Adjustable-Chisel Pneumatic Chipping Hammer for Tight Spaces

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Solution Overview

Problem

Existing pneumatic chipping hammers have complex structures that increase weight and labor intensity, are inconvenient for use in narrow spaces, and lack a flexible fulcrum for prying, especially for operators of different heights.

Innovation Solution

A pneumatic chipping hammer with a detachable chisel part and an integral air cylinder member, allowing adjustable mounting angles between the handle and main power part, and detachable wheels on the chisel for enhanced maneuverability and fulcrum support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If large parts with complex structures are used to ensure stability of the main power part, then stability is improved, but weight increases and labor intensity increases

Engineering Contradiction:
Improvestability of main power partVSAvoidproduct weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The main power part is divided into multiple components: air cylinder member, impact member, and connecting member. This segmentation allows each part to be optimized independently, reducing overall weight while maintaining stability through proper structural design of individual components.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The air cylinder member is designed as an integral member with built-in impact mechanism, allowing dynamic operation where the impact member reciprocates within the cavity. This dynamic design provides stability during operation without requiring excessive weight, as the stability is achieved through controlled motion rather than static mass.

Inventive Principle:
Principle #15Dynamics

2Device complexity

If a fixed handle is used, then structural simplicity is maintained, but convenience for people with different heights and in narrow spaces deteriorates

Engineering Contradiction:
Improvehandle structureVSAvoidconvenience for different heights and spaces
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The handle structure is made adjustable through the detachable chisel part mechanism. By allowing the chisel part to be mounted in different directions and positions, the effective handle length and angle can be adjusted to suit operators of different heights and for different working spaces, transforming a fixed structure into a dynamically adaptable one.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The main power part with detachable chisel part serves multiple functions: it can be configured for different operating heights, different working spaces, and different prying needs. This multi-functionality allows a single tool design to accommodate various user requirements without requiring multiple specialized tools.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Device complexity

If no fulcrum is provided, then device simplicity is maintained, but capability for prying operations deteriorates

Engineering Contradiction:
ImprovestructureVSAvoidprying capability
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The detachable chisel part serves dual purposes: it functions as both a chisel for impact operations and as a fulcrum for prying operations. This multi-functionality allows the tool to perform both chipping and prying tasks without requiring separate dedicated components, maintaining simplicity while enhancing versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The chisel part itself serves as the fulcrum for prying operations, eliminating the need for a separate fulcrum component. The tool uses its own existing structure (the chisel part) to provide the fulcrum function, achieving self-service and avoiding additional complexity.

Inventive Principle:
Principle #25Self-service

4Device complexity

If the mounting direction of the chisel part is fixed, then structural simplicity is maintained, but adaptability for different purposes and users deteriorates

Engineering Contradiction:
Improvemounting structureVSAvoidsuitability for different heights and purposes
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The mounting structure is designed to be dynamically adjustable rather than fixed. The locking member mechanism allows the chisel part to be mounted in different directions and positions, enabling the tool to adapt to different user heights, different working angles, and different operational requirements while maintaining a relatively simple structural design.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The locking member with elastic member and lock member is pre-configured to enable easy direction changes of the chisel part. This preliminary setup allows users to quickly adjust the mounting direction without complex tools or procedures, facilitating adaptability for different purposes and users while keeping the mounting structure simple.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12459099B2Pneumatic chipping hammer
Publication Date: 2025.11.04 HANGZHOU UNITED TOOLS CO LTD
  • US12459099B2 patent drawing
  • US12459099B2 patent drawing
  • US12459099B2 patent drawing

AI summary

The present application discloses a pneumatic chipping hammer, and relates to a pneumatic impact tool, which comprises a handle part, the handle part being a hollow member; a main power part, one end of the main power part being connected to the handle part, and principal axes of the handle part and the main power part forming a certain angle; and a chisel part, the chisel part being detachably connected to the other end of the main power part, wherein the direction of mounting the chisel part on the main power part can be changed. According to the pneumatic chipping hammer of the present application, the mounting direction of the chisel part on the main power part is changed by the locking member, and therefore the angle between the principal axes of the handle part and the main power part can be 5-85 degrees, so that a handle is inclined to further achieve different purposes and be suitable for people with different heights.