JP2014187941A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower capable of more simply grinding a cutter blade.SOLUTION: A mower includes: a mower deck 22; a cutter blade 23 that is provided inside the mower deck 22 and rotatively driven around a vertically-directed shaft center; an opening 30 that is formed in the mower deck 22 and from which a grinding tool 100 for grinding the cutter blade 23 is taken into the mower deck 22; and a lid member 31 that can switch the opening 30 between opened and closed states.

Description

  The present invention relates to a mower that includes a mower deck and a cutter blade provided inside the mower deck, the cutter blade being driven to rotate about a vertical axis.

  As the above mower, there is one described in Patent Document 1, for example. In this mower, a plurality of cutter blades are provided inside a mower deck that opens downward. The mower is supported by a lower part of the self-propelled aircraft via a lifting link.

JP 2009-213437 A

  By the way, in this type of mower, blade spillage or the like occurs in the blade portion of the cutter blade as the mower is used. For this reason, it is necessary to grind a cutter blade regularly. When grinding the cutter blade, it is necessary to remove the mower from the self-propelled machine body and to turn the mower upside down to expose the cutter blade.

  In view of the above problems, there is a demand for a mower capable of grinding a cutter blade more easily.

  The mower of the present invention is a mower deck, a cutter blade provided inside the mower deck, a cutter blade that is driven to rotate about a vertical axis, and an opening formed in the mower deck, An opening for receiving a grinding tool for grinding the cutter blade in the mower deck; and a lid member capable of switching the opening between an open state and a closed state.

  With this configuration, when mowing is driven and mowing the grass, the opening portion is closed with the lid member, and the mowing work can be performed in the same manner as in the conventional mower. On the other hand, when grinding the cutter blade, the cutter blade can be accessed from the opening by opening the opening, so there is no need to reverse the mower upside down to expose the cutter blade. . For this reason, it becomes possible to grind a cutter blade simply.

  The said structure WHEREIN: It is suitable when the said moor deck has a top plate and a side plate and the said opening part is formed in the said top plate. Further, it is preferable that the lid member is swingably supported by the top plate, and the lid member is swung downward to switch the opening from the closed state to the open state.

  With this configuration, the cutter blade can be reasonably accessed through the opening. Further, by swinging the lid member, the opening can be easily switched between the closed state and the open state.

  The said structure WHEREIN: It is suitable if the said cover member when the said opening part exists in an open state functions as a rotation prevention member which prevents rotation of the said cutter blade.

  With this configuration, the cutter blade can be prevented from rotating by the lid member when the cutter blade is ground. For this reason, it becomes possible to grind a cutter blade still more easily.

  The said structure WHEREIN: It is suitable when the recessed part which at least one part of the edge | side facing the edge | side in which the blade part in the said cutter blade was formed in the said cover member engages is formed.

  With this configuration, the cutter blade can be reliably prevented from rotating by engaging the concave portion of the lid member with the cutter blade.

1 is an overall side view of a riding mower equipped with a mower as an example of the present invention. 1 is an overall plan view of a riding mower. It is a perspective view which shows the vicinity part of the opening part of a mower. It is sectional drawing which shows the vicinity part of the opening part in a closed state. It is sectional drawing which shows the vicinity part of the opening part of the mower in an open state. It is a figure which shows the stand in a storage attitude | position. It is a figure which shows the stand in a use attitude | position. It is a figure which shows a part of mower of another Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of a riding mower provided with a mower 20 as an example of the present invention. FIG. 2 is an overall plan view of the riding mower. In the following description, the front in the front-rear direction of the self-propelled aircraft is referred to as front, and the rear side in the front-rear direction of the self-propelled aircraft is referred to as rear. Moreover, the right side in the width direction of the self-propelled aircraft when facing forward is referred to as right, and the left side is referred to as side. As shown in these drawings, the riding mower includes a pair of left and right front wheels 1 and 1 that can be steered and a pair of right and left rear wheels 2 and 2 that can be driven. In addition, a self-propelled aircraft equipped with a driving unit 5 having a driving seat 3 and a steering wheel 4 provided in front of the driving seat 3 is provided. A mower 20 is provided between the front wheel 1 and the rear wheel 2 below the body frame 6 of the self-propelled aircraft. In other words, this riding mower is a mid-mount riding mower. The mower 20 is connected to the vehicle body frame 6 via the link mechanism 7.

