JP2007300806A - Riding type mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type mower capable of preventing the damage or breakage of a transmission mechanism for transmitting a power to a mower with a compact cover as much as possible. <P>SOLUTION: This riding type mower is equipped with a mowing device 20 linked between the front and rear wheels of a self traveling vehicle body through a linking mechanism as freely being lifted up and down, a transmission mechanism 30 for transmitting the output power of an engine of the self-traveling vehicle body to the mowing device 20 and a side cover 50 covering the outside of the transmission mechanism in the side direction of the self-traveling vehicle body. The side cover is joined over a part positioning between the vehicle body side end 8a of the self-traveling vehicle body and a linking mechanism 10 and a part positioning between the side end 21a of a mowing blade-housing at the mowing blade-housing 21 in the mowing device 20 and the linking mechanism 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a mowing device that is connected to a front and rear wheels of a self-propelled vehicle body through a link mechanism so as to be movable up and down, and a transmission mechanism that transmits an engine output of the self-propelled vehicle body to the mowing device. The present invention relates to a riding mower.

  Conventionally, as the above-described riding-type mower, there has been one disclosed in Patent Document 1, for example. Patent Document 1 discloses a traveling machine body (corresponding to a self-propelled vehicle body), a mower connected between front and rear wheels of the traveling machine body (corresponding to a mowing device), and a transmission belt (transmission mechanism) that transmits engine output to the mower. Equivalent).

JP-A-9-74856 (paragraph [0006], FIG. 1)

  In this type of riding-type mower, conventionally, the transmission mechanism has been opened toward the laterally outer side of the vehicle body between the mowing device and the vehicle body located above the grass cutting device. For this reason, when a stone or the like sometimes jumps below the vehicle body, the stone or the like collides with or clogs the transmission mechanism, and the transmission mechanism is likely to be damaged or broken.

  An object of the present invention is to provide a riding type mower capable of preventing damage and breakage of the transmission mechanism described above with a compact cover as much as possible.

According to the first aspect of the present invention, the mowing device connected to the front and rear wheels of the self-propelled vehicle body through a link mechanism so as to be movable up and down, and the engine output of the self-propelled vehicle body are transmitted to the mowing device. In a riding mower equipped with a transmission mechanism,
A horizontal cover that covers the outer side of the transmission mechanism in the lateral direction of the self-propelled vehicle body; a portion that is positioned between the vehicle body lateral end of the self-propelled vehicle body and the link mechanism; and a cutting blade housing of the cutting blade housing in the mowing device It connects over the site | part located between a horizontal end and the said link mechanism.

  According to the configuration of the first aspect of the invention, it is possible to prevent the stone and the like from entering the transmission mechanism from the lateral side of the vehicle body by the lateral cover, and it is possible to prevent the stone and the like from colliding with or clogging the transmission mechanism.

Further, according to the configuration of the first aspect of the invention, the length of the horizontal cover in the vertical direction of the vehicle body can be shortened as much as possible.
That is, in general, the mowing apparatus is grounded on the ground. This allows the mowing device to tilt left and right so that the mowing device tilts left and right with respect to the self-propelled vehicle body when the self-propelled vehicle body tilts left and right with respect to the ground, such as when a wheel rides on a raised portion of the ground. It is necessary to provide the horizontal cover with a length in the vertical direction of the vehicle body for this purpose. When the cutting device is tilted with respect to the self-propelled vehicle body, the distance between the cutting blade housing and the self-propelled vehicle body increases as the horizontal end of the cutting blade housing is reached. In the first aspect of the invention, the side cover is located between the vehicle body lateral end of the self-propelled vehicle body and the link mechanism, and the portion located between the cutting blade housing lateral end of the cutting blade housing and the link mechanism. Therefore, the mowing device is self-propelled by simply providing the horizontal cover with a shorter vertical length than the one that the horizontal cover is connected to the horizontal end of the self-propelled vehicle body and the horizontal edge of the cutting blade housing. It is possible to tilt left and right with respect to the vehicle body.

  As a result, it is possible to obtain a riding-type mower that is not easily damaged or broken by a stone of a transmission device, can be used for a long period of time, and is excellent in terms of service life and handling, such as being compact and easy to handle. .

