109results about How to "Achieve traction" patented technology

The invention relates to equipment for automatically and accurately repairing wavy abrasions to a subway corner rail. The equipment comprises a trolley, a driving assembly and a control assembly, wherein the trolley travels on the subway corner rail; a positioning assembly for fixing the trolley on the rail, a laser distance measuring sensor (10) for detecting the wavy abrasions to the subway corner rail and a grinding assembly (8) for repairing the wavy abrasions to the subway corner rail are arranged on the trolley; the driving assembly drives the grinding assembly (8) to move in an X-axis direction, a Y-axis direction and a Z-axis direction respectively. Compared with the prior art, the equipment takes a storage battery as power, can accurately repair the wavy abrasions to the subway corner rail for a designated position and can perform reshaping simply and repeatedly; the grinding assembly can move in the rail direction and in the radial direction of the rail and can rise and fall accurately, and an included angle formed by a grinding wheel and the rail can be adjusted. The equipment has the advantages of simplicity in operation, high working efficiency, convenience in mounting and transportation, low operation cost, high grinding accuracy and the like.

The invention provides a DDoS attack defense system and method based on dynamic transformation, which break through the characteristics of traditional passive defense and static defense. The method has the basic thought that: under normal flow, a small number of proxy nodes are adopted to transmit communication between a user and an application server, so that normal communication requirements aremet, and resources are saved; and when a DDoS attack is received, a large number of dynamic proxy nodes are started to transmit communication between the user and the application server, the standbyproxy node is continuously used for replacing the attacked proxy node, the user flow is migrated to the new proxy node, and the attacked proxy node is closed, so that the DDoS attack strength is rapidly reduced, and the purpose of defending against large-flow attacks with small bandwidth is achieved. In addition, the dynamic change of the proxy node enables the attacker not to obtain the internalnetwork topology structure of the system, so that the scanning detection of the attacker on the system can be effectively blocked. The system does not increase user load, is transparent to users, andprovides continuous and stable service for the users.

The invention belongs to the technical field of electric power systems, and relates to a high-voltage charged overhead bare wire intelligent rubber-coated spraying robot. A glue injection device comprises an opening-shaped fixing seat, clamping arms fixedly mounted on both sides of the fixing seat and an injection pressure ring fixed connected to the clamping arms; a driven wheel and a plurality of second blocking wheels are respectively fixedly mounted on both outer sides of a blocking plate in a transmission device, a driving wheel is fixedly mounted on a rotating motor, a conveyor belt is installed between the driving wheel and the driven wheel, a plurality of meshing gears are evenly mounted between the two blocking plates, the second blocking wheels are fixedly connected to a rotatingshaft of the spaced gears, the driven wheel is fixedly connected with one of the gears through the rotating shaft, a cabinet below the second blocking wheels is fixedly mounted with a plurality of limit posts, and the lower portion of the blocking plates is fixedly connected with an opening-shaped base. The high-voltage charged overhead bare wire intelligent rubber-coated spraying robot solves the problem in the prior art that injecting an insulating layer robot has a poor fixing effect on bare wires, resulting in poor rubber coating effect of the bare wires and easy electric leakage.

The invention provides a railway vehicle traction system and a railway vehicle. The railway vehicle traction system comprises a permanent magnet synchronous generator, a traction converter and a permanent magnet synchronous motor. The permanent magnet synchronous generator is mechanically connected with an outer diesel engine and used for rotating under drive of the diesel engine so as to supply three-phase alternating current to the traction converter. The traction converter comprises a middle direct current circuit and a traction inversion circuit, the middle direct current circuit comprises a rectification and filter circuit, a grounding detection circuit and an input voltage and current detection circuit, all of which are sequentially and electrically connected, and the middle direct current circuit is used for supplying direct current voltage and protection to the traction inversion circuit; and the traction inversion circuit is electrically connected with the input voltage and current detection circuit and the permanent magnet synchronous motor and used for driving the permanent magnet synchronous motor, so that the permanent magnet synchronous motor drags the railway vehicle. Therefore, the efficiency of the whole traction system is improved, the installation space and the vehicle weight are reduced, and miniaturization, lightweight and low cost of the whole vehicle are achieved.

