398 results about "Slider crank" patented technology

The invention discloses a low-vibration long-service-life rotary split type Stirling cryocooler, relates to the technical field of cryocoolers, and aims to solve the technical problems that reciprocating movement of a single compression piston has rotary inertia force, and a connecting rod in the single compression piston swings during movement, so that large vibration is generated. Comprising a compressor body and an expansion machine body which are arranged in a split mode. The motion states of the two compression pistons can be the same all the time through the symmetrical centering crank sliding block mechanisms which are completely equal in size and weight, then the momentum of the compressor is balanced, and finally reciprocating and rotating inertia force of the crank sliding block mechanisms is completely eliminated, and only extremely small vibration is generated. And a compressor is assisted to generate periodic pressure wave driving, and a gas spring is formed by using a dynamic seal, so that the discharger and the gas spring supported by the discharger form a forced vibration system, the formed damping force can generate a proper phase difference, and finally, an effective refrigeration effect is generated.

The invention relates to the technical field of furnace shell welding, in particular to a gas industrial furnace shell welding device which integrates a radial circular seam and an axial longitudinal seam, a servo motor drives a planetary gear train through an intermittent sheave, a rotating shell drives a clamped furnace shell to rotate, and radial welding is completed; after a bottom clamping jaw instantly locks a shell, power is switched to a planet carrier, an outer mounting arm drives a driven scraping arm to grind the inner wall while axially moving, welding and grinding synchronization is achieved, a bidirectional pushing seat crank sliding block mechanism continuously rotates in a one-way mode to push and pull the furnace shell in a two-way mode, whole-circle accurate grinding is achieved during resetting, and six sets of air cylinder lead screw adjustable clamping jaws conduct internal and external synchronous supporting. The outer supporting cylinder is prevented from deformation, secondary clamping is not needed in the whole process, butt joint of multiple sections of furnace shells is completed at a time, continuous filling of a longitudinal weld bead can be completed when a circular seam is still in a high-temperature plastic stage through instantaneous switching of clamping and stopping, and the welding quality of a T-shaped connector area is improved.

The invention discloses a four-flapping-wing aircraft and an attitude control system thereof, and relates to the technical field of micro aircrafts, and the four-flapping-wing aircraft comprises a fixed rack, a guide rod, a slide block mechanism, a pitching frame, a rolling frame, a pulley and a chord driving system. The fixed rack is provided with four cantilevers, a sliding block mechanism is installed on a guide rod, and the pitching frame and the rolling frame control pitching and rolling actions through steering engines respectively. The four pulleys are connected to the pitching frame, and each pulley is hinged to one wing. The string driving system comprises a guide wheel, a string and a crank, one end of the string is connected with the slider mechanism, and the other end bypasses the guide wheel and is connected with the pulley to realize wing flapping. Through the deflectable spars and fine steering engine control, efficient aerodynamic performance, enhanced thrust output and excellent flight flexibility and adaptability are achieved, meanwhile, due to the design of the crank sliding blocks, structural stress is relieved, the service life is prolonged, the aircraft adapts to multiple flight modes, and the environment adaptability and task execution efficiency of the aircraft are improved.

The utility model discloses a flexible surgical instrument and an instrument driving device thereof, a motor barrel of the instrument driving device is provided with a clamping hook assembly, and the clamping hook assembly comprises a first motor, a linkage disc, two clamping pins and two connecting rods, the bayonet lock is configured to be capable of moving between a clamping state and a clamping releasing state relative to the first clamping groove on the side of the flexible instrument device; the output end of the first motor is in transmission connection with the linkage disc so as to drive the linkage disc to rotate; one ends of the two connecting rods are rotationally connected with the linkage disc, and the other ends of the two connecting rods are rotationally connected with the two clamping pins respectively; and the central positions of the two connecting rods, which are rotationally connected with the linkage disc, are symmetrically arranged relative to the rotating center of the linkage disc. Under the driving of the first motor, the two clamping pins are synchronously driven to move based on the crank sliding block mechanism, and clamping connection of the clamping pins is achieved. And when the flexible instrument device needs to be disassembled, the first motor can drive the bayonet lock to rotate to a clamping releasing state, and good operability is achieved.