  The self-propelled airframe includes an engine 8 provided at the front of the airframe. The driving force of the output shaft 8a of the engine 8 is transmitted to the hydrostatic continuously variable transmission 10 by the transmission belt 9, and converted into forward driving force and reverse driving. The forward drive force and the reverse drive force are transmitted to the pair of left and right rear wheels 2 and 2. Further, the driving force of the output shaft 8 a of the engine 8 is transmitted to the mower 20 via the belts 70 and 71.

  The link mechanism 7 is swung up and down with respect to the vehicle body frame 6 by an elevating lever 11 provided in the operating unit 3. When the link mechanism 7 is swung, the mower 20 is moved up and down into a lowering work state in which the ground gauge wheel 21 is in contact with the ground and a non-working state in which the ground gauge wheel 21 is lifted from the ground. . When the mower 20 is in the descending work state and the self-propelled machine body is driven, the mower 20 is driven by the driving force of the engine 8 from the output shaft 8a. Mowing is performed by two cutter blades 23 positioned side by side in the vehicle body in the mower deck 22, and the mowing grass is discharged from the mower deck 22 to the outside.

  As shown in FIG. 2, the two cutter blades 23, 23 are provided one by one in each of the two cutting chambers 26, 26 provided in the cutting blade housing 22 and arranged in the vehicle width direction. These cutter blades 23 are rotatably supported on the top plate 22 a of the mower deck 22 via a rotation support shaft 27.

  As shown in FIGS. 1 and 2, each cutting chamber 26 is formed by a top plate 22 a and a side wall 22 b of the mower deck 22, a guide plate attached to the inside of the cutting blade housing 22, and the like. The mowing chamber 26 is substantially circular when viewed in the vertical direction of the cutting blade housing. The side wall 22 b of the cutting blade housing 22 and the guide plate are side walls of the cutting chamber 26. One mowing chamber 26 includes a discharge port 29 that opens toward the lateral outer side of the cutting blade housing 22 at one lateral end of the cutting blade housing 22. The pair of mowing chambers 26 and 26 communicate with each other at the central portion of the mower deck 22 in the lateral direction (machine width direction).

  As shown in FIGS. 2 and 3, the top plate 22 a is formed with an opening 30 for receiving the grinding tool 100 (see FIG. 5) in the mower deck 22 when the blade of the cutter blade 23 is ground. Yes. In the present embodiment, the opening 30 is formed at two locations corresponding to the cutter blades 23 and 23. The opening 30 is formed in the outer portion of the mower 20 in the body width direction. That is, it is formed at a position that does not overlap with the self-propelled machine body in a top view.

  In addition, the opening part 30 may be formed in the position which overlaps with a self-propelled body below a self-propelled body, ie, a top view. Even in this case, for example, it is possible to access the interior of the mower deck 22 from the opening 30 only by detaching the mower 20 from the self-propelled aircraft and setting the ground. For this reason, for example, since the grinding operation can be performed without reversing the top and bottom of the mower 20 to expose the cutter blade 23, the cutter blade 23 can be easily ground as compared with the conventional case.

  In the above embodiment, an example in which the opening 30 is formed corresponding to each cutter blade 23 is shown. However, for the cutter blade 23 having an accessible opening other than the opening 30, the opening 30 is set. It does not have to be formed. For example, the mower 20 is a side discharge type mower, and the right cutter blade 23 can be accessed from the discharge port 29. Accordingly, only the opening 30 corresponding to the left cutter blade 23 may be formed.

