Adjustable Rear Leg Connection for Beam Pumping Unit Assembly
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Solution Overview
Problem
Inconsistent assembly processes in walking beam pumping units can lead to the rear leg of the Samson post contacting the horizontal surface at an angle, causing excessive shear and tensile forces on bolts, which may result in bolt failure due to exceeding design ratings.
Innovation Solution
An adjustable rear leg connection system within the Samson post, allowing for rotational and linear adjustments to ensure proper seating of the rear leg on the pedestal, reducing stress on bolts and enhancing assembly precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rear leg is rigidly fixed at a predetermined angle during assembly, then the assembly process is simple and quick, but the rear leg may contact the pedestal at an angle causing excessive bolt stress and potential failure
Solution Approach 1:
The rear leg is designed with an adjustable connection mechanism that allows it to transition from a fixed angular position during assembly to a precisely adjustable position during installation. The connection bracket includes multiple adjustment holes and positioning features that enable the rear leg to be rotated and shifted to achieve proper alignment with the pedestal, eliminating the rigidity problem while maintaining assembly efficiency.
Solution Approach 2:
The invention changes the angular parameter of the rear leg connection by providing multiple adjustment holes at different angles and positions on the connection bracket. This allows the installation angle of the rear leg to be adjusted based on actual alignment requirements, transforming the fixed parameter into a variable one that can be optimized for proper seating on the pedestal.
2Reliability
If the rear leg is made adjustable to ensure proper seating, then bolt stress is reduced and reliability improves, but the device complexity increases
Solution Approach 1:
The connection mechanism is segmented into distinct functional components: the connection bracket with adjustment holes, the rear leg with positioning features, and the fastening system. This segmentation allows each component to perform its specific function independently while maintaining overall simplicity. The adjustment holes are strategically positioned to provide necessary alignment options without requiring complex adjustment mechanisms.
Solution Approach 2:
The invention uses simple, inexpensive adjustment features such as pre-drilled adjustment holes and basic fastening elements rather than complex adjustable mechanisms. These simple features provide sufficient adjustment capability for proper alignment while keeping the overall device complexity low and maintenance requirements minimal.
3Manufacturing precision
If manual adjustment of the rear leg is required for proper alignment, then seating accuracy is improved, but the assembly time increases
Solution Approach 1:
The connection bracket is pre-designed with multiple adjustment holes positioned at optimal angles and locations based on anticipated alignment requirements. This preliminary preparation of adjustment options eliminates the need for complex real-time adjustments during assembly, as the proper alignment position is already built into the structure, allowing for quick selection and fixation.
Data Source
AI summary
A pump jack includes a base, a pedestal supported by the base and a Samson post that supports a walking beam. The Samson post includes a front leg that is supported by the base and a connection bracket affixed to the front leg. The Samson post further includes an adjustable rear leg that is connected between the connection bracket and the pedestal. The rear leg can be rotated and shifted up and down within the connection bracket to ensure that the opposite end of the rear leg is properly located on the pedestal.