In the second aspect of the invention, the mowing device connected to the front and rear wheels of the self-propelled vehicle body via a link mechanism so as to be movable up and down, and the engine output of the self-propelled vehicle body are transmitted to the mowing device. In a riding mower equipped with a transmission mechanism,
A lateral cover that covers the outer side of the transmission mechanism in the lateral direction of the self-propelled vehicle body is connected over the self-propelled vehicle body and a cutting blade housing of the mowing device, and is slidable and expandable in the vertical direction of the self-propelled vehicle body.

  According to the configuration of the second aspect of the invention, it is possible to prevent the stone and the like from entering the transmission mechanism from the lateral side of the vehicle body by the lateral cover, and it is possible to prevent the stone and the like from colliding with or clogging the transmission mechanism.

Further, according to the configuration of the second aspect of the invention, the horizontal cover can be made a stable cover that does not swing.
That is, it is necessary to provide the horizontal cover with expansion and contraction in the vertical direction of the vehicle body to allow the mowing device to be lifted and lowered by the link mechanism. When the horizontal cover is configured to be expanded and contracted by bending and stretching, the horizontal movement of the horizontal cover is likely to occur when the horizontal cover is shortened. Then, a situation where the side cover touches a nearby device is likely to occur. In the first aspect of the invention, since the lateral cover is configured to be slidable and extendable in the vertical direction of the vehicle body, even if the lateral cover is shortened, it can be made difficult to swing and the lateral cover is difficult to touch nearby devices. Easy to install in condition.

  As a result, the transmission device is less likely to be damaged or broken by stones and can be used for a long time, and it is easy to install the side cover in a state where it is difficult to touch nearby devices. A riding type mower can be obtained.

  In the third aspect of the invention, in the configuration of the second aspect of the invention, the lateral cover is provided with a split cover that is supported by the self-propelled vehicle body along the vertical direction of the vehicle body, and the cutting blade housing along the vertical direction of the vehicle body. And a superposed portion provided at an end portion of each split cover so that a lower end portion of the split cover on the vehicle body side and an upper end portion of the split cover on the housing side overlap in the vehicle body lateral direction. It is possible to extend and contract the slide.

  According to the configuration of the third aspect of the invention, it is possible to obtain a lateral cover that is slidable in the vertical direction of the vehicle body simply by including a pair of divided covers provided with the overlapping portion, and the lateral cover is difficult to touch nearby devices. It is possible to obtain a riding-type mower that is easy to install at low cost.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall side view of a riding mower according to an embodiment of the present invention. As shown in this figure, a riding mower according to an embodiment of the present invention is a self-propelled vehicle having a pair of left and right front wheels 1, 1 and a pair of left and right driveable rear wheels 2, 2. The mowing device 20 connected via a link mechanism 10 (see FIG. 2) between the front and rear wheels 1 and 2 of the body frame 3 of the self-propelled vehicle body, and the engine 4 provided at the front of the self-propelled vehicle body A transmission mechanism 30 (see FIGS. 2 and 3) for transmitting the output to the mowing device 20 is provided.

  The self-propelled vehicle body includes the front wheel 1, the rear wheel 2, and the vehicle body frame 3, a driving unit equipped with the engine 4, and a rear wheel drive device that supports the left and right rear wheels 2 and 2 in a freely driveable manner. 5. A driving part equipped with a steering wheel 6 located near the rear side of the driving part is provided. In addition to the steering wheel 6, the driving unit includes a driving seat 7 provided above the rear wheel drive device 5 and a driving unit floor 8 positioned below the front of the driving seat 7.

