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
  • B60N2/22—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
• • 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
• • 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
• • 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
  • B60N2/2254—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 provided with braking systems

Definitions

• the invention relates to a fitting for a vehicle seat with the features of the preamble of claim 1.
• the invention is based on the object to improve a fitting of the type mentioned. This object is achieved by a fitting with the features of claim 1.
• Advantageous embodiments are the subject of the dependent claims.
• the two wedge segments is mounted by means of a second sliding bearing or rolling bearing with low friction on the first fitting part, that is mounted on both sides by means of plain bearings or bearings, wherein the friction between the sliding bearing (or rolling bearing) and the relative to this sliding component is lower than the direct friction between the wedge segments and the fittings, reduce the losses when driving the fitting, ie during the adjustment movement, which increases the efficiency of the fitting. With the same output power, a lower drive power is thus necessary.
• the freedom from play and the strength are retained.
• the lower friction of the sliding bearing compared to ordinary steel is based on a special surface treatment and / or treatment.
• the lower friction of the rolling bearing compared to the sliding friction of ordinary steel is based on the rolling friction of the rolling elements.
• the plain bearings or roller bearings can also be provided in mixed combination.
• the wedge segments according to the invention can also be formed in each case on a disk, in which case the two (eccentric) disks are arranged axially offset from one another.
• a wedge segment is loaded higher, so that in principle there is a higher friction.
• the higher loaded wedge segment is mounted on both sides by means of plain bearings wedge segment.
• the other wedge segment or-also preferably preferred - both wedge segments be supported on both sides by means of plain bearings.
• the fitting according to the invention can be operated both manually and operated by a motor and be used in vehicle seats, preferably for adjusting the backrest inclination or the inclination of the seat cushion or a thigh support or the seat height.
• the driver can be one-piece or multi-part.
• a brake for said wedge segment is provided at least on a vehicle seat side, which holds the wedge segment in the resting state of the fitting and which drive the rolling movement is solved.
• a fitting is both reliable and low in terms of efficiency. On the other vehicle seat side no such brake needs to be provided in the fitting.
• a preferred brake is a wrap spring brake, which delivers a high output side blocking torque, but rotates with a drive-side introduction of a torque but with a low in comparison to the locking torque freewheeling torque.
• a pinch roller be provided running.
• the wrap spring brake generates its locking torque preferably by contact with a wrap spring bush, which is rotationally fixed to the second fitting part, preferably by a positive connection between suitable projections, for example, radially projecting arms, the wrap spring bushing and a production-related internal toothing of the second fitting part.
• the wrap spring brake is preferably disposed within the wrap spring so that it rests against the inner wall and their usually present wrap spring arms protrude radially inwardly. The latter are preferably arranged such that a cam of one or both wedge segments closes upon contact with a wrap arm and one or two cams of the driver rotating during the drive act on the wrap spring brake when it bears against a wrap spring arm.
• FIG. 2 is a partial view of the first embodiment with only partially hinted- tet driver
• Fig. 5 is an exploded view of the second embodiment
• Fig. 6 is a partial view of the second embodiment without driver.
• a vehicle seat 1 for a motor vehicle has a seat part 3 and a backrest 4 that is adjustable in its inclination relative to the seat part 3.
• a manually operated for the inclination adjustment handwheel 5 on one side of the vehicle seat 1 rotates a not shown drive shaft, which is arranged horizontally in the transition region between the seat part 3 and backrest 4 and on both sides of the vehicle seat 1 rotatably engages in each case a fitting 10.
• the backrest 4 is connected by means of the two fittings 10 with the seat part 3.
• the fitting 10 is designed as a geared fitting, in which a first fitting part 11 and a second fitting part 12 via a - as at least one of the two fittings 10 of the vehicle seat 1 self-locking - trained Exzenterumlaufgetriebe gear for adjusting and locking are connected.
• the two fitting parts 11 and 12 have a substantially flat shape and are made of steel.
• the first fitting part 11 is firmly connected to the structure of the handwheel 5 and the drive shaft (in the present case, the structure of the backrest 4), which is why in the exemplary embodiment, the first component 11 is leaning and therefore shown in the drawing above.
• the second fitting part 12 in the embodiment is fixed to the seat part, i. connected to the structure of the seat part 3, and shown in the drawing below.
• the positions of the fitting parts 11 and 12 can be exchanged as required.
• a toothed wheel 16 with external teeth and, on the first fitting part 11, a toothed ring 17 with internal toothing, which mesh with one another, are formed on the second fitting part 12.
• the diameter of the top circle of the external toothing of the toothed wheel 16 is smaller by at least one tooth height than the diameter of the root circle of the internal toothing of the ring gear 17.
• the corresponding difference of the number of teeth of toothed wheel 16 and ring gear 17 enables a rolling movement of the toothed ring 17 on the toothed wheel 16.
• the first fitting part 11 has on the side facing the gear 16 concentric with the internal toothing of the ring gear 17 on a molded collar 19.
• a driver 21 is mounted by means of a hub 22 with game.
• the plastic driver 21, by the arrangement of which the directional information used is defined, is centrally connected to a wedge wave profile of the drive shaft matching, axially extending bore 23 is provided.
• the driver 21 has an integrally formed driver segment 25, which is arranged sickle-shaped around a part of the collar 19 around.
• On the collar 19 are at least indirectly with its curved inner side two wedge segments 27 a and 27 b supported, which store with their curved outer sides in the second fitting part 12 rotatably pressed first slide bearing 28.
• the friction between the outside of the metal wedge segments 27a and 27b and the inside of the sleeve-shaped first sliding bearing 28 is significantly less than the direct friction between the wedge segments 27a and 27b and the fitting parts 11 or 12 would be.
• the driver segment 25 holds with play between the narrow sides of the wedge segments 27a and 27b, while the facing broad sides of the wedge segments 27a and 27b are each an angled end finger of a ring mecanicwi- ekelten spring, hereinafter referred to as omega spring 30, supported.
• the omega spring 30 presses the wedge segments 27a and 27b apart in the circumferential direction and thus provides the fitting 10 at rest without play.
• the driver 21 is axially secured on the outside of the first fitting part 11 by a clip-on circlip 31. To accommodate the axially acting forces is welded in a conventional manner to the two fitting parts 11 and 12 depending on a not shown in the drawing retaining plate which engages over the other fitting part, without hindering the adjustment movement.
• an eccentric which presses in extension of the direction of eccentricity, the gear 16 and the ring gear 17 at a so defined engagement point into one another.
• a torque is first transmitted to the driver 21 and then on the eccentric thus defined, which slides along the first sliding bearing 28 with displacement of the direction of eccentricity and thus under displacement of the point of engagement of the gear 16 in the ring gear 17th what is a staggering rolling movement of the fittings 11 and 12 together.
• a second sliding bearing 41 is provided to reduce this friction, which sits virtually immovably on the first wedge segment 27a and slides with low friction on the collar 19, so functionally corresponds to the first sliding bearing 28.
• the second sliding bearing 41 is formed as a ring segment, which extends over slightly less than the inside of the first wedge segment 27a, while in the second embodiment, the second sliding bearing 41 is formed as a nearly completely closed ring, on which also the less loaded wedge segment 27b sitting. Otherwise, apart from geometrical adaptations to the shape of the second slide bearing 41, the two exemplary embodiments coincide, identical and identical components bear the same reference numerals. In a modification to both embodiments, the second is
• Sliding bearing 41 is arranged on the inside of the collar 19 in a free area from the hub 22 and the more heavily loaded wedge segment 27a herein by means of a cantilever.
• the friction between the first wedge segment 27a and the collar 19 has not only an effect on the efficiency, but also on the self-locking of the gear of the fitting 10.
• this fitting 10 is provided in the resting state of the fitting 10 effective brake, in this case a wrap spring brake 44, which is arranged in a wrap spring bushing 46 and frictionally rests against the inner wall due to their bias.
• plastic wrap spring bushing 46 is rotatably disposed on the second fitting part 12 by three offset by 120 ° staggered groups of radially (and / or axially) projecting Schlingfederbuchsenarmen 48 positively into the formed on the back of the gear 16 by the embossing internal teeth to grab.
• the wrap spring brake 44 has at its ends in each case a radially inwardly projecting wrap spring arm 50.
• the first wedge segment 27a is provided with an axially projecting brake cam 51, which is arranged with play in the circumferential direction between the two wrap spring arms 50, i. in the area within it.
• An abutment of the brake cam 51 to a wrap spring arm 50 acts on the wrap spring brake 44, i.
• the wrap brake 44 brakes and prevents rotation of the eccentric defining components relative to the second fitting part 12. With the blockage of the eccentric and the first fitting part 11 is fixed relative to the second fitting part 12.
• a first driver lugs 53 and on the other hand in the region between the ends of the driver Mit lovedsegmentes 25 is arranged with approximately the same radial distance, a second driving cam 55 is provided, both of which project axially.
• the wrap spring arms 50 together with the brake cam 51 are arranged with play, ie the driving cams 53 and 55 are arranged outside the wrap spring arms 50 in the circumferential direction.

