30results about How to "Large pressure area" patented technology

The embodiment of the invention discloses a scaffold integral movement type platform comprising a bearing base. Limiting clamping grooves are formed in the outer walls of the left side and the right side of the bearing base correspondingly. A limiting frame connected with the bearing base in a sliding manner is arranged in each limiting clamping groove. Limiting clamping covers are arranged on thelower portion of the bearing base. An installation cover is arranged in each limiting clamping cover. A regulation assembly is arranged inside each installation cover. The device is provided with theinstallation covers. When the device is fixed, a user can rotate regulation lead screws, supporting columns can then drive supporting tables to be pressed on the ground, and therefore the device downward pressing area is enlarged, and the situation that as slide wheels are stuck in moist soil, the device is not stably fixed and safety of workers is accordingly threatened is avoided. Meanwhile, when the supporting columns slide, stepped inclined blocks can be driven by sliding clamping ring stands, and therefore the slide wheels can be clamped by pressing blocks, and even when a self-locking mechanism on the device goes wrong as the device is used for a long time, the device can also be normally fixed, and the protection effect of the device is high.

A case in which a vehicular power transmitting apparatus is stored, has: an annular support portion which surrounds an outer periphery of a planetary gear set and supports a fixed element from among a plurality of gears and a carrier of the planetary gear set; an outer peripheral wall portion that surrounds the annular support portion; a flange portion that forms a mounting surface on an outer portion of the outer peripheral wall portion; and a dividing wall portion which extends to the outside from the annular support portion toward the outer peripheral wall portion and the flange portion, and which forms the flange portion and the mounting surface and divides spaces within the case. A joining portion, in which a fastening hole to which the fastening member is joined and whose axis passes through the dividing wall portion is formed, is integrally formed with the dividing wall portion.

A pentagonal velocity-averaging tube flowmeter test rod is suitable for the field of a flow measuring instrument. The shape of the cross section of the test rod is an axisymmetric pentagon in the flow direction of fluid. An inflow angle is arranged at a water meeting side. Furthermore the angle-of-attack and two flow meeting edges which form the angle-of-attack constitute a high-pressure chamber of which the cross section is triangular. Flow opposing edges at two sides and the flow opposing bottom edges of the pentagon form a quadrangular low-pressure chamber. High-pressure sampling holes are distributed at the angle-of-attack. Low-pressure sampling holes are next to a connection portions between the flow opposing edges and a middle baffle plate. The flow meeting edges are linear. The value range of the angle-of-attack is 0-180 DEG. The distances between the low-pressure sampling holes and a wake zone is changed through increasing the length of a wake edge, thereby reducing an influence of a wake-zone whirlpool to the low-pressure sampling holes, and realizing a more stable flow coefficient. The shape of each pressure sampling hole has an elongated groove shape. A pressure sampling area increase, a relatively small effect to an output pressure difference and a relatively good anti-blockage performance are realized. The pentagonal velocity-averaging tube flowmeter test rod has advantages of simple structure, greatly reduced requirement for a producing process, and greatly reduced production cost.

The invention relates to the technical field of sewing machines, and discloses a sewing machine with a hand pressing prevention device. The sewing machine is characterized in that a buffer assembly ismounted at one end of a sewing machine body, the upper surface of a presser foot is in threaded connection with a fastening bolt, the rear surface of the presser foot is in sliding connection with anextendable plate, a limiting block fixedly connected to one end of the extendable plate is further slidably connected into the presser foot, and compacting assemblies are mounted on the two sides ofthe upper surface of the extendable plate correspondingly. According to the sewing machine, the periphery of the sewing machine body can be shielded through a shielding frame, the sewing machine bodyis prevented from being damaged by external force, meanwhile, the sewing machine body can be subjected to dustproof treatment through the shielding frame, and follow-up use is easy; and a certain buffering effect can be achieved in the pressing-down process of the presser foot through the buffer assembly, when fingers of a user make contact with the bottom of the presser foot, the hands of the user can be protected through elastic deformation of a second spring, a third spring and an air bag, and the fingers of the user are prevented from being crushed by the presser foot.

