Transmission accessory for vehicle seat and vehicle seat

Abstract

The present invention relates to a transmission accessory (100; 200; 300) for a vehicle seat (1), in particular a motor vehicle, the transmission accessory comprising a first toothed ring (116; 216; 316), a gear (118; 218; 318) meshing with the first toothed ring (116; 216; 316), another toothed ring (182; 282; 382) meshing with the gear (118; 218; 318), and a rotatable eccentric device for driving a relative rolling movement between the gear (118; 218; 318) and the first toothed ring (116; 216; 316), characterized in that a component is provided for ensuring that there is no gap between the gear (118; 218; 318) and the another toothed ring (182; 282; 382). The invention also relates to a vehicle seat (1) having a seat part (3) and a backrest (5), wherein the backrest (5) is articulated on the seat part (3) so as to be adjustable about a backrest pivot axis via at least one transmission accessory (100; 200; 300).

Description

Technical Field

[0001] The invention relates to a transmission accessory for a vehicle seat, in particular a motor vehicle, the transmission accessory comprising a first toothed ring, a gear meshing with the first toothed ring, another toothed ring meshing with the gear, and a rotatable eccentric device for driving a relative rolling movement between the gear and the first toothed ring. In addition, the invention also relates to a vehicle seat. Background Art

[0002] DE 103 05 407 B4 discloses a transmission accessory for a vehicle seat, which comprises a first hollow gear with an internal gear ring, a pinion driven by an eccentric device and meshing with the first hollow gear, and a second hollow gear with a second internal gear ring meshing with the pinion. The two hollow gears can rotate relative to each other around the same rotation axis, and the pinion performs an oscillating rotational motion relative to the hollow gear.

[0003] A transmission accessory for a vehicle seat disclosed in DE 10 2004 050 152 A1 comprises a first hollow gear, an eccentric device rotatable about an axis of rotation, a pinion driven by the eccentric device and meshing with the first hollow gear, and a second hollow gear meshing with the pinion, the second hollow gear being supported on the first hollow gear, wherein at least one wedging system is provided axially offset from the eccentric device with respect to the axis of rotation, the wedging system producing a clearance compensation effect between one of the two hollow gears and the other hollow gear and / or the pinion. The wedging system produces a clearance compensation effect between the second hollow gear and the first hollow gear and / or the pinion. The smaller of the two clearances is compensated by the wedging system, while the larger clearance is reduced by the same amount, but not completely compensated.

[0004] DE 10 2010 012 980 A1 discloses a transmission accessory for a vehicle seat, the transmission accessory having a first accessory part and a second accessory part, the two parts being in a transmission connection with each other by means of mutually meshing gears and toothed rings, and having a surrounding eccentric device driven by a follower for driving a relative rolling movement of the gears and toothed rings, wherein the first accessory part accommodates the eccentric device, which is supported on the second accessory part. The toothed ring is formed on the first accessory part. The gear is formed on the second accessory part. The rotating eccentric device for rolling movement between the gear and the toothed ring causes a swiveling movement between the two accessory parts. A full rotation of the eccentric device causes the accessory parts to rotate by a certain angle.

[0005] DE 10 2006 015 559 B3 discloses a transmission accessory having two individual accessories, in particular for a vehicle seat with an integrated safety belt (seat with integrated safety belt). The two individual accessories are arranged axially side by side and parallel to the force line and each have two accessory parts that can rotate relative to each other and are in driving connection with each other via an eccentric planetary gear mechanism, wherein the first individual accessory has an eccentric device without a play-free device and the second individual accessory has an eccentric device with a play-free device. Since the first individual accessory has an eccentric device without a play-free device and the second individual accessory has an eccentric device with a play-free device, the first individual accessory can be optimized with respect to efficiency and manufacturing costs when adjusting the accessories and the second individual accessory with respect to play-freeness when fixing the transmission accessory. Summary of the invention

[0006] The object of the present invention is to improve a transmission accessory of the type mentioned at the outset, in particular a backrest adjuster, in particular to provide an accessory with improved clearance compensation, such as that disclosed in DE 10 2004 050 152 A1, in which even larger clearances can be fully compensated. In addition, a corresponding vehicle seat is provided.

[0007] According to the invention, this object is solved by a transmission accessory for a vehicle seat, in particular a motor vehicle seat, having a first toothed ring, a gear meshing with the first toothed ring, a further toothed ring meshing with the gear, and a rotatable eccentric device for driving a relative rolling movement between the gear and the first toothed ring, characterized in that a component is provided for ensuring that there is no gap between the gear and the further toothed ring. The "further toothed ring" is understood to be a toothed ring formed separately from the first toothed ring, for example a second toothed ring.

[0008] By means of the component for ensuring that there is no gap between the gear and the other gear ring, the gap between the gear and the other gear ring can be fully compensated, whereby the transmission fitting has a smaller gap overall. The component for ensuring that there is no gap between the gear and the other gear ring can be supported on the gear and preloaded against the other gear ring. Alternatively, the device for ensuring that there is no gap between the gear and the other gear ring is supported on the other gear ring and preloaded against the gear.

[0009] In order to ensure that there is no gap between the gear and the other gear ring, the elastically preloaded component can preferably be preloaded in the radial direction. In order to ensure that there is no gap between the gear and the other gear ring, the elastically preloaded device can also be preloaded in the circumferential direction in addition or alternatively.

