Fitting for vehicle seat and vehicle seat

Abstract

The invention relates to a fitting (100; 100 ') for a vehicle seat (10). 200); 300); 400), which has a first fitting part (110; 210, 210; 310); 410), a second fitting part (120; 220; 320); 420) and an eccentric (150; 250, 250; 350); 450), which eccentrically pivots the first fitting part (and the second fitting part) relative to one another with respect to an eccentric distance (EX), in the event of an overload acting on the fitting, in particular in the event of an overload torque acting about an axis of rotation (A), the first fitting part (and the second fitting part) being eccentrically pivoted relative to one another with respect to the eccentric distance (EX). The first fitting part and the second fitting part can be coupled to each other by means of an eccentric (150; 250, 250; 350); 450) radially outward of the at least one support ring section (180; 280); 380; 380; 480) are radially supported against each other. The invention also relates to a vehicle seat (10), in particular for a motor vehicle, having at least one such fitting (100; 200); 300); 400) for a vehicle.

Description

Technical Field

[0001] The invention relates to an assembly for a vehicle seat, the assembly comprising a first assembly part, a second assembly part and an eccentric element for pivoting the first assembly part and the second assembly part on each other, the first assembly part having a toothed ring and the second assembly part having a gear wheel which is eccentrically arranged relative to the toothed ring about an eccentricity, the toothed ring and the gear wheel being meshingly engaged with each other, wherein the eccentric element can be rotated about an axis of rotation in order to drive a relative rolling contact movement of the gear wheel and the toothed ring. Background Art

[0002] WO 2012 / 110213 A1 discloses an assembly for a vehicle seat, the assembly comprising a first assembly part and a second assembly part, the first assembly part and the second assembly part being rotatable relative to each other and being gear-connected to each other via a gear ring and a gear meshing with the gear ring; and an eccentric, which is driven by a drive and rotates in a circumferential direction, for driving the gear and the gear ring to perform relative rolling contact movement. Summary of the invention

[0003] question

[0004] The problem addressed by the invention is to improve an assembly of the type mentioned in the introduction, in particular to increase the strength of the assembly. In particular, the toothed ring and the toothed wheel should not be able to disengage, not even partially, even under high loads. The problem addressed by the invention is also to provide a particularly safe vehicle seat.

[0005] Solution

[0006] According to the invention, this object is achieved by an assembly for a vehicle seat, the assembly comprising a first assembly part, a second assembly part and an eccentric, the eccentric enabling the first assembly part and the second assembly part to pivot eccentrically relative to each other about an eccentricity, the first assembly part having a toothed ring and the second assembly part having a gear, the toothed ring and the gear meshing with each other, wherein the eccentric can be rotated about an axis of rotation in order to drive the gear and the toothed ring for relative rolling contact movement, wherein at least one support ring segment rotating with the eccentric is radially arranged outside the eccentric, and in the event of an overload acting on the assembly, in particular in the event of an overload torque acting about the axis of rotation, the first assembly part and the second assembly part can be radially supported against each other by the at least one support ring segment.

[0007] Due to the fact that at least one supporting ring segment rotating with the eccentric is arranged radially on the outside of the eccentric, and in the event of an overload acting on the assembly, in particular in the event of an overload torque acting about the axis of rotation, the first assembly part and the second assembly part can be supported radially against each other by the at least one supporting ring segment, and the teeth of the gear and the gear ring remain in meshing up to very high loads, which increases the strength of the assembly.

[0008] Advantageous developments which can be used individually or in combination with one another are the subject matter of the dependent claims.

[0009] The eccentric can have two wedge segments and a driver segment. The eccentric can consist of two wedge segments and a driver segment. The eccentric can be arranged radially in an opening of one of the fitting parts. The eccentric can be arranged radially in an opening of the first fitting part. The eccentric can be arranged radially without play in the opening of the first fitting part. The eccentric can be arranged radially in an opening lined with a plain bearing bushing. The eccentric can be arranged radially without play in an opening lined with a plain bearing bushing.

[0010] At least one supporting ring segment can be connected to the driver segment via a connecting element. At least one supporting ring segment, the connecting element and the driver segment can be formed as a single piece. At least one supporting ring segment, the connecting element and the driver segment can be manufactured as a single piece. At least one supporting ring segment, the connecting element and the driver segment can be formed as a plurality of parts. At least one supporting ring segment, the connecting element and the driver segment can be manufactured as a plurality of parts. At least one supporting ring segment can be formed separately from the driver segment. At least one supporting ring segment is not a functional part of the eccentric, since the supporting ring segment only has a supporting effect when overloads act on the assembly part.

[0011] At least one supporting ring segment can be arranged diametrically opposite to the two wedge segments. Radially opposite particularly means that the center of gravity of the supporting ring segment (or the common center of gravity in the case of a plurality of supporting ring segments) is diametrically opposite to the common center of gravity of the wedge segments. Radially opposite is intended to include a tolerance range of up to + / - 45 degrees.

[0012] At least one support ring segment may have at least one first support surface for radially supporting at least one step of the first fitting part. The at least one step of the first fitting part may be formed circumferentially. The step of the first fitting part may be a drawn collar. The step may be annular. The step may be an axial step.

[0013] At least one support ring segment may have at least one second support surface for radially supporting at least one step of the second fitting part. The at least one step of the second fitting part may be formed circumferentially. The at least one step of the second fitting part may be a drawn collar. The at least one step may be annular. The at least one step may be an axial step.

[0014] The at least one spring can preload the at least one supporting ring segment, in particular radially, against a step of the second fitting part or against a step of the first fitting part.

[0015] The assembly can have two support ring segments. The two support ring segments can be preloaded against each other in the circumferential direction by a force storage device, in particular a compression spring and / or a tension spring. The two support ring segments can be preloaded against a stop of the driver segment by the force storage device.

