JP2020078294A - Mowing machine - Google Patents

Abstract

To prevent the mowed grass conveyed by a duct from being discharged outwardly.SOLUTION: A mowing machine includes a mower 4 positioned in a machine body lower part and sending out the mowed grass from a discharging part to the outside, a duct 35 connected so as to come in communication with the discharging part 34 and guiding the mowed grass sent off from the discharging part 34, and a grass collecting part positioned in the machine body rear and collecting the mowed grass guided by the duct 35. There is included a deformation prevention member H for preventing the posture deformation of a connection location to the discharging part 34 in the duct 35.SELECTED DRAWING: Figure 8

Description

  The present invention provides a mower that is located at the lower part of the machine body and sends out the cut grass outward from the discharge part, a duct that is connected so as to communicate with the discharge part and guides the cut grass that is sent out from the discharge part, and is located at the rear part of the machine body. Then, the present invention relates to a mowing machine provided with a grass collecting part for collecting the mowing grass guided by the duct.

  In this type of mower, the discharge part formed in the mower and the inlet part of the duct are inserted and connected so as to fit each other. By using the carrying wind generated by the mower, the cut grass is blown and guided to the grass collecting part through the carrying path extending from the discharge part to the inside of the duct. The duct is supported by the frame on the grass collection side. In the prior art, while allowing the mower to be lifted and lowered through a link mechanism to be lifted and lowered, the bottom of the duct is changed so that the bottom of the transport path is maintained in a continuous state. It was provided so that the posture of the main body could be changed (for example, see Patent Document 1).

JP, 2016-140264, A

  In the above-mentioned conventional configuration, since the discharge part is supported on the mower side and the duct is supported on the frame on the grass collecting part side, for example, the grass collecting part is swayed relatively to the machine body with mowing work. , The grass collection part may come into contact with other things such as ridges and a large force may be applied. In such a case, a gap may be formed between the discharge part and the inlet part of the duct at the inlet part of the duct which is a connection point with the discharge part. Then, if such a gap becomes large, there is a possibility that the grass that is guided by the air flow and passes through the inside of the duct is discharged outward through the gap.

  In particular, as described above, in the configuration in which the bottom portion of the duct is provided so that the posture can be changed with respect to the duct body, the duct body is formed in a U-shape that has a ceiling surface and left and right side surfaces and opens downward. However, there was a great risk that the lower end of the duct body would be deformed.

  Therefore, it has been desired to prevent the cut grass conveyed by the duct from being discharged to the outside.

  The characteristic configuration of the mower according to the present invention is to guide the mower located below the machine body and sending out the cut grass from the discharge section to the outside, and the mower connected to communicate with the discharge section and sent from the discharge section. Deformation that is provided with a duct and a grass collection part that is located at the rear part of the machine body and that collects the grass that is guided by the duct, and that prevents posture deformation of the connection part of the duct with respect to the discharge part. The point is that a prevention member is provided.

  According to the present invention, since the deformation preventing member can prevent the deformation of the duct, for example, the swaying motion of the machine body due to the mowing work, or that the grass collecting part comes into contact with another object such as a ridge and a large force acts Even if an external force is applied to the duct due to the above reasons, it is possible to avoid forming a large gap between the discharge portion and the inlet portion of the duct.

  As a result, it has become possible to prevent the mowing grass carried by the duct from being discharged to the outside.

  In the present invention, the deformation preventing member is provided between the connection portion of the duct with respect to the discharge portion and the machine body side fixing portion, and is received by the machine body side fixing portion to prevent posture deformation of the duct. It is preferable.

  According to this configuration, the deformation preventing member is received by the highly rigid body side fixing portion, so that the posture deformation of the duct can be reliably prevented.

  In the present invention, it is preferable that the fuselage-side fixed portion is a transmission case having a transmission mechanism for transmitting power to the traveling wheels.

  According to this configuration, the transmission case internally houses the transmission mechanism for transmitting power, has high rigidity, and is not easily deformed. Moreover, since the transmission case is provided at a position near the duct in the lower portion of the machine body for transmitting power to the traveling device, it is possible to firmly support the deformation preventing member without providing a special supporting member. ..

