5033 results about "Crank" patented technology

The invention relates to the technical field of bionics, in particular to a bionic crawling device which comprises a support, a driving unit and at least one pair of crawling mechanisms, and each pair of crawling mechanisms comprises two space crank structures; a phase difference exists between actions of the two space crank structures, and the tail ends of the outer sides of the two space crank structures are located at low positions in turn to bear the support; the space crank structure comprises an inner crank, a first fulcrum and an outer crank which are sequentially connected, the driving unit is used for driving the inner crank to do conical motion, the first fulcrum is rotationally connected to the support, the inner crank is arranged in the support in a translational motion mode, and the outer crank is arranged outside the support in a translational motion mode. Each pair of crawling mechanisms can be driven to act through one driving unit, the number of driving sources is small, the production and manufacturing cost is low, the space crank structure is good in working stability and small in occupied space, use of connecting rods and exposure of unnecessary parts are reduced, the bionic crawling device can be made more refined, and the service life of the bionic crawling device is prolonged. During crawling, the fluctuation range is small, and the crawling stability is good.

A powered ratchet tool includes a housing and a motor disposed within the housing. The motor has an output shaft rotatable about a first axis. The powered ratchet tool further includes a ratchet mechanism supported by the housing and operably coupled to the output shaft to be driven by the motor. The ratchet mechanism has a crankshaft assembly defining a variable crank radius configured to change an extent of each rotational stroke of the ratchet mechanism. Moreover, the powered ratchet tool includes an output drive operably coupled to the ratchet mechanism to be rotated about a second axis perpendicular to the first axis.

The crawler-type mobile welding robot comprises a main body mechanism, a control mechanism, a welding mechanism and a welding detection mechanism, the main body mechanism comprises a chassis, crawler wheels are symmetrically installed on the two sides of the bottom of the chassis, a control cabinet is fixedly installed on the top of the chassis, and a welding mechanical arm is installed on the chassis; a crank is mounted at the tail end of the welding mechanical arm through a shaft; the control mechanism is mounted in the control cabinet; crawler wheels of the main body mechanism are adapted to complex terrains, the welding mechanism is used for executing a core welding task, and a welding mechanical arm is used for flexibly adjusting poses to be matched with a welding system in an industrial personal computer to achieve automatic welding actions; the ultrasonic detection probe is stably attached to the workpiece under the action of the first spring, an operator does not need to manually smear a coupling agent, and the ultrasonic flaw detection equipment does not need to be manually controlled for welding detection.

The invention discloses an ornithopter with foldable wings, and belongs to the technical field of ornithopters. The device comprises a driving assembly which is symmetrically connected with a swing mechanism, the swing mechanism is connected with a flapping transmission rod, the flapping transmission rod is provided with a second inner wing connecting piece, one end of the first inner wing connecting piece is connected with the first inner wing connecting piece, and the other end of the first inner wing connecting piece is connected with the second inner wing connecting piece; the direction control assembly is connected with an output crank, and the output crank is connected with one end of an inner wing connecting piece connected to the second inner wing connecting piece. The outer wing connecting piece is connected with the outer end part of the inner wing connecting piece; the front-end main frame is connected with the rear-end main frame connecting rod; the power module is used for supplying power to the aircraft; according to the invention, the extension degrees of the wings are respectively and accurately controlled, and the flight attitude is adjusted, so that the flight is more stable, and excellent bionic performance is shown.

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention relates to the technical field of valves, in particular to a buffering device for a valve, which comprises a valve body, a valve core and a valve seat are arranged in the valve body, a support is detachably arranged in the valve seat, a rotating frame is rotatably arranged on the support, more than two self-adaptive rotating shafts are arranged on the rotating frame along the circumferential direction, and the self-adaptive rotating shafts are arranged along the radial direction of the rotating frame. The two ends of the self-adaptive rotating shaft are connected with the buffer blade and the swing crank respectively, the rotating frame is detachably provided with a variable-pitch damper, the variable-pitch damper is connected with the self-adaptive variable-pitch disc, the self-adaptive variable-pitch disc is provided with a limiting rail, the swing crank is in sliding connection with the limiting rail, and the spiral angle of the buffer blade is in positive correlation with the elastic force of the variable-pitch damper. According to the buffering device for the valve, by designing the buffering device capable of adaptively changing the buffering resistance and used for the valve, the problem that a valve element is prone to being damaged during valve switching is solved, and the defect that the performance of the valve is reduced due to the adverse effect of a traditional buffering structure on the flow speed and uniformity of fluid is overcome.

