WO2009139217A1 - 回転軸の軸受潤滑構造 - Google Patents
回転軸の軸受潤滑構造 Download PDFInfo
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- WO2009139217A1 WO2009139217A1 PCT/JP2009/054471 JP2009054471W WO2009139217A1 WO 2009139217 A1 WO2009139217 A1 WO 2009139217A1 JP 2009054471 W JP2009054471 W JP 2009054471W WO 2009139217 A1 WO2009139217 A1 WO 2009139217A1
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- WIPO (PCT)
- Prior art keywords
- lubricating oil
- pair
- bearings
- oil
- separator
- Prior art date
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Classifications
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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
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/56—Systems consisting of a plurality of bearings with rolling friction in which the rolling bodies of one bearing differ in diameter from those of another
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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
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
- F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
- F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
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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
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
- F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
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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
- F16C19/34—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 both radial and axial load
- F16C19/36—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 both radial and axial load with a single row of rollers
- F16C19/364—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 both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
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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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
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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
- F16H57/0409—Features relating to lubrication or cooling or heating characterised by the problem to increase efficiency, e.g. by reducing splash losses
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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
Definitions
- the present invention relates to a bearing lubrication structure of a rotating shaft, and in particular, when the lubricating oil adheres directly to the rotating shaft or excessive lubricating oil is supplied to the bearing, the rotating shaft is driven by the viscous resistance or shear resistance of the lubricating oil.
- the present invention relates to a technique for suppressing the occurrence of power loss and impairing power transmission efficiency.
- the lubricating oil scraped up by the ring gear is guided to the oil supply port and flows into the annular space surrounded by the pair of bearings on the outer peripheral side of the shaft of the drive pinion. These bearings are lubricated and cooled by passing through and being discharged to the outside.
- the lubricating oil supplied between the pair of bearings from the oil supply port is a rotating shaft or a member (such as a spacer) that rotates integrally with the rotating shaft. Since the oil adheres directly to the outer peripheral surface of the oil and is stirred or stirred, there is a problem in that power loss occurs in the rotating shaft due to viscosity resistance and shear resistance due to the stirring of the lubricating oil, and power transmission efficiency is impaired. .
- the lubricating oil supplied to the oil supply port is supplied to the bearing as it is and used for lubrication and cooling, excess lubricating oil in excess of the amount required for lubrication and cooling may be passed through the bearing. Power loss increases due to the viscous resistance and shear resistance of the lubricating oil, and power transmission efficiency is impaired.
- the lubricating oil is sucked into the bearing and discharged to the outside by the pumping action that occurs based on the change in the diameter of the tapered roller, and the amount of oil that passes through the pumping action depends on the rotational speed.
- the amount of lubricating oil required for lubrication and cooling increases as the number of revolutions increases, but the rate of increase in the amount of penetrating oil is greater than the rate of increase in required oil.
- a large amount of lubricating oil is allowed to pass through the bearing, and a large power loss occurs due to the viscous resistance of the lubricating oil.
- the present invention has been made in the background of the above circumstances, and the object of the present invention is that the lubricating oil adheres directly to the rotating shaft or the lubricating oil more than necessary is supplied to the bearing, thereby
- the purpose is to prevent power loss from occurring in the rotating shaft due to viscous resistance and shear resistance, and impairing power transmission efficiency.
