This throttle knob refueling switch is engineered for stable performance in harsh construction and mining operation scenarios, designed to match standardized specifications for consistent installation and functional compatibility with corresponding excavator models. It is constructed with high-strength wear-resistant engineering materials, delivering excellent structural durability and heat resistance to maintain stable operation under long-term high-frequency operation and temperature fluctuation environments. The precision-engineered internal structure ensures smooth signal transmission during throttle adjustment, supporting accurate refueling control to maintain steady excavator power output during earthwork, loading and foundation construction tasks. The reinforced outer shell provides effective physical blocking of construction site dust and debris, reducing the risk of internal component jamming caused by external particulate intrusion, lowering downtime frequency and cutting routine maintenance costs. Its interface size is fully consistent with factory standard parameters, enabling direct replacement without additional modification, simplifying on-site replacement operation for maintenance personnel.