36results about How to "Improve force balance" patented technology

A peristaltic pump includes a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid. A plurality of fingers are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations. A cyclical pump mechanism is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle. A motor is coupled to drive the pump mechanism. A controller is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.

A balance-enhancing and vibration-reducing device is incorporated in a wrist exerciser to enhance force balance and reduce vibration caused in the operation of the wrist exerciser. The device includes a ring mounted in a casing of the wrist exerciser and defining diametrically opposite holes that rotatably receive axles of a rotor of the wrist exerciser. A coupler is mounted to an inner circumference of the ring in position corresponding to at least one of the holes. The coupler includes a tube extending in a radial direction of the ring. The tube forms a central bore to rotatably receive the corresponding axle. A plurality of resilient pawls is formed at a free end of the tube and distributed along a circumference of the free end. A balance-enhancing and vibration-reducing element has a central bore fit over the tube of the coupler by elastically deforming the pawls. The pawls so deformed resume their original position by the resiliency thereof to retain the balance-enhancing and vibration-reducing element on the tube. The balance-enhancing and vibration-reducing element effects weight balance and absorption of mechanical vibration force during the rotation of the rotor thereby maintaining stable and noiseless operation of the wrist exerciser.

The invention provides a cooking utensil and an upper cover of the cooking utensil. The upper cover of the cooking utensil comprises an upper face cover, a first actuation part, a material discharge cavity door and a second actuation part, wherein the upper face cover is provided with a washing cavity body, and the washing cavity body is provided with a material discharge hole for discharging materials; the first actuation part is arranged on the upper face cover; the material discharge cavity door can cover the material discharge hole, or can translate in a plane vertical to the central axisof the material discharge hole to be separated from the material discharge hole, so that the material discharge hole is open; the second actuation part is fixed on the material discharge cavity door,is used for realizing actuation and fixing with the first actuation part when the material discharge cavity door covers the material discharge hole, and is separated from the first actuation part whenthe material discharge cavity door is separated from the material discharge hole. For the upper cover of the cooking utensil provided by the technical scheme, by utilizing the actuation and fixing ofthe first actuation part and the second actuation part, the stable covering of the material discharge cavity door with the material discharge hole can be guaranteed, and meanwhile, the purposes of reducing driving energy consumption and reducing fatigue damage of a power device are achieved.

The invention discloses a multi-stage compressed gas engine, which comprises an impeller and at least one impeller chamber where the impeller is installed. The impeller includes a first impeller and a second impeller. The side plates on both sides between the teeth form a plurality of working chambers, and the inner surface of the impeller chamber where the impeller is installed and the working chambers form a plurality of air chambers that can be relatively sealed to inject gas. The first compressed gas injection hole and the first compressed gas discharge hole are correspondingly opened on the impeller chamber of the first impeller, and the second compressed gas injection hole and the second compressed gas discharge hole are correspondingly opened on the impeller chamber where the second impeller is installed. , the output of the first compressed gas injection hole is connected to the second compressed gas injection hole. The invention also discloses a motor vehicle equipped with the compressed gas engine. By adopting the invention, the energy utilization efficiency of compressed air can be fully improved.

The invention discloses a boom rack and a dynamic compaction machine. The boom rack comprises a truss boom, a support rod and a tensioning mechanism, wherein the bottom end of the support rod is connected with the truss boom; one end of the tensioning mechanism is connected with a boom tail of the truss boom; the other end of the tensioning mechanism is supported by the support rod and is connected with a boom head of the truss boom; the support rod and the tensioning mechanism are arranged on the side, far from a crane, of the truss boom. The boom rack provided by the invention has the advantages of high carrying capacity and long service life.

A rotating electric machine has a drive control part and a motor having a stator and a rotor. The drive control part has an external disturbance voltage instruction generation part, a switching signal generation part, first and second drive circuits, a current acquisition part detecting an external disturbance current flowing in three phase winding in each of a first coil and a second coil of the stator, and a phase angle estimation part detecting a phase angle of the rotor of the motor based on the detected external disturbance current. The drive control part adjusts turn-on/turn-off timings of switching signals so as to reduce a timing difference between corresponding line external disturbance voltages in the three phase windings more than the time difference without performing the timing adjustment while maintaining a duty ratio of these line external disturbance voltages to that when the timing adjustment is not performed.

The invention relates to the technical field of segmented girder lifting devices, in particular to a segmented girder lifting device. The segmented girder lifting device comprises a transverse frame,a first support and a second support; a second fixing block is arranged in the middle of the transverse frame, a pull ring is arranged at the upper end of the second fixing block, and a first hook isarranged at the lower end of the second fixing block; first fixing blocks are fixedly welded to the upper end of the first support and the upper end of the second support respectively; and stretchingassemblies are arranged on the first support and on the second support respectively. The segmented girder lifting device is reasonable in structural design; when a segment girder needs to be hoisted,the device is wound on the segmented girder through ropes, then the ropes are stretched by the stretching assemblies on the first and second supports and the first hook at the lower end of the secondfixing block, finally the transverse frame is stretched through a hoisting machine, and then the segmented girder is lifted; and due to the fact that multiple stretching points are arranged on the ropes, the stress balance of the segmented girder in the hoisting process and the stability during ascending are improved.