JP4773314B2 - Mower - Google Patents

Description

  The present invention relates to a mower having a mower connected between a front wheel and a rear wheel in a traveling machine body.

  As a conventional technique, for example, as disclosed in Patent Document 1, a front wheel support portion (refer to FIG. 3 of Patent Document 1) that supports a front wheel support frame (18 of FIG. 2 of Patent Document 1) on which a front wheel is mounted. A technique related to a mower configured to cover 12a) with a protective cover (12a in FIG. 2 of Patent Document 1) from the front and above is known.

JP 2004-114750 A (FIGS. 2 and 3)

In the protective cover of the conventional mower disclosed in Patent Document 1, the opening / closing structure of the protective cover is not specifically disclosed, but is swung downward around the axis of the lower end portion of the protective cover. It is considered that the protective cover was configured to be opened.
However, like the protective cover of a conventional mower, if the protective cover is opened by swinging downward around the axis of the lower end of the protective cover, the tip of the protective cover contacts the ground and the protective cover There was a problem that the protective cover could not be opened greatly, and a problem that the tip of the protective cover touched the ground and the protective cover was damaged. As a result, there is a problem that it is necessary to pay attention to the opening and closing of the protective cover, and the workability of the maintenance work of the front wheel support portion performed by opening the protective cover is deteriorated.

  Also, if a protective cover that covers the front and upper part of the front wheel support part is attached, when transporting the mower on a truck, etc., carefully protect the truck's bed by curing the protective cover so that the protective cover is not damaged. There was a need to load mowers. For this reason, there has been a problem that workability of loading work for loading the mower on a loading platform such as a truck is deteriorated.

In addition, when a protective cover that covers the front and top of the front wheel support part is attached, when transporting the mower on a truck, etc., a large space in front of the protective cover should be secured so as not to damage the protective cover. There was a need to load mowers. For this reason, there has been a problem that the mower cannot be efficiently loaded on a loading platform such as a truck, and the cost of transporting the mower increases. More specifically, for example, if a large space in front of the protective cover is secured so as not to damage the protective cover, it can be loaded onto a loading platform such as a truck having the same width as a model not equipped with the protective cover. There has been a problem that the number of mowers has decreased, and the transportation cost of trucks per mower has increased.
An object of the present invention is to realize a mower capable of improving the workability of daily maintenance work and loading work loaded onto a loading platform such as a truck and reducing the transportation cost.

[I]
(Constitution)
The first feature of the present invention is that the mower is configured as follows.
A mower is connected between the front wheels and the rear wheels of the traveling machine body, and a front wheel support frame that supports the front wheels of the traveling machine body is swung about a front and rear axial center between a traveling posture and a maintenance posture on a front wheel support portion that faces left and right. capable equipped, provided with a protective cover for covering the front and upper side of the front-wheel support portion in the front-wheel support portion, oscillating the protective cover, the lateral direction of the pivot axis about which is positioned above the front-wheel support portion Configure as possible
In the open state in which the protective cover is opened upward, the position of the pivot axis of the protective cover is set so that the front end of the protective cover in the open state is located behind the rear end of the front wheel support frame . It is arranged behind the rear end of the front wheel support frame and at a position higher than the floor surface of the front end portion of the deck panel .

(Function)
According to the first feature of the present invention, the protective cover is provided to cover the front and upper sides of the front wheel support portion, and the protective cover is configured to be swingable around the left and right axial center located above the front wheel support portion. The front and upper sides of the front wheel support part covered with the protective cover can be opened by swinging the protective cover upward around the left and right axial centers located above the front wheel support part. Therefore, the protective cover can be greatly opened upward, and the protective cover is less likely to be damaged by opening and closing the protective cover.

  Specifically, for example, when the protective cover is opened and closed by swinging downward around the axis of the lower end of the protective cover, the tip of the protective cover is in contact with the ground. Therefore, the protective cover can be greatly opened upward, and the protective cover is less likely to be damaged by opening and closing the protective cover.

  According to the first aspect of the present invention, the protective cover is configured so that the front end of the protective cover in the state where the protective cover is opened upward is positioned rearward beyond the front end of the front wheel support portion. The front end of the protective cover can be positioned behind the front end of the front wheel support part. Therefore, by opening the protective cover upward, the mower can be efficiently loaded on a loading platform such as a truck without damaging the protective cover.

