455results about How to "High torque" patented technology

The invention relates to an electric drive axle and an electric truck. An electric drive axle is used for an electric truck, the electric drive axle is provided with a main drive motor, an auxiliary drive motor, a speed reducer assembly and a differential mechanism, the speed reducer assembly is provided with a gear shifting mechanism, a main drive first-stage speed reduction stage, an auxiliary drive first-stage speed reduction stage, a main drive second-stage speed reduction stage and an auxiliary drive second-stage speed reduction stage, the main drive secondary speed reduction stage and the auxiliary drive secondary speed reduction stage can be respectively connected with an output shaft of the speed reducer assembly through a gear shifting mechanism, the output shaft is directly connected with the differential mechanism, and the main drive secondary speed reduction stage comprises a main drive first-gear driving gear, a first-gear driven gear meshed with the main drive first-gear driving gear, a main drive second-gear driving gear and a second-gear driven gear meshed with the main drive second-gear driving gear. The auxiliary drive two-stage speed reduction stage comprises an auxiliary drive first-gear driving gear, a first-gear driven gear meshed with the auxiliary drive first-gear driving gear, an auxiliary drive second-gear driving gear and a second-gear driven gear meshed with the auxiliary drive second-gear driving gear. The electric truck according to the invention has an electrically driven axle.

The utility model relates to the technical field of machining, and particularly discloses a handheld servo electric screwdriver which comprises an electric screwdriver cap, a servo motor, an electric screwdriver handheld portion and an electric screwdriver chuck portion which are sequentially arranged from top to bottom, and the electric screwdriver cap is provided with an aviation plug, a start-stop photoelectric control panel, a start-stop switch and a forward and reverse rotation switch. The aviation plug, the servo motor, the start-stop switch and the forward and reverse rotation switch are all electrically connected with the start-stop photoelectric control panel, the servo motor is in transmission connection with an electric screwdriver chuck main shaft through a transmission shaft, and an electric screwdriver chuck push-pull sleeve is arranged at the bottom of the electric screwdriver chuck part. The bottom of the electric screwdriver chuck main shaft is located on the inner side of the electric screwdriver chuck push-pull sleeve. The start-stop switch and the forward and reverse rotation switch are arranged to control start-stop and forward and reverse rotation of the servo motor, the servo motor drives the electric screwdriver chuck main shaft to rotate to output torsion, the torque is large, the rotating speed is moderate, heating is small, mechanical abrasion is avoided, and therefore the service life is long, and the failure rate is low.

The invention provides a laser scanning galvanometer with a self-calibration system, and relates to the technical field of scanning galvanometers, the laser scanning galvanometer comprises a laser scanning galvanometer body, the laser scanning galvanometer body is internally provided with an inner cavity, the inner cavity is internally provided with a calibration structure, the calibration structure comprises a first calibration assembly, and a special-shaped support is fixedly installed on the inner wall of the inner cavity. A first circular groove is formed in the special-shaped support in a penetrating mode, the two first damping bearings are both arranged in the first circular groove, and outer rings of the two first damping bearings are both fixedly installed on the inner wall of the first circular groove. The overall structure of the calibration structure is mostly integrated on the special-shaped support, and the vibrating lens assembly on the high-speed motor generally has a replacement function, so that the first worm gear is conveniently arranged on the output shaft of the high-speed motor, additional installation on the existing basis is facilitated, the improvement cost is low, and the practicability is improved.

The present invention discloses a gas power device, comprising an outer ring and a core body, wherein at least one-step secondary flow channel is arranged between the nozzle and the exhaust port on the outer ring surface of the core body, gas enters from the air inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, acts on at least two driving recesses on the circumference of the outer ring, generates thrust on these driving recesses, drives the outer ring to rotate and do work, realizes power output, and finally, the gas is discharged through the exhaust port of the core body via the exhaust channel.

