JPH10201323A - Mowing equipment - Google Patents

Abstract

(57) [Summary] [Problem] To suppress rolling of a reel mower during turning and mowing. SOLUTION: A reel mower 1 capable of rolling around a longitudinal axis is mounted on a tip of a lift arm 6 so as to be yawable around a longitudinal axis Y.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing device having a reel mower mounted on a front portion of an airframe.

[0002]

2. Description of the Related Art Generally, a reel mower is rotatably mounted on the tip of a lift arm so as to follow irregularities on the ground.

[0003]

When a mowing operation is performed while turning the machine body, the tip of the machine body is turned to the turning center side in accordance with the steering operation, so that a centripetal force is generated at the front end of the machine body. Then, the reel mower rolls due to the ground resistance and the resistance of the turf from the side surface. As a result, there is a problem that the cutting marks are not uniform in the left and right directions, and there is room for improvement.

An object of the present invention is to eliminate the above-mentioned disadvantages by a simple structural improvement.

[0005]

According to the first aspect of the present invention, a reel mower is attached to the tip of a lift arm so as to freely yaw around a vertical axis. [Operation] According to this configuration, when the tip of the machine body is turned to the turning center side in accordance with the steering operation during the cutting operation while turning, the reel mower is turned by the ground resistance,
In addition, due to the resistance of the turf from the side surface, a turning moment acts on the reel mower whose traction point and the ground contact point are different in the front-rear direction around the vertical axis, and the reel mower yaws around the vertical axis in a horizontal position with respect to the ground. As a result, the rolling of the reel mower is suppressed. Further, the reel mower yaws so that the rotation axis of the reel cutter follows the radiation from the center of rotation. [Effect] According to the first aspect of the present invention, the rolling of the reel mower is suppressed during the cutting operation while turning,
Irregularities of the mowing marks in the left-right direction are suppressed, and the mowing marks become beautiful.

According to a second aspect of the present invention, a stopper for regulating the yawing range of the reel mower is provided. [Operation] According to this configuration, the operation is the same as that of the first aspect of the invention, and furthermore, the yaw of the reel mower more than necessary, that is, the rotation axis of the reel cutter is suppressed more than the radiation at the center of rotation. [Effects] According to the second aspect of the present invention, the above-described effects of the first aspect of the present invention are provided, and furthermore, unnecessarily yawing of the reel mower is suppressed, resulting in a more beautiful finish.

According to a third aspect of the present invention, the stopper comprises a pair of right and left adjust bolts arranged on both sides of the longitudinal axis. [Operation] According to this configuration, in the same manner as the invention according to claim 1, when turning and mowing at a high speed by a pair of left and right adjusting bolts, the yawing range of the reel mower is increased, and regulation by the adjusting bolts is performed. The rotation mowing can be performed by yawing the reel mower without receiving the rotation, and the yawing of the reel mower can be locked during the straight cutting. [Effect] According to the third aspect of the invention, the above-mentioned effect of the first aspect of the invention is provided, and the yawing range can be changed according to the turning speed, as compared with a fixed type yawing stopper. At the time of straight cutting, the yaw of the reel mower is locked so that good straight cutting can be performed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a riding lawn mower as a mowing device equipped with three reel mowers 1, 2, 2 at the front of a traveling body A. The traveling body A has a front wheel 3
And the rear wheel 4 is driven and the steering wheel 5
Thereby, the rear wheel 4 is configured to be steerable. A center mower 1 disposed at the center of the right and left sides of the fuselage and a pair of left and right side mowers 2 and 2 disposed on both left and right sides behind the center mower 1 are provided around the front and rear axes X at the tips of the lift arms 6, 7, and 7, respectively. It is mounted so that it can freely roll and yaw freely around the vertical axis Y.

[0009] As shown in FIG.
Lift arm 6 is pivotally supported by a bracket 8a at the front of the traveling body so as to freely swing up and down around a horizontal axis P1, and a hydraulic cylinder 9 spanned between the lift arm 6 and the bracket 8b at the front of the body. It is configured to be able to drive up and down. The lift arm 7 of the side mower 2 is pivotally supported by a bracket 8c on the lateral side of the traveling body so as to freely swing up and down around a longitudinal axis X1. It is configured to be able to be driven up and down by a hydraulic cylinder 10 spanned thereover.

The center mower 1 and the side mower 2 include a cutter case 11, a reel cutter 12 rotatable around a horizontal axis, a fixed cutter 13, a grooved roller 14 for adjusting the cutting height, a ground roller 15, and a suspension frame. 1
6, a support rod 17 mounted on the suspension frame 16 so as to be able to yaw freely around the longitudinal axis Y, and a pair of left and right links 18, 18 spanning the suspension frame 16 and the upper part of the cutter case 11. Have been.