The invention discloses a rapid lead automatic production line, and belongs to the technical field of fishing articles. The rapid lead automatic production line comprises a machining table, wherein astepping motor is arranged in the machining table; the output end of the stepping motor penetrates through the top of the machining table; a turntable is mounted on the output end of the stepping motor; a plurality of winding devices arranged along the circumferential direction of the turntable are arranged on the turntable; a lead sheath base feeding device, a lead sheath base roughening device,a lead sheath feeding device, a polishing device and a finished product discharging device are sequentially arranged around the machining table; the lead sheath feeding device comprises a support frame, a lead sheath placing mechanism, a lead sheath positioning mechanism, a lead sheath cutting mechanism, a lead sheath traction mechanism and a lead sheath pressing mechanism; the lead sheath placingmechanism, the lead sheath positioning mechanism and the lead sheath cutting mechanism are arranged on the support frame along a straight line; and the lead sheath traction mechanism and the lead sheath pressing mechanism are respectively positioned on the two sides of the lead sheath cutting mechanism. According to the rapid lead automatic production line, the automatic production of rapid leadwith various sizes is realized, the manual output is reduced, the efficiency is more than ten times higher than the efficiency of manual work, and the yield is 99.99% or over.

The invention discloses a water conservancy project efficient farmland irrigation device and belongs to the technical field of water conservancy project irrigation equipment. The device comprises a moving support, a water pump arranged at the top of the moving support, a water drawing pipe connected with the water incoming end of the water pump and a water outgoing pipe connected with the water outgoing end of the water pump and connected with a connection pipe through a connection water pipe, a water diversion pipe is connected on the connection pipe, a mounting disc is set up at the top of the moving support, the top end of the water diversion pipe penetrates the mounting disc and connected with a pressurizing pump, the output end of the pressurizing pump is connected with a temporary storage pipe, the top end of the temporary storage pipe is connected with a spraying pipe through a connection hose, a spring is connected on the outer wall of the connection hose in a sleeved manner, and two ends of the spring are fixedly connected with the spraying pipe and the temporary storage pipe respectively. Water sprayed by a spraying irrigation nozzle is utilized as power to further push the same to swing, in this way, atomized water sprayed by the spraying irrigation nozzle is emitted in a wide range, so that microspray irrigation effect is improved.

The invention discloses an intelligent sweeping robot for a tiled photovoltaic power station and belongs to the field of photovoltaic panel sweeping devices. The technical problem of how to realize automatic sweeping of all photovoltaic panels on the same plane is solved. The intelligent sweeping robot structurally comprises a power supply device, a controller and a sweeping device and further comprises a secondary-primary travelling device mainly composed of a bearing primary device and a moving secondary device. A sweeping limiting sensor is arranged on the moving secondary device, and the sweeping device is assembled on the moving secondary device. The bearing primary device is provided with a traverse limiting sensor, a photovoltaic panel identification sensor, a secondary device parking sensor and a parking mechanism, and travelling assemblies of the traverse limiting sensor and the bearing primary device, a travelling assembly of the moving secondary device, the sweeping limitingsensor, the sweeping device, the photovoltaic panel identification sensor and the secondary device parking sensor are connected with the controller. The photovoltaic panels can be automatically identified, and the multiple photovoltaic panels on the same plane are swept.

The invention discloses a dynamic load sensing device for a three-point-suspension space of a tractor and a working method of the dynamic load sensing device. The dynamic load sensing device comprisesa cross beam, two longitudinal beams and three-component force sensors, wherein the cross beam and the two longitudinal beams are connected to form a n-shaped framework, the three-component force sensors are arranged in the middle of the cross beam and the bottoms of the two longitudinal beams, linkage components are respectively arranged on the front and rear sides of the three-component force sensors, the front-side linkage components are used for being connected with the tractor, and the rear-side linkage components are used for being connected with an agricultural implement; the three-component force sensors can be used for measuring the sizes of stresses in the three rectangular coordinate axes X, Y and Z and are arrayed to form a measurement array; and a first angle sensor and a second angle sensor are respectively used for measuring the pitch angles, transverse roll angles and azimuth angles of the sensing device and the tractor and converting measurement results from a coordinate system of the sensing device to a coordinate system of the tractor. According to the sensing device, the component forces of three suspension points in three directions can be simultaneously tested, so that the test of the traction force, lifting force, transverse force and moment of the agricultural implement can be realized.

