Gripping Device Jaw Guide With Needle Bearing Rollers
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Solution Overview
Problem
Existing gripping or clamping devices are not optimized for compactness and suffer from transverse forces, leading to inefficiencies in design and increased wear due to impulse-like forces during operation.
Innovation Solution
The design incorporates needle bearing rollers for jaw support, a central pinion with synchronous movement, and damping elements between the jaw base body and toothed rack section to reduce wear and compactness, along with a protective element and roller guides for efficient force dissipation and smooth movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional gripping device designs are used, then the device can perform gripping or clamping functions, but the device size is large and not compact
Solution Approach 1:
The needle bearing rollers serve dual functions: they support the jaws during movement and provide mutual support between opposing jaws through force dissipation. This merging of support functions into a single component reduces the number of separate parts needed, achieving a more compact device structure while maintaining functional complexity
Solution Approach 2:
The needle bearing rollers are arranged with their axes perpendicular to the pinion axis, creating a three-dimensional force dissipation path. This spatial arrangement allows forces to be distributed in multiple directions within a compact volume, reducing the overall device size while maintaining structural integrity
2Reliability
If conventional jaw support mechanisms are used, then jaws can be supported during movement, but transverse forces increase leading to higher wear
Solution Approach 1:
The needle bearing rollers are positioned to receive and utilize the transverse forces that naturally occur during jaw movement. Instead of these forces causing wear and damage, they are channeled through the needle rollers which are specifically oriented to handle transverse loading, converting potentially harmful forces into useful support forces that stabilize jaw movement and reduce wear on other components
3Volume of moving object
If the jaws are moved without mutual support, then the gripping function can be performed, but the device cannot achieve compact design due to force dissipation requirements
Solution Approach 1:
The needle bearing rollers act as intermediary elements between opposing jaws, providing a controlled path for force dissipation. When jaws move towards or away from each other, forces are transmitted through the needle rollers which mediate the interaction, allowing compact arrangement while properly managing force flows. The rollers transfer forces between jaws in a controlled manner that enables space-efficient design
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 configuration achieves a compact design with reduced transverse forces, lower wear due to damping of impulse-like forces, and effective force transmission, enabling precise and durable operation.
Implementation Method 1
the jaws support each other via the needle bearing rollers
Implementation Method 2
a smooth movement between the jaws and the base part is possible
Implementation Method 3
a damping element permitting elastic resilience being provided between the jawed base body and the respective toothed rack section
Implementation Method 4
Force impulses that occur are dampened due to the relative movement between the jaw base body and the rack section and due to the provision of the damping element
Implementation Method 5
roller guides and preferably cross roller guides are provided between the guide surface sections and the counter-guide surfaces
Implementation Method 6
On the one hand, forces can be transmitted well via these roller guides
Implementation Method 7
the pinion being arranged centrally between the jaws... the jaw comprises a jaw base body and a toothed rack section which interacts with the respective pinion
Implementation Method 8
In order to transfer the rotational movement of the pinion into a longitudinal movement of the respective jaw
Data Source
Figure 1~2b
Figure 3~4
AI summary
The invention relates to a gripping or tensioning device (10) for gripping or tensioning articles, comprising an electric drive (20), said drive (2) driving a pinion (28) mounted on an output shaft (26), jaws (12, 14) which are coupled for movement with the pinion (28) and can be displaced along a base (18) by means of a jaw guide (80), said jaw guide (80) having bearing rollers (42) in the region between the jaws (12, 14) in such a manner that the rotational axes of the bearing rollers run parallel to the pinion rotational axis (84).