FR3008154A1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
FR3008154A1
FR3008154A1 FR1356589A FR1356589A FR3008154A1 FR 3008154 A1 FR3008154 A1 FR 3008154A1 FR 1356589 A FR1356589 A FR 1356589A FR 1356589 A FR1356589 A FR 1356589A FR 3008154 A1 FR3008154 A1 FR 3008154A1
Authority
FR
France
Prior art keywords
internal combustion
combustion engine
characterized
bearings
rolling elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR1356589A
Other languages
French (fr)
Inventor
Julien Maffucci
Richard Corbett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF AB
Original Assignee
SKF AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF AB filed Critical SKF AB
Priority to FR1356589A priority Critical patent/FR3008154A1/en
Publication of FR3008154A1 publication Critical patent/FR3008154A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/22Compensation of inertia forces
    • F16F15/26Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F16F15/264Rotating balancer shafts
    • F16F15/267Rotating balancer shafts characterised by bearing support of balancer shafts; Lubrication arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/185Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54Systems consisting of a plurality of bearings with rolling friction
    • F16C19/541Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing
    • F16C19/542Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing with two rolling bearings with angular contact
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00Apparatus or articles in engineering in general
    • F16C2361/53Spring-damper, e.g. gas springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/581Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels

Abstract

This internal combustion engine (M) comprises at least one balancing shaft (4, 12) rotated by a crankshaft (2) of the internal combustion engine (M), said at least one balancing shaft (4, 12) being rotatably mounted in a frame (B) of the internal combustion engine (M). The rotation of the at least one balancer shaft (4, 12) is enabled by double-row rolling element bearings (9, 10, 11, 23, 24, 25) each comprising two bearings (231, 233) to a row of rolling elements paired with each other.

Description

The present invention relates to an internal combustion engine comprising at least one balancing shaft.

Internal combustion engines may include balancing systems that compensate for engine vibrations due to piston movement. An internal combustion engine sometimes comprises a single balancer shaft, but more generally two balancing shafts rotated in phase opposition by a gear wheel of the crankshaft of the internal combustion engine. Balancing shafts generally include at least one eccentric mass, which causes radial and axial loads that increase with the speed of rotation of the balancing shafts. The balance shafts are usually mounted in internal combustion engine mounts via ball, needle or roller bearings. It is known in particular from US-A-2011/0247581 to equip balancing shafts of bearings with a single row of balls. Such bearings have uncontrollable axial clearance which generates significant noise and pollution and has a reduced service life when used to support balance shafts. It is these drawbacks that the invention intends to remedy by proposing a new internal combustion engine, whose balance shafts are supported in rotation more reliably than in the state of the art. To this end, the invention relates to an internal combustion engine comprising at least one balancing shaft driven in rotation by a crankshaft of the internal combustion engine, said at least one balancer shaft being rotatably mounted in a frame of the internal combustion engine. This internal combustion engine is characterized in that the rotation of said at least one balancer shaft is enabled by double-row rolling element bearings each comprising two rolling-row rolling bearings paired with one another. other. Thanks to the invention, the axial play of the bearings which support the rotation of the balancing shafts can be canceled, which makes it possible to reduce the noise produced by the bearings and to prolong their service life. According to advantageous but non-mandatory aspects of the invention, such an internal combustion engine may incorporate one or more of the following features, taken in any technically permissible combination: - The rolling elements are balls, rollers or needles. - The bearings for rotating said at least one balancer shaft are oblique contacts. - The bearings for rotating said at least one balancing shaft are in straight contact. - The internal combustion engine comprises a follower gear interposed between a crankshaft gear and a gear of said at least one balancer shaft. - The internal combustion engine comprises two balancing shafts, a reversing gear interposed between a crankshaft gear and a gear wheel of one of the balance shafts, and the rotation of the reversing gear relative to the frame of the engine to Internal combustion is permitted by a double-row rolling bearing with oblique-contact rolling elements. - At least one of the double-row rolling element bearings is lubricated with a lubricating oil of the internal combustion engine. - At least one of the double-row rolling element bearings is equipped with seals which maintain, in a rolling chamber defined by said seals, a lubricant, such as an oil or a grease, disposed before assembly said seals with the bearing rings. - The inner ring of the bearing is fixedly mounted in the frame, and the reversing pinion and the outer ring of the rolling bearing double row of rolling elements with oblique contacts are formed integrally. - The double row rolling contact rolling bearing is mounted on a shaft through its inner ring and this inner ring is integrally formed on this shaft. The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an internal combustion engine according to its principle, given by way of non-limiting example with reference to attached drawings in which: - Figure 1 is a sectional view of an internal combustion engine according to the invention; FIG. 2 is an enlarged view of detail II in FIG. 1; FIG. 3 is a view on a larger scale of detail III in FIG. 1. An internal combustion engine M is shown in FIG. 1. The engine M comprises a frame B. The internal combustion engine M comprises a crankshaft 2 of which one end is provided with a toothed wheel 20. The toothed wheel 20 is engaged with a toothed wheel 40 of a first balancer shaft 4, which is rotatably mounted in three supports 7 of the frame B. The rotation of the balancer shaft 4 in the supports 7 is permitted by two bearings 9 and 10 on a first side of the gear 40, and a third bearing 11 located on the other side of the gear 40 relative to the bearings 9 and 10. The internal combustion engine M also comprises a second balancer shaft 12, comprising a gear wheel 120. The balancer shaft 12 is rotatably mounted in three supports 21 of the frame B. The rotation of the balancer shaft 12 is permitted by two bearings 23 and 24 located on a first side of the gear wheel 120 and a third bearing located on the other side of the gear wheel 120 relative to the bearings 23 and 24.

