Cost Effective Consistent Air Assisted Leaf Spring for Bus Shock Absorption
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Air-Assisted Hybrid Technology: Integrates a high-capacity rubber airbag (or pneumatic cylinder) with a precision-engineered leaf spring pack. The compressed air provides supplemental support that dynamically adjusts to varying load conditions (passenger loads, luggage, etc.). This drastically reduces the initial stiffness of the leaf spring, resulting in a smoother, more consistent ride quality that effectively absorbs shocks and vibrations from uneven road surfaces.
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Enhanced Consistency & Comfort: Unlike conventional solid leaf springs that can feel harsh or “stiff” under light loads, the air-assisted mechanism maintains a constant natural frequency of the suspension. This consistency translates into superior handling for the driver and a more comfortable, nausea-free experience for passengers, which is crucial for city buses and long-distance coaches alike.
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Cost-Effective Durability: Manufactured using high-tensile alloy steel for the spring leaves combined with wear-resistant bushings, this unit is built to last. It requires less frequent replacement of major components compared to fully pneumatic systems, significantly lowering the total cost of ownership (TCO). Its robust construction also makes it highly resistant to corrosion and fatigue, even in harsh weather or coastal environments.
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Easy Maintenance & Retrofit Capability: Designed with standardized mounting points, the air-assisted leaf spring is often compatible with existing leaf spring hanger brackets, simplifying installation and reducing downtime for fleet operators. Routine maintenance is straightforward, typically involving air pressure checks and periodic lubrication of the bushings.
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City transit buses
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Intercity coaches
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Tourist buses
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Heavy-duty shuttle vehicles
🏭About Zhengzhou Haishuo Automotive Parts Co., Ltd.
Production Capacity: Over 4,000 tons of leaf springs in stock, enabling rapid order fulfillment
Global Reach: Exported to over 100 countries and regions, including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Western Europe
OEM/ODM Services: Custom manufacturing available for private label, OEM, and aftermarket projects
Quality Assurance: Backed by SGS audit certification, with dedicated QA/QC inspectors ensuring every product meets international standards
Comprehensive Product Line: Our catalog includes heavy-duty, conventional, parabolic, and trailer leaf springs, plus complete accessories like U-bolts, bushings, clips, and shackles
Leaf Spring Technical Parameters
| Item | Specification |
|---|---|
| Material | 50CrVA / 51CrV4 / 55CrMnA / 60Si2Mn |
| Width | 60mm – 120mm |
| Thickness | 6mm – 30mm |
| Load Capacity | 500kg – 20,000kg |
| Surface Treatment | Painting / E-coating |
📦Packaging, Shipping & Terms
Packaging: Standard export wooden crates or cartons with protective wrapping to prevent damage during transit
Shipping Ports: Qingdao Port, Tianjin Port and LianYun Port
Lead Time: 30 days (peak season) / 30 days (off season)
Accepted Incoterms: FOB, EXW, DDP, CIF, CFR
Payment Terms: L/C, T/T, D/P, PayPal, Western Union, small-amount payment options available
After-Sales Support: Professional sales and technical team providing order follow-up, product consultation, and after-sales service
Why Choose Our Leaf Springs
- Manufactured using high-strength alloy steel (SUP9 / 60Si2Mn)
- Heat-treated for improved hardness and fatigue resistance
- Shot peening surface treatment for longer service life
- Strict load and fatigue testing before shipment
- OEM interchangeable fitment with Dongfeng systems
- Stable performance under heavy-duty working conditions
FAQ
Q1: Is this part OEM or aftermarket?
A: It is an OEM-compatible replacement designed for Dongfeng truck suspension systems.
Q2: What material is used in this leaf spring?
A: High-strength alloy steel such as SUP9 or 60Si2Mn.
Q3: Can you produce customized leaf springs?
A: Yes, OEM and customized production is available.
Q4: What is your delivery time?
A: Typically 20–30 days depending on order quantity.
Q5: What vehicles is it compatible with?
A: It is suitable for various Dongfeng heavy-duty truck platforms.
Common Problems of Worn Leaf Springs
Vehicle tilting or sagging on one side
Reduced load-carrying capacity
Excessive vibration during driving
Visible cracks or deformation on spring leaves
When to Replace Leaf Springs
Leaf springs should be replaced when fatigue cracks, deformation, or reduced elasticity are observed. Delayed replacement may affect vehicle safety and suspension performance.
Important Notes
This product is an aftermarket replacement part, not an original OEM part. It is designed to fit the specified applications as a direct replacement component.
We recommend professional installation by a qualified technician to ensure proper fit, alignment, and safety.
contact us with your vehicle details or custom requirements, and our team will assist you in finding the right leaf spring solution.
