49results about How to "Increase the number of 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.

A cutting tool includes a tool body having proximal and distal ends and defining a central axis. The tool body includes a shank portion and a fluted portion. The shank portion may be configured to be rotatably engageable to a milling machine. The fluted portion may include a plurality of teeth disposed about a circumference thereof and being formed at a radius relative to the central axis. In one embodiment, the teeth may be divided into first and second tooth sections with the teeth in the second tooth section being formed at a reduced radius relative to the teeth in the first tooth section.

The invention provides a timing chain drive unit capable of reducing influence of tension changing, and realizing minature lightweighting of chain and increasing system quietness. In an engine timing chain drive(100), chain guiding pieces (110,14) are provided on the looseness side and the tension side of the chain (CH), and the chain guiding piece (110) on the tension side comprises a synchronizing sprocket (120) in fastening-rotation with the chain (CH) and the chain guiding piece (110) is set in synchronized rotation along with tension variation.

An angle-adjustable hinge provided with a first arm having a case portion and a second arm connected to the first arm with the case portion as to oscillate around a first axis and having a gear portion. The angle-adjustable hinge is also provided with a wedge-shaped window portion formed on the case portion of the first arm. Further, the angle-adjustable hinge is also provided with a floating wedge member, disposed as to move within the wedge-shaped window portion, having one face side as a toothed face to engage with the gear portion and another face side as a contact face to contact a wedge face on an outer side of the wedge-shaped window portion. And, the second arm is composed of a plate body, having symmetrical two gear plate portions, bent as the gear plate portions become parallel with a predetermined interval.

The invention discloses a variable pitch driving system which is used for a wind generating set. The variable pitch driving system comprises a motor and a reducer which is connected with an output shaft of the motor, wherein the reducer comprises a planet gear transmission system which is connected with the output shaft of the motor and has multistage transmission, and the output end of the planet gear transmission system is fixedly connected with blades of the wind generating set. The closed type gear transmission is adopted in the variable pitch driving system, when the planet gear transmission system is operated, the number of meshed gears is increased, stress of the meshed gears is improved, reliability of the variable pitch driving system is improved, and the service life of the variable pitch driving system is prolonged. In addition, the planet gear transmission system is adopted in the variable pitch driving system, a variable pitch bearing is removed, and the structure of the variable pitch driving system is more compact.

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.

The invention discloses a modification method for a harmonic driving involute profile. A point B serves as a point of tangency of a modification curve and a involute tooth surface. A point E serves asa point of intersection of the modification curve and an involute addendum circle. A coordinate system XOY is built with a radial OA as the abscissa axis. A coordinate system X1OY1 is built with a radial OC as the ordinate axis. After the steps of determining the coordinates of the point B and the point E in the coordinate system X1OY1 and the slope of a tangent of the involute at the point B, determining a flexible gear central point approximate movement track curvilinear equation, determining the parameter equation of the modification curve in the coordinate system X1OY1 and the like, a system of simultaneous equations is built and used for solving parameters, and the parameter equation of the modification curve in the coordinate system XOY is obtained through conversion of the coordinate system. According to the modification method, the harmonic driving involute profile is modified based on the harmonic driving kinematics theory, processing manufacturability and economy can be guaranteed, engagement performance is improved, the advantages of various harmonic tooth profiles are integrated, and the modification method can be widely applied to the technical field of harmonic gears.

An improved ratchet double offset ring wrench has a handle with a hand at its one end. THe head has a slot for setting a ratchet wheel, and there is one holding trough for arranging a ratchet block which is pushed elastically to mesh with the ratchet wheel normally. There is a spacing between the center of the head and the central line of the handle, and the head has a bulged part at one side of the central line. The present invention has easy-to-identify driving direction of the ratchet machanism, and the ratchet mechanism can bear relatively high twisting force.

The invention relates to an electronic device which comprises a first casing, a second casing, a plurality of assembly pieces and a plurality of locking pieces, wherein the first casing is provided with at least one first combining part; the second casing is provided with at least one second combining part; each assembly piece is provided with a plurality of assembly parts and a locking part, wherein the assembly parts are combined with the second casing for fixing the assembly pieces on the second casing; and when being used for assembling the first casing and the second casing, the locking pieces penetrate through the first combining part and the second combining part correspondingly superposed and are locked in the locking parts.

The invention discloses a jaw breaker with a tooth profile self modification breaking pair. The breaking pair comprises a fixed jaw board which is fixedly connected with a frame and a movable jaw board which is fixedly connected with a movable jaw; an upper end of the movable jaw is pivoted to a driving shaft, a lower end of the movable jaw is pivoted to a bracket, the driving shaft which is arranged on the frame is connected with a driving wheel, and the bracket is pivoted to the frame; the fixed jaw board and the movable jaw board are respectively provided with a substrate, the substrate isprovided with tooth bumps and tooth grooves, and the tooth bumps and the tooth grooves of the fixed jaw board and the movable jaw board of the breaking pair are arranged in a relative interlace mode;and through holes which are arranged in the tooth grooves which penetrate through the substrate are arranged in a lengthwise mode relative to the length direction of the tooth bumps on the opposite substrate. Biggest bright spots of the jaw breaker are that: the tooth grooves and the tooth bumps are alternately worn, wearing is on both of the tooth grooves and the tooth bumps simultaneously, so good tooth profiles are always kept, thereby the jaw breaker is always in an optimal state.

The invention discloses an external horizontal sealing upper-and-down cutter device for a candy wrapping machine. The device comprises a horizontal sealing upper seat, a horizontal sealing lower seat, horizontal sealing upper-and-down cutters, transmission gears and conducting rings; two horizontal sealing upper-and-down cutters are respectively arranged at the same sides of the horizontal sealing upper seat and the horizontal sealing lower seat by transmission shafts; the horizontal sealing upper seat is arranged at the upper part of the horizontal sealing lower seat by a connecting shaft; two transmission gears are respectively arranged at the other sides of the horizontal sealing upper seat and the horizontal sealing lower seat; the transmission gears are arranged on the transmission shafts; and two conducting rings are respectively arranged at the positions on the horizontal sealing upper seat and the horizontal sealing lower seat, which are at the same sides with the transmission gears. According to the invention, the horizontal sealing upper-and-down cutters are arranged externally, so that the complex process of internal assembling is avoided; the sizes of the horizontal sealing upper-and-down cutters and the number of cutter teeth on the horizontal sealing upper-and-down cutters are increased, so that the rotating speed of the machine can be reduced when the production speed is not reduced, and thus, service life of the horizontal sealing upper-and-down cutters and the conducting rings is prolonged; and the horizontal sealing upper-and-down cutters are arranged externally, so that difficulty in repair is also reduced.