JP2003189718A - Weeding structure of working machine - Google Patents

Abstract

(57) [Problem] To prevent the working environment from deteriorating due to dust discharged from a large number of exhaust holes formed in a grass collection container. SOLUTION: At the rear part of the traveling body 1, a grass collecting container 32 for receiving the grass cut guided by the grass collecting duct 31 mounted on the traveling body 1 is equipped, and the grass is collected to the grass collecting container 32. In the grass collecting structure of a working machine having a large number of exhaust holes 53 for discharging the conveying wind conveyed toward the outside of the grass collecting container, the flow path 55 of the conveying wind discharged from the exhaust holes 53 is connected to the grass collecting container 32. And a wind guide case 56 that can be mounted around the grass collection container 32 in a state formed between the wind guide case 32 and the lower end of one of the left and right lateral side walls 60 and the rear wall 61 in the wind guide case 56. Alternatively, an exhaust port 70 for discharging the carrier air to the outside of the air guide case is formed at the lower end of all of them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is equipped with a grass container for receiving cut grass guided by a grass collecting duct mounted on the running machine at the rear of the running machine, and the grass collecting container is provided with the above-mentioned cut grass. The present invention relates to a grass collecting structure for a working machine in which a large number of exhaust holes are formed to discharge the air conveyed toward the grass collecting container to the outside of the grass collecting container.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned grass collecting structure of a working machine, the carrier air flowing into the grass collecting container together with the cut grass is discharged to the outside of the grass collecting container through a large number of exhaust holes formed in the grass collecting container. By discharging it, we can smoothly collect grass in the grass container.

[0003]

However, according to the above-mentioned prior art, when a large amount of dust is conveyed with the cutting grass by the conveying wind, the large amount of dust is discharged from the large number of exhaust holes formed in the grass container. Since it is discharged together with the transport wind and scattered as it is into the atmosphere, dust discharged from multiple exhaust holes reaches the operating part and deteriorates the working environment, depending on the direction of travel and wind direction. Was likely to occur.

An object of the present invention is to prevent deterioration of working environment due to dust discharged from a large number of exhaust holes formed in a grass container.

[0005]

[Means for Solving the Problems] [Structure] In order to achieve the above-mentioned object, in the invention according to claim 1 of the present invention, the rear part of the traveling machine body is guided by a grass collecting duct mounted on the traveling machine body. Equipped with a grass collecting container for receiving the cut grass, and a plurality of exhaust holes are formed in the grass collecting container for discharging the transport air for carrying the cut grass toward the grass collecting container to the outside of the grass collecting container. In a grass collecting structure of a machine, an air guide case is provided which can be attached to the grass collecting container so as to surround the grass collecting container so as to form a flow path of the transport air discharged from the exhaust hole between the grass collecting container and the grass collecting container. At the same time, an exhaust port is formed at the lower end of any one of the left and right side walls and the rear wall of the air guide case or at the lower end of all of the left and right side walls and the rear wall to exhaust the carrier air to the outside of the air guide case.

[Operation] According to the invention described in claim 1, when the wind guide case is attached to the grass container so as to surround it, the carrier wind that has flowed into the grass container together with the grass is collected from a large number of exhaust holes. After flowing out of the container, it flows through the flow path formed between the grass collection container and the wind guide case, and the wind guides from the exhaust ports formed on the left and right lateral side walls of the wind guide case and the lower end of the rear wall. It will come out of the case.

As a result, even when a large amount of dust is carried along with the cutting wind along with the carrying wind, the large amount of dust is discharged along with the carrying wind from a large number of exhaust holes and then flows down the flow path. Since it is discharged into the atmosphere from the lower exhaust port, compared with the case where dust is discharged into the atmosphere from a large number of exhaust holes, the discharged dust reaches the operating part and deteriorates the work environment. It becomes possible to effectively suppress the occurrence of such a problem.

Further, in the case where the transport air is directly discharged from the exhaust port of the wind guiding case through the flow path between the grass collecting container and the wind guiding case, into the atmosphere through a large number of exhaust holes of the grass collecting container. Since it is discharged into the atmosphere as smoothly as above, there is no adverse effect on the grass collection in the grass container.

Furthermore, since the transport wind flows down the flow path between the grass collection container and the wind guide case, the transport wind also has a downward directivity inside the grass collection container, so that the grass collection is performed. Since the cutting of grass and dust in the container is suppressed, the outflow of dust from each exhaust hole can be suppressed while the outflow of the carrier air can be performed more smoothly. It is possible to more effectively suppress the deterioration of the work environment due to the discharged dust and to more efficiently collect grass in the grass container.

