Jaw Crusher Toggle Plate Support for Safer Maintenance Access
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Solution Overview
Problem
Jaw crushers require manual handling of heavy and cumbersome toggle plates during servicing, posing significant health and safety risks, and existing hydraulic systems pose additional hazards due to automatic closure of the movable jaw.
Innovation Solution
A jaw crusher service tool with a support frame and articulation axes for safe handling of toggle plates, combined with a hydraulic system featuring an auxiliary pump that operates independently of the jaw crusher motor to keep the movable jaw open during maintenance, reducing manual handling and safety hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual handling of toggle plates is used during servicing, then the jaw crusher can be maintained, but health and safety risks increase due to the heavy weight of components
Solution Approach 1:
The patent applies the anti-weight principle by using a support frame with articulation axes that can bear and support the heavy toggle plate component during maintenance operations. This support structure effectively counteracts the weight of the component, allowing service personnel to handle it safely without being overwhelmed by its mass, thus resolving the contradiction between maintenance capability and safety risks.
2Ease of operation
If the jaw crusher motor is activated to lock open the movable jaw for toggle plate removal, then access to the toggle plate is enabled, but the hydraulic system creates safety hazards due to automatic closure upon motor shutdown
Solution Approach 1:
The patent applies preliminary action by positioning the support frame and articulation mechanism in advance to support the toggle plate before the motor is activated. This pre-positioning ensures that when the motor is shut down and hydraulic closure occurs, the component is already supported and secured, preventing sudden movements or drops that would create safety hazards, thus resolving the contradiction between ease of access and safety.
3Object-affected harmful factors
If the support frame is kept in a fixed position for component support, then safe handling is enabled, but the device loses versatility for different service positions
Solution Approach 1:
The patent applies dynamics by designing the support frame with articulation axes that allow it to move between different positions (transport position and service positions) while maintaining stability when supporting components. This dynamic capability enables the frame to adapt to various service requirements while providing safe support during actual component handling, resolving the contradiction between safety and versatility.
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 safer and more efficient servicing of jaw crushers by allowing secure support and manipulation of heavy components, and independent control of the movable jaw, minimizing health risks and enhancing operational safety.
Implementation Method 1
a hydraulic system having a primary pump line powered by the primary hydraulic pump for moving the movable jaw and clamping the toggle plate; wherein the hydraulic system comprises an auxiliary pump powered independently of the primary pump for effecting movement of the movable jaw
Data Source
AI summary
A jaw crusher service tool for supporting an item during service of a jaw crusher, which has a fixed jaw and a movable jaw mounted in a crusher frame that define a crushing chamber for material to be crushed, is provided. The service tool includes a support frame for supporting the item and a jaw crusher mounting attached to the support frame for mounting the service tool on the jaw crusher. The support frame is movable about first and/or second articulation axes between a transport position and an item supporting position on the jaw crusher.