  The vehicle body frame 3 is composed of a pair of left and right main frames 3a, 3a and the rear wheel drive device 5 connected to the rear portions of the main frames 3a, 3a. The engine 4 is a vertical engine in which an output shaft 4a (see FIG. 2) extends downward from the engine body. The rear wheel drive device 5 includes a hydrostatic continuously variable transmission 9 (hereinafter, abbreviated as a continuously variable transmission 9) in which an input shaft 9a extends upward (see FIG. 11). As shown in FIGS. 2 and 11, the input shaft 9 a of the continuously variable transmission 9 is linked via a transmission belt 32 to a travel output pulley 31 that the output shaft 4 a of the engine 4 is provided so as to be integrally rotatable. That is, the rear-wheel drive device 5 inputs the output of the engine 4 to the input shaft 9a of the continuously variable transmission 9 via the transmission belt 32, and converts it into driving force on the forward side and the reverse side by the continuously variable transmission 9. At the same time, on both the forward side and the reverse side, the speed is changed steplessly and transmitted to the left and right rear wheels 2 and 2.

  FIG. 1 shows the structure of the mowing device 20 in a side view, and FIG. 3 shows the structure of the mowing device 20 in a plan view. As shown in these drawings, the mowing device 20 includes a cutting blade housing 21 and a plurality of blade-shaped rotary cutting blades 22 provided in the cutting blade housing 21 so as to be rotatably arranged side by side in the lateral direction of the self-propelled vehicle body. A cutting blade drive mechanism 23 provided on the upper surface side of the cutting blade housing 21 and a gauge ring 24 provided outside the cutting blade housing 21 are provided.

  FIG. 3 shows the structure of the cutting blade drive mechanism 23 in plan view, and FIG. 8 shows the structure of the cutting blade drive mechanism 23 in rear view. As shown in these drawings, the cutting blade drive mechanism 23 is a cutting blade drive pulley provided rotatably at the end of the rotary support shaft 22a of each rotary cutting blade 22 that protrudes from the upper surface side of the cutting blade housing 21. 25, an input shaft 26 provided on the upper surface side of the rear portion of the cutting blade housing 21, a transmission pulley 27 provided with the input shaft 26 so as to be integrally rotatable, and a transmission belt wound around each of the cutting blade drive pulleys 25. 28. The transmission belt 28 is also wound around a plurality of guide pulleys 29. That is, the cutting blade drive mechanism 23 transmits the driving force of the input shaft 26 from the transmission pulley 27 to each cutting blade drive pulley 25 via the transmission belt 28, and drives each rotary support shaft 22a. The blade 22 is driven to rotate around the axis of the rotary support shaft 22a in the vertical direction of the vehicle body.

  FIG. 3 shows the structure of the transmission mechanism 30 in a plan view, and FIG. 6 shows the structure of the transmission mechanism 30 in a side view. As shown in these drawings, the transmission mechanism 30 includes a work output pulley 33 that is disposed on the output shaft 4a of the engine 4 on the lower side of the vehicle body than the travel output pulley 31 so as to be integrally rotatable, and the cutting blade. An input pulley 34 disposed on the input shaft 26 of the drive mechanism 23 above the transmission pulley 27 and rotatably provided integrally therewith, and a transmission belt wound around the input pulley 34 and the work output pulley 33. 35. That is, the transmission mechanism 30 transmits the output from the output shaft 4 a of the engine 4 to the input pulley 34 via the transmission belt 35, and transmits the output to the input shaft 26 of the cutting blade driving mechanism 23 by the input pulley 34.

  FIG. 2 shows a structure of the link mechanism 10 in a side view, and FIG. 8 shows a structure of a part of the link mechanism 10 in a rear view. As shown in these drawings, the link mechanism 10 includes a pair of left and right main links 11 and 11 each having a front end portion rotatably supported on the front end side of the pair of left and right main frames 3a and 3a, and a pair of left and right main links. A pair of left and right balance links 12 and 12 that are rotatably connected to the middle portion of the links 11 and 11 are provided. The rear end portion of each main link 11 is rotatably connected to a fixed bracket 16 on the upper surface side of the rear end portion of the mowing blade housing 21 of the mowing device 20. One end side of each balance link 12 is rotatably connected to the main frame 11. The other end side of each balance link 12 is connected to a fixed bracket 17 on the upper surface side of the front end portion of the cutting blade housing 21 via a connection link 13.

