242results about How to "Eliminate torque" patented technology

An implant for fracture fixation having external portion shaped to be externally engaged on and secured to a stable bone fragment on one side of a bone fracture and an integral internal portion sized and shaped for being inserted into and accommodated in an intramedullary canal of an unstable bone fragment on an opposite side of the fracture. The internal portion has an end with a rounded tip of bullet-shape for fitting in an apical space at an endosteal surface of the unstable bone fragment to provide a bearing support for the unstable bone fragment over a large area.

The invention relates to a 3D (three-dimensional) printing system structure. The 3D (three-dimensional) printing system structure comprises a lifting printing platform, a dual-screw dual-optical-axis Z-shaft driving mechanism, an X-shaft drive mechanism, a Y-shaft drive mechanism as well as a stationary object carrying platform, wherein the printing platform is provided with an X-shaft drive motor and a Y-shaft drive motor; the two motors are respectively connected to a pair of driven bearings by synchronous belts at two ends of the driving shaft; double slide shafts in the X direction and the Y direction are both provided with slide seats; two pairs of slide seats are respectively connected by an X cross beam and a Y cross beam, and the two cross beams respectively penetrate through a 3D printer head; a driving motor of the dual-screw dual-optical-axis driving mechanism and the driving shaft are connected by the synchronous belt; the position of the driving motor can be adjusted randomly. The X-shaft drive mechanism, the Y-shaft drive mechanism and the driving shaft operate individually, so that the motion modulation is reduced; the dual-screw dual-optical-axis driving mechanism has favorable stability, so that the printing platform is stressed in a balance manner; the driving in each direction is stable; the 3D printing precision is improved.

The present invention includes an electric distributed propulsion for anti-torque modules for a helicopter and methods of use comprising: two or more generators connected to a main gearbox transmission; at least a first and a second plurality of variable speed motors connected to one or more fixed pitch blades to provide anti-torque thrust connected to the two or more generators, and at least a first and a second yaw control computer independently connected to each of the at least first and second plurality of variable speed motors, wherein each of the first and second yaw control computer serves as a primary and a backup yaw control computer to provide redundant control to both the first and second plurality of variable speed motors.

The invention relates to a foldable Y-shaped aircraft with three shafts and two-layered six rotor wings, which overcomes the defects of existing aircrafts with multiple rotor wings that opposite torque forces that are generated by corresponding positive and negative rotor wing groups counteract with each other through a supporting arm, as the supporting arm has a certain length and large structural weight loss, the torque moment counteracting effect is limited, and as the single-layered rotor wings are positioned on a same horizontal plane, the aircraft has limited motion power. The structure of the foldable Y-shaped aircraft with three shafts and two-layered six rotor wings consists of a main body, three groups of electric motor installation hood, three groups of supporting arms that connect the electric motor installation hood and the main body, three groups of rotor wings and a plurality of fasteners; each group of rotor wings has two rotor wings that are respectively arranged at an upper top end and a lower top end of the electric motor installation hood and are the positive and negative rotor wings which have the same geometrical shape and the opposite rotary direction. As the upper and lower two rotor wings of each rotor wing group are the positive and negative rotor wings that have the same geometrical shape and the opposite rotary direction, the torque forces generated by the rotation of the upper and lower rotor wings can counteract with each other, thus realizing the self-equilibrium during the movement of the aircraft, and the foldable Y-shaped aircraft has simple structure and better flexibility and stationarity, can be folded and is convenient for carry and transportation.

This invention relates to a mounting system (1) inserted between an aircraft engine and a rigid structure of an attachment strut, the system particularly comprising a thrust resistance device (20). The thrust resistance device (20) comprises two lateral actuators (30) each provided with a rod (34) in which a forward end (34b) is a piston located inside a chamber (38) of a central casing (22) of the engine, the chamber (38) comprising a forward compartment (40) and an aft compartment (42). Moreover, the thrust resistance device (20) comprises a device (32) including a piston (48) fixed to the forward mount (16) and located inside a chamber (50) fixed to the central casing, the chamber (50) comprising a forward compartment (52) and an aft compartment (54), the forward compartment (52) of the chamber (50) being hydraulically connected to the aft compartments (42) of the actuators (30).

