JP2012249537A - Riding lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a connection structure of a cylinder mechanism for dumping with a collector and the periphery.SOLUTION: In the riding lawn mower, supporting frames 46 and 46 are erected at the back of a vehicle body, and an upper and lower pair of lifting links 60 and 62 are arranged right and left respectively of a collector 40 at these supporting frames 46 and 46, and vertical links 63 and 63 are connected with each of ends of right and left lifting links 60 and 62, a connection frame 67 which connects these right and left vertical links 63 and 63 is prepared, a collector 40 is prepared to be fixed at a dumping turn supporting point shaft 66 and 66 of the vertical links 63 and 63, a dumping cylinder mechanism 72 is prepared between the connection frame 67 and a floor part reinforcement frame 40b of the collector 40 in an expansionable and contractionable manner, and the dumping cylinder mechanism 72 is along a floor part of the collector 40 even in a shortening condition or a condition in which a piston part extends.

Description

  The present invention relates to a riding lawn mower, and more particularly to a mounting structure for a mower collector that collects and discharges dumps to a certain place every time the turf grass cut and transported from a mower deck is accommodated.

  A support frame connected to the rear part of the traveling vehicle body, a collector mounted on the support frame so as to be movable up and down, a lift cylinder mechanism for moving the collector up and down relative to the support frame, and a dump cylinder for dumping the collector to a cut grass discharging posture There exists a form which provides (patent document 1).

  When the dump cylinder mechanism is positioned on the laterally outer side of the collector as in Patent Document 1, the dump cylinder mechanism swings on the lateral side when the number of installed dump cylinder mechanisms is either left or right. As a result, the collector may be twisted. Therefore, a support cylinder connected to the rear part of the traveling vehicle body, and a dump cylinder mechanism for switching the collector supported by the support frame so as to be swingable on the lateral axis between a grass collecting posture and a discharge posture are arranged on the left and right sides below the collector. There is a configuration in which a single unit is provided in between (Patent Document 2).

JP 2004-305156 A JP 2008-287882 A

  The dump cylinder mechanism (discharge cylinder) in Patent Document 2 is disposed at an intermediate portion of a connecting frame that connects the upper and lower link mechanisms to the left and right. Since the mechanism is such that the cylinder portion extends and the collector rotates while maintaining the posture substantially unchanged, the dump cylinder mechanism is separated from the bottom of the collector, that is, the dump cylinder mechanism is exposed. For this reason, there is a risk that foreign matter will collide or adhere to the extended piston portion. In addition, when connecting the hydraulic piping to the cylinder portion, an unexpected contact or the like is likely to occur due to the approaching and leaving of the collector.

  The present invention intends to eliminate the above-mentioned drawbacks while simplifying the connection configuration between the dump cylinder mechanism and the collector and the surrounding configuration.

  The invention according to claim 1 includes front wheel 2 steering wheel and rear wheel 3 drive wheel, and a mower 15 is provided at the lower part of the vehicle body so as to be movable up and down, and the cut grass is attached to the rear part of the vehicle body via the shooter 37. In the riding lawn mower configured to be collected by the collector 40, support frames 46 and 46 are erected at the rear of the vehicle body, and a pair of upper and lower lift links 60 and 62 are provided on the left and right of the collector 40 on the support frames 46 and 46. The vertical links 63, 63 are connected to the ends of the left and right lifting links 60, 62, respectively, and a connecting frame 67 is provided to connect the left and right vertical links 63, 63. The collector 40 is fixed to the moving fulcrum shafts 66, 66, and the dump cylinder mechanism 72 is provided between the connection frame 67 and the floor reinforcing frame 40b of the collector 40 so as to be extendable and contractable. The riding lawn mower, characterized in that the.

  If comprised in this way, the piston side end part 72a which is one end side of the dumping cylinder mechanism 72 will be connected with the connection frame 67, and the other end of the dumping cylinder mechanism 72 will be connected with the floor part reinforcement frame 40b of the collector 40. Therefore, in the shortened state of the dump cylinder mechanism 72, it becomes a state along the floor portion of the collector 40, and even if the piston portion of the dump cylinder mechanism 72 is extended, it also follows the floor portion of the collector 40.

