High-Performance Rubber, Combining Rigidity and Flexibility: Hitachi Genuine Rubber Buffers
Hitachi Genuine Rubber Buffers are manufactured using a variety of high-performance rubber materials tailored to their mounting location and stress characteristics. Natural Rubber (NR) offers excellent elasticity and tear resistance, making it suitable for tension buffers that endure severe impacts. Nitrile Rubber (NBR) provides outstanding oil resistance, ideal for engine mounts potentially exposed to oil. Polyurethane (PU) exhibits exceptional wear resistance, perfect for bushings and cushions under constant stress. Each material undergoes strict formula optimization to achieve the optimal balance in key performance indicators such as hardness (Shore A), tensile strength, and elongation at break.
Precision Vulcanization, Integrated Molding: Hitachi Genuine Rubber Buffers utilize a precision compression molding process. Under high temperature and pressure, the rubber is firmly bonded to any metal insert, forming a single integrated unit. The metal surface is treated with shot blasting and adhesive coating to ensure robust rubber-to-metal bond strength, preventing delamination even under severe impacts. The resulting vulcanized rubber buffer features a clear profile and precise dimensions, ensuring a perfect fit with the mounting seat for uniform stress distribution and stable vibration damping performance.
Multi-Stage Damping, Efficient Energy Absorption: For continuous vibration damping applications like engine mounts and cab suspensions, Hitachi Genuine Rubber Buffers often employ a multi-layer composite structure. Layers of rubber with different hardness levels are alternately stacked, compressing progressively upon impact to absorb energy and convert high-frequency vibrations into low-amplitude displacement. This multi-stage damping design effectively isolates the wide-band vibrations from the engine, protecting the chassis structure while significantly enhancing operator comfort.
Weather & Oil Resistance, Long-lasting Performance: The rubber compounds in Hitachi Genuine Rubber Buffers incorporate anti-ozonants, anti-UV agents, and heat aging inhibitors, ensuring stable performance within an extreme temperature range of -40°C to +120°C. In highly corrosive environments such as mines or coastal areas, genuine buffers resist ozone cracking, UV degradation, and swelling caused by oil ingress. Their service life far exceeds that of ordinary rubber products.
Track Tension Buffering, Protecting the Undercarriage: In the track tensioning systems of excavators and bulldozers, the buffer spring assembly and rubber buffer jointly form the "last line of defense" for the undercarriage. When the track experiences severe impact, the tension cylinder compresses the spring. The rubber buffer acts as an elastic limit stop at the end of the stroke, absorbing the remaining impact energy and preventing hard metal-to-metal contact between the idler and tension cylinder. Hitachi Genuine Tension Buffers utilize high-elasticity natural rubber, maintaining excellent resilience even after thousands of compression cycles.
Cab Suspension, Ensuring Comfort: Hitachi Genuine Cab Rubber Mounts provide a flexible connection between the cab and the chassis through precisely designed shear-type and compression-type rubber springs. During digging, traveling, or breaking operations, severe chassis vibrations are effectively isolated by the rubber mounts. The vibration energy transmitted to the cab is significantly reduced, allowing operators to work comfortably in a relatively stable environment, effectively alleviating fatigue.
Engine Mounts, Reducing Noise and Vibration: The engine is the primary vibration source on machinery. Hitachi Genuine Engine Rubber Mounts feature multi-directional elasticity design, supporting the engine's weight while absorbing vibrational energy from all directions. The viscoelastic properties of the rubber dissipate mechanical vibrations as heat energy, effectively reducing vibration and noise transmitted to the chassis. This also protects peripheral components such as radiators and piping from fatigue damage.
