31results about How to "Control punch depth" patented technology

The invention discloses a punching mechanism for a film mulching rice transplanter. The punching mechanism is characterized in that a plurality of guide holes are formed in a supporting frame; the punching rod is movably matched with the guide hole; the multiple punching needles are obliquely arranged in the length direction of the supporting frame, and the middles of the punching needles are in sliding fit with the through holes in the supporting frame; eccentric wheels are connected to the two ends of the driving shaft and connected with linkage pieces, and the other ends of the linkage pieces are connected with the punching rods. When the driving shaft drives the eccentric wheel to rotate, the linkage piece drives the punching rod to move in the length direction of the guide hole and is linked with the punching needle to perform opening action and punching, the lower end of the punching needle quickly moves to the position below a transplanting claw of the transplanting mechanism, and a mulching film is punctured and moved away instantly before the transplanting claw inserts seedlings into a field. Therefore, the rice transplanting claw can transplant rice at the position punctured by the mulching film. The method has the technical effects that the seedling jumping phenomenon caused by the elasticity of the mulching film is eliminated, meanwhile, the extrusion damage of the broken opening of the mulching film to the rhizome of the seedling is completely eradicated, and the survival rate and the uniformity of transplanting are greatly improved.