Heating Roller Power Feeder with Nested Rolling Contacts
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Solution Overview
Problem
Existing heating devices face challenges in stably feeding power to a rotating resistance heating layer without increasing the device size, particularly when using a power feed member that contacts the heating roller at a predetermined position or when bearings are disposed at end portions closer to the outside than the connection power feeder.
Innovation Solution
A heating device design featuring a connection power feeder with an annular frame concentric with the heating roller, a power feed shaft, and rolling bodies in conductive contact with the frame and shaft, where the bearing is mounted closer to the inside than the connection power feeder, allowing for stable power feeding without increasing the device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a power feed member contacts the heating roller at a predetermined position to feed power to the resistance heating layer, then power can be supplied to the heating roller, but the device size increases and mechanical strength decreases
Solution Approach 1:
The connection power feeder is nested within the bearing structure, with the annular frame positioned inside the bearing's internal space. The power feed shaft passes through the center of the annular frame, creating a compact nested arrangement that eliminates the need for separate power feeding components, thereby reducing device size while maintaining power supply functionality
Solution Approach 2:
The bearing structure serves dual functions: supporting the heating roller for rotation and housing the connection power feeder for electrical connection. This multi-functional design integrates mechanical support and electrical power feeding into a single component system, reducing overall device size and improving mechanical strength
2Use of energy by moving object
If a power feed member contacts the heating roller at a predetermined position to feed power, then power can be supplied to the resistance heating layer, but the temperature distribution becomes non-uniform
Solution Approach 1:
The connection power feeder segments the power feed path into multiple contact points through the rolling bodies that rotate with the heating roller. This segmentation distributes the electrical connection along the rotation path, ensuring uniform power supply and temperature distribution across the entire heating surface rather than concentrating it at a single predetermined position
Solution Approach 2:
The connection power feeder transitions from a static contact mechanism to a dynamic one where rolling bodies rotate with the heating roller. This dynamic rotation ensures continuous and uniform electrical contact throughout the heating roller's rotation, maintaining consistent temperature distribution across the heating surface
3Speed
If the bearing is disposed at the end portion closer to the outside than the connection power feeder, then the heating roller can be supported, but the mechanical strength decreases and damage risk increases
Solution Approach 1:
The bearing position is inverted from the conventional arrangement (outside the connection power feeder) to inside the connection power feeder's annular frame. This inverted positioning places the bearing closer to the center of the heating roller, maximizing the distance between the bearing and the outer peripheral surface, thereby reducing bending moments and improving mechanical strength while still supporting rotation
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 enables stable power feeding to the resistance heating layer without enlarging the device, improving mechanical strength and temperature distribution while preventing damage to the heating roller and power feed layer.
Implementation Method 1
a plurality of rolling bodies that roll while being in conductive contact with an inner peripheral surface of the frame and an outer peripheral surface of the power feed shaft
Implementation Method 2
a heating roller that includes a resistance heating layer
Data Source
AI summary
A heating device includes a heating roller that includes a resistance heating layer, a bearing that supports the heating roller to allow the heating roller to be rotatable, and a connection power feeder that is mounted on an end portion of the heating roller, is connected to the resistance heating layer, and feeds power to the resistance heating layer, in which the connection power feeder includes an annular frame that is disposed to be concentric with the heating roller and is conductively connected to the resistance heating layer, a power feed shaft of which a portion is disposed in the frame and which feeds power, and plural rolling bodies that roll while being in conductive contact with an inner peripheral surface of the frame and an outer peripheral surface of the power feed shaft, and the bearing is mounted on a portion of the end portion of the heating roller that is closer to an inside than the connection power feeder in an axial direction.