JP6190776B2 - Axle mounting structure of mowing rotor - Google Patents

Description

  The present invention relates to an axle mounting structure of a mowing rotor that is attached to an axle of a management machine and performs mowing work by rotating with the rotation of the axle.

  Conventionally, as a mowing rotor mounted on a management machine, a connecting shaft connected to an axle and a connecting shaft wound in the axial direction of the connecting shaft at a distance from the connecting shaft in the radial direction of the connecting shaft. A plurality of cutting blades that are spaced apart from each other in the circumferential direction of the connecting shaft, a connecting portion that connects the end of the connecting shaft on the transmission case side and the cutting blade, and a connecting case on the transmission case side of the connecting shaft. A so-called spiral rotor is known that has a connecting protrusion that is provided at the end and protrudes toward the transmission case from a portion where the connecting portion of the connecting shaft is located (see, for example, Patent Document 1).

  When the mowing rotor is mounted on the management machine, the connecting protrusion and a part of the axle are exposed between the transmission case of the management machine and the connecting part of the mowing rotor. For this reason, in the management machine equipped with the mowing rotor, when the mowing operation is performed, the mowing grass is wound around the connecting projection and the axle to rotate, and resistance of the axle is rotated. Therefore, in the management machine to which the mowing rotor is mounted, when the amount of grass that winds around the connecting protrusion or the axle increases, the axle becomes difficult to rotate, and it is difficult to continue the mowing work. In this case, the user of the management machine needs to monitor the state of the connection protrusion and the axle and remove the grass wound around the connection protrusion and the axle, which reduces work efficiency.

  Therefore, in order to prevent grass from winding around the connecting projection and the axle during mowing work, the outer side of the connecting projection and the connecting shaft between the transmission case and the connecting portion in a state where the connecting shaft is connected to the axle. It is conceivable to provide a shaft cover that surrounds in the circumferential direction.

  Since a part of the mowing rotor contacts the shaft cover, when the mowing rotor rotates, a rotational force acts on the shaft cover in the rotation direction of the mowing rotor. For this reason, the shaft cover is provided with a rotation restricting portion that restricts rotation with the mowing rotor.

Japanese Utility Model Publication No. 63-167803

  However, the shaft cover is provided with a rotation restricting portion that can be engaged with an uneven portion on the outside of the mission case, and the rotation restricting portion is engaged with the uneven portion of the mission case to restrict the rotation. Since the mission case of the management machine has a different shape depending on the type, it is necessary to use a shaft cover provided with a rotation restricting portion having a different shape for each shape of the mission case.

  An object of the present invention is to provide an axle mounting structure of a mowing rotor that allows a shaft cover to be mounted on various types of management machines.

  In order to achieve the above object, the present invention provides an axle mounting structure for a mowing rotor which is attached to each of the axles protruding from both sides in the width direction of the mission case of the management machine and performs mowing work by rotating together with the axle. The mowing rotor is connected to the connecting shaft connected to the axle, and extends linearly or winds around the connecting shaft in the radial direction of the connecting shaft in the radial direction of the connecting shaft and is connected to each other. A plurality of cutting blades provided at intervals in the circumferential direction of the shaft, a connection portion connecting the transmission shaft side end portion of the coupling shaft and the cutting blade, and a transmission case side end portion of the coupling shaft. A connecting protrusion that protrudes toward the transmission case from the portion where the connecting portion of the connecting shaft is located, and in a state where the connecting shaft is connected to the axle, between the transmission case and the connecting portion, A shaft cover that surrounds the outer periphery of the shaft and the connecting projection in the circumferential direction is provided, and the outer periphery of the shaft cover is attached to one side in the width direction of the transmission case, and the other side from the one side in the width direction of the transmission case. A rotation restricting portion that is provided so as to extend to the side and is connectable to a shaft cover attached to the other side in the width direction of the transmission case and that restricts rotation of the shaft cover by contacting the transmission case is provided.

