Dual Piston Lock Linkage for Compact Header Cylinder Locking
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Solution Overview
Problem
Existing cylinder lock mechanisms for agricultural equipment are cumbersome, time-consuming to operate, and lack sufficient strength to securely hold large modern headers and feeders, especially when space constraints limit their application.
Innovation Solution
A piston lock system comprising two cylinders with telescopically connected pistons and movable piston locks that can be simultaneously controlled via a control link, allowing for compact operation and secure locking of the pistons in the extended position, preventing accidental retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional cylinder lock mechanisms are used, then the locking function is provided, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent combines multiple lock members into a single integrated locking mechanism that simultaneously locks both cylinders. The lock bar with transverse slot design allows one locking action to secure both hydraulic actuators, eliminating the need for separate locking operations on each cylinder.
Solution Approach 2:
The locking mechanism is designed to perform multiple functions: it locks both cylinders simultaneously, provides a positive locking indication through the slot alignment, and can be operated from a single location. The universal design allows the same mechanism to handle different cylinder configurations.
2Strength
If traditional cylinder lock mechanisms are used, then the locking function is provided, but they lack sufficient strength to hold large modern headers and feeders
Solution Approach 1:
The lock member is segmented into multiple functional zones: the main lock bar body for strength, the transverse slot for positioning and indication, and the engagement surfaces for locking. This segmentation allows each part to be optimized for its specific function while maintaining overall structural integrity and strength.
Solution Approach 2:
The locking mechanism employs composite construction combining rigid locking surfaces with flexible positioning elements. The lock bar uses high-strength material for the body while incorporating a slot that provides both structural function and visual indication capability, creating a composite functional element.
3Area of stationary object
If space is constrained adjacent to cylinder assemblies, then installation space is saved, but lock members cannot rotate into place
Solution Approach 1:
Instead of rotating the lock members outward as in traditional designs, this invention inverts the approach by having the lock members slide linearly along the piston rod axis. The locking action occurs through axial movement rather than rotational movement, eliminating the need for lateral clearance space.
Solution Approach 2:
The locking mechanism transitions from a two-dimensional rotational motion (requiring lateral space) to a one-dimensional linear motion along the piston rod axis. This dimensional change allows the locking function to be achieved within the constrained space available adjacent to the cylinder assemblies.
Data Source
AI summary
A piston lock system having first and second cylinders, first and second pistons telescopically connected to the cylinders, and first and second piston locks. The piston locks are movable in a transverse direction within a planar region between the cylinders, between unlocked positions in which the piston locks are not located between the free ends of the cylinders and the free ends of the piston, and locked positions in which the piston locks are located between the free cylinder ends and the free piston ends. A control link is operatively connected to the piston locks, and configured to simultaneously move the piston locks between the locked and unlocked positions.