JP4940897B2 - Riding lawn mower - Google Patents

Description

  The present invention relates to a riding lawn mower in which a mower that performs ground work such as lawn mowing is mounted below the fuselage.

  The riding lawn mower is configured to collect turf grass cut by a lawn mower (moor) on a collector back at the rear of the machine body through a shooter and a duct. In addition, a transmission that shifts the power from the engine is used to run a blower and an airframe that are provided to air-carry the turfgrass cut to the collector back.

  A so-called front mower type riding lawn mower with a mower mounted on the front of the body is disclosed in EP0,800,759 (A1) and EP0,840,998 (B1). These prior arts include a transmission mechanism from the engine located at the rear of the fuselage to the transmission case and blower.

In addition, US Pat. No. 5,761,891 shows a configuration in which the blower is disposed at a position close to the mower, or appropriately disposed at a position away from the rear.
EP0,800,759 (A1) publication gazette EP0,840,998 (B1) Patent Publication US Pat. No. 5,761,891

  In the riding lawn mower according to the inventions described in Patent Documents 1 and 2, since the blower is disposed behind the transmission case, the overall length of the riding lawn mower is increased, and the blower and the shooter are disposed in the middle of the mower and the container. In other words, when transporting a relatively long transport path, the cut grass may become clogged in the blower or the shooter.

 Moreover, in the riding lawn mower of the invention described in Patent Document 3, a traveling system and a PTO system transmission configuration are not disclosed.

  The subject of this invention is providing the riding lawn mower provided with the front mower which made the length of the front-back direction of the whole body compact, and the cut grass did not clog easily in a blower or a shooter.

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 blows and conveys the airframe (2), the mower (6) for mowing the grass arranged in front of the airframe (2), and the grass after mowing the mower (6). , A front and rear wheels (3, 4) provided on the front and rear of the machine body (2), an engine (12), and a hydrostatic continuously variable transmission that shifts and transmits power from the engine (12) In a riding lawn mower equipped with a traveling drive system (C) including devices (41, 42) and a power transmission mechanism (A) including a blower drive system (B) for transmitting power to the blower (17), an engine ( 12) An output shaft (12a) connected to an input shaft (25) to the power transmission mechanism (A), a transmission case (24) for housing the power transmission mechanism (A), and front wheel drive shafts (53L, 53R) Left and right axle transmission cases (23L, 23R) And the blower (17) is disposed between the left and right axle transmission cases (23L, 23R), and the upper position of the power transmission mechanism (A) on the rear side with respect to the forward direction of the vehicle body This is a riding lawn mower in which a hydrostatic continuously variable transmission (41, 42) is arranged at a position below an input shaft (25) attached to the vehicle.

  In the power transmission mechanism (A), the blower drive clutch (32) provided on the same shaft as the input shaft (25) and the blower drive clutch (32) are provided in the power transmission mechanism (A). A blower drive system (B) including a blower drive gear group (33, 34, 35) arranged in a row below the clutch (32), and a traveling gear provided coaxially with the input shaft (25). (31) and a traveling drive system (C) including a traveling gear group (37, 38) arranged in a row below the gear (31), and the blower driving gear group (33, 34, 35). The riding lawn mower according to claim 1, further comprising a front-wheel drive gear mechanism (44, 45, 46, 48) disposed between the vehicle and the traveling gear group (31, 37, 38).

  According to a third aspect of the present invention, the traveling drive system (C) is provided with a traveling gear (31) below the input shaft (25) and at substantially the same position in the front-rear direction of the input shaft (25). The riding lawn mower according to claim 1, wherein an HST pump (41) driven by power from an input shaft (25) is disposed.

  According to a fourth aspect of the present invention, a pulley (26) is provided on the input shaft (25), and a mower power transmission mechanism for transmitting the power of the engine (12) to the mower (6) via the pulley (26). The riding lawn mower according to claim 1, wherein (28, 29, 30) is provided.

