Manual Crank Operating Mechanism
- Model
- 手摇机构
- Standard
- —
- Category
- Operating Mechanism
- Documents & pricing
- Type test reports, factory inspection records and quotations are available on request; tender documents are archived by project.
Product Overview
The hand-crank operating mechanism is used together with OCS disconnectors. Opening and closing are performed manually by means of a crank handle, making it suitable for unpowered or emergency applications.
Applied Standards
The mechanical drive portion complies with GB/T 32580.2-2026, Clause 6.32 (requirements for mechanical drive systems); general requirements refer to TB/T 2073-2020 "Technical Conditions for Parts and Components of Overhead Contact System of Electrified Railway".
Technical Parameters
| Parameter | Technical Requirement |
|---|---|
| Applicable object | OCS disconnector |
| Operation mode | Hand crank (manual) |
| Use scenario | Unpowered sites, emergency operation during maintenance, and backup operation when the motorized mechanism is de-energized |
| Compatibility | Can be used together with an electric operating mechanism as an emergency manual operation means (a manual crank handle shall be provided in the motorized mechanism enclosure) |
| Open/close indication | Clear indication of the open and closed positions |
| Ambient temperature | -40℃ ~ +40℃ |
| Drive connection | The output shaft and the main drive shaft are connected by stepless adjustment; the mechanical connection is firm and reliable |
| Overload protection | An overload protection device that reliably cuts off the motor power supply shall be installed in the operating mechanism |
| Bearing housing structure | Fully sealed construction without an "oil filling hole" |
| Drive connecting parts | Universal joint bearing (with dust-proof structure) + self-lubricating bushings; pins made of anti-rust material |
| Drive linkage | Fabricated connecting structure meeting the requirements for mechanical strength, rigidity and corrosion resistance |
| Water accumulation protection | No water accumulation shall occur on any component or on the enclosure (especially at drive connections and moving parts) |
Structural Features
- Purely mechanical drive, no power supply required, high reliability
- Fully sealed bearing housing, maintenance-free without oiling
- Universal joint bearing + self-lubricating bushings for flexible operation
- No water accumulation on drive components, suitable for outdoor environments
- Simple structure, easy maintenance and interchangeable
Scope of Application
Suitable for unpowered sections, maintenance work, and emergency operation when the motorized mechanism is de-energized.
Note: Parameters of specific products such as the operating torque, the number of crank handle turns and the degree of protection are subject to the product manual.