71results about How to "Few teeth" patented technology

The invention relates to a direct inclination control rotor helicopter and belongs to the technical field of helicopters. A rotor inclination controller as the key technology of the invention is a transmission system mutually hinged by a rotor shaft on the helicopter, two pairs of bevel gears mutually and vertically engaged on a horizontal axis and a vertical axis, can direct operate the inclination of the helicopter rotor, and save a blade periodic diameter changing system, a speed reducer and a tail rotor system on the traditional helicopter, thus the structure of the helicopter is simplified, the difficulty in design and manufacture is lowered, the cost is reduced, the security, the reliability and the service life is prolonged, the helicopter is easy to operate and maintain, and the vibration and the noise intensity are weakened. The direct inclination control rotor helicopter is suitable for single(multiple)-rotor helicopters, coaxial dual-propeller helicopters, thrust high-speed helicopters, helicopter-rotors, unmanned planes and related aircrafts and mechanical devices in other forms.

The invention relates to a processing method of an involute of a gear with large module and a few teeth. The method includes forging process; semi-finish turning processing: processing is performed on a lathe, and inner holes, addendum circles and datum end faces are finished during one clamping; hobbing processing: a standard hob is adopted for the hobbing processing, and a gear grinding allowance in a common normal line is provided; rough gear grinding processing: the whole gear is processed out according to dimensions, corresponding deep arcs are processed at tooth roots according to the common normal line allowance, and the diameter of a starting circle of the involute is measured; carburization quenching processing: carburization quenching is performed on teeth surfaces, non-seeping surfaces are subjected to coating protection; finish turning processing: processing is performed on the lathe, and the datum end faces and the inner holes are finished during one clamping; and gear grinding processing : gear grinding is performed on a gear grinding machine, and the diameter of the starting circle of the involute is measured. The processing method is simple, low in production cost and suitable for processing gears with large module, a few teeth and large negative addendum modification.

An acetabular reamer (10′) for cutting a required cut shape. The reamer has a cutting shell (12′) having a series of doubly curved cutting teeth (16′) thereon of a quantity to substantially reduce a cutting pressure on each tooth as well as to reduce a size of a typical chip generated upon cutting. Substantially all the teeth each have a matched arc cutting edge (20′) of substantial length that has a cutting profile which substantially matches a profile of a shape to be cut. Such a configuration reduces the number of teeth required to cut the shape.

The invention relates to an inner and outer tooth form meshing gear reducer comprising a first-level reducing mechanism and a second-level reducing mechanism. The first-level reducing mechanism comprises an eccentric wheel (101), a first turning bearing(5), an outer-meshing curve wheel (7) and a gear pin (8); the gear pin is fixed on a first support (9) and externally meshes with the outer-meshing curve wheel (7). The second-level reducing mechanism comprises an eccentric driving wheel (14), a second turning bearing (13) sleeved on the eccentric driving wheel (14), an outer-meshing curve wheel (11), and an output plate (16) in linkage with an output shaft (20). The outer-meshing curve wheel (11) is sleeved on the second turning bearing (13) and internally meshes with the gear pin (8). The eccentric driving wheel (14) is in linkage with the outer-meshing curve wheel (7) through a pin (6), and the outer-meshing curve wheel (11) is in linkage with the output plate (16) through a driving pin (12). The inner and outer tooth form meshing gear reducer has the advantages of few tooth numbers, high speed ratio, small size, high load bearing, high efficiency and long service life, and is especially applicable to reducers by industrial robots.

The invention relates to a rigid inside and outside tooth-profile-wrapped tooth reducer which comprises a first level reducing mechanism and a second level reducing mechanism. The first level reducing mechanism comprises an eccentric wheel (101), a first turning arm bearing (5), an outer meshing curve wheel (7) and a gear pin (8), wherein the gear pin (8) is fixed on a first support (9) and is meshed with the outer meshing curve wheel (7) in an external mode. The second level reducing mechanism comprises an eccentric driving wheel (14), a second turning arm bearing (13), an inner meshing curve wheel (11) and an output disc (16), wherein the inner meshing curve wheel (11) is meshed and matched with the gear pin (8) in an internal mode, the output disc (16) is connected with an output shaft (20) of the output disc (16) in a linkage mode, the eccentric driving wheel (14) is connected with the outer meshing curve wheel (7) in a transmission mode through a pin (26), the inner meshing curve wheel (11) is connected with the output disc (16) in a transmission mode through a transmission pin (24), one side of the outer meshing curve wheel (7) is provided with a first reinforcing bracket (6), and one side of the inner meshing curve wheel (11) is further provided with a second reinforcing bracket (23). The rigid inside and outside tooth-profile-wrapped tooth reducer has the advantages of being small in the number of teeth, large in speed ratio, small in size, high in bearing and efficiency, long in service life, high in rigidity, and particularly suitable for a reducer for a heavy-load robot.

A can opener has a cutter blade mounted with a body and a traction wheel mounted with the body on or adjacent the cutter blade. One of the cutter blade or traction wheel is movable with respect to the other between an inoperative position and an operative position. In the inoperative position the traction wheel and the cutter blade are spaced apart so that a rim of a can to be opened may be located between the traction wheel and the cutter blade. In the operative position the traction wheel and the cutter blade engage a can for opening the can. The can opener has an operating element that is operable by a user of the can opener for turning the traction wheel. Operation of the operating element also moves the cutter blade and traction wheel from the inoperative position to the operative position.

The invention discloses a hub of an electric bicycle, comprising a main shaft fixed on a frame. The main shaft is provided with a hub shell by a hub shell bearing; a motor, a planet wheel reducing mechanism and a clutch are arranged in the hub shell; the motor adopts a structure with an inner stator and an outer rotor; a sun gear sleeved on the main shaft is fixed on the rotor; the sun gear is meshed with a planet gear; the planet gear is meshed with a hub inner gear ring fixed on the hub shell; the planet gear is arranged on a planet shaft by a planet bearing; the planet shaft is fixed on the clutch; and the clutch and the frame are fixed with each other. Compared with the prior art, the torsion of the clutch in work is borne by using the frame, the torque force borne by the main shaft is greatly reduced, and thereby, the main shaft is made thin to reduce the tooth number of the sun gear under the premise of ensuring the strength of the main shaft to achieve the goals of increasing the reduction ratio of the sun gear to the hub inner gear ring, further increasing the output torque of the main shaft and reducing the volume of the hub.