  In the present invention, the transmission case is configured to flange-connect a split case having a split structure, and the deformation preventing member is jointly fastened to the transmission case by a flange connecting bolt of the transmission case. It is suitable if it is.

  According to this configuration, the deformation preventing member is jointly fastened and coupled by using the bolt provided for flange coupling in the transmission case, so that the deformation preventing is prevented by a simple configuration without separately providing a separate coupling member. The member can be attached.

  In the present invention, the mower is supported by an airframe so that it can move up and down, the bottom plate of the duct is supported so that its posture can be changed as the mower moves up and down, and the posture of the bottom plate is changed in conjunction with the movement of the mower. As described above, a linking mechanism that links the mower and the bottom plate to each other is provided, and the deformation preventing member is provided between a connection portion of the duct to the discharge portion and the linking mechanism. It is preferable to prevent the duct from being deformed by being received.

  According to this configuration, when the mower is moved up and down by changing the attitude of the bottom plate of the duct as the mower is moved up and down, the attitude of the bottom surface of the duct is changed by the interlocking operation of the linkage mechanism, and the grass is smoothly conveyed. Can be maintained. By the way, in order to interlock and link the mower and the bottom plate of the duct, the linkage mechanism needs to be provided at a position near the lateral side of the duct. Therefore, by using such a linkage mechanism, it is possible to support the deformation preventing member with a simple configuration without providing a special supporting member.

  In the present invention, it is preferable that the deformation preventing member has a supporting surface along the side surface of the duct, and prevents the deformation of the posture of the duct by contacting the duct with the supporting surface.

  According to this configuration, it is easy to avoid distortion or deformation of the duct due to the deformation preventing member coming into contact with the side surface of the duct.

It is the whole mower side view. It is the whole mower top view. It is a top view of mower. It is a side view of a mower arrangement part in a grounding state. It is a vertical side view showing a discharge part and a duct in a grounded state. It is a side view of a mower arrangement part in a raised state. It is a vertical side view showing a discharge part and a duct in a raised state. It is a cross-sectional top view which shows a discharge part and a duct. It is a vertical front view of a duct. It is a perspective view which shows the cooperation structure for operation. It is a block diagram showing an abnormality detection device. It is a top view which shows the mower cooperation mechanism provided with another embodiment, and the deformation|transformation prevention member provided with another embodiment. FIG. 11 is a vertical cross-sectional front view showing a mower linking mechanism including another embodiment and a deformation preventing member including another embodiment. It is a left side view showing a mower cooperation mechanism provided with another embodiment and a deformation prevention member provided with another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, the front-rear direction and the left-right direction in the description of the present embodiment are described as follows unless otherwise specified. That is, the forward traveling direction (see arrow F in FIG. 1) is “forward” and the backward traveling direction (see arrow B in FIG. 1) is “forward” when the riding-type mower according to the present invention is running. "Rear", the direction corresponding to the right side (see arrow R in Fig. 2) based on the forward facing posture in the front-rear direction is "right", and the direction corresponding to the left side (see arrow L in Fig. 2) is "left". It is.

〔overall structure〕
As shown in FIGS. 1 and 2, the mower is self-propelled with a pair of left and right steerable front wheels 2 on the front side of the traveling machine body 1 and a pair of left and right drivable rear wheels 3 on the rear side. Is configured. A rear discharge type mower 4 is hung and supported below the vehicle body between a front wheel 2 and a rear wheel 3 in the front-rear direction so as to be vertically movable. On the rear side of the traveling machine body 1, there is provided a grass collecting container 5 as a grass collecting section for storing the grass mowed by the mower 4.

  A prime mover 6 is provided at the front of the traveling machine body 1, and a boarding operation unit 7 is provided at the rear of the prime mover 6. In the prime mover 6, the engine 8 is mounted and supported on the machine body frame 10 in a state of being installed in the engine hood 9. The power extracted from the rear side of the engine 8 is input to a hydrostatic continuously variable transmission (HST) 12 located rearward via a transmission shaft 11 extending rearward. The output from the hydrostatic stepless transmission 12 is transmitted to the left and right rear axles 3a via a chain type transmission mechanism (not shown) installed in the transmission case 13 provided at the rear part and the transmission cases 14 on both left and right sides. Then, the rear wheel 3 is driven. The transmission case 14 extends obliquely rearward and downward from the lateral side portion of the transmission case 13.