  The invention according to claim 2 is provided with a pair of first pipes 87, 87 and second pipes 88, 88, of which the first pipes 87, 87 are connected to the lift cylinders 69a, 69a, and the second pipes are provided. 88 and 88 are connected to the dump cylinder mechanism 72, and the second pipe 88 is held along one of the upper and lower links 60 and 62, and is further held by the connecting frame 67 to be connected to the dump cylinder mechanism 72. The riding lawn mower according to claim 1.

In particular, the second pipe 88 follows in a state of little bending or the like in the turning operation around the turning fulcrum shaft 66 of the collector 40.
According to the third aspect of the present invention, the piston side end portion 72a, which is one end side of the dump cylinder mechanism 72, is connected to the left and right intermediate portion of the connecting frame 67, and the other end is connected to the left and right intermediate portion of the floor reinforcing frame 40b of the collector 40. It is set as the riding lawn mower as described in any one of Claim 1 or Claim 2 formed by connecting to a part.

The dump cylinder mechanism 72 can be connected to each of the left and right intermediate portions of the connecting frame 67 and the floor reinforcing frame 40b to form a single unit.
The invention according to claim 4 is the riding lawnmower according to claim 3, wherein the bottom plate 85 of the collector 40 is formed with a mountain height 85a at the left and right intermediate portions, and a dump cylinder mechanism 72 is disposed below the mountain height 85a portion. The configuration is as follows. By configuring in this way, the entire cylinder mechanism 72 and the piping 88 described later can be configured without protruding downward from the lower surface of the container 40. The appearance is simple and damage due to collision can be reduced.

  According to the first aspect of the present invention, the dump cylinder mechanism 72 is expanded and contracted so as to always follow the lower surface of the floor portion of the collector 40, and the dump cylinder mechanism 72 is covered and hidden by the lower surface of the collector 40. Thus, as in the prior art, the extended piston part is exposed to eliminate the possibility of collision with other objects and foreign matter adhesion.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the relationship between the lift links 60 and 62, the vertical link 63, and the connecting frame 67 is fixed, and in this state, the dump cylinder mechanism 72 is The collector 40 is extended and rotated around the rotation fulcrum shaft 66, but it is sufficient to secure a pipe length corresponding to the extension amount of the piston portion of the cylinder mechanism 72, and the connection frame 67 of the dump cylinder mechanism 72 is sufficient. Since it becomes the rotation center, the second pipe 88 is less twisted and there is no fear of breakage.

  According to the third aspect of the present invention, in addition to the effects of the first and second aspects, the dump cylinder mechanism 72 is connected to the left and right intermediate portions of the connecting frame 67 and the floor portion reinforcing frame 40b, so that the collector 40 Can be configured as a single unit while preventing twisting, and cost can be reduced.

  According to the invention described in claim 4, in addition to the effect described in claim 3, the entire cylinder mechanism 72 and the pipe 88 described later can be configured without projecting downward from the lower surface of the container 40. Etc. can also be reduced.

1 is an overall side view of a riding lawn mower. It is an enlarged side view of a riding lawn mower. It is an operation explanatory view. It is an expansion perspective view of the principal part. It is the expansion perspective view (A) of the principal part, and the one part front sectional view (B). It is a piping schematic diagram. It is a whole side view at the time of collector removal. It is an enlarged side view of a raising / lowering cylinder mounting part. It is a whole side view at the time of collector removal. It is a side view of a carrier. It is a front view of a carrier. It is a perspective view of a collector floor part. It is a side view of the cylinder mechanism peripheral part of another example. They are a perspective view (A) and a partial side view (B) of the peripheral part of the cylinder mechanism for dumping of another example. It is a side view of the hydraulic cylinder mechanism for raising / lowering of another example. It is the plane sectional view (A) of the raising / lowering link of another example, and a partial sectional side view (B). It is the side view (A) of the attachment / detachment structure of the raising / lowering link of another example, and the top view (B). It is a perspective view which shows the attachment / detachment structure of the raising / lowering link of another example.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall side view of a riding lawn mower, and FIG. 2 is an overall plan view.
The riding lawn mower 1 includes front wheels 2 and 2 and rear wheels 3 and 3 on the front and rear of a vehicle body, and further supports an engine 5 mounted on a hood 4 at the front of the vehicle body.

