343results about How to "Easy injection" patented technology

The invention discloses a full-automatic milk somatic cell detection system and method based on fluorescence analysis. According to the full-automatic fluorescence microscopic examination system, automatic sample introduction and automatic mixing are completed through the automatic sample introduction module, automatic focusing of dyed samples is completed through the automatic focusing module, automatic photographing processing and automatic counting are completed through the automatic photographing and counting module, and therefore full-automatic fluorescence microscopic examination is achieved. According to the method, the automatic detection level is remarkably improved, the consistency of the detection process is ensured, and manual operation errors are reduced, so that the experiment efficiency, the data accuracy and the reproducibility are improved; compared with traditional off-line detection or laboratory detection, the method and system provided by the invention have better real-time performance and accuracy, and also have higher automation degree.

The invention discloses a spraying device for grassland ecological soil remediation in the technical field of ecological remediation. The spraying device comprises a vehicle body, a storage assembly is installed at the top end of the vehicle body, a lifting cavity is formed in the vehicle body, a lifting assembly is arranged in the lifting cavity, a supporting plate is fixedly connected to the bottom of the lifting assembly, and a plurality of spraying assemblies are linearly arrayed at the bottom of the supporting plate; a pump assembly is arranged in the vehicle body; the spraying assembly and the storage assembly are both communicated with the pump assembly; and each spraying assembly comprises a rotating hole column fixedly connected to the bottom of the supporting plate, a spraying ring is annularly arranged on the surface of each rotating hole column, a plurality of spraying openings communicating with the storage assembly are formed in the bottom of each spraying ring, and a plurality of injection assemblies are arranged in each rotating hole column. Through cooperative assistance of the lifting assembly, the spraying assembly and the injection assembly, when the grassland surface soil is hard, spraying remediation can be conducted on the grassland soil surface, meanwhile, injection of liquid medicine can be completed by going deep into the grassland soil, and the ecological remediation effect of the grassland soil is improved.

The invention belongs to the field of organic electroluminescent materials, and discloses a blue light host material, a preparation method and an organic electroluminescent device. The structure of the blue light host material is as shown in a chemical formula I: # imgabs0 #. After the blue light host material provided by the invention is applied to the organic electroluminescent device, the driving voltage of the photoelectric device can be reduced, the luminous efficiency of the photoelectric device can be improved, and the service life of the photoelectric device can be prolonged.

The abrasion-resistant chain is formed by connecting a plurality of chain link units in series, one end, provided with an end piece, of a pin shaft is provided with an oil injection hole channel, the oil injection hole channel is arranged in the axial direction of the pin shaft, one end, away from the end piece, of the oil injection hole channel is provided with an oil outlet channel communicated with the oil injection hole channel, and the oil outlet channel is arranged in the direction perpendicular to the axial direction of the pin shaft. The two ends of the oil outlet channel penetrate to the outer wall of the pin shaft. A plugging assembly is arranged at the end, close to the end piece, of the oil injection hole channel and comprises a clamping piece, a pressing piece and a spring. A through hole is formed in the center of the clamping piece, the clamping piece is arranged on the inner wall of the oil injection hole channel, and a clamping groove is formed in the bottom of the through hole; the pressing piece comprises a pressing part, a middle plate and a first connecting part arranged between the pressing part and the middle plate, and a sealing block is arranged below the middle plate; the pressing piece is rotationally arranged in the oil injection hole channel, the middle plate is slidably located in the through hole, the spring is located between the pressing part and the clamping piece, and the sealing block abuts against the side wall of the clamping groove.

The invention relates to the technical field of organic electroluminescent devices, and discloses a fluorine-containing pyrimidine derivative organic compound and application thereof, a perovskite solar cell and an organic electroluminescent device. The organic compound has a structure as shown in a formula (I). The fluorine-containing pyrimidine derivative organic compound provided by the invention can improve the performance of a device, reduce the driving voltage, improve the current efficiency and prolong the service life of the device. # imgabs0 #

The invention relates to the technical field of organic electroluminescent devices, and discloses a cyanopyrimidine derivative organic compound and application thereof, a perovskite solar cell and an organic electroluminescent device. The organic compound has a structure as shown in a formula (I). The cyanopyrimidine derivative organic compound provided by the invention can improve the performance of a device, reduce the driving voltage, improve the current efficiency and prolong the service life of the device. # imgabs0 #

