Electric Hammer Handle Design for Motor Integration and Grip Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric hammers with spade attachments face limitations in handling and mobility, particularly when used for tasks beyond excavation, such as demolition or removing resistant materials, due to restricted space for batteries and complex drive mechanisms, and require frequent compressor adjustments for pneumatic tools.
Innovation Solution
A hand-held electric hammer with a T-handle and additional handle stub, housing the electric motor in the stub, allowing one-handed operation, and featuring a brushless DC motor, lithium-ion battery, and adjustable operating modes, along with a control unit and display for enhanced usability and compatibility with various tool attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electric motor is integrated into the tool carrier shank, then the structure is more compact, but the battery space is reduced
Solution Approach 1:
The patent introduces an additional handle stub extending in a different spatial dimension from the main tool carrier shank, allowing the motor to be positioned in this new dimension rather than competing for space within the original shank volume. This dimensional extension resolves the space conflict between motor integration and battery capacity.
2Ease of operation
If a T-handle is used for two-handed operation, then control is improved, but the tool becomes less adaptable to different operating positions
Solution Approach 1:
The handle system is segmented into a main T-handle and an additional separate handle stub, allowing the user to select different grip configurations based on the task. The T-handle provides stable two-handed control for excavation, while the additional stub enables one-handed operation for overhead or demolition work, thus resolving the contradiction between control and adaptability.
3Temperature
If the electric motor is placed in the additional handle stub, then heat dissipation is improved, but the motor positioning becomes more complex
Solution Approach 1:
The additional handle stub acts as an intermediary structure that houses the motor and provides a thermal pathway away from the battery compartment. This intermediary element facilitates heat dissipation while managing the positioning complexity through a dedicated mounting structure that integrates the motor into the overall handle assembly.
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 design extends the electric hammer's application range, increases battery endurance, reduces weight and cost, and simplifies operation with improved heat dissipation and tool compatibility, enabling efficient use in various tasks without the need for frequent charging or compressor adjustments.
Implementation Method 1
brushless DC motor
Implementation Method 2
lithium-ion battery
Data Source
AI summary
A hand-held electric hammer includes a handle arrangement on a tool carrier shank in which a striking mechanism actuated by an electric motor is accommodated and at the lower end of which a tool holder is arranged, which is suitable for receiving a tool attachment in the form of a spade blade, a demolition chisel, or a PVC scraper. The handle arrangement is designed as a T-shaped T-handle seated on the tool carrier shank, so that on both sides of the tool carrier shank there are two handles for both a left and a right hand of a user, whereby in the lower half of the tool carrier shank an additional handle stub is attached protruding in parallel with the T-handle from the tool carrier shank, which allows the electric hammer to be gripped with one hand on the T-handle and with the other hand on the additional handle stub.