Jaw Crusher Service Tool for Toggle Plate Maintenance Safety
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Solution Overview
Problem
Jaw crushers pose health and safety risks during maintenance due to the manual handling of heavy and cumbersome components like toggle plates, and the hydraulic systems can pose additional safety hazards when the motor is switched off.
Innovation Solution
A jaw crusher service tool with a support frame that allows safe handling and storage of heavy components, and a hydraulic system with an auxiliary pump that operates independently of the jaw crusher motor to keep the movable jaw open during maintenance, reducing the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual handling of heavy components like toggle plates is used during maintenance, then equipment servicing can be performed, but health and safety risks increase significantly
Solution Approach 1:
The patent introduces a service tool as an intermediary device between the heavy toggle plate and the operator. This tool includes a support frame with articulation axes that can be positioned to support the toggle plate during removal and installation, eliminating the need for direct manual handling of the heavy component while enabling maintenance operations to proceed
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 gained, but access time is reduced once the motor is switched off
Solution Approach 1:
The service tool is pre-positioned and ready before the motor is activated. The support frame is articulated to the mounting on the crusher frame in advance, so that when the movable jaw is locked open by motor activation, the service tool is already in position to support the toggle plate immediately upon jaw opening, maximizing the available access time
3Ease of operation
If the motor is switched off to allow manual access to the toggle plate, then manual handling becomes possible, but the hydraulic fluid returns under gravity causing closure of the movable jaw creating safety hazards
Solution Approach 1:
The service tool acts as a mediator that remains in position during motor shutdown. The support frame, already articulated to the crusher frame, continues to support the toggle plate even when the movable jaw closes due to hydraulic fluid return, preventing the jaw from crushing the component or injuring personnel
4Object-affected harmful factors
If a service tool with support frame is introduced for safe component handling, then safety is improved, but device complexity increases
Solution Approach 1:
The service tool is designed with multi-functionality to reduce overall complexity. The support frame can be articulated to different positions on the crusher frame and can support various heavy components including toggle plates and other jaw crusher components, making a single tool serve multiple maintenance functions
Solution Approach 2:
The service tool is divided into separable components: the support frame with articulation axes and the detachable mounting. This segmentation allows the mounting to be removed and repositioned on different parts of the crusher frame, providing flexibility without requiring a completely new tool design for each application
Data Source
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AI summary
A jaw crusher service tool (10) for supporting an item (15) during service of a jaw crusher (20) comprising a fixed jaw (30) and a movable jaw (40) mounted in a crusher frame (50) and defining a crushing chamber (60) for material to be crushed, the service tool (10) comprising a support frame (70) for supporting the item (15), and a jaw crusher mounting (80) attached to the support frame (70) for mounting the service tool (10) on a jaw crusher (20) in which the support frame (70) is movable about first and/or second articulation axes (90, 100) between a transport position and an item supporting position on the jaw crusher (20).