The invention relates to a compensation mechanism for a displacement machine according to the spiral principle, in particular a scroll compressor, wherein the compensation mechanism comprises a driveshaft with a central axis S and a compensation device, which comprises a cylindrical hub element that is mounted on a first eccentric pin of the driveshaft such that it can rotate about an axis of rotation P, and a compensation element which is mounted on the hub element such that it can rotate about an axis of rotation J and which has an eccentrically arranged slotted hole extending in the radial direction relative to the axis of rotation J, wherein a second eccentric pin of the driveshaft is guided in the slotted hole of the compensation element such that a Scotch yoke is formed between the slotted hole and the axis of rotation J of the compensation element. The invention also relates to a displacement machine comprising a compensation mechanism of this type.

The invention discloses a lower limb leg-foot structure with jumping ability and a biped robot. The lower limb leg-foot structure comprises a thigh assembly, a shank assembly and a foot assembly which are sequentially connected from top to bottom. A thigh body, a knee joint rocker arm and a shank pull rod of the thigh assembly and a shank body of the shank assembly form a four-bar mechanism. The thigh body, the knee joint driving motor and the knee joint rocker arm form a slider-crank mechanism. The four-connecting-rod mechanism and the slider-crank mechanism form a set of combined mechanism through the common knee joint rocker arm so as to drive the knee joint to rotate. According to the combined mechanism, the linear motion speed of the knee joint driving motor is amplified into the rotation angular speed of the knee joint through the variable reduction ratio amplification effect of the four connecting rods, and the lower limb of the knee joint driving motor has the explosive jumping ability under the condition of the conventional output speed.

The invention relates to a gravel aggregate grading vibrating screen which comprises a machine body, a damping base arranged at the bottom of the machine body, a feeding hopper arranged at the top of the machine body, a screen mesh arranged in the machine body, a first speed reducing plate arranged at the bottom of the feeding hopper, a reciprocating material distributing system arranged below the first speed reducing plate and located above the screen mesh, and a vibrating motor installed on the side face of the machine body. The reciprocating material distribution system comprises a guide plate, a movable groove and a hole groove are formed in the guide plate, a first rotating shaft penetrates through the hole groove, transverse grooves are symmetrically formed in the two side walls of the machine body, the two ends of the first rotating shaft are slidably connected with the machine body in the transverse grooves, a second rotating shaft penetrates through the movable groove and is fixedly connected with the side wall of the machine body, and the first rotating shaft and the second rotating shaft are arranged in parallel. The end of the first rotating shaft is connected with a crank sliding block mechanism. The gravel is decelerated through the first speed reducing plate and then evenly dispersed on the screen through the reciprocating material distributing system, the situation that the gravel excessively abrades the same position of the screen is avoided, the service life of the screen is prolonged, and the screening efficiency is also improved.

The invention discloses a single-power linkage type soil drilling and fertilizing structure and a tumbril, and relates to the field of agricultural machinery, and the soil drilling and fertilizing structure comprises a second crank sliding block mechanism for driving a fertilizing leg to lift periodically and a first crank sliding block mechanism for driving a dredging guide rod arranged in the fertilizing leg in a sliding manner to lift periodically, the two crank-slider mechanisms are driven by the same power source and have a stroke difference, the stroke difference enables the dredging guide rod to descend or ascend before the fertilization leg, and it is guaranteed that the dredging guide rod protrudes out of the bottom of the fertilization leg in a stroke in the process that the fertilization leg descends and drills into soil, so that a bottom opening of the fertilization channel is blocked, and the fertilization effect is improved. And in the residual descending stroke of the fertilizing leg, the dredging guide rod retracts into the fertilizing leg due to ascending, and the bottom opening of the fertilizing channel is opened. According to the invention, fertilization can be carried out after automatic soil drilling, the problem that the fertilization channel is blocked by soil during soil drilling can be avoided, and the fertilizer applicator is suitable for fertilization operation of most crops, especially hole sowing crops.

