Offset Linear Guide Layout for Rotary Hammer Vibration Control
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Solution Overview
Problem
Existing machine tools face issues with deformation and increased friction in the side-grip mounting area due to significant forces during operation, which can interfere with the function of the linear guide and cause vibrations.
Innovation Solution
The linear guide is positioned at a distance from the side-handle mounting area, with a spatial separation ensuring that these forces do not affect the guide, and additional components like a stiffening sleeve and wiper lip are used to enhance stability and reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the linear guide is positioned close to the side-handle mounting area, then the design complexity is reduced, but significant forces during operation cause deformation and increased friction in the mounting area
Solution Approach 1:
The patent divides the housing structure into functionally separated zones: the side-handle mounting area is spatially separated from the linear guide area along the longitudinal axis. This segmentation allows each area to be optimized independently - the side-handle area can withstand high forces without affecting the linear guide's low-friction operation.
Solution Approach 2:
The patent resolves the spatial conflict by utilizing the longitudinal dimension (Z-axis) to separate the side-handle mounting area from the linear guide area. Instead of competing for the same longitudinal position, the side handle is mounted in a rear portion while the linear guide operates in a forward portion, creating clear functional separation along the tool's length.
2Stability of the object's composition
If the tension band is tightened in the side-handle mounting area, then the side handle stability is improved, but deformation of encircled elements occurs and interferes with linear guide function
Solution Approach 1:
The patent extracts the linear guide from the high-stress zone by positioning it in a different longitudinal region from the side-handle mounting area. This removal of the linear guide from the deformation-prone area ensures that tightening forces in the side handle do not interfere with the guide's precise operation.
Solution Approach 2:
The patent introduces a structural intermediary - the housing wall thickness and material structure between the side-handle mounting area and the linear guide area - that acts as a force isolation barrier. This intermediary prevents stress transmission from the tension band to the linear guide, maintaining both side handle stability and guide reliability.
3Length of moving object
If the linear guide is positioned in the side-handle mounting area, then the overall device length is reduced, but vibration increases due to force interference
Solution Approach 1:
The patent segments the housing into distinct functional zones along the longitudinal axis, with the side-handle mounting area separated from the linear guide area. This spatial segmentation prevents vibration transmission from the high-force side handle region to the precision linear guide region, reducing overall device vibration.
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 design reduces friction and vibration, improving the operating characteristics and maintaining the functionality of the linear guide with minimal design complexity.
Implementation Method 1
The linear guide is arranged at a distance in the longitudinal direction from the side handle mounting area... It counteracts an increase in friction on the linear guide
Implementation Method 2
the linear guide has an annular wiper lip arranged on the housing, which bears at least indirectly, and optionally directly, against the sliding sleeve
Data Source
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AI summary
Machine tool (1), in particular a rotary hammer or chisel hammer, comprising a housing (5) having a rear handle area (7), an assembly (9) comprising a percussion mechanism (11) and a drive unit (13), wherein the assembly (9) is at least partially arranged within the housing (5) and is movably arranged relative to the housing (5), wherein the percussion mechanism (11) has a percussion axis (19) defining a longitudinal direction (Z), and a linear guide (61) with which the assembly (9) is slidably mounted on the housing (5) in the longitudinal direction (Z), wherein the housing (5) has a side handle mounting area (62) which can be enclosed by the tension band of a side handle, wherein the percussion axis (19) passes through the side handle mounting area (62), and wherein the linear guide (61) is arranged at a distance in the longitudinal direction (Z) from the side handle mounting area (62).