JPH11253026A - Lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lawn mower that can transfer the cut lawn grass to the grass collection vessel. SOLUTION: A pair of the left and right cutting blades 9A and 9C are arranged in the housing case 11 that is set to the running machine body, and the third cutting blade 9c is set in the front side of these left and right blades between them. Among these three cutting blades, 9A, 9B and 9C, one blade of the right or the left edge side and the center blade are driven in the same direction, while the left blade and the right blade are driven to the reverse direction to each other. The duct inlet 10 for introducing the cut lawn grass is opened at the place at which the rotary traces between one edge rotary blade 9C and the center rotary blade 9B oppose to each other and deviates from the widthwise center and a duct is obliquely extended from the inlet duct 10, further the duct 10 is further extended over the widthwise center of the running machine to the other side and the end of the duct is connected to the cut grass collection vessel set to the rear of the running machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing case mounted on a traveling machine body, which includes a pair of left and right blade cutting blades.
And, while accommodating and disposing one blade cutting blade arranged on the front side in the middle of the pair of left and right blade cutting blades,
The present invention relates to a lawn mower provided with a duct for sending grass clippings from a housing case to a grass collection container.

[0002]

2. Description of the Related Art Conventionally, as a lawn mower of this type, as shown in FIG. 3, for example, a lawn mower cut by three blades 9A, 9B and 9C of a lawn mower 7 is attached to the rear of the machine body. It is known that grass is collected through a duct 10 in an equipped grass collection container 8. In this case, the duct 10 is located near the center of the housing case 11 in the lawn mower 7 in the left-right direction, that is, near the center line CL of the aircraft.
Among the three blade cutting blades 9A, 9B, 9C, a central blade cutting blade 9B and a blade cutting blade 9C on one side, which is driven to rotate in a direction opposite to the blade cutting blade 9B, in the rotation locus. In order to guide the cut grass from the opposing part and send it to the back, it was configured to be connected to the grass collection container in a state of extending rearward in the front-rear direction.

[0003]

However, in the above-mentioned conventional lawn mower, the entrance 12 for introducing the lawn grass of the duct 10 is somewhat widened in a trumpet shape, and extends from the blade cutting blade 9C on one side. The cutting blade 9C and the cutting blade 9B at the center are cut to the inner wall 10a of the duct 10 even if the cutting blade 9C or the blade 9B at the center is cut. Since the turf was hit in a state where the turf collided, the colliding turf was likely to be stuck to the rearward feeding, and there was a risk of clogging or the like. It was hoped that improvements would be made.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lawn mower capable of smoothly sending cut grass to a grass collection container.

[0005]

According to a first aspect of the present invention, there is provided a lawn mower comprising three blade cutting blades, a pair of left and right blade cutting blades, and a pair of left and right blade cutting blades. And a single blade cutting blade arranged at the front of the center of the three blade cutting blades and housed in the housing case. The rotation direction of the blade cutting blade is set to be the same, the rotation direction of one blade cutting blade on the left and right side is set to the opposite direction, and the rotation direction of the blade cutting blade on the other side and the central blade cutting blade are set. At a location offset to one side in the left and right direction opposite to each other on the rotation locus, a duct is provided for guiding grass clipping obliquely rearward along the tangential direction of the rotation locus,
The duct extends to the other side in the left-right direction beyond the left-right center of the fuselage, and the end of the duct is connected to a grass collection container mounted on the rear of the fuselage.

(Operation) According to the structure of the first aspect of the present invention, the rotation locus of the cutting blade at the point where the center blade cutting blade and the blade cutting blade having a different rotation direction face each other is: In plan view, because the obliquely rearward, that is, the opposing portion is offset (deviation) to one side from the center position in the horizontal direction of the aircraft, the cut grass that flows tangentially from that offset position is The duct is formed so as to guide along the flow. The duct extends obliquely rearward beyond the center of the fuselage in the left and right direction to the other side, so that a relatively long distance of grass clippings can hit the wall of the duct. It can be transported smoothly in a suppressed state, and the direction of the cut grass is changed relatively slowly as much as possible near the grass collection container. It is difficult to hinder.

(Effect) Therefore, according to the configuration of the first aspect of the present invention, the lawn grass is smoothly guided by the duct from the central blade blade and the blade blade on one side to the grass collecting container. As a result, it is possible to suppress the backlash of the feed caused by the collision with the inner wall of the duct in feeding the cut grass by the duct, and to improve the feeding performance.

(Structure) According to a second aspect of the present invention, in the lawnmower according to the first aspect, a transmission case that transmits power to a pair of left and right rear wheels and the duct are arranged separately on the left and right. This is a characteristic configuration.

(Operation) According to the configuration of the second aspect of the present invention, the transmission case is allocated so that the transmission case is located on the side where there is no duct in accordance with the displaced arrangement of the duct in the lateral width direction of the body. Can be placed.

