221results about "Crankshaft bearings" patented technology

The utility model relates to the technical field of deep groove ball bearings, in particular to a spline connection eccentric rotation combined type shaft connecting bearing. The rolling bearing comprises a crankshaft, a connecting part, a seat body, a retainer and a rolling body, the crankshaft comprises a first shaft extension section, a bearing section and a second shaft extension section, the first shaft extension section and the second shaft extension section are coaxial and staggered, the diameter of the bearing section is larger than that of the first shaft extension section and larger than that of the second shaft extension section, and the bearing section and the second shaft extension section are coaxial. The bearing section is provided with an inner raceway, and the end part of the first shaft extension section is provided with a spline connecting part; the seat body is provided with an outer raceway; the retainer is arranged between the bearing section and the seat body; and the rolling body is arranged in the retainer and is limited between the inner raceway and the outer raceway. According to the utility model, the bearing and the transmission crankshaft are integrated and designed into the combined bearing, so that the spatial arrangement requirement can be met, and the overall weight can be reduced.

To provide an eccentric oscillation type gear device that can prevent a limiting member from being sandwiched between a crank bearing and an eccentric part of a crankshaft.SOLUTION: An eccentric oscillation type gear device comprises: a crankshaft 14 comprising an eccentric part 12A; an eccentric bearing 50A arranged on the eccentric part 12A; a limiting member 52A for limiting axial movement of the eccentric bearing 50A, and provided so as to be relatively rotatable with respect to the crankshaft 14; a crank bearing 54A arranged on the side opposite to the eccentric part 12A in an axial direction across the limiting member 52A, and supporting the crankshaft 14; and a positioning part 56A provided separately from the limiting member 52A, and positioning the crank bearing 54A in the axial direction with respect to the crankshaft 14 by being in contact with the crank bearing 54A from the side of the eccentric part 12A.SELECTED DRAWING: Figure 3

The utility model provides an axial thrust mechanism of an engine crankshaft, which belongs to the technical field of engines and comprises an axial thrust bearing arranged at one end of the crankshaft connected with an engine flywheel, the axial thrust bearing is sleeved on the crankshaft, and the axial thrust bearing limits the crankshaft to move towards one side far away from the flywheel. And the axial thrust bearing is fixed through a bearing seat arranged on the engine shell. According to the mechanism, the axial thrust bearing is additionally arranged at one end, close to the flywheel, of the crankshaft, the bearing is fixed on the shell of the engine, and the thrust bearing is used for bearing huge pressure generated when the clutch works, so that the axial stress of the crankshaft is reduced or eliminated, and the engine is protected.

This invention relates to a lubricating oil composition comprising or resulting from the admixing of: (i) a base oil; (ii) one or more overbased metal based detergents; and (3) a friction modifier comprising glycerol monooleate, glycerol dioleate, glycerol trioleate or combinations thereof at from 0.2 to 1.0 wt. % of the composition. The composition has a total sulfated ash of less than or equal to 1.0 wt. %, a high temperature high shear viscosity at 150° C. (HTHS) as determined according to ASTM D4683-20 of greater than or equal to 1.8 mPa·s and less than or equal to 2.9 mPa·s, and a total phosphorous level of less than or equal to 0.080 wt. %. The inventive composition provides a 10% to 80% decrease in journal bearing wear as measured by wear scar volume in μm3 using the MTM-R test method compared to a lubricating oil composition of comparable HTHS, but not including a friction modifier comprising glycerol monooleate, glycerol dioleate, glycerol trioleate or combinations thereof. Also provided are a method of decreasing journal bearing wear in an internal combustion engine and a method of making the lubricating oil composition.

