JP2000050716A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mower equipped with a mowing mechanism at the bottom of a traveling body and a collected grass container at the rear of the body capable of smoothly supplying the mowed grass to the grass container through a duct without complicating the rear wheel driving mechanism. SOLUTION: The mower is configured to supply the mowed grass from the mowing mechanism 4 to the grass container 5 through a duct 22 located between the left and right rear wheels 2, the bottom of the duct 22 is shaped as a chevron setting the upper corresponding position of a driving shaft 100b to the rear wheels 2 as the top, the front bottom face Sf of the duct from the top is sloped to down forward, and the rear bottom face Sr of the duct from the top is sloped to down backward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower equipped with a mower at the lower abdomen of a running vehicle body and a grass container disposed at a rear portion of the vehicle body.

[0002]

2. Description of the Related Art As the above-mentioned mowing machine, there is known a mowing machine configured to supply mowing grass from a mower mounted on a lower abdomen of a traveling vehicle body to the grass collecting container through a duct disposed between right and left rear wheels. At this time, a duct having a substantially constant cross-sectional area over the entire length is used.

[0003] The mower having the above construction has the advantage that the width of the entire vehicle body can be reduced as compared with the case where the duct is arranged laterally outside the traveling vehicle body. However, it is necessary to pass the duct between the left and right rear wheels. Therefore, the cross-sectional area of the duct cannot be arbitrarily increased, and as a result, it is difficult to enhance the discharge performance of the cut grass. Therefore, as a means for solving such a problem, the transmission case is extended downward from the left and right sides of the transmission case, and the rear wheels are pivotally supported outside the lower end of each transmission case. It is also considered to form a high space above and below which is not laid horizontally, and to pass a duct having a large cross-sectional area here.

[0004]

In the above-described configuration in which a large duct insertion space is formed between the left and right rear wheels, a general case in which the left and right rear wheels are directly supported on the transmission case is provided. There is a problem that the rear wheel drive structure becomes complicated as compared with the vehicle body structure, and the transmission case is located at a high position, so that the vehicle center of gravity becomes high. Also, when the left and right transmission cases for rear wheel drive are extended downward like a high foot,
The entire rear wheel support structure is likely to be insufficient in strength, and a reinforcing means such as increasing the thickness of the case or attaching a reinforcing member is also required, thereby increasing the weight of the vehicle body.

In a mowing machine equipped with a grass container, when the grass container becomes full, the harvested grass is discharged by swinging and opening the grass container.
When the grass container is opened separately from the duct, the rear end of the duct is exposed toward the rear of the vehicle body. Therefore, if the mower is inadvertently driven to rotate while the grass container is open, the mowing grass and dust adhering to the inside of the mower will be sent into the duct, and from the opened rear end to the rear of the vehicle body. In some cases, it was scattered and the environment around the discharge work site and its surroundings was deteriorated.

The present invention has been made in view of such a point, and in a structure in which a duct is passed between left and right rear wheels, the cut grass is ducted without complicating the rear wheel drive structure. The main purpose is to be able to smoothly feed the grass into the grass container via the, and even if the mower is inadvertently driven with the grass container open, the cut grass will It is another object of the present invention to prevent the surrounding environment from being deteriorated due to being scattered.

[0007]

Means for Solving the Problems [Structure, operation and effect of the invention according to claim 1]

According to a first aspect of the present invention, there is provided a mower equipped with a mower on a lower abdomen of a traveling vehicle body and a grass collecting container disposed at a rear portion of the vehicle body. It is configured to supply the grass container through a duct disposed between the wheels, and the bottom surface of the duct is formed in a mountain shape having a vertex at a position corresponding to an upper portion of a transmission shaft to a rear wheel, and a front portion is formed ahead of the vertex. , And the bottom surface of the rear duct behind the apex is inclined backward and downward.

(Operation) According to the above configuration, even if the transmission shaft to the rear wheel is suspended, the duct can be arranged so as to bypass above the transmission shaft. The cross-sectional area becomes the smallest at the position corresponding to the upper part, but it becomes large before and after that, the whole duct becomes like a Venturi tube, the flow velocity of the conveying wind is increased in the place where the cross-sectional area is small, and the cut grass has this fast flow velocity It is sent to the grass collection container on the transport wind. In addition, the wind speed decreases after the top of the chevron, but since the bottom of the duct slopes down and the cross-sectional area gradually increases, the cut grass that has passed beyond the chevron is sent without stagnation and the end of the duct is large. It is sent to the grass collection container through the opening.

