34results about How to "Achieve precise guidance" patented technology

The invention relates to the technical field of office appliances, and discloses an external rotary pulling-connecting pen. The external rotary pulling-connecting pen comprises a front pen holder device and a rear pen holder, wherein one end, outside the front pen holder device, is movably connected with the rear pen holder in a sleeving mode; the front pen holder device comprises a pen head; oneend of the pen head is fixedly connected with a pen holder; a locking fixing slot is formed in the outer part of the pen holder; a return slope is arranged on the side wall of the locking fixing slot;an isolating flow-dividing plate is fixedly mounted on the outer surface of the pen holder; and one end of the isolating flow-dividing plate is fixedly connected with an auxiliary buckle. According to the external rotary pulling-connecting pen disclosed by the invention, the locking fixing slot and a fixed blocking slot can realize positioning a use state and a non-use state of the fixed buckle,so that stability of the device is improved; and the locking fixing slot is mutually matched with the auxiliary buckle, so that position guide is conveniently performed on the fixed buckle, and the fixed buckle can accurately enter the fixed blocking slot and the locking fixing slot, and therefore, convenience of the device is improved.

The invention discloses a slit-type variable aperture based on air bearing guidance; the front panel of the device is equipped with 2 X-direction drive control units, 2 Y-direction drive control units, 2 X-direction support guide units, 2 Y-direction support guide unit and diaphragm window; 2 gravity compensation units are installed on the back panel; the diaphragm window consists of 2 X-direction diaphragm plates, 2 Y-direction diaphragm plates, 2 X-direction driven air bearing guide rails and 2 A Y-direction driven air bearing guide rail; the paired units are rotationally symmetrical with respect to the optical central axis oo' of the system; the device includes 4 support guide units based on the air bearing principle, guiding the 4 driven guide rails, and passing through The drive control unit and the gravity compensation unit control the four diaphragm plates respectively, and the diaphragm plates connect end to end to form a coplanar rectangular window, and finally realize scanning in any range in the plane; the invention establishes a high-precision , High stability air bearing guided slit iris.

The invention provides a large-scale array electrically-tunable antenna phase shifter transmission. The large-scale array electrically-tunable antenna phase shifter transmission comprises a driving assembly. The driving assembly comprises a driving motor. The driving motor is connected with a left transmission screw and a right transmission screw through a gear transmission mechanism. A transmission nut is arranged on each transmission screw. A positioning mechanism is arranged on one transmission screw and nut, and the driving motor drives the transmission screws to rotate through the transmission mechanisms so as to drive the transmission nut to move on the transmission screws. A frame-type transmission rod is of a frame-type structure. The transmission nut is connected with the frame-type transmission rod through a connecting arm. The frame-type connecting rod is provided with a plurality of connecting parts used for being connected with the phase shifter and guiding and fixing parts of the connecting rod. The phase shifter transmission device has the advantages of being more compact in structure, small in size, small in thickness, light in weight, small in transmission error and the like, and phase shifting synchronization of multiple paths of phase shifters can be achieved.

The invention relates to a horizontal wheel rail gnawing preventing device for a two-force rod system. The technical scheme is as follows: the device comprises four two-force rod mechanisms with the same size and structure, and the four two-force rod mechanisms are symmetrically fixed on four corners of a bridge girder (1). Each two-force rod mechanism is composed of a fixed frame set and a horizontal wheel set, wherein the fixed frame set comprises a box-shaped fixed frame (2), a pressing frame (3) and a compression spring (15); the horizontal wheel set comprises a horizontal wheel (4), a bearing (8), an eccentric transparent cover (9), an adjustable pad (10), a wheel axle (12) and a shaft sleeve (13). The box-shaped fixed frame (2) is fixed on web plates at two sides of the bridge girder (1); the pressing frame (3) slides inside the box-shaped fixed frame (2) through the compression spring (15); and the horizontal wheel (4) is fixed on the pressing frame (3) through the bearing (8), the wheel axle (12) and the eccentric transparent cover (9). By using the horizontal wheel rail gnawing preventing device, the precise guide for the operation of a crane is realized; and a track (5) is in flexible contact with the horizontal wheel (4), thus the wheel rail gnawing phenomenon is effectively avoided. The horizontal wheel rail gnawing preventing device has the characteristics of simple structure, easiness for maintenance, strong stability and long service life.

