JPH06225614A - Lawn mower - Google Patents

Abstract

PURPOSE:To provide a lawn mower to assuredly hold cut lawn into a grass collection container, so designed that the control section for the driving sections for both blower and mower is incorporated with a grass collection control circuit ensuring the mower to be driven only when the blower is in a rotary driving state. CONSTITUTION:A blower 22 is provided between a mower 12 and a grass collection container 34 and cut grass discharged from the mower 12 is put to suction into the container 34 and conveyed. A control section for both the blower and mower is incorporated with a grass collection control circuit ensuring the mower to be driven only when the blower is in a rotary driving state. Thus, such troubles as to clog cut lawn in a case containing the blower and/or a chute 18 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mowing device which is attached to the lower part of the abdomen of a tractor or the front part of a machine body to mow lawn and the like.

[0002]

2. Description of the Related Art In a lawn mower such as a front mower, a mower is movably connected to a front part of a traveling vehicle body, a grass container is rotatably supported on an upper part of a bonnet behind a seat, and a lateral side part of the bonnet. A blower is attached to this so that the grass discharged from the mower's grass outlet is sucked by this blower and sent into the grass collection container above the bonnet.

[0003]

By the way, in the case of such a conventional device, when only the mower is driven without driving the blower, the cut grass is clogged in the inlet portion of the blower, and the grass smoothly moves into the grass container. There was a problem that it could not be sent.

[0004]

The present invention has been proposed in view of the above problems, and the following technical means have been taken. That is, the mower 12, the blower 22, and the grass collection container 34 are provided, the mower 12 obtains rotational power from a power source to drive the cutting blade 16 to rotate, and the blower 22 exists between the mower 12 and the grass collection container 34. Collection container 3 for cutting grass discharged from 12
In the lawnmower configured to suck and convey to 4,
A control unit A for controlling the drive unit of the blower 22 and the mower 12 is provided, and this control unit A has a built-in grass collection control circuit capable of driving the mower 12 only when the blower 22 is in a rotational drive state. The lawn mowing device is characterized by that.

[0005]

Embodiments of the present invention will be described below based on the embodiments shown in the drawings. First, the structure will be explained as follows.
Is a front-wheel drive type traveling vehicle that has large-diameter front wheels 2 and 2 and small-diameter rear wheels 3 and 3, and normally drives by driving only the front wheels 2 and 2.

The rear wheels 3, 3 are steering wheels, and when the steering handle 4 is turned, the rear wheels 3, 3 are steered. 7 is a steering post provided at the front of the fuselage, 8
Is a seat, and 9 is a step, and is integrally formed with a fender 10 that covers the front wheels 2 and 2 above. A box-shaped bonnet 11 is provided at the rear of the seat 8, and an engine, a fuel tank, and the like (not shown) are housed in the bonnet 11. Vents are provided at the front and rear of the bonnet 11, and the outside air sucked from the front side is discharged from the rear vent of the bonnet 11 to cool the engine and the like.

Reference numeral 12 is a mower, and a link mechanism 13 is provided at the front of the machine body.
It is connected via the. This moa 12
Housing 15 having an opening on the lower surface and one side in the left-right lateral direction
And three cutting blades 16 arranged side by side in the lateral direction, and a cylindrical shooter 18 is connected to the right outlet of the housing 15 that is opened to discharge grass and grass. There is. The cutting blade 16 of the mower 12 is fixed to the upper portion of the housing 15 and is rotationally driven by the hydraulic motor 20.

The rear end of the shooter 18 is a blower 2 for suction.
2, the blower 22 is driven by a hydraulic motor 23. The hydraulic motor 20 on the side of the mower housing 15 is a front PTO shaft (not shown) provided in the front part of the traveling vehicle body 1.
The hydraulic motor 23 for the blower 22 is driven by the PTO drive unit 24 at the rear of the machine body and the transmission shaft 25 and the like on the right side of the machine body, which is mounted along the longitudinal direction. Is configured. 2 shows a hydraulic circuit diagram for driving these two hydraulic motors 20, 23. In FIG. 2, reference numeral 27 is a first valve for controlling the blower 22 for switching between two positions, and 28. Is a second valve for two-position switching for mower control, and reference numerals 29 and 30 are solenoids.

When the solenoid 29 is excited, the first valve 2
7, the blower 22 starts rotating, and when the solenoid 30 is excited, the second valve 28 switches and the cutting blade 1
6 is configured to rotate. In the figure, 31 is a hydraulic pump and 32 is a relief valve. Next, the configurations of the grass container 34 and its lifting mechanism 35 will be described. Grass container 3
4 has a box-like shape made of a thin plate, and its bottom plate 36 is inclined rearward. An opening 38 is formed on the upper right side of the grass container 34, and an upper end opening of a cylindrical body 40 connected to the discharge side of the blower 22 is superposed on the opening 38.