The utility model discloses a punching machine for power distribution cabinet production, which comprises a workbench, one side of the workbench is provided with a lubricating mechanism, the lubricating mechanism comprises a material box, the bottom of the left side of the material box is provided with a fixing pipe, one side of the fixing pipe is communicated with a frame body, one side of the frame body is movably connected with a crank shaft, and the crank shaft is movably connected with the workbench. The right side of the bottom of the workbench is fixedly connected with a double-shaft motor. According to the punching machine for production of the power distribution cabinet, the lubricating mechanism is arranged, an electric telescopic rod drives an adjusting plate to move, the adjusting plate drives a spray head to move, so that the spray head moves to the position between an upper die and a lower die, a double-shaft motor drives a crankshaft to rotate, the crankshaft drives an adjusting rod to move, the adjusting rod drives a fixing rod to move, and the fixing rod drives a sealing plate to move; when the sealing plate moves towards the inner side, the lubricating liquid can be pumped out through a fixing pipe, and when the sealing plate moves towards the outer side, the lubricating liquid can be discharged into a discharging pipe and then sprayed out through a spray head, so that the lubricating liquid makes contact with the upper mold and the lower mold.

The invention belongs to the technical field of anti-freezing solution production, and particularly relates to an automatic anti-freezing solution blending device for a hydraulic support, the automatic anti-freezing solution blending device comprises an axial position ring, a main body unit is arranged in the outer side space of the axial position ring, a regulation and control unit is arranged on the outer wall of the axial position ring, and a feedback unit is arranged on one side of the regulation and control unit; according to the invention, the change state of the interaction force between the external paddle and the flowing anti-freezing solution is fed back to the axial position ring in real time through the crank, and the deviation state between the frame type stirring paddle and the axis of the kettle body is changed in real time when the radial component force between the paddle and the anti-freezing solution is gradually increased; the method is beneficial to the non-homogenization of gaps (small near-wall side gaps and large far-wall side gaps) between the frame type stirring paddle and the inner wall of the kettle body, promotes the generation of stronger shearing force in a small-gap region, inhibits the circumferential symmetric flowing state of an anti-freezing solution in a boundary layer, and promotes the backflow of the anti-freezing solution in a large-gap region, thereby promoting the axial mixing of the anti-freezing solution and improving the stability of the anti-freezing solution. An anti-freezing liquid layer is effectively dispersed, and the swirling tendency is reduced.

The embodiment of the invention provides a three-degree-of-freedom waist structure and a humanoid robot, and relates to the technical field of humanoid robots. The three-degree-of-freedom waist structure of the humanoid robot comprises a first joint mounting piece and a second joint mounting piece. And a waist turnover joint is arranged in the first joint mounting piece. The output end of the waist turnover joint is connected with the robot lower limb structure. And the second joint mounting piece is rotationally connected with the first joint mounting piece. And a waist side-sway joint and a waist pitching joint are arranged in the second joint mounting piece. The waist side-sway joint and the waist pitching joint are sequentially arranged in the direction of the output shaft of the waist pitching joint. And the output end of the waist side sway joint is connected with the first joint mounting piece through a crank connecting rod mechanism. The output end of the waist pitching joint is connected with the robot chest structure. A full series connection mode can be adopted, the whole structure is compact, the structure is prevented from being bloated, good structural rigidity is achieved, kinematics calculation and control of the series connection structure are simple, and the motion control difficulty is reduced.