  As a result, the rotation restricting part that connects the shaft covers on both sides in the width direction of the transmission case abuts against the transmission case to restrict the rotation of the axial cover. It can be attached to the case.

  According to the present invention, since the shaft cover can be attached to the mission case regardless of the shape of the mission case, the shaft cover can be attached to various types of management machines.

1 is an overall perspective view of a management machine equipped with a spiral rotor according to an embodiment of the present invention. It is a principal part perspective view of the management machine for demonstrating a mission case and an axle. It is a principal part perspective view of the management machine which shows the state by which the spiral rotor was mounted | worn to the axle. It is a principal part perspective view of the management machine for demonstrating the mounting state of a shaft cover. It is principal part sectional drawing which shows the attachment structure with respect to the axle shaft of a spiral rotor. It is a principal part exploded sectional view which shows the attachment structure with respect to the axle shaft of a spiral rotor. It is a side view of a shaft cover. It is the figure which looked at the axis | shaft cover from the rotation control part side. It is a side view of the axis | shaft cover which shows other embodiment of this invention.

  1 to 8 show an embodiment of the present invention. In addition, the description which represents the front-back direction, the left-right direction (width direction), and an up-down direction in this embodiment respond | corresponds to the front-back direction, the left-right direction (width direction), and the up-down direction of the management machine with which the spiral rotor as a mowing rotor is mounted. It shall be.

  As shown in FIG. 1, the management machine 1 includes a frame 2 that extends in the front-rear direction, an engine 3 that is provided at the top of the frame 2, and a mission case 4 that is provided at the bottom of the frame 2 so as to extend downward. A pair of left and right handles 5 extending obliquely upward rearward from the frame 2, an output adjustment lever 6 provided on the right handle 5, and a clutch lever 7 provided on the left handle 5 are provided. As shown in FIG. 2, the management machine 1 includes axles 8 that extend outward in the width direction on both sides in the width direction of the mission case 4. A spiral rotor 10 is detachably attached to each axle 8.

  The engine 3 is started by operating the recoil starter 3 a shown in FIG. 1, and the rotation speed is adjusted by operating the output adjustment lever 6. The power of the engine 3 is transmitted to the axle 8 through the mission case 4 to rotate the axle 8. The rotational speed of the axle 8 changes according to the rotational speed of the engine 3 adjusted by the operation of the output adjustment lever 6. The power of the engine 3 is switched between transmission of power to the axle 8 and interruption of transmission of power by operating the clutch lever 7. The spiral rotor 10 attached to the axle 8 rotates together with the axle 8.

  As shown in FIG. 3, the spiral rotor 10 includes a connecting shaft 11 connected to the axle 8, and a connecting shaft toward the connecting shaft 11 in the radial direction of the connecting shaft 11 in the radial direction of the connecting shaft 11. 11, the spiral blade 12 serving as a plurality of cutting blades spaced apart from each other in the circumferential direction of the connecting shaft 11, and the transmission case 4 side of the connecting shaft 11 and the mission case 4 of the spiral blade 12. An axle side connection portion 13 as a connection portion for connecting the side, and an outer connection portion 14 for connecting the outer side in the width direction of the management machine 1 of the connecting shaft 11 and the outer side in the width direction of the management machine 1 of the spiral blade 12. Have.

  As shown in FIGS. 5 and 6, the connecting shaft 11 is formed with a cylindrical connecting recess 11 a into which the axle 8 can be inserted on the transmission case 4 side in the axial direction. The axle shaft 8 and the coupling recess 11a are formed with coupling holes 8a and 11b penetrating in a direction orthogonal to the axial direction. The spiral rotor 10 is mounted on the axle 8 by inserting the axle shaft 8 into the coupling recess 11a, aligning the coupling holes 8a and 11b, inserting the coupling pin 15, and attaching the snap pin 15a to the coupling pin 15. Further, a connecting projection 11 c that protrudes from the axle side connecting portion 13 to the transmission case 4 side is provided at the end of the connecting shaft 11 on the transmission case 4 side in the axial direction.

