244 results about "Small head" patented technology

A piston pin hole friction and wear test and torque measurement device in power machinery field, comprising a driving system, a torque measurement system, a loading system, a temperature control system, an oil supply system and a central controller. The driving system simulates the oscillation of the connecting rod. The loading system simulates the time-varying cylinder pressure load. The oil supply system and the oil channels of the connecting rod, bushing, and piston pin simulate the oil supply state. The torque measurement system comprises a total friction torque measurement device and a small head bushing hole friction torque measurement device, and measures the friction torque at the piston pin seat hole and the piston pin small head hole in real time. The temperature control system simulates the thermal load. The present application carries out tests based on actual components and realizes real-time measurement of friction torques.

The invention discloses a structural tower suitable for a large wind turbine generator, which comprises a steel tower drum, a switching node and a lattice tower, the lattice tower comprises a foot expanding section, a straight section and a variable angle section for connecting the foot expanding section and the straight section, the straight section is positioned above a blade tip, and the foot expanding section is positioned below the blade tip; a prestressed cable bundle channel is formed in the variable-angle section in the axial direction of the variable-angle section, a smooth inward-convex structure facing the steering side is formed in the position, where the prestressed cable bundle steers, of the prestressed cable bundle channel, and the cross section, at the smooth inward-convex structure, of the prestressed cable bundle channel is a bell-shaped hole with one large end and the other small end; the small end of the bell-shaped hole is an arc section with the diameter larger than that of the prestressed cable bundle, the small end of the bell-shaped hole faces the steering direction of the prestressed cable bundle, and the shape of the bell-shaped hole is gradually reduced from the two ends of the smooth inward-protruding structure to the center hole, so that the smooth inward-protruding structure is formed. According to the application, the prestressed cable bundle can be controlled and uniformly steered, and the prestress loss is reduced.

The invention relates to the technical field of pipe fitting machining, in particular to a pipe fitting machining surface spraying device and method. Comprising a base assembly, a shifting assembly installed on the base assembly, a spraying assembly installed at the output end of the shifting assembly, an outer dust removing assembly installed on the spraying assembly, a first-stage driving assembly installed on the base assembly and a steering assembly connected to the output end of the first-stage driving assembly. The first-stage driving assembly is installed on the steering assembly, the second-stage driving assembly is installed on the steering assembly, the alignment assembly is movably connected to the steering assembly, the first-stage driving assembly is used for driving the steering assembly to rotate according to a preset angle, and the second-stage driving assembly is used for driving the alignment assembly to rotate; the gas spring pipe fitting is fixed, meanwhile, the small head end is turned over, the arc-shaped outer wall and the plane outer wall of the small head end are sprayed in the two directions, two coatings are formed at the internal corner, and the combination degree of the coating and the pipe fitting is better.

The utility model is applicable to the technical field of engine parts, and provides a steel connecting rod, which comprises a connecting rod body and a connecting rod tile cover, the connecting rod body is detachably connected with the connecting rod tile cover, one end of the connecting rod body far away from the connecting rod tile cover is provided with a small end hole, and the other end of the connecting rod body is connected with the connecting rod tile cover to form a large end hole. A shaft sleeve is arranged in the small-end hole, a bearing bush is arranged in the large-end hole, and an oil throwing spoon is detachably installed on the connecting rod bush cover. The shaft sleeve and the bearing bush are respectively arranged at the small-end hole and the large-end hole of the connecting rod, so that the abrasion can be effectively reduced, the maintenance cost is reduced, the split type oil throwing spoon is simple and reliable to install, and the oil throwing spoon is detachably installed and fixed by using a stamping structural member, so that engine oil can be effectively lubricated, the strength of connecting rod parts damaged by welding is also avoided, and the service life of the connecting rod is prolonged. And the risk is greatly reduced.

