JPH08126424A - Sulky lawn mower - Google Patents

Abstract

PURPOSE: Not to protrude a connecting rod from a cutter housing by relatively shortening the connecting rod between a drive arm and a tension arm in a sulky lawn mower in which the drive arm fixedly connected to an operating lever capable of being operated by a driver and the driving arm and the tension arm are connected by means of the connecting rod. CONSTITUTION: In this sulky lawn mower an operation shaft 65 extending almost vertically is supported with bearings on a machine body 11 rotatably around the shaft, an operating lever 70 is fixed on the upper end of the operating shaft 65 in the neighborhood of a steering handle 18 in front of a drivers seat 19 and a driving arm 75 is fixed on the lower end of the operating shaft 65 just over a cutter housing 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter provided with a front wheel and a rear wheel in front and rear of a machine, and a cutter housing located below the machine is supported between the front wheel and the rear wheel. The cutter is housed in the cutter housing. An endless belt, which is fixed above the cutter housing and is arranged above the cutter housing and is capable of transmitting power from a power source mounted on the machine body, is wound around the driven pulley. A tension arm that has a tension roller that contacts the belt has a clutch-on position that tensions the endless belt with the tension roller to frictionally contact the endless belt with the driven pulley, and a clutch-off position that relieves the tension state of the endless belt with the tension roller. It is supported by a cutter housing and can be rotated between An operating lever is provided on the machine body so that an occupant sitting on the handle can operate, and the drive arm fixedly connected to the operating lever and the tension arm are connected via a connecting rod. Regarding the machine.

[0002]

2. Description of the Related Art Conventionally, such a riding lawn mower is already known, for example, from Japanese Utility Model Laid-Open No. 61-97653.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
The other end of the connecting rod, one end of which is connected to the tension arm, is connected to the drive arm, which is fixedly connected to the operation lever provided at the front end of the machine body, at a position separated from the cutter housing forward. , The connecting rod becomes relatively long. For this reason, the space for arranging the connecting rod becomes relatively large, which adversely affects the degree of freedom in arrangement of other parts, and the body height must be set high in order to secure the upper limit position of the cutter housing. Get lost. Moreover, when attaching or detaching the cutter housing to or from the machine,
It is troublesome to disconnect or connect the connecting rod at a position that is disengaged from the cutter housing, and the connecting rod remains protruding from the cutter housing when the cutter housing is removed from the machine. It is necessary to remove the connecting rod from the tension arm in order to avoid such a situation, and the storage work becomes troublesome.

The present invention has been made in view of the above circumstances, and solves the above problems by connecting the drive arm and the tension arm with a relatively short connecting rod and preventing the connecting rod from protruding from the cutter housing. It is an object of the present invention to provide a riding lawn mower designed to be solved.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a machine body provided with front wheels and rear wheels in the front and rear, and a cutter located below the machine body between the front wheels and the rear wheels. A housing is supported, and a driven pulley fixed to the rotary shaft of a cutter housed in the cutter housing and arranged above the cutter housing can transmit power from a power source mounted on the machine body to the cutter housing. An endless belt arranged above is wound around, and a tension arm having a tension roller in contact with the endless belt has a clutch-on position for tensioning the endless belt with the tension roller to frictionally contact the endless belt with a driven pulley, and a tension. Cutter that enables rotation between the clutch-off position to relieve the tension of the endless belt due to the roller An operating lever is provided on the machine body so as to be operated by an occupant seated on a passenger seat provided on the machine body, and a drive arm fixedly connected to the operation lever and the tension arm are provided. In a riding lawn mower that is connected via a connecting rod, an operating shaft that extends in a substantially vertical direction is supported by the machine body so that it can freely rotate around its axis, and the operating shaft is located near the steering handle in front of the passenger seat. The operation lever is fixed to the upper end of the drive shaft, and the drive arm is fixed to the lower end of the operation shaft immediately above the cutter housing.

According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, a drive arm fixed to an operation shaft supported by the machine body and a tension arm supported by the cutter housing are provided. And a connecting rod connected to the above are detachably connected.

