Hydraulic Service Tool for Mining Bit Sleeve Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mining machines face challenges in efficiently installing and removing bit sleeves from bit blocks due to the complexity of the cutting bit assemblies and the need for precise alignment and force application.
Innovation Solution
A service tool with an actuator assembly, rod, and nut system is used to facilitate the installation and removal of bit sleeves by applying fluid pressure and utilizing a swivel assembly for ease of alignment and movement, allowing for the sleeve to be inserted or extracted along the rod axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual methods are used to install and remove bit sleeves, then operational simplicity is maintained, but installation and removal efficiency are reduced
Solution Approach 1:
The patent employs a hydraulic actuator assembly that uses fluid pressure to automatically install and remove bit sleeves from bit blocks. The actuator includes a cylinder, piston, and rod mechanism that converts hydraulic pressure into mechanical force, enabling automated sleeve installation and removal without manual labor, thereby significantly improving productivity while managing device complexity through standardized hydraulic components.
2Manufacturing precision
If precise alignment is required for bit sleeve installation, then installation precision is improved, but alignment time and operational complexity increase
Solution Approach 1:
The tool is designed with pre-configured alignment features including guide surfaces and positioning mechanisms that automatically align the bit sleeve with the bit block bore before installation. The actuator assembly is positioned and oriented in advance to ensure proper alignment, eliminating the need for manual alignment adjustments during the installation process, thus achieving high precision without time loss.
Solution Approach 2:
The patent introduces alignment guide surfaces and positioning fixtures as intermediary elements between the bit sleeve and bit block. These guides ensure precise alignment by constraining the relative positions and orientations of the components during the installation process, automatically achieving accurate positioning without requiring manual alignment operations.
3Productivity
If force is applied to remove bit sleeves, then removal effectiveness is improved, but risk of damage to bit blocks increases
Solution Approach 1:
The hydraulic actuator assembly applies controlled force through a piston and rod mechanism to remove bit sleeves from bit blocks. The hydraulic system provides smooth, progressive force application that can be precisely controlled to achieve effective sleeve removal while preventing excessive force that could damage the bit block. The actuator includes force distribution features that concentrate force on the sleeve rather than the bit block.
Solution Approach 2:
The actuator assembly introduces intermediary force transmission elements including the rod, piston, and hydraulic fluid that mediate between the force source and the bit sleeve. These intermediaries allow for controlled force application and distribution, enabling effective sleeve removal while protecting the bit block from damage by preventing direct, uncontrolled force application.
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 tool enables efficient and precise installation and removal of bit sleeves, reducing manual handling and alignment issues, thereby improving operational efficiency and ease of use in mining machine maintenance.
Implementation Method 1
The cylinder includes an internal chamber supporting the ram and configured to be in fluid communication with a fluid source
Data Source
AI summary
A tool includes an actuator assembly, a rod, a first nut, and a second nut. The actuator assembly includes a cylinder, a ram, and a bore extending through the cylinder and the ram. The cylinder includes an internal chamber supporting the ram, a first end, a second end, and a reaction surface positioned proximate the first end. The ram is movable relative to the cylinder and positioned adjacent the second end of the cylinder. The rod extends through the bore of the actuator assembly. The first nut is selectively coupled to one of a first end of the rod and a second end of the rod, and defines a first dimension larger than the bore width of the bit block. The second nut is selectively coupled to the other of the first end of the rod and the second end of the rod, and defines a second dimension less than the bore width.