JP2019083767A - Mower - Google Patents

Abstract

To provide a mower capable of reducing the number of components and improving maintainability by improving front wheels and support mechanisms of the front wheels.SOLUTION: The mower includes: a machine body; a first mowing section disposed on one side in the machine-body width direction; a second mowing section disposed on the other side in the machine-body width direction and being swingable about a hinge shaft center extending in the longitudinal direction, with respect to the first mowing section; and a pair of front wheels including a first front wheel disposed in front of the first mowing section, and a second front wheel disposed in front of the second mowing section. The pair of front wheels have support mechanisms used in common thereby for supporting rotary shafts of the front wheels, with respect to the outside diameters, widths, and machine body.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a walking type mower.

DESCRIPTION OF RELATED ART Conventionally, the mower disclosed by patent document 1 is known.
The mowing machine disclosed in Patent Document 1 includes an airframe, a first mowing portion disposed on one side in the widthwise direction of the body, and an axis disposed on the other side in the widthwise direction of the body with respect to the first mowing portion. A second mowing portion capable of pivoting about a center, a front wheel disposed in front of the first mowing portion, and a ground ring disposed in front of the second mowing portion.

JP, 2015-130817, A

In the mowing machine disclosed in Patent Document 1, the front wheel is formed larger in diameter than the ground wheel. Therefore, it is necessary to manufacture two front wheels (front wheels and ground wheels) and supporting mechanisms for the respective front wheels as separate parts, and improvement in maintenance performance such as increasing the number of parts and replacement of wheels is desired. It was
SUMMARY OF THE INVENTION The present invention provides a mowing machine capable of reducing the number of parts and improving maintainability by improving the front wheel and the support mechanism for the front wheel in view of the prior art.

  A mowing machine according to one aspect of the present invention includes the machine body, a first mowing section arranged on one side in the machine body width direction, and the hinge axis centering on the other side of the machine body width direction and extending in the front and rear direction. It includes: a second mowing section swingable with respect to the first mowing section; a first front wheel disposed in front of the first mowing section; and a second front wheel disposed in front of the second mowing section A pair of front wheels is provided, and the pair of front wheels have an outer diameter and a width, and a common support mechanism for supporting the rotation shaft of the front wheels with respect to the body.

In addition, the machine body has a first housing that covers at least the upper side of the first mowing section, and a second housing that covers at least the upper side of the second mowing section, and the first front wheel is the first The first front wheel is disposed across the front and the rear of the front end of the one housing, and the second front wheel is disposed across the front and the aft of the front end of the second housing.
Further, a rotation axis of the first front wheel is disposed in front of the first housing, and a rotation axis of the second front wheel is disposed in front of the second housing.

  Further, the first housing has a first housing main body covering the upper side of the first mowing part, and a first front cover extended downward from the front end of the first housing main body, The second housing has a second housing main body covering the upper side of the second mowing section, and a second front cover extended downward from the front end of the second housing main body, and the first front The cover has a first cut portion cut upward from the lower end portion, the second front cover has a second cut portion cut upward from the lower end portion, and the first front wheel is The second front wheel is disposed across the front and the rear of the first cut portion, and the second front wheel is disposed across the front and the rear of the second cut portion.

Further, the first front cover and the second front cover are formed of a sheet made of an elastic material.
Further, the first front wheel and the second front wheel have non-slip projections projecting radially outward on the other side in the vehicle body width direction.
The support mechanism includes a first front wheel support arm attached to the first housing and supporting the first front wheel, and a second front wheel support arm attached to the second housing and supporting the second front wheel. , And the first front wheel support arm has a first grass covering preventing portion which becomes wider as it goes from the inner side to the outer side of the inner diameter of the first front wheel, and the second front wheel support arm (2) A second grass wrap preventing portion which becomes wider as it goes from the inner side to the outer side of the diameter of the front wheel.

  According to the mowing machine, the number of parts can be reduced and the maintainability can be improved by sharing the outer diameter and the width of the pair of front wheels and the support mechanism for supporting the rotation shaft of the front wheels with respect to the machine body. Can be

It is a top view of a mower. It is the side view which looked at a mowing machine from the right side. It is a rear view of a mower. It is the top view to which a part of mowing machine was expanded. It is the bottom view which expanded a part of mowing machine. It is the perspective view which expanded a part of mowing machine. It is the side view which expanded a part of mowing machine and was seen from the left. It is a longitudinal cross-sectional front view which shows a 1st power transmission mechanism and a 2nd power transmission mechanism. It is a bottom view which shows a 1st mowing part and a 2nd mowing part. It is a perspective view of a 1st mowing part. It is a vertical side view which shows a transmission and a 1st mowing part. It is a vertical side view which shows a 1st mowing part. It is a bottom view which shows the state which the 1st cutting blade of a 1st mowing part is rocking. It is the perspective view which looked at a pair of front wheels (1st front wheel, 2nd front wheel) and a support mechanism from right front. It is the perspective view which looked at a pair of front wheels (1st front wheel, 2nd front wheel) and a support mechanism from left front. It is a diagram showing composition of a drive mechanism. It is a cross-sectional top view which shows a transmission, a cutting blade clutch, a 1st transmission case (mission case), and a supporting member. It is a top view which shows a transmission, a cutting blade clutch, a 1st transmission case (mission case), and a supporting member. It is a top view which shows an accelerator lever and a cutting blade clutch lever. It is a side view showing an accelerator lever and a cutting blade clutch lever. It is sectional drawing of the A1-A1 part of FIG. It is a figure which shows the accelerator lever seen from the arrow A 2 direction of FIG. It is a top view which shows a speed-change lever and an adjustment lever. It is a side view which shows a shift lever and an adjustment lever, Comprising: It is a figure which shows a motion of a shift lever. It is a side view which shows a speed change lever and an adjustment lever, Comprising: It is a figure which shows a motion of an adjustment lever. It is a figure which shows the bracket and horizontal axis seen from the arrow A 3 direction of FIG. It is a figure showing the state where the angle of the 2nd housing to the 1st housing is changed. It is a longitudinal front view which shows the state which made the 2nd housing incline with respect to a 1st housing. It is the side view which expanded a part of mowing machine and looked at it from the right side. It is an enlarged plan view which shows the periphery of a grass discharge cover.

Hereinafter, embodiments of the present invention will be described based on the drawings.
FIGS. 1 to 3 are views showing the entire configuration of a mowing machine 1 according to an embodiment of the present invention.
First, the outline of the entire configuration of the mowing machine 1 will be described with reference to FIGS. 1 to 3.
The mowing machine 1 includes an airframe 2, a mowing section 3, wheels 4, a steering handle 5, and a driving mechanism 6.
Hereinafter, for convenience of explanation, the front side (direction of arrow A in FIG. 1 and FIG. 2) of the operator holding the control handle 5 is forward, and the rear side (direction of arrow B in FIG. 1 and FIG. The right side of the worker (in the direction of the arrow C in FIGS. 1 and 3) is described as the right, and the left side of the worker (in the direction of the arrow D in FIGS. 1 and 3) is described as the left. Further, a horizontal direction which is a direction orthogonal to the front-rear direction X (see FIGS. 1 and 2) will be described as a machine width direction Y (see FIGS. 1 and 3). Further, the direction from the central part of the fuselage 2 to the right or left part is called the extracorporeal direction. In other words, the outboard direction is the width direction of the vehicle and the direction away from the central portion of the vehicle 2. In addition, the direction opposite to the direction outside the aircraft is called the direction inside the aircraft. In other words, the inside of the vehicle is the width direction of the vehicle and is the direction approaching the central portion of the vehicle 2.

First, the entire configuration of the mowing machine 1 will be described.
The airframe 2 has a housing 7 and a hinge 8. The housing 7 includes a first housing 7A and a second housing 7B. The first housing 7A is disposed on one side (right side) in the machine body width direction. The second housing 7B is disposed on the other side (left side) in the machine width direction. The hinge 8 extends in the front-rear direction X, and connects the first housing 7A and the second housing 7B arranged in the vehicle width direction. The second housing 7B is pivotable about the central axis (hinge axis) C1 of the hinge 8 with respect to the first housing 7A.

  The mowing part 3 includes a first mowing part 3A and a second mowing part 3B. The first mowing part 3A is disposed on one side in the machine body width direction, and has a first cutting blade 33 that rotates around a longitudinal axis (an axis in the vertical direction). The second mowing section 3B is disposed on the other side in the machine body width direction, and has a second cutting blade 38 that rotates around a longitudinal axis (an axis in the vertical direction). The first mowing section 3A is covered by the first housing 7A. The second mowing section 3B is covered by a second housing 7B.

The wheel 4 includes a front wheel 4F and a rear wheel 4R. The front wheel 4F includes a first front wheel 4F1 and a second front wheel 4F2. The first front wheel 4F1 is disposed in front of the first mowing section 3A. The second front wheel 4F2 is disposed in front of the second mowing section 3B. The rear wheel 4R is disposed behind the first mowing section 3A.
The steering handle 5 is a handle for holding when the operator operates the mowing machine 1. The steering handle 5 extends rearward of the first housing 7A. It supports the first housing 7A and the rear wheel 4R.

The drive mechanism 6 is a mechanism for driving the rear wheel 4R and the mowing section 3. The drive mechanism 6 has a motor 10 as a drive source, and a power transmission mechanism for transmitting rotational power output from the motor 10 to the rear wheel 4R and the mowing section 3.
Hereinafter, the components of the mowing machine 1 will be described in detail.
First, the housing 7 (the first housing 7A, the second housing 7B) and the hinge 8 constituting the machine body 2 will be described.

As shown in FIGS. 2 and 4 to 6, the first housing 7 </ b> A has a first housing main body 71 and a first front cover 72.
The first housing main body 71 includes a first upper plate portion 71a, a first rear plate portion 71b, a first front plate portion 71c, and a first side plate portion 71d. The first upper plate portion 71a, the first rear plate portion 71b, the first front plate portion 71c, and the first side plate portion 71d are integrally formed of a rigid material such as metal.

  One surface (front surface) of the first upper plate portion 71a faces upward and the other surface (back surface) faces downward, and covers the upper side of the first mowing portion 3A. As shown in FIG. 2, the first rear plate portion 71 b is extended downward from the rear end portion of the first upper plate portion 71 a. The first rear plate portion 71b is inclined to shift rearward as it extends downward from the first upper plate portion 71a. As shown in FIGS. 4 and 5, the first rear plate portion 71b is disposed rearward of the first mowing portion 3A, and is shifted rearward as it goes inward (leftward) in plan view. .

As shown in FIG. 2, the first front plate portion 71 c extends upward and forward (diagonally upper front) from the front end portion of the first upper plate portion 71 a, and is positioned in front of the first mowing portion 3A. ing. The first side plate portion 71 d is extended downward from the right end portion of the first upper plate portion 71 a.
The first front cover 72 is formed of a sheet made of an elastic material such as rubber. As shown in FIG. 2, the first front cover 72 is extended downward from the front end of the first housing main body 71. Specifically, as shown in FIG. 6, the first front cover 72 is attached to the front end portion of the first front plate portion 71c with a bolt B1 and extends downward from the front end portion (drooping) ). The first front cover 72 is inclined to move forward as it goes downward. The length in the machine body width direction of the first front cover 72 is set to be equal to or greater than the length in the machine body width direction of the first housing main body 71. As shown in FIG. 4, in the case of the present embodiment, the right end of the first front cover 72 is substantially at the same position as the right end of the first housing main body 71 in the machine width direction. Is located to the left of the left end of the first housing body 71.

As shown in FIGS. 4 to 6, the first front cover 72 has a first cut portion 72 a which is cut upward from the lower end portion. The first cut portion 72a is formed in a substantially rectangular shape so as to surround the right, left, and upper sides of the first front wheel 4F1. The first cut portion 72 a exposes the first front wheel 4 F 1 forward from the first front cover 72.
As shown in FIGS. 4 to 7, the second housing 7 </ b> B includes a second housing main body 73 and a second front cover 74. In FIG. 7, the second front cover 74 is omitted for the convenience of illustration and description.

The second housing main body 73 includes a second upper plate portion 73a, a second rear plate portion 73b, a second front plate portion 73c, and a second side plate portion 73d. The second upper plate portion 73a, the second rear plate portion 73b, the second front plate portion 73c, and the second side plate portion 73d are integrally formed of a rigid material such as metal.
One surface (front surface) of the second upper plate portion 73a faces upward and the other surface (back surface) faces downward, and covers the upper side of the second mowing part 3B. The second rear plate portion 73b extends downward from the rear end portion of the second upper plate portion 73a. The second back plate portion 73b is disposed behind the second mowing portion 3B. The second front plate portion 73c extends upward and forward (diagonally and upward) from the front end portion of the second upper plate portion 73a, and is positioned in front of the second mowing portion 3B. The second side plate portion 73 d is extended downward from the left end portion of the second upper plate portion 73 a. As shown in FIG. 7, the second rear plate portion 73 b is inclined so as to shift to the rear as it extends downward from the second upper plate portion 73 a.

As shown in FIGS. 4 and 5, the boundary between the second side plate portion 73d and the second rear plate portion 73b (left rear portion of the second housing main body 73) is curved in an arc shape in plan view. Further, the second rear plate portion 73b is shifted rearward as it goes inward (rightward) in the plane view in plan view.
As shown in FIGS. 4 and 5, the second housing main body 73 is aligned with the first housing main body 71 in the machine body width direction, but is slightly offset from the first housing main body 71 in the front-rear direction. Specifically, the second rear plate portion 73b is disposed rearward of the first rear plate portion 71b in the front-rear direction. The second front plate portion 73c is disposed rearward of the first front plate portion 71c in the front-rear direction.

  The second front cover 74 is formed of a sheet made of an elastic material such as rubber. The second front cover 74 is extended downward from the front end of the second housing body 73. Specifically, as shown in FIG. 6, the second front cover 74 is attached to the front end portion of the second front plate portion 73c by a bolt B2 and extends downward from the front end portion (is hanging down) ). The second front cover 72 is inclined to move forward as it goes downward.

  As shown in FIGS. 4 and 5, the second front cover 74 is disposed rearward of the first front cover 72 in the front-rear direction. That is, the front end of the second front cover 74 is located rearward of the front end of the first front cover 72. The length in the machine body width direction of the second front cover 74 is set to be equal to or greater than the length in the machine body width direction of the second housing main body 73. In the case of the present embodiment, the left end of the second front cover 74 is substantially at the same position as the left end of the second housing main body 73 in the machine width direction, and the right end of the second front cover 74 is the right end of the second housing main 73 It is located to the right of the department. Thus, the first front cover 72 and the second front cover 74 overlap in the vicinity of the center in the machine width direction.

As shown in FIGS. 4 to 6, the second front cover 74 has a second cut portion 74 a that is cut upward from the lower end portion. The second cut portion 74a is formed in a substantially rectangular shape so as to surround the right, left, and upper sides of the second front wheel 4F2. The second cut portion 74 a exposes the second front wheel 4 F 2 forward from the second front cover 74.
As shown in FIGS. 4 and 6, the second housing 7B has a front guard 75. The front guard 75 is attached to the front of the second housing body 73. The front guard 75 is formed by bending a rod-like body made of a rigid material such as metal. The front guard 75 has a left member 75a, a right member 75b, and a front member 75c. The left member 75 a is fixed to the left end of the second housing body 73 and extends forward. The right member 75 b is fixed to the right end of the second housing body 73 and extends forward. The front member 75c is disposed in front of the second housing body 73 and extends in the width direction of the vehicle. The left portion of the front member 75c is shifted rearward toward the left, and is connected to the front portion of the left member 75a. The right portion of the front member 75c is connected to the front portion of the right member 75b. The front member 75 c is disposed forward of the first housing main body 71 in the front-rear direction. The right end of the front member 75 c is located in front of the first housing main body 71.

