Blower Bracket Rail and Claw Assembly for Mounting
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Solution Overview
Problem
The existing blower device structure faces challenges in securing attachment strength and assembling accuracy due to the placement of the locking claw and narrow intervals between projections, leading to potential deflection and reduced assembling strength.
Innovation Solution
The blower device incorporates a pair of rail parts extending along the rotation axis with an engagement rib connecting them, and a claw part that is slidable and engageable with the rib, allowing for adjustable claw size and improved assembling accuracy and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locking claw is disposed at the leading end of the bracket to enable selective attachment, then the ease of operation is improved, but the strength against radial load deteriorates
Solution Approach 1:
The bracket is divided into multiple functional segments: the locking claw for attachment, the reinforcement portion for strength, and the mounting leg for positioning. This segmentation allows each part to be optimized independently - the claw remains at the leading end for easy attachment while the reinforcement portion provides the necessary radial load strength.
Solution Approach 2:
The reinforcement portion is pre-formed as an integral part of the bracket structure, creating a strengthened region before the bracket is installed. This preliminary structural preparation ensures that the bracket can withstand radial loads during operation while maintaining its attachment functionality.
2Manufacturing precision
If the interval between projections is widened to improve assembling accuracy, then the manufacturing precision is improved, but the bridge part deflection increases
Solution Approach 1:
The reinforcement portion is pre-formed as an integral structural element of the bracket, creating a strengthened region before installation. This preliminary structural preparation allows the bridge part to be made wider for improved assembling accuracy while the reinforcement portion prevents deflection during operation.
Solution Approach 2:
The reinforcement portion creates a localized strengthened region within the bracket structure. This allows the bridge part to have increased width for better assembling accuracy in specific areas, while the reinforcement portion provides the necessary rigidity to prevent deflection under load.
3Adaptability or versatility
If the claw is formed to be small to fit narrow interval between projections, then the adaptability is improved, but the assembling strength deteriorates
Solution Approach 1:
The bracket is segmented into the locking claw for attachment and the reinforcement portion for strength. This allows the claw to remain small for adaptability to various mounting positions while the reinforcement portion provides the necessary assembling strength.
Solution Approach 2:
The reinforcement portion is merged as an integral part of the bracket structure rather than a separate component. This combination ensures that the bracket maintains adaptability for various mounting positions while the integrated reinforcement provides the necessary strength without compromising the claw's ability to fit narrow intervals.
Data Source
AI summary
A blower case configured to accommodate an impeller and a bracket attached to an outer periphery of the blower case and configured to fix the blower device at a mounting target are included. At an outer peripheral surface of the blower case, a pair of rail parts extending in a direction of a rotation axis of the impeller and an engagement rib connecting the rail parts to each other at an intermediate portion in a longitudinal direction of the rail parts are provided. At the bracket, a pair of grooves fitted with the pair of rail parts and slidable in the direction of the rotation axis and a claw part disposed between the pair of grooves so as to be engaged with the engagement rib in the direction of the rotation axis are provided. A plurality of pairs of rail parts are provided along the outer periphery of the blower case, and the bracket can be selectively attached to the pair of rail parts.