-
Place of OriginCHINA
-
Brand NameHOWOSTAR
-
Model NumberHOWO Tansmission Assy HW19712
-
Minimum Order Quantity1
-
Packaging Detailswooden crate
HOWO Tansmission Assy HW19712
Functions and Applications of HW19712 Transmission Assembly
The HW19712 transmission assembly, a 12-speed manual gearbox developed byChina National Heavy Duty Truck Group (CNHTC), is engineered for heavy-duty commercial vehicles, offering optimized power delivery, durability, and adaptability across diverse operational scenarios. Its key functions and applications are as follows:
1. Multi-Gear Configuration for Adaptive Power Transmission
• 12 Forward + 2 Reverse Gears: The HW19712 provides12 forward gears and 2 reverse gears, enabling precise torque and speed adjustments for heavy loads, steep inclines, and highway cruising.
• Example: Lower gears (1–6) deliver high torque for off-road or construction use, while higher gears (7–12) enhance fuel efficiency during highway transport.
• Max Input Torque: Handles up to1900 N·m (2100 N·m for HW19712C/CL variants), ensuring reliability under extreme loads.
2. Robust Structural Design for Heavy-Duty Use
• Two-Section Layout: Comprises amain box (6 forward gears)and anauxiliary box (2 gears), combining to form 12 forward speeds.
• Dual Countershaft Mechanism: The main box uses two countershafts spaced 180° apart, reducing torque load per shaft and minimizing axial length.
• Planetary Gear Reduction: The auxiliary box employs a planetary gear system for high torque transmission, compact design, and extended service life.
3. Advanced Gear Shifting Mechanisms
• Sliding Sleeve Synchronization: Shifts are executed via sliding sleeves with 35° taper angles, allowing automatic centering and synchronization during engagement.
• Manual Main Box + Pneumatic Auxiliary Box: The main box is manually shifted, while the auxiliary box uses pneumatic control for seamless high/low-range switching.
4. Load Distribution and Stress Reduction
• Floating Main Shaft: The main shaft operates in a floating state, distributing radial forces evenly and eliminating traditional needle bearings, thus reducing wear and improving reliability.
• Optimized Gear Meshing: "Tooth Alignment" ensures proper gear engagement, minimizing noise and vibration.
5. Efficient Lubrication System
• Forced + Splash Lubrication: Combines a high-flow pump for forced lubrication of critical components (e.g., synchronizers, bearings) with splash lubrication for gears.
• Integrated Oil Filter: Maintains oil cleanliness, extending transmission life.
6. Power Take-Off (PTO) Compatibility
• Rear PTO Integration: Supports optional PTOs (e.g., HW50, HW70) for auxiliary equipment (e.g., hydraulic pumps, cranes), with forced lubrication eliminating the need for additional oil.
7. Lightweight and Compact Design
• Aluminum Alloy Option: Optional aluminum housing reduces weight by up to 15% compared to steel, improving fuel economy and payload capacity.
Key Specifications for HW19712 Transmission Assembly
Parameter Details
Model HW19712 (Standard), HW19712C/CL (High-Torque)
Gear Configuration 12F + 2R
Max Input Torque 1900 N·m (Standard), 2100 N·m (C/CL)
Rated Speed 2600 rpm
Weight 357 kg (Standard), 392 kg (C/CL)
Oil Capacity 13–14.5 L
Total Length 915 mm
Head Gear Ratio 11.8 (Standard), 15.01 (Alternative)
Industrial Applications
• Logistics & Transport: Long-haul trucks benefit from the 12-speed range and fuel efficiency.
• Construction & Mining: Dump trucks and excavators leverage high torque and durability for rough terrain.
• Specialized Vehicles: Fire trucks, cement mixers, and military vehicles utilize PTO compatibility for auxiliary systems.
The HW19712 transmission assembly stands out for itsmulti-gear adaptability, robust construction, and efficient lubrication, making it a cornerstone of heavy-duty commercial vehicle engineering. Its compatibility with PTOs and optional aluminum housing further enhances its versatility across industries.
Related Products
Our products are sold all over the world, you can rest assured.