[0016] At least one supporting ring segment can be connected to the driver segment of the eccentric by an annular connecting element. At least one supporting ring segment can be fastened to the connecting element, in particular clamped to the connecting element. The connecting element can have a force storage device, in particular at least one spring, for radially preloading the connecting element.

[0017] The problem is also solved by a vehicle seat according to the invention having at least one fitting according to the invention. The vehicle seat can have a seat part and a backrest. The backrest can be articulated to the seat part by at least one fitting according to the invention. Among other application options, the fitting can be used as a height adjuster, seat tilt adjuster, calf support tilt adjuster or shoulder support fitting.

[0018] In summary and in other words, the present invention provides a swing fitting with improved strength. The teeth of the gear and the gear ring are not only kept in meshing engagement by the eccentric, but also kept in meshing engagement by at least one support ring segment in addition. Therefore, at least one support ring segment provides a second support between the fitting parts. At least one support ring segment is preferably placed radially relative to the two wedge segments of the eccentric. The support ring segment can have a clearance at the outer diameter relative to the step portion of the second fitting part and / or a clearance at the inner diameter relative to the step portion of the first fitting part. After the initial deformation, the material of the support ring segment is used to continue to keep the teeth engaged. The support ring segment can be connected to the driver ring in a single piece to adjust the fitting (adjust the inclination of the backrest). Alternatively, the support ring segment can be connected to the driver ring in a form-fitting manner to adjust the fitting (adjust the inclination of the backrest) and can be driven by the driver ring. When using a two-part support ring segment, i.e., two support ring segments, the two support ring segments can be tangentially preloaded against the driver ring by at least one tension spring and / or at least one compression spring. At least one support ring segment can be fastened to a connecting element. The connecting element can be a carrier. At least one support ring segment can be mounted on the connecting element. At least one support ring segment can be clamped on the connecting element or insert molded with the material of the connecting element. The connecting element can be connected to the driver ring in a form-fitting manner and can be driven by the driver ring. A spring function that causes the connecting element to be preloaded in the radial direction can be integrated in the connecting element. Therefore, the inner diameter of the support ring segment can contact the step portion of the first assembly part with the toothed ring, and the outer diameter of the support ring segment can have a clearance relative to the step portion of the second assembly part with the gear. After the initial deformation of the tooth, the support ring segment is used to support so that the tooth continues to remain engaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The invention will be explained in more detail below based on advantageous exemplary embodiments shown in the drawings. However, the invention is not limited to these exemplary embodiments. In the drawings:

[0020] Figure 1 : shows a schematic side view of a vehicle seat according to the invention with a fitting according to the invention,

[0021] Figure 2 : shows along Figure 3 A cross-sectional view of a fitting according to a first exemplary embodiment of the present invention is shown in FIG. 1 through line II-II in FIG.

[0022] Figure 3 : shows along Figure 2 Line III-III passes through Figure 2 A cross-sectional view of an assembly in

[0023] Figure 4: shows along Figure 5.1 A cross-sectional view of a fitting according to a second exemplary embodiment of the present invention through line IV-IV in FIG.

[0024] Figure 5.1 : shows along Figure 4 The line V.1-V.1 passes through Figure 4 A cross-sectional view of an assembly in

[0025] Figure 5.2 : shows along Figure 4 The line V.2-V.2 passes through Figure 4 A cross-sectional view of an assembly in

[0026] Figure 6 : shows along Figure 7.1 A sectional view of a fitting according to a third exemplary embodiment of the present invention is shown through line VI-VI in FIG.

[0027] Figure 7.1 : shows along Figure 6 The line VII.1-VII.1 passes through Figure 6 A cross-sectional view of an assembly in

[0028] Figure 7.2 : shows along Figure 6 The line VII.2-VII.2 passes through Figure 6 A cross-sectional view of an assembly in

[0029] Figure 8 : shows along Fig. 9 A sectional view of a fitting according to a fourth exemplary embodiment of the present invention through line VIII-VIII in FIG.

[0030] Fig. 9 : shows along Figure 8 The line IX-IX passes through Figure 8 A cross-sectional view of an assembly in

[0031] Figure 10.1 :Shows the support ring segment installed in Figure 8 A perspective view of the connecting element of the assembly during

[0032] Figure 10.2 : Shows the support ring segment after being installed on the connecting element Figure 10.1 The corresponding perspective view.

