Garage Door Bracket Assembly Slidable Roller Housing
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Solution Overview
Problem
Conventional bottom brackets for garage doors face issues with securing roller housings, leading to potential disconnection under high tension, safety hazards, and cumbersome replacement processes, especially when dealing with varying roller diameters and secure fastening methods.
Innovation Solution
A bracket assembly with a moveable roller housing and fixed member, featuring L-shaped flanges and longitudinally extending bores to accommodate different roller sizes, along with a secure fastening mechanism that allows easy removal and replacement of guide members without disengaging the entire bracket from the door panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a U-shaped roller housing is fastened to the bottom bracket with screws or rivets, then the roller housing is securely attached, but the entire bottom bracket must be removed to replace the guide member, creating safety hazards and time consumption
Solution Approach 1:
The bracket assembly is divided into three main segments: the bottom bracket (fixed member), the roller housing (moveable member), and the guide member. This segmentation allows the roller housing to be independently removed from the bottom bracket by detaching the moveable member from the fixed member, enabling guide member replacement without removing the entire bottom bracket assembly, thus resolving the contradiction between secure attachment and ease of repair
Solution Approach 2:
The roller housing is designed as a moveable member that can dynamically detach and reattach to the fixed member. The moveable member includes fastening features that allow it to be securely attached during operation but easily detached when maintenance is needed, transitioning between fixed and movable states to resolve the contradiction between reliable attachment and ease of repair
2Ease of repair
If the roller housing is made moveable and selectively removable, then guide member replacement is simplified, but the attachment security under high cable tension may be compromised
Solution Approach 1:
The moveable member is pre-equipped with fastening features (such as tabs, slots, or quick-release mechanisms) that are designed to securely engage with the fixed member before operation begins. This preliminary preparation ensures that when the moveable member is attached, it provides secure fastening capable of withstanding high cable tensions, while still allowing for easy detachment when needed for maintenance
Solution Approach 2:
The fastening and unfastening mechanism is extracted as a separate functional system between the moveable member and fixed member. This extracted fastening system is specifically designed to provide secure attachment under load while enabling easy removal when maintenance is required, resolving the contradiction between attachment security and ease of repair
3Ease of manufacture
If flange holes are made slightly larger than the roller shaft, then assembly is easier, but the roller shaft can slip out causing the roller to bind
Solution Approach 1:
A retaining feature (such as a retainer, clip, or interference fit mechanism) is introduced as an intermediary element between the roller shaft and the flange holes. This intermediary component allows the flange holes to remain slightly larger than the roller shaft for easy assembly, while the retaining feature prevents the roller shaft from slipping out and causing the roller to bind, thus resolving the contradiction between ease of manufacture and operational reliability
Data Source
AI summary
The disclosure relates to a garage door assembly. The garage door assembly includes a plurality of interconnected garage door panels, a track and a cable. A bracket assembly is attached to one of the panels. The bracket assembly includes a moveable member including a roller which is rotatably received in the track. A fixed member is attached to a panel and includes a portion to which the cable is attached. The moveable member selectively accommodates the fixed member.