US20110194800A1 - Clutch release bearing device - Google Patents
Clutch release bearing device Download PDFInfo
- Publication number
- US20110194800A1 US20110194800A1 US12/978,183 US97818310A US2011194800A1 US 20110194800 A1 US20110194800 A1 US 20110194800A1 US 97818310 A US97818310 A US 97818310A US 2011194800 A1 US2011194800 A1 US 2011194800A1
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- US
- United States
- Prior art keywords
- rotating ring
- radial
- radial portion
- axial
- operating element
- 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.)
- Abandoned
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 15
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
- F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
- F16D23/142—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings with a resilient member acting radially between the bearing and its guide means
-
- 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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings 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
- F16C19/16—Bearings 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 a single row of balls
- F16C19/163—Bearings 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 a single row of balls with angular contact
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
-
- 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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer race
-
- 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
- F16C2361/43—Clutches, e.g. disengaging bearing
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84
Definitions
- the present invention relates to the field of clutch release bearings, in particular for automobiles, of the type including a thrust rolling bearing mounted on an operating element.
- French document No. 2 819 864 is known to describe a clutch release bearing including a leading element mounted on an operating element.
- the leading element includes a bearing provided with a rotating ring and a non-rotating ring capable of moving radially relative to the operating element for its self-alignment relative to the clutch diaphragm.
- the non-rotating ring includes a radial portion facing inwards.
- the device includes a means of axially interlocking the leading element on the operating element in the form of a lock washer.
- the device includes a self-alignment element in the form of a sheet metal piece, centered on the non-rotating ring and provided with axially elastic tabs, such that the said self-alignment element exerts axial pressures in opposite directions on the lock washer and on the non-rotating ring and keeps the non-rotating ring in permanent axial contact with a radial bearing surface of the operating element.
- Document JP A 6-213251 shows a clutch release bearing including an outer non-rotating ring provided with an inward-facing radial branch between the balls and a radial collar of an operating element, a metal flange provided with a large diameter axial portion partially surrounding the said ring, a radial portion placed between the radial branch of the said ring and the radial collar of the operating element, and a small diameter axial portion, and a flexible sleeve supported by the small diameter axial portion and extending from the radial branch of the said ring to beyond the radial plane passing through the center of the balls.
- Such a clutch bearing is axially bulky while being costly and difficult to assemble.
- Described herein is an economic clutch release bearing, easy to assemble, compact and furthermore providing an excellent transverse seal for the thrust bearing, this seal retaining its full effectiveness irrespective of the radial movement of the bearing relative to the operating element during the self-centering of the bearing.
- clutch release bearings in particular for automobiles, of the type including a thrust rolling bearing mounted on an operating element.
- the operating element is actuated mechanically or hydraulically in order to move the rolling-contact bearing axially so that the latter acts via its rotating ring on the fingers of a clutch diaphragm and thus makes it operate.
- clutch release bearings in which an elastic self-alignment element is placed between the non-rotating ring of the thrust bearing and the operating element supporting the said thrust bearing in order to allow a radial movement of the bearing relative to the operating element in order to allow the self-alignment of the bearing on the diaphragm, while providing an axial interlocking of the bearing and the operating element are described.
- clutch release bearings including a bearing provided with rings of pressed sheet steel, the outer ring and the inner ring each being provided with a radial portion facing inwards, offset axially one from the other and each including a circular central opening, the central opening of the non-rotating ring being of smaller diameter than the diameter of the central opening of the outer ring are described.
- This bearing structure allows the said push-rod-end bearing to be provided with a hydraulic control device for example without waste of space in the axial direction since a part of the push-rod is housed in the thrust bearing.
- the clutch release bearing device is of the type including an operating element, a rolling bearing furnished with a non-rotating ring and a rotating ring, the said non-rotating ring being provided with a radial portion facing inwards and having a central opening, the said rolling bearing being mounted on the operating element with which it may move axially, and a self-alignment sleeve placed between the non-rotating ring and the operating element and provided with a plurality of elastic ribs facing inwards.
- the self-alignment sleeve includes an axial portion adjusted in the central opening of the radial portion of the non-rotating ring, and a radial portion facing outwards and pressing axially against the inward-facing radial portion of the non-rotating ring.
- the elastic ribs are placed relative to a plane passing through the center of the rolling elements on the same side as a bearing face of the rotating ring on a diaphragm, and extending axially over a part of the space delimited by a radial plane passing through the bearing face of the rotating ring on a diaphragm and by a radial plane passing through the bearing face of the non-rotating ring on the operating element.
- the sleeve is extremely compact axially and rests in a radial space defined by a dummy cylinder flush with the raceway of the inner ring.
- the self-alignment sleeve includes a rigid brace and a flexible body, the ribs being made in one piece with the said body.
- the body may be overmolded on the brace. The sleeve then forms one piece that cannot be removed and is easy to manipulate before and during assembly.
