119 results about "Ball bearing motor" patented technology

The invention discloses a multi-phase single winding non-bearing motor driving system, which comprises a multi-phase alternating current motor, a multi-phase inverter, an inversion driving unit, a detection unit, a torque and rotary speed control unit, a suspended control unit and a comprehensive unit, wherein the multi-phase alternating current motor has a set of windings with phase number n>=5, a motor stator winding is formed by windings whose axial lines are separated in an angle of 2 pi/n, each phase winding simultaneously comprises odd spatial harmonics and even spatial harmonics, the torque and the suspended control of the multi-phase alternating current motor are respectively finished in different control freedom degrees, two groups of currents with different phase differences of adjacent phases are simultaneously electrified into the motor through the multi-phase inverter for respectively realizing the torque driving and the rotor suspension of the driving system. The motor driving system adopts a set of multi-phase motor windings and a set of multi-phase univertor, realizes the non-bearing operation of the driving system, and has the windings with simple structure, is much easier to embed wires than a traditional double-winding non-bearing motor, is easy to realize the large power driving, and has higher reliability.

The invention provides a paper sheet thickness detection device which can be disposed on an automatic note processing device and accurately detect altered notes bound with tapes. The paper sheet thickness detection device comprises a housing supporting detection rollers and reference rollers in a rotary manner, and a plurality of displacement detection sensors disposed on the upper surface, which is opposite to the detection rollers, of the housing and used for detecting displacements of the detection rollers. The paper sheet thickness detection device is used for detecting the thicknesses of paper sheets conveyed through contact parts between the reference rollers and the detection rollers. Inner rings of ball bearings are fixed to the both ends of a rotating shaft of the reference rollers and a rotating shaft of the detection rollers; outer rings of the ball bearings fixed to the ends of one of the rotating shafts of the reference rollers and the detection rollers are fixed to installation holes of the housing; and the outer rings of the ball bearings installed on the ends of the other rotating shaft of the reference rollers and the detections rollers are inserted in the installation holes of the housing.

The invention provides an electromagnetic type rigidity-variable flexible rotating joint of the technical field of robots. The electromagnetic type rigidity-variable flexible rotating joint comprises an electromagnetic rigidity variable unit provided with an output shaft, a joint outer shell and a base, wherein the joint outer shell, the base and the electromagnetic rigidity variable unit are coaxially arranged. A first ball bearing and a second ball bearing are fixed the two ends of the output end, the first ball bearing is arranged in the joint outer shell, and the second ball bearing is arranged in the base. The electromagnetic rigidity variable unit comprises a stator and a rotor which are coaxially arranged with the output shaft. A plurality of stator iron cores are evenly distributed in the stator in the circumferential direction and wound with stator coils, the rotor is arranged in the stator, and the rotor and the stator iron cores are oppositely arranged. The output shaft is fixedly connected with the rotor through a key groove structure, and a check ring is arranged on the upper end face of the rotor and connected with the first ball bearing. According to the electromagnetic type rigidity-variable flexible rotating joint, torsion rigidity of the rotating joint is controlled and adjusted through electric current; and the electromagnetic type rigidity-variable flexible rotating joint has the characteristics that the mechanical structure is simple, weight is light, the size is small, and rigidity adjustment is quick and convenient.

Systems and methods to reduce manufacturing and assembly costs for measures to avoid blocking or creeping ball conditions for linear ball bearings are disclosed. In preferred embodiments two linear ball bearings, a fixed ball bearing and a non-locating ball bearing, are applied to guide movements of a lens barrel of camera modules. Ball cages, which are integrated either in a moving part or in a fixed part of an actuator, are lowering manufacturing and assembly costs. A constant magnetic preload force is applied to both ball bearings to keep the bearings together in case of a mechanic shock. Ball bearing contact points of the fixed ball bearing are shifted asymmetrically by a small angle to withstand horizontal preload forces.

A bearing assembly particularly suitable for the rotor arrangement of an electrical motor or generator includes a bearing located in a housing. The bearing has an inner race, an outer race, and a plurality of ball bearings between the inner and outer races. A portion of the housing is made up of a deformable flexible wall which permits the housing to conform to the shape of the outer race member, rather than forcing the outer race to conform to the shape of the housing, as was experienced hitherto.

