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Tangmo
A Quick Change Device (also known as a quick coupler, quick-disconnect coupling, or automatic tool changer) is a mechanical interface that enables rapid, tool-less connection and disconnection between two components—typically a power source (prime mover) and an interchangeable tool, attachment, or hydraulic/electrical line.
Unlike traditional bolted or threaded connections that require wrenches and significant downtime, quick change devices use latching mechanisms, bayonet fittings, or automatic locking systems to achieve secure attachment in seconds. They are widely used in construction equipment (excavator attachments), industrial automation (robotic end-of-arm tooling), fluid power systems (hydraulic/pneumatic lines), and machine tools (spindle tool changers).
Quick change devices generally consist of two mating halves:
| Component | Description |
|---|---|
| Master / Base / Female half | Permanently attached to the driving machine (excavator arm, robot wrist, hydraulic hose end) |
| Tool / Adapter / Male half | Permanently attached to the interchangeable tool (bucket, gripper, hydraulic cylinder) |
Connection sequence:
The operator (or automation system) aligns the two halves
The male half is inserted into the female half
A locking mechanism (spring-loaded pins, hydraulic wedges, ball detents, or threaded collar) engages automatically or via manual actuation
For multi-line systems, fluid ports and electrical contacts align and seal simultaneously
Upon disconnection, automatic shut-off valves in hydraulic/pneumatic versions immediately seal the fluid paths, preventing spillage and contamination .
Designed for connecting and disconnecting fluid lines under pressure or zero pressure.
Used on excavators, wheel loaders, and demolition machines to change buckets, hammers, shears, and grapples.
Used on industrial robots for automatic gripper or tool exchange.
For rapid connection/disconnection of power and signal circuits in harsh environments.
| Parameter | Hydraulic Coupler | Heavy Equipment Coupler | Robotic Coupler |
|---|---|---|---|
| Flow rate | Up to 150+ L/min | Up to 400+ L/min | N/A (pneumatic: 200+ L/min) |
| Pressure rating | 350–700 bar (5,000–10,000 psi) | 350 bar (5,000 psi) | 8–10 bar (pneumatic) |
| Electrical capacity | N/A | Optional (up to 30 pins) | 15 W–500 W + signal |
| Locking force | N/A | 10–50+ tons retention | 500–5,000 N |
| Weight | 0.1–5 kg | 50–500 kg | 0.5–10 kg |
| Connection time | <5 seconds | <30 seconds (manual) / <5 sec (auto) | <2 seconds |
Prevents fluid loss during connection/disconnection
Eliminates air ingress into the system
Spring-loaded or hydraulic wedge locks engage automatically upon full insertion
Sensors (inductive, magnetic) confirm locked status to control system
Secondary mechanical lock provides fail-safe retention
Combines hydraulic, electrical, and pneumatic lines in a single coupler body
Eliminates separate connections for each utility line
Reduces changeover time from minutes to seconds
Wiper seals and protective caps on unmated halves
Encapsulated springs and sealed bearings prevent debris ingress
The SWC-Type universal drive shaft is the optimal engineering solution for the harsh, high-torque requirements of a Breakdown (BD) Mill. Its integral fork head design provides the structural integrity required to survive extreme impact loads, while its high angular and axial compensation capabilities accommodate the dynamic misalignment of heavy reversing passes. By utilizing high-strength alloy steels and precision heat treatment, the SWC shaft ensures the durability and reliability necessary for the demanding primary breakdown stage of structural steel production.
The SWC-Type universal drive shaft is the optimal engineering solution for the harsh, high-torque requirements of a Breakdown (BD) Mill. Its integral fork head design provides the structural integrity required to survive extreme impact loads, while its high angular and axial compensation capabilities accommodate the dynamic misalignment of heavy reversing passes. By utilizing high-strength alloy steels and precision heat treatment, the SWC shaft ensures the durability and reliability necessary for the demanding primary breakdown stage of structural steel production.
The gear spindle (curved tooth gear coupling) represents a proven, precision-engineered solution for the demanding requirements of bar and wire rod roughing mills. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for primary billet reduction (up to 1600 kN·m), precision-matched spline for smooth axial movement, and smooth operation characteristics makes it an indispensable component for modern bar and wire rod roughing operations.
The SWC-type universal drive shaft represents the optimal engineering solution for the demanding requirements of bar and wire rod roughing mills. Its unique combination of integral fork head construction for reliability, extreme torque capacity for primary billet reduction, angular flexibility for accommodating complex mill geometries (up to 15-25°), and environmental ruggedness for surviving the hostile roughing mill environment ensures reliable power transmission in one of the most challenging applications in the entire long products industry .
The gear spindle represents a proven, precision-engineered solution for the demanding requirements of steel plate finishing mills. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for final plate reduction, and robust construction for reliable operation makes it an indispensable component for modern plate rolling applications.
