1304results about "Rolling contact bearings" patented technology

The invention relates to the technical field of bearings, and discloses a ceramic angular contact ball bearing with high bearing capacity, the ceramic angular contact ball bearing comprises an outer ring, an inner ring, a rolling body, a retainer and an oil storage cavity, the outer ring is of a cylindrical structure, and the inner surface of the outer ring is in contact with the rolling body; the inner ring is positioned inside the outer ring, and the outer surface of the inner ring is contacted with the rolling body; and the rolling bodies are a plurality of spherical ceramic elements which are fixed and separated by the retainer. By optimizing the arrangement mode and material selection of the rolling bodies, the bearing has higher bearing capacity and anti-overturning performance under the high-load condition; the heat dissipation through holes are formed in the retainer, so that the heat dissipation performance of the bearing in the running process is remarkably improved, and the bearing failure risk caused by overheating is reduced; through the design of the oil storage cavity and the oil outlet micropores matched with the oil storage cavity, uniform supply of lubricating oil is achieved, and friction loss between the rolling body and the inner ring and the outer ring is reduced.

A hub motor includes a housing rotatably disposed to a first shaft and a second shaft, and a motor installed in the housing and having a stator and a rotor. A reduction mechanism is installed in the housing, including a gear shaft connected with the rotor, a fixed bracket connected with the stator, a movable bracket disposed on the gear shaft and the second shaft, a first ring gear disposed to the fixed bracket, a second ring gear disposed to the housing, multiple first planet gears disposed to the movable bracket and meshed with the gear shaft and the first ring gear, and multiple second planet gears disposed to the second shaft and meshed with the movable bracket and the second ring gear. By 10 inserting a hollow tube into the first shaft, the gear shaft, the movable bracket, and the second shaft, the waterproof and dustproof performance can be enhanced.

The invention discloses a gap-controllable retainer and a frictional resistance measuring method thereof, belongs to the technical field of mechanical equipment manufacturing, and solves the problem that an existing device can only test a retainer with a fixed gap and cannot simulate the influence of dynamic gap change on bearing performance. The retainer capable of controlling the gap comprises a retainer body capable of adjusting the gap between the retainer body and a rolling body, a retainer moving assembly and a gap adjusting part. The gap adjusting part comprises an adjusting motor, an eccentric wheel and a motor fixing frame. According to the retainer capable of controlling the gap, the gap between the retainer and a rolling body can be dynamically adjusted, the retainer can be matched with different types of ball-disc testing machines (rotary type and linear contact type) for friction resistance measurement, the gap between the rolling body and a pocket of the retainer can be flexibly adjusted by adjusting the motor and the eccentric wheel, and the friction resistance of the rolling body is measured. And therefore, the retainer main body can meet the retaining and limiting requirements of different working conditions and different types of bearings, and the performance, the service life and the reliability of the bearings are remarkably improved.

The utility model discloses a hub bearing which comprises an outer ring and an inner ring, a flange plate is connected to the inner ring, a connecting groove is formed in the inner ring, a connecting ring is arranged on the connecting groove in a matched mode, and rolling bodies are arranged between the outer ring and the inner ring and between the outer ring and the connecting ring respectively. A first sealing piece is arranged at the end, close to the flange plate, of the outer ring, a second sealing piece is arranged at the end, away from the flange plate, of the outer ring, one end of the first sealing piece is connected to the inner wall of the outer ring, the other end of the first sealing piece extends towards the inner ring, the first sealing piece is wrapped by a first sealing lip, and a sealing step is formed on the inner ring. A gap is formed between the outer edge of the sealing step and the edge of the outer ring, a plurality of sealing grooves are formed in the side wall of the sealing step, and the first sealing lip extends into the sealing grooves to form a first blocking lip. The sealing device is simple in structure, better in sealing effect, more stable in sealing structure and capable of avoiding early failure of a sealing part.