Moreover, if the wind guide case is effectively used as a reinforcing member for the grass collection container, the weight of the grass collection container can be reduced without lowering the strength.

[Effect] Therefore, while making it possible to reduce the weight of the entire grass-collecting structure without lowering the strength, it is possible to reduce the working environment caused by the dust discharged from the numerous exhaust holes formed in the grass-collecting container. It is possible to effectively prevent the deterioration and improve the efficiency of grass collection.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, the air guide case is made of a resin material.

[Operation] According to the second aspect of the present invention, the wind guide case can be made lighter than the case where the wind guide case is made of a sheet metal material, and the wind guide case can be easily attached to and detached from the grass container. .

[Effect] Therefore, it has become possible to reduce the weight of the air guide case and improve the workability of attaching and detaching the air guide case.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire side surface of a mower, which is a pair of left and right caster type rolling wheels 2 that function as front wheels provided in the front part of a traveling body 1.
And a pair of left and right drive wheels 3 functioning as rear wheels provided in the rear part of the traveling machine body 1, a mower 4 is provided so as to be vertically movable, and is configured in a mid-mount form.

As shown in FIGS. 1 to 4, the traveling machine body 1 is arranged so that the driver's seat 5 is located above the mower 4.
Gearshift levers 6 are arranged on the left and right sides of the driver's seat 5, and an engine 7 is mounted on the left-right intermediate portion above the rear part of the fuselage behind the driver's seat 5. The power from the engine 7 is a transmission shaft caused by vibration. It is transmitted to an input shaft 10 of a mission case 9 arranged below and in front of the engine 7 via a ball joint 8 which allows a misalignment, and in the mission case 9, three spur gears 11 from the input shaft 10 are transmitted. Is transmitted to the power distribution mechanism 12 via the
Power for traveling from is distributed and transmitted to the left and right HSTs (hydrostatic stepless transmission) 15 via the pair of bevel gears 13 and the left and right relay shafts 14 and the like.
The power after the gear shift by 5 is transmitted to the corresponding drive wheels 3 on the left and the right via the reduction mechanism 17 provided in each of the left and right axle cases 16.

That is, in the traveling machine body 1, the power from the engine 7 is independently transmitted to the left and right drive wheels 3 via the corresponding left and right HSTs 15, and the left and right gear shifts associated with the left and right HSTs 15 are linked. By operating the lever 6 and operating the left and right HSTs 15 independently, the left and right HSTs 15
15 are operated in the same speed change state to drive the left and right drive wheels 3 at a constant speed, and the left and right HSTs 15 are operated in different speed changes so that the left and right drive wheels 3 are driven differentially. It can be switched. In addition, HS
Since T15 is configured to be switchable between forward and backward, the turning state is a gentle turning state in which the left and right drive wheels 3 are driven in the same direction, and a pivot state in which one of the left and right drive wheels 3 is stopped. The turning state and the spin turning state in which the left and right drive wheels 3 are driven in the opposite directions can appear.

As shown in FIGS. 1, 2 and 4, the power distribution mechanism 12 is equipped with a multi-plate type work clutch 18 for connecting and disconnecting the work power, and the work power via the work clutch 18 is used. Is transmitted to the power take-off shaft 22 via the first transmission shaft 19 facing forward and backward and a pair of spur gears 21 provided in the front case 20 at the front of the machine body, and the rear end of the power take-off shaft 22 is transmitted. From the input shaft 25 of the mower 4 through the pair of ball joints 23 and the second transmission shaft 24 facing forward and backward.
Is configured to be transmitted to.

The power take-off shaft 22 can also take power from its front end. By utilizing the front end of the power take-off shaft 22, although not shown, the traveling machine body It is possible to easily transmit power to an auxiliary work device equipped in front of the vehicle. And, for example, when the auxiliary working device is an auxiliary mower having a narrower cutting width than the mower 4, by inserting the auxiliary mower into a space between standing trees narrower than the cutting width of the mower 4, It becomes possible to easily perform mowing work in those narrow places, and when the mower is located on the lateral side of the mower 4 to extend the cutting width, it is possible to mow the grass in a wide work area. The work efficiency can be improved.

