JP2003189719A - Grass-collecting structure for working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grass-collecting structure for a working machine easily carrying out a mowed grass removal work when mowed grasses clog inside of a grass-collecting duct, and prevents leak out of the mowed grasses from a connecting port of a grass-collecting container in unloading work of the mowed grasses. <P>SOLUTION: The working machine has the grass-collecting container 32 on the rear part of the traveling machine body 1 and a grass-collecting duct 31 on the body 1, and the container 32 is set to receive mowed grasses guided by the duct 31 from a connecting port 40 formed on the front part. The grass- collecting container 32 is liftably connected through a lifting and lowering link mechanism 49 and set lift up and down between a grass-collecting position connected to the grass-collecting duct 31 and a grass unloading position upward of the grass-collecting position separated from the grass-collecting duct 31, and has on the grass-collecting container a lid 58 having a front-falling posture falling down into the grass-collecting duct 31 to permit the mowed grasses to flow into the container 32 from the connecting port 40 and a stand up posture preventing the leak out of the mowed grasses from the connecting port 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear part of a traveling body, and a grass collection container for receiving the cut grass guided by a grass collection duct mounted on the traveling body from a communication opening in the front part is connected to the grass collection duct. The present invention relates to a grass collecting structure for a working machine, which is connected via an elevating link mechanism so that the grass can be moved up and down over a grass collecting position and a grass discharging position above the grass collecting position and separated from the grass collecting duct.

[0002]

2. Description of the Related Art Conventionally, in the grass collecting structure of a working machine as described above, when the rearward inclination angle of the grass collecting duct is reduced, it becomes difficult for the grass to flow toward the upper side of the grass container,
Even if the upper part of the grass collection container is empty, it may cause the grass to overflow from the collection container to the grass collection duct.Therefore, set the rearward inclination angle of the grass collection duct to a relatively large angle. Therefore, the above-mentioned inconveniences were avoided.

During the grass collecting and discharging operation for discharging the collected grass from the grass collecting container, the grass collecting container in the grass collecting posture is located at the grass collecting position and the front communication port is connected to the grass collecting duct. , With its communication opening wide open, and raising it to the weeding position with the grass collection posture in which the communication connection between the communication opening and the grass collecting duct is possible, and after reaching the weeding position, weed collection It was designed to switch the container from the grass collecting position to the weeding position.

[0004]

Therefore, in the above-mentioned prior art, when the rearward inclination angle of the grass collection duct is set to a relatively large angle, the grass is wet and heavy and easily attached. Is likely to cause grass clogging in which the grass is attached to the rear end of the grass collection duct, and if this grass clogging occurs, raise the grass collection container to the weeding position away from the grass collection duct. Therefore, it was necessary to perform a troublesome work such as removing the jammed grass from the rear opening of the grass collection duct.

Further, during the grass collecting and discharging operation, the grass collecting container in the grass collecting posture with the communication opening largely opened is raised from the grass collecting position to the grass discharging position. Sometimes, there was a problem that the grass clippings leaked from the front communication port.

The object of the present invention is to facilitate the removal of the grass when the grass is clogged in the grass collecting duct and prevent the grass from leaking from the communication port of the grass container during the grass discharging operation. To be able to do it.

[0007]

[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. A grass collection container that receives cut grass from the front communication port can be moved up and down between a grass collection position connected to the grass collection duct and a grass removal position separated from the grass collection duct above the grass collection position. In the grass collecting structure of the working machine, which is connected via the lifting link mechanism, the grass container is sunk into the grass collecting duct to prevent the inflow of the cut grass from the communication port into the grass collecting container. A lid body is provided that can be switched between an allowed forward tilting posture and a standing posture that prevents the cut grass from leaking out from the communication port.