  As shown in FIGS. 4 to 6, the hinge 8 extends in the front-rear direction between the first housing 7A and the second housing 7B. The hinge 8 connects the left end of the first housing body 71 and the right end of the second housing body 73. As shown in FIG. 5, the hinge 8 has a first cylindrical portion 8a, a second cylindrical portion 8b, and a shaft portion 8c. The first cylindrical portion 8 a is fixed to the first housing main body 71. Specifically, two first cylindrical portions 8a are respectively welded to the front left edge and the rear left edge of the first upper plate portion 71a. The second cylindrical portion 8 b is fixed to the second housing main body 73. Specifically, two second cylindrical portions 8b are respectively welded to the front right edge and the rear left edge of the second upper plate 73a.

  The shaft portion 8c extends in the front-rear direction, and penetrates the first cylindrical portion 8a and the second cylindrical portion 8b. The first cylindrical portion 8a and the second cylindrical portion 8b are provided side by side in the front-rear direction, but are not provided near the center in the front-rear direction of the shaft portion 8c. Therefore, the shaft portion 8c is exposed without being covered by the first cylindrical portion 8a and the second cylindrical portion 8b in the vicinity of the center in the front-rear direction. Thus, the cylindrical portion (the first cylindrical portion 8a, the second cylindrical portion 8a, the second cylindrical portion 8b) does not cover the vicinity of the center of the shaft portion 8c in the front-rear direction. Since the overall length of the cylindrical portion 8 b) is shortened, the weight of the airframe 2 can be reduced.

  In the airframe 2, the first housing 7A and the second housing 7B are connected by the hinge 8, so that the second housing 7B rotates around the axis (hinge axis) C1 of the shaft portion 8c with respect to the first housing 7A. Can be rocked. Thereby, the angle of the second housing 7B with respect to the first housing 7A can be changed (adjusted). The operation of swinging the second housing 7B relative to the first housing 7A can be performed by an adjustment lever 150 described later.

Next, the 1st mowing part 3A and the 2nd mowing part 3B which comprise the mowing part 3 are demonstrated.
First, the first mowing section 3A will be described.
As shown in FIGS. 8 to 11, the first mowing part 3A has the first rotation shaft 31, the first support 32, the first cutting blade 33, and the first grass wrapping prevention member 34. doing.
As shown in FIG. 8, the first rotation axis 31 is an axis that rotates about an axis (first longitudinal axis) extending in the vertical direction. A cylindrical boss 35 is attached to the lower portion of the first rotation shaft 31. The first support 32 is attached to the lower part of the first rotation shaft 31 below the boss 35. As shown in FIG. 9, the first support 32 is a substantially rectangular plate in a plan view, the central portion of which is attached to the first rotation shaft 31, and the radial outer direction of the first rotation shaft 31 (shaft It is extended to one side and the other side of the direction away from the heart.

As shown in FIG. 11, the first support 32 has a center hole 32a, a tip hole 32b, and an intermediate hole 32c. The central hole 32 a is provided at the center of the first support 32. The tip holes 32 b are provided at one end and the other end of the first support 32 respectively. The middle hole 32c is provided between the center hole 32a and the tip hole 32b.
A male screw is formed at the lower end portion of the first rotation shaft 31. The male screw of the first rotary shaft 31 penetrates through the central hole 32a of the first support 32, and a nut N1 is screwed into the penetrated portion. Thus, the first support 32 is sandwiched and fixed between the nut N1 and the boss 35.

  As shown in FIGS. 10, 11 and the like, the first cutting blade 33 is attached to the first support 32. Specifically, the first cutting blade 33 is attached to one end side and the other end side of the first support 32 respectively. The first cutting blade 33 has a first upper blade 33U disposed above the first support 32 and a first lower blade 33D disposed below the first support 32. More specifically, the first cutting blade 33 at one end of the first support 32 and the first cutting blade 33 at the other end each have a first upper blade 33U and a first lower blade 33D. . That is, the first cutting blade 33 is configured of two first upper blades 33U and two first lower blades 33D. The first upper blade 33 </ b> U and the first lower blade 33 </ b> D have the same shape, and are disposed vertically symmetrical with respect to the first support 32.

  The first cutting blade 33 (first upper blade 33U and first lower blade 33D) has a base end 33a, a first extending portion 33b, and a second extending portion 33c. The proximal end 33 a is attached to the first support 32. The first extending portion 33 b extends in a direction away from the proximal end portion 33 a (a radial outer direction of the first rotation shaft 31). The first extending portion 33 b is inclined obliquely upward or downward with respect to the base end portion 33 a. Specifically, the first extension 33b of the first upper blade 33U is inclined so as to move upward as separating from the proximal end 33a. The first extension 33b of the first lower blade 33D is inclined to move downward as it is separated from the proximal end 33a. The second extension 33c is a direction away from the base end 33a from the extension end of the first extension 33b and in a direction parallel to the base 33a (a direction perpendicular to the first rotation axis 31). It extends to At the side edge of the second extending portion 33c, a cutting edge 33d for cutting grass is formed. The blade tip 33d and the tip end 33e (the tip end of the first cutting blade 33) of the second extension 33c protrude from the first support 32. In other words, the blade tip 33 d and the tip end 33 e do not overlap with the first support 32 in the vertical direction.

  The proximal end 33 a of the first cutting blade 33 is pivotally supported by the pivoting member 11 with respect to the first support 32. Thereby, as shown by arrows E and F and an imaginary line in FIG. 13, the first cutting blade 33 can swing around the longitudinal axis with the pivot member 11 as a fulcrum. As shown in FIGS. 10 to 12, the pivot support member 11 has a bolt 11a and a cap nut 11b. As shown in FIG. 11, the screw shaft of the bolt 11a is a hole formed in the base end 33a of the first cutting blade 33 (the first upper blade 33U and the first lower blade 33D), and the first support 32 The distal end hole 32b is penetrated upward from the lower side. The head of the bolt 11a is in contact with the lower surface of the first lower blade 33D. The cap nut 11b is screwed on the screw shaft of the bolt 11a. The cap nut 11b is in contact with the upper surface of the first upper blade 33U.

  As shown in FIG. 11, the mounting plate 12 is fixed to the lower portion of the boss 35. The mounting plate 12 is extended from the outer peripheral portion of the boss 35 to one side and the other side of the first rotary shaft 31 in the radial outer direction. The mounting plate 12 has mounting holes 12 a on one side and the other side of the first rotary shaft 31 in the radial outer direction. Each mounting hole 12a is a hole for mounting the first support 32 and the first anti-herbber 34.

The first grass wrap preventing body 34 is a member for preventing the grass from being wrapped around the first rotation shaft 31. The first herb-clinging prevention body 34 has a bottom plate 34 a and a tubular portion 34 b.
The bottom plate 34 a is a circular plate and is provided under the first anti-herp 34. As shown in FIG. 11, the bottom plate 34a has a first hole 34c and a second hole 34d. The first hole 34c is provided at the center of the bottom plate 34a. Two second holes 34d are provided concentrically apart from the center of the bottom plate 34a. The male screw formed in the lower end part of the 1st rotating shaft 31 is inserted in the 1st hole 34c, and nut N1 is screwed by the male screw concerned. The screw shaft of the bolt B3 is inserted into the second hole 34d. The screw shaft of the bolt B3 is inserted through the second hole 34d of the bottom plate 34a, the intermediate hole 32c of the first support 32, and the mounting hole 12a of the mounting plate 12. The tip of the screw shaft of the bolt B3 protrudes from the mounting hole 12a, and a nut N2 is screwed into the tip. As a result, the bottom plate 34 a of the first support 32 and the first windscreen 34 is fixed to the mounting plate 12. Here, since the mounting plate 12 is attached to the first rotation shaft 31 via the bosses 35, the mounting plate 12 rotates with the first rotation shaft 31. Therefore, the first support 32 and the first grass banding prevention body 34 fixed to the mounting plate 12 also rotate together with the first rotation shaft 31. Further, with the rotation of the first support 32, the first cutting blade 33 rotates around the first rotation shaft 31.

  The cylindrical portion 34 b is formed in a truncated cone shape. Specifically, the cylindrical portion 34b is formed in a truncated cone shape that decreases in diameter as it approaches the bottom plate 34a (as it moves downward). The cylindrical portion 34 b is disposed so as to surround the periphery of the first rotation shaft 31, and is located between the first rotation shaft 31 and the base end 33 a of the first cutting blade 33. Thereby, it is prevented that grass etc. wind around the 1st axis of rotation 31.

  As shown in FIG. 11, the extension (first extension 33b and second extension 33c) of the first upper blade 33U is positioned above the bottom plate 34a of the first grass-wrap guard 34. ing. Further, as shown in FIG. 12, at the height H1 at which the tip 33e of the upper blade 22U of the first cutting blade 33 is located, the swing center (axial center of the bolt 11a) C2 of the first cutting blade 33 and the first The distance L1 to the tip end 33e of the cutting blade 33 is longer than the distance L2 between the swing center C2 and the cylindrical portion 34b (L1> L2). Further, the minimum distance L3 between the rocking center C2 and the portion where the blade tip 33d of the first cutting blade 33 is formed is longer than the distance L2 between the rocking center C2 and the cylindrical portion 34b (L3> L2).

  When the first cutting blade 33 rotates around the first rotation shaft 31, a first position (see FIG. 13) extends in a radially outward direction (a direction away from the axial center) of the first rotation shaft 31 by centrifugal force. It is in the position shown by the solid line). The first cutting blade 33 cuts the grass while rotating around the first rotation shaft 31 at the first position. However, when the first cutting blade 33 hits a foreign object such as a stone, it pivots inward toward the first rotation shaft 31 with the pivot member 11 as a fulcrum. For example, as shown in FIG. 13, when the first cutting blade 33 rotates in the forward direction (arrow E direction) and hits the foreign matter S, it swings (recoils) in the reverse direction (arrow F direction). Thereby, it is prevented that an excessive load is added to the 1st cutting blade 33 or the 1st rotating shaft 31. FIG.

  Here, when the cylindrical portion 34 b surrounds the periphery of the first rotation shaft 31 and the first cutting blade 33 swings in the inward direction approaching the first rotation shaft 31, the first cutting blade 33 contacts Are placed in the Therefore, as indicated by an imaginary line in front of the arrow F in FIG. 13, when the first cutting blade 33 swings in the inward direction approaching the first rotation shaft 31, the first cutting blade 33 contacts the cylindrical portion 34b, The cutting blade 33 can be prevented from coming into contact with the first rotation shaft 31.

  In addition, when the first cutting blade 33 swings in the inward direction toward the first rotary shaft 31, the cylindrical portion 34b is an intermediate portion between the tip end 33e and the base end 33a of the first cutting blade 33. It is arranged at the position where the part contacts. Explaining in detail, as shown in FIG. 12, the distance L1 between the swinging center C2 of the first cutting blade 33 and the tip end 33e of the first cutting blade 33 is the distance L2 between the swinging center C2 and the cylindrical portion 34b. Longer than. Therefore, as shown in FIG. 13, when the first cutting blade 33 is swung inward toward the first rotation shaft 31, the middle portion 33f between the tip end 33e and the base end 33a is a cylinder. The end portion 33e is not in contact with the end portion 34b. A virtual circle indicated by reference numeral 34e in FIG. 13 indicates a portion at the same height as the first upper blade 33U in the cylindrical portion 34b (a position corresponding to the height H1 in FIG. 12). As described above, when the tip end portion 33e of the first cutting blade 33 does not contact the tubular portion 34b, the tubular portion 34b and the tip end portion 33e can be prevented from being damaged.

  Further, as shown in FIG. 12, the minimum distance L3 between the swinging center C2 of the first cutting blade 33 and the portion where the cutting edge 33d of the first cutting blade 33 is formed is the swinging center C2 and the cylindrical portion 34b. Longer than the distance L2. Therefore, when the first cutting blade 33 swings in the inward direction approaching the first rotary shaft 31, the blade tip 33d does not contact the cylindrical portion 34b. Thereby, the blade tip 33d of the first cutting blade 33 can hit the cylindrical portion 34b, and damage to the cylindrical portion 34b and the blade tip 33d can be prevented.

Next, the second mowing section 3B will be described.
About 2nd mowing part 3B, it demonstrates centering on a different point from 1st mowing part 3A, and description is abbreviate | omitted about the point which is common in 1st mowing part 3A.
As shown in FIG. 8, the second mowing section 3B has a second rotation shaft 36, a second support 37, a second cutting blade 38, and a second grass wrap preventing body 39. .

  The second rotation axis 36 is an axis that rotates around an axis (second longitudinal axis) extending in the vertical direction. As shown in FIG. 4, the second rotation shaft 36 is disposed rearward of the first rotation shaft 31 in the front-rear direction. As shown in FIG. 9, the rotation trajectory R2 of the tip of the second cutting blade 38 overlaps the rotation trajectory R1 of the tip 33e of the first cutting blade 33 in the machine width direction, and from the rotation trajectory R1 in the front-rear direction Even in the backward position.

  As shown by arrows H and I in FIG. 9, the first mowing section 3A and the second mowing section 3B rotate in opposite directions. More specifically, both the first mowing part 3A and the second mowing part 3B have cutting blades (first cutting blade 33 and second cutting blade 38) from the front to the rear on the inner side of the machine (near the center in the machine width direction). Rotate towards. As shown in FIG. 8, the first cutting blade 33 and the second cutting blade 38 are disposed at the same height. Therefore, the first cutting blade 33 and the second cutting blade 38 are out of phase by 90 degrees of rotation in order to avoid a collision on the side of the machine body where the rotational trajectories R1 and R2 overlap (FIG. 9). reference).

The other configuration of the second cutting blade 38 of the second mowing section 3B is the same as the configuration of the first cutting blade 33, and therefore the description thereof is omitted. Moreover, since the structure of the 2nd support body 37 of the 2nd mowing part 3B is the same as that of the 1st support body 32 of the 1st mowing part 3A, description is abbreviate | omitted.
The second grass wrap preventing body 39 is a member for preventing the grass from wrapping around the second rotation shaft 36. The configuration of the second grass wrap preventing body 39 is the same as the configuration of the first grass wrap preventing body 34, and therefore the description thereof is omitted.

Next, the front wheel 4F and the rear wheel 4R constituting the wheel 4 will be described.
First, the front wheel 4F will be described.
As shown to FIG. 4, FIG. 5, the front wheel 4F is comprised from a pair (two) front wheel. Specifically, the front wheel 4F is disposed in front of the first mowing portion 3A (in front of the first cutting blade 33) and in front of the second mowing portion 3B (in front of the second cutting blade 38). And the second front wheel 4F2 disposed in. The rotation shafts 41c and 43c of the pair of front wheels 4F are supported on the machine body 2 by separate support mechanisms 13 and 14, respectively.

The pair of front wheels 4F (first front wheel 4F1 and second front wheel 4F2) and the support mechanisms 13 and 14 for the front wheels 4F will be described below with reference to FIGS. 14 and 15.
First, the support mechanism 13 for the first front wheel 4F1 and the first front wheel 4F1 will be described.
The first front wheel 4F1 has a front wheel main body 41 and a projection 42. The front wheel body 41 and the projection 42 are integrally formed of a rigid material such as metal. The front wheel body 41 has a disc portion 41a and a circumferential plate portion 41b. A rotary shaft 41c is fixed to the center of the disc portion 41a, and the rotary shaft 41c protrudes from the center of the disc portion 41a to one side (right side) and the other side (left side) in the machine width direction. The peripheral plate portion 41b extends cylindrically from the outer periphery of the disk portion 41a toward the other side (left side) in the machine body width direction. The peripheral plate portion 41b is a portion that mainly contacts the ground when the first front wheel 4F1 rotates. The projecting portion 42 projects from the end on the other side in the machine body width direction of the peripheral plate portion 41 b in the radially outward direction of the front wheel main body 41 (the direction away from the rotation shaft 41 c). A plurality of projecting portions 42 are provided at intervals along the circumferential direction of the front wheel main body 41. The projecting portion 42 exerts a non-slip function by biting into the ground when the first front wheel 4F1 rotates.

