492 results about "Needle roller bearing" patented technology

A moving part of the short flexible cylinder active complex parallel radial harmonic transmission is composed of a thin-wall composite short flexible cylinder and two rolling wave generators with roller pins or ball-retainer assemblies. A flexible bearing low-speed moving ring raceway is integrated on one side of the gear, and a full-cylinder-length gear is arranged on the other side of the gear; the two semi-short shafts are fixedly connected to the two ends of a motor rotor respectively, are integrated with flexible bearing high-speed moving ring raceways and are the same in structure size, and a semi-short shaft at one end needs to be coplanar with a semi-long shaft at the other end, so that the two ends of the semi-short shafts generate time-varying radial antisymmetric deformation; the static part is composed of end covers which are fixedly connected to the two ends of the motor stator and provided with rigid gears. A double-convex-arc raceway of a high-speed moving ring of the flexible needle bearing is designed, a convexity needle roller with the middle concave structure dynamically constraining the axial movement amount of a short flexible cylinder and a retainer and various structures facilitating rolling body assembly are used, and a waveform raceway calculation formula of a wave generator for the needle roller is given; therefore, the radial size and the axial size of the active complex radial harmonic transmission can be reduced on the basis of ensuring the transmission precision and the bearing capacity.

The invention provides a mid-motor driving system and an electric moped. The mid-motor driving system comprises a torque sensor assembly, an output shaft assembly, a magnetic group assembly, a motor and a controller. Motor gear shafts of the motors are connected with the output shaft assemblies in a pairwise meshed mode through duplicate gears, and speed reduction is carried out on the sides of the output shaft assemblies; the output shaft assembly comprises a large gear, a one-way needle bearing, an output shaft, a third bearing, a ratchet wheel, a pawl, a ratchet ring and a tensioning piece. The torque sensor assembly is used for detecting the torque of the center shaft, the magnetic group assembly is used for detecting the rotating speed of a gear shaft of the motor, and the controller controls the torque and the rotating speed output by the motor according to the detected torque and the rotating speed. Two-stage speed reduction is adopted, and the high rotating speed of the motor rotor is converted into stable large-torque low-rotating-speed output of the output shaft. The duplicate gear is fixed through cooperation of the machine shell partition plate and the machine shell, so that the overall structure is more compact.

The invention relates to the technical field of cross shafts, and discloses an efficient lubricating needle bearing cross shaft which comprises a cross center part, a first oil injection assembly is arranged on the cross center part, a second oil injection assembly is arranged in the cross center part, and the first oil injection assembly comprises an oil injection nozzle. A first oil cavity is formed in the cross-shaped center part, and a first oil injection groove is formed in the cross-shaped center part. According to the efficient lubricating needle bearing cross shaft, a grease gun is used, an oil outlet of the grease gun is tightly pressed on an oil injection nozzle, it is ensured that lubricating oil enters a first oil cavity through the oil injection nozzle under the pressure effect, and a first sealing plate and a first spring move downwards to the position below a communicating hole channel under the pressure effect; and meanwhile, after the second oil cavity is filled with the lubricating oil, the first oil cavity is slowly filled with the lubricating oil, the lubricating oil flows out of the first oil injection groove, and primary oil injection can be achieved.

The invention discloses a rotary joint actuator and a design method thereof.The rotary joint actuator comprises a fixed shell, the fixed shell comprises a front cover and a rear cover, and a frameless motor and a cam curved surface tooth planetary reducer are both arranged in a mounting cavity reserved between the front cover and the rear cover; the driving device is connected with the frameless motor; the driving device comprises a driving plate, the encoder is fixed on the driving plate, the driving plate is fixed inside a driving cover plate, and the driving cover plate is fixed outside the rear cover; the cam curved surface tooth planetary reducer comprises an input bearing, a planetary needle bearing, a planetary carrier set and a planetary gear set. The planetary gear set comprises a sun gear, a curved surface tooth planet gear and a gear ring which is in conjugate engagement with the curved surface tooth planet gear. The invention discloses a rotary joint actuator and a design method thereof, and the rotary joint actuator is compact in structure and has the characteristics of large transmission ratio, high transmission precision and good stability under the condition of size control.