  According to the first aspect of the present invention, the transmission case (24) that houses the power transmission mechanism (A), the left and right axle transmission cases (23L, 23R) that house the transmission mechanism to the front wheel drive shafts (53L, 53R), and To form a portal frame, and a blower (17) having a large volume is disposed between the left and right axle transmission cases (23L, 23R), so that the blower (17) is disposed between a pair of front wheels (3, 3). Since it can arrange | position, the whole height of a lawn mower can be restrained compared with a prior art.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the front wheel drive is provided between the blower drive system (B) and the travel drive system (C) in the power transmission mechanism (A). Since the gear mechanism (44, 45, 47) and the like can be arranged, the front-rear length of the airframe (2) can be shortened as compared with the prior art, and the front-wheel drive gear mechanism (44, 45, 47). ) Etc. can be secured.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, the HST pump (41) is arranged at substantially the same position in the front-rear direction as the input shaft (25) below the input shaft (25). As a result, the longitudinal length of the airframe (2) is shorter than that of the prior art.

  According to the fourth aspect of the present invention, in addition to the effect of the first aspect, the pulley (26) provided on the input shaft (25) is connected to the mower via the mower power transmission mechanism (28, 29, 30). Power can be transmitted to (6), and the overall length of the lawn mower can be shortened compared to the conventional one.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a left side view of the main part of the riding lawn mower of the present embodiment, FIG. 2 shows a front sectional view of the riding lawn mower of the present embodiment, and FIG. 3 shows a plan view of the mower and the front wheel drive unit. In the present invention, the left and right directions in the forward direction of the lawn mower are referred to as the left side and the right side, respectively, the forward direction is referred to as the front side, and the reverse direction is referred to as the rear side.

A front wheel 3 and rear wheels 4, 4 are provided at the front and rear of the traveling machine body 2, respectively, and a mower 6 having a cutter 5 that rotates about a vertical axis is provided below the front part of the machine body 2.
A steering column 8 is erected on the floor 7 above the front of the machine body 2, and a handle 10 is provided on the top of the column 8. A cockpit 11 is provided behind the steering wheel 10, an engine 12, a radiator 13, and a bonnet 14 covering these are arranged behind the cockpit 11, and a collector 16 is provided above the hood 14.

  A blower case 18 having a blower 17 with an axial center provided in the front-rear direction is disposed between the left and right front wheel transmission cases 23L and 23R below the cockpit 11, and the blower 17 is operated by the output of the engine 12. . A turfgrass transport duct 20 that connects the blower case 18 and the collector 16 is provided above the blower case 18. Further, a shooter 21 that is shaped to rise after side view is disposed between the blower 17 and the mower 6, and the turf grass cut by the mower 6 is a short cylindrical guide guide portion from the discharge port at the rear center of the mower deck 6 a. 6b and the end portion are superposed on the guide portion 6b and sent to the blower 17 via the shooter 21 provided so as to be able to be bent, and further conveyed by air to the rear collector 16 via the duct 20. In addition, since the wind is generated by the rotation of the cutter 5 of the mower 6, the wind also helps air conveyance toward the grass collector 16 cut by the blower wind.

As shown in FIG. 2, a blower 17 is disposed between the left and right front wheel transmission cases 23L and 23R, and a duct 20 is connected to the rear of the blower 17. It is configured to store turfgrass and the like that have been cut.
Accordingly, the blower 17 having a large volume can be disposed between the front wheels 3 and 3, and the overall height of the lawn mower can be kept relatively low.

The operation mechanism and the like of the mower (lawn mower) 6 having the above-described schematic components will be described with reference to a side view of the power transmission mechanism in FIG.
The output shaft 12a of the engine 12 is extended forward of the engine 12, and the power is transmitted from the output shaft 12a to the power transmission mechanism A in the mission case 24 via the universal joint shaft 15 to the transmission input shaft 25. Is done. A pulley 26 is integrally provided on the input shaft 25. That is, the pulley 26 is formed in the trumpet-like portion 25 a at the end of the input shaft 25 that covers the outer periphery of the joint portion 15 a between the input shaft 25 and the universal joint shaft 15. Then, power is transmitted from the pulley 26 via the belt 30 to the pulley 29 on the mower PTO shaft 28 disposed at substantially the same position in the front-rear direction of the input shaft 25 and the machine body 2, and the mower PTO shaft 28, The pulley 29 and the belt 30 are referred to as a mower power transmission mechanism.