The invention provides a hub bearing unit which comprises a flange outer ring, a flange inner ring and a transmission shaft, the transmission shaft comprises a connecting part and a first spline, the connecting part is inserted into the flange inner ring and fastened through a bolt, the first spline is arranged around the connecting part, a second spline is arranged at the end, facing the transmission shaft, of the flange inner ring, and the second spline is arranged around the connecting part. The flange inner ring comprises an inner hole wall, the first tensioning piece is located on the movement path of the inner hole wall when the flange inner ring and the transmission shaft are assembled, and the first tensioning piece is located on the inner hole wall when the flange inner ring and the transmission shaft are assembled. After the distance between the first spline and the second spline is smaller than the abutting distance, the first spline and the second spline are in interference fit with the inner hole wall. Aiming at the defects in the prior art, the invention provides the hub bearing unit capable of effectively feeding back the spline matching state.

The utility model discloses a bearing assembly, a rotor assembly and an outer rotor fan, the bearing assembly comprises a sleeve, a rotating shaft and a plurality of rolling pieces, and the rotating shaft penetrates through the sleeve; the plurality of rolling pieces are arranged between the rotating shaft and the sleeve, and the rolling pieces are in rolling connection with the rotating shaft and the sleeve. According to the bearing assembly provided by the embodiment of the utility model, the rotating shaft is directly matched with the sleeve and the rolling piece, so that the rotating shaft and the bearing can form an integrated structure, the structure is simplified, and the assembly is convenient.

A bearing system for a compressor including an unloader at least partially received within a recess of a driveshaft. The unloader includes an outer surface that is engaged with a bearing. An inner surface of the unloader is curved such that the unloader is pivotable relative to the driveshaft unload forces on bearing caused by deflection of the driveshaft.

A bearing device (1) is provided which includes a tubular outer ring spacer (26) axially sandwiched between a first outer ring (32) of a first bearing (24) and a second outer ring (36) of a second bearing (25). The outer ring spacer (26) has a double structure in which an outer annulus (26a) and an inner annulus (26b) are used. A circuit (30) in an internal space of the outer ring spacer (26) is divided into a plurality of circuit parts, and circuit boards (30a) provided with the circuit parts, respectively, each have mounting surfaces disposed in parallel with the axial direction of the outer ring spacer (26). The circuit boards (30a) are partially fitted in respective grooves (26e) disposed in the inner annulus (26b).

A bearing assembly system for a vehicle steering system includes a tubular member having a radially inwardly protruding shoulder, the tubular member having a stake portion angling radially inwardly, the stake portion having a stake surface. The bearing assembly system also includes a bearing disposed within the tubular member and in contact with the radially inwardly protruding shoulder. The bearing assembly system further includes a retainer disposed within the tubular member and in contact with the bearing, the bearing disposed between the retainer and the radially inwardly protruding shoulder, the retainer having an angled surface, the angled surface in flush contact with the stake surface in a fully assembled condition.

The invention relates to the technical field of hub bearings, in particular to a hub bearing. The hub bearing comprises an outer ring unit, an inner ring unit, a rolling body, a first dynamic sealing unit and a second dynamic sealing unit. The outer ring unit comprises an outer ring main body and a threaded connection part; the inner ring unit comprises a first inner ring and a second inner ring; the first inner ring comprises an inner ring main body and a flange; the flange and one axial end of the inner ring main body are integrally formed; the inner ring main body and the second inner ring are positioned in the outer ring main body; the end face, facing the flange, of the outer ring body is a first collision face. The end face, facing the outer ring body, of the flange is a second collision face. A movable gap is formed between the first collision surface and the second collision surface; when the axial acceleration of the inner ring unit is 0, the movable clearance is 0.3-0.5 mm; the movable gap is gradually reduced in the direction away from the axis of the hub bearing. Therefore, the problems that the rolling body is subjected to impact loading force for a long time, so that the raceway is subjected to dent deformation, and abnormal sound is generated are solved.