The present invention belongs to the technical field of engineering machinery and equipment, and in particular, relates to a bridge pile foundation drilling device, comprising: a vehicle body, which moves through a crawler mechanism; a mounting rod, which is fixedly connected to the top of the vehicle body and is tilted; a lifting mechanism, which is arranged on one side of the mounting rod; a drilling mechanism, which is arranged on the side of the mounting rod away from the lifting mechanism, and the drilling mechanism is fixedly connected to the lifting end of the lifting mechanism; an adjusting mechanism, which is arranged in the vehicle body, and the adjusting mechanism is located at one end of the vehicle body away from the drilling mechanism, and the bottom end of the adjusting mechanism extends out of the vehicle body; a cleaning mechanism, which is sleeved on the outside of the drill rod, and the cleaning mechanism is located at the bottom end of the drill rod, and the cleaning mechanism is fixedly connected to the mounting rod. The present invention changes the torque of the drill rod, so that the drill rod can drill through soil layers of different hardness, with little disturbance to the soil body, and does not increase additional workload, which is convenient and simple.

The utility model belongs to the technical field of steering engines, and particularly relates to an assembly type steering engine structure which comprises a steering engine body, a motor is fixedly installed in the steering engine body, the output end of the motor is fixedly connected with a driving gear, a driven gear is arranged in the steering engine body, a planetary gear set is arranged in the steering engine body, and a planetary gear is arranged in the planetary gear set. The output end of the planetary gear set is connected with an output shaft, and a PCB is fixedly installed in the steering engine body. According to the assembly type steering engine structure, the impact resistance of the assembly type steering engine structure is effectively improved by installing the planetary gear set, when the planetary gear set moves, the rotating speed transmitted by the motor is reduced, torque is increased to enable the output shaft to rotate, and joint movement of the wrestling robot is controlled; the output stage adopts a planetary structure, the impact resistance is increased, the service life is prolonged, the transmission efficiency is improved, a PCB, a potentiometer and a motor can be placed on the same side of the steering engine, and the steering engine is more compact.

The invention discloses a filtering device for a water purifier and relates to the technical field of water purifiers, the filtering device comprises a shell and a cleaning assembly, a water inlet pipe is arranged at the lower end of one side of the shell, a water outlet pipe is connected to the center of the top of the shell, a blow-off pipe is connected to the bottom of the shell, and a filtering cylinder is fixed to the upper end of the interior of the shell; the cleaning assembly is arranged at the upper end of the interior of the shell. When the pump body conveys water flow into the shell from the water inlet pipe, the end cover can seal the blow-off pipe, so that the water pressure of the lower end in the shell is increased, the water flow can push a scraping ring to move upwards, a compression spring is shrunk, and when the scraping ring moves to the upper end in the shell, a transmission rod is extruded through a limiting ring, so that the scraping ring is driven to rotate; the connecting rod pulls the pressing block to move upwards through the transmission frame, the driving block can have a certain moving space, water flow can push the needle plate to be separated from the filter cartridge, and therefore when water flows, the filter cartridge can block particle impurities in the water.

The utility model discloses a shoe anti-rollover performance test device, comprising a simulation foot device which comprises a simulation leg model and a simulation foot model, the simulation leg model simulates knee joint motions when a leg treads and lifts up, and the simulation foot model wears a shoe to simulate ankle joint motions when the foot stands or laterally stretches and lifts up; the ground-like device is provided with a treading platform mechanism and a lifting mechanism, the treading platform mechanism is provided with a test platform, and the test platform is provided with a treading plane for simulating the simulation foot mold and bears treading force generated when the simulation foot mold performs lateral pedaling and stretching actions; the lifting mechanism controls the treading platform mechanism to move in the vertical direction so that the sole of the simulation foot mold can make close contact with the testing platform. And a control and data acquisition module. The utility model provides an anti-rollover performance test device for shoes, which can simulate landing angles, impact forces and action time between different legs and feet and the ground, and evaluate the overall anti-rollover performance difference of the shoes under different exercise intensities.