The balancer shaft 12 is engaged with an inverter gear 14, itself engaged with the gear wheel 20. The reversing gear 14 allows the direction of rotation of the balancer shaft 12 to be reversed relative to the direction of rotation of the balance shaft 4. The reversing gear 14 comprises a shaft 140 which is rotatably mounted in a support 16 of the frame B, by means of a bearing 17.

The internal combustion engine M is here shown diagrammatically so that the axes of rotation of the balance shafts 4 and 12, the reversing gear 14 and the crankshaft 2 are included in the same plane for the understanding of the drawing. In practice, the axes of rotation of the balance shafts 4 and 12, the reversing gear 14 and the crankshaft 2 can be included in different planes.

Each of the balance shafts 4 and 12 respectively comprises an eccentric or unbalanced mass 42 and 122 which makes it possible to obtain the desired compensation for the vibrations due to the displacement of the pistons, which are not represented for the sake of clarity. The bearing 17 is a double row angular contact bearing around which the reversing pinion 14 is generally mounted. The reversing gear 14 and the bearing 17 are radially aligned. Such a bearing provides better control of the axial play, and produces less noise in operation than a conventional bearing. Better axial clearance control improves the life of the bearing. The bearing 17 is therefore adapted to withstand the high torques exerted on the reversing gear 14 during operation of the internal combustion engine M. As is more specifically shown in FIG. 2, the bearing 17 consists of a single bearing. double row of balls comprising an inner ring 170 mounted on the shaft 140, an outer ring 172 mounted in the frame B and balls 174. The inner ring 170 comprises two raceways 170a formed by cavities of the inner ring 170 The outer ring 172 has two tracks 172a. The balls 174 are in contact with the tracks 170a and 172a along oblique lines of contact L1 and L2. According to a not shown embodiment of the invention, the inner ring 170 of the bearing 17 and the shaft 140 are formed integrally.