- the self-alignment sleeve includes a metal brace provided with a central axial portion and a radial portion.
- the metal brace may be in contact with the non-rotating ring by its central axial portion and its radial portion.
- the metal brace may be inserted into the central opening of the radial portion of the non-rotating ring. The insertion is made over a length at least equal to the thickness of the non-rotating ring.
- the self-alignment sleeve includes a second axial portion forming a narrow passage with the rotating ring.
- the second axial portion may be formed on the brace.
- the second axial portion may be formed from the body with which it is made in one piece.
- the self-alignment sleeve includes a sealing lip interacting with the rotating ring.
- the sealing lip may interact with a circular axial surface of the rotating ring formed by the bore of a radial portion facing towards the interior of the rotating ring.
- the sealing lip may interact with a radial surface of the rotating ring formed on a radial portion of the rotating ring facing inwards.
- the sealing ring may be made in one piece with the body of the sleeve.
- the sleeve also performs a sealing function.
- the rotating ring and the non-rotating ring have a substantially constant thickness.
- the rings may be made of pressed sheet steel.
- the clutch release leading element is intended to be mounted on an operating element to form a clutch release device.
- the leading element includes a thrust rolling bearing provided with a non-rotating ring and a rotating ring, and a self-alignment sleeve including a plurality of inward facing elastic ribs.
- the non-rotating ring is provided with a radial portion facing inwards and having a central opening, the self-alignment sleeve including an axial portion adjusted in the central opening of the radial portion of the non-rotating ring, and a radial portion facing outwards and bearing axially against the inward facing radial portion of the non-rotating ring.
- Such a leading element is easy to manipulate and mount on an operating element.
- Such a clutch release bearing is of simple structure, the sleeve being a single piece and providing the link between the operating element and the leading element.
- FIG. 1 is a half-view in axial section of a clutch release bearing device
- FIG. 2 is a half-view in axial section of the leading element in FIG. 1 ;
- FIG. 3 is a front view in elevation of the leading element in FIG. 2 ;
- FIGS. 4-7 are detailed views showing sleeve variants.
- the clutch release bearing includes a rolling bearing 1 mounted on an operating element 2 , advantageously made of synthetic material and including a cylindrical body 3 and a radial bearing surface 4 .
- the operating element 2 may for example have the shape of a piston of a hydraulic clutch-operating device or of a separate push rod axially extending the said piston.
- the operating element 2 is usually mounted by its bore 5 onto a stationary guide-tube not shown, while the said operating element 2 is capable of moving in translation along the axis of the guide-tube.
- a free end of the operating element 2 includes a cylindrical portion 6 of lesser thickness than the cylindrical body 3 and provided with an outer surface 7 .
- the radial bearing surface 4 is placed axially between the cylindrical body 3 and the cylindrical portion 6 .
- a retention element 8 in the form of an annular rib facing outwards is formed on the outer surface 7 axially opposite the radial surface 4 .
- the rolling bearing 1 includes an inner, non-rotating ring 9 with a thin wall made by pressing of a metal sheet or of a tube and having an annular raceway 10 for a row of rolling elements 11 kept regularly spaced from one another in the circumferential direction by a cage 12 .
- the inner ring 9 also includes an extension facing inwards in the form of a radial portion 13 having a bore 13 a and a cylindrical extension 14 on the side opposite the radial portion 13 relative to the row of balls.
- the radial portion 13 is in contact with the radial surface 4 of the operating element 2 .
- the rolling bearing 1 is supplemented by an outer rotating ring 15 also with a thin wall made by pressing a metal sheet or a tube and which has an annular raceway 16 for the rolling elements 11 , and a radial portion 17 facing inwards which comes into contact with the surface of a diaphragm 18 of a clutch device in order to actuate it when the clutch release bearing assembly supported by the operating element 2 is moved axially.
- the rolling bearing 1 is protected on the side opposite the diaphragm 18 by a sealing element 19 attached in the bore of the outer ring 15 and having a lip 20 coming into friction contact with the cylindrical extension 14 of the inner ring 9 .
- the clutch release bearing is supplemented by a self-alignment element 21 in the form of an elastic sleeve.
- the self-alignment element 21 includes a metal brace 22 made of thin sheet metal and having an annular form with a small diameter axial portion 22 a adjusted in the bore 13 a of the radial portion 13 of the non-rotating ring 9 , the bore 13 a being formed in the thickness of the said radial portion 13 .
- a small diameter radial portion 22 b extends the axial portion 22 a outwards and extends in contact with the face of the radial portion 13 of the non-rotating ring 9 situated on the side of the diaphragm 18 .
- the small diameter radial portion 22 b extends over a part of the radial height of the radial portion 13 , for example, over approximately 1 ⁇ 3 to 2 ⁇ 3.