The utility model relates to the technical field of industrial sewage treatment equipment, and discloses industrial sewage treatment equipment convenient to overhaul, which comprises a treatment box, a sealing cover is arranged at the top of the treatment box, a fixing mechanism is arranged at the bottom of the sealing cover, a mounting plate is arranged at the top of the sealing cover, and a mounting frame is arranged in the treatment box. A filter screen is arranged on the mounting frame, a connecting plate is fixedly mounted on the mounting frame, connecting rods are fixedly mounted on the two sides of the top of the connecting plate, supporting plates are fixedly mounted on the two sides of the treatment box, a motor is arranged on the top of one supporting plate, and a screw rod is fixedly connected to the output end of the motor; the screw rod is in threaded connection with a moving block, and a sliding rod is fixedly mounted at the top of the other supporting plate; according to the utility model, filter residues accumulated on the filter screen in the treatment box can be cleaned while equipment elements are conveniently overhauled, so that the subsequent filtering efficiency is ensured.

The utility model discloses an oxidation reactor for production of m-toluic acid, and relates to the technical field of production of m-toluic acid, the oxidation reactor comprises a shell, an oxygen injection assembly and a reaction mixing assembly, the oxygen injection assembly is arranged at the lower part in the shell, and the oxygen injection assembly comprises an annular pipe, an oxygen pipe and an air hole; six groups of oxygen pipes are uniformly connected to the upper part of the annular pipe, air holes are formed in the outer surfaces of the oxygen pipes, and a reaction mixing assembly is mounted in the middle of the interior of the shell. According to the oxidation reactor for production of m-toluic acid, reciprocating lifting of a movable sleeve and a connecting rod enables a cleaning wiper on the inner wall of a lantern ring to clean the outer surface of an oxygen pipe on one hand, and reciprocating lifting of the connecting rod, a fixed plate, a rotating shaft and stirring blades on the other hand can promote vertical mixing of feed liquid in the shell, so that the feed liquid and oxygen are stirred and mixed; meanwhile, the water flow impacts the stirring blades, so that the rotating shaft and the stirring blades rotate to further mix and react the feed liquid and oxygen.

The invention discloses a high-precision brushless motor, and relates to the field of brushless motors, the high-precision brushless motor comprises a shell, a stator is fixed in the shell, a rotor is arranged in the stator, two ends of the rotor are rotatably connected with bearings, the shell is provided with an active lubrication noise reduction mechanism, the active lubrication noise reduction mechanism corresponds to the bearings, and the active lubrication noise reduction mechanism is connected with a motor. And an extrusion stabilizing mechanism is arranged on the bearing. The active lubrication noise reduction mechanism monitors noise generated by rotation of the two bearings, when the bearings lack lubrication and generate large noise, the active lubrication noise reduction mechanism injects lubricating oil to the bearings, the bearings are lubricated through the lubricating oil, and meanwhile the active lubrication noise reduction mechanism drives the extrusion stabilizing mechanism; the extrusion stabilizing mechanism limits injection of the active lubrication noise reduction mechanism, so that when the brushless motor works, generated noise can be reduced, the frequency of maintaining the brushless motor is reduced, and the service life of the brushless motor is prolonged.

The utility model discloses a horizontal high-precision static pressure main shaft device, which relates to the technical field of static pressure main shaft devices and comprises a shaft sleeve and a main shaft, a transmission bearing is welded on the inner wall of the shaft sleeve, the outer surface of the main shaft is fixedly connected with the inner wall of the transmission bearing, and two groups of dismounting mechanisms are arranged between the shaft sleeve and the main shaft. The dismounting and mounting mechanism comprises a shaft cover and a mounting groove formed in the outer surface of the shaft sleeve. According to the utility model, the effect of convenient disassembly and assembly can be realized by arranging the disassembly and assembly mechanism, so that the shaft cover can be conveniently disassembled from the shaft sleeve, the interior of the shaft sleeve can be conveniently cleaned at regular intervals, a large number of screws do not need to be disassembled, a large amount of time is saved, the cleaning and maintenance efficiency is improved, and the main shaft is ensured to stably rotate at high precision; by arranging the oil injection mechanism, pressure oil can be conveniently injected between the shaft sleeve and the main shaft, so that a pressure oil film is conveniently formed, friction and vibration of the main shaft are effectively reduced, and machining precision and surface quality are improved.

