Integrated Encoder Alignment Device with Detent Spring
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Solution Overview
Problem
Conventional encoder alignment devices require multiple parts and are prone to damage during shipment due to movement, necessitating a more efficient and protective alignment solution for encoder discs and components.
Innovation Solution
An integrated alignment device with a contact portion, locating structure, flange structure, and spring structure that urges the hub into predetermined axial and radial positions, forming a detent for easy assembly and protection, while allowing lateral access to set screws and being removable by overcoming the detent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional gapping and centring devices are used, then alignment function is provided, but device complexity increases due to requiring at least two separate parts
Solution Approach 1:
The patent combines multiple alignment functions (gapping, centring, and securing) into a single integrated alignment device. This single device includes a body portion, flange structure, and spring structure all formed as one piece, eliminating the need for multiple separate parts while maintaining full alignment functionality.
Solution Approach 2:
The alignment device performs multiple functions simultaneously: it provides gapping between the encoder disc and detector, centring of the hub on the shaft, and securing through the detent mechanism. This multi-functional design reduces the number of components needed while achieving comprehensive alignment and protection.
2Ease of operation
If encoder disc and components are allowed to move during shipment, then handling flexibility is improved, but reliability decreases due to damage from contact and impact
Solution Approach 1:
The alignment device is installed on the shaft before the encoder disc is mounted. The spring structure is pre-compressed and the detent mechanism is prepared in advance, so that when the encoder disc is installed, it is immediately secured and prevented from moving during shipment without requiring additional protective measures.
Solution Approach 2:
The spring structure acts as a cushioning element that absorbs shocks and impacts during shipment. The spring is pre-compressed to provide continuous contact force, cushioning against sudden movements and preventing damage to the encoder disc and other components before damage can occur.
3Reliability
If alignment device secures hub firmly, then reliability is improved, but ease of operation worsens due to difficulty in removal
Solution Approach 1:
The detent mechanism provides dynamic securing: during normal operation, the spring structure maintains firm engagement between the detent and the hub groove for reliable positioning. For removal, the system allows dynamic change by permitting the alignment device to be pulled axially away, overcoming the detent and releasing the hub when needed.
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
Facilitates precise and easy mounting of encoder discs, reduces damage during shipment, and simplifies the installation process by ensuring accurate axial and radial alignment without the need for additional parts, enhancing handling and operational reliability.
Implementation Method 1
a spring structure configured to urge the hub into a predefined axial position by urging the hub toward the flange structure in the coupled arrangement
Data Source
Figure 1a
Figure 1b~1c
Figure 2
AI summary
An encoder device (5) includes: an encoder base (8); a hub (15) rotatably arranged in the encoder base (8) and arranged to carry an encoder disc; and an alignment device (12) arranged to urge the hub (15) into a predetermined axial and radial position relative to a portion of the housing, the alignment device (12) including a contact portion (30) arranged to contact an axial surface (31) of the encoder base (8), a locating structure (47, 52) arranged to maintain the alignment device (12) in a predefined radial position, a flange structure (32) arranged to contact an axial surface of the hub (15) and a circumferential portion of the hub (15), and a spring structure (40) arranged to urge the hub (15) axially toward the flange element, where the alignment device (12) urges the hub (15) into a predetermined axial and radial position relative to a portion of the encoder base (8), and the spring structure (40) contacts the hub (15) so as to form a detent, the detent allowing the alignment device (12) to be removed from the hub (15) by pulling the alignment device (12) axially away from the hub (15).