- the brace 22 includes a large diameter axial portion 22 c extending towards the diaphragm 18 from the large diameter end of the radial portion 22 b , and a large diameter radial portion 22 d extending outwards from the end of the large diameter axial portion 22 c axially adjacent to the diaphragm 18 .
- the large diameter radial portion 22 d is flush with the radial plane passing through the outer face of the radial portion 17 of the non-rotating ring 15 . This avoids an increase in the axial bulk of the thrust bearing.
- the self-alignment element 21 is supplemented by a body 23 made of synthetic material, for example of elastomer or of rubber, and attached to the brace 22 , for example by overmoulding.
- the body 23 has a globally rectangular section with two opposite radial faces one of which is in contact with the small diameter radial portion 22 b of the brace 22 and the other is flush with the radial plane of the outer face of the radial portion 17 of the rotating ring 15 .
- the body 23 is also delimited by an outer surface in contact with the bore of the large diameter axial portion 22 c of the brace 22 and by a bore. From the bore of the body 23 a plurality of splines 24 extend facing radially inwards and inclined circumferentially, coming into contact with the outer surface 7 of the reduced thickness cylindrical portion 6 of the operating element 2 .
- the splines 24 are retained axially by the annular rib 8 formed at the free end of the outer surface 7 .
- the radial interference between the rib 8 and the splines 24 provides an axial interlocking between the operating element 2 and the self-alignment element 21 and therefore with the rolling bearing 1 .
- the axial splines 24 extend axially between the radial plane passing through the outer face of the radial portion 17 of the rotating ring 15 in contact with the diaphragm 18 and the radial surface 4 of the operating element 2 .
- the self-alignment element 21 also includes a seal 25 including a heel 26 and a lip 27 advantageously made of the same material and at the same time as the body 23 .
- the heel 26 surrounds the large diameter axial portion 22 c of the brace 22 and is delimited axially between the large diameter radial portion 22 d of the brace 22 and the radial portion 13 of the non-rotating ring 9 .
- the sealing lip 27 extends outwards and comes into sliding contact with the bore 17 a of the radial portion 17 of the rotating ring 15 , the said bore 17 a being formed by the thickness of the radial portion 17 , blocking off the annular space between the rings 9 and 15 .
- a self-alignment element is made in a single piece, easy to mount on the non-rotating ring by a simple axial fitting movement and particularly compact axially and radially. It is notable in particular that the self-alignment element 21 fits entirely between the radial plane of contact of the diaphragm 18 with the non-rotating ring 15 and the radial plane passing through the center of the rolling elements 11 . More particularly, the axial end of the self-alignment element 21 close to the rolling elements 11 is flush with a radial plane tangential to the rolling elements, on the side of the rolling elements 11 situated closest to the diaphragm 18 .
- FIG. 4 illustrates one embodiment similar to the preceding one except that the brace 22 has no large diameter radial portion, the large diameter axial portion 22 c forming a narrow passage with the bore 17 c of the radial portion 17 of the rotating ring 15 .
- the seal 25 is placed on the periphery of the said large diameter axial portion 22 c and radially between the radial portion 17 of the rotating ring 15 and the radial portion 13 of the non-rotating ring 9 .
- the sealing lip 27 comes into sliding contact with the internal face 17 b of the radial portion 17 of the rotating ring 15 on the side of the rolling elements.
- the seal 25 is in contact with the radial portion 13 of the non-rotating ring 9 and thus provides a static seal.
- the brace 22 includes a short, large diameter axial portion 22 c placed axially between the radial portion 17 and the radial portion 13 and forming a narrow passage with the internal face 17 b of the radial portion 17 .
- the radial portion 22 b of the brace 22 here has an external diameter greater than the bore 17 a of the radial portion 17 .
- the seal 25 is made in one piece with the body 23 , the function of the heel being provided by the said body 23 .
- the sealing lip 27 comes into sliding contact with the bore 17 a of the radial portion 17 .
- the body 23 must have a radial thickness sufficient to avoid an excessive pressure of the sealing lip 27 because of the possible deformation of the body 23 under the pressure of the splines 24 .
- the large diameter axial portion 22 c of the brace 22 is placed axially between the radial portion 17 of the rotating ring 15 and the radial portion 13 of the rotating ring 9 .
- the radial portions 13 and 17 have bores of similar diameter.
- the body 23 is therefore mostly placed between the radial portions 13 and 17 .
- the body 23 includes, in addition, close to its bore, an annular rib 28 projecting axially towards the diaphragm and forming a narrow passage with the bore 17 a of the radial portion 17 of the rotating ring 15 .
- FIGS. 4 to 6 therefore shows a self-alignment element fitted with two sealing means, one by narrow passage, and the other friction, which further increases the overall effectiveness of the seal of the rolling bearing.
