WO2015076271A1 - 円筒ころ軸受及びトランスミッション用軸受装置 - Google Patents
円筒ころ軸受及びトランスミッション用軸受装置 Download PDFInfo
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- WO2015076271A1 WO2015076271A1 PCT/JP2014/080545 JP2014080545W WO2015076271A1 WO 2015076271 A1 WO2015076271 A1 WO 2015076271A1 JP 2014080545 W JP2014080545 W JP 2014080545W WO 2015076271 A1 WO2015076271 A1 WO 2015076271A1
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- cylindrical roller
- inner ring
- outer ring
- bearing
- race
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/225—Details of the ribs supporting the end of the rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/767—Sealings of ball or roller bearings integral with the race
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0469—Bearings or seals
- F16H57/0471—Bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/46—Gap sizes or clearances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/50—Crowning, e.g. crowning height or crowning radius
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/63—Gears with belts and pulleys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
Definitions
- the present invention relates to a cylindrical roller bearing and a transmission bearing device.
- a ball bearing has a remarkably small torque compared to a tapered roller bearing used under a preload, and is frequently used in a transmission.
- the ball bearing tends to be large in size and may be restricted.
- a cylindrical roller bearing that is used without applying preload as a bearing that supports the gear, and a ball bearing that is used as the other bearing, and receives the thrust load in both directions generated by the meshing of the gear with the ball bearing. May have a support structure that supports only a radial load.
- a configuration as shown in FIG. 4 is known as a configuration for shortening the transmission by shortening the shaft length.
- the engine torque output from the engine ENG is input to the input shaft 101 via the clutch CL, and the gear 102 provided on the input shaft 101 meshes with the gear of the driven shaft (not shown). Then, it is transmitted to the driven shaft.
- the cylindrical roller bearing 1 is used on one side, and the other is used in combination with a slide bearing 103 and a thin thrust needle bearing 104. It becomes possible.
- cylindrical roller bearings those in which the inner side surfaces of the inner ring and the outer ring are inclined and the end surfaces of the cylindrical rollers are crowned have been devised (for example, see Patent Documents 1 and 2).
- the cylindrical roller bearing 1 is configured to receive a thrust load at the time of driving or coasting, and particularly used under high speed rotation like the input shaft 101 and the driven shaft.
- the seizure life is a major issue.
- the inner ring of the cylindrical roller bearing 1 fixed to the input shaft 101 is inclined relative to the outer ring due to the deflection of the input shaft 101 accompanying the thrust load. For this reason, when the outer and inner rings are relatively inclined, a large edge load is generated at both ends of the cylindrical roller.
- lubrication is performed while supplying lubricating oil from the outside, but seizure may occur when the amount of supplied oil is temporarily reduced.
- the cylindrical roller bearings described in Patent Documents 1 and 2 are techniques for preventing the occurrence of edge load and seizure, but are not considered for use in the above-described applications, and further improvements are required.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to suppress the generation of an edge load due to a thrust load and to improve the lubrication state inside the bearing, thereby improving the durability of the cylinder.
- An object of the present invention is to provide a roller bearing and a transmission bearing device capable of realizing a significant downsizing of the transmission.
- An outer ring having an outer ring raceway surface and a pair of outer ring rods provided on both axial sides of the outer ring raceway surface on the inner peripheral surface;
- An inner ring having an inner ring raceway surface and an inner ring rod provided on one axial side of the inner ring raceway surface on the outer peripheral surface;
- a plurality of cylindrical rollers disposed between the outer ring raceway surface and the inner ring raceway surface;
- a cylindrical roller bearing comprising: The radial clearance between the outer ring rod and the inner ring rod is set to 2 mm or less, A cylindrical roller bearing, wherein a radial height of the outer ring rod is greater than a radial height of the inner ring rod.
- the cylindrical roller bearing according to (1) wherein the cylindrical roller has a roller diameter of Da and a roller length of L, and L / Da is 1.2 or more and 1.8 or less.
