JPH084832Y2 - Blower drive for lawn mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for driving a blower of a lawn mower such as a riding mower.

[Prior Art] It is known that a mower that cuts grass and grass is attached to the lower part of the tractor body, and the cut grass is collected by a collector at the rear of the aircraft.

[Problems to be Solved by the Invention] By the way, in the above-described conventional mounting, wind is caused by the rotating action of the cutting blade housed in the housing of the mower,
Since the method of transporting the mowing grass to the collector side by this wind was adopted, there was a problem that the mowing grass or grass having a long mowing length lacks the carrying capacity and the shooter is clogged with grass.

In order to solve this problem, some of the conventional installations have a blower in the middle of the shooter, but the structure of the drive system of the blower is complicated, or the blower is narrow inside the tractor body. Since it is installed in a place, it has a problem that it is difficult to attach / detach when inspecting and maintaining the transmission, moving the tractor by itself, or moving it far away by a truck.

[Means for Solving the Problem] The present invention is proposed in order to solve the above-mentioned drawbacks of the conventional technology, and has taken the following technical means.

That is, in the lawn mower configured to have the mower 14 below the tractor vehicle body 1 and to collect the grass mowed by the mower 14 through the shooter 16 to the collector 23 at the rear of the vehicle body, the shooter 16 and the collector 23 Between the rear wheel 12 and the outside, the blower device 5 is detachably mounted, and the transmission device 6 for driving the blower device 5 between the rear part of the vehicle body and the collector 23 is laterally attached to the mounting frame 7. This transmission device 6 is attached to the vehicle body along the direction.
A clutch shaft 25 is rotatably driven at one end side thereof by a power take-off shaft 2 which is mounted on a rear portion of a tractor vehicle body 1, and a transmission 6
The other end of the drive shaft is used as a drive shaft for driving the blower 20 so as to project outside the rear wheel 12 so that both shafts are transmission-coupled, and the clutch shaft 25 on one end side of the transmission device 6 separates from the power take-off shaft 2 between the two shafts. The tractor body 1 has a mechanism for maintaining a state and a mechanism for maintaining a power transmission state between both shafts approaching each other, and when the two shafts are in a position where they are separated from each other, the mounting frame 7 in which the transmission device 6 is installed is attached to the tractor body 1. The structure of the blower drive device of the lawn mower is characterized in that it is detachably attached to the rear part.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
First of all, from the configuration, 1 is a tractor vehicle body, an engine 10 is mounted on a front portion of the vehicle body, and is driven by a front wheel 9 steered by a steering wheel 8 and a transmission device in a transmission case 11. A wheel 12 is provided, and a power take-off shaft 2 is rotatably provided at a rear portion of the vehicle body.

A mower 14 for cutting grass and grass is attached to the lower portion of the vehicle body 1, and is configured to rotate and drive the cutting blade of the mower 14 by obtaining power from the power take-off shaft 15 at the front portion of the vehicle body.

Then, on one side of the mower 14, a shooter 16 for transferring the cut grass and grass to the rear is provided, and the rear end of the shooter 16 is opened rearward on the outer side of the rear wheel 12. .

A bracket 18 is attached to the rear portion of the tractor vehicle body 1 by a bolt 17, and a receiving portion 19 is laid on the bracket 18 in the left-right direction.

A mounting frame 7 constituting a machine frame of a transmission device 6 described later is detachably attached to a rear portion of the bracket 18.

The blower device 5 is attached to the right end of the mounting frame 7.
Is attached, the suction port 21 of the blower 20 is connected to the shooter 16, and the upper end of the blowing cylinder 22 is communicated with the upper part of the grass collecting collector 23.

