Integrated Commutator and Speed Regulator for Electric Tools
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Solution Overview
Problem
The high cost of electric tools is attributed to the separate production and purchasing of speed regulation switches and commutators, which are typically manufactured by specialized companies.
Innovation Solution
An electronic device with a main body, variable resistor, speed regulating contact, reversing electric connecting part, and handles that integrate speed regulation and commutation functions, using a melt adhesive curing mode for connections and sealing rings to prevent contamination and ensure reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a speed regulation switch and a commutator are separately produced and purchased from specialized manufacturers, then the electric tool achieves reliable speed regulation and commutation functions, but the parts purchasing cost and overall device cost increase significantly
Solution Approach 1:
The patent combines the speed regulation switch and commutator into a single integrated structure where the commutator serves dual functions: commutation and speed regulation. The speed regulation switch is formed by arranging commutator segments and carbon blocks in specific patterns on the same insulating base, eliminating the need for separate components and reducing overall device complexity while maintaining reliability
Solution Approach 2:
The commutator is designed to perform multiple functions simultaneously: it provides commutation for motor operation and incorporates speed regulation capability through selectively arranged carbon blocks that contact specific segments. This multi-functional design eliminates the need for separate speed regulation switches, reducing part count and purchasing costs while maintaining functional reliability
2Reliability
If a speed regulation switch and a commutator are separately produced and purchased from specialized manufacturers, then the electric tool achieves reliable speed regulation and commutation functions, but the parts purchasing cost increases
Solution Approach 1:
The patent combines the speed regulation switch and commutator into a single integrated structure where the commutator serves dual functions: commutation and speed regulation. The speed regulation switch is formed by arranging commutator segments and carbon blocks in specific patterns on the same insulating base, eliminating the need for separate components and reducing overall device complexity while maintaining reliability
Solution Approach 2:
The commutator is designed to perform multiple functions simultaneously: it provides commutation for motor operation and incorporates speed regulation capability through selectively arranged carbon blocks that contact specific segments. This multi-functional design eliminates the need for separate speed regulation switches, reducing part count and purchasing costs while maintaining functional reliability
Data Source
AI summary
The invention provides an electronic device, a PCB and an electric tool; comprises a main body, a first electric connecting part, a variable resistor, a speed regulating contact, a reversing electric connecting part, a reversing contact, a speed regulating handle and a reversing handle, the first electric connecting part is fixedly connected with the main body, and one end of the first electric connecting part is exposed out of the main body; one end of the speed regulating handle is of a cylindrical structure, the end part of the speed regulating handle is provided with an opening, one end of the main body is provided with a column, the opening end of the speed regulating handle is movably sleeved on the column through an elastic piece and forms a first space with the main body; the speed regulating contact and the variable resistor are arranged in the first space.