The mower 4 is provided with a pair of left and right blades 27 for mowing in a housing 26 so as to be rotatable around a vertically oriented support shaft 28, and the power for work transmitted to the input shaft 25 is used as a pair. One support shaft 28 via the bevel gear 29
Is transmitted to the other support shaft 28 via the belt type transmission mechanism 30 from the one support shaft 28, so that the left and right blades 27 are partially overlapped in their rotational loci. In addition, the overlapping parts are configured so as to be driven backwards at a constant speed in the opposite directions, and the grass is mowed by this rotation, and the transport wind generated by this rotation is used. The grass is discharged and conveyed rearward from an outlet (not shown) formed in the rear left and right center of the housing 26.

As shown in FIGS. 1 and 2, the housing 2
The grass clippings discharged from the discharge port of No. 6 are guided by a grass collection duct 31 connected to the discharge port to a grass collection container 32 mounted on the rear portion of the traveling machine body 1.

As shown in FIGS. 1 to 4, the left and right HST 15
And the deceleration mechanism 17 are distributed to the left and right symmetrical positions sandwiching the power distribution mechanism 12 arranged in the left and right center of the traveling machine body 1, whereby the power distribution mechanism 12 and the left and right HSTs 15 and the deceleration mechanism 17 are arranged. Form a gate shape having a space 33 in the lower left and right center. or,
The left and right deceleration mechanisms 17 are arranged so as to be connected to the outer side of the fuselage of the corresponding HST 15, so that
A relatively large space 33 can be secured.
The grass collection duct 31 is arranged so as to pass through the center of the space 33 on the left and right.

That is, the left and right HSTs 15 and the deceleration mechanism 17, which are heavy, are symmetrically arranged left and right, and the hollow lightweight grass collecting duct 31 is arranged so as to pass through the center of the space 33 formed between them. Therefore, it is possible to improve the left-right balance of the mower as a whole, and the mower 4
It is possible to collect the cut grass discharged from the inside of the grass collecting container 32 without unevenness. Moreover, by disposing the left and right deceleration mechanisms 17 on the outer sides of the corresponding HST 15, the relatively expensive HSs caused by contact with other objects
The damage of T15 can be effectively suppressed by each reduction mechanism 17, and a relatively large space 33 can be secured, so that the grass collecting duct 31 can be arranged more easily, and further, the left and right The distance between the drive wheels 3 can be increased, and the stability of the entire mower can be improved.

As shown in FIGS. 2 to 4, the left and right HSTs 1
5, the corresponding output shaft 34 of HST15
A wet brake 35 for braking the corresponding drive wheel 3 by applying a braking action to each of the left and right wet brakes 35 is linked to a single brake pedal 36 disposed in the front right part of the traveling vehicle body 1. Has been done.

That is, by providing the wet brakes 35 on the inner sides of the left and right HSTs 15, the damage of the wet brakes 35 caused by contact with other objects can be effectively suppressed, and the left and right HSTs 15 can be effectively prevented. By linking the wet brake 35 of FIG. 1 to a single brake pedal 36,
Both the left and right wet type brakes 35 can be simultaneously actuated by depressing operation 6 and the machine body can be braked without shaking.

Incidentally, the reference numeral 37 shown in FIGS. 1, 2 and 4 rotates integrally with the intermediate spur gear 11 of the three spur gears 11 extending from the input shaft 10 of the mission case 9 to the power distribution mechanism 12. It is a gear pump that is driven according to the rotation of the intermediate shaft 38.

As shown in FIGS. 1 and 5, a grass container 32
Is rotatably mounted on a support frame 40 which is communicatively connectable to a grass collecting duct 31 whose rear end is supported by a pair of left and right brackets 39 connected to the rear of the traveling body 1. Through the support shaft 41 facing left and right, the support shaft 41
A front end of a hydraulic cylinder 42, which is connected to the support frame 40 so as to swing up and down, swings a swing link 43 connected to a support shaft 41 around the support shaft 41, thereby to move the front end thereof. The opening formed in is connected to the support frame 40 so that it can be switched between a forward grass-collecting posture and a downward grass-facing posture in which the opening faces the ground.

The support frame 40 is a pair of upper and lower erected so as to form four parallel links extending from the upper left and right ends of the fall protection frame 44 erected on the traveling machine body 1 to the lower side walls of the corresponding support frame 40. It is connected to the traveling machine body 1 via an elevating link mechanism 47 composed of an oscillating arm 45, a hydraulic cylinder 46 laid across the tipping protection frame 44 and the oscillating arm 45 on the lower left side, and In operation, the grass collection container 32 extends over a grass collection position that is received by the left and right brackets 39 in a state of communicating with the grass collection duct 31 and a grass removal position that is largely separated from the grass collection duct 31 above the grass collection position. Along with it, it is designed to be raised and lowered.

