Automatic Threading Machine Rotor Spindle Integration
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Solution Overview
Problem
Existing automatic threading machines are complex, cumbersome, and noisy due to the presence of drive means between the motor and the tool holder spindle, which increases component count and production costs, and limits power transmission efficiency.
Innovation Solution
The tool holder spindle is directly supported by and integral with the rotor of an electric motor, eliminating the need for drive means by using a shape coupling to prevent relative rotation and allow translation, enabling direct power transmission without gears or belts, and incorporating a hollow rotor with a chamber for compactness and integrated pneumatic or hydraulic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If drive means (gears, belts, drive screws) are used to rotate the tool holder spindle, then the machine can transmit rotational motion from the motor to the tool, but the machine becomes complex, cumbersome, and noisy with increased component count and production costs
Solution Approach 1:
The patent merges the motor rotor and tool holder spindle into a single integrated component. The rotor is configured with a tool holder spindle that is directly supported by it, eliminating the need for separate drive means such as gears, belts, or drive screws. This integration directly reduces structural complexity while maintaining power transmission capability.
2Power
If drive means are used between the motor and tool holder spindle, then rotational motion can be transmitted, but the machine dimensions increase and production costs rise
Solution Approach 1:
By combining the rotor and tool holder spindle into one integrated component, the patent eliminates intermediate drive mechanisms that would occupy additional space. This merging directly reduces the overall machine dimensions while preserving the essential function of transmitting motion from the motor to the threading tool.
3Power
If drive means are used to transmit motion from motor to tool, then the tool can be rotated, but noise levels increase and power transmission efficiency decreases
Solution Approach 1:
The integration of the rotor and tool holder spindle into a single component eliminates multiple moving interfaces and mechanical connections that generate noise and energy losses. This direct integration reduces noise levels and improves power transmission efficiency by removing the inefficiencies associated with gears, belts, and other drive mechanisms.
4Device complexity
If the rotor and tool holder spindle are directly integrated, then the machine structure is simplified and production costs are reduced, but the tool holder spindle must be precisely coupled to prevent relative rotation while allowing translation
Solution Approach 1:
The patent achieves structural simplification by merging the rotor and tool holder spindle, while the manufacturing precision requirement is managed through the functional design of the integrated component where the rotor directly supports the spindle, eliminating the need for separate coupling mechanisms.
Data Source
Figure 1~3
Figure 4~6
AI summary
Described is an automatic threading machine comprising an electric motor (2) having a rotor (3) designed to selectively rotate in both directions about an axis (4) and a tool holder spindle (7) able to move with a rotating movement about the axis (4) and with a translating movement along the axis (4). The rotor (3) controls the rotating movement of the tool holder spindle (7) about the axis (4). The tool holder spindle (7) is supported by the rotor (3) and moves as one with it in the rotating movement about the axis (4). The rotor (3) has internally a chamber (5) along which the tool holder spindle (7) can translate along the axis (4) and which is suitable for at least partly housing the tool holder spindle (7) in at least one position adopted by the tool holder spindle. The electric motor (2) comprises stator windings (10) arranged radially outside the rotor (3) and the chamber (5). The stator windings (10), the rotor (3) and the chamber (5) extend along the axis (4) for at least one shared stretch.