Hydrostatic Bearing Braking Device for Power Cut Safety
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Solution Overview
Problem
High-precision machine tools with hydrostatic bearing modules face damage and precision loss due to continuous operation during power cuts, posing safety risks to operators and reducing machine tool accuracy.
Innovation Solution
A braking device comprising a base, braking component, and driving component with a clamping block system that shifts to a braking position when hydraulic pressure is reduced, using a reset member to engage the clamping block and stop the machine tool's working platform, thereby preventing continuous operation during power outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a hydrostatic bearing module is used to support a heavy working platform, then the machine tool can maintain high precision during normal operation, but when power is cut the working platform continues to rotate due to inertia, causing damage to precise transmission elements and reducing manufacturing precision
Solution Approach 1:
The braking device is pre-configured with a reset member (spring) that stores potential energy during normal operation when hydraulic pressure pushes the piston against it. When power is cut and hydraulic pressure drops, this pre-stored energy automatically activates the braking mechanism by pushing the piston to engage the clamping block with the brake wheel, counteracting the inertial rotation before damage can occur.
Solution Approach 2:
The system performs preliminary action by maintaining hydraulic pressure during normal operation to keep the clamping block retracted from the brake wheel, allowing smooth rotation. The reset member is pre-positioned and charged with energy during this normal operation, ready to immediately activate braking when power is cut, rather than waiting for the emergency to occur.
2Ease of operation
If hydraulic pressure is applied to keep the clamping block away from the brake wheel during normal operation, then the working platform can rotate smoothly, but when power is cut the hydraulic pressure drops and the clamping block automatically engages to stop rotation
Solution Approach 1:
The braking system operates on an inverted logic: during normal operation, hydraulic pressure actively keeps the brake disengaged for smooth rotation. When power is cut and hydraulic pressure is lost, the system automatically engages braking not as a failure mode but as the intended emergency response. The reset member (spring) is pre-compressed during normal operation, storing energy that is released when hydraulic pressure drops, turning energy loss into a triggering mechanism for safe braking.
3Reliability
If the clamping block continuously contacts the brake wheel, then the working platform stops rotation, but this would prevent smooth operation and increase friction during normal use
Solution Approach 1:
The braking system dynamically adjusts the contact between the clamping block and brake wheel based on operational conditions. During normal operation, hydraulic pressure dynamically maintains the clamping block in a retracted position, eliminating friction and enabling smooth rotation. When power is cut, the system dynamically transitions to braking mode as the hydraulic pressure drops and the reset member pushes the piston to engage the clamping block with the brake wheel, applying friction force only when needed for safety.
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 braking device effectively stops the machine tool's working platform during power cuts, prolonging the service life of hydrostatic bearings, enhancing operator safety, and maintaining precision by preventing continuous operation and subsequent damage.
Implementation Method 1
a reset member disposed in the chamber, two opposite ends of the reset member respectively butt the piston and an inner wall of the chamber; when the piston butts the reset member under an external force, the first butting portion of the driving member and the second butting portion of the movable member are kept away from each other
Implementation Method 2
The external force generated by a hydraulic pressure is reduced in case of power cut, so that the reset member butts the piston, and the first butting portion and the second butting portion move close to each other
Implementation Method 3
the first clamping block shifts from the first starting position to a first braking position along the first axis towards a direction away from the second axis
Data Source
AI summary
A braking device includes a base, a braking component, and a driving component including a reset member. The braking component has a clamping block. The driving component includes a movable member, a chamber therein and a first butting portion. The movable member passes through the driving member. One end of the movable member has a piston accommodated in the chamber, and the other end of the movable member has a second butting portion. The reset member is disposed in the chamber. The piston butts the reset member under an external force, and the first butting portion and the second butting portion are kept away from each other, and when the external force vanishes, the reset member butts the piston, and the first butting portion and the second butting portion are kept close to each other so as to achieve a braking effect.