Milling Head Shaft Fixing with Conical Washer Locking
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Solution Overview
Problem
Conventional milling heads face challenges in reducing the overall length along the axial direction due to gaps between the locking nut and the bearing unit, and the assembly of gear units requires time-consuming and labor-intensive processes to fit washers of specific dimensions.
Innovation Solution
A fixing device for the rotary shaft of a milling head incorporating a gear set, bearing sets, an outer washer with conical detent holes, an inner washer, and a locking unit with conical adjusting members, which allows for precise alignment and fixation, reducing unnecessary space and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a locking nut is used to fix the bearing unit, then the bearing unit can be secured, but a gap remains between the locking nut and bearing unit making reduction of overall axial length difficult
Solution Approach 1:
The patent removes the traditional locking nut component entirely and replaces it with a washer integrated into the bearing unit assembly. The washer directly contacts the bearing unit without creating gaps, eliminating the need for separate locking mechanisms while reducing the overall axial length.
Solution Approach 2:
The washer is integrated as part of the bearing unit assembly rather than being a separate component. This merging of functions allows the washer to both support and secure the bearing unit in a single compact structure, eliminating gaps and reducing axial length.
2Ease of manufacture
If a washer is used for assembly of gear units, then the gear units can be assembled, but assembly personnel need to measure and trim the washer which is time consuming and labor intensive
Solution Approach 1:
The washer is pre-designed with specific dimensional parameters that directly match the bearing unit and housing dimensions. This preliminary design eliminates the need for on-site measurement and trimming operations, allowing assembly personnel to simply install the pre-fitted washer without additional processing steps.
Solution Approach 2:
The washer dimensions are precisely controlled during manufacturing to match the required gap dimensions. By changing the manufacturing parameters to produce pre-fitted washers with exact dimensions, the need for post-manufacturing trimming operations is eliminated.
Data Source
AI summary
A fixing device for a rotary shaft of a milling head includes an outer washer, an inner washer, and a locking unit. The outer washer is mounted between a housing and a first shaft, and includes an outer peripheral surface, an inner peripheral surface, and detent holes. Each detent hole is defined by a conical surface that has a bottom side portion and a top side portion. The inner washer is mounted between the outer washer and the first shaft. The locking unit includes fastening holes and adjusting members corresponding in position to the detent holes. Each adjusting member has a threaded section engaging threadedly with a corresponding fastening hole, and a conical section connected to the threaded section. The conical section has a conical pressuring surface that presses against the bottom side portion.