The utility model relates to a center shaft torque sensor with a limiting function, and belongs to the field of power-assisted bicycles. The device comprises a middle shaft, a left bearing seat, a bearing, a protective sleeve, a right five-way seat, an elastic body, a needle bearing and a strain gauge, the two ends of the protective sleeve are connected with the left bearing seat and the right five-way seat respectively, the bearing is installed between the left bearing seat and the middle shaft, the needle bearing is installed between the elastic body and the middle shaft, and the strain gauge is installed between the elastic body and the middle shaft. The elastic body is located in the right five-way seat, the strain gauge is pasted on the elastic body, two ends of the elastic body are respectively a fixed end and a free end, and the elastic body is structurally characterized in that the fixed end of the elastic body is fixed with the right five-way seat, the free end of the elastic body is provided with a limiting convex rib, and the limiting convex rib and the elastic body are of an integrated structure.

The utility model provides a cloth feeding mechanism of a hemming sewing machine, and belongs to the technical field of sewing machines. The edge covering sewing machine solves the technical problems that when an existing edge covering sewing machine covers edges, indentations are generated, and cloth feeding is not stable. According to the cloth feeding mechanism of the hemming sewing machine, an upper rotating shaft and an upper walking wheel are connected through an upper one-way needle bearing, a lower rotating shaft and a lower walking wheel are connected through a lower one-way needle bearing, the lower end of an upper crank can slide in a reciprocating mode along a long-strip-shaped hole of the upper crank, and a presser foot is fixedly connected to the front side face of an upper support. The upper end of the upper support is fixedly connected with an adjusting rod capable of adjusting the height of the upper support. The upper one-way needle bearing and the lower one-way needle bearing are arranged, so that wrinkles or creases of fabrics due to different linear speeds of the upper walking wheel and the lower walking wheel are avoided; the adjusting rod, the adjusting nut and the upper support are matched to adaptively adjust the gap between the upper walking wheel and the lower walking wheel, the fabric does not generate indentations at the edge covering position, and the attractiveness of an edge-covered product is improved.

The invention relates to the technical field of gearbox gear shifting, in particular to a meshing sleeve gear shifting structure of an AMT gearbox of an electric loader. An input shaft is sequentially provided with an oil groove I and an oil groove II, a small lubricating hole I is formed in the direction extending from the oil groove I to a first-gear driving gear, and a small lubricating hole II is formed in the direction extending from the oil groove II to a second-gear driving gear; the first-gear driving gear is installed on the input shaft through a needle bearing I. An outer spacer bush and an inner spacer bush are arranged on the two sides of the needle bearing I respectively. The second-gear driving gear is mounted on the input shaft through a needle bearing II; the two ends of the meshing sleeve are meshed with the outer splines through the inner splines respectively. The structure of the input shaft is improved, the oil groove and the small lubricating holes are formed in the input shaft, the gears on the input shaft are lubricated, and meanwhile heat and impurities are cleared away; the sleeves are reasonably meshed, so that the gears are smoothly shifted with the adjacent gears, and the gear shifting smoothness is improved; and the gears are supported by the needle bearings respectively, so that the whole structure is compact and small.

The structure comprises a first oil collecting box and a second oil collecting box which are arranged on the two sides of a double planet row, a first notch is formed in the surface of the first oil collecting box, and a second notch is formed in the surface of the second oil collecting box; a first oil guide hole is formed in the bottom surface of the first oil collecting box, one end of the first oil guide hole communicates with the interior of the first oil collecting box, and the other end extends into the needle bearing on one side; a second oil guide hole is formed in the bottom surface of the second oil collecting box, one end of the second oil guide hole is communicated with the interior of the second oil collecting box, and the other end extends into the needle bearing on the other side; the second oil collecting box and the planetary gear differential are located on the same side of the double-planet row, and an oil stirring mechanism is arranged on the outer surface of the second oil collecting box; oil enters the oil collecting box from the first notch or the second notch, and the oil in the oil collecting box enters the planetary gear shaft and then enters the needle bearing through a hole in the planetary gear shaft; and the oil stirring mechanism on the second oil collecting box throws oil in the oil pan into the differential mechanism to provide lubrication for the differential mechanism.