  The rotational power of the engine 5 is appropriately decelerated via a transmission comprising a hydraulic continuously variable transmission 7 or the like, and the reduced rotational power is supplied to chains and sprockets provided in the left and right chain cases 8 and 8. The vehicle is driven by being transmitted to the rear wheels 3 and 3 by the transmission member.

  The vehicle body is moved forward and backward by a forward / reverse operation pedal 11 provided at the right front portion of the floor 10, and the steering is steered by rotating the steering handle 13 at the front portion of the seat 12.

  A mower 15 for cutting grass and turf is attached to the lower part of the vehicle body between the front wheels 2 and 2 and the rear wheels 3 and 3 by a link mechanism 16 so as to be movable up and down. The link mechanism 16 includes a pair of front and rear link pieces 16a and 16b that are paired on the left and right to form a parallel link, and can move the mower 15 up and down in a state of being substantially parallel to the ground.

The mower 15 is moved up and down by a hydraulic cylinder (not shown). The raising / lowering operation is performed by the lever 17.
Next, the detailed structure of the mower 15 will be described.
When viewed from above, the entire mower deck 18 constituting the casing of the mower 15 has a shape in which circular housings 18a and 18b are arranged side by side, and the rotating shafts 19L and 19R are rotated by the housings 18a and 18b. While supporting freely, it is comprised so that the circumference | surroundings of the braid | blade (cutting blade) 20L, 20R fixed to rotating shaft 19L, 19R may be covered with the upper surface and outer periphery of housing 18a, 18b.

  Grass discharge passages 23 and 23 are formed on the outer circumferences of the upper surfaces of the individual housings 18a and 18b. The grass discharge passages 23 and 23 gradually rise along the rotation direction so as to discharge the cut grass cut by the rotating blades 20L and 20R. Form a grass discharge passage 24 that merges at the center in the left-right direction and is open at the rear.

  In this embodiment, the right blade 20R rotates counterclockwise as viewed from above, the left blade 20L rotates clockwise, and the two blades 20R and 20L are out of phase by about 90 degrees. It is designed to rotate at. Transmission of power to the two blades 20R and 20L is performed as follows. A pulley 26 is fixedly provided on the first output shaft 25 at the front part of the engine 5, and a belt 28 is wound around the pulley 26 and a pulley 27 provided at the front lower part of the vehicle body so as to rotate integrally with the pulley 27. (2) A universal joint shaft 32 is connected between the output shaft 29 and the input shaft 30 on the mower 15 side, and a pulley 33 is provided on the input shaft 30 to support the transmission of the rotating shaft 19L on one side (left side in the illustrated example). The bevel gear mechanism is configured to transmit power through a belt 35 to a gear box 34 having a bevel gear mechanism. The shaft is transmitted toward a gear box 36 having a bevel gear mechanism for transmitting and supporting the rotating shaft 19R on the other side (right side in the example). The blades 20L and 20R are configured to be rotationally driven in opposite directions.

  The cut grass cut by the two blades 20L and 20R is discharged rearward through the grass discharge passage 24. A shooter 37 having a rectangular tube cross section is connected to the grass discharge passage 24, and the rear end of the shooter 37 communicates with a front opening 40 a of a collector 40 described later. The shooter 37 is fastened and fixed to the vehicle body by bolts or the like in advance at the lower part of the body of the vehicle body, and the cross section thereof has a cross-sectional area substantially equal to the interval formed by the left and right chain cases 8, 8 It is cut into a shape.

  Then, a cover 39 having an inverted U-shaped cross section attached to the upper part of the grass discharge passage 24 on the mower 15 side with respect to the inlet of the shooter 37 is inserted from the front, and the cover 39 follows when the mower 15 moves up and down. It is configured to rotate up and down. Although not shown, the cover 39 is always urged upward about the front fulcrum, so that the rear upper end of the cover is always in contact with the ceiling of the shooter 37.

  Further, two support plates 44, 44 formed by cutting the middle portion into a vertically long trapezoidal shape are fixed to the rear end portions of the vehicle body frames 42, 42 along the front-rear direction, and the collector 40 is attached to the support plates 44, 44. Mast-like support frames 46 and 46 that are rotatably supported are fixed.