The invention discloses a device for measuring friction torque of a curved groove ball bearing and belongs to the field of mechanical engineering. The device is composed of a motor reducer, gears, a rotor, a base, a chuck, a loading device, and a tension sensor. In order to solve the problem that measuring precision is affected since a pull rope in an existing device for measuring friction torqueof a curved groove ball bearing swings up and down during measuring, a template for processing a curved groove in the outer circle of the original curved groove ball bearing or a curved groove ball bearing of the same type is used as the rotor for use with a phase adjusting mechanism, vertical swing of the curved groove in the outer circle is counteracted by the vertical swing of a curved groove in the template during rotation, the pull rope is kept not swinging up and down during the testing of the friction torque of the curved groove ball bearing, and measuring precision is improved. The device disclosed herein has the advantages that by using the rotor having the same swing amplitude and period as a curved groove ball bearing, vertical swing of the curved groove ball bearing can be eliminated; loading is easy, and adjusting is convenient; the device is simple in structure and low in cost.

A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To enable the disk body to absorb high radial and axial strong forces encountered during the engagement of the disk on a solid rock, the disk body is designed as a one-part disk body with a blind hole with its surface and the bearing journal surface being designed as components of the bearing. The bearing involves the combination of a radial and thrust bearing each, where the thrust bearing is milled into the track of the radial bearing. A ball bearing is used as the axial bearing and a needle roller bearing, a cylindrical roller bearing or a slide bearing is used as the radial bearing. The diameter of the ball bearing is larger than the diameter of the needle rollers, or the cylindrical rollers or the thickness of the sliding bush of the slide bearing.

The invention relates to the technical field of accessory devices for garment processing, in particular to a dye preparation device for garment processing. The stirring efficiency is improved and thestirring effect is enhanced, a working chamber is convenient to clean, and use reliability is raised; and the configuration in the working chamber is convenient to observe and practicality is enhanced. The device of the invention comprises a preparation box, a motor, a reducer, a feed pipe, a discharging tube, a water supply pipe, a transmission shaft, four connecting plates, a ring gear, an upperdead plate, a lower dead plate, two rotating shafts, a first ball bearing, a second ball bearing, a third ball bearing, two fourth ball bearings, two fifth ball bearings, two first gears, internal teeth, a second gear, multiple first stirring blades and multiple second stirring blades, and further comprises four nozzles, four medium pressure pumps and a sampling device. The sampling device comprises a sampling box, a connecting tube, a sampling tube, a threaded rod, a threaded tube, an upper sealing plate, a lower sealing plate and a connecting rod.

Embodiments of the invention are directed to keeping a height of a pivot bearing low in order to build a thinner magnetic disk drive. In one embodiment, a ball bearing is provided between a shaft and a sleeve. An inner race of the ball bearing is secured to the shaft through bonding or the like. An outer race of the ball bearing is secured to the sleeve through bonding or the like. A bearing ball is placed between the inner race and the outer race of the ball bearing. A magnet is fitted to the outer race of the ball bearing. A magnet is mounted on a circular plate mounted on one end of the shaft. The magnet is located at a position opposing the magnet mounted on the outer race so as to generate a repulsive force therebetween.

Disclosed is a pre-tightening device of coupled thrust ball bearings. The pre-tightening device of coupled thrust ball bearings includes a nut, a circular inclined section spring, and two clamping plates. The two thrust ball bearings are arranged on a transmission shaft back to back in a sleeving mode and the outer rings are all supported on a bearing seat; the inner rings of the two thrust ball bearings are fixed through the nut and a first shaft sleeve; the outer rings of the two thrust ball bearings are fixed through a bearing end cover, and a second shaft sleeve; a first clamping plate isarranged on the shaft shoulder of the transmission shaft; a second clamping plate is arranged on an inner ring of the thrust ball bearing close to the shaft shoulder of the transmission shaft; an elastic part is arranged between the first clamping plate and the second clamping plate in a clamping mode; and the elastic part is pressed by force when the nut is tightly screwed. According to the pre-tightening device of coupled thrust ball bearings, the circular inclined section spring is adopted, the contact area is larger and elastic force is uniformed. During arranging, the spring is forced togenerate certain pre-compression by screwing the nut tightly in different degrees, and amount of clearance generated by abrasion of a rolling element and a roller path can be compensated automaticallyin virtue of a characteristic of automatic recovery of deformation of a spring.

