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
• • 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
  • B60N2/22—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 seat fitting for a motor vehicle seat, with
• Seat fittings of the type mentioned, as they are known, for example, from DE 10 2008 036 647, are used in motor vehicle seats for adjusting the adjustable seat back relative to the seat back, wherein a fitting part with the seat part and another fitting part is connected to the backrest.
• twisting of the eccentric is effected by a rotation of the drive shaft, whereby a tumbling rolling of the sprockets in the manner of a wobble mechanism is achieved. In accordance with the number of teeth difference, this results in a pivoting of the fitting parts to each other.
• Seat fittings of the type mentioned allow the realization of a continuous adjustment, wherein the space required for the seat fitting space is extremely small.
• the eccentricity of the eccentric is suitable to bring about a self-locking, which ensures the seat fitting reliably in each set position.
• the predetermined by the seat fittings pivoting range of a backrest relative to a seat part is usually achieved by externally arranged on the fitting parts stops. Such stops and their exact positioning are required to prevent jamming at the ends of the adjustment, which is particularly necessary for electrically driven seat fittings.
• the attacks usually arranged on the outside of the seat fittings have the disadvantage that they are subject to a movement. tion space must be kept free in the swivel range of the seat fitting.
• the design of the end stops also leads to increased manufacturing costs and ultimately entails the risk of pinching both upholstery as well as for the user.
• the invention has for its object to provide a seat fitting of the type mentioned, the swivel range is set reliably by appropriate Mitteil.
• An adjustment of the seat fitting according to the invention whereby a displacement of the upper fitting part is achieved with respect to the lower fitting part, takes place by a rotation of the axially extending to the ring gear drive shaft.
• This results in a drive of the eccentric which causes a rolling adjustment of the gear relative to the ring gear, as a result of which the fitting upper part is pivoted relative to the fitting lower part.
• the gear Due to the system, the gear is arranged within the ring gear and performs during the adjustment caused by the eccentric wobble motion.
• the gear or the ring gear has a cam receiver and the wheel not having the cam receiver has a stop cam engaging in the cam receiver.
• the cam receptacle and the stop cam are arranged in a ring portion between the outer toothing and the bore of the gear.
• the arrangement of cam receiver or stop cam on the ring gear in a region which is covered by the aforementioned cam or the stop cam ring portion of the gear is effected.
• the configuration of the cam receptacle determines via the stop cam the adjustment range of the fitting lower part relative to the fitting upper part, wherein the stop cam can be adjusted in the area between the opposite side surfaces of the cam receptacle.
• the inventive design of the adjustment range of the gear relative to the ring gear by means of an adjustable in a cam recording stop cam can be implemented in a particularly simple and cost-effective manner, for the production only arranged a stop cam and a cam holder must be formed.
• the embodiment of the invention has the advantage that due to the done within the seat fitting arrangement of stop cam and cam recording the risk of trapping foreign parts can be completely excluded. Furthermore, the seat fitting of the invention over known seat fittings with external stops on a smaller space.
• the configuration of the cam receiver and the stop cam engaged with the cam receiver can in principle be effected in any desired manner.
• the cam receptacle can be formed by a simple opening which has no specific adaptation to the movement range of the stop cam relative to the cam receptacle.
• the cam receptacle and / or the stop cam on a coaxial bore associated with the associated bore of gear or ring.
• the cam receiver within which the stop cam is adjustable, arranged coaxially to the central bore of the wheel, which has the cam holder up.
• the stop cam can have a coaxial course according to the cam receiver, wherein according to a particularly simple embodiment of the invention, the stop cam is formed by a circular cross-section pin. This is particularly easy to manufacture and connect with the stop cam bearing wheel.
