Output gear edge trimming method of crane rotary speed reducer and output gear

Abstract

The invention relates to an output gear edge trimming method of a crane rotary speed reducer and an output gear, and belongs to the technical field of crane output gear shape trimming. The edge trimming method comprises the following steps that the single-side reduction amount of the addendum circle diameter of the output gear is determined, and the single-side reduction amount is 0.1-0.12 times of the modulus of the output gear; the diameter of the root circle of the output gear is reduced by 0.5 mm; and the tooth profile of the output gear is subjected to edge trimming, the edge trimming amount in the tooth thickness direction is 0.02-0.025 times of the modulus of the output gear, and the edge trimming amount in the tooth depth direction is 0.25-0.3 times of the modulus of the output gear. According to the output gear edge trimming method, the edge trimming process is simple, under the condition that cost is not increased, the torque and rotating speed requirements of the crane rotary speed reducer under severe working conditions can be met, the abnormal meshing phenomenon in the working process can be prevented, for example, fine needle scrap iron falls off during meshing, indentations and burrs appear on the portion, close to the tooth root, of the rotary supporting gear, and shaking occurs in the meshing transmission process; and the working stability and reliability are high, and the average fault-free working life of the rotary speed reducer is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of modifying the output gear of a crane, and in particular relates to a method for repairing the edge of an output gear of a slewing reducer of a crane and the output gear. Background technique [0002] In recent years, the slewing reducer used in the crane has been using the standard displacement gear, that is, the addendum circle diameter and the dedendum circle diameter of the output gear of the slewing reducer are calculated according to the modulus, the number of teeth, the pressure angle, and the displacement coefficient. Then, A standard gear hob is used for hobbing according to this design. Ideally, this design conforms to the principle of gear meshing, but in the actual production process, it is subject to various constraints such as center distance deviation, machining accuracy of the slewing support, size of the root fillet of the slewing support, and inconsistent force on the output gear of the s...

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Problems solved by technology

Ideally, this design conforms to the principle of gear meshing, but in the actual production process, it is subject to various constraints such as center distance deviation, machining accuracy of the slewing support, size of the root fillet of the slewing support, and inconsistent force on the output gear of the slewing reducer. Affected by factors, there is an abnormal meshing phenomenon between the output gear of the slewing reducer and the slewing support. This phenomenon often occurs when the slewing support and slewing reducer are assembled on the main machine for debugging or after a period of use to reduce the meshing gap adjustment. When eccentric, at this time, it is not easy to detect the center distance and the accuracy of the large and small gears. It is necessary to disassemble the assembly parts and re-test to find out the reasons that affect the gear meshing.

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