Eccentric Jaw Crusher Mounting Assembly
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Solution Overview
Problem
Jaw crushers face challenges in optimizing capacity without compromising other physical and operational characteristics, such as increasing the throw of the movable jaw while maintaining acceptable power-draw and reducing noise emission.
Innovation Solution
A crushing jaw mounting assembly with an eccentrically mounted shaft and bearings, where the central axis of the jaw bearing is offset from the frame bearing by a distance of 20 mm to 35 mm, providing a desired throw and displacement of the movable jaw, and stabilizing the gyroscopic procession with a larger inner diameter jaw bearing and smaller frame bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the throw of the movable jaw is increased to maximize capacity, then the crusher throughput is improved, but the power-draw increases and noise emission increases
Solution Approach 1:
The invention changes the geometric parameters of the mounting assembly, specifically the eccentricity distance between the jaw bearing and frame bearing axes, to optimize the throw characteristics. This allows capacity maximization with controlled power-draw by adjusting the eccentric offset rather than simply increasing overall jaw throw
Solution Approach 2:
The invention introduces asymmetric positioning of the jaw bearing relative to the frame bearing, with the jaw bearing offset by 20-35mm from the frame bearing axis. This asymmetric configuration creates optimized throw characteristics that improve capacity while controlling power requirements through the specific geometric relationship
2Productivity
If the throw of the movable jaw is increased to maximize capacity, then the crusher throughput is improved, but noise emission increases
Solution Approach 1:
By optimizing the eccentricity parameters (20-35mm offset) and bearing dimensions, the invention achieves capacity maximization with reduced operational speed requirements, thereby reducing noise emission from the moving components
3Stability of the object's composition
If the jaw bearing inner diameter is increased to stabilize gyroscopic procession, then the mounting stability is improved, but the overall weight of the crusher increases
Solution Approach 1:
The invention applies local quality optimization by specifying that the jaw bearing inner diameter be greater than the frame bearing inner diameter (by at least twice the offset distance, 40-80mm difference). This localized dimensional difference stabilizes the gyroscopic procession without requiring a proportional increase in overall crusher weight
Solution Approach 2:
The invention optimizes the dimensional parameters of the bearings, specifically setting the jaw bearing inner diameter larger than the frame bearing inner diameter by a specific amount (40-80mm). This parameter optimization achieves gyroscopic stability while controlling overall weight through precise dimensional design rather than uniform scaling
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
This configuration maximizes crusher capacity, reduces operational speed for lower noise emission, and avoids damaging forces, while maintaining a stable and lightweight design compatible with existing mechanisms.
Implementation Method 1
a central axis of the eccentrically mounted jaw bearing is offset from a central axis of the frame bearing by a distance in the range 20 mm to 35 mm
Data Source
AI summary
A mounting assembly to mount a jaw at a jaw crusher. The assembly comprises a rotatable shaft having a jaw bearing mount region that is eccentric relative to a longitudinal axis of the shaft such that a central axis of a jaw bearing that mounts the jaw at the crusher is off-set from a central axis of a frame bearing that mounts the shaft at the crusher by a distance in the range 20 mm to 35 mm.