The invention belongs to auxiliary safety equipment for cage elevators and relates to a cage traction falling protector comprising a traction plate and a pull bar. One end of the traction plate is movably fixed on a cage through a pin, the cage moves up and down along a guide, a coupler is disposed on one side of the traction plate, the traction plate is provided with a guide groove accommodating the pull bar, one end of the pull bar extends out of a traction plate hole in the end of the guide groove, the other end of the pull bar is provided with a stopper locating in the guide groove, the stopper is sleeved on the pull bar and fastened and limited by a nut, a spring is sleeved on the pull bar and locates between the traction plate and the stopper, and the other end of the pull bar is provided with a traction ring for connecting a wire rope. The wire rope is used for dragging the cage through the pull bar and the traction plate; when the wire rope breaks, a hook stop plate or hook plate on the traction plate deflects to hook a guide cross brace, thereby preventing falling of the cage and allowing equipment to be safer to use.

The invention discloses a direct-current self-lubricating guide resettable electromagnet, and belongs to the field of electromagnets. The electromagnet comprises an armature, an iron core, a shell, acoil, a spring, a first bushing, a second bushing, a connecting rod and an end cover, wherein the shell is of a tubular structure with an opening in one end, and a through hole is formed in the centerof the other end of the shell; the coil is coaxially installed in the shell through a coil rack, and a center hole is formed in the coil rack along the center axis; and the iron core and the armatureare coaxially arranged in the center hole of the coil rack. When the coil is powered on, the coil, the armature, the iron core and the air gap form a complete electromagnetic loop, the armature overcomes the elastic force of the spring in the iron core through electromagnetic force to move axially and attract the iron core, and the electromagnet provides traction force for an external connectionpiece; and when the coil is powered off, the electromagnetic force of the armature is zero, the armature resets under the elastic force effect of the spring, and the electromagnet completes the release function. The electromagnet has the advantages of small size, light weight, long service life and short response time, and the service life of the electromagnet can be five times or above that of atraditional direct-current electromagnet.

The invention relates to a multifunctional whole-rod type cassava precision seeder. The seeder comprises a rack, a rotary tillage ridging mechanism, a fertilizing mechanism, a stem cutting mechanism, two posture adjusting mechanisms, two erecting mechanisms, two clamping conveying mechanisms and two soil covering mechanisms. Rollers for walking are arranged at the bottoms of the two sides of the rack; the rotary tillage ridging mechanism is arranged at the front part of the rack; the fertilizing mechanism is arranged in the middle of the rack; the stem cutting mechanism is arranged at the top of the rear end of the rack; and the two posture adjusting mechanisms are arranged on the rack and correspond to the lower portion of the stem cutting mechanism. Each erecting mechanism is arranged on the rack and corresponds to the front of the corresponding posture adjusting mechanism; and each clamping conveying mechanism is arranged on the rack and corresponds to the rear portion of the corresponding posture adjusting mechanism. Each soil covering mechanism is arranged at the bottom of the rack and corresponds to the rear part of the corresponding clamping conveying mechanism. The multifunctional whole-rod type cassava precision seeder has the advantages that mechanical seeding operation improves cassava planting efficiency and seeding uniformity and accuracy, manual auxiliary seed feeding is replaced, and time and cost are saved.

The invention discloses a dedusting blackboard for junior school students. The dedusting blackboard for junior school students comprises a blackboard body; the top of the right side of the blackboardbody is fixedly connected with a supporting board; the top of the supporting board is fixedly connected with a motor; the output end of the motor is fixedly connected with a first bevel gear; and theleft side of the first bevel gear is engaged with a second bevel gear. Through cooperative use of the blackboard body, a vertical rod, a fixing block, a slide sleeve, a dust suction pipe, a fan, a dust suction head, a dust conveying pipe, a dust removing hole, a dust collection box, a dust falling box, a slide rod, the supporting board, the motor, the first bevel gear, the second bevel gear, a first connection rod, an opening, a second connection rod, a threaded sleeve, a threaded rod, a shell, a first shell, a vertical eraser, a first spring, a cross rod, a second shell, a second spring, a first connection board, a second connection board and a third spring, the problem that existing dedusting blackboards for junior school students are poor in dedusting effect is solved, and the dedustingblackboard for junior school students has the advantage of good dedusting effect.

