JP2014140306A - Spiral rotor - Google Patents

Abstract

Provided is a spiral rotor capable of ensuring the straightness of a spiral rotor during a forward traveling of a management machine and cutting a lying grass or the like to suppress a decrease in work efficiency of mowing work.
A spiral rotor 20 includes a rotation center shaft 31 connected to an axle of a management machine, and an inner side provided along a plane substantially orthogonal to the axial direction of the rotation center shaft 31 on both sides in the axial direction. The support member 22 and the outer support member 27, and the spiral blade 33 connected between these support members, are rotated along with the rotation of the axle. The outer support member 27 includes a disc portion 27a connected to the rotation center shaft 31, and a plurality of projecting plate portions 27b extending radially from the outer edge and formed with a predetermined interval in the circumferential direction. Become. One end portion in the longitudinal direction of the spiral blade 33 is connected to the front side in the rotational direction of the distal end portion of the protruding plate portion 27b, and extends along the rotational direction to the rear side in the rotational direction of the distal end portion of the projected plate portion 27b and protrudes radially outward. A vertical lug 27c is provided.
[Selection] Figure 3

Description

  The present invention relates to a spiral rotor that is attached to an axle of a management machine and rotates as the axle rotates.

  Conventionally, mowing work is performed by a management machine equipped with a spiral rotor. As described in Patent Document 1, the spiral rotor includes a pair of rings arranged on both sides in the axial direction of the rotor and a plurality of spiral blades that connect the rings. .

  The spiral blade is formed in a band shape, and the blade portion is formed to extend in the longitudinal direction at the end portion on one side in the short direction of the spiral blade. One end in the longitudinal direction of the spiral blade is fixed to the outer peripheral upper surface of the ring arranged on the outer side in the axial direction of the rotor, and the other end in the longitudinal direction of the spiral blade is fixed to the outer peripheral upper surface of the ring arranged in the inner side in the axial direction of the rotor. ing. For this reason, when the spiral rotor rotates so that the blade portion is on the front side in the rotation direction with the management machine installed in the field, the management machine moves forward with the rotation of the spiral rotor, and the spiral blade cuts the grass in the field. Etc. can be reaped.

Japanese Utility Model Publication No. 63-167803

  In this conventional spiral rotor, the longitudinal end of the spiral blade is connected to the upper surface of the outer periphery of the ring. Therefore, when the spiral rotor rotates, the rotation locus of the ring is located inside the rotation locus of the spiral blade. For this reason, when cutting grass or the like with a spiral blade, the ring is less likely to enter the soil of the field, and the traveling direction of the spiral rotor is likely to change when the management machine is traveling forward, and it is provided on both sides of the spiral rotor in the axial direction. Since the ring has a circular cross section, even if the ring rotates on the grass or the like that exists on the field surface and extends in a direction transverse to the traveling direction of the management machine, The grass that extends in the lateral direction cannot be cut. For this reason, the work efficiency of mowing work falls.

  The present invention has been made to solve such problems, and when the management machine travels forward, it ensures the straightness of the spiral rotor and enables cutting of grass extending in the lateral direction existing in the field. An object of the present invention is to provide a spiral rotor capable of suppressing a decrease in work efficiency of mowing work.

  In order to solve such a problem, the present invention provides a rotation center shaft connected to the axle of the management machine and a plane substantially orthogonal to the axial direction of the rotation center shaft on both axial sides of the rotation center shaft. And a pair of support portions (inner support member 22 and outer support member 27 in the embodiment) provided along the spiral support portion and a spiral blade connected between the pair of support portions. The center part (the disk part in the embodiment) in which the support part (outer support member 27 in the embodiment) disposed on the outer side in the axial center direction of the rotation center axis is connected to the center axis of rotation. 27a) and a plurality of projecting plate portions extending radially from the outer edge of the central plate portion and having a predetermined interval in the circumferential direction, the tip end portion of the projecting plate portion One end of the spiral blade in the longitudinal direction is connected to the front side in the direction of rotation. Characterized in that the vertical lugs are provided which project radially outwardly extends along the rotational direction in the rotation direction rear side of the distal end portion of the projecting plate portion (claim 1).

  Further, the vertical lug of the present invention has a vertical lug front portion having an inclined portion that inclines radially outward as it proceeds from the front side in the rotational direction to the rear side of the protruding plate portion at the front end portion in the rotational direction of the vertical lug, A vertical lug main body connected to the front of the lug and extending rearward in the rotational direction, and the vertical lug front and the vertical lug main body enter the soil of the field as the protruding plate rotates. (Claim 2).

  Further, the radially outer end of the vertical lug of the present invention is formed to be movable on a rotation locus drawn with a radius substantially the same as the rotation locus of the spiral blade or a radius smaller than the rotation locus of the spiral blade. (Claim 3).

  Moreover, the spiral blade of the present invention has a receding angle on the rear side in the rotational direction as it extends from the support part arranged inside the management machine to the support part arranged outside on the outside of the pair of support parts. Between the projecting plate portions that are connected between the support portions and are adjacent to each other in the circumferential direction of the support portion disposed outside the management machine, a hole that opens to the circumferential end and extends to the center side of the support portion is provided. (Claim 4).