Also, at the rear end of the power take-off shaft 2, a large-diameter roller 24,
A small-diameter take-out gear 3 integrated with the roller 24 is provided. A clutch shaft 25 is rotatably provided around the support shaft 27 by a clutch arm 26 at a position facing the power take-off shaft 2 on the mounting frame 7 on the transmission device 6 side. A clutch gear 4 capable of meshing with the gear 3, a guide plate 45 for guiding the roller 24, a transmission pulley 28, and the like are integrally provided between the clutch gear 4 and the side surface of the clutch gear 4, and the clutch arm 26 is rotated around the support shaft 27. The clutch shaft 4 is kept close to or away from the take-out gear 3 to keep the clutch shaft 25 apart from the power take-off shaft 2, and the clutch shaft 25 is powered. A guide groove 29 provided in the mounting frame 7 is provided with a mechanism for maintaining a power transmission state by bringing both shafts closer to the take-out shaft 2, and guides the switching rotation of the clutch shaft 25 moving away from or toward the clutch shaft 25.

A belt 31 is wound around the transmission pulley 28 of the clutch shaft 25 and the pulley 30 of the fan shaft of the blower 20, so that the blower 20
Is configured to be driven to rotate. A tension pulley 32 is supported by an arm 34 mounted on the mounting frame 7 so as to be swingable around a fulcrum 33, and a belt 35 is supported by a spring 35.
When the clutch gear 4 is rotated upward to switch to the non-transmission state, the belt 31 is pressed by the tension pulley 32, so that the tension of the belt 32 is relaxed. There is. Reference numeral 36 denotes a clutch lever, which is pivotally supported in the middle of a support column 37 which is provided so as to stand upright with respect to the mounting frame 7 so that the clutch arm 26 can be pivotally operated via a rod 38, a spring 39 or the like. I am configuring. The collector 23 is attached using the support pillar 37.

In the above configuration, when the clutch lever 36 is rotated in the direction (a) in FIG. 2, the clutch arm 26 is loosened and is in a freely rotatable state. Therefore, the tension of the belt 31 by the tension pulley 32 causes the transmission pulley 28 to move. Arrow (b)
Direction, the clutch gear 4 is moved in the same direction together with the transmission pulley 28, and power is not transmitted from the take-out gear 3 to the clutch gear 4, that is, the clutch shaft 25 and the power take-off shaft 2 The shafts are separated from each other to maintain a non-transmission state.

The transmission device 6 provided on the mounting frame 7 includes a fan shaft on the drive rotation input side and a drive rotation output side of the clutch shaft 25 that moves up and down as described above and the clutch gear 4 and the transmission pulley 28 provided before and after the clutch shaft 25. And a pulley 30, a belt 31, a tension pulley 32, and the like. When removing or installing the transmission 6 from the tractor body 1,
When the power is disengaged, that is, when the clutch shaft 25 and the power take-off shaft 2 are separated from each other and the non-transmission state is maintained, the gap between the two shafts is wide so that the transmission from the inside of the mounting frame 7 takes place. The device 6 can be easily attached and detached without removing the parts.

On the other hand, when the clutch lever 36 is operated in the opposite arrow (a) direction, the clutch gear 4 is rotated in the opposite arrow (b) direction and meshes with the take-out gear 3. At the same time, since the belt 31 is tensioned by the transmission pulley 28 against the tension pulley 32, the clutch gear 4 is transmitted by the clutch shaft 25, the transmission pulley 28, and the belt.
It is transmitted to the blower 20 side via 31 mag.

In this case, the rotation guide between the roller 24 of the power take-off shaft 2 and the guide plate 45 of the clutch shaft 25 keeps the meshing transmission position between the take-out gear 3 and the clutch gear 4 from being disengaged, and prevents backlash in the front-rear direction. Smooth transmission that is unlikely to occur.

 Next, the operation will be described.

The tractor body 1 is moved forward while transmitting the rotational power of the engine 10 to the traveling part and each rotating part of the mower 14, and at the same time, the clutch lever 36 is rotated to the clutch engaged side, that is, the counter arrow (a) side in FIG. . Then, the mower 14 cuts grass and grass, and the cut grass and grass are transferred to the collector 23 side via the shooter 16.

