Height-Elastic Cutting Mechanism for Uneven Ground Adaptation

The patent applies the dynamics principle by replacing the rigid, fixed cutter bar with a dynamic suspension system. The cutter bar is mounted on a swinging arm that can pivot about a horizontal axis, allowing the cutting elements to move vertically in response to ground irregularities. This dynamic mounting enables the cutter bar to adapt its position to uneven ground conditions while maintaining the overall structural simplicity of the frame.

The patent implements the self-service principle through the spring-supported swinging arm mechanism. The spring automatically adjusts the cutter bar height in response to ground conditions without requiring external control systems. When the cutter bar encounters ground irregularities, the spring force naturally absorbs the impact and maintains contact, enabling the system to self-regulate its position continuously and rapidly without hydraulic controls or sensors.

The patent applies beforehand cushioning by positioning a spring between the cutter bar and the frame. This spring acts as a pre-configured cushion that absorbs ground contact forces before they can transmit damaging impacts to the cutter bar or frame. The spring is pre-loaded to provide continuous contact force, ensuring the cutter bar remains close to the ground for complete harvest while the spring cushion prevents damage from inevitable ground contacts.

The patent resolves this contradiction by changing the spatial arrangement from mounting the spring below the swinging arm (vertical dimension constraint) to mounting it above the swinging arm. This dimensional repositioning allows the spring to provide the necessary support force for ground adaptation while the cutter bar maintains adequate ground clearance. The spring force is transmitted through the swinging arm pivot point, achieving ground adaptation without reducing clearance.