- the brace 22 includes an axial portion 22 a fitted into the bore 13 a of the radial portion 13 of the non-rotating ring 9 , a radial portion 22 e facing outwards from the end of the axial portion 22 a opposite the radial portion 17 and extending over a part of the length of the radial portion 13 while being in contact with the latter.
- the brace 22 is supplemented by a rim 22 f situated in the extension of the axial portion 22 a , on the side opposite the radial portion 22 e and slightly bent inwards.
- the body 23 and the seal 25 are made in one piece, the body 23 covering the inner surface of the portions 22 a and 22 f of the brace 22 and the seal 25 covering the free end and the periphery of the portion 22 f .
- the portions 22 a and 22 f provide the rigidity of the body 23 .
- the sealing lip 27 extends outwards towards the face 17 b of the radial portion 17 situated opposite the radial portion 13 .
- the ribs 24 are formed from the bore of the body 23 .
- additional sealing can be provided by a friction seal on the bore 17 a or yet by narrow passage.
- the shape of the brace 22 is here particularly simple and hence low cost.
- the radial portion 22 when the rolling bearing is mounted on the operating element 2 , the radial portion 22 is axially sandwiched between the radial portion 13 of the inner ring 9 and the radial bearing surface 4 of the operating element.
- An embodiment provides a self-alignment sleeve an axial part of which is in contact with the bore of a radial portion of the non-rotating ring while a radial portion is in contact with the radial surface of the same radial portion of the non-rotating ring to form a compact element performing the functions of elastic self-alignment and sealing by the mounting of a single piece including a metal brace and a flexible part and involving an axially delimited space on the side of the diaphragm by the radial plane passing through the diaphragm zone of contact with the rotating ring and on the side of the rolling elements by a radial plane passing through the center of the rolling elements.
- the benefit is a sleeve with elastic ribs which provides an excellent self-alignment and a high reliability while benefiting from a greatly reduced axial bulk.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Clutch release bearing device, including an operating element, a rolling bearing furnished with rolling elements, with a non-rotating ring provided with a radial portion facing inwards and having a central opening, and with a rotating ring, the said rolling bearing being mounted on the operating element with which it may move axially, and a self-alignment sleeve placed between the non-rotating ring and the operating element and provided with a plurality of elastic ribs facing inwards.
Description
- This patent application is a divisional of U.S. patent application Ser. No. 10/965,679 entitled “CLUTCH RELEASE BEARING DEVICE,” filed Oct. 14, 2004, which claims priority to French Patent Application Serial No. FR 0311989 filed on Oct. 14, 2003.
- 1. Field of the Invention
- The present invention relates to the field of clutch release bearings, in particular for automobiles, of the type including a thrust rolling bearing mounted on an operating element.
- 2. Description of the Relevant Art
- French document No. 2 819 864 is known to describe a clutch release bearing including a leading element mounted on an operating element. The leading element includes a bearing provided with a rotating ring and a non-rotating ring capable of moving radially relative to the operating element for its self-alignment relative to the clutch diaphragm. The non-rotating ring includes a radial portion facing inwards. The device includes a means of axially interlocking the leading element on the operating element in the form of a lock washer. The device includes a self-alignment element in the form of a sheet metal piece, centered on the non-rotating ring and provided with axially elastic tabs, such that the said self-alignment element exerts axial pressures in opposite directions on the lock washer and on the non-rotating ring and keeps the non-rotating ring in permanent axial contact with a radial bearing surface of the operating element.
- The number of pieces that comprise such a device is quite high which involves considerable assembly costs.
- Document JP A 6-213251 shows a clutch release bearing including an outer non-rotating ring provided with an inward-facing radial branch between the balls and a radial collar of an operating element, a metal flange provided with a large diameter axial portion partially surrounding the said ring, a radial portion placed between the radial branch of the said ring and the radial collar of the operating element, and a small diameter axial portion, and a flexible sleeve supported by the small diameter axial portion and extending from the radial branch of the said ring to beyond the radial plane passing through the center of the balls.
- Such a clutch bearing is axially bulky while being costly and difficult to assemble.
- Described herein is an economic clutch release bearing, easy to assemble, compact and furthermore providing an excellent transverse seal for the thrust bearing, this seal retaining its full effectiveness irrespective of the radial movement of the bearing relative to the operating element during the self-centering of the bearing.
- Described herein is are clutch release bearings, in particular for automobiles, of the type including a thrust rolling bearing mounted on an operating element. The operating element is actuated mechanically or hydraulically in order to move the rolling-contact bearing axially so that the latter acts via its rotating ring on the fingers of a clutch diaphragm and thus makes it operate.
- In an embodiment, clutch release bearings in which an elastic self-alignment element is placed between the non-rotating ring of the thrust bearing and the operating element supporting the said thrust bearing in order to allow a radial movement of the bearing relative to the operating element in order to allow the self-alignment of the bearing on the diaphragm, while providing an axial interlocking of the bearing and the operating element are described.
