JPH0418351Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a mower grass collecting device.

(Prior art) A mower is attached to the lower abdomen of the vehicle body, and the grass clipped by the mower is collected by a blower through a duct into a grass collection box, as disclosed in US Patent No.
It is well known in the specification of No. 4114353.

In particular, the grass collecting device described in the above specification is provided with a blower on one left and right side of the mower deck, corresponding to the cut grass discharge port, and is driven by the power extracted from the transmission device for driving the cutter of the mower. Since the blower is located closest to the outlet, it has the advantage of being able to forcefully feed the grass clippings.

(Problems to be Solved by the Invention) However, in this case, since the blower rotates around the vertical axis, there were the following drawbacks. That is, since the blower blade rotates around the vertical axis, it may obstruct the flow of grass clippings cut and released by the cutter, and the blower case has the disadvantage that it protrudes outward by a large amount. It was hot. In addition, since the lower surface of the blower case is flat, there are problems in that it is difficult to follow the ground, such as the front edge of the case scraping off protrusions on the ground.

Therefore, this invention solves the above problems and also
The purpose is to prevent grass clippings from clogging.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above object is to release grass clippings on one side of the mower deck 9 so as to release the grass clippings outward in the left and right direction. A case body 2 provided with an outlet 21 and a suction port 27 that faces and communicates with the grass clippings discharge port 21.
In the mower grass collection device, the impeller 25 is provided with a grass clipping outlet 21 and the grass clippings are collected into the grass collection box through the ducts 48 and 51 by the rotation of an impeller 25 provided in the case body 23. The blade is rotatable around a horizontal axis 24 in the direction in which the grass clippings are discharged from the impeller 25 to the suction port 27 of the case body 23. The impeller 25 is located between the suction side surface and the inner surface of the case body 23 facing thereto.
The space from the rotation direction suction port 27 to the duct 48 is formed wide, and the grass discharged from the grass discharge port 21 is sucked and guided to the duct 48 by the airflow discharged from the impeller 25 and flowing through the duct 48. It is located at the point where it is said to be a guide passage 36.

(Function) When mowing lawns, cutter 1 of mower 8
0 rotates around the cutter shaft 12, and the cutter 10
The grass clippings that were cut at
Send to 1. On the other hand, the impeller 25 of the cut grass feed device 22 rotates around the horizontal axis 24 in the cut grass discharge direction, and the cut grass sent to the discharge port 21 is passed through the suction port 27 of the case body 23 to the rotation center of the impeller 25. Suction from, discharge in tangential direction, ducts 48, 51
After that, the grass is sent to the grass collection box 52. At this time, due to the air flow caused by the rotation of the impeller 25, some of the grass clippings pass through the guide passage 36 and into the duct 4.
It is sent to the 8th, 51st side.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 5, 1 is a vehicle body having front wheels 2 and rear wheels 3. 4 is a bonnet, 5 is a handle, 6 is a step, and 7 is a seat. 8 is car body 1
The mower is disposed below the vehicle body 1 and is attached to the vehicle body 1 between the front and rear wheels 2 and 3 so as to be movable up and down, and is constructed as follows.

That is, as shown in FIGS. 1 to 3, the mower 8 is constructed by disposing cutters 10 on a mower deck 9 so as to be located in the center and on both sides thereof. The mower deck 9 has a mountain shape in which the front center of the mower deck 9 protrudes forward, and a cut grass passage 11 that protrudes upward is provided on the front edge side of the mower deck 9, as shown in FIG. 10 cutters each
is rotatably supported on the mower deck 9 via a vertical cutter shaft 12, and is rotationally driven by the cutter shaft 12 at the center of the mower deck 9 via a pulley 13 and a belt 14. The central cutter shaft 12 is connected to the transmission case 1 as shown in Fig. 4.
5 and is interlocked and connected to an input shaft 18 via bevel gears 16 and 17 within the transmission case 15. The input shaft 18 is connected via a joint (not shown).
It is interlocked and connected to the front PTO shaft at the front of the vehicle body 1. The transmission case 15 is a PTO that protrudes rearward and laterally.
It has a shaft 19 which is coupled to the bevel gear 16 via a bevel gear 20.