The invention provides a buckle structure for installing a rear rack of a bicycle, comprising a fixing body, a rotating body and a fixing piece, wherein the fixing body comprises a fixing part and a first tip part positioned at the free end of the fixing part, and the first tip part is provided with a first through hole; the rotating body comprises a rotating part and a second tip part positioned at the free end of the rotating part, and the second tip part is provided with a second through hole; and the fixing piece comprises a screw rod, a nut, a handle and a gasket, a ring is arranged at one end of the screw rod, the handle comprises a handlebar as well as a left stator and a right stator which are symmetrically arranged at two sides of the front end of the handlebar, a third through hole is formed in the middle part of the left and right stators, and the other end of the screw rod is tightened and fixed by the nut. The buckle structure provided by the invention has the positive effects of convenience in installation and disassembly, reasonable design and high safety coefficient and is worthy of being popularized and applied.

The invention provides a pressure generation device which is simple in structure, compact in size, small in noise and convenient to produce. The pressure generation device comprises a fixed element arranged in a fluid and a moving element moving relative to the fixed element, wherein the opposite inner side surfaces of the moving element and the fixed element are contacted or smaller gap is formed between the opposite inner side surfaces of the moving element and the fixed element, and the outer side surfaces of the moving element and the fixed element are both contacted with the fluid. The invention further provides a pressure generation method which is easy to implement and produces small noise. When the moving element moves relative to the fixed element, the action force, applied by the fluid on the outer side surface of the moving element, on the moving element is smaller than the action force, applied by the fluid on the outer side surface of the fixed element, on the fixed element, so that the fluid can generate pressure on the pressure generation device.

The invention relates to the technical field of packaging material production and processing tools, in particular to a rapid edge cutting device for a corrugated board, and aims at solving the technical problems that an existing device is poor in cutting capacity, low in cutting precision and not safe enough in use. In order to solve the above technical problem, the invention provides the rapid edge cutting device for the corrugated board. The rapid edge cutting device for the corrugated board is composed of a cutting device, a smoothing device and a transmission device; through the cutting device, the rapid edge cutting device for the corrugated board can effectively deal with the corrugated board with hard paper surface material and thick thickness, the adaptability is high, the cutting effect is good; and through the smoothing device, the paper surface of the corrugated board can be smoothed, the pressing area on the surface of the corrugated board is larger, the cutting action is more stable, the cutting quality is better; and through the transmission device, a first saw blade and a second saw blade are clamped in an O-shaped structure defined by swing arms in a surrounding mode, the contact probability between the first saw blade and the second saw blade and external objects is reduced, the problem of collision and damage is avoided, and use is safer.

The present invention relates to the technical field of cementing tools in the oil drilling industry, in particular to a floating hoop shoe and its use method. The floating hoop shoe includes a shell, and a valve seat is arranged in the inner cavity of the shell from bottom to top and a spool assembly, the spool assembly includes a spool and a spring sleeved above the side wall of the spool, the other end of the spring is fixed in the inner cavity of the housing, and the spool includes a valve The core body, the valve core body is provided with a semi-closed flow channel in the axial direction, the side wall is provided with a first through hole communicating with the flow channel, and the end of the flow channel away from the valve seat is connected to the housing. lumen. The floating hoop shoe provided by the invention can improve the switching efficiency of the valve core, effectively reduce the tremor generated when the mud flows, and ensure the process stability.

The invention discloses a rotary multi-environment AOI detecting device and a rotary multi-environment AOI detecting method. The rotary multi-environment AOI detecting device comprises a plurality ofscreen detecting stations, a detecting light source, a screen moving device, an image acquisition device and a data processing device, wherein each screen detecting station is configured to have different detection environments suitable for detecting specific screen defect types; the screen moving device moves detected screens to the screen detecting stations synchronously; the image acquisition device acquires all-station images of the detected screens at respective current screen detecting stations, so that each image contains a plurality of image regions corresponding to different screen detecting stations; the screen moving device moves the detected screens to the respective next screen detecting stations after each image acquisition; and the image acquisition device re-conducts the image acquisition in the next round of multiple detection environments until the detected screens traverse detection of the different detection environments. The rotary multi-environment AOI detecting device and the rotary multi-environment AOI detecting method greatly improve the utilization rate of the image acquisition regions, and reduce the requirements for image acquisition environments.

