Spindle Device Wiring for Quick Replacement and Noise Isolation
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Solution Overview
Problem
In portal machining centers, the existing spindle device design requires significant downtime for maintenance due to the need to disconnect power and signal lines via relay connectors, which increases downtime and reduces productivity, and is prone to noise interference affecting signal line accuracy.
Innovation Solution
A spindle device with a bracket that allows wiring to be extended and connected via a joint component within the bracket, enabling quick detachment and reconnection without disassembling the bracket from the support arm, and separate wiring paths for power and signal lines to prevent noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay connectors are provided at the connection between the attachment and the rotary index shaft to connect power lines and signal lines, then the motor can be driven and sensors can function, but the attachment and rotary index shaft must be disassembled to disconnect wiring during maintenance, increasing downtime
Solution Approach 1:
A flexible cable is introduced as an intermediary element between the attachment and the rotary index shaft. This cable can be easily disconnected and reconnected without disassembling the attachment or rotary index shaft, thereby maintaining reliable electrical connections while significantly reducing maintenance downtime. The cable acts as a mediator that decouples the mechanical assembly from the electrical connection requirements.
2Device complexity
If power lines and signal lines are wired together in the same path, then wiring complexity is reduced, but the signal line becomes influenced by noise from the power line
Solution Approach 1:
The wiring path is segmented into separate channels within the bracket structure. Power lines and signal lines are routed through distinct pathways that are physically separated, preventing electromagnetic interference from the power lines from affecting the signal lines. This segmentation maintains wiring organization while ensuring signal integrity through spatial isolation.
3Ease of repair
If the spindle is detached from the attachment for maintenance, then the spindle can be replaced, but the attachment and rotary index shaft must be disassembled to disconnect wiring, increasing maintenance time
Solution Approach 1:
The flexible cable serves as a mediator that allows the spindle to be detached and replaced without disassembling the attachment or rotary index shaft. The cable can be quickly disconnected from terminals on the attachment side, enabling rapid spindle replacement while maintaining the integrity of the attachment assembly.
Solution Approach 2:
The wiring system is made dynamic and flexible rather than rigid. The flexible cable can accommodate the movement and detachment of the spindle, allowing maintenance operations to proceed without requiring the entire assembly to be disassembled. This dynamic wiring solution enables easy spindle replacement while minimizing maintenance time.
Data Source
AI summary
To provide a spindle device and a machining center, in which spindle replacement can be carried out in an extremely short time, downtime during maintenance is short, and productivity is high. In a spindle device 20, there are provided wirings 41, 42 extended from a spindle 30 and wired to support arms via a bracket 21, and joint components 74, each provided at a position a predetermined length extended from extended parts for the wirings 41, 42, are accommodated within the bracket 21.