[0033] Reference numerals list

[0034] 10 Vehicle seats

[0035] 12 Seat

[0036] 14 Backrest

[0037] 16 Handwheel

[0038] 18 Drive shaft

[0039] 100 Assemblies

[0040] 110 First assembly parts

[0041] 112 Gear Ring

[0042] 114 Receiving opening

[0043] 116 Sliding bearing bushing

[0044] 118 Steps

[0045] 120 Second assembly part

[0046] 122 Gear

[0047] 124 Shaft collars, drawn shaft collars

[0048] 126 Steps

[0049] 130 Buckle

[0050] 132 Edge Area

[0051] 150 Eccentric

[0052] 152 wedge segment

[0053] 154 Opening

[0054] 160 Driver

[0055] 162 Drive Hub

[0056] 164 Driver Ring

[0057] 166 Driver segment

[0058] 168 holes

[0059] 170 Cover Plate

[0060] 172 Sealing ring

[0061] 174 Circlip

[0062] 180 Support ring segment

[0063] 182 first support surface

[0064] 184, 184.1 Second support surface

[0065] 190 Connecting elements

[0066] 200 Assemblies

[0067] 210 First assembly parts

[0068] 212 Gear Ring

[0069] 216 Sliding bearing bushing

[0070] 218 Steps

[0071] 220 Second assembly part

[0072] 222 Gear

[0073] 224 Shaft collars, drawn shaft collars

[0074] 226 Steps

[0075] 226.1 Step

[0076] 230 Buckle

[0077] 250 Eccentric

[0078] 252 wedge segment

[0079] 260 Driver

[0080] 262 Drive Hub

[0081] 264 Driver Ring

[0082] 266 Driver Segment

[0083] 267 teeth

[0084] 274 Circlip

[0085] 280 Support ring segment

[0086] 282 first support surface

[0087] 284; 284.1 Second support surface

[0088] 284.1 Second support surface

[0089] 290 Connecting elements

[0090] 291 Finger

[0091] 295 Spring

[0092] 300 Assemblies

[0093] 310 First assembly parts

[0094] 312 Ring gear

[0095] 316 Sliding bearing bushing

[0096] 318 Steps

[0097] 320 Second assembly part

[0098] 322 Gear

[0099] 324 Shaft collars, drawn shaft collars

[0100] 326 Steps

[0101] 326.1 Step

[0102] 330 Buckle

[0103] 350 Eccentric

[0104] 352 wedge segment

[0105] 360 Drive

[0106] 362 Drive Hub

[0107] 364 Driver Ring

[0108] 366 Driver Segment

[0109] 367 Stopper

[0110] 374 Circlip

[0111] 380 Support ring segment

[0112] 382 first support surface

[0113] 384; 384.1 Second support surface

[0114] 384.1 Second support surface

[0115] 390 Connecting elements

[0116] 391 Finger

[0117] 395A (Compression) Spring

[0118] 395B (tension) spring

[0119] 400 Assemblies

[0120] 410 First Assembly Parts

[0121] 412 Ring Gear

[0122] 416 Sliding bearing bushing

[0123] 418 Steps

[0124] 420 Second assembly part

[0125] 422 Gear

[0126] 424 Collars, drawn collars

[0127] 426 Steps

[0128] 450 Eccentric

[0129] 452 wedge segment

[0130] 460 Driver

[0131] 462 Drive Hub

[0132] 464 Driver Ring

[0133] 466 Driver Segment

[0134] 480 Support ring segment

[0135] 482 First support surface

[0136] 484 Second support surface

[0137] 490 Connecting elements

[0138] 491 Finger

[0139] 492 Hook

[0140] 493 Spring arms, clips

[0141] 495 Spring

[0142] A Rotation axis

[0143] E Junction

[0144] E1 Extended Junction

[0145] EX eccentricity

[0146] S Clearance DETAILED DESCRIPTION

[0147] Figure 1 A vehicle seat 10 according to the invention for a motor vehicle is schematically shown, having a fitting 100 ; 200 ; 300 ; 400 according to the invention according to one of the exemplary embodiments described below.

[0148] The vehicle seat 10 has a seat part 12 and a backrest 14, which can be adjusted in its inclination relative to the seat part 12. To adjust the inclination of the backrest 14, a drive shaft 18 is rotated manually, for example by a hand wheel 16, or by a motor, for example an electric motor, the drive shaft of which is arranged horizontally in the transition area between the seat part 12 and the backrest 14. On both sides of the vehicle seat 10, the drive shaft 18 engages in a corresponding fitting 100; 200; 300; 400 for joint rotation.

[0149] The drive shaft 18 defines a rotation axis A. Position information and direction information used below, such as radial, axial and in the circumferential direction, refer to the rotation axis A of the drive shaft 18, unless otherwise stated. Radial means perpendicular to the rotation axis A. Axial means in the direction of the rotation axis A or parallel to the rotation axis A.

[0150] Figure 2 and Figure 3 A fitting 100 according to the invention for a vehicle seat 10 according to a first exemplary embodiment is shown.

[0151] The fitting 100 has a first fitting part 110 and a second fitting part 120, which can be rotated relative to each other around the axis of rotation A in a manner described in more detail below, wherein the oscillating motion is superimposed on the rotational motion. The two fitting parts 110 and 120 can each approximately describe a disc shape. The two fitting parts 110 and 120 are preferably composed of metal, particularly steel, which can be hardened at least in the region. In order to absorb axial forces, that is to say to keep the fitting parts 110 and 120 axially together, a retaining ring 130 is provided. The retaining ring 130 is preferably composed of metal, particularly steel, which is preferably not hardened. The retaining ring 130 preferably has a substantially flat annular shape.

[0152] The retaining ring 130 is fixedly connected to one of the two fitting parts 110, 120, in the present exemplary embodiment to the first fitting part 110. For this purpose, the radially outer edge portion of the retaining ring 130 is welded to the radially outer edge portion of the first fitting part 110. The circumferential edge region 132 facing radially inwards is used for the retaining ring 130 to engage on the radially outer side (i.e. the radially outer edge region of the other of the two fitting parts 110, 120) on the other of the two fitting parts 110, 120 that can be moved relative to each other (here the second fitting part 120) without interfering with the swinging relative rotational movement of the two fitting parts 110 and 120 relative to each other. The retaining ring 130 and the first fitting part 110 or the second fitting part 120 fixedly connected thereto thereby retain the other of the two fitting parts 110, 120 that can be moved relative to the retaining ring and the previous fitting part. In terms of structure, the two fitting parts 110 and 120 together with the retaining ring 130 form a disk-shaped unit.

[0153] In a modification of the first exemplary embodiment, an additional sliding ring may be provided between the snap ring 130 and the second fitting part 120 .

[0154] During installation of the vehicle seat 10, a first fitting part 110 of the fitting 100 is fixedly connected to the structure of the backrest 14 and a second fitting part 120 of the fitting 100 is fixedly connected to the structure of the seat part 12. However, the assignment of the fitting parts 110 and 120 can also be interchanged, i.e. the first fitting part 110 can alternatively be fixedly connected to the structure of the seat part 12 and the second fitting part 120 can be fixedly connected to the structure of the backrest 14. The fitting 100 is located in the force flux between the backrest 14 and the seat part 12.

