Wedge Brake Module for Linear Movers on Vertical Tracks
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Solution Overview
Problem
Traditional linear drive transport systems lack effective brake systems to prevent movers and loads from unintended movement, particularly on vertical tracks, leading to potential damage when the system is powered down.
Innovation Solution
A brake system for linear motor systems that includes a housing with tapered brake pads and an actuator to engage a brake flag, using a wedge mechanism to secure the pads in place, ensuring the movers remain stationary even when power is lost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional linear drive transport systems are used without brake systems, then the system structure remains simple and cost-effective, but movers and loads may experience unintended movement and potential damage on vertical tracks when the system is powered down
Solution Approach 1:
The brake system is implemented as a separate, extractable module that can be selectively applied to specific track sections where needed (particularly vertical sections), rather than requiring a complex integrated brake system throughout the entire linear drive transport system. This allows the brake function to be taken out as an independent component that addresses the reliability issue without unnecessarily complicating the overall system structure.
Solution Approach 2:
The brake pads are positioned and configured in advance within the housing structure, with spring elements pre-loaded to provide immediate braking force when the mover enters the braking zone. This preliminary arrangement ensures that when power is lost or the system needs to stop, the brake mechanism is already in position and ready to engage, preventing unintended movement without requiring complex real-time control systems.
2Reliability
If brake pads are made with tapered surfaces for better engagement, then the braking effectiveness and stability improve, but the manufacturing precision requirements increase
Solution Approach 1:
The brake pads utilize tapered surfaces with specific angle parameters that optimize the mechanical advantage and engagement stability. By carefully selecting and standardizing these taper angles, the system achieves reliable braking performance while maintaining manufacturability. The spring elements work in conjunction with these tapered surfaces to provide consistent force, compensating for minor variations in manufacturing precision.
Solution Approach 2:
The brake pads are made from homogeneous friction materials with consistent properties throughout, ensuring uniform contact and engagement with the mover. This homogeneity in material composition and surface properties helps maintain stable braking performance even when manufacturing tolerances vary slightly, reducing the need for extremely high precision manufacturing.
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 brake system effectively restricts movement of movers along the track, preventing damage from unintended falls and ensuring safety and stability, especially on vertical sections.
Implementation Method 1
a wedge disposed within the housing and comprising a third tapered surface configured to interface with the first tapered surface of the first brake pad and a fourth tapered surface configured to interface with the second tapered surface of the second brake pad
Implementation Method 2
a first brake pad disposed within the housing and comprising a first tapered surface, wherein the first brake pad is configured to move between a first position and a second position
Data Source
AI summary
The present disclosure describes a brake system for a track section of a linear motor system. The brake system includes a housing receiving a brake flag of a mover and a first brake pad disposed within the housing and having a first tapered surface. The brake system also includes a second brake pad disposed within the housing and having a second tapered surface and a wedge disposed within the housing and comprising a third tapered surface. The brake system also includes an actuator that moves the wedge, wherein movement of the activation wedge causes the first brake pad to move and causes the second brake pad to move.