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
  • 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
• • 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
  • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
  • B60N2/02246—Electric motors therefor
• • 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

Definitions

• the invention relates to a fitting for a vehicle seat with the features of the preamble of claim 1.
• DE 199 38 666 A1 discloses a fitting of this type in which the eccentric necessary for the drive is essentially defined by the driving ring arranged radially on the inside and the two wedge segments arranged radially outside of it.
• the driver ring and a driver bush for driving the eccentric are connected to one another in a rotationally fixed manner by means of a recess or two lugs.
• the wedge segments rest against a slide bearing bushing of the second coating part arranged radially outside and slide along it with little friction during the rolling motion.
• a fitting of a similar design is described in DE 101 44 840 AI, in which the driver ring and the driver bush are connected to one another in a rotationally fixed manner by means of a transmission profile.
• the invention is based on the object of finding an alternative structure to a fitting of the type mentioned. This object is achieved according to the invention by a fitting with the features of claim 1. Advantageous refinements are the subject of the dependent claims.
• the driver ring surrounds the wedge segments, ie the driver ring is arranged radially outside the wedge segments, can result in advantages for the force relationships, the contact of the wedge segments on the outside with at least one outer supporting line on the driver ring Defined contact results, based on which the directions of force and angular relationships can be optimized with regard to the gear engagement and self-locking.
• the supporting line which is fixed in place on the wedge segments or the driving ring, ensures that the line contact is independent of external forces and serves to release play.
• two axially offset driver rings can also be provided.
• each wedge segment which are preferably mounted on the inside of the first fitting part, each lies preferably on the outside with an outer supporting line on the driving ring, while it preferably lies on a collar of the fitting part by means of two inner supporting lines.
• the latter leads to a defined alignment of the wedge segments relative to this fitting part.
• one supporting line of the pair is preferably arranged in front of and behind the individual supporting line.
• the driver ring is preferably rotatably supported by means of a plain bearing (with low friction), in particular in a plain bearing bush, which results in a smooth rolling motion of the two fitting parts.
• a plain bearing with low friction
• a plain bearing bush which results in a smooth rolling motion of the two fitting parts.
• the friction between the driver ring and the fitting part adjacent to it is preferably smaller than the other friction pairings that occur, for example between the driver ring and the wedge segments and and between the wedge segments and the fitting part adjacent to them , ie in particular between the wedge segments and the collar pull associated with the first fitting part.
• the wedge segments are preferred stored on both sides, ie inside and outside, using a "steel on steel" (greased) material combination.
• a driver bushing provided for driving the eccentric and the driver ring can be formed in one piece or separately, in which case they interact in a rotationally fixed manner.
• the separate training can simplify assembly and enable different material selection.
• the entrainment ring is preferably made of steel or another, preferably sintered, metallic material. In order to simplify assembly, it is sufficient if the driver ring is only provided over the circumference of the wedge segments, ie is not completely closed, as long as the rotationally fixed interaction with the driver bush is ensured.
• the rotationally fixed interaction of the driver bush and driver ring by means of a transmission profile has the advantage that higher loads can be transmitted via this connection. This improves the possibility of using the fitting as a motor-adjustable fitting and reduces the peak load on the individual components. As a rule, with two fittings according to the invention and a common drive shaft, a reliable synchronization when mounting the drive shaft is possible.
• the fitting according to the invention is preferably designed for a motor drive, but can also be driven manually.
• the invention can also be used with other motorized or manually driven gear fittings, regardless of whether an eccentric made of wedges or a fixed eccentric is provided.
• 1 is an exploded view of the embodiment, the driver bush is shown from a different direction
• 2 shows a schematic illustration of a vehicle seat with two fittings according to the invention
• FIG. 3 shows a radial section through the exemplary embodiment along the line III-III in FIG. 4,
• Fig. 4 is an axial section through the embodiment along the line IV-IV in Fig. 3, and
• Fig. 5 is an enlarged view of a wedge segment with parts of the collar and the driving ring.
• a vehicle seat 1 for a motor vehicle which is only indicated in the drawing, has a seat part 3 and a backrest 4 whose motor inclination is adjustable relative to the seat part 3.
• An electric motor 5, which is attached to the structure of the backrest 4, is provided as the drive for the inclination adjustment.
• the electric motor 5 rotates a drive shaft 7, which is arranged horizontally in the transition region between the seat part 3 and the backrest 4.
• the drive shaft 7 engages non-rotatably in a fitting 10 in a manner described later.
• the fitting 10 is designed as a gear fitting, in which a first fitting part 11 and a second fitting part 12 are connected to one another via a gear for adjusting and locking.
• 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 supporting the driving electric motor 5 (in the present case the structure of the backrest 4), which is why in the exemplary embodiment the first component 11 is fixed to the backrest and is therefore shown in the drawing above.
• the second fitting part 12 is fixed to the seat part in the exemplary embodiment and is shown in the drawing below. In a different arrangement of the electric motor and in the case of manually driven fittings, the positions of the fitting parts 11 and 12 can be exchanged.
• a gear 16 with external teeth is formed on the second fitting part 12 and a toothed ring 17 with an internal toothing on the first fitting part 11, which mesh with one another.
• the diameter of the tip circle of the external toothing of the gearwheel 16 is smaller by at least one tooth height than the diameter of the root circle of the internal toothing of the toothed ring 17.
