Torsionally Elastic Coupling With Shared Bearing Preload
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Solution Overview
Problem
Existing coupling devices in drive technology face challenges in ensuring reliable operation of the bearing device while maintaining a simple structure, particularly in reducing wear and improving durability due to tolerance-related clearances in rolling bearings.
Innovation Solution
The solution involves axially preloading the rolling bearing using a tensioning device that also acts on the friction device, eliminating the need for separate clamping devices and allowing the clamping element to have a multiple function, thereby reducing bearing clearance and enhancing the reliability and simplicity of the coupling device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate clamping devices are provided for the bearing assembly and friction assembly, then each component can be properly preloaded, but the device complexity increases
Solution Approach 1:
The patent combines the clamping functions for the bearing assembly and friction assembly into a single integrated clamping device. This clamping device simultaneously applies preload forces to both the rolling bearing and the friction element, eliminating the need for separate clamping mechanisms while ensuring both components are properly preloaded for reliable operation
Solution Approach 2:
The clamping device is designed with multi-functionality, serving both to preload the bearing assembly and to preload the friction assembly through a single mechanism. This universal design reduces the overall number of components while maintaining the necessary preload forces on both subsystems
2Reliability
If rolling bearing clearance is not reduced, then the structure remains simple, but bearing durability and reliability deteriorate due to wear
Solution Approach 1:
The patent implements preliminary action by preloading the rolling bearing through the integrated clamping device before operation begins. This preliminary preload reduces the bearing clearance and eliminates play in the bearing, thereby improving durability and reducing wear from the outset of operation
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
This approach results in improved durability and reduced wear of the rolling bearing, ensuring a reliable function while simplifying the structure of the coupling device by combining the functions of the clamping element for both the friction and bearing devices, effectively reducing the number of required components.
Implementation Method 1
a friction device by means of which the hub side and the flange side are frictionally connected to each other in the circumferential direction
Implementation Method 2
The spring assembly provides several compression springs arranged adjacent to each other in the circumferential direction, each supported at one end by the coupling flange and at the other end by the coupling hub
Implementation Method 3
The bearing assembly has at least one rolling bearing
Data Source
Figure 1
AI summary
Coupling device (1) comprising a coupling hub (2) located radially inside with respect to a coupling axis of rotation and associated with a hub side of the coupling device, a coupling flange (3) located radially outside and associated with a flange side of the coupling device, a spring device (10) by means of which the hub side and the flange side are supported against each other in a circumferentially elastic manner in a torque-transmitting manner, wherein the spring device comprises at least one spring element which is supported in the circumferential direction at one end on the coupling hub and at the other end on the coupling flange, a bearing device (15) by means of which the hub side and the flange side are supported radially against each other and are rotatably mounted about the coupling axis of rotation, wherein the bearing device comprises at least one rolling bearing (16) on whose outer ring (17) the coupling hub is radially supported,and whose inner ring (18) is radially supported on a bearing journal associated with the flange side, and comprising a friction device (21) by means of which the hub side and the flange side are frictionally connected to each other in the circumferential direction in a torque-transmitting manner, for which the friction device comprises at least one friction element (22) and at least one friction surface (23), which are axially biased against each other to form the frictionally biased operative connection, is known. According to the invention, a clamping device (24) associated with the bearing device and the friction device is provided, such that a clamping device (24) associated with the bearing device and the friction device is provided, which comprises at least one clamping element (25) by means of which the friction device and the at least one rolling bearing are each axially biased.