3502 results about "Sliding contact" patented technology

The present invention mainly relates to the technical field of cable stripping. Disclosed are a cable stripping device and a stripping method. The cable stripping device comprises a sleeve and a first rotary disk, the first rotary disk being radially provided with several support rods, each support rod being rotatably connected to a roller in rolling contact with the side surface of a cable, and to a cutting blade used in cooperation with a cable sheath. The cable stripping device further comprises a second rotary disk, the second rotary disk being provided with arc-shaped grooves in sliding contact with the support rods. One end of the first rotary disk is provided with a center shaft rotatably connected to the sleeve, and protrusions are symmetrically provided at one end of the center shaft; a base is provided with an annular groove in a circumferential direction and a helical groove in communication with the annular groove; and the protrusions sequentially slide on the annular groove and the helical groove, thus respectively driving the cutting blades to move on the surface of the cable in a circumferential direction and helically in an axis direction. The beneficial effects of the present invention lie in: solving the problem of inconvenient stripping in existing stripping devices, and improving the cable stripping efficiency and effect.

A vacuum pump, which is connectable to an external system and configured to evacuate material from the external system, includes a main housing defining a motor housing, a pump housing, and a partition wall that separates the motor housing and the pump housing. The pump housing is sealed relative to the motor housing to form a compression chamber that holds a lubrication fluid. The vacuum pump further includes a motor assembly that is positioned within the motor housing and a pump assembly that is positioned within the compression chamber. The pump assembly is driven by the motor assembly and is in fluid communication with the compression chamber. The pump assembly includes a pump chamber, a rotor having vanes that is driven within the pump chamber, and a seal that is in sliding contact with the rotor. The seal is moveable relative to the rotor.

A top toy being is provided. The top toy is used together with a field including a step part and an acceleration rail being configured on the step part. The top toy includes a rotating shaft extending in an axial direction, a rotor being concentric with the rotating shaft, and a ride-over part being configured on the rotating shaft above the rotor. The rotating shaft includes a landing part on a bottom end thereof. The rotor is configured to engage with the acceleration rail. The ride-over part includes an axially symmetrical sliding contact surface. The sliding contact surface has a diameter increasing as extending upwardly in the axial direction.

A rotary electric shaver includes a head connected to a blade setting base of a main body. The blade setting base has a setting part in which a plurality of blade units are disposed, and a blade frame that holds the setting part. An inner blade part of the blade unit has an inner blade member, and a base part joined to the inner blade member. An outer blade part of the blade unit has an annular outer blade member having a sliding contact surface and a plurality of slits formed in the circumferential direction, a disk-shaped cover, a ball, and a support. A part of the ball surrounded by the cover and the support protrudes from the cover.

The utility model relates to the field of circuit breakers, in particular to an electromagnetic locking molded case circuit breaker. Comprising a housing including a mounting seat and a cover plate; an electromagnet is arranged in the first side wall of the mounting seat and is electrically connected with the contact system; the cover plate comprises a front panel and a second side wall; a magnetic attraction sliding part sliding front and back is installed in the second side wall, a first sliding abutting part is arranged at the front end of the magnetic attraction sliding part, and a first inclined face is arranged on the first sliding abutting part. A locking rod is arranged in the front panel, a reset spring is arranged on the locking rod, a second sliding abutting portion abutting against the first inclined face is arranged on the rear side of the locking rod, a second inclined face is arranged on the second sliding abutting portion, and the second inclined face abuts against the first inclined face. The operating mechanism comprises a release handle, and a locking hole matched with the locking rod is formed in the release handle; the locking rod prevents the release handle from rotating when external force is received, and the electromagnet attracts the magnetic attraction sliding part to achieve reinforced fixation between the installation base and the cover plate.

A quantitative glue dispensing device for an end surface of a cigarette paper tube of a granular heated cigarette, comprising: a drum (2) which receives cigarette paper tubes (1) by using cigarette slots (21), a glue pool (3) encircling a drum body and comprising built-in glue dispensing head assemblies (4) being provided at a position above the cigarette slots (21), and filter tip ends of the cigarette paper tubes (1) being exposed upward and always located directly below glue transfer rods (43) in a corresponding set of glue dispensing head assemblies (4); and a cam (6), a circular groove (61) that is concave upward and coaxial with the drum (2) being formed on a bottom end surface of the cam (6) to come into sliding contact with the tops of the glue transfer rods (43), such that the glue transfer rods (43) rotate synchronously with the drum (2) and repeatedly switch between a glue replenishing position (611), a "0" position (612), a glue dispensing position (613), and a transition position (614) in sequence, thereby implementing quantitative glue dispensing, automatic cleaning after glue dispensing, and automatic glue replenishment after cleaning of the cigarette paper tubes (1). The device can implement annular-patterned glue discharge with an adjustable glue dispensing volume, can be automatically sealed after glue dispensing, can implement quantitative glue dispensing and the like, thereby improving the product quality and production efficiency.

