Spiral cutter shaft assembly

Abstract

The invention relates to a spiral cutter shaft assembly. The spiral cutter shaft assembly comprises a cutter shaft welded part, mowing cutters and bearing installation seats arranged at two ends of the cutter shaft welded part, wherein each bearing installation seat comprises a clamping ring, a bearing and a bearing seat; the cutter shaft welded part comprises a cutter shaft pipe and cutter holders, the cutter holders are fixedly connected with the cutter shaft pipe and the mowing cutters are movably connected with the cutter holders; edges of adjacent mowing cutters are overlapped, and the cutter holders are sequentially, longitudinally and spirally arranged along an outer circumferential surface of the cutter shaft pipe at two ends in two directions in a 10, 12 or 14-equal partition manner; spiral lines are formed by two lines of cutter holders in the same quantity, the screw pitch of the two spiral lines is equal and is 206mm, and initial positions on end surfaces are different by 90 degrees. Since a spiral arrangement manner is adopted for the cutter holders of the spiral cutter shaft assembly, the quantity of mowing cutters is reduced; the since cutter holders are arranged according to a certain spiral sequence, only two or three cutters perform cutting at the same moment, the working resistance during mowing is greatly reduced, the load during operation is more uniform, the stability in the dynamic balance process is better and the working efficiency is increased.

Description

technical field [0001] The invention relates to the field of mechanical equipment for mowing, in particular to a spiral cutter shaft assembly. Background technique [0002] The tractor-powered lawn mower works through the power of the tractor to drive the knife shaft. When the lawn mower is moving forward, the knife shaft rotates at high speed for cutting action, realizing the eradication of vegetation in a large area. The key functional part of the lawn mower is the mower shaft with the mowing knife, and the arrangement of the knife seat on the knife shaft directly affects the working effect of the machine. [0003] Chinese patent CN 201911036 U discloses a cutter shaft assembly, including a cutter shaft weldment, and several small hoe assemblies arranged on the cutter shaft weldment, the cutter shaft weldment includes a cutter shaft body, and is arranged on The bearing mounting parts at both ends of the cutter shaft body, the bearing mounting parts include a bearing seat,...

AI Technical Summary

Problems solved by technology

[0004] Although the cutter shaft assembly described in the above-mentioned patent can realize the eradication of vegetation, the cutter holders are arranged in a straight row, and the cutter holders are arranged longitudinally in 4 equal divisions, which increases the number of mowing knives. During the working process of the lawn mower, at the same time There are 5 or more knives for cutting work, the working resistance of the lawn mower becomes larger, and a tractor with greater power is required to drive it, which increases the manufacturing cost and working cost

[0005] In the prior art, most of the knife seats are arranged in straight rows, which is not stable during the dynamic balancing process, and the machine often vibrates greatly, which shortens the life of the lawn mower

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