A semi-split bearing that constitutes a sliding bearing that is less likely to be damaged during operation of an internal combustion engine is provided. The semi-split bearing includes at least one protrusion that protrudes from an outer peripheral surface to a radially outer side. A recess that is recessed from the outer peripheral surface to a radially inner side is formed in the entire range of a circumferential length between the protrusion and a circumferential end surface of the semi-split bearing. Two radial grooves are formed in the circumferential end surface of the semi-split bearing with respect to the protrusion, and are respectively adjacent to each of the recess side surfaces. The radial grooves extend in the radial direction along the recess side surfaces, and are separated from the recesses midway through the extension. An inner peripheral surface side end portion of the extension direction of the radial grooves is located between a recess bottom surface and an inner peripheral surface of the semi-split bearing. A groove width and a groove depth of the radial grooves decrease from a position separated from the recess toward the inner peripheral surface side end portion, and become zero at the inner peripheral surface side end portion.

A bearing material may include a matrix of polyamide-imide polymer material, and a solid lubricant particulate. The solid lubricant particulate may have a median particle size of less than 1 micrometre.

To provide a sliding bearing for hardly causing cavitation erosion on the slide surface.SOLUTION: A second half-split bearing has one oil groove and two second inclined face parts on the inner diameter side. The surfaces of the second inclined face parts each include a center region and an edge region. On a boundary between the center region and the edge region, an inflection part is formed. In the center region, a convex curve is formed at the outer diameter side of the second half-split bearing. In the edge region, a convex curve is formed at the inner diameter side. On the surface of the second inclined face part, a plurality of second peripheral grooves are formed neighboring each other. A groove center line is inclined to a vertical line toward a center line passing through the width center of the axial length of the oil groove. A groove inclination angle in the edge region is minimum at the axial end of the second inclined face part, and continuously larger as coming closer to the inflection part. A groove inclination angle in the center region is minimum at a position neighboring the groove end of the second inclined face, and continuously larger as coming closer to the inclination part.SELECTED DRAWING: Figure 7

An assembly of a crankshaft and a connecting rod, the crankshaft being rotatable about a crankshaft axis and comprising a crank pin (5) and a pair of crank webs (6). The connecting rod comprising a big end (10) connected to the crank pin by a big end bearing (11) located between the pair of crank webs and a small end for connecting the connecting rod to a piston. A reservoir (21) for lubricating oil being provided between the big end and the crank pin and a jetting passage (30) being provided for jetting, in use, a piston cooling jet of lubricating oil from the reservoir towards a back face of a piston connected in use to the small end of the connecting rod. The jetting passage comprising two cut-outs, a first cut-out (32) located in a side face (18) of the big end and a second cut-out (33) located in an inwardly-directed side face (19) of the crank web that faces said side face of the big end, the second cut-out defining an outlet (34) of the jetting passage. The first cut-out extends from an inner edge (36) of the side face only part way towards an outer edge (37) of the side face and the second cut-out extends from the outlet at an outer edge (38) of the inwardly-directed side face only part way towards an inner edge (39) of the inwardly-directed side face, such that the jetting passage is established when rotation of the big end about the crank pin overlaps the first cut-out with the second cut-out.

The utility model discloses a modularized crankshaft and an RV speed reducer, and belongs to the field of speed reducers. The shape memory alloy assembly is sleeved outside the central shaft; the first shaft sleeve assembly and the second shaft sleeve assembly are detachably connected outside the shape memory alloy assembly in a sleeving mode, and the first shaft sleeve assembly abuts against the second shaft sleeve assembly. The first shaft sleeve assembly and the second shaft sleeve assembly are the same in structure and each comprise a first shaft sleeve body detachably connected to the outside of the shape memory alloy assembly in a sleeving mode. And the second shaft sleeve body is sleeved outside the first shaft sleeve body. A first flat potential is arranged outside the first shaft sleeve body, a second flat potential is arranged in the second shaft sleeve body, and the first flat potential abuts against the second flat potential. The utility model has the technical effects that the modular performance is good, and the connection performance is good.

