EP1287266A1 - Instrumented antifriction bearing for control wheel - Google Patents
Instrumented antifriction bearing for control wheelInfo
- Publication number
- EP1287266A1 EP1287266A1 EP01940662A EP01940662A EP1287266A1 EP 1287266 A1 EP1287266 A1 EP 1287266A1 EP 01940662 A EP01940662 A EP 01940662A EP 01940662 A EP01940662 A EP 01940662A EP 1287266 A1 EP1287266 A1 EP 1287266A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial
- rotating part
- rotating
- fixing
- axial
- 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- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 description 16
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001531957 Opsariichthys uncirostris Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
-
- 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- 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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/04—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders
- F16D55/06—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders without self-tightening action
-
- 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
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/02—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together
- F16F7/04—Vibration-dampers; Shock-absorbers with relatively-rotatable friction surfaces that are pressed together in the direction of the axis of rotation
-
- 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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C2326/00—Articles relating to transporting
- F16C2326/20—Land vehicles
- F16C2326/24—Steering systems, e.g. steering rods or columns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20207—Multiple controlling elements for single controlled element
- Y10T74/20256—Steering and controls assemblies
- Y10T74/20262—Rotary control shaft
Definitions
- the present invention relates to the field of instrumented assemblies of the kind for handwheels for control or maneuvering used for example for the steering of motor vehicles, handling machines or public works machines, or all other types of machines or machines requiring a handwheel.
- a control wheel is connected to an axis, for example a steering column axis, which, depending on the type of steering used, actuates the steering mechanism directly in rotation in the case of mechanical steering, actuates hydraulic pressure distributors in the case of a hydraulic steering or, finally, in the case of an electric steering, actuates the coding ring of a sensor device delivering a signal to the electric control motor, various combinations of these types being possible.
- an axis for example a steering column axis
- a steering wheel rotation detection system In the case of a purely electric steering, more and more commonly used for handling machines such as forklifts.
- a steering wheel rotation detection system whether integrated into the bearings or not, delivers a signal representative of the steering wheel rotation to the vehicle's wheel orientation device.
- the flywheel being mounted on its support by one or more rolling bearings and not being linked to mechanical torque transmission systems, the flywheel is rotated with an extremely low resistive torque. So we often add a steering wheel braking system to generate a resistant torque in order to promote the precision and comfort of driving. vehicle.
- a device of this type is described for example in the document DE-A-
- this device has certain drawbacks, among which we will note first of all the relatively high axial size and cost due to the presence of two bearings in the extension of which is arranged a brake system using a spring. with a flange pressing a conical friction piece in a bowl also comprising a conical friction surface. The friction torque developed by such a device is relatively reduced and significant wear due to the small friction surfaces. In addition, the braking system changes the operating clearance of the bearings.
- Document FR-A-2 782 970 discloses a control wheel mounted on an instrumented bearing and to which is added a braking system the rotating part of which is supported by the rotating inner ring of the bearing and rubs against the bottom of a housing.
- the bearing is not mounted on an axis and the diametrical size of the bearing and of the device is significant.
- the flywheel includes a radial part and an axial part for fixing to the rolling bearing. The steering wheel therefore has a large axial size.
- the invention proposes to remedy the drawbacks of the devices of the prior art.
- the invention provides an economical and space-saving device radially.
- the instrumented rolling bearing device is of the type for a control wheel, comprising an external part, an internal part, one being rotating and the other non-rotating, a row of elements. rollers arranged between said rotating and non-rotating parts.
- the device further comprises means for detecting the rotation parameters.
- the rotating part is provided at one of its axial ends with fixing means making it possible to ensure the fixing and the angular connection of said rotating part on a handwheel, the non-rotating part comprising a radial surface provided with fixing means on a support.
- the means for fixing the handwheel to the rotating part are arranged from a substantially radial surface of the rotating part.
- the means for fixing the non-rotating part are arranged radially at a distance from the axis of rotation of the upper rotating part or substantially equal to the distance between the means for fixing the radial surface of the rotating part and l 'rotation axis.
- the means for fixing the non-rotating part do not hinder access to the area of the axis of rotation of the rotating part, whether the non-rotating part is the outer part or the inner part of the braked bearing.
- the means for fixing the non-rotating part also make it possible to easily mount the instrumented rolling bearing on a support wall, possibly integrating the instrumented rolling bearing in a housing of the support wall, so that the rolling bearing instrumented as a whole is located on a first side of the support wall on which it is fixed, while the control member associated with the braked bearing is located axially on the opposite side.
- the rotating part comprises an axial portion provided with a radial surface, in which at least one fixing hole is made.
- the rotating part comprises a tubular portion, and a radial portion extending radially inwards from one end of the tubular portion, the radial portion being provided with at least one fixing hole. .
- the rotating part comprises a tubular portion, and a radial portion extending radially outward from one end of the tubular portion, the radial portion being provided with at least one fixing hole.
- the non-rotating part comprises a tubular portion, a radial portion extending radially outward from one end of the tubular portion, the radial portion being provided with at least one fixing hole.
- the radial portion of the non-rotating part is located substantially in the same radial plane as the radial surface of the rotating part.
- the non-rotating part comprises a central through hole allowing the passage of an axis.
- the rotating and non-rotating parts each comprise a raceway, between which the rolling elements are arranged.
- the rotating parts and not rotating each comprise a ring, between which are arranged the rolling elements.
- the device comprises braking means comprising a plurality of discs held in friction contact by at least one resilient element axially.
- the device comprises braking means comprising a seal in friction contact with a cylindrical surface.
- This instrumented bearing device easily adapts and mounts in " many possible locations of a vehicle or machine, for example on a dashboard, via the housing forming a support. A few screws are sufficient for the fixing of the device and of its rotation drive by the handwheel or control wheel.
- the means for fixing the non-rotating part are judiciously placed so as not to impede access in the area of the axis of rotation of the rotating part , and so as to allow the integration of the rolling bearing in a dashboard for example.
- FIG. 1 is an axial sectional view of a bearing device
- FIG. 2 is a sectional view along II-II of Figure 1 of the bearing device;
- - Figure 3 is an axial sectional view of a second embodiment of the bearing device;
- FIG. 4 is an axial sectional view of a third embodiment of the bearing device
- FIG. 5 is an axial sectional view of a fourth embodiment of the bearing device
- FIG. 6 is an axial sectional view of a fifth embodiment of the bearing device
- the rolling bearing device comprises an external element 1, of annular shape, with half-section in L, with a tubular portion 2 and a radial portion 3 extending at one end of the tubular portion towards the outside.
- the radial portion 3 comprises a surface 3a oriented on the side of the tubular portion 2 and provided with a plurality of fixing holes 4 passing through the wall 3 able to receive screws for attachment to a fixed frame.
- the tubular portion 2 is provided with two notches forming slots 5 extending from the free end of said tubular portion 2, located opposite the radial portion 3.
- the slots 5 are rectangular, their length extending parallel to the axis referenced 6, which is the axis of rotation of the rotating part, on which the external element 1 is centered.
- the external element 1 can be made of stamped or folded sheet metal.
- the rolling bearing device also comprises an inner element 8, also centered on the axis 6, of annular shape with U-section, having a tubular portion 9 of which one end is closed by a radial portion 10 extending radially towards the inside from one end of the tubular portion 9.
- a plurality of holes 11 are provided through the radial portion 10 to receive screws, for example intended for fixing a handwheel.
- the inner element 8 can also be made of stamped sheet metal. Between the exterior 1 and interior 8 elements, is arranged a row of rolling elements 12 held by a cage 13.
- An exterior ring 14 is fitted into the bore 2a of the tubular portion 2 of the exterior element 1 and is provided with a raceway 16 for the rolling elements 12.
- An inner ring 15 is fitted on the outer surface 9a of the tubular portion 9 of the interior element 8 and is provided with a raceway 17 for the rolling elements 12.
- the outer ring 14 is further provided with two symmetrical annular grooves 18 and 19 formed on its bore, on either side of the raceway 16.
- In the groove 18, is fixed a sealing member 20 which rubs against a bearing surface of the inner ring 15.
- In the groove 19 is fixed a sensor block referenced 21 as a whole.
- the sensor block 21 comprises two detection elements 22, 23 arranged in diametrically opposite directions and each embedded in a synthetic material forming a central part 24 of the sensor block 21.
- the fixing of the sensor block 21 on the front face of the outer ring 14 is made by means of a fixing support interposed between the ring 14 and the sensor block 21, both on the radial parts and on the circumferential parts and of which a free end is folded back in the groove 19 .
- a cylindrical annular portion 24a is inserted partially inside the bore of the non-rotating ring 14 substantially at the level of the groove 19, so that the detection elements 22, 23 can be partially disposed between the two rings 14 and 15.
- An external protection plate 26 is also fixed to the outside of the sensor unit 21 by crimping carried out by folding the other free end 25a of the support 25 onto the periphery of the external protection plate 26.
- the sensor block 21 further comprises two wired terminals 27 and 28, associated respectively with the detection elements 22 and 23, and formed by a protuberance of the synthetic material from the central part 24 to ensure the fixing of the end of a cable 29 , 30 by which a transmitted signal can be retransmitted to an electronic central processing and processing of the signal, not shown in the figures.
- the wired terminals 27, 28 of the sensor unit 21 each protrude through a slot 5 in the tubular portion 2 of the external element 1 while being in contact with the bottom of said slots 5.
- the two detection elements 22, 23 each cooperate with a single coding ring 31 mounted opposite the sensor block 21 on the external cylindrical surface of the rotating ring 15, so as to be driven in rotation by the latter.
- the assembly of the encoder ring 31 is done by means of a support 32 which is housed partly between the rings 14 and
- the support 31 of annular shape with T-section, is fitted on the outer cylindrical surface of the rotating ring 15 and abuts against a front surface of the latter. A portion of the encoder ring 31 is thus located between the rings 14 and 15 and a portion projects outside. Most of the outer cylindrical surface of the encoder ring 31 is located opposite the two detection elements 22, 23 with a slight air gap.
- a bearing is thus formed by the rolling elements 12 and raceways made on the axial surfaces of the rings 14 and 15.
- To this bearing can be added one or more seals, one or more encoders, one or more sensors , etc.
- a braking member 33 is also disposed between the outer surface 9a of the tubular portion 9 of the inner member 8 and the bore 2a of the tubular portion 2 of the outer member 1.
- the braking member 33 is disposed in the axial extension of the bearing provided with its rotation parameter detection system and is located axially between the free end of the tubular portion 9 of the inner element 8 and the plate 26 protecting the sensor unit 21. More generally, the braking member 33 is axially limited by the cover 7, since it could be provided that it projects axially beyond the free end of the tubular portion 9 in the direction of said cover 7.
- the braking member 33 comprises a rotating part 33a formed by two elements 34, 35, of similar shape, and each comprising a tubular axial portion 34a, 35a and a radial portion 34b, 35b in the form of a disc.
- the non-rotating part 33b of the braking member 33 comprises two metal discs 36 and 37, arranged axially between the radial portions 34b and 35b of the rotating part 33a. Between the discs 36 and 37, an axially elastic washer 38 is disposed. A friction disc or coating 39 is interposed axially between the disc 36 and the disc-shaped radial portion 34b.
- This friction disc or coating is made of a material with a high coefficient of friction with the fixed discs 41 and the radial portion 34b. If it is a coating, it is preferably adhered to the disc 41 and rubs against the radial portion 34b. It is the same for the friction lining 40, the disc 37 and the radial portion 35b.
- the discs 36 and 37 each comprise two pins 41, 42 in projecting radially outwards, diametrically opposite and each arranged in a lumen 5 of the tubular portion 2 of the external element 1.
- the discs 36 and 37 are angularly integral with the external element 1 due to the presence of the pins
- the discs 36, 37 are therefore fixed while the lateral elements 34, 35 are rotating.
- the friction contact between the fixed discs and the rotating elements via the friction discs or coatings 39, 40 therefore creates a resistant torque.
- the elastic washer 38 permanently maintains an axial force tending to separate the discs 41 and 42 and thus ensuring the friction of the discs or friction coatings 39 and 40 on the corresponding surfaces of the radial portions 34b and 35b of the rotating part 33a of the braking device 33.
- a control member in the form of an operating handwheel 44 comprises a toric grip part 45 secured to a support part 46 having a cup shape with a radial part 47 whose free end of large diameter supports the gripping part 45 and a central part 48 extending radially inwards from the internal edge of the radial part 47.
- the central part 48 has a surface 48a in contact with a surface 10a of the portion radial 10 oriented on the side opposite to the cover 7.
- Fastening members 49 and 50 symbolized by lines to improve the clarity of the drawing, cooperate with the holes 11 of the radial wall 10 to allow the fixing of the handwheel 44 on the part rotating interior 8 and to ensure the rotational drive of the rotating part 8 by the handwheel 44.
- the fixing members 49 and 50 may for example be screws provided on their outer surface of a thread cooperating with a thread formed on the bores of the holes 11 in the radial wall 10.
- a support wall 51 extending in a radial plane, has a surface 51a oriented on the side of the handwheel 44, bearing on the surface 3a of the radial portion 3.
- the support wall 51 has an axial hole 52 allowing the axial passage of the tubular portion 2 of the external element 1, while preventing the axial passage of the radial portion 3 of the external element 1.
- the external element 1 can be brought, by passing the tubular portion 2 axially in the axial hole 52 of the wall support 51, until the radial surface 3a of the radial wall 3 abuts on the surface 5a of the support wall 51.
- Fastening elements 53, 54 cooperate with the fixing holes 4 of the radial surface 3 a, to allow the external element 1 to be fixed on the support wall 51.