The invention relates to a high-temperature-resistant reusable self-aligning roller bearing, and belongs to the technical field of bearings. A roller is arranged between an inner ring and an outer ring, and the inner ring is made of Al0. 5CrCoFeW0. 5Ni high-entropy alloy; the oxidation resistance, the strength, the stability and the wear resistance during working are met; the outer side surface of the inner ring is subjected to ion implantation modification to form a modified layer of the inner ring; the TiAlN coating reduces energy loss, and the first Ag coating is used for conducting heat and reducing oxidation loss; the outer ring is made of an Al < 0.5 > CoCrFeV < 0.5 > Ni high-entropy alloy; the high bearing capacity, the wear resistance, the fatigue resistance, the dimensional stability and the corrosion resistance in the working process are met; the modified layer on the inner side surface of the outer ring is used for improving the surface hardness and enhancing the wear resistance; the CrAlN coating is used for improving oxidation resistance, and the second Ag coating is used for conducting heat and reducing oxidation loss; the roller is made of an AlCoCrFeNi2. 1Nb0. 6 high-entropy alloy; a lubricating structure on the surface of the roller comprises an annular groove and graphite fluoride; a lubricating film is formed when the raceway and the roller rub each other, and the integrity of the lubricating film is maintained.

A rolling-element bearing includes first and second concentric ring assemblies and rolling elements supporting the ring assemblies for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring mounted axially to the first rolling ring and supporting a first seal element and a second seal element, and the second ring assembly includes a second rolling ring and a second sealing ring mounted axially to the second rolling ring. The first seal element includes a first lip in contact with the second sealing ring and the second seal element includes a second lip in contact with the second sealing ring, the first and second lips delimiting a first chamber between the first and second sealing rings, A first purging channel extends from an inlet at the first chamber to at least one outlet in at least one external surface of the second rolling ring.

The invention discloses a hinge assembly, a mechanical joint and a robot. A plurality of structural members of the hinge assembly comprise a first structural member, a second structural member and a third structural member. The plurality of bearings of the hinge assembly includes a first bearing and a second bearing. In the axial direction, the bearing seat of the second structural part is located between the bearing seat of the first structural part and the third structural part, the first bearing ring is located between the first bearing and the second bearing, and the two end faces of the first bearing ring abut against the inner ring of the first bearing and the inner ring of the second bearing correspondingly. The second bearing ring is located between the second bearing and the third structural part, and the two end faces of the second bearing ring abut against the inner ring of the second bearing and the third structural part correspondingly. The hinge assembly further comprises a fastening assembly, and the fastening assembly fastens the inner ring of the first bearing, the first bearing ring, the inner ring of the second bearing, the second bearing ring and the third structural part together in the axial direction. Therefore, linkage of the third structural part, the inner ring of the first bearing and the inner ring of the second bearing can be achieved.

The invention relates to the technical field of motors, and discloses a heavy load type deep sea motor which comprises a motor shell, the interior of the motor shell is composed of an electromagnetic cavity and a bearing cavity, an electromagnetic shaft system is arranged in the electromagnetic cavity, a bearing shaft system is arranged in the bearing cavity, and the electromagnetic shaft system comprises a stator and a rotor. The stator and the rotor are used for generating electromagnetic torque, the bearing shaft system comprises a bearing shaft, torque is transmitted between the electromagnetic shaft system and the bearing shaft system through a transmission connecting piece, axial relative movement can occur at the joint of the electromagnetic shaft system and the bearing shaft system, and a cooling circulation assembly is arranged outside the motor shell. The two relatively independent cavities are arranged in the motor shell, and the electromagnetic shaft system for providing power is separated from the bearing shaft system for transmitting power, so that the design of the bearing shaft system is basically not limited by an electromagnetic structure, a bearing with higher bearing capacity can be selected, and the axial force bearing capacity of the motor is improved.

The utility model discloses a split bearing for improving the axial loading capacity of a self-aligning roller bearing, and belongs to the technical field of bearings. A split bearing for improving the axial loading capacity of a self-aligning roller bearing comprises a bearing outer ring and a bearing inner ring, the bearing outer ring comprises a left half outer ring and a right half outer ring, the bearing inner ring comprises two half inner rings, the two connecting ends of the left half outer ring and the right half outer ring are connected through two first hexagon socket screws respectively, and the two connecting ends of the left half outer ring and the right half outer ring are connected through two second hexagon socket screws respectively. The butt joint surfaces of the two half-and-half inner rings are in threaded connection through two positive and negative double-end studs respectively; compared with a traditional split type bearing, the split type bearing has the advantages that the structure is simple, fastening can be completed only through screws and bolts, meanwhile, the split type bearing is more suitable for being used in a high-altitude tower seat cabin, a wind power main shaft set with limited space and other working conditions, and the split type bearing has the advantages of being easy to install and replace and low in manufacturing cost.

