SE463711B - ADJUSTABLE VEHICLE SEATS - Google Patents

Description

The vehicle seat according to the invention is characterized in that one or more of the supporting members and / or the backrest are adjustable by means of actuators, which are arranged on a common coupling and control shaft, and that the actuators can be engaged separately or in combination with each other by bringing the respective actuators into engagement with the coupling shaft via a carrier means, whereby a sleeve-shaped part of the actuator is imparted a radial or an axial movement during a rotation of the coupling shaft, whereby one or more of the supporting members and / or the backrest are affected.

Preferably, the coupling shaft carries a first actuator, by means of which the front edge of the seat is raised or lowered, a second actuator, by means of which the rear edge of the seat is raised or lowered, a third actuator, by means of which the seat is displaced forward or backward in its longitudinal direction, and a fourth actuators by means of which the backrest folds forwards or backwards. The seat is raised or lowered in its entirety by means of the first actuator and the second actuator in cooperation.

In a preferred form of the invention, the first actuator has a first gear, which is connected to a corresponding gear on a height-adjustable member which forms part of a front support member, which in turn constitutes a leg or a bone-like device for the vehicle seat. The second actuator has a second gear, which is connected to a corresponding gear on a height-adjustable member of a rear support member, the main function of which is the same as that of the front support member. The fourth actuator has a fourth gear, which is connected to a corresponding gear on a backrest shaft, which in turn is mounted in connection with the seat of the vehicle seat, and around which the backrest can be rotated forwards or backwards. a 10 15 20 25 30 35 .fa c \ The third actuator has a third gear, which is connected to a corresponding gear on a drive shaft, which in turn is connected to a drive device, through which the seat can shifted forward or backward. Preferably, the drive shaft extends centrally through the rear support member, which is also in communication with the second actuator. The drive shaft is then connected to a gear wheel, which is rotatably mounted on a part of the frame of the vehicle seat and arranged in connection with a rack or the like, which is fixedly connected to the vehicle. However, it is not necessary for the third actuator to have characteristics which coincide with the characteristics of the first, second and fourth actuators. The third actuator may alternatively comprise, for example, a screw and nut transmission, through which the seat on the vehicle seat can be displaced forwards or backwards.

In a preferred form of the invention, the carrier means are fixedly mounted on the coupling shaft, this being axially displaceable to predetermined positions, in which at least one carrier means is in engagement with the corresponding actuator. Preferably, the respective carrier means have external splines relative to the coupling shaft at the same time as the sleeve-shaped part of each actuator has corresponding internal splines. The splines on a carrier member are inserted into the splines in the sleeve-shaped part of the actuator when this actuator engages the coupling shaft.

The adjusting device for the vehicle seat can be given a different function depending on which actuators are in engagement with the coupling shaft. For a setting of a conventional vehicle seat, five setting positions are relevant, ie the actuators are connected to engagement with the coupling shaft in five different ways. These positions are hereinafter referred to as I-V. 10 15 20 25 30 35 _ | \ CF.

Cß '\' | _. .x J: In position I the third actuator is engaged with the coupling shaft, whereby the seat can be displaced forwards or backwards in relation to the frame by turning the coupling shaft either manually, for example by means of a crank or by means of a electric engine.

In position II, the fourth actuator is brought into engagement with the coupling shaft, whereby the backrest can be folded forwards or backwards by the rotation of the backrest shaft, which is effected by a rotation of the coupling shaft.

In position III, the second actuator is brought into engagement with the coupling shaft, whereby the rear support members of the vehicle seat can be raised or lowered by a rotation of the coupling shaft.

In position IV, the first actuator is brought into engagement with the coupling shaft, whereby the front support members of the vehicle seat can be raised or lowered by a rotation of the coupling shaft.

In position V, the first actuator is maintained in engagement with the coupling shaft at the same time as the second actuator is brought into engagement with the coupling shaft again. When the coupling shaft is rotated, the front and rear support members of the vehicle seat can thereby be raised or lowered simultaneously.

In an alternative embodiment of the invention, the coupling shaft is driven by an electric motor which is arranged with one and the same direction of rotation. The carrier means are here mounted on a sleeve-shaped member which surrounds the coupling shaft, the sleeve-shaped member circumferentially enclosing the same. The sleeve-shaped member is axially displaceable along the coupling shaft from a neutral position to a first engaging position, in which the carrier means are in engagement with the actuator and cause it to rotate in the same position. (7 H4 4 UJ- a) 12: Kn -rn direction as the coupling shaft, or to a second engaging position, in which the carrier means are engaged with a gear to the actuator and cause it to rotate in the opposite direction to the coupling shaft. The sleeve-shaped member is here provided with a coupling plate, which extends in a plane perpendicular to the coupling shaft and which is surrounded by two electromagnets. When an electric current is applied to either of the electromagnets, it exerts a force on the coupling plate which causes the sleeve-shaped member to be displaced axially along the coupling shaft so that the carrier means on the sleeve-shaped member are displaced from the free position to either of the two engaging positions. When the electric current is cut off to the electromagnet in question, the sleeve-shaped member and the carrier means are returned to the free position by means of a return spring.

In the alternative embodiment of the invention, the setting of the positions of the vehicle seat can be controlled from a control unit which is arranged, for example, on the instrument panel of the vehicle.

The control unit can be designed as a keypad and communicate with a computer in whose memory preselected position settings can be stored. A vehicle driver can thereby store the setting modes currently relevant to him in the computer's memory and, for example, set the vehicle seat in the desired position by entering a code on the keypad.