(Effect) Therefore, according to the first aspect of the present invention, the duct passing between the left and right rear wheels is formed in a venturi shape with a mountain bottom, so that the cut grass can be smooth even if the minimum cross-sectional area is small. Can be configured as a duct that allows the air to pass through. With a simple structure, it has become possible to efficiently send cut grass into the grass collection container at the rear of the vehicle.

[Structure, operation and effect of the invention according to claim 2]

(Structure) In the mower according to the second aspect of the present invention, in the first aspect of the present invention, the bottom plate on the bottom surface of the front duct and the bottom plate on the bottom surface of the rear duct can be lifted rearward and upward, respectively. .

(Operation) According to the above configuration, when the grass collecting container is removed from the rear end of the duct and opened, the bottom plate on the bottom surface of the front duct and the bottom plate on the bottom surface of the rear duct are lifted rearward and upward, so that the duct is opened. Can be blocked in two places, and the mower is driven or rotated by inertia while the grass collection container is open, and cut grass, earth and sand, dust, etc. remaining in the mower are sent into the duct. In addition, the front and rear bottom plates lifted rearward prevent the vehicle from flowing out to the rear of the vehicle body, are guided toward the ground from the open bottom surface, and are prevented from being scattered from the outlet of the duct.

(Effects) Therefore, according to the second aspect of the present invention, even if the grass collection container is removed from the duct and the duct is opened rearward in order to discharge the collected cut grass, etc., care should be taken. Thus, the mowing grass and the like sent from the mower can be guided without being scattered to the rear of the vehicle body, which is effective in preventing the work environment from being deteriorated at the place where the discharging operation is performed.

[Structure, operation and effect of the invention according to claim 3]

(Structure) According to a third aspect of the present invention, in the second aspect, the grass container is configured to be liftable to a discharge position, and the bottom plate is interlocked with the lifting operation of the grass container. Is configured to be lifted.

(Action) According to the above configuration, when the grass collection container is full of the harvested cut grass, the grass collection container is lifted and opened and discharged. When detached from the end, the bottom plate at the bottom of the duct is automatically raised in conjunction with this, and the conveyed goods such as cut grass, gravel, dust, etc. sent from the mower are scattered behind the car body Is restrained by the raised bottom plate.

(Effect) Therefore, according to the third aspect of the invention, the state in which the conveyed objects are prevented from being scattered and scattered by the bottom surface of the duct is automatically displayed when necessary, and can be properly operated without forgetting to lift the bottom plate. .

[Structure, operation and effect of the invention according to claim 4]

(Structure) The invention according to claim 4 is the invention according to claim 2 or 3, wherein the bottom plate on the bottom surface of the front duct and the bottom plate on the bottom surface of the rear duct are lifted and operated in conjunction with each other. The lifting of the bottom plate on the bottom surface of the rear duct precedes the lifting of the bottom plate on the bottom surface of the front duct.

(Operation) According to the above configuration, when the bottom plate is lifted while the cut grass from the mower is being conveyed, the bottom plate on the bottom surface of the rear duct is first lifted, so that the rear half of the duct is reached. The spread of the articles is suppressed, the articles at the rear of the duct are pushed into the container, and the bottom plate at the bottom of the front duct is lifted, so that the following articles are received.

By the way, if the lifting of the bottom plate of the bottom surface of the front duct precedes the lifting of the bottom plate of the bottom surface of the rear duct, even when the bottom plate of the bottom surface of the front duct is lifted, it has already passed over this bottom plate and The transported material that has reached the latter half will exit the duct outlet without being blocked. Also, if you lift the bottom plate on the bottom of the front duct and the bottom plate on the bottom of the rear duct at the same time,
Until lifting of the bottom plate is completed, the transported object is sent backward and scatters, making it difficult to quickly prevent the scatter.

(Effects) Therefore, according to the invention of claim 4, by giving a reasonable time difference between the lifting of the front and rear bottom plates, the flow of the conveyed material can be quickly and accurately shut off, and the scattering is effectively prevented. Can be suppressed.

[Structure, operation and effect of the invention according to claim 5]

(Structure) In the invention according to claim 5, in the invention according to any one of claims 1 to 4, a clogging detecting means is provided at an upper portion near the angled bent portion of the duct.

(Operation) According to the above configuration, when the grass collection container is full, the cut grass is deposited in the duct, but at this time, the minimum cross-sectional area of the duct, that is, the upper portion near the chevron bent portion is used. Are most densely deposited, and by arranging the clogging detection means here, the fullness of the grass collection container can be reliably detected.