According to the invention of claim 3, in addition to the structure of the invention of claim 1, below the airframe,
A rear wheel power transmission endless belt for transmitting power from a crankshaft of an engine mounted on the machine body to rear wheels is movably arranged, and an operation shaft is located outside the rear wheel power transmission endless belt. Is located in.

[0008]

According to the structure of the first aspect of the present invention, the drive arm is fixed to the lower end of the operation shaft immediately above the cutter housing, so that between the tension arm and the drive arm arranged above the cutter housing. The distance is relatively short, and the connecting rod that connects the tension arm and the drive arm does not protrude from the cutter housing.

According to the configuration of the invention described in claim 2, the cutter housing can be detached from the machine body by disconnecting the connecting rod from the drive arm, and the maintenance of the endless belt becomes easy.

Further, according to the configuration of the invention described in claim 3, the operation shaft is prevented from being an obstacle during maintenance of the rear wheel power transmission endless belt, and the rear wheel power transmission endless belt is attached and detached. It becomes possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 9 show one embodiment of the present invention, FIG. 1 is a side view of a riding lawn mower, and FIG. 2 is FIG.
FIG. 3, FIG. 3 is a view taken along the line 3-3 in FIG. 1 in the clutch-off state, FIG. 4 is a view corresponding to FIG. 3 in the clutch-on state, and FIG. 5 is an enlarged cross-section taken along line 5-5 in FIG. 6 and 6 are shown in FIG.
-6 line enlarged sectional view, FIG. 7 is a sectional view taken along line 7-7 of FIG.
Is an enlarged sectional view taken along line 8-8 of FIG. 1, and FIG.
9 is a sectional view taken along line 9. FIG.

First, referring to FIG. 1 and FIG.
A pair of front wheels W on the front_F, W_FIs steerably suspended
You. On the other hand, the mission case 12 is at the rear of the airframe 11.
It is fixed, and both left and right of the mission case 12
With the rear axle housing 13, 13 fixed to the side
Rear wheel W_R, W_RIs rotatably supported. Then, Mi
Input to the input shaft 14 protruding from the upper part of the option case 12
The motive power generated is the transmission mechanism in the mission case 12 and
And rear wheels W via a differential mechanism (not shown)_R, W _RIn
Reached

A support base 15 is fixed on the machine body 11 at the rear side of the engine E, and a cover 16 having a column portion 16a that extends upward so as to cover the support base 15 is provided.
1 so as to cover the upper part thereof. In the column portion 16a, there is housed a steering stem 17 which extends vertically to steer both front wheels W _F , W _F and which is rotatably supported by a support base 15. A steering handle 18 located above the column portion 16a is fixed to the upper end of the. In addition, the cover 1 is provided at a position spaced backward from the column portion 16a.
A passenger seat 19 for the occupant who steers the steering handle 18 is arranged at 6. Further, the engine E on the machine body 11 is covered with a hood 20 connected to the machine body 11 so as to be able to jump forward.

The power from the crankshaft 22 having a substantially vertical axis and extending downward from the engine E is transmitted to the input shaft 14 of the transmission case 12 via the power transmission means 23. The power transmission means 23 includes a drive pulley 24 fixed to an intermediate portion of the crankshaft 22, a driven pulley 25 fixed to the input shaft 14, and a rear wheel power wound around the drive pulley 24 and the driven pulley 25. Endless belt 26 for transmission
The endless belt 26 for power transmission of the rear wheels is also wound around the idle pulleys 27 and 28 that are rotatably supported by the machine body 11 and are provided with. Moreover, a tension roller 29 is brought into contact with the outer periphery of the rear wheel power transmission endless belt 26 between the driven pulley 25 and the idle pulley 28. The tension roller 29 causes the rear wheel power transmission endless belt 26 to be tensioned. And the position where the rear wheel power transmission endless belt 26 is brought into frictional contact with the respective pulleys 24 to 28, and the tension state of the rear wheel power transmission endless belt 26 is relieved to reduce the rear wheel power transmission endless belt 26 and the pulleys 24. It is movable to and from a position where it slides between .about.28.