DESCRIPTION OF FIGURES The invention is described below in the form of exemplary embodiments in connection with the accompanying figures.

Figure 1 shows a vehicle seat according to the invention seen from the side, wherein its seat and backrest are only fragmentarily marked. Figure 2 shows an enlargement of the front portion of the vehicle seat of Figure 1 in a longitudinal section through one of its front legs.

Figure 3 shows an enlargement of the rear portion of the vehicle seat according to Figure 1 in a longitudinal section through one of its rear legs.

Figure U shows a cross section of a posterior leg along the line A-A in Figure 3.

Figure 5 shows a detail of the rotation mechanism of the backrest in a cross section along the line B-B in Figure 3.

Figure 6 shows a first alternative embodiment of the vehicle seat according to the invention seen from the side.

Figure 7 shows an enlargement of the front portion of the vehicle seat according to Figure 6 in a longitudinal section through its front leg portion.

Figure 8 shows an enlargement of the rear portion of the vehicle seat according to Figure 1 in a longitudinal section through its rear leg portion.

Figure 9 shows a second alternative embodiment of the vehicle seat according to the invention seen from the side.

Figure 10 shows an enlargement of the front portion of the vehicle seat according to Figure 9 in a longitudinal section through its front legs.

Figure 11 shows an enlargement of the rear portion of the vehicle seat according to Figure 9 in a longitudinal section through one of its legs. 4.4 15 '12 Figure 12 shows a detail of the device according to figure 10.

Figure 13 shows a cross section along the line C-C of the part according to figure 12.

EXAMPLE 1 A vehicle seat according to Figures 1-5 comprises a seat 1, which is supported by a frame 2, and a backrest 3, which is hingedly connected to the seat 1 at its rear edge. The frame 2 comprises two outer U-shaped frame beams U, which extend along the sides of the chair in its longitudinal direction, and which are intended to be attached to the floor of the vehicle, which, however, is not shown in the figures. The respective outer frame beam U has a groove extending along its upper side, through which a front leg 5.1 and a rear leg 5.2 extend and are mounted on an inner U-shaped frame beam 6 which is slidably arranged inside the respective outer frame beam Ä, together forming a guide. The respective legs 5.1, 5.2 which are shown in Figures 2, 3 and U are connected to the seat 1 via brackets 6, one of which is shown fragmentarily in Figure N. The respective bracket 6 is provided with a substantially vertical cylindrical bracket sleeve 7. at its lower end. which forms a height-adjustable upper section of the respective legs 5.1, 5.2. A cylindrical ball nut 8 is rotatably mounted in the bracket sleeve 7 and is provided with a conical first gear 9 projecting over the upper end of the bracket sleeve 7 and with a stop nut 10 projecting above the lower end of the bracket sleeve 7. The ball nut 8 is thereby held fixed against displacement in its axis direction. A lower section of the leg 5.1, 5.2 consists of a ball screw 11.1, 11.2, which is provided with a thread along its entire length, and which is inserted into the thread of the ball nut 8. The balls in this thread are arranged in a manner known for ball threads. The ball screw 11.1, 11.2 is attached at its lower part to the inner 10 15 20 25 30 35 4 »rQ-“ x (N sd ...... \ ... on the frame beam 6 so that it does not rotate around its length axis when the ball nut 8 is caused to rotate about the same longitudinal axis, when the first bevel gear is driven, the ball nut 8 is caused to rotate in the bracket sleeve 7 and move itself and the bracket sleeve 7 up or down on the ball screw 11.1, 11.2, which in turn entails an increase or decrease of the console 6 and the seat 1.

Figure 2 shows one of the two front legs 5.1 of the vehicle seat. The front ball screw 11.1 here consists of a solid rod, the lower end of which is rotatably mounted on a ball screw shaft 12, which extends perpendicular to the frame beams H, 6, and which is displaceable in a groove 13 in two front bearings 14, which are mounted on each side of the front ball screw 11.1 in connection with the vertical walls of the inner frame beam 6. The function of the track 13 will be described below in connection with a description of the different functions of the vehicle seat.

Figures 3 and U show one of the two rear legs 5.2 of the vehicle seat. The rear ball screw 11.2 here consists of a tubular rod, the lower end of which is provided with two ball screw shaft pins 15, which are arranged with a common pivot shaft, which extends perpendicular to the sides of the beams U, 6, i.e. parallel to the ball screw shaft 12 on the respective front ben 5.1. The ball screw pins 15 are rotatable in two rear bearings 16, which, like the two front bearings 1H, are mounted on each side of the rear ball screw 11.2. Centrally inside the rear ball screw 11.2, a drive sleeve 17 is arranged, which has an inner circumferential surface with a hexagonal cross-section. The drive sleeve 17 is prevented from sliding axially downwards by means of a screw ring 18, which is screwed into a threaded recess in the lower end of the rear ball screw 11.2. A hexagonal transmission shaft 19, the cross section of which coincides with the inner cross section of the drive sleeve 17, extends up through the drive sleeve 17 and out through a cylindrical bearing in the first bevel gear 9 on the ball nut 8. The transmission shaft 19 is provided with a cylindrical portion 20 corresponding to the bearing, in the direct connection of which a second bevel gear 21 is arranged on the transmission shaft 19.

