JP5434886B2 - Riding lawn mower - Google Patents

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 structure in which a support frame connected to the rear portion of the traveling vehicle body, a collector mounted on the support frame so as to be movable up and down, and an elevating cylinder mechanism that raises and lowers the collector relative to the support frame are detachable from the traveling vehicle body. Is known (Patent Document 1).

JP 2009-273406 A

  Since the lifting frame mechanism for lifting and lowering the collector and the lifting cylinder mechanism are connected to the support frame, the height and weight are bulky. However, in the configuration disclosed in Patent Document 1, the collector is removed. In this case, since the support frame is removed or attached together with the collector, the weight of the support frame is added in addition to the collector weight, so that the attaching / detaching operation is not easy.

  The present invention is intended to facilitate the attaching / detaching work by leaving the support frame on the traveling vehicle body side.

  The invention according to claim 1 includes front wheel 2 steered wheels and rear wheel 3 drive wheels, and is provided with a mower deck 18 supported so as to be movable up and down at the lower part of the vehicle body, and the cut grass is attached to the rear part of the vehicle body via a shooter 37. In the riding lawn mower configured to be collected by the collector 40, two support frames 46, 46 are erected at the rear part of the vehicle body, and a connecting member 50 configured to be attached and detached by a pin connecting means is attached to the columns 46, 46. The connecting body 50 is provided with a pair of upper and lower elevating links 60, 62, the rear ends of the elevating links 60, 62 are pivotally connected to the collector 40, and further, the supporting frame is provided below the supporting frames 46, 46. The cylinder bracket 54, which is detachable with respect to the pins 46 and 46, can be replaced with the collector 40 side or the carrier 92 side that supports the collector 40 by a pin connecting means. Between the socket 54 and the lift link 62 and riding lawn mower, characterized in that a hydraulic cylinder mechanism 69 for raising and lowering the collector 40.

  The invention according to claim 2 includes front wheel 2 steering wheels and rear wheel 3 drive wheels, and a mower deck 18 is supported 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, two support frames 46, 46 are erected at the rear part of the vehicle body, and a connecting member 50 configured to be attached and detached by a pin connecting means is attached to the columns 46, 46. The connecting body 50 is provided with a pair of upper and lower elevating links 60, 62, the rear ends of the elevating links 60, 62 are pivotally connected to the collector 40, and a cylinder bracket 54 is provided below the support frames 46, 46. A hydraulic cylinder mechanism 69 for raising and lowering the collector 40 is provided between the cylinder bracket 54 and the elevating links 62 and 62, and a lower end portion of the hydraulic cylinder mechanism 69 is provided. Riding lawn mower characterized in that it is configured to be detachable with respect to the Linda bracket 54 by means of a pivot pin 55, and the lower end portion of the hydraulic cylinder mechanism 69 can be replaced with the collector 40 side or the carrier 92 side supporting the collector 40. The machine configuration.

  If comprised like Claim 1 or Claim 2, the lower end part of the connection body 50 and the raising / lowering hydraulic cylinder mechanism 69 of the upper part with respect to the support frame 46 is cut off, and the lower end part of this raising / lowering hydraulic cylinder mechanism 69 is the collector 40 or It replaces with the carrier 92 which receives the collector 40, and the collector 40 is cut off leaving the support frames 46 and 46 in the vehicle body rear part of a riding lawn mower.

  According to the third aspect of the present invention, a pipe support bracket 86 is provided at an appropriate position in the rear part of the traveling vehicle body on the front side of the support frame 46, and a pair of first pipes 87 and 87 and second pipes 88 and 88 are provided on the bracket 86. On the upper side of the pipe support bracket 86, couplers 87a, 87a, 88a, 88a are respectively extended for each pipe, and among these, the first pipes 87, 87 branch through T-shaped pipes. The second pipes 88 and 88 are connected to one of the left and right dump cylinders 72a, and a T-shaped connecting pipe is used for connecting the remaining end portion to the lifting cylinders 69 and 69a. The riding lawn mower according to claim 1 or 2, wherein the piping is connected to the other dump cylinder 72a by pipes 89 and 89.