The present invention relates to a slide system (1) comprising a first slide member (10) having a slide surface (14) at least partly coated with a lipophilic composition coating (18) to provide a slide layer (19) with lowered friction, and a second slide member (20) arranged in sliding contact with the slide layer (19) at an interface to provide a slide system (1). The interface between the slide layer (19) and the second slide member (20) forms a plain bearing to allow for sliding movement of the second slide member (20) relative to the first slide member (10). At least the slide surface (14) of the first slide member (10) is made of a first plastic, and at least a part of said second slide member (20) being in sliding contact with the slide layer (19) is made of a second plastic. The first and the second plastics are different plastics. The invention further relates to a method for providing said slide system (1).

A toy for figure play includes: a base member including an annular cam; a rotation shaft erected on the base member such that a first axis of the rotation shaft is positioned on an inner side of the annular cam; and a seesaw member provided on the rotation shaft so as to be rotatable around a second axis perpendicular to the first axis of the rotation shaft. The seesaw member includes: a cam follower part configured to be in sliding contact with the annular cam; and a figure accommodation part configured to accommodate a figure.

The invention belongs to the technical field of digital printing machines, in particular to an anti-deviation device for a guide belt of a digital printing machine, and provides the following scheme that the anti-deviation device comprises a mounting frame, a guide roller is rotationally arranged on the mounting frame, the guide belt is rotationally arranged on the guide roller, a first electric guide rail is mounted on the mounting frame, and the first electric guide rail extends in the moving direction of the guide belt; a movable frame is connected to the first electric guide rail and extends in the direction perpendicular to the first electric guide rail, two suction cup boxes capable of horizontally moving are arranged on the movable frame, the tops of the suction cup boxes are in sliding contact with the bottom of the guide belt, and sensing units are arranged at the two ends of the movable frame. The suction cup box drives the guide belt to move in the direction away from the sensing unit sending the signals, suction of the suction cup box is cut off until the sensing unit stops sending the signals, deviation correction is achieved through movement of the suction cup box at the bottom of the guide belt, and the situation that the printing operation effect is affected due to wrinkles of the guide belt is effectively avoided.

The present invention belongs to the technical field of oil extraction and provides a sand fracturing wellhead device, comprising a main pipe, a branch pipe connected to the side of the main pipe, a mounting ring slidably installed in the branch pipe, and a second telescopic member fixedly installed in the branch pipe to drive the mounting ring to move, the mounting ring and the branch pipe are coaxially arranged and the outer side of the mounting ring is in sliding contact with the inside of the branch pipe, a first filter is fixedly installed in the mounting ring, and a temporary storage box is provided on the branch pipe, the temporary storage box is located on the outside of the branch pipe and a storage box and a connecting groove are fixedly installed at both ends of the temporary storage box, and the connecting groove is connected to the branch pipe. Compared with the prior art, the beneficial effects of the present invention are as follows: impurities on the first filter screen will fall off the first filter screen due to speed reasons, and at the same time, the oil flowing into the connecting groove will drive the impurities that have fallen off the first filter screen into the temporary storage box, thereby achieving the cleaning of impurities on the first filter screen, and the cleaning of the first filter screen can be achieved without stopping the transportation of oil.

The invention relates to the technical field of laser welding, and provides welding equipment for tricycle battery processing and production, the welding equipment comprises a rack, a welding module, a lifting module and a parallel adjusting module, a laser welding end in the welding module is fixedly arranged at one end of a moving frame, and a spring is connected between the moving frame and a vacuum suction nozzle; the lifting module comprises a lifting frame, a telescopic piece and a pressure applying protrusion, the moving frame penetrates through the lifting frame, the parallel adjusting module comprises a welding position adjusting part, a feeding driving part and a horizontal feeding part, the other end of the moving frame can make contact with an L-shaped frame, a transmission gear in the feeding driving part is fixedly connected with a sleeve, and the L-shaped frame is arranged on the surface of the sleeve in a sleeving mode. The surface of the driving shaft is movably sleeved with the sleeve, the transmission gear can be in transmission connection with the horizontal feeding part, the lower portion of the discharging shell makes sliding contact with the upper surface of the horizontal feeding part, an inclined rail, a Z-direction rail and a swing guide piece are arranged on the side face of the jig, and the welding device has the beneficial effects that the welding quality is good, and manual intervention is reduced.

