Electric Motor Deactivation Brake With Sealed Pot
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Solution Overview
Problem
The existing electric motor braking systems are prone to contamination, leading to reduced functionality over time due to exposure of wedge elements, spring, and bearing to external dirt, resulting in sluggish performance and potential failure.
Innovation Solution
A brake pot with closed walls is designed to encase the rotor end, protecting the braking system's components from contamination, featuring a central hub on the rotor shaft for secure guidance and a spring placement between the hub and peripheral wall, with overlapping peripheral wall and rotor end for sealing, and axial stops to limit movement and absorb transverse forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking element is exposed to external environment, then the structure is simple and easy to manufacture, but the functional elements accumulate dirt and become sluggish
Solution Approach 1:
The brake pot is designed as a closed housing with walls that enclose the braking elements (brake pads, wedge elements, spring). This shell structure protects the functional elements from external contamination while maintaining a relatively simple overall design. The closed walls act as a barrier against dirt and debris, ensuring reliable braking operation over time.
2Stability of the object's composition
If the hub extends over the entire height of the brake pot, then tilting is prevented and load-bearing capacity increases, but the device complexity increases
Solution Approach 1:
The hub is designed as a plain bearing with a cylindrical shape that fits into a corresponding cylindrical bore in the brake pot. This curved/geometric design provides stable guidance and prevents tilting of the brake pot during operation. The cylindrical geometry naturally distributes loads and maintains stability without requiring complex additional support structures.
3Object-affected harmful factors
If the peripheral wall and rotor end overlap in all positions, then sealing against contamination is achieved, but the axial movement freedom is reduced
Solution Approach 1:
The sealing is achieved through radial overlap of the peripheral wall of the brake pot with the end of the rotor, rather than through axial sealing mechanisms. This radial arrangement in a different dimension provides effective contamination protection while allowing the brake pot to move axially within the limits defined by the hub length and stop elements.
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 design ensures reliable and long-lasting brake system operation by preventing external contamination, maintaining functional integrity even after numerous operating hours, and effectively managing axial displacement and load-bearing capacity.
Implementation Method 1
A spring (18) acts with a force in the direction of the braking surface (50) on the braking element (30)
Implementation Method 2
the wedge surfaces of the wedge elements collide and build up an axial wedge force that presses the braking element more strongly onto the braking surface
Implementation Method 3
The central hub is designed in particular as a plain bearing
Data Source
Figure 1
Figure 2
AI summary
The electromotor (1) has a brake element (30) axially pressed at a braking surface (50) under action of a spring (18) during switching off of the motor. Wedge elements (37, 47) are arranged between the brake element and a rotor (3) and slide onto each other relative to the brake element during rotation of the rotor and produce an axial wedge force. The wedge force increases contact force of the braking element. The brake element is designed as a brake pot (31) that is guided with closed walls. The pot is engaged with an end (13) of the rotor, and the wedge elements lie within the closed pot.