A drive gear 22 is arranged at the lower end of the rear ball screw 11.2 and has an axis of rotation which coincides with the axis of rotation of the rear ball screw 11.2. The drive gear 22 is mounted partly in a lower bearing 23 in the inner frame beam 6 and partly in an upper bearing 2U in a bracket 25 which extends along the bottom of the inner frame beam 6 and is fixedly connected thereto. The upper shaft pin of the drive gear 22 is formed into a drive head 26, which has a substantially spherical shape with a cross-section through the center of the sphere corresponding to the cross-section of the drive sleeve 17, into which the drive head 26 is inserted. Through the spherical hexagonal drive head 26, a rotational movement of the drive sleeve 17 can be transmitted to the drive gear 22 even when the axis of rotation of the drive sleeve 17 is inclined against the axis of rotation of the drive gear 22. As shown in Figure 4, the drive gear 22 communicates with the outer frame beam N of the vehicle seat. During a drive of the second bevel gear 21 on the transmission shaft 19, the drive gear 22 rotates and displaces the inner frame beam 6 along the outer frame beam 4.

A coupling and control shaft 27 extends along the underside of the seat 1 from its front edge to its rear edge at the backrest 3, and along one side of the vehicle seat in a plane through the legs 5.1, 5.2 on this side. The coupling shaft 27 is supported by a number of shaft brackets extending downwards from the underside of the seat 1. The coupling shaft 27 is displaceable in its longitudinal direction and rotatable about its longitudinal axis by means of an operating device 28, which is arranged on a first shaft bracket 29, which in turn is provided with a first bearing 30 for the coupling shaft 27. 10 15 20 25 30 35 The operating device 28 comprises a main gear 31, which can be rotated about its main axis 32 by means of a crank 33.

The main gear 31 is provided with an internal toothed path, which communicates with a shaft gear 33 on the coupling shaft 27. The main gear shaft 32 is mounted in a drive plate 35, which partly encloses the coupling shaft 27 immediately adjacent to the shaft gear 3U and which is partly displaceable in a straight guide 36 through a guide boom 37 inserted therein, which extends parallel to the coupling shaft 27. The guide boom 37 is fixed in a hole in the operating plate 35 by a locking pin 38. The guide boom 37 is provided with five position grooves 39, which are intended to be inserted into engagement with a spring-loaded ratchet ball 40, which is arranged in contact with the guide boom 37 inside a hole in the straight guide 36.

When the main gear 31 is displaced to the left in Figure 2, the carrier plate 35 is also included in that a first groove spring ring 41 on the main gear shaft 32 transmits the force from the tension in the crank 33 when it is in the dashed position in Figure 2. At the same time the carrier plate 35 transmits the force from the crank 33 to the shaft gear 3U which in turn displaces the coupling shaft 27 axially to the left in Figure 2. The guide boom 37 is thereby displaced until one of the position grooves 39 thereon is brought into contact with the ratchet ball H0. These position grooves 39 are adapted to correspond to positions for engaging various driving movements when adjusting the vehicle seat. When the main gear 31 is displaced to the right back to the position shown in Figure 2, the force is first transmitted to the carrier plate 35 which in turn transmits the force to the coupling shaft 27 via a second groove spring ring H2 arranged on the coupling shaft 27 on the other side of the carrier plate 35 in relation to the shaft gear 3ü. At the end of the actuation, the crank 33 of the actuator 28 can be folded into a recess 43 in the main gear 31. A first actuator HH, as shown in Figure 2, is arranged on the coupling shaft 27 at one of the front leg 5.1.

The first actuator HH comprises a first cylindrical actuator sleeve H5, which encloses the coupling shaft 27 and which at its one end has a third bevel gear H6 which communicates with the first bevel gear 9 on the ball nut 8 to the front leg. 5.1. The first actuator sleeve H5 is rotatably mounted and fixed against axial displacement in a second shaft bracket H7 which communicates with the seat 1. The end of the first actuator sleeve H5, which is opposite the end of the third bevel gear H6, extends in a direction from the front leg 5.1 towards the front edge of the seat 1. The inner jacket surface of the first actuator sleeve H5 is provided with splines H8, which are intended to be brought into engagement with a first carrier H9, which is provided with corresponding splines, and which is fixedly connected to the coupling shaft 27. When the first carrier H9 is in engagement with the spline H8 in the first actuator sleeve H5, a rotational movement is transmitted from the main gear 31 in the actuator 28 via the coupling shaft 27 and the first actuator sleeve H5 with the third bevel gear H6 to the first bevel gear 9 on the front nut 8 of the ball nut leg 5.1. The ball nut 8 is then caused to rotate and to be raised or lowered at the same time in relation to the front ball screw 11.1.

A second actuator 50, as shown in Figure 3, is arranged on the coupling shaft 27 at the rear leg 5.2 which is in the same plane as that which runs through the coupling shaft 27 and the front leg 5.1. The second actuator 50 comprises a second cylindrical actuator sleeve 51, which encloses the coupling shaft 27, and which at its one end has a fourth bevel gear 52, which communicates with the first bevel gear 9 on the ball nut 8 of the rear leg. 5.2. The other 10 15 20 25 30 35 4.52; 71 ": The actuator sleeve 51 is rotatably mounted and fixed against axial displacement in a third shaft bracket 53 which communicates with the seat 1. The end of the second actuator sleeve, which is opposite the end of the fourth bevel gear 52, extends in a direction from the rear leg 5.2 towards the front edge of the seat 1. The inner circumferential surface of the second actuator sleeve 51 is provided with an outer row of splines 54 and, at a distance therefrom along the coupling shaft 27, an inner row of splines 55, which are intended to be engaged with a second carrier 56, which is provided with corresponding splines, and which is fixedly connected to the coupling shaft 27. When the second carrier 56 is in engagement with the outer row of splines SN or the inner row of splines 55 in the second actuator sleeve 51 a rotational movement is transmitted from the main gear 31 in the actuator 28 via the coupling shaft 27 and the second actuator sleeve 51 with the fourth bevel gear 52 to the first bevel gear the gear wheel 9 on the ball nut 8 on the rear leg 5.2. The ball nut is then caused to rotate and to be raised or lowered at the same time in relation to the rear ball screw 11.2.