  According to the spiral rotor according to the present invention, the spiral rotor having the above-described characteristics can ensure the straight advanceability of the spiral rotor and suppress the decrease in the working efficiency of the mowing work when the management machine moves forward. be able to.

The front side perspective view of the management machine with which the spiral rotor concerning one Embodiment of this invention was mounted | worn is shown. The fragmentary perspective view of the management machine with which the spiral rotor was mounted | worn is shown. Explanatory drawing of the side surface side of a spiral rotor for demonstrating the outer side supporting member of a spiral rotor is shown.

  The spiral rotor of the present invention will be described below with reference to FIGS. In the present embodiment, a spiral rotor mounted on a walking management machine will be described. First, before describing the spiral rotor, the management machine will be described with reference to FIG. 1 (front perspective view) and FIG. 2 (perspective view).

  As shown in FIG. 1, the management machine 1 has an engine (not shown) mounted on a body frame 3, and a mission case 5 that extends downward is provided at the center of the body frame 3. A pair of axles protrude from both sides, and the spiral rotors 20 and 20 'are attached to the axles.

  A cover 9 that covers the engine is provided on the body frame 3, and a pair of operation handles 11 that extend obliquely rearward and upward from both sides in the width direction of the body frame 3 are provided at the rear of the body frame 3. The engine is driven by an operation of a lever 11a provided on the operation handle 11, and rotates the spiral rotors 20, 20 'via the axle.

  Next, the spiral rotors 20 and 20 ′ will be described. The spiral rotors 20 and 20 'are provided on both sides of the transmission case 5 in the width direction. Since these are symmetrical structures, the spiral rotor 20 provided on the right side in the width direction will be described. Regarding the provided spiral rotor 20 ′, the same reference numerals are given to the same aspects as the spiral rotor 20, and the description thereof is omitted.

  As shown in FIG. 2, the spiral rotor 20 includes a rotation center shaft 31 mounted on the axle, an inner support member 22 and an outer support member 27 disposed on both sides of the rotation center shaft 31 in the axial direction, and these inner support members. A plurality of spiral blades 33 connected between the member 22 and the outer support member 27 are provided.

  The rotation center shaft 31 is formed in a cylindrical shape, and the axle of the transmission case 5 is inserted into an opening on one side of the rotation center shaft 31 and is connected by a connecting pin 35 inserted between the rotation center shaft 31 and the axle. The rotation center shaft 31 is connected to the axle. For this reason, the spiral rotor 20 can be removed from the axle by removing the connecting pin 35 from the rotation center shaft 31 and the axle.

  The inner support member 22 includes an annular ring 23 and a plurality of spokes 24 that connect the ring 23 and the rotation center shaft 31. The ring 23 is disposed coaxially with the rotation center shaft 31 by a plurality of spokes 24. The radius of the ring 23 is smaller than the rotation radius of the spiral blade 33 connected between the inner support member 22 and the outer support member 27. For this reason, the ring 23 does not interfere when the grass or the like is cut by the spiral blade 33.

  The spiral blade 33 has an inner end in the longitudinal direction connected to the inner surface of the ring 23 from the lateral direction, and an outer side in the longitudinal direction of the spiral blade 33 has a receding angle α (see FIG. 1). Extending to the rear side, the outer end of the spiral blade 33 in the longitudinal direction is connected to the outer support member 27. The connection of the outer edge of the spiral blade 33 in the longitudinal direction to the outer support member 27 will be described later.

  As shown in FIGS. 2 and 3, the outer support member 27 extends radially with a disc portion 27 a formed in a substantially circular shape when viewed from the side and a predetermined interval in the circumferential direction on the outer periphery of the disc portion 27 a. It has a plurality of protruding plate portions 27b. In the drawing, six protruding plate portions 27b are formed on the outer periphery of the disc portion 27a with an angle of about 60 ° with other adjacent protruding plate portions 27b.

  The protruding plate portion 27b is formed so that its width increases as it advances toward the tip side. The outer end in the longitudinal direction of the spiral blade 33 is fixed to the inner surface on the front side in the rotational direction of the protruding plate portion 27b by welding from the lateral direction.

  Since the spiral blade 33 connected between the ring 23 and the protruding plate portion 27b extends with a receding angle α, most of the grass and the like cut by the spiral blade 33 when the spiral rotor 20 rotates. Although some of the grass and the like that is discharged to the rear side in the traveling direction is pushed outward in the axial direction of the spiral rotor 20 by the receding angle α of the spiral blade 33, the protruding plate portion 27b of the outer support member 27 is pushed. It discharges | emits from the hole 27d mentioned later formed in between.

  As shown in FIG. 3, a longitudinal lug 27c that extends along the rotational direction and projects outward in the radial direction is formed on the rear side in the rotational direction of the distal end portion of the protruding plate portion 27b. The vertical lug 27c includes a vertical lug front portion 27c1 having an inclined portion 27c1a that inclines radially outward as it advances from the front side in the rotational direction of the protruding plate portion 27b to the rear end in the rotational direction. The vertical lug main body 27c2 is connected to 27c1 and extends rearward in the rotational direction.

