4results about How to "Guaranteed driving force" patented technology

The invention discloses a tailstock type vertical take-off and landing aircraft with foldable outer-section wings and a design method of the tailstock type vertical take-off and landing aircraft, the outer-section wings can be folded and unfolded by matching a folding and unfolding driving mechanism with a four-bar mechanism, and the weight brought by a folding device is reduced on the premise of ensuring driving force and maintainability; when the wings are completely folded, the aircraft is in a four-rotor state, and when the wings are completely unfolded, the aircraft is in a fixed-wing state; the folding and unfolding of the wings give consideration to the conversion of the flight form, and the folding of the outer-section wings is realized on the premise of ensuring the reasonable gravity center and inertia of the fixed wing state and the rotor wing state at each folding and unfolding angle through the reasonable configuration of the gravity center of each shaft of the vertical take-off and landing aircraft, so that the space cost of the aircraft is reduced.

An electromagnetic system and a switching device, the electromagnetic system comprises a coil assembly, a static core and a moving core, the coil assembly comprises a coil framework and a coil wound outside the coil framework, the static core is fixedly arranged on the coil framework and arranged along the outside of the coil assembly, the moving core slides through the central hole of the coil framework and leaves at least two magnetic gaps between the static core, the moving core is also connected with a linkage, the linkage slides through the central hole, and both ends of the linkage extend to the outside of the both ends of the central hole as driving parts respectively. In the utility model, there are at least two magnetic gaps between the static core and the moving core, the driving force of the moving core is guaranteed, the design that the linkage penetrates the central hole makes that both ends of the linkage can be used for driving the contact system, and the electromagnetic system can drive more contact systems simultaneously.

The application discloses a fastener driving tool and belongs to the technical field of electric tools. The fastener driving tool comprises a supporting cylinder, a striking unit with a driving piston and a striking piece, a driving air chamber in fluid communication with a displacement volume, a lifting assembly for driving the striking unit to move in a first direction, and a gas supplementing unit arranged in the supporting cylinder. The gas supplementing unit comprises a gas supplementing piston and a gas supplementing air chamber. In the process that the striking unit moves in a second direction, the volume of the gas supplementing air chamber is reduced, and the gas in the gas supplementing air chamber can enter the driving air chamber. In the process that the striking unit moves in the first direction, the volume of the gas supplementing air chamber is increased, and external air can enter the gas supplementing air chamber. The gas supplementing unit is additionally arranged to supplement the gas in the driving air chamber, which is beneficial to guarantee the driving effect.

An electromagnetic operating system and switch device, including a coil frame and a magnetic yoke, the coil frame is provided with two spaced opposite magnets, the middle part of the coil frame is slidably assembled with a moving iron core, the magnetic yoke surrounds the outside of the coil frame, the middle part of the coil frame is wound with two coils, and the two coils are distributed along the axial direction of the coil frame for driving the moving iron core to move between a first position and a second position, and the drive rod connected to the moving iron core has at least one end penetrating through the magnetic yoke and extending out of the coil frame. In the utility model, two coils are arranged on the coil frame, the moving iron core is driven to move between the first position and the second position through the two coils, and the utility model has the advantages of simple driving process, high reliability and low cost.