  In the above configuration, the trumpet-like member 25a having the pulley 26 provided integrally with the input shaft 25 of the power transmission mechanism A is positioned so as to cover the joint portion 15a between the input shaft 25 and the universal joint shaft 15. The overall length of the lawn mower can be shortened.

The engine power transmitted to the input shaft 25 provided in the mission case 24 is distributed to the blower drive system B and the travel drive system C of the power transmission mechanism A, respectively.
The blower drive system B is provided on a rotary shaft 25c integrated with the input shaft 25 via a coupling 25b to the input shaft 25, and a blower drive clutch 32 for turning on and off engine power to the blower drive system B and the clutch. The clutch output gear 33, the intermediate transmission gear 34, the input gear 35, and the blower drive shaft 36 having the input gear 35 on the shaft are sequentially transmitted.

  The traveling drive system C also includes a counter gear 37 that transmits power from the traveling gear 31 fixed to the input shaft 25, an HST input gear 38 that meshes with the counter gear 37, and an adhesion of the HST input gear 38. HST pump drive shaft 39.

  Further, a hydrostatic continuously variable transmission (HST) (41, 42) is disposed below the input shaft 25, and is driven by the HST pump drive shaft 39. The HST motor is driven by hydraulic power from the HST pump 41. 42, an output shaft (hydraulic motor shaft) 43 of the HST motor 42, a bevel gear 45 meshing with a drive pinion 44 on the output shaft 43, an interlocking gear 46 provided in parallel with the bevel gear 45, the bevel gear 45 and the interlocking gear 46 A transmission mechanism including an intermediate shaft 47 to be supported and a gear 48 that meshes with the interlocking gear 46 are provided. Sprockets 50L and 50R are provided on the projecting shaft portion of the rotating shaft 49 of the gear 48 projecting from the left and right outside of the transmission case 24. The left and right front wheels are connected to the sprockets 50L and 50R via the chains 52L and 52R and the sprockets 54L and 54R. Power can be transmitted to the drive shafts 53L and 53R. When the left and right front wheel drive shafts 53L and 53R are driven, the left and right front wheels 3L and 3R rotate.

  The sprockets 50L and 50R and the chains 52L and 52R are provided in axle transmission cases 23L and 23R to be mounted on both the left and right sides of the transmission case 24. The transmission frame 24 and the left and right axle transmission cases 23L and 23R form a portal frame. Composed.

  Further, the HST 41 and 42 are arranged so that the HST motor shaft 43 is positioned at the same position as the input shafts 56L and 56R of the axles 55L and 55R of the left and right rear wheels 4L and 4R using the HST input gear 38.

  Further, the HST pump shaft 39 is driven through the gear group of the traveling gear 31, the counter gear 37, and the HST input gear 38, and the input rotation of the HST pump shaft 39 can be set to be higher than the engine rotation. Therefore, the number of revolutions of the engine 12 itself can be lowered and noise can be reduced.

  Further, since the HSTs 41 and 42 can be disposed at a position lower than the engine 12 using the traveling drive system C having the above-described configuration, the input shaft 56 of the axle 55 of the rear wheel 4 and the HST motor shaft 43 can be coaxialized, and 4WD. Input can be simplified.

  Further, as described above, the transmission system using the chain 52 for driving the front wheel drive shaft 53 is a portal frame made up of the transmission case 24 and the left and right axle transmission cases 23L and 23R, and adopts a portal transmission type power transmission mechanism. Therefore, by arranging the blower 17 between the front wheel drive shafts 51, 51, the blower 17 can be arranged between the front wheels 3, 3, and the distance between the blower 17 and the mower 6 is reduced and trimmed. Conveyance performance of turfgrass etc. is improved.

