Cutter head of farmland ditcher

Abstract

The invention discloses a cutter head of a farmland ditcher. The cutter head comprises a rim, spokes, a shaft sleeve, cutter handles and the like, wherein a one-piece sealing cover is arranged on the outer side of the shaft sleeve at the center of the cutter head; a through hole is formed in the middle of the sealing cover. The invention also provides a manufacturing technical method for the shaft sleeve with the one-piece sealing cover at the center of the cutter head. According to the cutter head of the farmland ditcher, the shortcomings that the cutter head is easily installed in an inverted manner and an additional large gasket can easily lose during mounting of the cutter head in the prior art are overcome. The cutter head of the farmland ditcher is ingenious in structure; a forging manufacturing technology is easy, and relatively low in cost, and has a time-saving effect; furthermore, the surface of an inner hole of the forged shaft sleeve is high in intensity and has an anti-abrasion effect; the shaft sleeve with the one-piece sealing cover can be assembled and disassembled in a very convenient, quick and reliable manner.

Description

[0001] technical field [0002] The invention mainly relates to the technical field of farmland ditching machine cutter heads in agricultural machinery. Background technique [0003] The existing farmland ditching machine cutter head is composed of a wheel rim, spokes, bushing and knife handle, etc. The inner hole of the bushing in the center is divided into a cutter head assembly hole and a cutter head positioning hole from the inside to the outside. The hole is an inner cylindrical hole, and the positioning hole of the cutterhead is an inner prism hole, see Chinese invention patent CN2008101236158. The cutter head of the ditching machine is installed in cooperation with the cutter head shaft on the gear box of the ditching machine through the bushing. The outer end of the cutter head shaft is provided with threads. A large nut secures the cutterhead to the cutterhead shaft. [0004] The shaft sleeve structure of this ditching machine cutter head has the following disadva...

AI Technical Summary

Problems solved by technology

[0004] The shaft sleeve structure of this ditching machine cutter head has the following disadvantages in the actual use process: first, the farmland ditching machine is sold as bulk parts, and the user buys it back and assembles it by himself; the cutter head shaft adopting this structure Most users know that according to the structure of the cutterhead shaft and the cutterhead bushing, put the assembly hole of the cutterhead bushing on the cutterhead shaft first, and then match the positioning hole of the cutterhead with the prism of the cutterhead shaft. It is not easy to install the cutter head backwards, but it has not completely eliminated the phenomenon of reverse installation, because the users are basically farmers, and a small number of them are old and low-tech, and they will still use the cutter head carelessly. After the disc is installed reversely, the workload will increase greatly, and the groove shape will be very rough; second, because the hub of the cutter head needs to be welded with the spokes, the material of the hub must use a material with good welding performance. Materials with low carbon content, and this has brought the disadvantages of low surface hardness of the inner hole of the shaft sleeve and easy damage of the positioning prism hole for transmitting torque; third, the existing cutter head sleeve has complicated manufacturing process and high processing cost ; Fourth, the gasket provided on the side of the cutter head bushing close to the nut is also easy to lose during disassembly and assembly, which brings inconvenience to use

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