6results about How to "Symmetrical force" patented technology

This invention belongs to the field of medical device technology and discloses a foot pressure relief device for diabetic foot. It includes a base, a pressure relief plate and a motor connected to the base, and a foot pedal and a transmission assembly connected to the pressure relief plate. The transmission assembly includes a crank, a first connecting rod, and a sliding seat. The crank is fixedly connected to the output shaft of the motor, and the sliding seat is connected to the pressure relief plate. The two ends of the first connecting rod are respectively connected to the crank and the sliding seat. The sliding seat is connected to a foot rolling shaft and a second connecting rod, and the second connecting rod is connected to a foot massage roller. A buffer spring is provided between the pressure relief plate and the base. The foot pedal has a through groove, and the foot rolling shaft is connected to a foot massage roller. This invention utilizes the foot rolling shaft / foot massage roller and the foot massage roller to simultaneously perform rolling massage on the sole and instep of the foot. The periodic oscillation of the pressure relief plate causes the heel and toes to alternately rise, resulting in good pressure relief for the foot.

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

The utility model belongs to the technical field of electric tools, and particularly relates to a tong head device and a handheld tool. The handheld tool comprises a tong head device and a driving device, wherein the tong head device comprises a tong head mounting component; the first plier body and the second plier body are rotationally arranged on the plier head mounting component, and the front ends of the first plier body and the second plier body form a plier opening; the synchronous rotating mechanism is used for realizing synchronous rotation of the first clamp body and the second clamp body; wherein the synchronous rotating mechanism comprises a tooth-shaped sliding block, a first tooth part, a second tooth part, a third tooth part and a fourth tooth part, and the tooth-shaped sliding block is arranged on the tong head mounting component in a sliding manner; and the second tooth part is meshed with the tooth-shaped sliding block. The first plier body and the second plier body are meshed on the two sides of the tooth-shaped sliding block through the first tooth part and the second tooth part respectively, so that synchronous opening or closing of the first plier body and the second plier body is achieved, and the synchronous plier has the advantages of being good in synchronism, more symmetrical and stable in stress and the like.

This invention provides a screw pump, an oil production system, an oil production method, a storage medium, and electronic equipment, belonging to the field of petroleum extraction technology. The screw pump includes a stator and a rotor. The rotor has an arc-shaped structure that is large at both ends and small in the middle, and is symmetrical. The stator also has an arc-shaped structure that is small at both ends and large in the middle, and is symmetrical. The rotor is located inside the stator. The inner surface of the stator and the outer surface of the rotor have the same curvature. Both the inner surface of the stator and the outer surface of the rotor are threaded surfaces. The threaded surfaces of the stator and rotor cooperate with each other to allow the rotor to rotate within the stator, forming a pump cavity between the stator and the rotor. The pump has low overall leakage, high efficiency, and high head. The symmetrical pump cavity formed between the stator and the rotor results in almost equal flow rates in each cavity, leading to uniform filling of the symmetrical pump cavities. This results in symmetrical force on the pump body, high overall wear resistance, and a long service life.

The invention relates to an installation construction method for a fan installation ship and the fan installation ship. The theoretical leg insertion range is determined according to geological data, and all the pile legs are lowered to the seabed surface and then sink by means of self weight, so that the pile legs are preliminarily in place. The pile is actively pressed for the first time, and pressure is maintained after staged loading of the pile leg, so that soil around the pile leg restores a stable state, and the settling stability of the pile leg is improved. After the platform of the fan installation ship is lifted, the weight of the fan installation ship is basically borne by the pile legs, at the moment, secondary active pile pressing enables the pile legs to be further compacted and pierce into a hard layer, and the bearing capacity is improved. Active pile pressing for the second time is achieved through staged loading of diagonal pile legs, it is guaranteed that the ship body is stressed symmetrically, and meanwhile stable transition from a soft layer to a hard layer can be dealt with; and the pressure is maintained until no further settlement exists, so that the pile leg insertion depth meets the theoretical leg insertion range. According to the method, through theoretical leg insertion range pre-judgment and two different graded loading and pressure maintaining stability, the method adapts to complex seabed geology, and the installation positioning construction reliability of the fan installation ship is improved.

The utility model belongs to the technical field of machining, concretely relates to a gear slotting clamp, including rectangular block and gear main part, be equipped with the installation groove on the rectangular block, gear main part sets up in the inside of installation groove, all are equipped with the sliding slot body on the two sides inner wall of installation groove, two sliding slot bodies all are slidably connected with the clamping piece, the first slot body is equipped with in the rectangular block, the first slot body is L type setting, the first slot body is slidably connected with the driving piece, all are equipped with the second slot body on the one side of sliding slot body, two second slot bodies are linked with the first slot body. The utility model discloses through the cooperation of L type slot body and driving piece, can drive two sides clamping piece synchronous action simultaneously, reduces the gear deviation caused by one -sided clamping, and two -way positioning can be completed in one operation, simultaneously, the rectangular plate evenly transmits the thrust to two sides clamping piece, makes the gear outer periphery force symmetry, and then increases the gear position accuracy when slotting processing, reduces the processing error caused by the clamping deformation.