  Further, a blower drive clutch 32 is provided in front of the input shaft 25 to the power transmission mechanism A, and a gear group of the traveling transmission system C and a gear of the blower transmission system B to the hydrostatic continuously variable transmissions (HST) 41 and 42 are provided. By arranging the gear group (44, 45, 46, 48) between the groups, the height of the power transmission mechanism A from the ground can be maintained as high as possible while shortening the front-rear length of the lawn mower. it can.

  Further, since the input shaft 56 of the rear wheel drive shaft 55 is coaxial with the HST motor shaft 43, the drive system of the rear wheel 4 is simplified, and a universal joint is used for the connecting portion between the rear wheel drive shaft 56 and the HST hydraulic motor shaft 43. There is no need, and a simple power transmission system can be obtained.

  If it repeats, the input shaft 25 from the engine 12 will be provided in the rear surface of the power transmission mechanism case 24, the biaxial type HST41,42 will be arrange | positioned under the input shaft 25, and driving transmission for power transmission to HST41,42 will be carried out. Power is transmitted to the HSTs 41 and 42 by the gear train (31, 37, 38) of the system C, a blower drive clutch 32 is provided in front of the input shaft 25 to the power transmission mechanism A, and the power from the clutch 32 is supplied to the HST. There is provided a gear train (33, 34, 35) of the blower transmission system B that transmits to the blower shaft 36 at substantially the same height as the pump input shaft 39.

  By disposing the blower driving clutch 32 above the power transmission mechanism A with the blower transmission system B by the arrangement of the power transmission system described above, traveling with the gear train (33, 34, 35) of the blower driving gear group is achieved. Since a space is generated between the gear train (31, 37, 38) of the transmission system C, a gear group (44, 45, 46, 48) for driving the front wheels can be arranged in this space, and the power transmission system The front / rear length of the power transmission system can be shortened without lowering the ground clearance.

  Since the input shaft 25 and the HSTs 41 and 42 are arranged in the vertical direction at the same position in the longitudinal direction of the body, the longitudinal lengths of the traveling drive system C and the blower drive system B may be relatively short.

  Further, by providing the blower drive clutch 32, the blower drive system B is made independent of the travel drive system C and the other drive systems of the mower power transmission mechanism (mower PTO shaft 28, pulley 29, belt 30, etc.). The drive transmission system to the mower 6 can be established with a simple configuration up to a far position avoiding the blower 17 by adopting the drive belt 30 as a part of the mower power transmission mechanism.

Next, the configuration of the lifting mechanism of the mower 6 will be described.
FIG. 5 is a left side view of the mower mounting portion when the front portion of the mower 6 is lifted, FIG. 6 is a plan view of the mower mounting portion, and FIG. 7 is a mower installed in a state where mowing is possible. FIG. 8 shows a plan view (FIG. 8 (a)) and a side view (FIG. 8 (b)) of the mower elevating link.

  The end of the mower 6 is pivotably attached to the front of the machine body 2 and the front side can be moved up and down, so that the mower 6 can be raised and lowered. Hereinafter, the left and right symbols L and R may not be used for the left and right members provided.

  As shown in the plan view of FIG. 8A and the side view of FIG. 8B, the lifting links 60 of the mower 6 are arranged on both sides of the lower space 62 formed on the lower side of the body 2 with a pair of left and right. The base portion is pivotally supported by a mounting plate 65 provided by being fastened to the mating surfaces of the left and right final cases 64 provided with gears for driving the front wheels 3, and is extended to the front side and left and right at the front end portion. The structure is such that the support rod 63 that supports the gauge wheel 69 on the front side of the integrated moor deck 6a and the connecting pin 66 (or 78) are detachably connected. The mower deck 6a is configured such that the lower end of the mower deck 6a is detachably connected to the airframe 2 side by a rear link 67 and can maintain the posture together with the gauge wheels 69 provided at the front and rear.