[0010] Preferably, the elastically preloadable component is elastically preloaded during the installation of the transmission accessory. In the installed state of the transmission accessory, the elastically preloadable device can be permanently elastically preloaded. Alternatively or additionally, the elastically preloadable device can be preloaded during the operation of the transmission accessory. The elastically preloadable component does not have to be composed of an elastic material, but can preferably be preloaded by a separately designed elastic element composed of an elastic material, for example spring steel or rubber.

[0011] The elastically preloaded device can be a disk. The disk that is elastically preloaded in the radial direction to ensure a gap-free state can act between the gear and the other gear ring. In addition, the radially outer region of the disk can protrude radially beyond the radially outer region of the gear.

[0012] A disk elastically preloaded in the circumferential direction for ensuring a clearance-free state can act between the gear and the other gear ring. For this purpose, the toothing of the disk can be designed accordingly to be different from the toothing of the gear. A disk elastically preloaded in the radial and circumferential direction for ensuring a clearance-free state can act between the gear and the other gear ring.

[0013] A "disk" is understood to be an object whose outer contour lies largely on a circle, which is defined by the tooth crests of the toothing. The disk can also be designed to be three-dimensional, in particular stepped. The inner contour of the disk can deviate from a circle, which is particularly useful if the disk is to ensure a play-free state in the circumferential direction.

[0014] The radially inner region of the disk can be supported on a step of the gear, particularly with at least one elastic element inserted therein. The inner contour of the disk can be different from a circle, which is particularly useful when the disk acts to ensure that there is no play in the circumferential direction.

[0015] The disk can be supported on a component connected to the gear, in particular on at least one pin connected to the gear, in particular with the interposition of at least one elastic element.

[0016] The disk can have a more flexible material on the radial inside than on the radial outside. The radially outer region of the disk can be made of metal, in particular steel. The radially inner region of the disk can be made of plastic or rubber.

[0017] The radially outer region of the disk protrudes radially beyond the radially outer region of the gear.

[0018] The disc may have a toothed portion on the radially outer side. The number of teeth of the toothed portion of the disc may be equal to the number of teeth of the other gear ring. The toothed portion of the disc may mesh with the other gear ring.

[0019] The radially inner region of the disk can be supported on a step of the gear. The step can be circumferential. The step can be cylindrical. The step can have a shape different from a cylindrical shape in a circumferential manner, in particular in order to be able to preload the disk in the circumferential direction. The step can have a wavy shape in a circumferential manner. The step can have a polygonal shape in a circumferential manner.

[0020] In the relaxed state of the disk, a radially outer region of the disk may protrude radially beyond a radially outer region of the gear.

[0021] The disk may have a toothing that meshes with the toothing of another gear ring. The disk may have a toothing on the radially outer side that meshes with the toothing of another gear ring. The tooth tip circle radius of the disk's toothing may be greater than the tooth tip circle radius of the gear's toothing. Therefore, the disk's tooth tip may protrude beyond the gear's tooth tip. The tooth thickness of the disk's toothing is preferably greater than the tooth thickness of the gear's toothing. The tooth thickness is the length of the arc segment between the tooth surfaces of a tooth on a certain diameter, in particular on the pitch circle diameter.

[0022] In an alternative embodiment, the disk is supported on another toothed ring and is preloaded in the direction of the gear. The tip circle radius of the (inner) toothing of the disk is then preferably smaller than the tip circle radius of the toothing of the gear. The "disk" protruding from the toothing is then fixed to the toothed ring in an elastically preloaded manner and protrudes radially inward relative to the toothing of the toothed ring.

[0023] The toothed portion of the disk can be deflected relative to the toothed portion of the gear in the circumferential direction. Therefore, clearance compensation in the circumferential direction can be achieved. Preferably, one of the two tooth surfaces of each tooth of the toothed portion of the disk is flush with the corresponding tooth surface of a tooth of the gear toothed portion in the axial direction.

[0024] The transmission fitting can be a so-called double fitting having a first individual fitting and a second individual fitting, which are arranged axially side by side and parallel to the force line, wherein the first individual fitting has a first fitting part and a second fitting part, which are in driving connection with each other via a first toothed ring and a first gear wheel meshing with each other, and have a first eccentric for driving a relative rolling movement between the first gear wheel and the first toothed ring, wherein the first eccentric produces a first eccentricity between the first gear wheel and the first toothed ring, and the second individual fitting has a third fitting part and a fourth fitting part, which are in driving connection with each other via a second toothed ring and a second gear wheel meshing with each other, and have a second eccentric for driving a relative rolling movement between the second gear wheel and the second toothed ring, wherein the second eccentric produces a second eccentricity between the second gear wheel and the second toothed ring. Preferably, the transmission fitting is characterized by a part for ensuring a clearance between the first gear wheel and the third toothed ring of the output element, in particular a disk that can be elastically preloaded in the radial direction, and / or by a part for ensuring a clearance between the second gear wheel and the third toothed ring of the output element, in particular a disk that can be elastically preloaded in the radial direction.

[0025] The gap between the first gear and the third gear ring and / or the gap between the second gear and the third gear ring is reduced or eliminated by a component for ensuring that there is no gap between the first gear and the third gear ring of the output component, in particular a disc that can be elastically preloaded in the radial direction, and / or by a component for ensuring that there is no gap between the second gear and the third gear ring, in particular a disc that can be elastically preloaded in the radial direction.

[0026] Preferably, either two gears or two ring gears (on the one hand) and the output component (on the other hand) are each capable of limited relative movement in the radial direction and are kinematically coupled to each other in the circumferential direction, and the transmission accessory according to the invention can then have a non-swinging output component as an interface with the vehicle structure.