Accordingly, the couplers 87a, 87a, 88a, 88a are connected and disconnected as the collector 40 is attached / detached, that is, the connector 50 is attached / detached and the cylinder bracket 54 is attached / detached.
According to the fourth aspect of the present invention, the hydraulic cylinder mechanism 69 for raising and lowering is provided by the pivot pins 55 provided on the pair of cylinder brackets 54 and 54 which are superposed on the support frame 46 and detachably connected by the lateral pins 53 and 53. Adjusting bodies 56 and 56 that support the base of the hydraulic cylinder 69c and finely adjust the vertical position of the pivot pin 55 relative to the cylinder brackets 54 and 54 are configured between the cylinder brackets 54 and 54 and the pivot pin 55. The cylinder brackets 54, 54 are separated from the support frame 46, and the cylinder brackets 54, 54 are erected from the carrier 92 side or connected to holding metal fittings 93, 94 erected from the frame portion of the collector 40. Or it is set as the riding lawn mower of Claim 3.

  If comprised in this way, the horizontal pins 53 and 53 will be pulled out, the cylinder brackets 54 and 54 will be removed from the support frame 46, and it will replace with the holding metal fittings 93 and 94 by the side of the carrier 92 or the collector 40 side. Therefore, the position of the elevating links 60 and 62 can be maintained.

  According to the first or second aspect of the present invention, by removing the collector 40 while leaving the support frames 46, 46 at the rear of the vehicle body of the riding lawn mower, the weight of the support frames 46, 46 is not applied, so that the attaching / detaching operation can be performed. It can be simplified. The support frames 46 and 46 can function as a simple safety frame even during running after the collector is removed.

  According to the third aspect of the present invention, the couplers 87a, 87a, 88a, 88a can be connected and disconnected with the attachment / detachment of the coupling body 50 and the attachment / detachment of the cylinder bracket 54, thereby preventing unexpected oil leakage. The first pipes 87 and 87 are branched through a T-shaped pipe and connected to the lift cylinders 69 and 69a, respectively. The second pipes 88 and 88 are connected to one of the left and right dump cylinders 72a. Since the connecting portion has a configuration in which a surplus end portion is connected to the other dump cylinder 72a by the connecting piping 89, 89 using a T-shaped connecting pipe, the piping configuration is simplified and the cost is reduced.

  According to the fourth aspect of the present invention, the horizontal pins 53 and 53 are pulled out and the cylinder brackets 54 and 54 are removed from the support frame 46 and replaced with the holding bracket 93 on the carrier 92 side or the holding bracket 94 on the collector 40 side. The attachment / detachment work is easy without requiring the attachment / detachment of the pivot pin 55. Further, when the collector 40 is mounted in order to perform the work again, adjustment work by the adjustment body 56 is unavoidable.

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 a whole side view at the time of collector removal. It is an enlarged side view of the principal part. It is a piping schematic diagram. It is a whole side view at the time of collector removal which shows another example. It is a collector side view which shows another example. It is a flowchart figure. It is a side view which shows an example of detection sensor installation.

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 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 and 8. As shown in FIG. 1, it is notched in a triangular shape (S).

  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 two links 60 and 62 have their rear portions bent downward, and are attached to the rear end portions of the vertical links 63 and 63 having a square shape when viewed from the side. Reference numerals 64 and 65 denote rotation fulcrums. 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, and the fulcrum 59 of the lower link 62 is smaller than the distance between the fulcrums 58 and 64 of the upper link 60. The distance between 65 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).

  The collector 40 is pivotally supported by a fulcrum 68 provided at an intermediate portion between the vertical links 63 and 63. An elevating hydraulic cylinder mechanism 69 is attached between the lower part of the mast-like support frames 46, 46 and the lower links 62, 62, and the collector 40 is moved by operating the collector elevating lever 69L to guide the hydraulic oil into the hydraulic cylinder 69c. On the contrary, when the hydraulic lift lever 69s 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.

  A configuration for connecting the base of the hydraulic cylinder 69c of the hydraulic cylinder mechanism 69 to the support frame 46 will be described. As shown in FIG. 5, a pair of cylinder brackets 54, 54, which are superposed on the support frame 46 and are detachably connected by the horizontal pins 53, 53, are pivotally supported by a pivot pin 55 provided horizontally. Supports the base. 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 part of the collector 40 is supported in the upright state, so there is no fear that the rear part 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. .

