Breaking Hammer Insert Bushing with Anti-Jamming Intermediate Layer
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Solution Overview
Problem
The existing solutions for the lower bearing arrangement of breaking hammers are time-consuming and laborious to maintain, often requiring extensive dismantling and tooling, and can lead to jamming due to direct material contact between the insert bushing and the bearing support, especially under transverse loading and wear.
Innovation Solution
An insert bushing arrangement with an intermediate material layer between the bearing support and the insert bushing, which prevents jamming and facilitates easy maintenance by limiting axial movement and providing a non-adhesive interface, allowing for quick replacement without extensive tooling, using materials like aluminum, steel, or composite materials with coatings to reduce adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If an insert bushing arrangement is used to facilitate maintenance, then ease of repair is improved, but jamming and adhesion between the insert bushing and bearing support occurs due to direct material contact
Solution Approach 1:
An intermediate material layer is introduced between the insert bushing and the bearing support to prevent direct material contact. This intermediate layer acts as a mediator that eliminates adhesion and jamming between the dissimilar materials (e.g., aluminum insert bushing and steel bearing support), while still allowing the insert bushing to be removed for maintenance purposes.
2Ease of operation
If the insert bushing is designed for easy removal, then ease of operation is improved, but extensive dismantling and tooling are required in existing solutions
Solution Approach 1:
The tool bushing system is segmented into multiple independent components: the bearing support (fixed to the frame), the intermediate material layer, and the insert bushing. This segmentation allows the insert bushing to be independently removed and replaced without dismantling the bearing support or other structural components, simplifying maintenance operations.
3Reliability
If the intermediate material layer is added to prevent adhesion, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The material properties of the intermediate layer are specifically selected to have poor adhesion tendency with both the bearing support material (e.g., steel) and the insert bushing material (e.g., aluminum or bronze). By changing the material parameters (selecting materials with appropriate surface properties), adhesion prevention is achieved without requiring complex manufacturing processes.
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 quick and easy maintenance of the breaking hammer's lower tool supporting arrangement, preventing jamming and adhesion, allowing for efficient replacement of the insert bushing at the work site without extensive equipment, thus improving operational efficiency and reducing maintenance time.
Implementation Method 1
material of the intermediate material has been selected so that it has good material resistance against adhesive sticking with the material of the bearing support and the insert bushing. This way adhering between the materials may be avoided.
Implementation Method 2
Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The formed oxide layer isolates the aluminum material from direct metal to metal contact between the insert bushing and the bearing support.
Implementation Method 3
An inner surface of the insert bushing serves as a slide bearing surface against a breaking tool
Data Source
AI summary
An insert bushing arrangement of a breaking hammer, a breaking hammer and a method of supporting a breaking tool of a breaking hammer is provided. The insert bushing arrangement includes a bearing support inside which an insert bushing is mountable. Between the bearing support and the insert bushing is one or more intermediate material layers for preventing jamming of the components.