204results about "Needle bearings" patented technology

The invention relates to the technical field of bearings, in particular to a bearing of a harmonic reducer. The operation working condition of the harmonic reducer is relatively complex, and the phenomena of oil seepage and oil leakage are serious sometimes, so that sealing failure is caused. And meanwhile, the cross bearing is not provided with a retainer, so that the rigidity and the bending resistance of the cross bearing cannot meet expected requirements. A bearing of a harmonic reducer comprises two outer rings, and the two outer rings are doubly fastened by a fixing mechanism and a guide mechanism; inner rings are arranged in the two outer rings and extend out of the outer rings; a retainer with an inclined angle is arranged between the two outer rings and the inner ring, a plurality of roller pins are arranged in the retainer, and the roller pins are of a double-row structure; and one ends of the outer ring and the inner ring are provided with sealing mechanisms with keeping elasticity. The starting torque of the retainer can be optimized by more than 10%, which is favorable for saving energy and keeping the stability of the motor. And the arrangement of the double rows of roller pins and the retainer can reduce the overflow of grease.

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.

A mecanum wheel includes a first wheel frame having a circumference and a plurality of first mounting mechanisms spaced about the circumference. There is a second wheel frame having a circumference and a like plurality of second mounting mechanisms spaced about the circumference. There are a plurality of roller units, each having a roller surface and a hollow center cavity. There is an axle disposed in the hollow center cavity of each roller, and a first end of the axle is connected a first mounting mechanisms and the second end of each axle is connected to the second mounting mechanism. The second end of each axle includes a notched portion.

A bearing device includes a bearing having first and second rings configured to rotate relative to each other and a bushing and an electrically insulating insert. The second ring has first and second cylindrical surfaces. The bushing has first and second cylindrical surfaces. The electrically insulating insert is overmolded between and connects the first cylindrical surface of the bushing and the second cylindrical surface of the second ring. The first cylindrical surface of the bushing includes a first annular band of material projecting toward the second cylindrical surface of the second ring, the first annular band of material has a radial surface facing the second cylindrical surface of the second ring, the first annular band of material has an axial width less than an axial width of the bushing, and the radial surface of the first annular band of material includes at least one planar portion.

Provided is a one-way bearing that can reduce weight by changing the material, increase the area of the yield strength, make it less likely to cause fracture or rupture, and effectively extend the service life. 【Solution means】The one-way bearing is used between an input member and an output member, and is composed of a plastic mounting seat body, a plurality of rollers, and a metal conduction seat body. A plurality of mounting grooves penetrating in the radial direction at equal intervals are formed in the plastic mounting seat body, and the plurality of rollers are accommodated in the corresponding plurality of mounting grooves. The metal conduction seat body has a plurality of conduction slopes corresponding to the plurality of mounting grooves on the surface corresponding to the peripheral portion of the plastic mounting seat body. The plurality of rollers on the plastic mounting seat body selectively press the metal conduction seat body by using the plurality of conduction slopes facing each other, and drive in one direction, thereby reducing the weight of the one-way bearing, achieving the effects of weight reduction, cost reduction, and easy processing without affecting the strength of power conduction.

The utility model discloses a large-torque load-bearing bearing, which relates to the technical field of bearings and comprises an outer ring, a vertical curled edge is arranged on one side of the outer ring, and limiting bent edges are arranged on the other side of the outer ring in an annular array manner; the retainer is mounted on the inner side of the outer ring, and the spring pieces and the roller pins are arranged on the inner side of the retainer in an annular array manner; the retainer comprises two side check rings which are arranged in parallel, spacing baffles are integrally arranged on the side faces of the side check rings, and the spacing baffles are distributed on the inner sides of the side check rings in an annular array mode; according to the utility model, the cross section of the outer ring is L-shaped, the position of the retainer is positioned through the curled edge on one side, and the curled edge on the other side of the outer ring is replaced by the limiting bent edges which are arranged in an annular array manner, so that the side space of the outer ring is released, and the torque directly acts on the roller pins, thereby increasing the torque when the load bearing is used.

