JP3516868B2 - lawn mower - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawnmower in which a mower is connected to a front portion of a riding traveling vehicle body and a grass container for collecting grass clippings at the mower is provided above a rear portion of the vehicle body.

[0002]

2. Description of the Related Art As a lawn mower having the above structure, for example, as disclosed in Japanese Patent Laid-Open No. 9-252624,
The grass container is supported at the tip of the bending and extending link mechanism of the four-link structure, and the grass container is moved to the retracted position at the upper part of the machine and the overhang position at the upper rear of the machine with the bending and expanding operation of the bending and linking mechanism. It is known that the grass container is configured so as to be movable substantially in parallel, and the grass container can be configured to be capable of dump swinging in the discharge direction with respect to the lifting link mechanism.

[0003]

In the lawnmower having the above-mentioned structure, the grass container is dumped while being kept at a lower position above the rear part of the machine body, or the grass container is moved to an arbitrary height above the rear part of the machine body. It has the advantage that it can be hung and dumped and the discharge height position can be arbitrarily selected.However, when the flexion / extension link mechanism is bent and lowered, the flexion / extension link mechanism can be used. Since the working load is supported only by the link base of the link mechanism itself to the fuselage side, large stress acts vertically or laterally on the link base of the flexion / extension link mechanism due to rocking or impact during running. It was easy to cause deformation and damage of the member at each fulcrum. Further, in order to prevent such a problem, if the bending / expanding link mechanism is configured with a thick or large-walled pipe material, or the shaft diameter of each fulcrum part is increased to increase the rigidity, the link mechanism weight is reduced. This caused an increase in size or an increase in weight.

The present invention has been made paying attention to such a point, and its main object is to solve the above-mentioned problems found in the conventional structure by improving the bending and stretching link mechanism.

[0005]

[Means for Solving the Problems] [Structure, Action and Effect of the Invention According to Claim 1]

(Structure) In the lawnmower of the invention according to claim 1, a mower is connected to the front part of the riding traveling machine body, and a grass collection container for collecting the cut grass from the mower is provided in the traveling machine body. It is supported at the tip of the bending / extending link mechanism arranged in the rear part, and the grass container is moved substantially parallel to the retracted position on the rear part of the machine body and the overhang position at the rear upper part of the machine body along with the bending / extending operation of the bending / expansion link mechanism. with movably configured, in the discharge direction in the dump swingably configured lawnmower are against bending and stretching the link mechanism the grass catcher, the bending phosphorus
The rear end is pivotally connected to the fuselage side and
The first link that is driven and rocked to the front and the forward play of the first link.
The front end is pivotally connected to the end and the collecting end is connected to the rear end.
The second link with the grass container connected so that it can be dumped, and the second
The free end of the linkage arm extending from the front end of the
Is installed over the entire length of the first link
The bending / extending link mechanism, which is composed of
In a retracted state in which the
If the whole structure is constructed so that it is tilted backward and tilted
In this case, the bending / retracting movement in the retracted backward tilted posture
The front free end of the link mechanism is received and supported from below.
In addition, the receiving part in the downward tilted posture that restrains lateral shake
The material is provided on the side of the machine body.

(Operation) According to the above construction, during the traveling traveling or the working traveling, the bending / extending link mechanism is bent to hold the grass container at the retracted position. In this case, the bending / free end portion of the bending / extending link mechanism is bent. Is supported by the receiving member on the body side. Here, even if vibrations and vibrations during running act on the bending and stretching link mechanism and the grass container in the vertical direction or the lateral direction, the bending and stretching link mechanism is supported by the connecting base portion and the bending free end portion on the tip side. . The bending and stretching link mechanism is extended when discharging the collected turf.It is in a stopped state or it moves at an extremely low speed to change the discharging position on the ground. Does not occur, and the connecting base of the bending and stretching link mechanism is not forced.