  On the front side of the engine 8, a power take-out mechanism 15 configured by a belt transmission mechanism is provided. Is transmitted to the mower 4.

  The boarding operation unit 7 is provided with a control panel 17 connected to the rear side of the engine hood 9 and a control unit 19 including a steering wheel 18 capable of steering the front wheels 2. A driver's seat 20 is installed on the rear side of the control unit 19, and a lops 21 is provided at a rear portion of the driver's seat 20.

[Abnormality detection device]
As shown in FIG. 11, a battery 22 is mounted on this mower, and electric power is supplied to a plurality of electric loads 23. A fuse 25 is separately provided in each of the power supply paths 24 for the plurality of power loads 23 to prevent an abnormality due to an overcurrent. The fuses 25 are collectively housed in the fuse box 26. Then, this mower is provided with an abnormality detection device 27 so that, for example, when any fuse 25 is blown due to work, which fuse 25 is blown is immediately known.

  The power load 23 includes a power load 23B that is turned on when the key switch 28 is turned on and a power load 23A that is supplied with power regardless of whether the key switch 28 is turned on or off. Electric power is supplied to any of the electric loads 23 via the fuse 25. A control device 29 for determining an abnormality and a plurality of LED lamps 30 corresponding to the plurality of fuses 25 are provided. Information of the power supply paths 24 of the upper side and the lower side of the fuse 25 in the power supply direction is input to the control device 29. The control device 29 causes the LED lamps 30 corresponding to the blown fuses 25 to be displayed based on the information of the power supply paths 24 at the upper side and the lower side. This allows the operator to immediately determine which fuse 25 has blown. Although FIG. 11 illustrates the case where the number of the power loads 23 is four, the number of the power loads is not limited to four, and for example, five or more power loads 23 may be provided. A fuse 25 and an LED lamp 30 are provided corresponding to the load 23.

[Moor configuration]
As shown in FIG. 3, the mower 4 has a structure in which two blades 32 are arranged side by side in the cutting blade housing 31, and the left blade 32 is driven clockwise. The blade 32 on the right side is driven counterclockwise. In this way, the blades 32 are configured to be driven to rotate in opposite directions. Then, the left blade 32 is driven in the clockwise direction and the right blade 32 is driven in the counterclockwise direction, so that the cutting grass rides on the transport wind generated by the rotation of the blades 32 and the rear center of the cutting blade housing 31. It is configured to be discharged to the rear from the discharge portion 34 formed in the vicinity. The grass clippings discharged from the discharging section 34 are guided by a grass collecting duct 35 connected to the discharging section 34, fed into the grass collecting container 5 and stored therein.

  As shown in FIG. 4, the mower 4 is supported by the machine body frame 10 so as to be able to move up and down via a lifting link mechanism 36. The lifting link mechanism 36 is provided with a pair of front and rear swing links 37A, 37B, one end of which is pivotally connected to the machine frame 10 at the upper end and the other end of which is pivotally connected to the cutting blade housing 31 at each of the left and right sides. ..

  A pair of left and right vertically extending portions 31A and 31B extending upward from the upper surface of the cutting blade housing 31 are provided upright on the front side portion and the rear side portion of the upper portion of the cutting blade housing 31, respectively. As shown in FIG. 3, the vertically extending portion 31A on the front side and the vertically extending portion 31B on the rear side each have a shape obtained by bending a plate body into a substantially L shape in plan view. It is integrally connected to the upper surface of the blade housing 31 by welding.