A third actuator 57, which is also shown in figure 3, is arranged on the coupling shaft 27 at the rear leg 5.2 but directed backwards from the rear leg 5.2 towards the rear edge of the seat 1. The third actuator 57 comprises a third cylindrical actuator sleeve 58, which encloses the coupling shaft 27 and which at its one end has a fifth bevel gear 59, which communicates with the first bevel gear 9 on the ball nut 8 to the rear leg 5.2. The third actuator sleeve 58 is rotatably mounted in a fourth shaft bracket 60 which communicates with the seat 1. The inner shell surface of the third actuator sleeve 58 is provided with splines at the end opposite the end of the fifth bevel gear 59. 61, which are intended to be brought into engagement with a third carrier 62, which is provided with corresponding splines, and which is fixedly connected to the coupling shaft 27. In Figure 3, the third carrier 62 is shown in engagement with the spline 61 of the third actuator sleeve 58.

A rotational movement from the main gear 31 is transmitted via the clutch shaft 27 and the fifth bevel gear 59 to the second bevel gear 21, which is arranged on the transmission shaft 19, which extends through the rear leg 5.2 to the drive head 26 of the drive gear 22, the drive gear 22 to rotate and displace the inner frame beam 6 in the outer frame beam 4 in a guide movement.

A fourth actuator 63, which is also shown in Figure 3, is arranged around the rear end of the coupling shaft 27 at the backrest 3 on the seat 1. The fourth actuator 63 comprises a fourth actuator sleeve 64, which is provided with a screw tooth path 65, which extends along its cylindrical mantle surface. The fourth actuator sleeve 64 is rotatably mounted in a fourth shaft bracket 66 and a fifth shaft bracket 67, which are located on each side of the fourth actuator sleeve 64, and which communicate with the seat 1. The inner shell surface of the the fourth actuator sleeve 64 is provided with splines 68, which are intended to be brought into engagement with a fourth driver 69, which is fixedly connected to the coupling shaft 27. The screw tooth path 65 is in engagement with a tooth sector 70, which is fixedly mounted on a tubular backrest axle 71, which is rotatably mounted in the frame 2 of the vehicle seat, on which axle the backrest 3 is mounted. A detail of the engagement of the fourth actuator sleeve 64 with the tooth sector 70 is shown in Figure 5, from which it appears that the tooth sector 70 consists of a disc-shaped element, which extends perpendicular to the backrest shaft 71, and which is provided with teeth 72 directed in the longitudinal direction of the backrest shaft 71. the fourth actuator sleeve 64. A rotational movement from 10 15 20 25 30 35 oi Lv! sa -.- à -uà 1Ä the main gear 31 is transmitted via the coupling shaft 27 and the helical gear path 65 of the fourth actuator 63 to the gear sector 70 and the backrest shaft 71, the backrest 3 being folded forwards or backwards depending on the direction of rotation of the coupling shaft 27.

The first actuator ÄH communicates, via the third bevel gear 46, with a sixth bevel gear 73, which is supported by a first transverse shaft 7U extending from one leg 5.1 in the front leg portion of the vehicle seat to the other. the leg, not shown in the figures, at which the transverse shaft carries an additional bevel gear which communicates with the first bevel gear on this leg. The second actuator 52 communicates, via the fourth bevel gear 52, with a seventh bevel gear 75, which is supported by a second transverse shaft 76 which, as with the front pair of legs 5.1, connects the rear pair of legs 5.2.

Adjusting device for the vehicle seat according to Figures 1-5 can be given different function depending on in which position the guide boom 37 is adjusted in relation to the straight guide 36. In the position shown in the figures the third actuator 57 is in engagement with the coupling shaft 27, whereby the seat 1 can be displaced forwards or backwards relative to the frame 2 by a rotation of the main gear 31 by means of the crank 33 mounted thereon. This position is marked with I at the corresponding position groove 39 on the guide boom 37 as shown in figure 2. The other positions for adjusting the guide boom 37 are marked with the references II-V.

When the guide boom 37 is extended to position II, the fourth actuator 63 is brought into engagement with the coupling shaft 27, whereby the backrest 3 can be folded forwards or backwards by the rotation of the backrest shaft 71, which is effected by a rotation of the main gear 31 by means of of the web 33.

When the guide boom 37 is extended to position III, the second actuator 50 is brought into engagement with the coupling shaft 27, whereby the rear pair of legs 5.2 can be raised or lowered by a rotation of the main gear 31 by means of the crank 33. The seat 1 then rotates about an axis extending perpendicular to its longitudinal direction at the same time as its rear legs 5.2 rotate about the respective ball screw shaft pins 15 in the rear bearings 16 for these. Its front legs 5.1 simultaneously rotate about the respective ball screw shaft 12, which are simultaneously displaced towards the front or rear end of the seat 1 in the respective grooves 13 in the front bearings 14.

When the guide boom 37 is extended to position IV, the first actuator UU is brought into engagement with the coupling shaft 27, whereby the front leg pair 5.1 can be raised or lowered by a "rotation of the main gear 31 by means of the crank 33. The seat 1 and the two leg pairs 5.1, 5.2 rotate in the same way as in the case of raising or lowering the pair of hind legs 5.2.