- the instrumented rolling bearing device is thus in the form of a compact cartridge arranged radially between the fixed external element 1 and the rotating internal element 8, in the axial extension and in the immediate vicinity of the instrumented bearing.
- the means for fixing the non-rotating external element, arranged on a radial surface of the radial portion 3, make it possible to mount the instrumented rolling bearing so that it is located on a first side of the support wall 51 then the flywheel is on the opposite side while keeping the braked bearing simple on its support.
- the instrumented rolling bearing can thus be integrated into the support to reduce the size of the instrumented rolling bearing and to ensure better protection of the instrumented rolling bearing.
- the various functions, in particular those of bearing provided by the rolling elements 12, of detection of parameters of rotation provided by the sensor unit 21 and of braking provided by the braking member 33, are carried out by means arranged in a limited annular space , radially between the tubular portion 2 of the outer element 1 and the tubular portion 9 of the inner element 8 and axially between the radial portion 34a of the element 34 of the braking member 33 and the front surface of the rings 14 and 15 opposite the sensor block 21.
- the rolling elements 12, the parameter detection means and the braking means are axially adjacent in pairs, so that the braked rolling bearing has a small axial size. More specifically, in this embodiment, the braking means is adjacent to the detection means, the detection means being adjacent to the rolling elements 12.
- the mounting of the different elements can be carried out in engaging the bearing and the braking member 33 on the inner member 8, then bringing the outer member 1 from the right to the left in Figure 1, which causes the fitting of the outer ring 14 in the bore 2a, the passage of the wired terminals 27 and 28 in the slots 5 and the passage of the lugs 41 to 42 also in the same slots 5.
- the cover 7 is then fixed on the external element 1.
- the lights 5 which may alternatively be of a number different from two, ensure both the passage of the cables 28 and 29 and the angular connection of the non-rotating part 33b of the braking member 33 and the external element 1.
- the various elements are all simple in shape.
- the bearing can be of the standard type and therefore very inexpensive.
- the braking member can be made from sheet metal parts which are also inexpensive.
- the fixing of the handwheel 44 can be carried out easily on the inner rotating element 8.
- the use of an element 8 intermediate between the instrumented rolling bearing and the handwheel 44 makes it possible to simplify the handwheel 44 and its fixing.
- the handwheel has a gripping part 45 and a radial part 47, so that the handwheel 44 has a very small axial size, which facilitates its storage and transport, and allows cost savings. in the manufacture and installation of the instrumented rolling bearing and the handwheel 44. In addition, there is less risk of damaging the flywheel during its transport, since it does not have a projecting axial part.
- FIG. 3 the references relating to similar elements have been used.
- the outer element 1 has on the bore 2a of the tubular portion 2 a raceway 55 obtained by deformation of said tubular portion 2.
- the outer surface 9a of the tubular portion 9 comprises a raceway 56 obtained by deformation of said tubular portion 9, radially in track 55.
- the rolling elements 12 are disposed directly between the path 55 of the outer element 1 and the path 56 of the inner element 8.
- the braked bearing is thus lighter and more compact radially.
- the cylindrical annular portion 24a of the sensor block 21 is here directly fitted into the bore 2a of the tubular portion 2 of the external element 1.
- the support 32 of the encoder ring 31 is directly fitted onto the external surface 9a of the portion tubular 9, axially in abutment on the axial end of the tubular portion 9.
- the sealing member 58 comprises an axial portion 59 fitted into the bore 2a of the tubular portion 2 of the external element 1, and a radial portion 60 extending radially inwards from one end of the axial portion 59 opposite the rolling elements 12.
- a lip seal 61, overmolded on the smaller diameter area of the radial portion 60 of the metal frame 58 has three lips 62 contacting dynamic friction on the outer surface 9a of the tubular portion 9 of the inner member 8.
- the special structure of the braked rolling bearing gives it a reduced axial size.
- the holes 4 of the radial surface 3a of the external element 1 allow the fixing of the external element 1 on a support wall 51.
- the holes 11 of the radial wall 10 of the internal element 8, which is here l 'rotating element, allow the fixing of an operating wheel 44, and the mutual rotation drive between the operating voalnt 44 and the rotating part, here the internal element 8.
- the use of a sealing member 57 having a lip seal 61 in dynamic friction contact on the outer wall 9a of the radial portion 9 of the inner member 8, and integral with the outer member 1, allows both to seal the bearing while generating a friction force which opposes the rotation of the inner element 8 in the outer element 1.
- the braking means which is the sealing member 57, fixed directly to the external element 2, is axially adjacent to the rolling elements 12. Different arrangements of the braking means, detection means and of the row of rolling elements 12 can be envisaged, while leaving these axially adjacent elements two by two, in order to obtain an improved axial compactness .
- This particular embodiment makes it possible to obtain the braked rolling bearing at low cost, from elements produced economically by cutting, stamping, rolling and heat treatment.
- the external element 1 in the form of an annular cup comprises a tubular portion 2 having a bore 2a, and an annular radial surface 2b situated axially on the side of the handwheel 44, and in contact with a surface 5 lb of the support wall 51 opposite the surface 51a of the support wall 51.
- the annular surface 2b is provided with 2 axial threaded holes 65 radially distant.
- a radial portion 63 extends radially inwards from the end of the tubular wall 2 opposite the annular surface 2b, and axially closes the bore 2a of the tubular wall 2 while comprising two axial holes 64, radially distant, located axially opposite the detection elements 22, 23.
- the sensor block 21 comprises an annular bead 66 projecting into the annular groove 19 of the ring 14, so as to fix the sensor block 21 on the ring 14.
- the wired terminals 27, 28 of the sensor unit 21 protrude axially, from the detection elements 22, 23, through the axial holes 64 of the radial wall 63.
- the internal element 8 here consists of a solid cylindrical part 67 , comprising a cylindrical outer surface 67a, and provided at its axial end opposite the radial wall 63 with a radial surface 68.
- Two axial threaded holes 69, 70 formed in the radial surface 68 allow the fixing n of the operating wheel 44 on the internal element 8, the central portion 48 of the operating wheel 44 being in contact with the radial surface 68 of the cylindrical axial portion of the internal element 8.
- the ring 15 is still fitted on the outer surface 67a of the cylindrical axial portion 67.
- a sealing and braking member has a first annular element 71 with an L-shaped section, comprising an axial portion 72 fitted on the outer surface 67a of the cylindrical axial portion 67, and a radial portion 73 extends radially outward from the end of the axial portion opposite the rings 14 and 15.
- a second annular element 75 similar to the first annular element 71 comprises an axial portion fitted into the bore 2a of the tubular portion 2, a radial portion 76 extending radially inwards from one end of the axial portion 74, on the side of the ring 14 The radial portion 73 of the first annular element 71 comes close to the axial portion 74 of the second annular element 75.
- a support portion 77 extends from the zone of smaller diameter of the radial portion 76, radially towards the inside, obliquely on the side opposite to the ring 14.
- a seal 78 overmolded on the zone of smaller diameter of the support portion 77 comprises a lip 79, having a V-shaped half-section, in contact with an outer surface 72a of the axial portion 72 of the first element 71, and also in contact with a radial surface 73a of the radial portion 73 of the first element 71, oriented on the side of the ring 14.
- the lip 79 is held in contact with the axial portion 72 by means of a spring ring 80 introduced into the opening of the V-shaped section of the lip 79, so that said contact between the lip 79 and the external surface of the axial portion 72 creates a friction torque opposing the rotation of the handwheel 44.
- the seal performs a sealing function and a braking function.
- a tight passage seal is produced between the radial wall 73 of the first element 71 and the axial wall 74 of the second element 75, the radial wall 73 coming radially near the axial wall 74.
- the braked rolling bearing has a small axial size.
- the annular surface 2b extending in a radial plane, and provided with threaded holes 65 able to cooperate with the support wall 51, makes it possible to have the rolling bearing axially braked on a first side of the support wall 51, while by bringing, and fixing the handwheel 44 axially on the side of the wall 51 opposite the braked rolling bearing.
- the means for fixing the non-rotating external element which are the holes 65, being located at a distance from the axis 6 of rotation of the internal element 8 greater than the distance from the rolling elements 12 to the axis of rotation, do not hinder access to the axis of rotation of the rotating part for fixing the steering wheel.
- FIG. 5 illustrates an embodiment in which the internal part is the non-rotating part, the external part being the rotating part.
- the external element 1 has a tubular portion 2 and a radial portion 3 provided with a plurality of holes 4.
- a radial portion 85 extends radially inward from the end of the axial portion 2 opposite the radial portion 3, leaving a central hole 86 free.
- the operating wheel 44 comprises a toric gripping member 45, and a radial portion 87 whose zone of larger diameter supports the gripping member 45, and extending in a radial plane, while leaving a hole 88 coaxial with the external element, the zone of smaller diameter of the radial portion 87 lying axially opposite the holes 4 of the radial portion 3 of the external element 1.
- L interior element 8 has a tubular portion 91, one axial end of which lies in the radial plane of the radial wall 3 of the external element 1, the tubular portion 91 extending axially on the side of the radial portion 85 of the external element 1, at beyond the radial portion 85 of the outer element 1.
- the axial portion 91 comprises on its outer surface a bearing 92, on the side of the radial portion 3 of the outer element 1, extending axially up to near the radial portion 85 of the external element 1, and forming a radial shoulder 93.
- the ring 15 is fitted on the bearing 92 of the axial portion 91, and comes axially into abutment on the radial shoulder 93.
- the inner element 8 comprises a radial bearing portion 94, extending radially outward from the axial end of the axial portion 91 opposite the bearing 92.
- the axial bearing portion 94 includes gold ifices 95 substantially opposite the holes 4.
- the radial support plate 94 is supported on a surface 51a of a radial support wall 51.
- Fastening members 96 for example a screw or a screw-nut system allow the fixing of the inner element 8 on the support wall 51, cooperating with the orifices 95 of the radial bearing wall 94.
- the ring 14 is fitted into the bore 2a of the axial portion 2 of the external element 1.
- the ring 14 is here associated with the external element 1 which is the rotating element.
- the encoder ring 31 is integral with the ring 14, and comprises a sheet metal support formed by a radial portion
- the radial portion 99 has a free end 99a which is curved and which is received in the annular groove 19 of the ring 14, to fix the encoder ring 31 on the ring 14.
- the active part 100 is secured to the inner wall of the axial portion 98.
- the sensor block 21 comprises an axial portion 101 having a radial end surface 101a coming axially into abutment on a front surface of the ring 15.
- a radial portion 102 extends radially outward, from the end of the axial portion 101 adjacent to the ring 15.
- An axial portion 102a extending from the area of larger diameter of the radial portion 102 is fitted onto the outer surface of the ring 15.
- the sensor block 21 further comprises two wire terminals 104 and 105, associated respectively with the detection elements 22 and 23, and projecting axially of the axial portion 101 of the sensor block 21, and passing through holes 106 made in the radial bearing portion 94 of the inner element 8 ..
- the hole 88 of the handwheel 44 and the bore 91a of the portion tubular 91 can optionally be used for housing and fixing an operating or control indicator, such as a speed indicator, or a warning light.
- the handwheel has a grip part and a radial part 87, so that the handwheel 44 is flat, which facilitates its storage and transport.
- FIG. 6 shows an embodiment in which the inner rotating element 8 is presented as a solid part of revolution, having on the side opposite to the handwheel 44 a surface outer 109a on which is fitted the ring 15.
- the inner element 8 comprises an annular ring 110 of rectangular section, forming a shoulder 111 oriented on the side of the ring 15, and on which the ring 15 comes to bear axially.
- the annular flange 110 comprises a radial surface 112 lying in the plane of the radial end surface of the radial portion 3 of the external element 1.
- the annular flange 110 also comprises a surface cylindrical outer 113, opposite the bore 2a of the axial portion 2 of the outer element 1.
- the annular flange 110 extends radially beyond the outer ring 15.
- the inner element 8 comprises a frustoconical fixing portion 109a projecting axially from the annular flange lO and provided at its end with a radial surface 109b.
- Two threaded holes 114, 115 formed axially in the radial surface 109b of the fixing portion 109a are able to cooperate with fixing members 116, 117 to fix the radial portion 48 of the handwheel 44.
- a seal 118 disposed between the axial portion 2 of the outer element 1 and the annular flange 110 of the inner element 8, comprises an axial portion 119 abutting on a front wall of the ring 14.
- the axial portion 119 s extends axially to the plane of the end surface of the radial portion 3 of the external element 1.
- the seal 118 comprises a radial portion 120 extending radially inward from the end of the portion axial 119 opposite the ring 14, in the direction of the annular flange 110, being extended radially by a lip 121 coming into friction contact with the cylindrical outer surface 113 of the annular flange 110.
- the seal 118 has a second axial portion 122 extending axially towards the ring 14 from the zone of smallest diameter of the radial portion 120, and having at its end axially opposite the lip 121 a second lip 123 in friction contact with the cylindrical outer surface 113 of the annular flange 110.
- the lip 123 is kept in contact with the cylindrical outer surface 113 of the annular flange 110 by means of a spring ring 124 located substantially in the same radial plane as the lip 123, in an annular groove 125 with a V-section formed in the outer surface of the axial portion 122.
- the seal 118 is fitted into the bore 2a of the axial portion of the outer element 1, so that it is integral in rotation with the external element 1.
- the seal 118 having two lips 121,
- the sensor unit 21 includes an annular portion 126 bearing axially on the end of the axial portion of the external element 1 opposite the radial wall 3, and on an adjacent front wall of the ring 14.
- An annular bead 127 projects into the annular rib 19 of the ring 14, and ensures the fixing of the sensor block 21 on the ring 14.