When mowing grass or wet grass, the clogging of the duct is apt to occur. In this case, the clogging tends to occur at the upper portion near the chevron, which is the minimum cross-sectional area of the duct. Detecting the blockage here is early detection of the blockage.

(Effects) Therefore, according to the invention of claim 5, since the fullness of the grass collection container can be reliably detected, the discharge operation can be efficiently performed in a collection state with no excess or shortage. Also, since clogging in the duct can be detected early,
It is possible to perform cleaning before the tight clogging state and quickly return to the mowing work, and to reduce the work stoppage time when clogging occurs, thereby improving the work efficiency.

[Structure, operation and effect of the invention according to claim 6]

(Structure) According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the rear end of the duct protrudes into the front portion of the grass collection container, and at the same time, An air vent is formed on the side.

(Operation) According to the above configuration, the cross-sectional area of the duct is gradually increased at the rear of the cut grass passage at the intermediate portion of the cut grass passage. In other words, the wind speed is maximized at the middle portion of the cut grass passage, and becomes gradually smaller behind. Therefore, in the front part of the grass collecting container into which the rear end of the duct enters, the transport wind easily flows to the side. Here, if there is an air vent on the side of the entry point of the duct, the transported air blown into the grass collecting container will also easily flow into this air vent, and the cut grass will be packed into the front of the grass collecting container. Easier to do.

(Effect) Therefore, according to the sixth aspect of the present invention, it is easy for the wind to be easily ventilated at the front of the grass collecting container, and the cut grass is efficiently packed and collected up to the front of the grass collecting container. can do.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an entire mower. The mower is provided with a mower 4 suspended from a lower abdomen of a traveling body 3 having a front wheel 1 and a rear wheel 2 so as to be able to move up and down, and a grass collecting container 5 for collecting cut grass is connected to a rear portion of the body. ing.

An engine 6 is mounted on a front part of the traveling vehicle body 3, and an output of the engine 6 is transmitted to a hydrostatic type continuously variable transmission (HST) 7 disposed at a rear part of the vehicle body. The gears are decelerated and transmitted to the differential device 9, from which the left and right differential transmission shafts 10a, 10
b is further decelerated by the left and right deceleration cases 11a and 11b, and the left and right axles 12a and 12b
It is transmitted to.

Here, the transmission case 8 is disposed so as to be deviated to the left side with respect to the traveling vehicle body 3, the left deceleration case 11a is directly connected to the side of the transmission case 8, and the right deceleration case 11b is connected to the transmission. The right differential transmission shafts 10a and 10b, the transmission case 8,
A large space is formed between the right deceleration case 11b and the right deceleration case 11b.

The mower 4 includes three blades 15a, 15b, and 15c that are driven to rotate about a vertical axis.
And P which is interlockingly connected to the engine 6 via a belt transmission mechanism 17.
The power of the TO shaft 18 is transmitted to the input case 20 on the deck 16 via the transmission shaft 19, and the central blade 15a is directly axially driven directly below the input case 20, and the central blade 15a and the left and right blades 15a are driven. Are wound and linked by the belt 21. Then, in plan view, the central blade 15a and the left blade 15b are rotated clockwise, and the right blade 15c is rotated counterclockwise, so that each of the blades 15a, 15b,
The cut grass conveyed by the wind action of 15c is deck 1
6 are collectively discharged from an outlet 16a1 formed at the rear part of the nozzle 6.

In the space formed on the right side of the lower part of the vehicle body, there is provided a duct 22 for guiding the cut grass carried out from the outlet 16a of the mower 4 to the grass collecting container 5. The duct 22 has a rectangular cross-sectional shape, the bottom surface thereof is formed in a mountain shape, and the top of the mountain shape is located near the upper part of the right differential transmission shaft 10b. Also,
The bottom surface of the duct 22 is constituted by a front duct bottom surface Sf inclined forward and downward and a rear duct bottom surface Sr inclined downward and backward from the top of the mountain shape.

A switch 23 is provided at a position above the peak of the duct 22 in the duct 22 as clogging detecting means for detecting that a pressure greater than a predetermined value is applied.

The grass collecting container 5 is formed of a ventilated container having a front end entirely open, and swings up and down on a support frame 25 erected at the rear end of the vehicle body frame 13 around an upper fulcrum a. It is connected as possible. The support frame 25 is provided with a wall surface 26 that closes the front end opening of the grass container 5 that has been rotated downward, and the rear end of the duct 22 projects into the center of the wall surface 26. Air vents 27 are formed on the left and right sides of the wall surface 26, and the transported air blown into the grass collecting container can easily flow into the air vents 27, so that the cut grass to the front of the grass collecting container 5 can be cut. Can be easily packed.