[0027] Either two gears or two toothed rings are connected to the output element in such a way that they can each move to a limited extent in the radial direction and are kinematically coupled in the circumferential direction. The respective other pair of gears or toothed rings is preferably connected via at least one adapter. The adapter can be connectable to the structure of the seat part and the output element can be connectable to the structure of the backrest. The output element can have a radially protruding fastening flange, in particular for connection to the structure of the backrest.

[0028] Preferably, a first toothed ring is formed on the first fitting part, a first gear wheel is formed on the second fitting part, a second toothed ring is formed on the third fitting part, and a second gear wheel is formed on the fourth fitting part.

[0029] The first and third fitting parts can be connected at least in a non-rotatable manner or can be connected in a non-rotatable manner, in particular fixedly, for example connected to each other via an adapter. The second and fourth fitting parts can each be connected to the output part in a manner that can be limitedly moved radially and kinematically coupled circumferentially.

[0030] The output component has a third gear ring, in which the first gear and the second gear roll. The output component can form a transmission stage together with the first gear. The output component can form a transmission stage together with the second gear.

[0031] The first eccentricity of the first individual accessory can be arranged to be rotated in the circumferential direction by a specified angle relative to the second eccentricity of the second individual accessory. The angle can be greater than 45 degrees. The angle can be greater than 90 degrees. The size of the angle can be between 150 and 210 degrees. The size of the angle is preferably 180 degrees. In the case of an angle of 180, the variation of the torque demand can be completely eliminated to a large extent. By arranging the first eccentricity of the first individual accessory to be deflected in the circumferential direction relative to the second eccentricity of the second individual accessory, the torque demand is more stable, that is to say the variation is smaller.

[0032] The number of teeth of the first gear is preferably equal to the number of teeth of the second gear. The number of teeth of the first gear ring is preferably equal to the number of teeth of the second gear ring.

[0033] The component for ensuring a lack of play acts between the first gear and the toothed ring of the output component. The component for ensuring a lack of play can be a disk. The component for ensuring a lack of play can be in the form of an annular disk. The component for ensuring a lack of play can be a disk that can be elastically preloaded in the radial direction. The disk can have a toothed portion, in particular for meshing with the toothed ring of the output component. The disk can be partially made of steel. The disk can be partially made of plastic. The disk can be partially made of rubber.

[0034] Alternatively or additionally, a component for ensuring that there is no gap between the second gear and the toothed ring of the output member may be provided. The component for ensuring that there is no gap may be a disc. The component for ensuring that there is no gap may be in the form of an annular disc. The component for ensuring that there is no gap may be a disc that can be elastically preloaded in the radial direction. The disc may have a toothed portion, in particular for meshing with the toothed ring of the output member. The disc may be partially made of steel. The disc may be partially made of plastic. The disc may be partially made of rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The invention is described in detail below with the aid of three advantageous embodiments shown in the accompanying drawings. However, the invention is not limited to these embodiments. In the accompanying drawings:

[0036] Figure 1shows a schematic side view of a vehicle seat with a transmission accessory according to the invention,

[0037] Figure 2 A sectional view partially showing a transmission accessory according to the invention according to a first embodiment,

[0038] Figure 3 Shown along Figure 2 The section along the cutting line III-III in

[0039] Figure 4 shows a perspective exploded view of a transmission accessory according to the present invention according to a second embodiment,

[0040] Figure 5 Shows Figure 4 Another three-dimensional exploded view of the transmission accessories,

[0041] Figure 6 Partially shown Figure 4 A three-dimensional diagram of the gear and disc teeth of the transmission accessories,

[0042] Figure 7 Shows Figure 4 A three-dimensional view of a transmission accessory, wherein the third accessory component and the clamping ring are removed,

[0043] Figure 8 Shows Figure 4 Another perspective view of the transmission accessory, wherein the clamping ring is removed,

[0044] Fig. 9 Shows Figure 4 The cross section of the transmission parts,

[0045] Fig.10 shows a perspective exploded view of a transmission accessory according to the present invention according to a third embodiment,

[0046] Fig.11 Partially shown Fig.10 A three-dimensional diagram of the gear and disc teeth of the transmission accessories,

[0047] Fig.12 Shows Fig.10 A perspective view of a transmission accessory of , wherein the third accessory component and the clamping ring are removed, and

[0048] Fig.13 Shows Fig.10 Cross-section of a transmission accessory with the clamping ring removed. DETAILED DESCRIPTION

[0049] exist Figure 1The vehicle seat 1 for a motor vehicle shown in the figure has a seat part 3 and a backrest 5 whose inclination is adjustable relative to the seat part 3. In order to adjust the inclination of the backrest 5, the shaft 7 is rotated, for example manually via a hand wheel 9, or electrically, for example via an electric motor. The shaft 7 is arranged horizontally in the transition area between the seat part 3 and the backrest 5. On both sides of the vehicle seat 1, the shaft 7 is respectively engaged in a fitting in a rotationally fixed manner, wherein at least one fitting is designed as a transmission fitting 100 according to the invention. The shaft 7 and the at least one transmission fitting 100 according to the invention are components of a fitting system for adjusting the inclination of the backrest 5.

[0050] The axis 7 defines the orientation parameters of a cylindrical coordinate system used, the origin of which is located at the center of the axis 7. In particular, the terms "radial", "axial", "circumferential" and "circumferential" all refer to this cylindrical coordinate system.

