Axle-Suspended Motor Coupling With Separate Radial Support and Damping
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Solution Overview
Problem
Existing couplings for axle-suspended direct drive motors have insufficient radial bearing capacity, leading to increased failure risk due to radial load being borne by shear force on rubber blocks, which results in short service life and inconvenient installation and maintenance.
Innovation Solution
A coupling design featuring a wheel axle side adapting flange and a motor side adapting flange connected through an elastic support rotating assembly, utilizing metal-rubber parts for radial and circumferential elastic connections, allowing for separate bearing and damping in radial and torsional directions, enhancing radial bearing capacity and reducing vibration-induced creep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rubber blocks are used to bear radial load through shear force, then the coupling can be installed, but the radial bearing capacity is insufficient and service life is short
Solution Approach 1:
The coupling is divided into two independent functional parts: elastic support blocks for radial bearing and rubber blocks for circumferential damping. This segmentation allows each component to specialize in its optimal function, with elastic support blocks bearing radial loads without shear stress and rubber blocks providing torsional vibration damping.
Solution Approach 2:
The load-bearing function is separated from the damping function by introducing a new spatial dimension. Elastic support blocks handle radial loads through axial compression, while rubber blocks handle circumferential damping through torsional deformation, operating in different dimensional planes.
2Ease of manufacture
If rubber blocks are pre-compressed for installation, then the coupling can be assembled, but complex special fixtures are needed making installation and maintenance inconvenient
Solution Approach 1:
The elastic support blocks are pre-compressed during assembly to enable the rubber blocks to be installed in their original positions without requiring complex pre-compression fixtures. This preliminary action simplifies the installation process while ensuring proper positioning of all components.
3Adaptability or versatility
If motor side connecting structure and wheel axle side connecting structure are not aligned, then the coupling can accommodate misalignment, but rubber blocks cannot be installed in place simultaneously requiring complex fixtures
Solution Approach 1:
The connecting structures are segmented into motor side and wheel axle side components with independent positioning features. The elastic support blocks provide alignment tolerance while the rubber blocks are installed in predetermined positions, allowing misalignment accommodation without compromising installation ease.
4Extent of automation
If elastic suspension device bears motor weight, then the motor can be axially suspended, but the structural reliability and performance stability are tested
Solution Approach 1:
The suspension system is segmented into elastic support blocks for radial load bearing and rubber blocks for circumferential damping. This segmentation allows the elastic support blocks to bear motor weight radially without shear stress, improving structural reliability while maintaining the axle-suspended installation configuration.
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 design achieves improved radial bearing capacity, extended service life of metal-rubber parts, simplified installation, and enhanced maintenance convenience by allowing alignment connection and separate directional damping, reducing system failure risks and improving reliability.
Implementation Method 1
an elastic support rotating assembly, wherein the elastic support rotating assembly is radially connected between the wheel axle side adapting flange and the motor side adapting flange so that the wheel axle side adapting flange and the motor side adapting flange can be coaxially and rotatably connected and bear the weight of the motor along the radial direction through the elastic support rotating assembly
Implementation Method 2
the wheel axle side adapting flange and the motor side adapting flange are circumferentially elastically connected
Implementation Method 3
can obtain better damping buffering effects while achieving great radial bearing capacity
Implementation Method 4
utilizing metal-rubber parts for radial and circumferential elastic connections, allowing for separate bearing and damping in radial and torsional directions, enhancing radial bearing capacity and reducing vibration-induced creep
Data Source
AI summary
A coupling for axle-suspended installation of a direct drive motor, comprises a wheel axle side adapting flange coaxially fixed with a wheel axle and a motor side adapting flange coaxially fixed with the rotor shaft of a motor, an elastic support rotating assembly, wherein the elastic support rotating assembly is radially connected between the wheel axle side adapting flange and the motor side adapting flange so that the wheel axle side adapting flange and the motor side adapting flange can be coaxially and rotatably connected and bear the weight of the motor along the radial direction through the elastic support rotating assembly, and the wheel axle side adapting flange and the motor side adapting flange are circumferentially elastically connected. It also provides stiffness design method of coupling for axle-suspended installation of direct drive motor.