Breaking Hammer Shield Mounting Using a Tool Bushing
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Solution Overview
Problem
Existing breaking hammers face issues with mechanical wearing and deformation due to their complex structure and mounting, which complicates maintenance and increases weight and visual obstruction.
Innovation Solution
A shield arrangement for breaking hammers featuring a removable and changeable shield element, fastened using a tool bushing and transverse locking pins, providing mechanical protection without screws or fastening holes, and utilizing a tool bushing as both a support and fastening element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield element is added to protect the breaking hammer body, then mechanical protection and durability are improved, but device complexity and mounting difficulty increase
Solution Approach 1:
The patent combines the fastening function and support function into a single integrated tool bushing element. The tool bushing serves dual purposes: it fastens the shield element to the breaking hammer body while also supporting the breaking tool. This merging of functions reduces the number of separate components needed, simplifying the overall structure while maintaining protective functionality.
Solution Approach 2:
The tool bushing is designed as a multi-functional element that performs multiple tasks simultaneously. It acts as both a fastening element for the shield and a support element for the breaking tool. This universal design allows a single component to fulfill multiple roles, reducing device complexity while providing the necessary mechanical protection.
2Reliability
If traditional fastening elements (screws, pins) are used to mount the shield element, then secure fastening is achieved, but vulnerability to damage and structural complexity increase
Solution Approach 1:
The patent removes traditional fastening elements such as screws, pins, and corresponding holes from the shield element design. By extracting these vulnerable components, the shield element becomes more resistant to damage from external forces. The fastening function is instead integrated into the tool bushing, eliminating the need for separate fastening hardware that could fail or be damaged.
3Reliability
If a full shield covers the entire breaking hammer body, then maximum protection is provided, but weight increases and visual obstruction occurs
Solution Approach 1:
The shield element is designed to provide protection only at the specific location where it is most needed - the tool side end part of the breaking hammer body that is subjected to intensive wearing during rock breaking operations. This localized protection approach provides adequate shielding where required while avoiding unnecessary weight and visual obstruction that would result from covering the entire body.
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 offers a simple, durable, and lightweight protection that is easy to mount and replace, reducing wear and deformation while minimizing visual obstruction and maintaining structural integrity.
Implementation Method 1
fastening of the shield element is based on shape locking principle and the shield element is without any fastening screws, fastening screw holes, pins or corresponding elements intended for the fastening
Implementation Method 2
the tool bushing is provided with slide bearing surfaces on its inner surfaces
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A shield arrangement, breaking hammer and method of protecting body of a breaking hammer. The shield arrangement (7) comprises a shield element (11) which is mounted to the body (8) by means of a separate sleeve-like element passing through an opening (26) of the shield element. The sleeve-like element is a tool bushing (9) which also provides support for a breaking tool (6).