114results about How to "Guaranteed to be firm" patented technology

The invention provides a high-reliability high-stability multi-rotor-wing unmanned aerial vehicle with a quick-dismounting function. In order to quickly dismount the unmanned aerial vehicle, the central disc and arms of the unmanned aerial vehicle are split, fan-shaped plates with central angles of more than 180 degrees are arranged on the end surfaces of arm inner parts in arm connecting structures to serve as first limiting convex grooves, fan-shaped plates with central angles of less than 180 degrees are arranged on the end surfaces of central disc inner parts in the arm connecting structures to serve as second limiting convex grooves, and each first limiting convex groove and each second limiting convex groove are clamped together to form a round plate anti-twist structure; meanwhile, in order to prevent twisting of each anti-twist structure, two column positions are added in each connecting structure to reinforce the anti-twist effect, and the arm inner parts are integrally and fixedly connected with the central disc inner parts through thread suites on the outer sides of the formed anti-twist structures, so that the firmness of the unmanned aerial vehicle during flight is guaranteed and the anti-twist function of the arms is improved. The unmanned aerial vehicle has the advantages of simple structure, and has the advantages of quickness for dismounting and convenience for connecting and mounting; especially, the firmness and rigidity of connection are guaranteed, and the flight reliability and stability of the unmanned aerial vehicle are greatly improved.

The invention discloses a mechanical hand truss which comprises a fixing base, a vertical fixing frame and a lifting fixing base. The left side of the lifting fixing base is provided with a lead screwfixing base, a lead screw is arranged in the lead screw fixing base, the lead screw and the lead screw fixing base are connected through threads, the upper end of the lead screw is provided with a bearing pedestal, the left end of the bearing pedestal is fixed to the vertical fixing frame, and the lower end of the lead screw is provided with a first motor. The truss is used for installing a mechanical hand. When the truss is in use, the mechanical hand is installed at the lower end of a mechanical hand fixing device and is operated through the first motor to drive the lead screw to rotate, sothat the lead screw fixing base is driven to ascend and descend. Since the lead screw fixing base and the lifting fixing base are fixedly connected, ascending and descending of the lifting fixing base are achieved, and the lifting fixing base drives a supporting transverse frame to move up and down. A second motor drives a driven wheel to rotate, so that a sliding fixing base can move left and right on the supporting transverse frame, and therefore the mechanical hand can be conveniently moved in the working process.

The invention discloses a waterproof proximity switch fixing device which structurally comprises a proximity switch body. A fixing base plate and a slide rail are sequentially disposed at the bottom of the proximity switch body. The proximity switch body is connected with the fixing base plate through bolts. Two ends of the fixing base plate are respectively provided with two adjusting holes. An elliptical bolt is disposed in each adjusting hole. The free end of each elliptical bolt is connected with the slide rail. The waterproof proximity switch fixing device has the advantages that the proximity switch body can be well fixed, flexible position adjusting and the proximity switch body and position detecting accuracy can be guaranteed, and equipment malfunction caused by error signals is avoided.