Release Gear Blocking Lever for Defined Output Rotation
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Solution Overview
Problem
Electromotorized opening drives for motor vehicle door latches often experience oscillations or uncontrolled movements due to elasticities in plastic components, leading to unusual noise and indifferent functional states.
Innovation Solution
A drive unit with a blocking element that is transferred from a resting position to a blocking position through a rotational movement of the output element, limiting rotation to a specified point by detaching from a stop, ensuring the blocking element stops further movement, thus preventing indifferent functional states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blocking element is pre-tensioned into a blocking position with spring force (as in prior art), then the blocking position is secured, but elasticities in plastic components cause oscillations and uncontrolled movements
Solution Approach 1:
The blocking element is transferred into the blocking position during the rotation process itself, rather than being pre-positioned. The protrusion on the output element actively transfers the blocking element to the blocking position on the guide lever, ensuring precise timing and eliminating elastic oscillations associated with spring pre-tensioning.
Solution Approach 2:
The invention replaces the spring-based pre-tensioning mechanism with a direct mechanical transfer mechanism. The protrusion on the rotating output element directly engages and transfers the blocking element to the blocking position, eliminating the need for elastic components that cause oscillations.
2Measurement precision
If the blocking element is held firm in the resting position with a stop, then the starting position is defined, but the stop prevents smooth transfer to the blocking position
Solution Approach 1:
The protrusion is positioned on the output element such that it actively engages the blocking element and transfers it to the blocking position during rotation. This preliminary positioning action ensures both precise position definition and smooth transfer without the need for a physical stop that would cause abrupt engagement.
Data Source
AI summary
The object of the present invention is a drive unit for a motor vehicle component with an electromotor (5) and a rotatable output element (7). Furthermore, a blocking element (9), which can be acted on by an actuator (10), is provided for interacting with a protrusion (15) on the output element (7). According to the invention, the protrusion (15) detaches the blocking element (9) from a stop (17) at the start of a rotational movement of the output element (7). Thus, the blocking element (9) is transferred into a blocking position with the aid of the actuator (10) in which the blocking element (9) blocks a rotation of the output element (7) beyond a specified point.