Gearwheel Arrangement with Integrated Bayonet Lock
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Solution Overview
Problem
Existing gear arrangements are complex and require additional components for axial securing, which occupy space and complicate assembly, especially in confined environments.
Innovation Solution
A bayonet lock mechanism integrated within the gear arrangement, utilizing a spring element and securing elements on the hub or receiving hole, eliminates the need for external components like circlips, ensuring a compact, space-saving design that allows for easy assembly and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional circlip or separate axial securing component is used, then the axial securing function is provided, but the device complexity increases and space is occupied
Solution Approach 1:
The patent integrates the axial securing function directly into the gear wheel structure by forming the bayonet lock profile on the gear wheel's outer circumference. The securing elements (protrusions and recesses) are combined with the gear body itself, eliminating the need for separate circlips or axial securing components. This merging reduces device complexity while maintaining reliable axial securing.
Solution Approach 2:
The gear wheel is designed to perform multiple functions: power transmission through gear teeth engagement and axial securing through the integrated bayonet lock profile. The same structural features (protrusions and recesses on the gear outer circumference) provide both rotational positioning and axial retention, making the gear wheel a multi-functional component that eliminates separate securing elements.
2Device complexity
If the hub extends beyond the outer end face of the secondary gear wheel, then the bayonet lock can be implemented, but the axial dimension increases
Solution Approach 1:
The patent resolves the axial dimension issue by moving the bayonet lock securing elements from the axial direction to the radial direction. Instead of extending the hub axially beyond the gear end face, the protrusions and recesses are formed on the outer circumference of the gear wheel in the radial plane. This dimensional shift allows the bayonet lock to function without increasing the axial length of the assembly.
Solution Approach 2:
The bayonet lock securing elements are nested within the gear wheel structure itself. The protrusions and recesses are formed as integral features of the gear body, with the securing elements contained within the gear's outer diameter boundaries. This nesting approach allows the bayonet lock mechanism to be embedded within the existing gear geometry without requiring additional axial space.
3Reliability
If the spring element is placed outside the gearwheel arrangement, then it can function freely, but it becomes vulnerable to damage and increases overall size
Solution Approach 1:
The spring element is nested within the internal cavity of the gear wheel arrangement. The conical spring is positioned inside the hollow interior space of the gear body, utilizing the existing void space rather than occupying external volume. This nesting protects the spring from external damage while maintaining its functional freedom, and it does not increase the overall external dimensions of the gear assembly.
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 a compact, space-saving gear arrangement that simplifies assembly and handling in confined spaces, reduces noise by compensating for gear play, and enhances mechanical stability while protecting the spring element from damage.
Implementation Method 1
a spring element whose spring force acts in the circumferential direction and can achieve reversible rotation and also prestressing of both gears (main and secondary gear) against one another
Implementation Method 2
the secondary gear is mounted on the main gear in the assembly position for its axial securing by means of a bayonet lock
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a gearwheel arrangement (1), comprising a hub (4), a main gearwheel (2) carried by the hub (4), and a secondary gearwheel (3) that receives the hub (4) in a receiving hole (21) and is rotatable with respect to the main gearwheel in the circumferential direction (5). The secondary gearwheel can be preloaded in the circumferential direction by means of a spring element (6) completely enclosed within the gearwheel arrangement (1) and, in a mounted position of the gearwheel arrangement (1), is mounted in a secured manner in the axial direction on the main gearwheel (2). For the axial securing, at least one securing element (12) is arranged on the wall (20) of the receiving hole (21) and on the outside (16) of the hub (4), which interact in such a way that in the mounted position, both gearwheels (2, 3) are connected to each other in the manner of a bayonet closure. In the mounted position an axial free end of the hub (4) extends in the axial direction at most as far as a plane of the outer end face of the secondary gearwheel (3) facing axially away from the main gearwheel (2).