- In an embodiment, clutch release bearings including a bearing provided with rings of pressed sheet steel, the outer ring and the inner ring each being provided with a radial portion facing inwards, offset axially one from the other and each including a circular central opening, the central opening of the non-rotating ring being of smaller diameter than the diameter of the central opening of the outer ring are described.
- This bearing structure allows the said push-rod-end bearing to be provided with a hydraulic control device for example without waste of space in the axial direction since a part of the push-rod is housed in the thrust bearing.
- The clutch release bearing device is of the type including an operating element, a rolling bearing furnished with a non-rotating ring and a rotating ring, the said non-rotating ring being provided with a radial portion facing inwards and having a central opening, the said rolling bearing being mounted on the operating element with which it may move axially, and a self-alignment sleeve placed between the non-rotating ring and the operating element and provided with a plurality of elastic ribs facing inwards. The self-alignment sleeve includes an axial portion adjusted in the central opening of the radial portion of the non-rotating ring, and a radial portion facing outwards and pressing axially against the inward-facing radial portion of the non-rotating ring. The elastic ribs are placed relative to a plane passing through the center of the rolling elements on the same side as a bearing face of the rotating ring on a diaphragm, and extending axially over a part of the space delimited by a radial plane passing through the bearing face of the rotating ring on a diaphragm and by a radial plane passing through the bearing face of the non-rotating ring on the operating element. The sleeve is extremely compact axially and rests in a radial space defined by a dummy cylinder flush with the raceway of the inner ring.
- In one embodiment, the self-alignment sleeve includes a rigid brace and a flexible body, the ribs being made in one piece with the said body. The body may be overmolded on the brace. The sleeve then forms one piece that cannot be removed and is easy to manipulate before and during assembly.
- In one embodiment, the self-alignment sleeve includes a metal brace provided with a central axial portion and a radial portion. The metal brace may be in contact with the non-rotating ring by its central axial portion and its radial portion. The metal brace may be inserted into the central opening of the radial portion of the non-rotating ring. The insertion is made over a length at least equal to the thickness of the non-rotating ring.
- In one embodiment, the self-alignment sleeve includes a second axial portion forming a narrow passage with the rotating ring. The second axial portion may be formed on the brace. The second axial portion may be formed from the body with which it is made in one piece.
- In one embodiment, the self-alignment sleeve includes a sealing lip interacting with the rotating ring. The sealing lip may interact with a circular axial surface of the rotating ring formed by the bore of a radial portion facing towards the interior of the rotating ring. The sealing lip may interact with a radial surface of the rotating ring formed on a radial portion of the rotating ring facing inwards. The sealing ring may be made in one piece with the body of the sleeve. Thus the sleeve also performs a sealing function.
- Advantageously, the rotating ring and the non-rotating ring have a substantially constant thickness. The rings may be made of pressed sheet steel.
- The clutch release leading element, according to one embodiment, is intended to be mounted on an operating element to form a clutch release device. The leading element includes a thrust rolling bearing provided with a non-rotating ring and a rotating ring, and a self-alignment sleeve including a plurality of inward facing elastic ribs. The non-rotating ring is provided with a radial portion facing inwards and having a central opening, the self-alignment sleeve including an axial portion adjusted in the central opening of the radial portion of the non-rotating ring, and a radial portion facing outwards and bearing axially against the inward facing radial portion of the non-rotating ring. Such a leading element is easy to manipulate and mount on an operating element.
- Such a clutch release bearing is of simple structure, the sleeve being a single piece and providing the link between the operating element and the leading element.
- The present invention will be better understood and other advantages will appear on reading the detailed description of some embodiments taken as non-limiting examples and illustrated by the appended drawings in which:
-
FIG. 1 is a half-view in axial section of a clutch release bearing device; -
FIG. 2 is a half-view in axial section of the leading element inFIG. 1 ; -
FIG. 3 is a front view in elevation of the leading element inFIG. 2 ; and -
FIGS. 4-7 are detailed views showing sleeve variants. - While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the drawing and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.