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 discloses a cross bearing with a dust cover, which comprises a shaft body, shaft heads, oil grooves, roller pins and a shaft sleeve, and the shaft heads are distributed on the periphery of the shaft body in a cross manner; an oil groove is formed in each shaft head, and an oil duct is formed in the top of the shaft sleeve; a shaft sleeve is arranged outside each shaft head in a sleeving manner; the shaft sleeve is rotationally connected with the shaft head through the roller pin; an oil seal assembly is arranged between the open end of the shaft sleeve and the shaft body; a dust cover is installed outside the oil seal assembly. According to the cross bearing oil seal, the dustproof cover is arranged on the oil seal assembly, the sealing performance of the cross bearing oil seal is enhanced through the dustproof cover, meanwhile, gravels can be effectively isolated, and the long-time sealing and lubricating effect is achieved.

Combined radial / axial bearing unit with a bearing sleeve (1) made from a formed sheet metal material, comprising a hollow cylindrical radial bearing region (2) with an outer circumferential raceway (4) for rolling elements (6) guided in a radial cage (5) and a disc-shaped axial bearing region (3) adjacent thereto with a raceway (7) arranged on one of the two side surfaces for rolling elements (9) guided in an axial cage (8), wherein for fixing the radial cage (5) at the end of the hollow cylindrical radial bearing region (2) facing away from the axial bearing region (3) an outer groove (10) produced by forming technology is provided for receiving a snap ring (11) in order to form a self-retaining structural unit, and wherein - the outer groove (10) produced by forming for receiving the retaining ring (11) has a groove region (12) stretched from the hollow cylindrical shape of the radial bearing region (2) with an adjoining, outwardly bent edge region (13), - the ironed edge-side groove area (12) is characterized by a smaller material thickness than the remaining wall area of the bearing sleeve (1), - adjoining the ironed groove region (12) is an outwardly bent edge region (13) at the end, which does not extend as far as the radial direction and forms a trough shape for receiving the snap ring (11).

Gear arrangement for driving a wheel (18), comprising a gear unit (10) driven by a motor (12), which has an output element 20 rotatable relative to the wheel (18) about an axis coaxial to the wheel, a radial bearing (26) for centering the output element (20) on the wheel (18), and a freewheel (28) for unidirectional transmission of a torque from the output element (20) to the wheel (18), characterized in that a running ring (34) of the radial bearing simultaneously forms a running ring of the freewheel (28).

The utility model discloses a roller pin spinning roller structure, which comprises a spinning roller shaft, the spinning roller is arranged on the spinning roller shaft in a sleeving manner; the rolling needles are arranged between the rotating wheel shaft and the rotating wheel, and the rolling needles are sequentially arranged along the periphery of the rotating wheel shaft; the glands are pressed at the two ends of the spinning roller; and the needle bearing is arranged between the gland and the spinning roller. The rolling needle spinning roller structure is simple in structure and reasonable and compact in design, the bearing capacity of the spinning roller structure can be effectively improved, the size of the spinning roller can be effectively reduced under the condition of the same bearing capacity, the service life of the spinning roller can be effectively prolonged, and therefore cost can be effectively saved.

To suppress the occurrence of micro-spalling even in an area shallower than 40 μm from a surface, thereby prolonging a service life of a rolling bearing used in lean lubrication environment in increasingly electrified devices such as an e-Axle and multi-stage automatic transmissions (AT).SOLUTION: A rolling bearing uses a rolling component consisting of a planetary gear 1 corresponding to an outer ring of the rolling bearing, a shaft 2 corresponding to an inner ring, and rolling elements 3, where a micro-Vickers hardness is 800 to 930 Hv0.1 from a surface to a depth of 25 μm, an absolute value of a residual compressive stress on the surface is 850 MPa or more, and a half-width of an X-ray diffraction peak on the surface is 6.0 to 6.7°.SELECTED DRAWING: Figure 2

A sealing structure for an electric hammer includes a head shell and a rotating sleeve. An insert is fixedly connected to the head shell. The insert removes material at one time to form a stepped through hole with multiple steps of diameter ranging from large to small. The rotating sleeve is located in the stepped through hole. A rolling element and a sealing ring are provided between the insert and the rotating sleeve. The rolling element and the sealing ring are respectively located on adjacent steps in the stepped through hole. The diameter of the step where the sealing ring is located is larger than the diameter of the step where the rolling element is located. Since the outer peripheral surface of the insert and the stepped through hole are completed at one time, the adverse effects of the sealing ring's sealing performance due to coaxiality differences are eliminated. Since needle rollers are used instead of ball bearings, the damage to the sealing ring's sealing performance by the distance sleeve is eliminated. At the same time, a rolling element is used for centering between the insert and the rotating sleeve, eliminating the factor that reduces the sealing performance of the sealing ring due to unstable internal and external spacing. Based on the above elimination of the three major factors affecting the sealing performance of the sealing ring, the oil leakage problem of the electric hammer is fundamentally solved.