  As shown in FIG. 4, these openings 30 are closed by a lid member 31 at normal times (except when the cutter blade 23 is ground). In the present embodiment, the lid member 31 is provided to be swingable around the axis P1. Normally, the opening 30 is closed by the lid member 31 coming into contact with the top plate 22a from the inside of the mower deck 22. When grinding the cutter blade 23, the lid member 31 is swung downward (on the side away from the top plate 22a), and the opening 30 is opened. As described above, the position of the lid member 31 is changed between the closed posture in which the opening 30 is closed and the open posture in which the opening 30 is opened.

  A recess 33 is formed on the upper surface of the lid member 31. The concave portion 33 engages with the long side opposite to the blade portion of the cutter blade 23 when the lid member 31 is in the open posture. Thus, the lid member 31 when the opening 30 is in the open state functions as a rotation preventing member that prevents the cutter blade 23 from rotating (see FIG. 5).

  As shown in FIGS. 3 and 4, in this embodiment, the bolt 35 and the nut 36 are fastened across the top plate 22a and the lid member 31, whereby the lid member 31 is maintained in the closed posture. That is, the top plate 22a and the lid member 31 are formed with holes 37 and 38 for bolt insertion. A nut 36 is fixed to the lower surface of the lid member 31 (the surface facing the inner side of the mower deck 22) corresponding to the position of the hole 38. The bolt 35 is inserted into the hole 37 and the hole 38, and the bolt 35 is screwed into the nut 36, whereby the lid member 31 is fixed in the closed position. As shown in FIG. 5, in the open posture, the tip of the lid member 31 is grounded, so that the posture of the lid member 31 is maintained. In addition, a stopper or the like may be provided in the vicinity of the shaft core P1 so that the posture of the lid member 31 is maintained without being grounded.

  Hereinafter, an example of the grinding operation of the cutter blade 23 in the mower 20 will be described. First, the mower 20 is placed in a descending work state in which the ground gauge wheel 21 is in contact with the ground. In this state, as shown in FIG. 3, by removing the bolt 35, the lid member 31 fixed in the closed posture can be swung. As shown in FIG. 5, the lid member 31 is swung downward to ground the tip of the lid member 31. Thereby, the lid member 31 is in the open posture, and the opening 30 is in the open state. A grinding tool 100 such as a grinder is inserted into the mower deck 22 from the opening 30 to grind the blade portion of the cutter blade 23. At this time, the cutter blade 23 is engaged with the concave portion 33 of the lid member 31 in the open posture, and the cutter blade 23 is prevented from rotating.

  As shown in FIGS. 1, 6, and 7, the riding mower includes a stand 40 on which a fuel can, a tool box, a blower, and the like can be placed, for example. The stand 40 has a retracted position (see FIG. 6) positioned within the width of step 15 in the width direction of the machine body and a use position (see FIG. 7) pulled out from the stored position in the width direction of the body. The posture can be changed.

  As shown in FIGS. 6 and 7, a part of one side of the step 15 (left side in the present embodiment) is cut away to form a stand storage space S that opens upward and laterally. A stand 40 is stored in the stand storage space S. The stand 40 includes a main body 50 and a lid body 60. The main body 50 includes a bottom plate 51 and side plates. The side plate includes an outer plate 52 located on the side of the step among the bottom plate 51, a front plate 53 located on the front side in the longitudinal direction of the machine body, and a rear plate 54 located on the rear side in the machine body longitudinal direction. A handle 56 is provided on the outer plate 52. The main body 50 is provided with a pair of arm members 55 and 55. These arm members 55, 55 are supported in the vicinity of the outer side plate 52 of the front side plate 53 and the rear side plate 54 so as to be swingable around the longitudinal axis P2. An engaging recess 55 a that engages with the rod 66 provided in step 15 is formed at the tip of the arm member 55.

  The lid 60 includes a top plate 61 and side plates. The side plate includes an outer side plate 62, a front side plate 63, and a rear side plate 64 as in the case of the main body. A handle 65 is provided on the top plate. The lid 60 is set to a size slightly smaller than the main body 50, and the lid 60 enters the main body 50 in the retracted posture. The lid body 60 is supported on the inner side portions of the front side plate 53 and the rear side plate 54 of the main body 50 so as to be swingable about the front and rear axis P3.

