60results about How to "Reduce load torque" patented technology

A drive transmission mechanism for transmitting torque between two or more rotary shafts in synchronization with one another without need for lubrication thereby eliminating occurrence of oil contamination, and an oil-free fluid machine equipped with the mechanism, are provided. A magnetic drive disk 16 and a synchronization gear 18 are attached to a rotary shaft 14 connected to a drive motor 11, a magnetic drive disk 17 and a synchronization gear 19 is attached to a rotary shaft 15, torque transmission from the rotary shaft 14 to the rotary shaft 15 is carried out in two ways, via the magnetic drive disks 16, 17 and via the synchronization gears 18, 19, and at least one of the synchronization gears is made of plastic material. With the construction, torque transmit load between the rotary shafts via the synchronization gears is decreased, and a plastic gear or gears can be adopted for synchronization gears without reducing life of the gears without need for lubrication oil.

The present invention relates to a power generation control apparatus for a hybrid vehicle. The hybrid vehicle comprises an engine which outputs a driving force for the hybrid vehicle; a motor which outputs an assistant driving force so as to assist the driving force of the engine; a power storage unit; and a power generation control apparatus which controls the power generation by the motor. The power generation control apparatus comprises a load torque calculation device which calculates the load torque to be applied to an engine of the hybrid vehicle for generating electrical power used in the hybrid vehicle when the engine is idling; a generable torque calculation device which calculates torque generable by the engine when the engine is idling; and a power generation load torque determination device which determines a limiting value of a power generation load torque to be applied to the engine in accordance with the load torque calculated by the load torque calculation device and the generable torque calculated by the generable torque calculation device.

The invention provides a seven-degree-of-freedom series-parallel hybrid mechanical arm. The seven-degree-of-freedom series-parallel hybrid mechanical arm comprises a base, a first joint, a first link,a second joint, a connection support, a third joint, a second link, a fourth joint, a fifth link, a fifth joint, a sixth joint, a sixth link, a seventh joint and an end executer connection flange which are sequentially connected, wherein a third link and a fourth link are further arranged between the third joint and the fourth joint, one end of the fourth link is connected with the fourth joint,the other end of the fourth link is connected with the third link, and the third link is connected with a motor shell body of the fourth joint; the third link, the fourth link, the fourth joint and the second link form a parallel four-link transmission mechanism; and the axis of the third joint, the axis of the fourth joint and the axis of the fifth joint are mutually parallel. The new configuration of the seven-degree-of-freedom series-parallel hybrid mechanical arm is high in operation flexibility in a common reachable range of a main movement space; and meanwhile, the load torque of the motor in the vicinity of the base is reduced, and the rotational inertia of the whole mechanical arm is reduced.

A robot controller and a robot control method, by which each element constituting a robot is protected. An output of a rotary encoder attached to a servomotor is read, and the motor speed is obtained by calculating the difference between a current speed and another speed in a previous speed loop. Then, a processor of the servo controller of each link of a robot arm executes a normal speed loop control in order to calculate a torque command of the motor. Next, a load torque is estimated by using the obtained torque command and the motor speed, and the estimated load torque in each speed loop is compared with a predetermined threshold. If the load torque is larger than the threshold in at least one of the axes, the robot controller judges that an abnormality has occurred in the robot, generates an alarm or warning, and then controls the robot so as to protect the element.

The invention provides a vehicle breaking apparatus having a hydraulic pressure source which can generate brake hydraulic pressure corresponding to a piston forward movement driven by an electric motor. The apparatus enables the electric motor small and light-weighted while the responsiveness of the brake hydraulic pressure generation is ensured. The hydraulic pressure source with BBW-type brake apparatus comprises: a slave hydraulic cylinder (42), generating brake hydraulic pressure by the forward movement of the piston (48) driven by the electric motor (44); a VSA apparatus (23), by using a pump (64), pressurizing on the brake fluid at the downstream side of the slave hydraulic cylinder (42). For the slave hydraulic cylinder (42) and the VSA apparatus (23) are selectively acted based on the operation amount of a brake pedal (12), the slave hydraulic cylinder (42) is acted when the high responsiveness of generating brake hydraulic pressure is not required, so that the miniaturization of the electric motor (44) is achieved and the VSA apparatus (23) is acted when the high responsiveness of generating brake hydraulic pressure is required, thereby ensuring the high responsiveness.