The invention provides an on-load continuous transformer which comprises a B-shaped iron core, a primary winding and a secondary winding. The primary winding and the secondary winding are wound on three parallel cross columns of the B-shaped iron core. Each cross column consists of two sections, one section is a fixed column wound with the primary winding, and the other section is a freely-rotatable rotary column wound with the secondary winding. One end of the secondary winding is electrically connected with an electric brush fixed on the rotary column. The electric brush outputs through a conductive ring. The other end of the secondary winding extends to a rotatable winding column driven by a motor and is wound on the same and electrically connected with an electric brush fixed on the winding column. The electric brush of the winding column also outputs through a conductive ring. Without a tap switch, the on-load continuous transformer can realize continuous adjustment of the transformer ratio and completely suppress generation of electric arcs.

The invention discloses a trailer system of a skid loader. The trailer system comprises a closed hydraulic system, wherein the closed hydraulic system comprises a hydraulic pump and a hydraulic motor. The trailer system further comprises a trailer valve, wherein the trailer valve comprises a conduction position and a cutoff position, is connected to an oil inlet and an oil outlet of the hydraulic motor and is located at the cutoff position in default. According to the trailer system of the skid loader, the traction in the case that the whole machine is non-powered is simply realized through additionally arranging the trailer valve in a closed hydraulic traveling system of the skid loader.

The invention discloses a movable vibration exciter for simulating a train load and a loading method thereof. The movable vibration exciter comprises a rail mechanism, a traction device and a vibration device, the traction device and the vibration device are both movably arranged on the rail mechanism, the rear end of the traction device is hinged to the front end of the vibration device, the traction device is used for driving the vibration device to move on the rail mechanism, and the vibration device is used for generating variable-frequency excitation force to the rail mechanism. The traction device and the vibration device are arranged on the rail mechanism, the vibration device is driven by the traction device to move on the rail mechanism, variable-frequency excitation force is generated on the rail mechanism in the moving process of the vibration device, the loading process of the vibration device can effectively simulate the real train load, and the influence of the train loadon a roadbed is analyzed; guidance can be provided for engineering construction according to dynamic response result feedback of the roadbed, the train load can be well simulated, the difficulty is low, the simulation trueness is high, and the simulation is closer to the actual situation.

The invention discloses a spine straightening machine. The spine straightening machine comprises a base (1), a bed top (2), a swinging and vibrating integrated machine (3) and a controller (4), wherein the bed top (2) is positioned above the base (1), one end of the bed top (2) is hinged to the base (1), and the other end of the bed top (2) is in lifting connection with the base (1) through an electric mandril (7); the swinging and vibrating integrated machine (3) is mounted at one end of the upper surface of the bed top (2). The spine straightening machine is simple in structure and reasonable in design, and can treat spine diseases and spine relevant diseases caused by the not straight spine; under the inverted state of the human body, by utilizing the mechanical force, the spine straightening machine enables the spine to be subjected to passive fan-shaped spine rotating swing, then the intervertebral joint relationship can be straightened, the physiological curvature and straightness are reset, the intervertebral space is enlarged, the intervertebral hole is enlarged, the nerve root adhesion and compressing are eliminated, the neurological function is improved, the immunity is improved, the internal secretion is improved, the generation of nitric oxide is accelerated, hormone is balanced, the anti-aging effect is achieved, and the treatment effects are good.

The invention discloses a fast lead automatic production process and belongs to the technical field of fishing equipment. The fast lead automatic production process includes the following steps that firstly, a lead leather base is automatically fed; secondly, the surface of the lead leather base is roughened, specifically, a rotating disk rotates to a lead leather base roughening station, a lead leather base roughening device is used for performing roughening operation on the lead leather base on a material rolling device, so that the surface of the lead leather base is roughened, and the combining force between lead leather and the lead leather base is improved; thirdly, the lead leather is fed, rolled and cut, specifically, the rotating disk rotates to a lead leather feeding station anda material rolling station, and the lead leather is automatically wound, cut and pulled through cooperation of a lead leather feeding device and the material rolling device; fourthly, fast lead wherethe lead leather is wound is chamfered, specifically, the rotating disk rotates to a grinding station, and due to cooperation of a grinding device and the material rolling device, the upper and lowerends of the fast lead after the lead leather is wound are subjected to chamfering operation; and fifthly, automatic discharging is performed. The process is ingenious in design, connection between themechanisms is smooth, and compared with the process for making fast lead manually, the efficiency is improved by ten times or above.