(Effect) Therefore, according to the configuration of the second aspect of the present invention, the transmission case and the duct can be compactly arranged because the arrangement space for the duct can be secured well.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a riding lawn mower. This lawn mower is equipped with an engine 4 mounted on a front portion of a body 3 movably supported by a pair of left and right front wheels 1, 1 and rear wheels 2, 2, and a transmission on a rear side passes below a riding operation unit 5. It is configured to be axially transmitted to the case 6. Further, a lawn mowing device 7 is disposed in the lower abdomen space of the body between the front wheels 1, 1 and the rear wheels 2, 2, and the lawn mower cut by the lawn mowing device 7 is located behind the body 3 It is fed through a duct 10 and stored in a grass collection container 8 provided at the end.

As shown in FIG. 1 and FIG.
In the housing case 11, three blade cutting blades 9A, 9B, 9C rotatably driven around a vertical axis are supported in the housing case 11 by suspending the housing case 11 with a link mechanism or the like. It is arranged and configured.
Of the three blade cutting blades 9A, 9B, 9C, the left and right pair of blade cutting blades 9A, 9C located on the rear side are rotated clockwise in plan view as shown in FIG. The right side is rotated counterclockwise in plan view. Further, the central blade cutting blade 9B located on the front side in a state positioned between the pair of left and right blade cutting blades 9A and 9C in the left and right direction is rotated clockwise in plan view.

As shown in FIG. 2, the central blade 9
B and the cut grass are guided obliquely rearward and leftward through the opposing portions of the respective rotation trajectories of the blade cutting blade 9C and the right blade cut blade 9C, and serve as a cut grass introduction port for receiving the cut grass. The starting end of the duct 10 is arranged such that the opening 12 is desired. This duct 10
Are arranged in such a state that the cut grass is transferred diagonally to the left and rearward of the opposing position at a position deviated to the right from the center position in the lateral direction of the body. A guide portion 10A toward the rear left side of the duct 10 extends to the vicinity of the left rear wheel 2 which is deviated to the left side from the center position (center line CL in FIG. 2) of the body in the left-right direction. The duct 10 between the position near the rear wheels 2 and 2 of the guide 10A and the grass container 8 is constituted by a guide 10B extending in the front-rear direction. Therefore, the guide part 10B on the latter half side has the entire center line C
It is located to the left of L. This duct 10
The transmission case 6 from which the axles 2a, 2a of the pair of left and right rear wheels 2, 2 protrude with respect to the guide portion 10B of Since the transmission case 6 and the transmission case 6 are respectively arranged left and right, the transmission case 6 is compactly arranged.

With the above configuration, each blade cutting blade 9A, 9
B, 9C, the turf cut off is guided in the housing case 11 in a floating state with the rotation of the blade cutting blades 9A, 9B, 9C.
B and the right blade cutting blade 9C are guided to opposing portions of the rotation locus, and both blade cutting blades 9B, 9B,
The cut grass is introduced into the duct 10 in a state where the collision of the cut grass with the inner wall of the duct 10 is suppressed in the vicinity of 12 openings thereof along the tangent direction at the position opposite to the rotation locus of 9C. Then, the cut grass is guided toward the left side of the body by the guide portion 10A of the duct 10, and then guided by the guide portion 10B toward the grass collection container 8.

[Other Embodiments] In the above embodiment, only three blade cutting blades are provided inside the housing case. However, four or more blade cutting blades are provided inside the housing case. A configuration having the above configuration may be used. In this case, even in this case, there is a configuration in which the three blade cutting blades are arranged, and a configuration in which another blade cutting blade is additionally provided. The present invention can be applied to a configuration in which different blade cutting blades are arranged on the left and right end sides.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a riding lawn mower.

FIG. 2 is a partially cutaway plan view showing a mowing turf transport structure of a riding lawn mower.

FIG. 3 is a partially cutaway plan view showing a lawn mower transport structure of a conventional riding lawn mower.

[Explanation of symbols]

 2 Rear wheel 6 Mission case 8 Grass collection container 9A, 9B, 9C Blade cutting blade 10 Duct 11 Housing case 12 Cut grass introduction port

Claims (2)

[Claims] 1. A pair of left and right blade cutting blades and a single blade cutting blade arranged in front of the middle of the pair of left and right blade cutting blades are housed and arranged in a housing case mounted on the traveling body. At the same time, of the three blade cutting blades, the left and right ends and the central blade are rotationally driven in the same direction, and the blade cutting blades on the left and right other ends are rotationally driven in opposite directions,
In addition, the turf introduction ports are located at positions where the rotation trajectories of the blade cutting blade on the other end side and the central blade cutting blade are deviated to one side from the left and right centers of the traveling body facing each other. A duct for guiding grass clipping obliquely rearward along the tangential direction of the rotation locus is provided, and the duct extends to the other side in the left-right direction beyond the left-right center of the traveling body, and the end of the duct is A lawn mower connected to a grass collection container mounted on the rear of the vehicle. 2. The lawn mower according to claim 1, wherein the duct and a transmission case to be transmitted to the rear wheels are separately arranged in a lateral direction between a pair of left and right rear wheels in the traveling body.