[0051] Figure 2 and Figure 3 A transmission accessory 100 according to the invention is shown according to a first embodiment. Figure 2 A section is partially shown of a transmission accessory 100. In particular, the transmission accessory 100 differs from the prior art in the added components for ensuring freedom from play.

[0052] The transmission accessory 100 has a first individual accessory 110 and a second individual accessory 150, which are arranged adjacent to each other in the axial direction. The rotation of the shaft 7 causes the two individual accessories 110; 150 to be adjusted synchronously.

[0053] The first individual fitting 110 has a first fitting part 112 and a second fitting part 114. A toothed ring 116 is formed on the first fitting part 112, which is referred to below as the first toothed ring 116. A gear wheel 118 is formed on the second fitting part 114, which is referred to below as the first gear wheel 118.

[0054] The first individual fitting 110 is designed as a transmission fitting in which a first fitting part 112 and a second fitting part 114 are connected to each other via a transmission for adjustment and fixing, more precisely via an eccentric planetary gear mechanism such as described in DE 10 2010 012 980 A1 (here self-locking), the disclosure of which is expressly incorporated herein. A first ring gear 116 of the first fitting part 112 and a first gear wheel 118 of the second fitting part 114 are components of the eccentric planetary gear mechanism.

[0055] The first gear ring 116 of the first fitting part 112 and the first gear 118 of the second fitting part 114 mesh with each other, that is, partially mesh. The diameter of the tip circle of the toothed portion 120 of the first gear 118 designed as an external tooth is smaller than the diameter of the root circle of the toothed portion 117 of the first gear ring 116 designed as an internal tooth by at least one tooth height. The difference in the number of teeth of at least one tooth of the first gear 118 and the first gear ring 116 enables the first gear ring 116 to perform a oscillating rolling motion on the first gear 118.

[0056] The second fitting part 114 has a flange 122. Two arcuate wedges with curved inner surfaces are supported on the flange, which support the first fitting part 112 with their curved outer surfaces and with the interposition of a sliding bearing bushing 124. The first follower 126, which can be driven by the shaft 7, has two follower arcuate wedges 128 that are inserted with clearance between the narrow sides of the arcuate wedges and are radially floatingly supported on the flange 122. The wide sides of the arcuate wedges that are close to each other are each equipped with an end finger of a spring, which forces the arcuate wedges apart in the circumferential direction, so that the wedge-shaped geometry of the arcuate wedges forces the first gear 118 to mesh with the first toothed ring 116 and reduces the clearance in the meshing area between the first toothed ring 116 and the first gear 118.

[0057] The arched wedge and the spring form a first eccentric device, which presses the first gear 118 on the meshing point with the first gear ring 116 in the extension of the direction of the first eccentricity 1E1. When the shaft 7 is driven, that is, when the shaft 7 rotates around its rotation axis (especially for a plurality of revolutions), the torque is transmitted from the shaft 7 to the first follower 126 and to the first eccentric device via the follower arch 128, and the first eccentric device slides along the sliding bearing bushing 124 under the condition of being offset in the direction of the first eccentricity 1E1. The first eccentricity 1E1 thus moves in a circular motion, thereby causing the meshing point between the first gear 118 and the first gear ring 116 to be offset in a circular motion, which presents a kind of oscillating rolling motion, that is, a relative motion between the first gear 118 and the first gear ring 116 with an overlapping oscillating motion.

[0058] A full rotation of the first eccentric device causes a relative rotation of a small angle between the first fitting part 112 and the second fitting part 114. Due to the rotation of the first eccentric device, the lever arm and the support point in the first individual fitting 110 change, thereby generating a sinusoidally changing torque requirement for driving the first individual fitting 110.

[0059] The second individual fitting 150 has a third fitting part 152 and a fourth fitting part 154. A toothed ring 156, hereinafter referred to as the second toothed ring 156, is formed on the third fitting part 152. A gear wheel 158, hereinafter referred to as the second gear wheel 158, is formed on the fourth fitting part 154.

[0060] The consecutive numbering of the references to the components of the second individual accessory 150 (and the first individual accessory 110), such as the "third" accessory part 152 and the "second" gear wheel 158, refers to the entire transmission accessory 100, not to the individual accessories 110; 150. Thus, for example, the second individual accessory 150 has exactly one gear wheel, namely the second gear wheel 158 (of the total of two gear wheels 118; 158 of the transmission accessory 100).

[0061] The second individual accessory 150 is designed as a transmission accessory like the first individual accessory 110 , in which the third accessory part 152 and the fourth accessory part 154 are connected to each other via a self-locking eccentric planetary gear mechanism. The second individual accessory 150 is identical to the first individual accessory 110 in terms of structure and function.

[0062] The fourth accessory part 154 has a flange 160. Two arcuate wedges 162 are supported on the flange 160, which support the third accessory part 152. The arcuate wedges 162 and the spring 170 form a second eccentric device 172, which presses the second gear 158 on the meshing point with the second gear ring 156 on the extension line in the direction of the second eccentricity 1E2 and reduces the gap in the meshing area between the second gear ring 156 and the second gear 158.

[0063] When the shaft 7 is driven, i.e., when the shaft 7 rotates around its axis of rotation (in particular, for multiple turns), the torque is first transmitted to the second follower 166 and then to the second eccentric 172 via the second follower bow of the second follower 166, which slides along the sliding bearing bushing 164 under the condition of being offset in the direction of the second eccentric 1E2. The second eccentric 1E2 thus moves in a circular motion, thereby causing the meshing point between the second gear 158 and the second gear ring 156 to be offset in a circular motion, which presents a kind of oscillating rolling motion, i.e., a relative motion between the second gear 158 and the second gear ring 156 with an overlapping oscillating motion.