  In the link mechanism 10, an elevating lever 15 (see FIG. 1) provided on the lateral side of the driver's seat 7 of the driving unit swings up and down while being linked to the rear end portion of the cutting blade housing 21 via the elevating link 14. As a result of the dynamic operation, the pair of left and right main links 11 and 11 are swung up and down with respect to the vehicle body frame 3, and the mowing apparatus 20 is lowered while the pair of left and right gauge wheels 24 and 24 are in contact with the ground. Ascending / descending operation is performed between the state and the non-working state in which each gauge wheel 24 is lifted from the ground.

  That is, in order to perform lawn mowing and mowing work, the lifting lever 15 is swung, the link mechanism 10 is swung downward, and the mowing apparatus 20 is lowered. When the mowing apparatus 20 is in the descending work state, the self-propelled vehicle body is caused to travel. Then, the transmission mechanism 30 transmits the output from the engine 4 to the input shaft 26 of the cutting blade drive mechanism 23 of the mowing device 20. The mowing apparatus 20 drives the rotary cutting blades 22 around the axis of the rotary support shaft 22a by the cutting blade drive mechanism 23, cuts grass and grass with the rotating rotary cutting blades 22, and cuts the cut grass. The cut grass is transported in the lateral direction of the body of the cutting blade housing 21 by the conveying wind generated by the rotation of each rotary cutting blade 22, and the discharge port 21b positioned at the lateral end of the cutting blade housing 21 (see FIG. 7). To the ground.

  As shown in FIG. 1, the riding mower includes a transmission cover device K provided across the mowing device 20 and the self-propelled vehicle body so as to cover the transmission mechanism 30.

  FIG. 4 is a perspective view of the transmission cover device K in an exploded state. FIG. 5 is a longitudinal sectional view of the transmission cover device K. FIG. 7 is a cross-sectional view of the transmission cover device K. As shown in these drawings, the transmission cover device K includes a pair of left and right output portion covers 40, 40, a pair of left and right lateral covers 50, 50, one front cover 41, and one rear cover 60. ing.

  The pair of left and right output portion covers 40, 40 are arranged on the front side of the vehicle body with respect to the lateral cover 50, and are distributed and connected to the pair of left and right main frames 3a, 3a. One output portion cover 40 includes a notch-shaped ring hole 43 provided on the upper end side of the support piece portion 42 located on the rear end side of the output cover 40. The ring hole 43 is inserted with a drag ring 43a (see FIG. 8) for interlocking the steering wheel 6 with the knuckle arms (not shown) of the left and right front wheels 1 and 1.

  4 shows a perspective structure of each lateral cover 50 in an exploded state, and FIG. 5 shows a structure of one lateral cover 50 in a side view. FIG. 8 is a longitudinal rear view of the horizontal cover 50. As shown in these drawings, each lateral cover 50 includes a split cover 51 supported by the one main frame 3 a of the self-propelled vehicle body and a split cover 52 connected to the upper surface side of the cutting blade housing 21. Configured.

  The front end side of the split cover 51 (hereinafter referred to as the vehicle body side split cover 51) connected to the main frame 3a is a support piece that protrudes laterally outward from the main frame 3a on the rear end side of the output cover 40. The extended end portion of the portion 42 is continuously provided. The rear end side of the vehicle body side split cover 51 is connected to an extended end portion of a support arm 53 that extends from the main frame 3a outwardly to the vehicle body. As a result, each vehicle body side split cover 51 has a left or right lateral side that is the same as the side on which the vehicle body side split cover 51 is located, of the left and right lateral ends 8a formed at the lateral ends of the driving section floor 8 of the self-propelled vehicle body. Positioned between the end 8a and the left and right main links 11 and the balance links 12 on the left and right sides of the link mechanism 10 between the left and right main links 11 and the balance links 12 on the same side as the side where the vehicle body side cover 51 is located. Is supported along the vertical direction of the vehicle body.