The grass clippings passage 11 is for sending the grass clippings cut by the cutter 10 and lifted by the wind generated by the wind raising part 10a to the grass clippings outlet 21 on the left and right sides of the mower deck 9, and is used to discharge the grass clippings. Opposed to the outlet 21 is a horizontally rotatable grass feeder 22 .

The grass clippings feeding device 22 includes a case body 23 that is substantially circular in side view, and an impeller 25 supported within the case body 23 by a horizontal shaft 24 in the grass clipping discharge direction. The case body 23 is provided with a suction port 27 on the lower half side of the inner plate 26, which communicates with the grass clippings discharge port 21.
8. And impeller 2
The suction port 27 is located on the lower half side of the rotation center of the blade 5, and the suction port 27 is located at the center of the grass discharge port 21 in the front-rear direction. Further, a mounting frame 31 in the front and rear direction is provided on the inner plate 26 of the case body 23 via a pair of front and rear support brackets 29 and 30, and the mounting frame 31 is detachably attached to the mower deck 9 with four bolts 32. It is being

The impeller 25 has a flange plate 34 and a plurality of guide vanes 35 provided on the flange plate 34.

Further, the space between the grass grass suction side surface of the impeller 25 and the inner surface of the case body 23 opposing this, from the rotation direction suction port 27 of the impeller 25 to the duct 48 is formed wide, and the space between the duct 48 side and the duct 48 side is formed wide. A guide passage 36 that communicates directly is formed.

The horizontal shaft 24 is rotatably supported by an outer plate 39 of the case body 23 via a bearing case 38, and a pulley 40 is provided at the outer end of the horizontal shaft 24. A transmission shaft 42 is mounted parallel to the horizontal shaft 24 on the rear side of the case body 23 via a bearing case 41, and the transmission shaft 42 is interlocked and connected to the PTO shaft 19 via a universal joint 43. Further, the transmission shaft 42 is operatively connected to a pulley 40 via a pulley 44 and a belt 45. Furthermore, belt 4
A tension pulley 46 is in elastic contact with 5.

A discharge port 47 is provided on the upper side of the case body 23 in a tangential direction and inclined rearward and upward at approximately 45 degrees, and a linear duct 48 is attached to the discharge port 47. A charging duct 51 is swingably connected to the upper end of the duct 48 via a ball joint 49 and a pin 50. The input duct 51 is formed in an arc shape so as to draw a parabola, and this input duct 51 is loosely inserted into the opening 53 of the grass collection box 52 and is movably collected via a rubber plate 54. grass box 5
It is supported by 2. In addition, 55 is cutter 10
In the rear guide plate, 56 is a gauge wheel for adjusting cutting height, and 57 is a limit gauge wheel.

In the above configuration, when mowing the lawn etc., the cutter 10 of the mower 8 is moved to the cutter shaft 12.
Rotate the cutter 10 in the direction of arrow a.
Cut grass such as lawn with cutter 10.
The grass clippings are lifted by the wind generated by the wind blowing section 10a, and are sequentially sent in the direction of arrow b along the passageway 11 to the grass clipping outlet 21.

On the other hand, the impeller 25 of the grass clippings feeding device 22 is driven to rotate in the direction of arrow c around the horizontal shaft 24 from the PTO shaft of the transmission case 15 via the joint 43, transmission shaft 42, pulleys 44, 40, belt 45, etc. At the time of mowing, the grass clippings feeding device 22 is operated at the same time to suck the grass clippings and forcibly feed the clipped grass through the ducts 48 and 51 to the grass collection box 52. That is, when the impeller 25 rotates, the grass clippings that have been sent to the discharge port 21 side of the passage 11 are sucked into the case body 23 from the suction port 27, and are transferred to the discharge port 47 while rotating along the inner peripheral surface of the case body 23. is discharged to the duct 4
8 and 51, and then sent to the grass collecting box 52. Therefore, the grass clippings feeding device 22, which can collect grass at the same time as mowing, is of the horizontal shaft type, and the grass clippings sent from the passage 11 are fed along the horizontal shaft to the suction port.
There is no accumulation of grass clippings at the discharge port 21, and the grass clippings flow smoothly. Moreover, not only is the grass clippings simply discharged to the discharge port 47 side by the rotation of the impeller 25, but also some of the grass clippings is passed through the guide passage 36 and into the duct 48 due to the air flow caused by the rotation of the impeller 25.
Therefore, a large amount of grass clippings can be transported, which also prevents the grass clippings from clogging and allows the grass clippings to flow smoothly.

