JP2005058104A - Mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grass collection bag for collecting mowing grass from a mower on both the left and right sides of a driving part provided at a rear portion of a passenger traveling machine body, and to provide a guide cover over the grass collection bag. In a mower that is configured to guide the grass that has been thrown into the cover to each grass bag, it is possible to collect grass using the capacity of the grass bag and to raise the height of the grass. We will be able to collect grass with as little as possible.
SOLUTION: Bag mounting portions 63 that support the mouth edge of the grass collecting bag 60 in an upward opening posture are provided on both the left and right sides of the driving portion 7 with an interval between the left and right, and the space between the left and right bag mounting portions 63 is closed. A bottom plate 67 is provided, and a tunnel passage 68 for passing through the cut grass is formed by the bottom plate 67 and the guide cover 65.
[Selection] Figure 10

Description

  The present invention relates to a mower configured to collect grass cut by a mower in a grass collection bag.

As a mower configured to collect mowing grass using a grass collecting bag, a grass collecting bag for collecting mowing grass from the moor is arranged on both the left and right sides of the prime mover provided at the rear of the riding traveling machine body. A structure is known in which a guide cover is provided over the grass collection bag, and the grass cut into the guide cover is guided to each grass collection bag (for example, Patent Document 1).
U.S. Pat. No. 4,723,398

  In the above-described conventional mower, the pair of left and right grass collecting bags opened with a width that is approximately half the width of the guide cover is supported so that the opening edges thereof are lined up left and right above the driving portion without gaps, Since the grass collection bag was hung on the top and side surfaces of the prime mover, the grass collection bag was bent in a bowl shape and collected using the capacity of the grass collection bag. Was not done.

  In addition, in order to introduce mowing grass smoothly and sufficiently into the grass collecting bag supported by hanging in a bowl shape, it is necessary to keep the opening position of the grass collecting bag as high as possible from the prime mover, which increases the position of the guide cover. It was a thing. When the position of the guide cover is increased in this way, the height of the lift from the mower to the guide cover insertion port increases, and accordingly, it becomes necessary to increase the lifting capacity of the blower for conveying hay, and the power consumption of the blower is reduced. It was something that grew.

  The present invention has been made paying attention to such points, and can collect grass by fully using the capacity of the grass collection bag and lower the height of cutting grass as much as possible. The main purpose is to provide a mower that can perform a limited amount of grass collection.

The grass mower according to the first aspect of the present invention is provided with a grass collection bag for collecting mowing grass from the moor on both the left and right sides of the prime mover provided at the rear of the riding traveling machine body, and over the grass collection bag. In the grass cutter configured to guide the grass that has been scattered into the guide cover to each collecting bag,
Provided on both left and right sides of the prime mover with a bag mounting portion that supports the mouth of the grass collecting bag in an upwardly open position with a left and right spacing, and a bottom plate that closes the space between the left and right bag mounting portions is provided. A tunnel passage for passing through the grass cutting is formed by the guide cover.

  According to the above configuration, the grass cut into the guide cover is distributed to the left and right and guided to the left and right grass collection bags. In this case, the grass collecting bag is naturally supported by the bag mounting portion on the side of the driving unit without being bent, and the cut grass that has been scattered and guided is placed in the grass collecting bag that is supported by hanging straight. It is deposited smoothly.

  Here, the left and right bag mounting portions that support the mouth edge of the grass collection bag in an upward-opening posture are distributed to the left and right of the prime mover so that the suspended grass collection bag does not ride on the upper surface of the prime mover Therefore, it is not necessary to set the height of this bag mounting part to a position sufficiently higher than the driving part.For example, when the bottom plate that prevents the outflow of cut grass between the left and right bag mounting parts is a flat plate, The bag mounting portion that is approximately the same height as the flat plate may be installed at a height that is slightly higher than the upper surface of the driving portion, and the height of the guide cover is relatively low corresponding to the height of the bag mounting portion. It will be a thing.

  Therefore, according to the first aspect of the invention, the grass bag is supported by hanging the grass bag in a natural posture by allocating to the left and right sides of the prime mover without riding on the upper surface of the prime mover. Can be used to collect grass. Further, since the grass collection bag can be mounted low, the height of the cut grass can be kept low, and the power consumption of the blower for lifting the cut grass to the guide cover can be reduced.

The mower according to the second aspect of the present invention, in the first aspect,
The bottom plate is constructed over the left and right bag mounting portions.