The hanging frame 16 extends over a pair of left and right links 16a, 16a rotatably supported on the side wall of the cutter case 11 around a horizontal axis P2, and over the pair of left and right links 16a, 16a. It comprises a pipe frame 16b that is erected and a support rod mounting bracket 16c provided at the left and right center of the pipe frame 16b. The support rod 17 includes a bracket 17a having a U-shape in a side view, a sleeve 17b fixed to the rear wall of the bracket 17a, and a rod 17c internally fitted and fixed to the sleeve 17b via a pin. Reference numeral 17a is connected to the bracket 16c of the pipe frame 16b via pins 19 so as to freely yaw around the longitudinal axis Y.

As shown in FIG. 4, a pair of right and left adjustment bolts 20 as stoppers capable of contacting the pipe frame 16b of the suspension frame 16 are provided on both sides of the rear wall of the bracket 17a of the support rod 17. The yaw ranges of the reel mowers 1 and 2 can be adjusted by adjusting the adjustment bolts 20 and the yaw lock can be performed. A link 1 spanning a pair of left and right links 16a, 16a of the hanging frame 16 and an upper portion of the cutter case 11.
8 has a long hole 18a, and when the mower pitching around the horizontal axis P2 is raised to the ground, the rotation of the mower around the horizontal axis P2 is regulated.

The support rod 17 of the center mower 1
Is fitted inside the boss 6a at the tip of the lift arm 6 so as to freely roll around the longitudinal axis X, and a retaining ring 17d is externally fitted and fixed to the rear end of the rod 17b via a pin. The support rod 17 of the side mower 2 is also fitted inside the boss 7a at the tip of the lift arm 7 so as to freely roll around the longitudinal axis X. A pair of left and right stoppers 17e, 17e, which contact the side surface of the lift arm 6 and regulate the rolling range of the center mower 1, are fixed to the sleeve 17b of the support rod 17 of the center mower 1.

In this riding lawn mower, as shown in FIGS. 5 and 6, a rolling lock mechanism 21 is provided which can maintain the attitude of the side mower 2 in an outwardly inclined position when the ground is raised above the ground. The rolling lock mechanism 21 includes a lock pin 2 attached to a boss 7 a at the tip of the lift arm 7.
2 and an engagement plate 23 having a lock pin engagement hole attached to the sleeve 17b of the support rod 17. The lock pin 22 is a lock pin case 2
Coil spring 24 externally fitted to lock pin portion in 2a
, And by being engaged with a stopper 22b formed of a plate provided on the lock pin case 22a, the engagement can be maintained against the urging force of the spring 24. The lock pin 22 does not come into contact with the engagement plate 23 when the lift arm 7 is lowered.

According to the above structure, as shown in FIG. 7, when the rear wheel 5 is steered for turning and mowing, the tip of the body turns inside the turning radius in accordance with the steering operation. The reel mowers 1, 2, and 2, which generate centripetal force toward the turning center side and are in contact with the ground,
Due to the ground resistance and the resistance from the side surface due to the turf, the vehicle is yawed about the vertical axis Y in a horizontal attitude with respect to the ground, and the rolling of the reel mowers 1, 2, 2 around the front and rear axis X is suppressed. . Each of the reel mowers 1, 2, 2 yaws so that the axis of rotation of the reel cutter follows the radiation from the center of rotation.

[Other Embodiments] In the above embodiment, the stopper for regulating the yawing range of the reel mower is constituted by a pair of right and left adjustment bolts. However, a pair of left and right pins are provided on the inner surface of the rear wall of the bracket of the support rod. It may be constituted by a fixed stopper which is fixed.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a riding lawn mower.

FIG. 2 is a side view of the same.

FIG. 3 is a partially broken side view showing a mounting structure of a reel mower.

FIG. 4 is a plan view of the same.

FIG. 5 is a partially broken plan view showing an operation state and a non-operation state of a lock mechanism of a side mower.

FIG. 6 is a front view of the same.

FIG. 7 is a plan view showing an aircraft turning state.

[Explanation of symbols]

 1 Reel mower 6 Lift arm 20 Stopper Y Yaw axis

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Ezaki 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (3)

[Claims] 1. A mowing device having a reel mower that can freely roll around a longitudinal axis and is attached to the tip of a lift arm so that it can yaw freely around the longitudinal axis. 2. The mowing apparatus according to claim 1, further comprising a stopper for regulating a yawing range of the reel mower. 3. The mowing apparatus according to claim 2, wherein the stopper comprises a pair of left and right adjusting bolts arranged on both sides of the longitudinal axis.