Torque Receiving Assembly Axial Retention Mechanism
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Solution Overview
Problem
The ball-type universal joint in torque receiving assemblies for laser printers is prone to detachment, leading to instability during rotational force transmission.
Innovation Solution
A torque receiving assembly with a driven shaft and a distance-limiting mechanism, including a retaining cover and an urging spring, that allows reciprocal movement in the axial direction, ensuring the driven shaft is securely fixed within the body, preventing detachment and maintaining stability during rotational force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ball-type universal joint is used in the torque receiving assembly, then the assembly can transmit rotational force, but the ball-type universal joint is prone to detachment from the flange during transportation, resulting in loss of transmitting function or working stability
Solution Approach 1:
The torque receiving assembly is divided into separate components: a flange with a groove and a driven shaft with a protrusion. The groove and protrusion form an engagement structure that prevents detachment while allowing assembly disassembly for maintenance and replacement.
Solution Approach 2:
The driven shaft protrusion is inserted into the flange groove, creating a nested engagement structure where the shaft is retained within the flange boundary, preventing detachment during transportation and operation.
2Adaptability or versatility
If the driven shaft is allowed to move freely in the axial direction, then the torque receiving assembly can accommodate positioning adjustments, but the driven shaft may detach from the body during operation
Solution Approach 1:
The driven shaft is designed with movable capability in the axial direction within the accommodating chamber, allowing dynamic positioning adjustment. The retaining cover provides a dynamic retention mechanism that maintains the shaft within the chamber while permitting controlled movement.
Solution Approach 2:
The retaining cover acts as an intermediary component between the driven shaft and the external environment, providing retention while allowing the shaft to move freely within the accommodating chamber for positioning adjustments.
3Reliability
If a retaining cover and urging spring are added to the torque receiving assembly, then the driven shaft is securely retained in the accommodating chamber, but the device complexity increases
Solution Approach 1:
The retaining cover and urging spring are combined into a single retention mechanism assembly that works together to secure the driven shaft. The spring is integrated within the chamber, eliminating the need for separate external retention components.
Solution Approach 2:
The urging spring provides automatic retention force to keep the driven shaft within the accommodating chamber. The spring self-adjusts to maintain contact and retention without requiring external control mechanisms or additional complexity.
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
The solution provides reliable and stable rotational force transmission by ensuring the driven shaft is securely integrated with the body, preventing detachment and enhancing the overall reliability and stability of the torque receiving assembly.
Implementation Method 1
an urging spring, said urging spring being interposed between said output arms and a bottom wall of said accommodating chamber for urging said driven shaft outwardly in said axis direction
Data Source
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AI summary
The present invention relates to a torque receiving assembly (200), a photosensitive drum (101) and a process cartridge (100) having such torque receiving assembly (200). the torque receiving assembly (200) comprising: a body (201)having an axis and having an accommodating chamber (209); a driven shaft (204) disposed coaxially with said body (201), the driven shaft (204) including a guide stem (215) and a coupling head (216) provided at one axial end of said guide stem (215), the guide stem (215) having a pair of output arms (217) which extend outwardly in a radial direction, the coupling head (216) having a plurality of projections (220); wherein a pair of input arms (210) are provided at an inner wall of the accommodating chamber (209) and configured for abutting with the output arms (217); the guide stem (215) is movable in the axial direction relative to the body (201), the torque receiving assembly (200) further comprises a distance-limiting mechanism that defines a maximum distance the driven shaft (204) is able to move relative to the body (201) in the axis direction.. The photosensitive drum (101) and process cartridge (100) according to the present invention both includes said torque receiving assembly (200).