- As illustrated in
FIGS. 1 to 3 , the clutch release bearing includes a rollingbearing 1 mounted on anoperating element 2, advantageously made of synthetic material and including acylindrical body 3 and a radial bearingsurface 4. Theoperating element 2 may for example have the shape of a piston of a hydraulic clutch-operating device or of a separate push rod axially extending the said piston. Theoperating element 2 is usually mounted by itsbore 5 onto a stationary guide-tube not shown, while the saidoperating element 2 is capable of moving in translation along the axis of the guide-tube. A free end of theoperating element 2 includes acylindrical portion 6 of lesser thickness than thecylindrical body 3 and provided with anouter surface 7. The radial bearingsurface 4 is placed axially between thecylindrical body 3 and thecylindrical portion 6. Aretention element 8 in the form of an annular rib facing outwards is formed on theouter surface 7 axially opposite theradial surface 4. - The rolling
bearing 1 includes an inner,non-rotating ring 9 with a thin wall made by pressing of a metal sheet or of a tube and having anannular raceway 10 for a row of rollingelements 11 kept regularly spaced from one another in the circumferential direction by acage 12. Theinner ring 9 also includes an extension facing inwards in the form of aradial portion 13 having abore 13 a and acylindrical extension 14 on the side opposite theradial portion 13 relative to the row of balls. Theradial portion 13 is in contact with theradial surface 4 of theoperating element 2. - The rolling
bearing 1 is supplemented by an outerrotating ring 15 also with a thin wall made by pressing a metal sheet or a tube and which has anannular raceway 16 for the rollingelements 11, and aradial portion 17 facing inwards which comes into contact with the surface of adiaphragm 18 of a clutch device in order to actuate it when the clutch release bearing assembly supported by theoperating element 2 is moved axially. The rollingbearing 1 is protected on the side opposite thediaphragm 18 by a sealingelement 19 attached in the bore of theouter ring 15 and having alip 20 coming into friction contact with thecylindrical extension 14 of theinner ring 9. - The clutch release bearing is supplemented by a self-
alignment element 21 in the form of an elastic sleeve. The self-alignment element 21 includes ametal brace 22 made of thin sheet metal and having an annular form with a small diameteraxial portion 22 a adjusted in thebore 13 a of theradial portion 13 of thenon-rotating ring 9, thebore 13 a being formed in the thickness of the saidradial portion 13. A small diameterradial portion 22 b extends theaxial portion 22 a outwards and extends in contact with the face of theradial portion 13 of thenon-rotating ring 9 situated on the side of thediaphragm 18. The small diameterradial portion 22 b extends over a part of the radial height of theradial portion 13, for example, over approximately ⅓ to ⅔. - The
brace 22 includes a large diameteraxial portion 22 c extending towards thediaphragm 18 from the large diameter end of theradial portion 22 b, and a largediameter radial portion 22 d extending outwards from the end of the large diameteraxial portion 22 c axially adjacent to thediaphragm 18. The largediameter radial portion 22 d is flush with the radial plane passing through the outer face of theradial portion 17 of thenon-rotating ring 15. This avoids an increase in the axial bulk of the thrust bearing. - The self-
alignment element 21 is supplemented by abody 23 made of synthetic material, for example of elastomer or of rubber, and attached to thebrace 22, for example by overmoulding. Thebody 23 has a globally rectangular section with two opposite radial faces one of which is in contact with the small diameterradial portion 22 b of thebrace 22 and the other is flush with the radial plane of the outer face of theradial portion 17 of therotating ring 15. Thebody 23 is also delimited by an outer surface in contact with the bore of the large diameteraxial portion 22 c of thebrace 22 and by a bore. From the bore of the body 23 a plurality ofsplines 24 extend facing radially inwards and inclined circumferentially, coming into contact with theouter surface 7 of the reduced thicknesscylindrical portion 6 of theoperating element 2. - In addition, the
splines 24 are retained axially by theannular rib 8 formed at the free end of theouter surface 7. The radial interference between therib 8 and thesplines 24 provides an axial interlocking between the operatingelement 2 and the self-alignment element 21 and therefore with the rollingbearing 1. Theaxial splines 24 extend axially between the radial plane passing through the outer face of theradial portion 17 of therotating ring 15 in contact with thediaphragm 18 and theradial surface 4 of theoperating element 2. - The self-
alignment element 21 also includes aseal 25 including aheel 26 and alip 27 advantageously made of the same material and at the same time as thebody 23. Theheel 26 surrounds the large diameteraxial portion 22 c of thebrace 22 and is delimited axially between the largediameter radial portion 22 d of thebrace 22 and theradial portion 13 of thenon-rotating ring 9. The sealinglip 27 extends outwards and comes into sliding contact with thebore 17 a of theradial portion 17 of therotating ring 15, the said bore 17 a being formed by the thickness of theradial portion 17, blocking off the annular space between therings - In this way, a self-alignment element is made in a single piece, easy to mount on the non-rotating ring by a simple axial fitting movement and particularly compact axially and radially. It is notable in particular that the self-
alignment element 21 fits entirely between the radial plane of contact of thediaphragm 18 with thenon-rotating ring 15 and the radial plane passing through the center of the rollingelements 11. More particularly, the axial end of the self-alignment element 21 close to the rollingelements 11 is flush with a radial plane tangential to the rolling elements, on the side of the rollingelements 11 situated closest to thediaphragm 18. -
