High Quality TYW Series Foot Operated Hydraulic Drum Brake

1. Series Overview & Core Function

The TYW Series (T = Foot, Y = Hydraulic, W = Drum) is engineered as a manual safety brake to provide operator-initiated control over machinery movement. Its core functions include:

Operator-Controlled Braking: Allowing precise, gradual deceleration or immediate stopping of equipment via foot pedal input-critical for maneuvering in tight spaces (e.g., warehouse forklifts) or positioning loads (e.g., small cranes).

Static Load Holding: Securing loads in place when the pedal is fully depressed, even during extended pauses (e.g., holding a winch-suspended load mid-air).

Emergency Manual Braking: Serving as a backup braking system in case of primary system failure, ensuring operator safety in high-risk scenarios.

Covering drum diameters from 150–400mm and torque outputs from 100–2,000 N·m, the series is optimized for medium-load applications (1–10 tons) requiring direct human control.

2. Working Principle

The TYW Series operates on a hydraulic amplification principle, where manual foot force is converted into increased hydraulic pressure to actuate braking. Its working cycle includes three key states:

2.1 1. Brake Release (Normal Operation)

When the operator is not pressing the foot pedal, the brake's hydraulic system is in a relaxed state. Internal return springs retract the brake shoes, creating a gap (0.3–0.5mm) between the shoes and the rotating drum.

The drum (connected to the machinery's drive shaft) rotates freely, allowing the equipment to move (e.g., a forklift traveling, a winch lifting).

2.2 2. Brake Engagement (Controlled Stopping/Holding)

Controlled Stopping: When the operator presses the foot pedal, a mechanical linkage drives a small hydraulic pump (integrated into the pedal assembly). This pump generates hydraulic pressure (5–15 MPa) that is transmitted via hoses to the brake's hydraulic cylinder.

The pressurized cylinder extends, pushing the brake shoes against the rotating drum. Friction between the shoes' linings and the drum generates braking torque, with the force proportional to pedal pressure-enabling smooth, adjustable deceleration.

Static Holding: For prolonged load security (e.g., parking a forklift or holding a winch load), the operator fully depresses the pedal and engages a locking mechanism (e.g., a pedal latch). This maintains hydraulic pressure, keeping the shoes engaged with the drum without continuous foot force.

2.3 3. Emergency Braking

In case of unexpected movement or danger, the operator can stomp the pedal to maximum pressure. This instantly generates peak hydraulic pressure, driving the shoes against the drum with full force (rated torque) to stop the machinery quickly (≤ 1.5 seconds under rated load).

3. Core Structure & Key Components

The TYW Series features a rugged, user-centric design with four critical subsystems:

3.1 1. Foot-Pedal Hydraulic Actuation Unit

Foot Pedal & Linkage: A heavy-duty steel pedal connected to a lever system, designed for comfortable operation (pedal travel: 50–100mm) and durability under repeated use.

Integrated Hydraulic Pump: A small piston pump (mounted near the pedal) that converts mechanical pedal force into hydraulic pressure. It includes a check valve to maintain pressure when the pedal is locked.

Hydraulic Hoses & Cylinder: High-pressure hoses (rated for 20 MPa) connect the pump to a hydraulic cylinder mounted on the brake assembly. The cylinder's piston converts hydraulic pressure into linear force to actuate the brake shoes.

3.2 2. Drum Braking Assembly

Brake Shoes: Dual arcuate steel shoes (high-strength carbon steel) shaped to match drum diameters (150–400mm). They are reinforced to withstand high friction forces and prevent deformation.

Friction Linings: Semi-metallic or resin-based composite linings (μ ≥ 0.40) with heat resistance up to 350°C. The linings are riveted to the shoes for easy replacement and long wear life (≥ 6,000 working hours).

Drum Compatibility: Designed for standard industrial drums (material: 45# steel or cast iron) with thickness 10–20mm, ensuring broad compatibility with machinery drive systems.

3.3 3. Return & Locking Mechanism

Return Springs: High-tension steel springs that retract the brake shoes and pedal when pressure is released, returning the system to the "brake off" state.

Pedal Lock: A mechanical latch (lever or pin) that secures the pedal in the depressed position, maintaining hydraulic pressure for static load holding without operator input.

3.4 4. Protection & Mounting Components

Anti-Corrosion Coating: The pedal, brake frame, and hydraulic cylinder are coated with epoxy resin (thickness ≥ 80μm) or galvanized to resist rust, dust, and moisture-suitable for outdoor (construction sites) or indoor (warehouses) use.

Vibration-Resistant Mounts: Rubber bushings or shock absorbers on the pedal and brake assembly reduce vibration transfer, enhancing operator comfort and component longevity.

4. Key Features & Advantages

The TYW Series is distinguished by its manual control and robust performance, with the following core benefits:

4.1 1. Intuitive Operator Control

Foot-pedal actuation allows operators to modulate braking force precisely-critical for tasks like positioning loads or navigating tight spaces (e.g., forklifts in warehouses). The proportional pressure response ensures smooth, jerk-free stopping.

4.2 2. Hydraulic Force Amplification

The integrated pump amplifies foot force by 5–10 times, enabling operators to generate high braking torque (up to 2,000 N·m) with minimal physical effort-reducing operator fatigue during extended use.

4.3 3. Reliable Mechanical Backup

Unlike fully automated brakes, the TYW Series relies on manual input and hydraulic pressure, making it a trusted backup in case of electrical or pneumatic system failures-enhancing safety in critical operations.

4.4 4. Durable & Low-Maintenance

Heavy-duty steel components and high-pressure hydraulic lines withstand rough handling and harsh environments (e.g., construction dust, rain).

Friction linings are easily replaceable, and hydraulic fluid (mineral oil) requires only periodic checks-minimizing maintenance downtime.

4.5 5. Versatile Mounting Options

Available with flange or bracket mounts, the brake adapts to diverse machinery (cranes, winches, forklifts) without extensive modifications. The pedal assembly can be positioned remotely (via extended hydraulic hoses) for ergonomic operator access.

5. Typical Applications

The TYW Series is widely used in manually operated or semi-automated machinery, including:

Small Cranes & Hoists: Jib cranes, workshop hoists, and portable gantry cranes-for precise load positioning and emergency stopping.

Forklifts & Material Carts: Industrial forklifts, tow tractors, and heavy-duty carts-for parking, downhill control, and load security.

Winches & Pullers: Manual or semi-electric winches (construction, marine, or off-road)-for controlled lowering and holding of loads.

Construction Equipment: Mini excavators, skid-steer loaders, and concrete mixers-for safe maneuvering on job sites.

 

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