[0155] The fitting 100 is designed as a gear fitting, wherein the first fitting part 110 and the second fitting part 120 are connected to each other via gears for adjustment and fixing, more precisely, via eccentric planetary gears which are self-locking in this case, as described in DE 101 44 840 A1. Therefore, the fitting 100 is an articulated fitting.

[0156] In order to construct the gears, an internally toothed ring gear 112 is formed on the first assembly part 110, and an externally toothed gear 122 is formed on the second assembly part 120, the ring gear and the gears meshing with each other. The diameter of the tip circle of the external teeth of the gear 122 is smaller than the diameter of the root circle of the internal teeth of the gear ring 112 by at least one tooth height. An appropriate difference of at least one tooth in the number of teeth of the gear 122 and the gear ring 112 allows the gear ring 112 to perform rolling contact motion on the gear 122. In this example, the gear 122 forms the radial outer edge of the second assembly part 120, that is, the second assembly part 120 ends with the gear 122 on the radial outer side.

[0157] One of the two fitting parts 110, 120, in this case the second fitting part 120, has a collar 124. The collar 124 is configured concentrically with the gear 122. The collar 124 can be formed as a drawn collar on the second fitting part 120 (i.e. formed as a single piece) or fastened to the second fitting part as a separate sleeve.

[0158] The two curved wedge segments 152 each have a curved inner surface and a curved outer surface. The two wedge segments 152 are supported on the collar 124 by the curved inner surface. The wedge segments 152 use the curved outer surface to pivot the other of the two fitting parts 110, 120, in this case the first fitting part 110. For this purpose, the receiving opening of the last-mentioned fitting part (in this case the receiving opening 114 of the first fitting part 110) is lined with a sliding bearing bushing 116, which is preferably pressed into place for co-rotation and the outer surfaces of the two wedge segments 152 are supported on the bushing. The terms "support" and "mounting" are not intended to be limited to a specific direction of the force flux through the fitting 100, because this direction depends specifically on the installation of the fitting 100 in the vehicle seat 10.

[0159] The respective first end of each wedge segment 152 has a surface extending generally in the radial direction, hereinafter referred to as the wide side. The end of each wedge segment 152 opposite to the wide side in the circumferential direction has a surface also extending generally in the radial direction, hereinafter referred to as the narrow side. The wide side is larger in the radial direction than the narrow side.

[0160] The wedge segments 152, whose broad sides face each other, each receive an angled end finger of a preloaded, for example Ω-shaped, spring, not shown in the figure, through a corresponding opening 154. The spring acts on the wedge segments 152 in the circumferential direction to push them apart, wherein the broad sides of the wedge segments 152 can contact and act on each other during adjustment of the fitting 100.

[0161] As mentioned above, the drive shaft 18 can be rotated around the rotation axis A to adjust the tilt angle of the backrest 14 around the rotation axis A. The driver 160 is used to transmit the rotational movement of the drive shaft 18 to the eccentric 150 having two wedge segments 152. The driver 160 has a driver hub 162 and a driver ring 164 connected to the driver hub 162 for common rotation. In this case, the driver 160 is formed by two parts by the driver hub 162 and the driver ring 164, which are separately formed parts, and the driver hub and the driver ring are connected to each other, especially connected in a form-fitting manner by plug-in teeth, so as to rotate together. The driver 160 is preferably made of plastic.

[0162] The driver ring 164 has a driver segment 166, which (with play when viewed in the circumferential direction) is arranged between the narrow sides of the wedge segments 152. The driver segment 166 is arranged directly adjacent to the narrow sides of the wedge segments 152 in the circumferential direction (except for the play that may be located therebetween), so that the driver segment 166 directly contacts one of the two wedge segments 152 by rotation of the driver 160 and directly drives the wedge segment 152. The driver segment 166 preferably has the shape of a hollow cylindrical segment. The driver segment 166 is arranged radially between the collar 124 and the plain bearing bushing 116.

[0163] The eccentric 150 is formed by two wedge-shaped segments 152 and a driver segment 166. The eccentric 150 has in this case an interrupted but substantially circular outer contour, which is offset by an eccentricity EX relative to the axis of rotation A. Due to the eccentricity EX, the eccentric 150 presses the teeth of the gear wheel 122 and the toothed ring 112 into each other to the greatest extent at the junction point E. The depth of the tooth engagement decreases in the circumferential direction on both sides of the junction point E. In the region radially opposite the junction point E, the teeth of the gear wheel 122 and the toothed ring 112 are completely disengaged and at the maximum possible distance from each other.

[0164] The driver hub 162 of the driver 160 is rotatably mounted in the collar 124 about the axis of rotation A. The driver hub 162 is centrally provided with a hole 168 for receiving the drive shaft 18. The profile of the hole 168 is designed to match the profile of the drive shaft 18, in this case a spline shaft profile. The driver hub 162 also has a cover disk 170 in the circumferential direction. The outer diameter of the cover disk 170 is larger than the inner diameter of the collar 124. On the outer side of the assembly part (in this case the first assembly part 110) with the sliding bearing bushing 116, a sealing ring 172, for example made of rubber or soft plastic, is arranged between its radial center area and the cover disk 170 and is connected, in particular clamped to the cover disk 170.

[0165] The driver 160 is axially fixed on the outside of the second fitting part 120 with the collar 124 by means of a preferably clip-on circlip 174. The circlip 174 extends in the axial direction along a portion of the driver hub 162, so that the driver hub 162 does not directly abut against the inside of the collar 124, but is mounted in the collar 124 (and thus the driver 160 is mounted on the second fitting part 120) by means of the insertion of the circlip 174.

[0166] During the drive by the drive shaft 18 rotating (repeatedly) about the rotation axis A, the torque is first transmitted to the driver 160 in a manner described in more detail below and then to the wedge segment 152 of the eccentric 150 via the driver segment 166. The eccentric 150 rotates relative to the two fitting parts 110, 120, resulting in a change in the direction of the eccentricity EX and thus a circumferential change in the junction point E, which leads to an oscillating rolling contact movement of the teeth of the toothed ring 112 and the gear wheel 122. As a result, the inclination of the backrest 14 can be infinitely variably adjusted between a plurality of use positions.