  Specifically, for example, by opening the protective cover upward, it is possible to load the mower on a loading platform such as a truck without damaging the protective cover without curing the protective cover. The mower can be loaded on a loading platform such as a truck without damaging the protective cover without securing a large front space. Therefore, the mowing machine can be efficiently loaded on a loading platform such as a truck while reducing the distance between the front and rear of the plurality of mowing machines without damaging the protective cover.

(The invention's effect)
According to the first feature of the present invention, the protective cover can be greatly opened upward, and the protective cover is less likely to be damaged by opening and closing the protective cover. The workability of maintenance work can be improved.

  According to the first feature of the present invention, by opening the protective cover upward, the mower can be efficiently loaded on the loading platform such as a truck without damaging the protective cover. The workability of the loading operation of loading the machine can be improved, and the transportation cost of the mower can be reduced.

[Overall configuration of riding mower]
FIG. 1 shows an overall side view of a riding mower equipped with a protective cover 40 according to the present invention, and FIG. 2 shows an overall plan view. As shown in FIGS. 1 and 2, the riding mower is disposed on the lower abdomen of the traveling machine body 3 located in the middle portion between the pair of left and right front wheels 1 and the pair of left and right driving rear wheels 2 configured as caster wheels. The mower M is supported by being lifted via the link mechanism 4 so that the mower M can be lifted and lowered substantially parallel to the ground by moving the link mechanism 4 up and down.

  An engine 5 is mounted on the rear part of the traveling machine body 3, a driving seat 6 is provided in front of the engine 5, and a control lever 7 that performs a traveling operation of the riding mower is provided on both the left and right sides of the driving seat 6. Has been. A resin deck panel 8 is mounted on the upper portion of the vehicle body frame 15 in front of the driver seat 6 to form a driver floor. A gate-type tipping protection frame 9 is provided behind the driver seat 6 and is configured such that the tipping protection frame 9 can be tilted backward by inserting and removing a pin at the position of the bracket 9c.

  As shown in FIG. 12, a universal joint 10 extends forward from a forward output shaft 5 a of the engine 5, and the universal joint 10 supports the rear wheel 2 via a transmission shaft 11 and a universal joint 12. It is linked to the input shaft 13 a of the axle case 13. The rear axle case 13 has a built-in hydrostatic continuously variable transmission (not shown), and is connected from the engine 5 to the input shaft 13a of the rear axle case 13 via the universal joint 10, the transmission shaft 11, and the universal joint 12. The transmitted power is branched to the left and right and transmitted to the transmission shaft 14 that supports the left and right rear wheels 2 via the hydrostatic continuously variable transmission, thereby changing the traveling speed according to the operation of the left and right control levers 7. And the traveling machine body 3 is configured to be able to turn.

  As shown in FIGS. 1 and 2, the vehicle body frame 15 of the traveling machine body 3 includes a pair of left and right main frames 16 and a pair of left and right vertical plate-like rear frames 17 extending rearward from the main frame 16. A horizontal front frame 18 positioned in the front end of the main frame 16 and shaped like a downward U, a horizontal rear horizontal frame 19 positioned at the rear end of the rear frame 17, and a front of the front frame 18 The front-wheel support part 20 fixed to the part is firmly fixed by welding, and a front-wheel support frame 29 described later is supported on the front-wheel support part 20 so as to be capable of rolling.

  A detachable blower 21 is disposed on the right side of the mower M, and a detachable duct 26 extends from the blower 21 toward the grass collector 22 disposed behind the traveling machine body 3. The mowing grass cut by the mower M is transported by the blower 21 to the grass collecting machine 22 behind the traveling machine body 3 so that the mowing grass can be collected.

  A pair of left and right work lights 23 are provided on the upper part of the fall protection frame 9, and when the mowing work is performed in the early morning, evening, and night, the front of the mower is brightly illuminated by the work lights 23, so that the front of the mower The field of view can be secured and the workability of mowing work can be improved. Further, as will be described later, since the work light 23 is configured so that the irradiation angle can be changed and adjusted, the work light 23 can be used when performing maintenance work or cleaning work on the riding mower in the early morning, evening, or night. It is possible to illuminate the maintenance location by changing and adjusting the irradiation angle, and it is possible to improve workability such as maintenance work and cleaning work.