  As shown in FIGS. 6 and 8, in the case of this embodiment, the elevating link 60 is formed such that the front end portion 60a is formed in a fixed parallel length with a wide left and right interval in plan view, and the left and right sides from the middle portion are inward An intermediate portion 60b that is inclined in a straight line is formed, and a base portion 60c that is formed in parallel with a narrow space and is formed in succession to the intermediate portion 60b. As shown in FIG. 8 (a), the L-shaped connecting rod 70 is connected by welding both ends to the inside of the corner formed at the portion where the tip portion 60a and the intermediate portion 60b are joined. As shown in FIGS. 5, 7 and 8, the mounting member 73 for connecting the lift rod 71 is connected and supported in a pivoted state. The attachment member 73 is detachably connected to the lift rod 71 connected to the tip of the upper lift arm 74 (rotating fulcrum whose rear portion is in a fixed position), and is connected to the interlocking arm from the lifting hydraulic cylinder 75 equipped at the rear. A pair of right and left lifting links 60 is moved up and down via 77.

  In this way, the lifting link 60 reinforces the mower deck 6a by connecting the L-shaped connecting rod 70 to the corner portion formed at the intermediate portion of the saddle material where the tip portion 60a and the intermediate portion 60b are connected by welding. In addition, the mounting member 73 is connected using the L-shaped connecting rod 70 as an attachment support member. And as above-mentioned, the raising / lowering link 60 was set as the structure which supports the base to the attachment plate 65 fastened together using the final case 64 of the front wheel 3, Therefore A sufficient intensity | strength can be ensured and the structure of attachment support is easy. There is a feature that became.

  Next, an extension arm 76 for folding the lift link 60 when the mower 6 is used to perform turf grass cutting work will be described. As shown in the plan view of FIG. 8 (a) and the side view of FIG. 8 (b), the extension arm 76 is formed in a U-shape so that its transverse cross section can be overlapped with the lifting link 60 and fitted. As a length that can be overlapped with the distal end portion 60a of the lifting link 60 from the lower side, the base portion serves as a pivot portion P at the distal end portion of the lifting link 60 (a position immediately after the support portion 60d through which the connecting pin 66 is inserted). It is configured to be freely foldable into a state where it is overlapped with the elevating link 60 and a state where it rotates and extends forward. The extension arm 76 is in an extended state indicated by a solid line in FIGS. 8A and 8B, in order from the distal end side, and includes a connecting hole 76a, a posture holding hole 76b, an extension position fixing hole 76c (when extended). The connecting pin 66 is inserted into and supported by the support portion 60d of the elevating link 60).

  As shown by the phantom line in FIG. 8 (b), the extension arm 76 configured as described above is moved up and down the link 60 with the pivot portion P as a fulcrum when the mower deck 6a is moved up and down during the turf grass cutting operation by the mower 6. The connecting hole 76a is overlapped with the stop hole 60e of the elevating link 60, and the fixing pin 78 is inserted and fixed. Further, a hole (not shown) of the support rod 63 and the elevating link 60 are fixed. The support portion 60d is made to coincide, a connecting pin 66 is inserted into the coincident through-hole portion, and a predetermined lawn grass cutting operation is performed while the mower 6 is raised and lowered by the elevating hydraulic cylinder 75.

  Next, when the mower deck 6a stands up for maintenance or the like, first, as shown in FIG. 6, the mower deck 6a has a transmission shaft 81 in which the universal joint 80 of the input transmission box 79a is extended from the mower PTO shaft 28. Then, the connecting pin 66 is removed from the support portion 60d at the front end of the lifting link 60 to separate the mower 6 and the lifting link 60 from each other.

During the turf grass cutting operation, the driving force from the input transmission box 79a is transmitted to the input transmission box 79b to drive the cutter 5 of the other mower deck 6a.
Further, the guide guide 6b is separated from the airframe 2 side, and the rear link 67 is also separated from the mower 6 so that all the connecting portions of the mower 6 to the airframe 2 are separated.