The invention discloses a parameterized design method for a flapping wing device, which belongs to the field of aerospace and comprises the following steps: determining the flapping amplitude of a designed flapping wing mechanism; according to the relation between all rods and angles in the crank sliding block mechanism, the transition mechanism and the swing guide rod mechanism, the relation between the angular speed # imgabs 1 # of a crank # imgabs 0 # rotating around the circle center in the crank sliding block mechanism and the angular speed # imgabs 3 # of a first guide rod # imgabs 2 # in the swing guide rod mechanism is determined; the rod length of each mechanism is obtained through the upper limit position, the middle position and the lower limit position of the mechanism. According to the parameterization design method for the flapping wing device, the flapping wing mechanism is obtained through rule derivation between geometric dimensions and kinematics, large flapping amplitude can be achieved, and thoughts are provided for design of the flapping wing mechanism.

The utility model discloses an electronic mechanical actuator of a braking system and an automobile, the electronic mechanical actuator comprises a crank sliding block assembly, and the crank sliding block assembly comprises a crank, a connecting rod, a sliding block and at least one reset piece. During use, the driving assembly drives the crank to rotate so that the crank can be sequentially linked with the connecting rod and the sliding block to drive the brake pad to slide in the direction close to the brake disc to achieve braking, after braking is completed, the sliding block can return to the initial position through the restoring force of at least one reset piece, and at the moment, the driving component does not need to work to apply the restoring force to the crank-sliding block assembly; damage caused by frequent working and heating of the driving part can be avoided. The restoring force of the reset piece can be rapidly linked with the brake pad to reset through the crank sliding block assembly, the electronic mechanical actuator has the advantages of being simple in structure, small in occupied space, small in motor heating and rapid in response, and the braking performance of an automobile can be improved by arranging the electronic mechanical actuator of the structure on the automobile.

The invention provides multiple detection equipment for a deep groove ball bearing, and relates to the technical field of bearing detection, the multiple detection equipment comprises a main shaft and a vertical support frame, the vertical support frame is composed of a U-shaped vertical support frame and a grounding bottom plate welded at the bottom end of the U-shaped vertical support frame; two vertical guide rods are symmetrically welded in the U-shaped vertical supporting frame, two semicircular mounting sleeves and two cross-shaped transmission frames are symmetrically mounted on the two vertical guide rods in a sliding mode, and the cross-shaped transmission frames are arranged on the upper sides and the lower sides of the two semicircular mounting sleeves respectively; two transverse threaded shafts are symmetrically installed on the two vertical guide rods and two vertical supporting plates of the U-shaped vertical supporting frame in a penetrating and rotating mode, and the two transverse threaded shafts are symmetrically sleeved with two threaded rings in a threaded screwing mode. The double-crank-slider mechanism is a stripping and dismounting mechanism which is integrated on the detection equipment and is used for directly dismounting the deep groove ball bearing, and compared with the prior art lacking a stripping and dismounting mechanism, the stripping and dismounting convenience of the deep groove ball bearing can be improved through the arrangement of the double-crank-slider mechanism.

The invention discloses a pneumatic air valve and device, relates to the technical field of air pipe turn-off devices, and solves the problems that in the prior art, an automatic air valve in an exhaust pipe of LDS equipment is complex in structure, high in cost, prone to being stuck and poor in sealing performance. According to the method, a shell, a valve plate rotationally installed in the shell, a flexible sealing ring embedded in the outer wall of the valve plate, a sealing assembly used for improving the sealing performance and a driving mechanism used for driving the valve plate to rotate stably are included, the pneumatic air valve is based on a crank sliding block mechanism, and driving of opening and closing of the valve plate is achieved through a simple structure of an air cylinder and a connecting rod; the structure is simple, the production cost is low, when the valve plate is in a closed or opened state, the included angle between the second connecting rod and the third connecting rod and the included angle between the third connecting rod and the piston rod of the air cylinder cannot be 0 degree or 180 degrees, and therefore the jamming phenomenon cannot occur; the valve plate can be tightly attached to the first sealing plate and the second sealing plate on the two sides when closed, and the sealing performance of the valve plate after closing is guaranteed.

