JP2011229539A - Axle drive type rotor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability when mounting a traveling wheel to a rotor plate.SOLUTION: A tilling rotor 2 includes a rotor shaft 5 having a square cylinder shaft 9 at the center part of the lateral outside end. The rotor plate 3 mounted to the lateral outside end of the tilling rotor 2 includes: a base part; three extended parts 3A extended radially outward from the equally spaced positions in the circumferential direction of the base part and shaped to curve onto the tilling rotor 2 side toward the extended end side; two through-holes 3B formed between the extended parts 3A in the circumferential direction of the base part; and a rectangular shaft 11 provided at the center part of the base part, fitted into the square cylinder shaft 9, and formed with an insertion hole 11A of round cylinder shape serving as a journal part for supporting a support shaft 14 by inserting the support shaft 14, made of a round shaft of the traveling wheel 4, into the center part. The traveling wheel 4 mounted to the lateral outside end of the rotor plate 3 includes projections 18 to be inserted through the through-holes 3B.

Description

  The present invention relates to an axle-driven rotor including a tilling rotor to be mounted on an axle of a walking work machine, a rotor plate to be mounted on the lateral outer end of the tilling rotor, and a moving wheel to be mounted on the lateral outer end of the rotor plate. Regarding the unit.

  As an axle drive type rotor unit as described above, a disk-shaped rotor plate (rotor disk) is provided with two arc-shaped long holes centered on the axis of the rotor shaft in the circumferential direction of the rotor plate, etc. A large-diameter hole is formed in the middle of each long hole in the longitudinal direction, and a connecting pin to be inserted into each long hole is protruded on the side surface of the moving wheel. At the tip, a large-diameter head that can be inserted into the long hole only at the large-diameter hole of the long hole is provided, and each connecting pin is inserted and locked into each long hole so that the moving wheel is connected to the rotor plate. There is a configuration (see, for example, Patent Document 1).

JP-A-5-193530

  By the way, in a wheel drive type rotor unit as described above, when a moving wheel is attached to a rotor plate, an operator usually has a lateral movement of a walking work machine equipped with a tilling rotor with the moving wheel. The large diameter hole portion of the rotor plate and the large diameter head portion of the moving wheel are aligned with each other so as to look down from a position higher than the moving wheel.

  However, in the above conventional structure, the two long holes having the large-diameter holes are formed at equal intervals (180 degree intervals) in the circumferential direction of the disk-shaped rotor plate. For example, in order to make it easier to visually recognize one of the long holes, when the posture in the rotation direction of the rotor plate is set so that the long hole is positioned on the upper side of the rotor plate, the other long hole becomes a moving wheel. It will be located on the lower side of the rotor plate that is difficult to visually recognize, and it will be difficult to align the large diameter hole provided in the long hole on the lower side and the large diameter head of the moving wheel.

  In addition, when the orientation of the rotor plate in the rotational direction is set so that the two long holes are positioned side by side in the horizontal direction, the rotor plate of both of the long holes is difficult to see because the line of sight to them is easily blocked by the moving wheels. Therefore, it is difficult to align the large-diameter hole provided in each long hole and the large-diameter head of the moving wheel.

  Moreover, since the rotor plate has a disk shape, when the line of sight to the long hole is blocked by the moving wheel, the position of the long hole cannot be estimated from the posture of the rotor plate in the rotation direction. It becomes easy to take time for visual recognition.

  That is, in the above conventional structure, there is room for improvement in terms of workability when the moving wheel is attached to the rotor plate.

  An object of the present invention is to improve workability when a moving wheel is attached to a rotor plate.

In order to achieve the above object, in the invention according to claim 1 of the present invention,
A tilling rotor to be mounted on an axle of a walking type working machine, a rotor plate to be equipped at a laterally outer end of the tilling rotor, and a moving wheel to be equipped at a laterally outer end of the rotor plate,
The rotor plate is formed in a substantially triangular shape including three extending portions extending outward in the radial direction and positioned at equal intervals in the circumferential direction,
In the central portion of the rotor plate, provided with a shaft support portion that supports the support shaft of the moving wheel,
Two through holes are formed in the rotor plate so as to sandwich one extension part,
The moving wheel is formed with two projecting portions that allow the moving wheel to be prevented from coming off from the rotor plate by being inserted into the corresponding through hole.

  According to this characteristic configuration, when the moving wheel is attached, if the posture in the rotation direction of the rotor plate is set so that the extending portion sandwiched between the two through holes faces upward, the two through holes are formed. Further, it is possible to position the upper part of the rotation center of the rotor plate at a position where the line of sight with respect to them is not easily obstructed by the moving wheel and is easily visible.

