43results about How to "Improve shear performance" patented technology

The invention discloses a pair of bionic self-clamping fruit tree scissors. A fixed blade, an intermediate plate and a branch clamping plate are fixed sequentially; a movable blade is connected with the outer side of the fixed blade; movable clamps are connected with the outer side of the branch clamping plate; a handle I and a handle II are fixed between the branch clamping plate and a blade laminate; a spindle-shaped spring is fixed between the handle I and the handle II; a twisting spring is fixed between the handle I and an intermediate plate layer; the movable blade is hinged to the handle I via a connecting rod II; a connecting rod I is connected with the handle II; a connecting rod III is connected with the connecting rod I via a circular slide block screw; the movable clamp I is riveted to the connecting rod III; the movable clamp II is riveted to the tail end of the movable clamp I; and a return spring is mounted between the movable clamp I and the movable clamp II. The pair of scissors simulates a clamping action of fingers of human during pruning, adopts a design structure of picking fruits or twigs by a single hand, can achieve a differential clamping trimming function, clamps the fruits while the twigs are cut off by the fruit tree scissor blades, and achieves single-hand fruit picking and branch pruning.

The invention discloses an extrusion type 3D white marble powder printing slurry and a preparation method thereof. The slurry of the invention has high solid content and good shear performance, and is suitable for extrusion 3D printing technology. At room temperature, it can gradually dry and solidify during the 3D printing process, so as to obtain high-precision molded parts without collapse.

The invention discloses a shearing force resistant connection structure for an air-termination system. The shearing force resistant connection structure comprises two lightning receiving rods opposite to each other, wherein opposite surfaces of the two lightning receiving rods opposite to each other are arc-shaped, connection blocks are also arranged at outer surfaces of side surfaces at ends of the opposite surfaces of the lightning receiving rods, and the two lightning receiving rods are connected by a spring between the connection blocks. By dividing an integrated lightning receiving rod into the two lightning receiving rods opposite to each other, connection parts are connected by the spring, the spring can be bent when a shearing force such as cross wind is applied, the lightning receiving rods are enabled not to be broken, and the lightning receiving rods are recovered under the effect of the spring during no wind and are enabled to be vertical and upward; and meanwhile, the opposite surfaces are arc surfaces and are beneficial for point discharge, namely, the two lightning receiving rods are not physically connected. The shearing force resistant connection structure has the advantages of excellent shearing force resistant performance, high safety and low improvement cost, the lightning receiving rods are enabled not to be broken by a shearing force, and an existing lightning receiving rod can be directly changed.