  As shown in FIGS. 5 and 6, the connecting protrusion 11 c surrounds the outer end of the connecting shaft 11 on the transmission case 4 side and the outer end of the connecting shaft 11 on the transmission case 4 side in the circumferential direction. A cylindrical portion 11d provided on the inner peripheral side of the shaft cover, which will be described later, and an extension that extends radially outward from the end on the axle side connecting portion 13 side of the cylindrical portion 11d in the circumferential direction. Part 11e.

  As shown in FIG. 3, the spiral blade 12 is a plate-like member extending in the axial direction of the connecting shaft 11. The spiral blade 12 extends obliquely from the end on the transmission case 4 side of the connecting shaft 11 toward the end on the outer side in the width direction toward the opposite side to the rotational direction. Therefore, the spiral rotor 10 mounted on one side in the width direction of the mission case 4 and the spiral rotor 10 mounted on the other side in the width direction of the mission case 4 are formed with reference to the end portion on the mission case 4 side of the spiral blade 12. The winding direction is opposite to each other.

  As shown in FIG. 3, the axle-side connecting portion 13 includes a plurality of spokes 13 a that radially extend from the outer peripheral portion of the connecting shaft 11 to the radially outer side of the connecting shaft 11, and a radially outer side of the connecting shaft 11 of each spoke 13 a. And an annular ring 13b for connecting the end portions to each other. Each spoke 13 a extends from the outer periphery of the connecting shaft 11 in a direction perpendicular to the axis of the connecting shaft 11, and is bent and extends obliquely toward the connecting protrusion 11 c in the axial direction of the connecting shaft 11. The central portion of the space surrounded by the ring 13 b is coaxial with the axis of the connecting shaft 11. The end of the spiral blade 12 on the transmission case 4 side is fixed to the outer periphery of the ring 13b.

  As shown in FIG. 3, the outer connecting portion 14 is a disk-shaped member provided with a plurality of projecting portions 14 a extending radially outward of the connecting shaft 11 at intervals in the circumferential direction. The outer connection portion 14 has a radial center portion fixed to the connecting shaft 11 and an end portion on the outer side in the width direction of the spiral blade 12 fixed to the front side in the rotation direction of the protruding portion 14a.

  Further, when the spiral rotor 10 is attached to the axle 8 of the management machine 1, as shown in FIG. 4, the base end portion of the axle 8 and the connecting projection 11c are interposed between the transmission case 4 and the axle side connection portion 13. A shaft cover 20 is attached that surrounds the outer peripheral side of the shaft in the circumferential direction.

  As shown in FIGS. 7 and 8, the shaft cover 20 is provided so as to extend in the radial direction of the cover body 21 from the outer peripheral portion of the cover body 21 and the cover body 21 formed in a cylindrical shape. And a pair of rotation restricting portions 22 for restricting the rotation of the cover main body 21 accompanying the rotation of the cover main body 21.

  As shown in FIGS. 5 and 6, an inner flange 21 a that extends inward in the radial direction of the cover main body 21 is provided at the end of the cover main body 21 on the transmission case 4 side. Further, an outer flange 21b is provided at the end of the cover main body 21 on the axle side connecting portion 13 side and extends radially outward of the cover main body 21 in the circumferential direction.

  The inner flange 21 a faces a portion of the mission case 4 located on the outer peripheral side of the axle 8 in a state where the shaft cover 20 is attached between the mission case 4 and the spiral rotor 10. In addition, the outer peripheral side of the axle 8 of the transmission case 4 extends in the circumferential direction on the inner peripheral portion of the inner flange 21a with the shaft cover 20 attached between the transmission case 4 and the spiral rotor 10. An annular convex portion 4a extending in the direction is fitted. As shown in FIG. 5, the shaft cover 20 is positioned in the radial direction of the axle 8 by fitting the annular convex portion 4 a to the inner peripheral portion of the inner flange 21 a.