A split-type bearing apparatus includes a first half bearing and a second half bearing each including a steel back metal layer and a bearing alloy layer, and only the second half bearing includes a cover layer. A first housing split body is lower in rigidity than a second housing split body. In an unmounted state to a split-type bearing housing, the first half bearing and the second half bearing have the same outside diameters and widths. At symmetric positions with respect to an abutment plane, the back metal layer and the bearing alloy layer of the first half bearing have thicknesses equal to those of the back metal layer and the bearing alloy layer of the second half bearing, respectively.

To provide a bearing device for a crank shaft of an internal combustion engine in which damage hardly occurs even when a close-in phenomenon occurs on a bearing housing during operation.SOLUTION: A bearing device of the present invention includes a crank shaft, a bearing housing, and a slide bearing made of a pair of half-split bearings. Each of the half-split bearings has an inner peripheral face and an outer peripheral face. At least one of the half-split bearings has an oil hole extending by penetrating a wall thickness of the half-split bearing, and a transition face is formed between the outer peripheral face of the half-split bearing and a peripheral edge of an outer peripheral face-side opening. In a non-installed state where the slide bearing is not installed to a bearing holding hole of the bearing housing, the peripheral edge of the outer peripheral face-side opening of the oil hole is positioned on a curvature center side of the outer peripheral face from the outer peripheral face, and a depth of the transition face becomes continuously larger from a position adjacent to the outer peripheral face toward a position adjacent to the peripheral edge of the outer peripheral face-side opening. Also, in an installed state, the outer peripheral face and the transition face of the half-split bearing are in contact with the inner peripheral face of the bearing holding hole with no gap therebetween.SELECTED DRAWING: Figure 7

The objective is to provide an engine ladder frame in which the occurrence of cracks in the frame section is suppressed. [Solution] An engine ladder frame comprising a cast iron crank cap portion and an aluminum alloy frame portion integrally molded with the crank cap portion, wherein the crank cap portion supports a crankshaft and has an arc-shaped support surface concentric with the axis of the crankshaft and includes a first peripheral portion extending in an arc shape concentric with the axis, and the frame portion includes a second peripheral portion extending in an arc shape along the first peripheral portion on the opposite side of the support surface, and the boundary line between the first peripheral portion and the second peripheral portion includes an arc-shaped region extending in an arc shape along the support surface, a first curved region curving from one end of the arc-shaped region in the arc direction to the other end of the arc-shaped region on the opposite side of the support surface, and a second curved region curving from the first curved region to the one end on the opposite side of the support surface.

Provided is an eccentric oscillating gear device (10) capable of reducing a collision sound of a rolling element (50) . The eccentric oscillating gear device (10) includes a crankshaft (14) including an eccentric body (12), an oscillating gear (16) oscillated by the eccentric body (12), and an eccentric bearing (20) disposed between the oscillating gear (16) and the eccentric body (12). The eccentric bearing (20) includes a plurality of rolling elements (50). Some rolling elements (50) adjacent in a circumferential direction of the plurality of rolling elements (50) are in contact with each other. A spacer (62) is disposed between some of the other rolling elements (50) adjacent in the circumferential direction of the plurality of rolling elements (50).

To suppress vibration.SOLUTION: A bearing structure includes a plurality of bearings supporting each of a plurality of journal parts provided in a crank shaft. An inner diameter of at least one of the plurality of bearings is smaller than that of others of the bearings on an extension line of a movement locus of the journal part when the journal part collides with the bearing.SELECTED DRAWING: Figure 4

To reduce friction loss in an internal combustion engine.SOLUTION: An internal combustion engine 1 includes a crank shaft 20 which rotates in combination with reciprocating-motion of pistons 14a-14d within cylinders 12a-12d, bearings 40 supporting the crank shaft 20 with inner peripheral surfaces thereof, and a housing 50 in contact with outer peripheral surfaces of the bearings 40. The bearing 40 has a groove 48 formed in each of axial opposite ends of the outer peripheral surfaces.SELECTED DRAWING: Figure 1

