Spring-Loaded Auxiliary Handle Locking for Power Tools
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Solution Overview
Problem
Existing auxiliary handle devices for hand-held power tools lack reliable and easy-to-use mechanisms for securing the handle in place during operation, leading to potential unintentional adjustments and reduced operational stability.
Innovation Solution
An auxiliary handle device with a force-applying element, such as a spring, that maintains the locking contour engagement between the main handle body and fastening body, independent of the locking unit's position, ensuring secure attachment and preventing unintentional adjustments, combined with a locking unit featuring a locking lever for rotational fixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking unit with a locking lever is used for rotational fixing of the main handle body, then the handle can be securely fixed in position, but the device complexity increases due to additional locking mechanisms
Solution Approach 1:
The spring element automatically maintains the locking contour engagement without requiring manual intervention. The spring continuously applies force to keep the locking contours engaged, and the locking lever automatically locks or unlocks based on rotational position, eliminating the need for additional actuators or control mechanisms.
Solution Approach 2:
The patent separates the force-applying function (spring element) from the locking function (locking lever), allowing each component to be optimized independently. The spring element is extracted as a separate component that continuously applies force, while the locking lever handles only the locking/unlocking action based on rotational position.
2Reliability
If the locking mechanism continuously maintains engagement force, then unintentional adjustments are prevented, but the force-applying element requires additional design considerations to ensure consistent performance
Solution Approach 1:
The spring element continuously applies force to maintain the locking contour engagement throughout operation. This continuous force application ensures that the handle body remains securely engaged with the fastening body, preventing unintentional adjustments during use.
Solution Approach 2:
The spring element's force application is independent of the locking unit's position, meaning the spring maintains consistent engagement force whether the locking lever is in the locked or unlocked position. This parameter independence simplifies the design by decoupling the force application from the locking state.
3Adaptability or versatility
If the main handle body is made detachable for transport and different operating modes, then the device becomes more versatile, but the risk of unintentional detachment increases
Solution Approach 1:
The spring element pre-applies force to continuously push the locking contours together, creating a preliminary counter-action that prevents unintentional detachment. This continuous force opposes any forces that might cause the handle body to detach from the fastening body during transport or 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
The solution provides a reliable and easy-to-operate handle adjustment mechanism, preventing unintentional movements and enhancing operational stability, while allowing for convenient detachment and reattachment for transport or different operating modes.
Implementation Method 1
at least one force-applying element (28) which is intended to apply a force directed from the main handle body (18) in the direction of the main fastening body (14) to the main handle body (18)
Data Source
AI summary
An auxiliary handle device for a hand-held power tool includes at least one main fastening body, at least one main handle body, at least one locking unit, and at least one force-applying element. The at least one main fastening body is configured for direct arrangement on the hand-held power tool. The at least one main fastening body has at least one locking contour. The at least one main handle body is mounted rotatably relative to the at least one main fastening body in at least one operating state. The at least one main handle body has at least one handle surface and at least one locking contour configured to correspond to the at least one locking contour of the main fastening body. The locking unit has a locking element configured for releasable rotational fixing of the main handle body relative to the at least one main fastening body.