Decision inputs
- Rated current and short-time peak
- Contact force window
- Temperature rise and electrical life
- Miniaturization limits
APPLICATION SOLUTION
Electronics & appliance contact preload
Relays, contactors and connectors use Belleville spring washers for stable contact pressure and thermal compensation; this entry page lists contact preload decision points and verification methods.
ENGINEERING PROBLEM
Insufficient or unstable contact pressure raises contact resistance, temperature rise and arcing damage.
BOUNDARY
This page describes a decision pattern and does not promise size or performance for another operating condition.
Solution pattern
- Belleville washers give high stiffness, short travel constant force
- Fine-tune force-travel via stacking
- Verify retention against temperature rise
Key risks
- Contact wear and welding shift the force point
- High-temperature relaxation
- Vibration opening
Verification plan
- Contact resistance and temperature rise tests
- Electrical endurance testing
- Contact checks after vibration and shock
Source-backed correspondences
| Summary | Load | Travel | Source |
|---|---|---|---|
| 电子/家电预紧——按preload目标预选产品族；场景摘要仅供决策参考，不构成对其他工况的产品承诺。 | 按装配压紧目标 | 补偿行程 | Source ↗ |
Evidence (library locators)
Every technical claim traces to a specific asset version and page; restricted sources show locator metadata only.
- 400 CN1288805C 电插接连接器 射频同轴插接 盘形弹簧作弹性接触元件 PDF p.5 (OCR) · mechanism(internal source; excerpt not public)
- 397 US2771591 Electrical connector with Belleville spring washers 铝导线爪式接线夹 PDF p.2 · mechanism(internal source; excerpt not public)
- 398 US9437952B2 Connector assembly having self adjusting male and female c PDF p.7 · mechanism(internal source; excerpt not public)
- 399 US4033660 High current electrical joint apparatus 大电流电连接 碟簧堆叠定压夹紧 PDF p.7 · mechanism(internal source; excerpt not public)
- 398 US9437952B2 Connector assembly having self adjusting male and female c PDF p.1 · numeric(internal source; excerpt not public)
- 398 US9437952B2 Connector assembly having self adjusting male and female c PDF p.6 · numeric(internal source; excerpt not public)
- US10829882 WashingMachine Planetary Transmission Belleville Spring PDF p.1 (OCR) · numeric(internal source; excerpt not public)
Cases illustrate decisions and do not constitute a specification promise for any other operating condition.
ENGINEERING REVIEW