(Effect) Therefore, according to the first aspect of the invention, the coupling base portion and the bending free end portion are received and supported on the machine body side in the retracted position without particularly increasing the rigidity of the bending and stretching link mechanism itself and each fulcrum portion. As a result, a large load can be sufficiently coped with, and the desired function can be sufficiently exerted while suppressing an increase in the size of the bending and stretching link mechanism and an increase in weight.

[Structure, Action and Effect of the Invention According to Claim 2]

(Structure) The lawnmower according to the invention according to claim 2 is
In the invention, the bending and stretching link mechanism bends and descends.
In the retracted state, the second link is parallel to the upper surface of the first link.
It is constructed so that it can be directly placed on and supported by.

(Operation) According to the above configuration, in the state where the bending and stretching link mechanism is bent to hold the grass container at the storage position, the second link is placed and supported in parallel on the upper surface of the first link, and the first link is supported. The load related to (1) is distributed in the longitudinal direction and is received and supported by the first link, and as described above, the bending and stretching link mechanism itself receives and supports the connecting base portion and the bending free end portion on the tip side on the body side. become.

(Effect) Therefore, according to the invention of claim 2, since the bending / extending link mechanism in the retracted position can be surely supported on the machine body side without applying a large load locally, the grass container can be surely supported. Even if the capacity is increased, the bending and stretching link mechanism can be made compact and lightweight, and the above effect of claim 1 can be promoted.

[0013]

1 is a side view of a lawnmower according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a schematic plan view thereof. This lawnmower includes a front wheel 1 as a main propulsion wheel, a rear wheel 2 as a steering wheel, a steering handle 3 for steering the rear wheel 2, a driver's seat 4, and a rear wheel steering wheel 4 equipped with an engine 5. The mower M is connected to the front portion of the wheel drive type traveling body A, and the grass collecting container 6 for collecting the cut grass from the mower M is arranged above the rear portion of the traveling body A.

In the mower M, three reel type cutter units 7 arranged in parallel in a triangular shape in plan view are rotatably suspended on a lift arm 8 which is independently rocked up and down by a hydraulic cylinder (not shown). As shown in FIG. 4, as the lift arms 8 swing upward, the central cutter unit 7 is lifted and lifted in a horizontal posture, and the left and right cutter units 7 are lifted. It is adapted to be swung up and stored by abutting against the fixedly arranged lift regulation roller 9.

A grass collecting cover 10 is attached to each cutter unit 7, and a bellows-made grass collecting duct 11 extending from each grass collecting cover 10 is joined and connected to a central duct 12 fixed to the front end of the machine body. A large-diameter bellows-made transport duct 13 extending from the central duct 12 to the right rear is connected to a centrifugal blower 14 arranged on the right side of the traveling body A, and is cut by each cutter unit 7. The blower 14 is configured to suck the cut grass.

As shown in FIG. 10, the blower 14 is
An impeller 16 rotatably supported around the front-rear axis in the casing 15 is rotationally driven by engine power taken out from the rear of the machine body, and cut grass sucked from an entrance 15a formed in the front surface of the casing 15 is removed from the casing 15. It is configured to discharge from an outlet 15b formed upward on the outer periphery, and the outlet 15b and the supply port 6a formed on the right side surface of the grass collection container 6 are provided on the supply duct 17 made of bellows and on the container side. They are connected to each other via an inlet duct 18 made of sheet metal.

In the impeller 16, each blade 16a is formed in a curved shape that is convexly curved with respect to the rotation direction, and auxiliary blades 19 are attached to each blade 16a so that suction and discharge can be performed efficiently with less noise. It has a structured structure.

The grass container 6 is constructed so that it can be discharged at an arbitrary height by the structure described below. That is, the base frame 2 is provided at the rear of the traveling body A.
1 is arranged, and the grass container 6 is attached so as to be able to move up and down via a pair of left and right bending and linking mechanisms 22 provided on the base frame 21. The base frame 21 is
It is composed of a square pipe bent in a U shape surrounding the engine bonnet 23 from the left and right and from the rear,
The front end of the base frame 21 is connected to the lower left and right sides of an arch-shaped protection frame 25 standing upright from the body frame 24 at the rear part of the driver seat 4, and the rear end of the base frame 21 is connected to the body frame 24. It is supported via the frame 26.

