Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
  • B60N2/206—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access to a position in which it can be used as a support for objects, e.g. as a tray
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
  • B60N2/225—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms
  • B60N2/2252—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear

Definitions

• the present invention generally relates to articulation assemblies for adjusting the inclination between the backrest and the seat of a motor vehicle seat, and aims in particular those of "continuous" type allowing a fine adjustment of this inclination.
• Such a "continuous" articulation assembly which is described, for example, in the French application FR 2743032, conventionally comprises:
• a second flange connected in rotation with an internal toothing having a second axis parallel and remote from said first axis, said first and second flanges being provided to be respectively fixed to the seat and back of the seat;
• the present invention therefore aims to provide an economic assembly of articulation to the manufacture which provides a fine adjustment of the angle of inclination between the seat and the back of the seat, while also allowing to quickly move this folder between his raised position and a lowered position allowing access to the rear seats of the vehicle.
• a detachable joint assembly for a motor vehicle seat comprising:
• a first flange comprising an internal toothing centered on its axis
• a second flange having an axis parallel and slightly spaced from the axis of said first flange, said first and second flanges being provided to be respectively fixed to the seat and back of the seat or vice versa;
• an eccentric mechanism connecting said internal toothing to an external toothing centered on the axis of said second flange, and comprising a number of teeth at least one tooth lower than that of said internal toothing
• said hinge assembly being characterized in that said external toothing is mounted on a pinion, and in that it further comprises a disengaging disc rotatably connected to said second flange, and a disengaging member operable in rotation and adapted to drive said disengagement disc in axial translation to pass said articulation assembly of a locked configuration in which complementary coupling means located on said clutch disc and said pinion cooperate to rotate said gear teeth outer and said second flange, in an unlocked configuration in which said complementary coupling means are spaced apart from each other so that said external toothing and said second flange are disengaged in rotation;
• cam path protrusion extending symmetrically on either side of a diametral plane passing through the axis of said second flange, and following a circumferential goggle hat profile.
• the hinge assembly according to the invention can very easy to move from a "continuous" type configuration in which the user can fine-tune the angle of inclination between the seat and the backrest of the seat, to a configuration of "discontinuous” type in which the two flanges can rotate freely around each other so that the user can quickly vary this angle of inclination, in particular to allow access to the rear seats or to make a tablet of this folder .
• the bosses forming cam paths extend symmetrically on either side of a diametral plane passing through the axis of the second flange, makes it possible to get rid of a different referencing of these two parts for each of the two lateral sides of the seat.
• the hinge assembly according to the invention can thus be mounted indifferently on both sides of the seat, which generates a significant reduction in its cost price by volume effect.
• hinge assembly taken alone or in combination:
• cam path boss comprises two downward bearing ramps which extend on either side of a raised platform
• cam path boss and said complementary cavity are respectively located on said clutch disc and on said disengaging member
• said boss forming a camming path protrudes axially from an annular recess formed in said disengaging disc and intended to receive, in said locking configuration, a flange which comprises said disengaging member and in which said cavity is formed;
• said boss forming a cam path and said complementary cavity are situated respectively on said disengaging member and on said disengaging disk;
• said articulation assembly comprises three said bosses and three said complementary indentations angularly distributed in a regular manner;
• said complementary coupling means comprise an octagonal rib extending from said pinion and intended to cooperate with a complementary octagonal groove formed in said disengaging disk;
• said articulation assembly comprises resilient biasing means located between said second flange and said clutch disc, and continuously urging the latter in the direction of said pinion; and or