  Of the pair of left and right connecting bodies 50, 50 in which the channel members 48, 49 are integrated back to back on the support frames 46, 46, the front channel members 48, 48 are overlapped from the rear side at two locations. The pins 51 and 51 are detachably connected. On the other hand, two upper and lower lift links 60, 60, 62, 62 are pivotally attached to the left and right pairs on two rotation fulcrums 58, 58, 59, 59 provided on the rear channel members 49, 49.

  The rear portions of the two lift links 60 and 62 are bent downward, and a vertical link 63 is attached to the rear ends of the two lift links 60 and 62 as viewed from the side. More specifically, the vertical link 63 holds a pair of plate members 63a, 63a with a collar (not shown) between them to maintain a distance, and pivotally supports the tips of the two upper and lower lift links 60, 62 so as to rotate. 65 is constituted.

  In addition, a fulcrum shaft 66 serving as a dump rotation fulcrum S is formed in the middle portion of the vertical link 63. That is, the inner end portion of the shaft 66 that passes through the protruding portions 63b and 63b at the center of the plate members 63a and 63a is fixed to the side surface column support 40a of the collector 40. The dump rotation fulcrum shaft 66 and the side surface support column 40a of the collector 40 are configured to be relatively rotatable, and the left and right dump rotation fulcrum shafts 66 are provided symmetrically so that the collector 40 can be viewed from the left and right sides. It is the structure which can be rotated around the common dump fulcrum S.

  Further, the vertical links 63, 63 configured on the left side and the right side of the collector 40 are connected to each other on the left and right sides of the collector 40 by connecting the vertical links 63, 63 with a cylindrical connection frame 67. At the intermediate portion, the piston side end portion 72a of the dump cylinder mechanism 72 is connected via brackets 67a and 67a. Further, the other end of the dump cylinder mechanism 72 is connected to the left and right intermediate portion of the floor reinforcing frame 40b as a frame constituent member of the collector 40. Accordingly, the single dump cylinder mechanism 72 performs a dumping operation and a returning operation of the collector 40.

  The distance between the lower pivot fulcrums 64 and 65 is shorter than the distance between the upper pivot fulcrums 58 and 59 on the front side of the elevating links 60 and 62, and the distance between the fulcrums 58 and 64 of the upper link 60 is shorter. The distance between the fulcrums 59 and 65 of the lower link 62 is shorter. For this reason, the rear part of the collector 40 is inclined higher than the front part during operation, and the front side of the collector 40 is inclined higher than the rear side when the elevating links 60 and 62 are raised.

  The lower link 62 is provided with a lock bracket 52, and the pin hole 52a of the lock bracket 52 is aligned with a pin hole 49a formed on one side of the rear channel member 49 of the coupling body 50 at the highest position. The links 58 and 59 can be locked and held in the raised position by being connected with each other (not shown).

  A hydraulic cylinder mechanism 69 for raising and lowering is attached between the lower part of the mast-like support frames 46 and 46 and the lower links 62 and 62, and if the operating oil is guided into the hydraulic cylinder 69c by operating the raising and lowering operating lever 17, the collector 40 is raised, and conversely, when the lifting operation lever 17 is operated to the lower side, the hydraulic oil in the hydraulic cylinder 69c is discharged to the tank side, and the collector 40 is lowered. The lifting hydraulic cylinder mechanisms 69 are arranged on the left and right, respectively.

  A configuration for connecting the base of the hydraulic cylinder 69c of the lifting hydraulic cylinder mechanism 69 to the support frame 46 will be described. As shown in FIGS. 7 and 8, the hydraulic cylinder is provided by a pivot pin 55 that is provided by horizontally extending a pair of cylinder brackets 54, 54 that are superposed on a support frame 46 and are detachably connected by lateral pins 53, 53. The base of 69c is supported. In addition, between the cylinder brackets 54 and 54 and the pivot pin 55, the adjustment bodies 56 and 56 which can finely adjust the vertical position of the pivot pin with respect to the cylinder brackets 54 and 54 are configured, respectively.

  Specifically, a disk 56a that directly supports the pivot pin 55 and is fitted to the large-diameter hole 54b of the bracket member 54a so as to be rotatable about the horizontal axis, and a fan-shaped plate integrally provided on the disk 56a. 56b, the arc-shaped hole 56c of the fan-shaped plate 56, and the fan-shaped plate 56b are integrated with the bracket member 54a by tightening the bolt 57 via the arc-shaped hole 56c so that the pivot pin 55 can be adjusted and locked. Yes. Accordingly, by loosening the bolt 57 and rotating the fan-shaped plate 56 (the rotation center P at this time is the center of the disk 56a), fine adjustment is made according to the arc drawn by the deviation amount ε from the center P. be able to.

