Rotary cutter for lawn mower and portable lawn mower using same

Abstract

The invention discloses a rotary cutter for a lawn mower and a portable lawn mower using the same, which belong to the field of garden tools and are used for cleaning weeds during the greening processof gardens. The rotary cutter at least comprises a cutting tool installing shaft which is provided with a cutting tool rotating about the central axis of the installing shaft; a guiding member material which rotates with respective to the cutting tool installing shaft through a central part A is installed under the cutting tool; the central part A is connected with an edge A of the guiding membermaterial through a rotating surface A; the rotating surface A is formed by a ridge A rotating about the central axis of the cutting tool installing shaft and the ridge A is positioned outside a member rotating about the cutting tool installing shaft outside the cutting tool. In view of the above technical solution, the present invention can provide a rotary cutter for a lawn mower that is safe, efficient, and easy to adjust and maintain, and a portable mower using the same.

Description

technical field [0001] The invention belongs to the field of garden tools, and in particular relates to a rotary cutter for a lawn mower and a portable lawn mower using the tool. Background technique [0002] Portable power lawn mowers are commonly used as a tool for removing weeds growing in the field. On this type of lawn mower, the rotational power generated by a small engine is transmitted to the rotary cutter equipped at the front end of the operation pipe, and the operator swings the operation pipe to perform the required weeding work. As a rotary cutter, a hard nylon rope is generally used to cut weeds under the action of high-speed rotation. [0003] Such as Figure 19 and 20 As shown, one end of the operation tube 101 of the lawn mower is equipped with an engine (not shown) as a power source, so that the drive cable 102 inserted in the operation tube 101 rotates, and the power is transmitted to the front end of the operation tube 101 . At the front end of the ope...

AI Technical Summary

Problems solved by technology

[0006] There are the following problems in the above-mentioned structure: one, the nylon rope does not necessarily rotate in the plane perpendicular to the central axis of the cutting tool installation shaft 103 during operation, and sometimes also contacts with the outer edge of the disc-shaped guide member 112, and the nylon rope In the case of high-speed rotation, contact and wear may be cut off

[0007] 2. The bolt 110 in the prior art protrudes from the disc-shaped guide part 112 and rotates. When the disc-shaped guide part 112 is grounded and remains stationary, the bolt 110 can still rub against the ground to cause sand and soil to scatter; and , the mounting member 111 protrudes relative to the disc-shaped guide member 112 and its outer diameter is smaller than that of the disc-shaped guide member 112. During the grounding process, the frictional force for keeping the disc-shaped guide member 112 almost at rest is insufficient

[0008] Three, the gap between the disk-shaped guide member 112 and the cutting tool holding member 107 in the prior art can invade weeds, sand and soil, etc., hindering the stillness of the disk-shaped guide member 112

[0010] 5. If the space above the disc-shaped guide member 112 and the nylon rope cutting tool 113 (on the side of the operation tube 101 ) is free of obstructions, when the operator swings the operation tube 101 for operation, the stalks of the weeds will not all run to the disc-shaped The outer side of the maximum outer diameter of the guide member 112 cannot be denied the possibility that there will be no nylon rope cutting cutter 113 in the inner position for mowing operations

In addition, when the operation tube 101 is swung, small stones and the like will be lifted above the disc-shaped guide member 112 and enter the inner side of the maximum outer diameter of the disc-shaped guide member 112, and the rotating motion of the nylon rope will cause the small stones and the like to scatter. The danger of the unobstructed space to the side of the operation pipe 101;

[0011] Six, even if the mowing position of the nylon rope cutting tool 113 is limited to the outer portion of the maximum diameter of the disc-shaped guide member 112, the reaction force of the cutting load value applied to the cutting position is held by the cutting tool 113 from the nylon rope cutting tool 113. The damage to the nylon cord occurs near the protruding opening of the member 107, which may impair durability.

If it comes into contact with the clothes and body of the operator during operation, there is a risk of injury to the operator and a threat to the personal safety of the operator.

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