  The lower end side of the divided cover 52 (referred to as the housing-side divided cover 52) connected to the cutting blade housing 21 is a support 54 fixed to the upper surface side of the drive mechanism cover 70 provided on the upper surface side of the cutting blade housing 21. A pair of front and rear hinges are supported so as to be rotatable around a vehicle body longitudinal axis 54a (see FIG. 4). The upper end side of the housing-side divided cover 52 is sandwiched by a plurality of cover pressing plates 55 and the vehicle-body-side divided cover 51 that are arranged on the outer surface side of the vehicle-side divided cover 51 in the vehicle front-rear direction. Thereby, each housing side division | segmentation cover 52 is the same as the side where the housing side division | segmentation cover 52 is located among the left and right side ends 21a of the cutting blade housing 21, and the said link mechanism 10 Of the left and right main links 11 and the balance links 12 in the left and right main links 11 and the balance links 12 on the same side as the side where the housing-side divided cover 52 is located. It is supported alongside. The overlapping portion 51a provided at the lower end portion of the vehicle body side divided cover 51 and the overlapping portion 52a provided at the upper end portion of the housing side divided cover 52 are overlapped in the vehicle body lateral direction in a state of being relatively slidable in the vehicle body vertical direction. ing. The overlapping portion 52 a of the housing side divided cover 52 is located on the laterally outer side of the vehicle body than the overlapping portion 51 a of the vehicle body side divided cover 51. Each of the drive mechanism covers 70 covers the vicinity of the cutting blade drive pulley 25 that is located closest to the mowing device lateral end among the plurality of cutting blade drive pulleys 25 of the cutting blade drive mechanism 23.

  As a result, each lateral cover 50 has the same left or right vehicle body lateral end 8a as the side where the lateral cover 51 is located among the left and right vehicle body lateral ends 8a of the self-propelled vehicle body, and the left side of the link mechanism 10. The left side or the right side of the cutting blade housing 21 and the body part located between the left side or the right side main link 11 and the balance link 12 on the same side as the side of the right main link 11 and the balance link 12 where the lateral cover 51 is located. Of the lateral ends 21a, the left or right lateral end 21a is located on the same side as the lateral cover 51, and the left and right main links 11 and the balance links 12 of the link mechanism 10 are disposed. It is connected over the housing part located between the main link 11 and the balance link 12 on the same left or right side as the side. FIG. 10A is a vertical cross-sectional view of the horizontal cover 50 in an extended state, and FIG. 10B is a vertical cross-sectional view of the horizontal cover 50 in a shortened state. As shown in these drawings, each horizontal cover 51 slides and expands in the vertical direction of the vehicle body when the housing side divided cover 52 moves up and down relative to the vehicle body side divided cover 51.

  The front end side of the front cover 41 is connected to the lower part of the front end side of the pair of left and right output portion covers 40 around a shaft axis 44a facing the vehicle body via a pair of left and right connecting pieces 44, 44 provided on the front end side of the front cover 41. It is connected so that it can rotate freely. The rear end portion 41 a of the front cover 41 is placed on the upper surface side of the front end portion of the cutting blade housing 21. As a result, the front cover 41 swings up and down with respect to the self-propelled vehicle body around the shaft core 44 a located on the front end side of the front cover 41.

  The rear cover 60 includes a split cover 62 on the vehicle body side connected to the pair of left and right main frames 3a, 3a by a connecting piece 61 on the rear side of the pair of left and right horizontal covers 50, 50, and a cutting blade housing 21. A housing-side divided cover 64 connected to the rear end portion by a pair of left and right connecting pieces 63 is provided. The overlapping portion 62a provided at the lower end portion of the split cover 62 on the vehicle body and the overlapping portion 64a provided at the upper end portion of the split cover 64 on the housing side overlap in the longitudinal direction of the vehicle body while being relatively movable in the vertical direction of the vehicle body. ing. The mowing device 20 that is moved up and down between the overlapping portion 62a of the vehicle body-side split cover 62 and the overlapping portion 64a of the housing-side split cover 64 causes the main link 11 to swing up and down. A gap is provided to enable movement.

  As a result, the rear cover 60 slides and expands in the vertical direction of the vehicle body when the housing-side divided cover 64 moves up and down with respect to the vehicle body-side divided cover 62.