To provide a rolling member capable of prolonging the service life by suppressing micro-spalling.SOLUTION: The hardness at a depth of 0. 05mm or more and 0. 20mm or less from a contact surface, which is a surface where needle roller 2 comes into contact with another component, is 733HV or more. The contact surface has a surface roughness Ra of 0.01 μm or more and 0.05 μm or less. The nitrogen concentration of the surface layer portion including the contact surface is 0.20 mass% or more and 0.60 mass% or less.SELECTED DRAWING: Figure 2

The plane thrust double-row bearing comprises a plane retainer and a plurality of roller pins, the plane retainer comprises a center mounting hole, and the plane where the center mounting hole is located is a datum plane; the first roller pin mounting part and the second roller pin mounting part are annularly arranged along the reference surface; the first roller pin mounting part comprises a first protruding part which is formed by stamping and protruding towards the upper surface or the lower surface of the reference surface, and the second roller pin mounting part comprises a second protruding part which is arranged in a direction opposite to that of the first protruding part; the first protruding part and the second protruding part are each provided with a plurality of rolling needle installation grooves in an annular punch forming mode, rolling needles are arranged in the rolling needle installation grooves, the double-row bearing is of a thin-wall retainer structure, the manufacturing cost is low, two rows of rolling needles are arranged on the retainer, the structure is small, and the load is large; the large load requirement can be met under the condition that the size of the product is relatively small.

A bearing device and a linear adjustment device, the bearing device having: a rotation-translation converter (28) comprising an axially positionally fixed, rotating first member and a second member axially movable by rotation of the first member; the utility model relates to a needle roller bearing, in particular a needle roller bearing, comprising a support member and an axial bearing (1), via which a rotating first member is supported on the support member, the axial bearing (1) being a needle roller bearing with only one cage (2), the cage (2) having a plurality of first pockets (5) laid with needle rollers and a plurality of second pockets (6) separate from the first pockets (5) laid with needle rollers, the second pockets (6) being spaced apart from the first pockets (5) and the second pockets (6) being spaced apart from the first pockets (5) and the second pockets (6) being spaced apart from the first pockets (5). The first pocket has a first base circle diameter (F1) and the second pocket has a second base circle diameter (F2), where the second base circle diameter (F2) is greater than the first base circle diameter (F1).

The invention discloses a needle bearing, a speed reducer and an industrial robot, the needle bearing comprises a retainer and a plurality of rolling bodies, the plurality of rolling bodies are arranged in the retainer and are uniformly arranged around the axis of the needle bearing, the diameter of the inscribed circle of each rolling body is D2, the diameter of the circumscribed circle of each rolling body is D3, and the diameter of the inscribed circle of each rolling body is D2; the reference constant # imgabs0 # # imgabs1 # represents that the calculation result of pi * (D3 + D2) / (D3-D2) is rounded down, and x is smaller than 0.35. The reference constant x is determined according to the excircle diameters and the incircle diameters of the rolling bodies of the needle bearing, and when x is smaller than 0.35, the number of the rolling bodies contained in the needle bearing is optimal, so that the maximum contact stress of the needle bearing is reduced, the abrasion of the needle bearing is reduced, and the service life of the needle bearing is prolonged.

Axial end portions (16) in the column portions (14) of the cage (12) are arranged on the outer diameter side, axial central portions (17) in the column portions (14) are arranged on the inner diameter side, the axial end portions (16) and the axial central portions (17) have pocket wall surfaces (18) facing the pockets (15), an inner diameter side region in the pocket wall surface (18) provided in the axial end portion (16) and an outer diameter side region in the pocket wall surface (18) provided in the axial central portion (17) constitute a repeating region (Rb) which repeats in the radial position, the repeating region (Rb) includes a roller guide surface which guides the needle-shaped roller (11), and intersects with a pitch circle (PCD) of the needle-shaped roller (11).