- the rolling surface of the cylindrical roller is crowned with a single arc having a radius of curvature of 300 to 700 mm,
- the axial central portion is a single arc having a radius of curvature of 3000 to 4000 mm, and the falling amount is changed by a logarithmic curve shape on both side portions of the axial central portion.
- Combined crowning is applied,
- An input shaft or a driven shaft to which engine torque is input is rotatably supported by at least a plain bearing and the cylindrical roller bearing according to any one of (1) to (4),
- the cylindrical roller bearing supports a thrust load in one side direction and allows a relative inclination between the outer ring and the inner ring.
- the lubricating oil is supplied from an opening between the outer ring and the inner ring on the side opposite to the side where the inner ring collar is provided with respect to the cylindrical roller. Bearing device for transmission.
- the cylindrical roller bearing of the present invention since the radial height of the outer ring rod is larger than the radial height of the inner ring rod, when the relative inclination occurs in the outer ring and the inner ring, the cylindrical roller has a height Since the outer ring rod having a large diameter is stably held on the outer ring raceway surface, the occurrence of edge load can be suppressed. Also, since the radial clearance between the outer ring rod and the inner ring rod is set to 2 mm or less, even if the amount of oil supplied temporarily decreases, some of the lubricating oil remaining inside the bearing The occurrence of image sticking can be suppressed due to the influence.
- the input shaft or the driven shaft to which engine torque is input is rotatably supported by the slide bearing and the above-described cylindrical roller bearing. Since the thrust load is supported and the relative inclination of the outer ring and the inner ring is allowed, the transmission can be significantly reduced in size.
- the cylindrical roller bearing of the present embodiment is used for a transmission 100 having an input shaft 101 or a driven shaft to which engine torque is input as shown in FIG. 4, and the input shaft 101 or the driven shaft is The maximum rotation speed rotates at the same rotation speed as the engine (maximum 7500 rpm).
- the radial load acting on the input shaft 101 is received by the cylindrical roller bearing 1 and the slide bearing 103, and the thrust load (axial load) generated by the meshing of the input gear in the coast state (during engine braking) is received by a thrust needle bearing 104.
- other bearings such as a shell-type cylindrical roller bearing and a ball bearing may be applied to the slide bearing 103 and the thrust needle bearing 104 instead.
- the thrust load acting in the opposite direction during driving may be supported by a ball bearing or the like instead of the thrust needle bearing.
- the radial load may be received by a slide bearing or a shell type cylindrical roller bearing.
- the cylindrical roller bearing 1 of the present embodiment applied to the transmission 100 has a pair of outer ring raceway surfaces 11 provided on the inner peripheral surface and both sides of the outer ring raceway surface 11 in the axial direction.
- An outer ring 10 having an outer ring rod 12, an inner ring 20 having an inner ring raceway surface 21 and an inner ring rod 22 provided on one side in the axial direction of the inner ring raceway surface 21, and an outer ring raceway surface 11.
- a plurality of cylindrical rollers 30 disposed between the inner ring raceway surface 21 and an outer ring guide type retainer 40 having a plurality of pockets 41 for holding the cylindrical rollers 30 at a predetermined interval.
- the cylindrical roller bearing 1 is provided with outer ring rods 12 at both axial ends of the outer ring 10 and inner ring rods 22 at one axial end of the inner ring 20, and only in one side direction in the transmission as shown in FIG.
- the thrust load can be supported.
- the inner ring 20 of the cylindrical roller bearing 1 fixed to the input shaft is inclined relative to the outer ring 10 due to the influence of the deflection of the input shaft accompanying the thrust load and the component accuracy.
- the rolling surface 32 of the cylindrical roller 30 (the surface in rolling contact with the outer ring raceway surface 11 and the inner ring raceway surface 21) is crowned.
- the crowning on the rolling surface 32 may be formed by a single arc having a radius of curvature of 300 to 700 mm. Alternatively, as shown in FIG.