  Even if the line of sight to the two through holes is blocked by the moving wheel, the position of the two through holes can be easily estimated from the posture in the rotational direction of the rotor plate, and the visibility of each through hole can be visually confirmed. In addition to being able to carry out promptly, it is easy to align the through holes of the rotor plate and the protrusions of the moving wheels.

  As a result, the support shaft of the moving wheel can be supported by the shaft support portion of the rotor plate, and each protrusion portion of the moving wheel can be inserted into each through hole of the rotor plate. If it is prevented from coming off, etc., the moving wheel can be attached to the rotor plate.

  Therefore, workability when attaching the moving wheel to the rotor plate can be improved.

In the invention according to claim 2 of the present invention, in the invention according to claim 1,
The support shaft is supported by the shaft support portion so as to be relatively rotatable,
The through hole is formed in an arc shape with the center of curvature of the rotor plate as the center of curvature, and having an enlarged diameter portion at the center in the longitudinal direction,
The protruding end of the protruding portion is provided with a large-diameter head that is allowed to be inserted into the through hole only in the enlarged diameter portion.

  According to this characteristic configuration, the support shaft of the moving wheel is supported by the shaft support portion of the rotor plate, and the head of each protruding portion of the moving wheel is inserted into the enlarged diameter portion of each through hole of the rotor plate, and then the support shaft is moved. If the moving wheel is rotated with respect to the rotor plate as a fulcrum, the moving wheel can be easily attached to the rotor plate without using a retaining member such as a retaining pin.

  Therefore, workability when attaching the moving wheel to the rotor plate can be further improved.

It is a disassembled perspective view of the left rotor unit. It is a rear view of the left rotor unit. It is a right view of a left rotor plate and a moving wheel. It is a right view of the principal part which shows the attachment structure of the left rotor plate and a moving wheel. It is a right view which shows the shape of the rotor plate for left in another embodiment. It is a right view of the principal part which shows the attachment structure of the rotor plate for left and the moving wheel in another embodiment.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  The axle drive type rotor unit according to the present invention is a pair of left and right detachably attached to the left and right outer ends of the axle provided in the left and right direction at the lower part of the walking work machine. And since these are the same structures of left-right symmetry, below, only the structure of the left rotor unit provided on the left side of the walking work machine will be described.

  FIG. 1 is an exploded perspective view of a left rotor unit 1. FIG. 2 is a rear view of the left rotor unit 1.

  As shown in these drawings, the rotor unit 1 includes a tiller rotor 2 that is detachably attached to an axle (not shown) of a walking work machine and includes a rotor plate 3 and a moving wheel 4. .

  The tilling rotor 2 has six tilling claws 6 positioned at equal intervals (60 degree intervals) in the circumferential direction of the rotor shaft 5 on the rotor shaft 5 having a substantially hexagonal shape when viewed from the side, and the axis of the rotor shaft 5. It is arranged and arranged so as to be located at a predetermined interval in the direction.

  The arrangement of the tilling claws 6 in the circumferential direction of the rotor shaft 5 will be described in detail. In the right half of the rotor shaft 5, the three tilling claws 6 positioned in the right half of the rotor shaft 5 are arranged in the circumferential direction of the rotor shaft 5. It arrange | positions so that it may be located in a space | interval (120 degree space | interval). In the left half of the rotor shaft 5, the three tilling claws 6 positioned in the left half of the rotor shaft 5 have a rotation angle difference of 60 degrees in the circumferential direction of the rotor shaft 5 with respect to the right half of the tilling claws 5. Are arranged at equal intervals (120 degree intervals) in the circumferential direction of the rotor shaft 5. Thereby, as a whole of the rotor shaft 5, the six tilling claws 6 are positioned at equal intervals (60-degree intervals) in the circumferential direction of the rotor shaft 5.

  Each tilling claw 6 is formed so as to extend while curving from the rotor shaft 5 toward the lower side in the rotational direction. Thereby, at the time of an operation | work, each tilling nail | claw 6 will be driven in an uncultivated land part in order from the part of the rotation direction upper side with the small extension amount to the outside, and will plow an uncultivated land part. As a result, even when the uncultivated land portion is hard, the impact when the tilling claws 6 are driven into the uncultivated land portion is reduced.

A cylindrical shaft 7 that is externally fitted to the axle of the walking work machine is provided at the center of the rotor shaft 5 on the right end side (one end side). The axle shaft and the cylindrical shaft 7 are provided with connecting holes (not shown) that allow insertion of connecting pins 8 that connect the axle shaft and the cylindrical shaft 7 so as to be integrally rotatable. An insertion hole (not shown) that allows the connection pin 8 to be inserted is formed in a pair of predetermined locations facing the connection hole of the cylindrical shaft 7 in the rotor shaft 5. A pin hole (not shown) for inserting a retaining pin is formed at the insertion end of the connecting pin 8.