  The pair of left and right output portion covers 40, 40, the front cover 41, and the vehicle body side divided cover 51 and the housing side divided cover 52 in the pair of left and right lateral covers 50, 50 are punched so as to have excellent air permeability. A cover body made of metal is combined with a cover frame made of strip metal so as to have excellent shape retention and strength. A split cover 62 on the vehicle body side and a split cover 64 on the housing side of the rear cover 60 are constituted by sheet metal members. That is, the rear cover 60 is located near the rear wheel 2, and stones bounced by the rear wheel 2 are likely to hit strongly. However, the rear cover 60 has a strength to firmly receive the stone so that the rear cover 60 is not easily deformed even when the stone strikes strongly.

  That is, the transmission cover device K covers the outside in the lateral direction of the vehicle body of the portion of the transmission mechanism 30 located near the engine output shaft 4a by the pair of left and right output portion covers 40, 40, and the front cover 41 The lower part of the transmission mechanism 30 located near the engine output shaft 4a is covered, and the pair of left and right lateral covers 50, 50 are located on the rear side of the vehicle body with respect to the output part cover 40 of the transmission mechanism 30. The outer side of the portion in the lateral direction of the vehicle body is covered, and the rear cover 60 covers the vehicle body rear side of the transmission mechanism 30 near the rear side of the pair of left and right horizontal covers 50, 50.

  FIG. 5 shows a side surface state of the transmission cover device K when the mowing device 20 is lowered, and FIG. 6 shows a side surface state of the transmission cover device K when the mowing device 20 is lowered. As shown in these figures, when the front wheel 1 or the rear wheel 2 climbs on a raised portion of the ground, and the self-propelled vehicle body tilts to the left and right with respect to the ground, the mowing device 20 is grounded by the gauge wheel 24. And the connecting pin hole and the connecting piece 61 positioned between the cutting blade housing 21 and the main link 11 enable the cutting blade housing 21 to be inclined to the left and right with respect to the self-propelled vehicle body. Tilt right and left with respect to the self-propelled vehicle. As described above, when the mowing device 20 is tilted to the left and right with respect to the self-propelled vehicle body, and when the mowing device 20 is moved up and down, the front cover 41 is configured to support the cutting blade housing 21 with respect to the rear end portion 41a. Therefore, it swings up and down with respect to the self-propelled vehicle body around the axis 44a. The left and right lateral covers 50, 50 are slidably extended and contracted to support the cutting blade housing 21 with respect to the housing side divided cover 52. The rear cover 60 slides and expands to support the cutting blade housing 21 with respect to the divided cover 64 on the housing side. As a result, the transmission cover device K allows the mowing device 20 to move up and down with respect to the self-propelled vehicle body, and acts to cover the transmission mechanism 30 regardless of whether the mowing device 20 moves up and down with respect to the self-propelled vehicle body or tilts left and right.

  FIG. 10C is a longitudinal sectional view in a state where the housing side divided cover 52 of one of the horizontal covers 50 is laid down. As shown in this figure, each presser plate 55 is lifted and swung around the axis of a connecting shaft 56 that connects the presser plate 55 and the vehicle body side divided cover 51, so that each presser plate 55 has a housing side. The clamping action with respect to the divided cover 52 is released. Then, the housing-side divided cover 52 can be swung in a state where the housing-side divided cover 52 is lying on the lateral side of the vehicle body with respect to the cutting blade housing 21 around the shaft core 54a. As a result, the mowing device 20 can be removed from the link mechanism 10 and pulled out from the lower side of the vehicle body frame 3 to the lateral outer side of the self-propelled vehicle body.

  As shown in FIG. 2, the riding mower includes an input portion cover device 71 provided at the rear portion of the vehicle body frame 3 so as to cover the vicinity of the input of the continuously variable transmission 9.

  FIG. 2 shows the structure of the input unit cover device 71 in a side view, and FIG. 11 is a longitudinal rear view of the input unit cover device 71. As shown in these drawings, the input unit cover device 71 includes a belt upper cover 72 that covers the top of the transmission belt 32 wound around the input shaft 9a of the continuously variable transmission 9, and a belt pulley that the input shaft 9a includes. 9b and a fan upper front cover 73 covering the upper front of the cooling fan 9c, a fan upper rear cover 74 covering the rear and upper rear of the belt pulley 9b and the cooling fan 9c, and a fan lower cover covering the lower of the cooling fan 9c 75.