  According to the above configuration, when the guide cover is opened for cleaning, the guide cover is opened with the bottom plate remaining on the bag mounting portion side, so that the tunnel passage formed by the guide cover and the bottom plate is also opened. As a result, the inside of the guide cover and the bottom plate are greatly exposed. Further, the bottom plate laid over the left and right bag mounting portions also functions as a reinforcing member for preventing left and right bag mounting portions from being deformed left and right.

  Therefore, according to the second aspect of the invention, the tunnel passage for preventing the flow of the cut grass from between the left and right bag mounting portions and allowing the cut grass to flow can be greatly opened as the guide cover is opened. While bringing about the above-mentioned effects of the invention, the inside of the guide cover can be easily cleaned, and the maintainability is excellent.

The mower according to the third aspect of the present invention is the first or second aspect of the invention,
The driving portion is provided so as to protrude rearward from the left and right rear wheels, and the left and right bag mounting portions are respectively provided immediately after the rear wheels.

  According to the above configuration, since the grass collection bag moves substantially along the movement path of the rear wheel, the grass collection bag located on the left and right of the rear of the aircraft is easy to maneuver without hitting standing trees, etc. The effects of the first or second invention are brought about, and the handleability is excellent.

The mower according to the fourth aspect of the present invention is any one of the first to third aspects of the invention,
A gate-shaped fall protection frame is erected on the rear side of the driver's seat provided in front of the prime mover, and a grass collecting frame is detachably attached across the fall protection frame and the engine mounting frame in the prime mover. The bag mounting portion is provided on the grass collecting frame, and a guide cover is mounted so as to be swingable and openable.

  According to the above configuration, the grass collecting frame is connected and supported with a large span across the strength member separated from the fall protection frame located on the front side of the prime mover and the engine mounting frame located below the prime mover. For example, it is possible to configure a grass collecting portion having a high coupling strength using a light and simple frame member as compared with a case where the grass collecting frame is connected and supported only by the engine mounting frame.

  When performing maintenance on the prime mover, either remove the entire grass collection frame, or disconnect the fall protection frame from the grass collection frame, and center the connection point between the grass collection frame and the engine mounting frame. Then, the upper part of the driving part may be opened by rotating backward.

  Therefore, according to the present invention, the above-mentioned effects of any one of the first to third inventions can be brought about, and the entire grass collecting portion can be firmly supported with a high strength with a simple structure.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows the entire side surface of the mower according to the present invention, and FIG. 2 shows the plane thereof. This mower has a front link 4a, a rear link 4b, and a lower link between front and rear wheels in a traveling machine body 3 having a pair of left and right front wheels 1 configured as caster wheels and a pair of driven left and right rear wheels 2. The mower M is suspended and supported by a hydraulic cylinder 5 through a link mechanism 4 having a pair of left and right quadruple link structures composed of a lower connecting link 4c. Thus, the mower M can be moved up and down substantially in parallel. A driving unit 7 that houses the engine 6 is provided at the rear of the traveling machine body 3 so as to protrude rearward from the rear wheel 2, and a grass collecting device 8 for collecting cut grass is provided so as to straddle the driving unit 7. In addition, a driver's seat 9 is provided in front of the driving unit 7, and a gate-shaped fall protection frame (ROPS) 10 is erected between the driving seat 9 and the driving unit 7.

  Although the detailed description of the structure is omitted, the output of the engine 5 is input to the counter case 11 and branched into a traveling system and a working system, and the power of the traveling system is not shown in the figure disposed on the left and right sides of the counter case 11 Input to a pair of left and right hydraulic continuously variable transmissions (HST), and the shift output of each continuously variable transmission is separately transmitted to the left and right rear wheels 2 via the deceleration case 12, respectively. Then, the continuously variable transmission that drives the left and right rear wheels 2 shifts the left and right traveling levers 13 provided on the left and right sides of the driver's seat 9 so as to be able to swing back and forth separately. The rear wheels 2 are independently and continuously stepped forward and backward, and are moved straight forward and backward depending on how the left and right traveling levers 13 are operated, and the left and right rear wheels 2 are turned with a speed difference. A pivot turn with the wheel 2 stopped, a spin turn with the left and right rear wheels 2 driven in reverse, and the like can be arbitrarily performed. Further, the power of the branched work system is output forward from the PTO shaft 14 projecting from the lower front surface of the counter case 11 and transmitted to the mower M.

  As shown in FIG. 3, the mower M has three bar blades 16, 17, and 18 that are rotationally driven around the longitudinal axis in the same direction inside the deck 15 opened downward. The deck 15 has a structure that is pivotally supported, and the deck 15 is configured as a flat deck in which the top plate height is set to the same overall height, and a cut grass discharge port d is formed at the right end thereof. .