The invention discloses a tunnel lining detection support with a height and an angle capable of being automatically adjusted, which comprises a radar bracket, wherein the axle center position of the lower side of the radar bracket is provided with a main support rod, one end of the main support rod is connected with the radar bracket through a universal joint, the other end of the main support rod is arranged on a fixed base through a universal joint, the downside of the main support rod is fixed on the fixed base through at least three air struts uniformly distributed around the main support rod, the two ends of the air struts are respectively connected with the main support rod and the fixed base through universal joints, the upside of the main support rod is connected with the radar bracket through at least three spring support rods uniformly distributed around the main support rod, and the two ends of the spring support rods are respectively connected with the bottom of the radar bracket and the main support rod through universal joints. The tunnel lining detection support disclosed by the invention is simple in structure, easy to disassemble, and convenient to carry; the tunnel lining detection support can guarantee that a preset distance is always kept between a radar antenna and a tunnel lining surface in the horizontal and vertical directions; and due to the automatic height and angle adjustment function, the influence of road unevenness on detecting results is reduced, the erection of temporary operating supports and the manual lifting are avoided, the working intensity of detection is lowered, and the detection speed is improved.

A rotating power connector for an electric welding torch unicable includes a generally cylindrical outer housing having a longitudinal axis. A connector pin is fixedly, axially disposed within the outer housing and extends from one end thereof. A rotating stud is rotatably, axially disposed within the outer housing and extends from another end thereof. The connector pin and the rotating stud have ends in contact within the outer housing. A secondary electrical contact ring also is disposed within the outer housing. The secondary electrical contact ring includes at least one contact portion contacting the rotating stud. At least one biasing member is disposed between the rotating stud and the contact ring. The biasing member urges the rotating stud into engagement with the connector pin and urges the contact ring into engagement with the rotating stud.

A back-tension archery release includes a handle with an adjustable sear housing and an adjustable finger. The handle has a longitudinal axis. The sear housing is adjustable about an axis normal to the longitudinal axis to eliminate twist or torque in a bowstring loop connected with the release. The finger is adjustable about the longitudinal axis to increase or decrease the speed of the release and provide an improved ergonomic feel to the user. In addition, the finger is removable from the handle so that differently configured fingers may be substituted by the user.

The invention discloses a non-radiative multi-component composite tungsten negative material for a microwave oven magnetron and a preparation process of the negative material. The tungsten cathode material comprises lanthanum oxide, zirconium oxide, yttrium oxide, lutetium oxide, rhenium and tungsten, wherein the mass percent of each rare-earth oxide in the tungsten electrode material is 0.5%-1.5%, the mass percent of the total rare-earth oxides in the tungsten electrode is 2%-3%, the mass percent of the alloy element rhenium in the tungsten electrode material is 1%-4%, and the tungsten accounts for the rest mass percent. The tungsten cathode material is non-radiative, excellent in thermal emission performance, excellent in high-temperature creep resistance, thermal shock resistance and sag resistance, and long in service life. The preparation method of the non-radiative multi-component composite tungsten cathode material for the microwave oven magnetron comprises the steps of solution preparation, drying, reducing, isostatic cool pressing, sintering, incipient fusion, medium-frequency induction annealing, press working, winding and mechanical straightening. The non-radiative multi-component composite tungsten negative material for the microwave oven magnetron is better in usability. When heated periodically for a long time at a high temperature, the multi-component composite tungsten wire produced by virtue of the process is capable of going through large deformational resistance, and has the sag resistance.

When a gear stage selected by the gear transmission mechanism of a first drive train or a second drive train is switched to a gear stage of a gear transmission mechanism of the other drive train, deceleration in the rotational speed of the engine detected by a rotational speed sensor is compared with a preset upper limit. If the upper limit is exceeded, a motor generator connected to the input shaft of the second drive train is started as an electric motor, and a load torque is generated to cancel the torque input from the engine to said input shaft, and in this state the gear stage of the gear transmission mechanism of said other drive train is disengaged.