The invention relates to the technical field of bionic flapping wings, and particularly discloses a double-motor bionic butterfly flapping wing device which comprises a rack and flapping wing mechanisms symmetrically arranged on the two sides of the rack. The flapping wing mechanism comprises a driving motor, a self-eccentric crank sliding block assembly and a flapping wing; the driving motor is fixed to the end of the rack, the lower end of the flapping wing is hinged to the lower end of the rack, one end of the self-eccentric slider-crank assembly is connected with the power output end of the driving motor, and the other end of the self-eccentric slider-crank assembly is slidably connected with the flapping wing and pushes the flapping wing to rotate. A dual-motor driving structure based on a self-eccentric quick-return mechanism is adopted, and the eccentric sliding block and the sliding groove are introduced for guiding, so that asymmetric rhythm control of'fast upward and slow downward 'is realized, an asymmetric flapping mode in butterfly flight is more truly restored, and the bionic authenticity and the motion coordination of the mechanism are remarkably enhanced.

An apparatus and a polishing system for rotational magnetorheological abrasive flow nano-finishing are described. The apparatus includes an upper cylinder with coupled upper piston and a lower cylinder with coupled lower piston. A first motor drives synchronized reciprocating motion of both pistons via respective slider crank mechanisms. A magnet fixture positioned between the cylinders includes permanent magnets arranged in a ring configuration with a central hole for workpiece placement. A second motor rotates the magnet fixture to manipulate magnetic field orientation. The cylinders, pistons and magnet fixture define a space for containing magnetorheological (MR) fluid including ferromagnetic particles, abrasive particles and carrier fluid. The configuration enables controlled fluid flow through the hole while maintaining direct workpiece contact, with ferromagnetic particles exhibiting both rotational and reciprocal movement patterns. This dual-motion finishing approach enables material removal through magnetic field-controlled abrasive action, achieving nano-scale surface quality on complex geometries.

A rotating shaft mechanism includes a body, a first door plate, a second door plate, an intermediate door plate, a first connecting rod assembly, and a second connecting rod assembly. The first connecting rod assembly includes a first housing connecting rod, a first gear connecting rod, and a first secondary connecting rod. The rotating shaft mechanism further includes a first meshing transmission structure. The first housing connecting rod, the first gear connecting rod, the first secondary connecting rod, the first door plate, and the body form a crank-slider structure to drive the first door plate to rotate relative to the body. The first gear connecting rod drives the intermediate door plate to move relative to the body using the first meshing transmission structure.

The invention discloses an intelligent visual deicing robot for a high-voltage power transmission line, which comprises a machine body frame, a walking mechanism, a deicing mechanism, a visual module and an unmanned aerial vehicle connecting mechanism, and is characterized in that the walking mechanism, the deicing mechanism and the visual module are all mounted in the machine body frame; the deicing mechanism comprises a deicing fan, a drill bit, a drill bit shell, a crank sliding block mechanism and a double-output-shaft motor, the deicing fan is installed at the front end of the machine body frame, the drill bit and the drill bit shell are vertically installed in the machine body frame, and the crank sliding block mechanism is installed at the front end of the drill bit shell and connected with a piston located in the drill bit shell; the double-output-shaft motor drives the deicing fan and the crank sliding block mechanism to rotate at the same time, and rotary deicing of the deicing fan and vibration deicing of the drill bit are conducted at the same time. The deicing device is compact in structure, high in automation degree, small in shaking degree, high in stability, easy to operate and convenient to install, and deicing operation on the high-voltage wire can be achieved.

The invention relates to a sewing machine and a cloth pricking stroke adjusting device thereof. The cloth pricking stroke adjusting device comprises a driving mechanism, and an output shaft of the driving mechanism rotates to drive a presser foot lifting cam and an adjusting crank to rotate to a working position; the working positions comprise at least one adjusting position of the presser foot lifting cam and at least one adjusting position of the adjusting crank; the adjusting position of the presser foot lifting cam corresponds to the upper limit position and the lower limit position of the foot lifting module; the adjusting crank is hinged to the adjusting connecting rod, the adjusting position of the adjusting crank corresponds to the target angle of the adjusting crank, and the driving mechanism drives the adjusting crank to swing to the target angle, so that the position of the fixed end of the adjusting connecting rod changes along with the target angle of the adjusting crank. By adjusting the position target of the fixed end of the connecting rod, the target cloth puncturing stroke is correspondingly adjusted, the cloth puncturing stroke adjusting device is applied to the sewing machine, and the sewing machine with the cloth puncturing stroke adjusting function is obtained.