A bridge crane comprises a guide rail, a trolley, a current collector, a sliding contact line, a lifting component and a cleaning component, the trolley is movably assembled on the guide rail, the sliding contact line is connected with the trolley through the current collector, the current collector is assembled on the sliding contact line in a sliding mode, and the lifting component is connected with the trolley through the lifting component. The lifting component and the cleaning component are assembled on the trolley, and the cleaning component is used for cleaning the sliding contact line. The bridge crane has the technical effects that stains and dust accumulated on the sliding contact line can be cleaned in time in the working process, accidents are avoided, and the production efficiency and convenience are improved.

The utility model provides a spinning top toy set and a spinning top toy. The spinning top toy set and the spinning top toy can enable the spinning top toy to perform novel actions. The spinning top toy set comprises a stadium provided with an acceleration guide rail at a step part formed on the stadium; and a gyro toy in which a rotating body is provided concentrically with a rotating shaft having a ground contact portion formed at a lower end thereof, the gyro toy being accelerated by moving back and forth when the rotating body is engaged with the acceleration guide rail, the gyro toy being provided with a raising portion directly above the rotating body, the rising part is provided with an axially symmetric sliding contact surface, the lower end of the sliding contact surface has the same shape as the upper end of the rotating body, the diameter of the sliding contact surface is expanded along with the upward direction in the axial direction, and the rising part is configured in a way that the sliding contact surface is in sliding contact with the upper corner of the step part and can rise to the upper side of the step part through the back-and-forth movement of the top toy; in the raised state, the grounding part is not grounded with the floor on the lower side of the step part, and the rotating body can be clamped with the acceleration guide rail.

The utility model relates to the field of cutting equipment, and discloses a slide rail assembly for a cutting machine, which comprises a rail piece and a slide block piece, rail parts are arranged on two sides of an inner groove of the rail piece, the slide block piece is in sliding fit with the rail parts, the slide block piece comprises a base and a movable block, and matching surfaces clamped with the rail parts are arranged on the outer sides of the base and the movable block. The rail piece and the sliding block piece are in sliding fit through the matching faces, a sliding layer used for contact fit is arranged on the matching faces, an adjusting block is arranged between the base and the movable block and used for adjusting the distance between the matching faces on the two sides of the base and the matching faces on the two sides of the movable block, and the rail piece and the sliding block piece are in sliding fit through the matching faces to obtain a large sliding contact face, so that sliding fit is more stable; on the basis, sliding fit is smoother through the self-lubricating sliding layers on the fit surfaces, meanwhile, the distance between the fit surfaces is allowed to be adjusted through an adjusting block through the design of the sliding block piece, it is ensured that the sliding block piece can be accurately installed in the rail piece, and the fit clearance can be adjusted during follow-up maintenance.

The utility model relates to the field of mobile phone production equipment, in particular to mobile phone frame automatic grabbing equipment which comprises a transplanting mechanism and a grabbing mechanism, the transplanting mechanism comprises a rack, a transverse moving assembly arranged on the rack and a vertical moving assembly arranged on the transverse moving assembly; the grabbing mechanism comprises two sets of gas claws arranged at intervals and clamping claw assemblies correspondingly arranged on the gas claws. The clamping jaw assembly comprises two groups of mounting seats, mounting grooves formed in the mounting seats, rotating rods which are rotationally mounted on the mounting grooves in a front-back symmetrical manner, abutting rods which are arranged on the side surfaces of the rotating rods and can abut against the mobile phone frame, and limiting assemblies which are arranged in the mounting grooves and limit the rotation of the rotating rods; the end parts of the rotating rods are in sliding contact with the mobile phone frame; during material grabbing, the end of the rotating rod makes contact with the mobile phone frame and moves on the mobile phone frame, then the abutting rod abuts against the area where the rotating rod passes through, then the mobile phone frame is clamped, and the technical problem that in the prior art, the grabbing precision and the quality of the mobile phone frame are affected by sweeps is solved.

