Electric Clutch Actuator Spring-Loaded Thrust Piece Vibration Isolation
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Solution Overview
Problem
The electric clutch actuator in lorry drive trains experiences excessive wear in the spindle and spindle nut due to vibrations, leading to performance degradation and reduced lifespan.
Innovation Solution
Incorporating a relief piston with an elastic relief spring that separates the spindle from the guide piston, minimizing radial loads and vibrations, and using a slotted ring for reduced friction, allowing the spindle to return smoothly to the engaged position without transmitting vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spindle is directly connected to the spindle nut, then the axial stroke can be achieved, but excessive wear occurs due to vibrations and radial loads
Solution Approach 1:
The guide piston is introduced as an intermediary component between the spindle and the pressure plunger. It provides precise guidance for the spindle while isolating it from radial loads and vibrations. The guide piston's cylindrical surface in the guide sleeve ensures minimal friction and wear, protecting the spindle and spindle nut from excessive wear while maintaining reliable axial stroke transmission.
2Reliability
If the spindle is rigidly fixed to prevent wear, then wear resistance improves, but the clutch cannot smoothly return to engaged position
Solution Approach 1:
The system transitions from a rigid fixed connection to a dynamic guided connection. The guide piston can move axially within the guide sleeve, allowing the spindle to return smoothly to the engaged position under clutch spring force while maintaining precise alignment. This dynamic guidance system reduces friction and enables smooth operation without compromising wear resistance.
3Power
If the guide piston is directly connected to the pressure plunger, then force transmission is efficient, but vibrations are transmitted to the spindle
Solution Approach 1:
The guide piston serves as a mediator that decouples the force transmission path from the vibration transmission path. It transmits the axial disengagement force efficiently from the pressure plunger to the spindle while its guidance in the guide sleeve filters out radial vibrations and jolts, preventing them from reaching the spindle and spindle nut.
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 solution significantly reduces wear on the spindle and spindle nut, ensuring smooth operation and extended lifespan by decoupling the spindle from the guide piston during engagement, preventing vibration transmission and maintaining precise component positioning.
Implementation Method 1
the relief piston is urged elastically away from the guide piston towards the spindle
Implementation Method 2
Use is preferably made of a relief spring in order to elastically urge the guide piston and the relief piston relative to one another
Implementation Method 3
A groove, in which a sliding element is arranged, can be provided in the outer circumferential surface of the relief piston and/or of the guide piston. This sliding element allows the friction of the guide piston in the receptacle of the guide piston or the friction of the relief piston in the guide piston to be reduced.
Data Source
AI summary
An electric clutch actuator having a housing, an electric motor, a gear mechanism and a spindle which is coupled to the electric motor via the gear mechanism, wherein the spindle has an output end which acts on a relief piston which is displaceably mounted on a guide piston which is mounted so as to be displaceable in the housing, wherein the relief piston is urged elastically away from the guide piston towards the spindle.