  The brackets 24 for fixing the work light 23 are fixed to both side portions of the horizontal frame 9a of the fall protection frame 9 by U bolts 25. A mounting hole is machined in the front end portion of the bracket 24, and a work light 23 is mounted in the mounting hole so that the mounting angle can be changed and adjusted. In this way, by providing the work lights 23 on the left and right above the rear part of the driver seat 6, the ride-type grass mower can be used without the driver blocking the irradiation of the work lights 23 from above the driver seated on the driver seat 6. Can be widely illuminated by the left and right work lights 23, 23.

  The work light 23 is connected to a battery (not shown) via a switch (not shown) provided on the driver's seat 6 so that the work light 23 can be irradiated by operating the switch from the driver's seat 6. It is configured. The wiring from the work light 23 to the switch provided on the driver's seat 6 is wired to the driver's seat 6 along the inner surface side of the fall protection frame 9 so that the wiring itself does not get in the way.

[Jack structure]
3 and 6 are detailed views of the vicinity of the jack 30 mounted on the riding mower. FIG. 3 shows a plan view of the vicinity of the jack 30, FIG. 6 (a) shows a front view of the vicinity of the jack 30 in a traveling state where the jack is not raised, and FIG. 6 (b) shows a state in which the jack is raised. The front view of the jack 30 vicinity is shown.

  As shown in FIGS. 3 and 6, a front wheel support portion 20 is fixed to the front side of the front frame 18, and the boss portion 20 a fixed to the front wheel support portion 20 and the front frame 18 are fixed. A front wheel support frame 29 formed in the shape of a square pipe is supported by the boss portion 18a through a connecting shaft 31 so as to be swingable around a longitudinal axis (see FIG. 4). A front wheel bracket 32 that supports the front wheel 1 is supported at both ends of the front wheel support frame 29 so as to be rotatable about a vertical axis, and the front wheel support frame 29 is rotated about a longitudinal axis of the connecting shaft 31. Thus, the front wheel 1 can be jacked up by rolling with respect to the traveling machine body 3.

  A bracket 33 extending downward is fixed to an intermediate portion of the front wheel support frame 29, and a front-rear linking pin 34 fixed to the rod-side end portion of the jack 30 is attached to the lower end portion of the bracket 33. Are linked. The bracket 33 has a long hole 33a for slidably linking the linkage pin 34. When the vehicle travels on a road surface that is inclined to the left or right or an uneven road surface, the bracket 33 is attached to the jack 30 by the long hole 33a. When the front wheel support frame 29 rolls relative to the vehicle body frame 15 by relative rotation, the traveling machine body 3 can be maintained in the horizontal or horizontal posture in the left-right direction.

  The jack 30 is disposed at a position overlapping the front frame 18 in plan view, and the end of the jack 30 on the tube side is directed downward from the right end of the front frame 18 formed in a downward U-shape. The extended bracket 26 is supported through a pin 35 so as to be swingable around an axial center in the front-rear direction. A telescopic handle 36 is swingably supported at the right end portion of the jack 30, and when the jack 30 is not used, the distal end portion of the telescopic handle 36 is attached to a holder 37 provided on the upper surface side of the front wheel support portion 20. By fitting, the telescopic handle 36 is configured not to interfere with traveling and mowing work.

  A pair of front and rear plates 38 constituting the front wheel support portion 20 are formed with through holes 38a extending in the front and rear directions, and the two holding pins 39 arranged in the left and right are inserted into the through holes 38a so as to pass through the front and rear. Has been. In the traveling state in which the jack 30 is not extended, the holding pin 39 has a front support frame so that the lower surface side of the holding pin 39 does not come into contact with the upper surface side of the front wheel support frame 29 within the range of rolling by the elongated hole 33a. 29 with a certain interval.

  By pulling out the two holding pins 39 and rotating the telescopic handle 36, the jack 30 can be extended. With the jack 30 extended, by inserting the holding pin 39 into the through hole 38a again, Even if the jack 30 is accidentally shortened, the holding pin 39 is supported by the lower surface side of the front wheel support frame 29 coming into contact with the holding pin 39, and the jack 30 is extended in the state where the jack 30 is extended. The position can be maintained. Therefore, the maintenance work of the mower M can be performed smoothly, and the workability of the maintenance work can be improved.