The invention discloses a test piece of a concrete direct tensile test, a test piece forming die and integrated equipment. According to the invention, the test piece of the concrete direct tensile test, the test piece forming die of the concrete direct tensile test and the integrated equipment of the concrete direct tensile test are provided; the test piece of the concrete direct tensile test is a square-cross section equal thickness dumbbell-type tension test piece; the test piece forming die of the concrete direct tensile test comprises a side mold framework and a base plate, the side mold framework is formed by performing butt joint on two linked side plates; and the integrated equipment of the concrete direct tensile test comprises a loading framework, a loading mechanism, a test piece tensioning clamper, a test piece deformation test clamp and a data acquisition system. The Test piece of concrete direct tensile test, the test piece forming die and the integrated equipment have the advantages of reasonable design, simple structure, environmental protection, high efficiency and accurate testing.

Tissue spacer implants, surgical distraction instruments, surgical insertion tools, coupling devices, surgical kits, surgical methods for distraction, and methods for coupling bodies are disclosed. The tissue spacer implants include a first end member, a second end member, and an intermediate spacer member having a coupling mechanism adapted to couple the first end member with the intermediate spacer member and to couple the second end member with the intermediate spacer member. The surgical instruments may be used for inserting these implants and include a first elongated member, a second elongated member, a distraction mechanism, and an actuator. The coupling devices may be used to couple the components of the implants.

Tissue spacer implants, surgical distraction instruments, surgical insertion tools, coupling devices, surgical kits, surgical methods for distraction, and methods for coupling bodies are disclosed. The tissue spacer implants include a first end member, a second end member, and an intermediate spacer member having a coupling mechanism adapted to couple the first end member with the intermediate spacer member and to couple the second end member with the intermediate spacer member. The surgical instruments may be used for inserting these implants and include a first elongated member, a second elongated member, a distraction mechanism, and an actuator. The coupling devices may be used to couple the components of the implants.

An apparatus and method for managing bending and other applied forces that are exerted on a filament of thermoplastic with reinforcing fibers in a 3D printing system during the deposition process that is associated with the manufacturing of an object. The quality of the manufactured object is enhanced through a process that comprises i) applying torque to certain portions of the solid filament in a manner that is commensurate with the expected motions of the deposition head while depositing those portions, but only after ii) heating each portion to a sufficient temperature. A heating device and a twisting device act on the filament while it is moving toward the deposition point and while under the control of a controller that is operating according to a computer model of the object being manufactured.

The present invention pertains to a mechanically actuated dock leveler with a mounting frame secured in a pit of a loading dock, and a deck assembly with a deck and extendable lip. A deck lift assembly biases the deck to move from a parked position to a raised position to activate a lip extension assembly. As the deck is “walked down”, the lip is extended and the lip extension assembly is deactivated in a controlled manner so that the deck and lip reach an engaged position against the trailer and are kept in place by a hold down mechanism. The deck assembly has a float housing with a slot for releasably engaging the lift assembly to achieve a range of float positions where the deck and lip rest on and float with the trailer as it is loaded and unloaded. The deck assembly has a durable combined lip lug and header plate hinge construction.

The invention discloses a rudder load simulator not generating surplus torque, which belongs to the technical field of aerodynamic load simulation of an aircraft. The simulator comprises a sliding block driving motor fixed on a working table surface via a supporting table, a screw rod guide rail, a sliding block moving on the screw rod guide rail after a driving instruction of the sliding block driving motor is received, a torsion spring, an inertia disk, a speed reducer, a torque sensor, a lower computer controlling the sliding block driving motor, and an upper computer communicating with the lower computer, wherein the torsion spring is in rigid connection with the output shaft of a rudder engine room; and the torque sensor is in rigid connection with the output shaft of the rudder engine room. A loading instruction is tracked in a mode of changing the torsional rigidity of the torsion spring, and thus the surplus torque caused when the output shaft of the rudder engine room and the output shaft of a loading motor are coupled due to active rudder motion can be eliminated from the principle.

The door closer includes one rectangular casing, which has closing screws and end caps on two sides and one protecting board between two end caps, and is separated into one spring cavity, one crankshaft cavity and one pressure balancing cavity; one opening piston and one compression spring connected together inside the spring cavity; and one driving device inside the crankshaft cavity and including one driving shaft, one cam disc connected to the driving shaft, one operating arm with one end connected to the driving shaft and one sliding block connected to the other end of the operating arm and capable of shifting inside one slide rail.

