Jaw Crusher Lifting Assembly for Straight Toggle Plate Removal
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Solution Overview
Problem
Jaw crushers require manual handling of heavy and cumbersome components like toggle plates, posing health and safety risks, and the hydraulic system closure during maintenance presents additional safety hazards and reduces service time.
Innovation Solution
A lifting device integrated into the jaw crusher with pulleys and winches for safe access from above, combined with an auxiliary hydraulic pump that operates independently of the jaw crusher motor to keep the movable jaw open during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If manual handling of heavy components like toggle plates is performed from below, then component replacement can be effected, but health and safety risks increase significantly
Solution Approach 1:
The lifting device inverts the traditional manual handling approach by providing a mechanical lifting system that raises heavy components from below rather than requiring personnel to manually handle them from below. The pulley system with lifting cable enables safe retrieval and removal of heavy toggle plates and other components without direct manual contact.
Solution Approach 2:
The lifting device acts as an intermediary mechanism between the heavy components and the personnel. The pulley system, lifting cable, and associated mechanisms serve as mediating elements that transfer the weight and movement of heavy components away from direct human contact, thereby eliminating the harmful factors while maintaining repair capability.
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 fluid returns under gravity causing jaw closure which presents safety hazards and reduces service time
Solution Approach 1:
The auxiliary hydraulic pump performs preliminary action by pre-opening the movable jaw before the motor is switched off. This ensures that the jaw remains in the open position during the entire service operation, eliminating the need to wait for manual intervention to reopen it after motor shutdown, thereby preventing safety hazards and maximizing service time.
Solution Approach 2:
The auxiliary hydraulic pump enables the hydraulic system to serve itself by maintaining the open position of the movable jaw independently of the motor's operation. The system uses its own hydraulic resources to sustain the required position without external power input, ensuring continuous safety and accessibility throughout the service operation.
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
Facilitates safe and efficient servicing by allowing straight-line lifting of heavy components and maintaining the movable jaw open, reducing health risks and increasing service time.
Implementation Method 1
a primary pulley 90, 93, 94 mountable on a jaw crusher 20 above an item 100 to be lifted and configurable to lift the item 100 in a straight lift
Implementation Method 2
The lifting device facilitates access to heavy items such as toggle plates from above to facilitate safe and easy access during machine servicing
Implementation Method 3
Once the motor is switched off, the hydraulic fluid is returned through the hydraulic system under gravity resulting in closure of the movable jaw
Data Source
AI summary
A lifting device is configured to be integratable into a jaw crusher for facilitating access to items to be lifted from above during machine servicing. The crusher includes a crusher frame generally made up of oppositely disposed sidewalls and supporting a fixed jaw and a movable jaw defining a crushing chamber for material to be crushed. The lifting device has at least one primary pulley mountable on the jaw crusher above an item to be lifted and configured for lifting a toggle plate for a jaw crusher, wherein the lifting device is configurable to lift the item in a straight lift.