There is provided a half thrust bearing having a constant bearing wall thickness between a slide surface and a back surface, and including an approximately flat center region and two end regions on both circumferential sides of the center region. Each end region extends from each circumferential end of the half thrust bearing toward a circumferential center over a circumferential angle of 5° or more and 35° or less. A reference surface is defined as an imaginary plane which is perpendicular to an axial direction of the half thrust bearing, parallel to the slide surface in the center region, and located away from the slide surface. An axial distance between the slide surface and the reference surface is minimum in the center region, and continuously increases circumferentially from a center region side toward a circumferential end side at any radial position in each end regions.

To provide an overlay material which responds to the temperature environment, and provide a method for manufacturing oil gel capsules and a method for manufacturing a contact part for vehicles, including oil gel capsules.SOLUTION: An oil gel capsule includes an oil gel including an oil and a gelator, and at least one surfactant bonded to the oil gel. Preferably, the oil gel is in a gel state at a temperature less than a phase transition temperature and is in a liquid state at a temperature greater than a phase transition temperature. The oil gel has a phase transition temperature of about 60°C to about 70°C inclusive.SELECTED DRAWING: Figure 1

To provide a bearing device for a crank shaft of an internal combustion engine which is excellent in foreign matter burying property and in a bearing of which seizure hardly occurs.SOLUTION: The outer peripheral face of each half-split bearing in a non-mounted state consists of first and second curved faces (81, 82) formed along the two types of circular arcs different in curvature radius. In a mounted state, the peripheral end faces of the pair of half-split bearings contact each other with no space, and the first curved face and the second curved face of the outer peripheral faces of the pair of half-split bearing contact the inner peripheral face of a bearing holding hole with no space. A third curved face in a region corresponding to the second curved face is displaced to the radial outside, and then a fourth curved face (72) is formed at a position adjacent to each of the peripheral ends of the inner peripheral faces of the pair of half-split bearings. A thickness (T3) of a slide layer is constant over the whole length in the peripheral direction of the half-split bearing or maximum at the peripheral center of the inner peripheral face, and continuously becomes smaller toward the peripheral end of the half-split bearing.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of compressors, in particular to a crankshaft structure for a compressor and the compressor, the crankshaft structure for the compressor comprises a core part, and the hardness of the core part is H1; and an outer peripheral part formed on the outer periphery of the core part, the hardness of the outer peripheral part being H2, the hardness ratio of the hardness H2 of the outer peripheral part to the hardness H1 of the core part being h, 1.95 < h < 2.22 or 5.6 < = h < = 6.2. The crankshaft structure for the compressor and the compressor can solve the problem of how to improve the wear resistance of the matching part of the crankshaft.

The invention provides an eccentric swing type gear device capable of preventing a limiting component from being clamped between a crankshaft bearing and an eccentric part of a crankshaft. An eccentric oscillating gear device is provided with: a crankshaft (14) having an eccentric section (12A); an eccentric bearing (50A) disposed on the eccentric portion (12A); a restricting member (52A) that restricts the movement of the eccentric bearing (50A) in the axial direction and is provided so as to be rotatable relative to the crankshaft (14); a crankshaft bearing (54A) that is disposed on the opposite side of the regulating member (52A) from the eccentric section (12A) in the axial direction and that supports the crankshaft (14); and a positioning part (56A) which is provided separately from the restricting member (52A), and which is in contact with the crankshaft bearing (54A) from the eccentric part (12) side, thereby positioning the crankshaft bearing (54A) in the axial direction with respect to the crankshaft (14).

A bearing element may include an overlay layer which forms a bearing surface against a steel journal or the like. The overlay layer may be formed from a bearing material comprising a polymer matrix of polyamide-imide polymer material, melamine cyanurate particulate, and metal oxide particulate. A method of forming the bearing element comprising the bearing material are also provided.