  Subsequently, as shown in FIGS. 8A and 8B, the fixing pin 78 is removed from the elevating link 60, and the extension arm 76 is rotated forward with the pivoting portion P as a fulcrum to be extended. The extension position fixing hole 76c on the arm 76 side is overlaid on the support part 60d on the link 60 side, and the connecting pin 66 is inserted into the support part 60d and held and fixed in the extended state.

  The mower deck 6a slightly retracts the work vehicle, moves it to the front side by the length of the extension arm 76, and connects the connecting hole 76a and the mower connection rod 63 at the front end of the extension arm 76 extending to the front side. The holes (not shown) are matched, and a pin 78 is inserted into the matching through-hole portion to connect the extension arm 76 and the mower connecting rod 63. Then, although the mower 6 is moved upward, a lifting lever (not shown) is operated to first supply hydraulic oil to the lifting hydraulic cylinder 75 and extend it. Then, the moor deck 6 is moved forward with the lifting link 60 as a fulcrum through the interlocking arm 77, the lift arm 74, the lift rod 71, the mounting member 73, and the L-shaped connecting rod 70 as the lifting hydraulic cylinder 75 extends. The part is raised, and the posture is changed to a standing state on the front side of the front machine casing of the airframe 2.

  When the mower 6 reaches the standing state with the rear gauge wheel 69 in contact with the ground as shown in FIG. 5, the operator stops the ascending operation and moves the posture holding hole 76b of the extension arm 76 to the moor side. A locking pin (not shown) can be inserted through the stop hole (not shown) to maintain the standing posture.

  As shown in FIG. 5, when the position of the mower 6 is fixed in a standing state on the front side of the front machine frame of the machine body 2, the bottom surface faces the front side and the inside (the cutter 5 or the like) is exposed, and the cutter 5 Etc. can be easily cleaned and maintained.

  In the above-described embodiment, the extension arm 76 is configured to be connected to the front portion of the lifting link 60 in a foldable manner. However, the extension arm 76 can be freely configured to be pulled out and is housed inside the lifting link 60. What is necessary is just to make it the structure to do.

  As described above, according to the embodiment of the present invention, when the mower deck 6a is in the working position, the most part of the mower deck 6a is located in the lower space 62 at the front of the airframe 2 side. Therefore, the length before and after the mower deck 6a and the airframe 2 are combined can be shortened. Accordingly, while the configuration is equipped with the front mower 6, the outer periphery of the rotation of the rotary cutting blade 5 of the mower 6 can be set to a degree slightly forward from the front end of the front machine frame, the work vehicle has a short overall length, A small turn is effective during traveling work, making it easy to turn and the like so that work can be performed efficiently.

  In this embodiment, since the mechanism for moving the mower deck 6a to the front side when moving up and down is composed of the extension arm 76 provided in an extremely simple storing / folding type, the switching between the storing position and the use position can be easily performed. In addition, there is no bulkiness during use, and it has become an excellent product that does not interfere with the up-and-down movement.

  Further, in this embodiment, the mechanism for moving the mower deck 6a to the front side is constituted by a simple extension arm 76, and when the extension arm 76 is not used, it is stored in the lifting link 60 side and it can be said that the turfgrass is being cut. Most of them do not get in the way. Further, when extending, the extension arm 76 is extended and fixed forward from the lifting link 60, and the mower deck 6a can be reliably moved to the front side by a simple operation by simply replacing the mower deck 6a. The posture can be easily maintained in the state.

  The present invention is highly useful as a domestic lawn mower for industrial use.

It is a principal part left view of the riding lawn mower of the Example of this invention. It is a principal part front sectional view explaining the blower arrangement of the riding lawn mower of FIG. FIG. 2 is a plan view of a mower and a front wheel drive unit of the riding lawn mower of FIG. 1. It is a principal part left view explaining the power transmission system of the riding lawn mower of FIG. FIG. 2 is a left side view of a mower mounting portion when a front portion of a mower of the riding lawn mower of FIG. 1 is lifted. It is a top view of the mower attachment part of the riding lawn mower of FIG. FIG. 2 is a side view of a mower mounting portion when the mower of the riding lawn mower of FIG. 1 is installed in a state where lawn mowing is possible. They are a top view (Drawing 8 (a)) and a side view (Drawing 8 (b)) of the raising / lowering link of the mower of the riding lawn mower of FIG.