The invention relates to a cervical vertebra tractor for operation. The device solves the problem of inconvenience in operation caused by pulling wrist in the current operation. The cervical vertebra tractor for operation comprises an operating bed, wherein the operating bed comprises a bedstead, a left bed plate and a right bed plate are arranged on the bedstead, the right end of the left bed plate is hinged and fixed with the bedstead, and the right bed plate is fixedly connected with the bedstead; and two arm clamping devices which are symmetrical with each other are arranged above the left bed plate, a pulling device is fixed to the right end of the bedstead, the pulling device comprises a horizontally-sliding pulling plate, a pulling rope is fixed to the right end of each arm clamping device, two groups of rope guiding devices are fixed to the upper end of the bedstead, and the pulling rope is fixedly connected with the pulling plate through the rope guiding device.

The invention provides a tow guide roller. The tow guide roller comprises a tow guide shell, an inner lining, two baffle rings, a shaft, two bearing packs, two choke plugs, two shaft sleeves, two adjusting screws and two locking screws, wherein the tow guide shell is a ceramic pipe or a porcelain enamel metal pipe; the wall thickness of the tow guide shell is between 2 and 8mm; two circles of channels can be reserved on the inner wall of the inner lining, so that the two baffle rings can be arranged in the channels; the inner lining is connected inside the tow guide shell; the two bearing packs are arranged at the two ends of the shaft respectively; the two choke plugs are arranged at the two ends of a bearing; the two shaft sleeves are sleeved on the outer sides of the two choke plugs and partially extend into the two ends of the tow guide shell respectively; the two adjusting screws are arranged on the two shaft sleeves; and the tow guide shell is in transition fit or interference fit with the inner lining, the inner lining is in transition fit or interference fit with a bearing outer shell, a bearing inner shell is in transition fit or interference fit with the shaft, and the tow guide shell is in clearance fit with the shaft sleeves. The tow guide shell has high wear resistance and heat resistance and long service life, flying of a tow can be reduced, and the quality of the tow can be guaranteed. The tow guide roller can be used for a production line of acetate fibers.

The invention discloses an automatic rescue system and method for an unmanned sweeper. The system comprises a scheduling management background and a plurality of sweepers; the sweeper can be used forsweeping, or the sweeper can be used as a trailer for rescuing other sweepers with low electric quantity or faults; the scheduling management background runs on a server; the dispatching management background is connected with the multiple sweepers through communication equipment, each sweeper comprises a main control module, and each main control module is connected with a GPS module, a communication module, an alignment detection module, a traction module, a navigation obstacle avoidance module, a driving module, a horizontal sensor, a visual sensor and a clamping module. Manual interventionis not needed, response is timely, efficiency is high, and unmanned rescue of the sweeper is achieved.

The invention provides a branching tensioner, which belongs to the technical field of electric transmission line stringing construction. The branching tensioner is used for spreading a plurality of guiding wires with the same conveying direction by adopting the guiding wire conveying direction as a front-back direction and adopting a horizontal direction perpendicular to the guiding wire conveyingdirection as a left-right direction, and comprises a base. A first group of tension pulleys, a second group of tension pulleys, a third group of tension pulleys, a fourth group of tension pulleys anda fifth group of tension pulleys are arranged on the base; each group of tension pulleys is used for spreading a single guiding wire, and is provided with two single pulleys front and back in parallel; each single pulley is provided with a single pulley shaft; each group of tension pulleys is provided with a connecting plate for connecting the two single pulley shafts, and is connected with a speed reducer; a front winding displacement guiding roller is arranged on the front end part of the base; a rear winding displacement guiding roller is arranged on the rear end part of the base; and eachguiding wire sequentially bypasses the front winding displacement guiding roller, the corresponding group of tension pulleys and the rear winding displacement guiding roller so as to be conveyed. According to the branching tensioner provided by the invention, five guiding wires can be spread at the same time, and the five groups of tension pulleys can be controlled independently, so that the construction efficiency is improved.