The invention discloses a cushion block for realizing differential pushing of a curved bridge of a common walking jack, which comprises a first cushion block and a second cushion block, the first cushion block and the second cushion block are respectively arranged on the walking jack on the inner side and the outer side of the bottom surface of a main beam of the curved bridge, and the first cushion block comprises a first bearing plate; the first bearing plate is placed in the sliding block and can rotate freely. The sliding block is placed in the base, can horizontally move in any direction in the horizontal plane and can automatically reset, the position of the sliding block is adjusted through the crank, and the differential distance in the differential pushing process is achieved. The second cushion block comprises a second bearing plate and a sleeve, the second bearing plate is placed in the sleeve, the structure of the second bearing plate is the same as that of the first bearing plate, and the second bearing plate can rotate freely. The bent bridge differential pushing device can adapt to beam body rotation, transverse displacement and longitudinal differential displacement in the differential pushing process, bent bridge differential pushing can be achieved through an oil pump control system of a common walking type jack, and the ideal state that deviation rectification is almost not needed theoretically is achieved.

According to the forest and fruit tree body profiling flapping fruit harvester based on the special-shaped crankshaft structure, transmission is achieved through special-shaped crankshafts with different crank throw eccentricity degrees, and the movement amplitude of flapping strips is limited through the inner side edges of amplitude limiting plates; the purpose that the flapping strips are arranged in a manner of imitating the contour of a tree crown can be achieved while the flapping strips are flapped, the flapping strips are arranged in a shape of imitating a tree shape, missed flapping of the top of the tree crown and the pole position of the symmetry axis is avoided, and the net picking rate of different positions is increased. The device comprises a chassis vehicle body and a tree-like flapping device, in the tree-like flapping device, a crankshaft with a plurality of crank throws is rotationally arranged on a base, and the eccentric distances of the crank throws are different; the lower end of each beating strip is hinged to a crank throw of the crankshaft; opposite amplitude limiting plates are arranged on the higher parts of the two sides of the base, and an amplitude limiting hole is formed between the opposite inner side edges of the two amplitude limiting plates; the distance between the inner side edges of the two amplitude limiting plates close to the center of the amplitude limiting plate in the direction parallel to the axial direction of the crankshaft is smaller than the distance between the inner side edges of the two amplitude limiting plates close to the two ends of the amplitude limiting plate.

The invention relates to the technical field of cleaning of cutting equipment, in particular to a cleaning device for a band sawing machine. Rotation is transmitted to a rotating rod through a bevel gear set, through meshing transmission of a transmission gear and a rack, a mounting column is pushed to drive a scraping plate to move transversely, then the scraping plate abuts against a cutting saw blade for scraping, the scraping plate abuts against the cutting saw blade, and chippings on the surface of the cutting saw blade are scraped away; after materials are detected through an infrared grating sensor, an electric signal is sent to a control cabinet, a servo motor is triggered to drive a crank to drive a sliding rod to annularly rotate, the sliding rod is rotationally connected with a connecting rod through a lantern ring, and a mounting base is pulled to enable a striker plate to swing in an arc shape; and the mounting base can only rotate with the rotating shaft as the circle center, so that one end of the mounting base drives the material blocking plate to only swing downwards in a reciprocating mode, chippings, close to the material guiding shell, of the edge of the material blocking plate slide down towards the middle, and the chippings can be conveniently cleaned.

The invention discloses multi-station welding equipment for automobile part machining and a method of the multi-station welding equipment, and relates to the field of automobile part machining. The multi-station welding equipment comprises a supporting table and a welding table rotationally installed at the top of the supporting table, a plurality of clamps are installed at the top of the welding table, a control cabinet is installed on one side of the supporting table, and a welding machine is installed on one side of the control cabinet; two transfer assemblies are installed on one side of the top of the supporting table. The driving block is driven by the crank to slide in the groove of the rotating plate, so that rotating motion is converted into intermittent indexing rotation of the rotating plate, the welding table is finally driven to rotate, the indexing precision is determined by the number of the driving grooves and strictly corresponds to a clamp station, it is ensured that each part can be accurately stopped below the welding machine, and the welding efficiency is improved. In order to guarantee the stability during machining, after the welding table rotates and is positioned, the locking mechanism can be immediately started to firmly fix the welding table, displacement in key welding and drilling procedures is effectively prevented, and therefore the accuracy and consistency of final machining are guaranteed.