The support mechanism 13 of the first front wheel 4F1 has a first front wheel support member 15, a first front wheel support arm 16, and a first lever 17.
The first front wheel support member 15 is fixed to the first housing main body 71. Specifically, as shown in FIGS. 5 and 6, the first front wheel support member 15 is fixed to the lower surface of the first upper plate portion 71a of the first housing main body 71 by a bolt B4 and a nut N3. The first front wheel support member 15 extends in the front-rear direction while being fixed to the first housing main body 71. A first front wheel support arm 16 is attached to the front of the first front wheel support member 15.

The first front wheel support arm 16 has a first right arm 16a, a first left arm 16b, and a first connection portion 16c. The first right arm 16a is provided on the right of the first front wheel 4F1. The first left arm 16b is provided to the left of the first front wheel 4F1. The first connection portion 16c connects the rear end of the first right arm 16a and the rear end of the first left arm 16b.
The rear end side of the first front wheel support arm 16 is pivotally supported by the front of the first front wheel support member 15 via the first shaft 18. A rotary shaft 41 c is rotatably supported on the front end side of the first front wheel support arm 16. The lower portion of the first lever 17 is fixed to the rear end side of the first front wheel support arm 16. Thus, the first lever 17 and the first front wheel support arm 16 integrally swing with the first shaft 18 as a fulcrum.

  The first lever 17 extends upward and rearward from the rear end side of the first front wheel support arm 16. As shown in FIGS. 4 and 6, the upper portion of the first lever 17 penetrates the first housing main body 71 and protrudes above the first housing main body 71. Specifically, in the first housing main body 71, a first elongated hole 71e (see FIG. 4) is formed from the first upper plate portion 71a to the first front plate portion 13c, and the upper portion of the first lever 17 is It projects above the first housing main body 71 through the first elongated hole 71e. A first guide member 25 is attached to an upper surface ranging from the first upper plate portion 71 a to the first front plate portion 13 c of the first housing main body 71. The first guide member 25 is provided with a locking portion capable of selecting and locking the first lever 17 to a plurality of positions in the front-rear direction.

  As shown in FIG. 14 and FIG. 15, the first front wheel support arm 16 has a first grass wrap preventing portion 23. The first grass wrapping prevention unit 23 is provided on the first left arm 16 b of the first front wheel support arm 16. The first grass wrapping prevention portion 23 is formed to be wider as it goes from the inner side to the outer side of the first front wheel 4F1 (as it goes from the front to the rear). Specifically, the first grass wrapping prevention unit 23 has an upper projecting portion 23 a that protrudes to the upper portion of the first front wheel support arm 16 and a lower projecting portion 23 b that protrudes to the lower portion of the first front wheel support arm 16. doing. The upper protruding portion 23a is formed in a triangular shape whose apex is located at the upper portion in a side view as viewed from the widthwise direction of the vehicle. The lower protruding portion 23b is formed in a triangular shape whose apex is located at the lower portion in a side view as viewed from the widthwise direction of the vehicle. The front end of the upper protrusion 23a is located forward of the front end of the lower protrusion 23b. The protrusion height of the upper protrusion 23a is higher than the protrusion height of the lower protrusion 23b. The first grass wrap preventing unit 23 prevents the grass from being wound around the first front wheel 4F1 by preventing the grass from entering the rear of the first front wheel 4F1.

The second front wheel 4F2 has the same configuration as the first front wheel 4F1. In other words, the pair of front wheels 4F (first front wheel 4F1 and second front wheel 4F2) included in the mowing machine 1 have the same configuration.
Specifically, the shape (including the outer diameter and the width) and the material of the pair of front wheels (the first front wheel 4F1 and the second front wheel 4F2) are common. The second front wheel 4F2 is a front wheel main body 41, a projecting portion 42, a disc portion 41a, a circumferential plate portion 41b, and a rotating shaft 41c of the first front wheel 4F1. It has a portion 43a, a peripheral plate portion 43b, and a rotating shaft 43c. The projecting portion 44 of the second front wheel 4F2 is provided on the other side in the vehicle body width direction, similarly to the projecting portion 42 of the first front wheel 4F1. That is, the projection 42 of the first front wheel 4F1 and the projection 44 of the second front wheel 4F2 are provided on the same side (left side) in the vehicle body width direction.

Further, the pair of front wheels (the first front wheel 4F1 and the second front wheel 4F2) share the support mechanisms 13 and 14 that support the rotation shaft of the front wheel with respect to the machine body 2. That is, the support mechanism 14 of the second front wheel 4F2 has the same configuration as the support mechanism 13 of the first front wheel 4F1.
As shown in FIGS. 14 and 15, the support mechanism 14 for the second front wheel 4F2 has a second front wheel support member 19, a second front wheel support arm 20, and a second lever 21.

  The second front wheel support member 19 is fixed to the second housing main body 73. Specifically, as shown in FIGS. 5 and 6, the second front wheel support member 19 is fixed to the lower surface of the second upper plate portion 73a of the second housing main body 72 by a bolt B5 and a nut N4. The second front wheel support member 19 extends in the front-rear direction while being fixed to the second housing main body 73. A second front wheel support arm 20 is attached to the front of the second front wheel support member 19.

The second front wheel support arm 20 has a second right arm 20a, a second left arm 20b, and a second connection portion 20c. The second right arm 20a is provided on the right of the second front wheel 4F2. The second left arm 20b is provided on the left of the second front wheel 4F2. The second connection portion 20c connects the rear end of the second right arm 20a and the rear end of the second left arm 20b.
The rear end side of the second front wheel support arm 20 is pivotally supported by the front of the second front wheel support member 19 via the second shaft 22. At the front end side of the second front wheel support arm 20, a rotary shaft 43c is rotatably supported. The lower portion of the second lever 21 is fixed to the rear end side of the second front wheel support arm 20. As a result, the second lever 21 and the second front wheel support arm 20 integrally swing with the second shaft 22 as a fulcrum.

  The second lever 21 extends upward and rearward from the rear end side of the second front wheel support arm 20. As shown in FIGS. 4 and 6, the upper portion of the second lever 21 penetrates the second housing main body 73 and protrudes above the second housing main body 73. Specifically, in the second housing main body 72, a second elongated hole 71f (see FIG. 4) is formed from the second upper plate portion 73a to the second front plate portion 73c, and the upper portion of the second lever 21 is It projects above the second housing body 73 through the second elongated hole 71 f. A second guide member 26 is attached to an upper surface ranging from the second upper plate portion 73 a to the first front plate portion 73 c of the second housing main body 72. The second guide member 26 is provided with a locking portion capable of selecting and locking the second lever 21 to a plurality of positions in the front-rear direction.

  In addition, the second front wheel support arm 20 has a second grass covering anti-slip portion 24 which becomes wider as it goes from the inner side to the outer side of the diameter of the second front wheel 4F2. The second grass wrapping prevention unit 24 is provided on the second left arm 20 b of the second front wheel support arm 20. That is, the second grass wrap preventing unit 24 is provided on the other side (left side) in the machine body width direction as the first grass wrap preventing unit 23 is. The configuration of the second grass wrap prevention unit 24 is the same as that of the first grass wrap prevention unit 23. That is, the second grass wrap preventing unit 24 has the upper protrusion 23 a and the lower protrusion 23 b of the first grass wrap preventing portion 23, and the upper protrusion 24 a and the lower protrusion 24 b having the same configuration. ing. The second grass wrap preventing unit 24 prevents the grass from being wound around the second front wheel 4F2 by preventing the grass from entering the rear of the second front wheel 4F2.

  According to the support mechanisms 13 and 14 described above, the height of the first front wheel 4F1 and the height of the second front wheel 4F2 can be changed. Specifically, the height of the first front wheel 4F1 can be changed by operating the first lever 17. By operating the second lever 21, the height of the second front wheel 4F2 can be changed. That is, the height of the first front wheel 4F1 and the height of the second front wheel 4F2 can be changed independently. Hereinafter, the operation of changing the height of the second front wheel 4F2 will be described first with reference to FIG.

  As shown in FIG. 7, the height of the second front wheel 4F2 can be changed by swinging the second lever 21 in the front-rear direction with the second shaft 22 as a fulcrum. Specifically, when the second lever 21 is in the forward position indicated by reference numeral 21A, the second front wheel 4F2 is in the lower position indicated by reference numeral 4F2A. When the second lever 21 is swung rearward from the front position to an intermediate position indicated by reference numeral 21B, the second front wheel 4F2 is lifted from the lower position to be an intermediate position indicated by reference numeral 4F2B. Furthermore, when the second lever 21 is swung rearward from the intermediate position to the rear position indicated by reference numeral 21C, the second front wheel 4F2 is lifted from the intermediate position to be in the upper position indicated by reference numeral 4F2C.

As shown in FIG. 7, the height from the ground G to the second cutting blade 38 can be changed by changing the height of the second front wheel 4F2. When the height from the ground G to the second cutting blade 38 becomes a desired height, the second lever 21 is locked to the locking portion of the second guide member 26. Thereby, the height from the ground G to the second cutting blade 38 can be maintained at a desired height.
Next, the operation of changing the height of the first front wheel 4F1 will be described. The operation of changing the height of the first front wheel 4F1 is the same as the operation of changing the height of the first front wheel 4F2 except that the first lever 17 is operated instead of the second lever 21.

  Although not shown, by pivoting the first lever 17 in the front-rear direction, the first front wheel support arm 16 pivots relative to the first front wheel support member 15 with the first shaft 18 as a fulcrum. Thereby, the first front wheel 4F1 moves up and down (the height is changed). By changing the height of the first front wheel 4F1, the height from the ground G to the first cutting blade 33 can be changed. When the first lever 17 is engaged with the locking portion of the first guide member 25 when the height from the ground G to the first cutting blade 33 becomes a desired height, from the ground G to the first cutting blade 33 Can be maintained at a desired height.

  As shown in FIGS. 4 and 6, the first front wheel 4F1 is disposed across the front and rear of the front end portion (the front end portion of the first front cover 72) of the first housing 7A. Specifically, the first front wheel 4F1 is disposed across the front and the rear of the first cut portion 72a formed in the first front cover 72. The rotation shaft 41c of the first front wheel 4F1 is disposed in front of the first housing 7A (forward of the first front cover 72). Specifically, when at least the first front wheel 4F1 is in the forward position (the position indicated by reference numeral 21A in FIG. 7), the rotation shaft 41c is located in front of the first housing 7A (forward of the first front cover 72). It is arranged as.

  The second front wheel 4F2 is disposed across the front and the rear of the front end (the front end of the second front cover 74) of the second housing 7B. Specifically, the second front wheel 4F2 is disposed across the front and the rear of the second cut portion 74a formed in the second front cover 74. The rotation shaft 43c of the second front wheel 4F2 is disposed rearward of the rotation shaft 41c of the first front wheel 4F1 in the front-rear direction. The rotation shaft 43c of the second front wheel 4F2 is disposed in front of the second housing 7B (in front of the second front cover 74). Specifically, when at least the second front wheel 4F2 is in the forward position, the rotation shaft 43c is disposed in front of the second housing 7B (forward of the second front cover 74).

The pair of front wheels 4F (the first front wheel 4F1 and the second front wheel 4F2) is not a drive wheel, but a driven wheel that rotates as the mowing machine 1 travels realized by the rotation of the rear wheel 4R. That is, the power of the prime mover 10 is not transmitted to the front wheel 4F.
Next, the rear wheel 4R will be described.
The rear wheel 4R is a driving wheel (traveling wheel) driven by the power of the motor 10.

  As shown to FIG. 1, FIG. 2 etc., 4 R of rear wheels are arrange | positioned behind the 1st mowing part 3A (back of the 1st cutting blade 33). In addition, the rear wheel 4R is disposed at the rear of the first housing 7A. As shown in FIG. 4, the front portion of the rear wheel 4R overlaps the rear portion of the second housing 7B in the front-rear direction. In other words, the front end of the rear wheel 4R is located forward of the rear end of the second rear plate portion 73b.

  The size (outer diameter and width) of the rear wheel 4R is larger than the size (outer diameter and width) of the front wheel 4F. As shown in FIG. 4, the width direction center C3 of the rear wheel 4R is located on one side (right side) in the machine body width direction than the first rotation shaft 31 of the first mowing part 3A. Further, the width direction center C3 of the rear wheel 4R is located on one side (right side) in the vehicle body width direction than the width direction center C4 of the first front wheel 4F1. As shown in FIG. 2, the rear wheel 4 </ b> R is rotatably supported by a rear wheel support portion 57 provided on one support portion 51 (described later) of the steering handle 5.

Next, the steering handle 5 will be described.
As shown in FIG. 1 etc., the steering handle 5 is attached to the first housing 7A of the airframe 2 and extends behind the first housing 7A (rear of the first mowing part 3A).
As shown in FIGS. 1 to 6, the steering handle 5 has one support 51, the other support 52, a connection 53, a handle support 54, a first handle 55, and a second handle 56. .

  The first support portion 51 and the second support portion 52 are located at the front of the steering handle 5 and extend in the front-rear direction at intervals in the vehicle body width direction. As shown in FIGS. 5 and 8, the front portion of the one support portion 51 and the front portion of the other support portion 52 are disposed below the first upper plate portion 71a of the first housing 7A. Thus, the one support portion 51 supports one side (right side) of the first housing 7A in the machine body width direction from below. On the other hand, the support portion 52 supports the other side (left side) of the second housing 7B in the vehicle body width direction from below.

  As shown in FIGS. 5 and 8, two (a pair of) holding members 27 are fixed to the lower surface of the first upper plate portion 71 a of the first housing main body 71. The holding member 27 is composed of a member (a channel steel or the like) having a groove extending in the front-rear direction. The two holding members 27 are spaced apart in the widthwise direction of the vehicle, and both extend in the front-rear direction. On the other hand, the front portion of the support portion 51 is fitted in and fixed to the groove of one of the holding members 27. On the other hand, the front portion of the support portion 52 is fitted in and fixed to the groove of the other holding member 27.

  As shown in FIGS. 2, 5 and 6, the rear portion of the one support portion 51 extends from the right rear portion of the first housing 7A to the rear of the first housing 7A and then extends upward. As shown in FIGS. 2 and 3, a rear wheel support portion 57 for supporting the rear wheel 4 </ b> R is provided at the rear of the one support portion 51. The rear wheel support portion 57 protrudes downward from the rear of the one support portion 51, and rotatably supports the rotation shaft 45 of the rear wheel 4R. The rear wheel support portion 57 may be provided on the other support portion 52 instead of the one support portion 51. Further, the rear wheel support portion 57 may be provided on both the one support portion 51 and the other support portion 52.

As shown in FIGS. 4 to 6, the rear portion of the other support portion 52 extends rearward and upward through a long hole 71g provided in the left rear portion of the first upper plate portion 71a of the first housing main body 71. There is. The rear end portion of the support portion 51 and the rear end portion of the other support portion 52 are connected in a U-shape, and the connection portion is connected to the handle support portion 54.
The handle support portion 54 is disposed above the rear wheel 4R, and supports the first handle portion 55 and the second handle portion 56 so as to be capable of pivoting upward or downward. Specifically, the proximal end portion of the first handle portion 55 is swingably supported by the right portion of the handle support portion 54. The proximal end of the second handle portion 56 is pivotally supported by the left portion of the handle support portion 54. The first handle portion 55 and the second handle portion 56 are connected by a connecting portion 53.

  As shown in FIGS. 1 to 3, a first grip portion 55 a is provided at the tip of the first handle portion 55. A second grip 56 a is provided at the tip of the second handle 56. The first grip portion 55a is provided on one side (right side) in the machine body width direction, and is gripped by the operator with the right hand. The second grip portion 56a is provided on the other side (left side) in the machine body width direction, and is gripped by the operator with the left hand.

