80results about How to "Reduced fit requirements" patented technology

The invention provides a winding machine. The winding machine comprises a stand column, a winding machine base, a rotary mechanism and a membrane frame, wherein the bottom of a stand column shell main body is hinged with the winding machine base through a first connection piece, and the stand column shell main body and the winding machine base are connected through a first stand column cover plate and a second stand column cover plate to form a column shape; the winding machine is provided with a stand column bottom inner side connection piece and the inner side connection piece is provided with a stand column outline sizing surface; the stand column is internally provided with a hoisting device supporting frame; the lower end of the supporting frame is connected with the bottom inner side connection piece; the upper end of the supporting frame is connected with a top mounting rack of a hoisting device; a bottom mounting rack of the hoisting device is connected with the bottom inner side connection piece; all the parts are connected by using bolts or screws; and a groove opening for hoisting movement is reserved on the stand column shell main body between the first stand column cover plate and the second stand column cover plate. The winding machine disclosed by the invention is reasonable in structure; a main body structure of the stand column can be assembled in a manufacturing factory by using the bolts or the screws and is hinged with the winding machine base, so as to avoid welding operation; and the winding machine is beautiful in appearance and is applicable to installation and debugging, and transportation.

The invention relates to a control valve for an oil atomizer. The control valve comprises electromagnets, a sealing bolt pin, electromagnet springs, an armature, an armature guide rod, control valve bases, a restriction orifice and an oil atomizer body. The control valve is characterized in that the sealing bolt pin is arranged in inner holes of the control valve bases; a high-pressure sealing face is formed by the outer circle surface of the sealing bolt pin and the inner holes of the control valve bases; a valve chamber is defined by the sealing bolt pin, the control valve base and the restriction orifice and is communicated with a control chamber through an oil outlet path; the sealing bolt pin is in rigid connection with the armature guide rod and is pressed on a supporting face at the upper end of the restriction orifice under downward elastic force of the electromagnet springs; a closed portion is arranged on the lower end face of the sealing bolt pin; a high-pressure sealing face is formed by the supporting face of the lower end of the closed portion and the supporting face of the upper end of the restriction orifice; a blind hole is formed in the center of the restriction orifice; an oil returning cavity is formed between the blind hole and the lower end face of the sealing bolt pin and is communicated with an oil returning channel. The control valve can be closed only through small spring pre-tightening force.

The invention discloses a mahjong machine which comprises a base plate, panels, mahjong lifting support plates, a mahjong shuffling plate, mahjong taking and conveying mechanisms and a mahjong pushing and lifting mechanism. Four mahjong taking and conveying mechanisms and four mahjong lifting support plates are installed on a conveying base which is an integrally-formed part provided with four groups of positioning and installing portions. The four groups of positioning and installing portions are centrally symmetrical, each group of positioning and installing portions comprises a conveying and installing portion, a panel installing portion and a guiding shaft seat portion, wherein the conveying and installing portions and the mahjong taking and conveying mechanisms achieve positioning and are locked and fixed through fasteners, and the top ends and panels of the panel installing portions achieve positioning. The guiding shaft seat portions are arranged on the outer sides of the conveying and installing portions, two guiding rods under the mahjong lifting support plates are respectively and vertically inserted into two shaft holes of the guiding shaft seat portions, and the mahjong pushing and lifting mechanism pushes the mahjong lifting support plates to lift. By means of the technical scheme, the panels and the mahjong lifting support plates are positioned on the same part, accordingly the matching requirement of the panels and the mahjong lifting support plates is guaranteed, machine adjustment is decreased, the matching accuracy is improved, and the deformation influence is reduced.

The invention discloses an automatic gearbox which comprises an input shaft, a first planetary gear mechanism, a second planetary gear mechanism, a third planetary gear mechanism, an output shaft, a first clutch, a second clutch, a third clutch, a fourth clutch and a second brake. A first gear ring is connected with the input shaft, a first planetary frame is fixedly connected with a gearbox shell, a second planetary frame is fixedly connected with a third planetary frame, the output shaft is fixedly connected with a second gear ring and a third gear ring and parallel to the input shaft, the first clutch is freely connected with the input shaft and a third sun gear, the second clutch is freely connected with the input shaft and a second sun gear, the third clutch is freely connected with a first sun gear and the second sun gear, the fourth clutch is freely connected with the first sun gear and the second planetary frame, the second planetary frame is freely fixed to the gearbox shell by the aid of the second brake, and transmission gears are determined according to the connecting state of two fastening mechanisms. The automatic gearbox is more compact in structure and wider in speed ratio range, and is provided with more gears and at most provided with twelve forward gears and one reverse gear.