The utility model relates to the technical field of drilling guiders, in particular to a drilling guider for a small-end hole of a connecting rod. The drilling device comprises a base, a stand column is fixedly connected to the upper surface of the base, a motor is fixedly connected to the interior of the stand column, a drill bit is fixedly connected to the output end of the motor, an electric wire is fixedly connected to the interior of the motor, the other end of the electric wire is fixedly connected with the stand column, and a guide device is arranged at one end of the stand column. The guiding device comprises a sliding groove, the sliding groove is formed in the stand column, a sliding block is slidably connected to the interior of the sliding groove, a guiding plate is fixedly connected to one end of the sliding block, an opening groove is formed in the guiding plate, and a sliding rod is slidably connected to the interior of the opening groove. The problems that when a drill floor is used for drilling a to-be-machined connecting rod, the to-be-machined connecting rod cannot move up and down, the drilling depth of the to-be-machined connecting rod is limited, the production quality is affected, and therefore the production efficiency of a traditional drill floor is reduced are solved.

The utility model discloses an assembly type steel structure pool self-tightening type side column node structure which comprises wallboard units, a steel column and a rubber sealing gasket, each wallboard unit comprises a wallboard surface and a wallboard side column, the steel column is correspondingly arranged between the two wallboard units, the cross section of the steel column is a trapezoid section with one large end and one small end, and the rubber sealing gasket is arranged between the wallboard surface and the wallboard side column. The small end of the wallboard side column is arranged on the upstream side close to the pool, the side, close to the steel column, of the wallboard side column is an inclined face matched with the side face of the steel column, a rubber sealing gasket is arranged between the wallboard side column and the steel column, and the wallboard side column, the rubber sealing gasket and the steel column are fixedly connected through high-strength bolts and achieve abutted seam sealing. And the wallboard units and the steel columns are compacted and reinforced under the action of water pressure in the water pool. The wall plate side column node is simple in structure and ingenious in design, the steel column and the wall plate side column section are optimally designed, the reinforcing and sealing effects can be achieved by means of water pressure in a water pool, and the problem of hidden danger of water seepage of the side column node is effectively solved.

The utility model discloses an asymmetric connecting rod and a mounting structure thereof, the asymmetric connecting rod comprises a rod body part, the rod body part is linear, two ends of the rod body part are provided with a large head part and a small head part, the middle part of the large head part is provided with a connecting rod large hole, and the middle part of the small head part is provided with a connecting rod small hole used for connecting a piston. The connecting line of the circle centers of the large connecting rod hole and the small connecting rod hole is parallel to the central axis of the rod body part, the horizontal distance between the connecting line and the central axis is not smaller than 1 mm, and a shaft sleeve used for being connected with a crankshaft is in interference fit with the interior of the large connecting rod hole; the utility model has the advantages of strong load capacity, good wear resistance and simple structure.

The invention relates to the technical field of automobile part processing equipment, discloses a small-head oil hole detection device for connecting rod production, and aims to solve the problem that a hole wall detection result of a small-head oil hole is affected due to the fact that a detection rod is affected by external impurities. Through the arrangement of the blocking mechanism, during use, the cylinder and the square cylinder are arranged on the two sides of the small-head oil hole, then the detection table extends into the small-head oil hole, the detection operation is completed by utilizing the axial contact between the detection rod on the detection table and the inner wall of the small-head oil hole, and in the process, the cylinder and the square cylinder are pressed on the two side faces of the small-head oil hole, so that the detection efficiency is improved. Through the actions, the amount of external impurities entering the small-head oil hole is reduced, so that the hole wall detection result of the small-head oil hole is not easily influenced.

The present application relates to the technical fields of one-way valve assembly, and discloses a valve body feeding mechanism for one-way valve assembly processing, which comprises a vibrating disc for conveying one-way valve bodies, one end of the one-way valve body being a large-head flange end and the other end being a small-head guide end, a clamping module being installed at the outlet of the vibrating disc, the clamping module having two output ends, after adopting a pre-pose optimization structure, the valve bodies can be corrected in pose and separated in advance, effectively reducing the workload of pose adjustment on the subsequent track, avoiding a large number of unqualified valve bodies from entering the subsequent process, at the same time, through the design of separation, the batch valve bodies are dispersedly conveyed, avoiding the delay of feeding caused by congestion, ensuring that the clamping module can continuously and stably obtain qualified valve bodies without waiting for replenishment, in addition, the valve bodies in vertical pose are selected in advance, greatly reducing the falling probability on the subsequent track, reducing repeated rework, improving the feeding efficiency, and laying a stable foundation for the subsequent assembly process of steel balls and springs.