[0167] The maximum torque that the fitting 100 can transmit depends on the quality of the meshing engagement of the gear wheel 122 with the gear ring 112 in the region of the junction point E and in the adjacent regions on both sides, wherein the teeth of the gear wheel 122 and the gear ring 112 are at least partially still in meshing engagement. Under the load of the fitting 100, the wedge segments 152 prevent the distance between the plain bearing bushing 116 of the first fitting part 110 and the collar 124 of the second fitting part 120 from decreasing by absorbing radial forces and thus prevent the teeth of the gear wheel 122 and the gear ring 112 from moving away from each other, in particular in the region of the junction point E.

[0168] Since the driver segment 166 is arranged between the plain bearing bushing 116 and the collar 124, the driver segment 166 can only indirectly and to a limited extent reduce deformations of the fitting parts 110, 120 which occur radially outside the plain bearing bushing 116 and are detrimental to the meshing engagement between the gear wheel 122 and the gear ring 112. Therefore, an additional supporting ring segment 180 is provided.

[0169] The support ring segment 180 additionally reduces elastic and plastic deformations of the first fitting part 110 and / or the second fitting part 120, which, in the case of high loads on the fitting 100, can occur in the radially outer region of the plain bearing bushing 116 and adversely affect the meshing engagement of the teeth of the gear ring 112 and the gear wheel 122. For this purpose, the support ring segment 180 has a first, in particular cylindrical, support surface 182 for radially supporting a circumferential, in particular cylindrical, step 118 of the first fitting part 110. The step 118 is formed here by the circumferential radial outer surface of the collar 124. In addition, the support ring segment 180 has a second, in particular cylindrical, support surface 184 for radially supporting a circumferential, in particular cylindrical, step 126 of the second fitting part 120. The support ring segment 180 is a curved segment extending over an angle of less than 360 degrees, in particular less than 180 degrees. In this example, support ring segment 180 extends at the same obtuse angle as driver segment 166 .

[0170] In the event of an overload acting on the fitting 100, in particular in the event of an overload torque acting about the rotation axis A, the support ring segment 180 provides radial support between the second fitting part 120 and the gear wheel 122 of the first fitting part 110 and thus, in addition to the radial support of the driver segment 166, between the first fitting part 110 and the second fitting part 120. Thus, in the event of an overload, the meshing engagement between the gear ring 112 and the gear wheel 122 is maintained for a longer time, resulting in a higher maximum torque that can be transmitted, i.e., resulting in a higher strength of the fitting 100.

[0171] During normal operation of the fitting 100, there is a corresponding play S in the radial direction between the first support surface 182 and the step 118 of the first fitting part 110 and / or between the second support surface 184 and the step 126 of the second fitting part 120. The play S is produced due to the deformation of the elastic and / or plastic components in the event of an overload acting on the fitting 100. The play S enables the support ring segment 180 to rotate in a substantially frictionless manner when adjusting the fitting 100 during normal operation. After the play S in the event of an overload having been overcome, the support ring segment 180 can act in a supporting manner in the radial direction, as described above.

[0172] The support ring segment 180 is connected to the driver segment 166 for co-rotation via an in particular substantially flat connecting element 190. In the present case, the connecting element 190 is in the form of an annular disk segment, i.e. an open annular disk, which extends in the circumferential direction, in particular over the same angular range as the support ring segment 180. In the present case, the driver segment 166, the connecting element 190 and the support ring segment 180 are integrated as a single piece in the driver ring 164. During the mounting of the fitting 100, the driver ring 164 and the wedge segment 152 (and therefore the eccentric 150) are first arranged between the two fitting parts 110, 120 and the fitting parts 110, 120 are axially fixed relative to each other by the retaining ring 130. Only then is the drive hub 162 inserted into the driver ring 164 and axially fixed by the circlip 174.

[0173] Figure 4 , Figure 5.1 and Figure 5.2 A fitting 200 for a vehicle seat 10 according to a second exemplary embodiment of the invention is shown. Unless otherwise specified below, the fitting 200 corresponds in structure and function to the previously described fitting 100. Identical or equivalent components carry reference numerals which are 100 higher.

[0174] The eccentric 250 is formed by two wedge-shaped segments 252 and a driver segment 266. The eccentric 250 has an interrupted but substantially circular outer contour in this case, which is offset by an eccentricity EX relative to the axis of rotation A. The eccentric 250 presses the gear 222 of the second fitting part 220 and the toothed ring 212 of the first fitting part 210 into each other to the greatest extent at a junction E in the opposite direction of the eccentricity EX. The depth of the tooth engagement decreases in the circumferential direction on both sides of the junction E. Figure 4 In the figure, extended engagement regions E1 are shown respectively on the right and left sides of the engagement point E, in which the teeth of the gear 222 and the gear ring 212 are at least partially meshed and engaged and thus the strength is increased. In the region radially opposite to the engagement point E, the teeth of the gear 222 and the gear ring 212 are completely disengaged.

[0175] Other exemplary embodiments of fittings 100 , 300 also have corresponding extended engagement regions, but these are not labeled in the corresponding figures.

[0176] The support ring segment 280 additionally reduces elastic and plastic deformations of the first fitting part 210 and / or the second fitting part 220, in particular in the area of ​​the teeth of the toothed ring 212 and / or the gear wheel 222, which deformations occur under high loads in the radially outer area of ​​the plain bearing bushing 216. For this purpose, the support ring segment 280 has a first support surface 282 for radially supporting a circumferential step 218 of the first fitting part 210. The step 218 is formed here by the circumferential radial outer surface of the collar 224. In addition, the support ring segment 280 has two second support surfaces 284, 284.1 for radially supporting a corresponding step 226, 226.1 of the second fitting part 220.