The invention belongs to the technical field of oil exploitation, and provides a sand-prevention fracturing wellhead device which comprises a main pipe, the side face of the main pipe communicates with a branch pipe, a mounting ring is slidably mounted in the branch pipe, and a second telescopic part for driving the mounting ring to move is fixedly mounted in the branch pipe. The installation ring and the branch pipe are coaxially arranged, the outer side face of the installation ring is in sliding contact with the interior of the branch pipe, a first filter screen is fixedly installed in the installation ring, a temporary storage box is arranged on the branch pipe and located on the outer side of the branch pipe, a storage box and a communicating groove are fixedly installed at the two ends of the temporary storage box respectively, and the communicating groove communicates with the branch pipe. Compared with the prior art, the device has the following beneficial effects that impurities on the first filter screen can be separated from the first filter screen due to the speed, meanwhile, petroleum flowing into the communicating groove can drive the impurities separated from the first filter screen to enter the temporary storage box, and cleaning of the impurities on the first filter screen is achieved; and the first filter screen can be cleaned without stopping petroleum conveying.

The invention belongs to the technical field of garbage treatment, and particularly relates to a separation device suitable for garbage classification and recovery, and the separation device comprises a treatment box, a filter cylinder is arranged in the treatment box, and an extrusion cylinder is arranged in the filter cylinder; the filter cartridge is horizontally and rotatably arranged in the treatment box, and the center positions of the two ends of the filter cartridge are communicated with rotating pipes; the outer walls of the two extrusion cylinders are in sliding contact with the inner wall of the rotating pipe, and the extrusion cylinders horizontally reciprocate in the filter cylinder along the rotating pipe; the top end of the treatment box is detachably connected with a box cover, and the bottom ends of the two sides of the treatment box communicate with a plurality of drainage pipes. Water on the periphery of accumulated garbage is separated and removed through centrifugation, and meanwhile, the extrusion barrels at the two ends horizontally reciprocate along the inner wall of the rotating pipe, so that centrifugal rotation and garbage extrusion operation can be carried out at the same time, and the operation effect of separating and removing the water in the accumulated garbage is improved.

The invention discloses a metro equipment mounting system, and relates to the technical field of metro equipment, the metro equipment mounting system comprises a collector shoe mounted on a metro vehicle chassis and a contact rail mounted beside a metro rail, a shoe body of the collector shoe is in sliding contact with the contact rail, and the collector shoe comprises a supporting seat and a swing arm arranged on the supporting seat; a spring mechanism is further arranged between the swing arm and the supporting seat, a shoe body is arranged at the end, away from the supporting seat, of the swing arm, the swing arm is connected with the shoe body through a base plate, and the base plate is arranged on the swing arm in a swing mode. In the jumping stroke of the shoe body, the base plate drives the shoe body to swing; the shoe body is arranged on the base plate capable of swinging, when the shoe body jumps, swinging of the base drives the shoe body to swing together, the inclination angle is gradually increased, and in the process that the shoe body is away from the contact rail, one side of the shoe body can basically keep in the state of making contact with the contact rail in the direction perpendicular to the advancing direction of a subway.

A hub is provided for a human-powered vehicle. The hub includes a hub axle, a first rotating body, a second rotating body, a first ratchet member, a second ratchet member and a slider. The first rotating body and the second rotating body are rotatably mounted on the hub axle. The first ratchet member rotates with the first rotating body. The second ratchet member rotates with the second rotating body. The slider rotates with the first rotating body and slide with respect to the second rotating body in a circumferential direction. The slider has a first contact surface in sliding contact with an axially facing surface of the second ratchet member. The slider has a second contact surface in sliding contact with a radially facing surface of the second ratchet member.

The invention relates to the technical field of pelvic minimally invasive surgeries, and particularly discloses a device for establishing a pelvic crista iliaca external fixation frame screw channel, which comprises a sleeve I and a sleeve II sleeved on the inner side of the sleeve I. A conical tip and a probe with a blunt bottom are further arranged in the sleeve I. The probe is slidably sleeved on the conical tip. The side wall of the probe is in sliding contact with the inner side wall of the sleeve II; the top of the conical tip is fixedly provided with a hand cone, the hand cone is sleeved with a first annular shell in a sliding and sealing mode, the outer side wall of the first annular shell is fixedly sleeved with a second annular shell, and the outer side wall of the second annular shell is in sliding contact with the inner side wall of the first sleeve; a plurality of through holes are formed in the side wall, close to the bottom, of the first annular shell. According to the device, the conical tip, the probe and the sleeve are integrally designed, meanwhile, on the operation level, medical staff only need to continuously push the handle downwards and finally hold the handle to pull out the handle, a pelvic crista iliaca external fixation screw channel can be established, and the efficiency of establishing the screw channel is greatly improved.