A device (1) for guiding and adjusting the alignment of a tape of material in transit along a production line comprising an internally hollow rotating idler roller (2) and kinematic connection means to allow said rotating idler roller (2) to perform, in addition to a first rotation (Ri) around its axis (X- X), a second rotation (R2) by a limited angle (a), around a transverse axis (Z-Z) orthogonal to a plane P passing through said central axis (Y-Y), said kinematic connection means being advantageously housed inside the cavity (7) of said rotating idler roller (2) so as to be interposed between said support element (6) and said rotating idler roller (2).

The application relates to the technical field of bearings, in particular to a double-inner-ring double-row angular contact ball bearing which comprises an outer ring, two inner rings are arranged on the inner side of the outer ring, a retainer is arranged between the inner rings and the outer ring, a plurality of rolling balls in annular array arrangement are slidably embedded on the surface of the retainer, the surface of the rolling balls is in contact with the inner wall of the outer ring and the outer surface of the inner rings, and a sealing ring is slidably embedded on the face of each of the two inner rings away from each other. In the using process, the bearing is convenient to assemble, the two retainers and the sealing ring form a relatively integrated structure, the structural strength is effectively improved, compared with a traditional double-row angular contact ball bearing, the axial bearing capacity of the bearing is remarkably improved, the load borne by a single rolling body and a raceway is reduced, the risk of fatigue failure is reduced, meanwhile, the design enhances the capacity of the bearing to simultaneously bear axial load and radial load, and solves the problem that the traditional double-row angular contact ball bearing is difficult to apply under complex working conditions.

The double-wave-head large-reduction-ratio harmonic speed reducer comprises a base gear, a double-layer flexible gear, a wave generator, retainer steel balls and an output gear, the retainer steel balls are arranged between the outer edge of the wave generator and the inner wall of the double-layer flexible gear, and the double-layer flexible gear comprises a first layer of teeth and a second layer of teeth which are connected. The number of the first-layer teeth is larger than that of the second-layer teeth, the first-layer teeth are meshed with inner teeth of the base gear, the second-layer teeth are meshed with inner teeth of the output gear, and the output gear is pivoted with the base gear. Compared with a single-layer flexible gear of an RV speed reducer, the reduction ratio can reach 500-1500, the reduction ratio is larger, and the size of the speed reducer is increased little; compared with a flexible gear of a traditional harmonic speed reducer, when the double-layer gear structure works, the number of teeth is large and reaches more than 30% when the gears are meshed, the teeth are in surface contact, the bearing capacity is high, simultaneous meshing of the multiple teeth is beneficial to error averaging and mutual compensation of errors, and the positioning precision is improved to a large extent.

The invention provides a self-aligning roller bearing with a heat dissipation structure, and relates to the technical field of bearings, the self-aligning roller bearing comprises a bearing seat body and a bearing body; end covers are installed on the left side and the right side of the bearing seat body through bolts, heat dissipation holes are formed in the end covers in an annular array mode and are of a conical structure, and the diameter of the side, close to the bearing seat body, of each heat dissipation hole is larger than that of the side, away from the bearing seat body, of each heat dissipation hole. After the spiral oil storage cavity of the rolling body is filled with high-temperature lubricating grease, the lubricating grease can be automatically supplemented along with temperature, when the bearing operates and heats, the lubricating grease is heated to expand and seeps out through the micro oil outlet holes along a spiral path under the dual action of thermal expansion thrust and the rotating centrifugal force of the rolling body, the higher the temperature is, the more the lubricating grease flows out, and loss of a friction part is supplemented in time; and when the bearing stops rotating or is cooled, the lubricating grease shrinks, the outflow is reduced, and the residual oil returns to the cavity to be stored, so that the lubricating grease is released as required and the residual oil is recycled, the high-temperature lubricating effect is ensured, and excessive consumption of the lubricating grease is avoided.