- the sensor block 21 comprises a radial wall 128 forming a cover extending radially inwards from the end of the annular portion 126, so as to close the sensor unit 21 axially.
- the means for fixing the non-rotating external element 1, arranged on the radial wall 3, are located at a distance from the axis of rotation of the rotating internal element greater than the distance from the rolling elements to said axis of rotation.
- the external element does not hinder access to the axis of rotation for fixing the steering wheel.
- the rolling bearing is of reduced axial size, and is obtained from a limited number of parts.
- the braked rolling bearing can therefore be obtained at low cost.
- the braked rolling bearing having fixing means arranged on the rotating part, and means for fixing arranged on the non-rotating part, can be easily integrated into a mechanical sub-assembly comprising an electrical transmission system from a control wheel. It is sufficient to fix by means of a few screws the bearing device instrumented on a support frame, said device then being ready to receive a control wheel whose choice of shape and external dimensions belongs to the user.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Rolling Contact Bearings (AREA)
- Steering Controls (AREA)
- Braking Arrangements (AREA)
Abstract
The invention concerns an instrumented antifriction bearing, for control wheel, comprising an outer part (1), an inner part (8), one rotating and the other non-rotating, a row of rolling elements (12) arranged between said rotating and non-rotating parts, the device further comprising means for detecting rotation parameters. The invention is characterised in that the rotating part is provided at one of its axial ends with means for fixing and angularly linking said rotating part on a control wheel, the non-rotating part comprising a radial surface (3a) provided with means for being fixed on a support.
Description
PALIER A ROULEMENT INSTRUMENTE POUR VOLANT DEINSTRUMENT BEARING FOR STEERING WHEEL
COMMANDEORDERED
La présente invention concerne le domaine des ensembles instrumentés du genre pour volants de commande ou de manoeuvre utilisés par exemple pour la direction de véhicules automobiles, d'engins de manutention ou d'engins de travaux publics, ou de tous autres types d'engins ou de machines nécessitant un volant de commande.The present invention relates to the field of instrumented assemblies of the kind for handwheels for control or maneuvering used for example for the steering of motor vehicles, handling machines or public works machines, or all other types of machines or machines requiring a handwheel.
De façon classique, un volant de commande est relié à un axe, par exemple un axe de colonne de direction, qui, suivant le type de direction utilisé, actionne directement en rotation le mécanisme de direction dans le cas d'une direction mécanique, actionne des distributeurs de pression hydraulique dans le cas d'une direction hydraulique ou, enfin, dans le cas d'une direction électrique, actionne l'anneau codeur d'un dispositif de capteur délivrant un signal au moteur électrique de commande, diverses combinaisons de ces types étant possibles.Conventionally, a control wheel is connected to an axis, for example a steering column axis, which, depending on the type of steering used, actuates the steering mechanism directly in rotation in the case of mechanical steering, actuates hydraulic pressure distributors in the case of a hydraulic steering or, finally, in the case of an electric steering, actuates the coding ring of a sensor device delivering a signal to the electric control motor, various combinations of these types being possible.
Dans le cas d'une direction uniquement électrique, de plus en plus couramment utilisée pour des engins de manutention tels que des chariots élévateurs. Un système de détection de la rotation du volant, intégré ou non aux roulements, délivre par un câble un signal représentatif de la rotation du volant à destination du dispositif d'orientation des roues du véhicule. Le volant étant monté sur son support par un ou plusieurs paliers à roulement et n'étant pas lié à des systèmes mécaniques de transmission de couple, la rotation du volant s'effectue avec un couple résistant extrêmement faible. On y ajoute donc souvent un système de freinage du volant destiné à générer dans celui-ci un couple résistant afin de favoriser la précision et le confort de la conduite du. véhicule. Un dispositif de ce type est décrit par exemple dans le document DE-A-In the case of a purely electric steering, more and more commonly used for handling machines such as forklifts. A steering wheel rotation detection system, whether integrated into the bearings or not, delivers a signal representative of the steering wheel rotation to the vehicle's wheel orientation device. The flywheel being mounted on its support by one or more rolling bearings and not being linked to mechanical torque transmission systems, the flywheel is rotated with an extremely low resistive torque. So we often add a steering wheel braking system to generate a resistant torque in order to promote the precision and comfort of driving. vehicle. A device of this type is described for example in the document DE-A-
195 10 717.195 10 717.
Ce dispositif présente toutefois certains inconvénients parmi lesquels nous noterons tout d'abord l'encombrement axial et le coût relativement élevés en raison de la présence de deux roulements dans le prolongement desquels est disposé un système de frein utilisant un ressort
à boudin venant presser une pièce conique de friction dans une cuvette comportant également une surface de friction conique. Le couple de friction développé par un tel dispositif est relativement réduit et l'usure importante du fait des faibles surfaces de friction. En outre, le système de freinage modifie le jeu de fonctionnement des roulements.However, this device has certain drawbacks, among which we will note first of all the relatively high axial size and cost due to the presence of two bearings in the extension of which is arranged a brake system using a spring. with a flange pressing a conical friction piece in a bowl also comprising a conical friction surface. The friction torque developed by such a device is relatively reduced and significant wear due to the small friction surfaces. In addition, the braking system changes the operating clearance of the bearings.
On connaît par le document FR-A-2 782 970 un volant de commande monté sur un roulement instrumenté et auquel est adjoint un système de freinage dont la partie tournante est supportée par la bague intérieure tournante du roulement et vient frotter contre le fond d'un boîtier. Toutefois, dans ce type de dispositif, le roulement n'est pas monté sur un axe et l'encombrement diamétral du roulement et du dispositif est important. De plus, le volant comprend une partie radiale et une partie axiale pour la fixation sur le palier à roulement. Le volant possède donc un encombrement axial important. L'invention propose de remédier aux inconvénients des dispositifs de l'art antérieur.Document FR-A-2 782 970 discloses a control wheel mounted on an instrumented bearing and to which is added a braking system the rotating part of which is supported by the rotating inner ring of the bearing and rubs against the bottom of a housing. However, in this type of device, the bearing is not mounted on an axis and the diametrical size of the bearing and of the device is significant. In addition, the flywheel includes a radial part and an axial part for fixing to the rolling bearing. The steering wheel therefore has a large axial size. The invention proposes to remedy the drawbacks of the devices of the prior art.
L'invention propose un dispositif économique et peu encombrant radialement.The invention provides an economical and space-saving device radially.
Le dispositif de palier à roulement instrumenté, selon un aspect de l'invention,est du genre pour volant de commande, comprenant une partie extérieure, une partie intérieure, l'une étant tournante et l'autre non tournante, une rangée d'éléments roulants disposés entre lesdites parties tournante et non tournante. Ledit dispositif comprend, en outre, un moyen de détection des paramètres de rotation. La partie tournante est pourvue à l'une de ses extrémités axiales de moyens de fixation permettant d'assurer la fixation et la liaison angulaire de ladite partie tournante sur un volant de manoeuvre, la partie non tournante comprenant une surface radiale pourvue de moyens de fixation sur un support.The instrumented rolling bearing device, according to one aspect of the invention, is of the type for a control wheel, comprising an external part, an internal part, one being rotating and the other non-rotating, a row of elements. rollers arranged between said rotating and non-rotating parts. The device further comprises means for detecting the rotation parameters. The rotating part is provided at one of its axial ends with fixing means making it possible to ensure the fixing and the angular connection of said rotating part on a handwheel, the non-rotating part comprising a radial surface provided with fixing means on a support.
Dans un mode de réalisation, les moyens de fixation du volant de manoeuvre sur la partie tournante sont aménagés à partir d'une surface sensiblement radiale de la partie tournante.In one embodiment, the means for fixing the handwheel to the rotating part are arranged from a substantially radial surface of the rotating part.
De préférence, les moyens de fixation de la partie non tournante sont disposés radialement à une distance de l'axe de rotation de la partie tournante supérieure ou sensiblement égale à la distance entre les moyens de fixation de la surface radiale de la partie tournante et l'axe de rotation.
Les moyens de fixation de la partie non tournante ne gênent pas l'accès dans la zone de l'axe de rotation de la partie tournante, que la partie non tournante soit la partie extérieure ou la partie intérieure du palier à roulement freiné. Les moyens de fixation de la partie non tournante permettent encore de pouvoir monter facilement le palier à roulement instrumenté sur une paroi de support, en intégrant éventuellement le palier à roulement instrumenté dans un logement de la paroi de support, de façon que le palier à roulement instrumenté se situe dans son ensemble d'un premier côté de la paroi de support sur laquelle il est fixé, alors que l'organe de commande associé au palier à roulement freiné se situe axialement du côté opposé.Preferably, the means for fixing the non-rotating part are arranged radially at a distance from the axis of rotation of the upper rotating part or substantially equal to the distance between the means for fixing the radial surface of the rotating part and l 'rotation axis. The means for fixing the non-rotating part do not hinder access to the area of the axis of rotation of the rotating part, whether the non-rotating part is the outer part or the inner part of the braked bearing. The means for fixing the non-rotating part also make it possible to easily mount the instrumented rolling bearing on a support wall, possibly integrating the instrumented rolling bearing in a housing of the support wall, so that the rolling bearing instrumented as a whole is located on a first side of the support wall on which it is fixed, while the control member associated with the braked bearing is located axially on the opposite side.
Dans un mode de réalisation, la partie tournante comprend une portion axiale pourvue d'une surface radiale, dans laquelle est pratiqué au moins un trou de fixation. Dans un mode de réalisation, la partie tournante comprend une portion tubulaire, et une portion radiale s'étendant radialement vers l'intérieur à partir d'une extrémité de la portion tubulaire, la portion radiale étant pourvue d'au moins un trou de fixation.In one embodiment, the rotating part comprises an axial portion provided with a radial surface, in which at least one fixing hole is made. In one embodiment, the rotating part comprises a tubular portion, and a radial portion extending radially inwards from one end of the tubular portion, the radial portion being provided with at least one fixing hole. .
Dans un mode de réalisation, la partie tournante comprend une portion tubulaire, et une portion radiale s'étendant radialement vers l'extérieur à partir d'une extrémité de la portion tubulaire, la portion radiale étant pourvue d'au moins un trou de fixation.In one embodiment, the rotating part comprises a tubular portion, and a radial portion extending radially outward from one end of the tubular portion, the radial portion being provided with at least one fixing hole. .
Eventuellement, la partie non tournante comprend une portion tubulaire, une portion radiale s'étendant radialement vers l'extérieur à partir d'une extrémité de la portion tubulaire, la portion radiale étant pourvue d'au moins un trou de fixation.Optionally, the non-rotating part comprises a tubular portion, a radial portion extending radially outward from one end of the tubular portion, the radial portion being provided with at least one fixing hole.
Avantageusement, la portion radiale de la partie non tournante se situe sensiblement dans le même plan radial que la surface radiale de la partie tournante. De préférence, la partie non tournante comprend un trou débouchant central permettant le passage d'un axe.Advantageously, the radial portion of the non-rotating part is located substantially in the same radial plane as the radial surface of the rotating part. Preferably, the non-rotating part comprises a central through hole allowing the passage of an axis.
Avantageusement, les parties tournante et non tournante comprennent chacune un chemin de roulement, entre lesquelles sont disposés les éléments roulants. Dans un mode de réalisation, les parties tournante et non
tournante comprennent chacune une bague, entre lesquelles sont disposés les éléments roulants.Advantageously, the rotating and non-rotating parts each comprise a raceway, between which the rolling elements are arranged. In one embodiment, the rotating parts and not rotating each comprise a ring, between which are arranged the rolling elements.
Dans un mode de réalisation, le dispositif comprend des moyens de freinage comprenant une pluralité de disques maintenus en contact de friction par au moins un élément élastique axialement.In one embodiment, the device comprises braking means comprising a plurality of discs held in friction contact by at least one resilient element axially.
Dans un mode de réalisation, le dispositif comprend des moyens de freinage comprenant un joint en contact de friction avec une surface cylindrique.In one embodiment, the device comprises braking means comprising a seal in friction contact with a cylindrical surface.
Ce dispositif de palier instrumenté s'adapte et se monte facilement en de "nombreux emplacements possibles d'un véhicule ou d'une machine, par exemple sur un tableau de bord, par l'intermédiaire du boîtier formant support. Quelques vis suffisent à la fixation du dispositif et à son entraînement en rotation par le volant de manoeuvre ou de commande. Les moyens de fixation de la partie non tournante sont judicieusement placés pour ne pas gêner l'accès dans la zone de l'axe de rotation de la partie tournante, et de façon à permettre l'intégration du palier à roulement dans un tableau de bord par exemple.This instrumented bearing device easily adapts and mounts in " many possible locations of a vehicle or machine, for example on a dashboard, via the housing forming a support. A few screws are sufficient for the fixing of the device and of its rotation drive by the handwheel or control wheel The means for fixing the non-rotating part are judiciously placed so as not to impede access in the area of the axis of rotation of the rotating part , and so as to allow the integration of the rolling bearing in a dashboard for example.