[0064] A full rotation of the second eccentric device 172 causes a relative rotation of a certain angle between the third accessory part 152 and the fourth accessory part 154. Due to the rotation of the second eccentric device 172, the lever arm and the support point in the second individual accessory 150 change, thereby generating a sinusoidally changing torque requirement for driving the second individual accessory 150.

[0065] The first eccentricity 1E1 of the first individual accessory 110 is arranged to be offset in the circumferential direction relative to the second eccentricity 1E2 of the second individual accessory 150. Here, the angle between the first eccentricity 1E1 of the first individual accessory 110 and the second eccentricity 1E2 of the second individual accessory 150 is exactly 180 degrees. Therefore, a 180-degree phase shift occurs between the torque requirement for driving the first individual accessory 110 and the torque requirement for driving the second individual accessory 150. Therefore, the two sinusoidal torque requirements are superimposed on each other to form an approximately constant and linear course of the total torque requirement for adjusting the transmission accessory 100.

[0066] The first fitting part 112 of the first individual fitting 110 and the third fitting part 152 of the second individual fitting 150 are connected or connectable to one another via at least one adapter. Via the at least one adapter, the transmission fitting 100 can be connected to a component of the vehicle seat 1 , preferably a component of the seat part 3 .

[0067] The second fitting part 114 of the first individual fitting 110 and the fourth fitting part 154 of the second individual fitting 150 are kinematically coupled to the same output component 180 via a transmission ratio. Here, the second fitting part 114 and the fourth fitting part 154 are each limitedly movable relative to each other in the radial direction and are kinematically coupled to each other via the output component 180 in the circumferential direction.

[0068] The first gear 118 and the second gear 158 are partially meshed with the ring gear 182 (hereinafter referred to as the third ring gear 182) of the output member 180. The diameter of the addendum circle of the toothed portion of the first gear 118 and the second gear 158 is respectively smaller than the diameter of the root circle of the toothed portion 184 of the third ring gear 182 designed as an internal tooth by at least one tooth height. The respective difference in the number of teeth of at least one tooth of the first gear 118 and the second gear 158 (on one side) and the third ring gear 182 (on the other side) enables the first gear 118 and the second gear 158 to perform a swinging rolling motion in the third ring gear 182. Therefore, the first gear 118 and the second gear 158 are kinematically coupled to the output member 180 in the circumferential direction.

[0069] The number of teeth of the two gear wheels 118 , 158 is the same. The number of teeth of the third gear ring 182 and the number of teeth of the two gear wheels 118 , 158 together with the number of teeth of the two gear rings 116 , 156 define the transmission ratio.

[0070] The third toothed ring 182 and thus the output component 180 can be driven by the rolling movement of the first gear wheel 118 and the second gear wheel 158 in the third toothed ring 182. Due to the previously described relative rotation of the second fitting part 114 and the fourth fitting part 154, each with overlapping oscillating movements, and the previously described phase shift of the eccentricities 1E1, 1E2, although the second fitting part 114 and the fourth fitting part 154 rotate synchronously, the overlapping oscillating movements are anti-periodic and compensated by the output component 180. The previously described floating bearing of the two followers 126, 166 in the flanges 120, 160 ensures a synchronous drive of the two eccentrics and thus the rolling movement of the first gear wheel 118 and the second gear wheel 158 in the third toothed ring 182. The two followers 126, 166 are fixedly connected to each other here, in particular clamped to each other.

[0071] The first fitting part 112 and the third fitting part 152 can be supported on the output part 180, in particular with a sliding bearing ring inserted in between. The first individual fitting 110, the second individual fitting 150 and the output part 180 are fixed relative to each other in the axial direction by a clamping ring 185.

[0072] The output element 180 here has a radially protruding fastening flange which can be connected to a component of the vehicle seat 1 , preferably a component of the backrest 5 .

[0073] The gear fitting 100 has a disk 140 which is elastically preloaded in the radial direction as a component for ensuring that there is no play between the first gear 118 and the third gear ring 182, which component is referred to as the first disk 140 below. The radially outer region of the first disk 140 is in contact with the third gear ring 182. The first disk 140 is designed to mesh radially outwardly preferably in the following manner: the first disk 140 meshes with the third gear ring 182 radially outwardly and in the region where the first gear 118 also meshes with the third gear ring 182 in the circumferential direction. On the radial inner side, the disk 140 has an elastic annular spring element 144, which is made of an elastic material, such as rubber. The spring element 144 is supported on a circumferential step 119 in the first gear 118 and preloads the disk 140 in the direction of meshing with the third gear ring 182, thereby reducing or eliminating the play between the first gear 118 and the third gear ring 182 in the meshing region.

[0074] The gear fitting 100 has a disk 190 which is elastically preloaded in the radial direction as a component for ensuring that there is no play between the second gear 158 and the third gear ring 182, and is referred to as the second disk 190 below. The radially outer region of the second disk 190 abuts against the third gear ring 182. The second disk 190 is designed to mesh radially outwardly preferably in the following manner: the second disk 190 meshes with the third gear ring 182 radially outwardly and in the circumferential region in which the second gear 158 also meshes with the third gear ring 182. On the radial inner side, the disk 190 has an elastic annular spring element 194 which is made of an elastic material, such as rubber. The spring element 194 is supported on a circumferential step 159 in the second gear 158 and preloads the second disk 190 in the direction of meshing with the third gear ring 182, thereby reducing or eliminating the play between the second gear 158 and the third gear ring 182 in the meshing region.