- the axial central portion 32a of the rolling surface 32 is formed as a single arc having a radius of curvature of 3000 to 4000 mm, and both axial side portions 32b of the central portion 32a. It may be a composite crowning in which the amount of fall is changed abruptly by a logarithmic curve shape.
- the central portion 32a formed of a single arc has an axial length of about 40 to 50% of the roller length L, and the amount of drop at the end of the rolling surface 32 is 0 of the roller diameter Da. About 2 to 0.5%.
- Such a composite crowning is capable of reducing the maximum contact surface pressure compared to a single circular arc crowning, so that the bearing life can be extended. Furthermore, since the sitting of the cylindrical roller 30 is improved, the skew of the cylindrical roller 30 is reduced and heat generation can be suppressed.
- the cylindrical roller 30 may be easily tilted to be seized. In order to suppress this, the outer ring rod 12 and the inner ring rod are suppressed.
- the inner surfaces (contact surfaces) 13 and 23 of the 22 cylindrical rollers 30 are inclined at an angle ⁇ of 10 ′ to 30 ′ with respect to the radial direction. Further, the axial end surface 31 of the cylindrical roller 30 is crowned.
- the bearing width W is set to 3.0 or more in terms of the D / W value with respect to the bearing outer diameter D.
- the relationship L / Da between the roller diameter Da and the roller length L is set as follows. It is set to 1.2 or more and 1.8 or less.
- the lubricating oil is supplied from the outside, and the lubricating oil is the outer ring 10 and the inner ring on the opposite side in the axial direction to the cylindrical roller 30. 20, the opening area into the bearing is increased, and a sufficient amount of lubricating oil can be supplied to the outer ring rod 12 and the inner ring rod 22. Since the lubricating oil moving in the axial direction lubricates the inner ring rod 22 and the lubricating oil moving in the outer diameter direction by centrifugal force lubricates the outer ring rod 12, the lubrication state inside the cylindrical roller bearing 1 is improved. Can keep.
- the radial clearance C existing between the outer ring rod 12 and the inner ring rod 22 is 2 mm or less, preferably 1.5 mm or less, so that the amount of oil supplied temporarily Even in the case of a decrease, the occurrence of seizure can be suppressed due to the influence of a part of the lubricating oil remaining inside the bearing.
- the radial height A of the outer ring rod 12 is larger than the radial height B of the inner ring rod 22 (A> B).
- the inclination angle of the inner side surface 23 of the inner ring rod 22 may be larger than the inclination angle of the inner side surface 13 of the outer ring rod 12.
- the cage 40 is an outer ring guide system, the gap between the inner diameter of the outer ring rod 12 and the outer diameter surfaces at both ends of the cage 40 is reduced. As a result, the lubricating oil flowing in from the inner diameter side of the cage 40 lubricates the outer ring rod 12 without flowing out to the external space, and the cage 40 is guided by the outer ring rod 12 and rotates stably even at high speeds. I can do things.
- the outer ring raceway surface 11 and the pair of outer ring rods 12 provided on both axial sides of the outer ring raceway surface 11 are provided on the inner peripheral surface.
- the outer ring rod 12 having a large diameter is stably held on the outer ring raceway surface 11, the occurrence of edge load can be suppressed. Further, since the radial clearance C between the outer ring rod 12 and the inner ring rod 22 is set to 2 mm or less, even if the amount of oil supplied temporarily decreases, a part of the residual bearing inside the bearing The occurrence of seizure can be suppressed by the influence of the lubricating oil.
- the rolling surface 32 of the cylindrical roller 30 is crowned with a single arc having a curvature radius of 300 to 700 mm, or the axial central portion 32a is a single arc having a curvature radius of 3000 to 4000 mm.
- a composite crowning is performed in which both side portions 32b of the central portion 32a have a logarithmic curve shape so that the amount of fall is changed.
