Electrospindle Double-Threaded Shaft for Reversible Tool Rotation
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Solution Overview
Problem
Existing electrospindles require different motor shafts and tools for each rotation direction combination, necessitating frequent replacements and limiting the ability to reverse motor rotation direction without shaft changes, which increases production costs and downtime.
Innovation Solution
An electrospindle design featuring a mechanical transmission with a double-threaded free end and interchangeable nuts that allow for reversible motor rotation without replacing the motor shaft or transmission, enabling use with both right-handed and left-handed tools and tools with different rotation directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different motor shafts are used for each rotation direction combination, then the electrospindle can accommodate different rotation directions, but the device complexity and number of components increase
Solution Approach 1:
The motor shaft is designed with a universal double-threaded configuration containing both right-handed and left-handed threads, allowing a single shaft to accommodate tools with different rotation directions. This eliminates the need for multiple specialized shafts while maintaining full compatibility with various tool types.
Solution Approach 2:
The patent combines both right-handed and left-handed threads into a single motor shaft structure. By merging these previously separate functions into one unified component, the system reduces the number of parts while preserving the ability to accommodate different rotation directions.
2Reliability
If motor shaft replacement is required to reverse rotation direction, then the correct thread configuration is ensured, but production downtime and operational inefficiency increase
Solution Approach 1:
The system transitions from a static configuration requiring shaft replacement to a dynamic configuration where the motor rotation direction can be reversed on-the-fly. The double-threaded shaft enables real-time adaptation to different rotation requirements without mechanical replacement, allowing continuous operation and instant direction changes during machining.
3Adaptability or versatility
If multiple motor shafts are maintained for different rotation combinations, then all rotation directions are supported, but inventory costs and production expenses increase
Solution Approach 1:
A single motor shaft design serves multiple functions by incorporating both right-handed and left-handed threads, eliminating the need to maintain separate shafts for different rotation combinations. This universal design reduces inventory requirements while preserving full adaptability to various tool configurations.
Data Source
Figure 1~2
AI summary
An electrospindle comprising a motor (2) for moving a tool and a mechanical transmission (3) for transmitting motion from the motor (2) to the tool, the electrospindle (1) comprising a gripping head (5) for the tool and for coupling the latter to the mechanical transmission (3), the head (5) in turn comprising two flanges (6) between which a portion of the tool can be interposed, a first flange (8) being pushed against a counterflange (9) by a thrust nut (7) so as to hold the tool in position. The transmission (3) has a free end (10) threaded so as to receive the thrust nut (7) by screwing, the thread (11) of the free end (10) being double and comprising a first right-handed thread and a second left-handed thread.