La présente invention sera mieux comprise et d'autres avantageuses apparaîtront à la lecture de la description détaillée de quelques modes de réalisation pris à titre d'exemples nullement limitatifs et illustrés par les dessins annexés, sur lesquels :The present invention will be better understood and other advantageous aspects will appear on reading the detailed description of some embodiments taken by way of non-limiting examples and illustrated by the appended drawings, in which:
- la figure 1 est une vue en coupe axiale d'un dispositif de palier;- Figure 1 is an axial sectional view of a bearing device;
- la figure 2 est une vue en coupe selon II-II de la figure 1 du dispositif de palier; - la figure 3 est une vue en coupe axiale d'un second mode de réalisation du dispositif de palier;- Figure 2 is a sectional view along II-II of Figure 1 of the bearing device; - Figure 3 is an axial sectional view of a second embodiment of the bearing device;
- la figure 4 est une vue en coupe axiale d'un troisième mode de réalisation du dispositif de palier;- Figure 4 is an axial sectional view of a third embodiment of the bearing device;
- la figure 5 est une vue en coupe axiale d'un quatrième mode de réalisation du dispositif de palier;- Figure 5 is an axial sectional view of a fourth embodiment of the bearing device;
- la figure 6 est une vue en coupe axiale d'un cinquième mode de réalisation du dispositif de palier;- Figure 6 is an axial sectional view of a fifth embodiment of the bearing device;
Comme on peut le voir sur les figures 1 et 2, le dispositif de palier à roulement comprend un élément extérieur 1 , de forme annulaire, à demi-section en L, avec une portion tubulaire 2 et une portion radiale 3
s'étendant à une extrémité de la portion tubulaire vers l'extérieur. La portion radiale 3 comprend une surface 3 a orientée du côté de la portion tubulaire 2 et pourvue d'une pluralité de trous de fixation 4 traversant la paroi 3 aptes à recevoir des vis en vue d'une fixation sur un bâti fixe. La portion tubulaire 2 est pourvue de deux encoches formant des lumières 5 s'étendant à partir de l'extrémité libre de ladite portion tubulaire 2, situées à l'opposé de la portion radiale 3. Les lumières 5 sont de forme rectangulaire, leur longueur s'étendant parallèlement à l'axe référencé 6, qui est l'axe de rotation de la partie tournante, sur lequel est centré l'élément extérieur 1. L'élément extérieur 1 peut être réalisé en tôle emboutie ou pliée. Un capot 7, réalisé par exemple en matériau synthétique, présentant une forme de disque, vient fermer l'extrémité libre de la portion tubulaire 2 sur laquelle débouchent les lumières 5, en venant s'emmancher dans son alésage. Le dispositif de palier à roulement comprend également un élément intérieur 8, également centré sur l'axe 6, de forme annulaire à section en U, présentant une portion tubulaire 9 dont une extrémité est obturée par une portion radiale 10 s'étendant radialement vers l'intérieur à partir d'une extrémité de la portion tubulaire 9. Une pluralité de trous 11 sont prévus à travers la portion radiale 10 pour recevoir des vis, par exemple destinées à la fixation d'un volant de manoeuvre. L'élément intérieur 8 peut également être réalisé en tôle emboutie. Entre les éléments extérieur 1 et intérieur 8, est disposée une rangée d'éléments roulants 12 maintenus par une cage 13. Une bague extérieure 14 est emmanchée dans l'alésage 2a de la portion tubulaire 2 de l'élément extérieur 1 et est pourvue d'un chemin de roulement 16 pour les éléments roulants 12. Une bague intérieure 15 est emmanchée sur la surface extérieure 9a de la portion tubulaire 9 de l'élément intérieur 8 et est pourvue d'un chemin de roulement 17 pour les éléments roulants 12. La bague extérieure 14 est en outre pourvue de deux rainures annulaires symétriques 18 et 19 formées sur son alésage, de part et d'autre du chemin de roulement 16. Dans la rainure 18, est fixé un organe d'étanchéité 20 qui vient frotter contre une portée de la bague intérieure 15. Dans la rainure 19 est fixé un bloc capteur référencé 21 dans son ensemble.
Dans l'exemple illustré, le bloc capteur 21 comprend deux éléments de détection 22, 23 disposés de façon diamétralement opposée et noyés chacun dans une matière synthétique formant une partie centrale 24 du bloc capteur 21. La fixation du bloc capteur 21 sur la face frontale de la bague extérieure 14 se fait au moyen d'un support 25 de fixation interposé entre la bague 14 et le bloc capteur 21, à la fois sur les parties radiales et sur les parties circonférentielles et dont une extrémité libre est repliée dans la rainure 19.As can be seen in FIGS. 1 and 2, the rolling bearing device comprises an external element 1, of annular shape, with half-section in L, with a tubular portion 2 and a radial portion 3 extending at one end of the tubular portion towards the outside. The radial portion 3 comprises a surface 3a oriented on the side of the tubular portion 2 and provided with a plurality of fixing holes 4 passing through the wall 3 able to receive screws for attachment to a fixed frame. The tubular portion 2 is provided with two notches forming slots 5 extending from the free end of said tubular portion 2, located opposite the radial portion 3. The slots 5 are rectangular, their length extending parallel to the axis referenced 6, which is the axis of rotation of the rotating part, on which the external element 1 is centered. The external element 1 can be made of stamped or folded sheet metal. A cover 7, made for example of synthetic material, having the shape of a disc, comes to close the free end of the tubular portion 2 on which the openings 5 open, by fitting into its bore. The rolling bearing device also comprises an inner element 8, also centered on the axis 6, of annular shape with U-section, having a tubular portion 9 of which one end is closed by a radial portion 10 extending radially towards the inside from one end of the tubular portion 9. A plurality of holes 11 are provided through the radial portion 10 to receive screws, for example intended for fixing a handwheel. The inner element 8 can also be made of stamped sheet metal. Between the exterior 1 and interior 8 elements, is arranged a row of rolling elements 12 held by a cage 13. An exterior ring 14 is fitted into the bore 2a of the tubular portion 2 of the exterior element 1 and is provided with a raceway 16 for the rolling elements 12. An inner ring 15 is fitted on the outer surface 9a of the tubular portion 9 of the interior element 8 and is provided with a raceway 17 for the rolling elements 12. The outer ring 14 is further provided with two symmetrical annular grooves 18 and 19 formed on its bore, on either side of the raceway 16. In the groove 18, is fixed a sealing member 20 which rubs against a bearing surface of the inner ring 15. In the groove 19 is fixed a sensor block referenced 21 as a whole. In the example illustrated, the sensor block 21 comprises two detection elements 22, 23 arranged in diametrically opposite directions and each embedded in a synthetic material forming a central part 24 of the sensor block 21. The fixing of the sensor block 21 on the front face of the outer ring 14 is made by means of a fixing support interposed between the ring 14 and the sensor block 21, both on the radial parts and on the circumferential parts and of which a free end is folded back in the groove 19 .
Une portion annulaire cylindrique 24a vient s'insérer partiellement à l'intérieur de l'alésage de la bague non tournante 14 sensiblement au niveau de la rainure 19, de façon que les éléments de détection 22, 23 puissent être partiellement disposés entre les deux bagues 14 et 15. Une plaque de protection externe 26 est en outre fixée à l'extérieur du bloc capteur 21 par un sertissage réalisé en rabattant l'autre extrémité libre 25a du support 25 sur la périphérie de la plaque de protection externe 26.A cylindrical annular portion 24a is inserted partially inside the bore of the non-rotating ring 14 substantially at the level of the groove 19, so that the detection elements 22, 23 can be partially disposed between the two rings 14 and 15. An external protection plate 26 is also fixed to the outside of the sensor unit 21 by crimping carried out by folding the other free end 25a of the support 25 onto the periphery of the external protection plate 26.
Le bloc capteur 21 comprend en outre deux terminaux filaires 27 et 28, associés respectivement aux éléments de détection 22 et 23, et formés par une excroissance du matériau synthétique de la partie centrale 24 pour assurer la fixation de l'extrémité d'un câble 29, 30 par lequel un signal émis peut être retransmis à une centrale électronique de traitement et d'exploitation du signal, non représentée sur les figures. Les terminaux filaires 27, 28 du bloc capteur 21 font saillie chacun à travers une lumière 5 de la portion tubulaire 2 de l'élément extérieur 1 en étant en contact avec le fond desdites lumières 5.The sensor block 21 further comprises two wired terminals 27 and 28, associated respectively with the detection elements 22 and 23, and formed by a protuberance of the synthetic material from the central part 24 to ensure the fixing of the end of a cable 29 , 30 by which a transmitted signal can be retransmitted to an electronic central processing and processing of the signal, not shown in the figures. The wired terminals 27, 28 of the sensor unit 21 each protrude through a slot 5 in the tubular portion 2 of the external element 1 while being in contact with the bottom of said slots 5.
Les deux éléments de détection 22, 23 coopèrent chacun avec un anneau codeur unique 31 monté en regard du bloc capteur 21 sur la surface cylindrique externe de la bague tournante 15, de façon à être entraîné en rotation par cette dernière. Le montage de l'anneau codeur 31 se fait au moyen d'un support 32 qui vient se loger en partie entre les bagues 14 etThe two detection elements 22, 23 each cooperate with a single coding ring 31 mounted opposite the sensor block 21 on the external cylindrical surface of the rotating ring 15, so as to be driven in rotation by the latter. The assembly of the encoder ring 31 is done by means of a support 32 which is housed partly between the rings 14 and
15. Le support 31, de forme annulaire à section en T, est emmanché sur la surface cylindrique extérieure de la bague tournante 15 et vient en butée contre une surface frontale de cette dernière. Une portion de l'anneau codeur 31 se trouve ainsi entre les bagues 14 et 15 et une portion fait saillie à l'extérieur. La majeure partie de la surface cylindrique extérieure de
l'anneau codeur 31 se trouve en regard des deux éléments de détection 22, 23 avec un léger entrefer.15. The support 31, of annular shape with T-section, is fitted on the outer cylindrical surface of the rotating ring 15 and abuts against a front surface of the latter. A portion of the encoder ring 31 is thus located between the rings 14 and 15 and a portion projects outside. Most of the outer cylindrical surface of the encoder ring 31 is located opposite the two detection elements 22, 23 with a slight air gap.
Un roulement est ainsi formé par les éléments roulants 12 et des chemins de roulement pratiqués sur des surfaces axiales des bagues 14 et 15. A ce roulement peuvent venir se rajouter un ou plusieurs joints d'étanchéité, un ou plusieurs codeurs, un ou plusieurs capteurs, etc.A bearing is thus formed by the rolling elements 12 and raceways made on the axial surfaces of the rings 14 and 15. To this bearing can be added one or more seals, one or more encoders, one or more sensors , etc.
Un organe de freinage 33 est également disposé entre la surface extérieure 9a de la portion tubulaire 9 de l'élément intérieur 8 et l'alésage 2a de la portion tubulaire 2 de l'élément extérieur 1. L'organe de freinage 33 est disposé dans le prolongement axial du roulement muni de son système de détection des paramètres de rotation et est situé axialement entre l'extrémité libre de la portion tubulaire 9 de l'élément intérieur 8 et la plaque 26 protégeant le bloc capteur 21. Plus généralement, l'organe de freinage 33 est limité axialement par le capot 7, car on pourrait prévoir qu'il fasse saillie axialement au-delà de l'extrémité libre de la portion tubulaire 9 en direction dudit capot 7.A braking member 33 is also disposed between the outer surface 9a of the tubular portion 9 of the inner member 8 and the bore 2a of the tubular portion 2 of the outer member 1. The braking member 33 is disposed in the axial extension of the bearing provided with its rotation parameter detection system and is located axially between the free end of the tubular portion 9 of the inner element 8 and the plate 26 protecting the sensor unit 21. More generally, the braking member 33 is axially limited by the cover 7, since it could be provided that it projects axially beyond the free end of the tubular portion 9 in the direction of said cover 7.
L'organe de freinage 33 comprend une partie tournante 33a formée de deux éléments 34, 35, de forme semblable, et comprenant chacun une portion axiale tubulaire 34a, 35a et une portion radiale 34b, 35b en forme de disque. Les extrémités libres des portions tabulaires 34a,The braking member 33 comprises a rotating part 33a formed by two elements 34, 35, of similar shape, and each comprising a tubular axial portion 34a, 35a and a radial portion 34b, 35b in the form of a disc. The free ends of the tabular portions 34a,
35a sont montées en contact l'une avec l'autre, de façon que les éléments 34 et 35 forment une partie tournante 33a à section en U emmanchée sur la surface extérieure 9a de la portion tubulaire 9.35a are mounted in contact with each other, so that the elements 34 and 35 form a rotating part 33a with a U-shaped section fitted on the outer surface 9a of the tubular portion 9.
La partie non tournante 33b de l'organe de freinage 33 comprend deux disques métalliques 36 et 37, disposés axialement entre les portions radiales 34b et 35b de la partie tournante 33a. Entre les disques 36 et 37, est disposée une rondelle 38 axialement élastique. Un disque ou revêtement de friction 39 est interposé axialement entre le disque 36 et la portion radiale en forme de disque 34b. Ce disque ou revêtement de friction est réalisé en un matériau à coefficient de frottement élevé avec les disques fixes 41 et la portion radiale 34b. S'il s'agit d'un revêtement, il est adhérisé de préférence au disque 41 et vient frotter sur la portion radiale 34b. Il en est de même pour le revêtement de friction 40, le disque 37 et la portion radiale 35b. Les disques 36 et 37 comprennent chacun deux ergots 41, 42 en
saillie radialement vers l'extérieur, diamétralement opposés et disposés chacun dans une lumière 5 de la portion tubulaire 2 de l'élément extérieur 1.The non-rotating part 33b of the braking member 33 comprises two metal discs 36 and 37, arranged axially between the radial portions 34b and 35b of the rotating part 33a. Between the discs 36 and 37, an axially elastic washer 38 is disposed. A friction disc or coating 39 is interposed axially between the disc 36 and the disc-shaped radial portion 34b. This friction disc or coating is made of a material with a high coefficient of friction with the fixed discs 41 and the radial portion 34b. If it is a coating, it is preferably adhered to the disc 41 and rubs against the radial portion 34b. It is the same for the friction lining 40, the disc 37 and the radial portion 35b. The discs 36 and 37 each comprise two pins 41, 42 in projecting radially outwards, diametrically opposite and each arranged in a lumen 5 of the tubular portion 2 of the external element 1.