The invention relates to the technical field of curtains, in particular to a sectional type transmission rack for an electric curtain, each transmission unit comprises a rack body and a conductive assembly, and the rack body is provided with a first positioning mechanism; a second positioning mechanism used for preliminarily positioning the rack body and the curtain frame and a locking mechanism used for locking the rack body and the curtain frame are arranged between the rack body and the curtain frame, the conductive assembly comprises a sliding contact line clamped in the rack body, and the end of the sliding contact line is provided with a conductive connector used for being in conductive contact with the sliding contact line of the adjacent transmission unit; the rack bodies of the adjacent transmission units are inserted and positioned through the first positioning mechanism to complete splicing, the adjacent sliding contact lines are conducted through the conductive connectors, and therefore transmission racks of different length specifications are formed through splicing, and the transmission racks and the curtain frame are fixed through the second positioning mechanism and the locking mechanism to form curtain rails of different length specifications. The traditional processes of field measurement, cutting, secondary assembly and the like are omitted, and the transportation cost is reduced.

A sealing arrangement for detecting thickness (t) of a sealing element (2) of a seal (1) wherein the sealing surface (3) at frontside of the sealing element (2) is arranged to be in sliding contact with sealed surface (4), wherein at least one sensor (5) measures the thickness of the sealing element (2) and is mounted to the surrounding component (10) of the sealed surface (4). The sensor (5) is positioned opposite the sealing element (2). The sensor (5) receives a response from a transverse border of the sealing element (2) or from an electrically conductive insert (6) or from an insert (6) of magnetic material, which insert (6) is embedded within the sealing element (2) or is connected to the backside of the sealing element (2). The thickness (t) is detected and / or measured along the length of the sealing element (2).

The invention relates to a transporting device capable of being used for transporting mushroom charging baskets, and solves the technical problems that when an existing agaricus bisporus collecting device is used for collecting picked agaricus bisporus, manpower is consumed, efficiency is low, and the collecting quantity is small. First walking bottom wheels are connected to the bottom of the first frame, the first walking bottom wheels and the first guide rails roll in a matched mode, a first walking motor used for driving the first walking bottom wheels to rotate is connected to the first frame, a sliding contact line is arranged on the outer side of the first guide rails, and a carbon brush and a first displacement assembly driving the carbon brush to make electrical contact with the sliding contact line are arranged on the first frame. The mushroom collecting efficiency and the automation level are improved, and the higher intelligent operation requirement is met.

The invention belongs to the technical field of natural gas pipelines, and particularly relates to a self-compensation device for a metal sealing ring of a high-pressure natural gas pipeline. An outer connecting sleeve is fixedly connected to the exterior of a first pipeline, and a wear-resistant mechanism is mounted between a first inner connecting sleeve and a second inner connecting sleeve; the space between the first sealing ring and the packing sealing plate and the space between the second sealing ring and the packing sealing plate are filled with rigid packing, and the space between the first sealing ring and the second sealing ring is filled with flexible packing; a first toothed plate is fixedly connected to the exterior of the inserting plate, a sliding rod is slidably connected to the inner side of the translation groove, a clamping mechanism is installed at one end of the sliding rod, and a positioning mechanism is installed at the other end of the sliding rod; according to the device, rolling friction of balls is adopted to replace sliding contact, high-pressure vibration abrasion is greatly reduced, rigid-flexible double-filler combination elastically responds to deformation, continuous pressing of a sealing face is maintained, internal pressure impact is resisted through the right-angle toothed plate meshing self-locking design, and zero-leakage stable connection under the extreme working condition is achieved in combination with three-stage insertion rod positioning and bolt fastening.

The invention provides conveying equipment for surgical interventional therapy of congenital heart diseases, and belongs to the field of medical equipment. Comprising a guide pipe, a traction pipe and a conveying pipe, the upper end and the lower end of the guide pipe are open, the conveying pipe is located in the traction pipe, a sealing plate is fixedly connected to the lower end of the inner surface of the guide pipe and makes sliding contact with the outer surface of the traction pipe, and a conveying assembly is arranged at the upper end of the conveying pipe; the conveying assembly comprises a fixing sleeve fixedly connected with the upper end of the outer surface of the conveying pipe. By arranging the conveying assembly, a support is clamped and fixed through a contact plate, the support is stored and placed in a guide pipe, a good protection effect on the support in the conveying process can be achieved, and therefore the probability that the support falls off accidentally in the conveying process can be reduced; and therefore, the stability and the safety of the conveying equipment in the working process can be effectively improved.