The invention discloses a medical three-dimensional positioning guider for an orthopedic surgery. The medical three-dimensional positioning guider is provided with two measuring systems comprising a static measuring unit and a dynamic measuring unit; an azimuth angle and a sagittal angle can be measured in real time in various environments; the static measuring unit provides a relatively static reference coordinate system for the dynamic measuring unit; the medical three-dimensional positioning guider is always perpendicular to the skin of a patient; deviation cannot be caused even if the patient moves; medical staffs can obtain real-time accurate position information; and the success rate of the orthopedic surgery and other surgeries is increased. By using the portable three-dimensional positioning guider for the orthopedic surgery, position conditions of an instrument can be displayed in real time, the medical staffs can accurately determine the sizes of the sagittal angle and the azimuth angle between the position of the instrument and the skin of the patient clinically, and accurate guiding is realized; and the medical three-dimensional positioning guider for the orthopedic surgery can be calibrated in real time, and various human errors are avoided.

The invention discloses an online maintainable axial flow check valve which is characterized in that a top opening is formed in the top of a valve body, a valve spool component is placed into the valve body from the top opening, a valve cover is arranged at the top opening of the valve body to seal the valve body, a valve spool of the valve spool component is suspended on a valve spool support by a supporting rib, and the valve spool support is fixedly clamped at the top opening of the valve body by the aid of a valve spool fixing clamp ring. The online maintainable axial flow check valve is low in flow resistance and noise, and can realize online maintenance.

The invention discloses an auxiliary set of laryngoscope blades, which is characterized in that it comprises a front movable assembly, a main body shell, a rear end shell assembly and a knob assembly; the main body shell includes an outer arc portion, an inner arc portion and a semicircle part, the outer arc part and one side of the inner arc part are correspondingly spliced ​​to form a channel cavity for accommodating the intubation tube and the blade of the laryngoscope, and the two ends of the channel cavity are respectively a narrow opening and a wide opening; A gap window is reserved between the outer arc portion and the other side of the inner arc portion, and the intubation tube and the blade of the laryngoscope enter the channel cavity through the gap window. The invention realizes the precise guidance of the intubation through the front movable assembly on the blade auxiliary kit of the laryngoscope, significantly improves the success rate of intubation, and at the same time reduces the discomfort caused by the contact between the intubation tube and the patient's soft palate.

An external rotary pulling-connecting pen, comprising a front pen holder device (1) and a rear pen holder (2), wherein the rear pen holder (2) is movably sleeved on an end outside of the front pen holder device (1); the front pen holder device (1) comprises a pen head (101) and a sleeve spine (102), and the sleeve spine (102) is fixedly connected to the rear end of the pen head (101); a buckle protruding inward is fixed to the inner side of the rear pen holder (2); a locking fixing slot (103) is formed in the outer part of the sleeve spine (102); a return slope (104) is formed on the side wall of the locking fixing slot (103); a pair of isolating flow-dividing plates (105) are provided on the outside of the sleeve spine (102); a guiding movable channel is formed between the pair of isolating flow-dividing plates (105); and an auxiliary buckle (106) is fixedly connected to one end of the isolating flow-dividing plates (105). In the described external rotary pulling-connection pen, the use state and a non-use state of a fixed buckle may be positioned by means of the locking fixing slot and a fixed blocking slot, so that stability of the device is improved. The locking fixing slot and the auxiliary buckle match each other so that position guiding is performed on the fixed buckle, thereby improving the convenience of the device.

A punch die indexing mechanism of a numerical control press comprises a rack, a rotating shat is mounted on the rack through a bearing device, an upper die frame, a press plate frame and a lower die frame are rotationally connected to the rotating shaft from top to bottom in sequence, a punch die seat is fixedly mounted at the tail end of the lower die frame, the punch die seat is provided with a plurality of punch dies, the upper die frame is provided with corresponding punch rods at the positions exactly facing the punch dies, and the punch rods are fixedly mounted on a fixing seat at the tail end of the upper die frame. The bottom of the lower die frame is fixedly connected with a movable plate, a piston rod of a longitudinal shifting oil cylinder is mounted in a mounting hole of the movable plate through a bearing, and the shifting oil cylinder is fixedly connected to the rack. The upper die frame is fixedly connected with a locating plate, the locating plate is provided with an arc groove, a locating column is in sliding connection with the arc groove of the locating plate, and the locating column is fixedly connected to the rack. A piston rod of a press plate oil cylinder is hinged to the press plate frame, and a cylinder body of the press plate oil cylinder is fixed to the upper die frame. The punch die indexing mechanism of the numerical control press can meet the punching requirements for different hole diameters and is simple in structure, convenient to operate and stable in operation.