音乐教学展示板

Crop straw smashing device

The utility model discloses a crop straw smashing device which comprises a discharging hopper, a smashing machine body, a bottom frame, a motor, a protective cover, an arc groove, an arc block, an arc plate, a clamping rod, an oval rod, an oval block, a rotating pin, a reset coil spring, a first magnetic block, a second magnetic block, a micro motor, a screw rod, a nut, a sliding block, a supporting plate and a rolling wheel. The elliptical block is rotated reversely, the elliptical block rotates reversely to drive the rotating pin to rotate, so that the first magnetic block is separated from the second magnetic block, the rotating pin rotates to drive the elliptical block to rotate to be attached to the arc-shaped plate under the torsion effect of the reset coil spring, and then installation of the arc-shaped plate and the clamping rod is completed, and installation of the protective cover is completed. The micro motor works to drive the screw rod to rotate, the screw rod rotates to drive ...

Waterproof structure for aluminum-wood composite door and window

The utility model discloses a waterproof structure for aluminum wood composite doors and windows, which comprises a solid wood frame body, one side of the solid wood frame body is fixedly connected with an outer wrapping aluminum frame body, and transparent glass is connected in the outer wrapping aluminum frame body and the solid wood frame body. The utility model relates to the technical field of aluminum-wood composite doors and windows, the drain holes are matched with the drain cavities, so that water on transparent glass can be quickly drained through the drain cavities in cloudy and rainy days, the rubber strips are matched, water accumulation in the drain cavities is avoided, water accumulation near the aluminum-wood composite doors and windows is avoided through quick and efficient drainage, and the service life of the aluminum-wood composite doors and windows is prolonged. Therefore, the waterproof effect of the aluminum-wood composite door and window is greatly improved, and ...

Wind wheel blade erecting device for wind power generation

The utility model relates to the technical field of wind turbine blade erection, and discloses a wind turbine blade erection device for wind power generation, which comprises a bottom plate, and a fixing rod is fixedly connected to the top of the bottom plate and located at the left middle position. According to the wind turbine blade erecting device for wind power generation, a second rotating motor drives a rotating shaft to rotate, the rotating shaft drives a first moving block to move downwards, the rotating shaft drives a second moving block to move upwards, and the first moving block and the second moving block clamp wind turbine blades, so that the stability of the clamping device is improved, and the damage probability of the wind turbine blades is reduced; the clamping device is used for clamping the wind wheel blade, the first forward and reverse motor is started to drive the first rotating wheel to rotate, the first rotating wheel drives the first driven wheel to rotate, the ...

Aluminum-wood composite door and window connecting piece

The utility model relates to an aluminum-wood composite door and window connecting piece which comprises a main plate and an inserting groove. A rotating shaft is fixed to the upper portion of the main plate, an auxiliary plate is connected to the upper portion of the rotating shaft, the auxiliary plate is movably connected with the rotating shaft, the inserting groove is formed in the auxiliary plate, a sliding groove is formed in the main plate, an inserting plate is arranged in the sliding groove, the sliding groove is movably connected with the inserting plate, and a rail ring is welded to the right side of the main plate. A breaking rod is fixed to the left side of the main plate, the track ring is movably connected with the auxiliary plate, an overlapping ring is fixed to the front end of the rotating shaft, and a track is formed in the overlapping ring. The aluminum-wood composite door and window connecting piece relates to the technical field of building construction, due to the ...