Pumpjack Brake Lock Linkage Mechanism
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Solution Overview
Problem
Existing pumpjack brake lock mechanisms are difficult and dangerous to engage, especially on larger pumpjacks, due to their high placement, requiring operators to climb or use ladders, which poses safety risks during maintenance and repair.
Innovation Solution
A latch apparatus with a linkage mechanism that allows the latch handle lever to be operated from a convenient, ground-level location, providing a mechanical advantage to easily move the latch dog into and out of engagement with the brake drum, eliminating the need for ladder access and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake lock mechanism is placed high on the pumpjack for proper mechanical engagement, then the locking function is effective, but the operator must climb or use ladders to access it, creating safety hazards
Solution Approach 1:
A linkage mechanism acts as an intermediary between the ground-level handle and the high-mounted brake lock. The linkage includes a first link connected to the handle, a second link connected to the brake lock, and a third link connecting the first and second links. This allows the operator to operate the brake lock from ground level while the actual locking mechanism remains in its effective high position on the pumpjack.
2Ease of operation
If the brake lock mechanism is placed at ground level for easy access, then operator safety and convenience are improved, but the mechanical engagement with the brake drum becomes ineffective
Solution Approach 1:
The solution separates the operator interface from the mechanical engagement point by introducing a spatial dimension through the linkage mechanism. The handle operates at ground level while the latch arm engages the brake drum at elevation. The linkage transmits motion through three-dimensional space, allowing the operator to apply force horizontally at ground level while the latch arm moves vertically to engage the brake drum.
3Device complexity
If a direct connection is made between the handle and brake lock, then the mechanism is simple, but the operator cannot reach the brake lock without climbing or using ladders
Solution Approach 1:
The connection between the handle and brake lock is segmented into three separate links rather than being a direct single connection. The first link connects the handle to the third link, the second link connects the brake lock to the third link, and the third link serves as the connecting element between the first and second links. This segmentation allows the mechanism to maintain relative simplicity while enabling ground-level operation through the extended reach of the linkage.
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 enables safe and efficient locking of pumpjack components by allowing operators to engage and disengage the brake from a safe distance, reducing the risk of accidents and improving operational convenience.
Implementation Method 1
A latch apparatus with a linkage mechanism that allows the latch handle lever to be operated from a convenient, ground-level location, providing a mechanical advantage to easily move the latch dog into and out of engagement with the brake drum
Data Source
AI summary
A brake lock system for a pumpjack brake apparatus comprises a latch handle lever pivotally mounted at a location on a pumpjack, a countershaft rotatably mounted on the pumpjack, latch handle linkage, and control linkage that transitions movement and force of the latch handle lever to a latch arm with a latch dog for pivoting the latch arm to insert the latch dog in a notch in the pumpjack brake apparatus. The latch handle, latch handle linkage, control linkage, and latch arm have dimensions that provide a mechanical advantage of the latch handle lever over the latch arm.