- the present invention provides: (a) a pair of bearings that are disposed in an axially separated manner in the eaves support case and that support a predetermined rotation shaft so as to be rotatable about an axis; (b) In a bearing lubrication structure for a rotary shaft, which has an oil supply port provided in the support case for supplying lubricating oil for lubricating the pair of bearings between the pair of bearings, (c) Between the pair of bearings, a separator for receiving the lubricating oil supplied from the oil supply port is integrally disposed in the support case, and (d) ⁇ ⁇ at both ends of the separator, the support A pair of side walls protruding toward the inner peripheral surface of the case and brought into close contact with the pair of bearings are provided, and (e) a lubricating oil supplied from the oil supply port is provided on the pair of side walls. Oil is given to the pair of bearings. A communication hole that allows the flow-out at a flow rate
- a bearing lubrication structure for a rotating shaft wherein (a) the separator is a cylindrical oil receiving portion disposed substantially concentrically with the rotating shaft on the outer peripheral side of the rotating shaft; There are a pair of annular side walls provided so as to extend from both ends of the oil receiving portion to the outer peripheral side, closely contacted with the cylindrical inner peripheral surface of the support case, and facing the pair of bearings. (B) The plurality of communication holes provided in the pair of side walls are provided at equiangular intervals around the center line of the oil receiving portion.
- a separator is disposed between a pair of bearings, and the lubricating oil supplied from the oil supply port is received by the separator, so that the rotating shaft or the rotating shaft is integrated.
- Lubricating oil directly adheres to rotating members (such as spacers), reducing power loss caused by rotation or stirring.
- the lubricating oil received by the separator is supplied to the pair of bearings at a predetermined flow rate from the communication holes in the side walls provided at both ends of the separator, and is used for lubrication and cooling of the bearing. The large amount of power loss caused by viscous resistance, shear resistance, etc. is suppressed by supplying the lubricating oil.
- the separator according to the second aspect of the invention is provided with a cylindrical oil receiving portion disposed substantially concentrically on the outer peripheral side of the rotating shaft, and provided so as to extend from the both ends of the oil receiving portion to the outer peripheral side.
- a pair of annular side walls that are brought into close contact with the inner circumferential surface of the cylinder and faced with a pair of bearings, and each of the pair of side walls includes a plurality of equiangular intervals around the center line of the oil receiving portion. Since the communication hole is provided, it is not necessary to consider the phase around the center line when the support hole is disposed in the support case, and it can be easily assembled integrally with the support case by press-fitting or the like at an arbitrary phase.
- FIG. 2 is a cross-sectional view showing a bearing lubrication structure of a drive pinion to which the present invention is applied in the final reduction gear of the power transmission system of FIG. 1. It is a figure which shows the separator of FIG. 2 independently, and is a figure which shows the upper half from the centerline S, (a) is a left side view, (b) is a sectional view cut in parallel with the centerline S, (c) Is a right side view.
- FIG. 3 is a diagram for explaining the relationship between the amount of oil penetrating oil passing through the bearing of FIG.
- the bearing lubrication structure of the rotating shaft according to the present invention is, for example, a lubricating structure for a bearing that rotatably supports a drive pinion (small gear) that transmits rotation from a propeller shaft of a vehicle to a ring gear (large gear) of a differential device.
- a drive pinion small gear
- a ring gear large gear
- it can also be applied to a bearing lubrication structure of a rotating shaft in other parts of a vehicle power transmission path, or can be applied to a bearing lubricating structure of various rotating shafts other than for a vehicle. It is.
- the rotating shaft is arranged in a substantially horizontal posture, and the oil supply port is provided above the rotating shaft in the vertical direction so that the lubricating oil flows down, for example, by gravity and is supplied between the pair of bearings. Although desirable, it may be provided obliquely upward, and a plurality of oil supply ports may be provided.
- an oil supply port is provided at the side of the same height as the rotating shaft, and the lubricating oil is supplied into the support case from the side. You may make it.
- Lubricating oil can be supplied to the oil supply port by using, for example, scraping with a ring gear of a differential device or scraping with other gears, etc. Embodiments are possible.
- the pair of bearings that support the rotating shaft various types of bearings such as a tapered roller bearing, a cylindrical roller bearing, and a ball bearing can be adopted depending on the type of the rotating shaft.
- a tapered roller bearing the lubricating oil is sucked into the bearing and discharged to the outside by the pumping action that occurs based on the difference in the diameter of the tapered roller, and the amount of oil penetrating the bearing by this pumping action depends on the rotational speed.