The invention provides a bearing inner ring and a full-ball bearing. The full-ball bearing comprises a ball, the bearing inner ring and a bearing outer ring, wherein the axes of the bearing inner ring and the bearing outer ring extend left and right. The bearing inner ring is provided with a flat outer circumferential face used for being in rolling fit with the ball, and the diameter of the flat outer circumferential face is unchanged in the axial direction. An inner circumferential face of the bearing outer ring is provided with an arc rolling track which is in rolling fit with the ball and protrudes outwards in the radial direction. Thus, the groove curvature of the bearing inner ring is almost infinite and far higher than that of the arc rolling track of the bearing outer ring, friction caused by differential sliding is eliminated, and frictional torque is reduced. The bearing inner ring is free of channels, so that the machining difficulty and machining cost of the bearing inner ring are effectively reduced. Meanwhile, when rotating at high speed, the ball moves outwards in the radial direction under centrifugal force and is tightly attached to the arc rolling track on the inner circumferential face of the bearing outer ring, the arc face of the arc rolling track limits the ball in the axial direction, it is ensured that the ball rotates stably, and bearing stability is improved.

The invention discloses a turbocharger with double ball bearings, which comprises a rotor spindle with a turbine and an impeller, an intermediate body and a diffusion board, wherein the rotor spindle is supported by a first bearing and a second bearing to be arranged in the intermediate body; the first bearing and the second bearing are mixing angle contact ceramic ball bearings; a distance spring housing is arranged between the first bearing and the second bearing; a spring is arranged in the distance spring housing; a fuel feed hole is arranged on the intermediate body; a fuel feed locating pin is arranged on the fuel feed hole; and the fuel feed hole is connected with a lubricant passage communicated with the distance spring housing. The turbocharger with double ball bearings has the advantages that the structure is simple; the starting response speed is accelerated; the acceleration performance, the kinaesthetic and the operating feeling of vehicles can be greatly improved; and the requirements on lubricating oil are low and the actual life is enhanced because the friction of the ball bearings is less.

The invention relates to a ball bearing. The ball bearing is structurally characterized in that an annular dual-row ball roller path is arranged correspondingly between a bearing outer ring and a bearing inner ring; two columns of balls are arranged on the annular dual-row ball roller path; half-moon-type concave antifriction retainers which are arrayed uniformly are placed among the balls; and I-shaped or rectangular structural lubrication holes are arranged at the middle position of the half-moon-type concave structure. The friction between the balls and the roller path can be reduced effectively by the structure; teflon materials are adopted as lubrication materials, which is good for prolonging the service life of the bearing; and the teflon materials have the advantages of extremely low friction coefficient, high self-lubrication capability, abrasion resistance, high-temperature resistance and the like.

The invention relates to a method and a device for measuring a contact angle of a ball bearing. The method comprises the steps of applying an axial preload on an outer ring of the bearing; rotating an inner ring of the bearing and the outer ring of the bearing in opposite directions; regulating the rotating speed of the inner ring of the bearing and the outer ring of the bearing so as to record the rotating speed of the inner ring of the bearing and the outer ring of the bearing when a bearing cage keeps relatively static; and computing the contact angle of the bearing according to the formula of alpha=arccos[Dcp(ni+ne)/Dw(ni-ne)]. The device provided by the invention comprises a working table; a speed regulating motor is installed on the working table; an output shaft of the speed regulating motor is provided with a mandrel; the upper part of the bearing is provided with a load block of the outer ring of the bearing for compacting the bearing; the upper part of the load block is provided with a load block driving device; and the working table is provided with a speed measuring device for measuring the rotating speed of the load block and the mandrel. According to the method and the device, the contact angle is computed through the rotating speed ratio of the inner ring of the bearing to the outer ring of the bearing when the differential speed is equal to 0; and the method is convenient to operate and accurate and reliable in a measuring result.

To determine the contact angle of a ball bearing, one of two rings is rotated while the other ring is held stationary. The number of revolutions of the rotated ring and the number of revolutions accomplished in the same period by the balls, and therefore by the retaining cage, are detected. The revolutions of the balls are detected through an optical detecting device which projects a radiation through the bearing, in the gap between the outer and inner rings, whereby the radiation is intercepted directly by the balls and/or the cage. The contact angle is determined using the following parameters: the number of revolutions of the rotating ring, the number of revolutions of the balls or of the cage, the diameter of the balls, and the pitch diameter.