When the guide boom 37 is extended to the position V, the first actuator ÄH is maintained in engagement with the coupling shaft 27 at the same time as the second actuator 50 is brought into engagement with the coupling shaft 27. When the main gear 31 is rotated by means of the crank 33, the front leg pair can 5.1 and the rear leg pair 5.2 is raised or lowered simultaneously. During this movement, the seat 1 can optionally lean against the frame 2 depending on the length of the front leg pair 5.1 and the rear leg pair 5.2 in the initial position. 711 W EXAMPLE 2 In an alternative embodiment of the invention according to Figures 6-8, the vehicle seat comprises a seat 101, which is supported by a frame 102, and a backrest 103, which is hingedly connected to the seat 101 at its rear edge. The frame 102 here comprises, as in Example 1, an outer and an inner frame beam, of which only the inner frame beam 10ü is shown in the figures. In this embodiment of the invention, the two pairs of legs are designed as telescopic straight guides 105, which are not intended to support the weight of the vehicle seat but only to control the movements of the seat 1 and keep it fixed in different positions. The straight guides 105 are marked with dashed lines in the figures. The attachment of the straight guides 105 to the inner frame beam 104 is performed in the same way as in Example 1 and is not shown in the figures. A coupling shaft 106 in this example extends centrally along the underside of the seat 101 from its front to its rear end, and carries four actuators.

A first actuator 107, shown in Figure 7, is mounted on the coupling shaft 106 at the front pair of straight guides 105 and includes a first cylindrical actuator sleeve 108, which encloses the coupling shaft 106 and which has a first helical tooth path 109 extending along it. mantelyta. The first helical gear path 109 communicates with a first gear 110, which is rotatably mounted on a front transverse shaft 111 extending between the front straight guides 105, perpendicular to the longitudinal direction of the seat 101, and is rotatably mounted therein. A front cam disc 112 is rotatably mounted on the front transverse shaft 111 in a plane perpendicular thereto and on the inside of and adjacent to the respective front straight guide 105 and provided with a cam groove 113 extending in a helical sector from an inner point to a outer point of the front cam plate 112. A 10 15 20 25 30 35 “J ... s ... x 17 front guide pin 114 is fixedly mounted on the inner frame beam 104 and directed parallel to the front transverse shaft 111 and projecting into the cam groove 113. Upon a rotation of the front transverse shaft 111, the respective cam disc 112 is caused to rotate relative to the respective guide pin 114, whereby the distance between the front transverse shaft 111 and the respective front guide pin 11ü is changed. The first actuator sleeve 108 is rotatably mounted and fixed against axial displacement between a first shaft bracket 115 and a second shaft bracket 116 which communicates with the seat 101. The inner shell surface of the first actuator sleeve 108 is provided with splines 117, which are intended to be brought into engagement with a first carrier 118, which is provided with corresponding splines, and which is fixedly connected to the coupling shaft 106. The first actuator sleeve 108 further forms a bearing for the front end of the coupling shaft 106. When the first driver 118 engages the spline 117 of the first actuator sleeve 108, a rotational motion of the clutch shaft 106 and the first actuator sleeve 108 is transmitted with the helical gear 109 to the first gear 110 on the front transverse shaft 111. The two front cam discs 112 on the front transverse shaft 111 then rotates uniformly, whereby the front portion of the seat 101 is raised or lowered relative to the frame 102 depending on the direction in which the coupling shaft 106 is rotated.

A second actuator 119, shown in Figure 8, is mounted on the coupling shaft 106 at the rear pair of straight guides 105 and includes a second cylindrical actuator sleeve 120, which encloses the coupling shaft 106 and which has a second helical path 121 extending along its mantle surface. The second helical gear path 121 communicates with a second gear 122, which is rotatably mounted on a rear transverse shaft 123, which extends parallel to the front transverse shaft 111 between the rear straight guides 105 and is rotatably mounted therein. 10 15 20 25 30 35 455 711 w Two rear cam discs 129 are rotatably arranged on the rear transverse shaft 123 adjacent to the respective rear straight guide 105 in the same manner as the two front cam discs 112 and are mirror-inverted relative thereto. The two rear cam discs 12H have a cam groove 125 in which a rear guide pin 126 is located as in the front cam discs 112. The second actuator sleeve 120 is rotatably mounted and fixed against axial displacement between a third shaft bracket 126 and a fourth shaft bracket 127. , which communicate with the seat 101. The inner jacket surface of the second actuator sleeve 120 is provided with splines 128, which are intended to be brought into engagement with two other carriers 129, which are provided with splines, and which are fixedly connected to the coupling shaft. When the second driver 129 engages the spline 128 of the second actuator sleeve 119, a rotational motion of the clutch shaft 106 and the second actuator sleeve 120 is transmitted with the helical gear 121 to the second gear 122 on the rear transverse shaft 123. The two the rear cam discs 124 on the rear transverse shaft 123 thereby rotate uniformly, whereby the rear portion of the seat 101 is raised or lowered relative to the frame 102 depending on the direction in which the coupling shaft 106 is rotated.

