6results about How to "Flexible selection" patented technology

This utility model relates to the field of grinding wheel switching technology and discloses a multifunctional grinding machine device for rapid grinding wheel switching. It includes a worktable with a support mounted on it. A ring is mounted on the upper end of the support, a turntable is positioned on the front side of the ring, and a retaining ring is mounted on the rear side of the turntable. Through design, the ring on the support and the retaining ring on the rear side of the turntable are rotated and engaged. When changing grinding wheels of different specifications, the first bolt on the L-shaped support arm is loosened, the turntable is rotated to move the required grinding wheel to the working position, and the turntable is then re-fixed, thus quickly completing the grinding wheel adjustment. During grinding, the motor drives the drive gear to rotate, meshing with the driven gear in the working position, thereby driving the corresponding grinding wheel to rotate. This design allows for the flexible selection of grinding wheels of different specifications as needed, realizing the multifunctional grinding capability of the equipment. Furthermore, the grinding wheels are connected via a sleeve, a rotating shaft, and a second bolt, allowing for quick disassembly and replacement when a single grinding wheel wears out.

The invention discloses a small-size high-efficiency large-current lithium battery active equalization circuit and a control method thereof, the small-size high-efficiency large-current lithium battery active equalization circuit comprises active equalization modules which are connected in parallel between two connected battery cells, and each active equalization module is composed of four switching tubes and a group of resonance branch circuit which is formed by connecting an inductor and a capacitor in series; n-1 active equalization modules are needed for a battery pack composed of N battery cells. The LC series branch serves as an energy temporary storage unit to replace a traditional inductance type single inductor or capacitance type multiple capacitors, the number of elements is reduced, meanwhile, low-loss energy transfer is achieved through resonance characteristics, and the equalization scheme has the advantages of being small in size, large in equalization current, small in equalization energy loss between battery cells, high in efficiency and the like.

This invention discloses an azeotropic phase change cooling rotor assembly, a Roots compressor, and a vacuum pump. The rotor assembly includes a main rotor with circumferentially shaped through-holes and an axially oriented internal through-hole on the rotor shaft. A first and a second auxiliary rotor are mounted at both ends of the main rotor. Rotor sealing plates are arranged on the inner sides of the two auxiliary rotors to seal the shaped through-holes and form a first azeotropic flow region. One end of the rotor shaft is connected to a drive motor, and the other end connects to a swirl cooling pipe with swirl fins on its outer wall, forming a second azeotropic flow region through end sealing. The first and second azeotropic flow regions are filled with an azeotropic phase change cooling medium. This invention is based on the azeotropic phase change heat transfer principle and combines a swirl cooling structure to achieve efficient heat dissipation. The overall structure is simple and compact, eliminating the need for complex cooling equipment, effectively suppressing rotor temperature rise during operation, and avoiding rotor jamming caused by high-temperature thermal expansion.

The utility model discloses a high -efficient cordless electric drill motor relates to cordless electric drill technical field, the utility model discloses a cordless electric drill body, the bottom fixedly connected with battery box of cordless electric drill body handheld handle, the chuck of cordless electric drill body front end is fixed with drill bit, and the lower portion of drill bit is provided with the chip collecting cover, and the chip collecting cover swing sleeve is connected on the guide rod, and the guide rod is provided with two, and the rear end of two guide rods is all fixed on cordless electric drill body, and the spring sleeve is connected on cordless electric drill body, and the bottom of the front end of chip collecting cover is provided with the chip collecting cylinder, and the inside communication of chip collecting cylinder is passed through the chip guide hole and chip collecting cover, and the lower end screw joint of chip collecting cylinder has the cylinder cover. The utility model discloses the chip collecting cover of setting, can catch the drill cutting produced in the drilling process of drill bit, and will drill cutting through the chip guide hole and import the chip collecting cylinder in the collection, prevents the drill cutting from falling at random, and personnel need not utilize bag and so on and catch the drill cutting produced, is more convenient.

This invention discloses a modular radiation-hardened power supply based on reconfigurable technology, relating to the field of switching power supply circuit technology. The power supply is composed of physically independent power supply module units, signal module units, primary power module units, secondary power module units, and magnetic component units, which are then deconstructed and interconnected. The power supply module units are responsible for supplying power to the control and drive circuits; the signal module units act as the control center, outputting drive signals and performing synchronous rectification control; the primary and secondary power module units are respectively connected to the primary and secondary sides of the magnetic component units to form a power conversion circuit. This invention, through standardized modular design and differentiated packaging processes, solves the problems of long development cycles, poor flexibility, and difficult heat dissipation under high current in traditional radiation-hardened power supplies, aiming to provide a highly reliable and easily reconfigurable power supply solution.