In other words, this mower is of a high dump type in which the grass container 32 is switched between a grass collecting position and a grass discharging position at a high grass discharging position far away from the grass collecting duct 31.

As shown in FIGS. 1, 5 and 6, the grass container 32 includes a base frame 48, a ceiling wall 49 made of punching metal, left and right lateral side walls 50 and a rear wall 51 (see FIG. 9). , And the bottom wall 52 made of a non-perforated thin steel plate is connected, so that the ceiling wall 49, the left and right lateral side walls 50, and the rear wall 51 each have a large number of exhaust holes 53. With this, the grass collection container 3
The carrier air flowing into the inside 2 can be discharged to the outside of the grass collecting container 32 through a large number of exhaust holes 53, so that the grass can be smoothly collected in the grass collecting container 32.

By the way, when a large number of exhaust holes 53 are formed in the grass container 32 as described above, when a large amount of dust is carried together with the cutting grass by the carrying wind, the large amount of dust and a large amount of dust are carried together with the carrying wind. From the exhaust hole 53 to the grass container 3
2 It will be discharged outside and will be scattered into the atmosphere as it is, so depending on the traveling direction of the aircraft and the wind direction,
The dust discharged from the large number of exhaust holes 53 causes the boarding operation unit 54 to
And a problem that deteriorates the work environment occurs.

Therefore, as shown in FIGS. 6 to 9, in this mowing machine, a flow path 55 of the carrier air discharged from a large number of exhaust holes 53 is collected between the grass collecting container 32 and the flow path 55. An air guide case 56 that can be attached to the grass container 32 is provided.

In the wind guide case 56, a pair of left and right second resin plates 58 are adhered to a first resin plate 57 that is bent in a U-shape so that the ceiling wall 59, the left and right lateral side walls 60, and the rear side walls 60. Wall 6
1 and a light-weight resin formed so as to have a bottom wall 62, and the grass container 32 is provided on the front inner surface side of the ceiling wall 59.
A pair of left and right connecting arms 63 provided on the front upper part of the base frame 48 for connecting to the support frame 40.
An engaging member 65 that can be engaged with an engaging pin 64 that projects from the left to the right is coupled to the engaging pin 65. The engaging member 65 is engaged with the left and right engaging pins 64, and the rear portion of the ceiling wall 59 thereof. Is connected to the upper rear portion of the base frame frame 48 via a first spacer 66, and the rear wall 61 is connected to the rear portion of the base frame frame 48 via an arch-shaped second spacer 67, and its bottom wall 62 is connected.
Is directly connected to the bottom portion of the base frame 48, and between the ceiling wall 59 and the ceiling wall 49 of the grass container 32, the left and right side walls 50 and the left and right side walls 60 of the grass container 32. Between the rear wall 51 and the rear wall 61 of the grass container 32 and the rear wall 61 of the grass container 32 so that the flow path 55 of the transport wind is formed. Has become.

In this mounted state, the vertical wall portion 68 extending over the left and right connecting arms 63 of the base frame 48 and the left and right flanges outwardly extended from both left and right front edges of the base frame 48. The portion 69 closes the opening formed between the front end edge of the grass collection container 32 and the front end edge of the wind guide case 56.

Further, the wind guide case 56 has its lower half portion located below the driver's seat 5 when the grass container 32 is located at the grass collecting position. At the lower end of the side wall 60, three exhaust ports 70 are formed to exhaust the carrier air flowing through the flow path 55 to the outside of the air guide case 56.

With the above construction, if the wind guiding case 56 is attached to the grass collecting container 32 so as to surround it, the carrier air that has flowed into the grass collecting container 32 together with the grass is supplied from the numerous exhaust holes 53 to the grass collecting container 3.
After flowing out to the outside, the air flows in the flow path 55 formed between the grass container 32 and the wind guide case 56, and the wind guide case 56
In the case where a large amount of dust is carried along with the cutting grass on the carrying wind through the exhaust ports 70 formed at the lower ends of the left and right lateral side walls 60 in the. However, the large amount of dust is discharged from a large number of exhaust holes 53 together with the transport wind, and then the flow path 5
5 is discharged to the atmosphere through the exhaust ports 70 below, and thus the discharged dust is discharged as compared with the case where the dust is directly discharged from the exhaust holes 53 into the atmosphere. It is possible to effectively suppress the occurrence of a defect that reaches the boarding operation unit 54 and deteriorates the work environment.

