Modular Actuator Case for Drip-Proof Injection Apparatus Repair
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Solution Overview
Problem
Conventional injection apparatuses require disassembly of the cover to repair or replace the actuator, disrupting the drip-proof state and necessitating on-site replacement, which is time-consuming and often requires factory-level intervention.
Innovation Solution
The injection apparatus features a modular actuator with a case housing the feed screw nut, feed screw shaft, motor, and transmission mechanism, allowing for easy replacement and maintenance while maintaining the drip-proof state, and a manufacturing method that includes a block-based case assembly for efficient construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuator is integrated into the cover frame, then the drip-proof state is maintained, but the ease of repair deteriorates
Solution Approach 1:
The actuator is segmented from the cover frame into a separate replaceable module. The actuator case with its internal components (motor, transmission mechanism, feed screw shaft, feed screw nut) functions as an independent unit that can be removed and replaced without disassembling the cover, thus maintaining the drip-proof state while enabling easy repair.
2Ease of repair
If the cover is disassembled for actuator repair, then the ease of repair is improved, but the drip-proof state is lost
Solution Approach 1:
The actuator is extracted as a separate functional module from the cover assembly. By taking out the actuator case as an independent unit with its own housing, it can be replaced without touching the cover, thereby preserving the drip-proof sealing of the cover while achieving easy repairability.
3Stability of the object's composition
If the actuator components are fixed in the frame, then the structural stability is improved, but the productivity deteriorates
Solution Approach 1:
The actuator is divided into a modular case structure containing all necessary components (motor, transmission mechanism, feed screw shaft, feed screw nut). This segmentation allows the entire actuator assembly to be pre-tested and certified as a stable unit, which can then be quickly replaced without affecting the overall structural stability of the injection apparatus.
Solution Approach 2:
The actuator module is pre-assembled and pre-tested as a complete functional unit before installation. This preliminary preparation ensures structural stability is already verified, and during operation, only the entire pre-tested module needs to be replaced, significantly improving productivity during maintenance.
Data Source
AI summary
The injection apparatus 100 is provided that can allow repair or replacement of an actuator 130 while maintaining a drip-proof state, and that can further maintain the drip-proof state without a cover. The injection apparatus 100 includes a syringe holder 110 on which a syringe filled with a liquid medicine is mounted, a presser 115 that pushes out the liquid medicine from the mounted syringe, an actuator 130 that moves the presser 115 forward or backward, the actuator 130 including a feed screw nut 134, a feed screw shaft 133, a motor 132, and a transmission mechanism 180 that transmits rotation from the motor 132 to the feed screw shaft 133, wherein the feed screw nut 134, the feed screw shaft 133, the motor 132, and the transmission mechanism 180 are housed in a case 170 of the actuator 130.