  The circumferential end of the vertical lug body 27c2 extends circumferentially along the rotational direction. Note that the circumferential end of the vertical lug body 27c2 is not limited to a circular shape, and as will be described later, if the circumferential end of the vertical lug body 27c2 does not exceed the rotational trajectory of the spiral blade 33, it is linear. May be formed.

  When the spiral rotor 20 rotates, the vertical lug 27c enters the soil from the inclined portion 27c1a of the vertical lug front portion 27c1, and substantially the entire portion indicated by the oblique lines of the vertical lug front portion 27c1 and the vertical lug main body portion 27c2 is in the soil. Get inside. For this reason, the situation where the traveling direction of the spiral rotor 20 changes due to the vertical lugs 27c entering the soil can be suppressed, the straightness of the spiral rotor 20 can be improved, and the grass lying laterally on the field Etc. can be cut. Therefore, the workability of mowing work can be improved.

  Further, the radially outer end of the vertical lug main body 27c2 of the vertical lug 27c is formed so as to move on a rotational locus drawn with substantially the same radius r as the rotational locus L of the spiral blade 33. When the spiral rotor 20 is rotated, the spiral blade 33 can enter the soil and cut the root portion of the grass or the like. Long stems can be cut reliably.

  In addition, the radial direction outer side edge part of the vertical lug main-body part 27c2 of the vertical lug 27c may be comprised so that it may move on the rotational locus drawn with a radius slightly smaller than the rotational locus of the spiral blade 33. . Moreover, since the radial direction outer side edge part of the vertical lug main-body part 27c2 of the vertical lug 27c is arrange | positioned in the substantially same position as the rotation locus | trajectory of the spiral blade 33, when the spiral rotor 20 rotates, the spiral rotor 20 is made to go up and down. Vibrating pitching can be suppressed.

  A hole 27d formed between adjacent projecting plate portions 27b provided in the outer support member 27 is formed in a U-shape that expands toward the disc portion 27a side in a side view. For this reason, since the root side of the adjacent protruding plate portion 27b is also greatly opened, most of the grass and the like cut by the spiral blade 33 is discharged to the rear side in the traveling direction, but the one that is applied to the spiral blade 33 The grass or the like is pushed outward in the axial direction of the spiral rotor 20 by the receding angle α of the spiral blade 33 and discharged from the hole portion 27d formed between the protruding plate portions 27b of the outer support member 27.

  In the practical example described above, the case where the six projecting plate portions 27b of the outer support member 27 are provided in the circumferential direction is shown. However, considering the suppression of pitching, the projecting plate portion 27b is arranged around the outer support member 27. Seven or eight may be provided in the direction.

  In the above-described embodiment, as shown in FIG. 1, the walking-type management machine 1 is taken as an example of the management machine to which the spiral rotors 20 and 20 ′ are mounted. However, a self-propelled management machine may be used.

1 management machine 20, 20 'spiral rotor 22 inner support member (support part)
27 Outer support member (support part)
27a Disk part (center plate part)
27b Projection plate part 27c Vertical lug 27c1 Vertical lug front part 27c1a Inclined part 27c2 Vertical lug body part 27d Hole 31 Rotation center axis 33 Spiral blade L Rotation locus

Claims (4)

A rotation center shaft coupled to the axle of the management machine, a pair of support portions provided on both sides in the axial direction of the rotation center axis along a plane substantially orthogonal to the axial direction of the rotation center axis, A support portion disposed between the pair of support portions and disposed outside of the rotation center axis in the axial direction. A spiral rotor having a center plate portion connected to the rotation center shaft and a plurality of projecting plate portions extending radially from the outer edge of the center plate portion and formed at predetermined intervals in the circumferential direction Because
One end portion in the longitudinal direction of the spiral blade is connected to the front side in the rotation direction of the front end portion of the protruding plate portion, and extends along the rotation direction to the rear side in the rotation direction of the front end portion of the protruding plate portion and protrudes radially outward. A spiral rotor characterized by a vertical lug. The vertical lug has a vertical lug front portion having an inclined portion that inclines radially outward as it advances from the front side in the rotational direction of the projecting plate portion to the rear side at the front end portion in the rotational direction of the vertical lug; A vertical lug main body portion that is connected to the portion and extends rearward in the rotation direction, and the vertical lug front portion and the vertical lug main body portion enter the soil in the field as the projecting plate portion rotates. The spiral rotor according to claim 1. The radially outer end of the vertical lug is formed to be movable on a rotation locus drawn with a radius substantially the same as the rotation locus of the spiral blade or a radius smaller than the rotation locus of the spiral blade. The spiral rotor according to claim 1, wherein the spiral rotor is provided. The spiral blade has a receding angle on the rear side in the rotational direction as it extends from a support portion disposed inside the management machine to a support portion disposed outside the pair of support portions, and the pair of support portions. Connected between departments,
Between the projecting plate portions adjacent to each other in the circumferential direction of the support portion arranged outside the management machine, a hole portion that opens to the circumferential end portion and extends toward the center of the support portion is provided. The spiral rotor according to any one of claims 1 to 3.

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