Detachable Polymeric Linear Drive Rail for Pitch Error and Noise
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Solution Overview
Problem
Existing linear drives suffer from manufacturing tolerances leading to pitch errors between drive elements, causing interference, high gear wear, and significant noise generation, with static drive belts being difficult to replace, increasing maintenance costs and downtime.
Innovation Solution
A linear drive design featuring a first drive element with a polymeric base body and teeth, connected to a bracket via a detachable connection (U-bolt or hook-and-loop fastener), allowing easy replacement of worn components, and using polymeric materials to dampen vibrations and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rigid metallic drive elements with precise gearing are used, then manufacturing precision is improved, but gear wear and noise generation increase due to pitch errors
Solution Approach 1:
The patent changes the material parameter from rigid metal to elastic polymer, and changes the contact mechanism from sliding friction to elastic deformation. The polymer's ability to elastically deform allows it to accommodate pitch errors without generating high contact stresses, thereby reducing wear and noise while maintaining manufacturing precision.
Solution Approach 2:
The patent employs composite material structure consisting of polymer base material combined with reinforcing fibers or fillers. This composite approach provides both the elasticity needed to compensate for pitch errors and sufficient mechanical strength to transmit drive forces, resolving the contradiction between precision and wear resistance.
2Stability of the object's composition
If static drive belts are permanently fixed to rails, then structural stability is improved, but ease of repair deteriorates as replacement requires replacing the entire rail assembly
Solution Approach 1:
The patent divides the drive system into separable modules: the rail structure, the drive belt, and the mounting connection. By making the connection detachable through separate mounting brackets and fastening mechanisms, the drive belt becomes an independent replaceable component while the rail remains stable and reusable, resolving the contradiction between structural stability and ease of repair.
3Ease of repair
If detachable connections are used between base body and holder, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The mounting bracket serves multiple functions: it provides structural support, enables detachable connection through standardized fastening interfaces, and allows for easy replacement of the base body. This multi-functional design achieves ease of repair without significantly increasing overall device complexity, as the same bracket structure serves both structural and mounting purposes.
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 design effectively compensates for pitch errors, reduces noise, and facilitates easy maintenance by allowing component replacement without replacing the entire system, thus minimizing wear and downtime.
Implementation Method 1
the base body and the teeth are made of a polymeric material which dampens vibrations and reduces noise
Data Source
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AI summary
The invention relates to a linear drive comprising at least one first drive element (2) having a first end (3) and a second end (4) in a longitudinal direction (L), wherein the first drive element (2) has a main body (5) with a rear side and with a drive side opposite same in a vertical direction and having a plurality of teeth (6), wherein the teeth (6) are aligned over a width (B) of the first drive element (2), wherein the teeth (6) are spaced apart from one another in a tooth distribution (T) in the longitudinal direction (L), wherein the first drive element (2) has a holder (8) on which the main body (5) of the first drive element (2) is arranged with its rear side. The linear drive has at least one second driveable drive element (16) having teeth (6), wherein at least one tooth (6) of the second drive element (16) engages in at least one tooth gap (11) of the first drive element (2), whereby the second drive element (16) can be rolled on the first drive element (2). The first drive element (2) can be non-destructively removed from the holder (8).