  The outer flange 21 b faces the extended portion 11 e of the connecting protrusion 11 c of the spiral rotor 10 in a state where the shaft cover 20 is attached between the mission case 4 and the spiral rotor 10. As shown in FIG. 5, when the outer flange 21 b comes into contact with the extending portion 11 e, the shaft cover 20 is restricted from moving axially outside the axle 8.

  Each of the pair of rotation restricting portions 22 is made of a linear member. The pair of rotation restricting portions 22 are provided at positions facing each other in the circumferential direction of the cover main body 21. Each rotation restricting portion 22 extends obliquely to the mission case 4 side with the shaft cover 20 attached between the mission case 4 and the spiral rotor 10, and the front end side or the rear side of the mission case 4 is bent at the front end side. It extends in the width direction.

  As shown in FIG. 7, in the state where the shaft cover 20 is disposed on both sides in the width direction of the transmission case 4, the rotation restricting portion 22 and the width of the one shaft cover 20 in the width direction are disposed at the distal ends of the rotation restricting portions 22. A connecting portion 22a for connecting the rotation restricting portion 22 of the other shaft cover 20 in the direction is provided.

  The connecting portion 22 a is provided at one end portion of the rotation restricting portion 22 that is connected to each other, and is provided at the holding portion 22 b that holds the tip end portion of the other rotation restricting portion 22, and the tip portion of the other rotation restricting portion 22 And a held portion 22c held by the holding portion 22b of one rotation restricting portion.

  In the shaft cover 20 of the present embodiment, a holding portion 22b is provided in one rotation restricting portion 22, and a held portion 22c is provided in the other rotation restricting portion 22.

  The holding part 22b has a cylindrical shape extending in the width direction, and the held part 22c can be inserted from the opening of the tip part.

  The held portion 22c is a linear member having the same radial dimension as that of the rotation restricting portion 22, and can be inserted into the opening at the tip of the holding portion 22b.

  In the management machine 1, the spiral rotor 10 and the shaft cover 20 configured as described above, a case where the spiral rotor 10 is mounted on the management machine 1 will be described.

  First, the annular protrusion 4a of the mission case 4 of the management machine 1 is fitted to the inner peripheral portion of the inner flange 21a, and the shaft covers 20 are attached to both sides in the width direction of the mission case 4 as shown in FIG. When attaching the shaft covers 20 to both sides of the transmission case 4 in the width direction, as shown in FIG. 7, the held portions 22c of the other shaft cover 20 are inserted into the holding portions 22b of the one shaft cover 20, and the By inserting the held portion 22 c of the shaft cover 20 into the holding portion 22 b of the other shaft cover 20, the pair of width direction shaft covers 20 are connected to each other.

  Next, the connecting protrusion 11c of the spiral rotor 10 is inserted into the cover body 21 of each shaft cover 20, the connecting hole 8a of the axle 8 and the connecting hole 11b of the connecting recess 11a are aligned, and the connecting pins 8a and 11b are connected to the connecting pin. 15 is inserted and the snap pin 15a is attached to the connecting pin.

  When mowing work is performed by the management machine 1 to which the spiral rotor 10 and the shaft cover 20 are attached, the spiral rotor 10 rotates in a direction in which the management machine 1 is advanced. Thereby, the grass growing on the ground is cut by the spiral blade 12 of the rotating spiral rotor 10. At this time, the extending portion 11e of the connecting projection 11c of the spiral rotor 10 contacts the shaft cover 20, and the rotating force of the spiral rotor 10 is transmitted. However, the rotation of the shaft cover 20 is restricted when the rotation restricting portion 22 located on the rear side of the mission case 4 contacts the mission case 4. As a result, the connecting protrusion 11c of the rotating spiral rotor 10 and the base end side of the axle 8 are surrounded by the shaft cover 20 whose rotation is restricted, and the cut grass is the base end of the connecting protrusion 11c and the axle 8. It does not wrap around the side.

