JPH09121644A - Lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lawn mower having improved reaping workability with suppressing remainder of reaping in the revolving without inducing time lag by constituting right and left a pair of side reel mowers to be changeable of the position to the inner side of the machine body. SOLUTION: This lawn mower has a center reel mower 9a at a front part of the machine body and right and left a pair of side reel mowers 9b at a rear part of the center reel mower 9a in partially overlapped state with the center reel mower 9a in a transverse direction, and the right and left a pair of side reel mowers 9b are constructed to be changeable to the inner side of the machine body. Preferably, the right and left a pair of side reel mowers 9b are interlocked to a steering operation of a revolution of the machine body to be changeable of the position to the inner side of the machine body in proportional to increase of the steering operation amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawnmower equipped with a reel mower rotatable about a horizontal axis.

[0002]

2. Description of the Related Art In a conventional reel mower type lawnmower, as shown in Japanese Patent Laid-Open No. 6-62635, three reel mowers are formed in a triangular shape, and side reel mowers are arranged in the left-right direction with respect to a center reel mower. Partly wrapped and fixedly placed.

[0003]

Since the side reel mower is partially wrapped in the left-right direction with respect to the center reel mower, no uncut residue is generated during straight cutting work, and good lawn mowing work can be performed. However, during mowing work by turning, there is a problem that uncut remains between the turning locus drawn by the rear end of the center reel mower and the turning locus drawn by the tip of the side reel mower with the wheel inside the turning as a fulcrum. It was

An object of the present invention is to suppress uncut residue during turning.

[0005]

According to a first aspect of the present invention, a center reel mower is arranged in a front portion of a machine body, and a pair of left and right side reel mowers are provided behind the center reel mower. In a lawn mower arranged so as to partially wrap around the center reel mower in the lateral direction of the machine body, the pair of left and right side reel mowers are configured so that their positions can be changed toward the inside of the machine body. [Operation] When the machine body is swung to perform a mowing operation, the pair of left and right side reel mowers are moved toward the inside of the machine body to increase the amount of lap with the center reel mower.
Then, the interval between the turning locus drawn by the rear end of the center reel mower and the turning locus drawn by the tip of the side reel mower with the wheel on the inside of the turning as a fulcrum becomes narrow, and the uncut portion becomes small. [Effect] As described above, the position of the side reel mower can be changed to the inner side of the machine body, so that it is possible to suppress the uncut portion when turning.

According to a second aspect of the present invention, the pair of left and right side reel mowers are configured to be capable of changing their positions toward the inside of the body as the steering operation amount increases in association with the steering operation for turning the body. [Operation] When the steering wheel is operated, the rear reel mower is automatically repositioned toward the inside of the machine in proportion to the steering operation amount. [Effect] Compared to the case where the steering operation and the reel mower position changing operation are performed separately, good mowing work can be performed without causing a timing shift.

According to the third aspect of the present invention, the side wall of the reel deck is recessed toward the inside of the machine body, and the motor for driving the reel mower is housed in the recess. [Operation] Since the side wall of the reel deck is recessed toward the inside of the machine body and the motor for driving the reel mower is housed in the recessed portion, as shown in FIG.
When the removable grass clippings box b shown in phantom is attached to the front of a, 9b, 9b, the center reel mower 9a
Reel mower drive motor 10 mounted on the left side wall of the vehicle
The capacity of the grass clippings storage box b of the left side reel mower 9b can be increased by the storage amount of a. [Effect] As a result of the configuration described above, when attaching a removable grass clippings storage box to the front part of the reel mower, a large-capacity grass storage box can be attached.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an entire lawn mower, which includes a non-steering front left and right front wheel 2 equipped with a differential device, left and right rear wheels 3 steerable by a power steering device, a steering handle 4, At the front of the traveling machine body 1 including the operation seat 5, the engine 6, and the like, a reel-type mower M is vertically movable via an elevating link 8 that is vertically driven by a hydraulic cylinder 7.

As shown in FIG. 2, in the reel type mower M, a center reel mower 9a is arranged at the center of the front portion of the machine body, and a pair of left and right side reel mowers 9 are provided obliquely rearward thereof.
b and 9b are arranged so as to partially overlap the center reel mower 9a in the lateral direction of the machine body. The reel mowers 9a, 9b, 9b are rotationally driven by hydraulic motors 10a, 10b, 10b mounted on the side surfaces of the reel deck, respectively. , Are connected and driven in series.

The center reel mower 9a is pivotally connected to the tip of an elevating link 8 which is driven to move up and down by a hydraulic cylinder 7, and the pair of left and right side reel mowers 9b and 9b are connected to the elevating link 8. The pair of left and right swing arms 11, 11 that are swingably supported in the left and right directions are respectively pivotally connected to the tips.