The utility model provides a raking tooth machine chain link and steel bushing press mounting and dismounting tool which comprises a portable oil press, an oil press baffle and a raking tooth machine chain link fixing mechanism, the bottom of the portable oil press abuts against the oil press baffle, and the raking tooth machine chain link fixing mechanism is arranged at the front end of the portable oil press; the portable oil press comprises a steel sleeve dismounting device, and the steel sleeve dismounting device can dismount a steel sleeve from a raking tooth machine chain link or press the steel sleeve into the raking tooth machine chain link. The portable oil press structure is adopted, the steel sleeve in the raking tooth machine chain link can be mechanically taken out, manual replacement is avoided, time and labor are saved, the tool is simple in structure, convenient and fast to disassemble and assemble and convenient to carry, press-fitting and disassembly of the large-head steel sleeve and the small-head steel sleeve of the raking tooth machine chain link can be achieved at the same time, and the problem that the raking tooth machine chain steel sleeve is difficult to disassemble and assemble on a customer site is solved.

The present application relates to the field of water turbine processing technology, and discloses a kind of water pump upper crown inner ring and outer ring integral processing method, comprising the following steps: scribe line;Coarse lathe;Processing casting defects;4 process pressing plates are symmetrically welded on flow channel curved surface;Semi-finish lathe;Draw center cross line, draw each screw hole processing line;Finish lathe flow channel curved surface: clamp big head flange outer circle, dial gauge alignment has been processed inner circle, numerical control programming, semi-finish lathe, finish lathe small head end surface, flow channel curved surface, R fillet, step plane to drawing size, and according to drawing size position requirement, 0.20mm deep mark is engraved, and it is used for blade welding, and it is combined with crown flow channel template inspection;With processing inner hole as scribe line reference, draw impeller upper crown flow channel weld joint circle line;According to circle line, cut into upper crown inner ring and upper crown outer ring into two halves, so that the impeller upper crown flow channel processing size, form tolerance accuracy and roughness meet the requirements.

The utility model is suitable for the technical field of diesel engine parts, and provides a diesel engine connecting rod repair surfacing device which comprises a base, a welding assembly, a clamping assembly used for abutting against a connecting rod small end on a diesel engine connecting rod and a limiting assembly used for limiting a connecting rod large end on the diesel engine connecting rod. The clamping assembly comprises a mounting box, a chuck mounted on the mounting box and a guide part mounted at the axis of the chuck, a sliding groove is formed in the chuck, an abutting part is slidably arranged in the sliding groove, and the limiting assembly comprises a positioning part used for positioning the large end of the connecting rod and a limiting part arranged on one side of the positioning part. The limiting piece comprises a sliding rail and a limiting plate installed on the sliding rail in a sliding mode. The device solves the problems that the chuck is difficult to clamp the large head of the square diesel engine connecting rod and cannot ensure the positioning of the large head of the connecting rod, and achieves the effects of limiting and clamping the large head and the small head of the diesel engine connecting rod with different shapes and avoiding the influence of inaccurate positioning of the diesel engine connecting rod on the surfacing quality in the surfacing process.

The application discloses a posture adjusting device, relates to the field of adjusting devices, and comprises a transmission device and a mechanism.When a rotating shaft one drives a transmission belt to move and transport a to-be-tested connecting rod through the mechanism, a sensor detects a large head of the to-be-tested connecting rod, a rotating shaft two drives a baffle of the mechanism to be put down, then a gap between the baffles clamps a I-shaped rib of a body of the to-be-tested connecting rod, and a small head of the to-be-tested connecting rod is also limited in a certain range.When the to-be-tested connecting rod continues to pass, because the body of the to-be-tested connecting rod is clamped, the small head of the to-be-tested connecting rod moves to the middle, and the to-be-tested connecting rod with a skew posture is automatically adjusted to a flat posture.The posture skew problem of the to-be-tested connecting rod on a flow line is solved.