  In FIG. 1, the state of the dotted line is the cutting work posture, and the state of the solid line is the discharging posture at the time of ascent. In the working posture, the rear portion of the collector 40 is supported in the upright state, so there is no fear that the rear portion of the collector 40 abuts on the ground, and it is possible to eliminate the problem that the collector 40 hits the ground and deforms when working on an inclined ground. .

  On the contrary, when hydraulic oil is supplied into the hydraulic cylinder 69c and the collector 40 is raised, it seems that the collector 40 is lifted forward, so that the problem of grass spilling from the opening 40a provided on the front surface of the collector 40 can be eliminated. .

  When the dump lever 72L provided at the rear part of the lift lever 17 is operated and the hydraulic cylinder mechanism 72 for dumping is extended, the collector 40 is rotated clockwise around the dump pivot point 66 (S).

  The piston-side end portion 72a of the dump cylinder mechanism 72 is connected to the intermediate portion of the connecting frame 67 via brackets 67a and 67a. The other end of the dump cylinder mechanism 72 is connected to a floor reinforcing frame 40b as a frame component of the collector 40.

  As described above, the piston side end 72a, which is one end side of the dump cylinder mechanism 72, is connected to the left and right intermediate part of the connection frame 67, and the other end of the dump cylinder mechanism 72 is connected to the floor reinforcement frame 40b of the collector 40. Since the dump cylinder mechanism 72 is in a shortened state, it is in a state along the floor of the collector 40, and even if the piston portion of the dump cylinder mechanism 72 is extended, the collector is similarly connected. 40, in other words, the dumping cylinder mechanism 72 extends and contracts along the bottom surface of the collector 40 at all times. Therefore, the dumping cylinder mechanism is covered and hidden by the lower surface of the collector 40, and the piston portion that is particularly extended is exposed as in the prior art, and does not cause collision with other objects or adhesion of foreign matter.

  The high dump collector 40 has a large opening on the upper surface and the rear surface, and discharges the stored grass from the opening. Normally, the upper surface and the back surface are covered with a resin cover member 76, and grass does not fall down from the upper opening 77 and the rear opening 78. In the resin cover 76, the upper horizontal portion 76a and the rear vertical portion 76b may be integrated, or may be divided into two parts in the front and rear.

  The cover member 76 is detachably attached to a cover frame 80 bent in an inverted L shape when viewed from the side, and the front portion of the cover frame 80 is an upper front portion of the frame member 81 that forms the framework of the collector 40. It is pivotally supported by a pin 82. In addition, a curved link 83 whose middle portion is curved upward is pivoted between the upper ends of the vertical links 63 and 63 and the cover frame 80, and interlocks with the extension operation of the hydraulic cylinder mechanism 72 for dumping. Thus, the curved link 83 stands up with respect to the collector 40, and the cover member 76 rotates upward about the pin 82 to open the upper opening 77 and the rear opening 78 of the collector 40 (FIG. 3). ).

  With such a configuration, the mowing grass accommodated in the collector 40 is discharged to the ground. As is apparent from FIG. 1, when the hydraulic cylinder mechanism 72 for dumping is shortened and the cover member 76 is closed and both covers are gathered in one place, the curved link 83 is covered by the cover, and from the outside. Is invisible. For this reason, the links for opening and closing the opening of the collector do not appear in the surface portion as in the conventional case, and the appearance does not deteriorate.

  In FIG. 5, the bottom plate 85 of the collector 40 is configured such that the left and right intermediate portions are formed in a mountain height portion 85a, and a dump cylinder mechanism 72 is disposed below the mountain height portion 85a. By configuring in this way, the entire cylinder mechanism 72 and the piping 88 described later can be configured without projecting downward from the lower surface of the container 40, the appearance can be simplified, and damage due to collision can be reduced. In addition, if the bottom plate 85 is formed so as to have a concavo-convex shape in the cross section and the central portion is formed in the peak portion 85a, the strength can be increased.