The invention discloses a flat wire winding structure, belonging to the field of motor technology, comprising a stator core, wherein the upper and lower sides of the stator core are respectively the connection side and the insertion side of the flat wire, and the inner side surface of the stator core is provided with a plurality of evenly distributed axial slots along the circumferential direction, the number of winding poles of the flat wire winding structure is 2p, the number of slots of the axial slots is m, each axial slot is provided with 2n layers of conductors, and a flat wire U-shaped hairpin is inserted in the axial slot, and the flat wire U-shaped hairpin includes three pitch structures of full pitch Y1=m / 2p, long pitch Y2≥Y1+1 and short pitch Y3≤Y1‑1, and Y2‑Y3=m / 2p / 3, and the flat wire U-shaped hairpin adopts a cross-layer structure of two adjacent layers. The invention adopts a single-branch triangle wiring mode or a single-branch star wiring mode or a double-branch star wiring mode, and the potentials of the three modes are balanced, there is no circulating current problem, and the winding structure is simple and has no special-shaped wires.

The utility model relates to the technical field of linear push rods, in particular to a large-torque linear push rod. Comprising a rear end assembly; the sleeve assembly is arranged on one side of the rear end assembly; the motor assembly is arranged in the rear end assembly; the lead screw assembly is connected with the motor assembly, and the lead screw assembly is arranged in the sleeve assembly; the telescopic pipe assembly is arranged between the sleeve assembly and the lead screw assembly, and the motor assembly is fixedly connected with the lead screw assembly through a coupler; the coupler comprises a motor frame arranged at the output end of the motor assembly; the fixing base is arranged close to the motor frame, and the fixing base is arranged on the periphery of an inner lead screw of the lead screw assembly; and the fixed seat is in spline connection with the motor frame. The utility model has the advantages of larger thrust, good stability, simple structure, convenience in use and the like.

The utility model belongs to the technical field of well drilling and workover fishing equipment, and discloses a slip fishing socket. The slip fishing barrel comprises an outer barrel body and a fishing slip located in the outer barrel body, relative displacement is formed between outer spiral sawteeth of the fishing slip and corresponding teeth in the outer barrel body, a first top cutting face is formed at the tail of the outer spiral sawteeth of the fishing slip, and a second top cutting face is formed at the tail of the first top cutting face. And a second top cutting surface is formed at the root part of a tooth corresponding to the outer spiral sawteeth in the outer cylinder body. According to the slip fishing socket, fishes of different specifications and some severely-deformed fishes can be fished, meanwhile, the inventory of blue tiles and spiral tiles is reduced, the number of times of tripping is reduced, and therefore the working efficiency is improved.

The utility model discloses a variable taper thread structure, which relates to the technical field of machining, and is characterized in that the variable taper thread structure comprises a male joint and a female joint, the male joint is sequentially provided with an auxiliary circular bead sealing surface B, a front section thread A, a middle section platform A, a rear section thread A and a main circular bead sealing surface A from a position far away from a screw cap, an auxiliary circular bead sealing face B, a rear-section thread B, a middle-section platform B, a front-section thread B and a main circular bead sealing face B are sequentially installed in the female connector, the front-section thread A is meshed with the front-section thread B, and the rear-section thread A is meshed with the rear-section thread B. The drill rod connector has the advantages that the problems that in the background technology, the torsional strength and the fatigue strength of the drill rod connector are reduced, and the service life of the drill rod connector is prolonged are solved. And risks of thread gluing, expansion of the female thread joint, breakage of the male thread joint and the like also exist.

The invention discloses a mining permanent magnet motor with a braking function, and relates to the technical field of motor equipment, the mining permanent magnet motor comprises a permanent magnet motor shell and a rotating shaft, the tail end of the rotating shaft is connected with a cooling fan, and the mining permanent magnet motor further comprises a braking structure arranged in the permanent magnet motor shell; the braking structure comprises a rotor core, the rotor core is fixed on the outer surface of the rotating shaft, a permanent magnet is embedded in the rotor core, a stator core is installed on the inner wall of the permanent magnet motor shell, a stator winding is installed on the inner wall of the stator core, a first groove is formed in the inner wall of the middle of the permanent magnet motor shell, and a second groove is formed in the inner wall of the middle of the permanent magnet motor shell. A plurality of sets of arc-shaped grooves are formed in the two sides of the first groove, when the friction ring extrudes the second groove, friction force can be generated to reduce the rotating speed of the rotor iron core, meanwhile, when the limiting grooves correspond to the protruding pieces in position, the protruding pieces can be embedded into the inner sides of the limiting grooves to limit rotation of the rotor iron core, and therefore the braking effect is achieved; the occupied space is small, and the load is reduced.

