Adjustable Roller Lever Actuator for Variable Valve Strokes
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Solution Overview
Problem
Existing roller lever actuating devices are limited in their ability to adapt to different applications, requiring separate devices for varying pivoting paths and strokes, which increases manufacturing and logistics costs.
Innovation Solution
The roller lever actuating device allows for multiple working positions of the pivot arm relative to the bearing base, enabling the same device to be used for different pivoting paths and strokes by adjusting the pivot bearing means, allowing for variable kinematic adaptation to various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate roller lever actuating devices are provided for each different application with varying pivoting paths and strokes, then the device can be precisely adapted to specific valve types, but manufacturing costs and logistics costs increase
Solution Approach 1:
The bearing base is designed with multiple pivot bearing units that can accommodate different pivot arms with varying pivoting paths. This allows a single actuating device type to serve multiple valve types (piston slide valves, poppet valves, etc.) with different stroke requirements, eliminating the need to manufacture separate actuator types for each application.
Solution Approach 2:
The pivot bearing means are segmented into multiple discrete units arranged on the bearing base. Each pivot bearing unit can independently support a pivot arm in a specific working position. This segmentation enables flexible configuration where the same bearing base can support different combinations of pivot bearing units to match different valve stroke requirements.
2Adaptability or versatility
If multiple types of roller lever actuating devices are manufactured for different applications, then each device can be optimized for its specific application, but warehousing and logistics costs increase
Solution Approach 1:
By designing the bearing base with multiple pivot bearing units that can accommodate different pivot arm configurations, the invention creates a universal actuating device platform. This single platform can be configured for different valve types through selective assembly of pivot bearing units and adjustment of pivot arm positions, significantly reducing the variety of unique actuator types that need to be manufactured, stored, and managed in logistics.
3Device complexity
If the roller lever is fixed in a single working position on the bearing base, then the device structure is simplified, but the device cannot be adapted to different valve types with different strokes
Solution Approach 1:
The pivot bearing units are designed to be adjustable rather than fixed. The pivot arm can be positioned at different working positions on the bearing base by selecting different pivot bearing units or adjusting the position of existing units. This dynamic configurability allows the same device structure to adapt to different valve types and stroke requirements without requiring completely different device designs.
Solution Approach 2:
The pivot bearing means are divided into multiple discrete, independently positionable units. This segmentation allows the pivot arm to be selectively positioned at different distances from the pivot axis by engaging different pivot bearing units, enabling the device to accommodate different valve strokes while maintaining a relatively simple overall structure.
Data Source
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AI summary
A roller lever valve arrangement (10) having at least one roller lever valve (1b) and a roller lever actuating device (2) are proposed, wherein the roller lever actuating device (2) has a bearing pedestal (6) which is fixed on a valve unit (3) and on which a roller lever (8) is mounted such that it can be pivoted about a pivot axis (7). The roller lever (8) has a pivoting arm (26) which can be attached on the bearing pedestal (6) with the aid of pivot bearing means (25) differently in such a way that different working positions result for the roller lever (8), which different working positions differ from one another in terms of the spacing between the pivot axis (7) and a force output section (33a, 33b) of the pivoting arm (26) which interacts with an actuating section (19) of the valve unit (3).