Product Specification
|
|
|
|
| Packaging Details |
wooden crate |
Brand Name |
HOWOSTAR |
| Model Number |
HOWO Tansmission Assy HW19712 |
Place of Origin |
CHINA |
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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
-
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
-
-
Total Annual:
50,000,00.00-100,000,00.00
-
Employee Number:
50~100
-
Ecer Certification：
Verified Supplier
+ Read More