The application provides a reference-unified connecting rod machining process method. In the initial machining of the connecting rod, a process positioning hole is machined on the rod body and the rod cover end face, so that the process positioning hole penetrates the whole machining process of the connecting rod, the reference is unified from the front to the back of each process, the positioning error of each process is reduced, the machining precision of the part is improved, the positioning is accurate, convenient and fast, the positioning error is reduced, the machining precision is improved, the quality is guaranteed and the production efficiency is improved, the positioning reference is unified, the positioning error between each process is avoided, the precision requirement of the big head hole and the small head hole, the rod cover joint surface and the convex shoulder surface as the positioning reference is reduced, and the production cost is reduced.

The utility model relates to a connecting rod frame which is used for fixing a connecting rod, the connecting rod comprises a small end and a large end, the connecting rod frame comprises a main frame, and a lower limiting part and an upper limiting part which are arranged on the main frame; the lower limiting part abuts against the outer side wall of the small head end, and the upper limiting part abuts against the end face of the large head end so as to fix the connecting rod. The abutting position of the upper limiting part and the large head end is located above the side of the abutting position of the lower limiting part and the small head end, so that triangular support is formed between the connecting rod frame and the connecting rod, and the connecting rod fixing structure has the advantage that the connecting rod is stably fixed.

The utility model provides a cigarette packer strip package forming wheel dismounting tool for carrying out dismounting to strip package forming wheel end screw, and strip package forming wheel end has screw installation counterbore for screw head sinking, and the dismounting tool includes lengthened rod, force bar, lengthened rod includes lengthened rod body, and one end of lengthened rod body is equipped with the outer hexagonal head that is in line with the internal hexagon hole of screw head, and the other end of lengthened rod body is connected with the force bar perpendicular to lengthened rod body, and lengthened rod body is slidably sleeved with support ring, and support ring is step ring, and the small head end of support ring is towards the outer hexagonal head and is in line with the screw installation counterbore of strip package forming wheel end. The utility model has the advantages that compared with prior art: through support ring to lengthened rod whole course support, avoid strip package forming wheel to appear the situation of skidding when dismounting and installing, make the maintenance convenient and fast, save maintenance time.

The present application relates to the technical field of egg conveying, and discloses an egg conveying device, a plurality of egg-carrying assemblies; the plurality of egg-carrying assemblies are installed at intervals along a rotation direction between two chains; the egg-carrying assembly comprises two mounting blocks; the two mounting blocks are fixedly installed on corresponding chain links of the two chains respectively; the two mounting blocks are jointly rotationally connected with a mounting frame one and a mounting frame two; the mounting frame one and the mounting frame two are installed at intervals along the rotation direction of the chain; a plurality of pairs of egg claws are jointly installed on the mounting frame one and the mounting frame two; a pair of the two egg claws can be switched between a first state and a second state; in the first state, the pair of the two egg claws are arranged in a V shape pointing to the inner side of the rack, so that the surface-processed eggs fall between the two egg claws; in the second state, one end of the pair of the two egg claws pointing to the inner side of the rack is opened, forming a channel for the eggs to fall; the eggs can be adjusted from a horizontal posture to a vertical posture with the big head upward and the small head downward.

The utility model relates to the technical field of pipeline valves, and discloses a pipeline valve which comprises a valve body, a liquid inlet pipe is fixedly installed on one side of the valve body, and an irrigation pipe is detachably installed at the end, away from the valve body, of the liquid inlet pipe. According to the device, after the two fastening plates are fixedly connected to the outer portion of the irrigation pipe in a sleeving mode, the middles of the opening ends of the multiple installation holes and the middles of the multiple through holes are located on the same horizontal line, and then the small head ends of the fastening bolts are inserted into the installation holes till the small head ends of the fastening bolts penetrate through the through holes and extend to the position over the connecting ring; meanwhile, the large head end of the fastening bolt is attached to the bottom of the limiting block, then the fastening nut is connected with the small head end of the fastening bolt in a threaded fit mode, the attaching tightness degree of the top of the irrigation pipe and the bottom of the sealing ring is improved, and the situation that underground water leaks from the connecting position of the irrigation pipe and the sealing ring is prevented.