  As shown in FIGS. 1 and 3, the first handle portion 55 and the second handle portion 56 are formed asymmetrically with respect to the width direction center C3 of the rear wheel 4R. Specifically, in the machine body width direction, the distance L4 between the width direction center C3 of the rear wheel and the first grip portion 55a is larger than the distance L5 between the width direction center C3 of the rear wheel and the second grip portion 56a ( L4> L5). In other words, the center C5 between the first gripping portion 55a and the second gripping portion 56a in the machine width direction is shifted to one side (rightward) in the machine width direction than the width direction center C3 of the rear wheel ing. Further, a center C5 between the first grip portion 55a and the second grip portion 56a in the machine width direction is located on one side (right side) in the machine width direction than the first front wheel 4F1 and the second front wheel 4F2. .

Next, the drive mechanism 6 will be described.
As shown in FIG. 16, the drive mechanism 6 includes a motor 10 and a power transmission mechanism 60.
The prime mover 10 is a drive source for driving the mowing section 3 and the rear wheel 4R. In the present embodiment, the prime mover 10 is an engine, and more specifically a diesel engine.
As shown in FIG. 3, FIG. 6, etc., the motor 10 is mounted on the first housing 7A of the airframe 2. The motor 10 is disposed in front of the steering handle 5 and above the first mowing section 3A. As shown in FIG. 4, the prime mover 10 is disposed at a position overlapping the one support portion 51 but not overlapping the other support portion 52 in the machine body width direction. Specifically, the prime mover 10 is disposed on one side (right side) in the machine body width direction than the other support portion 52. As shown in FIG. 2 and FIG. 3, the prime mover 10 is supported by the upper portion of a first transmission case (mission case) 101 that houses a transmission 84 described later.

  As shown in FIG. 8, the motor 10 has an output shaft 10 a extending downward. As shown in FIGS. 4 and 8, the output shaft 10 a is disposed above the one support portion 51 and at a position overlapping the one support portion 51 in the machine body width direction. Further, the output shaft 10a is disposed at a position not overlapping with the rear wheel 4R in the machine body width direction. Specifically, the output shaft 10a is disposed on one side (right side) of the rear wheel 4R in the vehicle body width direction. Further, as shown in FIG. 4, the output shaft 10 a is formed by the central axis of the first front wheel 4 F 1 (axial center of the rotary shaft 41 c) and the central axis of the rear wheel 4 R (axial center of the rotary shaft 45) in the front-rear direction. It is disposed behind the middle position C6. Further, the output shaft 10a is disposed in the front-rear direction in a direction relative to the first rotation shaft 31 of the first mowing part 3A and the second rotation shaft 36 of the second mowing part 3B.

The rotational power output from the output shaft 10 a of the motor 10 is transmitted by the power transmission mechanism 60 to the rear wheel 4 R, the first mowing section 3 A, and the second mowing section 3 B.
As shown in FIG. 16, the power transmission mechanism 60 includes a rear wheel power transmission mechanism 61, a first power transmission mechanism 62, and a second power transmission mechanism 63. The rear wheel power transmission mechanism 61 is a mechanism for transmitting the power of the prime mover 10 to the rear wheel 4R. The first power transmission mechanism 62 is a mechanism for transmitting the power of the prime mover 10 to the first mowing section 3A. The second power transmission mechanism 63 is a mechanism that transmits the power of the prime mover 10 to the second mowing section 3B.

  As shown in FIGS. 8, 11, 16 and 17, the rear wheel power transmission mechanism 61 includes a centrifugal clutch 80, a first shaft 81, a second shaft 82, a counter shaft 83, a transmission 84, and a transmission chain 85. Have. The centrifugal clutch 80 has an input side connected to the output shaft 10a. The output member 80 a of the centrifugal clutch 80 is connected to the upper end portion of the first shaft 81. The first shaft 81 and the output shaft 10 a of the motor 10 are connected or disconnected by the centrifugal clutch 80. Specifically, centrifugal clutch 80 is in the disengaged state when prime mover 10 is in the idling state, and does not transmit the rotational power output from output shaft 10 a to first shaft 81. On the other hand, when the number of revolutions of the prime mover 10 is higher than the number of revolutions in the idling state, the rotational force output from the output shaft 10a is transmitted to the first shaft 81 in the connected state.

  A first gear 86 rotating about the axis of the first shaft 81 and a second gear 87 rotating about the axis of the second shaft 82 are engaged with each other. Therefore, the rotational power transmitted to the first shaft 81 is transmitted to the second shaft 82 via the first gear 86 and the second gear 87. The rotational power transmitted to the second shaft 82 is transmitted to the counter shaft 83 via the first transmission gear 88. The first transmission gear 88 is disposed coaxially with the counter shaft 83 and rotates integrally with the counter shaft 83.

  The rotational power transmitted to the counter shaft 83 is transmitted to the input shaft 84 a of the transmission 84 via the gear mechanism 90. As shown in FIG. 8, FIG. 11, and FIG. 17, the counter shaft 83 and the transmission 84 are accommodated in the first transmission case 101. The first transmission case 101 rotatably supports the first rotation shaft 31 of the first mowing part 3A about a longitudinal axis (about an axial center in the vertical direction) via a bearing.

The gear mechanism 90 has a worm gear 91 and a wheel gear 92. The worm gear 91 rotates integrally with the counter shaft 83. The wheel gear 92 meshes with the worm gear 91 and rotates integrally with the input shaft 84a. The first transmission gear 93 and the first sprocket 94 are attached to the input shaft 84a.
The transmission 84 shifts the rotational power output from the prime mover 10. Specifically, the transmission 84 shifts the rotational power of the input shaft 84a and outputs it from the output shaft 84b. As shown in FIG. 11, FIG. 17 and FIG. 18, the transmission 84 has a shift gear 95, a second transmission gear 96, a second sprocket 97, and a shift fork 98. The transmission 84 is controlled to shift to a high speed state (forward state) and a low speed state (reverse state) by selectively engaging the shift gear 95 with the second transmission gear 96 and the second sprocket 97.

  The rotational power from the first transmission gear 93 can be transmitted to the second transmission gear 96. The rotational power from the first sprocket 94 can be transmitted to the second sprocket 97 via the chain 99. Therefore, when the shift gear 95 is engaged with the second transmission gear 96, the rotational power from the first transmission gear 93 is transmitted to the output shaft 84b via the first transmission gear 93, and the output shaft 84b is opposite to the input shaft 84a. Rotate in the direction. When the shift gear 95 is engaged with the second sprocket 97, the rotational power from the first sprocket 94 is transmitted by the chain 99 to the output shaft 84b via the first sprocket 94, and the output shaft 84b is the same as the input shaft 84a. Rotate in the direction.

The gear number ratio (gear ratio) of the first transmission gear 93 and the second gear gear 96 is smaller than the gear ratio (gear ratio) of the first sprocket 94 and the second sprocket 97. Therefore, the rotational speed of the output shaft 84 b is faster when the shift gear 95 is engaged with the second transmission gear 96 than when the shift gear 95 is engaged with the second sprocket 97.
The operation of selectively engaging the shift gear 95 with the second transmission gear 96 and the second sprocket 97 is performed by moving the shift fork 98 by the operation of the transmission operation shaft 89 by the transmission lever 140 described later. The shift operation shaft 89 is connected to the shift lever 140 via a third operation cable 180 described later.

  As shown in FIG. 17, the output shaft 84b of the transmission 84 projects from the first transmission case 101, and a chain case 100 is provided on the front in the projecting direction (rightward of the first transmission case 101). There is. As shown in FIGS. 1 to 4, the chain case 100 is provided on the right side of the first transmission case 101. The rear portion of the chain case 100 is supported by the rear wheel support portion 57 on the right side of the rear wheel 4F. A transmission chain 85 is accommodated in the chain case 100. As shown in FIGS. 4, 16, and 17, the transmission chain 85 is wound around a drive sprocket 103 mounted on the output shaft 84b and a driven sprocket 104 mounted on the rotation shaft 45 of the rear wheel 4R. . Thereby, the rotational power output from the output shaft 84b is transmitted to the rotating shaft 45 of the rear wheel 4R, and the rear wheel 4R rotates. When the shift gear 95 is engaged with the second transmission gear 96, the rear wheel 4R rotates at a first speed in the direction in which the mower 1 advances, and when the shift gear 95 is engaged with the second sprocket 97, the mower 1 Rotates backward at a second speed lower than the first speed.

  The first power transmission mechanism 62 transmits the rotational power from the prime mover 10 to the first cutting blade 33. As shown in FIGS. 8, 16, and 17, the first power transmission mechanism 62 has a first transmission gear 88, a second transmission gear 78, and a cutting blade clutch 79. The first transmission gear 88 rotates integrally with the counter shaft 83. The second transmission gear 78 is disposed coaxially with the first rotation shaft 31 of the first mowing section 3A, and meshes with the first transmission gear 88. The cutting blade clutch 79 is switched to a state of connecting power transmission from the second transmission gear 78 to the first rotating shaft 31 (hereinafter referred to as “transmission state”) or a state of disconnection (hereinafter referred to as “disconnected state”). It is possible.

  The second power transmission mechanism 63 transmits the rotational power from the prime mover 10 to the second cutting blade 38. As shown in FIG. 8, FIG. 16, FIG. 17, etc., the second power transmission mechanism 63 includes the first bevel gear 105, the power output shaft 106, the second bevel gear 107, the universal joint 108, the transmission shaft 109, the third bevel gear 110, A fourth bevel gear 111 is provided. The first bevel gear 105 is mounted on the first rotation shaft 31 and rotates with the first rotation shaft 31. The power take-off shaft 106 extends in a direction (machine width direction) orthogonal to the first rotation shaft 31, and the second bevel gear 107 is mounted at one end side. The second bevel gear 107 meshes with the first bevel gear 105. The other end of the power take-off shaft 106 is connected to one end of a transmission shaft 109 via a universal joint 108.

  As shown in FIG. 8, the universal joint 108 extends in the widthwise direction of the vehicle so as to cross over the hinge 8 connecting the first housing 7A and the second housing 7B. The universal joint 108 has a cover having two bellows portions 108 a, and the cover is mounted over the other end of the power takeoff shaft 106 and one end of the transmission shaft 109. One of the two bellows portions 108a is disposed above the first housing 7A, and the other is disposed above the second housing 7B. When the second housing 7B is swung about the hinge axis C1 with respect to the first housing 7A, the universal joint 108 is bendable at the bellows portion 108a according to the swing.

  As shown in FIGS. 6 and 8, the upper side of the universal joint 108 is covered by a first cover 112 and a second cover 113. The first cover 112 is attached to the upper surface of the first housing body 71 and covers the upper side of the right portion of the universal joint 108. The second cover 113 is attached to the top surface of the second housing body 73 and covers the upper side of the left portion of the universal joint 108.

  As shown in FIGS. 8 and 16, the third bevel gear 110 is attached to the other end side of the transmission shaft 109. The fourth bevel gear 111 meshes with the third bevel gear 110. The fourth bevel gear 111 is attached to the upper end portion of the second rotation shaft 36 of the second mowing section 3B. As shown in FIG. 8, of the second power transmission mechanism 63, the transmission shaft 109, the third bevel gear 110, and the fourth bevel gear 111 are accommodated in a second transmission case (transmission mechanism case) 102. The second transmission case 102 is disposed above the second housing 7B. The second transmission case 102 rotatably supports the second rotation shaft 36 of the second mowing part 3B around the vertical axis (about the vertical axis) via a bearing.

The rotational power from the prime mover 10 is transmitted from the first rotary shaft 31 to the power takeoff shaft 106 via the first bevel gear 105 and the second bevel gear 107, and then transmitted to the transmission shaft 109 via the universal joint 108. The rotational power transmitted to the transmission shaft 109 is transmitted to the second rotation shaft 36 via the third bevel gear 110 and the fourth bevel gear 111.
When the cutting blade clutch 79 is in the transmission state, the power from the motor 10 is transmitted to the first cutting blade 33 and the second cutting blade 38 via the first rotation shaft 31. Therefore, the first cutting blade 33 and the second cutting blade 38 rotate. When the cutting blade clutch 79 is in the disengaged state, the power from the motor 10 is not transmitted to the first rotating shaft 31, and therefore is not transmitted to the first cutting blade 33 and the second cutting blade 38. Therefore, the first cutting blade 33 and the second cutting blade 38 do not rotate. In the switching operation between the transmission state and the disconnection state of the cutting blade clutch 79, the second operation cable 170 is operated by the swinging of the cutting blade clutch lever 130 described later, and the cutting blade operation shaft 64 (see FIGS. 11 and 17) is This can be performed by rotating and moving the shifter 79a.

Next, the lever provided on the steering handle 5 will be described.
As shown in FIGS. 1 and 2, the steering handle 5 is provided with an accelerator lever 120, a cutting blade clutch lever 130, a speed change lever 140, and an adjustment lever 150.
First, the accelerator lever 120 and the cutting blade clutch lever 130 will be described based on FIGS. 1, 2 and 19 to 22.

First, the accelerator lever 120 will be described.
The accelerator lever 120 and the cutting blade clutch lever 130 are provided in the vicinity of the second grip portion 56 a of the second handle portion 56. The accelerator lever 120 can be switched between an idling position where the power of the prime mover 10 is not transmitted to the rear wheels (running wheels) 4R and a transmission position where the power is transmitted to the rear wheels 4R.

  As shown in FIGS. 19 and 20, the accelerator lever 120 has an accelerator lever main body 121, a first locking portion 122, and a first restricting portion 123. The accelerator lever body 121 is disposed below the second grip portion 56 a and extends in the front-rear direction. The accelerator lever body 121 is provided so as to be rotatable about the horizontal shaft 124. As shown in FIGS. 19 and 22, the horizontal axis 124 extends in the widthwise direction of the machine, and has a cylindrical portion 124a and a rotation axis 124b. The cylindrical portion 124a is fixed to the lower portion of the second handle portion 56 in front of the second grip portion 56a. The rotating shaft 124b is inserted into the cylindrical portion 124a, and is rotatable with respect to the cylindrical portion 124a. The front portion of the accelerator lever body 121 is rotatably supported by a lateral shaft 124. The accelerator lever main body 121 rotates upward about the horizontal axis 124 by the operator holding the second holding portion 56a (see arrow J in FIG. 20).

  The first locking portion 122 is extended from a midway portion (rearward position relative to the horizontal shaft 124) in the front-rear direction of the accelerator lever body 121 toward the inside (rightward) of the vehicle. The first locking portion 122 is rotatable around the horizontal axis 124 together with the accelerator lever body 121. One end of a spring 125 is locked to the first locking portion 122. The other end of the spring 125 is connected to one end of an operation cable 160 (hereinafter referred to as "first operation cable 160").

  The first operation cable 160 has an outer cylindrical member (outer) 161 and a wire (inner) 162. The wire 162 is accommodated movably with respect to the outer cylinder member 161, and one end portion protruding from the outer cylinder member 161 is connected to the other end portion of the spring 125. One end of the outer cylindrical member 161 is held by a bracket 135 described later. The other end of the wire 162 is connected to an accelerator (not shown) of the motor 10. The spring 125 biases the first locking portion 122 forward to bias the rear portion of the accelerator lever body 121 away from the second grip portion 56 a (in the direction in which the accelerator lever body 121 is opened).

  As shown in FIG. 20, the first restricting portion 123 is extended upward from the front portion of the accelerator lever body 121. As shown in FIG. 19, the first restricting portion 123 is located on the outer side (left side) of the second holding portion 56 a. The first restricting portion 123 is rotatable around the horizontal axis 124 together with the accelerator lever body 121. Specifically, when the accelerator lever body 121 is swung in the direction indicated by the arrow L in FIG. 19, the first restricting portion 123 is pivoted in the direction indicated by the arrow M.

  When the operator does not grip the accelerator lever body 121, the accelerator lever 120 is at the lower position (the position shown by the solid line in FIG. 20) in which the rear portion is separated from the second grip portion 56a. When the accelerator lever 120 is at the lower position (hereinafter referred to as "idling position"), the first operation cable 160 is at the position moved forward by the biasing force of the spring 125, and the motor 10 is in the idling state. In this idling state, the centrifugal clutch 80 is in the disengaged state, so the power of the prime mover 10 is not transmitted to the rear wheel 4R and the mowing section 3.