A third actuator 130, shown in Figure 8, is disposed on the coupling shaft 106 between the first actuator 107 and the second actuator 119 and includes a third cylindrical actuator sleeve 131, which encloses the coupling shaft 106 and extends along most of it. . The third actuator sleeve 131 is provided with a thread along its outer jacket surface and forms a ball screw for a ball nut 132, which communicates with the floor of the vehicle via a telescopically displaceable strut 133, which extends perpendicular to the coupling shaft 106. The third actuator sleeve 131 is rotatably mounted and fixed against axial displacement between a fourth shaft bracket 134, 15 20 25 30 35 Ia. : __, \ r .__. 19 which is shown in Figure 7, and a fifth shaft bracket 135, which is shown in Figure 8, both of which communicate with the seat 101. The inner shell surface of the third actuator sleeve 131 is provided with splines 136, which are intended to is engaged with a third carrier 137, which is provided with corresponding splines, and which is fixedly connected to the coupling shaft 106. When the third carrier 137 is in engagement with the splines 136 in the third actuator sleeve 131, a rotational movement of the coupling shaft 106 is transmitted. to a rectilinear movement between the third actuator sleeve 131 and the ball nut 132, the third actuator sleeve 131 being displaced linearly together with the seat 101 relative to the telescopic strut 133.

A fourth actuator 138, shown in Figure 8, is disposed about the rear end of the coupling shaft 106 at the backrest 103 of the seat 101. The fourth actuator 138 includes a fourth actuator sleeve 139 which is provided with a third screw tooth 140. extending along its cylindrical mantle surface. The fourth actuator sleeve 139 is rotatably mounted between a sixth shaft bracket 141 and a seventh shaft bracket 142, which communicate with the seat 101. The inner shell surface of the fourth actuator sleeve 139 is provided with splines 143, which are located in engagement with a fourth driver 144, which is fixedly connected to the coupling shaft 106. The fourth actuator sleeve 139 further forms a bearing for the rear end of the coupling shaft 106. The third helical gear path 140 is engaged with a gear 145, which is fixedly mounted on a shaft 146, on which the backrest 103 is mounted. This axle 146 is rotatably mounted in the frame 102 of the vehicle seat. A rotational movement of the clutch shaft 106 is transmitted to the helical tooth 140 and the fourth position pin 139 on the: fourth actuator 138 to the gear 145 on the backrest shaft 146, wherein the i; ao the backrest 103 folds forwards or backwards depending on the direction of rotation of the coupling shaft 106.

The adjusting device for the vehicle seat according to Figures 7 and 8 can be given different function depending on in which position the coupling shaft 106 is adjusted in relation to a guide 147, which is mounted on the seat 101, and in which the coupling shaft 106 is axially displaceable between different positions marked IV in Figure 7. The coupling shaft 106 is provided with five position grooves 148, which are intended to be brought into contact with a spring-loaded ratchet ball 1ü9, which is arranged in contact with the coupling shaft 106 inside a hole in the guide 147. A hub 150 is fixedly attached to the front end of the coupling shaft 106 and provided with a crank 151 by means of which the coupling shaft 106 is rotated.

When the clutch shaft is shifted to the left in Figure 7, it can be made to assume different positions which correspond to positions for clutching different drive movements when adjusting the vehicle seat. At the end of the operation, the crank 151 can be folded into a recess 152 in the hub 150.

When the clutch shaft 106 is in position I, as shown in Figures 7 and 8, the fourth actuator 138 is engaged with the clutch shaft 106, whereby the backrest 103 can be folded forwards or backwards by the rotation of the backrest shaft 146, which is effected by a rotation of the clutch shaft. shaft 106 by means of the crank 151 on the hub 150.

When the coupling shaft 106 is extended to position II, the third actuator 130 is brought into engagement with the coupling shaft 106, whereby the seat 101 can be displaced forwards or backwards relative to the frame 102 by a rotation of the coupling shaft 106 by means of the crank 151 on the hub 150.

When the coupling shaft 106 is extended to position III, the second actuator 119 is brought into engagement with the coupling shaft 106, whereby the rear portion of the seat 101 can be raised or lowered by a rotation. of the coupling shaft 106 by means of the crank 151 on the hub 150.

When the coupling shaft 106 is extended to position IV, the first actuator 107 is brought into engagement with the coupling shaft 106, whereby the front portion of the seat 101 can be raised or lowered by a rotation of the coupling shaft 106 by means of the crank 151 on the hub 150.

When the clutch shaft 106 is extended to position V, the first actuator 107 is maintained in engagement with the clutch shaft 106 at the same time as the second actuator 119 is brought into engagement with the clutch shaft 106 again. When the clutch shaft 106 is rotated, the seat 101 can be raised or lowered uniformly. . During this movement, the seat 101 can optionally lean against the frame 102 depending on the position in which its front and rear portions, respectively, are in the initial position. . EXAMPLE 3 In a further alternative embodiment of the invention according to Figures 9-13, the vehicle seat comprises a seat 201, which is supported by a frame 202, and a backrest 203, which is hingedly connected to the seat 201 at its rear edge. The frame 202 comprises two outer frame beams 20ü which have a groove extending along the upper side of each frame beam, through which a front and a rear leg 205 extend and are mounted on an inner frame beam 206 which is slidably arranged inside the respective outer frame beam. 20U. Each leg 205 has a design identical to the corresponding legs 5.1, 5.2 on the vehicle seat according to Example 1. A coupling shaft 207 extends, as in Example 1, along one side of the seat 201 parallel to the frame beams 20ü, 206 and carries four actuators. The coupling shaft 207 has a hexagonal cross-section which extends uninterrupted on each side of a transmission 208 which is partly connected to the coupling shaft 207 and partly is connected to an electric motor 209.

