Handle Device with Independent Clamping and Axial Locking
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Solution Overview
Problem
Existing handle devices for hand-held power tools are uncomfortable to use due to the need for simultaneous actuation of clamping and axial locking mechanisms, which complicates the attachment and detachment process.
Innovation Solution
A handle device with separate clamping and form-locking actuation handles allows independent adjustment of the clamping ring between clamping and release positions, and the axial form-locking body can be actuated independently of the clamping mechanism, using a form-locking actuating handle to engage or disengage with the power tool's form-locking contour.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the clamping receptacle and axial form-locking contour are coupled together, then the attachment and detachment process is simplified, but the user comfort and ease of use deteriorate due to the need for simultaneous actuation of both mechanisms
Solution Approach 1:
The handle device is segmented into two independent actuation systems: a clamping actuating handle (78) that rotates the clamping ring (41) to adjust the clamping receptacle (42) between clamping and release positions, and a form-locking actuating handle (90) that independently actuates the axial form-locking body (80) between engaged and released positions. This segmentation allows each mechanism to be operated separately, improving user comfort while maintaining a relatively simple overall attachment process.
2Device complexity
If a single actuating handle is used for both clamping and form-locking, then the device structure is simplified, but the ease of operation deteriorates due to the complicated actuation sequence
Solution Approach 1:
Instead of using a single actuating handle that would require complex multi-stage actuation sequences, the invention divides the actuation function into two separate handles: the clamping actuating handle (78) with gripping portion (71) for operating the clamping mechanism, and the form-locking actuating handle (90) with gripping surface (92) for operating the axial form-locking body. This segmentation simplifies the actuation sequence to independent, straightforward operations.
Solution Approach 2:
The clamping ring (41) acts as an intermediary element that connects the clamping receptacle (42) to the axial form-locking body (80) through the clamping axis (SP). This intermediary structure allows the two independent actuation handles to operate their respective mechanisms without direct mechanical coupling, maintaining structural simplicity while enabling independent operation.
3Device complexity
If the axial form-locking body is integrated with the clamping ring, then the device structure is simplified, but the ease of operation deteriorates due to the inability to independently adjust the locking mechanism
Solution Approach 1:
The axial form-locking body (80) is segmented from the clamping ring (41) and mounted displaceably on the clamping ring through the clamping axis (SP). This segmentation is facilitated by the tensioning anchor (66) which penetrates both components, allowing the axial form-locking body to be independently actuated by the form-locking actuating handle (90) without being mechanically coupled to the clamping actuation mechanism.
Solution Approach 2:
The axial form-locking body (80) is designed with dynamic displacement capability along the clamping axis (SP), allowing it to move between engaged and released positions independently of the clamping ring's rotational position. This dynamic independence is achieved through the displaceable mounting arrangement and the separate actuation mechanism, enabling flexible and independent adjustment of the locking function.
Data Source
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AI summary
The invention relates to a handle device (40) for releasable fastening on a hand-held power tool (10), wherein the handle device has a clamping ring (41) with a clamping mount (42) for receiving a fastening portion (20) of the hand-held power tool (10) and also has a handle (60), which projects from the clamping ring (41), wherein a clamping-actuation grip (78), which can be activated manually by the operator (BE), can be used to adjust the clamping mount (42) between a clamping position (K), in which the fastening portion of the hand-held power tool (10) is clamped and in which an inner circumferential surface (43) of the clamping mount (42) lies against the fastening portion of the hand-held power tool (10)with a clamping fit, and a release position (L), in which the fastening portion of the hand-held power tools (10) is freed and in which the fastening portion of the hand-held power tool (10) can be inserted into the clamping mount (42) along an insertion axis (S), and wherein the handle device has an axial-form-fitting body (80), which is mounted in a movable manner in relation to the clamping mount (42) and has an axial-form-fitting contour (81) for engagement in a mating axial-form-fitting contour (25) of the fastening portion of the hand-held power tool. Provision is made for the handle device to have a form-fitting-actuation grip (90), which is separate from the clamping-actuation grip (78), can be activated manually by the operator (BE), independently of the clamping-actuation grip, and is intended for adjusting the axial-form-fitting body (80) between an engagement position, in which the axial-form-fitting contour (81) is in engagement with the mating axial-form-fitting contour (25), and a freeing position, in which the axial-form-fitting contour is disengaged from the mating axial-form-fitting contour.