Gearbox Drive Unit Radial Fixation for Thrust Washer
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Solution Overview
Problem
In multi-stage gear drive units, the thrust washer and damping element can detach and collide with gearbox components during operation due to spatial overlap, complicating assembly and potentially leading to mechanical issues.
Innovation Solution
A separate clamping washer is used as a fastening element, supported by spring elements, which is radially inserted into the transmission housing to securely fix the thrust washer and damping means, allowing for simplified assembly and effective axial play damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-stage gearbox is used instead of a single-stage gearbox, then the transmission functionality is improved, but the thrust washer and damping element can become detached and collide with gearbox components during operation
Solution Approach 1:
The invention separates the fixation function from the damping function by introducing a distinct fastening element (clamping washer) that works independently with spring elements, while the damping element (thrust washer) remains a separate component. This segmentation allows each component to perform its specific function reliably without interfering with others, even in multi-stage gearboxes with limited space.
Solution Approach 2:
The fastening element with spring elements is pre-configured to automatically secure the damping element in its mounting position before operation begins. The spring elements are pre-loaded to exert continuous radial clamping force, ensuring the damping element is firmly fixed from the start and preventing any detachment during subsequent operation.
2Reliability
If the thrust washer is firmly fixed radially in the transmission housing, then the reliability is improved, but the assembly process becomes more complex
Solution Approach 1:
The invention combines multiple functions into a single integrated fastening element: the clamping washer simultaneously provides radial clamping force through spring elements, positions the damping element axially, and secures it against detachment. This merging of functions reduces the number of separate components and simplifies the assembly process compared to using multiple separate fastening mechanisms.
Solution Approach 2:
The spring elements are designed to automatically exert radial clamping force on the fastening element, which in turn secures the damping element without requiring additional fastening operations or complex assembly steps. The system is self-securing through the elastic rebound of the spring elements, eliminating the need for separate fixation operations.
3Ease of manufacture
If spring elements are formed on the fastening element to brace it in the housing part, then the radial insertion process is simplified, but the manufacturing complexity of the fastening element increases
Solution Approach 1:
The fastening element utilizes elastic deformation as a key parameter, with spring elements that can be formed on the fastening element to provide radial bracing. The spring elements change their physical state from a compressed form during assembly to an expanded form during operation, automatically providing the necessary clamping force without complex adjustment mechanisms.
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 ensures reliable radial fixation of the damping means and thrust washer, simplifies the assembly process, and provides consistent axial shock damping throughout the service life by using a clamping washer with spring elements, allowing for efficient use of installation space and preventing component detachment.
Implementation Method 1
Spring elements can be formed very easily on the fastening element, which brace the fastening element in the housing part when it is radially inserted into the housing part. For this purpose, the fastening element has elastically resilient areas, for example on an outer circumference or on a central recess.
Implementation Method 2
If such a cylindrical damping element is inserted in an approximately angular recess in the housing, the damping element can still deform sufficiently under an axial load. As a result, sufficient axial play damping can be achieved over the entire service life of the transmission drive unit, in which axial shocks are also dynamically cushioned.
Data Source
Figure 1~2
AI summary
Gearbox drive unit (10) and a method for producing a gearbox drive unit (10), having an electrical drive motor (12) with an armature shaft (22), and having a gearbox (14), in particular a worm gearbox, arranged downstream from it, which gearbox (14) is operatively connected to the drive motor (12) via the armature shaft (22), and with at least one of the end faces (28) of the armature shaft (22) resting via a starting element (32) on a housing part (16), in which case the starting element (32) can be mounted in the housing part (16) radially with respect to the armature shaft (22), and in which case the starting element (32) is secured against radial movement by means of a separately formed attachment element (33).