Further, since the transport wind flows down the flow path 55 between the grass container 32 and the wind guide case 56, the grass container 3
Also in the inside of 2, the conveying wind has a downward directivity, so that the cutting grass and dust in the grass container 32 are prevented from flying up, whereby dust from the exhaust holes 53 is prevented. While the outflow can be suppressed, the outflow of the carrier air can be performed more smoothly, so that the deterioration of the work environment due to the dust discharged from the grass collection container 32 can be more effectively suppressed and the grass collection container 32 can be more effectively prevented. The grass can be collected more efficiently.

6 to 9, reference numeral 71 is a pair of left and right handles in the front-rear direction mounted on the ceiling wall 59 of the wind guide case 56, and reference numeral 72 is the rear of the wind guide case 56. The wind guide case 56 is a left-right handle mounted on the wall 61, and by using these handles 71, 72, the handle is made of a light-weight resin so that it can be easily attached to and detached from the grass container 32. The workability of attaching and detaching can be further improved.

[Other Embodiments] Other embodiments of the present invention will be listed below. (1) The working machine may be a sweeper dedicated to collecting grass that has been left on the work site during mowing work, or a front mower type equipped with a mower 4 in the front part of the traveling machine body 1. It may be a mower or the like. (2) As shown in FIG. 10, as a working machine, a low dumper in which the grass container 32 is switched between a grass collecting position and a grass discharging position at a low grass collecting position immediately behind the grass collecting duct 31. It may be configured as a formula. Incidentally, FIG.
In the left and right brackets 39 connected to the traveling body 1,
Support frame 40 including grass container 32 and hydraulic cylinder 42
The example is shown in which the wind guiding case 56 is attached to the outer periphery of the grass collection container 32 of a low-damping type mower by directly connecting the above without the lifting link mechanism 47. (3) As the air guide case 56, an exhaust port 70 may be formed at the lower end of the rear wall 61 for discharging the carrier air flowing through the flow passage 55 to the outside of the air guide case 56. At the lower ends of the left and right lateral side walls 60 and the rear wall 61, exhaust ports 70 may be formed for discharging the carrier air flowing through the flow path 55 to the outside of the air guide case 56. The shape and quantity of the exhaust port 70 can be variously changed. (4) The wind guide case 56 may be made of sheet metal made of thin steel plate. (5) The wind guide case 56 is attached to the ceiling wall 49 and the left and right side walls 5
No. 0, and the rear wall 51 is attached to the grass collection container 32 in which a lightweight net or the like is adopted so as to reduce the weight of the entire grass collecting structure and is blown off by the blade 27 to make the net. It may be possible to avoid the possibility that a small stone or the like that has pierced the like will jump out to the rear as it is.

[Brief description of drawings]

[Figure 1] Overall side view of the mower

FIG. 2 is a plan view of the main part of the mower.

[Figure 3] Rear view of the main part of the mower

[Fig.4] Transmission system diagram of mower

FIG. 5 is a side view of the main part showing the weeding condition.

FIG. 6 is a perspective view showing a configuration of a grass container and a wind guide case.

FIG. 7 is an overall side view of a mower in which a wind guide case is externally attached to a grass container.

FIG. 8 is a vertical cross-sectional side view showing a state in which the wind guide case is externally fitted to the grass container.

FIG. 9 is a vertical cross-sectional rear view showing a state in which a wind guide case is externally fitted and attached to a grass collection container.

FIG. 10 is an overall side view of a mower showing another embodiment in which a wind guide case is externally fitted and attached to a low dump type grass container.

[Explanation of symbols]

1 traveling aircraft 31 grass collection duct 32 grass container 53 Exhaust hole 55 Flow path 56 wind guide case 60 side wall 61 rear wall 70 Exhaust port

Claims (2)

[Claims] 1. A rear part of the traveling machine body is equipped with a grass collection container for receiving the cut grass guided by a grass collection duct equipped to the traveling machine body, and the grass collection container is directed to the grass collection container. A grass collecting structure of a working machine in which a large number of exhaust holes are formed to discharge the conveying air to be conveyed outside the grass collecting container, wherein the flow path of the conveying air discharged from the exhaust holes is the grass collecting container. And a wind guide case that can be attached to the grass container in a state of being formed between the wind guide case and the lateral side wall and the rear wall of the wind guide case. A grass collecting structure for a working machine in which an exhaust port for discharging the transport wind to the outside of the wind guide case is formed at the lower end of the. 2. The grass collecting structure for a working machine according to claim 1, wherein the wind guide case is made of a resin material.