The high-precision grinding machining method for the needle bearing comprises the steps that S1, a needle bearing ring to be ground is placed on a mounting table of a three-dimensional fine adjustment mechanism through a mechanical arm, a ring clamp is started to conduct rigid positioning on the needle bearing ring, and a tool setting gauge scans the needle bearing ring; s2, the numerical control bearing grinding machine drives a grinding wheel to machine and grind the inner ring of the needle bearing ring, a temperature detection module detects the temperature change, and a visual detection module scans the inner diameter data of the needle bearing ring in real time; and S3, the grinding wheel is dynamically adjusted according to the grinding wheel feeding correction control instruction obtained through scanning of the visual detection module, and the feeding rate is finely adjusted. The inner diameter data of the ferrule is scanned in real time through the visual detection module, grinding thermal deformation is monitored in real time in combination with the temperature detection module, a whole-process closed loop of detection-analysis-correction of machining errors is achieved, 10-30 min delay of traditional off-line detection is shortened to millisecond response, and the purpose of high-precision machining is achieved.

The invention relates to the technical field of needling machine equipment, in particular to a needling device suitable for a special-shaped composite material preform, which comprises a mounting seat, a speed reducing motor is connected to the mounting seat, the output end of the speed reducing motor is connected with a rotating shaft, the rotating shaft is connected with an eccentric through hole of an eccentric wheel, and the eccentric wheel is rotatably connected in a cylindrical needle bearing; the cylindrical needle bearing is inserted into a second through hole in the end of the push plate, the push plate is in sliding fit with the mounting base, the other end of the push plate is connected with the quick-change needle row, the other end of the quick-change needle row faces the tool, the bottom of the mounting base is connected with the horizontal moving part, and the quick-change needle row is adjusted to face the normal direction of a prefabricated body and conducts needling on the prefabricated body. The surface of the R-angle prefabricated body and the surface of the conical prefabricated body can be needled, and then the purpose of tight combination of fibers in the prefabricated body is achieved.

The three-phase cycloidal planetary reducer comprises eccentric shaft assemblies, cycloidal gears, a planet carrier and a pin wheel housing, the eccentric shaft assemblies are arranged in the circumferential direction of the planet carrier at intervals of 120 degrees, and each eccentric shaft assembly comprises an eccentric shaft, a falling-off type needle bearing and a second needle bearing. The eccentric shaft is provided with three sections of eccentric parts with the same eccentricity, the eccentric directions of the eccentric parts are distributed at intervals of 120 degrees, the eccentric part located in the middle is provided with a falling-off type needle bearing, and the eccentric parts located on the two sides are provided with second needle bearings; one end of the eccentric shaft is connected with a planetary gear through a spline; the eccentric shaft is connected with the planet carrier through a bearing; the cycloidal gear is in transmission connection with the eccentric shaft through a falling-off needle bearing or a second needle bearing at the corresponding position; the planet carrier is connected with the pin wheel housing through a main bearing; a roller pin is installed on the inner side of the pin wheel housing, and the cycloidal gear is meshed with the roller pin. The transmission mechanism has the advantages of being good in integrity, small in transmission error and convenient to assemble.

The speed reducer gear shifting shaft structure comprises a gear shifting shaft, a gear shifting gear, a needle roller thrust bearing, a pre-tightening assembly, a sliding sleeve and a gear shifting fork, the gear shifting gear, the sliding sleeve and the pre-tightening assembly are arranged on the gear shifting shaft, the gear shifting gear is arranged on the gear shifting shaft through the needle roller thrust bearing, and the pre-tightening assembly is arranged on the gear shifting shaft through the sliding sleeve. The pre-tightening assemblies make contact with the gear shifting gears correspondingly, and thrust of the gear shifting gears is pre-tightened through the pre-tightening assemblies. Sliding friction of the end face of the gear shifting gear is converted into rolling friction through the needle roller thrust bearing, and end face abrasion is greatly reduced. And due to the constant pre-tightening force, early failure caused by too tight or too loose bearings is avoided, the reliability of the speed reducer is remarkably improved, and the service life of the speed reducer is remarkably prolonged.