  One end of the swing link 37A on the front side is swingably connected to the body frame 10 of the traveling machine body 1 about a lateral axis, and the other end of the swing link 37A is positioned above the longitudinally extending portion 31A on the front side. It is swingably connected around the core. On the other hand, one end of the swing link 37B on the rear side is swingably connected to the machine frame 10 of the traveling machine body 1 about a lateral axis, and the other end is on the upper portion of the vertically extending portion 31B on the rear side. It is swingably connected about a lateral axis.

  The upper swing side of the swing link 37A on the front side and the swing link 37B on the rear side are interlockingly connected by a connecting rod 38, and a hydraulic cylinder 39 for raising and lowering is attached to an operating portion 37A1 formed on the swing link 37A on the front side. One end of is pivotally connected. The other end of the hydraulic cylinder 39 is pivotally connected to the body frame 10. The mower 4 can be moved up and down by swinging the swing links 37A and 37B as the hydraulic cylinder 39 expands and contracts. In the mowing work state, the mower 4 performs the mowing traveling while following the ground contact while the gauge wheel 40 provided at the lower end of the cutting blade housing 31 is grounded.

  As shown in FIGS. 3, 4 and 5, the discharge portion 34 is formed in the rear center of the cutting blade housing 31 in the left-right direction so as to extend obliquely rearward and upward. The discharging portion 34 includes a discharging portion main body 41 integrally connected to the cutting blade housing 31, and a guide member 42 forming a bottom portion of the discharging portion main body 41. The discharge part main body 41 has a ceiling surface 41a and side surfaces 41b on both left and right sides, and is formed in an inverted U-shape when viewed in the front-back direction. The plate-shaped guide member 42 is provided so as to cover the lower portion of the internal space formed by the discharge portion main body 41. Therefore, the discharge unit main body 41 and the guide member 42 form a substantially rectangular tubular transport path extending obliquely upward and rearward. An upper guide surface 43 that guides the grass in an upward direction is formed during the conveyance of the guide member 42.

  As shown in FIGS. 8 and 10, the guide member 42 is supported so as to be vertically rotatable with respect to the cutting blade housing 31 by the support shafts 44 that are provided over the left and right side surfaces 41b of the discharge portion main body 41. There is. The guide member 42 is linked to a first operating lever 71 provided in the vicinity of the driver's seat 20 via the first linking mechanism 70, and the guide member 42 is rocked by manually operating the first operating lever 71. It is configured to be operable. When mowing grass is clogged at the discharging section 34 in association with the mowing operation, the first claw lever 71 is reciprocally rocked so that the mowing grass can be unclogging and conveyed.

  As shown in FIGS. 3, 5, and 8, the first linkage mechanism 70 has a left and right supporting shaft portion 72, and is supported by a right rear portion of the cutting blade housing 31 so as to be vertically swingable. A first arm 73 fixed to the left end portion of the support shaft portion 72, a second arm 74 fixed to the right end portion of the support shaft 44, and a push-pull link that links the first arm 73 and the second arm 74. 75, a tension spring 76 and the like. The action of the tension spring 76 urges the first arm 73 to swing forward and is regulated by the contact portion 77, so that the guide member 42 is held in the rearward upward guiding posture. By swinging the first operating lever 71 upward and rearward, the guide member 42 is swung in the forward upward direction from the backward upward guiding posture against the biasing force of the tension spring 76. You can

  During the mowing operation, when the discharge portion 34 is clogged with the grass adhered to and accumulated on the guide member 42, the driver moves the first operation lever 71 in the vertical direction while sitting on the driver's seat 20. By swinging the guide member 42, the guide member 42 can be swung in the vertical direction, and the attached grass can be removed.

[Grass collecting duct]
Next, the grass collecting duct 35 will be described.
As shown in FIGS. 3, 4, 5, and 8, a grass collecting duct 35 that is connected so as to communicate with the discharge portion 34 formed in the cutting blade housing 31 and that guides the cut grass fed from the discharge portion 34 is provided. Has been. As shown in FIGS. 1 and 9, the duct 35 is provided so as to extend in the front-rear direction in the space formed between the left and right transmission cases 14.