- the amount of lubricating oil required for lubrication and cooling increases as the number of revolutions increases, but in general, the rate of increase in the through oil amount is larger than the rate of increase in the required oil amount, which is more than necessary at high revolutions.
- the lubricating oil suction action by the pump action is not particularly obtained, it is lubricated and cooled by the lubricating oil supplied from the separator communicating hole, so the position and number of the communicating holes, Viscosity resistance of the lubricating oil by appropriately setting the size and limiting the amount of oil supplied so that the smallest possible amount of lubricating oil is supplied to the bearing while ensuring the minimum lubricating oil required for lubrication and cooling. It is the same as that of the tapered roller bearing that power loss due to the above or the like can be suppressed, or the supply position and supply oil amount can be individually set for the pair of bearings.
- the double row ball bearing can also obtain the lubricating oil suction action by the same pump action as the tapered roller.
- the position of the communication hole that is, the supply position of the lubricating oil to the bearing is the non-rotating side where the power loss due to the viscous resistance or shear resistance due to the supply of the lubricating oil is relatively small, that is, the outer ring side fixed integrally to the support case It is desirable to provide in. Specifically, it is desirable to set the position of the communication hole so that the lubricating oil is supplied to the portion between the cage that holds the rolling elements and the outer ring. However, the lubricating oil may be supplied to the rotating side, that is, the inner ring side.
- the separator is provided with a cylindrical oil receiving portion disposed substantially concentrically on the outer peripheral side of the rotating shaft, and provided so as to extend from both ends of the oil receiving portion to the outer peripheral side. It has a pair of annular side walls that are brought into close contact with the cylindrical inner peripheral surface of the case, and is configured to form an annular cylindrical oil reservoir by the separator and the inner peripheral surface of the support case. Desirably, for example, a semi-cylindrical oil receiver that covers only the upper half of the rotating shaft, and a fan-shaped oil receiver that extends from both axial ends of the oil receiver to the outer periphery.
- a separator having the shape May be by the inner peripheral surface of the lifting casing configured to form an oil reservoir portion of the semi-annular tubular shape.
- the angle range of the separator around the axis of the rotating shaft can be any angle other than the entire circumference or half circumference as described above, and various modes are possible.
- the lubricating oil supplied from the oil supply port is received by the separator to prevent it from adhering directly to the rotating shaft and the like, and the lubricating oil is formed between the separator and the support case. It is sufficient that the oil is directly supplied to the bearing at a predetermined flow rate from the communication hole provided in the side wall while being held in the oil reservoir.
- the separator can be integrally formed by, for example, pressing a metal cylinder or flat plate, etc., but the cylindrical oil receiving portion and the side wall are formed separately and integrated by welding or the like.
- Various modes are possible, such as being fixed to
- the separator is easy to press the separator so that the outer peripheral portion of the side wall is in close contact with the cylindrical inner peripheral surface of the support case, and to fix the separator integrally.
- the separator is fixed integrally by fastening means such as bolts or welding.
- fastening means such as bolts or welding.
- Various modes are possible, such as a non-detachable attachment using a snap ring or the like.
- a pair of cylindrical or semi-cylindrical folded portions are formed by drawing or the like so as to extend inward from the outer peripheral edges of the side walls on both sides in the axial direction. If it is provided with a predetermined length and press-fitted so that the folded portion is in close contact with the support case, a predetermined fixing strength can be obtained easily and stably.
- the communication hole provided on the side wall is preferably a circular hole, but various shapes such as an elliptical shape, an oval shape, a quadrangular shape, and a slit shape can be employed.
- a plurality of communication holes are provided at equiangular intervals around the center line of an arc such as a cylinder or a semi-cylinder of the oil receiving portion of the separator, but may be provided at unequal intervals.