  As shown in FIG. 6 (b), when the expansion / contraction handle 36 is removed from the holder 37 and the expansion / contraction handle 36 is rotated and the jack 30 is extended with the protective cover 40 to be described later open, The front wheel support frame 29 swings around the axial center of the connecting shaft 31 in the front-rear direction, the right front wheel 1 is grounded, the left front wheel 1 is separated from the ground, and the front frame 18 is lifted upward. In this state, the inside of the mower M can be inspected and maintained. In addition, it can return to a driving | running | working state by removing the holding pin 39 and shortening the jack 30. FIG.

[Detailed structure of protective cover]
The detailed structure of the protective cover 40 will be described with reference to FIGS. 4 and 5. FIG. 4 shows a longitudinal side view around the protective cover 40, and FIG. 5 shows a front view around the protective cover 40 in a state where the protective cover 40 is opened.

  As shown in FIGS. 4 and 5, the protective cover 40 is fixed to the main body cover 41 having a cross-sectional shape that is smoothly curved in accordance with the shape of the front wheel support portion 20 and the like, and to both sides of the main body cover 41. The plate-shaped side plate 42 and the like are provided. By fixing the side plate 42 to both sides of the curved body cover 41 and forming the protective cover 40 in a box shape, the rigidity of the protective cover 40 can be secured and the appearance of the riding type mower can be seen from the front. It is configured to improve.

  A pair of left and right mounting brackets 43 are fixed to the center of the end of the main body cover 41 on the hinge 45 side, and mounting holes 43 a are machined in the mounting brackets 43. A mounting plate 44 is fixed to the upper surface side of the front wheel support portion 20, and a hinge 45 is mounted across the mounting bracket 43 and the mounting plate 44. The hinge 45 is fixed to the mounting plate 44 by two mounting bolts 46, and is mounted to the mounting bracket 43 by a mounting pin 47 so as to be rotatable about the left and right axis P1.

  The mounting pin 47 is fastened and fixed from the outside by a nut 49 with the disc spring 48 sandwiched between the mounting bracket 43. When the protective cover 40 is opened and closed with a certain force, the protective cover 40 is rotated around the axis P1. The hinge 45 can be applied with a certain holding force so that the opening / closing position of the protection cover 40 is held at the position where the hand is released when the protection cover 40 is opened and closed and released. It is configured. As described above, the open / close position of the protective cover 40 is held by the disc spring 48. In a daily maintenance operation or the like, if a lock tool (not shown) such as a stay is provided, it takes time and effort to operate the lock tool. This is because the workability may be deteriorated due to the load.

  In addition, in the protective cover 40 of this riding type mower, the structure which hold | maintains the protective cover 40 in the open state by the disc spring 48 is employ | adopted, However, For example, it covers over the protective cover 40 and the front-wheel support part 20. You may comprise so that holding | maintenance tools (not shown), such as a stay, may be provided and it may hold | maintain in the state which opened the protective cover 40 manually or automatically. With this configuration, the protective cover 40 can be securely held in an opened state, and the protective cover 40 is accidentally closed, for example, during maintenance work or transportation of the riding mower. Can be prevented.

  A rod 50 is fixed to the end of the main body cover 41 opposite to the hinge 45 over the entire width of the left and right sides, ensuring the strength of the front end of the main body cover 41 and the fingertip when opening the protective cover 40. Is configured to be able to be opened and closed by being hooked on the rod 50, so that operability can be improved.

  A stopper plate 51 is fixed inside the central portion of the rod 50 so as to slightly protrude from the side plate 42 in a side view, and the stopper plate 51 constitutes the front wheel support portion 20 with the protective cover 40 closed. By contacting the front surface of the plate 38, the position of the protective cover 40 in the most closed state is regulated. On the other hand, the end of the main body cover 41 on the hinge 45 side contacts the rear surface side of the hinge 45, so that the position of the protective cover 40 in the most opened state is restricted.