  When the operator grips the accelerator lever body 121 against the biasing force of the spring 125, the accelerator lever 120 is positioned at the upper position where the rear portion abuts on the lower surface of the second grip portion 56a (the position shown by the phantom line in FIG. 20). Become. When the accelerator lever 120 is at the upper position (hereinafter referred to as "transmission position"), the first operation cable 160 is at the position moved backward, and the number of rotations (rotational speed) of the prime mover 10 is higher than that in the idling state. When the number of revolutions of the prime mover 10 is higher than the number of revolutions of the idling state, the centrifugal clutch 80 is brought into the transmission state, and the power of the prime mover 10 is transmitted to the rear wheel 4R. Further, in this state (the transmission state of the centrifugal clutch 80), when the cutting blade clutch 79 is in the transmission state, the power of the prime mover 10 is also transmitted to the mowing part 3.

  As indicated by an arrow K in FIG. 20, the first restricting portion 123 rotates about the horizontal axis 124 in response to the switching operation from the idling position of the accelerator lever 120 to the transmission position. The first restricting portion 123 moves forward and upward (obliquely front upper) when the accelerator lever 120 is switched from the idling position to the transmission state. As described later, the first restricting portion 123 can block the switching of the cutting blade clutch lever 130 when the accelerator lever 120 is in the transmission position.

Next, the cutting blade clutch lever 130 will be described.
The cutting blade clutch lever 130 can be switched between a first position for transmitting the cutting blade clutch 79 and a second position for transmitting the cutting blade clutch 79. As shown in FIGS. 19 to 21, the cutting blade clutch lever 130 has a cutting blade clutch lever main body 131, a grip 132, a second locking portion 133, and a second regulating portion 134.

  The cutting blade clutch lever main body 131 is rotatably supported by a bracket 135 mounted on the second handle portion 56 in front of the second grip portion 56a. The bracket 135 has an upper plate portion 135a, a side plate portion 135b, a first front plate portion 135c, and a second front plate portion 135d. The upper plate portion 135a, the side plate portion 135b, the first front plate portion 135c, and the second front plate portion 135d are formed by bending a single plate.

  The upper plate portion 135a is disposed in front of and above the second grip portion 56a. In the upper plate portion 135a, one surface faces upward and the other surface faces downward. As shown in FIG. 19, the upper plate portion 135a has a substantially rectangular opening 135e. The side plate portion 135b is bent from the inboard side edge (left edge) of the upper plate portion 135a and extends downward. As shown in FIG. 20, the side plate portion 135b has an elongated hole 135f extending in the front-rear direction. The long hole 135f has a first hole portion 135f1 and a second hole portion 135f2 whose length in the front-rear direction is shorter than the first hole portion 135f1. The second hole 135f2 is located below the first hole 135f1 and is connected to the rear of the first hole 135f1.

  The first front plate portion 135 c is bent from the front edge of the upper plate portion 135 a and extends forward and downward along the upper surface of the second handle portion 56. As shown in FIG. 19, a prime mover switch 28 for switching on and off the prime mover 10 is attached to the upper surface of the first front plate portion 135c. The second front plate portion 135c is bent from the front edge of the first front plate portion 135c and extends downward. The second front plate portion 135 c has a first holding portion 136 and a second holding portion 137. The first holding portion 136 holds one end of the outer cylindrical member 161 of the first operation cable 160. The second holding portion 137 holds one end of an outer cylindrical member 171 of a second operation cable 170 described later.

  The cutting blade clutch lever main body 131 is pivotally supported relative to the upper plate portion 135 a of the bracket 135 so as to be rotatable about a longitudinal axis 138. As shown in FIGS. 19 and 20, the vertical axis 138 is provided in front of the horizontal axis 124, and extends in the vertical direction (orthogonal direction) intersecting the horizontal axis 124. As shown in FIG. 21 and the like, the cutting blade clutch lever main body 131 has a first portion 131a, a second portion 131b, and a third portion 131c. The first portion 131a, the second portion 131b, and the third portion 131c are formed by bending a single strip.

  One end (left end) of the first portion 131a is attached to the upper plate portion 135a of the bracket 135 by a bolt B6 and a nut N5. Thereby, the cutting blade clutch lever main body 131 is rotatable around the central axis (longitudinal axis 138) of the bolt B6. One end of the first portion 131 a is located at the upper left of the second handle portion 56, and the other end (right end) of the first portion 131 a is located at the upper right of the second handle portion 56. That is, the first portion 131 a is provided to cross over the second handle portion 56. The second portion 131b is bent from the other end of the first portion 131a and extends downward through the opening 135e of the upper plate portion 135a. The third portion 131c is bent from the lower end portion of the second portion 131b, and extends toward the inside of the vehicle (right) through the long hole 135f of the side plate portion 135b. A grip 132 serving as a handle at the time of operation is attached to the tip (right end) of the third portion 131c.

  The operator can grip the grip 132 and swing the third portion 131c in the front-rear direction (the direction of the arrow L in FIG. 19 and the opposite direction to that direction) along the long hole 135f. As a result, the cutting blade clutch lever body 131 pivots about the longitudinal axis 138. The rotation of the cutting blade clutch lever body 131 is performed above the second handle portion 56 and in front of the first restricting portion 123. By the rotation of the cutting blade clutch lever main body 131, it is possible to switch between the transmission state and the disconnection state of the cutting blade clutch 79. Specifically, when the cutting blade clutch lever body 131 is in the forward position shown by the phantom line in FIG. 19 (when the cutting blade clutch lever 130 is in the first position), the cutting blade clutch 79 is in the transmission state. On the other hand, when the cutting blade clutch lever main body 131 is in the rear position shown by the solid line in FIG. 19 (when the cutting blade clutch lever 130 is in the second position), the cutting blade clutch 79 is in the disengaged state.

As shown in FIGS. 19 and 21, the second locking portion 133 is provided at the third portion 131c. One end of a spring 139 is locked to the second locking portion 133. The other end of the spring 139 is connected to one end of an operation cable 170 (hereinafter, referred to as “second operation cable 170”).
The second operation cable 170 has an outer cylindrical member (outer) 171 and a wire (inner) 172. The wire 171 is accommodated movably with respect to the outer cylinder member 172, and one end portion protruding from the outer cylinder member 171 is connected to the other end portion of the spring 139. One end portion of the outer cylindrical member 171 is held by the second holding portion 137 of the bracket 135. The other end of the outer cylindrical member 171 is supported by a first support member 201 (see FIG. 6) described later on the machine body 2. As shown in FIG. 17, the other end of the wire 172 is connected to an operation member 65 provided at an end of the cutting blade operation shaft 64. The cutting blade operating shaft 64 is connected to the shifter 79 a of the cutting blade clutch 79 and rotates by applying a force to the operating member 65. Thereby, by moving the wire 172 by the operation of the cutting blade clutch lever 130, the cutting blade operation shaft 64 is rotated to move the shifter 79a, and the transmission state and the disconnection state of the cutting blade clutch 79 are switched. it can.

  The spring 139 urges the third portion 131c of the cutting blade clutch lever 130 to be pulled forward. By the biasing force of the spring 139, when the cutting blade clutch lever main body 131 is at the front position, the third portion 131c is positioned at the front of the first hole portion 135f1 (the front of the long hole 135f). When the cutting blade clutch lever main body 131 is in the rear position, the third portion 131c is located at the front of the second hole 135f2 (the rear of the long hole 135f). As shown in FIG. 20, a convex portion 135f3 protruding rearward is formed between the first hole portion 135f1 and the second hole portion 135f2. Therefore, in order to move the third portion 131c located in the second hole portion 135f2 to the first hole portion 135f1, the third portion 131c is temporarily moved backward against the biasing force of the spring 139 to thereby form the convex portion 135f3. Need to get over Therefore, the third portion 131c in the second hole 135f2 moves to the front of the first hole 135f1 (the front of the long hole 135f) under a situation not intended by the operator, and the cutting blade clutch lever body 131 Is moved to the forward position, and the cutting blade clutch 79 is prevented from being in the transmission state.

  As shown in FIG. 19, the second restricting portion 134 extends rearward from one end (left end) of the first portion 131 a of the cutting blade clutch lever 130. Thus, the cutting blade clutch lever 130 is substantially L-shaped in plan view. The second restriction portion 134 is integrally formed with the cutting blade clutch lever body 131. Therefore, with the rotation of the cutting blade clutch lever 130, the second restricting portion 134 rotates about the longitudinal axis 138. That is, the second restricting portion 134 moves while rotating about the vertical axis 138 in accordance with the switching operation of the cutting blade clutch lever 130 between the first position and the second position. In FIG. 19, the position of the second restricting portion 134 when the cutting blade clutch lever 130 is at the first position (forward position) is indicated by an imaginary line, and the cutting blade clutch lever 130 is at the second position (rear position) The position of the second restricting portion 134 is indicated by a solid line. The second restricting portion 134 crosses the upper side of the second handle portion 56 of the steering handle 5 when the cutting blade clutch lever 130 is switched from the second position to the first position. Direction).

The first restricting portion 123 of the accelerator lever 120 prevents switching of the cutting blade clutch lever 130 to the first position when the accelerator lever 120 is in the transmission position.
Specifically, when the accelerator lever 120 is in the transmission position, the first restricting portion 123 of the accelerator lever 120 protrudes upward from the second handle portion 56 of the steering handle 5 to move the movement path of the second restricting portion 134. Block. That is, when the accelerator lever 120 is in the transmission position, the first restricting portion 123 is in the position shown by the phantom line in FIG. 20 and blocks the moving path of the second restricting portion 134, so that the second restricting portion 134 is shown. Stop moving from the 19 solid line position to the virtual line position. Therefore, even if the cutting blade clutch lever 130 is to be switched from the second position to the first position, the movement of the second restricting portion 134 is blocked by the first restricting portion 123, and the switch can not be switched to the first position. As a result, when the operator grips the accelerator lever 120 to set the transmission position, the cutting blade clutch lever 130 is switched to the first position to cut the cutting blade even when the cutting blade clutch lever 130 is unintentionally touched. (The first cutting blade 33 and the second cutting blade 38) do not rotate and it is safe.

Next, the shift lever 140 and the adjustment lever 150 will be described based on FIGS. 1, 2 and 23 to 26.
As shown in FIGS. 1 and 2, the shift lever 140 and the adjustment lever 150 are provided near the first grip 55 a of the first handle 55.
First, the shift lever 140 will be described.

The shift lever 140 is a lever for switching the transmission 84. As shown in FIGS. 23 and 24, the shift lever 140 has a shift lever main body 141 and a third locking portion 142.
As shown in FIG. 2, the shift lever main body 141 is disposed in front of the first grip portion 55 a and extends upward and forward. The shift lever main body 141 is provided so as to be rotatable around the horizontal shaft 143. The horizontal axis 143 is disposed below the first handle portion 55 in front of the first grip portion 55a, and extends in the machine width direction. The lower portion of the shift lever main body 141 is supported rotatably around the horizontal shaft 143.

  The lower portion of the shift lever main body 141 is supported by the bracket 144 via the horizontal shaft 143. As shown in FIGS. 23 to 26, the bracket 144 includes an upper plate portion 144a, a front plate portion 144b, a lower plate portion 144c, a right plate portion 144d, and a left plate portion 144e. The upper plate portion 144a is attached to the upper portion of the first handle portion 55, and is positioned forward of the first grip portion 55a. The upper plate portion 144 a has a first slot 221 and a second slot 222. The first slot 221 and the second slot 222 are juxtaposed in the machine body width direction, and extend in the front-rear direction.

  The shift lever main body 141 is inserted into the first groove hole 221. The shift lever main body 141 extends in the vertical direction through the first slot 221, and the upper portion of the shift lever main body 141 is located above the first slot 221. As shown in FIG. 23, the first groove 221 is provided with a plurality of locking portions capable of locking the transmission lever main body 141. The locking portion includes a front locking portion 221a, a rear locking portion 221b, and an intermediate locking portion 221c. The front locking portion 221 a is provided at the front of the first slot 221. The rear locking portion 221 b is provided at the rear of the first slot 221. The intermediate locking portion 221c is provided at an intermediate position between the front locking portion 221a and the rear locking portion 221b.

The adjustment lever 150 is inserted into the second slot 222. As shown in FIG. 23, the second slot 222 is provided with a plurality of locking portions capable of locking an adjustment lever main body 151 described later. The locking portion includes locking portions 222 a, 222 b, 222 c, 222 d sequentially provided at intervals from the rear to the front of the second slot 222.
The front plate portion 144 b bends from the front edge of the upper plate portion 144 a and extends downward. The front plate portion 144 b has a third holding portion 145 and a fourth holding portion 146. The third holding portion 145 holds one end of an outer cylinder member 181 of a third operation cable 180 described later. The fourth holding portion 146 holds one end of an outer cylindrical member 191 of a fourth operation cable 190 described later. The lower plate portion 144c extends downward from the upper plate portion 144a, and is located forward of the first grip portion 55a. A lower portion of the speed change lever main body 141 to which the lateral shaft 143 is attached is rotatably attached to the lower plate portion 144 c via the lateral shaft 143. Thereby, as shown by the solid line and the imaginary line in FIG. 24, the shift lever main body 141 is rotatable around the horizontal axis 143.

As shown in FIG. 26 and the like, the right plate portion 144d curves downward from the right edge of the upper plate portion 144a and extends downward. The right plate portion 144 d is attached along the outer peripheral surface of the first handle portion 55. The left plate portion 144e is bent downward from the left edge of the upper plate portion 144a. The left plate portion 144e is connected to the left edge of the front plate portion 144b.
As shown in FIG. 24, the third locking portion 142 is provided at the lower portion of the shift lever main body 141. The third locking portion 142 is disposed above the horizontal shaft 143 and below the upper plate portion 144a. One end of a spring 148 is locked to the third locking portion 142. The other end of the spring 148 is connected to one end of an operation cable 180 (hereinafter, referred to as “third operation cable 180”). The third operation cable 180 has an outer cylindrical member (outer) 181 and a wire (inner) 182. The wire 181 is accommodated so as to be movable with respect to the outer cylinder member 182, and one end protruding from the outer cylinder member 182 is connected to the other end of the spring 148. One end portion of the outer cylindrical member 182 is held by the third holding portion 145 of the bracket 144. As shown in FIG. 17, the other end of the wire 182 is connected to the transmission operation shaft 89 of the transmission 84.

  When the shift lever 140 pivots about the horizontal axis 143, the wire 182 moves, the shift operating shaft 89 is operated, and the shift fork 98 moves. Thereby, the high speed state (forward movement state) in which the shift gear 95 meshes with the second transmission gear 96, the low speed state (backward movement) in mesh with the second sprocket 97, and the neutral state not meshing with the second transmission gear 96 and the second sprocket 97 Switch to (Stop state). Specifically, when the shift lever main body 141 is locked to the front locking portion 221 a of the first groove hole 221, the shift gear 95 is in a high speed state (forward state) in which the shift gear 95 meshes with the second shift gear 96. When the shift lever main body 141 is locked to the rear locking portion 221 b of the first groove hole 221, the shift gear 95 is in a low speed state (reversed state) in which the shift gear 95 meshes with the second sprocket 97. When the shift lever main body 141 is locked to the intermediate locking portion 221 c of the first groove hole 221, the shift gear 95 is in a neutral state (stop state) in which the shift gear 95 is not engaged with the second transmission gear 96 and the second sprocket 97.

Next, the adjustment lever 150 will be described.
The adjustment lever 150 is a lever for adjusting the angle of the second housing 7B with respect to the first housing 7A. As shown in FIGS. 23 and 25, the adjusting lever 150 has an adjusting lever main body 151 and a cable connection portion 152.
As shown in FIG. 2, the adjustment lever main body 151 is disposed in front of the first grip portion 55 a and extends in the vertical direction. As shown in FIG. 25, the adjusting lever main body 151 is provided so as to be rotatable around the horizontal axis 143. The adjustment lever main body 151 is disposed on the right side of the speed change lever main body 141, and the lower portion thereof is rotatably supported by the horizontal shaft 143.