The curved tooth gear coupling represents the optimal engineering solution for the demanding requirements of industrial bar and wire rod finishing mills. Its unique combination of precision curved tooth geometry, high torque capacity, comprehensive misalignment compensation, and environmental ruggedness ensures reliable power transmission in one of the most challenging high-speed industrial applications.
The universal drive shaft represents an optimal engineering solution for the demanding requirements of PQF seamless tube mills. Its unique combination of integral fork head construction for reliability, high torque capacity for continuous tube reduction, angular flexibility for accommodating stand misalignment, and environmental ruggedness for surviving the harsh mill environment ensures reliable power transmission in this advanced seamless tube production technology.
The gear spindle represents a proven, precision-engineered solution for the demanding requirements of cold strip pickling lines. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for tension control, misalignment compensation capability up to ±3°, and robust construction for reliable operation makes it an indispensable component for modern pickling line drive systems.
The SWC-type universal drive shaft represents an optimal engineering solution for the demanding requirements of the industrial hoisting industry. Its unique combination of integral fork head construction for reliability, high torque capacity for heavy lifting operations, angular flexibility for accommodating structural deflection, and environmental ruggedness for surviving harsh industrial environments ensures reliable power transmission in safety-critical hoisting applications.
The GCJ gear spindle represents a proven, precision-engineered solution for the demanding requirements of hot strip finishing mills. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for final reduction (up to 16,000 kN·m in nitrided versions), and robust construction for reliable operation makes it an indispensable component for modern hot strip rolling applications .
The SWC-type universal drive shaft is a critical and highly engineered power transmission component for the mining industry. Its unique combination of an integral, bolt-free fork head for maximum reliability, high torque density for heavy loads, exceptional angular flexibility, and robust environmental sealing makes it ideally suited for the most demanding mining applications . From primary crushers to miles-long conveyors, the SWC shaft provides the dependable link between power and productivity.
The SWC-type universal drive shaft is a critical and highly engineered power transmission component for the mining industry. Its unique combination of an integral, bolt-free fork head for maximum reliability, high torque density for heavy loads, exceptional angular flexibility, and robust environmental sealing makes it ideally suited for the most demanding mining applications . From primary crushers to miles-long conveyors, the SWC shaft provides the dependable link between power and productivity.
The SWC-type universal drive shaft represents the optimal engineering solution for the demanding requirements of the hot strip continuous casting industry. Its unique combination of integral fork head construction for reliability, high torque capacity for strand extraction and rolling, angular flexibility for accommodating misalignment (up to 15-25°), axial compensation for thermal expansion, and environmental ruggedness for surviving the hostile casting environment ensures reliable power transmission in this critical integrated steel manufacturing process .
The curved tooth gear coupling represents a proven, robust engineering solution for the demanding requirements of steel plate roughing mills. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for primary slab reduction, and proven reliability in the most demanding mill applications makes it an indispensable component for modern plate production.
The SWC-type universal drive shaft represents an optimal engineering solution for the demanding requirements of industrial bar and wire rod finishing mills. Its unique combination of integral fork head construction for reliability, high torque capacity for final section reduction, angular flexibility for accommodating stand misalignment (up to 15-25°), and environmental ruggedness for surviving the harsh mill environment ensures reliable power transmission in this critical final stage of bar and wire rod production.
The curved tooth gear coupling represents a proven, precision-engineered solution for the demanding requirements of single-stand cold strip mills. Its unique combination of fully-crowned tooth geometry for optimized load distribution, exceptional torque capacity for cold reduction, and robust construction for reliable operation makes it an indispensable component for modern cold rolling applications.
The SWC-type universal drive shaft represents the optimal engineering solution for the demanding requirements of seamless tube piercing mills. Its unique combination of integral fork head construction for reliability, extreme torque capacity for primary billet piercing, angular flexibility for accommodating complex roll geometries (up to 15-25°), and environmental ruggedness for surviving the hostile piercing mill environment ensures reliable power transmission in one of the most challenging applications in the entire steel industry .
The SWC-type universal drive shaft represents an optimal engineering solution for the demanding requirements of the industrial paper industry. Its unique combination of integral fork head construction for reliability, high torque capacity for heavy section drives, angular flexibility for accommodating misalignment (up to 15-25°), and environmental ruggedness for surviving the high-moisture paper mill environment ensures reliable power transmission in this critical manufacturing sector.
The SWC-type universal drive shaft represents an optimal engineering solution for the demanding requirements of industrial universal section mills. Its unique combination of integral fork head construction for reliability, high torque capacity for complex section reduction, angular flexibility for accommodating stand misalignment (up to 15-25°), and environmental ruggedness for surviving the harsh mill environment ensures reliable power transmission in this sophisticated sector of structural steel production.
The SWC-type universal drive shaft represents an optimal engineering solution for the demanding requirements of the industrial hoisting industry. Its unique combination of integral fork head construction for reliability, high torque capacity for heavy lifting operations, angular flexibility for accommodating structural deflection, and environmental ruggedness for surviving harsh industrial environments ensures reliable power transmission in safety-critical hoisting applications.