  Thus, after the cylindrical shaft 7 of the tillage rotor 2 is fitted on the axle of the walking type work machine, the connecting pin 8 is inserted into the insertion hole 5A of the rotor shaft 5, the connecting hole of the cylindrical shaft 7, and the connecting hole of the axle. Then, by inserting a retaining pin (not shown) into the pin hole of the connecting pin 8, the tilling rotor 2 can be detachably mounted on the axle.

  A hexagonal cylinder shaft 9 is provided at the center of the rotor shaft 5 on the left end side (the other end side). At the left end portion of the rotor shaft 5, a bracket 10 having a connecting hole 10A is erected.

  As shown in FIGS. 1 to 4, the rotor plate 3 includes three extending portions 3 </ b> A that extend outward in the radial direction and are positioned at equal intervals (120-degree intervals) in the circumferential direction. It is formed in a comet shape (an example of a substantially triangular shape). Each extending portion 3A is curved so as to be positioned on the right side (rotor shaft side) toward the extending end side. A hexagonal shaft 11 fitted inside the hexagonal cylinder shaft 9 of the rotor shaft 5 is provided at the center of the rotor plate 3. On the outer peripheral side of the rotor plate 3, a connecting pin 12 inserted through the connecting hole 10 </ b> A of the rotor shaft 5 is provided so as to protrude rightward. A pin hole 12 </ b> A for inserting a retaining pin is formed in the protruding end of the connecting pin 12.

  Thereby, the hexagonal shaft 11 of the rotor plate 3 is fitted into the hexagonal cylinder shaft 9 of the rotor shaft 5, and the connecting pin 12 of the rotor plate 3 is inserted into the connecting hole 10 </ b> A of the rotor shaft 5. By inserting a retaining pin (not shown) into the pin hole 12A, the rotor plate 3 can be detachably attached to the left end portion (the other end portion) of the rotor shaft 5.

  The hexagonal shaft 11 of the rotor plate 3 is provided with an insertion hole 11A that allows the support shaft 4 to be inserted at the center thereof so as to function as a shaft support portion that supports the support shaft 14 of the moving wheel 4 so as to be relatively rotatable. It is.

  The rotor plate 3 has two through-holes 3B at respective positions separated by a rotation angle of 60 degrees in the circumferential direction of the rotor plate 3 from the center of the extension 3A so as to sandwich one extension 3A. Is formed. Each through-hole 3B has an arc shape with the center of curvature of the rotor plate 3 as the center of curvature, and is formed to have an enlarged diameter portion 3a at the center in the longitudinal direction.

  The moving wheel 4 is configured by attaching a rubber tire 16 to a spoke-type wheel 15 having a support shaft 14 at the center. On the base end side of the support shaft 14, a bracket 17 having a pair of arms 17A, which is separated from the support shaft 14 by a rotation angle of 120 degrees, is provided. At the tip of each arm portion 17A, a protruding portion 18 that is parallel to the support shaft 14 and extends in the same direction is arranged so that the rotor plate 3 can be inserted into the corresponding through hole 3B. . Each protrusion 18 is provided with a large-diameter head 18A that is allowed to be inserted into the through hole 3B of the rotor plate 3 only at the enlarged diameter part 3a at the protruding end, and on the base side thereof, the arc of the through hole 3B. It is formed so as to have a small diameter portion 18B that is allowed to be engaged with the portion 3d.

  Thus, when the moving wheel 4 is attached, the rotor plate 3 is set in the rotational direction so that the extending portion 3A sandwiched between the two through holes 3B faces upward. The two through-holes 3B can be positioned on the upper side from the center of the rotor plate 3 at a position where the line of sight with respect to them is not easily blocked by the moving wheel 4 and is easily visible.

  Even when the line of sight with respect to the two through-holes 3B is blocked by the moving wheel 4, the positions of the two through-holes 3B can be easily estimated from the posture of the rotor plate 3 in the rotational direction. The holes 3B can be visually recognized quickly, and the through holes 3B of the rotor plate 3 and the protrusions 18 of the moving wheels 4 can be easily aligned.

  After the visual recognition, the support shaft 14 of the moving wheel 4 is inserted into the insertion hole 11A of the hexagonal shaft 11 of the rotor plate 3, and each protrusion of the moving wheel 4 is inserted into the enlarged diameter portion 3a of each through hole 3B of the rotor plate 3. After the head 18A of the portion 18 is inserted, the moving wheel 4 is rotated with respect to the rotor plate 3 with the support shaft 14 as a fulcrum, so that the moving wheel is attached to the rotor plate 3 without using a retaining tool such as a retaining pin. 4 can be easily attached.