The invention relates to the technical field of ship transmission, in particular to a propeller speed reducer, a ship and a ship control method. The propeller speed reduction device comprises a gear box, a speed reduction unit, a power input unit and a tail transmission execution unit, the speed reduction unit comprises a first-stage speed reduction assembly and a second-stage speed reduction assembly, the second-stage speed reduction assembly comprises a first cylindrical gear and a first face gear, and the first cylindrical gear and the first-stage speed reduction assembly are in coaxial transmission; the axis of the first cylindrical gear and the axis of the first face gear intersect to form an included angle, the first cylindrical gear is connected with the first face gear in a meshed mode, the tooth end face of the first face gear is arranged in a taper mode, the power input unit is connected with the first-stage speed reduction assembly, and the tail transmission execution unit is connected with the first face gear. According to the invention, the condition of any small dip angle of a ship can be met, and a transmission mode of the cylindrical gear and the face gear is adopted, so that the higher speed ratio of the whole machine is realized, the power density is effectively improved, pairing processing is not needed, and the processing and maintenance cost is greatly reduced.

The invention discloses a station conversion driving mechanism for water ice content detection of a lunar soil water molecule analyzer. The station conversion driving mechanism comprises a worm assembly, a worm gear, a worm gear case, a first flat key, a rotating shaft, a first bearing pressing ring, a first bearing, a worm gear fixing ring, a screw, a second flat key, a second bearing, an encoder, a second bearing pressing ring and an encoder seat. Worm gear and worm meshing transmission is utilized, the rotating shaft is driven to rotate by means of the supporting effect of the first bearing and the second bearing, and driving force is provided for station conversion of a sample support assembly with a hole shaft matched on the transmission shaft by means of radial limiting of the first flat key on the transmission shaft. The mechanism is compact in structure, light in weight, wide in use temperature range and large in output torque, and can be used as a driving mechanism for multi-sample support station conversion of the lunar soil water molecule analyzer.

The invention discloses a motor assembly and a flight vehicle, and relates to the technical field of motors, the motor assembly comprises a stator structure and an outer rotor structure; the stator structure is provided with a supporting shaft part, and the stator structure is used for being installed on an arm of a flight vehicle; the outer rotor structure is provided with a connecting through hole, and the connecting through hole is in running fit with the supporting shaft part; the outer rotor structure is used for mounting the rotor blade, and the outer rotor structure is used for rotating relative to the stator structure under the acting force of a magnetic field so as to drive the rotor blade to rotate relative to the machine arm. According to the technical scheme, an inner rotor motor used for driving the rotor blades to rotate is replaced with the outer rotor motor, a speed reducer and matched devices thereof can be omitted, and the rotor blades are driven in a direct drive mode, so that the motor structure is simplified, the number of parts is reduced, and the motor assembly is more compact in structure and lighter in weight; therefore, the overall weight of the flight vehicle is reduced, and the assembly and subsequent maintenance of the flight vehicle are more convenient.

The invention discloses a method and device for controlling vehicle driving, a vehicle and a storage medium. The method comprises the steps of obtaining the speed of a vehicle; gradient information is obtained, wherein the gradient information represents the inclination degree of the ground where the vehicle runs currently; based on the speed and gradient information of the vehicle, a control result is determined, the control result indicates whether an integral term in a specified calculation formula is cleared or not, the specified calculation formula is a calculation formula adopted when the PID control algorithm is adopted for carrying out driving control on the vehicle, and the integral term represents an accumulative error generated when the PID control algorithm is adopted for carrying out driving control on the vehicle; and controlling vehicle driving based on the control result. According to the technical scheme provided by the embodiment of the invention, when the gradient information of the current driving ground of the vehicle changes and the acceleration process needs to be ended, the accumulated error can be eliminated, the situation that the acceleration process of the vehicle cannot be ended in time is avoided, excessive overshoot of the vehicle speed is avoided, and thus the riding experience of a user is improved.