  A rod 52 bent in an L shape is fixed to the central portion of the main body cover 41, and this rod 52 is engaged with a support member 53 screwed to the upper surface side of the front wheel support portion 20. The protective cover 40 can be held in a closed state. The rod 52 is also configured to function as a reinforcing material, and when the protective cover 40 is strongly opened or closed, or when the protective cover 40 is stepped on with a foot from above with the protective cover 40 closed. The protective cover 40 is also configured so as not to be dented.

  As shown in FIG. 5, a seal 54 on which an operation description of the jack 30 is described is attached to the inner surface side of the protective cover 40, and when the jack 30 is operated with the protective cover 40 opened, The expansion and contraction operation of the jack 30 and the like can be performed smoothly, and in a state where the protective cover 40 is closed, the seal 54 can be prevented from being peeled off by being configured not to be exposed to rainwater or the like.

  By configuring the protective cover 40 as described above, from the state in which the protective cover 40 is closed, the fingertip is inserted into the gap between the rod 50 and the plate 38 at the lower end of the protective cover 40 and the protective cover 40 is lifted upward. Then, the engagement between the rod 52 and the support member 53 is released, and the protective cover 40 swings upward around the axis P <b> 1 of the hinge 45. When the opening and closing of the protective cover 40 is stopped and the hand is released, the opening and closing position of the protective cover 40 is held at the position where the hand is released by the holding force of the hinge 45, and when the protective cover 45 is kept open, the hinge cover 45 side of the main body cover 41 Are in contact with the rear surface side of the hinge 45, and the protective cover 40 is in the most open state.

  On the other hand, when the upper surface side of the main body cover 41 is manually pressed from the rear side when the protective cover 40 is in the most open state, the protective cover 40 swings downward around the axis P1 of the hinge 45, and the stopper plate 51 is moved to the plate. 38, the rod 52 engages with the support member 53, and the protective cover 40 is held in a closed state.

  As shown in FIG. 5, with the protective cover 40 closed, the front wheel support portion 20 that supports the front wheel support frame 29 and the tip and the like of the expansion / contraction handle 36 of the jack 30 can be covered from above. A protective cover 40 is set. Therefore, the connecting shaft 31 and the holder 37 can be covered with the protective cover 40 with the protective cover 40 closed, and the connecting shaft 31 and the holder 37 can be prevented from being rusted by rainwater or the like.

  In addition, when the protective cover 40 is closed, the distal end portion of the expansion / contraction handle 36 of the jack 30 is covered with the protective cover 40, so that an erroneous operation of the jack 30 can be prevented. Furthermore, by covering from the front with the protective cover 40, rainwater or the like entering from the front by running the riding mower is less likely to be applied to the rod portion 30a of the jack 30, the connecting pin 34, the bracket 33, or the like. Therefore, it can prevent that the rod part 30a of the jack 30, the connection pin 34, the bracket 33, etc. rust.

  As shown in FIG. 4, the protective cover 40 in a state in which the protective cover 40 is opened (FIG. 4 shows a state in which the protective cover 30 is most opened and an example in which the protective cover 40 is opened). The front end is configured so as to be positioned rearwardly far beyond the front end of the front wheel support portion 20 (L in FIG. 4). Therefore, the protective cover 40 does not easily interfere with the maintenance work, and the workability of the expansion / contraction operation of the jack 30 performed by opening the protective cover 40 and the maintenance work in the vicinity of the front wheel support portion 20 can be improved.

[Mounting structure of grass collector]
The detail of the attachment structure of the grass collector 22 is shown in FIGS. As shown in FIGS. 7 to 9, rear-side stays 60 are fixed to the rear surfaces of the left and right vertical frames 9 b constituting the fall protection frame 9, and are located at the rear end of the body frame 15. A rearward lower stay 61 is fixed to both sides of 19.

  The left and right connecting frames 62 formed by bending a pipe material are fixed to the grass collector 22, and connecting portions 62 a and 62 b in which lateral connecting holes are machined are formed at the front end and the lower end of the connecting frame 62. Each is fixed. With the connection frame 62 fixed to the grass collector 22, the attachment portions 62 a and 62 b of the connection frame 62 are attached to the stay 60 fixed to the fall protection frame 9 and the lower stay 61 fixed to the rear lateral frame 19 from the rear. Thus, the grass collector 22 is configured to be connected to the riding mower.