At this time, the rotational power of the power take-off shaft 2 is the take-out gear 3,
Clutch gear 4, transmission pulley 28, belt 31, pulley 30
Is transmitted to the blower 20 in sequence, and by the suction action of the rotating blower 20, a collector of grass and grass cut
Transport to 23 is facilitated. For this reason, grass and grass do not collect or get stuck inside the shooter 16,
It will be recovered well within 23.

[Effects of the Invention] As described above, the invention has a shooter 16 and a collector 23.
Between the rear wheel 12 and the rear wheel 12, a blower device 5 is provided, and the blower device 5 is detachably attached together with the mounting frame 7, and a transmission device 6 for driving the blower 20 in the blower device 5 is provided. The other end is attached to the tractor vehicle body 1 so as to project outward from the rear wheel 12 so that the other end of the tractor vehicle body 1 runs along the left-right lateral direction. Since it is provided, it can be easily taken out as a power for driving the blower 20 in a wide area outside. Further, a mechanism for keeping the clutch shaft 25 on one end side of the transmission device 6 apart from the power take-off shaft 2,
Since there is a mechanism for maintaining the power transmission state by approaching between the two shafts, the clutch shaft on one end side of the transmission device 6 is removed after the connection between the shooter 16 and the blower device 5 is removed at a wide location on the side of the machine body.
While keeping 25 apart from the power take-off shaft 2, the entire transmission device 6 can be easily removed, and the transmission device can be inspected and maintained, or the tractor can be moved to a nearby position by self-propelled tractor,
This makes it easy to remove the mounting frame 7 incorporating the transmission device 6 when it is moved to a distance on a truck or the like. Even when the transmission device 6 is attached, if the clutch shaft 25 on one end side of the transmission device 6 is attached to the power takeoff shaft 2 while keeping the distance between the two shafts apart, the mounting gap between the two shafts does not matter. If the two shafts are attached and then the two shafts come close to each other and an operation for maintaining the power transmission state is performed, the power transmission can be easily performed. Thus, the transmission device 6 can be easily attached to the rear portion of the tractor body 1.
Can be attached and detached.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which FIG. 1 is a partially sectional plan view, FIG. 2 is a rear view, FIG. 3 is a side sectional view, and FIG. 4 is a side view. Is. In the figure, reference numeral 1 is a tractor body, 2 is a power takeoff shaft, 5 is a blower device, 6 is a transmission device, 7 is a mounting frame, 12 is a rear wheel, 14 is a mower, 16 is a shooter, 20 is a blower, and 23 is a collector. , 25 are clutch shafts.

Claims (1)

[Scope of utility model registration request] 1. A lawn mower that is provided with a mower (14) below a tractor vehicle body (1) and that collects the grass mowed by the mower (14) through a shooter (16) to a collector (23) at the rear of the vehicle. The blower device 5 is detachably attached to the outside of the rear wheel 12 between the collector 23 and the rear wheel 12.
The blower device 5 is provided between the rear part of the vehicle body and the collector 23.
A power transmission device 6 for driving the vehicle is attached to a vehicle body so as to be laterally aligned with a mounting frame 7, and one end side of the power transmission device 6 is attached to a rear portion of a tractor vehicle body 1 by a power take-off shaft 2 projecting from a shaft. The clutch wheel 25 is driven to rotate, and the other end of the transmission 6 is used as a drive shaft to drive the blower 20
12 A mechanism for keeping the state in which the two shafts are separated from the power take-off shaft 2 by the clutch shaft 25 on one end side of the transmission device 6 and the two shafts approaching each other for power transmission state. The lawn mower is characterized in that it has a holding mechanism, and that the mounting frame 7 having the transmission 6 inside is detachably attached to the rear part of the tractor body 1 when the two shafts are kept apart from each other. Blower drive device.