FIG. 4 illustrates one embodiment similar to the preceding one except that thebrace 22 has no large diameter radial portion, the large diameteraxial portion 22 c forming a narrow passage with the bore 17 c of theradial portion 17 of therotating ring 15. Theseal 25 is placed on the periphery of the said large diameteraxial portion 22 c and radially between theradial portion 17 of therotating ring 15 and theradial portion 13 of thenon-rotating ring 9. The sealinglip 27 comes into sliding contact with theinternal face 17 b of theradial portion 17 of therotating ring 15 on the side of the rolling elements. In addition, theseal 25 is in contact with theradial portion 13 of thenon-rotating ring 9 and thus provides a static seal. - In the embodiment illustrated in
FIG. 5 , thebrace 22 includes a short, large diameteraxial portion 22 c placed axially between theradial portion 17 and theradial portion 13 and forming a narrow passage with theinternal face 17 b of theradial portion 17. Theradial portion 22 b of thebrace 22 here has an external diameter greater than thebore 17 a of theradial portion 17. Theseal 25 is made in one piece with thebody 23, the function of the heel being provided by the saidbody 23. The sealinglip 27 comes into sliding contact with thebore 17 a of theradial portion 17. Thebody 23 must have a radial thickness sufficient to avoid an excessive pressure of the sealinglip 27 because of the possible deformation of thebody 23 under the pressure of thesplines 24. - In the embodiment illustrated in
FIG. 6 , the large diameteraxial portion 22 c of thebrace 22 is placed axially between theradial portion 17 of therotating ring 15 and theradial portion 13 of therotating ring 9. Theradial portions body 23 is therefore mostly placed between theradial portions body 23 includes, in addition, close to its bore, anannular rib 28 projecting axially towards the diaphragm and forming a narrow passage with thebore 17 a of theradial portion 17 of therotating ring 15. - The embodiment in
FIGS. 4 to 6 therefore shows a self-alignment element fitted with two sealing means, one by narrow passage, and the other friction, which further increases the overall effectiveness of the seal of the rolling bearing. - In the embodiment illustrated in
FIG. 7 , thebrace 22 includes anaxial portion 22 a fitted into thebore 13 a of theradial portion 13 of thenon-rotating ring 9, aradial portion 22 e facing outwards from the end of theaxial portion 22 a opposite theradial portion 17 and extending over a part of the length of theradial portion 13 while being in contact with the latter. Thebrace 22 is supplemented by a rim 22 f situated in the extension of theaxial portion 22 a, on the side opposite theradial portion 22 e and slightly bent inwards. Thebody 23 and theseal 25 are made in one piece, thebody 23 covering the inner surface of theportions 22 a and 22 f of thebrace 22 and theseal 25 covering the free end and the periphery of the portion 22 f. Theportions 22 a and 22 f provide the rigidity of thebody 23. The sealinglip 27 extends outwards towards theface 17 b of theradial portion 17 situated opposite theradial portion 13. Theribs 24 are formed from the bore of thebody 23. Naturally, as a variant, additional sealing can be provided by a friction seal on thebore 17 a or yet by narrow passage. The shape of thebrace 22 is here particularly simple and hence low cost. - In this embodiment, when the rolling bearing is mounted on the
operating element 2, theradial portion 22 is axially sandwiched between theradial portion 13 of theinner ring 9 and theradial bearing surface 4 of the operating element. - An embodiment provides a self-alignment sleeve an axial part of which is in contact with the bore of a radial portion of the non-rotating ring while a radial portion is in contact with the radial surface of the same radial portion of the non-rotating ring to form a compact element performing the functions of elastic self-alignment and sealing by the mounting of a single piece including a metal brace and a flexible part and involving an axially delimited space on the side of the diaphragm by the radial plane passing through the diaphragm zone of contact with the rotating ring and on the side of the rolling elements by a radial plane passing through the center of the rolling elements. Thus the benefit is a sleeve with elastic ribs which provides an excellent self-alignment and a high reliability while benefiting from a greatly reduced axial bulk.
- Further modifications and alternative embodiments of various aspects of the invention may be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as the presently preferred embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description to the invention. Changes may be made in the elements described herein without departing from the spirit and scope of the invention as described in the following claims. In addition, it is to be understood that features described herein independently may, in certain embodiments, be combined.
Claims (8)
1-14. (canceled)
15. A clutch release bearing device comprising:
an inner non-rotating ring comprising a thin wall made by pressing of a metal sheet or a tube having an annular raceway for a row of rolling elements and an extension facing inwards in the form of a radial portion having a bore defining a circular central opening, said radial portion being configured to couple with a radial surface of an operating element;
an outer rotating ring comprising a thin wall made by pressing of a metal sheet or of a tube having an annular raceway for said row of rolling elements and a radial portion facing inwards configured to couple with a surface of a diaphragm of the clutch device; and
an elastic sleeve element comprising a thin sheet metal brace and a body of synthetic material with a plurality of splines extending radially inwards, configured to couple with an outer surface of said operating element;
wherein said metal brace comprises an axial portion adjusted in said bore of said radial portion of said inner non-rotating ring and a radial portion coupled to said radial portion of said inner non-rotating ring; and
wherein the elastic sleeve element comprises a sealing lip interacting with the rotating ring; and
wherein said elastic sleeve element entirely fits, during use, between a radial plane of contact of a diaphragm of the clutch device with the non-rotating ring and a radial plane passing through the center of the rolling elements.
