Impact Tool Vibration Proofing via Dual-Body Reciprocation
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Solution Overview
Problem
Existing impact tools experience significant vibration along the striking axis during operation, which cannot be fully mitigated by existing mechanisms, necessitating further vibration-proofing improvements.
Innovation Solution
The impact tool incorporates a dual-body structure with a biasing member and a vibration-proofing mechanism that includes a long-distance and short-distance moving region, where the first and second body elements reciprocate to absorb and reduce vibration, with the biasing member's direction aligned with the striking axis to enhance vibration absorption and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single elastic member connects the transmission housing and housing to reduce vibration, then some vibration reduction is achieved, but insufficient vibration proofing remains during actual hammering operation
Solution Approach 1:
The patent divides the vibration reduction function into multiple independent elastic members (first and second elastic members) positioned at different locations. Each elastic member handles specific vibration components, collectively providing comprehensive vibration proofing that overcomes the limitation of single-member designs.
Solution Approach 2:
The patent combines multiple elastic members working together in parallel to achieve synergistic vibration reduction. The first elastic member (main spring) and second elastic member (auxiliary spring) are integrated into a unified vibration reduction system that addresses both primary and secondary vibration sources simultaneously.
2Object-affected harmful factors
If elastic members are added to improve vibration proofing, then vibration reduction is enhanced, but device complexity increases
Solution Approach 1:
The elastic members serve multiple functions: they provide vibration reduction, support the transmission housing, and accommodate relative movements between housing components. This multi-functionality reduces the need for separate dedicated vibration isolation components, thereby limiting complexity increase.
Solution Approach 2:
The patent employs elastic members that dynamically adapt to varying vibration conditions during hammering operation. The springs automatically adjust their stiffness and damping characteristics based on the operational load, providing optimal vibration proofing across different working conditions without requiring complex active control systems.
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 reduces vibration transmission to the user, enhances operational stability, and prevents damage from collisions between body elements, while also providing a dust-proofing mechanism to prevent dust ingress.
Implementation Method 1
the body has a first body element, a second body element and a biasing member that biases the first and second body elements
Implementation Method 2
The biasing member can be formed by a spring element such as a coil spring. When using a coil spring as the biasing member, one end of the coil spring is fixed to the first body element and the other end is fixed to the second body element
Implementation Method 3
a striking mechanism that is driven by output of the driving motor... consisting of a piston that is caused to linearly reciprocate by the driving motor, a striking element, and an air chamber that is formed between the piston and the striking element. When the piston is moved toward the tool accessory, air within the air chamber is compressed. When the compressed air expands, the striking element is moved
Implementation Method 4
the first and second body elements are configured to rotate around a rotation axis with respect to each other... a vibration-proofing mechanism that causes the first and second body elements to reciprocate away from and toward each other when vibration is caused by driving of the striking mechanism
Data Source
AI summary
It is an object of the invention to provide rational structure for vibration proofing in hammering operation. A driving motor 110 and a striking mechanism 140 are provided in a first body element 101a, and a handle 109 and a battery mounting part 160 are provided in a second body element 101b. The first and second body elements 101a, 101b are moved with respect to each other via a biasing member 181 when vibration is caused by driving of the striking mechanism 140. Further, a first region 100a close to the striking mechanism 140 forms a long-distance moving region 200 in which the first and second body elements 101a, 101b move a longer distance in a longitudinal direction than in the second region 100b less close to the striking mechanism 140.