The invention relates to the technical field of label stamping, and discloses a metal label stamping die for transportation and a using method thereof.The metal label stamping die comprises a stamping mechanism, the stamping mechanism further comprises a lower die, an upper die is arranged at the top of the lower die, a metal plate to be stamped is placed on a jacking plate, then a stamping cylinder is started to stretch out, and the upper die is arranged on the jacking plate; the upper die is pushed to descend, the first pushing rolling wheel and the second pushing rolling wheel descend together, the first pushing rolling wheel can make contact with the inclined face of the inclined face block, the inclined face block is pushed to be away from the forming frame and separated from the jacking plate, the jacking plate can descend till the top of the jacking plate is attached to the top of the forming frame, a complete stamping frame is formed, and then stamping is conducted; and after stamping is completed, the stamping cylinder retracts, the upper die is driven to ascend, a second pushing rolling wheel can push a slope block to be close to a forming frame to make contact with a jacking plate to jack the jacking plate and drive the metal label to ascend, the metal label is prevented from being directly impacted, and the jacked part of the metal label is prevented from deforming.

The utility model relates to the technical field of gap filling equipment for building decoration, in particular to a gap filling device for building decoration. The gap filling device for building decoration solves the technical problems that when the gap filling device for building decoration is used, the gap filling device needs to be supported in the whole process once a user conducts operation, and inconvenience is caused; according to the technical scheme, the gap filling device for building decoration comprises a gap filling device body, a buffering assembly, a filling assembly, a moving assembly, a material storage assembly, a material injection assembly and an excitation assembly; compared with traditional gap filling equipment for building decoration, the gap filling equipment for building decoration needs to be supported in the whole process when a user carries out operation, and inconvenience is caused, the gap filling device for building decoration is provided with the buffer structure and the moving structure, and when the user carries out gap filling operation, the gap filling equipment for building decoration is convenient to use. The gap filling equipment can be supported in an auxiliary mode, a user does not need to support the gap filling equipment, and the labor intensity of an operator is reduced.

The invention provides a liquid path unit, an energy storage device and an energy storage system, and relates to the technical field of energy storage. The liquid path unit is provided with a circulation input port and a circulation output port and comprises a plurality of heat management components, a first pipeline assembly, a second pipeline assembly, a first switch piece and a second switch piece. The heat management component is provided with an inlet and an outlet; the first pipeline assembly is communicated with the circulating input port and the inlet of each heat management component; the second pipeline assembly is communicated with the circulating output port and the outlet of each heat management component; the first switch piece is arranged on the first pipeline assembly and used for opening or closing the circulation input port. And the second switch piece is arranged on the second pipeline assembly and used for opening or closing the circulating output port, so that the heat exchange medium can be injected into the liquid path unit before the liquid path unit and the refrigerant unit are assembled, and the heat exchange medium can be conveniently injected. The first switch piece and the second switch piece can enable the liquid path unit to form a self-sealing system, so that the liquid path unit can store and transport the heat exchange medium.

The utility model discloses a filling device for preparing a chromatographic column, which relates to the technical field of filling devices and comprises a bottom plate, four telescopic rods are mounted at the upper end of the bottom plate, a vibration plate is mounted at the upper ends of the telescopic rods, a power cabin is mounted at the upper end of the bottom plate close to the left side, a motor is mounted in the power cabin, and the output end of the motor is connected with a rotating shaft. One end of the rotating shaft penetrates through the power cabin and extends to the lower end of the vibration plate, two convex flywheels are fixedly installed at the positions, located at the lower end of the vibration plate, of the outer side of the rotating shaft, the outer sides of the four telescopic rods are all sleeved with springs, the two ends of each spring are fixedly connected with the vibration plate and the bottom plate correspondingly, and a lifting guide rail is fixedly installed at the upper end of the vibration plate through screws. A vertical plate is installed in the lifting guide rail, connecting blocks are fixedly connected to the positions, close to the upper end and the lower end, of one side of the vertical plate, clamping rings are fixedly connected to one ends of the connecting blocks, a storage box is installed at the upper end of the power cabin, and a conveying pump is installed at the upper end of the storage box.