  The belt upper cover 72, the fan lower cover 75, and the fan upper rear cover 74 are made of punched metal so as to have excellent air permeability. The fan upper front cover 73 is made of sheet metal. The belt upper cover 72, the fan lower cover 75, and the fan upper front cover 73 are supported by the pair of main frames 3a and 3a. The fan upper rear cover 74 is connected to the upper end portion of the fan upper front cover 73 and the pair of main frames 3a, 3a. As shown in FIG. 12, the fan upper rear cover 74 is configured by combining two divided covers 74b and 74b produced by dividing the fan upper rear cover 74 in the lateral direction of the vehicle body along a dividing line 74a.

[Another Example]
Instead of configuring the side cover 50 to be slidable and extendable as in the above-described embodiment, the vehicle body lateral end 8a and the link mechanism 10 of the self-propelled vehicle body may be configured by a cloth or a bellows so as to expand and contract in the vertical direction of the vehicle body by bending and stretching. If it connects over the site | part located between and the site | part located between the cutting blade housing horizontal end 21a of the cutting blade housing 21 and the link mechanism 10, the objective of this 1st invention can be achieved.

  When the horizontal cover 50 is configured to be slidable and extendable in the vertical direction of the vehicle body, the portion where the horizontal cover 50 is positioned between the vehicle body lateral end 8a of the self-propelled vehicle body and the link mechanism 10 and the cutting blade housing 21 are configured. The second invention of the present invention may be connected to the horizontal end of the self-propelled vehicle body and the horizontal end of the cutting blade housing 21 instead of connecting to the portion positioned between the horizontal end 21a of the cutting blade housing and the link mechanism 10. Can achieve the purpose.

Side view of the entire riding mower Side view of link mechanism and input unit cover device Plan view of transmission mechanism and cutting blade drive mechanism Perspective view of transmission cover device in disassembled state Longitudinal side view of the transmission cover device when the mowing device is lowered Longitudinal side view of transmission cover device with mowing device raised Transverse plan view of transmission cover device Rear view of the horizontal cover Partial perspective view of the side cover (A) is a vertical cross-sectional view of the horizontal cover in the extended state, (B) is a vertical cross-sectional view of the horizontal cover in a shortened state, and (C) is a vertical cross-sectional view of the horizontal cover in the housing-side divided cover lying down state. Figure Rear view of input unit cover device Perspective view of the fan upper rear cover

Explanation of symbols

4 Engine 8a Car body lateral end 10 Link mechanism 20 Mowing device 21 Mowing blade housing 21a Mowing blade housing lateral end 30 Transmission mechanism 50 Transverse cover 51 Car body side split cover 51a Car body side split cover overlapping portion 52 Housing side split cover 52a Overlapping part of the divided cover on the housing side

Claims (3)

Riding mower equipped with a mowing device connected to front and rear wheels of a self-propelled vehicle body through a link mechanism so as to be movable up and down, and a transmission mechanism for transmitting the output of the engine of the self-propelled vehicle body to the mowing device Because
A horizontal cover that covers the outer side of the transmission mechanism in the lateral direction of the self-propelled vehicle body; a portion that is positioned between the vehicle body lateral end of the self-propelled vehicle body and the link mechanism; and a cutting blade housing of the cutting blade housing in the mowing device A riding-type mower connected to a portion located between a lateral end and the link mechanism. Riding mower equipped with a mowing device connected to front and rear wheels of a self-propelled vehicle body through a link mechanism so as to be movable up and down, and a transmission mechanism for transmitting the output of the engine of the self-propelled vehicle body to the mowing device Because
Riding that covers the outer side of the transmission mechanism in the lateral direction of the self-propelled vehicle body is connected to the mowing blade housing of the mowing device and is slidable in the vertical direction of the self-propelled vehicle body. Type mower.   The lateral cover includes a split cover supported by the self-propelled vehicle body along the vertical direction of the vehicle body, and a split cover supported by the cutting blade housing along the vertical direction of the vehicle body. 3. The slide extension according to claim 2, further comprising: an overlapping portion provided at an end portion of each split cover so that a lower end portion and an upper end portion of the split cover on the housing side overlap in a lateral direction of the vehicle body. Riding mower.

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