Molded Case Circuit Breaker Assembly Device for Bus Bar Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in efficiently and cost-effectively assembling molded case circuit breakers to bus bars, particularly due to the difficulty in positioning and securing fixation screws with internal screw holes, which often results in screws falling off and requiring time-consuming reinstallation.
Innovation Solution
An assembly device with a screw head holding mechanism is integrated into the molded case circuit breaker's housing, allowing for secure engagement and temporary fixation of screws, preventing them from falling and simplifying the assembly process by aligning and holding screw heads within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If screw holes are moved to the inside of the MCCB for space saving, then compact connection devices can save space, but it becomes hard to locate and hold screws in position during assembly
Solution Approach 1:
A temporary holding device is introduced as an intermediary tool that fits into the cavity of the MCCB housing. This device provides recesses that temporarily hold screw heads during assembly, making it easy to position and secure screws when the screw holes are located inside the MCCB housing.
Solution Approach 2:
The holding device is prepared in advance and inserted into the MCCB cavity before screwing operations begin. The device pre-establishes the correct positioning for screw heads, allowing screws to be easily located and held in position before the actual fastening to the bus bar occurs.
2Reliability
If fixation screws are used for secure MCCB fixation to bus bar, then secure fixation is achieved, but screws may fall into the control cabinet and block subsequent assembly
Solution Approach 1:
The holding device acts as a mediator between the screw heads and the assembly environment. It temporarily secures screw heads during positioning and prevents them from falling into the control cabinet, while still allowing the screws to be properly fastened to the bus bar for secure fixation.
Solution Approach 2:
The holding device provides beforehand protection by creating a safe temporary repository for screw heads before the actual fastening operation. This prevents the harmful effect of screws falling into the control cabinet and blocking subsequent assembly operations.
3Ease of operation
If external screw holding devices such as forceps are used, then screws can be held, but it is hardly possible to hold multiple screws at correct positions simultaneously
Solution Approach 1:
Multiple holding recesses are combined into a single integrated holding device that fits within the MCCB cavity. This unified device can simultaneously hold multiple screw heads at their correct positions, eliminating the need for multiple separate external holding tools and simplifying the positioning process.
Data Source
AI summary
An assembly device is disclosed for fixing a molded case circuit breaker, including a housing with at least one screw hole for a fixation screw for fixing the molded case circuit breaker to a bus bar. The assembly device includes a screw head holding device for holding a screw head of the fixation screw, the assembly device being configured to be arranged inside a cavity of the housing of the molded case circuit breaker in such a way that a screw head of a fixation screw arranged at the screw hole for mounting the molded case circuit breaker to the bus bar is engageable with the screw head holding device in an engagement direction. Furthermore, a circuit breaker system is disclosed including a molded case circuit breaker and an assembly device. Moreover, a method is disclosed for mounting a molded case circuit breaker to a bus bar.