• the pivoting range of the seat fitting is determined according to the invention by the interaction of stop cams and cam receiver, wherein the stop cam moves in the adjustment between the aligned in the circumferential direction, opposing side surfaces of the cam receiver, wherein at the ends of the pivoting region of the stop cam on the side surfaces of the cam holder comes to rest ,
• the side surfaces of the stop cam aligned in the circumferential direction have a shape adapted to the side surfaces of the cam receiver.
• the side surfaces of the cam receiver and the stop cam which come into contact with one another at the end of the pivoting range are matched to one another in such a way that the surfaces assigned to one another are planarized.
• a particularly reliable end stop is provided, wherein in particular a jamming of the side surface is prevented in a particularly advantageous manner.
• the arrangement of the stop cam on the gear or ring gear can, as already stated above, basically take place in any desired manner.
• the stop cam bspw. One-piece, z. B. be formed by embossing, with the gear or ring gear.
• the stop cam is arranged on a rotationally secure with the ring gear or gear connectable Anschlagno- ckenève.
• the stop cam is not formed integrally with the gear or ring gear, but arranged on a separate, rotatably connected to the ring gear or gear member which is positioned in the region between the ring gear and the gear. In the assembled state, the stop cam projects from the gear or ring gear connected to the stop cam carrier into the cam receiver of the other wheel.
• the use of a separate stop cam carrier facilitates the production of the seat fitting in a complementary manner and also increases the variability of the seat fittings that can be produced from the components.
• the arrangement of the stop dog carrier can basically be done in any way. So it is possible to weld the stop cam carrier with the gear or ring gear or glue, to design this so that it substantially completely fills the existing space or there is the possibility to provide additional support points.
• the stop cam support is designed and has the ring gear or the gear on a corresponding configuration that the stop cam support in the mounted state against rotation relative to the gear or Ring gear is secured.
• the stop cam carrier may, for example, have radially projecting projections which engage in corresponding recesses on the ring gear or the gear wheel.
• the stop cam carrier and the ring gear or gear may have a rotation blocking contour.
• This embodiment of the invention allows a simple and variable mounting of the seat fitting. An additional position assurance can possibly be achieved by another component.
• a separating ring with a clip device can be used to lock the stop cam carrier in its position on the toothed wheel or ring gear.
• the cam receiver can basically have any shape and be designed freely.
• An essential feature of the cam receiver is that it allows the adjustable recording of the stop cam and thereby limits the range of motion of the stop cam in the circumferential direction of the ring gear or gear through the side surfaces.
• the cam receiver can be formed by the simple opening in the ring gear or gear wheel.
• the cam receptacle is formed by a circulating in the assembled state cavity, which is interrupted by a blocking element.
• the cavity is formed in the assembled state between the gear and the ring gear and extends coaxially to the fitting axis.
• the design of the blocking element is freely selectable. However, this is particularly preferably made by embossing the ring gear or gear. Like the stop cam carrier, so the locking element can be individually positioned. This makes it possible to produce seat fittings that meet different customer requirements in a simple manner. Due to the system, the stop cam with respect to the cam receiver during a displacement of the ring gear relative to the gearwheel due to the rolling displacement produced by the eccentric describes a cycloidal trajectory within the cam. During the adjustment thus varies the directed in the radial direction of motion component relative to the circumferentially directed proportion of movement of the stop cam.
• the stop cam and the cam receptacle are designed such that the stop cam moved relative to the cam receptacle in an adjustment on a cycloidal trajectory comes into contact with the side surface of the cam receptacle in the region of the trajectory the movement component of the trajectory directed in the circumferential direction is greater than the component of movement directed in the radial direction.