  Next, with respect to the hydraulic piping configuration for the raising / lowering cylinder 69a of the raising / lowering hydraulic cylinder mechanism 69 of the collector 40 and the dump cylinder 72a of the dumping cylinder mechanism 72, in FIG. A bracket 86 is provided, and the bracket 86 supports a pair of first pipes 87 and 87 and second pipes 88 and 88 through a main body side hydraulic valve (not shown) of the riding lawn mower. On the upper side of the pipe support bracket 86, couplers 87a, 87a, 88a, 88a are respectively provided for the respective pipes. Of these, the first pipes 87 and 87 are branched through T-shaped joint pipes 87b and 87b and connected to the lift cylinders 69a and 69a, respectively. On the other hand, the second pipes 88 and 88 are configured to be connected to the dump cylinder 72. After the T-shaped joint of the first pipes 87 and 87, the first pipes 87 and 87 are protected in a housed state inside a support and cover (not shown) provided in a connected state on the left and right of the middle part of the support frame 46. The support of the second pipe 88 to the dump cylinder 72 is held along one of the upper and lower links 60 and 62 from a state along one side of the support frame 46, and further held on the connecting frame 67. The connecting pipes 89 and 89 are configured to be protected by a U-shaped cover member (not shown) provided at the lower rear portion of the collector 40.

  Therefore, in particular, the second pipe 88 is less likely to be broken due to less bending or the like in the turning operation around the turning fulcrum shaft 66 of the collector 40. That is, the mutual relationship between the lifting links 60 and 62, the vertical link 63, and the connecting frame 67 is fixed, and in this state, the dump cylinder mechanism 72 extends and the collector 40 rotates about the rotation fulcrum shaft 66. It is only necessary to secure a pipe length corresponding to the extension amount of the piston portion of the cylinder mechanism 72. Since the connecting frame 67 serves as the rotation center of the cylinder mechanism 72 for dumping, the pipe 88 is less twisted and there is no fear of breakage. .

  Next, a procedure for removing the connected collector 40 will be described with respect to the attaching / detaching action of the collector 40. In the raised position, the collector 40 in the dump posture closes the cover member 76 by operating the collector raising / lowering lever 17 and the dump lever 72L, returns to the forward tilt posture, and descends. A carrier 92 is prepared in advance, and is arranged below the collector 40 in a lowered state. When the collector 40 main body is placed on the carrier 92, the lowering operation by the collector elevating lever 17 is stopped. Then, the couplers 87a, 87a, 88a, 88a of the pipe are disconnected. Thereafter, the cylinder bracket 54 on the lower side of the support frame 46 is removed by removing the lateral pin 53 and moved backward as it is (FIG. 7) or rotated around the pivot pin 55 for each cylinder bracket 54 (FIG. 8). The horizontal pin 53 is attached and held on the holding metal fitting 93 erected on the carrier 92 side (FIG. 7) or on the holding metal fitting 94 erected on the lower front side of the collector 40 (FIG. 8). As a result, the lifting hydraulic cylinder mechanism 69 restricts the lowering of the upper and lower links 60 and 62. Next, the horizontal pin 51 of the connection body 50 is extracted, and the connection body 50 is separated from the support frame 46. In this way, the collector 40 can be separated with the support frame 46 left on the vehicle body side of the riding lawn mower 1.

  In the above embodiment, the cylinder bracket 54 as the supporting structure of the lifting hydraulic cylinder mechanism 69 is separated from the support frame 46, and then inverted and replaced with the holding metal fitting 93 of the carrier 92 so that it is supported pivotally. The lifting / lowering hydraulic cylinder mechanism 69 can be easily and quickly replaced on the collector 40 side without inserting or removing the pin 55.

  In addition, the holding metal fitting 93 in the above-described embodiment is configured to stand from the carrier 92 side, or, as shown in FIG. 9, the pivot pin 55 of the hydraulic lifting cylinder mechanism 69 is removed and the lifting cylinder 69a is moved to the carrier 92 side. If it is configured to be directly replaced with the holding metal fitting 93A that is erected, it is possible to prevent the elevating links 60 and 62 from wobbling. In addition, the collector 40, the lift links 60 and 62, and the carrier 92 are integrated with each other, and the collector 40 is not easily displaced with respect to the carrier 92 even when transported by a forklift or transported by a transport vehicle.