  A connection fitting 65 is fixed to the outer surface side of the connection portion 62 a of the connection frame 62. The connecting metal fitting 65 includes a rod 65a bent in an L shape, a spring 65c built in the case 65b, and the like. The rod 65a is pushed from the outside against the urging force of the spring 65c to push the rod 65a. When the rod is rotated, the tip of the rod 65a protrudes inside the connecting portion 62a through the connecting hole of the stay 60, and the rod 65a can be held with the tip of the rod 65a protruding. When the rod 65a is rotated from the state in which the stay 65 and the connecting portion 62a are connected by operating the rod 65a of the connecting fitting 65, the rod 65a is pushed outward by the biasing force of the spring 65c, and the stay 60 and the connecting portion are connected. The connection of 62a is configured to be released.

  On the other hand, a connecting portion 62 b fixed to the lower end portion of the connecting frame 62 is rotatably connected to the lower stay 61 fixed to the rear horizontal frame 19 via a pin 66. In this way, the stay 60 and the lower stay 61 are directly attached to the traveling machine body 3 side (the fall protection frame 9 and the rear lateral frame 19), and the grass collector 22 is configured to be detachable. Compared with the case where the stay etc. (not shown) is extended from the end and the grass collector 22 is configured to be detachable, the structure of the stay 60, the lower stay 61, etc. can be simplified and the manufacturing cost can be reduced. be able to.

  With the connecting frame 62 attached to the grass collector 22, the connecting portions 62a and 62b of the connecting frame 62 are attached to the stay 60 and the lower stay 61 from the rear, and the pin 66 is interposed between the lower stay 61 and the connecting portion 62b. It is configured so that the grass collector 22 can be easily and quickly mounted on the riding-type grass mower by being inserted and fixed in place and locking the connecting fitting 65. Moreover, since it is comprised so that rocking | fluctuation back and forth of the grass collector 22 is carried out by making the position of the pin 66 into a fulcrum, the lock | rock of the connection metal fitting 65 is cancelled | released in the state which inserted the pin 66, and the grass collector 22 is tilted back. Thus, the bonnet 70 located below the grass collector 22 and the connecting frame 62 can be opened and closed, and the maintenance of the engine 5 and the like can be performed easily and quickly.

[Detailed structure near the bonnet]
10 to 14 show detailed views around the bonnet 70. FIG. 10 shows a longitudinal side view of the vicinity of the bonnet 70, and FIG. 11 shows a cross-sectional plan view of the vicinity of the bonnet 70. 12 shows a vertical side view of the lower portion of the radiator 72, and FIGS. 13 and 14 show a vertical side view and a plan view of the upper portion of the bonnet 70, respectively.

  As shown in FIGS. 10 and 11, a radiator 72 is provided on the front side of the engine 5, and a cooling fan 73 that is rotated by the power of the engine 5 is provided behind the radiator 72, so that the cooling sucked from the front of the radiator 72. By supplying wind toward the engine 5, the radiator 72 and the engine 5 can be cooled. On the front side of the radiator 72, an oil cooler 74 formed in a meandering pipe shape is fixed to the radiator 72 via a bracket 75, so that hydraulic oil used for a hydrostatic continuously variable transmission or the like can be cooled. It is configured as follows.

  The engine 5, the radiator 72, the oil cooler 74, etc. are covered from above with a bonnet 70 that can swing up and down around the axis P <b> 2 at the rear end of the traveling machine body 3, and a handle 76 provided at the top of the bonnet 70. The engine 5 and the radiator 72 and the like can be maintained by opening and closing the bonnet 70 while holding the handle.

  The bonnet 70 is configured by mounting a resin cover 70b on the front portion of a bonnet body 70a made of sheet metal, and a punching metal 70c is fixed to the rear surface side of the bonnet body 70a, and the front surface of the resin cover 70b. The mesh material 70d with good air permeability is attached to both the left and right side surfaces and the upper surface, so that warm air inside the hood 70 can be discharged out of the hood 70 and cold air outside the hood 70 can be taken into the hood 70. ing.

  A sealing material 77 is fitted and attached to the outer periphery of the bonnet 70 at the front lower portion. The bonnet 70 is closed and the sealing material 77 is brought into close contact with a resin cover 80 to be described later. It is comprised so that the sealing performance of can be ensured.