The utility model provides a symmetrical steel branch pipe spiral flow state elimination composite guide plate device, a spiral flow state elimination composite guide plate unit comprises four spiral flow state elimination composite guide plate subunits, and each spiral flow state elimination composite guide plate subunit comprises a composite guide plate and a plurality of parallel guide plates; the composite flow guide plate and the parallel flow guide plates are sequentially arranged in the direction from near to far away from the datum line; and moreover, the front ends of the composite flow guide plate and each parallel flow guide plate and the tail end of the crescent rib plate are kept on the same horizontal line vertical to the datum line. According to the device, the vortex eliminating effect of the guide plate in the pipe is utilized to cut the pressurized water flow in the incoming flow direction so as to eliminate vortexes in the pressurized water flow, so that the vortexes in the pressurized hydraulic pipeline are effectively eliminated or weakened on the basis of not changing the external structure of the branch pipe and not influencing the efficiency, and finally small head loss is contributed to the whole hydroelectric generation system; and the efficiency and the operation safety of the hydroelectric generation system are improved.

The utility model relates to the technical field of connecting rod press fitting, in particular to an assembling production line of a connecting rod press fitting assembly, which comprises a bushing press fitting machine, the surface of the bushing press fitting machine is provided with a limiting component for limiting a connecting rod, and the surface of the bushing press fitting machine is connected with a press fitting head driven by a hydraulic mechanism in a sliding manner. According to the connecting rod press-fitting assembly assembling production line, a press-fitting head descends, an abutting groove in the bottom is extruded above a small end of a connecting rod, at the moment, a lining is located over the connecting rod, then an air cylinder drives a pressing ring to move downwards, at the moment, air of an expansion air bag is released instantly, and the pressing ring rapidly pushes the expanded lining to the position above the connecting rod for press-fitting; and then the bushing quickly shrinks and is firmly pressed on the surface of the connecting rod under the deformation of the bushing, so that the connecting rod and the bushing can be effectively assembled, the assembly effect is good, the precision of a finished product is higher, and the bushing and the connecting rod cannot be damaged during pressing.

A kind of gauge for detecting connecting rod small head wedge bevel symmetry, for mechanical manufacturing field.The big base plate, small base plate is fixed on the two sides of base respectively, and the diamond pin that is adapted to the big head hole of connecting rod, the positioning mandrel that is adapted to the small head hole of connecting rod is fixed on the two sides of base, for fixing the anti-rotation pin direction of diamond pin is installed in base, and table block is placed in the side of connecting rod wedge bevel;The gauge further includes table frame and percentage indicating table;The inclination of the upper plane of base is consistent with the inclination of connecting rod wedge bevel.The utility model has the advantages of simple structure, easy to manufacture and detect and debug, and is convenient and fast for on-line detection of connecting rod wedge bevel symmetry, compared with the existing three-coordinate detection method, and its intuitive detection data is more convenient for cutter and fixture debugging during processing, quickly guides operator to adjust equipment, can effectively improve the detection efficiency of connecting rod wedge bevel symmetry, reduce the labor intensity of detection personnel, and reduce production cost.