Landscapes

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

Priority Applications (8)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=36910867

Family Applications (2)

Family Applications After (1)

Country Status (9)

Cited By (2)

Families Citing this family (67)

Citations (5)

Family Cites Families (23)

• 2005
  • 2005-06-22 DE DE102005028779A patent/DE102005028779B4/de not_active Expired - Fee Related
• 2006
  • 2006-06-02 PL PL06754059T patent/PL1893437T3/pl unknown
  • 2006-06-02 JP JP2008517355A patent/JP5055273B2/ja not_active Expired - Fee Related
  • 2006-06-02 PL PL06754060T patent/PL1893438T3/pl unknown
  • 2006-06-02 DE DE502006005411T patent/DE502006005411D1/de active Active
  • 2006-06-02 CN CNA2006800228331A patent/CN101208221A/zh active Pending
  • 2006-06-02 DE DE502006009109T patent/DE502006009109D1/de active Active
  • 2006-06-02 KR KR1020077023044A patent/KR101313765B1/ko not_active Expired - Fee Related
  • 2006-06-02 EP EP06754060A patent/EP1893438B1/de not_active Ceased
  • 2006-06-02 KR KR1020077023045A patent/KR101279425B1/ko not_active Expired - Fee Related
  • 2006-06-02 EP EP06754059A patent/EP1893437B1/de not_active Ceased
  • 2006-06-02 BR BRPI0612751A patent/BRPI0612751B1/pt not_active IP Right Cessation
  • 2006-06-02 BR BRPI0612234-5A patent/BRPI0612234A2/pt not_active Application Discontinuation
  • 2006-06-02 WO PCT/EP2006/005254 patent/WO2006136274A1/de not_active Ceased
  • 2006-06-02 WO PCT/EP2006/005255 patent/WO2006136275A1/de not_active Ceased
  • 2006-06-02 CN CN2006800228327A patent/CN101208220B/zh not_active Expired - Fee Related
  • 2006-06-02 JP JP2008517356A patent/JP4970436B2/ja not_active Expired - Fee Related
• 2007
  • 2007-12-21 US US12/004,700 patent/US7789464B2/en not_active Expired - Fee Related
  • 2007-12-21 US US12/004,550 patent/US7455361B2/en active Active

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