A first actuator 210, shown in Figure 10, is mounted on the coupling shaft 207 at one front leg 205.1. As shown in detail in Figures 12 and 13, the first actuator 210 comprises an actuator housing 211, which surrounds the clutch shaft 207, and which at one end of the clutch shaft 207 has a bevel gear 212 and at its other end has an internal cylindrical gear 213. On a first axle bracket 214, which is fixedly mounted on the seat 201, a planet gear plate 215 is fixedly supported, which carries three cylindrical planetary gears 216, which partly engage with the inner gear 213 on the actuator housing 211 and partly engage with a sun gear 217 rotatably mounted on a coupling sleeve 218 surrounding the coupling shaft 207. The inner end of the coupling sleeve 218, located inside the actuator housing 211, is provided with a carrier 219 provided with splines, which can be brought into engagement with the corresponding first splines 220. inside an inner recess in the actuator housing 211 or with corresponding second splines 221 in a recess in the sun gear 217 by an axial fork jutting the coupling sleeve 218 from a free position, in which the carrier 219 is not engaged. This neutral position is arranged in an outer recess in the actuator housing 211. The outer end of the coupling sleeve 218 is provided with a circular coupling disc 222, which extends in a plane perpendicular to the coupling shaft 207, and which projects downwards between them. a first electromagnet 223 and a second electromagnet 22ü, which are schematically shown in Fig. 12, and of which the first electromagnet 223 is arranged between the clutch disc 222 and the planet wheel plate 215 on the first axle bracket 21ü. The coupling sleeve 215 has a hexagonal inner cross-sectional shape which coincides with the outer cross-sectional shape of the coupling shaft 207, whereby the coupling sleeve 218 accompanies the coupling shaft 207 upon its rotation.

When the first electromagnet 223 is supplied with an electric current, it exerts a pulling force on the coupling plate 222, which is made of a magnetic material. The coupling sleeve 218 is thereby displaced from its free position so that its carrier 219 is brought into engagement with the first splines 220 on the actuator housing 211, which is thereby directly connected to the coupling shaft 207 and accompanies it upon its rotation. When the current is cut off to the first electromagnet 223, the coupling sleeve 218 is returned to its free position by means of a return spring, which is not shown in the figures.

When the second electromagnet 224 is supplied with an electric current, it exerts a pulling force on the coupling plate 222 in the opposite direction to that produced by the first electromagnet 223. The coupling sleeve 218 is thereby displaced from its free position so that its carrier 219 is brought into engagement with the second splines. 221 on the sun gear 217, which is then directly connected to the clutch shaft 207. Upon rotation of the clutch shaft 207, the sun gear 217 is included and causes the planet gears 216 to rotate and transmit the movement to the inner gear housing 211's internal gears 213. gear 212 is thereby caused to rotate in the opposite direction of rotation to the coupling shaft 207. When the current is interrupted to the second electromagnet 22ü, the coupling sleeve 218 is returned to its free position by means of a second return spring, which is also not shown in Fig. PGPD1. .

The conical gear 212 of the first actuator 210 communicates partly with a corresponding gear on the front 10 15 20 25 30 35 -FH os L1 sa ... Ä 24 leg 205.1 to the vehicle seat and partly in connection with a conical gear on a front transverse shaft , which connects the two front legs of the vehicle seat as in Example 1, whereby the front portion of the seat 201 can be raised or lowered.

A second actuator 225, as shown in Figure 11, is mounted on the clutch shaft 207 at one rear leg 205.2 on the same side of the vehicle seat as the front leg 205.1. The second actuator 225 communicates with a second shaft bracket 226, which is mounted on the seat 201, and includes the same kind of parts as the first actuator 210, as described in connection with Figures 12 and 13.

The conical gear 212 of the second actuator 225 communicates partly with a corresponding gear on the rear leg 205.2 of the vehicle seat and partly with a conical gear on a rear transverse axle connecting the two rear legs of the vehicle seat as in Example 1, whereby the seat 201 rear section can be raised or lowered.

A third actuator 227, also shown in Figure 11, is mounted on the clutch shaft 207 at the same rear leg 205.2 as the second actuator 225. The third actuator 227 communicates with a third shaft bracket 228 mounted on the seat 201, and includes the same kind of parts as the first actuator 210 and the second actuator 225. The conical gear 212 of the third actuator 227 communicates with a corresponding gear on a transmission shaft extending through the rear leg 205.2 and is connected to a drive gear which in turn, the outer frame beam 20ü acts, whereby the seat 201 can be displaced forwards or backwards.

A fourth actuator 229, also shown in Figure 11, is mounted on the coupling shaft 207 at its rear end.

The fourth actuator 229 is arranged between a fourth shaft bracket 230 and a fifth shaft bracket 231, which are mounted on the seat 201, and comprise the same parts such as the first actuator 210, except that the actuator housing 211 here is provided with a screw gear 232 which is arranged on its cylindrical outer shell surface.

The screw gear 232 communicates with a gear sector on a backrest shaft by means of which the backrest 203 can be folded forwards or backwards.

The adjusting device for the vehicle seat according to Figures 10-13 can be given a different function depending on how the electromagnets 223, 224 are activated at the different actuators.

All actuators are in neutral when none of the electromagnets 223, 22ü are activated. Since all actuators can be brought into engagement in each of the two operating positions, a large number of movement combinations can be performed, of which only the five most important are to be touched.

When the first actuator 210 is brought into engagement alone, the front portion of the seat 201 can be raised or lowered. When the second actuator 225 is brought into engagement alone, the rear portion of the seat 201 can be raised or lowered. When the first and the second actuators 210, 225 are simultaneously engaged, the electromagnets 223, 22ß are activated in such a way that the entire seat 201 is raised or lowered.