The utility model relates to a needle bearing oiling device which is provided with a machine frame, guide strips are fixed on a platen face of the machine frame at intervals, a material channel with two open ends is formed in the space between the guide strips, a needle bearing to be filled with grease moves along the material channel, an oiling rod capable of doing lifting motion is arranged above the material channel, and the oiling rod is connected with the machine frame. The oil injection rod is provided with an axial cavity for storing lubricating grease, and oil injection holes for injecting the lubricating grease into the inner ring of the needle bearing are evenly formed in the bottom of the oil injection rod in the circumferential direction. According to the needle bearing oiling device, the needle bearings are arranged in the material channel and move to the oiling position along the material channel, the oiling rod capable of doing lifting motion descends to be inserted into the needle bearings, lubricating grease is injected into inner holes of the needle bearings through the oiling holes, and therefore automatic operation of needle bearing oiling is achieved, and working efficiency is improved.

The invention relates to the technical field of punching outer ring needle roller bearing processing, in particular to a punching outer ring needle roller bearing one-time needle mounting detection machine which comprises a rack, a retainer feeding mechanism, a needle mounting workbench, a needle mounting mechanism, a transfer mechanism, a punching outer ring feeding mechanism, a punching outer ring assembling workbench and a discharging mechanism, and the retainer feeding mechanism, the needle mounting workbench, the needle mounting mechanism, the transfer mechanism, the punching outer ring feeding mechanism, the punching outer ring assembling workbench and the discharging mechanism are arranged on the rack. The needle mounting workbench comprises a rotating disc, a rotating disc driving assembly for driving the rotating disc to rotate and a plurality of rotating edge searching type jacking tools which are arranged on the rotating disc and can achieve positioning of the holder. According to the one-time needle mounting detector for the punched outer ring needle roller bearing, the specially designed rotary edge searching type jacking tool is matched with all the mechanisms, the assembly efficiency of the punched outer ring needle roller bearing is greatly improved, meanwhile, in the assembly process, the needle roller can be prevented from being disengaged from the interior of the retainer, the yield is greatly improved, and therefore the product quality is guaranteed, and the production cost is reduced. And the production cost is reduced.

The utility model provides a numerical control cutter handle device capable of pressurizing, and relates to the technical field of numerical control machining. The face milling cutter comprises a face milling cutter main handle, a cylindrical pin, a valve plate, a first hexagon socket head cap screw, a first O-shaped sealing ring, a plunger, a stamping outer ring needle bearing, a key, a second hexagon socket head cap screw, a round nut, an orientation disc, a belleville spring, a kinetic energy disc, a split elastic pin, a cylinder body, a second cylindrical helical compression spring, an orientation seat, a second O-shaped sealing ring, an orientation rod, a blind rivet and a stainless steel ball. The face milling cutter main handle is installed on the main shaft and transmits kinetic energy to the kinetic energy disc at a preset rotating speed, the kinetic energy disc drives the 11 plungers in the cylinder body to alternately reciprocate up and down in sequence through the curved surface, and then water absorption and drainage are achieved. According to the numerical control cutter handle, the supercharging device is designed in the numerical control cutter handle, so that secondary supercharging of cutting fluid is realized, the pressure of the cutting fluid when the cutting fluid washes the cutter is improved, and the cooling effect and the capacity of cleaning accumulated cuttings are effectively improved.

The invention belongs to the field of uncontained bearing load calculation, and discloses a load calculation method for a civil aircraft flap needle roller bearing. On the basis of the Hertz contact theory, a bearing outer ring is regarded as a flexible outer ring, the influence of bending elastic deformation of the bearing outer ring under an external load on load distribution is considered, a comprehensive deformation calculation formula between a roller pin and a roller path is established, then the roller pin is subjected to slicing discretization treatment along the axis of the needle roller bearing, and according to the obtained deformation, the bearing outer ring is subjected to deformation calculation; the contact load generated between the slice unit and the inner and outer raceways is calculated, then a static equation set of the flap needle bearing is established, the deformation amount of each position of the needle bearing is solved through a Levenberg-Marquardt algorithm, and the load distribution of the needle bearing can be calculated. On the basis, a relational expression among the maximum contact stress, the load and the displacement is established, and the maximum contact stress distribution of the needle bearing is obtained through a numerical iteration method.