Referring to FIGS. 3 and 4 together, a cutter housing 30 is disposed below the machine body 11 between the front wheels W _F , W _F and the rear wheels W _R , W _R , and the cutter housing 30. Is supported by the machine body 11 so that it can be moved up and down by a link mechanism 31.

The cutter housing 30 is formed in a dish shape with the lower part opened and accommodates a pair of cutters 32 ₁ and 32 ₂ for discharging the grass cut by the cutters 32 ₁ and 32 ₂ . The discharge port 33 is provided on one side of the cutter housing 30. Further, on both sides of the cutter housing 30, the sculp roller 3 that rolls on the ground to define the lowest position of the cutter housing 30 is provided.
4, 34 are pivotally supported.

The link mechanism 31 has its front ends connected to the machine body 11 by support shafts 35, 35 having the same axis and rear ends of a pair of brackets 41 ₁ , 41 ₂ fixed to the front portion of the cutter housing 30. Are connected via a common support shaft 36 to a pair of front links 39 ₁ and 39 ₂ and support shafts 37 and 37 having the same axis, so that their front ends are connected to the machine body 11 and at the rear of the cutter housing 30. It is composed of a pair of rear links 40 ₁ and 40 ₂ whose middle portions are connected to a pair of fixed brackets 42 ₁ and 42 ₂ via supporting shafts 38 and 38 having the same axis. Thus each spindle 3
Reference numerals 6, 37, 38 and 39 are arranged so as to be located at the respective vertical angles of the parallelogram in a side view, and the link mechanism 31 constitutes a so-called parallel link. Therefore, the cutter housing 30 moves up and down while keeping its posture with respect to the ground.

On the left side of the riding seat 19, a base end of a lifting operation lever 43 is rotatably supported on the machine body 11,
A rear end of the rear link 40 ₁ of the link mechanism 31 is connected to an intermediate portion of the elevating operation lever 43 via a connecting member 44. Thus, the elevating operation lever 43 can hold a plurality of rotation operation positions. That is, the lifting operation lever 43
The operation lever 43 is held in a plurality of grooves 87 provided in the guide plate 86 by rotating and moving left and right, so that the cutter housing 30 is held at a plurality of upper and lower positions. 43 can be moved up and down.

Referring also to FIG. 5, the cutter housing is
A rotary shaft 45 extending vertically in the gear 30. ₁, 45₂Rotating itself
Bearing housing 46 currently supported₁, 46₂Is stuck
The rotary shaft 4 inside the cutter housing 30.
5₁, 45₂Cutter 32 at the bottom of₁, 32₂Is fixed
Be done.

Crankshaft 2 of engine E as a power source
2 and the rotary shafts 45 ₁ and 45 of the cutters 32 ₁ and 32 _2
A winding transmission means 47 is provided between the drive pulley 48 fixed to the lower end of the crankshaft 22 and the rotary shafts 45 ₁ , 45 ₂ above the cutter housing 30. Driven pulleys 49 ₁ and 49 ₂ respectively fixed to the upper ends of the drive pulley 48 and the endless belt 50 wound around the drive pulley 48 and both driven pulleys 49 ₁ and 49 ₂ .

Referring also to FIGS. 6 and 7, the support shaft 5 is provided in the upper surface of the cutter housing 30 substantially in the center thereof.
3 is fixed by a bolt 54, and the base end portion of the tension arm 51 is rotatably supported by the support shaft 53. That is, a support cylinder 55 extending upward is fixed to the base end of the tension arm 51, and the support shaft 53 is fitted in the support cylinder 55 so as to be relatively rotatable. A tension roller 52 is axially supported by the free end of the tension arm 51 via a shaft 56 having an axis parallel to the support shaft 53, and the tension roller 52 contacts the endless belt 50 on the outer surface side thereof. . Thus, the tension arm 51 tensions the endless belt 50 with the tension roller 52 and the clutch-off position (position shown in FIG. 3 and the solid line in FIG. 7) for relaxing the tension state of the endless belt 50. Thus, the endless belt 50 is rotatable between a clutch-on position (a position shown in FIG. 4 and a position shown by a chain line in FIG. 7) in which the endless belt 50 is brought into frictional contact with the drive pulley 48 and the driven pulleys 49 ₁ and 49 ₂ .