The utility model discloses a high-strength crankshaft for a compressor, which relates to the field of compressors and comprises a crank, a spindle is arranged on one side of the crank, an insertion hole is formed in the center of one side of an inner cavity of the spindle, and an insertion column is arranged on one side of an inner cavity of the insertion hole. Through the elastic reset function of the fixing spring, the abutting column can be driven to move rightwards, when the abutting column moves rightwards, the clamping balls placed in the two arc-shaped containing grooves can be pushed into the arc-shaped clamping grooves from the two arc-shaped containing grooves and the through hole, and then the position of the small end of the crankshaft can be limited; therefore, the crankshaft small head and the crank can be firmly connected together in an anti-falling mode for use, the situation that connection of the crankshaft small head is not stable is avoided, the connection firmness of the crankshaft small head and the crank is improved to a certain degree, the crankshaft small head can be better matched with the crank for use, and the service life of the crankshaft small head is prolonged. And actual use is facilitated.

The invention relates to the field of egg tray loading, in particular to an egg tray loading method which comprises the following steps: S1, carrying and conveying eggs through a U-turn conveying belt; when the egg products are placed on the turning conveyor belt, the egg products are in a transverse state; s2, enabling the egg products to fall off from the tail end of the turning conveyor belt, enabling small heads of the egg products to collide with a static egg product turning piece when the small heads of the egg products fall off, and enabling the egg products to be converted into a first vertical state from a transverse state in the falling process; s3, receiving the eggs in the first vertical state through a transfer conveying belt and a transfer egg cup; the height difference h1 between the transfer egg cup and the top of the turning conveyor belt is 3-5cm when the transfer egg cup receives eggs; s4, enabling the egg product to revolve in a vertical plane until the egg product is converted into a second vertical state from the first vertical state; and the height difference h2 between the tail end of the turning arc plate and the egg support is 2cm to 5cm. The egg tray loading device has the effect that the situation that eggs are damaged in the tray loading process is reduced.

The present invention discloses a circular centering device and its process for automotive precision metal parts in the field of automotive metal part processing, including a workbench and a pressing device. At the top of the workbench, there are two clamping plates and a feeding plate. At the top of the feeding plate, there is a feeding mechanism, which is used to convey the small end of the connecting rod into the piston and keep it at the center position between the two clamping plates. At the top of the workbench, four positioning blocks are arranged through a limiting mechanism. The four positioning blocks are spliced into a whole and correspond to the piston pin in the middle of the pressing device. The limiting mechanism is used to limit the positioning blocks to always remain in a vertical state. At the upper side of the positioning blocks, four guiding plates are arranged through an adjusting mechanism. The adjusting mechanism is used to drive the four guiding plates to move upward when the small end of the connecting rod moves into the piston until the tops of the guiding plates are inserted into the holes of the small end of the connecting rod, solving the problem that the existing circular centering device for automotive precision metal parts is difficult to center the piston, connecting rod and piston pin.

The utility model discloses an elastic clamping piece for a telescopic cladding keel, which relates to the technical field of light steel keels and comprises an elastic clamping piece body, and the elastic clamping piece body comprises an elastic ring, a holding part and two clamping hooks. The two clamping hooks are arranged on the two sides of the elastic ring and are of a U-shaped structure. The holding part is located between the elastic ring and the clamping hook and connected with the elastic ring and the clamping hook. Wherein the elastic clamping piece body is integrally formed, the telescopic cladding keel comprises a large cladding keel head and a small cladding keel head, one clamping hook is used for clamping a telescopic hole of the large cladding keel head and a telescopic hole of the small cladding keel head, and the other clamping hook is used for clamping a telescopic hole of the small cladding keel head and the wall face of the large cladding keel head. Therefore, the telescopic covering keel is fixed. The elastic clamping piece for the telescopic cladding keel is convenient to operate, the clamping hooks firmly fix the telescopic cladding keel, the telescopic cladding keel can be effectively prevented from sliding, the elastic clamping piece can be repeatedly used, and the construction cost is reduced.