The invention provides an in-situ mechanical detection rack, device and method for a synchrotron radiation light source. The in-situ mechanical detection rack comprises an output power part, a transmission part, a sensing part, a heat dissipation part and a supporting part. The in-situ mechanical detection device comprises an in-situ mechanical detection rack, a controller and terminal control software. The ball screw which is integrally ground and formed in a left-and-right rotating mode has extremely high collimation degree and precision, rigid fixation is applied to the two ends of each stage of worm and gear transmission shaft, and the situation that the screw connected with a worm gear deforms due to shearing force provided by a worm is avoided. The heat dissipation system for the motor avoids the problems of sensor temperature excursion, unstable working condition of the motor, thermal expansion of a sample and the like caused by heat accumulation of the rack. Due to the sitting type layout, the stable base, the holes in the specific positions and the small instrument size, the device can be perfectly matched with the experiment conditions of a synchrotron radiation laboratory. The in-situ mechanical detection rack and the in-situ mechanical detection device can be directly used for carrying out synchrotron radiation in-situ mechanical detection operation.

A wireless induction power supply air circulation fan comprises a fan assembly and a seat body, the seat body comprises a fixed seat and a rotating seat rotationally connected to the fixed seat, and the fan assembly is assembled on the rotating seat; the driving device is used for driving the rotating seat to rotate along the end surface of the fixed seat; the power supply device is used for being electrically connected with the fan assembly and providing a starting power supply for the fan assembly, and the power supply device comprises an electromagnetic emission assembly used for generating a magnetic field; and the electromagnetic receiving assembly and the electromagnetic transmitting assembly are correspondingly arranged in the rotating shaft, and the electromagnetic receiving assembly is used for providing a driving power supply. According to the electromagnetic induction principle, a wireless induction power supply mode is adopted for supplying power to the fan assembly, so that the fan can be driven to rotate under the condition that a power line is omitted, real uninterrupted and dead-angle-free 360-degree rotary motion is achieved, and the blowing requirement of a user is met.

The invention discloses a hydraulic system of a non-circular heading machine blind area cutting device and a control method. The problems that in the prior art, a non-circular heading machine is low in blind area processing efficiency in construction and the like are solved. The hydraulic system comprises roller cutting tools arranged in excavation blind areas of two adjacent circular cutter heads, and the roller cutting tools are driven by a closed hydraulic control system; the closed hydraulic control system comprises a pump set, a port A and a port B of the pump set are respectively connected with a bidirectional constant displacement motor set, and an oil return control valve set is arranged between the port A and the port B of the bidirectional constant displacement motor set; the pump set comprises a two-way variable pump and an oil supplementing pump. A first part of replenished oil of the oil replenishment pump adjusts the output direction and the displacement of the two-way variable pump through a displacement adjusting device; and the second part of supplementary oil of the oil supplementing pump is used for supplementing oil to the pump set through the oil supplementing valve set. The hydraulic control system structure of the blind area processing device is small in soil disturbance, small in section overexcavation amount and high in construction efficiency, the advancing resistance of the heading machine can be reduced, and the accuracy of heading attitude control of the heading machine is guaranteed.

The utility model relates to a swiveling head for a down-the-hole drill. The swiveling head comprises an input gear shaft, an output gear, a main shaft and a gear box. The input gear shaft is connected to the power system which is used for driving the input gear shaft to rotate. The output gear is meshed with the input gear shaft; the output gear is sleeved on the main shaft; the output gear is used for driving the spindle to rotate; the central shaft of the input gear shaft is parallel to the central shafts of the output gear and the main shaft; the gear box provides mounting space for the input gear shaft and the output gear; the input gear shaft and the main shaft are rotationally connected with the gearbox; the gearbox is provided with a third through hole used for disassembling the input gear shaft. Through the pair of input gear shafts, the torque of the output gear is increased, and the service life of the input gear shafts is prolonged; through reasonable layout of the input gear shaft and the output gear, gears of the gear box are effectively reduced, and the gear box is lighter.