[0075] In the two exemplary embodiments described below, the second individual component part is omitted, so that the transmission component part 200 , 300 has exactly two toothed rings 216 , 282 ; 316 , 382 and exactly one gear wheel 218 ; 318 .

[0076] exist Figures 4 to 9 2 shows a transmission accessory 200 according to the invention according to a second embodiment.

[0077] The gear fitting 200 has a first fitting part 212 and a second fitting part 214 . A toothed ring 216 , which is referred to below as first toothed ring 216 , is formed on the first fitting part 212 . The second fitting part 214 is designed as a gear wheel 218 .

[0078] The first accessory part 212 and the second accessory part 214 are connected to each other via a transmission for adjustment and fixing, more precisely via an eccentric planetary gear mechanism, which is self-locking here, as described, for example, in DE 10 2010 012 980 A1, the disclosure of which is expressly incorporated herein. The first ring gear 216 of the first accessory part 212 and the gear 218 of the second accessory part 214 are components of the eccentric planetary gear mechanism.

[0079] The first gear ring 216 of the first fitting part 212 and the gear 218 of the second fitting part 214 mesh with each other, that is, partially mesh. The diameter of the tip circle of the toothed portion 220 of the gear 218 designed as an external tooth is smaller than the diameter of the root circle of the toothed portion 217 of the first gear ring 216 designed as an internal tooth by at least one tooth height. The respective difference in the number of teeth of at least one tooth of the gear 218 and the first gear ring 216 enables the first gear ring 216 to perform a oscillating rolling motion on the gear 218.

[0080] The second fitting part 214 has a flange 222. Two arcuate wedges 230 with curved inner surfaces are supported on the flange, which support the first fitting part 212 with their curved outer surfaces and with the interposition of a sliding bearing bushing 224. The first follower 226, which can be driven by the shaft 7, has two follower arcuate elements 228 that are inserted with clearance between the narrow sides of the arcuate wedges 230. The follower 226 is fixed in the axial direction by an axial securing element 229, which is clamped on the cylindrical part of the follower 226. The shaft 7 can be inserted into the cylindrical part of the follower 226 in a rotationally fixed manner. A cover plate, not shown in the drawing, is provided between the axial securing element 229 and the third fitting part 281.

[0081] An end finger of a spring 232 is respectively installed on the wide sides of the arched wedge 230 that are close to each other, and the end finger forces the arched wedge 230 to separate circumferentially, thereby forcing the gear 218 to engage with the ring gear 216 through the wedge-shaped geometry of the arched wedge 230 and reducing the gap in the meshing area between the first ring gear 216 and the gear 218.

[0082] The arched wedge 230 and the spring 232 form an eccentric device, which presses the gear 218 on the meshing point with the first toothed ring 216 in the extension of the direction of the eccentricity 2E. When the shaft 7 is driven, that is, the shaft 7 rotates about its rotation axis (in particular for a plurality of revolutions), the torque is transmitted from the shaft 7 to the first follower 226 and via the follower arch 228 to the first eccentric device, which slides along the sliding bearing bushing 224 under the condition of being offset in the direction of the eccentricity 2E. The eccentricity 2E thus moves in a circular motion, thereby causing the meshing point between the gear 218 and the first toothed ring 216 to be offset in a circular motion, which presents a wobbling rolling motion, that is, a relative rotation between the gear 218 and the first toothed ring 216 with an overlapping wobbling motion. A full rotation of the first eccentric device causes a relative rotation of the first fitting part 212 and the second fitting part 214 by a certain angle.

[0083] The gear 218 is partially meshed with another, that is, in this case, a second ring gear 282 formed on a third accessory part 281 used as an output member. The diameter of the tip circle of the toothed portion 220 of the gear 218 is smaller than the diameter of the root circle of the toothed portion 284 designed as an internal tooth of the other ring gear 282 by at least one tooth height. The respective difference in the number of teeth of at least one tooth of the gear 218 and the other ring gear 282 enables the gear 218 to perform a oscillating rolling motion in the other ring gear 282.

[0084] The number of teeth of the further ring gear 282 and the number of teeth of the gear wheel 218 together with the number of teeth of the first ring gear 216 define a transmission ratio.

[0085] The third fitting part 281 and the first fitting part 212 are fixed relative to each other axially and radially by a clamping ring 285. Preferably, the cylindrical section is butt-welded to the outer region of the first fitting part 212. The third fitting part 281 is rotatably mounted and axially fixed in the clamping ring 285.

[0086] The third fitting part 281 can have a fastening flange (not shown in the figures), in particular a radially protruding fastening flange, which can be connected to a structural component of the vehicle seat 1 , preferably a structural component of the backrest 5 .

[0087] The transmission accessory 200 has a disk 240 which is elastically preloaded in the radial direction as a component for ensuring that there is no play between the gear 218 and the other gear ring 282. The disk 240 meshes with the other gear ring 282. For this purpose, the disk 240 has a toothing 242 on the radial outside which meshes with the other gear ring 282 and in the circumferential direction in the region where the gear 218 also meshes with the other gear ring 282.

