The YJGQ-16 is a medium-duty hydraulic rail clamp from the YJGQ series, designed for anti-slip locking and static positioning of light-to-medium rail-mounted industrial machinery. It adopts a "fail-safe" design (spring-engaged clamping, hydraulic release) with compact structure, reliable locking performance, and easy integration. The model designation clarifies core parameters: "YJGQ" for Hydraulic Rail Clamp series, "16" for nominal clamping force (16 kN). Widely used in indoor workshops, logistics yards, and low-wind outdoor scenarios, it secures machinery with load capacities of 5–50 tons, compatible with standard light-to-medium rail models (e.g., P38, P43). Details of its working principle and applications are as follows:
1. Working Principle
The clamp operates based on "spring-driven clamping + hydraulic release" logic, supplemented by wear-compensation and safety interlock designs. The core working process includes three key states:
1.1 Clamping (Default Safety State)
When the rail-mounted equipment (e.g., light gantry crane, rail transfer cart) is shut down, powered off, or in emergency mode, the hydraulic system is depressurized.
Internal high-tension compression springs (65Mn steel) release elastic force, pushing the clamp's upper and lower jaw plates to close inward synchronously.
The jaw plates (lined with wear-resistant rubber composite pads) tightly grip the rail's top surface and side flanges. The 16 kN clamping force generates sufficient friction (friction coefficient μ ≥ 0.6) to lock the equipment's wheel set, preventing sliding due to gravity, vibration, or minor external impact.
A mechanical self-locking structure in the jaw linkage maintains clamping force without additional energy input, ensuring stable static positioning.
1.2 Release (Operating State)
When the equipment needs to move, the hydraulic system (working pressure: 8–12 MPa) is activated. Hydraulic oil is delivered to the clamp's single-acting cylinder, driving the piston to overcome the spring force.
The piston pulls the jaw plates apart outward, creating a 3–5 mm uniform clearance between the rubber pads and the rail.
The clamp is fully released, and the equipment's wheel set rolls freely along the rail, enabling normal traveling (e.g., crane movement, material transfer).
1.3 Safety & Stability Guarantee
Emergency Response: In case of hydraulic system leakage or power loss, the compression springs rebound within ≤0.4 seconds, driving the jaws to re-clamp the rail-avoiding equipment displacement, especially on slightly inclined rails (≤8° slope).
Wear Compensation: A built-in adjustable screw compensates for up to 8 mm of rubber pad wear, maintaining consistent clamping force without frequent manual adjustment.
Interlock Control: Equipped with IP65-protected limit switches that send "clamped" or "released" signals to the equipment's control system. The equipment can only start moving when the clamp is fully released, preventing misoperation.
2. Key Features
Fail-Safe Reliability: Spring-engaged design ensures automatic locking in all fault scenarios, eliminating safety risks for rail-mounted equipment.
Compact & Lightweight: Total weight ≈15–20 kg and small installation footprint, suitable for equipment with limited mounting space.
Rail-Friendly Design: Rubber composite pads avoid rail surface damage while enhancing friction, protecting the rail from wear during clamping.
Easy Maintenance: Modular structure and clip-on rubber pads enable quick replacement; no full clamp disassembly required for routine maintenance.
Wide Environmental Adaptability: IP65 protection enclosure and anti-corrosion coating (epoxy resin) adapt to indoor dusty workshops and outdoor mild-humidity environments (-10°C to 80°C).
3. Typical Applications
The YJGQ-16 is optimized for light-to-medium rail-mounted machinery (load capacity: 5–50 tons) and compatible with common rail models (P38, P43, P50). Core applications include:
3.1 Workshop & Logistics Machinery
Light Gantry Cranes & Overhead Crane Traveling Mechanisms: Secures equipment during workpiece loading/unloading or maintenance in factories, workshops, and logistics centers. Prevents sliding on flat or slightly inclined rails (≤8°).
Rail-Mounted Transfer Carts: Locks material transfer carts (e.g., workpiece transport carts, tool carts) during loading/unloading or shutdown, ensuring positioning accuracy in narrow workshop spaces.
3.2 Light Industrial Hoisting & Transport Equipment
Small Container Stackers & Light Loaders: Secures light rail-mounted stackers in warehouses or small ports, resisting minor wind loads and ensuring stable operation during cargo handling.
Assembly Line Rail Systems: Locks rail-mounted worktables or automated guided vehicle (AGV) rails in production lines, preventing displacement during workpiece assembly or testing.
3.3 Construction & Auxiliary Machinery
Small Construction Hoists & Rail-Mounted Scaffolding: Secures light rail-mounted equipment on construction sites, preventing sliding on temporary flat rails during construction pauses.
Garden & Municipal Machinery: Locks rail-mounted maintenance vehicles (e.g., track inspection carts, small greening equipment) in parks, municipal rail systems, or indoor facilities.
3.4 General Industrial & Testing Equipment
Rail-Mounted Test Benches & Precision Machinery: Provides stable positioning for industrial test benches or precision equipment rails, avoiding vibration-induced displacement and ensuring test accuracy.
Small Amusement & Exhibition Equipment: Locks rail-mounted small amusement rides (e.g., indoor track trains) or exhibition display carts, ensuring safety during operation or shutdown.