  In the figure, reference numeral 70 is a frame body that is formed integrally with the collector 40 on the outside of the collector 40. When viewed from the side surface, the shape is such that the T-shape is laid down by 90 degrees. A rotation fulcrum 68 of the collector 40 is provided at the long side 70a, and a hydraulic cylinder mechanism 72 for dumping is interposed between the upper portions of the vertical links 63 and 63 and the short side 70b of the frame body 70. When the dump lever 72L is operated and the hydraulic cylinder mechanism 72 for dumping is extended, the collector 40 rotates around the fulcrum 68 in the clockwise direction.

  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. A rectangular cover 85 that covers a part of the hydraulic cylinder 72c and the link piece is provided outside the hydraulic cylinder mechanism 72 for dumping, and when the hydraulic cylinder mechanism 72 for dumping is shortened as shown in FIG. When the cover 85 is accommodated in the corner portion of the cover member 76 and the hydraulic cylinder mechanism 72 is extended, the cover member 76 is opened by moving relatively from the corner portion as shown in FIG. 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 link which opens and closes the opening part of a collector like the past appears in a table | surface part, and does not cause the malfunction that it looks bad.

  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, a pipe support bracket 86 is provided at an appropriate position in the rear part of the traveling vehicle body in front of the support frame 46. The bracket 86 supports a pair of first pipes 87 and 87 and second pipes 88 and 88 through a 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 connected to one of the left and right dump cylinders 72a, and T-joints 88b and 88b are used for the connecting parts, and the other ends are connected to the other dump cylinders by connecting pipes 89 and 89. 72a is connected to 72a. After the T-shaped pipes of the pipes 87 and 87, the 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. Support of the pipes 88 and 88 to one dump cylinder 72a is held along the upper link 60 of the upper and lower links from a state along one side of the support frame 46, and connection pipes 89 and 89 are connected to the collector 40. It is the structure protected by a U-shaped cover member (not shown) provided at the lower rear side.

  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 dumping posture closes the cover member 76 by operating the collector raising / lowering lever 69L and the dumping lever 72L, returns to the forward leaning 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 lift lever 69L 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. 4) or rotated around the pivot pin 55 (FIG. 5). ), The horizontal pin 53 is replaced and held on the holding metal fitting 93 standing on the carrier 92 side (FIG. 4) or on the holding metal fitting 94 standing on the lower front side of the collector 40 (FIG. 5). 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. 7, 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.
FIG. 8 shows a different example. The connecting body 50 and the support frame 46 are connected by parallel links 95, 95, and are configured to move up and down by operation of a detachable auxiliary lever 96. A retractable stand 97 is provided at the lower rear end of the collector 40, and is configured to be switched between a stand posture protruding downward and a storage posture rotating upward by a fulcrum spring 98 and a stopper 99.

  In the above configuration, the stand 97 is set to the stand posture, the cylinder bracket 54 is detached from the support frame 46, and the couplers 87a, 87a, 88a, 88a are pulled out to disconnect the pipes. Next, the lateral pins 51 and 51 for fixing the coupling body 50 to the support frame 46 are removed, and the auxiliary lever 96 is operated to slowly lower the collector 40 together with the lifting links 60 and 62. After lowering, the auxiliary lever 96 and the parallel links 95, 95 are removed. According to this configuration, the collector 40 can be easily attached and detached without a carrier.

  FIG. 9 shows a flow chart of the safety device. When the engine is started (Step 1) and it is determined whether or not a clutch lever (not shown) for operating the PTO clutch to the mower is operated (Step 2), contact is made with the working posture of the collector 40 on the back surface of the support frame 46. When the detection signal of the collector mounting detection sensor 100 disposed at a possible position is inputted and the mounting of the collector 40 is detected (step 3), the PTO clutch is turned on to drive the blade of the mower and the like (step 4), and the collector mounting is performed. The engine is stopped when it cannot be detected (step 5). Here, if the configuration in which the collector 40 can be removed from the support frame 46 as described above is adopted, the engine is stopped when the collector 40 is removed, and the work cannot be performed. That is, the container is removed when the PTO shaft is connected to another work machine such as a snow removal device (not shown) and used as a multi-purpose work vehicle. Therefore, as shown in the figure, a discharge port cover 101 that can cover the outlet portion of the shooter 37 is attached to the rear surface of the support frame 46 so as to be pivotable up and down. When the body 50 is removed, it rotates downward to cover the outlet portion of the shooter 37 and to act on the collector mounting detection sensor 100 disposed in the middle of the support frame 46 to obtain a detection signal equivalent to the collector 40 mounting state. And

  With this configuration, desired work can be continuously executed without stopping the engine by operating the clutch lever for PTO. Moreover, since the discharge port is covered with the discharge port cover 101, even if there is cut grass on the shooter 37, it is not unexpectedly scattered.