A spring 57 is contracted between the upper end of the shaft 56 at the free end of the tension arm 51 and a bracket 58 fixed to the rear of the cutter housing 30. The arm 51 elastically holds the clutch-off position and the clutch-on position, respectively. That is, the tension arm 5
The position of the bracket 58 is determined so that the spring 57 crosses the support shaft 53 at the base end portion of the tension arm 51 when the clutch 1 moves between the clutch-off position and the clutch-on position. 7, the spring 57 exerts a spring force in a direction in which the tension arm 52 is biased in the clockwise direction to relax the tension of the endless belt 50 by the tension roller 52, while the clutch 57 is at the clutch-on position. The spring 57 exerts a spring force in a direction that urges the tension arm 51 in the direction to increase the tension of the endless belt 50 by the tension roller 52.

The bearing housing 46 ₁ includes an endless belt 5
An intermediate portion of a brake lever 59 ₁ having a brake shoe 60 ₁ which can press 0 on the outer periphery of the driven pulley 49 ₁ is rotatably supported via a shaft 62 _1, and an endless belt is provided on the bearing housing 46 _2. 50 driven pulley 49 ₂
An intermediate portion of a brake lever 59 ₂ having a brake shoe 60 ₂ which can be pressed against the outer circumference of the brake lever 60 ₂ on one end side is rotatably supported via a shaft 62 ₂ . The axes 62 ₁ and 62 ₂ are
Bearing housings 46 ₁ and 46 ₂ are attached to cutter housing 3
It also serves as one of a plurality of bolts for fixing to zero.

Brake lever 59₁The other end and the
Brake rod 61 between the base ends of the torsion arm 51₁To
Connected via the brake lever 59₂At one end
And axis 62₂Brake rod 61 between₂Through ten
It is connected to the base end of the arm 51. This allows
As shown in FIG. 3, the tension arm 51 clutches off.
When in the position, both brake levers 59₁, 59₂
Brake shoes 60 at one end of them₁, 60₂By
The endless belt 50 is attached to the driven pulley 49.₁, 49 ₂Push to
Attach it to force the endless belt 50 to stop running.
Becomes Therefore, the tension arm 51 is the clutch
In the off position, the tension of the endless belt 50 is reduced.
In addition to being harmed, the running of the endless belt 50 is forcibly stopped.
The drive pulley 48 stops the endless belt 5
It will spin while contacting 0. Again tension
Arm 51 is in the clutch on position as shown in FIG.
In the state, both brake levers 59₁, 59₂Is those
Brake shoe 60 at one end₁, 60₂The endless belt 5
It will be separated from zero. Therefore tension
With the arm 51 in the clutch on position, the endless belt
In addition to increasing the tension of the belt 50, the endless belt 50
Driving is allowed, and the drive pulley 48
The driven pulley 49 is driven by the power transmitted to the end belt 50.
₁, 49₂That is, both cutters 32₁, 32₂Is rotating
Will be moved.

A connecting arm 64 is integrally connected to the base end of the tension arm 51. That is, the base end of the connecting arm 64 is fixed to the upper end of the support cylinder 55 at the base end of the tension arm 51 so as to form an angle with the tension arm 51 in plan view.

Referring to FIGS. 8 and 9 together, an operating shaft 65 extending in a substantially vertical direction is provided in the column portion 16a of the cover 16 and, as shown in FIG. The operation shaft 65 is disposed so as to be located outside the endless belt 26 for use, and the operation shaft 65 includes a bearing member 66 provided on the support base 15 and a cutter housing 30.
Directly above it is rotatably supported by a bearing member 68 provided on a support member 67 fastened to the machine body 11 by a pair of screw members 69, 69.

