Bucket Jaw Crusher Toggle Plate Inversion
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Solution Overview
Problem
Conventional bucket type jaw crushers face issues with weak crushing power, rapid wear of load receiving sections, labor-intensive maintenance, large gripping angles, poor crushing performance, and difficulty in removing clogged objects due to the inclined toggle plate and separate spare teeth plates.
Innovation Solution
A bucket type jaw crusher design featuring a toggle plate with the movable jaw teeth side load receiving section positioned above the bucket side load receiving section, a counterweight on the eccentric main shaft for balanced motion, wavy teeth for improved gripping, and a tension device for automatic inclination adjustment, along with grease supply holes for simplified lubrication and easy replacement of load receiving sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the toggle plate is installed with a state inclined downward toward its tip, then the movable jaw teeth can reciprocate, but crushing power becomes weak and crushing into fines is difficult
Solution Approach 1:
The toggle plate is inverted so that it is inclined upward toward its tip instead of downward. This inversion changes the direction of the reaction force, allowing the movable jaw teeth to press the object to be crushed strongly against the stationary jaw teeth, thereby improving crushing power while maintaining reciprocating motion capability
2Productivity
If the load receiving sections are used frequently, then crushing operation continues, but the load receiving sections wear out rapidly requiring frequent replacement
Solution Approach 1:
The load receiving sections are designed as separable, replaceable components that can be independently replaced without replacing the entire toggle plate. This segmentation allows quick replacement of worn load receiving sections, maintaining productivity while managing wear through easy part replacement
3Reliability
If the toggle plate requires constant lubrication, then friction is reduced, but piping and maintenance require labor
Solution Approach 1:
The toggle plate is designed with built-in grease supply holes that allow direct grease application without requiring piping systems. The structure enables self-lubrication through simple grease holes, reducing maintenance complexity while ensuring proper lubrication of the load receiving sections
4Shape
If the stationary jaw teeth and movable jaw teeth are arranged in a V shape, then gripping angle increases, but crushing performance deteriorates
Solution Approach 1:
The jaw teeth are designed with wave-shaped surfaces that create multiple local contact points along the tooth surface. This local quality enhancement improves gripping capability through increased surface contact while maintaining a smaller overall V-shaped angle, thereby improving crushing performance without sacrificing grip
5Stability of the object's composition
If the toggle plate is inclined downward, then the structure is stable, but enough space cannot be secured between movable and stationary jaw teeth for removing clogged objects
Solution Approach 1:
The toggle plate is inverted to incline upward toward its tip, which changes the force distribution and allows sufficient space to be secured between the movable and stationary jaw teeth. This inversion maintains structural stability while enabling easy removal of clogged objects by allowing the movable jaw teeth to be positioned away from the stationary jaw teeth
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
Enhances crushing efficiency into fines, reduces maintenance labor, improves gripping and grinding performance, allows quick removal of clogged objects, and requires only one spare teeth plate, while maintaining balanced crushing speed and efficient operation.
Implementation Method 1
a counterweight for balance adjustment is provided at an intermediate portion of the eccentric main shaft between the hydraulic motor and the flywheel
Implementation Method 2
a counterweight for balance adjustment is provided at an intermediate portion of the eccentric main shaft between the hydraulic motor and the flywheel
Implementation Method 3
a wavy tooth 21 of the stationary jaw teeth and a wavy tooth 31 of the movable jaw teeth are formed in a vertically gentle arc shape
Implementation Method 4
a wavy tooth 21 of the stationary jaw teeth and a wavy tooth 31 of the movable jaw teeth are formed in a vertically gentle arc shape
Implementation Method 5
Grease supply holes 5102, 5103 are formed in the toggle plate 51
Data Source
AI summary
A bucket type jaw crusher comprises a hydraulic motor connected to one end of an eccentric main shaft, a flywheel connected to the other end of the eccentric main shaft, and a counterweight for balance adjustment fitted at an intermediate section of the eccentric main shaft between the hydraulic motor and the flywheel. A movable jaw teeth side load receiving section of a toggle plate is placed at an upper position than a bucket side load receiving section of the toggle plate, and while movable jaw teeth are reciprocated by rotation of the eccentric shaft, an object to be crushed is pressed against stationary jaw teeth by the movable jaw teeth via rocking motion of the toggle plate.