  As shown in FIGS. 5, 8 and 9, the duct 35 includes a duct body 45 and a bottom plate 46. The duct body 45 has a ceiling surface 45a and left and right side surfaces 45b, and is formed in an inverted U shape when viewed in the front-rear direction. A plate-shaped bottom plate 46 is provided so as to cover the lower portion of the internal space formed by the duct body 45. Therefore, similar to the discharge section 34 of the mower 4, a substantially rectangular tubular transport path extending rearward and obliquely upward is formed in the inner region surrounded by the duct body 45 and the bottom plate 46.

  Supporting members 47 whose positions are fixed are provided on the outer sides of the left and right sides of the duct 35. Although not shown, the support member 47 is connected to the machine body frame 10, the transmission case 14, etc., and is supported in a fixed position. A bottom plate 46 of the duct 35 is supported by left and right support members 47 so as to be vertically swingable around a horizontal axis. That is, as shown in FIGS. 5, 8 and 10, the rotation support shaft 48 is provided in a state of being installed over the left and right support members 47. Left and right support arms 49 are integrally connected from the lower surface of the bottom plate 46 and extend downward and rearward. Boss portions 49A provided on the extended ends of the left and right support arms 49 are rotatably fitted and supported on the rotation support shaft 48.

  The bottom plate 46 of the duct 35 is interlocked with the second operation lever 51 provided on the side of the driver's seat 20 via the second linkage mechanism 50, and can be rotated by operating the second operation lever 51. It is configured. As shown in FIGS. 4 and 10, the second operating lever 51 is rotatably supported by the lateral shaft portion 51a, and is provided with a first arm 78 that integrally rotates at the left end of the lateral shaft portion 51a. There is. The first arm 78 and the second arm 79 continuous with the turning boss 49</b>A of the support arm 49 are interlockingly linked via a push-pull link 80. Therefore, when the second operation lever 51 is rocked, the bottom plate 46 rocks due to the linkage structure of the second linkage mechanism 50. As a result, similarly to the guide member 42, when the grass is jammed in the duct 35 due to the mowing operation, the second operation lever 51 can be reciprocally rocked to clear the grass and convey the grass. it can.

  The bottom plate 46 of the duct 35 is configured such that the attitude can be changed in conjunction with the elevating operation of the mower 4 in addition to the attitude switching by operating the operation lever 51. 4 and 6, a mower interlocking mechanism 52 interlockingly interlocking the mower 4 and the bottom plate 46 is provided so as to change the posture of the bottom plate 46 in association with the up and down movement of the mower 4. .. The mower link mechanism 52 is provided in a state of being located on the left outer side of the duct 35.

  The mower link mechanism 52 has a push-pull link 54, one end of which is interlockingly linked to the left end of a support shaft 44 that supports the guide member 42, a fulcrum pin 55 provided on the support member 47, and a push-pull link 54. The other end of the first swing arm 56 pivotally supported and swingably supported by the fulcrum pin 55, and the first swing arm 56 integrally supported by the fulcrum pin 55 and swingable. A second swing arm 57 is provided whose end abuts against the lower surface of the bottom plate 46. The push-pull link 54 includes a turnbuckle portion 54a.

  When the mower 4 rises, the support shaft 44 rises accordingly, and the push-pull link 54 is pushed to swing the first swing arm 56 and the second swing arm 57 to move the bottom plate 46 forward. The posture is changed to the up state (see FIG. 7). When the mower 4 descends, the support shaft 44 descends, the push-pull link 54 is pulled, and the first swing arm 56 and the second swing arm 57 swing, so that the bottom plate 46 is in a front-down position. Change (see FIG. 5). As a result, it is possible to prevent the bottom plate 46 from being damaged due to the up and down movement of the mower 4, and to prevent the grass from being discharged from the gap between the guide member 42 and the bottom plate 46.

  The push-pull link 54 is linked to the support shaft 44 by a long hole so that the guide member 42 does not swing in conjunction with each other even when the posture is changed by operating the operation lever 51. Even if the rocking operation is performed, the bottom plate 46 does not rock together.