En fonctionnement, les disques 36 et 37 sont angulairement solidaires avec l'élément extérieur 1 en raison de la présence des ergotsIn operation, the discs 36 and 37 are angularly integral with the external element 1 due to the presence of the pins
41, 42 qui empêche ainsi tout déplacement angulaire par rapport aux lumières 5. Les disques 36, 37 sont donc fixes alors que les éléments latéraux 34, 35 sont tournants. Le contact de friction entre les disques fixes et les éléments tournants par l'intermédiaire des disques ou revêtements de friction 39, 40 crée donc un couple résistant.41, 42 which thus prevents any angular displacement relative to the lights 5. The discs 36, 37 are therefore fixed while the lateral elements 34, 35 are rotating. The friction contact between the fixed discs and the rotating elements via the friction discs or coatings 39, 40 therefore creates a resistant torque.
La rondelle élastique 38 maintient en permanence un effort axial tendant à écarter les disques 41 et 42 et assurant ainsi la friction des disques ou revêtements de friction 39 et 40 sur les surfaces correspondantes des portions radiales 34b et 35b de la partie tournante 33a de l'organe de freinage 33.The elastic washer 38 permanently maintains an axial force tending to separate the discs 41 and 42 and thus ensuring the friction of the discs or friction coatings 39 and 40 on the corresponding surfaces of the radial portions 34b and 35b of the rotating part 33a of the braking device 33.
Sur la figure 1 , un organe de commande sous la forme d'un volant de manoeuvre 44, comprend une partie de préhension 45 torique solidaire d'une partie de support 46 présentant une forme de coupelle avec une partie radiale 47 dont l'extrémité libre de grand diamètre supporte la partie de préhension 45 et une partie centrale 48 s'étendant radialement vers l'intérieur à partir du bord intérieur de la partie radiale 47. La partie centrale 48 possède une surface 48a en contact avec une surface 10a de la portion radiale 10 orientée du côté opposé au capot 7. Des organes de fixation 49 et 50 symbolisés par des traits pour améliorer la clarté du dessin, coopèrent avec les trous 11 de la paroi radiale 10 pour permettre la fixation du volant de manoeuvre 44 sur la partie intérieure tournante 8 et pour assurer l'entraînement en rotation de la partie tournante 8 par le volant de manoeuvre 44. Les organes de fixation 49 et 50 pourront être par exemple des vis pourvues sur leur surface extérieure d'un filetage coopérant avec un filetage pratiqué sur les alésages des trous 11 de la paroi radiale 10.In FIG. 1, a control member in the form of an operating handwheel 44, comprises a toric grip part 45 secured to a support part 46 having a cup shape with a radial part 47 whose free end of large diameter supports the gripping part 45 and a central part 48 extending radially inwards from the internal edge of the radial part 47. The central part 48 has a surface 48a in contact with a surface 10a of the portion radial 10 oriented on the side opposite to the cover 7. Fastening members 49 and 50 symbolized by lines to improve the clarity of the drawing, cooperate with the holes 11 of the radial wall 10 to allow the fixing of the handwheel 44 on the part rotating interior 8 and to ensure the rotational drive of the rotating part 8 by the handwheel 44. The fixing members 49 and 50 may for example be screws provided on their outer surface of a thread cooperating with a thread formed on the bores of the holes 11 in the radial wall 10.
Une paroi de support 51, s'étendant dans un plan radial, possède une surface 51a orientée du côté du volant de manoeuvre 44, en appui sur la surface 3a de la portion radiale 3. La paroi de support 51 possède un trou axial 52 permettant le passage axialement de la portion tubulaire 2 de
l'élément extérieur 1, tout en empêchant le passage axialement de la portion radiale 3 de l'élément extérieur 1. Ainsi, on peut amener l'élément extérieur 1, en passant axialement la portion tubulaire 2 dans le trou axial 52 de la paroi de support 51 , jusqu'à ce que la surface radiale 3a de la paroi radiale 3 vienne en butée sur la surface 5 la de la paroi de support 51. Des éléments de fixation 53, 54, coopèrent avec les trous de fixation 4 de la surface radiale 3 a, pour permettre la fixation de l'élément extérieur 1 sur la paroi de support 51.A support wall 51, extending in a radial plane, has a surface 51a oriented on the side of the handwheel 44, bearing on the surface 3a of the radial portion 3. The support wall 51 has an axial hole 52 allowing the axial passage of the tubular portion 2 of the external element 1, while preventing the axial passage of the radial portion 3 of the external element 1. Thus, the external element 1 can be brought, by passing the tubular portion 2 axially in the axial hole 52 of the wall support 51, until the radial surface 3a of the radial wall 3 abuts on the surface 5a of the support wall 51. Fastening elements 53, 54 cooperate with the fixing holes 4 of the radial surface 3 a, to allow the external element 1 to be fixed on the support wall 51.
Le dispositif de palier à roulement instrumenté se présente ainsi sous la forme d'une cartouche compacte disposée radialement entre l'élément extérieur fixe 1 et l'élément intérieur tournant 8, dans le prolongement axial et à proximité immédiate du roulement instrumenté. Les moyens de fixation de l'élément extérieur non tournant, disposés sur une surface radiale de la portion radiale 3, permettent de monter le palier à roulement instrumenté de façon qu'il se situe d'un premier côté de la paroi de support 51 alors que le volant se situe du côté opposé tout en conservant un montage simple du palier freiné sur son support. Le palier à roulement instrumenté peut ainsi être intégré dans le support pour diminuer l'encombrement du palier à roulement instrumenté et pour assurer une meilleure protection du palier à roulement instrumenté.The instrumented rolling bearing device is thus in the form of a compact cartridge arranged radially between the fixed external element 1 and the rotating internal element 8, in the axial extension and in the immediate vicinity of the instrumented bearing. The means for fixing the non-rotating external element, arranged on a radial surface of the radial portion 3, make it possible to mount the instrumented rolling bearing so that it is located on a first side of the support wall 51 then the flywheel is on the opposite side while keeping the braked bearing simple on its support. The instrumented rolling bearing can thus be integrated into the support to reduce the size of the instrumented rolling bearing and to ensure better protection of the instrumented rolling bearing.
Les différentes fonctions, notamment celles de roulement assurées par les éléments roulants 12, de détection de paramètres de rotation assurée par le bloc capteur 21 et de freinage assuré par l'organe de freinage 33, sont réalisées par des moyens disposés dans un espace annulaire limité, radialement entre la portion tubulaire 2 de l'élément extérieur 1 et la portion tubulaire 9 de l'élément intérieur 8 et axialement entre la portion radiale 34a de l'élément 34 de l'organe de freinage 33 et la surface frontale des bagues 14 et 15 opposée au bloc capteur 21. En outre, les éléments roulants 12, le moyen de détection des paramètres et le moyen de freinage son axialement adjacents deux à deux, de façon que le palier à roulement freiné possède un faible encombrement axial. Plus précisément, dans ce mode de réalisation, le moyen de freinage est adjacent au moyen de détection, le moyen de détection étant adjacent aux éléments roulants 12. Le montage des différents éléments peut s'effectuer en
emmanchant le roulement et l'organe de freinage 33 sur l'élément intérieur 8, puis en amenant l'élément extérieur 1 de la droite vers la gauche sur la figure 1 , ce qui provoque l'emmanchement de la bague extérieure 14 dans l'alésage 2a, le passage des terminaux filaires 27 et 28 dans les lumières 5 et le passage des ergots 41 à 42 également dans les mêmes lumières 5. On vient ensuite fixer le capot 7 sur l'élément extérieur 1.The various functions, in particular those of bearing provided by the rolling elements 12, of detection of parameters of rotation provided by the sensor unit 21 and of braking provided by the braking member 33, are carried out by means arranged in a limited annular space , radially between the tubular portion 2 of the outer element 1 and the tubular portion 9 of the inner element 8 and axially between the radial portion 34a of the element 34 of the braking member 33 and the front surface of the rings 14 and 15 opposite the sensor block 21. In addition, the rolling elements 12, the parameter detection means and the braking means are axially adjacent in pairs, so that the braked rolling bearing has a small axial size. More specifically, in this embodiment, the braking means is adjacent to the detection means, the detection means being adjacent to the rolling elements 12. The mounting of the different elements can be carried out in engaging the bearing and the braking member 33 on the inner member 8, then bringing the outer member 1 from the right to the left in Figure 1, which causes the fitting of the outer ring 14 in the bore 2a, the passage of the wired terminals 27 and 28 in the slots 5 and the passage of the lugs 41 to 42 also in the same slots 5. The cover 7 is then fixed on the external element 1.
On remarquera que les lumières 5, qui peuvent être en variante au nombre différent de deux, assurent à la fois le passage des câbles 28 et 29 et la solidarisation angulaire de la partie non tournante 33b de l'organe de freinage 33 et de l'élément extérieur 1. Les différents éléments sont tous de forme simple. Le roulement peut être de type standard et donc très bon marché. L'organe de freinage peut être fabriqué à partir de pièces en tôle également bon marché.It will be noted that the lights 5, which may alternatively be of a number different from two, ensure both the passage of the cables 28 and 29 and the angular connection of the non-rotating part 33b of the braking member 33 and the external element 1. The various elements are all simple in shape. The bearing can be of the standard type and therefore very inexpensive. The braking member can be made from sheet metal parts which are also inexpensive.
On pourrait bien entendu prévoir une cartouche dans laquelle le dispositif de détection des paramètres de rotation n'est pas monté sur les bagues de roulement mais à côté de celles-ci, par exemple en contact direct avec les éléments extérieur 1 et intérieur 8. On pourrait prévoir de n'utiliser qu'un seul élément de détection et un seul terminal filaire.It could of course be provided with a cartridge in which the device for detecting the rotation parameters is not mounted on the bearing rings but adjacent to them, for example in direct contact with the exterior 1 and interior 8 elements. could plan to use only one detection element and one wired terminal.
La fixation du volant de manoeuvre 44 peut être effectuée facilement sur l'élément intérieur 8 tournant. L'utilisation d'un élément 8 intermédiaire entre le palier à roulement instrumenté et le volant de manoeuvre 44 permet de simplifier le volant de manoeuvre 44 et sa fixation. Ainsi, le volant de manoeuvre possède une partie de préhension 45 et une partie radiale 47, de sorte que le volant de manoeuvre 44 possède un encombrement axial très faible, ce qui facilite son stockage et son transport, et permet de réaliser des économies de coût dans la fabrication et l'installation du palier à roulement instrumenté et du volant de manoeuvre 44. De plus, on risque moins d'abîmer le volant lors de son transport, car il ne possède pas de partie axiale saillante. Sur la figure 3, les références relatives aux éléments semblables ont été reprises. Dans ce mode de réalisation, l'élément extérieur 1 possède sur l'alésage 2a de la portion tubulaire 2 un chemin de roulement 55 obtenu par déformation de ladite portion tubulaire 2. La surface extérieure 9a de la portion tubulaire 9 comprend un chemin de roulement 56 obtenu par déformation de ladite portion tubulaire 9, radialement en
regard du chemin 55. Les éléments roulants 12 sont disposés directement entre le chemin 55 de l'élément extérieur 1 et le chemin 56 de l'élément intérieur 8. Le palier à roulement freiné est ainsi plus léger et plus compact radialement. La portion annulaire cylindrique 24a du bloc capteur 21 est ici directement emmanchée dans l'alésage 2a de la portion tubulaire 2 de l'élément extérieur 1. Le support 32 de l'anneau codeur 31 est directement emmanché sur la surface extérieure 9a de la portion tubulaire 9, axialement en butée sur l'extrémité axiale de la portion tubulaire 9. Un organe d'étanchéité 57 disposé radialement entre la portion tubulaire 2 de l'élément extérieur 1 et la portion tubulaire 9 de l'élément intérieur 8, et axialement du côté des éléments roulants 12 opposés au capot 7, possède une armature métallique annulaire 58 à section en L. L'organe d'étanchéité 58 comprend une portion axiale 59 emmanché dans l'alésage 2a de la portion tubulaire 2 de l'élément extérieur 1, et une portion radiale 60 s'étendant radialement vers l'intérieur à partir d'une extrémité de la portion axiale 59 opposée aux éléments roulants 12. Un joint d'étanchéité à lèvres 61 , surmoulé sur la zone de moindre diamètre de la portion radiale 60 de l'armature métallique 58, possède trois lèvres 62 venant en contact de frottement dynamique sur la surface extérieure 9a de la portion tubulaire 9 de l'élément intérieur 8.The fixing of the handwheel 44 can be carried out easily on the inner rotating element 8. The use of an element 8 intermediate between the instrumented rolling bearing and the handwheel 44 makes it possible to simplify the handwheel 44 and its fixing. Thus, the handwheel has a gripping part 45 and a radial part 47, so that the handwheel 44 has a very small axial size, which facilitates its storage and transport, and allows cost savings. in the manufacture and installation of the instrumented rolling bearing and the handwheel 44. In addition, there is less risk of damaging the flywheel during its transport, since it does not have a projecting axial part. In FIG. 3, the references relating to similar elements have been used. In this embodiment, the outer element 1 has on the bore 2a of the tubular portion 2 a raceway 55 obtained by deformation of said tubular portion 2. The outer surface 9a of the tubular portion 9 comprises a raceway 56 obtained by deformation of said tubular portion 9, radially in track 55. The rolling elements 12 are disposed directly between the path 55 of the outer element 1 and the path 56 of the inner element 8. The braked bearing is thus lighter and more compact radially. The cylindrical annular portion 24a of the sensor block 21 is here directly fitted into the bore 2a of the tubular portion 2 of the external element 1. The support 32 of the encoder ring 31 is directly fitted onto the external surface 9a of the portion tubular 9, axially in abutment on the axial end of the tubular portion 9. A sealing member 57 disposed radially between the tubular portion 2 of the outer element 1 and the tubular portion 9 of the inner element 8, and axially on the side of the rolling elements 12 opposite the cover 7, has an annular metal frame 58 with an L-shaped section. The sealing member 58 comprises an axial portion 59 fitted into the bore 2a of the tubular portion 2 of the external element 1, and a radial portion 60 extending radially inwards from one end of the axial portion 59 opposite the rolling elements 12. A lip seal 61, overmolded on the smaller diameter area of the radial portion 60 of the metal frame 58 has three lips 62 contacting dynamic friction on the outer surface 9a of the tubular portion 9 of the inner member 8.