A bearing apparatus includes a rotator body, a non-rotation body rotatably supporting the rotator body, and a lubrication fluid provided between the rotator body and the non-rotation body in which the rotator body is supported in a thrust direction by a thrust dynamic pressure bearing formed between the rotator body and the non-rotation body. The bearing apparatus includes an active magnetic bearing formed by a driving coil disposed on one of the rotator body and the non-rotation body and a magnet disposed on the other thereof, and a gap sensor that detects an axial direction gap between the rotator body and the non-rotation body. The thrust dynamic pressure bearing and the active magnetic bearing are combined such that the static rigidity of the bearing apparatus is born by the active magnetic bearing and the dynamic rigidity is born by the dynamic pressure bearing.

The present invention relates to a motor control method for a dental handpiece provided with a motor that rotationally drives a cutting tool. The control method includes a step A of limiting the motor current to a first limit current I1 when the load torque applied to the cutting tool exceeds a preset limit torque value, and a step B of controlling the motor current to be equal to or lower than a second limit current, which is lower than the first limit current, when it is detected that the motor stops rotating.

Electronic pipette with a displacement device, an electric drive motor with a drive shaft, a gear mechanism coupled on the one hand to the displacement device and on the other hand to the drive shaft, a magnetic disc rotationally coupled to the drive shaft with at least one magnetic pole on the circumference, at least one magnetic sensor aligned with the circumference of the magnetic disc, at least one additional magnet aligned with the circumference of the magnetic disc, an electronic control device electrically connected to the electric drive motor and the magnetic sensor and an electric voltage supply connected to the electronic control device.

The invention provides a foreign matter removing device of roller, which can be rotarily mounted with a bidirectional scratch board, wherein only one side of the bidirectional scratch board is contacted to the roller surface regardless the rotary direction of the roller, so that the foreign matter removing device can reliably remove the foreign matter on the surface of the roller and can reduce the load torque.

A nacelle component for a nacelle of a wind turbine, comprising a mainframe module and a power electronics module. The mainframe module and the power electronics module in each case have a length greater than a width. In the assembled state of the nacelle component, the mainframe module is oriented with its longitudinal axis parallel to a vertical plane which extends through the axis of a rotor shaft. The longitudinal axis of the power electronics module intersects the vertical plane which extends through the axis of the rotor shaft. A method for mounting such a nacelle component is also disclosed.

The invention discloses a pneumatic auxiliary device for shield tunneling machine soil pressure balance. The pneumatic auxiliary device for shield tunneling machine soil pressure balance comprises anair system and a pressure maintaining system, wherein the air system is connected with a soil bin and can inject gas into the soil bin; the pressure maintaining system is used for monitoring the pressure in the soil bin and controlling the air system whether to inject gas into the soil bin; the air system comprises an air compressor, a gas storage tank and a freezing dryer; the input end of the gas storage tank is connected with the output end of the air compressor; the input end of the freezing dryer is connected with the output end of the gas storage tank; the output end of the freezing dryer communicates with the internal part of the soil bin through an air pipeline; the pressure maintaining system comprises a control valve, a pressure transmitter and a control device; the control valveis arranged on the air pipeline; the pressure transmitter is used for measuring the pressure in the soil bin; and the control device is connected with the pressure transmitter and the control valve separately and controls the control valve to open and close. The pneumatic auxiliary device can reduce load when a shield tunneling machine tunnels, force back underwater through gas pressure, guarantee synchronous grouting quality, reduce abrasion of a cutterhead and a cutter, avoid mud cake of the cutterhead and improve tunneling efficiency.

Electronic pipette with a displacement device, an electric drive motor with a drive shaft, a gear mechanism coupled on the one hand to the displacement device and on the other hand to the drive shaft, a magnetic disc rotationally coupled to the drive shaft with at least one magnetic pole on the circumference, at least one magnetic sensor aligned with the circumference of the magnetic disc, at least one additional magnet aligned with the circumference of the magnetic disc, an electronic control device electrically connected to the electric drive motor and the magnetic sensor and an electric voltage supply connected to the electronic control device.

The invention provides a bi-directional rotary pump, which can form large flow when controlling flow, and can reduce load torque exerting on the electric engine when controlling pressure, making the electric engine miniaturization and with higher efficiency than the existing bi-directional rotary pump. The volume-variable bi-directional rotary pump includes a bi-directional rotary pump mechanism, a volume-variable mechanism for carrying out mechanical modification based on the increase and decrease of the control pressure acting on the press part, which causes the discharge volume for rotating per unit of the pump mechanism to change; a change-over valve, forming the first loop connection for reducing said control pressure, connecting the press part with low press side loop, when making the volume-variable mechanism modify to the large volume, at the same time the second loop connection is formed for guiding the discharge pressure of said pump mechanism itself as control pressure, when making the volume-variable mechanism modify to the small volume.