The invention relates to a revolving shaft with a muffling cam, comprising a staddle, a concave wheel, a cam and a plurality of spring plates, which are arranged in sequence on the revolving shaft; one end of the revolving shaft is fixedly connected with a fixing bracket, the other end thereof is tightly fixed by screw caps, wherein a muffling piece is arranged between the cam and the spring plate, at least three arc grooves are arranged on the external circumference of the muffling piece in an evenly distributed manner, at least three tongue pieces are arranged on the external circumference of the cam, which are assembled with the three arc grooves. The muffing piece is added between the cam and the spring plate on the revolving shaft and the muffing piece and the cam are tightly assembled into a whole by the tongue pieces and the grooves; in the way, the matching demand between the cam and the revolving shaft is lowered, thus reducing the requirement on the manufacturing precision of the cam and lowering the cost. The muffling piece is manufactured by pressing, is easy to process and manufacture and can be exactly assembled with the cam, thus realizing the effect of eliminating the abnormal sound.

The invention discloses a robust iris region segmentation method based on specific boundary detectors, which comprises the following steps: S1, constructing a left and right inner boundary, left and right outer boundary and upper and lower eyelid boundary iris specific boundary training data set and a candidate feature set; S2, constructing the six iris specific boundary detectors by using a cascaded self-adaptive learning algorithm; S3, positioning an iris inner boundary by utilizing the left and right inner boundary detectors and weighted Hough transform; S4, positioning an iris outer boundary by utilizing the left and right outer boundary detectors and the weighted Hough transform; and S5, positioning an upper eyelid boundary by utilizing the upper and lower eyelid boundary detectors and a robust least square method. By utilizing the robust iris region segmentation method, an iris effective area can be accurately segmented in an iris image containing a lot of noise, so that the accuracy, the robustness and the usability of an iris identification system are improved. The robust iris region segmentation method can be widely applied to various application systems for identity recognition and security defense by using iris recognition.

The invention provides a thread trimming mechanism of a sewing machine and belongs to the technical field of machines. The problem that the cooperative stability of an existing tread trimming mechanism of the sewing machine is poor is solved. The thread trimming mechanism of the sewing machine comprises a thread trimming knife, a swing rod driving piece, a swing rod and a thread trimming cam, wherein the swing rod is hinged to the sewing machine, and the thread trimming cam can rotate. The swing rod is located between the thread trimming cam and the swing rod driving piece, a transmission structure is arranged between the swing rod and the thread trimming knife, and the transmission structure can drive the thread trimming knife to swing and trim thread when the swing rod swings. The thread trimming cam is in a sleeve shape or in a columnar shape, a cam surface is arranged at one end of the thread trimming cam, the swing rod abuts against the cam surface, and when the thread trimming cam rotates, the swing rod can swing around the hinged point under the action of the cam surface.

The invention discloses a caster seat for adjusting a ground clearance. The caster seat for adjusting the ground clearance comprises a rotating handle, a rotating groove, a screw seat, a screw rod, a wheel axle and a rubber wheel, wherein the rotating handle is connected with the rotating groove through a pin shaft; the rotating groove is connected with the screw rod through a pin shaft; the screw rod is a cylinder; the screw rod is connected with the screw seat through an external thread; the outer wall of the screw seat is welded on a seat sleeve; the outer wall of the seat sleeve is provided with a guide sleeve; the upper end of the guide sleeve is welded with a cover plate I; the lower end of the guide sleeve is welded with an L-shaped support; a fixed seat is welded on the side wall of the guide sleeve; the L-shaped support is welded together with the wheel axle; and the rubber wheel is fixed on the wheel axle through a nut and a cover plate. According to the invention, through tightening the rotating handle, the cylindrical screw rod is driven by the rotating handle to rotate, the rotation motion of the screw rod is converted into up-and-down motion and the distance between the bottom end of the screw rod and the seat sleeve is vertically adjusted so that the clearance between a trolley and the ground is adjusted. Therefore, the caster seat for adjusting the ground clearance has the advantages that the structure of the caster seat is simple, the operation of the caster seat is convenient, the caster seat realizes a guiding function, the efficiency is increased, labor is saved, the safety factor of the caster seat is high, and the caster seat also realizes wide practicability.

The invention relates to a method for uniformly polishing an optical device. The method comprises the steps of 1, putting a planetary wheel into a polisher; 2, putting the optical device into a machining cavity, wherein the machining cavity is formed in a polishing hole of the planetary wheel and can freely rotate relative to the polishing hole; 3, starting polishing, wherein the planetary wheel rotates with a driving wheel of the polisher and has the rotation speed w1, the machining cavity rotates with the planetary wheel and the optical device and has the rotation speed w2, and w1 is not equal to w2. According to the technical scheme, in the polishing process, the grinding paths which all parts of the optical device pass by are basically the same.