The bending / stretching link mechanism 22 includes brackets 27 projecting from the left and right of the rear portion of the base frame 21.
A first link 28 having a rear end pivotally connected about a fulcrum a so as to be vertically swingable, and a second end having a free end pivotally connected about a fulcrum b at one end to a free end. Link 29
And the linking arm 29 extending from the front end of the second link 29.
and a bracket 27 which is pivotally connected to the bracket 27 at a fulcrum c and a fulcrum d to form a four-link relationship substantially parallel to the first link 28. The flexion / extension link mechanism 22 is flexed / extended by the expansion / contraction operation of the hydraulic cylinder 31 that is installed over 27 and the first link 28.

At the rear end of the second link 29, a connecting member 32 extending from the lower rear end of the grass container 6 is pivotally connected around a fulcrum e so as to be able to swing.
By the expansion and contraction operation of the hydraulic cylinder 33 that is laid across the second link 29 and the connecting member 32, the grass container 6 is driven and oscillated into a substantially horizontal grass collecting posture and an upward dumping dumping posture. It is supposed to be moved.

The grass container 6 is formed by resin molding in a box shape in which the entire rear end is opened as a discharge port 6b for the collected grass, and the discharge port 6b is centered on the fulcrum f at the upper part. It is adapted to be opened and closed by a lid 34 attached so as to be vertically swingable. In addition, when the restraint link 35 is laid across the lid 34 and the second link 29, and the grass container 6 is swung up and swung in the dump posture,
The lid 34 is configured to swing open in conjunction with this. Although not shown, inside the lid 34, there is formed an exhaust path for extracting the cut grass transport air sent into the container downward through the net.

In the retracted state in which the bending / extending link mechanism 22 is bent and lowered, the second link is formed on the upper surface of the first link 28.
Each fulcrum portion is configured so that the links 29 are placed and supported in parallel, and the left and right near the front end of the base frame 21 swing forward to the retracted position. An L-shaped receiving member 36 is provided for receiving the respective link arms 29a, which are end portions, from below and for preventing the left and right link arms 29a from sliding laterally outward.

The lower part of the grass container 6 at the storage position on the front end side is placed and supported on the L-shaped container support members 37 provided on the left and right second links 29 to collect and collect the grass container 6. The weight of the cut grass is not limited to the fulcrum e, but the container support member 3
7 is also configured to be shared and supported.

The inlet duct 18 provided on the right side surface of the grass container 6 is connected to the side surface of the container and is also supported by the support arm 38 extending from the connecting member 32 so that the inlet duct 18 is collected. It is firmly integrated with the container 6. In addition, the outlet member 17 a of the supply duct 17 extending upward from the blower 14 is attached to the base frame 21.
It is fixedly held by a support arm 39 which stands upright.

Further, a peep window 40 with a transparent plate is formed at a position near the upper right side of the front surface of the grass collection container 6, and the condition of collecting grass clippings in the container can be monitored through the peek window 40. The supply state of the cut grass at the supply port 6a can be monitored by also seeing through the supply port 6a on the right side surface of the container.

The lawnmower according to the present invention is constructed as described above. As shown in FIGS. 1 and 5, the bending / extending link mechanism 22 is bent to lower the grass container 6 to the storage position. And in a substantially horizontal grass-collecting position, supply duct 1
The outlet member 17a of 7 and the inlet duct 18 of the grass container 6 are fitted and connected to each other, and in this state, the lawn grass is cut and traveled, and the cut grass is collected and wind blown by the blower 14 to the grass container 6. I will send it in.