The utility model relates to a pelletizing device for particle extrusion type 3D printing. The device comprises a bottom plate, a supporting column, a driving sliding block, a connecting block, a horizontal guide rail, a lead screw, a nut seat, an upper flat plate, a bolt, a material pushing plate, a material pressing plate, a motor fixing frame, a brushless motor, a front flat plate, a crank wheel, a driving shaft, a connecting rod, a vertical guide rail, an execution sliding block, a cutter connecting block, a cutter, a guide pipe fixing frame, a guide pipe fixing cover, a safety hood, a wire, a guide fixing ring and a storage box. The device comprises a lead screw coupler, a propulsion motor, a lead screw supporting seat fixing end, a motor bracket, a lead screw supporting seat supporting end, a driving coupler and a guide pipe. A crank sliding block mechanism and a ball screw sleeve are applied, a wire is driven through the ball screw sleeve, and meanwhile, a cutter is driven by reciprocating rotation of the crank sliding block mechanism to stably cut the wire, so that the purpose of uniform pelletizing is achieved; and meanwhile, the multi-material composite wires of different specifications can be matched by changing the guide pipes of different sizes, so that more use requirements are met.

The embodiment of the invention provides a cam curve construction and synchronous cutting control method, device and system. The construction method comprises the following steps: acquiring motion position information of a to-be-cut material; obtaining a kinematic model of the slider-crank mechanism; on the basis of the motion position information of the material and a kinematic model of a crank sliding block mechanism, a cam curve representing the corresponding relation between the motion position of the material and the rotation angle of the crank is generated, and the cam curve comprises a synchronous cutting interval; the cam curve is a line segment within the synchronous cutting interval that makes the material to be cut have a substantially constant speed. According to the embodiment of the invention, high-speed and stable cutting operation can be realized, the high consistency of the cutting process is ensured, and the cutting quality and efficiency are remarkably improved.

This invention relates to a continuous-body soft tissue insertion actuator and surgical robot system based on flexible transmission, belonging to the field of medical device technology. The insertion actuator includes a base with a first through hole at its center; an insertion plate rotatably connected to the base; a drive rod passing through the first through hole and slidably connected to the base, one end of which is connected to a drive unit; a pull rod connected to the drive rod; and a transmission link, both ends of which are rotatably connected to the insertion plate and the pull rod, respectively. The drive unit drives the drive rod to move. When the pull rod moves away from the base, it drives the transmission link, causing the insertion plate to close inward, forming a conical structure. When the drive rod moves the pull rod closer to the base, the insertion plate opens under the push of the transmission link. This actuator utilizes a hyperelastic rod to transmit push and pull forces within a curved channel, combined with an offset crank-slider mechanism, to achieve powerful soft tissue insertion and separation.

A kind of small water surface jumping robot based on crank slider mechanism imitating locust, it relates to a kind of small water surface jumping robot based on crank slider mechanism imitating locust.The present application is to solve the problems that the existing water surface jumping robot is small in size, energy storage is not enough, and cannot well utilize the resistance of water, and is difficult to realize functional application.The present application includes driving system, transmission system, two spherical foam legs, energy storage system, main body support system and rectangular foam leg;Two spherical foam legs are arranged side by side at the front end of the main body support system, the rectangular foam leg is installed at the rear end of the main body support system, the driving system is installed at the lower part of the main body support system, the transmission system is installed in the main body support system, and the energy storage system is installed at the top of the main body support system;Driving system is connected with energy storage system, and energy storage system is connected with transmission system.The present application belongs to the technical field of bionic robot.

The present invention discloses a mechanical chuck device comprising a carrier plate, a water-cooled base, a chuck claw supported on the water-cooled base, a water-cooled base, a crank-slider mechanism, a heating coil connector, and a temperature sensor. The water-cooled base has a cooling channel within it. When the carrier plate is at a high temperature, a cooling medium is passed through the cooling channel to cool components outside the carrier plate. The present invention has the advantages of a simple and compact structure, simple manufacture, ease of use, and a wide range of applications.

