Laundry treatment apparatus
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Solution Overview
Problem
Conventional dryers have complex assembly structures that expose components to damage from laundry, leading to rust and reduced coupling strength, with potential for slippage and reduced efficiency in rotational force transmission.
Innovation Solution
A laundry treatment apparatus using a hot-rolled galvanized sheet iron shaft bracket and a nut-shaped coupling member with a screw-locking agent to enhance clamping force, prevent slippage, and improve assembly ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional screw-type coupling structure is used to connect the shaft bracket and rotating shaft, then the assembly structure is established, but the clamping force is insufficient and the assembly complexity increases
Solution Approach 1:
The patent changes the coupling mechanism from a screw-type connection to a friction-based press fit connection. The shaft bracket is pressed onto the rotating shaft with sufficient clamping force to prevent slippage, eliminating the need for screws and screw holes. This parameter change in the coupling mechanism resolves the contradiction by providing adequate clamping force while simplifying the assembly structure.
2Reliability
If a complex assembly structure with multiple coupling members is used, then the connection is established, but the ease of assembly operation deteriorates
Solution Approach 1:
The patent extracts and eliminates the screw-type coupling members from the assembly structure. Instead of using multiple coupling components, the design relies on a simple press fit connection where the shaft bracket is directly pressed onto the rotating shaft. This extraction of unnecessary coupling members improves ease of assembly operation while maintaining connection reliability through proper clamping force.
3Power
If protruding coupling members and complex bottom surface structures are used, then the rotational force transmission is established, but damage to laundry increases
Solution Approach 1:
The patent converts the potential harm of protruding coupling members into a benefit by eliminating them entirely. The smooth bottom surface design without protruding studs or complex coupling structures prevents damage to laundry while still achieving effective rotational force transmission through the friction-based press fit connection between the shaft bracket and rotating shaft.
4Strength
If conventional coupling members with screw holes are used, then the connection is established, but the fastening force is lowered and assembly alignment becomes difficult
Solution Approach 1:
The patent substitutes the mechanical screw-type fastening system with a friction-based press fit system. The shaft bracket is pressed onto the rotating shaft with sufficient force to create friction that prevents slippage and provides the necessary fastening strength. This substitution eliminates the need for screw hole alignment and improves both fastening force and assembly ease.
Data Source
AI summary
A laundry treatment apparatus includes: a drive unit including a rotating shaft, a drum configured to be rotated by the rotating shaft and receive laundry and including a cylindrical drum body and a rear cover, the rear cover defining a rear surface of the drum body and a rear cover through hole in an axial direction of the rotating shaft, and a shaft bracket that (i) is coupled to the rear cover and the rotating shaft, (ii) covers the rear cover through hole, (iii) is configured to transmit rotational force of the rotating shaft to the drum, and (iv) defines a shaft-coupling hole in the axial direction. The rotating shaft is inserted into the shaft-coupling hole, projected into an inside of the drum, and coupled to the shaft bracket by a rotating-shaft-fastening member.