2 Front wheel 3 Rear wheel 18 More deck 37 Shooter 40 Collector 46 Support frame 50 Connection body 54 Cylinder bracket 55 Pivot pin 56 Adjustment body 60 Upper link (lifting link)
62 Lower link (elevating link)
69 Lifting hydraulic cylinder mechanism 72 Dump cylinder mechanism 87 First pipe 87 Second pipe 89 Connection pipe 92 Carrier 93 Holding bracket 94 Holding bracket

Claims (4)

  A front wheel 2 steering wheel and a rear wheel 3 drive wheel are provided, and a mower deck 18 is supported at the lower part of the vehicle body so that it can be raised and lowered. In the riding lawn mower, two support frames 46 and 46 are erected at the rear part of the vehicle body, and a connecting body 50 having a detachable structure by a pin connecting means is provided on the support columns 46 and 46. The lifting links 60, 62 are provided, the rear ends of these lifting links 60, 62 are pivotally connected to the collector 40, and further, pin connection means for the support frames 46, 46 below the support frames 46, 46. The detachable configuration of the cylinder bracket 54 can be replaced with the collector 40 side or the carrier 92 side that supports the collector 40, Riding lawn mower, characterized in that a hydraulic cylinder mechanism 69 for raising and lowering the collector 40 between the click 62.   A front wheel 2 steering wheel and a rear wheel 3 drive wheel are provided, and a mower deck 18 is supported at the lower part of the vehicle body so that it can be raised and lowered. In the riding lawn mower, two support frames 46 and 46 are erected at the rear part of the vehicle body, and a connecting body 50 having a detachable structure by a pin connecting means is provided on the support columns 46 and 46. The lifting links 60, 62 are provided, the rear ends of these lifting links 60, 62 are pivotally connected to the collector 40, and the cylinder bracket 54 is provided below the support frames 46, 46. A hydraulic cylinder mechanism 69 for raising and lowering the collector 40 is provided between the links 62 and 62, and the lower end portion of the hydraulic cylinder mechanism 69 is connected to the cylinder bracket 54. Pivot the supporting pins 55 freely configured detachable, riding lawn mower, characterized in that the possible constructed replaces the lower end of the hydraulic cylinder mechanism 69 to the carrier 92 side supporting the collector 40 side or collector 40 and.   A pipe support bracket 86 is provided at an appropriate position on the rear side of the traveling vehicle body on the front side of the support frame 46, and a pair of first pipes 87 and 87 and second pipes 88 and 88 are supported on the bracket 86, and the pipe support bracket 86 is positioned above the pipe support bracket 86. The pipes 87a, 87a, 88a, 88a are respectively extended through the pipes, and the first pipes 87, 87 are branched through the T-shaped pipes and are respectively connected to the lift cylinders 69, 69a. The second pipes 88 and 88 are connected to one of the left and right dump cylinders 72a. A T-shaped connecting pipe is used for the connecting part, and the other end is connected to the other dump cylinder by the connecting pipes 89 and 89. The riding lawn mower according to claim 1 or 2, wherein the riding lawn mower is configured to be connected to 72a.   The base of the hydraulic cylinder 69c of the elevating hydraulic cylinder mechanism 69 is supported by a pivot pin 55 provided on a pair of cylinder brackets 54, 54 that overlaps the support frame 46 and is detachably connected by the lateral pins 53, 53; Between the cylinder brackets 54 and 54 and the pivot pin 55, adjusting bodies 56 and 56 for finely adjusting the vertical position of the pivot pin 55 with respect to the cylinder bracket 54 and 54 are configured, and the cylinder brackets 54 and 54 are supported by the support frame. 4. The riding lawn mower according to claim 1, wherein the cylinder brackets 54, 54 are separated from 46 and are connected to holding brackets 93, 94 erected from the carrier 92 side or erected from a frame portion of the collector 40. Machine.

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