A support bracket 31 is provided at the lower left and right sides of the support frame 25 so as to be rotatable around a fulcrum b, and a hydraulic cylinder 32 is pivoted over the fulcrum bracket 31 and the upper front end of the grass container 5. As the hydraulic cylinder 32 contracts and the grass container 5 moves down, the container front end is brought into the grass harvesting work position supported and supported by the support frame 25, and the hydraulic cylinder 32 is extended and the grass container 5 is extended. Is swung up, so that the container front end is configured to be in a discharge posture opened downward.

A hook 33 for locking the container extends rearward from the fulcrum bracket 31, and a lock pin 34 with which the hook 33 is engaged from above is provided below the front end of the grass collection container 5. Provided. As described above, the hydraulic cylinder 32 further contracts in a state where the hydraulic cylinder 32 contracts and the front end of the grass collection container 5 is received by the support frame 25, so that the cylinder connecting point c of the fulcrum bracket 31 moves around the fulcrum b. The hook 33 is pivoted downward around the fulcrum b to engage with the lock pin 34, and the grass collecting container 5 is fixed (locked) to the grass collecting work posture. Further, when the hydraulic cylinder 32 starts the extension operation from this grass-collecting work posture, the cylinder connection point c of the fulcrum bracket 31 is pushed down around the fulcrum b by the extension reaction force of the initial operation, whereby the hook 33 becomes the fulcrum. Then, the grass collecting container 5 is pivoted upward around and is separated from the lock pin 34, the lock of the grass collecting container 5 is released, and the grass collecting container 5 is swung up and rotated with the subsequent extension operation of the hydraulic cylinder 32. .

A PTO clutch lever 42 is provided on the left side of the driver's seat 41 provided at the rear of the traveling vehicle body 3 so as to swing back and forth around a fulcrum d. The base fitting 42a of the PTO clutch lever 42 and the belt A tension clutch type PTO clutch 43 provided in the transmission mechanism 17 is connected to a wire, and when the PTO clutch lever 42 is pulled up, the PTO clutch 43 becomes “disengaged”.
The PTO clutch 43 is configured to be “engaged” when the O-clutch lever 42 falls forward.

An intermediate pivot link 44 attached to the support frame 25 so as to be pivotable about a fulcrum e;
A restraining pin 45 provided on a base fitting 42a of the clutch lever 42 is linked to a restraining link 47 having a long hole 46, and the intermediate rotation link 44 is linked to a front end upper portion of the grass collecting container 5 by a link 48. The rotation of the grass collection container 5 causes the PTO clutch lever 42 to be restrained.

That is, as shown in FIG. 6, when the PTO clutch lever 42 is in the clutch "disengaged" position, the pulling pin 45 of the base metal fitting 42a is located on the rear side, so that the grass collecting container 5 is swung up. The restraining link 47 freely moves back and forth with the rotation and the downward rotation. When the grass collection container 5 is in the grass collection work posture, the PTO clutch lever 42 is set.
Can be arbitrarily operated in the range between the clutch "off" position and the "on" position.

As shown in FIG. 4, when the PTO clutch lever 42 is in the clutch "engaged" position, the traction pin 45 is located near the rear end of the long hole 46 of the traction link 47, so that the PTO clutch 43 When the grass container 5 is swung up and rotated in the inserted state, the traction link 47 is moved forward by hydraulic driving force, and the traction pin 45 is brought into contact with the rear end of the elongated hole 46, as shown in FIG. Then, the PTO clutch lever 42 is forcibly operated to the clutch "disengage" position.

With this configuration, when the grass collecting container 5 is swung up while the mower 4 is being driven to rotate, the mower 4 is automatically cut off and the open duct 2 is opened.
2 prevents the cut grass and dust from being scattered backward from the rear end.

Further, as shown in FIG.
Of the front duct Sf and the rear duct Sr of the chevron bottom
Are provided with bottom plates 51 and 52 which can be swung up and back around the rear fulcrums f and g, respectively. Here, a linking arm 53a that swings integrally with the bottom plate 52 of the rear duct bottom surface Sr and a front extension portion of the fulcrum bracket 31 are interlocked and linked via a link link 53b, and the bottom plate of the rear duct bottom surface Sr. 52 and front duct bottom S
The bottom plate 51 of FIG. f is interlockingly connected via a link link 54, and the initial operation in which the grass container 5 is swung up and rotated, that is, the fulcrum bracket 31 is rotated counterclockwise around the fulcrum b. In conjunction with the unlocking operation, the bottom plate 52 of the rear duct bottom surface Sr is swung up and swinging rearward and upward, and in conjunction with this, the bottom plate 51 of the front duct bottom surface Sf is swung up and swinging rearward and upward, and the duct 22 is swung upward. Is prevented from being opened rearward. Therefore, even if the grass collection container 5 is subsequently opened, the cut grass and dust sent from the front of the duct 22 are prevented from being scattered rearward.