[0088] On the radial inner side, the disk 240 is supported on the circumferential step 219 of the gear 218 with an elastic annular elastic element 244 inserted therein, the elastic element being made of an elastic material, such as rubber. The elastic element 244 is supported on the circumferential step 219 on the gear 218 and preloads the disk 240 in the direction of meshing with the other gear ring 282, thereby reducing or eliminating the gap between the gear 218 and the other gear ring 282 in the meshing area.

[0089] As especially Figure 6 As can be seen in the figure, in the relaxed state of the disk 240, the radial outer area of ​​the tooth portion 242 of the disk 240 radially protrudes beyond the radial outer area of ​​the tooth portion 220 of the gear 218. The tooth tip circle radius of the tooth portion 242 of the disk 240 is greater than the tooth tip circle radius of the tooth portion 220 of the gear 218. Therefore, the disk 240 can compensate for the gap between the gear 218 and the other gear ring 282 in the radial direction.

[0090] The tooth thickness of the toothed portion 242 of the disk 240 is greater than the tooth thickness of the toothed portion 220 of the gear 218. Therefore, the disk 240 can also compensate for the gap between the gear 218 and the other gear ring 282 in the circumferential direction.

[0091] Figures 10 to 13 A transmission accessory 300 according to the invention is shown according to a third embodiment. The transmission accessory 300 corresponds in its structure and its function to the transmission accessory 200 described above, unless otherwise described below.

[0092] The gear fitting 300 has a first fitting part 312 and a second fitting part 314. A toothed ring 316 is formed on the first fitting part 312, which is referred to below as the first toothed ring 316. The second fitting part 314 has a gear wheel 318. The second fitting part 314 is designed as a gear wheel 318 here.

[0093] The first gear ring 316 of the first accessory part 312 and the gear 318 of the second accessory part 314 mesh with each other, that is, partially mesh. The diameter of the tip circle of the toothed portion 320 of the gear 318 designed as an external tooth is smaller than the diameter of the root circle of the toothed portion 317 of the first gear ring 316 designed as an internal tooth by at least one tooth height. The corresponding difference in the number of teeth of at least one tooth of the gear 318 and the first gear ring 316 enables the first gear ring 316 to perform a swinging rolling motion on the gear 318.

[0094] The second fitting part 314 has a flange 322. Two arcuate wedges 330 with curved inner surfaces are supported on the flange, which support the first fitting part 312 with their curved outer surfaces and with the sliding bearing bushing 324 inserted in between. The first follower 326, which can be driven by the shaft 7, has two follower arcuate parts 328 that are inserted with clearance between the narrow sides of the arcuate wedges 330. The mutually approaching broad sides of the arcuate wedges 330 are each equipped with an end finger of a spring 332, which forces the arcuate wedges 330 apart in the circumferential direction, so that the wedge-shaped geometry of the arcuate wedges 330 forces the gear 318 to mesh with the first ring gear 316 and reduces the clearance in the meshing area between the first ring gear 316 and the gear 318.

[0095] The arcuate wedge 330 and the spring 332 form an eccentric device, which presses the gear 318 on the meshing point with the first ring gear 316 in the direction extension line of the eccentric distance 3E. When the shaft 7 is driven, as described above, a relative rotation with overlapping swinging motion occurs between the gear 318 and the first ring gear 316.

[0096] The gear wheel 318 partially meshes with another toothed ring 382 formed on the third fitting part 381. The third fitting part 381 has a plurality of fastening pins 383 which can be connected to a structural component of the vehicle seat 1, preferably a structural component of the seat part 3.

[0097] The diameter of the tooth tip circle of the tooth portion 320 of the gear 318 is smaller than the diameter of the tooth root circle of the tooth portion 384 designed as an internal tooth of the other gear ring 382 by at least one tooth height. The corresponding difference in the number of teeth of at least one tooth of the gear 318 and the other gear ring 382 enables the gear 318 to perform a swinging rolling motion in the other gear ring 382.

[0098] The third fitting part 381 and the first fitting part 312 are fixed relative to each other axially and radially by a clamping ring 385. The first fitting part 312 and the clamping ring 385 each have a radially protruding fastening flange which can be connected to a structural component of the vehicle seat 1, preferably a structural component of the backrest 5.

[0099] The transmission accessory 300 has a disk 340 which is elastically preloaded in the radial direction as a component for ensuring that there is no play between the gear 318 and the other gear ring 382. The disk 340 meshes with the other gear ring 382. For this purpose, the disk 340 has a toothing 342 on the radial outer side, which meshes with the other gear ring 382, ​​and in the circumferential direction in the area where the gear 318 also meshes with the other gear ring 382.

[0100] The disc 340 is supported radially on the gear 318 by four pins 319 and four annular elastic elements 344. The four pins 319 are fixed on the gear 318 in a distributed manner on the periphery, for example, pressed into the holes of the gear 318. Each elastic annular elastic element 344 is respectively sleeved on one of the pins 319. The disc 340 has four holes aligned with the pins 319, and the four pins 319 together with the elastic elements 344 are inserted through these holes. Under the condition that the elastic elements 344 are elastically deformed, the disc 340 can move radially to a limited extent relative to the gear 318 in all directions.

[0101] As especially Fig.11 As can be seen in the figure, in the relaxed state of the disk 340, the radial outer area of ​​the tooth portion 342 of the disk 340 radially protrudes beyond the radial outer area of ​​the tooth portion 320 of the gear 318. The tooth tip circle radius of the tooth portion 342 of the disk 340 is greater than the tooth tip circle radius of the tooth portion 320 of the gear 318. Therefore, the disk 340 can compensate for the gap between the gear 318 and the other gear ring 382 in the radial direction.