The invention relates to a nested wet dual clutch device. The carrier hub has a flange portion extending in a radial direction from an outer circumferential surface thereof. The flange portion has a hub axial extension extending in an axial direction. A carrier including a first carrier and a second carrier is connected to the flange portion by a hub axial extension extending in an axial direction. The radii of the hub axial extension and the carrier axial extension substantially correspond to each other. An outer circumferential surface of the first piston axial extension slides along an inner circumferential surface of the carrier axial extension in the first compensation chamber, and an inner circumferential surface of the first piston axial extension slides along an outer circumferential surface of the rear guide cylinder in the first pressure chamber. The outer circumferential surface of the second piston inward axial extension slides along the inner circumferential surface of the hub axial extension in the second pressure chamber, and the inner circumferential surface of the second piston inward axial extension slides along the outer circumferential surface of the front guide cylinder in the second compensation chamber.

A press-type dental high speed turbine handpiece comprises a shell with an inner cavity, a mandrel penetrating through the shell and a turbine and two bearings which are arranged in the shell, wherein the turbine and the bearings are installed on the mandrel in a sleeving mode, and the turbine is arranged between the bearings; one end of the shell serves as a sealing end, one end of the mandrel penetrates out from the sealing end, and a bearing installation seat of one bearing is machined in the inner cavity of the shell; the other end of the shell is sealed through a detachable cover, the other end of the mandrel penetrates out from the cover, and a bearing installation seat of the other bearing is machined in the cover; the shell is provided with an air port for enabling the inner cavity of the shell to be communicated with the outside. According to the press-type dental high speed turbine handpiece, the pressing area is large, force applying is accurate and stable, the problem that in the prior art, part contact is instable is solved, machine needle clamping and replacing are convenient, and the clamping stability is high.

The invention discloses a root curved face sealing structure of a deep-sea waterproof conduit female joint. The structure is arranged at the tail end of an internal thread of the female joint and consists of an inner wall, an arc face and an inclined end face. The inclined end face is an inner orifice end face, and the end face is inclined outwards relative to the flat end face of the inner orifice. The inner wall is a circular hole inner wall parallel to the axis, and the inner wall and the inclined end face are connected through a cambered face protruding outwards, so that the curved face sealing structure is formed. The root curved face sealing structure of the deep-sea waterproof conduit female joint is designed into the curved face, so that stress release is facilitated, and the cracking probability of the female joint after screwing is reduced. In addition, the area of the inclined end face in the curved face sealing structure is larger than that of a conventional flat end face,the pressing area of a matched sealing ring can be increased by screwing in pairs, and the sealing performance of the curved face sealing structure is improved.

The invention relates to a pressing device of an uncoiler. The pressing device comprises a connecting rod connected with a piston rod in a rotating mode, the connecting rod is fixedly connected to oneside of a rotating shaft, the two ends of the rotating shaft are located in first bearings, and bases are arranged at the bottoms of the first bearings; supporting plates are fixedly connected to theparts, located between the first bearings, of the two sides of the rotating shaft, a transverse plate is arranged between the supporting plates, and one end of the transverse plate penetrates throughone supporting plate; and a motor and an auxiliary supporting plate are arranged on the transverse plate, a main fixing shaft is arranged between the tops of the supporting plates, and a main compression roller is arranged in the part, located between the supporting plates, of the main fixing shaft. According to the pressing device of the uncoiler, an auxiliary compression roller capable of beingflexibly used is additionally arranged on the basis of the original main compression roller, so that the pressure applying area of an outer fixer is increased; the auxiliary compression roller can beadjusted according to the types of auxiliary rings in load-bearing bearings, and power-enhancement of the auxiliary compression roller can also be achieved independently through the motor, so that the friction effect is improved; and pressure sensors which are in signal connection with a control box are correspondingly arranged in the main compression roller and the auxiliary compression roller,and therefore, the compression condition of the compression rollers can be measured in real time, and real-time adjustment is realized.