[0177] The supporting ring segment 280 is a curved segment extending over an angle of less than 360 degrees, in particular less than 180 degrees.

[0178] In the event of an overload acting on the fitting 200, in particular in the event of an overload torque acting about the rotation axis A, the support ring segment 280 (as previously described in the first exemplary embodiment) provides radial support between the first fitting part 210 and the second fitting part 220 in addition to the driver segment 266. Thus, in the event of an overload, the meshing engagement between the toothed ring 212 and the toothed wheel 222 is maintained for a longer time, resulting in a greater maximum torque that can be transmitted, i.e. resulting in a higher strength of the fitting 200.

[0179] Between the first support surface 282 and the step 218 of the first fitting part 210 , during normal operation of the fitting 200 , there is a play S in radial direction, which is caused by elastic and / or plastic component deformations in the event of an overload acting on the fitting 200 .

[0180] The force storage device, in this case a spring 295, preloads the support ring segment 280 against the step 226 and / or the step 226.1, so that at least one of the two second support surfaces 284, 284.1 rests without play against the designated step 226 and / or the step 226.1. This avoids the formation of noise due to the radial relative movement between the support ring segment 280 and the fitting parts 210, 220.

[0181] The spring 295 is substantially C-shaped. Both end regions of the spring 295 are supported on the support ring segment 280, preferably in each case on the end face of one of the two end regions of the support ring segment 280. The central region of the spring 295 is supported on a circumferential step of the second fitting part 220, in the present case on the step 226, on which one of the two second support surfaces 284, 284.1 is also supported diametrically oppositely.

[0182] After the play S has been eliminated in the event of an overload, the supporting ring segment 280 (as described previously in the first exemplary embodiment) acts in a supporting manner between the two fitting parts 210 , 220 in the radial direction.

[0183] The support ring segment 280 is connected to the separately formed driver segment 266 of the driver ring 264 for common rotation via a connecting element 290. In the present case, the connecting element 290 and the support ring segment 280 are formed as a single piece. The support ring segment 280 is arranged radially outside the connecting element 290. In the present case, the connecting element 290 is in the form of an annular disk segment from which two fingers 291 protrude radially inside in the axial direction.

[0184] The two fingers 291 are spaced apart from each other in the circumferential direction and receive the driver segment 266 between them. The two fingers 291 form a toothing formed in the axial direction and into which the driver segment 266 is axially inserted as a mating toothing. The fingers 291 and the driver segment 266 mesh with each other so that the connecting element 290 (and therefore also the support ring segment 280) is connected to the driver segment 266 for common rotation.

[0185] The driver segment 266 is arranged directly between the fingers 291 in the circumferential direction (except for any play that may be located therebetween). Each of the two fingers 291 is arranged directly on the narrow side of one of the two wedge segments 252 in the circumferential direction (except for any play that may be located therebetween), and therefore, the driver segment 266 is in direct contact with one of the two fingers 291 by the rotation of the driver 260, and the finger 291 is in direct contact with one of the two wedge segments 252 and therefore drives the wedge segment 252.

[0186] The driver segment 266 and the two fingers 291 preferably each have the shape of a hollow cylindrical segment. The driver segment 266 and the two fingers 291 are arranged radially between the collar 224 and the plain bearing bushing 216 .

[0187] The separate configuration of the connecting element 290 / support ring segment 280 on the one hand, and the driver segment 266 on the other hand, means that during the installation of the fitting 200, the eccentric 250 with the two wedge segments 252 and the driver segment 266 can be assembled after the fitting parts 210, 220 have been axially fixed by the retaining ring 230 to form a pre-assembly with the support ring segment 280. Only then are the eccentric 250 and the driver hub 262 axially inserted into the pre-assembly and axially fixed by the circlip 274.

[0188] The fitting 200 of the second exemplary embodiment differs from the fitting 100 of the first exemplary embodiment described above, in particular in that the support ring segment 280 is formed separately from the driver ring 264 .

[0189] Figure 6 , Figure 7.1 and Figure 7.2 A fitting 300 for a vehicle seat 10 according to a third exemplary embodiment of the invention is shown. Unless otherwise specified below, the fitting 300 corresponds in structure and function to the previously described fitting 200. Identical or equivalent parts have reference numerals that are 100 higher than in the second exemplary embodiment.

[0190] In contrast to the fittings 100; 200 of the first two exemplary embodiments, each having exactly one support ring segment 180; 280, the fitting 300 of the third exemplary embodiment has two support ring segments 380. The two support ring segments 380 reduce elastic and plastic deformations of the first fitting part 310 and / or the second fitting part 320, in particular in the area of ​​the teeth of the toothed ring 312 and the gear 322, which deformations occur under high loads in the area of ​​the radially outer side of the sliding bearing bushing 316. For this purpose, the two support ring segments 380 each have a first support surface 382 for radially supporting a circumferential step 318 of the first fitting part 310. The step 318 is formed here by the circumferential radial outer side surface of the collar 324. In addition, the support ring segments 380 each have two second support surfaces 384, 384.1 for radially supporting a corresponding step 326, 326.1 of the second fitting part 320.

[0191] The two support ring segments 380 are curved segments, each extending at an angle less than 180 degrees. In this example, the support ring segments 380 each extend at an angle less than 90 degrees.

[0192] In the event of an overload acting on the fitting 300, in particular in the event of an overload torque acting about the rotation axis A, the two support ring segments 380, in addition to the driver segment 366, also provide radial support between the first fitting part 310 and the second fitting part 320 and therefore between the toothed ring 312 and the gear wheel 322. Thus, in the event of an overload, the meshing engagement between the toothed ring 312 and the gear wheel 322 is maintained for a longer time, resulting in a greater maximum torque that can be transmitted, i.e. resulting in a higher strength of the fitting 300.