The lower part of the grass container 34 is a parallel link mechanism 42.
The parallel link mechanism 42 is supported by the lift cylinder-4 having one end connected to the airframe and the other end connected to the parallel link mechanism 42.
3, the whole grass collection container 34 is configured to be lifted, and the dumping cylinder-45 arranged at the rear end of the parallel link mechanism 42 causes the grass collection container 34 to rotate upward about a fulcrum 46. Is configured as follows.
Reference numeral 47 denotes a lid of the grass container 34. When the grass container 34 is rotated by the dump cylinder-45, the lid 47 is opened in association with the movement.

Reference numeral 50 is an air volume sensor installed inside the cylindrical body 40. When the hydraulic motor 23 is driven and the wind generated by the blower 22 reaches a certain level, the detection sensor 50 operates to close the contact. FIG. 4 is an electric circuit diagram of the control unit A for controlling the two hydraulic motors 20 and 23. In the circuit diagram, reference numeral 51 is a grass-collecting "on" switch that is pressed when starting grass collection, and 52 is "Off"
A switch, 53 is a blower “ON” switch which is pushed when turning the blower 22 alone, 54 is a blower “OFF” switch which is pushed when the rotation of the blower 22 is stopped, and 55 is when the cutting blade 16 of the mower 12 is rotated. Press the mower "on" switch,
Reference numeral 56 is a "off" switch for stopping. Again 5
Reference numerals 8 and 59 are relays capable of self-holding. These relays 58, 59 are configured so that once they are turned on, their contacts 58a, 59a conduct and close the circuit. 60 is a diode. In the same circuit,
The switches 51, 53 and 55 are normally open contacts, and the switches 54, 56 and 52 are normally closed contacts. FIG. 3 is a front view of the operation panel portion.

To explain the operation of the above example, first, when the grass cutting and grass collecting work is started, the grass collecting "ON" switch 51 is pushed. Then, only the first relay 58 is activated, the relay contact 58a is turned on, and the solenoid 29 is excited.
Therefore, the hydraulic motor 23 for driving the blower starts to rotate. When the rotation of the blower 22 exceeds a certain value, the air flow sensor 50 detects this and closes its contact,
The second relay-59 is activated. When the second relay 59 is operated, the relay contact 59a is closed, so that the solenoid 30 is excited and the hydraulic motor 20 for rotating the cutting blade 16 of the mower 12 is operated. That is, the blower 22 starts to rotate and then the cutting blade 16 of the mower 12 starts to rotate. When grass and grass are cut off by the cutting blade 16 of the mower 12, the cut grass and grass are sent into the grass container 34 by the wind generated by the blade 16 and the suction force of the blower 22, and the grass container 34 is full. The lawn mowing work is continued until. Then, when the grass cutting "cut" switch 52 is pressed to stop the grass collecting work, its contact point is opened, the two solenoids 29 and 30 are both demagnetized, and the rotation of the cutting blade 16 of the blower 22 and the mower 12 is stopped. .

When the rotating parts of the blower 22 and the mower 12 are driven for the purpose of inspection, the blower "ON" switch 5
3 or the mower "ON" switch 55 is operated separately.
In this case, the blower 22 can be turned independently by pressing the blower “ON” switch 53. However, when the cutting blade 16 of the mower 12 is rotated, the blower 22 “ON” switch 53 is pressed and then the mower “ON” is pressed. The switch 55 must be turned on.

As described above, in this embodiment, the cutting blade 16 of the mower 12 cannot be rotated unless the blower 22 is driven, and the cutting blade 16 is rotating so that the grass collecting work can be performed. Even if it is being carried out, if the grass or grass that has been mowed is jammed in the shooter 18 or the cylinder 40 and the transportation of the grass or grass is not smooth, the air flow sensor 50 operates and the cutting blade 16 of the mower 12 is operated. Since the rotation of No. 1 is stopped, there is a feature that it is safe and handling and operability are improved.