- the contact surfaces of the outer ring rod 12 and the inner ring rod 22 with the cylindrical roller 30 are formed with inclinations of 10 'to 30'. Therefore, even when the relative inclination between the outer ring 10 and the inner ring 20 occurs, the occurrence of edge load can be suppressed, and the seizure can be suppressed even when the cylindrical roller 30 is tilted.
- the input shaft 101 or the driven shaft to which engine torque is input is rotatably supported by at least the slide bearing 103 and the cylindrical roller bearing 1 described above, and the cylindrical roller bearing. 1 supports a thrust load in one direction and allows a relative inclination between the outer ring 10 and the inner ring 20, so that the transmission 100 can be significantly reduced in size.
- lubricating oil is supplied from the opening 50 between the outer ring 10 and the inner ring 20 on the side opposite to the side where the inner ring collar 22 is provided with respect to the cylindrical roller 30, the opening area into the bearing is increased. A sufficient amount of lubricating oil can be supplied to the outer ring rod 12 and the inner ring rod 22.
- the effect was confirmed by performing a verification experiment while changing the shape of the rolling surface 32 of the cylindrical roller 30.
- the verification experiment was performed under the following conditions, and the target life was 120 Hrs.
- Verification experiment conditions ⁇ Load: 0.4C (C: Basic dynamic load rating) ⁇ Rotation speed: 3000rpm ⁇ Lubrication condition: ATF, 120 °C, oil bath ⁇ Foreign matter: 0.05 g / L (foreign matter size: 10-50 ⁇ m, iron-based) ⁇ Inclination: 0 rad (no inclination), 3/1000 rad (with inclination)
- Table 1 shows the experimental results in the case of using the cylindrical roller 30 in which the rolling surface 32 is crowned with a single arc. As can be seen from Table 1, it was confirmed that when the radius of curvature is 300 to 700 mm, the target life is cleared even if there is a relative inclination between the cylindrical roller 30 and the raceway surface. On the other hand, when the radius of curvature was 200 mm, the life did not decrease even if there was an inclination, but the target life was not reached because the contact surface pressure was high. Further, when the radius of curvature is 800 mm, the target life could not be cleared if there is an inclination.
- Table 2 shows experimental results in the case of using the cylindrical roller 30 in which the axial center portion 32a of the rolling surface 32 is a single circular arc and the axial end portions 32b are changed in drop amount by a logarithmic curve shape. ing.
- the radius of curvature of the axial central portion 32a is a single arc of 3000 to 4000 mm, the axial length of the axial central portion 32a with respect to the roller length L of the cylindrical roller 30 and the cylindrical roller diameter Da. It was confirmed that the target life was cleared within the range where the falling amount of the end portion was regulated as shown in Table 2. On the other hand, in the case of the rolling surface 32 outside the above range, the target life could not be cleared in both the state of no tilt and the state of tilt.
- this invention is not limited to each embodiment mentioned above, A deformation
- the cylindrical roller bearing of this invention was demonstrated as what is applied to a transmission, it is not limited to this, You may apply to another apparatus.