[Deformation prevention member]
As shown in FIGS. 5, 8, 9, and 10, on the right side of the duct 35, in the lateral width direction outward with respect to the vicinity of the rear lower end of the right side surface 41b, which is a connection point for the discharge part 34 of the duct body 45. A duct stopper 58 is provided as a deformation preventing member H on the right side that abuts from the side and suppresses the posture change of the duct body 45 toward the outside. As shown in FIGS. 9 and 10, the duct stopper 58 is formed by bending a plate body into a substantially Z shape, and is connected to an upper mounting plate portion 58a and a lower portion of the mounting plate portion 58a, and is obliquely outward and downward. It has a relay portion 58b extending toward the side, and a contact action portion 58c which is continuous with the lower portion of the relay portion 58b and extends along the left side surface of the duct body 45. Further, a reinforcing rib 58d is integrally provided over the outer surface of the relay portion 58b and the outer surface of the contact action portion 58c.

  The duct stopper 58 is provided such that the attachment plate portion 58a is connected to the transmission case 14 and the contact action portion 58c is in contact with or near the right side surface 45b of the duct body 45. The transmission case 14 has a structure in which the split cases 14A and 14B having a split structure are flange-connected in order to facilitate the assembly of a chain type transmission mechanism or the like. As shown in FIG. 9, the left and right split cases 14A and 14B are joined together by a plurality of bolts Bo, with the flange portions formed on the split surfaces abutting each other.

  The attachment plate portion 58a of the duct stopper 58 is connected in a jointly tightened state by effectively utilizing the flange connecting bolt Bo of the transmission case 14. A washer 59 is interposed between the duct stopper 58 and the transmission case 14 so that the contact action portion 58c is pressed against the right side surface 45b of the duct 35.

  As shown in FIGS. 8, 9, and 10, on the left side of the duct 35, from the outer side in the lateral width direction with respect to the vicinity of the rear lower end of the left side surface 45b, which is a connection point for the discharge part 34 of the duct body 45. A U-shaped receiving member 60 is provided as a deformation preventing member H on the left side that is in contact with and restrains the posture of the duct body 45 toward the outside.

  As described above, the mower link mechanism 52 is provided on the left side of the duct 35. As shown in FIGS. 8 and 10, the receiving member 60 is provided in a state of being fixed to the push-pull link 54 in the mower link mechanism 52. The receiving member 60 is formed in a substantially U-shape as a whole, in which bent portions 62 that bend in the same direction are formed at both ends in the longitudinal direction of a strip-shaped member. Then, the push-pull link 54 is inserted through the insertion holes 63 (see FIG. 9) formed in the bent portions 62 on both sides, and the receiving member 60 is attached to the outside of the turnbuckle portion 54a in an integrated manner. Has been done. The receiving member 60 is provided in a state of being close to the left side surface 45b of the duct body 45. A small gap is formed between the receiving member 60 and the side surface 45b so that the swinging operation of the bottom plate 46 does not interfere with the side plate.

  By adopting the above configuration, the duct stopper 58 contacts the right side of the duct 35, so that the posture change of the duct body 45 toward the outside can be suppressed. On the left side of the duct 35, the change of the posture of the duct body 45 toward the outside can be suppressed by the contact with the receiving member 60.

[Another embodiment]
(1) [Moore link mechanism including another embodiment]
As shown in FIGS. 12, 13, and 14, the mower linkage mechanism 152 according to another embodiment includes a first swing arm 56, a second swing arm 57, a free end portion of the first swing arm 56, and a guide member. The linking member 100 is provided for linking the left end portion of the support shaft 44 of 42. The link member 100 includes a front link portion 101 having a front portion linked to the support shaft 44, a rear link portion 102 having a rear end portion linked to the free end portion of the first swing arm 56, and a front end portion of the rear link portion 102. The intermediate linking part 103 is connected to the rear end part 101a of the front linking part 101. The front linking portion 101 and the support shaft 44 are connected to each other through a long hole 104 provided in the front linking portion 101 with the support shaft 44 slidably engaged. Even if the bottom plate 46 is rocked by the second operation lever 51, the guide member 42 is prevented from rocking in conjunction, and the guide member 42 is rocked by the first operation lever 71. Also, the bottom plate 46 is interlocked so as not to swing. The middle link portion 103 is composed of a screw shaft capable of changing the connecting position of the rear link portion 102 in the middle link portion 103. The length of the link member 100 can be adjusted by changing the connecting position of the rear link portion 102 in the middle link portion 103. The reinforcing member 105 is connected to the front linking portion 101 and the rear linking portion 102. The reinforcement member 105 and the rear linking portion 102 are connected by welding. The reinforcing member 105 and the front linking portion 101 are connected by a connecting bolt 106. The bolt hole 107 provided to mount the connecting bolt 106 on the reinforcing member 105 is formed as a long hole so that the length of the linking member 100 can be adjusted by the middle linking portion 103. The front linking portion 101, the rear linking portion 102, and the reinforcing member 105 are configured by plate members.