  The carrier 92 will be described in detail below. 10 and 11, from a base member 92a having casters 98, 98... On the left and right, front and rear, front support brackets 92b and 92b having a U-shaped rear view, and rear support brackets 92c and 92c having a U-shaped rear view. And a leg portion 92d. Among these, the front support metal fitting 92b and the rear support metal fitting 92c are provided so as to be inclined such that the front side is low and the rear side is high. With this configuration, the front and rear support metal fittings are clamped and fixed with the fastening bolts 92e and the like with the left and right rectangular lower frames 40c formed at the lower part of the collector 40 interposed therebetween. As described above, the support metal fittings 92b and 92c are fixed. Since the height differs between the front and rear sides, even if the lower frame 40c of the collector 40 is mounted in an inclined manner, the receiving height of the front and rear support brackets 92b and 92c with respect to the lower frame 40c is By changing the position of the entire carrier 92 back and forth, the best height position can be selected, the optimum height can be set regardless of the height of the collector 40, and the collector 40 is stably held by the carrier 92. it can.

  In FIG. 12, the container 40 itself is provided with a carrier mechanism. The floor plate portion 40d of the collector 40 is divided into front and rear, the front floor plate 40e is provided so as to be pivotable downward at the front fulcrum, and the rear floor plate 40f is configured to be pivotable downward at the rear fulcrum. In addition to manual operation as shown in the figure, it is configured to be arbitrarily operable by connecting to an external rotation actuator (for example, the dumping cylinder mechanism 72 etc.), and when used as a carrier, Both the floor boards 40f are rotated downward to form a substantially vertical posture, and the collector 40 can be supported with respect to the ground. Further, the rear floor plate 40f is configured to be able to stand in an upwardly inclined state from a standard posture in which the floor is formed by returning. If comprised in this way, both the front floor board 40e and the back floor board 40f will be in the state which accommodates the cut grass in the collector 40 as a standard attitude | position, and the discharge | release state which discharges the cut grass out of the collector 40 by raising the back floor board 40f in inclination. Can be switched.

  13 and 14 show different examples of the dump cylinder mechanism and its peripheral configuration. In this configuration, a single dump cylinder mechanism 72A is disposed on one side of the collector 40. A vertical link 63A connected to the upper ends of the elevating links 60 and 62 is extended upward, and a dump cylinder mechanism 72A, that is, a hydraulic linear actuator called an electric hydraulic cylinder is provided in the extended portion. One end of the double acting piston of the dump cylinder mechanism 72A is connected to the extension of the vertical link 63A, and the other end is connected to the container frame reinforcing arm 95. The base portion 95a of the container reinforcing arm 95 is rigidly connected to one end of a cylindrical connecting frame 67A that connects the pair of left and right vertical links 63A, 63A, and appropriately connects and reinforces the framework of the container 40. It is configured as follows. The vertical links 63A and 63A arranged on the left and right are connected to both ends of a rotating shaft 66A inserted through the cylindrical connection frame 67A. Accordingly, when the elevating links 60 and 62 are stopped at the predetermined elevated position and the dump cylinder mechanism 72A is extended from this state, the container frame reinforcing arm 95 is pushed downward to rotate the collector 40 about the rotation axis 66A. Since the container reinforcing arm 95 is configured to reinforce the collector 40 and this arm is used to connect the dump cylinder mechanism 72A, the twist of the collector 40 is reduced to ensure smooth operation, and the dump cylinder The cost can be reduced by using a single mechanism 72A.

  FIG. 15 shows an example in which the dumping cylinder mechanism 72B is incorporated by configuring the upper link 60 itself of the lifting links 60 and 62 to be extendable and retractable by hydraulic drive. That is, an auxiliary hydraulic cylinder mechanism 96 including a hydraulic cylinder 96a, a piston portion 96b, and pipes 96c and 96c is formed on the distal end side of the upper link 60. When the collector 40 moves up and down, the auxiliary hydraulic cylinder mechanism 96 is kept in a shortened operation state. When the collector 40 is dumped at the raised position, the auxiliary hydraulic cylinder mechanism 96 is extended to rotate around the collector rotation fulcrum shaft 66 formed on the vertical link 63.