The invention discloses a body position fixing device for radiology department examination, which comprises a bed body, a limiting mechanism, an unlocking mechanism and a plurality of fixing units, the limiting mechanism, the unlocking mechanism and the plurality of fixing units are arranged on the bed body, and the limiting mechanism and the unlocking mechanism are matched with the fixing units. Each fixing unit comprises a clamping plate, a first connecting rod, a second connecting rod, a crank, a movable block, a cylinder and a base, a movable groove is formed in the base, the cylinder is arranged in the movable groove and connected with the movable block, the second connecting rods are symmetrically arranged on the two sides of the movable block, the crank and the movable block are rotationally connected with the second connecting rods, and the crank is rotationally connected with the clamping plate; the clamping plate and the base are both rotationally connected with the first connecting rod. Through the application of the body position fixing device for examination in the radiology department, the operation process is simplified, the operation burden of medical staff is relieved, and the working efficiency of the medical staff is improved.

According to the forest and fruit tree body profiling flapping fruit harvester based on tree form recognition, the flapping action of the flapping strips is achieved through rotation of the crankshaft and push-pull of the piston rod of the air cylinder, different portions of a tree crown can be effectively beaten, missed flapping of the top of the tree crown and the pole portion of the symmetry axis can be avoided, the net picking rate is uniform, and the automation degree is high. The device comprises a chassis vehicle body and a tree-like flapping device, the tree-like flapping device comprises a base arranged on the chassis vehicle body, at least two bearing seats are arranged on the base, a crankshaft with a plurality of crank throws is connected to the bearing seats, a driving device for driving the crankshaft to rotate relative to the bearing seats is arranged on the base, and the lower end of each flapping strip is hinged to one crank throw of the crankshaft. Each sleeve is arranged on the corresponding beating strip in a sliding mode, a plurality of air cylinders arranged in the axial direction of the crankshaft are arranged on the base, and the end of a piston rod of each air cylinder is hinged to the corresponding sleeve.

The application discloses a raw material sampling device for photoresist production and relates to the photoresist production field.The raw material sampling device comprises a bottom plate and a storage box fixedly installed on one side of the top of the bottom plate.In the sampling process, the driving motor drives the first crank through the belt transmission member, the first push rod is prompted to perform the circular motion, and then the first driving block is driven to slide, the mechanism ensures the swing of the swing rod, thereby causing the reverse force of the second driving block, the second crank is also moved, the rotating rod transmits the force to the sliding block, and the swing of the movable rod is caused, the movement directly controls the movement of the second fixed rod and the sampling member, the sampling tube can be accurately cut into the inside of the sample storage box, stable and consistent sampling is realized, sampling is carried out under the same standard and condition each time, the consistency of the sampling amount is ensured, the reliability of data is improved, and in addition, the automatic sampling process in the closed environment maximally reduces the external pollution risk.

The application discloses a kind of automobile seat slide rail structures, it is related to the technical field of automobile accessories, it includes outer rail, inner rail, rocker mechanism and guiding limiting mechanism;Rocker mechanism includes the rod body being arranged in inner rail, the proximal end of rod body is connected with crank after extending out of inner rail, the distal end of rod body is provided with locking plate and torsion spring;The side of locking plate is connected with rod body, the other side of locking plate is provided with several clamping teeth;The side wall of outer rail is provided with locking hole compatible with clamping tooth;Guiding limiting mechanism includes fixed plate, limiting pin and limiting block;Fixed plate is arranged in inner rail and below rod body, the middle part of fixed plate is provided with guiding slot along the axial direction of inner rail;The lower end of limiting pin is connected with the inner bottom wall of outer rail, the upper end of limiting pin is passed through guiding slot and then abuts on rod body;Limiting block is provided with through hole for rod body to pass through, and the upper end of limiting block is connected with inner rail, the lower end of limiting block is connected with fixed plate;Limiting pin and limiting block are made of rubber material.