• the corresponding difference in the number of teeth of the toothed wheel 16 and the ring gear 17 enables a rolling motion of the ring gear 17 on the toothed wheel 16.
• the first fitting part 11 has on the side facing the gear 16 concentrically with the internal toothing of the ring gear 17 a molded collar 19.
• a driver bushing 21 is in the collar 19 in the collar 19 by means of a hub with play
• the driver bushing 21 which is made of plastic or steel, is central with a bore that matches a spline profile of the drive shaft 7
• the driving bushing 21 has a step 24 with a larger diameter than the hub 22 and then a cover disk 25 with a larger diameter than the step 24.
• the step 24 has a radially outwardly directed external toothing 24 ', in the area of which it receives a driver ring 26 made of steel, which in some areas has an internal toothing 26' which fits positively and completely into the external toothing 24 '. takes effect, which defines a transmission profile.
• the toothing instead of the toothing, other form-fitting transmission profiles with ribs, polygons or the like are also possible.
• the positive fit can take place during assembly while displacing the material of the gradation 24.
• the MitEnglishemng 26 encloses in a manner described in more detail below two radially arranged within the same wedge segments 27 made of steel, which are mounted in a manner also described in more detail below on the outside of the collar pull 19.
• the driver ring 26 in turn supports a sliding bearing bush 28, which is pressed directly or with the interposition of an elastic element into the second fitting part 12 in a rotationally fixed manner on the outside.
• the driver ring 26 has an axially projecting driver segment 29 which fits between the narrow sides of the wedge segments 27 and has play its radially inward-facing side carries the internal toothing 26 '.
• the driver segment 29, the step 24 of the driver bushing 21 and a section of the bore 23 together with the drive shaft 7 thus lie in one plane, which avoids multi-axis stress conditions.
• On the inside of the cover plate 25 of the driving bushing 21 two protruding pins 32 or generally cams are formed, which each abut one of the two wedge segments 27 on the end face and secure this in the axial direction.
• the wedge segments 27 with their outer sides 27 ′ are not flat against the inner surface of the driving ring 26 and with their inner sides 27 ′′ not flat against the collar pull 19 on, but on the outside 27 'only on at least one outer support line 33 or on the inside 27 "only on at least one, in the present case two inner support lines 34.
• These support lines 33 and 34 are designed as stationary geometric elevations, for example in a kind flat waveform, and ensure that the wedge segments 27 on the collar 19 or drive ring 26 are independent of the external forces.
• the system by means of supporting lines 33 and 34 serves to release play and to control the force directions and angular relationships in the bearing point Possibility to change the control behavior of the wedge segments 27 in K
• effective wedge angles can be set in a targeted manner so that the tooth engagement between gear 16 and ring gear 17 and the self-locking of the fitting 10 can be optimized.
• the support lines 33 and 34 run perpendicular to the plane of the drawing, ie in the axial direction. Viewed in the circumferential direction, there is an inner support line 34 in front of and behind the outer support line 33 in the present case.
• the two inner support lines 34 serve not only to release play, but also to increase your strength.
• the mutually facing broad sides of the wedge segments 27 each have an angled end-piece of an annular spring 35, each with a recess defined by projecting material parts, which presses the wedge segments 27 apart in the circumferential direction, with the wedge segments 27 blocking during operation or when the backrest 4 starts up against a load, the radially outer, projecting parts of the material can touch and act on one another.
• the driver bushing 21 is axially secured on the outside of the first fitting part 11 by a clip ring 43.
• a sealing ring 44 is provided between the shape for the gear wheel ⁇ and the cover plate 25 of the driving bushing 21.
• a mounting plate 45 is welded to the two fitting parts 11 and 12, which overlaps the other fitting part without impeding the adjustment movement. For the sake of clarity, only one of these holding plates 45 is shown in FIG. 1.
• An eccentric is defined by the driving ring 26 and the wedge segments 27, which presses the toothed wheel 16 into the toothed ring 17 at an engagement point defined in this way in the direction of extension of the eccentricity.
• a torque is first transmitted to the driving bushing 21 and then to the eccentric thus defined, which slides along the sliding bearing bushing 28, shifting the direction of the eccentricity and thus shifting the point of engagement of the gear 16 in the gear ring 17, which presents itself as a tumbling rolling movement.
• the slide bearing bushing 28 defines an outer sliding surface for the eccentric, while the collar pull 19 * defines an inner sliding surface for the eccentric, the eccentric during the rolling motion slides along the sliding surfaces.
• the friction between the plain bearing bush 28 and the driving ring 26 is preferably significantly smaller than that between the wedge segments 27 and the collar pull 19 (steel on steel, greased) and than that between the driving ring 26 and the wedge segments 27 (steel on steel, greased), for example, only about a fifth each.
• the outer supporting lines 33 are formed on the driving ring 26 instead of on the wedge segments 27. Additionally or alternatively, the inner supporting lines 34 can be formed on the collar pull 19 instead of on the wedge segments 27.

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)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=34609627

Family Applications (1)

Country Status (8)

Cited By (3)

Families Citing this family (51)

Citations (3)

Family Cites Families (30)

• 2004
  • 2004-02-12 DE DE102004007043A patent/DE102004007043B3/de not_active Expired - Fee Related
• 2005
  • 2005-01-25 DE DE502005009082T patent/DE502005009082D1/de not_active Expired - Lifetime
  • 2005-01-25 EP EP05706990A patent/EP1713659B1/de not_active Expired - Lifetime
  • 2005-01-25 JP JP2006552490A patent/JP4381420B2/ja not_active Expired - Fee Related
  • 2005-01-25 WO PCT/EP2005/000677 patent/WO2005077707A1/de not_active Ceased
  • 2005-01-25 CN CNB2005800047740A patent/CN100445126C/zh not_active Expired - Fee Related
  • 2005-01-25 BR BRPI0507621A patent/BRPI0507621B1/pt not_active IP Right Cessation
  • 2005-01-25 KR KR1020067018580A patent/KR101082732B1/ko not_active Expired - Fee Related
• 2006
  • 2006-08-10 US US11/502,260 patent/US7281765B2/en not_active Expired - Fee Related

Patent Citations (3)

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