The utility model discloses a balloon dilatation catheter with a double-cannula structure, relates to the technical field of medical instruments, and solves the technical problem that far-end myocardium or tissue ischemia of a patient is easily caused when a balloon of the balloon dilatation catheter is kept in a dilatation state for a long time. Comprising an outer tube, an inner tube penetrating through the outer tube and a balloon arranged on the outer tube in a sleeving mode, the outer tube is composed of a first outer tube body and a second outer tube body, the inner tube is composed of a first inner tube body and a second inner tube body, a transition part of an annular structure is installed between the first outer tube body and the second outer tube body, and a blood channel is formed in the transition part in the axial direction in a penetrating mode. The blood channel is communicated between the first inner tube and the second inner tube, and a guide wire is arranged in the blood channel, the first inner tube and the second inner tube in a penetrating mode. When the balloon is kept in an expansion state for a long time, blood of a patient can still penetrate through the balloon to supply blood to far-end myocardium or tissue, so that body injury caused by lack of normal blood supply to the patient is avoided.

The utility model relates to the technical field of electronic material preparation, and discloses a conductive silver paste preparation device which comprises a stirring barrel, a motor used for supplying energy is arranged at the top of the stirring barrel, a valve used for controlling the proportion is arranged at the top of the stirring barrel, a storage barrel used for storing a solvent is arranged at the top of the valve, and the motor is connected with the storage barrel. And a bracket for keeping stability is arranged at the bottom of the stirring barrel. According to the conductive silver paste preparation device, through cooperative arrangement of the stirring barrel and the motor, adhesion of silver paste in the device after preparation can be reduced during use, the influence on the re-preparation quality of the silver paste is avoided, through arrangement of the stirring barrel, the injection of silver paste raw materials can be more convenient, and meanwhile, the prepared silver paste can be taken out more quickly; and by arranging the motor, the silver paste can be stirred through rotation, so that the silver paste can be more quickly and uniformly mixed, meanwhile, the silver paste on the inner wall of the stirring barrel can be scraped, and the working efficiency of the device is improved.

The utility model discloses centrifugal separation and recrystallization equipment for organic chemicals, which belongs to the technical field of organic chemical processing and comprises a crystallization cylinder, a centrifugal cylinder component is arranged on one side of the crystallization cylinder, a mounting hole is formed in the crystallization cylinder, the crystallization cylinder is fixedly connected with a feeding cylinder through the mounting hole, and the feeding cylinder is fixedly connected with the crystallization cylinder. An adjusting plate is movably connected into the feeding cylinder, and the outer diameter of the adjusting plate is matched with the inner diameter of the feeding cylinder. According to the centrifugal separation and recrystallization equipment for the organic chemicals, by arranging an adjusting plate, an electric telescopic rod, a connecting plate and a supporting rod, the capacity of the interior of a feeding barrel is adjusted in the using process of the crystallization equipment, so that different quantities of material flows are conveniently injected into a crystallization barrel for crystallization treatment; according to the crystallization barrel, quantitative crystallization of materials is guaranteed, errors caused by too many or too few materials in the processing process are avoided, meanwhile, quantitative crystallization is conducted on the materials, and the situation that the materials are wasted can be avoided.

The application discloses a compound and application thereof, and belongs to the technical field of display. A chemical structural formula of the compound is shown in the following formula: wherein Z1 and Z2 are independently O, S or Se; R1 and R2 are independently ; or one of R1 and R2 is ; Z3 to Z6 are independently N or CR4; the other of R1 and R2, R3 and R4 are independently hydrogen, deuterium, fluorine, cyano, C1-C10 alkyl, C1-C10 perfluoroalkyl, C1-C10 perfluoroalkoxy, C1-C10 perfluoroalkylthio, pentafluorothio, one of substituted or unsubstituted C6-C30 aryl, or substituted or unsubstituted C3-C30 heteroaryl; and A is O, S, S=O, SO2 or Se. The compound has high charge transfer capacity and thermal stability, and an OLED device prepared based on the compound has low working voltage, high efficiency and long cycle life.