  Brackets 78 extend inward from the left and right vertical frames 9 b constituting the fall protection frame 9, and a radiator 72 is fixed to the bracket 78. Further, a bracket 79 extends forward from the left and right vertical frames 9 b constituting the fall protection frame 9, and a plate 57 is fixed to the upper surface side of the bracket 79.

  On the upper surface side of the plate 57, the resin cover 80 is covered by a plurality of bolts 81 and a bolt 58 with a handle so that the front and left and right gaps of the radiator 72 in front of the lower part of the bonnet 70 can be covered from above. 57 is fixed. The resin cover 80 is formed with a notch 80a for attaching the radiator 72 and piping to the oil cooler 74 so that the radiator 72 and the oil cooler 74 can be attached with the resin cover 80 attached. It is configured.

  The resin cover 80 is made of an elastic heat-resistant resin plate. When the bonnet 70 is closed and the sealing material 77 is brought into close contact with the resin cover 80, the resin cover 80 is slightly elastically deformed and the bonnet 70 and the resin cover. It is comprised so that the sealing performance between 80 can be improved.

  As shown in FIG. 12, two handles located at the front of the resin cover 80 with the bonnet 70 opened and the four bolts 81 located at the rear and front and rear central portions of the resin cover 80 attached. When the bolt 58 with the handle is loosened and the bolt 58 with the handle is lifted upward, the resin cover 80 is deformed into a curved shape due to the elasticity of the resin cover 80 as shown by a two-dot chain line in FIG. Then, without removing the bolt 81 for fixing the resin cover 80, maintenance of the universal joint 12 and the like located below the resin cover 80 from the gap between the elastically deformed resin cover 80 and the rear axle case 13 and the lower part of the resin cover 80 are performed. Can be cleaned.

  By configuring the resin cover 80 in this way, not only can the grass cutting and the like enter the bonnet 70 from below, but a sealing property between the bonnet 70 and the resin cover 80 can be secured, and the resin cover 80 can be positioned below the resin cover 80. It is possible to improve the workability of the equipment to be performed and the cleaning work under the resin cover 80.

  As shown in FIGS. 13 and 14, a waterproof cover 83 made of resin is fastened to the mesh material 70d and the cover 70b on the inner surface side of the mesh material 70d attached to the lower surface of the cover 70b constituting the bonnet 70. It is fixed. The waterproof cover 83 is disposed so as to be positioned immediately above the cap 72a of the radiator 72, and is formed into a shape in which front and left and right side ends are bent downward.

  Thus, by providing the waterproof cover 83, for example, in the case where the seal or the like (not shown) of the cap 72a of the radiator 72 is damaged due to overheating of the engine 5, the water spouted from the radiator 72 Is prevented from being sprayed out of the hood 70 by the waterproof cover 83, and water can be prevented from being scattered to the driver's seat 6 or the like located in front of the hood 70. Further, by forming the waterproof cover 83 in a shape in which the front and left and right end portions of the waterproof cover 83 are bent downward, it becomes difficult for water sprayed from the radiator 72 to be scattered on the driver's seat 6 and the like. The area for closing the ventilation holes of the mesh material 70d can be minimized.

[Detailed structure of rear end of body frame]
FIG. 15 shows a detailed structure of the rear end portion of the body frame 15. FIG. 15 (a) shows a side view of the rear end portion of the body frame 15, FIG. 15 (b) shows a longitudinal rear view of the rear end portion of the body frame 15, and FIG. The longitudinal side view of an edge part is shown.

  As shown in FIG. 15, a weight support member 85 is attached to the rear end portion of the body frame 15 of the riding mower. The weight support member 85 includes a first support member 86 provided across the left and right rear frames 17 in the form of a vertical plate, and a first support member 86 provided across the lower surface side of the first support member 86 and the rear lateral frame 19. 2 support members 87.

  The first support member 86 is bent into a U-shaped cross section when viewed from the back, and is firmly fixed to the rear frame 17 in contact with the inner surfaces of the left and right rear frames 17. . On the other hand, the second support member 87 is formed by bending a flat plate in a side view, the front end portion is firmly fixed to the lower surface side of the first support member 86, and the rear end portion is the rear horizontal frame. It is firmly fixed to 19.