Next, the safety mechanism of the blower 22 will be described with reference to FIGS. The same reference numerals are given to those having the same configurations as those of the previous embodiments, and new reference numerals are given to those having a different configuration. The features of this safety mechanism are:
The point is that the blower 22 can be rotated only when the grass container 34 is in a fixed position. The fixed position of the grass container 34 is a lift cylinder-43 and a dump cylinder-4.
5 is shortened together and the grass container 34 is stored in the upper part of the bonnet 11 in close proximity to each other. A limit switch 61 is installed on the vertical frame 60 at the rear of the machine body, and the lower link 42a of the parallel link mechanism 42 is turned on when the limit switch 61 is pressed. Bottom plate 3 of grass container 34
A limit switch 62 is attached to 6 and the upper link 42b of the parallel link mechanism 42 pushes the limit switch 62 to turn it on. Therefore, the grass container 3
When 4 is in the predetermined position, both limit switches 61 and 62 are turned on, and at this time, the blower is turned on.
When the switch 63 is operated, the relay 65 is actuated, and its contact 65a is held in the self-holding state and closed, and the blower 2
The solenoid 67 of the hydraulic motor 66 that rotates 2 is excited. Therefore, the blower 22 starts to rotate. If blower 22 is operating, lift “ON” switch 68
Alternatively, even if the dump "ON" switch 69 is turned ON, the grass contact container 34 cannot be lifted or dumped because the relay contact 65b is in the OFF state. On the contrary, when the blower 22 is in the rotation stopped state and the lift “ON” switch 68 or the dump “ON” switch 69 is pressed at this time, the grass container 34 is raised or dumped. Blower "ON" switch 6 trying to rotate blower 22
Even if 3 is pressed, the blower 22 cannot be rotated because at least one of the limit switches 61 or 62 is OFF. Therefore, there is no risk of grass or stones jumping out from the opening at the tip of the tubular body 40, and there is no risk of erroneous operation, which is safe. Code 6
4 is a valve for controlling the blower, 70 is a lift valve, 71 is a dump valve, 72 and 73 are solenoids, 81 is a relay, 81a is its contact point, 82 is a relay,
82a is its contact point, 83 is a blower "off" switch, 84
Is a lift “off” switch, and 85 is a dump “off” switch.

Next, the control circuit of FIG. 8 will be described. In this device, the rotation / stop control of the blower 22 is controlled by another means instead of the limit switch used in the above device. That is, the lift cylinder-43 is the lift valve 70, and the dump cylinder-45 is the dump valve 71.
Made to control them by solenoids 7
2, 73 and relays 65, 81 and 82 are associated with each other as shown in FIG.

When the blower "ON" switch 63 is pressed when the lift cylinder 43 and the dump cylinder 45 are in the predetermined positions without being operated, the relay 65 is operated and the contact point 65a is closed to close the hydraulic mode. Ta 66 starts rotating. At this time, since the relays 81 and 82 are not operating, the contacts 81b and 82b maintain the conductive state, and the blower "ON" switch 63 is self-held in the ON state. At this time, the contact 65 is OFF, so the lift “ON” switch 6
8 or the dump "on" switch 69 is pressed, the circuit remains open and therefore both cylinders are inactive. Of course, when the rotation of the blower 22 is stopped, the lift cylinder-43 and the dump cylinder-45 can be extended. As described above, this device does not need a limit switch at all, and the rotation / stop control of the blower 22 can be performed only by the relay controlling the lift valve 70 and the dump valve 71.

[0018]

As described above, the present invention includes the mower 12, the blower 22, and the grass container 34. The mower 12 receives rotational power from the power source to drive the cutting blade 16 to rotate, and the blower 22 causes the mower 12 to rotate. In the lawn mowing device configured to suck and convey the cut grass discharged from the mower 12 to the grass collecting container 34 between the grass collecting container 34 and the grass collecting container 34, a control unit A for controlling the drive unit of the blower 22 and the mower 12 is provided. Since the control section A is a lawnmower characterized by incorporating a grass collection control circuit capable of driving the mower 12 only when the blower 22 is in a rotational drive state, the blower 22 is accommodated. There is no problem that the grass cut by the mower 12 is clogged inside the case or shooter, and the cut grass is collected in the grass container 3
It can be reliably and satisfactorily conveyed into the inside.

[Brief description of drawings]

FIG. 1 is a side view of the entire lawnmower.

FIG. 2 is a hydraulic circuit diagram.

FIG. 3 is a front view of an operation unit.

FIG. 4 is a control circuit diagram.

FIG. 5 is a side view of the lawnmower.

FIG. 6 is a hydraulic circuit diagram.

FIG. 7 is a control circuit diagram.

FIG. 8 is a control circuit diagram.

[Explanation of symbols]

 1 Running Vehicle 2 Front Wheel 3 Rear Wheel 4 Steering Handle 7 Steering Post 9 Step 10 Fender 12 Mower 13 Link Mechanism 18 Shooter 22 Blower 34 Grass Container

Claims (1)

[Claims] 1. A mower 12, a blower 22, and a grass container 34 are provided, the mower 12 obtains rotational power from a power source to drive a cutting blade 16 to rotate, and the blower 22 connects the mower 12 and the grass container 34. Grass container 3 for collecting grass cut from the mower 12 in between
In the lawnmower configured to suck and convey to 4,
A control unit A for controlling the drive unit of the blower 22 and the mower 12 is provided, and this control unit A has a built-in grass collection control circuit capable of driving the mower 12 only when the blower 22 is in a rotational drive state. A lawn mowing device characterized in that