• the cam receiver and the stop cam are matched to one another in such a way that they come into contact with one another when the movement component pointing in the circumferential direction outweighs the movement component directed in the radial direction. This can be prevented in a particularly reliable manner jamming of stop cam and cam receiver. The risk of jamming could exist if the stop cam and cam receiver come into contact with each other when the proportion of movement of the stop cam in the radial direction clearly exceeds that in the circumferential direction.
• the advantages achieved by the invention are already achieved by the design of the seat fitting with a cam receptacle and a stop cam.
• two or more cam receivers of the same length can be provided with associated stop cam.
• a plurality of cam receivers preferably two cam receivers, more preferably three cam receivers with different lengths in the circumferential direction on the ring gear or gear are arranged.
• This embodiment of the invention makes it possible, in particular when providing only one stop cam, in dependence on the mounting position of the gear relative to the ring gear, namely in the selection of the cam receiver in which the preferred example, a cam is arranged to determine seat fittings with different adjustment with identical components.
• This embodiment of the invention thus enables a cost-effective production of a seat fitting, which is adaptable with identical components to different manufacturer specifications.
• the design of the fitting to be connected to the seat part and the backrest upper part or fitting lower part is basically arbitrary.
• the upper fitting part are integrally formed with the ring gear and / or the lower fitting part in one piece with the gear.
• this embodiment of the invention can be dispensed with an additional assembly of ring gear and / or gear on the upper fitting part and / or lower fitting part.
• the thus developed seat fitting can thus be produced in a particularly simple and cost-effective manner, since in particular can be dispensed with additional assembly steps.
• the configuration of the eccentric for driving the gear relative to the ring gear can basically be configured in any desired manner. According to a particularly advantageous embodiment of the invention, however, the eccentric on a driver and two wedge segments. Depending on the configuration of the driver and its orientation relative to the wedge segments, which causes an eccentric arrangement of the gear relative to the longitudinal axis of the ring gear, an adjustment of the drive shaft can be set, in the area an adjustment no immediate displacement of the upper fitting part relative to the lower fitting part result Has.
• the use of a driver in conjunction with two wedge segments is characterized by their simple design and reliable function.
• FIG. 1 is an exploded view of a first embodiment of a seat fitting with a cam receiver and a cam;
• FIG. 2 shows a ring gear and a toothed wheel of a second embodiment of a seat fitting with three cam receivers
• Fig. 3 is a perspective view of a gear of the seat fitting of Fig. ⁇ ;
• FIG. 4 shows a plan view of the ring gear of FIG. 2 with three cam receivers and a stop cam arranged in a middle region of a cam receiver;
• FIG. 5 shows a plan view of the ring gear of FIG. 2 with a stop cam located in an end position
• FIG. 6 shows a plan view of the seat fitting of FIG. 1 with a stop cam arranged in a central region;
• FIG. 7 shows a plan view of the seat fitting of FIG. 1 with a stop cam arranged on a side surface of the cam receptacle;
• FIG. 8 shows an enlarged view of a stop cam arranged in a cam receiver with a marked trajectory
• FIG. 9 is an exploded view of a second embodiment of a seat fitting
• Fig. 10 is a perspective view of the gear of the seat fitting of Fig. 9 with a arranged thereon, a stop cam having stop ring and
• Fig. 11 is a perspective view of the Holrads of the seat fitting of Fig. 9 with the stop ring disposed thereon.
• a first embodiment of a vehicle seat fitting 1 is shown in an exploded view.
• the vehicle seat fitting 1 has a fitting upper part 2 and a fitting lower part 3, which are connectable to a seat part, not shown here, and a likewise not shown backrest of a motor vehicle seat.
• the fitting upper part 2 has an internal gear 5 exhibiting ring gear 21.
• the ring gear 21 In the area between the internal toothing 5 and an axially extending to the ring gear 21 bore 14, the ring gear 21 has a cam receiver 17. This extends coaxially to the bore 14th
• the lower fitting part 3 has a gear 4, which is provided on its side facing the fitting upper part 2 with a stop cam 16, which in the assembled state of the vehicle seat fitting 1, wherein the gear 4 is disposed within the ring gear 21, within the cam receiver 17.