The present application relates to a kind of intermediate bearing seat, including main body, the main body is provided with crankshaft seat hole, the inside wall of the crankshaft seat hole is provided with annular oil groove, the outer peripheral wall of the main body is provided with oil hole, and the oil groove is communicated with oil hole;Two concaves and two arc-shaped heat dissipation channels are provided on the main body, two concaves are arranged on the upper surface of the main body, two concaves are arranged left and right, two heat dissipation channels are arranged front and back, and the two ends of the heat dissipation channel extend to two concaves respectively, the heat on the main body is discharged by the flow of air in the heat dissipation channel, and the heat dissipation capacity of the main body is improved;The air discharged from nozzle acts on crankshaft, and the heat dissipation capacity of crankshaft is improved;Part of air discharged from nozzle is sent to cooling pipe and then discharged from exhaust pipe, cooling pipe absorbs heat in oil and transfers to air in cooling pipe, thereby realizing the heat dissipation of oil, and avoiding high temperature to affect the viscosity of oil and reduce the lubricating effect.

The utility model relates to the technical field of bearings, and discloses a special bearing for a motorcycle crankshaft, which comprises two sealing covers, an outer cylinder is arranged in the upper sealing cover, a pull block is arranged at the upper part of the outer cylinder, the bottom of the pull block is fixedly connected with a connecting rod, and a spring is arranged outside the connecting rod. A movable plug is fixedly connected to one end of the connecting rod, a sealing plug is fixedly connected to the bottom of the movable plug, mounting assemblies are fixedly connected to the left side and the right side of the exterior of the outer cylinder, a mounting groove is formed in the upper side of the interior of the upper sealing cover, and the mounting assemblies and the outer cylinder are slidably connected to the interior of the mounting groove; the mounting assembly comprises a fixing plate, and a bolt is arranged in the fixing plate. According to the utility model, the bearing can be quickly and conveniently mounted, the working efficiency is improved, dust is prevented from entering the oil injection groove, and the dust is prevented from entering the bearing and adhering to influence the use and shorten the service life.

The utility model provides a precise adjustment mechanism of engine thrust shoe, including: bearing seat and adjusting plate, bearing seat outer side face is fixed connection fixed plate, the fixed plate is provided with the receiving groove, the receiving groove end face passes through the through-hole movable connection adjusting bolt, and the adjusting plate passes through the screw joint adjusting bolt and is connected in the receiving groove in sliding mode, the adjusting plate passes through the through-hole movable connection adjusting bolt, and the adjusting plate passes through the through-hole movable connection adjusting bolt. Meanwhile, fastening bolts are symmetrically connected to the surface of the fixing plate, the lower ends of the fastening bolts are embedded into buffer grooves formed in the adjusting plate, an embedding block is fixedly connected to the end, away from the fixing plate, of the adjusting plate, mounting blocks are symmetrically connected to the two sides of the embedding block, and the mounting blocks are fixedly connected to the outer side face of the thrust shoe body through screws. According to the utility model, the fixed plate, the adjusting bolt, the adjusting plate and the embedding block are matched, so that the distance between the bearing seat and the thrust shoe main body can be accurately and conveniently adjusted, and the distance between the thrust shoe main body and the crankshaft can be adjusted to be within a proper range.

To reduce friction loss in an internal combustion engine.SOLUTION: An internal combustion engine 1 includes a crank shaft 20 which rotates in combination with reciprocating-motion of pistons 14a-14d within cylinders 12a-12d, bearings 40 supporting the crank shaft 20 with inner peripheral surfaces thereof, and a housing 50 in contact with outer peripheral surfaces of the bearings 40. The housing 50 has a groove 55 in each of portions thereof facing to axial opposite ends of outer peripheral surfaces of the bearings 40.SELECTED DRAWING: Figure 1

A sliding member includes a resin overlay layer on a sliding-surface side of a bearing alloy layer. The resin layer includes a resin binder and 20% by volume or more of solid lubricant particles with an anisotropic shape dispersed in the resin binder. The sliding surface is located at 0° and has a virtual axis perpendicular to the sliding surface at 90°. An angle θ is formed by a straight line and a major axis of the particles. The total number of the particles in a observation region is N. A rate R1=N1 / N of the number N1 of first particles at the angle θ of 70°≤θ≤90° from among the particles is 3%≤R1≤20%, and a rate R2=N2 / N of the number N2 of second particles with the angle θ being θ≤20° is 35%≤R2≤65%.

