37results about How to "Change travel distance" patented technology

The application discloses a novel pressure maintaining valve, comprising: a valve body, an air inlet and an air outlet are formed on the valve body, and a gas cylinder release channel is formed in the valve body; a valve assembly is arranged in the valve body, and the valve assembly includes a valve stem and the piston, the piston is provided with a through groove, and the bottom end of the piston is provided with a sealing gasket; the screw sleeve is threadedly connected to the valve body, the screw sleeve passes through the through groove and is opposite to the air outlet, and the screw sleeve is provided with a bushing, a guide sleeve and a first spring, the guide sleeve is provided with a sealing ring, the first spring is pressed against the guide sleeve, the bushing covers the guide sleeve, and the guide sleeve is provided with a guide opening, and the guide opening adjusts the moving position through the movement of the sleeve; and The limiting part is arranged at the air outlet of the valve body, the bottom of the piston is provided with a plurality of support arms, and the limiting part can force the support arms to press against the bottom of the piston. The application can ensure the tightness of the pressure-holding valve after long-term use, improve the gas tightness in the pressure-holding valve during installation, and can flexibly adjust the gas outflow rate when the gas is released, so as to flexibly adapt to various application scenarios .

The invention discloses an anti-hanging partition wall of a super high-rise building and a construction method thereof, and relates to the technical field of an anti-hanging partition wall of a super high-rise building, in particular to an anti-hanging partition wall of a super high-rise building, which includes a bottom groove plate and a chute. The left and right sides of the inside of the bottom trough are equipped with position adjustment mechanisms, and a limit clamping mechanism is installed above the bottom trough, and a spine keel is installed above the limit clamp, and the spine keel The middle part is connected with a double-ended threaded rod, and the front and rear ends of the double-ended threaded rod are connected with fixing nuts. The anti-hanging partition wall of the super high-rise building is equipped with a position adjustment mechanism. The hand wheel lever pushes the wheel frame to move along the vertical centerline of the column frame until the roller is pushed out of the column frame, and the bottom groove plate is adjusted to a suitable height. , the rollers can provide auxiliary movement for the anti-hanging partition wall, can effectively improve the flexibility of the anti-hanging partition wall movement, and can adjust the anti-hanging partition wall to a suitable position.

The invention discloses an expanding type breathing apparatus. The expanding type breathing apparatus includes an oxygen bottle, a back frame, a breather pipe, straps, a rotating buckle structure, longitudinal adjustment mechanisms, telescopic rods and expansion elastic bodies. According to the expanding type breathing apparatus, positioning plates are slidably connected into expansion grooves ofa back plate in a clamped mode through the telescopic rods on one sides, the expansion elastic bodies are connected to the telescopic rods in a sleeving mode and are located in the expansion grooves,and both ends of the expansion elastic bodies are elastically squeezed between the inner walls of the expansion grooves and driving plates, so the expansion elastic bodies squeeze the driving plates towards the middle to drive the telescopic rods and the positioning plates to move to the middle. According to different shoulder widths, the positioning plates and the telescopic rods can be stretchedto the outside to adapt to the different shoulder widths.

The invention belongs to the technical field of mechanical stepping control on fluid power sources and particularly relates to an automatic reversing type bidirectional stepping piston. The automatic reversing type bidirectional stepping piston comprises a stepping piston cylinder, an annular piston and a stepping piston shaft, wherein the annular piston is sleeved with the stepping piston cylinder and moves in the middle of the stepping piston cylinder; the stepping piston shaft penetrates through the stepping piston cylinder and the annular piston and moves in the stepping piston cylinder and the annular piston; a return gas port and an advancement gas port are arranged on the stepping piston cylinder; retaining pins are arranged on the stepping piston cylinder and the annular piston; springs are arranged behind the retaining pins; four one-way retaining sliding grooves are evenly and circumferentially formed in the stepping piston shaft; the adjacent one-way retaining sliding grooves are arranged oppositely; arc-shaped sliding grooves are formed in two ends of a distribution range of the one-way retaining sliding grooves; and retaining steps are arranged at bottoms of the arc-shaped sliding grooves. The bidirectional stepping piston mainly solves the problem about mechanical stepping of the fluid power sources, has the advantages of capability of realizing accurate stepping control and automatic opposite movement, simple structure, small size, large thrust, low cost, low technical difficulty, good stability and durability, good practicability and the like, can also be deemed as a stepping jack, has a very large application room in the field of mechanical control, and is easy to popularize.