According to another embodiment not shown of the invention, the pinion 14 does not include a shaft 140 and is formed integrally with the outer ring 172 of the bearing 17, while the ring 170 of the bearing 17 is fixedly mounted in the frame B. According to a non-illustrated embodiment of the invention, the bearing 17 can be an assembly of two single-row straight-contact ball bearings paired with each other by a known method of FR-B- 2,913,739 and modified to have oblique contacts. This solution is less expensive and makes it possible to cancel the axial clearance of the double-row bearing thus obtained, which considerably reduces the noise generated by its operation. The bearings 9, 10, 11 and 23, 24 and 25 are double row of balls and each consist of two single-row ball bearings paired with each other. This eliminates the noise generated by the operation of the bearings by eliminating the axial play. As shown in Figure 3 for the bearing 23 only, the bearing 23 comprises a first bearing 231 single row of balls and a second bearing 233 single row of balls. Each of the bearings 231 and 233 respectively comprises a row of balls 231a and 233a disposed between an inner ring 231b and 233b and an outer ring 231c and 233c. The bearings 231 and 233 are joined to each other along an axis of rotation X23, which also corresponds to the longitudinal axis of the bearings 231 and 233. The inner rings 231b and 233b and the outer rings 231c and 233c are joined to each other by a surface contact between the side faces 231d of the bearing 231 and the side faces 233d of the bearing 233 opposite the faces 231d. Advantageously, at least one of the bearings 9, 10, 11, 23, 24, 25 and 17 is lubricated by a lubricating oil of the internal combustion engine M. According to a variant not shown, at least one of the bearings 9, 10, 11 , 23, 24, 25 and 17 may comprise seals which delimit a rolling chamber in which the rolling elements of this bearing are arranged. The seals maintain in the bearing chamber a lubricant, such as oil or grease, disposed in the chamber prior to assembling the seals with the inner and outer races of the bearing.

The bearings 9, 10, 11 and 23, 24 and 25 are in this embodiment of the ball bearings with straight contacts. In variant not shown, these bearings may be angular contact ball bearings. According to a not shown embodiment of the invention, the bearings 9, 10, 11, 23, 24, 25 and 17 may comprise, instead of balls, other rolling elements such as rollers or needles. According to a not shown embodiment of the invention, the motor M comprises only one balancing shaft. In such a case, the pinion 14 is a follower pinion.

The technical features of the embodiments and variants described above may be combined within the scope of the present invention.

Claims (10)

  1. CLAIMS1.- Internal combustion engine (M) comprising at least one balancing shaft (4, 12) rotated by a crankshaft (2) of the internal combustion engine (M), said at least one balancing shaft ( 4, 12) being rotatably mounted in a frame (B) of the internal combustion engine (M), characterized in that the rotation of said at least one balancer shaft (4, 12) is permitted by bearings (9). , 10, 11, 23, 24, 25) with a double row of rolling elements each comprising two bearings (231, 233) with a row of rolling elements (231a, 233a) paired with each other.
  2. 2.- internal combustion engine according to claim 1, characterized in that the rolling elements (231a, 233a) are balls, rollers or needles.
  3. 3.- internal combustion engine according to one of the preceding claims, characterized in that the bearings (9, 10, 11, 23, 24, 25) for the rotation of said at least one balancing shaft (4, 12) are angled contacts.
  4. 4.- internal combustion engine according to one of claims 1 and 2, characterized in that the bearings (9, 10, 11, 23, 24, 25) for the rotation of said at least one balancing shaft (4, 12) are in straight contact.
  5. 5.- internal combustion engine according to one of the preceding claims, characterized in that it comprises a follower pin interposed between a toothed wheel (20) of the crankshaft (2) and a toothed wheel of said at least one balancing shaft (4, 12).
  6. 6.- internal combustion engine according to one of the preceding claims, characterized in that it comprises two balancing shafts (4, 12), and an inverter pinion (14) interposed between a gear wheel (20) of the crankshaft (2) and a toothed wheel (120) of one (12) balancing shafts (4, 12), and that the rotation of the reversing gear (14) relative to the frame (B) of the motor internal combustion (M) is permitted by a rolling bearing (17) with double row of oblique-contact rolling elements.
  7. 7.- internal combustion engine according to claim 5, characterized in that at least one of the bearings (9, 10, 11, 23, 24, 25, 17) with double row of rolling elements is lubricated by a lubricating oil. of the internal combustion engine (M).
  8. 8.- internal combustion engine according to one of the preceding claims, characterized in that at least one of the rolling elements (9, 10, 11, 23, 24, 25, 17) with double row of rolling elements is equipped with joints sealing members which maintain, in a rolling chamber defined by said seals, a lubricant, such as oil or grease, disposed prior to assembly of said seals with the bearing rings.
  9. 9.- internal combustion engine according to one of claims 6 to 8, characterized in that the inner ring of the bearing (17) is fixedly mounted in the frame (B), and in that the pinion inverter (14) and the outer race of the rolling bearing (17) with double row of rolling elements with oblique contacts is integrally formed.
  10. 10.- internal combustion engine according to one of claims 6 to 8, characterized in that the bearing (17) double row of rolling elements with oblique contacts is mounted on a shaft (140) via its inner ring (170) and that said inner ring (170) is integrally formed on said shaft (140).
FR1356589A 2013-07-04 2013-07-04 Internal combustion engine Withdrawn FR3008154A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1356589A FR3008154A1 (en) 2013-07-04 2013-07-04 Internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1356589A FR3008154A1 (en) 2013-07-04 2013-07-04 Internal combustion engine

