48results about How to "High power density ratio" patented technology

The invention discloses a compact high-pressure plunger variable double pump, which comprises a shell, a rear cover, a cylinder body, a plunger piston shoe assembly, a swash plate and a thrust plate which are fixedly matched with one another, wherein a positioning pin is arranged at one end of the outer ring edge of the thrust plate, and the other end of the positioning pin is inserted into and matched with the rear cover; an oil suction ring groove is formed on one side of the inner surface of the thrust plate, and is oppositely matched with an oil suction on the valving surface of the cylinder body; and two oil outlet ring grooves with equal oil outlet apertures are formed on the other side of the inner surface of the thrust plate, and the two oil outlet ring grooves are oppositely matched with an oil outlet on the valving surface of the cylinder body. When an oil pump is used in engineering machinery, the compact structure and highly-integrated function of the oil pump is increasingly perfected. Through the structure of the invention, the function of the double pump is realized by a single cylinder body, and the integral structure is suitable for the application to the engineering machinery, realizes the output function of oil sources with the same flow rate, can meet the requirement of the synchronism of an external actuating mechanism effectively, and improves the using efficiency; and the compact structure of one pump for dual oil output is favorable for improving the actual using effect and prolonging the actual service life, and has higher reliability.

A cartridge type two-dimensional servo valve with a temperature compensation type damping piston comprises a valve body module, an electric-mechanical converter module and a position sensor module. The valve body module comprises a two-dimensional valve composed of a valve element and a valve sleeve, and the valve element is rotatably placed in a hole in the valve sleeve in an axially sliding mode. The valve element 30 is provided with five shoulders, the right end of the valve sleeve is connected with the electric-mechanical converter module through a connecting plate, the valve element is fixedly connected with an armature, and the right end of the valve element is connected with the electric-mechanical converter module through the armature. The damping piston is arranged on the right surface of the fourth shoulder, and a damping cavity f is organically formed by the left side of the damping piston, the valve sleeve and the valve element in an enclosed mode. The right side of the damping piston is exposed to a high pressure hole b. A gap is formed between the damping piston and the valve sleeve. A torque motor is adopted for the electric-mechanical converter module, one end of aspring is connected with a spring rod, and the other end of the spring is connected with a spring seat fixed to an outer shell. The displacement sensor module comprises an LVDT connecting rod and an LVDT sensor.

The invention discloses a torque motor directly controlled cartridge two-dimensional electro-hydraulic proportional reversal valve. The torque motor directly controlled cartridge two-dimensional electro-hydraulic proportional reversal valve comprises a valve sleeve, a valve core, a corrugated pipe coupler, a rectangular alignment magnetic stripe, a partition plate and a torque motor; a two-dimensional valve and a cartridge valve are combined together, through the characteristic that the two-dimensional valve enables the pilot stage and the power stage to be integrated with two movement freedomdegrees of a single two-dimensional valve core, the design including a two-section valve core and a two-section valve sleeve is adopted, and the cartridge two-dimensional valve is higher in application integration level, power density ratio and pollution resistance compared with a traditional cartridge valve; and the torque is transmitted through the corrugated pipe coupler, alignment resetting is conducted through the alignment magnetic stripe, the complexity of a transmission mechanism of the traditional two-dimensional valve is made up, and the structure is more simple.

The invention discloses a flexible upper-limb assistance exoskeleton. The flexible upper-limb assistance exoskeleton comprises an exoskeleton flexible execution part and a control system. The flexibleupper-limb assistance exoskeleton mainly uses the negative pressure rotating pneumatic artificial muscle as a flexible driving element and a miniature vacuum air pump as a negative pressure source. The control system measures the muscle force, elbow joint angle and human-machine interaction force according to a force sensor, a surface myoelectricity sensor and an inertia measurement unit, processes the feedback of upper-limb force, position and motion information in real time, estimates a man-machine cooperation state, and controls the negative pressure flow rate and the air passage switchingof the miniature vacuum pump in real time. The control system further controls the pressure of the corresponding negative pressure rotating pneumatic artificial muscle on the exoskeleton flexible execution part worn by a left arm and a right arm based on the man-machine cooperation state, and provides real-time torque for the left and right arms to assist elbow joint bending and stretching duringthe upper-limb movement so as to achieve the purpose of helping elbow joint and rehabilitation training of elbow joint movement injury.

The invention relates to a vehicle full-hydraulic steering drive axle, which includes an axle housing, and steering knuckles are hinged at both ends of the axle housing. The steering knuckle is connected with a hydraulic motor, and a service brake and a parking brake are installed on the hydraulic motor. , which is characterized in that the two ends of the axle housing are hinged with the steering knuckle through the upper and lower hinge seats, wherein the upper hinge seat is hinged with the steering knuckle by installing a high-pressure rotary joint, and a double Piston rod hydraulic cylinder, the cylinder body of the double piston rod hydraulic cylinder is fixedly connected with the axle housing, the two piston rod ends of the double piston rod hydraulic cylinder are hinged with the steering rocker arms at the left and right ends, and the other end of the steering rocker arm One end is respectively hinged with the steering knuckles at both ends, and the steering knuckle is driven to swing left and right around the upper and lower hinge seats of the axle housing. The invention has the advantages of simple and reasonable structural arrangement, high power density ratio, large starting torque, stable low-speed operation, small turning radius and good performance; the connection of hydraulic pipelines is more reliable, and the use and sealing performance are better.

The invention discloses a human-simulated mechanical arm based on hybrid driving of various artificial muscles, which comprises a motor driving cradle head, a pneumatic muscle (PAM) bionic elbow joint, a shape memory alloy (SMA) bionic wrist joint and an IPMC bionic hand, wherein a shoulder joint has two rotational degrees of freedom; the elbow joint has three rotational degrees of freedom; the wrist joint has two rotational degrees of freedom; and the bionic hand has four fingers and eleven degrees of freedom, so that the mechanical arm has eighteen degrees of freedom. The cradle head is connected with the elbow joint through a shaft, the elbow joint is fixedly connected with the wrist joint through three bolts, and the wrist joint is fixedly connected with the bionic hand through a screw thread. Compared with a motor driving mechanical arm with the same specifications, the mechanical arm disclosed by the invention has the advantages of simple structure, high power-density ratio, good safety, high flexibility and the like, and the mechanical arm is enabled to have better flexibility and bionics characteristics through simulating a bone-muscle system of an upper limb of the human body. The human-simulated mechanical arm disclosed by the invention can be widely applied to the fields of home services, rehabilitation therapy, risk elimination and rescue, material handling and the like.