Axle-Hung Direct Drive Coupling for Radial Load and Damping
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Solution Overview
Problem
Existing axle-suspended direct drive motor couplings suffer from insufficient radial bearing capacity, easy damage of rubber blocks, and complex installation processes, leading to reduced service life and reliability.
Innovation Solution
A coupling design featuring a wheel axle side and motor side adapting flanges connected via an elastic support rotating assembly, utilizing metal-rubber parts for radial bearing and circumferential damping, allowing separate handling of radial and torsional vibrations, with easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wedge rubber blocks are used to connect motor and axle, then the coupling provides elastic suspension, but the radial bearing capacity is insufficient and rubber blocks are easy to damage
Solution Approach 1:
The coupling is divided into independent functional components: elastic rings for radial elasticity and wedge rubber blocks for torsional damping. This segmentation allows each component to specialize in its optimal function, with elastic rings bearing radial loads and rubber blocks handling torsional vibrations, thereby resolving the contradiction between radial bearing capacity and rubber block durability.
Solution Approach 2:
The invention transitions from a single-component wedge rubber block design to a two-dimensional solution combining elastic rings (radial direction) and wedge rubber blocks (torsional direction). This dimensional expansion allows independent optimization of radial bearing capacity through elastic ring pre-compression and torsional damping through wedge rubber block geometry.
2Ease of operation
If motor side and wheel axle side connecting structures are misaligned, then installation is simplified, but complex special fixtures are needed for pre-compression of rubber blocks
Solution Approach 1:
The elastic rings are pre-compressed during the assembly process by gradually approaching the motor side and wheel axle side connecting structures, eliminating the need for complex special fixtures. The pre-compression action is performed in-situ during installation, allowing rubber blocks to be installed in place without requiring separate pre-compression equipment.
Solution Approach 2:
The coupling structure enables self-alignment through the elastic deformation of rubber blocks and elastic rings, which automatically compensate for minor misalignments between motor side and wheel axle side connecting structures. This self-adjusting mechanism eliminates the need for precision alignment tools and complex fixtures.
3Adaptability or versatility
If elastic suspension device bears motor weight, then axle suspension is achieved, but structural reliability and performance stability are tested
Solution Approach 1:
The invention optimizes the parameters of elastic rings including pre-compression force, thickness, and material properties to simultaneously achieve axle suspension capability and high structural reliability. By carefully selecting and adjusting these parameters, the elastic suspension device can bear motor weight while maintaining performance stability and extending service life.
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
Enhances radial bearing capacity, improves damping buffering, extends service life, and simplifies installation and maintenance by using metal-rubber parts that reduce shear force on rubber blocks, ensuring alignment and 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
Implementation Method 2
utilizing metal-rubber parts for radial bearing and circumferential damping
Implementation Method 3
metal-rubber parts that reduce shear force on rubber blocks, ensuring alignment and reliability
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A coupling for axle-suspended installation of a direct drive motor, comprises a wheel axle side adapting flange (1) coaxially fixed with a wheel axle and a motor side adapting flange (2) coaxially fixed with the rotor shaft of a motor, an elastic support rotating assembly (3), wherein the elastic support rotating assembly (3) is radially connected between the wheel axle side adapting flange (1) and the motor side adapting flange (2) so that the wheel axle side adapting flange (1) and the motor side adapting flange (2) can be coaxially and rotatably connected and bear the weight of the motor along the radial direction through the elastic support rotating assembly (3), and the wheel axle side adapting flange (1) and the motor side adapting flange (2) are circumferentially elastically connected. The present invention can obtain better damping buffering effects while achieving great radial bearing capacity, reduce failure risk, extend the service life of metal-rubber parts, improve the use reliability of the coupling, easily realize the alignment connection of a wheel axle side adapting flange (1) and a motor side adapting flange (2) and enhance the installation reliability and convenience of the coupling, and the installation process is convenient and simple, which is convenient for maintenance and replacement. It also provides stiffness design method of coupling for axle-suspended installation of direct drive motor.