[Operation] According to the invention described in claim 1, in the grass-collecting state in which the grass-collecting container is positioned at the grass-collecting position, the lid body is switched to the forward tilted position to guide the grass-collecting duct. The cut grass comes into the grass container through the communication port. In addition, the forward tilting posture of the lid body is the posture in which the lid body falls down into the grass collection duct.Therefore, when the grass is wet and heavy and easily attached, the grass should be attached and deposited on the lid. If grass clogging occurs due to this adhesion and accumulation, the grass can be sent into the grass container by switching the lid from the forward tilting posture to the standing posture. become.

When performing the grass collecting and discharging operation, first, the lid body is switched from the forward tilted posture to the standing posture, and then the grass collecting container is raised from the grass collecting position to the grass discharging position. This makes it possible to prevent the occurrence of the problem that the mowing grass in the grass container leaks from the front communication port.

[Effect] Therefore, when the grass is clogged in the grass collecting duct, the grass can be easily removed, and the grass can be prevented from leaking from the communication port of the grass container during the grass discharging operation. As a result, it has become possible to improve the efficiency of grass collection work.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, the lid is linked to an operating tool provided in a boarding operation section. Work equipment grass collection structure.

[Operation] According to the second aspect of the present invention, by operating the operation tool, it is possible to perform the attitude switching operation of the lid body mounted on the grass container while being in the boarding operation section.

[Effects] Therefore, it has become possible to more easily perform the grass cutting work and the prevention of grass leakage.

[Structure] In the invention according to claim 3 of the present invention, in the invention according to claim 1 or 2, the lid body is in a state of being recessed downward when in the forward tilted posture. The recess was formed.

[Operation] According to the third aspect of the present invention, when the cut grass flows out of the grass container into the grass duct in the grass collecting state, the flowing grass can be received by the concave portion of the lid. By the posture switching operation from the forward tilted posture of the lid body to the standing posture when performing the grass collection and discharging work,
It becomes possible to send the cut grass received in the recess into the grass container.

Further, as compared with the case where the lid body is formed in a flat plate shape, the cutting grass accumulated on the lid body can be more reliably fed into the grass collection container by the attitude switching operation of the lid body.

[Effect] Therefore, the amount of grass collected in the grass container can be increased, and the efficiency of grass collection can be improved.
It has become possible to more reliably send the cut grass accumulated on the lid to the grass collection container.

[0018]

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 FIG. 1, FIG. 2 and FIG. 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 the front end thereof. By utilizing the front end of the power take-out shaft 22, although not shown in the drawing, 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 paired with a pair of blades. 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 in the 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 due to contact with other objects can be effectively suppressed, and the left and right sides can be effectively suppressed. 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, 5 and 6, the grass collection container 32 has a grass collection duct 3 whose rear end is supported by a pair of left and right brackets 39 connected to the rear part of the traveling machine body 1.
1. A container main body 42 is attached to a front wall portion 41 in which a communication port 40 that allows communication connection with the container 1 is formed. By the vertical swinging around the support shaft 43, the forward grass-collecting attitude in which the opening formed in the front end of the container body 42 is closed by the front wall portion 41 and the downward discharging direction in which the opening faces the ground and is opened. A hydraulic cylinder 45 that is connected to the grass posture so that the posture can be switched, and that performs a posture switching operation of the container body 42 around the support shaft 43 across the front wall portion 41 and the swing link 44 connected to the support shaft 43.
Is constructed by erection.

The front wall portion 41 of the grass container 32 is the traveling body 1
Parallel to each other from the left and right upper end portions of the fall protection frame 46 installed upright to the corresponding lower side wall of the front wall portion 41.
Via a pair of upper and lower swing arms 47 that are installed so as to form a communication link, and an up-and-down link mechanism 49 that is configured by a hydraulic cylinder 48 that is installed over the fall protection frame 46 and the lower left swing arm 47. The grass container 32 is connected to the traveling body 1 and has a connecting structure.
Is operated by the hydraulic cylinder 48, and the grass collecting duct 3 is connected to the grass collecting duct 31 and above the grass collecting position.
It is possible to move up and down to a weeding position that is largely separated from 1.