The utility model relates to a wheel hub motor, which comprises a wheel hub, end covers, a rotating main shaft, connecting spokes, a stator and a rotor, the whole wheel hub is annular, the end covers are respectively fixed at openings at two sides of the wheel hub to form a closed cavity, and the connecting spokes, the stator and the rotor are arranged in the closed cavity; the rotating main shaft is arranged at the central axis of the end cover through a rotating bearing, the connecting spokes are arranged in the radial direction of the hub, one end of each connecting spoke is fixedly connected with the rotating main shaft, and the other end of each connecting spoke is fixedly connected with the stator; and the rotor is fixed on the inner side of the end cover, is positioned on the outer side of the stator and is arranged close to the stator. The motor is stable and reliable in working performance, and can meet the working requirements of large torque and high speed.

The invention discloses a single-steel-wheel road roller extended-range hybrid power system and a control method thereof.The system comprises a VCU complete machine controller, a battery pack, and a PDU distribution box, an ECU controller, a battery high-voltage box, a DC converter, an execution device and a range extender which are in signal connection with the VCU complete machine controller. The transmission efficiency of whole vehicle operation is low, and the cruising ability is poor in a pure electric mode.

The invention relates to the technical field of robot human joints, in particular to a robot joint reducer and a joint device which are high in reduction ratio, compact in design and quick in response. Comprising a shell which is independently and fixedly arranged; the planetary gear train is arranged in the shell and comprises an inner gear ring, a sun gear, a planet gear and a planet carrier, the inner gear ring is rotationally connected with the shell, the sun gear is coaxially arranged on the inner side of the inner gear ring, the planet gear is meshed with the inner gear ring and the sun gear, the planet carrier is rotationally connected with the planet gear, and the sun gear drives the planet carrier through the planet gear; the input shaft is arranged on the side, away from the planet carrier, of the sun gear, one end is coaxially and fixedly connected with the sun gear, and the other end penetrates through the shell and extends to the outside; the output shaft is arranged on the side, away from the planet wheel, of the planet carrier, one end is fixedly connected with the planet carrier, and the other end penetrates through the shell and extends to the outside; the transmission mechanism is in transmission connection with the input shaft and the inner gear ring, and the input shaft drives the inner gear ring through the transmission mechanism.

The invention relates to the technical field of electric tools for mines, in particular to a mining explosion-proof handheld impact torque wrench which comprises an outer shell and an explosion-proof inner shell, a direct-current brushless motor is mounted on the upper portion of the explosion-proof inner shell, and the front end of a motor shaft penetrates out of the explosion-proof inner shell to be sequentially connected with a speed reducing mechanism and an impact mechanism. The impact mechanism comprises a power spindle, a striking block, a T-shaped shaft and an impact spring, the rear end of the power spindle is connected with the speed reducing mechanism, the T-shaped shaft is fixed to the front end of the power spindle, the front end of the T-shaped shaft extends out of the shell, the striking block sleeves the power spindle, grooves are formed in the connecting surfaces of the striking block and the power spindle, balls are movably embedded in the grooves, and the two ends of the impact spring abut against the striking block and the power spindle; an 8-shaped movable groove is formed in the front end face of the striking block, the T-shaped shaft comprises an output shaft and a striking anvil block, and the striking anvil block can rotate in the movable groove. The mining explosion-proof handheld impact type torque wrench can effectively solve the technical problems that an existing electric impact wrench does not have the explosion-proof performance and is small in torque.

The invention relates to the technical field of experimental instruments, and discloses an oscillation driving device and a culture device. The oscillation driving device includes: a base plate; the motor is arranged below the bottom plate; the eccentric shaft assembly is arranged above the bottom plate, the eccentric shaft assembly comprises a rotating shaft and an eccentric shaft which are eccentrically arranged, and the rotating shaft penetrates through the bottom plate to be connected with the motor; the driving plate is arranged above the eccentric shaft assembly and is connected with the eccentric shaft; and the fixing mechanism is located between the driving plate and the bottom plate, a limiting part is limited by the fixing mechanism, and the limiting part is matched with the eccentric shaft assembly and / or the driving plate so that the eccentric shaft assembly can drive the driving plate to move along a preset track. Therefore, the oscillation driving device is directly driven by the motor, the transmission loss is reduced, and the noise is reduced.