- the number, size, shape, interval, etc. of the communication holes provided in the side walls on both sides may be different.
- FIG. 1 is a diagram illustrating a power transmission mechanism of a front engine rear wheel drive (FR) type vehicle 10 having a final reduction gear device 20 having a bearing lubrication structure to which the present invention is applied.
- a vehicle 10 includes an engine 12 as a power source, a pair of left and right front wheels 14L and 14R, an automatic transmission 16 for shifting the output rotation of the engine 12, and an automatic transmission 16
- a propeller shaft 18 for transmitting the driving force output from the output shaft, a final reduction gear 20 that functions as a rear wheel driving force distribution device, and a transmission force distributed by the final reduction gear 20.
- a pair of left and right rear wheel axles 22L and 22R and a pair of left and right rear wheels 24L and 24R to which driving force is transmitted via the rear wheel axles 22L and 22R are provided.
- FIG. 2 is a cross-sectional view showing a part of the final reduction gear 20.
- the drive pinion 30 is integrally connected to the propeller shaft 18 and is driven to rotate around the axis O, and the meshing teeth of the drive pinion 30.
- a hypoid gear includes a differential device 34 having a ring gear 32 that meshes with 30t and is driven to rotate, and power is distributed to the left and right rear wheel axles 22L and 22R by the differential device 34.
- the drive pinion 30 corresponds to a predetermined rotation axis, and can rotate around the axis O through a pair of bearings 38 and 40 in the support case 36 in a substantially horizontal posture in which the axis O is in the longitudinal direction of the vehicle.
- the support case 36 is integrally fixed to a frame of the vehicle body via a differential housing (not shown).
- the drive pinion 30 and the bearing structure are configured symmetrically around the axis O, and the lower half of the axis O is omitted in FIG.
- the pair of bearings 38 and 40 are tapered roller bearings having tapered rollers 38r and 40r, respectively.
- the pair of bearings 38 and 40 are spaced apart in the axial direction in the support case 36 and separated in the axial direction of the stepped shaft 42 of the drive pinion 30. These two locations are supported rotatably.
- the bearings 38 and 40 are both arranged in such a posture that the large diameter side of the tapered rollers 38r and 40r is outside in the axial direction, and the bearing 38 on the side close to the meshing teeth 30t of the drive pinion 30 is the other bearing 40.
- the pitch diameter of the tapered roller 38r is larger than the pitch diameter of the tapered roller 40r.
- a portion of the support case 36 that is directly above the axis O in the vertical direction and is positioned between the bearings 38 and 40 in the axial direction of the drive pinion 30 is used.
- a single oil supply port 44 is provided, and a part of the lubricating oil scraped up by the rotation of the ring gear 32 is introduced into the oil supply port 44.
- a cylindrical separator 46 that receives the lubricating oil supplied from the oil supply port 44 is integrally disposed in the support case 36 between the pair of bearings 38 and 40 so as to be substantially concentric with the shaft center O. Yes.
- FIG. 3 is a view showing the separator 46 alone.
- the separator 46 is a cylindrical oil receiving portion disposed substantially concentrically with the stepped shaft 42 on the outer peripheral side of the stepped shaft 42 of the drive pinion 30. 47 and the both ends of the oil receiving portion 47 in the axial direction extend to the outer peripheral side substantially at right angles to the center line S, and are brought into close contact with the cylindrical inner peripheral surface of the support case 36 and a pair of bearings 38, 40.
- a pair of annular side walls 48, 50 that face each other are integrally provided, and an annular cylindrical oil reservoir 60 is formed by the separator 46 and the inner peripheral surface of the support case 36.
- the pair of side walls 48 and 50 are provided with a plurality of communication holes 52 and 54, respectively, and the lubricating oil supplied from the oil supply port 44 is stored in the oil reservoir 60, and these communication holes are also provided. It is made to flow out to the bearings 38 and 40 side from the 52 and 54 at a predetermined flow rate.
