Composite Rotating Circular Saw Blade Cutter Head

In 2018, Yantai Equation Mechanical Technology Co., Ltd. unveiled a patented technology—a novel cutter head structure for vehicle-mounted hedge trimmers, the "Composite Rotating Circular Saw Blade Cutter Head." Concurrently, the company launched the 160X series hedge trimmers equipped with this cutter head.

　　After a five-year review by the China National Intellectual Property Administration (CNIPA), the technology was granted a national invention patent in 2023, with the patent number ZL 2018 1 1091422.9.

　　Previously, such products universally employed straight-blade cutter heads, typically featuring three manganese steel straight blades measuring 520-650mm in length. These were driven by a single motor via a belt, relying on the high-speed rotation of the blades to "chop" hedge branches off. However, this design suffered from four major drawbacks:

　　1. Repeated Cutting Leading to Low Efficiency – Cut branches rapidly accumulated in front of the cutter head, forcing the blades to repeatedly slice the same debris. When trimming dense hedges, the piled-up waste could block the cutter head's advance, even stalling the motor.

　　2. Severe "Branch Splitting" Phenomenon – Straight blades relied on high-speed impact to sever branches, often causing splintered cuts, leading to dead branches that impaired hedge growth. The thicker the branch, the worse the damage.

　　3. High Risk of Blade Breakage – The high-speed collision between blades and branches made brittle fractures a serious hazard, especially during prolonged summer operations under high temperatures. Fatigue-prone operators could easily hit hard objects, drastically increasing the risk of sudden blade breakage.

　　4. Flying Debris Hazards – Repeated cutting generated numerous wood chips, which were flung out at high speeds, potentially striking passing vehicles or even injuring drivers and passengers.

　　The 160X series Composite Rotating Circular Saw Blade Cutter Head adopts a "dual-rotation" mechanism:

　　· Each end of the cutter head mounts a 400mm woodworking circular saw blade, driven at high speed by a motor via a belt.

　　· Simultaneously, the cutter head itself is rotated by a hydraulic motor through a special gear set, forming a 1600mm sweeping circle.

　　During operation, the rotating saw blades cleanly cut branches, effortlessly handling thick branches up to 100mm in diameter. The spinning cutter head flings trimmed branches away from the work area, eliminating debris buildup and resolving repeated cutting issues, thereby significantly boosting efficiency.

　　In case of accidental blade impact, the saw blades' strength far exceeds that of straight blades, preventing brittle fractures. Additionally, the sawing principle inherently avoids flying debris, making it safe for use on urban roads, highways, and municipal landscapes.