Force-Limiting Hammer Head Structure to Prevent Tapping Deflection
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Solution Overview
Problem
Conventional hammers or mallets with single-piece designs experience deflection and reduced service life during tapping due to reaction forces, leading to inefficient nail insertion and user discomfort, as they convert energy into heat and noise, causing bent nails and increased tapping time.
Innovation Solution
A force-limiting and damping device comprising a body, tapping element, elastic element, and reinforcing element, where the elastic element provides a guiding and supporting effect, and the reinforcing element absorbs stress, preventing deflection and prolonging service life by managing reaction forces through delayed rebound and damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-piece design of hammer head is used, then the structure is simple and manufacturing is easy, but the hammer bounces during tapping, reducing contacting time and causing nails to bend or deflect
Solution Approach 1:
The hammer head is divided into multiple segments: a body, a tapping element movably connected to the body, and a shock-absorbing element. This segmentation allows the tapping element to move independently during impact while the shock-absorbing element manages reaction forces, preventing bounce and maintaining continuous contact with the nail.
Solution Approach 2:
The tapping element is designed to be movably connected to the body rather than fixed, allowing it to dynamically adjust during the tapping process. This dynamic structure enables the tapping element to maintain optimal contact with the nail while absorbing reaction forces, eliminating the bounce problem of rigid single-piece designs.
2Object-affected harmful factors
If a conventional industrial hammer with elastic element is used, then shock absorption is provided, but the elastic force makes the bottom of the head deflected and the connecting surface easy to be damaged
Solution Approach 1:
A shock-absorbing element is introduced as an intermediary component between the body and the tapping element. This element absorbs shock and reaction forces during tapping, protecting the connecting surface between the head and rod from damage while preventing head deflection through proper force distribution.
Solution Approach 2:
The shock-absorbing element changes its physical parameters (compression, expansion) during the tapping process to absorb reaction forces. By adjusting its elastic properties and positioning, it manages the force transmission to prevent connecting surface damage while maintaining structural integrity.
3Ease of manufacture
If the inner diameter of elastic element is larger than outer diameter of rod, then assembly is easy, but the elastic element moves relative to the rod causing head deflection and failing to provide guiding and supporting effect
Solution Approach 1:
The shock-absorbing element is designed with specific local qualities: its cross-sectional dimensions are carefully selected to provide both ease of assembly and stable positioning. The element's material properties and geometric features are optimized to prevent relative movement between components while maintaining easy assembly through reasonable clearance design.
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 device improves structural strength, reduces noise and energy loss, increases nail insertion depth by 30%, and decreases tapping frequency, providing a comfortable and efficient tapping experience by managing reaction forces effectively.
Implementation Method 1
an elastic element 93 mounted around a rod 92 at a middle of a head 91. The elastic element 93 may provide a shock-absorbing effect to the conventional industrial hammer 90
Implementation Method 2
force-limiting and damping device
Implementation Method 3
the reinforcing element 40 is mounted on the tapping element 20 between the elastic element 30 and the tapping segment 22... the reinforcing element absorbs stress, preventing deflection
Implementation Method 4
the elastic element provides a guiding and supporting effect... an inner diameter of the elastic element 93 of the conventional industrial hammer 90 is larger than an outer diameter of the rod 92
Implementation Method 5
managing reaction forces through delayed rebound and damping
Data Source
AI summary
A force-limiting and damping device has a body, a tapping element, an elastic element, and a reinforcing element. The body has a connecting segment with a mounting hole. The tapping element is movably connected to the body and has a mounting segment, a tapping segment, a fixing segment, and a protrusion segment. The protrusion segment is formed on a connecting portion between the mounting segment and the tapping segment. The reinforcing element is mounted on the tapping element between the elastic element and the tapping segment of the tapping element and abuts against the protrusion segment. The force-limiting and damping device can improve structural strength, can prolong service life, and can avoid deflection during a tapping process.