Slidable Driveshaft Coupling for Axial Vibration Damping
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Solution Overview
Problem
Existing driveshaft systems face challenges in effectively attenuating axial vibrations transmitted from the coupling to the driveshaft, leading to stress and potential damage.
Innovation Solution
A driveshaft assembly with a coupling device that includes a gear part with extending grooves, a retaining element with a sleeve and bellow for axial movement, and a flexible body with coupling elements to absorb and dampen vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a rigid coupling is used to transmit torque from the motor to the driveshaft, then torque transmission efficiency is improved, but axial vibrations and impacts are transmitted directly to the driveshaft causing stress and potential damage
Solution Approach 1:
The patent introduces a movable carrier part with a sleeve that fits to the gear part in axially slidable manner as an intermediary between the rigid coupling and the driveshaft. This mediator allows torque transmission while absorbing axial vibrations and impacts through controlled axial movement, preventing direct transmission of harmful forces to the driveshaft.
Solution Approach 2:
The patent changes the axial position parameter of the coupling components by allowing the sleeve to slide axially on the gear part. This parameter change enables the system to accommodate axial vibrations and impacts by varying the axial distance between the coupling and driveshaft connection points, thereby reducing stress transmission.
2Object-affected harmful factors
If the coupling is made movable in axial direction to dampen vibrations, then vibration damping is improved, but torque transmission reliability may be compromised
Solution Approach 1:
The patent implements a dynamic coupling system where the sleeve can move axially on the gear part while maintaining rotational connection. This dynamic design allows the system to adapt to vibration conditions while ensuring continuous torque transmission through the retaining element that connects the movable carrier part to the driveshaft, maintaining reliability during operation.
Solution Approach 2:
The patent segments the coupling system into distinct functional components: a movable carrier part with axial movement capability for vibration damping, and a retaining element that ensures rotational connection and torque transmission. This segmentation allows each component to perform its specific function optimally without compromising overall system reliability.
3Device complexity
If a simple rigid connection is used between coupling and driveshaft, then device complexity is reduced, but vibration attenuation capability is insufficient
Solution Approach 1:
The patent introduces controlled dynamics into the coupling system by allowing axial movement of the sleeve on the gear part. This dynamic capability is achieved through a relatively simple structure where the sleeve slides axially while the retaining element maintains rotational connection, adding vibration attenuation functionality without significantly increasing overall device complexity.
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 effectively damps axial vibrations and compensates for axial loads, reducing stress on the driveshaft and enhancing its durability and performance.
Implementation Method 1
axial loads to the driveshaft via the coupling-connected drive assembly (eg transmission connection) are substantially damped by the movable carrier part at the front shaft end
Implementation Method 2
a bellow is fixed from one end to the sleeve and from the other end at least partially to the connection end such that radially covering the gear part
Implementation Method 3
The flat flexible body provides a rotatable bearing for the coupling and partially absorbs the vibrations from the coupling to the holding part by means of its flexible structure
Data Source
AI summary
A driveshaft assembly comprising an elongated front shaft (3), a retaining element (10) being engaged from a connection end (50) with the front shaft (3) in a co-rotating manner and a coupling device (20) secured to the front shaft (3) by means of the retaining element (10) is provided. The driveshaft further comprises a gear part (52) which is extending on the connection end (50) and the retaining element (10) is having a sleeve (17) fits to the gear part (52) in axially slidable manner.