush with the upper cover 58, and then the upper cover 58 of the slope rotary cutter 38 is replaced with the upper cover 54 of the plane rotary cutter 44. Move and fix on the same plane. Then, next, the guide plate 67 of the bevel rotary cutter 38 is overlapped with the plate 66 of the side cover 62 so that the cutting blade locus K of the bevel rotary cutter 38 overlaps with the blade S of the plane bevel cutter 44 in the horizontal direction. , 66 slide adjustment. By this adjustment, the slope rotary cutter 38 is positioned slightly forward of the flat rotary cutter 44, and since the cutting blade tracks overlap each other, it is possible to perform a wide range of grass cutting work without leaving uncut residue.

The plane rotary cutter 44 and the slope rotary cutter 38 are rotated in the opposite directions to each other, and the mowed grass is removed from the inner space of the rotary cutters 44 and 38 by the rotation of the cutting blade 51. Collected toward B and discharged to the rear. Therefore, in the case of mowing ridges, the grass on the slope is scraped up on the upper surface of the ridge, which is suitable for subsequent grass treatment and the like. Moreover, when the rotational speed of the inclined surface rotary cutter 38 is made higher than that of the flat surface rotary cutter 44, the scraping action of the slope is promoted, and the scraped grass becomes a defense wall for the grass cut by the flat surface rotary cutter 44. Therefore, grass will be collected well on the upper surface of the ridge. Moreover, since the upper cover is located high above the slope rotary cutter 38, which is the collection point, and the discharge space B is formed wide, the grass can be discharged backward smoothly. Further, in the above embodiment, the plane rotary cutter 44 and the slope rotary cutter 38 are set in a fixed state with respect to the management machine 1. However, for example, the side cover 62 of the slope rotary cutter 38 is set inside the upper cover 58. It is also possible to appropriately change the structure in which the spring is biased in the direction and the slope rotary cutter 38 is rotated to follow the unevenness of the slope to cushion the shock. The structure is not limited to.

[0014]

[Effect of the device]

 In short, the present invention is provided with the plane rotary cutter 44 for cutting a horizontal plane and the slope rotary cutter 38 located on the side of the plane rotary cutter for cutting an inclined surface. The upper surface and the slope can be mowed at the same time, and the upper cover 58 that covers the upper surface of the slope rotary cutter 38 is vertically adjusted with respect to the upper cover 54 of the flat rotary cutter 44 according to the height of the ridge. As a result, the position of the slope rotary cutter can be changed up and down, damage to the rotary cutter 38 can be prevented, and the grass can be mowed without cutting residue. Further, since the side cover 62 that supports the bevel rotary cutter 38 is attached to the upper cover 58 so that the angle can be adjusted, the bevel rotary cutter 38 and the upper cover 58 are flush with each other, and the plane can be simultaneously mowed. In addition, the upper cover 58 and the side cover 62 can also be used as the support frame of the inclined surface rotary cutter 38, and the weight of the mower 11 can be reduced without providing another support frame. Moreover, since the upper cover 54 of the flat rotary cutter 44 is fixed, only the upper cover 58, which covers the upper side of the slope rotary cutter 38, is vertically adjusted according to the ridge height. The entire mower can be configured as a compact without deterioration.

[Brief description of drawings]

FIG. 1 is an overall side view showing a state in which a mower is attached to a management machine.

FIG. 2 is a partial plan sectional view showing the transmission of the mower.

FIG. 3 is a front view of the mower.

FIG. 4 is a front view showing the height adjustment of a bevel rotary cutter.

FIG. 5 is a front view showing the height adjustment of the upper cover with respect to the plane rotary cutter.

[Explanation of symbols]

 1 Management Machine 11 Mowing Machine 38 Slope Rotating Cutter 44 Planar Rotating Cutter 54 Top Cover of Planar Rotating Cutter 58 Top Cover of Slope Rotating Cutter 62 Side Cover of Slope Rotating Cutter

Claims (1)

[Scope of utility model registration request] 1. A flat rotary cutter for mowing a horizontal plane, a slope rotary cutter located laterally of the flat rotary cutter for mowing an inclined surface, and a cover for covering the upper part of both rotary cutters. In the mower, the upper cover that covers the upper surface of the slope rotary cutter is attached to the upper cover of the flat surface rotary cutter in a vertically adjustable manner, and the side that supports the slope rotary cutter on the upper cover of the slope rotary cutter. A mower characterized in that the part cover is attached so that the angle can be adjusted.