The present invention relates to a lubricating oil composition comprising or being obtained by mixing (i) a base oil, (ii) an overbased calcium-based detergent at a treatment rate that provides the composition with calcium of from 500 to 1300 ppm by weight; (iii) an overbased magnesium-based detergent at a process rate that provides 500 to 1300 ppm by weight of magnesium to the composition; the total weight of the total calcium and magnesium is 1000 to 1800 ppm. The composition has a total sulfate ash content of less than or equal to 1.0 wt%, an elevated temperature high shear viscosity at 150 DEG C of 1.8-2.9 mPa.s, and a total phosphorus content of less than or equal to 0.080 wt%. The composition of the present invention provides a reduction in journal bearing wear from 5% to 60% as measured by maximum average wear in microns using a TE-92 start / stop test method as compared to a lubricating oil composition comparable to HTHS but not comprising a mixture of overbased calcium-based detergent and overbased magnesium-based detergent. A method of reducing journal bearing wear in an internal combustion engine and a method of making a lubricating oil composition are also provided.

To provide a half-split thrust bearing in which a burnout during operation of an internal combustion engine is suppressed.SOLUTION: A half-split thrust bearing includes two oil grooves on a slide surface. A straight line perpendicular to an axial direction of the half-split thrust bearing and passing through a semi-circle center and a circumferential center is defined as a vertical center line, and a straight line perpendicular to the axial direction of the half-split thrust bearing passing through each circumferential end surface is defined as a horizontal center line. The oil grooves extend in parallel with the vertical center line, and opens on an inner peripheral-side edge part and an outer peripheral-side edge part of the half-split thrust bearing. The oil groove includes a groove bottom surface of a constant groove width, a constant bottom surface width, and a constant groove depth. The two oil grooves are arranged away from the vertical center line symmetrically with respect to the vertical center line. In a cross-sectional view vertical to a slide surface and in parallel with the vertical center line, the groove bottom surface of the oil groove is formed of a convex-concave surface having a plurality of projections and a plurality of recesses that continuously project and recess without a flat part, and a ridge line of each convex and a trough line of each concave extend in parallel with the horizontal center line. A difference in height of the convex-concave surface is 5% or more and 20% or less of the groove depth.SELECTED DRAWING: Figure 4

The utility model discloses an engine crankshaft thrust plate with a self-lubricating structure, which belongs to the technical field of crankshaft thrust plates, and comprises a shell base, a plurality of side limiting plates are fixedly mounted in the shell base, a same thrust wafer is slidably mounted between every two adjacent side limiting plates, a connecting slide block is fixedly mounted at the bottom end of each thrust wafer, and the connecting slide blocks are fixedly mounted at the bottom end of each thrust wafer. Two second springs and two second dampers are fixedly installed at the bottom end of the connecting sliding block, the two second springs are arranged on the outer sides of the two second dampers in a sleeving mode, two square strip blocks are fixedly installed at the top end of the shell base, the same connecting pipe is fixedly installed in the square strip blocks and the shell base, and a plurality of small round pipes are integrally formed on the connecting pipe. Through the cooperation of a plurality of structural designs and a lubricating mechanism, the running efficiency and stability of the crankshaft rod in an engine are effectively improved, meanwhile, the reliability and durability of the structure are further enhanced through a buffering and supporting mechanism, the service life of the engine is prolonged, and the performance of the engine is improved.