34results about How to "Precise displacement control" patented technology

The invention discloses an electric stair-climbing robot which comprises a stair-climbing machine table. The stair-climbing machine table is longitudinally provided with two through grooves. Two oil motors are symmetrically arranged on the lower portion of the stair-climbing machine table. A force output shaft of each oil motor is connected with a lead screw, and the lead screws are installed on the stair-climbing machine table. Each of the two lead screws penetrates through one oil cylinder, inner threads matched with the lead screws are arranged in the oil cylinders, and the oil cylinders and the lead screws form thread transmission pairs. The tops of the oil cylinders are fixedly connected with a clutch, the clutch is located in the through grooves, a manned plate is arranged at the top end of the clutch, and the oil cylinders drive the manned plate to move through the clutch. Stair climbing can be achieved by means of the two oil cylinders through stretching, retracting and forward and backward alternative movement of piston rods.

The invention discloses a pallet-free off-line stacking device. The pallet-free off-line stacking device comprises a pallet returning machine, a primary brick push mechanism, a primary brick receivingplatform, a secondary brick push mechanism, a secondary brick receiving platform, a third brick push mechanism, a third brick receiving platform, a fully-automatic green brick stacking machine and apiled brick conveyor. By means of the primary brick push mechanism, bricks on each single layer can be pushed from the pallet returning machine to the primary brick receiving platform. By means of thesecondary brick push mechanism, the bricks on each single layer can be pushed from the primary brick receiving platform to the secondary brick receiving platform. By means of the third brick push mechanism, the bricks on each single layer can be pushed from the secondary brick receiving platform to the third brick receiving platform. By means of the fully-automatic green brick stacking machine, the bricks on each single layer can be clamped and delivered from the third brick receiving platform to the piled brick conveyor. The third brick push mechanism comprises two movable push block platesand multiple third fixing push plates, wherein the movable push block plates are used for pushing the bricks, and the third fixing push plates are used for achieving hole reservation operation of thebricks on each single layer. The pallet-free off-line stacking device is good in operation stability, reliable in stacking process, high in locating precision and capable of automatically stacking thebricks into piled bricks with lifting holes.

The invention relates to a preparation method and preparation mold of an amorphous alloy-copper laminated composite material. The amorphous alloy is an amorphous alloy bar made of 41.25% of Zr, 13.75% of Ti, 12.5% of Cu, 10% of Ni and 22.5% of Be; and the copper is a red copper tube or a brass tube. The outer diameter of the bar is the same with the inner diameter of the copper tube. The preparation method comprises the following steps: under a room-temperature vacuum environment, removing oxide films on the surfaces of the amorphous alloy and the copper through the rubbing effect between the amorphous alloy and the copper; and then heating in vacuum to a temperature in the temperature range of a supercooled liquid region of the amorphous alloy, and keeping the temperature for a period of time to enable the amorphous alloy and the copper to be subjected to atomic diffusion, thus preparing the amorphous alloy-copper laminated composite material. The prepared amorphous alloy-copper laminated material has a tight connection interface between the amorphous alloy and the copper, and the interface is straight and level without any diffusion connection defect such as perforation and the like.