The utility model discloses a combined needle bearing for a high-speed rail braking system, and relates to the technical field of needle bearings. The device comprises a first shaft sleeve, a plurality of supporting rods are fixed to one side of the first shaft sleeve, and a plurality of limiting sleeves are fixed to one side of the first shaft sleeve; a mounting plate is fixed at one end of the limiting sleeve; a first mounting hole is formed in the surface of the mounting plate; roller pins are rotationally connected to the outer sides of the supporting rods; a plurality of limiting grooves are formed in one side of the second shaft sleeve; second mounting holes are formed in the inner walls of the limiting grooves, and multiple limiting holes are formed in the surface of the second shaft sleeve. Under the action of the second shaft sleeve and the reinforcing ring, the roller pin part can be flexibly replaced, the situation that the whole bearing needs to be replaced due to abrasion of the roller pin part is avoided, the structure of the device is reasonable, the structure of the bearing is stable during normal use, and the service life of the bearing is prolonged. And the second shaft sleeve and the reinforcing ring simultaneously fix the other end of the roller pin, so that the roller pin is prevented from shaking during use.

The utility model discloses a needle bearing axial positioning structure which comprises a fixing disc, a positioning cylinder is integrally formed on the front surface of the fixing disc, a clamping ring is arranged on the rear portion of the fixing disc, a plurality of containing grooves are formed in the rear surface of the clamping ring, a plurality of fixing holes are formed in the front surface of the clamping ring and the front surface of the fixing disc, and the positioning cylinder is arranged on the front surface of the fixing disc. A plurality of threaded holes are formed in the rear surface of the fixing disc, bolts are arranged in the containing grooves, the bolts penetrate through the fixing holes in the inner sides to be in threaded connection with the threaded holes, anti-loosening mechanisms are arranged in the containing grooves, needle bearing shafts are arranged in the positioning cylinders, needle bearings are placed in the positioning cylinders, and the needle bearings are fixed through the needle bearing shafts. Then the bolt is inserted into the inner side fixing hole, the bolt and the threaded hole are in threaded connection through a wrench, the needle bearing is clamped by the clamping ring and positioned, then the connecting block is held, the limiting strip is inserted into the limiting groove, the baffle abuts against the bolt, and therefore the situation that due to vibration, the bolt rotates reversely and is loosened, and positioning fails is prevented.

The utility model relates to the technical field of bearing machinery, in particular to a bearing of a robot dog. A joint of an existing robot dog adopts a crisscross bearing, and a crisscross bearing raceway is provided with a cracking opening and is not provided with a retainer, so that after the robot dog runs for a long time, the service life is relatively short, and the rigidity and the bending resistance cannot meet the expected requirements. The utility model discloses a bearing of a robot dog. A first outer ring and a second outer ring are doubly fastened by a fixing mechanism and a guide mechanism; a retainer with an inclined angle is arranged among the first outer ring, the second outer ring and the inner ring, a plurality of roller pins are arranged in the retainer, and the roller pins are of a double-row structure; the retainer main body is of a conical structure, the section of the retainer main body is of an approximately fusiform structure, and the roller pin grooves are of a quadrilateral structure; and at least one end among the first outer ring, the second outer ring and the inner ring is provided with a sealing mechanism. The retainer is reasonable in structure, the retainer of an approximate fusiform structure can work in a narrow space, and the special quadrangular structure increases the strength and reduces the layout of the space.

A low axial runout driven pulley through the application of a spindle shaft utilizing multiple sets of bearings with radial clearance to the shaft. Utilizing a belt-driven pulley supporting overhanging loads with low axial runout provided by a spindle shaft with radial clearance to supporting bearings. Further axial clamp loading may be provided through multiple sets of bearings by the application of a fastener, such as a shaft bolt and a sleeve that press against the inner races of the bearings in the axial direction with this clamp load. The belt-driven pulley with low axial runout through the application of a spindle shaft utilizing at least two sets of bearings with radial clearance to the shaft may be utilized with heavy-duty trucking, marine, industrial, and other systems that utilize an overhung driven component.

The application discloses a high-load-capacity needle bearing and relates to the technical field of bearings. The high-load-capacity needle bearing comprises a bearing ring assembly, a bearing retaining assembly and a guide assembly fixed on the surface of the bearing retaining assembly. The bearing retaining assembly comprises a retainer, the outer surface of the retainer is provided with an installation groove, and the inner wall of the installation groove is uniformly provided with a plurality of needle holes in the circumferential direction. When the ceramic material-made ball body is in contact with the outer ring side groove and the inner ring side groove, the rolling friction coefficient is significantly reduced, which helps to reduce energy loss and improve the rotating speed of the bearing during operation. The ball body can share part of the load borne by the retainer. During the operation of the bearing, especially when a large radial or axial load is borne, the ball body can uniformly transmit part of the load to the bearing outer ring and the bearing inner ring, thereby reducing the burden of the retainer and improving the overall load-carrying capacity of the bearing.

