Bearing Unit Structure for Stable Actuating Drive Gear Positioning
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Solution Overview
Problem
Existing actuating drives, such as parking brake actuators, suffer from increased component wear and operational noise due to undesirable movements of gear train components, leading to a higher likelihood of failure.
Innovation Solution
A bearing unit comprising a fixing element and a ring gear with a securing section, along with bearing axles, is used to securely mount and accommodate gear elements, maintaining precise tolerances and allowing for easy replacement of components, thereby reducing wear and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gear elements are mounted in the housing using existing supporting devices, then the actuating drive can be assembled, but undesirable movements of gear train components occur leading to increased component wear
Solution Approach 1:
The housing is divided into multiple functional sections: a bearing unit with bearing axles for precise gear element positioning, a fixing unit for securing the bearing unit, and a supporting device for the ring gear. This segmentation allows each component to perform its specific function optimally, preventing undesirable movements while maintaining assembly feasibility
Solution Approach 2:
Bearing axles are introduced as intermediary elements between the housing and gear elements. These bearing axles precisely define and maintain the distances between gear elements, acting as mediators that eliminate unwanted movements and ensure stable positioning throughout operation
2Reliability
If gear elements are securely fixed to eliminate movements, then component wear is reduced, but the complexity of the bearing unit increases
Solution Approach 1:
The bearing unit combines multiple functions into a single integrated structure: it houses the bearing axles, provides mounting positions for gear elements, and ensures precise spacing between components. This merging reduces the number of separate parts needed while achieving the goal of eliminating gear element movements and reducing operational noise
Solution Approach 2:
The bearing unit serves multiple purposes simultaneously: it supports and positions multiple gear elements, defines precise center distances between them, and prevents unwanted movements. This multi-functionality achieves noise reduction without proportionally increasing device complexity
3Stability of the object's composition
If the ring gear is made non-rotatably mountable to prevent movement, then gear train stability is improved, but the ease of assembly and maintenance is reduced
Solution Approach 1:
The fixing element is designed with threaded engagement that allows the bearing unit (and thus the ring gear) to be easily assembled and disassembled. During operation, the threaded connection provides stable, non-rotatable mounting, but during maintenance it can be quickly undone to enable component replacement or inspection
4Reliability
If precise tolerances are maintained between gear elements, then wear is minimized, but manufacturing precision requirements increase
Solution Approach 1:
The bearing axles are pre-installed in the bearing unit at precisely defined positions before the gear elements are mounted. This preliminary positioning ensures that when gear elements are assembled onto the bearing axles, the required precise tolerances and center distances are automatically achieved, reducing the overall manufacturing precision burden
Data Source
AI summary
In one aspect, a bearing unit for a motor and at least one gear element of an actuating drive includes at least one fixing element with which the motor is fixable and/or mountable in a housing of the actuating drive. The bearing unit also includes at least one ring gear having at least one securing section, the at least one ring gear being fixable and/or non-rotatably mountable in the housing via the at least one securing section. Additionally, the bearing unit includes at least one bearing axle that connects the at least one ring gear and the at least one fixing element.