La structure particulière du palier à roulement freiné lui confère un encombrement axial réduit. Les trous 4 de la surface radiale 3a de l'élément extérieur 1, permettent la fixation de l'élément extérieur 1 sur une paroi de support 51. Les trous 11 de la paroi radiale 10 de l'élément intérieur 8, qui est ici l'élément tournant, permettent la fixation d'un volant de manoeuvre 44, et l'entraînement en rotation mutuel entre le voalnt de manoeuvre 44 et la partie tournante, ici l'élément intérieur 8.The special structure of the braked rolling bearing gives it a reduced axial size. The holes 4 of the radial surface 3a of the external element 1 allow the fixing of the external element 1 on a support wall 51. The holes 11 of the radial wall 10 of the internal element 8, which is here l 'rotating element, allow the fixing of an operating wheel 44, and the mutual rotation drive between the operating voalnt 44 and the rotating part, here the internal element 8.
L'utilisation d'un organe d'étanchéité 57 possédant un joint à lèvres 61 en contact de frottement dynamique sur la paroi extérieure 9a de la portion radiale 9 de l'élément intérieur 8, et solidaire de l'élément extérieur 1, permet à la fois d'assurer l'étanchéité du roulement tout en générant une force de friction qui s'oppose à la rotation de l'élément intérieur 8 dans l'élément extérieur 1. Le moyen de freinage, qui est l'organe d'étanchéité 57, fixé directement sur l'élément extérieur 2, est
axialement adjacent aux éléments roulants 12. Différents agencements des moyens de freinage, des moyens de détection et de la rangée d'éléments roulants 12 peuvent être envisagés, tout en laissant ces éléments axialement adjacents deux à deux, afin d'obtenir une compacité axiale améliorée.The use of a sealing member 57 having a lip seal 61 in dynamic friction contact on the outer wall 9a of the radial portion 9 of the inner member 8, and integral with the outer member 1, allows both to seal the bearing while generating a friction force which opposes the rotation of the inner element 8 in the outer element 1. The braking means, which is the sealing member 57, fixed directly to the external element 2, is axially adjacent to the rolling elements 12. Different arrangements of the braking means, detection means and of the row of rolling elements 12 can be envisaged, while leaving these axially adjacent elements two by two, in order to obtain an improved axial compactness .
Ce mode de réalisation particulier permet d'obtenir le palier à roulement freiné à faible coût, à partir d'éléments fabriqués de façon économique par découpe, emboutissage, roulage et traitement thermique.This particular embodiment makes it possible to obtain the braked rolling bearing at low cost, from elements produced economically by cutting, stamping, rolling and heat treatment.
Sur la figure 4, l'élément extérieur 1 en forme de coupelle annulaire comprend une portion tubulaire 2 possédant un alésage 2a, et une surface radiale annulaire 2b située axialement du côté du volant de manoeuvre 44, et en contact avec une surface 5 lb de la paroi de support 51 opposée à la surface 51 a de la paroi de support 51. La surface annulaire 2b est pourvue de 2 trous axiaux filetés 65 radialement distants. Une portion radiale 63 s'étend radialement vers l'intérieur à partir de l'extrémité de la paroi tubulaire 2 opposée à la surface annulaire 2b, et ferme axialement l'alésage 2a de la paroi tubulaire 2 tout en comprenant deux trous axiaux 64, radialement distants, situés axialement en regard des éléments de détection 22, 23. Le bloc capteur 21 comprend un bourrelet annulaire 66 faisant saillie dans la rainure annulaire 19 de la bague 14, de façon à fixer le bloc capteur 21 sur la bague 14. Les terminaux filaires 27, 28 du bloc capteur 21 font saillie axialement, à partir des éléments de détection 22, 23, à travers les trous axiaux 64 de la paroi radiale 63. L'élément intérieur 8 est ici constitué d'une pièce pleine cylindrique 67, comprenant une surface extérieure cylindrique 67a, et pourvue à son extrémité axiale opposée à la paroi radiale 63 d'une surface radiale 68. Deux trous axiaux filetés 69, 70 formés dans la surface radiale 68 permettent la fixation du volant de manoeuvre 44 sur l'élément intérieur 8, la portion centrale 48 du volant de manoeuvre 44 étant en contact avec la surface radiale 68 de la portion axiale cylindrique de l'élément intérieur 8. La bague 15 est encore emmanchée sur la surface extérieure 67a de la portion axiale cylindrique 67.In FIG. 4, the external element 1 in the form of an annular cup comprises a tubular portion 2 having a bore 2a, and an annular radial surface 2b situated axially on the side of the handwheel 44, and in contact with a surface 5 lb of the support wall 51 opposite the surface 51a of the support wall 51. The annular surface 2b is provided with 2 axial threaded holes 65 radially distant. A radial portion 63 extends radially inwards from the end of the tubular wall 2 opposite the annular surface 2b, and axially closes the bore 2a of the tubular wall 2 while comprising two axial holes 64, radially distant, located axially opposite the detection elements 22, 23. The sensor block 21 comprises an annular bead 66 projecting into the annular groove 19 of the ring 14, so as to fix the sensor block 21 on the ring 14. The wired terminals 27, 28 of the sensor unit 21 protrude axially, from the detection elements 22, 23, through the axial holes 64 of the radial wall 63. The internal element 8 here consists of a solid cylindrical part 67 , comprising a cylindrical outer surface 67a, and provided at its axial end opposite the radial wall 63 with a radial surface 68. Two axial threaded holes 69, 70 formed in the radial surface 68 allow the fixing n of the operating wheel 44 on the internal element 8, the central portion 48 of the operating wheel 44 being in contact with the radial surface 68 of the cylindrical axial portion of the internal element 8. The ring 15 is still fitted on the outer surface 67a of the cylindrical axial portion 67.
Un organe d'étanchéité et de freinage possède un premier élément 71 annulaire à section en L, comprenant une portion axiale 72
emmanchée sur la surface extérieure 67a de la portion axiale cylindrique 67, et une portion radiale 73 s'étend radialement vers l'extérieur à partir de l'extrémité de la portion axiale opposée aux bagues 14 et 15. Un second élément annulaire 75 semblable au premier élément annulaire 71 comprend une portion axiale emmanchée dans l'alésage 2a de la portion tubulaire 2, une portion radiale 76 s'étendant radialement vers l'intérieur à partir d'une extrémité de la portion axiale 74, du côté de la bague 14. La portion radiale 73 du premier élément annulaire 71 vient à proximité de la portion axiale 74 du second élément annulaire 75. Une portion de support 77 s'étend à partir de la zone de moindre diamètre de la portion radiale 76, radialement vers l'intérieur, obliquement du côté opposé à la bague 14. Un joint d'étanchéité 78 surmoulé sur la zone de moindre diamètre de la portion de support 77, comprend une lèvre 79, possédant une demi-section en V, en contact avec une surface extérieure 72a de la portion axiale 72 du premier élément 71, et également en contact avec une surface radiale 73a de la portion radiale 73 du premier élément 71, orientée du côté de la bague 14. La lèvre 79 est maintenue en contact avec la portion axiale 72 au moyen d'un anneau- ressort 80 introduit dans l'ouverture de la section en V de la lèvre 79, de façon que ledit contact entre la lèvre 79 et la surface extérieure de la portion axiale 72 crée un couple de frottement venant s'opposer à la rotation du volant de manoeuvre 44. Le joint réalise une fonction d'étanchéité et une fonction de freinage. De plus, une étanchéité par passage étroit est réalisée entre la paroi radiale 73 du premier élément 71 et la paroi axiale 74 du second élément 75, la paroi radiale 73 venant radialement à proximité de la paroi axiale 74.A sealing and braking member has a first annular element 71 with an L-shaped section, comprising an axial portion 72 fitted on the outer surface 67a of the cylindrical axial portion 67, and a radial portion 73 extends radially outward from the end of the axial portion opposite the rings 14 and 15. A second annular element 75 similar to the first annular element 71 comprises an axial portion fitted into the bore 2a of the tubular portion 2, a radial portion 76 extending radially inwards from one end of the axial portion 74, on the side of the ring 14 The radial portion 73 of the first annular element 71 comes close to the axial portion 74 of the second annular element 75. A support portion 77 extends from the zone of smaller diameter of the radial portion 76, radially towards the inside, obliquely on the side opposite to the ring 14. A seal 78 overmolded on the zone of smaller diameter of the support portion 77, comprises a lip 79, having a V-shaped half-section, in contact with an outer surface 72a of the axial portion 72 of the first element 71, and also in contact with a radial surface 73a of the radial portion 73 of the first element 71, oriented on the side of the ring 14. The lip 79 is held in contact with the axial portion 72 by means of a spring ring 80 introduced into the opening of the V-shaped section of the lip 79, so that said contact between the lip 79 and the external surface of the axial portion 72 creates a friction torque opposing the rotation of the handwheel 44. The seal performs a sealing function and a braking function. In addition, a tight passage seal is produced between the radial wall 73 of the first element 71 and the axial wall 74 of the second element 75, the radial wall 73 coming radially near the axial wall 74.
Le palier à roulement freiné est de faible encombrement axial. La surface annulaire 2b s'étendant dans un plan radial, et pourvue de trous filetés 65 aptes à coopérer avec la paroi de support 51, permet de disposer le palier à roulement freiné axialement d'un premier côté de la paroi de support 51, tout en amenant, et en fixant le volant de manoeuvre 44 axialement du côté de la paroi 51 opposé au palier à roulement freiné.The braked rolling bearing has a small axial size. The annular surface 2b extending in a radial plane, and provided with threaded holes 65 able to cooperate with the support wall 51, makes it possible to have the rolling bearing axially braked on a first side of the support wall 51, while by bringing, and fixing the handwheel 44 axially on the side of the wall 51 opposite the braked rolling bearing.
Les moyens de fixation de l'élément extérieur non tournant, qui sont les trous 65, se situant à une distance de l'axe 6 de rotation de l'élément intérieur 8 supérieure à la distance des éléments roulants 12 à
l'axe de rotation, ne gênent pas l'accès à l'axe de rotation de la partie tournante pour la fixation du volant.The means for fixing the non-rotating external element, which are the holes 65, being located at a distance from the axis 6 of rotation of the internal element 8 greater than the distance from the rolling elements 12 to the axis of rotation, do not hinder access to the axis of rotation of the rotating part for fixing the steering wheel.
La figure 5 illustre un mode de réalisation dans lequel la partie intérieure est la partie non tournante, la partie extérieure étant la partie tournante. L'élément extérieur 1 possède une portion tubulaire 2 et une portion radiale 3 pourvue d'une pluralité de trous 4. Une portion radiale 85 s'étend radialement vers l'intérieur à partir de l'extrémité de la portion axiale 2 opposée à la portion radiale 3, en laissant libre un trou central 86. Le volant de manoeuvre 44 comprend un organe de préhension 45 torique, et une partie radiale 87 dont la zone de plus grand diamètre supporte l'organe de préhension 45, et s'étendant dans un plan radial, tout en laissant un trou 88 coaxial à l'élément extérieur, la zone de moindre diamètre de la portion radiale 87 se situant axialement en regard des trous 4 de la portion radiale 3 de l'élément extérieur 1. Des organes de fixation et d'entraînement 89 et 90, par exemple une vis ou un système vis-écrou symbolisés par un axe pour la clarté du dessin, permettent la fixation du volant de manoeuvre 44 sur la paroi radiale 3 de l'élément extérieur 1. L'élément intérieur 8 possède une portion tubulaire 91 dont une extrémité axiale se situe dans le plan radial de la paroi radiale 3 de l'élément extérieur 1, la portion tubulaire 91 s'étendant axialement du côté de la portion radiale 85 de l'élément extérieur 1 , au-delà de la portion radiale 85 de l'élément extérieur 1. La portion axiale 91 comprend sur sa surface extérieure une portée 92, du côté de la portion radiale 3 de l'élément extérieur 1, s'étendant axialement jusqu'à proximité de la portion radiale 85 de l'élément extérieur 1, et formant un épaulement radial 93. La bague 15 est emmanchée sur la portée 92 de la portion axiale 91, et vient axialement en butée sur l'épaulement radial 93. Du côté axialement opposé à la portée 92, l'élément intérieur 8 comprend une portion radiale d'appui 94, s'étendant radialement vers l'extérieur à partir de l'extrémité axiale de la portion axiale 91 opposée à la portée 92. La portion axiale d'appui 94 comprend des orifices 95 sensiblement en regard des trous 4. La plaque radiale d'appui 94 est en appui sur une surface 51a d'une paroi radiale de support 51. Des organes de fixation 96 par exemple une vis ou un système vis-écrou permettent la fixation de l'élément intérieur 8 sur la paroi de support 51, en coopérant
avec les orifices 95 de la paroi radiale d'appui 94.FIG. 5 illustrates an embodiment in which the internal part is the non-rotating part, the external part being the rotating part. The external element 1 has a tubular portion 2 and a radial portion 3 provided with a plurality of holes 4. A radial portion 85 extends radially inward from the end of the axial portion 2 opposite the radial portion 3, leaving a central hole 86 free. The operating wheel 44 comprises a toric gripping member 45, and a radial portion 87 whose zone of larger diameter supports the gripping member 45, and extending in a radial plane, while leaving a hole 88 coaxial with the external element, the zone of smaller diameter of the radial portion 87 lying axially opposite the holes 4 of the radial portion 3 of the external element 1. fixing and driving 89 and 90, for example a screw or a screw-nut system symbolized by an axis for clarity of the drawing, allow the fixing of the handwheel 44 on the radial wall 3 of the external element 1. L interior element 8 has a tubular portion 91, one axial end of which lies in the radial plane of the radial wall 3 of the external element 1, the tubular portion 91 extending axially on the side of the radial portion 85 of the external element 1, at beyond the radial portion 85 of the outer element 1. The axial portion 91 comprises on its outer surface a bearing 92, on the side of the radial portion 3 of the outer element 1, extending axially up to near the radial portion 85 of the external element 1, and forming a radial shoulder 93. The ring 15 is fitted on the bearing 92 of the axial portion 91, and comes axially into abutment on the radial shoulder 93. On the side axially opposite to the bearing 92, the inner element 8 comprises a radial bearing portion 94, extending radially outward from the axial end of the axial portion 91 opposite the bearing 92. The axial bearing portion 94 includes gold ifices 95 substantially opposite the holes 4. The radial support plate 94 is supported on a surface 51a of a radial support wall 51. Fastening members 96 for example a screw or a screw-nut system allow the fixing of the inner element 8 on the support wall 51, cooperating with the orifices 95 of the radial bearing wall 94.
