7results about How to "Increase the compression area" patented technology

The present application relates to the technical field of plunger pump, in particular to a variable stroke double cavity plunger pump, which comprises a shell and a driving motor, two delivery pipes are arranged in the shell, two groups of crankshaft assemblies are arranged on the output shaft of the driving motor, the shell is connected with the corresponding delivery pipe through the crankshaft assembly, and a first one-way valve and a second one-way valve are symmetrically arranged in the delivery pipe along the axis of the crankshaft assembly; the one-way valve comprises a reset assembly, a sealing assembly and a clamping assembly arranged in sequence from top to bottom, the sealing of the sealing assembly is realized by the elastic extension of the reset assembly and the adhesion of the clamping assembly; the sealing assembly on the first one-way valve is provided with a first negative pressure assembly, the sealing assembly on the second one-way valve is provided with a second negative pressure assembly, and the first negative pressure assembly and the second negative pressure assembly are oppositely arranged; by arranging the negative pressure disc and the connecting pipe, the stress area of the sealing ball under the negative pressure condition is increased, the opening speed is accelerated, and the fluid passing efficiency is improved.

The utility model provides a non-invasive breathing machine face pressure sore prevention pad, relates to the technical field of auxiliary medical equipment, and aims to solve the problem of face pressure sores caused by a breathing mask in the prior art, and the non-invasive breathing machine face pressure sore prevention pad comprises a pressure prevention pad body, the pressure-resistant pad body comprises a first pad body attached to the nose bridge and two second pad bodies attached to the left face and the right face, the first pad body is bent towards the upper sides of the second pad bodies, and the two second pad bodies are connected to the left side and the right side of the first pad body respectively. And the two second pad bodies are symmetrically arranged relative to the center line of the first pad body. The face pressure sore prevention pad of the noninvasive ventilator can play a role in protecting the nose bridge and the cheeks at the same time, the relative displacement can be reduced through the integral structure, and the positioning effect is good.

The utility model belongs to the technical field of electric pump devices, and particularly relates to a five-in-one electric pump assembly applied to a full-active suspension of a vehicle, which comprises a controller, two bidirectional internal gear pumps and two motor assemblies, the motor assembly comprises two motors, the two-way internal gear pump is connected to the ends of the motors, the controller is arranged above the two motors, a motor shaft extending out of the motor assembly is coaxially provided with a pentagonal spline, the pentagonal spline comprises five outer acting surfaces and an outer transition surface, and the outer acting surfaces are arc-shaped surfaces protruding outwards; an inner pentagonal hole matched with the pentagonal spline in an engaged mode is coaxially formed in an outer gear of the two-way internal gear pump. The electric pump is used for solving the technical problems that a motor and a pump in an existing electric pump are in transmission connection through a flat key or an involute spline, the positioning gap and the repeated impact resistance are poor, and the response capacity to real-time flow is affected.

The utility model relates to the field of rotary milling machines, in particular to a vertical adjusting mechanism for an enveloping worm rotary milling machine, which comprises an upright post, a support plate fixed on the top surface of the upright post, an oil cylinder fixed on the support plate, a sliding seat fixed at the end part of a piston rod of the oil cylinder, a tailstock fixed on the sliding seat and a tailstock fixed on the tailstock, the bottom end of the tailstock is rotationally connected with a rotating rod, a connecting part is fixed to the bottom end of the rotating rod, a plurality of elastic metal sheets are distributed on the top face of the connecting part at equal intervals, a gap is reserved between every two adjacent elastic metal sheets, and the elastic metal sheets are gradually expanded outwards from bottom to top. Through the arrangement of the elastic metal sheet and the like, on one hand, the pressing effect is improved, and the damage to the pressed place is greatly reduced due to the increase of the pressing area; on the other hand, the friction force between the elastic metal sheets and the inner wall of the insertion hole is greatly increased, and the stability of the cutter head in the high-strength machining process of the worm through the cutter head is guaranteed.

The utility model relates to a container aluminum profile machining device, include: bed body, frock table, first air cylinder, pressing plate, gantry, electric spindle, compression piece and tool bit, the plane is formed with above bed body, multiple frock tables horizontal arrangement and be located above the plane of bed body, frock table is fixed with bed body and can dismantle and connect, first air cylinder is located frock table horizontal side and is fixedly connected with bed body, the piston rod of first air cylinder is fixedly connected with pressing plate, pressing plate below is fixedly connected with compression piece, two compression pieces are located above frock table longitudinal both ends respectively, gantry is connected with bed body and slides and moves relative to bed body longitudinally, electric spindle is connected with gantry, and electric spindle drives tool bit rotation. The utility model's frock table longitudinal length is greater than aluminum profile, can process a complete lateral surface after once clamping, and the number of clamping and processing is less, improves the processing accuracy, reduces the work load, improves work efficiency.

A water conservancy slope protection net, including strip fixed plate, positioning plug, U-shaped positioning plate, positioning plug rod, fixed shaft rod, positioning stand, rotating pressing plate, magnetic sheet, U-shaped clamping plate, the lower part of the strip fixed plate is connected with the positioning plug, three positioning plugs are evenly distributed in the lower part of the strip fixed plate, the side of the positioning plug has an auxiliary plug, three auxiliary plugs are evenly distributed in the shaft side of the positioning plug, the lower surface of the strip fixed plate is attached to the side skin, the lower part of the U-shaped positioning plate is connected with the strip fixed plate, the U-shaped positioning plate has a strip sliding hole, the positioning plug rod is adapted to the strip sliding hole, the positioning plug rod is inserted into the strip sliding hole, the positioning plug rod slides in the strip sliding hole, the lower part of the positioning plug rod has a plug rod lower disc, the upper surface of the plug rod lower disc is attached to the U-shaped positioning plate, and the lower surface of the plug rod lower disc is attached to the strip fixed plate.

The utility model discloses an inner hexagonal screw fastener which comprises a tightening head, one end of the tightening head is fixedly connected with a pressing piece, the other end of the tightening head is provided with a hexagonal groove, a groove is formed in one end of the tightening head, a fastening rod is fixedly connected to the middle position of the interior of the groove, a connecting plate is arranged in the groove, and the other end of the tightening head is fixedly connected with the hexagonal groove. The surface of one side of the connecting plate is fixedly connected with a rubber sealing cylinder, the outer surface of the rubber sealing cylinder is attached to the surface of the inner wall of the groove, the rubber sealing cylinder is connected to the outer side of the fastening rod in a sleeving mode, an avoiding hole is formed in the middle of the connecting plate, and the avoiding hole is connected to one end of the fastening rod in a sliding and sleeving mode; the surface of one side of the connecting plate is fixedly connected with a magnet block, the magnet block is magnetically attracted to the upper end of the interior of the groove, one side of the magnet block is fixedly connected with a fixing head, combined sealing can be achieved after pressing and fixing, threaded positions are prevented from being rusted, disassembly and replacement are convenient, adaptability is high, and use safety is improved.