Publications (1)

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FR3008154A1 true FR3008154A1 (en) 2015-01-09

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FR1356589A Withdrawn FR3008154A1 (en) 2013-07-04 2013-07-04 Internal combustion engine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038023A1 (en) * 2015-06-29 2016-12-30 Skf Ab Bearing assembly for combustion engine shaft and combustion engine
FR3038022A1 (en) * 2015-06-29 2016-12-30 Skf Ab Bearing assembly for combustion engine shaft and combustion engine.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903419A1 (en) * 1988-02-25 1989-09-07 Volkswagen Ag Mass-balancing arrangement
GB2314889A (en) * 1996-07-03 1998-01-14 Honda Motor Co Ltd Engine with balancer device for vehicle
DE19851547A1 (en) * 1997-11-10 1999-05-20 Aisin Seiki Automotive mass balance with oil sump
DE10207459A1 (en) * 2002-01-22 2003-07-24 Opel Adam Ag - Mass balance shaft made in sections with weight zones for automotive piston engine
EP1837535A1 (en) * 2006-03-22 2007-09-26 Ab Skf Machine part
EP2037134A1 (en) * 2007-09-11 2009-03-18 Georg Fischer GmbH & Co. KG Bearing arrangement for motor vehicles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903419A1 (en) * 1988-02-25 1989-09-07 Volkswagen Ag Mass-balancing arrangement
GB2314889A (en) * 1996-07-03 1998-01-14 Honda Motor Co Ltd Engine with balancer device for vehicle
DE19851547A1 (en) * 1997-11-10 1999-05-20 Aisin Seiki Automotive mass balance with oil sump
DE10207459A1 (en) * 2002-01-22 2003-07-24 Opel Adam Ag - Mass balance shaft made in sections with weight zones for automotive piston engine
EP1837535A1 (en) * 2006-03-22 2007-09-26 Ab Skf Machine part
EP2037134A1 (en) * 2007-09-11 2009-03-18 Georg Fischer GmbH & Co. KG Bearing arrangement for motor vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038023A1 (en) * 2015-06-29 2016-12-30 Skf Ab Bearing assembly for combustion engine shaft and combustion engine
FR3038022A1 (en) * 2015-06-29 2016-12-30 Skf Ab Bearing assembly for combustion engine shaft and combustion engine.

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