The utility model belongs to the technical field of detection equipment, and discloses an automatic detection device for an electrode plate, which comprises a frame body, and a detection module, an overturning module and a material taking module which are arranged on the frame body, and the material taking module is used for grabbing a first surface of the electrode plate; the overturning module comprises a slider-crank mechanism, a first chain transmission mechanism, a first fixing frame and a second fixing frame, wherein the first fixing frame and the second fixing frame are fixed to each other. The material taking module is rotationally connected to the second fixing frame. The crank sliding block mechanism comprises a crank and a sliding block, the sliding block is slidably connected to the first fixing frame, and the crank is rotatably connected to the first fixing frame; the first chain transmission mechanism comprises a first driving wheel, a first driven wheel and a first chain wound around the first driving wheel and the first driven wheel, the crank is rotationally connected with the first fixing frame, the first driving wheel is fixed to a rotating shaft of the crank, and the first driven wheel is fixed to the material taking module; the crank rotates to drive the material taking module to turn over through the first chain transmission mechanism, so that the second surface of the electrode plate faces the detection module for detection, and the structure and detection steps are simplified.

The utility model provides a transmission structure of a needling glue taking device, the needling glue taking device comprises a guide rail frame, and the transmission structure comprises a first transmission part, a second transmission part and a third transmission part, one end of the second transmission part is in transmission connection with the first transmission part; the other end of the second transmission part is in transmission connection with the third transmission part; the second transmission part and the third transmission part form a crank sliding block structure so as to drive the third transmission part to conduct movable drilling. And through an accurate transmission structure, the overall production efficiency is improved. Due to the precisely controlled lifting motion, damage to rubber trees is reduced, protection of the trees is facilitated, and the long-term yield of rubber is increased. Due to the adoption of a simplified transmission structure and a stable mechanical design, the failure rate of equipment is reduced, so that the maintenance and repair cost is reduced.

The utility model provides a hose sealing machine servo filling and jacking mechanism which comprises a jacking device and a filling device, the jacking device comprises a jacking power rod, a crank connecting rod mechanism and a jacking power device, the jacking power device drives a jacking sliding block mechanism to drive the jacking power rod to do reciprocating motion, and power is provided for upward jacking of a hose; and the filling device comprises a filling power rod, a slider-crank mechanism and a filling power device, and the filling power device drives the slider-crank mechanism to drive the filling power rod to do reciprocating motion so as to provide power for filling materials into the hose. The servo motor is used for driving the crank sliding block and the crank connecting rod mechanism, and the stroke of the sliding block and the stroke of the connecting rod can be adjusted through the servo motor, so that the stroke of the power rod of the filling mechanism and the stroke of the power rod of the jacking mechanism are adjusted, adjustment switching operation can be conveniently carried out on hoses with different lengths and pipe diameters, the whole mechanism does not need to be disassembled and assembled, and the adjusting process is convenient and fast.

A packaging carton inner tongue folding mechanism comprises an installation base plate and is characterized in that a sliding plate is installed on the installation base plate in a sliding mode through two transverse sliding rail assemblies, a servo motor is arranged on the bottom face of the installation base plate in the vertical direction, and the output end of the upper end of the servo motor is connected with the sliding plate through a crank sliding block mechanism; two connecting plates are installed on the sliding plate in a sliding mode through two longitudinal sliding rail assemblies, driving air cylinders are arranged at the positions, close to the two ends, of the sliding plate respectively, and one ends of piston rods of the driving air cylinders are connected with the corresponding connecting plates respectively. F-shaped pushing handles are uniformly distributed and fixed on the two connecting plates respectively, one ends of the F-shaped pushing handles extend to the same sides of the two connecting plates respectively, every two adjacent F-shaped pushing handles are symmetrically arranged, and the other ends of the F-shaped pushing handles are fixed on the two connecting plates respectively. The automatic folding device has the beneficial effects that inner tongues of a plurality of packaging paper boxes can be automatically folded at the same time, the working efficiency is high, the action is stable, the labor cost can be reduced, and the packaging paper boxes can be prevented from being stained.

