Pin Locating Assembly Ram Play Reduction
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Solution Overview
Problem
Shot pin assemblies experience 'play' or flex between the ram and housing, leading to axial rotation issues.
Innovation Solution
The locating pin assembly incorporates a bearing coupled to the ram, engaging a bearing wedge to reduce or eliminate 'play' by using roller bearings and angled surfaces, along with adjustable stops and jam screws to prevent axial rotation, ensuring precise movement and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional shot pin assembly is used, then the structure is simple, but 'play' or flex occurs between the ram and housing causing axial rotation
Solution Approach 1:
A bearing is introduced as an intermediary component between the ram and housing to eliminate direct contact and reduce play. The bearing acts as a mediator that maintains precise positioning while allowing controlled movement, resolving the contradiction between simplicity and precision by adding a specialized intermediate element.
Solution Approach 2:
The bearing is extracted as a separate, removable component from the integrated ram-housing structure. This allows the bearing to be independently selected, replaced, and adjusted to optimize precision while maintaining overall system simplicity through modular design.
2Manufacturing precision
If bearing wedges and roller bearings are added to eliminate play, then axial rotation is prevented, but the device complexity increases
Solution Approach 1:
Multiple functional elements (bearing wedge, roller bearing, adjustment mechanism) are merged into a single integrated bearing assembly unit. This consolidation achieves high alignment precision through the combined action of these elements while reducing the number of separate components that would otherwise need to be individually installed and adjusted.
Solution Approach 2:
The bearing assembly incorporates adjustable elements that allow dynamic adaptation of the fit between ram and housing. This enables the system to achieve optimal precision for different operating conditions without requiring multiple fixed-design components, thereby improving precision while controlling complexity through adaptability.
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 effectively minimizes axial rotation and 'play' between the ram and housing, enhancing the precision and reliability of the shot pin assembly by utilizing roller bearings and bearing wedges to maintain optimal tolerance and prevent twisting.
Implementation Method 1
a bearing coupled to the ram configured to engage a bearing wedge to reduce the 'play' between the ram and internal components of the assembly
Implementation Method 2
a bearing wedge located on the first surface of the wedge. The bearing is attached to the ram which engages the bearing wedge to limit axial rotation of the ram
Data Source
AI summary
A locating pin assembly is provided. The assembly includes a body and a cylinder assembly for moving a ram in a reciprocally linear manner. A bearing is coupled to the ram and configured to engage a bearing wedge to reduce “play” between the ram and the assembly. Illustratively, the bearing and bearing wedge reduce or substantially eliminate this “play” to prevent axial rotation of the ram.