When the grass container 32 is located at the grass collecting position, the front wall 41 is received by the left and right brackets 39 and the communication port 40 is connected to the grass collecting duct 31. Is located at the weeding position, the grass collecting duct 31 is separated from the left and right brackets 39.
The communication connection between the communication port 40 and the communication port 40 is released.

That is, this mowing machine 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 which is largely separated from the grass collecting duct 31. The hydraulic cylinders 45 and 48 are configured to expand and contract based on the operation of each operation tool (not shown) provided in the boarding operation unit 50.

In the grass container 32, at the lower end of the front wall 41, the container body 4 is swung about the left and right supporting shafts 51.
2 is engaged with an engaging member 52 extending toward the front wall portion 41 to lock and hold the container body 42 in the grass-collecting position, and the engaging member 52 is released to release the container body. A lock tool 53 including a pair of left and right hook members that can be integrally switched to the unlocked state that allows the attitude switching of 42 to the weeding attitude is provided.

The lock tool 53 is returned to and held in the locked state by the urging force of a spring 55 installed over the support member 54 extending forward from the front wall portion 41 and the lock tool 53, and the boarding operation section 50. Locking tool 53
By depressing an operation pedal 57 (see FIG. 1 and FIG. 2) which is an example of an operation tool 57 linked with a release wire 56, it is switched to an unlocked state against the bias of the spring 55. It is like this.

In other words, the spring 55 is used during the grass cutting work.
Since the lock tool 53 can be returned to and held in the locked state by the urging of the container body, it is possible to prevent rattling of the container body 42 with respect to the front wall portion 41 caused by traveling of the machine body, and generation of abnormal noise due to the rattling. It becomes possible to perform a suitable grass-cutting and grass-collecting work that can prevent leakage of the grass-cutting from the gap between the front wall portion 41 and the container body 42, and when performing grass-collecting discharge work, depress the operation pedal 57. By operating the operation tools corresponding to the hydraulic cylinders 45 and 48, the lock tool 53 is switched from the locked state to the unlocked state, and the grass collection container 32 is raised from the grass collection position to the grass removal position and discharged. It becomes possible to easily perform a series of operations such as switching the container body 42 from the grass collecting position to the weeding position at the grass position while staying in the boarding operation unit 50.
When the grass cutting and grass collecting work is performed again after the grass collecting and grass removing work, the container main body 42 is weeded by operating the operation tools corresponding to the hydraulic cylinders 45 and 48 and the depression release operation of the operation pedal 57. There is a series of operations in the boarding operation unit 50, such as switching from the posture to the grass collecting posture, lowering the grass collecting container 32 from the weeding position to the grass collecting position, and switching the lock tool 53 from the unlocked state to the locked state. However, it is easy to do.

In the locked state, the locking tool 53 is tilted forward to allow the communication port 40 to be largely opened and to fall into the grass collecting duct 31 to allow the inflow of cut grass from the communication port 40 into the grass container 32. In the unlocked state, the lid body 5 is switched to an upright posture in which the communication port 40 is closed to prevent the cut grass from leaking from the communication port 40.
8 is integrally equipped, and the lid 58 is provided with a recess 5 that is recessed downward when the lid 58 is tilted forward.
9 is formed.

With this configuration, during the grass cutting and collecting work in which the grass container 32 is located at the grass collecting position, the lid 58 is brought to the forward tilted posture in accordance with the operation of switching the lock tool 53 from the unlocked state to the locked state. Since it is switched, the grass cut guided by the grass collecting duct 31 can smoothly flow into the grass collecting container 32 from the communication port 40, and
When performing the grass collection / discharging operation, the lid 58 is switched to the upright posture in accordance with the switching operation from the locked state of the lock tool 53 to the unlocked state at the stage when the grass collection container 32 is located at the grass collection position. Therefore, it is possible to avoid the problem that the grass in the grass container 32 leaks from the front communication port 40 during the raising operation for raising the grass container 32 from the grass collecting position to the grass discharging position. It is like this.