  The stand 40 is stored in the storage space S in the storage position. That is, in the storage posture, the lid body 60 enters the main body 50 with the top plate 61 positioned upward. Further, the arm members 55 and 55 are in a state along the front side plate 53 and the rear side plate 54. The main body 50, the lid body 60, and the arm member 55 are stored in the storage space in the above posture. In the storage posture, the top plate 61 of the lid body 60 is positioned in a portion that opens upward in the storage space S, and the outer plate 52 of the main body 50 is positioned in a portion that opens laterally.

  The stand 40 in the storage position is changed to the use position by the following procedure. That is, first, the stand 40 is pulled out from the storage space S. Thereafter, the lid body 60 is swung upward so that the bottom plate 51 and the top plate 61 are in a substantially vertical posture. The arm member 55 is swung to the side away from the front side plate 53 and the rear side plate 54, and the respective engagement recesses 55 a are engaged with the rods 66. Thereby, the stand 40 is held in the use posture.

  A riding-type mower equipped with such a stand 40 can be used as a riding-type blower by placing a blower on the stand 40, for example. That is, by running the self-propelled body of the riding mower while operating the blower, for example, the grass and fallen leaves can be blown in one direction and collected by the wind power of the blower. At this time, since the main body 50 of the stand 40 includes the side plates 52, 53, and 54, the blower can be reliably held on the stand 40 even when the self-propelled machine body is driven.

[Another embodiment]
(1) The opening for receiving the grinding tool 100 for grinding the cutter blade 23 in the mower deck 22 is not limited to the above-described form. For example, it may be as shown in FIG. In this embodiment, an opening 130 is formed in the side wall 22 b of the mower deck 22. In this embodiment, the lid member 131 is fixed to the moor deck 22 by bolts 135. That is, the bolt 135 is inserted over the hole portions 137 and 138 and fastened across the lid member 131 and the side plate 22b of the mower deck 22, so that the lid member 131 is fixed to the side plate 22b of the mower deck 22 and the opening 130. Becomes blocked. By removing the bolt 135 and removing the lid member 131 from the mower deck 22, the opening 130 is opened. When the opening 30 is formed on the top plate 22a of the mower deck 22, the opening 30 may be switched from the closed state to the open state by removing the lid member 31. Moreover, when forming the opening part 130 in the side wall 22b of the moor deck 22, you may comprise so that the cover body 131 may be rock | fluctuated and the opening part 130 may be switched to a closed state and an open state.

(2) In the above embodiment, the side discharge type mower provided with two cutter blades 23 has been described as an example, but the present invention is not limited to the above embodiment. For example, the present invention can be applied to mowers other than the above, such as the mower 20 having three cutter blades and the mower 20 having one cutter blade 20. Further, the present invention is not limited to the side discharge type mower, but can be applied to other mowers such as a rear discharge type moor and a mulching type mower.

(3) In the above embodiment, a mid-mount riding mower has been described as an example, but the present invention is not limited to the above embodiment. For example, the present invention can be applied to a mower other than the above, such as a front-mounted riding mower.

  The present invention is applicable to various mowers.

22 Moore deck 22a Top plate 22b Side plate 23 Cutter blade 27 Rotating support shaft (vertical axis)
30, 130 Openings 31, 131 Lid member 33 Recess 100 Grinding tool

Claims (5)

Moor deck,
A cutter blade provided inside the mower deck, which is driven to rotate about a vertical axis,
An opening formed in the mower deck for receiving a grinding tool for grinding the cutter blade in the mower deck;
A mower comprising a lid member capable of switching the opening between an open state and a closed state.   The mower according to claim 1, wherein the mower deck includes a top plate and a side plate, and the opening is formed in the top plate.   The mower according to claim 2, wherein the lid member is swingably supported by the top plate, and the lid member is pivoted downward to switch the opening from the closed state to the open state.   The mower according to claim 3, wherein the lid member when the opening is in an open state functions as a rotation preventing member that prevents the cutter blade from rotating.   The mower according to claim 4, wherein the lid member is formed with a recess that engages with at least a part of a second side that faces a first side where a blade portion of the cutter blade is formed.

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