The utility model relates to the technical field of neckties, and provides a necktie with a limiting coil, which comprises a necktie body, two ends of the necktie body are respectively a small end and a large end, and the back of the necktie body is provided with a center stitch; at least two vertical coils and at least two transverse coils are sequentially arranged in the direction from the small end to the large end, and the vertical coils and the transverse coils are distributed in the length direction of the tie body at intervals. One end of the middle sewing line is sewed at the big end, and the other end is a free end; the free end extends from the big end to the small end, and the free end turns back towards the big end between the vertical coil and the transverse coil and penetrates through at least one transverse coil. According to the tie, the technical problems that a sewing thread in an existing tie is insufficient in limiting capacity for fabric, lining cloth and lining cloth, torsional deformation, lining cloth displacement and other quality problems are prone to occurring, and the middle sewing thread is prone to being broken or exposed can be solved.

The invention discloses a commercial vehicle connecting rod small flash forging process, and relates to the field of automobile part manufacturing. The round bar material is subjected to deformation and extension in the axial direction through five-pass rolling of a roll forging die, so that the cross section shapes of the round bar material corresponding to a rod body of the connecting rod, the connecting position of the rod body and the large head and the connecting position of the rod body and the small head are sequentially changed from ellipse to circle to ellipse to circle to circle, and a forging stock is obtained; the forging stock is flattened through a flattening die to obtain a flattened piece, the height of the flattened piece is 2-5 mm larger than that of the pre-forged piece, the width of the flattened piece is 1-2 mm smaller than that of the pre-forged piece, the sectional area of each position of the flattened piece is larger than that of the pre-forged piece, and the fillet of each position of the flattened piece is one level larger than that of the pre-forged piece; and a pre-forging and finish-forging process: performing pre-forging and finish-forging treatment on the flattened part to obtain a pre-forged part and a finish-forged part in sequence. The problems of low material utilization rate and short service life of the die are solved by reducing the flash volume and the material consumption.

The embodiment of the invention provides an aerostat, an aerostat air operation control system and a wind power generation device, and the aerostat comprises an aerostat body which is in a streamline design, and the two ends of the aerostat body form a large head end and a small head end respectively; the steering part is arranged below the floating body, and the floating body can rotate around the steering part along with the change of the wind direction; the lifting force adjusting part is arranged above the floating body, the position of the lifting force adjusting part changes along with the change of the wind direction, and the lifting force adjusting part always has upward pulling force on the floating body. The lifting force adjusting part can adjust the pulling force on the floating body in real time according to the change of the wind force and direction, so that the floating body is always kept at a stable height and posture, meanwhile, the steering part enables the floating body to flexibly cope with the change of the wind direction, and the floating body is prevented from shaking or inclining due to the sudden change of the wind direction.

The utility model discloses a shutter structure of a negative pressure fan, which relates to the technical field of negative pressure fans, aims to solve the technical problem that blades of a current shutter are easy to shake, and comprises a negative pressure fan main body and a shutter main body. By designing the flow stabilizing structure, when the negative pressure fan main body is used, airflow exhausted by the negative pressure fan main body can pass through the trumpet-shaped flow guide cover of the flow guide structure, enters the large end from the small end and is exhausted, and in the process, the airflow can smoothly transit along the curved surface of the trumpet-shaped flow guide cover and uniformly flow to the blades of the shutter main body; therefore, the irregular acting force of airflow on the blades of the shutter body is reduced, a person can correspondingly adjust the angle of the trumpet-shaped flow guide cover through the adjusting structure according to the inclination of the blades of the shutter body, and therefore the airflow can be discharged more smoothly in the opening direction of the blades of the shutter body. And the irregular acting force of the airflow on the blades of the shutter main body is further reduced.

The utility model discloses a winding tool small end socket shell plate machining auxiliary device, and relates to the technical field of small end socket shell plate machining auxiliary devices. The winding tool small end socket shell plate machining auxiliary device comprises an annular support A, an annular support B is arranged on the upper end face of the annular support A, and an annular support C is arranged above the annular support B; a plurality of evenly-arranged rib plates are connected between the annular support B and the annular support C. A plurality of evenly-arranged positioning pin holes B are formed in the surface of the annular support C. A plurality of evenly-arranged threaded through holes are formed in the surface of the annular support A. The small end socket shell plate machining auxiliary device is easy to operate and high in efficiency, labor intensity and labor cost are saved, and machining precision is improved.