Orbital Sander Handle Angle and Dust Extraction
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Solution Overview
Problem
Existing orbital sanders face challenges in providing efficient and ergonomic design, particularly in terms of handle angle, dust extraction, and vibration reduction, which affect user comfort and operational efficiency.
Innovation Solution
The orbital sander features a handle extending at an oblique angle greater than 90 degrees, a dust extraction port directly connected to the sanding pad, and a torque absorber mechanism to restrict movement to orbital motion, enhancing user comfort and reducing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle extends at a conventional angle (less than or equal to 90 degrees), then the device structure is simpler, but user ergonomics and ground clearance are reduced
Solution Approach 1:
The handle extends from the housing at an oblique angle greater than 90 degrees relative to the rotational axis, creating an asymmetric configuration that improves user ergonomics and increases ground clearance between the sanding pad and work surface
2Object-affected harmful factors
If dust extraction is not directly connected to the sanding pad, then the device structure is simpler, but dust dispersion and user comfort are reduced
Solution Approach 1:
A dust extraction port is directly connected to the sanding pad, extracting dust at its source and directing it away from the user through the port, thereby reducing dust dispersion and improving user comfort
3Object-generated harmful factors
If the carrier is not restricted to orbital motion, then the mechanism is simpler, but vibration and operational efficiency are increased
Solution Approach 1:
A torque absorber mechanism is introduced as an intermediary between the drive shaft and the carrier, restricting the carrier's movement to controlled orbital motion about the rotational axis, thereby reducing vibration and improving operational efficiency
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 design improves user ergonomics, increases ground clearance, and effectively reduces vibration and dust dispersion, allowing for more efficient and comfortable sanding operations.
Implementation Method 1
a drive shaft configured to receive torque from the electric motor for rotating the drive shaft about the rotational axis, the drive shaft having an eccentric portion configured to orbit about the rotational axis
Implementation Method 2
a torque absorber having a first end secured to the housing by first and second clamps corresponding, respectively, to the first and second clamshell portions of the housing, and a second end secured to the carrier, the torque absorber configured to restrict movement of the carrier to orbital motion about the rotational axis
Data Source
AI summary
An orbital sander (10) comprises a housing (14) and a drive unit (50) in the housing (14). The drive unit (50) includes an electric motor (58) and a drive shaft (68). The electric motor (58) has a motor output shaft defining a rotational axis (62). The drive shaft (68) is coupled for co-rotation with the motor output shaft about the rotational axis (62). The drive shaft (68) has an eccentric portion (70) configured to orbit about the rotational axis (62). A sanding pad (100) is coupled to the eccentric portion (70). A handle (16) extends from the housing (14) at an oblique angle greater than 90 degrees relative to the rotational axis (62). A battery pack (26) is coupled to the handle (16) for providing power to the electric motor (58). The orbital sander (10) is convenient for users to grasp.