  The working power taken out from the PTO shaft 14 is transmitted to a bevel gear case 19 provided on the center upper surface of the deck 15 via a bendable and extendable shaft transmission mechanism 20, and the bevel gear case 19 The rotational power converted into the rotation is transmitted to the rotation shaft 17a of the central bar blade 17, and the rotation shaft 17a and the rotation shafts 16a and 18a of the left and right bar blades 16 and 18 are wound and interlocked by the belt 21. The rotary blades 16, 17, and 18 are rotationally driven in the same direction (clockwise as viewed from above) so that the first half of the rotation trajectory of each rotary blade 16, 17, 18 is directed toward the grass cutting outlet d. It is like that. An idle wheel (anti-scalar roller) 22 for getting over obstacles is provided around the deck 15.

  At the right end of the deck 15 in the mower M, a blower B for forcibly conveying the mowing grass discharged from the mowing grass outlet d toward the grass collecting device 8 at the rear of the machine body is mounted and driven as follows. It has become.

  As shown in FIGS. 3 to 7, the blower B has a structure in which an impeller 32 that rotates around a vertical axis is pivotally supported on an upper wall of a blower case 31 connected to a grass cutting outlet d of the deck 15. The blower case 31 is connected and fixed to a U-shaped support frame 33 in plan view attached to the right end of the deck 15. The support frame 33 is connected to a connection fitting 34 fixed to the deck side at the front and rear ends of the support frame 33 via a connection pin 35. By removing the connection pin 35 and removing the support frame 33, the blower B can be separated from the cut grass outlet d and cleaned. The surrounding support frame 33 that connects and supports the blower case 31 also functions as a guard frame that surrounds the blower case 31.

  An intermediate longitudinal axis 36 is provided at the rear of the support frame 33. A pulley 37 attached to the lower end of the intermediate longitudinal axis 36 and a pulley 38 attached to the upper end of the blade driving shaft 18a of the right end bar blade 18. A belt 39 is wound around and stretched over a pulley 40 attached to the upper end of the intermediate longitudinal axis 36 and a pulley 42 of a blade drive shaft 41 projecting from the upper surface of the blower case 31. And the blower B is driven by the power extracted from the blade drive system.

  The belt 39 for interlockingly connecting the blade drive shaft 18a and the intermediate vertical shaft 36 is positioned higher than the blade drive belt 21. However, as shown in FIG. By connecting to the deck 15 in an upwardly inclined posture, the pulley 38 and the belt 39 do not interfere with a wide gap formed vertically between the rear portion of the lower connecting link 4c in the right link mechanism 4 and the upper surface of the deck. Has been deployed.

  A belt 39 that winds and interlocks the blade drive shaft 18a and the intermediate longitudinal axis 36 and a belt 43 that winds and interlocks the intermediate longitudinal axis 36 and the blade drive shaft 41 are pressed and tensioned by tension rollers 44 and 45, respectively. In addition, the tension roller 44 that acts on the belt 39 is configured as a tension clutch 46 that intermittently transmits power from the blade drive shaft 18 a to the intermediate vertical shaft 36. That is, as shown in FIG. 8, the tension roller 44 is mounted on a tension arm 47 swingable around a fulcrum a provided on the blower side, and the tension arm 47 and a fulcrum provided on the blower side. A switching operation lever 48 capable of switching and swinging around b is linked and connected via a curved link 49 and a spring 50, and the tension roller 44 is switched by swinging the switching operation lever 48 beyond the dead point. The clutch 50 is pressed against the belt 39 by the tension of the spring 50 and the clutch disengaged state in which the tension roller 44 is largely separated from the belt 39 to release the tension. The tension roller 45 is supported by a tension arm 52 supported so as to be swingable around the fulcrum a and urged by a spring 51 in a fixed direction, and the belt 43 is always in tension.

  As described above, the blower drive mechanism including the intermediate longitudinal axis 36, both tension arms 47 and 52, the belt 43, the switching operation lever 48, and the like is integrally assembled with the blower B and is unitized. When removing the unit, the tension clutch 46 is cut and held, the belt 39 is removed from the pulley 38 of the blade drive shaft 18a, the connecting pin 35 is pulled out and removed from the deck 15. Further, when the blower unit is attached to the deck 15, the belt 39 is wound around the pulley 38 and the tension clutch 46 is switched to the on state and held after being connected in the reverse procedure.

  Here, the intermediate longitudinal axis 36 is located at a corner portion in the direction of the machine body that is sandwiched between the discharge cylinder 31 a that protrudes backward from the outer peripheral portion of the blower case 31 and the circular outer periphery of the blower case 31. The blower drive mechanism is housed in the support frame 33 in a compact manner in the front, rear, left and right.