(2) [Deformation prevention member including another embodiment]
The deformation preventing member HL including another embodiment is configured by the rear linking portion 102, as shown in FIGS. The rear linking part 102 is configured by a plate-shaped member. The deformation preventing member HL has a support surface 108 along the side surface of the duct 35, and prevents the posture deformation of the duct 35 by contacting the duct 35 with the support surface 108.

(3) In the above embodiment, the duct stopper 58 as the deformation preventing member on the right side of the duct 35 is jointly fastened to the transmission case 14 by the flange connecting bolt Bo of the transmission case 14 as the machine body side fixing portion. However, instead of this configuration, for example, a configuration may be used in which the transmission case 14 is connected by a dedicated connector separately provided, and instead of the transmission case 14, the machine body frame 10 as a machine body side fixing portion. It may be configured to be connected to. In addition, the deformation preventing member is not provided in the machine-side fixed portion, extends so as to bypass the lower side of the duct 35, and connects and holds side surfaces on both left and right sides of the duct body 45, and the like. Various configurations can be adopted.

(4) In the above embodiment, the receiving member 60 as the deformation preventing member on the left side of the duct 35 is
Although the push-pull link 54 is provided with the structure, the duct stopper 58 may be used instead of the structure.
The structure may be connected to the transmission case 14 similarly to the above, or may be connected to the machine body frame 10.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a riding-type mower equipped with a mower at the bottom of the machine body.

3 Traveling Wheels 4 Mowers 14 Transmission Cases 14A, 14B Split Cases 34 Discharge Parts 35 Ducts 46 Bottom Plates 52 Linkage Mechanisms 100 Linkage Mechanisms H Deformation Prevention Members HL Deformation Prevention Members Bo Bolts

Claims (6)

A mower located below the fuselage for sending cut grass outward from the discharge section, a duct connected to the discharge section for guiding the cut grass sent out from the discharge section, and a duct located at the rear of the fuselage A grass mower provided with a grass collecting section for collecting grass that is guided by
A mower provided with a deformation prevention member for preventing posture deformation of a connection portion of the duct with respect to the discharge portion.   The said deformation|transformation prevention member is provided between the connection location with respect to the said discharge part in the said duct, and a fuselage|body side fixed part, and is received by the said fuselage|body side fixed part, and prevents the posture deformation of the said duct. The mower mentioned.   The mower according to claim 2, wherein the machine-side fixed portion is a transmission case that internally houses a transmission mechanism that transmits power to traveling wheels. The transmission case is configured to flange-connect a split case having a split structure,
The mower according to claim 3, wherein the deformation prevention member is jointly connected to the transmission case by a bolt for connecting a flange of the transmission case. The mower is supported by the aircraft so that it can be raised and lowered,
The bottom plate of the duct is supported so that the posture can be changed as the mower is moved up and down,
A linking mechanism that links and links the mower and the bottom plate is provided so as to change the posture of the bottom plate in association with the elevation of the mower.
The deformation preventing member (H) is provided between a connection point of the duct with respect to the discharge part and the link mechanism, and is received by the link mechanism to prevent posture deformation of the duct. The mower mentioned.   The deformation preventing member has a support surface along the side surface of the duct, and prevents the posture deformation of the duct by contacting the duct with the support surface. The mower mentioned.

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