According to the plunger pump bearing inner and outer ring gap self-adaptive adjustment method and device, magnetic components distributed at intervals in the circumferential direction are embedded into the bearing inner ring, a magnetic flux detection unit corresponding to the magnetic components is arranged at the position, close to the periphery, of the outer ring, and the magnetic field intensity changes of the inner ring and the outer ring are monitored in real time; coil groups in one-to-one correspondence with the magnetic parts are also arranged in the outer ring and are used for generating a controllable magnetic field. The system collects magnetic flux data through the detection unit, judges deviation positions and offsets of the inner ring and the outer ring, controls the corresponding coil assembly to be connected with current according to the offsets, forms a magnetic field with the same or opposite polarity as the magnetic component, and dynamically adjusts the gap. The method can compensate eccentric wear of inner and outer rings caused by non-uniform stress of the main shaft, reduce the wear risk of the roller, improve the running stability of the bearing, prolong the service life of the pump body and optimize the performance.

The embodiment of the invention provides a hub bearing and a machining process thereof, and relates to the technical field of hub bearings. The hub bearing comprises an outer ring, a fixing ring, an inner ring and a flange, the outer ring is mounted on the circumferential outer wall of the inner ring, double rows of raceways are arranged in the outer ring, balls are mounted in the raceways through retainers, one end of the outer ring is connected with the fixing ring, one end of the inner ring is connected with the flange, and a gap between the outer ring and one end of the inner ring is sealed through a sealing ring. A gap between the other ends of the outer ring and the inner ring is sealed through a sealing adjusting mechanism which is installed on the inner ring. Dynamic self-adaptive sealing adjustment is achieved through a mechanical linkage structure of the floating ring, the lever arm and the sealing push ring, slope positioning matching and guide limiting design are combined, it is ensured that sealing pressure is automatically matched along with working conditions and evenly attached to a sealing groove, meanwhile, abrasion resistance and operation stability are improved, the sealing life is remarkably prolonged, and the overall reliability is remarkably improved.

A linear guide (10) comprises: a guide rail (1) having a raceway groove (3) on a side surface; a slider (2) assembled to the guide rail (1) and having a raceway groove (7) facing the raceway groove (3); and a plurality of rolling elements disposed rollably in a rolling element rolling path (23), which is composed of a load rolling path (22) formed by the raceway grooves (3, 7), and a no-load rolling path (21) provided on the slider (2) and communicating between one end and the other end of the load rolling path (22). One of the guide rail (1) and the slider (2) moves relative to the other as the rolling elements roll. The plurality of rolling elements are constituted by a plurality of steel balls (6), and a plurality of spacer balls (16) smaller than the steel balls (6) and having elasticity. At least one spacer ball (16) is always present in the no-load rolling path (21). The length of a gap in which neither the steel balls (6) nor the spacer balls (16) are present in the rolling element rolling path (23) is 50% or less of the diameter of the steel balls (6), regardless of the position of the rolling elements. Consequently, it is possible to provide a rolling guide device that is easy to assemble and has good operability and excellent repeated positioning accuracy.

The embodiment of the utility model discloses a multi-row angular contact thrust ball bearing, which comprises an inner ring, an outer ring and a rolling body arranged between the inner ring and the outer ring, the outer surface of the inner ring is provided with a plurality of rows of raceways, and the diameters of the plurality of rows of raceways are gradually reduced from left to right; the inner surface of the outer ring is provided with a plurality of rows of raceways in one-to-one correspondence with the raceways on the outer surface of the inner ring, and the diameters of the plurality of rows of raceways are also gradually reduced from left to right; and the rolling bodies are arranged in each row of raceways between the inner ring and the outer ring. According to the multi-row angular contact thrust ball bearing disclosed by the embodiment of the utility model, the axial load is greatly improved while the radial load is ensured, and the multi-row angular contact thrust ball bearing can be used in occasions with special requirements on the axial load, the radial load and the axial and radial combined load.

The invention relates to a wheel bearing arrangement, comprising a hub (10), a wheel bearing (20) arranged on the hub (10), a wheel carrier (30) to which the wheel bearing (20) is fixed by means of a wheel bearing outer ring (21), comprising a synchronous universal joint (40) which is axially clamped to the hub (10) by means of a planar tooth meshing device, and comprising a sealing ring (50) which surrounds and seals the planar tooth meshing device on the radially outer side. A sealing ring is pre-assembled on the constant velocity joint and engages with the hub outside the force flow of the wheel bearing in the assembled state of the wheel bearing arrangement, the sealing ring providing a contactless pre-seal for the wheel bearing while interacting with the wheel carrier.