16. Device according to claim 15 , wherein the sealing lip interacts with a radial surface of the rotating ring formed on a radial portion of the rotating ring facing inwards.
17. Device according to claim 15 , wherein the elastic sleeve element comprises an axial portion forming a narrow passage with the rotating ring.
18. Device according to claim 15 , wherein said metal brace comprises a second axial portion and said sealing lip is located on said second axial portion.
19. Device according to claim 15 , wherein the sealing lip interacts with a circular axial surface of the rotating ring formed by the bore of a radial portion facing towards the interior of the rotating ring.
20. Device according to claim 15 , wherein the sealing lip is made in one piece with the body of the sleeve.
21. Device according to claim 15 , wherein the rotating ring and non-rotating ring have a substantially constant thickness.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/978,183 US20110194800A1 (en) | 2003-10-14 | 2010-12-23 | Clutch release bearing device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0311989A FR2860847B1 (en) | 2003-10-14 | 2003-10-14 | CLUTCH STOPPING DEVICE |
FRFR0311989 | 2003-10-14 | ||
US10/965,679 US7878714B2 (en) | 2003-10-14 | 2004-10-14 | Clutch release bearing device |
US12/978,183 US20110194800A1 (en) | 2003-10-14 | 2010-12-23 | Clutch release bearing device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/965,679 Division US7878714B2 (en) | 2003-10-14 | 2004-10-14 | Clutch release bearing device |
Publications (1)
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US20110194800A1 true US20110194800A1 (en) | 2011-08-11 |
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US10/965,679 Expired - Fee Related US7878714B2 (en) | 2003-10-14 | 2004-10-14 | Clutch release bearing device |
US12/978,183 Abandoned US20110194800A1 (en) | 2003-10-14 | 2010-12-23 | Clutch release bearing device |
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Application Number | Title | Priority Date | Filing Date |
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US10/965,679 Expired - Fee Related US7878714B2 (en) | 2003-10-14 | 2004-10-14 | Clutch release bearing device |
Country Status (5)
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US (2) | US7878714B2 (en) |
AR (1) | AR046178A1 (en) |
DE (1) | DE102004049787A1 (en) |
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IT1320364B1 (en) | 2000-05-25 | 2003-11-26 | A E Assemblaggi Elettromeccani | WEAR SENSOR DEVICE OF A DRIVE BELT OR CHAIN, IN PARTICULAR FOR A DRIVE SHAFT OF THE DRIVE SHAFT |
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DE10042677A1 (en) | 2000-08-31 | 2002-03-14 | Schaeffler Waelzlager Ohg | Bearing for rotatable support of a spring seat in motor vehicle suspension struts comprises a housing consisting of top and bottom components which are provided with low-friction contact zones |
FR2813647B1 (en) * | 2000-09-01 | 2002-12-20 | Skf France | RELEASE STOP DEVICE |
FR2813644B1 (en) | 2000-09-06 | 2003-01-24 | Skf France | INSTRUMENTED ROLLING BEARING DEVICE, PARTICULARLY FOR CONTROL WHEEL |
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-
2003
- 2003-10-14 FR FR0311989A patent/FR2860847B1/en not_active Expired - Fee Related
-
2004
- 2004-10-12 DE DE102004049787A patent/DE102004049787A1/en not_active Withdrawn
- 2004-10-12 AR ARP040103680A patent/AR046178A1/en active IP Right Grant
- 2004-10-13 ES ES200402430A patent/ES2257941B1/en not_active Expired - Fee Related
- 2004-10-14 US US10/965,679 patent/US7878714B2/en not_active Expired - Fee Related
-
2010
- 2010-12-23 US US12/978,183 patent/US20110194800A1/en not_active Abandoned
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011082329A1 (en) * | 2011-09-08 | 2013-03-14 | Schaeffler Technologies AG & Co. KG | Bearing ring for steering bearing of vehicle, has rolling track for balls of steering bearing, where rolling track is curved circumferentially around rotation axis of bearing ring |
Also Published As
Publication number | Publication date |
---|---|
US20050265646A1 (en) | 2005-12-01 |
DE102004049787A1 (en) | 2005-05-12 |
FR2860847A1 (en) | 2005-04-15 |
FR2860847B1 (en) | 2006-03-31 |
ES2257941A1 (en) | 2006-08-01 |
ES2257941B1 (en) | 2007-06-16 |
AR046178A1 (en) | 2005-11-30 |
US7878714B2 (en) | 2011-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |