INDUSTRY COMPONENT

Flexible Cup Wall

Flexible cup wall is the elastic deformation element in harmonic drive systems that enables precise motion transmission through controlled flexing.

View Specifications

Component Specifications

Definition
The flexible cup wall is a critical component of the flexspline in harmonic drive mechanisms, consisting of a thin-walled cylindrical structure with gear teeth on its outer periphery. It undergoes controlled elastic deformation when engaged with the wave generator, creating elliptical deflection that enables high-ratio speed reduction and torque multiplication through meshing with the circular spline.
Working Principle
Operates on strain wave gearing principle where the flexible cup wall deforms elliptically under pressure from the wave generator, causing its external teeth to engage progressively with the internal teeth of the circular spline, resulting in precise rotational motion transmission with high reduction ratios.
Materials
High-strength alloy steel (typically 40CrNiMoA or similar), heat-treated to HRC 50-55, with surface hardening for wear resistance. Alternative materials include maraging steel or titanium alloys for specialized applications.
Technical Parameters
  • Backlash <1 arc-minute
  • Tooth Module 0.2-1.0 mm
  • Wall Thickness 0.5-2.0 mm
  • Torque Capacity 5-5000 Nm
  • Positioning Accuracy <1 arc-minute
  • Operating Temperature -40°C to +120°C
  • Reduction Ratio Range 50:1 to 320:1
Standards
ISO 1328-1, DIN 3960, JIS B 1702

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flexible Cup Wall.

flexible cup wall flexspline harmonic drive strain wave gear precision gear motion control robotics component zero backlash gear Flexible Cup Wall in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Flexspline

A thin-walled, flexible cup-shaped component in a harmonic drive that deforms elastically to transmit torque through wave generator engagement.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Fatigue failure from cyclic stress
  • Tooth wear from improper lubrication
  • Overload deformation beyond elastic limit
  • Thermal expansion mismatch
  • Corrosion in harsh environments
FMEA Triads
Trigger: Excessive cyclic loading beyond design limits
Failure: Fatigue crack propagation leading to wall rupture
Mitigation: Implement torque limiters, regular non-destructive testing, and proper load calculation during design
Trigger: Inadequate or contaminated lubrication
Failure: Accelerated tooth wear and increased backlash
Mitigation: Use specified lubricants, establish maintenance schedules, and install contamination seals
Trigger: Misalignment during assembly
Failure: Uneven tooth contact and premature failure
Mitigation: Use precision alignment tools, implement assembly procedures, and conduct run-in tests

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Tooth profile tolerance: IT4-IT5, Wall thickness variation: ±0.02 mm, Concentricity: 0.01 mm TIR
Test Method
Coordinate measuring machine (CMM) verification, Finite element analysis (FEA) for stress distribution, Dynamic fatigue testing per ISO 6336, Backlash measurement with precision encoders

Buyer Feedback

★★★★☆ 4.6 / 5.0 (18 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Flexible Cup Wall meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Flexible Cup Wall arrived with full certification."

"Great transparency on the Flexible Cup Wall components. Essential for our Machinery and Equipment Manufacturing supply chain."

Related Components

Inspection Frame
Structural support component in automated fabric inspection systems that holds cameras, sensors, and lighting for defect detection.
Machine Frame
The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.
pH Sensor Assembly
Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications
Load Cell Assembly
Precision load cell assembly for automated powder dispensing systems

Frequently Asked Questions

What is the primary function of the flexible cup wall?

The flexible cup wall converts elliptical deformation into rotational motion through controlled flexing, enabling high-ratio speed reduction and torque multiplication in harmonic drive systems.

How does wall thickness affect performance?

Thinner walls increase flexibility and reduction ratio but reduce torque capacity, while thicker walls enhance durability and torque transmission at the expense of flexibility and reduction range.

What maintenance is required for flexible cup walls?

Regular lubrication with specified grease, periodic inspection for fatigue cracks, and monitoring of backlash increase. No routine adjustment is needed due to preloaded design.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Flexible Cup Wall

Flexible Connectors Flexible Element