La bague 14 est emmanchée dans l'alésage 2a de la portion axiale 2 de l'élément extérieur 1. La bague 14 est ici associée à l'élément extérieur 1 qui est l'élément tournant. L'anneau codeur 31 est solidaire de la bague 14, et comprend un support en tôle formé par une portion radialeThe ring 14 is fitted into the bore 2a of the axial portion 2 of the external element 1. The ring 14 is here associated with the external element 1 which is the rotating element. The encoder ring 31 is integral with the ring 14, and comprises a sheet metal support formed by a radial portion
97, une portion axiale s'étendant à partir de la zone de plus grand diamètre de la portion radiale 97, axialement vers les éléments roulants 12, une portion radiale 99 s'étendant radialement dans un plan situé radialement en regard de la rainure 19, radialement vers l'extérieur à partir de l'extrémité de la portion axiale 98 opposée à la portion radiale 97. La portion radiale 99 possède une extrémité libre 99a recourbée et venant se loger dans la rainure annulaire 19 de la bague 14, pour fixer l'anneau codeur 31 sur la bague 14. La partie active 100 est solidarisée avec la paroi intérieure de la portion axiale 98. Le bloc capteur 21 comprend une portion axiale 101 possédant une surface radiale d'extrémité 101a venant axialement en butée sur une surface frontale de la bague 15. Un portion radiale 102 s'étend radialement vers l'extérieur, à partir de l'extrémité de la portion axiale 101 adjacente à la bague 15. Une portion axiale 102a s'étendant à partir de la zone de plus grand diamètre de la portion radiale 102, est emmanchée sur la surface extérieure de la bague 15. Le bloc capteur 21 comprend en outre deux terminaux filaires 104 et 105, associés respectivement aux éléments de détection 22 et 23, et faisant saillie axialement de la portion axiale 101 du bloc capteur 21, et passant par des trous 106 pratiqués dans la portion radiale d'appui 94 de l'élément intérieur 8.. Le trou 88 du volant de manoeuvre 44 et l'alésage 91a de la portion tubulaire 91 peuvent être éventuellement utilisés pour le logement et la fixation d'un indicateur de fonctionnement ou de contrôle, tel qu'in indicateur de vitesse, ou un témoin d'alerte. Le volant de manoeuvre posssède une partie de préhension et une partie radiale 87, de façon que le volant 44 est plat, ce qui facilite son stockage et son transport.97, an axial portion extending from the zone of greatest diameter of the radial portion 97, axially towards the rolling elements 12, a radial portion 99 extending radially in a plane situated radially opposite the groove 19, radially outward from the end of the axial portion 98 opposite the radial portion 97. The radial portion 99 has a free end 99a which is curved and which is received in the annular groove 19 of the ring 14, to fix the encoder ring 31 on the ring 14. The active part 100 is secured to the inner wall of the axial portion 98. The sensor block 21 comprises an axial portion 101 having a radial end surface 101a coming axially into abutment on a front surface of the ring 15. A radial portion 102 extends radially outward, from the end of the axial portion 101 adjacent to the ring 15. An axial portion 102a extending from the area of larger diameter of the radial portion 102 is fitted onto the outer surface of the ring 15. The sensor block 21 further comprises two wire terminals 104 and 105, associated respectively with the detection elements 22 and 23, and projecting axially of the axial portion 101 of the sensor block 21, and passing through holes 106 made in the radial bearing portion 94 of the inner element 8 .. The hole 88 of the handwheel 44 and the bore 91a of the portion tubular 91 can optionally be used for housing and fixing an operating or control indicator, such as a speed indicator, or a warning light. The handwheel has a grip part and a radial part 87, so that the handwheel 44 is flat, which facilitates its storage and transport.
La figure 6 présente un mode de réalisation dans lequel l'élément intérieur 8 tournant se présente comme une pièce de révolution pleine, possédant du côté opposé au volant de manoeuvre 44 une surface
extérieure 109a sur laquelle est emmanchée la bague 15. L'élément intérieur 8 comprend une courette annulaire 110 de section rectangulaire, formant un épaulement 111 orienté du côté de la bague 15, et sur laquelle la bague 15 vient en appui axialement. De côté opposé à l'épaulement 111, la collerette annulaire 110 comprend une surface radiale 112 se situant dans le plan de la surface radiale d'extrémité de la portion radiale 3 de l'élément extérieur 1. La collerette annulaire 110 comprend encore une surface extérieure cylindrique 113, en regard de l'alésage 2a de la portion axiale 2 de l'élément extérieur 1. La collerette annulaire 110 s'étend radialement au-delà de la bague extérieure 15. Du côté de la collerette annulaire 110 opposé à la bague 15, l'élément intérieur 8 comprend une portion de fixation 109a tronconique faisant saillie axialement de la collerette annulairel lO et pourvue à son extrémité d'une surface radiale 109b. Deux trous filetés 114, 115 formé axialement dans la surface radiale 109b de la portion de fixation 109a sont aptes à coopérer avec des organes de fixation 116, 117 pour fixer la portion radiale 48 du volant de manoeuvre 44.FIG. 6 shows an embodiment in which the inner rotating element 8 is presented as a solid part of revolution, having on the side opposite to the handwheel 44 a surface outer 109a on which is fitted the ring 15. The inner element 8 comprises an annular ring 110 of rectangular section, forming a shoulder 111 oriented on the side of the ring 15, and on which the ring 15 comes to bear axially. On the side opposite to the shoulder 111, the annular flange 110 comprises a radial surface 112 lying in the plane of the radial end surface of the radial portion 3 of the external element 1. The annular flange 110 also comprises a surface cylindrical outer 113, opposite the bore 2a of the axial portion 2 of the outer element 1. The annular flange 110 extends radially beyond the outer ring 15. On the side of the annular flange 110 opposite the ring 15, the inner element 8 comprises a frustoconical fixing portion 109a projecting axially from the annular flange lO and provided at its end with a radial surface 109b. Two threaded holes 114, 115 formed axially in the radial surface 109b of the fixing portion 109a are able to cooperate with fixing members 116, 117 to fix the radial portion 48 of the handwheel 44.
Un joint 118, disposé entre la portion axiale 2 de l'élément extérieur 1 et la collerette annulaire 110 de l'élément intérieur 8, comprend une portion axiale 119 venant en butée sur une paroi frontale de la bague 14. La portion axiale 119 s'étend axialement jusqu'au plan de la surface d'extrémité de la portion radiale 3 de l'élément extérieur 1. Le joint 118 comprend une portion radiale 120 s'étendant radialement vers l'intérieur à partir de l'extrémité de la portion axiale 119 opposée à la bague 14, en direction de la collerette annulaire 110, en étant prolongée radialement par une lèvre 121 venant en contact de friction avec la surface extérieure cylindrique 113 de la collerette annulaire 110.A seal 118, disposed between the axial portion 2 of the outer element 1 and the annular flange 110 of the inner element 8, comprises an axial portion 119 abutting on a front wall of the ring 14. The axial portion 119 s extends axially to the plane of the end surface of the radial portion 3 of the external element 1. The seal 118 comprises a radial portion 120 extending radially inward from the end of the portion axial 119 opposite the ring 14, in the direction of the annular flange 110, being extended radially by a lip 121 coming into friction contact with the cylindrical outer surface 113 of the annular flange 110.
Le joint 118 possède une seconde portion axiale 122 s'étendant axialement vers la bague 14 à partir de la zone de moindre diamètre de la portion radiale 120, et possédant à son extrémité axialement opposée à la lèvre 121 une seconde lèvre 123 en contact de friction avec la surface extérieure cylindrique 113 de la collerette annulaire 110. La lèvre 123 est maintenue en contact avec la surface extérieure cylindrique 113 de la collerette annulaire 110 au moyen d'un anneau ressort 124 situé
sensiblement dans le même plan radial que la lèvre 123, dans une rainure annulaire 125 à section en V pratiquée dans la surface extérieure de la portion axiale 122. Le joint 118 est emmanché dans l'alésage 2a de la portion axiale de l'élément extérieur 1, de façon qu'il est solidaire en rotation de l'élément extérieur 1. Le joint 118 possédant deux lèvres 121,The seal 118 has a second axial portion 122 extending axially towards the ring 14 from the zone of smallest diameter of the radial portion 120, and having at its end axially opposite the lip 121 a second lip 123 in friction contact with the cylindrical outer surface 113 of the annular flange 110. The lip 123 is kept in contact with the cylindrical outer surface 113 of the annular flange 110 by means of a spring ring 124 located substantially in the same radial plane as the lip 123, in an annular groove 125 with a V-section formed in the outer surface of the axial portion 122. The seal 118 is fitted into the bore 2a of the axial portion of the outer element 1, so that it is integral in rotation with the external element 1. The seal 118 having two lips 121,
123 en contact de friction avec la surface extérieure cylindrique 113 de la collerette annulaire 110, permet d'obtenir une étanchéité du palier à roulement par rapport à un environnement extérieur, tout en créant une force de frottement qui s'oppose à la rotation de l'élément intérieur 8 provoquée par l'opérateur.123 in friction contact with the cylindrical outer surface 113 of the annular flange 110, makes it possible to obtain a seal of the rolling bearing with respect to an external environment, while creating a friction force which opposes the rotation of the internal element 8 caused by the operator.
Le bloc capteur 21 comprend une portion annulaire 126 en appui axialement sur rextrémité de la portion axiale de l'élément extérieur 1 opposée à la paroi radiale 3, et sur une paroi frontale adjacente de la bague 14. Un bourrelet annulaire 127 fait saillie dans la nervure annulaire 19 de la bague 14, et assure la fixation du bloc capteur 21 sur la bague 14. Le bloc capteur 21 comprend une paroi radiale 128 formant capot s'étendant radialement vers l'intérieur à partir de l'extrémité de la portion annulaire 126, de façon à fermer axialement le bloc capteur 21.The sensor unit 21 includes an annular portion 126 bearing axially on the end of the axial portion of the external element 1 opposite the radial wall 3, and on an adjacent front wall of the ring 14. An annular bead 127 projects into the annular rib 19 of the ring 14, and ensures the fixing of the sensor block 21 on the ring 14. The sensor block 21 comprises a radial wall 128 forming a cover extending radially inwards from the end of the annular portion 126, so as to close the sensor unit 21 axially.
On peut obtenir le palier à roulement freiné à partir d'un nombre de pièces réduit, et diminuer son coût de fabrication. Les moyens de fixation de l'élément extérieur non tournant 1 , disposés sur la paroi radiale 3, sont situés à une distance de l'axe de rotation de l'élément intérieur tournant supérieure à la distance des éléments roulants audit axe de rotation. L'élément extérieur ne gêne l'accès à l'axe de rotation pour la fixation du volant.You can get the braked rolling bearing from a reduced number of parts, and reduce its manufacturing cost. The means for fixing the non-rotating external element 1, arranged on the radial wall 3, are located at a distance from the axis of rotation of the rotating internal element greater than the distance from the rolling elements to said axis of rotation. The external element does not hinder access to the axis of rotation for fixing the steering wheel.
De façon générale, le palier à roulement est d'encombrement axial réduit, et est obtenu à partir d'un nombre limité de pièces. Le palier à roulement freiné peut donc être obtenu à faible coût.Generally, the rolling bearing is of reduced axial size, and is obtained from a limited number of parts. The braked rolling bearing can therefore be obtained at low cost.
L'utilisation d'une paroi radiale dirigée vers l'extérieur pour la fixation de la partie non tournante du dispositif sur un support permet d'obtenir une bonne assise dudit dispositif sur ledit support tout en ayant, lorsque la collrette est située du côté du volant, la possibilité d'intégrer le dispositif de palier instrumenté dans le support.The use of an outwardly directed radial wall for fixing the non-rotating part of the device to a support makes it possible to obtain a good seating of said device on said support while having, when the collar is located on the side of the steering wheel, the possibility of integrating the instrumented bearing device into the support.