An operation lever 70 is fixed to the upper end of the operation shaft 65, and the operation lever 70 is arranged near the steering handle 18 above the column portion 16a. Thus, the operating lever 70 is operated between the clutch-off position shown by the solid line in FIGS. 7 to 9 and the clutch-on position shown by the chain line in FIGS. 7 to 9.
The operation shaft 65 also rotates between the clutch-off position and the clutch-on position according to the operation of the operation lever 70.

A locking member 71 is fixed to the operation shaft 65 below the bearing member 66, one end of which is engaged with the support base 15 and the other end of the spring 72 is engaged with the locking member 71. Reference numeral 72 serves to elastically hold the clutch-off position and the clutch-on position of the operating lever 70 and the operating shaft 65, respectively. That is, as shown in FIG. 8, a straight line L connecting the engagement position of the spring 72 to the support base 15 and the locking member 71 with the operation shaft 65 in the clutch-off position.
_The operating shaft 65 is set to be located between ₁ and a straight line L ₂ connecting the engaging position of the spring 72 to the support base 15 and the locking member 71 while the operating shaft 65 is in the clutch-on position. In the clutch-off position, the spring force of the spring 72 is exerted in the clockwise direction of FIG. 8, that is, the side that biases the operation shaft 65 toward the clutch-off position side. The spring force of the spring 72 is exerted on the side that biases the operation shaft 65 in the clockwise direction, that is, toward the clutch-on position side.

A switch 73, which is pressed by the locking member 71 when the operating shaft 65 is at the clutch-off position, is fixed to the support base 15. This switch 73 is
A state in which the operating shaft 65 is in the clutch-off position, that is, a state in which power transmission between the crankshaft 22 and the winding transmission means 47 is cut off is detected, and a signal for permitting the start of the engine E is output. In this way, the operating shaft 65 fixedly connected to the operating lever 70 operated by the passenger manually.
With a simple structure in which the position of the locking member 71 fixed to the vehicle is detected by the switch 73, the power transmission cutoff state between the crankshaft 22 and the winding transmission means 47 based on the occupant's intention can be easily detected. be able to.

Therefore, in order to prevent an excessive pressing force from being applied from the locking member 71 to the switch 73, the support base 15 is locked by the locking member 71 with the operating shaft 65 in the clutch-off position. A stopper 74 that abuts is provided.

A base end portion of a drive arm 75 is fixed to the lower end of the operation shaft 65 below the support member 67, that is, immediately above the cutter housing 30 in the vicinity of the tension roller 52, and the drive arm 75 is connected to the operation lever 70. When the operation shaft 65 is rotated by the operation of the
It will rotate in a plane substantially parallel to the operating plane of the connecting arm 64 integral with 1. Moreover, when the operation shaft 65 is in the clutch-off position, the support member 67 has the drive arm 7
5, a stopper 76 for keeping the clutch off position of the operating shaft 65, that is, the operating lever 70, and a clutch for the operating shaft 65, that is, the operating lever 70, which comes into contact with the drive arm 75 when the operating shaft 65 is in the clutch on position. A stopper 77 for keeping the ON position is provided.

The drive arm 75 fixedly connected to the operating lever 70 and the connecting arm 64 fixedly connected to the tension arm 51 are connected via a connecting rod 78. That is, bent portions 78 a and 78 b at substantially right angles are provided at both ends of the connecting rod 78, and the bent portion 78 a at one end side is provided in the drive arm 75 at an engaging hole 79.
, And the bent portion 78b on the other end side is engaged with the engaging hole 80 provided in the connecting arm 64. Thus, in the bent portion 78a, a pair of washers 81, 8 sandwiching the drive arm 75 is provided.
Pins 82, 82 are mounted on the outer side of the pair of washers 8, and the pair of washers 8 sandwiching the connecting arm 64 at the bent portion 78b.
Pins 84, 84 are mounted on the outer side of 3, 83. Therefore, by inserting / removing the pins 82, 82, 84, 84, both ends of the connecting rod 78 are detachably connected to the drive arm 75 and the connecting arm 64.