Here, the linking link 54 and the bottom plate 51 of the front duct bottom surface Sf are interlockingly connected via a long hole interchange 55, and the bottom plate 52 of the rear duct bottom surface Sr is swung up and swung to form a rear duct. After the cut grass on the bottom surface Sr is pushed into the container side, the bottom plate 51 of the front duct bottom surface Sf is swung up and rocked.

The bottom plate 52 of the rear duct bottom surface Sr
The bottom plate 51 of the front duct bottom surface Sf may be simultaneously swung up and rocked in conjunction with the opening operation of the grass collection container 5. Further, for simplification of the structure, only one of the bottom plates 51 and 52 may be lifted and swingable.

[Brief description of the drawings]

FIG. 1 is an overall side view of a mower.

FIG. 2 is a plan view of a mower.

FIG. 3 is a rear view of the vehicle body.

FIG. 4 is a side view showing a linked state of a clutch operating unit and a grass container opening / closing unit in a PTO clutch engaged state;

FIG. 5 is a side view of the grass container opening / closing unit showing an initial state in which the grass container is opened.

FIG. 6 is a side view of the grass container opening / closing section showing a state where the grass container is opened.

FIG. 7 is a longitudinal side view showing the opening operation stroke of the bottom surface of the duct.

FIG. 8 is a front view showing the entrance of the grass collection container.

[Explanation of symbols]

 Reference Signs List 2 rear wheel 3 traveling vehicle body 4 mower 5 grass collecting container 10a transmission shaft 22 duct 23 clogging detection means 27 air vent 51 bottom plate 52 bottom plate Sf front duct bottom surface Sr rear duct bottom surface

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masaki Hayashi 64, Ishizukitamachi, Sakai City, Osaka Prefecture Inside the Kubota Sakai Factory (72) Inventor Hiroshi Oshima 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Nobuyuki Yamashita 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Kazuaki Kurohara 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Invention Person Seiya Harada 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture (72) Inside the Kubota Sakai Works, Ltd. (72) Inventor Hiroshi Kawabata 64, Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside the Kubota Sakai Works, Ltd. (72) Inventor Shogo Murakawa Osaka 64 Ishizu-Kitacho, Sakai City Inside Kubota Sakai Factory, Ltd. (72) Inventor Yoshio Toyama 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Hiroki Nagai 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture, inside Kubota Sakai Works Co., Ltd. (72) Inventor Takashi Fujii 64, Ishizu-Kitamachi, Sakai City, Osaka Prefecture F-term in Kubota Sakai Works, Inc. (Reference) 2B083 BA18 EA15 FA05 FA06 FA11 FA16 FA17

Claims (6)

[Claims] 1. A mowing machine equipped with a mower at a lower abdomen of a traveling vehicle body and a grass collecting container disposed at a rear portion of the vehicle body, wherein the mowing grass from the mower is passed through a duct disposed between right and left rear wheels. It is configured to supply to the grass collection container, the bottom surface of the duct is formed in a mountain shape having a vertex at the position corresponding to the upper part of the transmission shaft to the rear wheel, and the front duct bottom in front of the vertex is inclined forward and downward. A mowing machine characterized in that the rear duct bottom surface behind the apex is inclined backward and downward. 2. The mowing machine according to claim 1, wherein the bottom plate of the bottom surface of the front duct and the bottom plate of the bottom surface of the rear duct can be lifted rearward and upward, respectively. 3. The mowing machine according to claim 2, wherein the grass container is configured to be liftable to a discharge position, and the bottom plate is lifted and operated in conjunction with a lifting and opening operation of the grass container. 4. A structure in which the bottom plate on the bottom surface of the front duct and the bottom plate on the bottom surface of the rear duct are lifted and operated in conjunction with each other, and the lifting of the bottom plate on the bottom surface of the rear duct precedes the lifting of the bottom plate on the bottom surface of the front duct. The mower according to claim 2 or 3, wherein the mower is configured to perform the following. 5. The mowing machine according to claim 1, wherein a clogging detecting means is provided at an upper portion of the duct near the angled portion. 6. The airbag according to claim 1, wherein a rear end of the duct projects into a front portion of the grass collecting container, and an air vent portion is formed on a side portion of the projecting portion. Mower.