The utility model relates to the field of agricultural machinery, in particular to a residual film picking and recycling straw beating machine, which comprises a main frame, a traction frame and traveling wheels, and a straw beating device, a residual film picking roller, a packing device and a transmission device are arranged on the main frame. The plastic film residue picking roller is characterized by structurally comprising a track disc device, a roller body, a center transmission rotating shaft, a shaft disc, a roller side plate, a film picking elastic tooth set, a film picking crank and a crank roller. The machine is reasonable in structure, economical and practical, and can realize the combined operation of picking, recycling and packaging the residual films and smashing and returning the straws to the field; in the picking process, the residual film picking roller can be utilized, the burden is small, the overall flexibility of the picking roller can be effectively improved, and the residual film picking operation efficiency is greatly improved; the special suspension traction frame is utilized to solve the actual problem that an included angle formed between power input and a transmission shaft is too small, and backward transmission of the locomotive is not facilitated, and flexible connection steering and transmission between the traction locomotive and the operation agricultural machine can be achieved.

A symmetrical link servo driving device, relating to the technical field of servo motors. The symmetrical link servo driving device comprises a driving mechanism, an electric motor, a gear reduction mechanism and a servo shaft rocker arm mechanism, wherein the gear reduction mechanism is in transmission connection with an output shaft of the electric motor, a servo shaft rocker arm mechanism is provided on the side of the gear reduction mechanism facing away from the electric motor, the servo shaft rocker arm mechanism comprises a base body, a servo shaft is rotationally connected to an inner cavity of the base body, and a crank is provided at a shaft body of the servo shaft; a self-locking mechanism capable of locking the servo shaft is provided at the bottom of the inner cavity of the base body; and a driving mechanism is provided on one side of the electric motor, the driving mechanism comprises a housing, a lead screw is rotationally connected in the housing, and the lead screw is correspondingly in transmission connection with an output gear of the gear reduction mechanism. The present invention has a simple structure, and the electric motor and the driving mechanism are arranged in parallel to effectively reduce the overall volume, such that the whole device is compact and small. The self-locking mechanism capable of locking the servo shaft is provided at the bottom of the inner cavity of the base body, that is, when the servo shaft stops rotating, the servo shaft can be locked by means of the self-locking mechanism, thereby preventing an external force from being transmitted to the driving mechanism by means of the servo shaft.

A crossbow crank can comprise a drive shaft selectively coupled to a one-way bearing that allows rotation of the drive shaft and an associated spool in a first direction and impairs rotation of the drive shaft and the spool in a second direction. The drive shaft can be automatically locked and unlocked relative to the one-way bearing, allowing the bearing to control operation of the drive shaft, via an axially compressible brake. The crossbow crank can be in the form of a removeable and replaceable module that can be positioned on right or left sides of a crossbow for right or left sided operation. A related method of use is provided.

The invention discloses a multi-degree-of-freedom clamping mechanism of an industrial robot. The multi-degree-of-freedom clamping mechanism comprises a control base, a shaft base set and a clamping assembly. A first driving motor and a second driving motor are mounted on the bottom surface of the control seat; the shaft seat group is rotationally mounted on the inner side of the control seat and consists of a ring seat, a first transmission gear, a second transmission gear, a roll shaft and a shaft rod, the first transmission gear is meshed with the first driving motor to realize integral deflection, and the second transmission gear is meshed with the roll shaft through a bevel gear to realize rotary transmission; the clamping assembly comprises a swing seat, a clamping seat and a clamping lug, and a crank gear is driven by a shaft rod and a worm to drive the clamping lug to be opened and closed. And a touch switch is arranged on the guide cover and is matched with the servo control module to realize limiting protection and automatic resetting. The multi-posture clamping mechanism is compact in structure, high in degree of freedom and stable in transmission, multi-posture clamping and intelligent safety control of workpieces can be achieved, and the operation flexibility and safety of the industrial robot are remarkably improved.