De façon générale, le palier à roulement freiné, possédant des moyens de fixation disposés sur la partie tournante, et des moyens de
fixation disposés sur la partie non tournante, peut être facilement intégré dans un sous-ensemble mécanique comprenant un système à transmission d'ordre électrique à partir d'un volant de commande. Il suffit de fixer au moyen de quelques vis le dispositif de palier instrumenté sur un bâti support, ledit dispositif étant alors prêt à recevoir un volant de commande dont le choix de la forme et des dimensions extérieures appartient à l'utilisateur.
In general, the braked rolling bearing, having fixing means arranged on the rotating part, and means for fixing arranged on the non-rotating part, can be easily integrated into a mechanical sub-assembly comprising an electrical transmission system from a control wheel. It is sufficient to fix by means of a few screws the bearing device instrumented on a support frame, said device then being ready to receive a control wheel whose choice of shape and external dimensions belongs to the user.
Claims
1. Dispositif de palier à roulement instrumenté, du genre pour volant de commande, comprenant une partie extérieure (1), une partie intérieure (8) , l'une étant tournante et l'autre non tournante, une rangée d'éléments roulants (12) disposés entre lesdites parties tournante et non tournante, ledit dispositif comprenant, en outre, un moyen de détection des paramètres de rotation, caractérisé par le fait que la partie tournante est pourvue à l'une de ses extrémités axiales de moyens permettant d'assurer la fixation et la liaison angulaire de ladite partie tournante sur un volant de manoeuvre, la partie non tournante comprenant une surface radiale (3a) pourvue de moyens de fixation sur un support.1. Instrumented rolling bearing device, of the kind for a control wheel, comprising an external part (1), an internal part (8), one being rotating and the other non-rotating, a row of rolling elements ( 12) disposed between said rotating and non-rotating parts, said device further comprising a means for detecting rotation parameters, characterized in that the rotary part is provided at one of its axial ends with means making it possible to securing and angular connection of said rotating part on a handwheel, the non-rotating part comprising a radial surface (3a) provided with fixing means on a support.
2. Dispositif selon la revendication 1, caractérisé par le fait que les moyens de fixation du volant de manoeuvre (44) sur la partie tournante sont aménagés à partir d'une surface sensiblement radiale (10a, 68, 109b) de la partie tournante. 2. Device according to claim 1, characterized in that the means for fixing the handwheel (44) on the rotating part are arranged from a substantially radial surface (10a, 68, 109b) of the rotating part.
3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé par le fait les moyens de fixation de la partie non tournante sont disposés radialement à une distance de l'axe de rotation (6) de la partie tournante supérieure ou sensiblement égale à la distance entre les moyens de fixation de la surface radiale de la partie tournante et l'axe (6). 3. Device according to any one of claims 1 or 2, characterized in that the means for fixing the non-rotating part are arranged radially at a distance from the axis of rotation (6) of the upper rotating part or substantially equal at the distance between the means for fixing the radial surface of the rotating part and the axis (6).
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la partie tournante comprend une portion axiale (67) pourvue d'une surface radiale (68) dans laquelle est pratiqué au moins un trou de fixation (69).4. Device according to any one of claims 1 to 3, characterized in that the rotating part comprises an axial portion (67) provided with a radial surface (68) in which is formed at least one fixing hole (69 ).
5. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la partie tournante comprend une portion tubulaire (9), et une portion radiale (10) s'étendant radialement vers l'intérieur à partir d'une extrémité de la portion tubulaire (9), la portion radiale (10) étant pourvue d'au moins un trou de fixation (11).5. Device according to any one of claims 1 to 3, characterized in that the rotating part comprises a tubular portion (9), and a radial portion (10) extending radially inward from a end of the tubular portion (9), the radial portion (10) being provided with at least one fixing hole (11).
6. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la partie tournante comprend une portion tubulaire(2), et une portion radiale (3) s'étendant radialement vers l'extérieur à partir d'une extrémité de la portion tubulaire(2), la portion radiale(3) étant pourvue d'au moins un trou de fixation (4). 6. Device according to any one of claims 1 to 3, characterized in that the rotating part comprises a tubular portion (2), and a radial portion (3) extending radially outward from a end of the tubular portion (2), the radial portion (3) being provided with at least one fixing hole (4).
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que la partie non tournante comprend une portion tubulaire (2), et une portion radiale (3) s'étendant radialement vers l'extérieur à partir d'une extrémité de la portion tubulaire (2), la portion radiale (3) étant pourvue d'au moins un trou de fixation (4).7. Device according to any one of the preceding claims, characterized in that the non-rotating part comprises a tubular portion (2), and a radial portion (3) extending radially outward from an end of the tubular portion (2), the radial portion (3) being provided with at least one fixing hole (4).
8. Dispositif selon l'une quelconque des revendications 4 à 7, caractérisé par le fait que la portion radiale de la partie non tournante se situe sensiblement dans le même plan radial que la surface radiale de la partie tournante. 8. Device according to any one of claims 4 to 7, characterized in that the radial portion of the non-rotating part is located substantially in the same radial plane as the radial surface of the rotating part.
9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que la partie non tournante comprend un trou débouchant central (91a) permettant le passage d'un axe.9. Device according to any one of the preceding claims, characterized in that the non-rotating part comprises a central through hole (91a) allowing the passage of an axis.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que les parties tournante et non tournante comprennent chacune un chemin de roulement (55, 56), entre lesquelles sont disposés les éléments roulants.10. Device according to any one of the preceding claims, characterized in that the rotating and non-rotating parts each comprise a raceway (55, 56), between which the rolling elements are arranged.
11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comprend deux bagues (14, 15), l'une solidaire de la partie tournante, l'autre solidaire de la partie non tournante, entre lesquelles sont disposés les éléments roulants (12).11. Device according to any one of the preceding claims, characterized in that it comprises two rings (14, 15), one secured to the rotating part, the other secured to the non-rotating part, between which are arranged the rolling elements (12).
12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comprend des moyens de freinage (33) comprenant une pluralité de disques maintenus en contact de friction par au moins un élément élastique axialement.12. Device according to any one of the preceding claims, characterized in that it comprises braking means (33) comprising a plurality of discs held in friction contact by at least one resilient element axially.
13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comprend des moyens de freinage comprennant un joint en contact de friction avec une surface cylindrique de la partie tournante. 13. Device according to any one of the preceding claims, characterized in that it comprises braking means comprising a seal in friction contact with a cylindrical surface of the rotating part.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0007297 | 2000-06-07 | ||
FR0007297A FR2810088B1 (en) | 2000-06-07 | 2000-06-07 | BRAKE BEARING |
PCT/FR2001/001702 WO2001094800A1 (en) | 2000-06-07 | 2001-06-01 | Instrumented antifriction bearing for control wheel |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1287266A1 true EP1287266A1 (en) | 2003-03-05 |
Family
ID=8851051
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01940663A Withdrawn EP1287267A1 (en) | 2000-06-07 | 2001-06-01 | Locked antifriction bearing |
EP01940662A Withdrawn EP1287266A1 (en) | 2000-06-07 | 2001-06-01 | Instrumented antifriction bearing for control wheel |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01940663A Withdrawn EP1287267A1 (en) | 2000-06-07 | 2001-06-01 | Locked antifriction bearing |
Country Status (6)
Country | Link |
---|---|
US (2) | US6868948B2 (en) |
EP (2) | EP1287267A1 (en) |
JP (2) | JP2003536030A (en) |
CA (2) | CA2412354A1 (en) |
FR (1) | FR2810088B1 (en) |
WO (2) | WO2001094801A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2848624B1 (en) * | 2002-12-17 | 2005-12-09 | Skf Ab | COMPACT BRAKE BEARING BEARING |
FR2880664B1 (en) * | 2005-01-11 | 2010-03-26 | Timken France | CORRESPONDING FRICTION DEVICE, MODULE, AND STEERING COLUMN |
US7694316B2 (en) * | 2005-05-09 | 2010-04-06 | The Invention Science Fund I, Llc | Fluid mediated disk activation and deactivation mechanisms |
US10378896B2 (en) * | 2006-02-27 | 2019-08-13 | Trimble Inc. | Method and system for planning the path of an agricultural vehicle |
US20070251775A1 (en) * | 2006-05-01 | 2007-11-01 | Hehl John F Sr | Selective engagement apparatus and method |
US7717241B2 (en) * | 2006-05-01 | 2010-05-18 | American Precision Industries, Inc. | Braking or clutching device |
JP5196267B2 (en) * | 2009-01-30 | 2013-05-15 | 株式会社ジェイテクト | Steering column bearing |
JP6439480B2 (en) * | 2015-02-13 | 2018-12-19 | 日本精工株式会社 | Bearing cap with sensor unit and rolling bearing unit |
CN106741118A (en) * | 2016-12-30 | 2017-05-31 | 杭州昱透实业有限公司 | A kind of variable damping device |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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GB183660A (en) * | 1921-06-09 | 1922-08-03 | Herbert Cawthorne Gibbs | Improvements in shock absorbers for motor cars and like vehicles |
FR648646A (en) * | 1928-02-11 | 1928-12-12 | Nicolle Et Cie P | Oscillation brake for motor vehicles and other applications |
US2320878A (en) * | 1942-01-29 | 1943-06-01 | Gen Motors Corp | Brake |
FR1115180A (en) * | 1954-11-30 | 1956-04-20 | Steering wheel | |
US2924988A (en) * | 1957-09-23 | 1960-02-16 | Gen Motors Corp | Transmission control |
US3025714A (en) * | 1960-09-12 | 1962-03-20 | Gen Motors Corp | Transmission control |
JPS4940126A (en) * | 1972-08-17 | 1974-04-15 | ||
US3762238A (en) * | 1972-09-14 | 1973-10-02 | Gen Motors Corp | Transmission control |
DE2501521C3 (en) | 1975-01-16 | 1978-03-23 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart | Measuring device for steering values of vehicles, in particular motor vehicles |
JPS55163545A (en) * | 1979-06-07 | 1980-12-19 | Ricoh Co Ltd | Two-color electrophotographic copying method and its device |
JPS61192974A (en) * | 1985-02-20 | 1986-08-27 | Matsushita Refrig Co | Four way type valve for refrigerating cycle |
JPS63155012A (en) * | 1986-12-19 | 1988-06-28 | Toshiba Corp | Method for attaching aspherical lens |
DE3725972C2 (en) * | 1987-08-05 | 1998-09-10 | Schaeffler Waelzlager Ohg | Rolling bearing slewing ring |
JP2555410B2 (en) * | 1988-03-30 | 1996-11-20 | 建設省土木研究所長 | Dual-mode vehicle steering system |
DE3914289A1 (en) * | 1989-04-29 | 1990-10-31 | Schaeffler Waelzlager Kg | RADIAL ROLLER BEARING |
DE19510717C2 (en) | 1995-03-24 | 1997-01-30 | Jungheinrich Ag | Electric steering device for industrial trucks |
FR2750181B1 (en) * | 1996-06-21 | 1998-07-31 | Rks Sa | ORIENTATION BEARING WITH INTEGRATED SENSOR |
DE19634102C1 (en) * | 1996-08-23 | 1997-12-11 | Daimler Benz Ag | Steering wheel arrangement for road vehicle |
FR2762652B1 (en) * | 1997-04-29 | 1999-06-18 | Skf France | ROLLING BEARING WITH INFORMATION SENSOR |
ATE236822T1 (en) * | 1998-05-20 | 2003-04-15 | Continental Teves Ag & Co Ohg | FIXING A STEERING ANGLE SENSOR |
FR2782970B1 (en) | 1998-09-03 | 2000-10-13 | Skf France | STEERING WHEEL DEVICE |
-
2000
- 2000-06-07 FR FR0007297A patent/FR2810088B1/en not_active Expired - Fee Related
-
2001
- 2001-06-01 WO PCT/FR2001/001703 patent/WO2001094801A1/en active Application Filing
- 2001-06-01 US US10/296,985 patent/US6868948B2/en not_active Expired - Fee Related
- 2001-06-01 WO PCT/FR2001/001702 patent/WO2001094800A1/en active Application Filing
- 2001-06-01 EP EP01940663A patent/EP1287267A1/en not_active Withdrawn
- 2001-06-01 EP EP01940662A patent/EP1287266A1/en not_active Withdrawn
- 2001-06-01 JP JP2002502323A patent/JP2003536030A/en active Pending
- 2001-06-01 CA CA002412354A patent/CA2412354A1/en not_active Abandoned
- 2001-06-01 US US10/297,716 patent/US6984071B2/en not_active Expired - Fee Related
- 2001-06-01 CA CA002411746A patent/CA2411746A1/en not_active Abandoned
- 2001-06-01 JP JP2002502322A patent/JP2003536029A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0194800A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2810088B1 (en) | 2004-06-04 |
JP2003536029A (en) | 2003-12-02 |
US6868948B2 (en) | 2005-03-22 |
US20040052439A1 (en) | 2004-03-18 |
US20030173161A1 (en) | 2003-09-18 |
CA2411746A1 (en) | 2001-12-13 |
JP2003536030A (en) | 2003-12-02 |
WO2001094801A1 (en) | 2001-12-13 |
WO2001094800A1 (en) | 2001-12-13 |
FR2810088A1 (en) | 2001-12-14 |
CA2412354A1 (en) | 2001-12-13 |
EP1287267A1 (en) | 2003-03-05 |
US6984071B2 (en) | 2006-01-10 |
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