The present invention provides a cryogenic refrigerator which is not influenced by complication of the structure and can restrain a motor against synchronized separation. The cryogenic refrigerator includes a compressor (1) that compresses a working gas; a displacer (3) to which the working gas compressed by the compressor is supplied; a dog link mechanism (22) that includes a drive shaft (33) and is configured to drive the displacer (3); a motor (15) that drives the dog link mechanism; a housing (23) that accommodates the dog link mechanism; and a valve mechanism (V1, V2) that adjusts a pressure of the working gas supplied to the displacer (3), wherein a supply pipe (1a) that supplies the working gas from the compressor (1) to the valve mechanism (V1) is provided with a branch pipe (40) that branches out from the supply pipe (1a), and the branch pipe (40) is connected to an auxiliary space formed between the drive shaft (33a) and the housing (23).

A seat belt retractor for winding a seat belt includes a spool for winding the seat belt, a motor connected to the spool for generating driving torque to rotate the spool, a driving torque transmission mechanism disposed between the motor and the spool and formed of a gear for transmitting the driving torque of the motor to the spool, and a torque limiter mechanism disposed in the driving torque transmission mechanism for preventing a load greater than a predetermined level from being transmitted to the driving torque transmission mechanism.

An impeller for a centrifugal pump comprising a boss supported by a rotation shaft of a motor so as to be rotatable as a unit with the rotation shaft; and a plurality of blades that extend from the boss towards a radial direction outside of the boss, and that discharge liquid towards a leading end side thereof by rotating; wherein each blade comprises one side face that is a face on a first side in a rotation direction of the impeller and includes a projecting face that projects from a base end portion at a boss side of the one side face towards the first side in the rotation direction with respect to a line that connects the base end portion and a center of rotation of the blades.

An oil-free fluid machine unit is provided of which the fluid machine has two or more rotors and torque transmission between the rotors can be performed without a need of using lubrication oil thereby eliminating contamination induced by lubrication oil and without reduction of longevity of the synchronizing gears. The drive shaft 12 of the drive motor 11 is connected to the rotor shaft 14 of the fluid machine, synchronization gears 18 and 19 are attached to the rotor shafts 14 and 15 at the motor 11 side end of the rotor shafts respectively, and pulleys 16 and 17 are attached to the rotor shafts 14 and 15 at the other side ends respectively opposite to the motor 11 and a belt is looped over the pulleys so that the pulleys are rotated in counter direction to each other. At least one of the synchronization gears is made of plastic material. Thus, torque transmission between the rotors is done in two ways, via synchronization gear drive and belt drive.

A brake test stand includes at least one driving motor that is coupled, via at least one torque transmitting device to a load generator and at least one brake to be tested, wherein the driving motor provides the energy to be converted by the brake to be tested and the load generator accepts the energy provided by the driving motor at least prior to the brake test.

An image forming apparatus has an abutment roller which is provided at either end of a developing sleeve in a longitudinal direction and makes an SD gap (Gsd) between a photosensitive drum and a developing sleeve constant, an abutment block which is provided at either end of the photosensitive drum in a longitudinal direction and on which the abutment roller abuts, and a pressing spring which directly presses the abutment roller toward the abutment block. The stability of the SD gap (Gsd) and reduction of the driving load torque of the developing sleeve can be achieved to cope with both high image quality and durability of the image forming apparatus.

A stall recovery system for a ram air turbine (RAT) that supplements the operation of a volume fuse in the hydraulic system of the RAT by sensing a stall condition as the combination of low pressure at less than maximum flow and reducing RAT load torque after the sensed stall so that stall recovery is possible.

The invention relates to the technical field of fluid transmission and control digitization, in particular to a rotor valve core of a hydraulic 1D digital rotary valve, which is characterized by comprising a mandrel, a motor stator and an angular displacement sensor, one part of the core shaft is a motor rotor shaft, the other part of the core shaft is provided with a valve hole, the surface of the core shaft at the valve hole is provided with a plurality of grooves, the motor rotor shaft is coaxially matched with the motor stator, and the valve hole is matched with the valve sleeve; after the valve hole is matched with the valve sleeve, any logic control valve circuit of a two-position two-way valve core, a two-position three-way valve core, a two-position four-way valve core or a three-position four-way valve core is formed; the mandrel and the motor stator can form any one structure of a servo motor, a servo stepping motor or a rotary electromagnet, and digital control is achieved under the action of a control system. Compared with the prior art, the driving motor rotor and the rotor valve element are of an integrated structure, the structure is compact, the size and the weight are reduced, the assembly process is simplified, and the control precision and the response speed are improved.

