FAST Gearbox Assy AZEK3BEXJG Shock absorber plate HB400-60003-1

As a key component of the gearbox’s vibration control system, this shock absorber plate’s core function is to reduce vibration and noise transmission between the gearbox and the vehicle chassis. It adopts a "multi-layer composite damping structure" principle: the plate consists of a rigid base layer (to bear load) and an elastic damping layer (to absorb vibration). When the gearbox generates vibration during operation (caused by gear meshing, torque fluctuations, or road bumps), the elastic damping layer deforms to convert mechanical vibration energy into low-grade heat energy, thereby attenuating vibration amplitude by 30%-45% (tested under standard working conditions). This not only reduces noise in the driver’s cab (lowering noise levels by 5-8 dB) but also protects other chassis components from excessive vibration damage

The shock absorber plate features an optimized structural design and high-quality material combination for durability and performance:

Rigid Base Layer: Made of high-strength carbon steel (Q355B) with a thickness of 8-10 mm, it provides strong load-bearing capacity (maximum static load of 1200 kg) to support the gearbox’s weight without deformation.

Elastic Damping Layer: Composed of nitrile rubber (NBR) with a Shore hardness of 50-60, it offers excellent elasticity, oil resistance, and aging resistance—critical for withstanding long-term contact with gearbox oil and high temperatures.

Mounting Design: Equipped with 4 precision-drilled mounting holes (diameter: 12 mm) with countersunk heads, ensuring secure attachment to both the gearbox and chassis while preventing bolt loosening due to vibration

This shock absorber plate is designed to meet the rigorous demands of heavy-duty operating environments, with key performance parameters including:

Vibration Attenuation Frequency Range: 10-500 Hz, covering the main vibration frequency spectrum of FAST AZEK3BEXJG gearboxes during idle, acceleration, and high-speed operation.

Operating Temperature Range: -40℃ to 120℃, maintaining stable damping performance in extreme cold (e.g., northern winter) or high-temperature (e.g., engine compartment heat) conditions.

Aging Resistance: Passes 1000-hour accelerated aging tests at 120℃, with no more than 15% loss of elasticity, ensuring a service life of over 80,000 km under normal use.

Oil Resistance: Resists swelling or cracking after 500-hour immersion in standard gearbox oil (API GL-5), avoiding performance degradation caused by oil erosion

The shock absorber plate is primarily applied in FAST AZEK3BEXJG-equipped vehicles, including:

Heavy-duty trucks for long-distance cargo transportation (e.g., 18-wheelers, 25-ton dump trucks);

Specialized vehicles such as concrete mixers and tankers (where gearboxes endure continuous high-load operation);

Engineering machinery like large loaders and road rollers (exposed to rough terrain and intense vibration).

In terms of installation, it offers distinct advantages:

Direct Replacement: Matches the original shock absorber plate’s dimensions and mounting positions, requiring no modifications to the gearbox or chassis—installation can be completed using standard tools (e.g., torque wrench) in 20-30 minutes.

Pre-Installed Cushion Pads: The mounting holes are pre-fitted with rubber cushion pads to further reduce vibration transfer between the bolt and plate, enhancing overall damping effect.

Weight Optimization: Weighs only 1.8-2.0 kg, adding minimal additional load to the vehicle while providing robust shock absorption—balancing performance and fuel efficiency