The utility model provides a photovoltaic panel sweeper and belongs to the technical field of sweepers. The photovoltaic panel sweeping machine comprises a main body and a cleaning mechanism, the main body comprises a supporting frame, a placing frame is fixedly installed on the upper end face of the supporting frame, a pair of installing bases are fixedly installed at one end of the placing frame, connecting shafts are rotationally connected into the installing bases, the cleaning mechanism comprises an installing frame, and sliding grooves are formed in the two sides of the installing frame. Sliding rods are fixedly mounted at the upper ends of the interiors of the sliding grooves, the sliding rods are slidably sleeved with mounting blocks, the bottom ends of the pair of mounting blocks are connected with the two ends of the connecting shaft correspondingly, first linear motors are fixedly mounted on the two sides of the upper end face of the mounting frame correspondingly, and a second linear motor is fixedly mounted between the moving ends of the pair of first linear motors; according to the photovoltaic panel cleaning machine, the practicability of the photovoltaic panel cleaning machine can be effectively improved, and the photovoltaic panel cleaning machine has high practical value.

The invention discloses a water machine measuring instrument panel pipeline manufacturing and mounting mold, and particularly relates to the technical field of instrument panel pipeline molds, the water machine measuring instrument panel pipeline manufacturing and mounting mold comprises a supporting frame, a forming assembly is arranged on the supporting frame, the forming assembly comprises a supporting plate arranged at the top of the supporting frame, a pressing plate is arranged at the top of the supporting plate, and a mold body is arranged on the supporting plate. All the cavity grooves can be gathered together, the cavity grooves and the die body form a cavity needed by workpiece forming, the workpiece forming quality is guaranteed, redundant raw materials can be easily extruded out, the quality of the raw materials in the later period of forming is tighter, traction force generated when the guide rods move upwards slides on the guide frame, and the quality of the raw materials is improved. Therefore, the third reinforcing module is separated from the second reinforcing module and the first reinforcing module, a formed workpiece is easy to demold on the mold body, and raw materials for subsequent forming are easy to take out.

The invention discloses an electric local anesthetic injection device and relates to the technical field of medical instruments, a fixed sliding rail is mounted at the top of a rotating flat head, fixed sliding blocks are slidably mounted at two ends in the fixed sliding rail, a bidirectional screw is rotatably mounted in the fixed sliding rail, a clamping plate is connected to the top of each fixed sliding block, and a handle is clamped in the middle of the clamping plate; a limiting sliding groove is formed in one end of the top of the handle, a fixing frame is installed at the other end of the top of the handle, a heat preservation electric heating plate is installed at the bottom of the fixing frame, and an injector is placed at the top of the fixing frame. The labor intensity of anesthetists is greatly reduced, when intramuscular injection is carried out on a patient, a needle head can be rapidly positioned, injection is convenient and fast, electric quantitative injection can also be carried out, two operation modes are adopted, and the anesthetic syringe is suitable for being used under different conditions, more comprehensive and reasonable in operation and suitable for being used and popularized.

The application provides a continuous foam rectification separation and purification device, which comprises a rectification tower and a defoaming cylinder; a stirring assembly is arranged in the defoaming cylinder, and the stirring assembly is connected with a driving mechanism; the stirring assembly comprises a circular pipe; a plurality of uniformly distributed cross pipes are fixedly connected around the circular pipe, and the cross pipes are provided with a plurality of liquid outlet holes in the length direction; a lifting mechanism is installed in the defoaming cylinder and connected with a connecting pipe fixedly connected with the top end of the circular pipe; a conveying mechanism is used for conveying a defoaming agent into the circular pipe; a feeding assembly is installed at the top inlet of the defoaming cylinder; the feeding assembly comprises an inner cylinder, an outer cylinder and an expansion pipe, a spiral channel is arranged between the inner cylinder and the outer cylinder, a plurality of micropores are arranged on the inner cylinder wall and communicated with the inner cylinder, and the plurality of micropores are uniformly distributed in the length direction of the channel; the expansion pipe is connected with the inner cylinder, and the bottom end of the expansion pipe is rotationally and sealingly connected with the top end of the connecting pipe. The preliminary defoaming during feeding and the secondary defoaming in the defoaming cylinder improve the defoaming effect.