The invention discloses durability test equipment for an automobile sealing strip, and relates to the technical field of sealing performance testing, the durability test equipment comprises a cylindrical shell, extrusion wheels are correspondingly arranged on the two sides of the cylindrical shell, the two extrusion wheels located on one side of the cylindrical shell are symmetrically arranged up and down, and an electric telescopic rod is installed on one side of each extrusion wheel. A fixing frame is connected to one end of the electric telescopic rod, tightening discs are correspondingly arranged on the two sides of the cylindrical shell, tightening ropes are wound around the tightening discs, clamping heads are installed at one ends of the tightening ropes, the extrusion wheels are driven by external torque to rotate, and rotating shafts are rotatably installed on the inner wall of the cylindrical shell in an up-down corresponding mode; a contact ball is fixedly installed outside the rotating shaft, an annular groove is formed in the middle of the contact ball, connecting shells are correspondingly and fixedly installed on the upper inner wall and the lower inner wall of the cylindrical shell, openings are formed in the bottoms of the connecting shells, and the bottoms of the connecting shells are in sliding contact with the annular groove.

The utility model relates to the technical field of metering tanks, in particular to a stirring type metering tank which comprises a stabilizing seat and a supporting rod which are fixedly connected, and the end, away from the stabilizing seat, of the supporting rod is fixedly connected with a tank body. The feeding hopper is fixedly arranged on the upper side of the tank body; the stirring mechanism is mounted on the upper side of the tank body, and the power output end of the stirring mechanism is arranged in the tank body; the cleaning mechanism is mounted on the tank body, and the power output end is in sliding contact with the inner wall of the tank body; the metering mechanism is mounted on one side of the tank body; the discharging pipe is fixedly arranged on the lower side of the tank body and used for guiding out materials in the tank body, the discharging pipe is made of a transparent material, and scales are arranged on the discharging pipe; and the control panel is mounted on one side of the tank body. The stirring type metering tank provided by the utility model not only can be used for storing and metering materials, but also can be used for fully stirring the materials, meanwhile, the inner wall of the stirring type metering tank can be conveniently cleaned, and the stirring type metering tank is simple to operate and high in practicability.

The utility model relates to the technical field of balance valves, in particular to a waste gas flow adjusting balance valve which can achieve balance of a flashboard, enables flow of a waste gas conveying channel to be adjusted and kept stable, and is good in practicability. Comprising a valve body, rotating shafts and flashboards, the valve body is in a square cylinder shape, the two gate plates are rotationally installed in the valve body through two rotating shafts, the edges of the two gate plates make sliding contact with the inner wall of the valve body, the piston cylinder is installed on the outer wall of the valve body and is close to the input end of the valve body, the left end of the piston cylinder is communicated with the input end of the valve body, and the right end of the piston cylinder is communicated with the output end of the valve body. The piston plate is installed in the piston cylinder in a sliding mode, the double-face rack is installed on the outer wall of the valve body in a sliding mode and connected with the piston plate, the two gears are concentrically installed on the two rotating shafts respectively and meshed with the double-face rack of the double-face rack respectively, one end of the spring is connected with the double-face rack, and the other end of the spring is connected with the outer wall of the valve body.

A spool valve includes a sleeve having a plurality of ports, and a spool arranged inside the sleeve and having a land formed so as to be brought into sliding contact with inner walls of the sleeve. A depression is formed in the land over an entire circumference.

The invention discloses an automatic numbering machine and a complement printing system, and the automatic numbering machine comprises a core shaft which is connected to a base; the character wheel is rotationally connected to the outer portion of the mandrel, a plurality of printing numbers are arranged on the outer side of the character wheel, and a plurality of locking grooves opposite to the printing numbers in the radial direction are formed in the inner side face of the character wheel; the axial positioning lock is positioned in the mandrel and is provided with a top lock wedge capable of axially moving and an ejector pin in sliding contact with the top lock wedge; and when the top lock wedge is driven to axially move, the ejector pin radially extends out of the mandrel and is clamped in the lock groove or radially retracts and retreats from the lock groove. According to the invention, the problem of irregular printing numbers in the process of complementing and printing small banknotes by a large-piece complementing machine can be solved.