- the separator 46 has an axial length that is substantially the same as the distance between the pair of bearings 38 and 40, and the side walls 48 and 50 are located close to the ends of the bearings 38 and 40, respectively.
- Lubricating oil that has flowed out of the holes 52 and 54 is well distributed to the rolling elements of the bearings 38 and 40, that is, the tapered rollers 38r and 40r.
- FIG. 2 indicate the flow of the lubricating oil supplied to the pair of bearings 38 and 40 through the oil reservoir 60 by the lubricating oil supplied to the oil supply port 44.
- FIG. 3 are views showing the upper half of the center line S of the separator 46 (substantially the same as the axis O in the arrangement state on the support case 36), and (a) is a side wall. 48 is a left side view seen from the side 48, (b) is a cross-sectional view parallel to the center line S corresponding to FIG. 2, and (c) is a right side view seen from the side wall 50 side.
- the lubricating oil is sucked into the bearings 38 and 40 by the pump action generated based on the difference in diameter of the tapered rollers 38r and 40r and discharged to the outside.
- the amount of penetrating oil flowing through the bearings 38 and 40 by this pumping action depends on the rotational speed, and increases as the rotational speed increases as shown in FIG. It will be more. 4 (a) represents the amount of penetrating oil when a sufficient amount of lubricating oil is supplied to the small diameter side of the tapered rollers 38r and 40r, that is, when the small diameter side is buried in the lubricating oil.
- the amount of lubricating oil required for lubrication and cooling increases as the rotational speed increases, but in general, the rate of increase in the through oil amount is greater than the rate of increase in the required oil amount, and there is no limit to the amount of oil supplied. For example, a large amount of lubricating oil more than necessary is allowed to flow through the bearings 38 and 40 during high rotation, and a large power loss occurs due to the viscous resistance and shear resistance of the lubricating oil.
- the separator 46 having the cylindrical oil receiving portion 47 and the pair of side walls 48 and 50 is disposed, and the amount of lubricating oil supplied to the bearings 38 and 40 is limited.
- the position and number of communication holes 52 and 54 provided in the side walls 48 and 50 so that as little lubricant as possible is supplied from the separator 46 to the bearings 38 and 40 while ensuring the minimum lubricating oil necessary for lubrication and cooling.
- the bearing 38 and the bearing 38 are optimized so that the lubricating oil supply position and amount are optimized.
- the size of the side walls 48, 50 and the position, number, size, etc. of the communication holes 52, 54 are set separately according to the diameter size of 40. Specifically, the communication hole 52 of the side wall 48 on the side of the bearing 38 having a large diameter dimension and a large amount of required oil has a larger diameter dimension than the communication hole 54 on the opposite side.
- the position of the communication holes 52, 54 that is, the supply position of the lubricating oil to the bearings 38, 40 is on the non-rotating side, that is, the support case 36, where the power loss due to the viscous resistance and shear resistance due to the supply of the lubricating oil is relatively small.
- the diameter of the separator 46 is determined and the side wall 48 is set so that the lubricating oil is supplied to the outer ring 38g, 40g side fixed integrally, specifically, to the outer peripheral side of the cages 38c, 40c.
- the outer diameter is larger than that of the opposite side wall 50, and the communication hole 52 is provided on the outer peripheral side of the communication hole 54.
- FIG. 4 (b) is a diagram for explaining the total amount of oil penetrating through the bearings 38 and 40 on both sides, and the alternate long and short dash line is a conventional case not provided with the separator 46, and the required oil amount indicated by a broken line is shown in FIG.
- the supply amount is limited by the communication holes 52 and 54, while a large amount of extra lubricating oil is circulated particularly on the high rotation side. The amount of oil is reduced, and the power loss due to the viscous resistance of the lubricating oil is reduced especially on the high rotation side.