This invention relates to a mounting system (1) inserted between an aircraft engine and a rigid structure of an attachment strut, the system particularly comprising a thrust resistance device (20). The thrust resistance device (20) comprises two lateral actuators (30) each provided with a rod (34) in which a forward end (34b) is a piston located inside a chamber (38) of a central casing (22) of the engine, the chamber (38) comprising a forward compartment (40) and an aft compartment (42). Moreover, the thrust resistance device (20) comprises a device (32) including a piston (48) fixed to the forward mount (16) and located inside a chamber (50) fixed to the central casing, the chamber (50) comprising a forward compartment (52) and an aft compartment (54), the forward compartment (52) of the chamber (50) being hydraulically connected to the aft compartments (42) of the actuators (30).

Disclosed is a linear motor which comprises a magnet unit, a coil unit, a magnet fixing seat and a control system. The magnet fixing seat is laterally U-shaped. The magnet unit includes a first magnet array and a second magnet array which are respectively disposed on two parallel inner walls of the magnet fixing seat. The coil unit is arranged in a magnetic gap between the two magnet arrays. The control system is used for supplying current to the coil unit. The two magnet arrays are periodically and alternately distributed along a Y direction according to a Halbach array mode. The coil unit includes a first coil array and a second coil array which is disposed along a Z direction perpendicular to the Y direction and is adjacent to the first coil array, and the two coil arrays are staggered by a certain distance delta P along the Y direction. A platform device adopting the linear motor is further disclosed. According to the invention, magnetic leakage can be reduced, greater thrust can be provided, and a double-layer coil arrangement structure is adopted to enable the linear motor to generate required three-degree-of-freedom control force or control torque.

The invention relates to a low-cogging-torque motor stator. The low-cogging-torque motor stator comprises a stator iron core and stator coils, wherein a plurality of stator teeth are distributed at intervals and extended integrally from the inner circumference of the stator iron core; pole shoes are arranged at the tail ends of the stator teeth; a stator groove is formed between the adjacent stator teeth; the stator coils are placed in the stator grooves; one or more than one steps are arranged on two sides of each pole shoe; and the steps are correspondingly matched with the steps on the adjacent pole shoe to form a bend notch. The invention also relates to an assembling method for the low-cogging-torque motor stator. The assembling method comprises the following steps of: laminating stator punching sheets with different pole shoe widths into the stator iron core; correspondingly matching the steps with the steps on the adjacent pole shoe to form the bend notch; and placing the stator coils in the stator grooves so as to finish assembly of the stator. The invention meets the basic performance of a motor and greatly reduces cogging torque.

A strut having a reversible fulcrum, which can be changed, from a left strut to a right strut, for using in brake beams of the type comprising; a compression member, a "V" shaped tension member having a central apex coupled to the ends of the compression member; a brake shoe linked to the each end of the compression member; and a strut, wherein the strut having a reversible fulcrum comprising: a fulcrum body having a first end and a second end, a central slot passing through a central portion of the fulcrum body at a side portion thereof and an off-center pinhole passing through the fulcrum body at a central portion of a front portion of the fulcrum body; a hollow bell joint, having a dome rotary coupled to a central portion of the tension member and a tubular open end at which the first end of the fulcrum body is coupled; and a crown joint having a first end including an internal annular border, rotary receiving the second end of the fulcrum body, and a second end having two opposite holding skirts to be coupled to the central apex of the tension member.

The present invention includes an electric distributed propulsion for anti-torque modules for a helicopter and methods of use comprising: two or more generators connected to a main gearbox transmission; at least a first and a second plurality of variable speed motors connected to one or more fixed pitch blades to provide anti-torque thrust connected to the two or more generators, and at least a first and a second yaw control computer independently connected to each of the at least first and second plurality of variable speed motors, wherein each of the first and second yaw control computer serves as a primary and a backup yaw control computer to provide redundant control to both the first and second plurality of variable speed motors.

The invention discloses a permanent magnetism motor V-shaped skewed pole rotor structure, comprising a rotating shaft, a web plate, a cylindrical shell and unit magnetic poles. The external surface of the cylindrical shell is circular, and is provided with dovetail slots and screwed holes in an axial direction; the unit magnetic poles are laminated by rotor punching sheets, and form two symmetrical V-shaped sections on the cylindrical shell in an axial direction; each section is assembled by a plurality of unit magnetic poles, and the unit magnetic poles are discriminated and positioned by utilizing dovetail structures. The unit magnetic poles are fixed by utilizing the dovetail structures, so that the front part of a rotor distorts on an axial side, and the back part distorts for a same angle to an opposite side. Skewed poles of two portions incline in different directions, thereby offsetting axial opposite force generated by the skewed poles, meanwhile eliminating a gullet torque, and reducing motor vibration and noise.