The invention discloses a needle bearing surface strengthening treatment method, which relates to the field of needle bearings, and comprises the following steps: S1, a pretreatment stage; s2, surface strengthening core process: selecting a heavy-load working condition strengthening route or a precise / thin-wall bearing strengthening route according to the service working condition of the needle bearing; and S3, a post-treatment finishing stage. According to the method, multiple technologies such as heat treatment (carburizing and quenching and gas nitriding), mechanical strengthening (shot blasting) and surface coating (PVD-TiN and DLC) are systematically combined, and a multi-dimensional strengthening system is formed. All the processes cooperate with one another, so that the surface of the bearing has high hardness, fatigue resistance, low friction and corrosion resistance at the same time, the performance limitation of a single process is broken through, the comprehensive performance of the needle bearing is remarkably improved, meanwhile, a targeted strengthening scheme is customized according to different service conditions of the needle bearing, and the service life of the needle bearing is prolonged. And the high-performance requirements of the needle bearing under different working conditions are met.

The utility model relates to a double-saw-blade cutting machine for preparing a shaped refractory product sample. The double-saw-blade cutting machine comprises a saw blade, a saw blade transmission system, a spraying device, a sample carrying table and a track, the device further comprises a rack, a water collecting tank and a multi-sample clamp; the saw blade adopts a diamond saw blade, a needle bearing group is arranged between the saw blade transmission shaft and the bearing seat, and the track adopts a linear slide rail; the multi-sample clamp is provided with a V-shaped seat and a pressing plate, a sample is arranged in a V-shaped groove in the top of the V-shaped seat, and the top of the sample is fixed through the pressing plate. The problems that a guide rail of a refractory material cutting machine is prone to corrosion, stability is poor during saw blade cutting, cutting efficiency is low and the like are solved, a saw blade transmission shaft adopts a needle bearing, the radial size is small, load is high, movement is stable, the service life is long, a cutting machine track adopts a linear sliding rail, precision is high, corrosion is not prone to occurring, and maintenance is convenient; by adopting the multi-sample clamp, a plurality of samples can be fixed at multiple angles at one time, the operation is simple, and the sample preparation efficiency is greatly improved.

The utility model relates to bearing installation technical field, concretely is a kind of needle bearing mounting device, including installation device main body, the bottom four corners of installation device main body are evenly provided with support chassis, the front side of installation device main body is provided with temperature control screen, the top side of installation device main body is symmetrically provided with first mounting bracket and second mounting bracket, the top end swing joint of first mounting bracket has bearing heating rod, the top of second mounting bracket is provided with fixed rod, the position of fixed rod is opened with the limit slot of corresponding size in the bottom of the end of bearing heating rod far from first mounting bracket, temperature control screen and bearing heating rod electric connection, the inside of oil storage cavity is guided into the inside of oil outlet spray head by hose by hydraulic pump, the inside of oil outlet spray head is injected into bearing seat and installation shaft gap by butter, the inside of bearing is lubricated by butter, improve the service life of needle bearing also facilitate better installation to needle bearing.

The application discloses a silicon steel sheet laminating and pressing equipment based on self-control pressure and relates to the technical field of silicon steel sheet manufacturing equipment. The equipment comprises a C-shaped frame, a pressure conduction block and a double-acting hydraulic cylinder. A cross-shaped oil guide groove is milled at the bottom end of the outer wall of the pressure conduction block. Two rows of needle roller bearings are symmetrically installed on the side surface of the outer wall of the pressure conduction block. A laminating pressing plate is fixedly installed at the bottom end of the outer wall of the pressure conduction block. An annular oil cavity is formed at the top end of the outer wall of the laminating pressing plate. The annular oil cavity is communicated with the oil guide groove. A pressure sensing film is fixedly installed at the bottom end of the outer wall of the laminating pressing plate. A strain grid is etched at the rear end of the outer wall of the pressure sensing film. The strain grid etched at the pressure sensing film can sense the pressing pressure, the real-time detection and automatic closed-loop adjustment of the pressing pressure are realized, the problem that the pressure fluctuation of the pressing equipment is large and the laminates are deformed due to overpressure or loose due to insufficient pressure caused by the adjustment depending on manual experience is solved, and the compactness, flatness and core performance consistency of the laminates are improved.