Moreover, the forward tilting posture of the lid 58 is the posture in which the lid 58 falls down into the grass collecting duct 31, so that when the grass is wet and heavy and easily attached, the grass is cut. When the grass clogging due to the adhesion and deposition occurs, the operation pedal 57 is depressed to operate the lid 58.
By switching from the forward leaning posture to the standing posture, it is possible to send the grass cut and deposited on the lid 58 into the grass collecting container 32 while being in the boarding operation unit 50, and to easily clear the grass clogging. You can do it.

Further, even if there occurs a problem that the grass cut out from the grass collection container 32 into the grass collection duct 31 during the grass cutting work, the recessed grass 59 of the lid 58 can catch the outflowing grass. Lid 58 for collecting and discharging grass
By performing the posture switching operation from the forward leaning posture to the standing posture, the grass grass received by the recess 59 can be sent into the grass collecting container 32, and the grass can be prevented from leaking from the communication port 40. It is possible to increase the amount of grass to be collected in 32, thereby improving the efficiency of grass collection work.

As shown in FIG. 1, FIG. 5 and FIG. 7, the container body 42 of the grass collection container 32 can be adjusted in the front-rear length by sliding the rear half 61 with respect to the front half 60 in the front-rear direction. Configured, which allows the grass container 3
It is possible to easily change the grass-collecting capacity of the grass-collecting container 32 to a size according to the mowing capacity of the mower 4 and the like without the trouble of replacing 2.

Reference numeral 62 shown in FIGS. 1, 5 and 7
Is a plurality of longitudinal holes formed in the rear half portion 61 so as to allow the rear half portion 61 to slide in the front-rear direction with respect to the front half portion 60 of the container body 42. Reference numeral 63 indicates the corresponding long hole 62. Is a bolt that is screwed into a welding nut 64 provided in the front half portion 60 and is attached to the rear end of the rear half portion 61 to facilitate the sliding operation of the rear half portion 61. It is a handle.

[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) The lid 58 may not be integrally provided with the lock tool 53 but may be independently operated by the operation tool 57, and its shape can be variously changed. (3) The operation pedal 57 illustrated as an example of the operation tool 57 in the above-described embodiment is held at the stepping position by the stepping operation from the stepping release position to the stepping position, and at the stepping position by the stepping operation at the stepped position. The holding may be released to return to the depression release position. (4) As the operation tool 57, an operation lever configured to be able to hold the position at the unlocked position may be adopted.

[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. 6A is a vertical cross-sectional side view of an essential part showing a state in which the lid is switched to the forward tilting position. FIG. 6B is a vertical cross-sectional side view of an essential part showing the state in which the lid is switched to a standing posture.

FIG. 7 is a side view of the main part showing the structure of the grass container.

[Explanation of symbols] 1 traveling aircraft 31 grass collection duct 32 grass container 40 communication ports 49 Lifting link mechanism 50 Boarding Department 57 controls 58 Lid 59 recess

Claims (3)

[Claims] 1. A grass collection container at the rear of the traveling machine body, which receives the grass that is guided by a grass collection duct mounted on the traveling machine body from a front communication port, and a position where the grass collection position is continuous with the grass collection duct. A grass collecting structure for a working machine connected via an elevating link mechanism so as to be able to move up and down over a grass discharging position that is separated from the grass collecting duct above the grass position. , A posture in a frontward tilting posture that falls into the grass collecting duct to allow the cut grass to flow into the grass collecting container from the communication opening, and a standing posture that prevents leakage of the cut grass from the communication opening. A grass collecting structure for a working machine equipped with a switchable lid. 2. The grass collecting structure for a working machine according to claim 1, wherein the lid is linked to an operation tool provided in a boarding operation section. 3. The recess is formed in the lid body so as to be recessed downward when in the forward tilting posture.
Or, the grass collecting structure of the working machine described in 2.