Linear Motion Guide Binding Strip Elastic Bends
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Solution Overview
Problem
Conventional linear motion guide units with straight or curved binding strips fail to securely fasten retainer plates over long carriages, leading to instability and reduced mechanical strength, especially when the carriage is 1.5 times or more longer than conventional sizes, which is a challenge in achieving high precision and stiffness in advanced machinery.
Innovation Solution
A binding strip with regular interval bends and angled parts is used to securely fasten a retainer plate to a carriage, utilizing an elastic metal plate with V-shaped bends that deform elastically to press the retainer plate firmly against the carriage, ensuring stability and mechanical strength even in longer configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a straight or curved binding strip is used to fasten the retainer plate, then the structure is simple and easy to manufacture, but the binding strip fails to securely hold the retainer plate over long carriages (1.5 times or more longer than conventional sizes)
Solution Approach 1:
The binding strip is designed with multiple bends including a first bend at one end, a second bend at the other end, and a third bend at the midpoint. These bends create elastic deformation zones that allow the binding strip to conform to the retainer plate and carriage geometry while maintaining secure fastening over extended lengths. The curved configuration enables the binding strip to exert continuous clamping force without warping, solving the problem of inadequate fastening reliability in long carriages.
2Length of moving object
If the carriage length is increased to 1.5 times or more than conventional sizes for extended travel range, then the traveling distance is improved, but the binding strip becomes warped and fails to firmly hold down the retainer plate
Solution Approach 1:
The binding strip is segmented into multiple functional zones through strategically placed bends: end bends for securing to end caps, a midpoint bend for central support, and intermediate bends for distributed clamping. This segmentation allows each portion of the binding strip to independently manage local stresses and deformations, preventing overall warping and maintaining structural stability across the extended carriage length.
Solution Approach 2:
The binding strip utilizes elastic deformation as a key parameter change mechanism. By designing the strip with specific bend radii and angles, the material transitions from a rigid straight configuration to a flexible curved form that can accommodate the extended carriage length. The elastic properties of the binding strip material allow it to deform and conform to the longer geometry while maintaining sufficient clamping force, thus preserving structural stability despite the increased length.
3Device complexity
If a conventional binding strip is used, then the device complexity is low, but the mechanical strength and stiffness are insufficient for high precision applications
Solution Approach 1:
The multiple bends in the binding strip create elastic spring zones that enhance the mechanical strength of the fastening system. These curved sections act as energy-absorbing elements that can withstand higher loads and stresses without permanent deformation. The elastic deformation capability provided by the bends allows the binding strip to maintain secure fastening under higher mechanical loads, thereby increasing the overall mechanical strength without significantly increasing device complexity.
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 linear motion guide unit with enhanced stiffness and accuracy, capable of securely fastening retainer plates over longer carriages, maintaining mechanical strength and precision, and is adaptable to both roller and ball-type systems, suitable for miniature and high-stiffness applications.
Implementation Method 1
a binding strip constructed so as to hold securely a retainer plate which is used to keep the cylindrical rollers... The binding strip of the present is developed to make sure of holding firmly the retainer plate against the carriage even though longer than ever
Data Source
AI summary
A linear motion guide unit has a binding strip adapted to fasten a retainer plate to a carriage miniature in dimension, but long in lengthwise direction. The linear motion guide unit has a retainer plate lying lengthwise of the carriage in opposition to load-carrying race to keep more than one roller running through the load-carrying race, and a binding strip to fasten the retainer plate to the carriage. The binding strip is composed of a major part having any number of bents which are positioned at regular intervals in the longitudinal direction of binding strip, and lengthwise opposite angled parts prepared to come into engagement with the end caps, so that the binding strip urges elastically at the bents thereof the retainer to come into close engagement with carriage.