Dongfeng VR truck parts Rear Mount Lower Bracket 5001141-C1101

Built to withstand the extreme loads of the rear suspension system (supporting cab weight and absorbing road vibration), the bracket uses premium Q345B low-alloy structural steel with a minimum yield strength of 345 MPa. The material undergoes hot-rolled forming and precision machining to ensure uniform thickness (8mm at stress points, 6mm at non-load-bearing areas), balancing strength and weight. Finite Element Analysis (FEA) testing confirms it can handle a static load of 8,000N (well above the VR’s cab rear mount load of 5,500N) without permanent deformation, and a dynamic load of 4,000N (simulating road bumps) for 100,000 cycles without fatigue failure. Unlike low-carbon steel brackets that bend under heavy loads, this high-strength design ensures stable support for the rear suspension system throughout the truck’s service life

Engineered to endure constant vibration and cyclic loads from the rear suspension, the bracket features a reinforced structural layout. Key stress points (e.g., mounting hole edges, frame contact surfaces) are equipped with 5mm-thick welded gussets that distribute load over a larger area, reducing local stress concentration by 40%. The bracket’s surface is treated with shot peening (Almen intensity 0.3A) to introduce compressive residual stress into the steel, increasing fatigue life by 50% and preventing crack initiation from vibration. A 3mm-deep recessed area on the frame contact side accommodates a rubber damping pad (included), which absorbs 60% of vibration transfer between the bracket and frame—minimizing noise and reducing wear on both components. Unlike basic flat brackets that fail from fatigue, this reinforced design maintains structural integrity for 8+ years of heavy use

Designed to resist corrosion from road salt, mud, and moisture (common in underbody environments), the bracket undergoes a comprehensive three-stage anti-corrosion treatment. First, a zinc phosphate conversion coating (60μm thickness) creates a porous base that improves coating adhesion. Next, an electrophoretic primer (80μm) is applied to form a uniform barrier against moisture, followed by a thermosetting polyester topcoat (50μm, RAL 9005 black) that resists chipping and fading. This coating system passes 1,200 hours of neutral salt spray testing (equivalent to 10 years of road salt exposure) without rust or coating peeling. The mounting holes are also coated with anti-seize compound to prevent thread corrosion, ensuring easy bolt removal during maintenance. Unlike uncoated or single-layer brackets that rust within 2–3 years, this design remains corrosion-free even in harsh coastal or winter conditions

Designed for hassle-free replacement by fleet technicians or DIY owners, the bracket simplifies installation with precision-machined features and user-friendly design. All mounting holes are drilled with H9 tolerance (ensuring perfect bolt fit) and deburred to prevent damage to bolt threads. Two laser-etched alignment marks on the bracket’s top surface line up with reference points on the VR’s rear frame, eliminating guesswork and reducing installation time by 30% (typically 20–25 minutes). The package includes all necessary hardware: 4 M12×35mm high-tensile bolts, lock washers, and a rubber damping pad (pre-cut to fit the bracket’s recessed area). Installation steps are straightforward: clean the frame mounting surface, align the bracket’s marks with the frame, secure the bolts to 95 N·m torque, and attach the rear mount upper bracket. Each unit undergoes dimensional verification via CMM, load testing, and coating adhesion checks, backed by a 36-month warranty against defects (e.g., bending, cracking, coating failure)