Air Register Eccentric Cam Mechanism for Damper Tilt Alignment
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Solution Overview
Problem
Existing air blow outlet registers with joint mechanisms experience rotational misalignment issues when the intersecting angles between control knobs and transmission shafts are large, leading to inadequate or excessive tilting of the damper, causing interference and failure to close or open the air passage effectively.
Innovation Solution
A register design featuring a damper drive mechanism with a boss member, case member, and cam member, where the camshaft is offset from the boss pivot axis, allowing the cam member to rotate eccentrically and adjust the tilting motion of the damper, using joint mechanisms for coupling between the transmission shaft and control knob, and between the transmission shaft and boss member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If joint mechanisms are used to couple the transmission shaft with the control knob and boss member, then the register can accommodate large intersecting angles between axes, but rotational misalignment occurs causing excessive or insufficient tilting of the damper
Solution Approach 1:
The patent introduces a rotation conversion mechanism as an intermediary component between the transmission shaft and the boss member. This mechanism converts the rotational movement from the transmission shaft into precise tilting motion of the boss member, eliminating direct rotational coupling and thus preventing rotational misalignment while maintaining the ability to accommodate large intersecting angles through the joint mechanisms
2Adaptability or versatility
If the intersecting angle between the transmission shaft and boss member is large, then the register can handle complex spatial arrangements, but rotational misalignment causes the damper to fail to close or open the air passage effectively
Solution Approach 1:
The rotation conversion mechanism serves as a mediator that decouples the spatial flexibility provided by joint mechanisms from the precision required for damper operation. It translates rotational input into controlled tilting motion, ensuring reliable damper closing and opening regardless of the intersecting angle between the transmission shaft and boss member
Solution Approach 2:
The patent employs a dynamic rotation conversion mechanism that adapts its motion transformation based on the rotational position of the transmission shaft. This dynamic conversion ensures that the boss member achieves the correct tilting angle for reliable damper operation across the full range of intersecting angles
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design eliminates excessive or insufficient tilting of the damper, ensuring accurate control of the air passage opening and closing, reducing interference and improving operational reliability.
Implementation Method 1
the case member holds the camshaft at a position offset from a straight line that is along an axial direction of the boss pivot in a direction perpendicular to the axial direction of the boss pivot to rotate the cam member about the camshaft that is eccentric
Data Source
AI summary
In a register 10, coupling between a transmission shaft 65 and a dial control knob 21 and coupling between the transmission shaft 65 and a boss member 73 are each made with a universal joint. Rotation of the dial control knob 21 is transmitted to a damper 19 via the transmission shaft 65, the boss member 73, and a cam member 75. A case member 74 rotatably holds the boss member 73 and the cam member 75. A boss pivot 74F of the boss member 73 is offset from a camshaft 75B of the cam member 75 in a direction perpendicular to the axial direction of the boss pivot 74F. Accordingly, the cam member 75 rotates about a rotation center eccentric from the boss member 73 as the boss member 73 rotates to open and close the damper 19.