The application provides a special tool for a flat top center, which can guarantee the positioning accuracy and stability of the top center and ensure the machining accuracy of the blade. The tool comprises a top center shaft, which is installed in a top center seat, the top center seat is installed in a mounting cavity of a machine tool slide cylinder, and the top center seat and the top center shaft are connected by screws, the shape of the mounting cavity of the machine tool slide cylinder is matched with the shape of the top center seat; the top center shaft comprises a shaft body and a top head, the top surface of the top head is a flat surface, and the top surface of the top head is fixedly installed with a tooth surface pressing block; the shaft body comprises three cylindrical sections with decreasing radii from top to bottom, namely a first cylindrical section, a second cylindrical section and a third cylindrical section, the outer part of the joint between the third cylindrical section and the top center seat is successively sleeved with a thrust ball bearing and a needle bearing from top to bottom; the outer part of the joint between the second cylindrical section and the top center seat is successively sleeved with a pair of angular contact ball bearings from top to bottom, the upper end surface of the outer ring of the upper angular contact ball bearing is press-fitted with an end cover, the end cover is sleeved on the outer part of the first cylindrical section, and a first sealing ring is arranged at the joint between the end cover and the first cylindrical section.

Provided is a shell type needle roller bearing having rocking durability. In this shell type needle roller bearing (10), a shell-shaped outer ring (1) is made from an austenitic stainless steel material, and the average crystal grain size in a region up to 0.135 mm from a surface of a raceway surface (1d) of the shell-shaped outer ring (1) is 22 μm or less .

The plunger assembly comprises a plunger, a spring pin and the needle roller bearing, the needle roller bearing comprises an outer ring and a needle roller, a shaft core is arranged in the center of the needle roller bearing, the needle roller is arranged between the shaft core and the outer ring, fixing grooves are formed in the two sides of the plunger, and the spring pin is arranged in the fixing grooves. The two sides of the shaft core are inserted into the fixing grooves, a spring pin is further arranged at one end of the shaft core, a needle bearing cavity for the needle bearing to be installed is formed in the plunger, when the needle bearing rotates at a high speed, a liquid dynamic pressure oil film is formed between the needle bearing and the needle bearing cavity, and the liquid dynamic pressure oil film provides supporting force for the needle bearing. The shaft core and the liquid dynamic pressure oil film jointly support the downward pressure of the needle bearing, and the needle bearing is characterized in that the liquid dynamic pressure oil film can provide supporting force, the liquid dynamic pressure oil film and the shaft core jointly bear the downward pressure of the needle bearing, frictional resistance is reduced, mechanical efficiency is improved, part abrasion is reduced, and meanwhile the supporting stability of the needle bearing is enhanced.

The invention relates to the technical field of automobile accessories, and discloses a high-supporting-performance separated steering intermediate shaft sheath which comprises an upper metal plate, a lower metal plate, a rubber pad and a needle bearing, the rubber pad penetrates through a hole of the lower metal plate through a rubber staple bolt structure to be clamped on the upper metal plate, and the needle bearing is assembled in a rubber ball head in an interference mode. The needle roller bearing comprises an elastic outer ring, a retainer, a needle roller and second lubricating grease, a bearing cover plate is fully coated with the grease and placed into a bearing ring, the bearing cover plate and the other bearing cover plate are connected in a clamped mode and installed in a rubber ball head in an interference fit mode, and the rubber ball head is in interference fit with an upper metal plate and a lower metal plate. According to the separated steering intermediate shaft sheath assembly, the metal plate is fixed to the automobile dash panel, the rubber pad is sealed with the dash panel, the needle bearing and the bearing ring are in interference fit with the automobile intermediate shaft, the rotating function of the intermediate shaft is achieved, and the steering intermediate shaft sheath with the high supporting performance has the advantages of being easy to assemble, economical, practical, dustproof, waterproof, high in supporting performance and the like. The rotation is smooth; and the supporting performance on the intermediate shaft is high.