The invention discloses an intelligent massaging pillow. The intelligent massaging pillow is characterized by mainly consisting of a base (1), a neck body (2), a head body (3), a motor (9), a controller (6) and a pressure sensor (7) arranged on the head body (3). It can be ensured that the cervical vertebra of a user naturally stretches by combining the neck body and the head body of the intelligent massaging pillow, a massaging assembly arranged on the neck body can conduct frictional massage on the cervical vertebra of the human body under the driving of the motor so that the muscles and nerves of the cervical vertebra can be effectively relaxed, and a human body cervical vertebra traction effect of the neck body is improved. In addition, the controller and the pressure sensor of the intelligent massaging pillow are combined so that the motor driving the massaging assembly can be automatically started up and shut down, namely automatic control of the working states of the massaging assembly is achieved. Accordingly, the intelligent massaging pillow has a good cervical vertebra traction effect and very well achieves automatic startup and shutdown.

The invention discloses a child lower limb single hip herringbone fixing and skin traction device. The instrument comprises a lower limb fixing plate, and the lower limb fixing plate is worn on a child and tightly attached to the hip and the lower limb below the hip of the child; a foot fixing plate is arranged below the lower limb fixing plate, and pulley supporting rods are fixedly connected to the two sides of the bottom end of the lower limb fixing plate; the bottom end of the pulley supporting rod is rotationally connected with a pulley which is in sliding fit with a lower steel wire rope. One end of the lower steel wire rope extends upwards and is connected with the upper end of the foot fixing plate; the other end of the lower steel wire rope bypasses the pulley, extends upwards and is fixedly connected with the upper steel wire rope through a traction adjusting device; and a weighing device is arranged on the upper steel wire rope. According to the present invention, when one end of the lower steel wire rope is pulled upwards, the lower steel wire rope generates traction force for driving feet to move downwards through the pulley, so that the traction effect on the lower limbs of a child is achieved, and meanwhile the traction force can be accurately controlled through the weighing device.

The present invention relates to the technical field of bamboo mat production, in particular to an automatic sub-slice feeding and punching device for bamboo mat production. The device includes a fixing frame, wherein a first conveyor belt is arranged at the left end inside the fixing frame; the first conveyor belt is fixedly connected to the fixing frame; a second conveyor belt is arranged at theright end inside the fixing frame, and the second conveyor belt is fixedly connected to the fixing frame; a double-hole plate is fixedly connected to the center inside the bottom end surface of the fixing frame; a positioning device is arranged inside the fixing frame; a drilling device is arranged at the center of the top surface of the fixing frame; and the drilling device penetrates through the fixing frame. In the present invention, a first roller and a first gasket are arranged, a driving gear is in a meshing connection to a driven gear, the first roller and a rotation shaft are fixedlyconnected to the main shaft of a first motor, and the first roller is fixedly connected to the first gasket, so that a sub-slice can be quickly positioned when the facade of the bamboo mat sub-sliceis punched, and the punching efficiency of the sub-slice is improved.

The invention discloses a wiring device in the field of cable traction equipment. The wiring device comprises a fixing mechanism and a mounting plate. The mounting plate is provided with a limiting hole through which a cable passes and a fixation member for fixing the mounting plate on a pipeline. The fixing mechanism includes a fixation board and a clamping member for clamping a cable; the clamping member is fixedly connected to the fixation board; an air column bag is connected to the fixation board; one end, away from the fixation board, of the air column bag is fixedly connected with the mounting plate; and the air column bag is connected with a blower. Therefore, problems that the cable is easy to damage by the cable traction machine and traction of cables with different specifications can not be realized well in the prior art are solved.

The invention provides a traction reposition frame. The traction reposition frame comprises a support assembly (1) with the height adjustable and a swing frame assembly (2), wherein the support assembly (1) is provided with a leg pillow (101), the swing frame assembly (2) is connected with the leg pillow (101) in a pivot mode and provided with a sliable traction assembly (3), the support assembly (1) and the swing frame assembly (2) are locked or unlocked in an operable mode, and the traction assembly (3) and the swing frame assembly (2) are locked or unlocked in an operable mode. The traction reposition frame can adjust the angle between the axis of one thigh of a patient and the bed surface and the angle between the axis of one crus and the axis of the corresponding thigh to provide convenience for operations.