• the gear 4 has a smaller number of teeth than the ring gear 21, so that when a relative to the ring gear 21 eccentric arrangement of the gear 4, this performs a tumbling movement relative to the fitting upper part 2.
• the vehicle seat fitting 1 has an eccentric, which is formed from two wedge segments 18 and a driver 15 arranged on a drive wheel 12.
• the wedge segments 18 In the assembled state of the vehicle seat fitting 1, the wedge segments 18 abut within a sliding ring 10, which is arranged in a bore 7 of the gear 4.
• the drive wheel 12 extends with a stub axle 13 along the axially extending to the ring gear 21 fitting axis 6, wherein the coaxial with the stub axle 13 arranged driver 15 is arranged with its end faces with the end faces of the wedge segments 18 engageable.
• the wedge segments 18 are biased away from each other in the circumferential direction by a spring 11, which are in their recesses 19 of the wedge segments 18 with their spring ends 20 which extend parallel to the fitting axis 6.
• a locking ring 9 which extends in the assembled state coaxially with the end of the stub axle 13.
• the center of the bore 7 of the toothed wheel 4 is offset from the fitting axis 6 passing through the center of the bore 14 by the eccentric dimension resulting from the difference in the pitch circles of the toothings.
• the self-adjusting sickle-shaped gap is filled by the mirror-image arranged wedge segments 18.
• a drive of the drive wheel 12 via a rotatably connected to the stub axle 13 handwheel or an electric motor drive, there is a displacement of the driver 15 in the direction of the free ends of the wedge segments 18 within the sliding ring 10. Due to the eccentricity rolls in an adjustment of Wedge segments 18 the gear 4 on the ring gear 21, wherein the stop cam 16 arranged in the cam receiver 17 moves on a cycloidal trajectory 24, as shown in Fig.
• the adjustment of the vehicle seat fitting 1 is determined via the stop cam 16 and the cam receiver 17, wherein the stop cam 16 moves within the cam receiver 17 between the side surfaces 22 of the cam receiver 17, wherein in the end positions of the vehicle seat fitting, the side surfaces 23 of the stop cam 16 with the side surfaces 22 of the cam holder 17 come into contact.
• the ring gear 21 differs from the ring gear 21 shown in FIG. 1 in that it has three cam receivers 17 of different lengths.
• the length of the cam receiver 17, in which the stop cam 16 is arranged, determines the pivoting range of the vehicle seat fitting 1.
• a second embodiment of a vehicle seat fitting la is shown in an exploded view.
• the seat fitting la - which otherwise largely coincides with the seat fitting 1 - a separate, designed as a stop ring 25 stop cam support, which is provided with a stop cam 16a.
• the stop ring 25 is rotationally fixed to the Gear 4a connected, so that the stop cam 16a is fixed relative to the gear 4a.
• the gear 4a has a recess 27 with a "flower-like" designed contouring 26 and the stop ring 25 has a correspondingly shaped shape, whereby there is a positive connection in the circumferential direction.
• stop ring 25 of the stop cam 16a projects in the axial direction of the ring gear 21a, wherein the stop cam 16a is rotatably disposed in the assembled state within the cam receiver 17a of the ring gear 21a.
• the circular cam receiver 17a formed on the ring gear 21 is interrupted by a stamped locking element 28 whose side faces form a stop for the stop cam 16a, whereby the adjustment movement of the ring gear 21a relative to the gear 4a is limited.
• a clip-in separating ring 29 is used, by means of which the stop ring 25 is secured against axial and radial displacement.

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=46642483

Family Applications (1)

Country Status (7)

Families Citing this family (11)

Family Cites Families (33)

• 2011
  • 2011-07-20 DE DE102011051990A patent/DE102011051990A1/de not_active Withdrawn
• 2012
  • 2012-07-12 CN CN201280035957.9A patent/CN103796871B/zh not_active Expired - Fee Related
  • 2012-07-12 KR KR1020147004441A patent/KR101591696B1/ko not_active IP Right Cessation
  • 2012-07-12 EP EP12745794.3A patent/EP2734411A1/de not_active Withdrawn
  • 2012-07-12 JP JP2014520614A patent/JP5797337B2/ja not_active Expired - Fee Related
  • 2012-07-12 WO PCT/EP2012/063716 patent/WO2013010918A1/de active Application Filing
  • 2012-07-12 US US14/233,587 patent/US9315122B2/en not_active Expired - Fee Related

Non-Patent Citations (2)

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