Seat Angle Regulator Friction Torque Transmission
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Solution Overview
Problem
Current seat angle regulators experience delays in backrest regulation and generate noise due to manufacturing tolerances and gaps, leading to reduced comfort and increased wear on components.
Innovation Solution
A seat angle regulator with a resistance torque structure that includes a spring and friction material to transmit torque between the drive cam and eccentric wheel, eliminating the need for a void operation stroke and reducing noise by ensuring a constant resistance torque, thereby maintaining a steady load on the electric motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a wedge block is pressed tightly circumferentially by an elastic member to eliminate gaps inside the angle regulator, then manufacturing precision is improved, but device complexity increases and a void operation stroke is required causing delay
Solution Approach 1:
The patent changes the fundamental parameter of torque transmission from intermittent (after void stroke) to continuous. The friction-based torque transmission mechanism maintains constant contact between drive cam and eccentric wheel, eliminating the need for void operation stroke while achieving gap elimination through controlled friction pressure.
Solution Approach 2:
The patent replaces the traditional wedge block mechanical engagement system with a friction-based torque transmission system. Instead of using wedge blocks that require void strokes for engagement, the drive cam directly transmits torque to the eccentric wheel through controlled friction, simplifying the mechanical structure.
2Manufacturing precision
If a void operation stroke is provided for the drive cam to pass before driving the wedge block, then manufacturing tolerance is accommodated, but response time increases causing delay in backrest regulation
Solution Approach 1:
The patent ensures continuous useful action by maintaining constant friction-based torque transmission between the drive cam and eccentric wheel. The drive cam continuously drives the eccentric wheel without interruption, eliminating the void operation stroke and achieving continuous backrest regulation response.
3Device complexity
If the drive cam hits the static wedge block at high speed during reversing regulation, then the structure is simple, but noise is generated affecting comfort
Solution Approach 1:
The patent applies beforehand cushioning by using friction as a damping mechanism. The friction-based torque transmission gradually transfers motion from the drive cam to the eccentric wheel, cushioning the impact that would otherwise occur and eliminating high-speed hitting noise during reversing regulation.
4Use of energy by moving object
If the electric motor has no load during void operation stroke, then energy consumption is low, but the drive cam hits components at high speed generating noise
Solution Approach 1:
The patent ensures continuous useful action during the entire operation cycle, including what would traditionally be the void operation stroke period. The friction-based torque transmission maintains continuous engagement, ensuring the electric motor always has a controlled load, which prevents high-speed hitting and noise while managing energy consumption efficiently.
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 eliminates delays in backrest regulation, reduces noise, and maintains a consistent operation torque, enhancing the comfort and longevity of the seat angle regulator.
Implementation Method 1
a resistance torque structure for transmitting torque, wherein the resistance torque structure includes a spring
Implementation Method 2
a resistance torque structure for transmitting torque
Implementation Method 3
an eccentric wheel with a wedge block, wherein the inner toothed ring of the inner toothed plate is engaged with the outer toothed ring of the outer toothed plate, a hollow shaft shoulder is formed in a middle of the inner toothed plate, and the eccentric wheel is rotatably sheathed on an outer circumferential surface of the shaft shoulder
Implementation Method 4
the wedge block is disposed in the radial eccentric area; furthermore, under the action of a circumferential force applied by an elastic member, the eccentric wheel and the wedge block eliminate the gaps between the eccentric wheel and an shaft center hole of the inner toothed plate and between the engaged teeth
Data Source
AI summary
Disclosed are a seat angle regulator and a seat. The seat angle regulator comprises an inner toothed plate with an inner toothed ring, an outer toothed plate with an outer toothed ring, a wedge block, an eccentric wheel, and a drive component, wherein the inner toothed plate is engaged with the gears of the outer toothed plate, a shaft shoulder is formed in the middle of the inner toothed plate, and the eccentric wheel is sheathed on the outer circumferential face of the shaft shoulder. The drive component comprises a drive cam and a rotating shaft, with one end of the rotating shaft fixedly connected with the middle of the drive cam and the other end penetrating through the eccentric wheel and the shaft shoulder in succession and fixed on the outer end face of the inner toothed plate axially via a locating connector.