  As described above, according to the axle mounting structure of the mowing rotor of the present embodiment, the width direction one side of the mission case 4 is attached to the outer peripheral portion of the shaft cover 20 on the one side in the width direction of the mission case 4. Rotation restricting portion that is provided so as to extend to the other side of the transmission case and can be connected to the shaft cover 20 attached to the other side in the width direction of the transmission case 4 and restricts the rotation of the shaft cover 20 by contacting the transmission case 4 22 is provided.

  As a result, the shaft cover 20 can be attached to the mission case 4 regardless of the shape of the mission case 4, so that the shaft cover 20 can be attached to various types of management machines 1.

  In addition, a plurality of rotation restricting portions 22 are provided on the outer peripheral portion of the cover main body 21 at intervals from each other on the outer peripheral portion of the cover main body 21.

  As a result, the cover main bodies 21 on both sides in the width direction of the mission case 4 can be connected at a plurality of locations in the circumferential direction of the cover main body 21, so that the attached state of the cover main body 21 can be stabilized.

  In addition, a pair of rotation restricting portions 22 are provided on the outer peripheral portion of the cover main body 21 at intervals in the circumferential direction of the cover main body 21, and the pair of rotation restricting portions 22 are mutually connected in the circumferential direction of the cover main body 21. It is provided at a position to oppose.

  Thereby, since the cover body 21 on both sides in the width direction of the transmission case 4 can be stabilized in the mounting state of the cover body 21 by the pair of rotation restricting portions 22, the shaft cover 20 can be easily attached and the cover The attachment state of the main body 21 can be stabilized.

  One of the rotation restricting portions 22 connected to each other is provided with a holding portion 22b capable of holding the other rotation restricting portion 22, and the other rotation restricting portion 22 is held by the holding portion 22b. A portion 22c is provided.

  Thereby, it becomes possible to connect rotation control parts without using the member for connecting rotation control parts 22 separately, and it becomes possible to aim at reduction of a number of parts.

  One of the rotation restricting portions 22 connected to each other is provided with a holding portion 22b capable of holding the other rotation restricting portion 22, and the other rotation restricting portion 22 is held by the holding portion 22b. A portion 22c is provided, and the shaft cover 20 is provided with a rotation restricting portion 22 provided with a holding portion 22b and a rotation restricting portion 22 provided with a held portion 22c.

  As a result, the same shaft cover 20 can be used on both sides of the mission case 4 in the width direction, so that the manufacturing cost can be reduced.

  FIG. 9 shows another embodiment of the present invention. In addition, the same code | symbol is attached | subjected and shown to the component similar to the said embodiment.

  As shown in FIG. 9, the shaft covers 20a and 20b of the present embodiment are provided with holding portions 22b on both of the pair of rotation restricting portions 22 of one shaft cover 20a in the width direction, and the shaft cover 20b on the other side in the width direction. A held portion 22 c is provided on both of the pair of rotation restricting portions 22.

  In the shaft covers 20a and 20b configured as described above, by inserting the held portion 22c of the other shaft cover 20 into the holding portion 22b of the one shaft cover 20a, as in the above embodiment, the width direction The pair of shaft covers 20a and 20b can be connected to each other.

  Thus, also in the axle mounting structure of the spiral rotor of the present embodiment, the outer periphery of the shaft cover 20a is attached to one side in the width direction of the transmission case 4 from one side in the width direction of the transmission case 4. Rotation restriction that is provided so as to extend to the other side and can be connected to a shaft cover 20b attached to the other side in the width direction of the mission case 4 and restricts the rotation of the shaft covers 20a and 20b by contacting the mission case 4 A portion 22 is provided.

  As a result, the shaft cover 20 can be attached to the mission case 4 regardless of the shape of the mission case 4, so that the shaft cover 20 can be attached to various types of management machines 1.