The invention discloses an axial and radial combined deep groove ball thrust ball bearing which comprises a radial bearing assembly and an axial bearing assembly; the radial bearing assembly comprises an outer ring, an inner ring and a radial bearing steel ball mounted between the outer ring and the inner ring in a rolling manner; the radial bearing steel ball is mounted on a radial retainer; the axial bearing assembly comprises an inner ring, a race and an axial steel ball group connected between the inner ring and the race in a rolling manner; and the axial steel ball group is mounted on an axial retainer. The axial bearing force of the axial and radial combined deep groove ball thrust ball bearing is greatly increased; the axial and radial combined deep groove ball thrust ball bearing can bear higher revolving speed, saves the mounting space, is convenient to mount, reduces the mounting spoilage, and prolongs the service life; the inner ring of the radial bearing assembly serves as a blowout patch of the axial bearing assembly, so that the space is saved, the cost is reduced, and the service life is prolonged; and the axial and radial combined deep groove ball thrust ball bearing is compact in structure and more stable in operation, improves the coaxiality, can bear higher revolving speed, and lowers the noise.

A steering gear assembly includes a pinion defining a pinion axis and a rack defining a rack axis. A bearing assembly includes a roller bearing biased against the rack to generate a normal force pressing the rack into engagement with the pinion. The bearing assembly engages an outer surface of the rack at two points circumferentially spanning a large angle to provide improved support. The roller bearing is preferably a plurality of ball bearings engaging an outer race. A deformable member may be utilized that is positioned between the outer race and the rack housing. The deformable member may comprise a series of O-rings which providing a force biasing the outer race towards the pinion.

The invention discloses a motor, comprising stator, rotor shaft and end cover, where the end cover is equipped with bearing room, a ball bearing is arranged in the bearing room, at least one end of the rotor shaft is supported in the ball bearing, the inner wall of the bearing room has an inner spherical surface contacting a side spherical surface of the ball bearing, the inlet end of the bearing room is fastened with an elastic shield ring, the elastic shield ring has an inner spherical surface contacting the other side spherical surface of the ball bearing. And it can make the pressure of the elastic shield ring to the bearing meet the design requirements, unable to cause higher or lower pressure phenomenon and convenient to manufacture and low-cost.

The invention relates to a linear stroke transmission device of an electric valve actuator, which comprises a thrust base, a bracket, a driving shaft housing and a thrust rod. One end of the thrust rod is provided with a screw rod, and the other end thereof is fixedly connected with a valve rod of a controlled valve by a plywood; the two sides of the plywood are embedded in the vertical groove of the bracket; as the screw rod of the thrust rod is provided with arc groove threads, the driving shaft housing is evenly provided with ball bearing holes along the spiral direction corresponding to the arc groove threads of the thrust rod, and ball bearings and needle rollers are arranged in the ball bearing holes; the ball bearings are provided with spherical circular arcs matched with the thrust rod arc groove threads; and the driving shaft housing outside the needle rollers is provided with a fixed housing. External threads of the thrust rod are matched the ball bearings in the driving shaft housing in a rolling way for transmission so as to reduce the friction and improve the fitting accuracy thereof; in addition, the transmission device has the advantages of stable and reliable accuracy control, and long product service life and the like, thus being applied to adjustment of the valve actuator.

The invention belongs to the technical field of bearings and particularly provides a ball bearing which comprises an inner ring, an outer ring, a rolling body and a first holder. The ball bearing further comprises rotating devices and balls. The inner ring is in a ball shape. An installing hole of an installing shaft is formed in the middle portion of the inner ring. The rotating devices are arranged on the top and the bottom of the inner ring correspondingly. Each rotating device comprises a rotating ring and cushion blocks. An outer ring of each rotating ring is provided with a set of cushion blocks. The ends of the cushion blocks are connected with the balls. The sides of the balls make contact with the rolling body, and the other sides of the balls are installed in a vertical groove inthe outer side of the inner ring. The balls form a circular ring shape. Two sets of balls in the circular ring shape are installed on the periphery of the inner ring through a second holder. The balls push an arc-shaped sliding block to slide, lubricating oil in an oil tank is splashed to the balls through a spring piece, the coverage area of the lubricating oil is increased, and thus the lubricating effect is improved.