• the present invention also aims in a second aspect, a motor vehicle seat comprising two such articulation assemblies extending symmetrically vis-à-vis the median plane of said seat.
• FIG. 1 shows an exploded perspective view of three quarters before the components of articulation assembly according to the invention
• FIG. 2 shows an exploded perspective view of three quarter of the constituent elements of the hinge assembly
• FIG. 3 represents a perspective view of the disengaging disk that comprises the hinge assembly according to the invention
• FIG. 4 shows a cross-sectional view of the hinge assembly according to the invention occupying its locking configuration
• FIG. 5 shows a view similar to Figure 4 in which the hinge assembly according to the invention occupies its unlocking configuration.
• the hinge assembly 1 shown in the figures is integrated into a motor vehicle seat (not shown) and allows to adjust the relative inclination between the backrest and the seat of this seat.
• the hinge assembly 1 comprises a first flange 2 and a second flange 3 respectively fixed to the backrest and the seat of the seat or vice versa, preferably by welding.
• the peripheral flanges 21, 31 of the two flanges 2 and 3 are held contiguous to each other by means of an annular retaining ring 4.
• Each flange 2, 3 has a respective central opening 22, 32 of circular shape.
• the flange 2 has on the inner face an internal toothing 23 centered on its axis.
• the flange 3 has an axis parallel and slightly distant from that of the flange 2, as is clearly visible in Figures 4 and 5.
• the two flanges delimit a space inside which are positioned a disengaging member 5, a disengaging disc 6, a wave washer 7 forming a spring, a pinion 8, an eccentric mechanism (not shown for the sake of simplification of the figures) , and an eccentric control member 9.
• the disengaging disc 6 has a circular central opening 61 of the same diameter as the opening 32 of the flange 3, and centered on the axis of this flange 3.
• a housing 33 of corresponding shape machined on the inner side of the flange 3 (FIG. 2). As illustrated in the figures, it comprises three radial peripheral protrusions 62 angularly distributed in a regular manner, which are housed in three corresponding indentations 36 located at the periphery of the housing 33, so that the disc 6 and the flange 3 are integral in rotation.
• the disengaging disc 6 also has on its face facing away from the flange 3 and towards the disengaging member 6, an annular recess 63 extending around the periphery of its opening 61, as well as an octagonal groove 64 s extending near its peripheral edge.
• bosses 65 angularly distributed regularly, take root along the circumference of an imaginary circle located near the outer edge of this annular recess 63. They extend symmetrically on either side of a diametral plane passing through the axis of the flange 3, and following a circumferential profile in a gendarme hat. Each boss 65 thus forms a cam path constituted by two downward bearing ramps 65A, 65C which extend on either side of a raised plate 65B.
• the corrugated spring washer 7 also has a circular central opening 71 of the same diameter as the opening 32 of the flange 3, and centered on the axis of this flange 3.
• this washer 7 is sandwiched inside the housing 33 between the flange 3 and the clutch disk 6, so that it constantly stresses the clutch disk 6 in the direction of the pinion 8.
• the disengaging member 5 comprises a cylindrical sleeve 51 centered on the axis of the flange 3, which extends from a collar 52 and successively passes through the clutch disc 6, the corrugated washer 7 and the flange 3 via their respective openings 61 , 71 and 32.
• the free end 51A of the sleeve 51 protruding from the flange 3 is intended to receive a drive rod mechanically connected to a control wheel (not shown in the figures) whose rotation causes the control wheel to rotate. release member 5.
• the flange 52 whose shape is complementary to the annular recess 63 formed in the clutch disc 6, has on its face oriented opposite the clutch member 6, three cavities 53. These indentations 53, angularly distributed regularly, take root along the circumference of an imaginary circle located near the outer edge of the flange 52, and are complementary to the three bosses 65 of the clutch disc 6 with which they are intended to cooperate.
• the pinion 8 has an external toothing 81 and a central opening 82 centered on the axis of the flange 3, this opening 82 having a diameter slightly greater than that of the flange 52 of the release member 5.
• This pinion 8 also has on its face facing away from the flange 2, an octagonal rib 83 extending close to its peripheral edge and which is complementary to the octagonal groove 64 of the clutch disc 6 with which it is intended to cooperate.
• the external toothing 81 which has a number of teeth less than one tooth to that of the internal toothing 23 of the flange 2, is engrained with the latter.