  In the blower case 31 of the blower B that is mounted and driven as described above, a cylindrical shape that supplies the cut grass forcibly discharged by the impeller 32 to the grass collecting device 8 at the rear of the machine body. A duct 53 is detachably inserted and connected.

  The grass collecting device 8 is configured to collect the grass cut and guided through the duct 53 in two grass collecting bags 60 mounted on the left and right sides of the driving unit 7 as follows. It is configured.

  A grass collecting frame 61 made of a pipe material is pin-connected across the left and right support column portions of the fall protection frame 10 and the engine mounting frame 23 located below the driving portion 7. Four bag support arms 62 are extended rearward from the suspended horizontal frame 61a, and a pair of left and right bag mounting portions 63 are distributed to the left and right of the prime mover 7 by two left and right bag support arms 62. . In addition, the rear end of the duct 53 is detachably connected at a position from the right, and a guide cover 65 that is opened downward as a whole swings up and down around the fulcrum c on the grass collection frame 61. It can be opened and closed freely.

  The grass collection bag 60 is sewn in a square bag shape with a highly breathable cloth material, and is configured to sew a core frame 66 made of a metal rod to the upper opening edge to hold the bag mouth in a rectangular shape. . The edge held by the core frame 66 is placed on and supported by the upper surfaces of the two bag support arms 62 in the bag mounting portion 63, and the bag edge is supported by the lower edge of the guide cover 65 lowered. By doing so, the lifting of the grass collection bag 60 is prevented.

  The two bag support arms 62 constituting the left and right bag mounting portions 63 are arranged at a position slightly higher than the engine bonnet 24 in the driving portion 7, and support the two inner bag supports so as to cover the engine bonnet 24. A bottom plate 67 is constructed over the arm 62. The bottom plate 67 forms a tunnel passage 68 that connects the upper spaces of the left and right bag mounting portions 63 in the guide cover 65 in a state where the guide cover 65 is lowered. The grass cut on the right side is guided by the guide cover 65 and guided to the left and right grass collection bags 60. It should be noted that the grass cutting air blown into the guide cover 65 is extracted from the mesh-shaped air exhaust port 69 formed in the inner surface of the rear half of the guide cover 65 to the air exhaust path 70 and is discharged below the rear part. It has become.

  When maintenance of the prime mover 7 is performed, as shown in FIG. 13, the pin connection between the grass collection frame 61 and the fall protection frame 10 is released, and the entire grass collection frame 61 is connected to the engine mounting frame 23. By rotating backward about the pin connection point e, the periphery of the prime mover 7 can be released.

  [Another Example]

  In the above embodiment, the bottom plate 67 is fixed across the left and right bag mounting portions 63, but the bottom plate 67 may be mounted on the guide cover 65 side.

Overall side view of mower Overall plan view of mower Moor's top view Cross section plan of blower Longitudinal side view of blower Blower longitudinal rear view Vertical side view of the blower main part Top view of tension clutch Vertical side view of the grass collector Vertical rear view of the grass collector Longitudinal side view showing part of the grass collecting device with the guide cover open Exploded perspective view of grass collector Overall side view of mower with open grass collector

Explanation of symbols

2 Rear wheel 3 Traveling machine body 7 Driving part 9 Driver's seat 10 Fall protection frame 23 Engine mounting frame 60 Grass collection bag 61 Grass collection frame 63 Bag mounting part 65 Guide cover 67 Bottom plate 68 Tunnel passage M Moore

Claims (4)

A collection bag for collecting the mowing grass from the moor is provided on both the left and right sides of the prime mover provided at the rear part of the riding traveling machine body, and a guide cover is provided above the collection bag. In the mower configured to guide the grass that has been thrown into each collecting bag,
Provided on both left and right sides of the prime mover with a bag mounting portion that supports the mouth of the grass collecting bag in an upwardly open position with a left and right spacing, and a bottom plate that closes the space between the left and right bag mounting portions is provided. A mower passing tunnel is formed by the guide cover and the guide cover.   The mower according to claim 1, wherein the bottom plate is constructed over the left and right bag mounting portions.   The mowing machine according to claim 1 or 2, wherein the driving portion is provided so as to project rearward from the left and right rear wheels, and the left and right bag mounting portions are respectively provided immediately after the rear wheels. .   A gate-shaped fall protection frame is erected on the rear side of the driver's seat provided in front of the prime mover, and a grass collecting frame is detachably attached across the fall protection frame and the engine mounting frame in the prime mover. The grass mower according to any one of claims 1 to 3, wherein the bag mounting portion is provided on a grass collecting frame, and a guide cover is swingably opened and closed.

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