1182 results about "Reduction ratio" patented technology

The present invention provides a reduction mechanism in which high torque output can he achieved, thinness and size and weight reduction can be achieved, and the number of teeth of a gear and reduction ratio can be freely set. In a gear motor that includes a reduction mechanism in which a planetary two-stage gear is arrayed between a sun gear of a planetary gear mechanism and an internal gear of a planetary gear mechanism, the reduction mechanism has at least a single planetary two-stage gear arrayed such as to be positioned between the sun gear and the internal gear and including a small gear or a large gear that meshes together with a large gear or a small gear of the planetary two-stage gear, and both end portions of the at least a single planetary two-stage gear are supported by ball bearings.

A power tool includes a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The power tool includes a signal generator and a control system electrically coupled to the signal generator and operatively engaged with the gear transmission mechanism such that when the signal generator is manually activated, an electric signal is generated and transmitted to the control system to cause the gear transmission mechanism to vary the gear reduction ratio.

The invention provides a method for preparing a non-oriented silicon steel with high magnetic induction, which comprises the following steps: 1) smelting and casting, wherein the non-oriented silicon steel comprises the following chemical components by weight percentage: 0.1-1% of Si, 0.005-1% of Al, less than or equal to 0.004% of C, 0.10-1.50% of Mn, less than or equal to 0.2% of P, less than or equal to 0.005% of S, less than or equal to 0.002% of N, less than or equal to 0.006% of Nb+V+Ti and the balance of Fe, steel-making, secondary refining and casting to casting blank; 2) hot rolling,wherein the heating temperature is 1150 DEG C-1200 DEG C, the finishing temperature is 830-900 DEG C, reeling at the temperature of greater than or equal to 570 DEG C; 3) flattening, cold rolling with reduction ratio of 2-5%; 4) normalizing, wherein the temperature is not less than 950 DEG C, insulating for 30-180s; 5) pickling and cold rolling, wherein the cold rolling with accumulated reductionratio of 70-80% is carried out after pickling; 6) annealing, heating to the temperature of 800-1000 DEG C with speed of greater than or equal to 100 DEG C, insulating for 5s-60s, slow cooling to the temperature of 600-750 DEG C with speed of 3-15 DEG C / s. Under the prerequisite that the iron loss is ensured, at least 200 gauss of the non-oriented silicon steel magnetic induction can be increased.

A rotating speed of the motor 4 is reduced at a high reduction ratio by using a reduction gear (the first and the second reduction gear), and the unlatch mechanism for conducting unlatch operation of the door lock 1 and the closer mechanism for conducting closer operation of the door lock 1 are separated from each other by the normal and the reverse rotating direction of the second reduction gear. Due to the foregoing, even in the middle of a closing operation conducted by the reverse rotation of the second reduction gear, when the closing operation is stopped and then the motor 4 is normally rotated, it is possible to switch from the stopping position of the closing operation to unlatch operation.

An epicyclic gear train includes a carrier that supports star gears that mesh with a sun gear. A ring gear surrounds and meshes with the star gears. Each of the star gears is supported on a respective journal bearing. Each journal bearing includes an internal central cavity and at least one passage that extends radially from the internal cavity to a peripheral journal surface of the respective journal bearing. The epicyclic gear train has a gear reduction ratio of greater than or equal to about 2.3.