• An eccentric mechanism known per se and not shown in the figures for the sake of simplification, is disposed inside the central opening 82 made in the pinion 8.
• the eccentric control member 9 of this mechanism is made in one piece and comprises two cylindrical hubs 91, 92 extending on either side of a notched disc 93 housed in the opening 82 of the pinion 8, and having drive fingers 94 axially projecting towards the first flange 2.
• the cylindrical hubs 91, 92 are respectively centered on the axis of the first flange 2 and that of the second flange 3.
• first cylindrical hub 91 is received inside the opening 22 of the first flange 2 while the second cylindrical hub 92 is received inside the sleeve 51 of the clutch disc 6.
• the first hub 91 also has a central recess 95 provided for receiving a drive rod connected to a second control wheel.
• This articulation assembly has a first locking configuration, illustrated in FIG. 4, in which the clutch disk 6 is pressed by the action of the wave washer 7 forming spring, against pinion 8; with the octagonal rib 83 of this pinion which is housed in the complementary groove 64 of the disengaging disk 6, so that the flange 3, the disengaging disk 6 and the pinion 8 are all integral in rotation.
• the flange 52 of the release member 5 is housed in the annular recess 63 formed in the clutch disc 6, with the three bosses 65 of this clutch disc 6 which coincide with the three complementary indentations 53 of this release member 5.
• this disengaging member 5 causes the ramps 65A (or 65C in the direction of rotation printed on this disengagement member 5) to slide off the bosses 65 along the corresponding counter ramps of the indentations 53, and until each of the bosses 65 emerges completely from the footprint 53 in which it was contained, with its raised plate 65B which rests against a flat portion of the flange 52 located in the extension of this footprint 53.
• This axial translation of the disengaging disc 6 has the effect of detaching it in rotation (and the flange 3) vis-à-vis the pinion 8, the octagonal rib 83 of this pinion 8 is no longer housed in the groove 64 of this disengaging disc 6).
• the hinge assembly 1 is then in unlocked configuration in which the two flanges 2 and 3 can rotate freely relative to each other, which allows in particular to pass very quickly the record of a raised position in an intermediate or fully lowered position allowing access to the rear seats of the vehicle or the tablet of this folder.
• the hinge assemblies according to the invention are intended to be mounted in pairs on a motor vehicle seat: each hinge assembly being disposed on a corresponding lateral side of this seat.
• the two articulation assemblies extend symmetrically vis-a-vis the median plane of the seat and synchronized with each other so that the actuation of one of the two control wheels causes the two eccentric control members 9 or the two disengaging members 5 to rotate simultaneously.
• the bosses 65 of the clutch disc 6 (and the complementary indentations 53 of the clutch member 5 which are complementary thereto) extend symmetrically on either side of a diametrical plane. , makes it possible to overcome a different referencing of these two parts for each of the two lateral sides of the seat.
• the hinge assembly according to the invention can thus be mounted indifferently on both sides of the seat, which generates a significant reduction in its cost price by volume effect.
• the number of 65-cavity bosses 53 is different from three and equal for example to 2 or 4.
• the arrangement of the bosses 65 forming cam paths and cavities 53 is reversed: the bosses rooted on the flange 52 of the clutch member 5 while the fingerprints are formed at the level of the annular recess 63 of the clutch disc 6.
• the means for securing in rotation the disengaging disc and the pinion comprise instead of the octagonal rib 83 and the groove 64, a protuberance adapted to cooperate with a complementary cavity;
• the means for ensuring the axial sliding assembly of the disengaging disc 6 inside the flange 3 are also different: the radial peripheral protrusions 62 cooperating with the three corresponding indentations 36 situated on the periphery of the housing 33 being replaced by a protuberance adapted to cooperate with a complementary imprint of greater depth; and or
• the corrugated washer is replaced by another elastic return means such as a helical spring.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49949856

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (5)

• 2013
  • 2013-10-08 FR FR1359741A patent/FR3011513B1/fr not_active Expired - Fee Related
• 2014
  • 2014-10-03 CN CN201480055642.XA patent/CN105636826B/zh not_active Expired - Fee Related
  • 2014-10-03 WO PCT/FR2014/052511 patent/WO2015052414A1/fr active Application Filing
  • 2014-10-03 EP EP14787239.4A patent/EP3055162A1/de not_active Withdrawn

Non-Patent Citations (2)

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