The utility model discloses a safety hand-cranking mechanism for a point switch, which relates to the technical field of railway turnout switching equipment and comprises a fixing sleeve, a first bevel gear and a second bevel gear, two holes are arranged on the fixing sleeve, and the axes of the two holes are intersected; the end of the hand-cranking projecting shaft is located in one hole of the fixing sleeve, and the first bevel gear is arranged at the end of the hand-cranking projecting shaft; the other hole of the fixing sleeve is used for inserting the hand crank, and the second bevel gear is arranged at the end of the hand crank; the hand crank is inserted into the other hole of the fixing sleeve, so that the first bevel gear is meshed with the second bevel gear, and the switch machine is driven by rotating the hand crank; an identification ring is mounted in a hole, into which the hand crank is inserted, in the fixing sleeve; and an identification column is arranged on the hand crank in series with the second bevel gear. The included angle between the hand-cranking handle and the hand-cranking projecting shaft can be designed as required, so that the selection flexibility of the insertion position of the hand-cranking handle is greatly enhanced. Corresponding identification of the point switch and the hand crank is achieved, and safety is improved.

An aircraft wing includes a fixed structure and a linear hydraulic slat actuator attached to the fixed structure. The linear hydraulic slat actuator is oriented spanwise along the aircraft wing. The aircraft wing also includes an actuator output link and a slat attached to the actuator output link. The aircraft wing also includes a bell-crank coupled to the linear hydraulic slat actuator and to the actuator output link. In response to spanwise movement of the linear hydraulic slat actuator, the bell-crank is configured to move the actuator output link in a different direction that enables the slat to move between a retracted position and an extended position.

A removeable vehicle hardtop lift apparatus is described which includes a lower platform, an upper platform and a linear actuator there-between. The upper platform may have adjustable supports, The linear actuator may be configured to move the upper platform linearly. The linear actuator may include a drive mechanism with a hand crank that is operable to cause the linear actuator to raise and lower the upper platform.

The invention discloses a visual calibration measuring device for vortex crankshaft machining, and relates to the technical field of vortex crankshaft visual measurement, the visual calibration measuring device comprises a box body, and the outer walls of the two sides of the box body are fixedly connected with conveying frames; a first conveying belt used for detecting and feeding the crankshaft body and a second conveying belt used for discharging after the crankshaft body is detected are arranged in the two conveying frames correspondingly, feeding grooves are formed in the two sides of the box body correspondingly, and the first conveying belt and the crankshaft body both penetrate through the feeding grooves; and two groups of detection assemblies for performing visual calibration measurement on the crankshaft body are arranged in the box body. According to the invention, through a front and back double-sided detection mechanism, the problem of missing detection of traditional single-sided detection is avoided, high-precision image acquisition of a high-speed camera is matched, the detection precision of parameters such as the size and the shape of each part of the crankshaft is ensured, and the processing quality of the vortex crankshaft is fundamentally ensured.

The cab overturning hydraulic cylinder comprises a cylinder barrel, a piston rod assembly and a valve seat, the piston rod assembly comprises a piston and a piston rod, the piston divides an inner cavity of the cylinder barrel into an upper oil cavity and a lower oil cavity in a sealed mode, a first oil channel and a second oil channel which are arranged in an isolated mode are arranged in the valve seat, and one end of the first oil channel is communicated with an oil tank. One end of the first oil duct is communicated with the upper oil cavity, the other end of the first oil duct is communicated with the lower oil cavity, a first valve port and a first pressure limiting assembly arranged at the first valve port are arranged in the first oil duct, and the oil return pressure of hydraulic oil in the lower oil cavity is limited through the first pressure limiting assembly; the other end of the second oil channel is communicated with the oil pipe, a second valve port and a second pressure limiting assembly arranged at the second valve port are arranged in the second oil channel, the oil return pressure of the hydraulic oil in the upper oil cavity is limited through the second pressure limiting assembly, the good anti-explosion effect is achieved, and the working safety of the cab is effectively improved.