The invention belongs to antenna tilt balancing parts, and particularly relates to an antenna tilt balancing part, a balancing bracket and a balancing mechanism containing the antenna tilt balancing part. The balancing mechanism includes the U-shaped balancing bracket, and the antenna tilt balancing part is arranged on the balancing bracket; the antenna tilt balancing part includes a shell, an anti-torque spring, an anti-torque shaft and a bearing, the outer ring of the bearing is fixedly connected with the inner wall of the shell, one end portion of the anti-torque shaft penetrates through the inner ring of the bearing and is connected with the other end of the anti-torque spring, and the other end portion of the anti-torque shaft extends to the exterior of the shell. Through adoption ofa tilt balancing device, eccentric torque generated on the anti-torque shaft by the surface of an antenna under the gravity effect can be overcome, stress performed on the surface of the antenna is balanced, the loaded torque of a motor is reduced, and therefore a tilt motor on the surface of the antenna can drive the surface of the antenna to rotate around a tilt axis under low power to achieve required speed and accelerated speed, so that required accuracy is achieved, not only is the cost saved, but also the weight and size of the overall machine are reduced, and the demands of design and application can be met.

A slag remover for discharging combustion residues of an incineration plant comprises a trough, which has a trough housing having two side walls, which define the trough width, and having a trough bottom, and which is intended to collect the combustion residues evacuated from a combustion chamber of the incineration plant. The trough further comprises at least two push rams for pushing the combustion residues out of the trough, and a shaft rotatably mounted in two shaft bearings and on which at least one drive lever cooperating with a cylinder-piston unit and at least two output levers connected to respectively one of the push rams are disposed in a rotationally secure manner. The cylinder-piston unit is here designed such that the push rams move back and forth between a retracted position and an extended position. The drive lever is disposed between two output levers.

According to an embodiment of the invention, a revolver unit is rotationally driven by using three stepping motors. The weight of developing cartridges loaded on the revolver unit is identified on the basis of the quantity of remaining toner in toner cartridges. At the time of rotationally driving the revolver unit, output timing of the stepping motor closer to the developing cartridge which has a large quantity of remaining toner and has a heavy weight is made earlier, and output timing of the stepping motor far from this developing cartridge is delayed.

The invention discloses a lower limb exoskeleton with variable-axis knee joints. The lower limb exoskeleton comprises a backpack module, a left part and a right part, wherein the left part and the right part have the same structure and are symmetrically mounted at the lower part of the backpack module; the left part comprises a hip joint module, a thigh module, a knee joint module, a shank module,an ankle joint module, a foot module, a rear linkage and an energy storage module; each knee joint module comprises a knee joint upper linkage, a knee joint rear linkage, a knee joint lower linkage,a knee joint left rocker and a knee joint right rocker. The exoskeleton selects the variable-axis knee joints as the knee joint modules, so that not only is the single degree-of-freedom requirement ofhuman knee joints met, but also an instantaneous center of rotation can be variable by means of optimization of structural design and size parameters of the knee joint modules, centrode of the knee joint lower linkages relative to the knee joint upper linkages is close to theoretical centrode of the human knee joints, and coordination of the exoskeleton and human legs is improved.

A variable-speed drive system includes a driven machine mechanically coupled to a drive machine by a transmission unit. At least two regulating machines are mechanically coupled to the transmission unit and operated by at least two frequency converters. At least one of the at least two frequency converters is electrically connected to the drive machine by a changeover device, wherein a connection of the drive machine to at least one electric supply network is at least temporarily disconnectable to produce a controlled speed change on the drive machine.

Provided is a stator for an electrical machine including a plurality of segments, whereinin order to reduce torque harmonics and power harmonics due to the interposed circumferential gap between two circumferentially adjacent stator segments,at least one of the two end teeth of each stator segment includes a circumferential protrusion at the respective tooth radial end, the circumferential protrusion protruding from the respective side face towards the respective circumferential end.

A drive transmission mechanism for transmitting torque between two or more rotary shafts in synchronization with one another without need for lubrication thereby eliminating occurrence of oil contamination, and an oil-free fluid machine equipped with the mechanism, are provided. A magnetic drive disk and a synchronization gear are attached to a rotary shaft connected to a drive motor, a magnetic drive disk and a synchronization gear is attached to a rotary shaft, torque transmission from the rotary shaft to the rotary shaft is carried out in two ways, via the magnetic drive disks and via the synchronization gears and at least one of the synchronization gears is made of plastic material. With the construction, torque transmit load between the rotary shafts via the synchronization gears is decreased, and a plastic gear or gears can be adopted for synchronization gears without reducing life of the gears without need for lubrication oil.