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Abstract
Description
(1) 内周面に、外輪軌道面と、該外輪軌道面の軸方向両側に設けられた一対の外輪鍔と、を有する外輪と、
外周面に、内輪軌道面と、該内輪軌道面の軸方向片側に設けられた内輪鍔と、を有する内輪と、
前記外輪軌道面と前記内輪軌道面との間に配置された複数の円筒ころと、
を備えた円筒ころ軸受であって、
前記外輪鍔と前記内輪鍔との間の径方向隙間は、2mm以下に設定され、
前記外輪鍔の径方向高さは、前記内輪鍔の径方向高さよりも大きいことを特徴とする円筒ころ軸受。
(2) 軸受幅をW、軸受外径をDとすると、D/Wは、3.0以上であり、
前記円筒ころのころ径をDa、ころ長さをLとすると、L/Daは、1.2以上1.8以下であることを特徴とする(1)に記載の円筒ころ軸受。
(3) 前記円筒ころの転動面には、曲率半径が300~700mmの単一円弧からなるクラウニングが施され、
前記外輪鍔及び前記内輪鍔の前記円筒ころとの接触面には、10′~30′の傾斜が形成されていることを特徴とする(1)又は(2)に記載の円筒ころ軸受。
(4) 前記円筒ころの転動面には、その軸方向中央部分を曲率半径が3000~4000mmの単一円弧とし、該軸方向中央部分の両側部分を対数曲線形状によって落ち量を変化させるようにした複合クラウニングが施され、
前記外輪鍔及び前記内輪鍔の前記円筒ころとの接触面には、10′~30′の傾斜が形成されていることを特徴とする(1)又は(2)に記載の円筒ころ軸受。
(5) エンジントルクが入力される入力軸又は従動軸が、少なくともすべり軸受と(1)~(4)のいずれかに記載の円筒ころ軸受とによって回転自在に支持され、
前記円筒ころ軸受は、片側方向のスラスト荷重を支承すると共に、前記外輪と前記内輪の相対傾きを許容することを特徴とするトランスミッション用軸受装置。
(6) 前記円筒ころに対して前記内輪鍔が設けられる側と反対側における、前記外輪と前記内輪との間の開口部から潤滑油が供給されることを特徴とする(5)に記載のトランスミッション用軸受装置。
転動面32におけるクラウニングは、曲率半径が300~700mmの単一円弧によって形成されてもよい。または、図2に示すように、転動面32におけるクラウニングは、転動面32の軸方向中央部32aを曲率半径が3000~4000mmの単一円弧とし、該中央部32aの軸方向両側部分32bを対数曲線形状によって落ち量を急激に変化させるようにした複合クラウニングであってもよい。
なお、複合クラウニングの場合、単一円弧からなる中央部32aは、ころ長さLの40~50%程度の軸方向長さとし、転動面32の端部での落ち量はころ径Daの0.2~0.5%程度としている。
さらに、円筒ころ30の軸方向端面31には、クラウニングが施されている。
これにより、外輪10及び内輪20に相対的な傾きが発生した場合、円筒ころ30は、高さが大きい外輪10の両外輪鍔12により外輪軌道面11に安定して保持される為、エッジロードの発生が抑制される。内輪鍔22の内側面23の傾斜角度を大きくすれば、内輪20と円筒ころ30とが相対的に傾いた場合でも、エッジロードが発生する事を抑制できる。
・ 荷重:0.4C (C:基本動定格荷重)
・ 回転数:3000rpm
・ 潤滑条件:ATF,120℃,油浴
・ 異物:0.05g/L (異物サイズ:10~50μm,鉄系)
・ 傾き:0rad(傾きなし), 3/1000rad(傾きあり)
上記実施形態では、本発明の円筒ころ軸受は、トランスミッションに適用されるものとして説明されたが、これに限定されるものでなく、他の装置に適用されてもよい。
10 外輪
12 外輪鍔
13 内側面(接触面)
20 内輪
22 内輪鍔
23 内側面(接触面)
30 円筒ころ
32 転動面
D 軸受外径
Da ころ径
L ころ長さ
W 軸受幅
Claims (6)
- 内周面に、外輪軌道面と、該外輪軌道面の軸方向両側に設けられた一対の外輪鍔と、を有する外輪と、
外周面に、内輪軌道面と、該内輪軌道面の軸方向片側に設けられた内輪鍔と、を有する内輪と、
前記外輪軌道面と前記内輪軌道面との間に配置された複数の円筒ころと、
を備えた円筒ころ軸受であって、
前記外輪鍔と前記内輪鍔との間の径方向隙間は、2mm以下に設定され、
前記外輪鍔の径方向高さは、前記内輪鍔の径方向高さよりも大きいことを特徴とする円筒ころ軸受。 - 軸受幅をW、軸受外径をDとすると、D/Wは、3.0以上であり、
前記円筒ころのころ径をDa、ころ長さをLとすると、L/Daは、1.2以上1.8以下であることを特徴とする請求項1に記載の円筒ころ軸受。 - 前記円筒ころの転動面には、曲率半径が300~700mmの単一円弧からなるクラウニングが施され、
前記外輪鍔及び前記内輪鍔の前記円筒ころとの接触面には、10′~30′の傾斜が形成されていることを特徴とする請求項1又は2に記載の円筒ころ軸受。 - 前記円筒ころの転動面には、その軸方向中央部分を曲率半径が3000~4000mmの単一円弧とし、該軸方向中央部分の両側部分を対数曲線形状によって落ち量を変化させるようにした複合クラウニングが施され、