The invention relates to the technical field of traction devices, in particular to a tensioning device. The tensioning device comprises an operating handle assembly, a gear shaft, a fixed pulley housing, a main ratchet wheel, a friction plate, a limiting pawl, a drive gear, a driving sprocket and a movable pulley housing. The operating handle assembly drives the gear shaft to rotate; the gear shaft rotates and drives the main ratchet wheel to rotate and drives the driving sprocket through the drive gear; and a chain moves between the driving sprocket and a driven sprocket, thereby changing thedistance between the movable pulley housing and the fixed pulley housing. The friction plate is arranged on the lateral side of the main ratchet wheel, and under the pressing force of the operating handle assembly, the friction plate stops the main ratchet wheel, thereby reducing the load of the main ratchet wheel and prolonging the life of the main ratchet wheel. The tensioning device has the advantages that the operation of tension stringing is safe and reliable; the driving sprocket and the driven sprocket adopt the principle of fixed pulleys and movable pulleys and more effort is saved; the operating handle assembly drives the gear shaft and the operation is simple and convenient; and by adoption of the structure and transmission mode of the tensioning device, working at height is convenient to carry out.

The invention relates to an electronic bronchoscope and an auxiliary implantation manipulator thereof, and the electronic bronchoscope comprises an electronic bronchoscope body and a pulling mechanism which is movably installed on the electronic bronchoscope body and is used for pulling the electronic bronchoscope body. The pulling mechanism comprises a shell and a one-way transmission assembly arranged in the shell, so that the shell has a pulling effect on the electronic bronchoscope body only in the descending process; the electronic bronchoscope body penetrates through the shell and is tightly attached to the one-way transmission assembly, so that in the operation process, a doctor pulls the electronic bronchoscope downwards through a handle on the shell, the length of the electronic bronchoscope entering the body of a patient is long enough, and when the length needs to be increased, the handle is lifted upwards, the electronic bronchoscope does not move upwards under the action of the one-way transmission assembly, the structure is simple, and the practicability is high.

The invention discloses a steel wire preloading crimping device, and belongs to the technical field of medical instrument auxiliary devices. The steel wire preloading crimping device comprises a mounting plate and a plurality of preloading assemblies mounted on the mounting plate, each preloading assembly is used for preloading a steel wire and comprises a first loading air cylinder, a second loading air cylinder, a wire clamp structure and a first guide rail, the wire clamp structure is slidably connected to the first guide rail, the first guide rail is arranged on the mounting plate, and the wire clamp structure is used for clamping the steel wire; and a first telescopic rod of the first loading air cylinder is in sliding connection with the wire clamp structure, a limiting piece on the first telescopic rod is matched with the first telescopic rod to drive the wire clamp structure to slide in the preset direction and tension the steel wire, and a second telescopic rod of the second loading air cylinder is fixedly connected with the wire clamp structure and drives the wire clamp structure to slide along the first guide rail, wherein the first loading air cylinder is used for driving the wire clamp structure to calibrate the primary tension of the steel wire, and the second loading air cylinder is used for driving the wire clamp structure to calibrate the secondary tension of the steel wire.

The invention discloses a push-out limiting mechanism and a display screen module. The push-out limiting mechanism comprises a first mounting component and a second mounting component, wherein the first mounting component comprises a first mounting seat, an inserting piece and a first elastic piece, the inserting piece is arranged on the first mounting seat, and the first elastic piece is used forenabling the inserting piece to elastically run on the first mounting seat; the second mounting assembly comprises a second mounting seat, an inserting seat and a second elastic piece, wherein the inserting seat is arranged on the second mounting seat in a sliding mode, and the second elastic piece is used for being connected with the second mounting seat and the inserting seat; the inserting piece is perpendicular to the moving direction of the inserting seat; the inserting piece is provided with a first inserting part, and the inserting seat is provided with a second inserting part matchedwith the first inserting part. The push-out limiting mechanism has good buffering and traction effects; the push-out limiting mechanism is arranged in the display screen module, so that the safety ofdisassembly and assembly of the display screen body can be guaranteed, and the accidental falling of the display screen body in the disassembling and assembling process is avoided.