Power Tool Hammer Mechanism with Multidirectional Vibration Isolation
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Solution Overview
Problem
Existing power tools with hammer mechanisms experience significant vibration during processing operations, particularly along the driving axis, which current vibration isolating measures fail to adequately address.
Innovation Solution
The power tool incorporates a dual-layered elastic connection system between the tool body and outer housing, allowing for sliding movement in the direction parallel to the driving axis, and additional elastic connections in directions intersecting this axis, combined with guide parts to guide this movement, reducing vibration transmission to the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a hammer mechanism is used to linearly drive a tool accessory, then processing capability is improved, but vibration is generated in the power tool
Solution Approach 1:
The patent introduces an outer housing as an intermediary component between the tool body and the handle. This outer housing absorbs and isolates the vibration generated by the hammer mechanism, preventing it from being directly transmitted to the handle and thereby reducing the harmful vibration effect on the user while maintaining the processing capability.
Solution Approach 2:
The patent divides the power tool into distinct segments: the tool body containing the hammer mechanism, the outer housing as a separate vibration-isolating layer, and the handle. This segmentation allows each component to be optimized independently, with the outer housing specifically designed to mitigate vibration while the tool body maintains processing power.
2Object-affected harmful factors
If vibration isolating measures are implemented, then vibration transmission is reduced, but device complexity increases
Solution Approach 1:
The outer housing serves multiple functions simultaneously: it acts as a vibration-isolating layer, provides structural support, and serves as a mounting platform for the handle. By making the outer housing multi-functional, the patent reduces vibration transmission without proportionally increasing device complexity, as the same component performs multiple roles.
3Object-affected harmful factors
If the outer housing is made movable relative to the tool body, then vibration isolation is improved, but structural stability deteriorates
Solution Approach 1:
The patent employs dynamic coupling between the tool body and outer housing, allowing controlled relative movement through elastic connections. This dynamic design enables the outer housing to move independently to absorb vibration while maintaining overall structural stability through the elastic restoring forces, achieving both vibration isolation and structural integrity.
Solution Approach 2:
The patent utilizes elastic members with specific stiffness parameters to connect the outer housing to the tool body. By carefully selecting and tuning the elastic parameters of these connecting members, the system achieves optimal balance between allowing sufficient movement for vibration isolation and maintaining enough rigidity for structural stability.
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
This configuration effectively suppresses vibration transmission in multiple directions, enhancing user comfort and operational stability by minimizing handle vibrations.
Implementation Method 1
The outer housing is elastically connected to the tool body such that the outer housing is slidable relative to the tool body in a first direction that is substantially parallel to the driving axis
Implementation Method 2
The handle is elastically connected at least to the outer housing. The handle is movable relative to the outer housing in the first direction and in at least one direction that intersects the first direction
Data Source
AI summary
A power tool having a hammer mechanism includes a motor, a driving mechanism operably connected to the motor and configured to at least linearly drive a tool accessory along a driving axis, a tool body that houses the motor and the driving mechanism, an outer housing elastically connected to the tool body such that the outer housing at least partially covers the tool body and being slidable relative to the tool body in a first direction substantially parallel to the driving axis, a guide part configured to guide sliding movement of the outer housing relative to the tool body, and a handle including a grip part extending in a second direction, the handle being elastically connected at least to the outer housing and being movable relative to the outer housing in the first direction and in at least one direction that intersects the first direction.