As the cutter housing 30 moves up and down, the drive arm 75 and the connecting arm 64 of the connecting rod 78 are moved.
Both engagement holes 79 and 80 are formed as long holes to allow the connection position to the connector to be changed.

The operation of this embodiment will now be described. The drive arm 7 is rotated in response to the operation lever 70 being rotated between the clutch-off position and the clutch-on position.
5, the tension arm 51 is rotated between the clutch off position and the clutch on position via the connecting rod 78 and the connecting arm 64, and the power from the crankshaft 22 is transmitted to both the cutters 32 ₁ and 32 ₂ . Transmission means 4
7, the power cut-off state and the power transmission state are switched.

Thus, the operation lever 7 is provided near the steering handle 18 at the upper end of the operation shaft 65 supported by the machine body 11 so as to be freely rotatable about an axis extending in the vertical direction.
0 is fixed, and the drive arm 75 is fixed to the lower end of the operation shaft 65 immediately above the cutter housing 30, and the connecting arm 64 and the drive arm integral with the tension arm 51 arranged above the cutter housing 30. 7
The five are connected via a connecting rod 78. Therefore, the occupant on the riding seat 19 can be operated, the length of the connecting rod 78 can be made relatively short, and the connecting rod 78 can be prevented from protruding from the cutter housing 30. Therefore, the space for disposing the connecting rod 78 can be made relatively small, and the connecting rod 7 can be made as small as the space.
It is possible to increase the degree of freedom in arrangement of other parts around 8. Further, when the cutter housing 30 reaches the upper limit position, the height of the machine body 11 when a space to be set between the cutter housing 30 and the machine body 11 is secured can be set relatively high. In addition, when the cutter housing 30 is attached to or detached from the machine body 11, the connecting rod 78 may be released or connected directly above the cutter housing 30, so that the attaching and detaching operation is easy.

Moreover, one end of the connecting rod 78 connected to the connecting arm 64 connected to the tension arm 51 has one end of the operating shaft 65.
Since the connecting rod 78 is detachably connected to the drive arm 75 that is fixed to, the cutter housing 30 can be detached from the machine body 11 by disconnecting the connection rod 78 from the drive arm 75. Maintenance becomes easy. Further, since the connecting rod 78 does not project from the cutter housing 30 during storage of the cutter housing 30, it is not necessary to remove the connecting rod 78 from the tension arm 51, and the storage operation is facilitated.

Further, the operation shaft 6 is provided below the machine body 11.
Since 5 is arranged on the outer side of the rear wheel power transmission endless belt 26, the operation shaft 65 does not interfere with the maintenance of the rear wheel power transmission endless belt 26, and the rear wheel power transmission endless belt 26 does not interfere. The belt 26 can be easily attached and detached to facilitate maintenance.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

[0040]

As described above, according to the first aspect of the present invention, the steering shaft extending in the vertical direction is supported by the machine body so as to be freely rotatable about its axis, and is located in front of the passenger seat. Since the operation lever is fixed to the upper end of the operation shaft near and the drive arm is fixed to the lower end of the operation shaft just above the cutter housing, the distance between the tension arm and the drive arm arranged above the cutter housing is Relatively short, the connecting rod that connects the tension arm and the drive arm does not protrude from the cutter housing, thus reducing the space required by the connecting rod and increasing the degree of freedom in arranging other parts. In addition to being able to set the height of the machine relatively high, the cutter housing can be easily attached to and detached from the machine. Storage operations of the cutter housing with the easy becomes easy.

According to the invention described in claim 2, in addition to the structure of the invention described in claim 1, a drive arm fixed to an operation shaft supported by the machine body and a tension arm supported by the cutter housing. Since the connecting rod that is connected to the connecting rod is detachably connected, it is possible to easily release the cutter housing from the machine body by disconnecting the connecting rod from the drive arm, and to easily maintain the endless belt.

