Hammer Drill Handle Mount for Interchangeable Resin and Iron Bands
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Solution Overview
Problem
Existing power tools struggle with the inability to attach both resin and iron auxiliary handles in a replaceable manner due to differences in elasticity and diameter, leading to retention issues and operational limitations.
Innovation Solution
The power tool design incorporates a handle mount with grooves and protrusions that allow for the attachment of both an arc-shaped iron band and a C-shaped resin band, utilizing adjustable diameters and fasteners to securely engage these handles, enabling interchangeable use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a handle mount with a step structure is used to retain iron bands, then iron bands are securely retained, but resin bands cannot easily move over the step and are not easily removed
Solution Approach 1:
The invention makes the retention mechanism dynamic by allowing the band to advance or recede in the axial direction. The band holder holds the two ends of the band to allow the band to advance or recede by different lengths, enabling the diameter to change dynamically. This dynamic adjustment allows both iron bands and resin bands to be attached and removed easily while maintaining secure retention.
Solution Approach 2:
The invention changes the physical parameters of the band by allowing it to advance or recede, which changes the diameter of the band. When the band advances by a smaller length at the two ends, the diameter decreases for attachment. When the band advances by a larger length, the diameter increases for removal. This parameter change enables universal compatibility with both iron and resin bands.
2Reliability
If a handle mount with a smaller diameter front area is used, then iron bands are retained with a step, but resin bands cannot easily move over the step
Solution Approach 1:
The invention makes the handle mount universal by designing it to accommodate both iron bands and resin bands. The groove extending in the axial direction on the outer circumferential surface, combined with the band holder mechanism, creates a retention structure that works with both material types. The band can be adjusted to advance or recede, changing its diameter to fit both iron and resin bands, making the handle mount multi-functional.
Solution Approach 2:
The dynamic adjustment mechanism allows the band diameter to change based on the material type. The band holder holds the two ends of the band to allow the band to advance or recede by different lengths, enabling the system to adapt to both iron bands (requiring step retention) and resin bands (requiring easy movement), thus achieving universality.
3Adaptability or versatility
If resin bands are used in existing iron band handle mounts, then attachment is possible, but retention is insufficient
Solution Approach 1:
The dynamic band adjustment mechanism provides reliable retention for resin bands by allowing precise control of the band diameter. The band holder holds the two ends of the band to allow the band to advance or recede, and the groove structure engages with protrusions to lock the band in place. This dynamic system ensures that resin bands are retained securely while maintaining adaptability.
4Ease of operation
If iron bands are used with adjustable diameter, then attachment and removal is possible, but the structure becomes more complex
Solution Approach 1:
The invention segments the band into two ends held by the band holder, allowing independent adjustment of each end. This segmentation enables the band to advance or recede by different lengths at each end, changing the diameter controllably. The segmentation simplifies the adjustment mechanism compared to completely redesigning the handle mount, making the added complexity manageable while achieving ease of operation.
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 enables the power tool to accept two different auxiliary handles in a removable and stable manner, improving user operability and flexibility by allowing selection based on the task at hand.
Implementation Method 1
When the iron band advances by a smaller length at the two ends, the diameter of the iron band can be elastically decreased to allow attachment of the iron band to the handle mount. When the iron band advances by a larger length at the two ends, the diameter of the iron band can be increased to allow removal of the iron band from the handle mount.
Implementation Method 2
a fastener configured to adjust a circumferential width of the cutout to change a diameter of the second band
Implementation Method 3
a first protrusion protruding radially inward from an inner circumferential surface of at least one of the first band or the band holder and engageable with the groove
Data Source
AI summary
A power tool can receive two different auxiliary handles in a replaceable manner. A power tool includes a tool body, a main handle, a cylindrical handle mount to which a first auxiliary handle or a second auxiliary handle is attachable and having a groove, the first auxiliary handle, and the second auxiliary handle. The first auxiliary handle includes an arc-shaped first band, a band holder that changes the diameter of the first band, and a first protrusion engageable with the groove. The second auxiliary handle includes an arc-shaped second band having a cutout in an axial direction, a fastener that changes the diameter of the second band, and a second protrusion engageable with the groove.