By comprising in this way, the cylinder mechanism for dumping and the piping 96 to it can be comprised neatly, and the appearance is also improved.
In the configuration of FIG. 16, the elevating links 60 and 62 are also used as hydraulic pipes, and the omission of the pipes prevents damage and improves the appearance. The inside is a sealed space 98a, and a hydraulic adapter 99 is provided to be connectable, and the connecting portion 100 that connects the left and right lifting links 60, 60 or 62, 62 is also configured as a sealed space 98b so that pressure oil can flow. It becomes.

17 and 18 show different configurations of the collector 40 connecting portion.
The hook portions 100, 100 formed on the front channel member 48A of the pair of left and right connecting bodies 50A in which the channel members 48A, 49A are integrated back to back are overlapped on the support frames 46, 46 from the rear side of the support frame 46. The upper and lower portions are engaged with the horizontal pins 101 and 101, respectively, and the engagement between the hook portions 100 and 100 and the horizontal pins 101 and 101 is held by the fastening bolt 102 from the front side. When the tightening bolt 102 is loosened, the lateral pin 101 is prevented from falling off the hook portion 100. The tightening bolt 102 is screwed to a U-shaped bracket 104 that can rotate around the support pin 103, and the tightening bolt 102 moves forward by the forward rotation using the handle 105 to fix the bracket 104. It is a configuration. By reverse rotation, the tightening bolt 102 moves backward to free the bracket 104 around the support pin 103 (FIG. 17).

  Further, instead of the front channel member 48 with respect to the rear channel member 49, an insertion frame 106 that can be inserted from above into the opening 46 a that opens at the top of the support frame 46 is configured, and is formed at the front upper portion of the insertion frame 106. The hook portion 108 provided on the receiving frame 107 on the support frame 46 side is configured to exceed the fulcrum, and is configured to be locked and released by operating the lever 109 (FIG. 18). With this configuration, there is an effect that the configuration can be simplified by switching between locking and releasing with one touch.

2 Front wheel 3 Rear wheel 15 Mower 37 Shooter 40 Collector 46 Support frame 60 Elevating link 62 Elevating link 63 Vertical link 66 Rotating fulcrum shaft 67 Connecting frame 69 Elevating cylinder 72 Dump cylinder mechanism 85 Bottom plate 85a Mountain height 87 First piping 88 First 2 piping

Claims (4)

  Front wheel (2) Steering wheel and rear wheel (3) Drive wheel, mower (15) is provided at the lower part of the vehicle body so that it can be moved up and down, and the cut grass is attached to the rear part of the vehicle body via the shooter (37). In the riding lawn mower configured to be collected by the collector (40), a support frame (46, 46) is erected on the rear part of the vehicle body, and a pair of upper and lower lift links (60, 62) is mounted on the support frame (46, 46). ) Are arranged on the left and right of the collector (40), the vertical links (63, 63) are connected to the ends of the left and right lifting links (60, 62), and the left and right vertical links (63, 63) are connected. The connecting frame (67) is provided, and the collector (40) is fixedly provided on the dump pivot support shaft (66, 66) of the vertical link (63, 63), and the connecting frame (67) and the collector (40) are connected. Floor reinforcement frame (40 ) Between, riding lawn mower that is characterized by providing dampening cylinder mechanism (72) telescopically.   A pair of first pipes (87, 87) and second pipes (88, 88) are provided, of which the first pipes (87, 87) are connected to the lifting cylinders (69a, 69a), and the second pipes. (88, 88) is connected to the dump cylinder mechanism (72), the second pipe (88) is held along one of the upper and lower links (60, 62), and is further held by the connecting frame (67). The riding lawn mower according to claim 1, wherein the lawn mower is connected to the dump cylinder mechanism (72).   The piston side end (72a), which is one end side of the dump cylinder mechanism (72), is connected to the left and right intermediate part of the connecting frame (67), and the other end is connected to the left and right sides of the floor reinforcing frame (40b) of the collector (40). The riding lawn mower according to any one of claims 1 and 2, wherein the lawn mower is connected to an intermediate portion.   The bottom plate (85) of the collector (40) has a left and right intermediate portion formed in a mountain height portion (85a), and a dump cylinder mechanism (72) is disposed below the mountain height portion (85a). Riding lawn mower.

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