  In the above-described embodiment, the shaft cover 20, 20a, 20b is provided with the pair of rotation restricting portions 22. However, the present invention is not limited to this. As long as the pair of cover main bodies 21 on both sides in the width direction of the mission case 4 are connected to each other, even with one rotation restricting portion 22 or three or more rotation restricting portions 22, Regardless of the shape of the mission case 4, the shaft cover 20 can be attached to the mission case 4.

  Moreover, although the connection part 22a which mutually connects rotation control part 22 was comprised in the said embodiment from the cylindrical holding part 22b and the linear to-be-held part 22c, it was limited to this. is not. If it is possible to connect the rotation restricting portions 22 to each other, for example, the end portions of the rotation restricting portions 22 may be connected to each other by separate members.

  Moreover, in the said embodiment, although the spiral rotor 10 provided with the spiral blade 12 as a cutting blade extended so that the connecting shaft 11 might be wound toward the axial direction of the connecting shaft 11 was shown, it is not restricted to this. The present invention is also applicable to a grass cutting rotor including a cutting blade that extends linearly in parallel with the axial direction of the connecting shaft 11, for example.

DESCRIPTION OF SYMBOLS 1 ... Management machine, 4 ... Mission case, 8 ... Axle, 10 ... Spiral rotor, 11 ... Connection shaft, 11c ... Connection protrusion, 12 ... Spiral blade, 13 ... Axle side connection part, 20 ... Shaft cover, 21 ... Cover A main body, 22 ... a rotation restricting portion, 22a ... a connecting portion, 22b ... a holding portion, 22c ... a held portion.

Claims (5)

Axle mounting structure of a mowing rotor that is attached to each of the axles protruding from both sides in the width direction of the mission case of the management machine and performs mowing work by rotating together with the axle,
The mowing rotor has a connecting shaft connected to the axle, and extends in a straight line or a manner to wind the connecting shaft in the axial direction of the connecting shaft at a distance from the connecting shaft in the radial direction of the connecting shaft, and is connected to each other. A plurality of cutting blades provided at intervals in the circumferential direction, a connection portion connecting the transmission shaft side end portion and the cutting blade of the coupling shaft, and a transmission shaft side end portion of the coupling shaft, A connecting protrusion that protrudes from the portion where the connecting portion of the connecting shaft is located toward the transmission case,
Between the transmission case and the connecting portion in a state where the connecting shaft is connected to the axle, a shaft cover that surrounds the outer peripheral side of the axle and the connecting protrusion in the circumferential direction is provided.
The outer periphery of the shaft cover is provided so as to extend from one side in the width direction of the mission case to the other side in a state attached to one side in the width direction of the mission case, and is attached to the other side in the width direction of the mission case. An axle mounting structure for a mowing rotor, characterized in that a rotation restricting portion that can be connected to the shaft cover and restricts the rotation of the shaft cover by contacting the transmission case is provided. The axle mounting structure of a mowing rotor according to claim 1, wherein a plurality of rotation restricting portions are provided on the outer peripheral portion of the shaft cover at intervals in the circumferential direction of the shaft cover. On the outer periphery of the shaft cover, a pair of rotation restricting portions are provided at intervals in the circumferential direction of the shaft cover,
The axle mounting structure for a mowing rotor according to claim 1, wherein the pair of rotation restricting portions are provided at positions facing each other in a circumferential direction of the shaft cover. One of the rotation restriction parts connected to each other is provided with a holding part capable of holding the other rotation restriction part,
The axle mounting structure of the mowing rotor according to any one of claims 1 to 3, wherein the other rotation restricting portion is provided with a held portion that is held by the holding portion. One of the rotation restriction parts connected to each other is provided with a holding part capable of holding the other rotation restriction part,
The other rotation restricting portion is provided with a held portion held by the holding portion,
The shaft mounting structure for a mowing rotor according to claim 3, wherein the shaft cover is provided with a rotation restricting portion provided with a holding portion and a rotation restricting portion provided with a held portion. .

Images