Explanation of symbols

2 traveling machine body 3 front wheel 4 rear wheel 5 cutter 6 mower 6a mower deck 6b guide guide portion 7 floor 8 steering column 10 handle 11 cockpit 12 engine 12a engine output shaft 13 radiator 14 bonnet 15 universal joint shaft 16 collector 17 blower 18 blower case 20 Duct 21 Shuter 23 Front wheel transmission case 24 Mission case 25 Mission input shaft 25a Trumpet-like member 25b Coupling 25c Rotating shaft 26, 29 Pulley 28 Moor PTO shaft 30 Belt 31, 33, 34, 35, 48 Gear 32 Blower drive clutch 36 Blower drive shaft 37 Counter gear 38 HST input gear 39 HST pump drive shaft 41 HST pump 42 HST motor 43 HST motor shaft 44 Drive pinion 45 Bevel gear 46 Interlocking gear 47 Intermediate shaft 49 Rotating shaft 50L, 50R Sprocket 52L, 52R Chain 53L, 53R Front wheel drive shaft 54L, 54R Sprocket 55 Rear wheel drive shaft 56 Rear wheel drive input shaft 60 Moore lifting link 62 Lower space 63 Moore support rod 64 Final case 65 Mounting plate 66 Connecting pin 67 Rear link 69 Gauge wheel 70 L-type connecting rod 71 Lift rod 73 Mounting member 74 Lift arm 75 Lifting hydraulic cylinder 76 Extension arm 77 Interlocking arm 78 Fixing pin 79 Input transmission box 80 Universal joint 81 Transmission shaft A Power transmission mechanism B Blower drive system C Travel drive system

Claims (4)

An airframe (2), a mower (6) for mowing the grass arranged in front of the airframe (2), and a blower (17) for blowing and conveying the grass after mowing the mower (6), It includes front and rear wheels (3, 4) provided before and after the airframe (2), an engine (12), and a hydrostatic continuously variable transmission (41, 42) for shifting and transmitting power from the engine (12). In a riding lawn mower equipped with a travel drive system (C) and a power transmission mechanism (A) including a blower drive system (B) for transmitting power to the blower (17),
An input shaft (25) to the power transmission mechanism (A) is connected to an output shaft (12a) of the engine (12), and a transmission case (24) that houses the power transmission mechanism (A) and a front wheel drive shaft (53L, 53R) and a left and right axle transmission case (23L, 23R) that houses a transmission mechanism, and a portal frame, and the blower (17) is disposed between the left and right axle transmission cases (23L, 23R), The hydrostatic continuously variable transmission (41, 42) is disposed at a lower position of an input shaft (25) attached to an upper position on the rear side with respect to the forward direction of the machine body of the power transmission mechanism (A). Riding lawn mower. In the power transmission mechanism (A), a blower drive clutch (32) provided on the same shaft as the input shaft (25) and the blower drive clutch (32) are arranged below the clutch (32). A blower drive system (B) including a blower drive gear group (33, 34, 35) arranged in a shape;
A traveling drive system (C) including a traveling gear (31) provided coaxially with the input shaft (25) and a traveling gear group (37, 38) arranged in a row below the gear (31). When,
A front wheel drive gear mechanism (44, 45, 46, 48) disposed between the blower drive gear group (33, 34, 35) and the traveling gear group (31, 37, 38). The riding lawn mower according to claim 1.   The travel drive system (C) is located below the input shaft (25) and at substantially the same position in the front-rear direction of the input shaft (25) from the input shaft (25) via the travel gear (31). The riding lawn mower according to claim 1, wherein an HST pump (41) driven by the power of is disposed.   A pulley (26) is provided on the input shaft (25), and a mower power transmission mechanism (28, 29, 30) for transmitting the power of the engine (12) to the mower (6) via the pulley (26) is provided. The riding lawn mower according to claim 1, which is provided.

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