[0193] During normal operation of the fitting 300, between the first support surface 382 and the step 318 of the first fitting part 310, respectively, and / or between the second support surface 384, 384.1 and the step 326, 326.1 of the second fitting part 320, respectively, there is in each case a play S in the radial direction, which play is produced due to deformation of the elastic and / or plastic parts in the event of an overload acting on the fitting 300. The play S enables the support ring segment 380 to rotate in a substantially frictionless manner when adjusting the fitting 300 during normal operation. After the play S in the event of an overload having been overcome, the support ring segment 380 can act in a supporting manner in the radial direction, as described above.

[0194] After the play S in the event of an overload having been overcome, the two supporting ring segments 380 can act in a supporting manner in the radial direction in the same way as in the above-described exemplary embodiment.

[0195] Each of the two support ring segments 380 is formed in one piece with one of the two connecting elements 390. The two connecting elements 390 of the support ring segment 380 are each preloaded in the circumferential direction against the driver segment 366 by at least one common force storage device, in this case a (compression) spring 395A and / or a (tension) spring 395B. The force storage device clamps the two connecting elements 390 together in the circumferential direction and against the driver segment 366 so that the respective connecting element 390 abuts against the driver segment 366 on both sides. This avoids the formation of noise due to relative movements between the connecting elements 390 and the driver segment 366.

[0196] The separate configuration of the connecting element 390 / support ring segment 380 on the one hand, and the driver segment 366 on the other hand, means that during the installation of the fitting 300, the eccentric 350 with the two wedge segments 352 and the driver segment 366 can be assembled after the fitting parts 310, 320 have been axially fixed by the retaining ring 330 to form a pre-assembly with the support ring segment 380. Only then are the rear eccentric 350 and the driver hub 362 axially inserted into the pre-assembly and axially fixed by the circlip 374.

[0197] The fitting 300 of the third exemplary embodiment differs from the previously described fittings 100 , 200 in particular in that two supporting ring segments 380 are provided.

[0198] Exactly one support ring segment 480 also has according to the fourth exemplary embodiment Figure 8 to Figure 10.2 The assembly 400 is shown in FIG. Unless otherwise specified below, the assembly 400 corresponds in structure and function to the assembly 200 of the second exemplary embodiment. Compared to the second exemplary embodiment, identical or equivalent components have reference numerals which are 200 greater.

[0199] The eccentric 450 is formed by two wedge-shaped segments 452 and a driver segment 466. The eccentric 450 has in the present case an interrupted but substantially circular outer contour which is offset by an eccentricity EX relative to the axis of rotation A. The eccentric 450 presses the gear wheel 422 of the second fitting part 420 and the toothed ring 412 of the first fitting part 410 maximally into one another at a junction point E in the direction opposite to the eccentricity EX.

[0200] The support ring segment 480 additionally reduces elastic and plastic deformations of the first fitting part 410 and / or the second fitting part 420, in particular in the region of the teeth of the toothed ring 412 and / or the toothed wheel 422, which deformations occur under high loads in the region radially outside the plain bearing bushing 416. For this purpose, the support ring segment 480 has a first support surface 482 for radially undersupporting the circumferential step 418 of the first fitting part 410. In addition, the support ring segment 480 has a second support surface 484 for radially supporting the step 426 of the second fitting part 420.

[0201] The supporting ring segment 480 is a curved segment extending over an angle less than 360 degrees, in particular, greater than 180 degrees.

[0202] In the event of an overload acting on the fitting 400, in particular in the event of an overload torque acting about the rotation axis A, in addition to the eccentric 450, the support ring segment 480 (as described in the previously described exemplary embodiment) also provides radial support between the first fitting part 410 and the second fitting part 420. Therefore, in the event of an overload, the meshing engagement between the toothed ring 412 and the toothed wheel 422 is maintained, resulting in a greater maximum torque that can be transmitted, i.e., resulting in a higher strength of the fitting 400.

[0203] During normal operation of the fitting 400, there is a radial play S in the radial direction between the second support surface 484 and the step 426 of the second fitting part 420, which is caused by deformation of the elastic and / or plastic parts in the event of an overload acting on the fitting 400. After overcoming the play S when the overload occurs, the support ring segment 480 acts in a supporting manner in the radial direction between the two fitting parts 410, 420.

[0204] The support ring segment 480 is connected to the driver segment 466 of the driver ring 464 via an annular connecting element 490 for co-rotation. In the present case, the connecting element 490 and the support ring segment 480 are separately formed parts. The connecting element 490 can be made of plastic. The support ring segment 480 can be made of metal, in particular sintered metal, or plastic. The support ring segment 480 protrudes radially beyond the connecting element 490. The support ring segment 480 is fastened to the connecting element 490. The support ring segment 480 is sickle-shaped.

[0205] The support ring segment 480 and the connecting member 490 are connected to each other by a clamp connection. Figure 10.1 and Figure 10.2 As shown, the connecting piece 490 has a hook 492 and two spring arms (clips) 493. During the installation of the support ring segment 480 on the connecting piece 490, the support ring segment 480 is first pushed under the hook 492 (see Figure 10.1 ) and then clamped by spring arm 493 (see Figure 10.2 ).

[0206] Two fingers 491 protrude radially inwardly in the axial direction from the connecting element 490. The two fingers 491 are spaced apart from each other in the circumferential direction and receive the driver segment 466 therebetween. The two fingers 491 form a toothing formed in the axial direction and into which the driver segment 466 is axially inserted as a mating toothing. The fingers 491 and the driver segment 466 mesh with each other in such a way that the connecting element 490 (and the support ring segment 480) are connected to the driver segment 466 for common rotation.

