Rear Handle Vibration Damping via Sliding and Pivoting Mounts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Power tools, such as hammer drills, generate significant vibrations during operation, which are transferred to the rear handle and can cause discomfort and injury to the operator, especially during prolonged use.
Innovation Solution
A moveable rear handle with dual mounting assemblies, comprising a helical spring and bellows, is designed to absorb and dampen vibrations by allowing axial and pivoting movements, reducing the transfer of vibrations from the tool's body to the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the rear handle is rigidly mounted to the body, then structural stability is improved, but vibration transfer to the operator increases
Solution Approach 1:
The rear handle is made moveably mounted on the body through upper and lower mounting assemblies that enable relative movement. The upper mounting assembly allows sliding movement while the lower mounting assembly allows pivoting movement, transforming the rigid static connection into a dynamic flexible connection that can adapt to vibrations.
Solution Approach 2:
Vibration dampening mechanisms are introduced as intermediary elements between the body and the rear handle. These mechanisms include damping elements in the upper mounting assembly and damping elements in the lower mounting assembly that actively reduce vibration transmission while maintaining structural connection.
2Object-affected harmful factors
If vibration dampening mechanisms are added to reduce vibration transfer, then operator comfort is improved, but device complexity increases
Solution Approach 1:
The vibration dampening system is segmented into two separate mounting assemblies: an upper mounting assembly and a lower mounting assembly. Each assembly contains its own damping mechanisms and handles specific movement types (sliding and pivoting respectively), distributing the complexity across modular components rather than a single complex system.
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 solution effectively minimizes the transmission of vibrations to the operator's hand, reducing discomfort and the risk of injury by utilizing a combination of sliding and pivoting mechanisms within the handle's mounting assemblies to absorb and dissipate operational vibrations.
Implementation Method 1
a first vibration dampening mechanism (60) comprising a helical spring
Implementation Method 2
a second vibration dampening mechanism (90) comprising a bellows
Implementation Method 3
The pin is locatable in the oval slot... allowing the lower end to pivot about a horizontal axis
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A power tool, for example a hammer drill comprising: a housing (2); a handle (24) having two ends, the first end (30) being moveably mounted to the housing (20) via a first mounting assembly (34), the second end (32) being moveably mounted to the housing (2) via a second mounting assembly (36); a biasing mechanism (60) connected between the housing (2) and the handle (24); wherein at least one of the mounting assemblies (36, 34) comprises: a first part mounted on the body (2) and a second part mounted on the one end (32) of the handle (24), one part comprising a support (74), the other part comprising a pin (70) located in the support (74) which is capable of being rotated in the support (74) to enable the end (32) of the handle (24) to rotate relative to the housing (2) and to move linearly in the support (74) to enable the end (32) of the handle (24) to move linearly relative to the housing (2); characterized in that the support (74) comprises a passage (76) in which the pin (70) is located, the pin (70) being capable of freely moving within the passage (76) either rotationally to enable the end (32) of the handle to rotate relative to the housing (2) or linearly to enable the end (32) of the handle to move linearly relative to the housing (2); wherein the biasing mechanism (60) biases the pin (70) to a predetermined position within the passage (76).