  As shown in FIG. 25, the lower portion of the adjustment lever main body 151 is supported by the bracket 144 via the horizontal shaft 143. The adjusting lever body 151 extends vertically through the first slot 144e of the bracket 144, and the upper portion of the adjusting lever body 151 is located above the first slot 144e. The lower portion of the adjustment lever main body 151 is rotatably attached to the lower plate portion 144 c via the horizontal shaft 143. As a result, as represented by a solid line and an imaginary line in FIG. 25, the adjusting lever main body 151 is rotatable around the horizontal axis 143.

  By pivoting the adjustment lever 150 about the horizontal axis 143, the adjustment lever main body 151 can be moved in the front-rear direction along the first slot 144e. The adjustment lever main body 151 is selectively held at a plurality of positions in the front-rear direction by being selectively locked to the locking portions 222a, 222b, 222c, 222d. The adjustment lever main body 151 is biased by a spring 149 mounted on the lateral shaft 143 in a direction (rightward) in which the locking portions 222a, 222b, 222c, 222d are locked. The biasing force of the spring 149 keeps the adjusting lever body 151 locked to the locking portion. When the adjusting lever main body 151 is pivoted, the operator resists the biasing force of the spring 149 and moves the adjusting lever main body 151 leftward to separate it from the locking portion.

  As shown in FIG. 25, the cable connection portion 152 is provided at the lower portion of the adjustment lever main body 151. The cable connection portion 152 is located above the horizontal axis 143 and below the upper plate portion 144a. One end portion (proximal end portion) of an operation cable 190 (hereinafter, referred to as “fourth operation cable 190”) is connected to the cable connection portion 152 via the horizontal axis 153. That is, the proximal end portion of the fourth operation cable 190 is connected to the adjustment lever 150 as an operation portion provided on the steering handle 5.

  The fourth operation cable 190 has an outer cylindrical member (outer) 191 and a wire (inner) 192. One end of the outer cylindrical member 191 is held by the fourth holding portion 146. The wire 192 is accommodated movably with respect to the outer cylinder member 191, and one end (proximal end of the fourth operation cable 190) protruding from the outer cylinder member 191 is connected to the cable connection portion 152.

  The other end of the wire 192, which is the other end (tip end) of the fourth operation cable 190, is supported above the second housing 7B. Specifically, the other end of the wire 192 is connected to a swing link 193 (see FIG. 1, FIG. 6, etc.) described later. Thus, the fourth operation cable 190 can apply or release a tensile force that causes the second housing 7B to swing based on the operation of the adjustment lever 150 as the operation portion.

  As shown in FIGS. 1 and 6, the middle portion (the other end of the outer cylindrical member 191) of the fourth operation cable 190 is supported by the support member 200 above the first housing 7A. The support member 200 supports a first transmission case (mission case) 101 accommodating the transmission 84 and the like above the first housing 7A. As shown in FIGS. 6, 17 and 18, the support member 200 includes a first support member 201 and a second support member 202.

  The first support member 201 supports the lower portion of one side (right side) of the first transmission case 101 in the machine body width direction. The first support member 201 is fixed to the top of the first housing 7A. The first support member 201 has a first base portion 201 a and a first rising portion 201 b. The first base portion 201 a is attached to the upper surface of the first upper plate portion 71 a of the first housing main body 71 by a bolt B 7 and a nut N 6 (see FIG. 17). The first standing portion 201 b is standing upward from the first base portion 201 a. As shown in FIG. 17, the first upright portion 201b is attached to the lower portion of the right surface of the first transmission case 101 by a bolt B8. Thus, the lower right portion of the first transmission case 101 is supported by the first support member 201. As shown in FIG. 6, a cable support portion 201c is provided on the front portion of the first support member 201 (the front portion of the first upright portion 201b). The cable support portion 201 c supports the other end of the outer cylindrical member 171 of the second operation cable 170. As shown in FIG. 17, at the rear of the first upright portion 201b, an attachment portion 201d is provided to which the front portion of the chain case 100 is attached by a bolt or the like (not shown).

  As shown in FIG. 6, the second support member 202 is disposed on one side (right side) of the first support member 201 in the vehicle body width direction. As shown in FIGS. 6 and 17, the second support member 202 supports the lower portion of the other side (left side) of the first transmission case 101 in the vehicle body width direction. The second support member 202 is disposed on one side (right side) of the first support member 201 in the vehicle body width direction. The second support member 202 has a second base 202 a and a second upright portion 202 b. The second base portion 202a is attached to the upper surface of the second upper plate portion 73a of the second housing main body 73 by a bolt B9 and a nut N7 (see FIG. 17). The second standing portion 202b is standing upward from the second base 202a. As shown in FIG. 17, the second upright portion 202 b is attached to the lower portion of the left surface of the second transmission case 102 by a bolt B <b> 10. Thus, the lower left portion of the second transmission case 102 is supported by the second support member 202.

  As shown in FIGS. 6 to 8, the second support member 202 has a cable support portion 202 c that supports the middle portion (the other end of the outer cylinder member 191) of the fourth operation cable 190. That is, the second support member 202 doubles as a member that supports the first transmission case (transmission case) 101 and a member that supports the middle portion of the fourth operation cable 190. As shown in FIGS. 6, 7, and 18, the cable support portion 202c is provided at the rear of the second upright portion 202b. The cable support portion 202c is extended upward from the rear of the second upright portion 202b, and has a notch 202d capable of supporting the middle portion (the other end of the outer cylindrical member 191) of the fourth operation cable 190. ing. The notch 202d is notched from the front toward the rear at the upper portion of the second upright portion 202b. The other end of the outer cylindrical member 191 is fitted in and supported by the notch 202d.

  As shown in FIGS. 1, 8 and 27, the other end (tip end) of the wire 192, which is the tip end of the fourth operation cable 190, protrudes from the other end of the outer cylindrical member 191 to swing link 193 Is connected to one end of the The other end of the swing link 193 is swingably supported by the second transmission case (transfer mechanism case) 102 via a pivot shaft 194. As shown in FIGS. 1 and 8, the wire 192 protruding from the other end of the outer cylindrical member 191 is located above the hinge axis C1 and overlaps the hinge axis C1 in the machine width direction. There is.

Hereinafter, the swing operation of the second housing 7B by the adjustment lever 150 will be described.
When the adjustment lever main body 151 is swung rearward and locked to the locking portion 222a located at the rear of the second slot 222, the wire 192 of the fourth operation cable 190 is most pulled to the steering handle 5 side In this state, the amount of projection of the wire 192 projecting from the other end of the outer cylindrical member 191 is minimized. As shown by the solid line in FIG. 27, in this state, the cable support portion 202c, the pivot shaft 194 and the tip of the wire 192 are disposed on the same straight line SL, and the second housing 7B is relative to the first housing 7A. It is held at the first position not inclined. When the adjustment lever main body 151 is locked to the locking portion 222d located on the foremost side of the second groove hole 222, the wire 192 of the fourth operation cable 190 is most pulled to the swing link 193 side, and the outer cylinder The amount of protrusion of the wire 192 protruding from the other end of the member 191 is maximized. As shown by phantom lines in FIG. 27, in this state, the second housing 7B is held at the second position which is most inclined with respect to the first housing 7A.

  Although not shown, when the adjustment lever main body 151 is locked to the locking portion 222b of the second groove hole 222, the second housing 7B has a larger inclination angle than the second position with respect to the first housing 7A. And it is hold | maintained at the 3rd position whose inclination angle is smaller than a 2nd position. When the adjustment lever main body 151 is locked to the locking portion 222c of the second groove hole 222, the second housing 7B has a larger inclination angle than the third position with respect to the first housing 7A and the inclination angle than the second position. Is held in the small fourth position.

In this manner, the adjusting lever 150 is pivoted about the horizontal axis 143 to selectively lock the adjusting lever main body 151 with respect to the locking portions 222a, 222b, 222c, 222d. The angle of the second housing 7B can be adjusted.
As shown in FIG. 8, in a state where the second housing 7B is held at the first position where it is not inclined with respect to the first housing 7A, the first cutting blade 33 and the second cutting blade 38 are arranged at the same height. Therefore, it is possible to mow a large area of plane. As shown in FIG. 28, in a state where the second housing 7B is held at a position (second position to fourth position) inclined with respect to the first housing 7A, the second cutting blade relative to the first cutting blade 33 The slope 38 allows the first cutting blade 33 to cut the grass of the flat portion and the second cutting blade 38 to cut the grass at the ridge or the bank having a flat portion and a slope portion. Further, the angle of the second housing 7B with respect to the first housing 7A can be adjusted in accordance with the inclination angle of the slope part with respect to the flat part.

Next, the grass discharging cover 210 attached to the housing 7 will be described based on FIGS. 3 to 5, 29, and 30.
The grass discharge cover 210 intermittently discharges the grass which has been cut off by the first cutting blade 33 and the second cutting blade 38 and accumulated inside the housing 7 to the outside of the housing 7 together with the notch 70 provided in the housing 7 Constitute a grass discharge mechanism.

The notch 70 provided in the housing 7 allows the grass cut by the first cutting blade 33 and the second cutting blade 38 to pass rearward toward the outside of the housing 7. As shown in FIGS. 3, 5, and 30, the notch 70 includes a first notch 70 a and a second notch 70 b.
The first notch 70 a is provided in the first back plate 71 b of the first housing main body 71. The first notch 70a is formed by cutting out the corner of the lower left portion of the first rear plate 71b in a substantially rectangular shape. As shown in FIGS. 3 and 5, in the first back plate 71b, a third cutout 70c is provided on the right of the first cutout 70a. The third cutaway portion 70c is formed by cutting the lower portion of the first rear plate portion 71b in front of the rear wheel 4R. The notch height (upper edge of the third notch 70c) of the third notch 70c is lower than the notch height (upper edge of the first notch 70a) of the first notch 70a. The left portion of the third cutout 70c is connected to the right portion of the first cutout 70a. The first rear plate portion 71b has a non-cutaway portion 71h which is not cut out in the right portion (a portion on the right side of the third cutaway portion 70c). As shown in FIG. 3, an elastic plate 77 made of rubber or the like is attached to the non-cutaway portion 71h by a bolt B11 or the like. As shown in FIG. 2, the elastic plate 77 extends downward from the non-cutaway portion 71 h.

  As shown in FIGS. 3 and 30, the second notch 70 b is provided in the second rear plate portion 73 b of the second housing main body 73. The second cutaway portion 70b is formed by cutting out the corner of the lower right portion of the second rear plate portion 73b in a substantially rectangular shape. As shown in FIG. 30, the second notch 70b is located rearward of the first notch 70a. As shown in FIG. 3, the notch height of the second notch 70 b (upper edge of the second notch 70 b) is the notch height of the first notch 70 a (upper edge of the first notch 70 a) It is almost the same.

  The first notch 70 a is formed at the left end of the first housing main body 71, and the second notch 70 b is formed at the right end of the second housing main body 73. Thus, the first notch 70a and the second notch 70b are continuous with the hinge 8 interposed therebetween in the machine width direction. The second notch 70b is provided on the side (left) of the rear wheel 4R and does not overlap with the rear wheel 4R in the vehicle body width direction.

As shown in FIG. 3, FIG. 29, FIG. 30, etc., the grass discharging cover 210 has a first member 211 and a second member 212.
The first member 211 is attached to the first housing 7A. The first member 211 is formed of a rigid material such as metal. The first member 211 has a mounting plate portion 211a and a cover plate portion 211b. As shown in FIG. 29, the cover plate portion 211b is inclined with respect to the mounting plate portion 211a. The mounting plate portion 211 a and the cover plate portion 211 b are configured by bending a plate made of a rigid material such as metal. As shown in FIG. 30, the attachment plate portion 211a is attached to the upper surface of the first upper plate portion 71a of the first housing main body 71 by a bolt B12 and a nut N8. The specific attachment position of the attachment plate portion 211a is between the long hole 71g and the hinge 8 provided in the first upper plate portion 71a. The right front portion of the mounting plate portion 211a is notched in a rectangular shape, and a long hole 71g is disposed in the notched portion. The mounting plate portion 211a is disposed above the first upper plate portion 71a, above the hinge 8, and above the second upper plate portion 73a in a state of being attached to the first upper plate portion 71a.

  As shown in FIG. 29, the cover plate portion 211b is bent from the rear of the mounting plate portion 211a and extends downward and rearward (obliquely downward and rearward), and is disposed rearward of the second rear plate portion 73b. Thereby, the cover plate part 211b is arrange | positioned behind the 1st notch 70a and the 2nd notch 70b. As shown in FIGS. 3 and 30, the right edge of the cover plate portion 211b is disposed to the right of the right edge of the first notch 70a, and the left edge of the cover plate portion 211b is the left edge of the second notch 70b. It is located more to the left. The height of the lower edge of the cover plate portion 211b (the height of the lower edge of the first member 211) is set to be the same as the height of the upper edge of the third cutout 70c.

  As shown in FIGS. 29 and 30, the second member 212 is attached to the first member 211 by the attachment member 215. The second member 212 has an elastic plate 213 and a rigid plate 214. The elastic plate 213 is formed of an elastic material such as rubber or soft resin, and has flexibility. The elastic plate 213 has a rectangular shape, and the length in the machine body width direction of the elastic plate 213 is set to be equal to or greater than the length in the machine body width direction of the cover plate portion 211b. The upper portion of the elastic plate 213 is in contact with the rear surface of the cover plate portion 211b, and the lower portion of the elastic plate 213 extends below the lower edge of the cover plate portion 211b. The rigid plate 214 is formed of a rigid material such as metal. The rigid plate 214 abuts on the rear surface of the upper portion of the elastic plate 213, and the lower edge of the rigid plate 214 is positioned at substantially the same height as the lower edge of the cover plate portion 211b.

The rigid plate 214 and the elastic plate 213 are attached to the cover plate portion 211 b by a bolt B 13 and a nut N 9 which constitute the attachment member 215. The bolt B13 and the nut N9 fasten the rigid plate 214, the elastic plate 213, and the cover plate portion 211b together. Thus, the upper portion of the elastic plate 213 is sandwiched between the rigid plate 214 and the cover plate portion 211b.
As shown in FIG. 3, FIG. 29, and FIG. 30, the elastic plate 213 has a movable portion 213a at the bottom. Specifically, the movable portion 213a that can swing with respect to the first member 211 is lower than an attachment portion 215 (a portion where the attachment member 215 is provided) of the elastic plate 213 with respect to the first member 211. The movable portion 213a can be pivoted forward or backward with respect to the first member 211 with the mounting portion 215 as a fulcrum. As shown in FIG. 29, in the second member 212, the attachment portion 215 to the first member 211 is disposed above the cutting blade (the first cutting blade 33, the second cutting blade 38). In other words, the height H2 of the mounting portion 215 is higher than the height H3 of the cutting blade (the first cutting blade 33, the second cutting blade 38). Further, the length L6 in the vertical direction of the elastic plate 213 (the length in the vertical direction when the elastic plate 213 is not bent) is set to be twice or more the length L7 in the vertical direction of the first member 211 There is.

  As shown in FIGS. 3, 29, and 30, the second member 212 (the elastic plate 213 and the rigid plate 214) covers the rear of the cutouts (the first cutout 70a and the second cutout 70b). As shown in FIG. 29, the second member 212 shifts rearward as it extends downward from the attachment portion 215, and is inclined so that the distance L8 in the front-rear direction with the second rear plate portion 73b gradually increases. There is. In other words, the inclination angle of the second member 212 with respect to the mounting plate portion 211a is larger than the inclination angle of the second rear plate portion 73b with respect to the second upper plate portion 73a.