[0102] The tooth thickness of the tooth portion 342 of the disk 340 is greater than the tooth thickness of the tooth portion 320 of the gear 318. Therefore, the disk 340 can also compensate for the gap between the gear 318 and the other gear ring 382 along the circumferential direction.

[0103] The toothed portion 342 of the disk 340 is slightly offset in the circumferential direction relative to the toothed portion 320 of the gear 318. Therefore, each tooth of the toothed portion 342 of the disk 340 has a tooth surface that is axially flush with a corresponding tooth surface of a tooth of the toothed portion 320 of the gear 318. The corresponding second tooth surface of each tooth of the toothed portion 342 of the disk 340 protrudes beyond the tooth surface of the corresponding tooth of the toothed portion 320 of the gear 318 in the circumferential direction.

[0104] The features disclosed in the preceding description, the claims and the drawings may be essential for realizing the invention in its various embodiments both individually and in combination with one another, as long as they remain within the scope of protection of the claims.

[0105] Reference numerals list:

[0106] 1 Vehicle Seat

[0107] 3 Seat parts

[0108] 5 Backrest

[0109] 7 Axis

[0110] 9 Handwheel

[0111] 100; 200; 300 Transmission accessories

[0112] 110 First single accessory

[0113] 112; 212; 312 First accessory part

[0114] 114; 214; 314 Second accessory part

[0115] 116; 216; 316 First gear ring

[0116] 117; 217; 317 teeth

[0117] 118; 218; 318 (first) gear

[0118] 119; 219 steps

[0119] 319 Pin

[0120] 120; 220; 320 teeth

[0121] 122; 222; 322 Flanging

[0122] 124; 224; 324 Sliding bearing bushing

[0123] 126; 226; 326 (first) follower

[0124] 128; 228; 328 Follower bow

[0125] 229 Axial safety element

[0126] 230; 330 Arch wedge

[0127] 232; 332 Spring

[0128] 140; 240; 340 disc

[0129] 142; 242; 342 teeth

[0130] 144; 244; 344 Elastic element

[0131] 150 Second single accessory

[0132] 152 Third Accessory Parts

[0133] 154 Fourth Accessory Part

[0134] 156 Second ring gear

[0135] 158 Second Gear

[0136] 159 steps

[0137] 160 Flanging

[0138] 162 Bow wedge

[0139] 164 Sliding bearing bushing

[0140] 166 Second follower

[0141] 170 Spring

[0142] 172 Second eccentric device

[0143] 180 Output components

[0144] 281; 381 Third accessory parts

[0145] 182; 282; 382 Another (third) ring gear

[0146] 383 Fixing pin

[0147] 184; 284; 384 teeth

[0148] 185; 285; 385 Holding ring

[0149] 190 Platter

[0150] 194 Elastic element

[0151] 1E1 First eccentricity

[0152] 1E2 Second eccentricity

[0153] 2E; 3E eccentricity

Claims

1. A transmission accessory for a vehicle seat, the transmission accessory comprising a first gear ring, a gear meshing with the first gear ring, another gear ring meshing with the gear, and a rotatable eccentric device for driving a relative rolling motion between the gear and the first gear ring, It is characterized in that An elastically preloadable component is provided for ensuring that there is no play between the gear and the further gear ring. The elastically preloadable component is a disk which can be preloaded against the further gear ring and has a more flexible material on the radial inside than on the radial outside.

2. The transmission accessory according to claim 1, It is characterized in that In order to ensure that there is no play between the gear wheel and the further ring gear, the elastically preloadable component can be preloaded in the radial direction.

3. The transmission accessory according to claim 1 or 2, It is characterized in that In order to ensure that there is no play between the gear wheel and the further ring gear, the elastically preloadable component can be preloaded in the circumferential direction.

4. The transmission accessory according to claim 1 or 2, It is characterized in that The elastically preloadable component is permanently elastically preloaded in the mounted state of the transmission fitting.

5. The transmission accessory according to claim 1, It is characterized in that The radially inner region of the disk is supported on the step of the gear with at least one elastic element interposed therebetween.

6. The transmission accessory according to claim 1, It is characterized in that The disc is supported on at least one component connected to the gear and at least one pin connected to the gear with at least one elastic element interposed therebetween.

7. The transmission accessory according to claim 1, It is characterized in that A radially outer region of the disk protrudes radially beyond a radially outer region of the gear.

8. The transmission accessory according to claim 1, It is characterized in that The disk has a toothing on the radial outer side, which meshes with the toothing of the further ring gear.

9. The transmission accessory according to claim 8, It is characterized in that The addendum circle radius of the tooth portion of the disk is greater than the addendum circle radius of the tooth portion of the gear.

10. The transmission accessory according to claim 8 or 9, It is characterized in that The tooth thickness of the tooth portion of the disk is greater than the tooth thickness of the tooth portion of the gear.

11. The transmission accessory according to claim 8 or 9, It is characterized in that The teeth of the disk are deflected relative to the teeth of the gear in the circumferential direction.

12. The transmission accessory according to claim 11, It is characterized in that Each tooth of the toothed portion of the disk has a tooth flank that is flush with a corresponding tooth flank of a tooth of the toothed portion of the gear in the axial direction.

13. A vehicle seat having a seat part and a backrest, It is characterized in that The backrest is articulated on the seat part so as to be adjustable about a backrest pivot axis by means of at least one transmission fitting according to any one of claims 1 to 12 .

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