- both the communication holes 52 and 54 are provided with circular holes, and a plurality of them are provided at equal angular intervals on the circumference centered on the center line S.
- the separator 46 of the present embodiment is integrally formed, for example, by subjecting a metal cylinder or flat plate to bending processing or drawing processing by press processing, and from the outer peripheral edges of the side walls 48 and 50 on both sides.
- a pair of cylindrical folded portions 56 and 58 are provided with a predetermined length so as to extend inward and approach each other in parallel with the center line S.
- the folded portions 56 and 58 are press-fitted and fixed to the support case 36 so that the folded portions 56 and 58 are in close contact with the cylindrical inner peripheral surface of the support case 36. The strength can be obtained easily and stably.
- the cylindrical separator 46 is disposed substantially concentrically with the drive pinion 30 between the pair of bearings 38 and 40, and the oil supply port 44. Since the lubricating oil supplied from is received by the oil receiving portion 47 of the separator 46, the lubricating oil directly adheres to the stepped shaft 42 of the drive pinion 30 or the spacer 62 that rotates integrally with the stepped shaft 42. Power loss caused by rotation and stirring is reduced.
- the lubricating oil received by the oil receiving portion 47 of the separator 46 is held in the oil reservoir 60 and a pair of bearings 38 at a predetermined flow rate from the communication holes 52 and 54 provided in the side walls 48 and 50 on both sides.
- the separator 46 of this embodiment includes a cylindrical oil receiving portion 47 disposed substantially concentrically on the outer peripheral side of the stepped shaft 42 of the drive pinion 30, and an outer peripheral side from both ends of the oil receiving portion 47.
- a pair of annular side walls 48, 50 which are provided so as to extend to the cylindrical inner peripheral surface of the support case 36 and face the pair of bearings 38, 40, and the pair of side walls 48 and 50 are provided with a plurality of communication holes 52 and 54 at equal angular intervals around the center line S of the oil receiving portion 47, respectively. Therefore, it is possible to easily and integrally assemble the support case 36 by press-fitting at an arbitrary phase.
- the sizes of the side walls 48 and 50 are set so that the lubricating oil supply position and supply amount are optimized for the bearings 38 and 40 according to the diameters of the bearings 38 and 40 on both sides. Since the position, number, size, and the like of the communication holes 52 and 54 are set separately, an appropriate amount of lubricating oil is supplied to an appropriate supply position regardless of the difference in diameter of the bearings 38 and 40. Is done.
- annular separator 46 is used which is disposed substantially concentrically on the outer peripheral side of the stepped shaft 42 of the drive pinion 30 and surrounds the entire circumference.
- a semi-cylindrical oil receiving portion 72 that covers only the upper half of the stepped shaft 42, and a support case provided in a fan shape so as to extend from both axial ends of the oil receiving portion 72 to the outer peripheral side.
- a pair of semi-annular side walls 74, 76 that are in close contact with the inner peripheral surface of 36, and an inner periphery of the support case 36 provided so as to extend from the side edges on both sides of the oil receiving portion 72 to the outer peripheral side.