    [Another embodiment]

[1] The tilling rotor 2 is arranged such that three tilling claws 6 are positioned at regular intervals (120 degree intervals) in the circumferential direction of the rotor shaft 5 on the substantially hexagonal rotor shaft 5 in side view. The three-claw specification configured may be used. Further, the tilling rotor 2 of the six-claw specification exemplified in the above embodiment is configured to be divided into two parts, a right half and a left half, each having three tilling claws 6, and only the right half is used. It is possible to change the specification into a three-claw specification and a six-claw specification using both the right half and the left half. In this two-divided structure, if the connecting structure of the right half and the left half of the rotor shaft 5 is the same as the connecting structure of the rotor shaft 5 and the rotor plate 3, the right half of the rotor shaft 5 The rotor plate 3 can be easily connected.

[2] The rotor shaft 4 may have a circular shape when viewed from the side, or may have a regular hexagonal shape when viewed from the side without the recess 4a.

[3] In the connection structure between the rotor shaft 4 and the rotor plate 3, a cylindrical shaft may be adopted instead of the hexagonal cylinder shaft 12, and a round shaft may be adopted instead of the hexagonal shaft 14.

[4] The rotor plate 3 has a substantially triangular shape including three extending portions 3a extending outward in the radial direction and positioned at equal intervals (120 degree intervals) in the circumferential direction. If there is, for example, as shown in (A) of FIG. 5, it may have a shape connecting two adjacent extending portions 3 a with a straight line, and as shown in (B) of FIG. 5, The thing of the shape connected with the curve which curved so that two adjacent extension parts 3a may bulge outward may be sufficient.

[5] As shown in FIG. 6A, each through hole 3B of the rotor plate 3 has an arc shape with the rotation center of the rotor plate 3 as the center of curvature, and the rotation direction of the rotor plate 3 in the longitudinal direction thereof. It may be formed so as to have an enlarged diameter portion 3a at the end on the upper side. Further, as shown in FIG. 6B, each through hole 3B of the rotor plate 3 is formed in a circular shape, and each protrusion 18 of the moving wheel 4 can be inserted into each circular through hole 3B. You may form in a headless shape. However, in this configuration, a retaining tool such as a retaining pin 19 that prevents the protrusions 18 from coming off from the through holes 3B is necessary.

[6] As the rotor plate 3, each extending portion 3 </ b> A may be a flat plate that is not curved so as to be positioned on the right side (rotor shaft side) toward the extending end side.

[7] The head 18A of each protrusion 18 in the moving wheel 4 may be formed in a conical shape having a smaller diameter toward the protruding end side.

  The present invention relates to an axle-driven rotor including a tilling rotor to be mounted on an axle of a walking work machine, a rotor plate to be mounted on the lateral outer end of the tilling rotor, and a moving wheel to be mounted on the lateral outer end of the rotor plate. Can be used for units.

2 Tillage Rotor 3 Rotor Plate 3A Extension 3B Through-hole 3a Expanding Diameter 4 Moving Wheel 11 Axis Support 14 Support Axis 18 Projection 18A Head

Claims (2)

A tilling rotor to be mounted on an axle of a walking type working machine, a rotor plate to be equipped at a laterally outer end of the tilling rotor, and a moving wheel to be equipped at a laterally outer end of the rotor plate,
The tillage rotor includes a rotor shaft,
The rotor shaft includes a square tube shaft at a central portion of the lateral outer end thereof,
The rotor plate is
A base part;
The base portion extends from the circumferentially spaced position in the circumferential direction in the radially outward direction, and is configured to be bent toward the tilling rotor side in the state where the rotor plate is mounted on the tilling rotor toward the extending end side. Three extended parts,
A through hole formed between the two extending portions in the circumferential direction of the base portion;
A round shaft as a shaft support portion that is provided at the center portion of the base portion, is fitted into the rectangular tube shaft, and supports the support shaft by inserting a support shaft composed of a round shaft of the moving wheel into the center portion. A square axis formed with a cylindrical insertion hole;
With
An axle-driven rotor unit, wherein the moving wheel is provided with a protrusion that allows the moving wheel to be prevented from coming off from the rotor plate by being inserted into the through hole.   When viewed from the direction of the rotation axis of the rotor plate, the distance between the rotation axis and the through hole is not more than ½ of the distance between the rotation axis and the extended end of the extension. 2. The axle drive type rotor unit according to claim 1, wherein

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