Small Machine Tool Hollow Housing Spindle Stabilization
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Solution Overview
Problem
Conventional hand-held machine tools are constrained by front and rear end plates, making it difficult to shrink their size and increase power output without increasing volume, which contradicts the trend of slim and light technology.
Innovation Solution
A small machine tool design featuring a hollow housing with a holder and driving unit, where the spindle is coupled with a rotor and ancillary support members, allowing for reduced size and increased power output without additional space, using a stator and rotor with ancillary rotary members to stabilize the spindle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hand-held machine tools use front and rear end plates to hold the spindle, then the structure is stable and reliable, but the size and volume of the machine tool increases
Solution Approach 1:
The patent merges the front end plate, rear end plate, and spindle support functions into a single integrated holder structure. The holder includes a hollow shaft portion with ancillary support members and ancillary rotary members that collectively support the spindle, eliminating the need for separate front and rear end plates while maintaining support stability.
Solution Approach 2:
The spindle is nested within the hollow shaft portion of the holder, and the ancillary support members and ancillary rotary members are nested within the hollow shaft portion. This nested arrangement allows multiple support functions to be compactly integrated, reducing the overall volume while maintaining reliability.
2Power
If larger ball bearings are installed on the front and rear end plates to increase power output, then the power output increases, but the size of the machine tool also increases
Solution Approach 1:
The patent combines multiple bearing functions into the ancillary support members and ancillary rotary members within the hollow shaft portion. This integration allows the machine tool to achieve higher power output through coordinated support mechanisms rather than relying on单个 oversized bearings, thus avoiding volume increase.
3Volume of moving object
If the machine tool is made smaller to follow the slim and light trend, then the portability and ease of operation improve, but the space to accommodate end plates and large bearings is reduced
Solution Approach 1:
The nested arrangement of the spindle within the hollow shaft portion and the ancillary support members within the hollow shaft portion allows the machine tool to be compact while maintaining adequate space for power transmission components. This nested structure enables small size without sacrificing power output capability.
Solution Approach 2:
The patent utilizes the hollow cylindrical space of the shaft portion to arrange support members and rotary members in a radial and axial configuration, effectively using three-dimensional space efficiently. This dimensional arrangement allows compact design while maintaining power transmission capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for a significant reduction in size and volume while maintaining precise operation and power output, even with unstable power supply, by using ancillary rotary members to stabilize the spindle and eliminate the need for larger end plates.
Implementation Method 1
a stator coupled on the hollow shaft portion to receive electricity to generate a magnetic force
Data Source
AI summary
A small machine tool includes a hollow housing, a holder located in the hollow housing and a driving unit coupled with the holder. The hollow housing has a holding portion and an aperture run through by a tool head. The holder has a coupling portion connected to the holding portion and a hollow shaft portion coaxial with the aperture. The hollow shaft portion includes an ancillary support member and at least one ancillary rotary member. The driving unit includes a stator coupled on the hollow shaft portion, a rotor located outside the stator and a spindle having two ends respectively coupling with the rotor and tool head and running through the hollow shaft portion, ancillary support member and ancillary rotary member. The spindle is driven by the rotor to drive the tool head to rotate.