In addition, since the grass clippings sucked in in the axial direction are discharged from the discharge port 47 in the tangential direction, there is no restriction on the directionality of the discharge port 47, and the ducts 48 and 51 can be arranged in an inclined shape to match the position of the grass collecting box 52. It is possible to provide a design that allows grass clippings to flow easily.
The cut grass feeding device 22 may have a small axial dimension. Therefore, by using a horizontal shaft type, the amount of outward protrusion in the left and right direction is reduced, and mowing work can be performed near obstacles. Since edge cutting is possible, the area that cannot be harvested becomes extremely small.

When the vehicle body 1 travels in accordance with the work, the mower 8 and the grass feeder 22 also move up and down following the ground. At this time, since the lower side of the case body 23 is circular, there is no need to scrape off soil even in the raised portions, resulting in good followability. When the grass clippings feeding device 22 moves up and down, the duct 48 supported by it also moves up and down, but since it is connected to the duct 51 via the ball joint 49 and the pin 50, both the ducts 48 and 48 move around the pin 50. 51 is bent, and since the duct 51 is supported by the grass collecting box 52 via the rubber plate 54 and is swingable, the vertical movement of the grass feeder 22 is not hindered. If the duct 51 is curved into a parabolic shape, the grass clippings will flow very smoothly.

(Effects of the invention) According to the invention, a horizontal shaft-type grass clippings feeding device is provided to suck grass clippings in the axial direction and discharge them in the tangential direction, so the amount of protrusion outward in the left and right direction can be reduced. At the same time, there is no clogging of grass clippings in the grass cutting discharge section, and the grass flows smoothly. In addition, it is possible to make the lower surface of the case body of the grass clippings feeding device circular.
Improves the ability to follow the ground and prevents earth scraping.

Furthermore, the space between the grass cutting suction side surface of the impeller and the inner surface of the case body opposing this, from the suction port in the rotating direction of the impeller to the duct, is formed wide and serves as a grass cuttings guiding passage. The air flowing through the duct creates a flow of air from the suction port toward the duct through the guide passage, and an air film is formed on the outer periphery of the grass cuttings suction side of the impeller, which removes the grass clippings. Even if a large amount of grass clippings is released, the grass clippings that cannot be sucked in by the impeller will flow into the duct through the guide passage. As a result, a large amount of grass clippings can be conveyed from the grass clippings outlet to the duct, which has the advantage of preventing clogging of grass clippings and smoothing the flow of the grass clippings.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway plan view, Fig. 2 is a plan view of the main parts, Fig. 3 is a partially cutaway rear view, and Fig. 4 is a configuration diagram of the power system. , FIG. 5 is a side view of the whole. 1... Vehicle body, 8... Mower, 9... Mower deck, 10... Cutter, 11... Clipped grass passage, 21
...Cut grass discharge port, 22...Cut grass feeding device, 23...
...Case body, 24...Horizontal shaft, 25...Impeller,
36... Guide path, 48... Duct, 51... Input duct, 52... Grass collecting box.

Claims (1)

[Claims for Utility Model Registration] A grass clippings discharge port 21 is provided on one left and right side of the mower deck 9 to discharge grass clippings outward in the left and right direction, and a suction port 21 is provided opposite to and communicating with the clipped grass discharge port 21. In the mower grass collection device, a case body 23 having a mouth 27 is provided, and grass clippings are collected into a grass collection box through ducts 48 and 51 by rotation of an impeller 25 provided in the case body 23, as described above. The impeller 25 is rotatable around a horizontal axis 24 in the direction in which the grass clippings are discharged from the grass clippings discharge port 21 to the suction port 27 of the case body 23, and is capable of sucking the grass clippings from the center of rotation and discharging them in the tangential direction. The impeller 25 is located between the mowed grass suction side surface of the impeller 25 and the inner surface of the case body 23 opposite thereto.
The space from the rotation direction suction port 27 to the duct 48 is formed wide, and the grass discharged from the grass discharge port 21 is sucked and guided to the duct 48 by the airflow discharged from the impeller 25 and flowing through the duct 48. A mower grass collecting device characterized by having a guide path 36 for moving.