- FIG. 5 is a view corresponding to FIG. 3, and FIG. 3 is a view showing the upper half of the center line S, whereas FIG. 5 is a view showing the entire separator 70. Is a left side view, (b) is a cross-sectional view cut in parallel with the center line S, and (c) is a right side view.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
図1は、本発明が適用された軸受潤滑構造を備えている終減速装置20を有する前置エンジン後輪駆動(FR)形式の車両10の動力伝達機構を説明する図である。この図1において、車両10は、動力源であるエンジン12と、左右1対の前輪14L、14Rと、上記エンジン12の出力回転を変速するための自動変速機16と、その自動変速機16の出力軸から出力される駆動力を伝達するためのプロペラシャフト18と、後輪用駆動力分配装置として機能する終減速装置20と、その終減速装置20により分配された駆動力を伝達するための左右1対の後輪車軸22L、22Rと、その後輪車軸22L、22Rを介して駆動力が伝達される左右1対の後輪24L、24Rとを備えている。
Claims (2)
- 支持ケース内に軸方向に離間して配設され、所定の回転軸を軸心まわりに回転可能に支持している一対の軸受と、
該一対の軸受を潤滑するための潤滑油を該一対の軸受間に供給するために前記支持ケースに設けられた油供給口と、
を有する回転軸の軸受潤滑構造において、
前記一対の軸受間には、前記油供給口から供給された潤滑油を受け止めるセパレータが前記支持ケースに一体的に配設されているとともに、
該セパレータの両端部には、それぞれ前記支持ケースの内周面に向かって突き出して密着させられるとともに前記一対の軸受に対面させられる一対の側壁が設けられており、
該一対の側壁には、前記油供給口から供給された潤滑油が前記一対の軸受側へ所定の流量で流出することを許容する連通孔が設けられている
ことを特徴とする回転軸の軸受潤滑構造。 - 前記セパレータは、前記回転軸の外周側に該回転軸と略同心に配設される円筒形状の油受け部と、該油受け部の両端部からそれぞれ外周側へ延び出すように設けられて前記支持ケースの円筒内周面に密着させられるとともに前記一対の軸受と対面させられる一対の円環形状の側壁とを有し、
該一対の側壁に設けられる前記連通孔は、それぞれ前記油受け部の中心線まわりに等角度間隔で複数設けられている
ことを特徴とする請求項1に記載の回転軸の軸受潤滑構造。
Priority Applications (3)
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CN2009801166213A CN102016336B (zh) | 2008-05-12 | 2009-03-09 | 旋转轴的轴承润滑结构 |
US12/992,213 US8376623B2 (en) | 2008-05-12 | 2009-03-09 | Bearing lubricating structure for rotating shaft |
DE112009001115T DE112009001115B4 (de) | 2008-05-12 | 2009-03-09 | Lagerschmierstruktur für eine Drehwelle |
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JP2008125222A JP4930453B2 (ja) | 2008-05-12 | 2008-05-12 | 回転軸の軸受潤滑構造 |
JP2008-125222 | 2008-05-12 |
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WO2009139217A1 true WO2009139217A1 (ja) | 2009-11-19 |
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PCT/JP2009/054471 WO2009139217A1 (ja) | 2008-05-12 | 2009-03-09 | 回転軸の軸受潤滑構造 |
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US (1) | US8376623B2 (ja) |
JP (1) | JP4930453B2 (ja) |
CN (1) | CN102016336B (ja) |
DE (1) | DE112009001115B4 (ja) |
WO (1) | WO2009139217A1 (ja) |
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CN104806641B (zh) * | 2015-04-30 | 2017-03-29 | 盐城市三川轴承制造有限公司 | 圆锥滚子轴承润滑结构 |
CN104806640B (zh) * | 2015-04-30 | 2017-05-24 | 德清德曼汽车零部件有限公司 | 圆锥滚子轴承外圈 |
DE102015210242B4 (de) * | 2015-06-03 | 2022-08-25 | Schaeffler Technologies AG & Co. KG | Radlageranordnung für ein Fahrzeug |
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DE102015215462A1 (de) * | 2015-08-13 | 2017-02-16 | Schaeffler Technologies AG & Co. KG | Wälzlageranordnung mit Schmiermittelzuführung |
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Also Published As
Publication number | Publication date |
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CN102016336B (zh) | 2013-08-21 |
DE112009001115B4 (de) | 2013-03-21 |
DE112009001115T5 (de) | 2011-04-14 |
JP4930453B2 (ja) | 2012-05-16 |
CN102016336A (zh) | 2011-04-13 |
US8376623B2 (en) | 2013-02-19 |
JP2009275732A (ja) | 2009-11-26 |
US20110064344A1 (en) | 2011-03-17 |
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