The invention relates to an annular cylinder rotor engine which consists of a rotor and a stator, wherein the space between the rotor and the stator is an annular combustion chamber; the rotor is provided with 8 pistons which are divided into two groups and do gradual trade off rotations in the annular combustion chamber; the annular combustion chamber is divided into 8 cylinders by the pistons; during running, when one group of pistons go forward, the other group of pistons stand still to ensure that the volume of one group of cylinders in the annular combustion chamber is reduced, while thevolume of the other group of cylinders is increased, and the volumes of the two groups of cylinders change so as to realize 4 strokes; in the 8 cylinders, the strokes of every two opposite cylinders are the same; and expansive force is transmitted to a gear crankshaft through a connecting component in the rotor and then transmitted to an output shaft through the gear crankshaft so as to ensure that the output shaft continuously rotates.

The invention discloses a large-stroke actuator based on piezoelectric ceramic driving and belongs to the technical field of actuators, which matches the work by arranging a piezoelectric ceramic pile, a slider and a stroke amplifying unit and drives the slider to move based on the reverse piezoelectric effect of a piezoelectric ceramic body; then, the movement of the slider is converted into a relative rotation of two connecting rods in the stroke amplifying unit; after that, the stroke of the slider is amplified and transmitted to an inserting-pulling member through a stroke amplifying mechanism to complete inserting / pulling process of the inserting-pulling member. The actuator in the invention is simple in structure, easy to set; the sliding stroke of the slider can be greatly enlargedthrough the stroke amplifying mechanism; the whole process is simple in control, strong in recoverability and high in precision; the change of the stroke driving distance of the actuator can be realized by changing the setting number of the stroke amplifying unit and / or the sliding distance of the slider, thereby greatly improving the compatibility of the actuator, achieving large stroke control of the actuator, and having a good promotion and application value.

The invention provides a miniature guiding rail for a large-scale printer. The miniature guiding rail comprises an arc-shaped plate, a sliding plate, a sliding groove, a base, lug bosses, a plastic holding frame, heat-dissipating through holes, a plurality of steel balls, a supporting rod, a sliding rail, a groove, an insertion pile, a sliding block, a limiting block, a flange bearing, an insertion block, a gear rack, a gear, a rotating shaft, a bearing, a rotating plate and screws, wherein the sliding groove is formed in the base; inward-concave first concave strips are correspondingly arranged on the left and right side walls of the interior of the sliding groove; the plastic holding frame is arranged in the sliding groove; the lug bosses are correspondingly mounted on the left and right sides of the bottom of the plastic holding frame, and positioned on the sliding groove; the lower bottom surfaces of the lug bosses cling to but are not fixedly connected with the upper bottom surface of the sliding groove; the steel balls are correspondingly mounted on the left and right sides of the plastic holding frame; and the sides, close to the base, of the steel balls are embedded in the first concave strips in the base. The miniature guiding rail provided by the invention has the advantage that the moving distance of the sliding plate can be changed.

The invention relates to the technical field of medical treatment, and discloses a self-testing bracelet for uremia hemodialysis internal fistula. The self-testing bracelet comprises wrist straps, wherein a fixing plate is movably connected between the wrist straps and supports a display panel, and the display panel is movably connected to the surface of the fixing plate. Through cooperative use of a massage block, a limiting plate and a first connecting rod, the massage block is capable of massaging the acupuncture points of the arm, so that the bracelet is more comfortable to use; the movingdistance of the massage block can be changed, the massage degree is changed, and automatic adjustment can be conducted according to different requirements; through cooperative use of the display panel, a pointer, a first gear and a second gear, a blood transfusion tube can be displayed when deviating in the dialysis process, observation can be conducted visually, and medical staff can be remindedto conduct treatment; and through cooperative use of a movable polar plate and a fixed polar plate, an alarm cannot be triggered when the blood transfusion tube moves within a controllable range, andan alarm prompt can be triggered when the maximum deviation is reached.