As shown in FIG. 29, the lower end portion of the elastic plate 213 (the lower end portion of the grass discharge cover 210) is positioned below the lower end portion of the second rear plate portion 73b, and contacts or approaches the ground G. . Further, the lower end portion of the elastic plate 213 is located in front of the rotation shaft 45 of the rear wheel 4R.
Hereinafter, the operation of the grass discharging mechanism (the notch 70 and the grass discharging cover 210) will be described.
When the first cutting blade 33 and the second cutting blade 38 of the mowing part 3 are rotated to cut the grass, the cut grass moves backward inside the housing 7 (the first housing 7A and the second housing 7B) Do. Here, since the first rear plate portion 71b and the second rear plate portion 73b shift toward the rear as they move rearward, the grass moved backward in the housing 7 is the first rear plate portion 71b. And, it moves toward the inside of the vehicle along the inner surface of the second rear plate portion 73 b and reaches the notch 70, but is received by the grass discharge cover 210 covering the notch 70. Therefore, the mowing grass accumulates inside the housing 7 as the mowing continues.

  As the cut grass accumulates inside the housing 7, the elastic plate 213 of the grass discharge cover 210 receives a pressing force rearward from the accumulated grass. At a stage where the amount of accumulated grass is small, the pressing force that the movable portion 213a of the elastic plate 213 receives from the grass is small. Therefore, the movable part 213a of the elastic plate 213 does not swing, and the state in which the rear of the notch (the first notch 70a and the second notch 70b) is covered is maintained, and the accumulation of grass continues. When the amount of accumulated grass increases, the pressing force that the movable portion 213a receives from the grass increases, so the movable portion 213a swings rearward. Thereby, the back of a notch (the 1st notch 70a, the 2nd notch 70b) is opened, and grass is discharged to the exterior of housing 7 through the notch.

Thus, the accumulated grass is discharged to the outside of the housing 7 every time a fixed amount of cut grass is accumulated in the housing 7. Therefore, with the progress of the mower 1, a certain amount of grass lumps will be left behind at a fixed interval behind the mower 1, and it is possible to easily process (discard) the cut grass Become.
Hereinafter, the effect of the mowing machine 1 of the said embodiment is demonstrated.

  The mower 1 includes a motor 10, a traveling wheel (rear wheel) 4R driven by power of the motor 10, a cutting blade (first cutting blade 33, second cutting blade 38) rotated by power of the motor 10, and a motor A cutting blade clutch 79 for transmitting or blocking power from 10 to the cutting blades 33, 38; and a cutting blade clutch operable to switch between a first position for transmitting the cutting blade clutch 79 and a second position for cutting the cutting blade. The accelerator lever 120 is provided with a lever 130, and an accelerator lever 120 that can be switched to an idle position where the power of the prime mover 10 is not transmitted to the traveling wheel 4R and a transmission position for transmitting the traveling wheel 4R. A first restricting portion 123 is provided to prevent switching of the cutting blade clutch lever 130 to the first position when in the transmission position.

  According to this configuration, when the accelerator lever 120 is in the transmission position, the first restricting portion 123 prevents the cutting blade clutch lever 130 from being switched to the first position in which the cutting blade clutch 79 is in the transmission state. Therefore, even if the cutting blade clutch lever 130 is unintentionally brought into contact with the cutting blade clutch lever 130 when the operator places the accelerator lever 120 in the transmission position, the cutting blade clutch lever 130 is switched to the first position and the cutting blades 33, 38 It is safe without rotating.

In addition, the cutting blade clutch lever 130 has a second restricting portion 134 which moves in response to the switching operation between the first position and the second position, and the first restricting portion 123 has the accelerator lever 120 in the transmitting position. In addition, blocking the movement path of the second restricting portion 134 prevents switching of the cutting blade clutch lever 130 to the first position.
According to this configuration, when the accelerator lever 120 is at the transmission position, the first restricting portion 123 blocks the moving path of the second restricting portion 134, thereby inhibiting the movement of the second restricting portion 134. The clutch lever 130 can be reliably prevented from switching to the first position.

Further, the first restricting portion 123 rotates about the horizontal shaft 124 in response to the switching operation of the accelerator lever 120 from the idling position to the transmitting position, and the second restricting portion 134 is a second position of the cutting blade clutch lever 130. Along the switching operation from the first position to the first position, it pivots about a longitudinal axis 138 extending in a direction intersecting the horizontal axis 124.
According to this configuration, the first restricting portion 123 and the second restricting portion 134 can be brought into contact with each other at an intersecting angle, so that the first restricting portion 123 and the second restricting portion 134 can be reliably brought into contact with each other. 2) It becomes possible to prevent the movement of the restriction portion 134.

  In addition, the mowing machine 1 includes the machine body 2 on which the motor 10 is mounted, and the steering handle 5 attached to the machine body 2. The second restricting portion 134 is configured such that the cutting blade clutch lever 130 is at the first position from the second position. When switched to the position, the steering wheel moves in a direction crossing the upper side of the steering handle 5, and the first regulating portion 123 of the second regulating portion 134 above the steering handle 5 when the accelerator lever 120 is in the transmission position. Block the moving path.

According to this configuration, it is possible to prevent the movement of the second restricting portion 134 by bringing the first restricting portion 123 and the second restricting portion 134 into contact above the steering handle 5. Therefore, it can be visually confirmed that the first restricting portion 123 and the second restricting portion 134 operate normally (that the movement of the second restricting portion 134 is reliably prevented).
Further, the accelerator lever 120 has an accelerator lever main body 121 provided rotatably below the steering handle 5 about a horizontal axis, and the first restricting portion 123 is extended upward from the accelerator lever main body 121 There is.

According to this configuration, the first restricting portion 123 is moved to the restricting position (position in contact with the second restricting portion 134) by the operation of gripping the accelerator lever main body 121 together with the steering handle 5, and thus a special operation is required. Instead, the first restricting portion 123 can restrict the movement of the second restricting portion 134.
Further, the cutting blade clutch lever 130 has a cutting blade clutch lever main body 131 rotatably provided about the longitudinal axis 138 above the steering handle 5 and in front of the first restricting portion 123, and the second restricting portion Reference numeral 134 is extended rearward from the cutting blade clutch lever body 131.

According to this configuration, the second restricting portion 134 is moved by a simple operation of rotating the cutting blade clutch lever main body 131 about the longitudinal axis, and the first restricting portion 123 is moved when the accelerator lever 120 is in the transmission position. It can be in contact with
Further, the mowing machine 1 includes the machine body 2, a motor 10 mounted on the machine body 2 and having an output shaft 10a extending downward, a first mowing section 3A disposed on one side in the machine body width direction, and the machine body width direction. A second mowing part 3B disposed on the other side, a rear wheel 4R disposed behind the first mowing part 3A, a first front wheel 4F1 disposed in front of the first mowing part 3A, and a second mowing part A second front wheel 4F2 disposed in front of 3B and a steering handle 5 extended to the rear of the first mowing section 3A, and the prime mover 10 is in front of the steering handle 5 and the first mowing section The output shaft 10a is disposed above 3A, and the output shaft 10a is disposed closer to the vehicle width direction than the rear wheel 4R.

  According to this configuration, since the output shaft 10a of the prime mover 10 is disposed on one side in the vehicle body width direction than the rear wheel 4R, the weight of the motor 10 which is a heavy object is greater than the rear wheel 4R in the vehicle body width direction. It is biased to one side, and the balance with the weight of the second mowing section 3B etc. located on the other side in the machine width direction than the rear wheel 4R is improved. Therefore, the weight balance in the machine body width direction based on the rear wheel 4R is improved, and the operability of the mowing machine 1 is improved.

Further, the output shaft 10a is disposed rearward of an intermediate position between the central axis of the first front wheel 4F1 and the central axis of the rear wheel 4R in the front-rear direction.
According to this configuration, since the center of gravity of the prime mover 10 can be shifted in the direction approaching the rear wheel 4R, the operation of lifting the front portion of the vehicle body 2 with the rear wheel 4R as a fulcrum is easily performed It will be possible to do.

  Further, the first mowing part 3A has a first rotating shaft 31 which is rotated by power from the motor 10, and a first cutting blade 33 which is rotated together with the first rotating shaft 31, and the second mowing part 3B is The output shaft 10a has a first rotation shaft 31 and a second rotation shaft 36. The second rotation shaft 36 rotates with power from the motor 10 and the second cutting blade 38 rotates with the second rotation shaft 36. It is located more backward.

According to this configuration, the center of gravity of the prime mover 10, which is a heavy load, can be positioned behind the center of gravity of the mowing section (the first mowing section 3A and the second mowing section 3B). Thereby, the weight balance of the mowing machine 1 in the front-rear direction is improved, and the operability of the mowing machine 1 is improved.
Further, the airframe 2 has a first housing 7A covering the upper side of the first mowing part 3A and a second housing 7B covering the upper side of the second mowing part 3B, and the steering handle 5 is a first housing The output shaft 10a has one support portion 51 supporting one side of the body width direction of 7A from below and the other support portion 52 supporting the other side of the first housing 7A in the machine width direction from below. It is arrange | positioned in the position which overlaps with the one support part 51 in the body width direction.

According to this configuration, the first housing 7A can be supported from below by the one support portion 51 of the steering handle 5 in the vicinity of the center of gravity of the motor 10 which is a heavy load. Therefore, the first housing 7A and the prime mover 10 are stably supported by the steering handle 5, and the operability of the mowing machine 1 is improved.
In addition, the motor 10 is disposed closer to the one side in the machine body width direction than the other support portion 52.

According to this configuration, the center of gravity position of the prime mover 10 can be shifted to one side in the machine body width direction relative to the other support portion 52, so balance with the weight of the second mowing part 3B etc. on the other side in the machine body width direction. As a result, the operability of the mowing machine 1 is improved.
Further, the mowing machine 1 includes a body 2, a first mowing part 3A disposed on one side in the body width direction, and a hinge axis C1 disposed on the other side in the body width direction and extending in the front-rear direction. A second mowing portion 3B swingable with respect to the mowing portion 3A, a first front wheel 4F1 disposed in front of the first mowing portion 3A, and a second front wheel 4F2 disposed in front of the second mowing portion 3B And a pair of front wheels including a pair of front wheels has a common support mechanism 13, 14 supporting the rotation axis of the front wheels with respect to the outer diameter, the width, and the fuselage 2.

According to this configuration, since the outer diameter and the width of the pair of front wheels (first front wheel 4F1 and second front wheel 4F2) and the support mechanisms 13 and 14 are common, it is possible to reduce the types of parts of the mower 1 It is possible to realize the improvement of the manufacturing efficiency, the improvement of maintainability such as repair and replacement, and the reduction of the manufacturing cost.
The airframe 2 also has a first housing 7A covering at least the upper side of the first mowing part 3A, and a second housing 7B covering at least the upper side of the second mowing part 3B, and the first front wheel 4F1 The second front wheel 4F2 is disposed across the front and rear of the front end portion of the first housing 7A, and is disposed across the front and rear of the front end portion of the second housing 7B.

According to this configuration, the length in the front-rear direction of the first housing 7A and the second housing 7B can be shortened, and the machine body 2 is compact. Therefore, the mowing machine 1 can be reduced in weight to improve operability. can do.
The rotation shaft 41c of the first front wheel 4F1 is disposed forward of the first housing 7A, and the rotation shaft 43c of the second front wheel 4F2 is disposed forward of the second housing 7B.

Also by this configuration, the length in the front-rear direction of the first housing 7A and the second housing 7B can be shortened, and the machine body 2 is compact. Therefore, the mowing machine 1 is reduced in weight to realize improvement in operability. be able to.
Further, the first housing 7A has a first housing main body 71 covering the upper side of the first mowing part 3A, and a first front cover 72 extended downward from the front end portion of the first housing main body 71. The second housing 7B includes a second housing main body 73 covering the upper side of the second mowing part 3B, and a second front cover 74 extending downward from the front end of the second housing main body 73, The first front cover 72 has a first cut portion 72a cut upward from the lower end, and the second front cover 74 has a second cut portion 74a cut upward from the lower end. The first front wheel 4F1 is disposed across the front and the rear of the first cut portion 72a, and the second front wheel 4F2 is disposed across the front and the rear of the second cut portion 74a.

According to this configuration, the upper side and the side of the first front wheel 4F1 are covered by the first front cover 72, and the upper side and the side of the second front wheel 4F2 are covered by the second front cover 74. Therefore, foreign matter such as earth and sand can be prevented from invading the inside of the first housing 7A or the second housing 7B from the upper side or the side of the first front wheel 4F1 and the second front wheel 4F2.
Further, the first front cover 72 and the second front cover 74 are formed of a sheet made of an elastic material.

According to this configuration, since the first front cover 72 and the second front cover 74 elastically deform when a load is applied, the grass in the forward direction of travel is smoothed inside the first housing 7A and the second housing 7B. To the first mowing section 3A and the second mowing section 3B.
Further, the first front wheel 4F1 and the second front wheel 4F2 have non-slip protrusions 42, 44 projecting radially outward on the other side in the machine body width direction.

  According to this configuration, when the first front wheel 4F1 is caused to travel on the plane and the second front wheel 4F2 is caused to travel on the slope by the projections 42 and 44 provided on the other side in the machine width direction, 2 The front wheel 4F2 is prevented from sliding along the slope. Therefore, the mowing machine 1 can be prevented from sliding down the slope and it is safe. Further, since the first front wheel 4F1 and the second front wheel 4F2 have the projecting portions 42 and 44 on the same side, it is possible to make the first front wheel 4F1 and the second front wheel 4F2 a common component that can be substituted. .

  Further, the support mechanisms 13 and 14 are attached to the first housing 7A and support the first front wheel 4F1, and the second front wheel attached to the second housing 7B and support the second front wheel 4F2. The first front wheel support arm 16 has a support arm 20, and the first front wheel support arm 16 has a first grass covering preventing portion 23 which becomes wider as it goes from the inner side to the outer side of the first front wheel 4F1. 20 has a second grass covering portion 24 which becomes wider as it goes from the inner side to the outer side of the diameter of the second front wheel 4F2.

  According to this configuration, the first front wheel 4F1 is prevented by preventing the grass from invading the rear of the first front wheel 4F1 and the second front wheel 4F2, respectively. And the second front wheel 4F2 can be prevented from being wounded with grass. In addition, since the first front wheel support arm 16 has the first grass wrap preventing portion 23 and the second front wheel support arm 20 has the second grass wrap preventing portion 24, the grass front is prevented from rolling around the front wheel 4 F. It is not necessary to prepare the above-mentioned member as a separate member, and it is possible to realize the reduction of the number of assembling steps of the mowing machine 1 and the weight reduction.

  Further, the mowing machine 1 is attached to a rotating shaft (a first rotating shaft 31 and a second rotating shaft 36) rotating around a longitudinal axis, and the rotating shafts 31 and 36 and extends outward in the radial direction of the rotating shafts 31 and 36 A support (the first support 32 and the second support 37), the base end portions 33a and 38a pivotally supported pivotally about the longitudinal axis with respect to the supports 32 and 37, and the support Grass having a cutting blade (a first cutting blade 33, a second cutting blade 38) having tip portions 33e, 38e projecting from 32 and 37, and tubular portions 34b and 39b surrounding the rotary shafts 31, 36. The tubular portion 34b, 39b is provided between the rotary shafts 31, 36 and the proximal end portion 33a, 38a, and the tubular portion 34b, 39b is provided with a wrap prevention body (a first grass wrap prevention body 34, a second grass wrap prevention body 39). Cutting blade 33, 38 when the cutting blades 33, 38 are swung inward to approach the rotary shafts 31, 36. There has been placed in contact.

According to this configuration, when the cutting blade (the first cutting blade 33, the second cutting blade 38) swings in the inward direction approaching the rotating shaft (the first rotating shaft 31, the second rotating shaft 36), By contacting the shape portion 34b, it is possible to prevent the cutting blades 33, 38 from contacting the rotary shafts 31, 36.
In the cylindrical portion 34b, when the cutting blade 33, 38 swings inward, the intermediate portion between the tip end 33e, 38e of the cutting blade 33, 38 and the base end 33a, 38a contacts It is placed in position.