[0207] The driver segment 466 is arranged directly between the fingers 491 in the circumferential direction (except for the play optionally located therebetween). Each of the two fingers 491 is arranged directly on the narrow side of one of the two wedge segments 452 in the circumferential direction (except for the play optionally located therebetween), and therefore, the driver segment 466 directly contacts one of the two fingers 491 by the rotation of the driver 460 and the finger 491 directly contacts one of the two wedge segments 452 and thereby drives the wedge segment 452.

[0208] The driver segment 466 and the two fingers 491 preferably each have the shape of a hollow cylindrical segment. The driver segment 466 and the two fingers 491 are arranged radially between the collar 424 and the plain bearing bushing 416 .

[0209] The connecting element 490 also has a force storage device, in this case two springs 495. The two springs 495 are arranged radially opposite to the supporting ring segment 480. The two springs 495 are connected to the connecting element 490 as a single piece, in particular as a plastic injection molded component. The two springs 495 are designed as spring arms, which are supported on the first fitting part 410, in this case on the step 418 of the first fitting part 410. The supporting ring segment 480 is preloaded by the two springs 495 against the step 418 of the first fitting part 410, so that the first supporting surface 482 is supported against the designated step 418 without play. This avoids the formation of noise due to the radial relative movement between the supporting ring segment 480 and the fitting parts 410, 420.

[0210] The features disclosed in the above description, the claims and the drawings can be of significance for implementing the invention in its various embodiments either individually or in combination, provided that they remain within the scope of protection of the claims.

Claims

1. A fitting (100; 200; 300; 400) for a vehicle seat (10), the fitting (100; 200; 300; 400) comprising a first fitting part (110; 210; 310; 410), a second fitting part (120; 220; 320; 420) and an eccentric (150; 250; 350; 450) which allows the first fitting part (110; 210; 310; 410) and the second fitting part (120; 220; 320; 420) to be displaced from each other. 20; 320; 420) are pivoted eccentrically relative to each other about an eccentricity (EX), the first assembly part (110; 210; 310; 410) having a toothed ring (112; 212; 312; 412) and the second assembly part (120; 220; 320; 420) having a gear wheel (122; 222; 322; 422), the toothed ring (112; 212; 312; 412) and the gear wheel (122; 222; 322; 422) being in meshing engagement with each other, wherein In order to drive the relative rolling contact movement of the gear (122; 222; 322; 422) and the gear ring (112; 212; 312; 412), the eccentric (150; 250; 350; 450) is rotatable about a rotation axis (A), wherein at least one supporting ring segment (180; 280; 380; 480) rotating together with the eccentric (150; 250; 350; 450) is arranged on the eccentric (150; 250; 350; 450) 450), and in the event of an overload acting on the assembly (100; 200; 300; 400), in particular in the event of an overload torque acting about the rotation axis (A), the first assembly part (110; 210; 310; 410) and the second assembly part (120; 220; 320; 420) can be radially supported against each other by means of the at least one supporting ring segment (180; 280; 380; 480).

2. The assembly (100; 200; 300; 400) according to claim 1, wherein: The eccentric (150; 250; 350; 450) has two wedge segments (152; 252; 352; 452) and a driver segment (166; 266; 366; 466).

3. The assembly (100; 200; 300; 400) according to claim 2, wherein: The at least one support ring segment (180; 280; 380; 480) is connected to the driver segment (166; 266; 366; 466) via a connecting element (190; 290; 390; 490).

4. The assembly (100; 200; 300; 400) according to claim 2 or 3, wherein: The at least one supporting ring segment (180; 280; 380; 480) is arranged radially opposite to the two wedge segments (152; 252; 352; 452).

5. The assembly (100; 200; 300; 400) according to any one of claims 1 to 4, wherein: The at least one supporting ring segment (180; 280; 380; 480) has at least one first supporting surface (182; 282; 382; 482) for radially supporting at least one step (118; 218; 318; 418) of the first fitting part (110; 210; 310; 410).

6. The assembly (100; 200; 300; 400) according to claim 5, wherein: The at least one step (118; 218; 318; 418) of the first fitting part (110; 210; 310; 410) is formed circumferentially.

7. The assembly (100; 200; 300; 400) according to any one of claims 1 to 6, wherein: The at least one supporting ring segment (180; 280; 380; 480) has at least one second supporting surface (184; 284; 284.1; 384; 384.1; 484) for radially supporting at least one step (126; 226, 226.1; 326, 326.1; 426) of the second fitting part (120; 220; 320; 420).

8. The assembly (100; 200; 300; 400) according to claim 7, wherein: The at least one step (126; 226, 226.1; 326, 326.1; 426) of the second fitting part (120; 220; 320; 420) is formed circumferentially.

9. The assembly (200; 400) according to any one of claims 5 to 8, wherein: At least one spring (295; 495) preloads the at least one supporting ring segment (280; 480) against the step (226, 226.1) of the second fitting part (220) or against the step (418) of the first fitting part (410).

10. The assembly (200; 300; 400) according to any one of claims 2 to 7, wherein: The at least one support ring segment (280; 380; 480) is formed separately from the driver segment (266; 366; 466).

11. The assembly (300) according to any one of claims 1 to 10, wherein: Two supporting ring segments (380) are provided which are preloaded against each other in the circumferential direction by a force storage device, in particular here by a compression spring (395A) and / or a tension spring (395B), in particular each being preloaded against a stop (367) of the driver segment (366).

12. The assembly (400) according to any one of claims 1 to 10, wherein: The at least one supporting ring segment (480) is connected to the driver segment (466) of the eccentric (450) via an annular connecting element (490).

13. The assembly (400) of claim 12, wherein: The at least one supporting ring segment (480) is fastened to the connecting element (490), in particular clamped to the connecting element (490).

14. The assembly (400) according to claim 12 or 13, wherein: The connecting element (490) has a force storage arrangement, in particular at least one spring (495), for radially preloading the connecting element (490).

15. A vehicle seat (10), in particular for a motor vehicle, having at least one fitting (100; 200; 300; 400) according to any one of claims 1 to 14.

Images