The invention relates to a dynamic compensation assembly of a compressor, a design method of the dynamic compensation assembly and the compressor, and relates to the field of scroll compressors. A dynamic compensation assembly of the compressor comprises a groove disc, a static scroll plate with static scroll teeth, a movable scroll plate with movable scroll teeth, four elastic compensation mechanisms installed in four bearing holes respectively, three crank throws and a crankshaft. When the movable scroll wrap and the static scroll wrap are in interference due to excessive meshing, the spring deforms and deviates from the first bearing, so that the pressure of the contact surface of the movable scroll wrap and the static scroll wrap is reduced while the movable scroll wrap and the static scroll wrap are kept fit in the working process, and the tooth surface abrasion is reduced; when the movable scroll wrap and the static scroll wrap are not fully meshed and a gap exists, under the action of revolution centrifugal force, the movable scroll plate drives the movable scroll wrap to be attached to the static scroll wrap, and excessive impact is avoided under the action of the spring, so that sealing is achieved, air leakage is avoided, the service life is effectively prolonged, and the working stability is effectively improved.

The invention belongs to the technical field of defect detection, and particularly relates to a forging part surface defect detection device which comprises a base, a controller is connected to the side wall of the base, a moving assembly is arranged in the base, and crankshafts are clamped by the moving end of the moving assembly and the surface of the base through clamping assemblies. The upper side wall of the base is fixedly connected with a mounting frame. When the surface defects of the crankshaft are detected, the surfaces of a journal, a crank arm and a balance block are synchronously detected in different areas, the device is adaptive to crankshafts of different models, detection blind areas caused by a complex structure can be greatly eliminated, and it is ensured that the defects such as microcracks and scratches of all key parts are not missed; meanwhile, the detection efficiency can be remarkably improved, and time loss caused by single-region successive detection is avoided; and the debugging period of tool clamps and parameters during detection of crankshafts of different models can be shortened, the equipment investment and the production cost are reduced, and the universality and the flexibility of the detection system are enhanced.

The invention provides an automatic unhooking tool for large bag stacking, and belongs to the technical field of automatic tools for large bag cargo carrying and stacking operation, the automatic unhooking tool comprises a rotary support capable of being connected with a crank arm crane, the lower end of the rotary support is connected with a rack, the rack comprises two cross beams and a longitudinal beam connected between the two cross beams, and the longitudinal beam is connected with the crank arm crane. At least two positioning mechanisms are fixed to the bottom of each cross beam, concave notches are formed in the lower ends of the positioning mechanisms, hook mechanisms are installed on one sides of the positioning mechanisms and comprise hydraulic cylinders and hook heads, one ends of the hydraulic cylinders are hinged to the positioning mechanisms, the other ends of the hydraulic cylinders are hinged to the hook heads, and the upper ends of the hook heads are hinged to the positioning mechanisms. When the hook head rotates, the lower end can be inserted into the notch in the lower end of the positioning mechanism. The technical problems that in the prior art, when large-bag goods are stacked and unhooked, operation efficiency is low, and potential safety hazards are high are solved.

The invention belongs to the technical field of suture line cutting, and particularly relates to a suture line cutting device for continuously preparing a circumferential barb structure, which comprises a support system, a suture line penetrates through the center of the support system, and the middle part of the support system is fixedly connected with a pneumatic clamping jaw for clamping the suture line; the four crankshafts are arranged around the suture line, the four crankshafts are rotationally connected to the four corners of the support system respectively, and cranks of the crankshafts are arranged in parallel; the cutting frame is rotationally connected with the four crankshafts; the cutting blades are fixedly connected with the cutting frame, the cutting blades are arranged around the suture line, and the cutting blades are used for cutting scratches on the surface of the suture line; the fixed end of the transmission structure is connected with the support system, the movable end of the transmission structure is connected with the four crankshafts, and the transmission structure enables the four crankshafts to rotate synchronously. During use, the four crankshafts synchronously rotate through the transmission structure, the four crankshafts simultaneously drive the cutting frame to translate in the vertical plane where the cutting frame is located, and the multiple cutting blades sequentially cut scratches on the surface of a suture line to form a barb structure.