According to this configuration, when the tips 33e and 38e (corners of the tips and the like) of the cutting blades 33 and 38 hit the cylindrical portion 34b, the cylindrical portions 34b and 39b and the tips 33e and 38e are damaged. It can prevent.
In addition, the grass wrap preventing body 34, 39 has bottom plates 34a, 39a at the lower part of the cylindrical portions 34b, 39b, and the supports 32, 37 are attached to the bottom plates 34a, 39a.

According to this configuration, the supports 32, 37 can be attached to the lower part of the cylindrical portions 34b, 39b in a stable posture, and attachment of the cutting blades 33, 38 to the cylindrical portions 34b, 39b can be reliably and accurately It can be carried out.
Moreover, cylindrical part 34b, 34b is formed in a truncated cone shape which becomes small diameter as it approaches bottom plate 39a, 39a.

According to this configuration, the base end portions 33a and 38a of the cutting blades 33 and 38 can be disposed close to the rotating shafts 31 and 36 while avoiding contact with the cylindrical portions 34b and 34b.
In addition, a pivot support member 11 is provided for pivotally supporting the base ends 33a and 38a of the cutting blades 33 and 38 with respect to the supports 32 and 37. The pivot support member 11 is a base end 33a of the cutting blades 33 and 38, It has a bolt 11a having a screw shaft passing through 38a and supports 32 and 37, and a cap nut 11b screwed to the screw shaft of the bolt 11a.

According to this configuration, the proximal end portions 33a and 38a of the cutting blades 33 and 38 can be securely and firmly attached in a state of being pivotally supported with respect to the supports 32 and 37. In addition, since the cutting blades 33 and 38 can be easily attached to and detached from the supports 32 and 37 as compared with the case where a split pin or the like is used, the maintenance property is excellent.
Further, the mowing machine 1 is extended downward from the cutting blades 33, 38 rotating around the longitudinal axis, the upper plate portions 71a, 73a covering the upper portions of the cutting blades 33, 38, and the upper plate portions 71a, 73a. A housing 7 having rear plates 71b and 73b covering the rear of the cutting blades 33 and 38, a first member 211 attached to the housing 7, and a first member 211, while being attached to the first member 211 And a second member 212 including a movable portion 213a capable of swinging, and the rear plate portions 71b and 73b are notches for passing the grass cut by the cutting blades 33 and 38 backward. The second member 212 covers the rear of the notches 70a and 70b, and the attachment portion 215 for the first member 211 is disposed above the cutting blades 33 and 38.

  According to this configuration, when the grass cut by the cutting blades 33 and 38 accumulates inside the housing 7, the movable portion 213a of the second member 212 swings backward with the attachment portion 215 as a fulcrum, so the accumulated grass Can be intermittently discharged to the outside of the housing 7 by passing the notches 70a and 70b. In addition, since the attachment portion 215 of the second member 212 to the first member 211 is disposed above the cutting blades 33 and 38, the movable portion 213a of the second member 212 has appropriate flexibility (strain). You can As a result, the movable portion 213a can be swung backward at the timing when the grass is accumulated inside the housing 7. Therefore, the grass accumulated inside the housing 7 can be intermittently discharged to the outside of the housing 7 at an appropriate timing.

Further, the rear plate portions 71b and 73b are inclined to shift rearward as extending downward from the upper plate portions 71a and 73a, and the second member 212 shifts rearward as extending downward from the mounting portion 215. It inclines so that the distance of the front-back direction with plate parts 71b and 73b may become large gradually.
According to this configuration, it is possible to secure a long distance in the front-rear direction between the rear plate portions 71 b and 73 b of the housing 7 and the second member 212 of the grass discharge cover 210. Therefore, the amount of grass accumulated in the rear of the housing 7 can be increased without increasing the size of the housing 7. As a result, it is possible to smoothly discharge the grass accumulated inside the housing 7 to the outside of the housing 7 as a large block.

The grass discharge cover 210 is provided with a front wheel 4F provided in front of the cutting blades 33, 38 and a rear wheel 4R provided behind the cutting blades 33, 38. The lower end portion of the grass discharge cover 210 is a rotation of the rear wheel 4R. It is located forward of the axis 45.
According to this configuration, the grass lumps accumulated inside the housing 7 can be discharged forward of the rotation shaft 45 of the rear wheel 4R through the grass discharge cover 210. Therefore, it is possible to prevent the rotation of the rear wheel 4R from affecting the discharge of the grass lumps.

The second member 212 has an elastic plate 213 having a movable portion 213a at its lower portion, and a rigid plate 214 which holds the upper portion of the elastic plate 213 between itself and the first member 211. The length in the direction is set to be twice or more the length in the vertical direction of the first member 211.
According to this configuration, the grass is prevented from being caught by the first member 211 and the discharge to the outside of the housing 7 being prevented, and the grass accumulated inside the housing 7 is smoothly discharged to the outside of the housing 7 Can.

  In addition, the cutting blade includes a first cutting blade 33 rotating about a first longitudinal axis, and a second cutting blade 38 rotating about a second longitudinal axis, and the housing 7 is above the first cutting blade 33 A first housing 7A having a first upper plate portion 71a covering the first upper plate portion 71a and a first rear plate portion 71b extending downward from the first upper plate portion 71a and covering the rear of the first cutting blade 33; A second housing having a second upper plate portion 73a covering the upper side of the cutting blade 38, and a second rear plate portion 73b extended downward from the second upper plate portion 73a and covering the rear of the second cutting blade 38 7B, and the notch is continuous with the first notch 70a provided in the first back plate 71b, and the first notch 70a, and the second notch provided in the second back plate 73b. And 70b.

According to this configuration, the grass cut off by the rotation of the first cutting blade 33 and the second cutting blade 38 is passed through the first cutaway portion 70a and the second cutaway portion 70b to the outside of the first housing 7A and the second housing 7B. Can be discharged. Therefore, a large amount of cut grass can be accumulated inside the housing and then discharged as a large mass to the outside of the housing.
The rear wheel 4R is disposed rearward of the first housing 7A, and the second notch 70b is provided rearward of the first notch 70a and to the side of the rear wheel 4R.

According to this configuration, since the first notch 70a and the second notch 70b are offset in the front-rear direction, the distance between the second member 212 and the first notch 70a in the front-rear direction can be increased. it can. Thereby, the amount of grass accumulated in front of the second member 212 can be increased while decreasing the length of the first housing 7A in the front-rear direction.
In addition, the mower 1 includes an airframe 2 including a first housing 7A, a second housing 7B pivotable about a hinge axis with respect to the first housing 7A, and a motor 10 mounted on the airframe 2 A first mowing section 3A having a traveling wheel (rear wheel) 4R driven by the power of the prime mover 10, a first cutting blade 33 disposed on one side in the machine width direction and covered by the first housing 7A; A second mowing section 3B having a second cutting blade 38 disposed on the other side in the width direction and covered by the second housing 7B, and a transmission 84 for transmitting rotational power of the prime mover 10 to the traveling wheels 4R A transmission case 101 for housing, a steering handle 5 extended to the rear of the first housing 7A, a base end connected to an operation portion (adjustment lever 150) provided on the steering handle 5, a second housing 7B upon Operation cable (fourth operation cable 190) for applying or releasing a tensile force that causes the second housing 7B to swing based on the operation of the operation unit, and the transmission case 101 And a support member (second support member 202) having a cable support portion 202c for supporting the middle portion of the operation cable 190.

  According to this configuration, since the support member 202 for supporting the transmission case 101 above the first housing 7A includes the cable support portion 202c for supporting the middle portion of the operation cable 190, the middle portion of the operation cable 190 is supported. There is no need to prepare a separate member for Therefore, the number of parts can be reduced, and the mowing machine 1 can be reduced in weight. Further, since the support member 202 for supporting the transmission case 101 has sufficient strength to support the transmission case 101, the middle portion of the operation cable 190 can be reliably supported for a long period of time.

  In addition, a power transmission mechanism (second power transmission mechanism 63) for transmitting the rotational power from the prime mover 10 to the second cutting blade 38, the transmission mechanism case 102 for housing the power transmission mechanism 63, and the transmission mechanism case 102. The operation cable 190 is movable to the outer cylindrical member 191 supported by the cable support portion 202c and the outer cylindrical member 191, and the rocking link 193 is supported so as to be rockable via the pivot shaft 194. And a wire 192 connected to the rocking link 193 at a tip end thereof which is accommodated in and protrudes from the outer cylinder member 191.

According to this configuration, by the transmission mechanism case 102 accommodating the power transmission mechanism 63, the swing link 193 to which the tip end portion of the wire 192 is connected can be supported. There is no need to prepare a separate member. Therefore, the number of parts can be reduced, and the mowing machine 1 can be reduced in weight.
Further, when the amount of protrusion of the wire 192 from the outer cylinder member 191 is minimum, the cable support portion 202c, the pivot shaft 194, and the tip end portion of the wire 192 are disposed on a straight line (straight line SL).

According to this configuration, when the wire 192 is pulled, an excessive bending force is prevented from being applied to the wire 192, and bending and breakage of the wire 192 can be prevented.
Further, the support member 202 is fixed to the upper portion of the first housing 7A, and the transmission mechanism case 102 is disposed above the second housing 7B.
According to this configuration, the operation cable 190 can be routed smoothly from above the first housing 7A to above the second housing 7B.

Further, the hinge axis C1 and the wire 192 protruding from the outer cylindrical member 191 overlap in the machine width direction.
According to this configuration, excessive bending force is prevented from being applied to the wire 192 when the second housing 7B is pivoted about the hinge axis with respect to the first housing 7A. It can prevent bending and breakage.

  The mowing machine 1 includes the machine body 2, a first mowing section 3A disposed on one side in the machine width direction, a second mowing section 3B disposed on the other side in the machine width direction, and a first mowing section 3A. Rear wheel 4R disposed behind, first front wheel 4F1 disposed forward of first mowing section 3A, second front wheel 4F2 disposed forward of second mowing section 3B, and first mowing section 3A And the steering handle 5 is provided with a first handle portion 55 having a first grip portion 55a provided on one side in the machine body width direction, and the other side in the machine body width direction. And a second handle portion 56 having a second grip portion 56a provided in the vehicle body, and in the machine body width direction, the distance between the widthwise center of the rear wheel 4R and the first grip portion 55a is the width of the rear wheel 4R It is larger than the distance between the direction center and the second grip portion 56a.

  According to this configuration, the operator who grips the first gripping portion 55a and the second gripping portion 56a steers the mowing machine 1 at a position closer to one side in the machine width direction than the widthwise center of the rear wheel 4R. be able to. Therefore, when the ground where the grass is to be cut by the second mowing section 3B is an inclined surface (slope) inclined to the ground where the grass is to be cut by the first mowing section 3A, the operator is away from the inclined surface It is possible to operate the mowing machine 1 while walking safely, and it is excellent in operability.

Further, a center C5 between the first grip portion 55a and the second grip portion 56a in the machine width direction is located on one side (right side) in the machine width direction than the first front wheel 4F1 and the second front wheel 4F2. .
According to this configuration, the worker gripping the first gripping portion 55a and the second gripping portion 56a moves the mowing machine 1 at a position closer to one side in the machine width direction than the first front wheel 4F1 and the second front wheel 4F2. It can be steered. Therefore, when the first front wheel 4F1 is in contact with a flat surface and the second front wheel 4F2 is in contact with a slope (slope) and the mowing machine 1 is run, the worker safely walks away from the slope While being able to operate the mower 1, it is excellent in operability.

  Further, the motor 2 is provided with a motor 10 having an output shaft 10a mounted on the airframe 2 and extending downward, and the airframe 2 covers the first housing 7A covering the upper side of the first grass cutting portion 3A, and covers the upper side of the second grass cutting portion 3B. The steering handle 5 supports one side 51 of the first housing 7A that supports one side in the machine body width direction from below and the other side of the first housing 7B in the machine body width direction. The output shaft 10a is disposed at a position overlapping the one support portion 51 in the width direction of the vehicle body.

According to this configuration, the first housing 7A can be supported from below by the one support portion 51 of the steering handle 5 in the vicinity of the center of gravity of the motor 10 which is a heavy load. Therefore, the first housing 7A and the prime mover 10 are stably supported by the steering handle 5, and the operability of the mowing machine 1 is improved.
In addition, the motor 10 is disposed closer to the one side in the machine body width direction than the other support portion 52.

  According to this configuration, the center of gravity position of the prime mover 10 can be shifted to one side in the machine body width direction relative to the other support portion 52, so balance with the weight of the second mowing part 3B etc. on the other side in the machine body width direction. As a result, the operability of the mowing machine 1 is improved. Further, the position (centroid position) to which the center of weight of the prime mover 10 which is a heavy object is added can be brought close to the intermediate position between the first gripping portion 55a and the second gripping portion 56a, and the operability of the mower 1 is improved.

  Although the present invention has been described above, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by claims, and is intended to include all modifications within the meaning and scope equivalent to claims.

1 mower 2 airframe 3A 1st mower 3B 2nd mower 4F 1 1st front wheel 4F 2 2nd front wheel 7A 1st housing 7B 2nd housing 13 support mechanism 14 support mechanism 16 1st front wheel support arm 20 2nd front wheel support arm 23 First grass wrap preventing portion 24 Second grass wrap preventing portion 41c Rotation shaft 42 of first front wheel Projection portion 43c Rotation shaft 44 of second front wheel Projection portion 71 First housing main body 72 First front cover 72a First cut portion 73 second housing main body 74 second front cover 74a second cut portion C1 hinge axis

Claims (7)

The aircraft,
A first mowing section disposed on one side in the machine width direction,
A second mowing section that can be pivoted relative to the first mowing section about a hinge axis that is disposed on the other side in the machine width direction and extends in the front-rear direction;
A pair of front wheels including a first front wheel disposed in front of the first mowing section, and a second front wheel disposed in front of the second mowing section;
Equipped with
A mowing machine in which the pair of front wheels have an outer diameter and a width, and a common support mechanism for supporting a rotating shaft of the front wheels with respect to the body. The body includes a first housing covering at least the upper side of the first mowing section, and a second housing covering the at least upper side of the second mowing section.
The first front wheel is disposed across the front and rear of the front end of the first housing,
The mowing machine according to claim 1, wherein the second front wheel is disposed across the front and the rear of the front end of the second housing. The rotation shaft of the first front wheel is disposed forward of the first housing,
The mowing machine according to claim 2, wherein a rotation axis of the second front wheel is disposed forward of the second housing. The first housing has a first housing body that covers the upper side of the first mowing section, and a first front cover that extends downward from the front end of the first housing body.
The second housing has a second housing main body that covers the upper side of the second mowing section, and a second front cover that extends downward from the front end of the second housing main body,
The first front cover has a first cut portion cut upward from the lower end portion,
The second front cover has a second cut portion cut upward from the lower end portion,
The first front wheel is disposed across the front and the rear of the first cut portion,
The mowing machine according to claim 2 or 3, wherein the second front wheel is disposed across the front and the rear of the second cut portion.   The mowing machine according to claim 4, wherein the first front cover and the second front cover are formed of a sheet made of an elastic material.   The mowing according to any one of claims 1 to 4, wherein the first front wheel and the second front wheel have, on the other side in the vehicle body width direction, protrusions for anti-slip that project radially outward. Machine. The support mechanism includes a first front wheel support arm attached to the first housing and supporting the first front wheel, and a second front wheel support arm attached to the second housing and supporting the second front wheel. Have
The first front wheel support arm has a first grass wrap preventing portion that widens as it goes from the inner radius to the outer radius of the first front wheel,
The mowing according to any one of claims 2 to 6, wherein the second front wheel support arm has a second grass wrap preventing portion which widens as it goes from the inner radius to the outer radius of the second front wheel. Machine.

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