The invention relates to a large-displacement handheld electric greasing gun and a lubricating pump. The technical problems that a traditional handheld greasing gun is slow in lubricating grease filling and low in lubricating efficiency are solved. Comprising a battery, a grease storage barrel, a driving module, a grease pumping module and a converging block, the driving module comprises a gear motor and a transmission mechanism, the transmission mechanism comprises a worm and gear mechanism and at least two sets of slider-crank mechanisms, each slider-crank mechanism comprises a rotating pair, a connecting rod and a slider, and the rotating pair comprises a rotating crankshaft vertically arranged on the side face of a worm gear; one end of the connecting rod is rotationally assembled on the rotating crankshaft through a sleeve, and the other end is hinged with the slider; the grease pumping module comprises plunger pairs arranged in one-to-one correspondence with the slider-crank mechanisms, each plunger pair comprises a valve body, a plunger valve element and a one-way valve, the one-way valves are arranged at the outlet end of a valve cavity, the sliding blocks are fixedly connected with the plunger valve elements, and the converging block is provided with a main oil duct communicated with the grease injection gun head and branch oil ducts connected with the one-way valves in a one-to-one correspondence mode. And each branch oil duct is communicated with the main oil duct.

This invention relates to the field of marine propulsion device manufacturing, specifically a design method for a fully azimuth-controlled adjustable-pitch ducted propeller. This method extracts the basic parameters of the ship's main engine and existing rudder propeller, and establishes an integrated arrangement scheme to replace the fixed-pitch propeller with an adjustable-pitch propeller while maintaining the original power parameters unchanged. Based on the theoretical diagram of the fixed-pitch ducted propeller, a hydrodynamic calculation program is executed, introducing correction factors for increased shell diameter ratio and slightly reduced disk area ratio, and forcibly lowering the theoretical thrust coefficient by 5%, to obtain the corrected target open-water characteristic curve. The overall rotational characteristics of the fully azimuth-controlled rudder propeller are utilized to provide thrust for reversing and steering, strictly limiting the pitch adjustment authority to adaptability requirements for low-speed navigation and providing maximum drag under multiple operating conditions. A single-crank slider mechanism is configured inside the propeller hub as the core rotor component, and a three-dimensional spatial layout is completed. An electro-hydraulic integrated servo control system, dominated by a PLC and incorporating a dual-pump parallel architecture and a built-in hydraulic lock, is established. This significantly reduces the frequency and physical amplitude of the propeller blade rotation angle.

A seeding device and driving chassis of an intelligent seeding trolley comprises a trolley body, a front soil loosening module, a seeding device, an irrigation and fertilization module, a tail end soil covering module and a locomotive driving module, the seeding device comprises a hole digging mechanism and a seeding mechanism, and the seeding mechanism comprises a seeding disc, a seeding disc motor and a seeding pipeline. The seeding disc motor is arranged at the bottom of the seeding disc; the seeding pipelines are distributed at the bottom of the seeding disc; the hole digging mechanism comprises an infrared range finder, a drill bit motor and a slider-crank mechanism; the locomotive driving module comprises a system control unit, an energy unit and a movable chassis, and the movable chassis adopts a composite track design. Due to the design of a slider-crank mechanism of the hole digging mechanism, the energy loss in the hole digging process is reduced, hole digging and seeding work of a plurality of pits and a plurality of seeds is realized, and the seeding efficiency is improved; by adopting the movable chassis with the combined type crawler belt design, the intelligent seeding trolley climbs over obstacles, and seeding work on a terraced field is achieved.

The utility model relates to a steel wire rope fatigue testing machine which comprises a machine frame, a wire fixing base is vertically connected to the machine frame in a sliding mode, two opposite wire clamping bases are arranged on the wire fixing base, a plurality of wire fixing blocks are arranged on the opposite sides of the two wire clamping bases in a protruding mode at intervals, and the wire fixing blocks on the two wire clamping bases are arranged in a staggered mode to clamp and fix a steel wire rope. Wherein the back side of one wire clamping seat is in sliding connection with a fixing block through a guide rod, a bolt is connected to the fixing seat in a threaded mode, the end of the bolt abuts against the wire clamping seat, the bottom of the wire clamping seat is driven by a slider-crank mechanism to slide on the machine frame in a reciprocating mode, the other end of the steel wire rope is sequentially wound around a plurality of wire spools, and a balancing weight is connected to the end of the steel wire rope in a hanging mode. The steel wire rope fatigue testing machine is simple in structure, convenient and stable.