The invention discloses an automatic assembly process of an assembled crankshaft. The process comprises the following steps: cleaning and drying a left half shaft, a right half shaft, a crank pin and a connecting rod; the connecting rod, the crank pin and the needle bearing are conveyed to a connecting rod assembly assembling station after being selected and matched, and connecting rod assembly assembling is conducted; the left half shaft is conveyed to a discharging position, and the right half shaft is conveyed to a woodruff key press-fitting station for woodruff key press-fitting and then conveyed to the discharging position; the left half shaft, the right half shaft and the connecting rod assembly are conveyed to a crank pin press-fitting station, crank pin press-fitting is conducted, and an assembled crankshaft is formed; the assembled crankshaft and the oil cover are conveyed to an oil cover press-fitting station, and oil cover press-fitting is conducted; the assembled crankshaft and the bearing are conveyed to a bearing press-fitting station for bearing press-fitting; the assembled crankshaft and the chain wheel are conveyed to a chain wheel press-fitting station, and chain wheel press-fitting and detection are conducted; the assembled crankshaft gear is conveyed to a gear press-fitting station to be subjected to gear press-fitting; the assembled crankshaft is detected after being straightened; and if the assembly type crankshaft is qualified, soaking the assembly type crankshaft with oil and then conveying the assembly type crankshaft to a storage frame, otherwise, conveying the assembly type crankshaft out of a production line.

The present invention discloses an automatic assembly machine for a planar needle roller bearing, which includes a base and a multi-station turntable arranged on the base and driven by a driving mechanism. On the base outside the multi-station turntable, there are successively arranged a first automatic feeding mechanism for loading the seat ring, a first installation mechanism for installing the cage on the seat ring, a first automatic feeding mechanism for loading the shaft ring, a second installation mechanism for installing the shaft ring on the seat ring, and a blanking mechanism. On one side of the first installation mechanism, there is a second automatic feeding mechanism for loading the cage. The present invention uses the multi-station turntable, the first automatic feeding mechanism, the first installation mechanism, the second automatic feeding mechanism, the second installation mechanism and the blanking mechanism in cooperation to achieve automatic assembly, eliminating manual feeding and assembly, improving work efficiency and ensuring product consistency.

The invention discloses a high-precision double-row needle roller bearing with a plastic sleeve self-falling function, and relates to the technical field of bearings, the needle roller bearing comprises a neck bush, needle rollers, a check ring, a snap spring, a fixing unit and a plastic sleeve, the plastic sleeve prevents the needle rollers from displacing and prevents external impurities from invading between the needle rollers to pollute and damage the needle rollers, and the needle rollers are prevented from being damaged by the plastic sleeve. The fixing unit is responsible for positioning and fixing the snap spring and the plastic sleeve, and in the needle bearing installation process, before the snap spring reaches a designated position, the snap spring is fixed all the time, and the snap spring is prevented from being opened and scratching the inner wall of the gear. Meanwhile, in the installation process, along with stress movement of the fixing unit, the plastic sleeve gradually and automatically falls off, and manual removal is not needed.

The utility model relates to the technical field of textile machinery, in particular to a swing arm joint connecting assembly of a high-speed warp knitting machine. Comprising a bearing outer sleeve, a plurality of roller pins arranged in an inner cavity of the bearing outer sleeve, a steel sleeve and a connecting pin shaft fixedly connected with the steel sleeve, a cavity of the bearing outer sleeve comprises oil storage areas on the two sides, and the outer wall of the bearing outer sleeve is provided with an oil injection hole communicated with a needle roller area, so that the problems that grease leaks outwards, foreign matter permeates into a needle roller bearing and the like in traditional swing arm connection rotation are solved, the service life of the swing arm joint connecting piece of a machine is effectively prolonged, and the service life of the machine is prolonged. And meanwhile, maintenance is convenient, the operation stability of the machine can be ensured, greasy dirt permeating to grey cloth is reduced, and the effect of saving cost can be achieved.

The utility model relates to the technical field of metal plates, and discloses a servo rivet tool with tension measurement, which comprises a machine core front seat, a machine core rear seat and a mounting base, a gun head mounting plate is fixedly mounted in the middle of the interior of the machine core front seat, and a gun head is sleeved in the middle of the gun head mounting plate. The top of the gun head penetrates through the top of the machine core front base, the outer wall of the gun head is sleeved with a gun head sleeve, a tail nail pipe base is fixedly installed at the bottom of the installation base, a tail nail rod connector is inserted into the bottom of the tail nail pipe base, and a tail nail discharging connector is inserted into the middle of the bottom of the tail nail rod connector. A position sensing seat is arranged at the joint of the tail nail rod and the gun head in the machine core rear seat, and a second needle bearing and a first needle bearing are connected to the outer wall of the gun head above the position sensing seat in a sleeving mode. And data errors caused by data fluctuation due to external reasons are reduced.