In an alternative embodiment of the invention, which is not shown in the figures, the supporting members can be made with a fixed length, but pivotable about mutually parallel axes arranged at the lower and upper end of the supporting members, respectively. At the upper end of the support members, the rotary shaft is connected to an actuator which can be connected separately or in combination with other actuators arranged on one and the same coupling and operating shaft. This control shaft is then provided with two different thread sections arranged at each end of the coupling and control shaft. The two thread sections then have thread rises which are 10 15 20 25 30 35 f./_f,- k.

'\ J _ VTÅÅ' x fi Iíï 26 opposite each other. When the coupling shaft is rotated, the front actuator and the rear actuator, respectively, are caused to move towards each other or from each other, depending on whether they are connected at the same time or not. With a simultaneous connection of the front and rear actuators, a uniform raising or lowering of the vehicle seat is obtained. When connecting only the front actuator, the front part of the seat can be raised or lowered separately, while when the rear actuator is connected, the rear part of the seat can be raised or lowered separately.

The supporting members can also be arranged in the form of a scissor link on each side of the seat, the lower part of one of these members being displaceable in the longitudinal direction of the frame. When raising or lowering the seat as a whole or the front or rear edge of the seat, a sliding takes place between the slidable lower part of the respective scissor link and the frame of the vehicle seat.

Claims (8)

10 15 20 '25 30 35 _ 4 _' 31 ,. % L> u f: s 27 PATENT REQUIREMENTS Adjustable vehicle seat comprising a seat (1), which is supported by a frame (2) or by a frame-like part of the vehicle, and a backrest (3), which is optionally articulated connected to the seat (1) and foldable forwards or backwards perpendicular to the longitudinal direction of the seat (1), the seat (1) communicating with the frame (2) via supporting means (5) and being height-adjustable in its entirety, or its front edge or rear edge being individually height-adjustable, or the seat (1) as a whole is displaceable in its longitudinal direction relative to the frame (2), whereby the movements of the seat (1) and possibly the backrest (3) can occur both separately and in combination with each other, characterized in that one or more of the support members (5) and / or the backrest (3) are adjustable by means of actuators (44, 50, 57, 63), which are arranged on a common coupling and operating shaft (27), and that the actuators ( 44, 50, 57, 63) can be connected separately or in combination with each other by the actuators b is engaged with the coupling shaft (27) via carrier means (49, 56, 62, 69) which are rotatably arranged on the coupling shaft (27), a sleeve-shaped part (45, 51, 58, 64) of the actuators located in engagement with the corresponding carrier means, a rotating movement is imparted during a rotation of the coupling shaft (27), whereby one or more of the supporting members (5) and / or the backrest (3) are actuated. Vehicle seat according to claim 1, characterized in that the coupling shaft (27) carries a first actuator (44), by means of which the front edge of the seat (1) is raised or lowered, a second actuator (50), by means of which the seat (1) rear edge is raised or lowered, a third actuator (57), by means of which the seat (1) is displaced forwards or backwards in its longitudinal direction, and a fourth actuator (63) by means of which the backrest (3) is folded forwards or backwards. 16 15 20 25 30 35 É '28 Vehicle seat according to Claim 2, characterized in that the seat (1) is raised or lowered in its entirety by means of the first actuator (HU) and the second actuator (50) in cooperation. N. Vehicle seat according to claims 2-3, characterized in that the first actuator (HH) has a first gear (46), which is connected to a corresponding gear (9) on a height-adjustable member. (8) on a front support member (5.1), that the second actuator (50) has a second gear (52), which is connected to a corresponding gear (9) on a height-adjustable member (8) on a rear support member (5.2), and that the fourth actuator (63) has a fourth gear (64), which communicates with a corresponding gear (70) on a backrest shaft (71), around which the backrest (3) ) can be turned forwards or backwards. Eordon seat according to claim H, characterized in that the third actuator (57) has a third gear (59), which is connected to a corresponding gear (21) on a drive shaft (19), which in turn communicates with a drive device (17, 22, 26), through which the seat (1) can be displaced forwards or backwards. Vehicle seat according to claim U-5, characterized in that the carrier means (H9, 56, 62, 69) are fixedly mounted on the coupling shaft (27), that the coupling shaft (27) is axially displaceable to predetermined positions, 1 which at least one carrier means (62) is in engagement with the corresponding actuator (57). Vehicle seat according to claim 6, characterized in that the respective carrier means (H9, 56, 62, 69) have external splines in relation to the coupling shaft (27), that the respective actuators (ÄH, 50, 57, 63) 16 20 25 30 35 29 new-shaped dei (145, 51, 58, 611) have the inner splines (H8, 53, 56, 61, 68), and that the splines of a carrier member (62) are inserted into the splines (61) in the sleeve-shaped part (58) when this actuator (57) is in engagement with the coupling shaft (27). Vehicle seat according to claim U-5, characterized in that the carrier means (219) are mounted on a sleeve-shaped member (218) surrounding the coupling shaft (207), that the sleeve-shaped member (218) rotatably encloses the coupling shaft (207 ), and that the sleeve-shaped member (218) is axially displaceable along the coupling shaft (207) from a free position to a first engaging position, in which the carrier means (219) are in engagement with the actuator (210, 225, 227, 229 ) and causes it to rotate in the same direction as the coupling shaft (207), or to a second engaging position, in which the carrier means (219) are in engagement with a gear (216, 217) of the actuator (210, 225, 227, 229) and causes it to rotate in the opposite direction to the coupling shaft (207).