The invention relates to an axial rolling bearing unit with rolling bodies (4) which are arranged between two annular axial bearing washers (1, 2) and which are guided by means of a bearing cage (3) formed from a sheet metal material, said bearing cage having a respective edge rim (5, 6) extending in the axial direction radially on the interior and on the exterior in order to radially guide the rolling bodies (4). At least one of the edge rims (5) is provided with a bent terminal section (7) in the counter-direction so as have a double-rim design, the distal end section (8) of which is designed as a form-fitting holding means of the bearing cage (3) for the at least one axial bearing washer (1).

The driven bearing (1) has: an inner member (10) including a first body portion (50) and a flange portion (52); an outer ring (20); a plurality of rolling elements (40); and a first sealing member (30A), including an annular first portion disposed between the outer peripheral surface (52A) of the flange portion (52) and a first surface (22A), and at least a portion thereof forming a sealing structure with the outer ring (20). The first portion has a shape in which the outer diameter in the axial direction increases as it approaches the end face (52B) of the flange portion (52) opposite to the first rolling surface (51A).

Planetary gear carrier arrangement (1) of a planetary gear in which a number of planet gears (2) are rotatably arranged on each bearing pin (3) about an axis of rotation (a), wherein the bearing of the planet gear (2) on the bearing pin (3) is effected by a radial bearing (4) and an axial bearing (5) and wherein the axial bearing (5) is effected by at least one bearing disk (5), wherein the bearing disc (5) has at least one axially extending projection (7) along its circumference at a radially internal recess (6), wherein the radial bearing (4) comprises at least one needle roller bearing (4), wherein the needle roller bearing (4) comprises a cage (8), wherein the cage (8) has a radially inward surface (9) which is designed for the attachment of at least one projection (7), characterized by that the radially inner surface (9) is a recess that is incorporated into the cage (8).

The utility model discloses an impact-resistant needle bearing, and belongs to the technical field of needle bearings. The inner bearing is arranged in the outer bearing; the mounting disc is movably connected to the rear side of the outer bearing in an inserted mode, the front end of the mounting disc is fixedly connected with a roller pin frame, the roller pin frame is movably connected between the outer bearing and the inner bearing in an inserted mode, and a positioning disc is arranged at the front end of the roller pin frame; according to the utility model, the screw cap and the stud are in threaded fit, so that the positioning disc and the roller pin frame can be conveniently mounted, the roller pins can be conveniently mounted, and the convenience in mounting and dismounting is optimized through the screw cap and the stud, so that the roller pins can be conveniently replaced.

Needle cage for guiding needle rollers of a needle roller bearing of a planet gear of a planetary gear on a planet carrier, the needle cage comprising a flange, wherein the needle cage is designed such that a thrust washer can be arranged radially outside on the needle cage; and planetary gear with a planet gear mounted on a planet carrier, a needle cage for guiding needle rollers of a needle roller bearing of the planet gear, wherein a region between the planet carrier and the needle cage is thrust washer-free.

The invention relates to a robot arm (1) for a robot (10), comprising a robot hand shaft (2) having a plurality of arm sections (3, 4), a first arm section (3) and a second arm section (4) of the robot hand shaft (2) being mounted relative to one another by means of at least one angular contact needle bearing (5), the angular contact needle bearing comprises a rotationally fixed first bearing ring (6) which is mounted on the first arm section (3) and a second bearing ring (7) which is mounted so as to be rotatable relative to the first bearing ring, the rotationally fixed first bearing ring (6) being mounted on the first arm section (3) and the second bearing ring (7) being mounted so as to be rotatable relative to the first bearing ring (6). A rotatably mounted second bearing ring (7) is supported on the second arm section (4) and is operatively connected to at least one first cable (12a) designed to adjust the rotational position of the second bearing ring (7) relative to the first bearing ring (6) in at least a first rotational direction by actuation by means of a motor unit (8). The invention also relates to a robot (10) comprising such a robot arm (1).