According to the invention of claim 3, in addition to the structure of the invention of claim 1, below the airframe,
A rear wheel power transmission endless belt for transmitting power from a crankshaft of an engine mounted on the machine body to rear wheels is movably arranged, and an operation shaft is located outside the rear wheel power transmission endless belt. Since it is arranged at the position, the operation shaft can be prevented from interfering with the operation shaft during the maintenance, and the endless belt for rear wheel power transmission can be attached / detached, and the maintenance can be facilitated.

[Brief description of drawings]

FIG. 1 is a side view of a riding lawn mower.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view taken along the line 3-3 of FIG. 1 in a clutch-off state.

FIG. 4 is a diagram corresponding to FIG. 3 in a clutch-on state.

FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 3;

6 is an enlarged sectional view taken along line 6-6 of FIG.

7 is a sectional view taken along line 7-7 of FIG.

8 is an enlarged cross-sectional view taken along line 8-8 of FIG.

9 is a sectional view taken along line 9-9 of FIG.

[Explanation of symbols]

11 ... Aircraft 18 ... Steering handle 19 ... Riding seat 26 ... Rear wheel power transmission endless belt 30 ... Cutter housing 32 ₁ , 32 ₂ ... Cutter 45 ₁ , 45 ₂ ... -Rotation shafts 49 ₁ , 49 ₂ ... driven pulley 50 ... endless belt 51 ... tension arm 52 ... tension roller 65 ... operation shaft 70 ... operation lever 75 ... drive arm 78・ ・ ・ Connecting rod E ・ ・ ・ Engine as power source WF _F・ ・ ・ Front wheel W _R・ ・ ・ Rear wheel

Claims (3)

[Claims] 1. A front wheel (W _F) and the machine body (11) with a rear wheel (W _R) before and after, the front wheel (W _F) and the rear wheels (W
A cutter housing (30) located below the machine body (11) is supported between the _R ) and the cutter housing (3).
Driven pulleys (49 ₁ , 49) fixed to the rotating shafts (45 ₁ , 45 ₂ ) of the cutters (32 ₁ , 32 ₂ ) housed in the cutter housing (0) and arranged above the cutter housing (30).
_2), the machine body (11 a power source mounted on) (endless belt (50 which is disposed above the cutter housing (30) with power from E) as a possible transmission) is wound, endless belt (50 ) Contacting the tension roller (52)
A tension arm (51) having a tension roller (52) tensions the endless belt (50) to frictionally contact the endless belt (50) with the driven pulleys (49 ₁ , 49 ₂ ), (52)
The endless belt (50) is supported by the cutter housing (30) to allow the endless belt (50) to rotate between the clutch off position and the seat (19) provided on the machine body (11). An operating lever (70) is provided on the machine body (11) so as to be operated by an occupant, and the drive arm (75) fixedly connected to the operating lever (70) and the tension arm (51) are connected to each other. In a riding lawn mower connected via a connecting rod (78),
An operating shaft (65) extending in a substantially vertical direction is supported by the machine body (11) so as to be freely rotatable about its axis, and a steering handle (18) located in front of the passenger seat (19).
The operating lever (70) is fixedly mounted on the upper end of the operating shaft (65) in the vicinity of, and the drive arm (75) is fixed on the lower end of the operating shaft (65) immediately above the cutter housing (30). A lawn mower for riding. 2. An operating shaft (6) supported by an airframe (11)
Drive arm (75) fixed to 5) and tension arm (51) supported by cutter housing (30)
The riding lawn mower according to claim 1, wherein the connecting rod (78) connected to the above is detachably connected. 3. An airframe (11) is provided below the airframe (11).
A rear wheel power transmission endless belt (26) for transmitting power from the crankshaft (22) of the engine (E) mounted on the rear wheel (W _R ) to the rear wheel (W _R ) is movably arranged, and the operation shaft (6
The riding lawn mower according to claim 1, wherein 5) is arranged on the outer side of the rear wheel power transmission endless belt (26).