The invention relates to the technical field of hub bearings, in particular to a hub bearing with a variable-curvature raceway. The invention discloses a wheel hub bearing with a variable-curvature raceway. The wheel hub bearing comprises an outer ring unit, an inner ring unit and a plurality of balls, the outer ring unit comprises a bearing outer ring; an outer ring inner side channel and an outer ring outer side channel are formed in the bearing outer ring; the inner ring unit comprises an inner ring flange and a matched inner ring; the inner ring flange is provided with a flange plate channel; the matching inner ring is provided with an inner ring channel; one part of the balls are positioned between the inner ring channel and the inner side channel of the outer ring, and the other part of the balls are positioned between the flange plate channel and the outer side channel of the outer ring; wherein the axis of the bearing outer ring is located in the reference section; in the reference cross section, the outer ring inner side channel is provided with a first cross section line; the first section line comprises a first curve and a second curve; the curvature radius of the first curve is greater than that of the second curve; therefore, the problem of how to consider the friction torque and the axial bearing capacity to prolong the service life of the hub bearing is solved.

The present invention addresses the problem of reducing stress concentration in a hub ring while ensuring the sealing properties of a sealing device in a wheel bearing device. The present invention is configured to satisfy at least one of the following relationships: 0.04 ≤ (r − h) / PCDh ≤ 0.80 where r is a radius of curvature of a stepped section (3i), h is an axial-direction length at a first boundary P1 of a boundary portion between a radial-direction inner end of the stepped section (3i) and a radial-direction outer end of a seal land section (3g) and at a second boundary P2 of a boundary portion between a radial-direction outer end of the stepped section (3i) and a radial-direction inner end of a flange side surface of an axle attachment flange (3b), and PCDh is a pitch circle diameter of a hub bolt (3f); and 0.04 ≤ (d1 − d2) / (2 × PCDh × tanθ) ≤ 0.80 where d1 is a diameter of the first boundary P1, d2 is a diameter of the second boundary P2, PCDh is a pitch circle diameter of the hub bolt (3f), and θ is an angle of a tangent with respect to the radial direction at the first boundary of the stepped section (3i).

An iron-based corrosion resistant and wear resistant alloy. The alloy can comprise (in weight percent) about 0.005-0.5% boron, about 1.2-1.8% carbon, about 0.7-1.5% vanadium, about 7-11% chromium, about 1-3.5% niobium, about 6-11% molybdenum, about 3-10% nickel and the balance including iron and incidental impurities. Alternatively, the Nb content can be replaced or combined with Ti, Zr, Hf and / or Ta such that 1%<(Ti+Zr+Nb+Hf+Ta)≦3.5. The alloy has improved hot hardness and high temperature compressive strength and is suitable for use in elevated temperature applications such as in diesel valve seat inserts.

The present invention provides a grease composition and an axle bearing in which the grease composition is sealed.SOLUTION: The grease composition of the present invention contains a base oil, a thickener, and an additive, the additive contains an organic metal salt of a divalent metal and an inorganic metal salt of a divalent metal, the total mass of the metal content of the organic metal salt and the metal content of the inorganic metal salt is 1.00% by mass or more based on the grease composition, and the metal content of the organic metal salt with respect to the total mass of the metal content of the organic metal salt and the metal content of the inorganic metal salt is 0.20 or more on a mass basis.SELECTED DRAWING: None

Variable pitch propeller, comprising at least two blades and a rotor with a hub, the hub comprising a blade support for each blade of the propeller, each blade comprising a blade foot designed to cooperate with one of said blade supports in order to maintain the blade in position in the rotor while allowing the pitch to be changed, comprising: - a blade foot comprising a composite core (11), disposed in an outer sleeve (13) of the blade support resting on it by means of an elastomer buffer (12), - a blade support (4) having an upper bearing (2) and a lower bearing (3) in contact with the outer sleeve (13), the blade support (4) also comprising at least two half-jaws (14) cooperating with the composite core (11) in order to prevent the blade foot from moving in a radial direction relative to the blade support (4). Figure for the abridged version: Fig 8