Driver Seat Suspension Actuator Axial Load Management
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Solution Overview
Problem
Existing suspension systems, such as those in driver's seats, face challenges with high axial loads on actuating elements, non-linear rotation speed characteristics, and increased costs due to non-standardized drives, leading to reduced service life and comfort issues.
Innovation Solution
A suspension system with a kinematics system and a spring device that includes a bearing arrangement to absorb axial loads, using standardized components like electric motors and ball screw nuts, and an elastic damping element to achieve passive and active damping, ensuring linear rotation speed characteristics and reduced loading on the actuating element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-standardized drive (rotating field magnet with ball screw coupling rod) is used to achieve bidirectional active regulation, then vibration damping performance is improved, but implementation costs increase and service life decreases
Solution Approach 1:
The patent replaces expensive non-standardized drives with standardized, cost-effective components. The rotating field magnet is replaced by a linear motor, and the ball screw coupling rod is replaced by a direct-drive actuator with integrated force generator, significantly reducing implementation costs while maintaining vibration damping functionality
Solution Approach 2:
The patent substitutes complex mechanical transmission systems (ball screw, coupling rod, floating bearing cross connection) with a direct-drive actuating element that generates force electrically. This eliminates mechanical wear components and reduces the need for precision mechanical assemblies, thereby lowering costs and improving reliability
2Strength
If the actuating element is configured to withstand high axial loads, then structural stability is improved, but weight and space requirements increase
Solution Approach 1:
The patent replaces mechanical load-bearing structures with an electrically actuated system. The actuating element uses electromagnetic force generation instead of mechanical reinforcement, eliminating the need for heavy structural components to withstand axial loads
Solution Approach 2:
The patent changes the fundamental operating principle from mechanical force transmission to electrical force generation. By using a linear motor or direct-drive actuator, the system achieves high axial load capacity through electromagnetic fields rather than mechanical strength, significantly reducing weight
3Reliability
If a ball screw coupling rod with spring element is used for cushioning, then vibration damping is improved, but non-linear rotation speed characteristics reduce control precision
Solution Approach 1:
The patent eliminates the ball screw mechanism entirely by using a direct-drive actuating element. This substitution removes the non-linear relationship between rotation speed and linear displacement, providing direct and precise control over the suspension top part's position and motion
Solution Approach 2:
The patent separates the cushioning function (performed by the spring device) from the actuation function (performed by the direct-drive actuator). This segmentation allows the spring to handle vibration damping while the actuator provides precise, linear control without mechanical transmission complexities
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 reduces axial loads, achieves linear rotation speed characteristics, and uses standardized components to lower costs and increase the service life of the actuating element, enhancing comfort and safety by improving vibration damping.
Implementation Method 1
the actuating element has a bearing arrangement, preferably a ball bearing, which is arranged within the force flow between the two suspension parts in such a way that an axial load can be at least partially, preferably entirely, kept away from the driving axis of the actuating element
Implementation Method 2
The spring device is preferably also designed to passively damp relative movement of the two suspension parts in relation to one another
Implementation Method 3
The spring device is preferably designed as an elastic spring arrangement
Implementation Method 4
an elastic damping element to achieve passive and active damping
Data Source
AI summary
The invention relates to a suspension system (1), preferably a driver seat (1), comprising a first suspension part (10), preferably a frame (10) of the driver seat (1); a second suspension part (11), preferably a seat surface (11) of the driver seat (1), wherein the two suspension parts (10, 11) are movable relative to each other in at least one first spatial direction (Z), preferably in the vertical direction (Z); a kinematic system (12), preferably a scissor kinematic system (12) which is designed to connect the two suspension parts (10, 11) in a movable manner relative to each other at least in the first spatial direction (Z); a suspension device (13) which is designed to support the static load of the second suspension part (11); and an actuator (2) which is designed to introduce a force bidirectionally between the two suspension parts (10, 11) and thereby actively damp the relative movement between the two suspension parts (10, 11). The suspension system (1) is characterized in that the actuator (2) has a bearing (28), preferably a ball bearing (28), which is arranged within the power flow between the two suspension parts (10, 11) such that an axial load can be kept away from the driven axle of the actuator (2) at least partly, preferably completely.