The present invention discloses a permanent-magnet synchronous motor using a stator of a V-shaped chute or a rotor of a V-shaped oblique pole, turning the angle of inclination along one side in the forebody of the axle, and turning the same angle of inclination along the other side in the latter part of the axle. The axial distances of the two parts are same. Due to the chute and the oblique pole of the two parts adopted different inclined directions, the additional axial forces are in reverse, so they are mutually offset on a macro level, not only the cogging torque can be removed, but also the additional pulse axial force can be removed, decreasing the noise and the vibration. The present invention also discloses a permanent-magnet synchronous motor stator and a permanent-magnet synchronous motor rotor.

This invention relates to a mounting system (1) inserted between an aircraft engine and a rigid structure of a strut, comprising a thrust resistance device (20) comprising a spreader beam (28) provided with two lateral lower ends (32a) placed such that a horizontal plane passes through them and through a longitudinal axis of the engine. Moreover, the device (20) is also fitted with two fittings (44) each comprising a forward end (44a) through which the said horizontal plane also passes and fixed to a forward part of a central casing (22), and an aft end (44b) connected to one of the ends (32a). Furthermore, the spreader beam is connected to the forward mount and to the rigid structure through its upper end (30b).

The invention discloses a steel wire rope cleaning / detection / maintenance apparatus and belongs to the field of steel wire rope detection. The steel wire rope cleaning / detection / maintenance apparatus comprises a torsion release unit for releasing the torsion of a steel wire rope, a cleaning unit for cleaning the steel wire rope, a detection unit for performing nondestructive testing on the steel wire rope and an oil immersion unit for immersing the steel wire rope in oil for maintenance, and all the units are arranged in order; the steel wire rope cleaning / detection / maintenance apparatus is capable of completing such operations as torsion release, cleaning descaling, nondestructive testing and oil immersion maintenance on the steel wire rope at one stop in a mechanical operation manner; the torsion of the steel wire rope is released through the torsion release unit; the cleaning unit functions in completing the oil removal and descaling operations on the steel wire rope; the detection unit functions in detection in a moving state of the steel wire rope; the oil immersion unit functions in completing the oil immersion operation on the steel wire rope in an oil tank, and meanwhile, squeezing out superfluous oil for recovery; in short, the steel wire rope cleaning / detection / maintenance apparatus has the advantages of environmental protection, cost saving, reduction of the working labor intensity and improvement of the working efficiency.

The invention relates to the technical field of anchor rod pre-tightening devices and discloses an anchor rod drawing device and method. The anchor rod drawing device comprises an anchor rod, a tray, a lockset and a tensioning mechanism. The anchor rod comprises an anchoring part and an unoccupied part, wherein the anchoring part is fixed into an anchor rod hole in coal and rock mass through an anchoring body, and the unoccupied part is exposed outside the anchor rod hole. The tray is mounted on an outer end port of the anchor rod hole. The lockset is mounted on the unoccupied part and presses against the outer side of the tray. The tensioning mechanism is connected with the unoccupied part, draws the anchor rod outwards and presses against the lockset. The anchor rod drawing device is simple in structure, existing tools are utilized fully, a construction method is simple and convenient to implement, and the anchor rod drawing device has the advantages that the anchor rod can be tensioned rapidly and effectively, the pre-tightening force of the anchor rod is increased, thread torque is eliminated, and combined stress concentration of the anchor rod is reduced.

A drive assembly for a progressive cavity pump includes a frame supported by the wel piping and a polish rod connected to the sucker rod. The polish rod is received by a rotary union formed by a sleeve portion rotatable with respect to a body portion with a seal structure that seals the sleeve and body portions during rotation. A mechanical drive, such as a hydraulic motor, electric motor or engine, has an output shaft that is linear with the polish rod and that has an axial passageway which receives the polish rod. A coupler mechanically couples an upper portion of the polish rod to the output shaft. The invention also includes a method of rotating a progressive cavity pump by this assembly.