  The shape of the first support member 86 is set so that the weight 88 can be inserted from the front, and weight attachment holes 86a are machined on the left and right sides. As shown in FIG. 15 (a), the weight 88 is placed on the upper surface side of the first support member 86 from the front of the first support member 86, and is fastened and fixed to the weight mounting hole 86a with a bolt 89. The support member 85 can be stably supported. The weight 88 is for adjusting the weight balance between the front and rear of the riding type mower. For example, in a riding type mower having different specifications of the engine 5 and the same frame structure, the weight 88 is attached to and removed from the riding type mower. The axle load applied to the front and rear axles of the mower can be adjusted, and the running performance and the like can be easily changed and adjusted.

  The shape of the second support member 87 is formed into a shape that is curved obliquely rearward in a side view in order to secure a departure angle of the riding mower and improve its appearance, and the front and rear central portions of the second support member 87 Hitch mounting holes 87a are machined on both the left and right side portions. As shown by a two-dot chain line in FIG. 15C, the tow hitch 90 is attached from the lower side of the second support member 87, and is fastened and fixed to the hitch attachment hole 87a with a bolt 91 so that the hitch 90 is a weight support member. It is comprised so that it can fix to 85. By attaching the hitch 90 and running the riding mower, for example, it is possible to tow a broken vehicle or the like.

  In this way, by fixing the weight support member 85 to the rear portion of the vehicle body frame 15 so that the weight 88 and the hitch 90 can be attached, a structure for attaching the weight 88 and the hitch 90 can be simply realized. Manufacturing costs can be reduced. The weight support member 85 is configured in a position and shape that also functions as a rear bumper of the riding mower. For example, even if the riding mower is moved backward and comes into contact with an obstacle, the body frame The rear part of 15 is configured not to be greatly damaged.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the example in which the protective cover 40 is provided so as to cover the front and upper portions of the front wheel support portion 20 has been shown. The present invention can be similarly applied to a riding-type mower that does not include the jack 30. For example, the protective cover 40 is attached so as to cover the front and upper sides of the front wheel support frame 29 and the protective cover 40 is opened. The protective cover 40 may be configured such that the front end of the front wheel is positioned rearward beyond the front end of the front wheel support frame 29.

[ Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] and [ First Alternative Embodiment], an example in which the protective cover 40 includes the main body cover 40 and the side plate 41 is shown. As long as the function is fulfilled, the protective cover 40 having a different shape and size may be adopted, and the structure for swinging the protective cover 40 may be different.

Overall left side view of riding mower Overall plan view of a riding mower Plan view showing the detailed structure of the jack Vertical side view showing the structure of the protective cover Front view around the protective cover with the protective cover open Front view showing expansion and contraction of jack Side view showing the mounting structure of the dust collector Plan view showing the mounting structure of the grass collector Cross-sectional plan view showing the mounting structure on the fall protection frame side of the dust collector Vertical side view showing the internal structure of the bonnet Cross-sectional plan view showing the internal structure of the bonnet Vertical side view showing the opening and closing structure of the resin cover Vertical side view showing structure of waterproof cover Plan view showing structure of waterproof cover Detailed view showing structure of weight support member

Explanation of symbols

1 front wheel 2 rear wheel 3 traveling aircraft
8 deck panel 20 front wheel support
29 Front wheel support frame 40 Protective cover M Moore P1 shaft center

Claims (1)

A mower is connected between the front wheels and the rear wheels of the traveling machine body, and a front wheel support frame that supports the front wheels of the traveling machine body is swung about a front and rear axial center between a traveling posture and a maintenance posture on a front wheel support portion that faces left and right. capable equipped, provided with a protective cover for covering the front and upper side of the front-wheel support portion in the front-wheel support portion, oscillating the protective cover, the lateral direction of the pivot axis about which is positioned above the front-wheel support portion Configure as possible
In the open state in which the protective cover is opened upward, the position of the pivot axis of the protective cover is set so that the front end of the protective cover in the open state is located behind the rear end of the front wheel support frame . A mower disposed behind the front end of the front wheel support frame at a position higher than the floor of the front end of the deck panel .

Images