前記外輪鍔及び前記内輪鍔の前記円筒ころとの接触面には、10′~30′の傾斜が形成されていることを特徴とする請求項1又は2に記載の円筒ころ軸受。 - エンジントルクが入力される入力軸又は従動軸が、少なくともすべり軸受と請求項1~4のいずれか1項に記載の円筒ころ軸受とによって回転自在に支持され、
前記円筒ころ軸受は、片側方向のスラスト荷重を支承すると共に、前記外輪と前記内輪の相対傾きを許容することを特徴とするトランスミッション用軸受装置。 - 前記円筒ころに対して前記内輪鍔が設けられる側と反対側における、前記外輪と前記内輪との間の開口部から潤滑油が供給されることを特徴とする請求項5に記載のトランスミッション用軸受装置。
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KR1020167013343A KR20160074626A (ko) | 2013-11-21 | 2014-11-18 | 원통 롤러 베어링 및 트랜스미션용 베어링 장치 |
US15/038,275 US20160298677A1 (en) | 2013-11-21 | 2014-11-18 | Cylindrical roller bearing and transmission bearing device |
JP2015549161A JPWO2015076271A1 (ja) | 2013-11-21 | 2014-11-18 | 円筒ころ軸受及びトランスミッション用軸受装置 |
EP14864315.8A EP3073138A4 (en) | 2013-11-21 | 2014-11-18 | CYLINDER ROLLER BEARING AND BEARING DEVICE FOR TRANSMISSION |
CN201480063771.3A CN105992882A (zh) | 2013-11-21 | 2014-11-18 | 圆筒滚子轴承和变速器用轴承装置 |
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EP (1) | EP3073138A4 (ja) |
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JP6323136B2 (ja) * | 2014-04-16 | 2018-05-16 | 株式会社ジェイテクト | ころ軸受用軌道輪、ころ軸受及び動力伝達装置 |
WO2018153442A1 (en) | 2017-02-22 | 2018-08-30 | Volvo Truck Corporation | A bearing arrangement and an assembly comprising such bearing arrangement |
WO2019179581A1 (de) * | 2018-03-23 | 2019-09-26 | Schaeffler Technologies AG & Co. KG | Zylinderrollenlager und fest-loslageranordnung mit einem zylinderrollenlager |
CN110608883B (zh) * | 2019-10-25 | 2024-05-28 | 西南交通大学 | 一种多类型轴承损伤模拟试验系统 |
DE102019220284A1 (de) * | 2019-12-19 | 2021-06-24 | Aktiebolaget Skf | Wälzlager mit Drahtlaufringen |
DE102019220292A1 (de) * | 2019-12-19 | 2021-06-24 | Aktiebolaget Skf | Wälzlager mit Drahtlaufringen und Halterippe |
CN111503156A (zh) * | 2020-03-27 | 2020-08-07 | 人本集团有限公司 | 一种圆柱滚子轴承 |
CN111765237B (zh) * | 2020-09-03 | 2020-12-22 | 盛瑞传动股份有限公司 | 用于变速器的输出轴支撑装置 |
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EP3073138A4 (en) | 2016-11-16 |
EP3073138A1 (en) | 2016-09-28 |
JPWO2015076271A1 (ja) | 2017-03-16 |
US20160298677A1 (en) | 2016-10-13 |
CN105992882A (zh) | 2016-10-05 |
KR20160074626A (ko) | 2016-06-28 |
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