This invention provides a cup assembly for a food processor, including a cup body, a cup lid, and a processing component disposed within the cup body. It also includes a gearbox, which comprises a movably disposed clutch output shaft. When the clutch output shaft moves to a first position, it drives the processing component to output a first rotational speed; when the clutch output shaft moves to a second position, it drives the processing component to output a second rotational speed. The cup lid is installed in place, maintaining the clutch output shaft in either the first or second position. Furthermore, a food processor with the aforementioned cup assembly is provided. In the first position, the clutch output shaft outputs a first rotational speed to adapt to multi-functional cooking; in the second position, it outputs a second rotational speed to adapt to another multi-functional cooking method requiring a different speed. By changing the position of the clutch output shaft, the processing component can be replaced and the rotational speed can be automatically switched. Moreover, the output speed range is wide and the torque is high, avoiding stalling caused by high processing resistance.

The invention discloses an integrated energy-saving electric drive axle transmission assembly and a transmission method thereof. The integrated energy-saving electric drive axle transmission assembly comprises a motor, a speed reducer mechanism is connected with the motor, a differential mechanism is connected with the speed reducer mechanism and arranged in the speed reducer mechanism, and a commutator mechanism is connected with the differential mechanism and arranged in the speed reducer mechanism. According to the electric drive axle transmission assembly, the differential mechanism is integrally arranged in the speed reducer mechanism, and the differential mechanism is connected with the secondary driven gear on the speed reducer mechanism, so that the electric drive axle transmission assembly is compact in structure and high in integration degree, high-performance output of the electric drive axle transmission assembly is guaranteed, meanwhile, the size and the weight of the electric drive axle transmission assembly are reduced, and the cost is reduced. When the differential lock is used on a complex road surface, the transmission performance is effectively improved, the cross-country performance is improved, meanwhile, the differential lock structure is of a mechanical structure, the structure is simple, reliability is guaranteed, the performance is effectively improved, and meanwhile the production cost is reduced.

A bidirectional air inlet three-dimensional flow fan driven by a coupler comprises a machine shell, an impeller is arranged in the center of the interior of the machine shell, the impeller is a three-dimensional flow impeller of a bidirectional air inlet structure, the impeller is fixed to a main shaft through a hub, the main shaft penetrates through the interior of the fan, and one end of the main shaft is connected with a motor through the coupler; the impeller comprises two front disc bodies, a shared rear disc body and a plurality of ternary twisted blades installed on the two sides of the rear disc body, the ternary twisted blade on any side is installed between the front disc body and the rear disc body, and the ternary twisted blades are evenly arranged on the two sides of the rear disc body in the circumferential direction at intervals and are in mirror symmetry. And the design molded line of the ternary twisted blade at the front disc body is deviated towards the rotating direction of the impeller compared with the design molded line at the rear disc body, so that the design molded line at the front disc body is not crossed with the design molded line at the rear disc body. The machining process of the blade is simpler, the production period and cost are reduced, and the air inflow of the fan is effectively increased through the design of bidirectional air inflow.

The utility model discloses a test bench for testing an electro-hydraulic power-assisted steering gear. The test bench comprises an input end driving and measuring system, an output end loading and measuring system, an oil supply and power system and an electrical and control system. The input end driving and measuring system comprises a servo motor, a first angle gauge, a torque sensor and a universal joint which are connected in sequence; the universal joint is connected with an input shaft of the electro-hydraulic steering gear through the input clamp; the output end loading and measuring system comprises a torque sensor, a bearing seat and a loading shaft which are connected in sequence; the loading shaft is connected with an output shaft of the electro-hydraulic steering gear; a loading swing arm is fixed on the bearing seat, and a force arm of the loading swing arm is sequentially connected with a connection adjusting mechanism and a servo oil cylinder; the oil supply and power system comprises an oil supply pump station and a power pump; the oil supply pump station provides an oil source for the electro-hydraulic steering gear; the power pump provides oil pressure power for the servo oil cylinder; and the electrical and control system is electrically connected with the input end driving and measuring system, the output end loading and measuring system and the oil supply and power system respectively.