The pair of left and right side reel mowers 9b,
The center reel mower 9a is configured so that its lap amount can be changed. That is, the hydraulic cylinder 12 is installed over the pair of right and left swing arms 11,
The hydraulic cylinder 12 is configured to be capable of contracting in conjunction with the steering operation accompanying the turning operation of the machine body, and the pair of left and right side reel mowers 9b and 9b are respectively arranged so that the lapping amount increases as the steering operation amount increases. The position is changeable toward the inside of the body.

Next, the control device for changing the lap amount in conjunction with the steering operation will be described. As shown in FIG. 4, a potentiometer 13 for detecting the steering angle of the steering wheel 4 is provided and the lap amount is changed. A stroke sensor 14 for detecting the operation amount of the cylinder 12 is provided, and the detection signals from these sensors 13, 14 are input to the control device 15, and based on the detection signal from the potentiometer 13 and the feedback signal from the stroke sensor 14. The electromagnetic proportional flow rate control valve 15 of the lap amount changing cylinder 12 is configured to be operable. In such a case, when the hydraulic cylinder 12 is contracted, the pair of right and left swing arms 11 and 11 swings the swing arms 11 and 11, respectively.
The occlusal gears 20 and 20 provided on the pivot shafts of the above-mentioned ones swing and drive the left and right evenly. In such a case, the pair of left and right swing arms 11, 11 causes the pair of left and right side reel mowers 9b, 9b to approach the back surface of the center reel mower 9a, so that the uncut portion during turning of the machine body is further reduced. It will be possible.

Next, the mounting structure of the reel mower drive motor 10 will be described. Since the reel mower driving motor 10 has the same mounting structure, the description will be made below for one side reel mower. As shown in FIGS. 5 and 6, the outermost disc 17a on the motor mounting side of the reel 17 is formed in a donut shape having a hole for inserting the motor in the center, and the reel deck 1 facing this is formed.
The side wall 6 is recessed toward the inside of the body to form a recessed portion 18. The recess 18 is formed by forming a motor insertion hole in the side wall of the reel deck 16 and inserting the holder 18 into this hole. The holder 18 is fixedly connected to the side wall of the reel deck 16 via bolts. The reel mower drive motor 10 is housed in the recess of the holder 18. The drive shaft of the motor 10b and the rotation shaft of the reel 17 are integrally rotatable via a coupler 19.

[Other Embodiment] In the above embodiment, the lap amount changing cylinder is operated in conjunction with the steering operation, but the lap amount changing cylinder may be operated independently.

In the above embodiment, the steering angle of the steering wheel is detected and the lap amount changing cylinder is operated, but any means for detecting the steering angle may be used.

Further, a pair of right and left swing arms 11, 11
The cylinder 12 installed on the upper and lower sides is configured to be operable. However, a pair of left and right cylinders are arranged in a V shape in front of the swing fulcrum of the pair of left and right swing arms 11, 11 to form a pair of left and right swing arms 11. , 11 may be configured to be capable of being driven equally in the left and right by 1/2 in conjunction with the steering operation.

Further, in the above embodiment, the pair of left and right swing arms 11, 11 moves the pair of left and right side reel mowers 9b, 9b forward along with the movement toward the inside of the body. Although a guide rail orthogonal to the left-right direction is provided with respect to the elevating link 8, a pair of left and right hydraulic cylinders are provided along the guide rail, and the left and right hydraulic cylinders are independently or simultaneously driven to move to the left and right. The pair of side reel mowers 9b, 9b may be configured so that the slide position can be changed only in the lateral direction of the machine body.

Further, in the above embodiment, when the side wall of the reel deck is recessed toward the inside of the machine body, the recess portion is formed by using the detachable holder on the reel deck. You may form it.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a lawn mower.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic view showing an operating state of the reel mower.

FIG. 4 is a block diagram of control.

FIG. 5 is an exploded perspective view of a reel mower.

FIG. 6 is a vertical sectional view of the reel deck.

[Explanation of symbols]

 9a Center reel mower 9b Side reel mower 10 Reel mower drive motor 16 Reel deck 18 Reel deck sidewall recess

Claims (3)

[Claims] 1. A center reel mower (9) is provided on a front portion of an airframe.
a) is installed and the center reel mower (9
Behind a), a pair of left and right side reel mowers (9
b) and (9b) are arranged so as to partially overlap the center reel mower (9a) in the lateral direction of the machine body, the left and right side reel mowers (9b) and (9b) ) Is a lawn mower whose position can be changed toward the inside of the machine. 2. The pair of left and right side reel mowers (9)
The lawn mower according to claim 1, wherein the positions (b) and (9b) are configured so that the position can be changed toward the inside of the machine as the steering operation amount increases in association with the steering operation for turning the machine. 3. The reel mower driving motor (10) is housed in the recessed portion (18) of the reel deck (16) with the side wall thereof recessed toward the inside of the machine body. The lawn mower described in 2.