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Rotary cutter for brush cutter

A technology of rotary cutting and lawn mower, applied in the direction of cutter, harvester, application, etc., can solve the problems of removal, deterioration of the weight balance of the head body, insufficient holding force of the cutting rope, etc., to avoid the effect of reducing efficiency

Active Publication Date: 2013-10-30
STARTING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1): Since the diameter of the cord guide hole defined in the head main body and the diameter of the cord perforation formed in the pressure member are determined, it cannot be cooperatively fitted with cords having different thicknesses (diameters)
[0011] (2): Time and effort required increase because attaching the cord to or removing the cord from the head body requires moving the pressure member to align its cord perforation with the cord guide hole
[0012] (3): Since a U-shaped pressure member is combined at one side of the head body, the weight balance of the head body deteriorates, and vibration may be caused
[0013] (4): Since the cutting cord is held at the cord perforation of the pressure member, the holding force of the cutting cord may be insufficient, and the cutting cord may be moved or even removed from the head body due to the centrifugal force during the mowing operation

Method used

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  • Rotary cutter for brush cutter
  • Rotary cutter for brush cutter
  • Rotary cutter for brush cutter

Examples

Experimental program
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Effect test

no. 1 example

[0035] First, refer to figure 1 to FIG. 4 describe a rotary cutter for a lawnmower according to a first embodiment (pressure member pushing type). In the rotary cutter of the first embodiment, attachment and removal of the cutting cord 3 are performed while pushing the pressure member. In this rotary cutter, a head main body 1 is composed of a housing 1-1 and a cover 1-2, and a pressure member 2 is interposed between the housing 1-1 and the cover 1-2. The pressure member 2 has a bottom cylindrical body, a flat sheet-shaped clamping portion 2-1 formed at the center of the bottom portion of the body, and a string insertion guide hole 2-2 formed at an open side of the body. The size of the cord insertion guide hole 2-2 is larger than the thickness (diameter) of the cutting cord 3, and extends parallel to the flat plate-shaped clamping portion 2-1 in the radial direction. The rope support pipe 2-3 is fitted inside the guide hole 2-2. For example, the rope support tubes 2-3 may ...

no. 2 example

[0047] Next, refer to Figure 5 to Figure 7 A rotary cutter for a lawn mower according to a second embodiment (pressure member pulling type) will be described. In the rotary cutter of the second embodiment, attachment and removal of the cutting cord 13 is performed while pulling the pressure member. In the rotary cutter, a head main body 11 is composed of a housing 11-1 and a cover 11-2, and a pressure member 12 is interposed between the housing 11-1 and the cover 11-2. The pressure member 12 comprises a bottomed and flanged cylindrical body. The main body of the pressure member 12 is longer than that of the pressure member 2 of the first embodiment. The pressure member 12 also includes a flat sheet-shaped clamping portion 12-1 formed at the center of the bottom portion of the main body and a cord insertion guide hole 12-2 formed close to an upper portion of the clamping portion 12-1. The size of the cord insertion guide hole 12 - 2 is larger than the thickness (diameter) o...

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PUM

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Abstract

One embodiment of the invention provides a rotary cutter for a brush cutter, including: a head main body (1) having a cord guide hole (2-1); and a pressure member (2) having a cord inserting guide hole (2-1) formed to radially penetrate through the pressure member (2). The pressure member (2) is operable between: a first state in which the cord inserting guide hole (2-2) of the pressure member (2) is aligned with the cord guide hole (2-2) of the head main (1) body so that a cutting cord (3) is insertable into the head main body (1); and a second state in which the pressure member (2) is pushed inwardly of the head main body (1) from the first state; a third state in which the pressure member (2) is rotated with respect to the head main body (1) from the second state so that the inserted cutting cord (3) is made into a bent state.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2012-100381 filed on Apr. 25, 2012, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a rotary cutter for a lawnmower that cuts grass etc. by rotating a head from which a cutting cord protrudes radially, and more particularly Attachment type (non-reel-winding type) rotary cutters in which a reel for winding the cutting rope is not provided but the cutting rope is directly attached to the head, and replace the cutting rope when it becomes shorter due to wear. Background technique [0004] In general, a lawnmower includes a motor, a rotary shaft connected to the motor, and a head connected to the rotary shaft, and a cutting cord (mainly made of nylon) protrudes radially from the head. Therefore, such a lawn mower is capable of performing a mowing operation for cutting grass or...

Claims

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Application Information

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IPC IPC(8): A01D34/416
CPCA01D34/4166A01D34/416Y10T83/9292A01D34/90
Inventor 加藤宏树
Owner STARTING IND CO LTD
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