TYW-400 Foot Operated Hydraulic Drum Brakes

⚙️ Product Overview

The TYW-400 is a Hydraulic Block Brake (Drum Brake) specifically designed for foot operation. Unlike standard electrically driven brakes, this system utilizes a foot-operated hydraulic pump (pedal) to generate the pressure required to actuate the brake caliper (cylinder).

The model number indicates:

TYW: The series designation for Hydraulic Block Brakes (typically "Normally Open" or controlled by user input).

400: The compatible Brake Drum Diameter of 400 mm.

This system is distinct because it allows the operator to have direct, variable control over the braking force and timing, rather than relying on an automated electrical signal.

💡 Key Features & Characteristics

Foot-Operated Hydraulic Control:
The system is driven by a foot pedal connected to a hydraulic pump. This allows the operator to "modulate" the braking force-pressing harder increases the clamping force on the drum. This is ideal for applications requiring "feel" and precise manual control.

Normally Open Operation:
The TYW series is typically a "Normally Open" device. This means the brake does not engage unless the operator actively presses the pedal. When the pedal is released, the hydraulic pressure drops, and the brake releases (or remains released via spring return).

Equalizing Mechanism:
The brake features an interlocked equalizing device. This ensures that the brake shoes (linings) retract evenly from the brake wheel on both sides. This prevents uneven wear and eliminates "drag" (rubbing) when the brake is not engaged.

Self-Lubricating Bearings:
The main pivot points are equipped with self-lubricating bearings, which increases transmission efficiency and extends the lifespan of the unit without requiring frequent manual greasing.

Manual Closing Device:
Some models in the TYW series include a manual closing (locking) device. This allows the brake to be mechanically locked in the "closed" (braking) position when the machine is not in use (e.g., for parking or maintenance), acting as a parking brake.

Easy Maintenance:
The brake linings are typically "card-mounted" (slotted) for quick replacement. The system is designed for horizontal installation relative to the brake wheel axis.

🏭 Typical Applications

The TYW-400 is primarily used in machinery where manual control of the swing or rotation is required:

Cranes: Specifically Slewing (回转) Mechanisms of Portal Cranes (Port Machinery) and Tower Cranes.

Excavators: Swing brakes for large excavators (where the operator controls the swing stop).

Winches: Manual control of winch speed or holding.

Construction Machinery: Applications requiring a "dead man's switch" or operator-controlled braking.

📋 General Technical Specifications

Note: The TYW-400 is often paired with a specific foot pump assembly (master cylinder). When replacing parts, ensure the hydraulic cylinder bore matches the pedal pump's output to maintain the correct mechanical advantage and braking torque.

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