When the grass collection container 6 is full, the grass collection container 6 is moved to a predetermined discharge position, and the grass collection container 6 is placed in a dumping position to discharge the collected grass. In this case, as shown in FIG. 6, by dumping the grass container 6 without extending the flexion / extension link mechanism 22, discharge can be performed at a low position, and as shown in FIG. Can be extended halfway to dump the grass collection container 6, or as shown in FIG. 8, the bending / extending link mechanism 22 can be extended to the maximum extent to dump the grass collection container 6 from any height. Can be discharged.

When dumping the grass collection container 6, the inlet duct 18 integrated with the grass collection container 6 comes out and separates from the outlet member 17a of the supply duct 17 fixed to the body side, and the grass collection container 6 is stored. When returned to the position, the inlet duct 18 is fitted and connected to the outlet member 17a of the supply duct 17, and the blower 1
4 and the grass container 6 are brought into communication again. Here, the fitting end portion of the outlet member 17a is formed in a tapered shape so that the inlet duct 18 can be smoothly fitted into the outlet member 17a.

[Brief description of drawings]

[Figure 1] Overall side view of the lawn mower

FIG. 2 is a front view of the airframe with the mower lowered.

FIG. 3 is a schematic plan view of the lawn mower.

FIG. 4 is a front view of the airframe with the mower raised.

FIG. 5 is a side view showing a grass collecting portion in a grass collecting action state.

FIG. 6 is a side view showing the grass collection part in a state where the grass collection container is dumped at a low position.

FIG. 7 is a side view showing the grass collection part in a state where the grass collection container is raised to an intermediate height.

FIG. 8 is a side view showing the grass collection part in a state where the grass collection container is dumped at the maximum height position.

FIG. 9 is a partially cutaway front view showing the grass container in a state where the grass container is lowered and stored in a grass collecting state.

FIG. 10 (a) Vertical side view of blower (B) Vertical front view of blower

[Explanation of symbols]

6 grass container 6a Supply port 22 Bending and stretching link mechanism 28 First Link 29 Second Link 29a Linking arm 30 linked links 36 Receiver 40 Peep window A traveling aircraft M Moore

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyuki Ezaki 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Co., Ltd. at Sakai Factory (72) Inventor, Kazuyoshi Togoshi, 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Teruo Shimamura 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Matsuo Tachibana 64 Ishizu-kitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Shubara Fujiwara, 64, Ishizukita-machi, Sakai City, Osaka Prefecture (56) References Japanese Patent Laid-Open No. 5-15229 (JP, A) Japanese Patent Laid-Open No. 62-180900 (JP, A) 58-87800 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01D 34/42-34/44

Claims (2)

(57) [Claims] 1. A mower is connected to a front portion of a riding traveling vehicle, and a grass container for collecting grass clippings from the mower is supported by a front end portion of a bending and stretching link mechanism provided at a rear portion of the traveling vehicle. With the bending and stretching operation of the bending and stretching link mechanism, the grass container is configured to be movable in a substantially parallel manner between a storage position on the rear part of the machine body and an overhang position on the upper rear part of the machine body, and the grass container is bent and expanded. In a lawnmower configured such that a dump swing can be performed in a discharge direction with respect to a link mechanism, a rear end of the bending and stretching link mechanism is pivotally connected to a body side.
Together with the first link that is driven to swing up and down, and the first link.
The front end is pivotally connected to the front free end of the
A second phosphorus having the grass container connected to the end in a dumpable manner.
And the free movement of the linkage arm extending from the front end of the second link.
It is installed over the edge and the body side, and with respect to the first link
The bending and stretching link mechanism is bent and lowered to a stored state.
And the bending and stretching link mechanism as a whole is in a downwardly tilted posture.
It is configured like this, and the case of this rear downward tilt posture is
Receives the forward free end of the bending and stretching link mechanism in the received state from below.
While supporting the anti-shake, the lower back that restricts lateral shake
It is characterized in that it is equipped with a receiving member in a tilted posture on the aircraft side
And lawn mower. 2. The bending and stretching link mechanism bends and descends.
In the retracted state, the second link is parallel to the top surface of the first link.
The lawnmower according to claim 1, wherein the lawn mower is configured to be directly placed and supported .