The utility model relates to the technical field of gear inserts, and discloses a duplex injection molding gear insert structure which comprises a main body mechanism and an auxiliary mechanism, the auxiliary mechanism is located at the outer end of the main body mechanism, and the main body mechanism comprises a duplex injection molding gear insert body, a mounting rod and a first gear. The mounting rod is fixedly mounted in the middle of the duplex injection molding gear insert body, and the first gear is fixedly mounted at the upper end of the outer end of the mounting rod; the main body mechanism further comprises a second gear, a mounting block, a lubricating oil tank, an oil absorption cotton block, an oil dripping pipe and an oil guide cotton strip, the second gear is fixedly mounted at the lower end of the outer end of the mounting rod, the mounting block is fixedly mounted at the lower end of the mounting rod, and the lubricating oil tank is fixedly mounted at the upper end of the mounting rod. According to the duplex injection molding gear insert structure, by installing the main body mechanism, the connecting position of a duplex injection molding gear insert can be conveniently lubricated, friction and abrasion are reduced, functionality is improved, the use requirements of people can be conveniently met, and practicability is improved.

The invention relates to a hemostatic adhesive as well as a preparation method and application thereof, and relates to the technical field of biological medicines. The hemostatic adhesive comprises an aldehyde group modified polyethylene glycol high-molecular polymer, an amino high-molecular polymer and a thickening agent, the mass ratio of the aldehyde group modified polyethylene glycol high-molecular polymer to the amino high-molecular polymer to the thickening agent is 1: (0.2-20): (0.1-10). The hemostatic adhesive prepared by the invention is obtained through in-situ polymerization, is easy to inject, and can flow into and fill tissue gaps after injection to complete hemostatic packing; the hemostatic adhesive is high in gel forming speed, can be quickly adhered to the surface of a wound surface when acting on the wound surface, and does not fall off; the hemostatic adhesive physically isolates a wound from the external environment in the wound healing process, prevents wound infection, can be gradually degraded in vivo within 7-10 days, and is non-toxic and harmless.

The invention relates to the technical field of SHJ battery microcrystal coating, in particular to a linear continuous coating method for improving the N-surface field passivation effect of a heterojunction battery, which comprises the following steps of: S1, presetting the temperature of a PECVD (Plasma Enhanced Chemical Vapor Deposition) cavity to 200-260 DEG C, and feeding an N-type monocrystalline silicon wafer into the PECVD cavity; s2, the phase angle of a pair of independent power supplies in the HPT power supply and the passivation power supply is set to be 0-180 degrees; s3, starting a first HPT power supply; s4, starting a first passivation power supply, and obtaining an N1 layer on the surface of the N-type monocrystalline silicon wafer; then repeating the steps to obtain an N2 layer and an N3 layer in sequence; step S9, the N-type monocrystalline silicon wafer with the passivated N layer is sent out of the PECVD cavity; according to the invention, an electromagnetic field is formed by using a power supply with a phase angle of 0-180 degrees, the deposition area is controlled while the coating rate is accelerated, and meanwhile, due to the fact that the deposition area is controlled by the electromagnetic field, the effect of N-layer gradient doping in a single cavity is realized.

The invention relates to the technical field of chemical sampling, in particular to a bottle cap assembly and a chemical online sampling device and method. The chemical online sampling device comprises a device body, a working cavity is formed in the device body, the working cavity is sequentially provided with a sampling operation area, a sampling area and a waste liquid collecting area from top to bottom in the height direction, a sampling bottle is arranged at the sampling area, and a bottle cap assembly is arranged at the sampling bottle. According to the invention, the sampling efficiency of chemicals is improved, and the sample is prevented from being polluted by the external environment, so that the accuracy of chemical sample determination is better improved, and the method can be applied to preparation and experiments of high-purity chemicals.

The utility model discloses a spring oil injection lubricating device for application on the pivot, including the inner shaft sleeve of setting in the both ends of pivot, the inner shaft sleeve and pivot are for interference fit, the inner shaft sleeve sets up the outer shaft sleeve, the outer shaft sleeve and inner shaft sleeve are for clearance fit, the outer shaft sleeve sets up on the support, the outside of outer shaft sleeve is provided with first gasket, first gasket engages in the support, be provided with first sealing washer between first gasket and the inboard of support, first sealing washer and pivot close contact, the other side of outer shaft sleeve is provided with a pair of small axle sleeve, be provided with a plurality of second gaskets between a pair of small axle sleeve, the spring of setting up on small axle sleeve, be provided with second sealing washer, wave spring gasket respectively between spring and outer shaft sleeve, the utility model discloses through the tool compression spring, and wave spring gasket will naturally open and will sealing washer open to the inside injection lubricating oil is convenient to the pivot oil injection lubricating maintenance is realized.