DE1755424A1 - Seat, in particular motor vehicle seat - Google Patents

Description

The invention relates to a seat, in particular a motor vehicle seat, which is connected to the floor of the motor vehicle or the like by stilt-like connecting elements and is height-adjustable and longitudinally displaceable with respect to it, and has at least one adjusting and locking device. In a known embodiment of a seat, the seat is supported at the front and rear on staggered joint-like pick-up rods, which are adjustable in pairs by means of spindles which are guided into a spindle nuts firmly connected to the seat frame. Such seats have the advantage that their height adjustment can be carried out continuously. However, it is disadvantageous in such seats that the means required for height adjustment are both very space-consuming and very expensive. For example, such seats require a minimum distance from the floor of a motor vehicle or the like to accommodate the adjustment device.

The object of the present invention is to create seats, in particular motor vehicle seats, of the type described above, which are height-adjustable with simple and space-saving means and which can also be arranged longitudinally displaceably on the floor of a motor vehicle or the like with little effort.

According to the invention, this is essentially achieved in that at least one of the stilt-like connecting elements forms part of a locking and locking device.

This adjusting and locking device expediently consists of an internal gear rim and a spur gear engaging in it, one gear part being assigned to the seat and the other gear part being assigned to the stilt-like connecting element and the tip circle of the spur gear being at least one tooth height smaller than the root circle of the internal gear rim and one of the two toothed parts is mounted on an eccentric of an eccentric bolt that can be rotated by a handle, the eccentricity of which corresponds approximately to the difference between the root circle of the internal gear rim and the tip circle of the spur gear and this difference is dimensioned in such a way that self-locking between the internal gear rim and the spur gear is ensured. The adjusting and locking device designed in this way can be attached to the seat in a simple manner without the seat requiring more space as a result. It is therefore possible to assign to each stilt-like connecting element such an adjusting and locking device, which is used to adjust the seat height, through which the stilt-like connecting elements can be assigned, through which the stilt-like connecting elements can be swiveled steplessly and thus the seat can be moved into any inclination and height position. At the same time, this adjusting and locking device securely holds the seat in its set height position without additional locking means.

The stilt-like connecting elements and the parts of the adjusting and locking device assigned to them are advantageous here held in one piece so that transmission elements and connecting elements between the adjusting and locking device and the stilt-like connecting elements can be dispensed with. It is also advisable to provide the internal gear rim with a bridging which is integral with it, extends over its internal free space and has a bearing point. As a result, bearing plates or bearing washers can be dispensed with for mounting the eccentric bolt in the internal gear rim.

In one embodiment of the seat according to the invention, the stilt-like connecting elements can be pivoted in pairs relative to the seat. As a result, the seat adjustment can be significantly simplified, since the seat is also tilted to the side
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ten pairs are coupled to take along and a handle is assigned to an eccentric bolt. The rotary movement mediated by the handle on one eccentric bolt thus simultaneously causes a rotary movement of the other eccentric bolt. Provided that the eccentrics are aligned in the same way, there is a simultaneous movement of the seat in the same direction in every phase with respect to a pair of connecting elements. In the set positions of the adjusting and locking devices, each stilt-like connecting element of a pair is held by an adjusting and locking device.

In another embodiment, the pairs of operable connecting element pairs are assigned an adjusting and locking device, the one stilt-like connecting element forming part of the adjusting and locking device and the second stilt-like connecting element being non-rotatably connected by a transmission member to the first stilt-like connecting element or the toothing part assigned to it . The transmission member is expediently tubular and is held concentrically to the eccentric bolts of the associated pair of connecting elements on the toothing part of the adjusting and locking device assigned to the one stilt-like connecting element or on a connecting member arranged on this connecting element and rotatably mounted on the other end on a bearing pin arranged on the seat frame, wherein the second stilt-like connecting element is also non-rotatably seated on the transmission member. The eccentric movement of the toothed part mounted on the eccentric can be compensated for by the fact that it is stilted, depending on its association, with the seat frame or one of the stilts

Connecting element is connected via a pin-like projection engaging in a slot-like recess. In this way, the toothed part mounted on the eccentric can be coupled to the seat frame or the stilt-like connecting element for entrainment in the sense of rotation, without the radial movement components occurring during the eccentric movement being transmitted. A lateral inclination of the seat as a function of the movement of the part mounted on the eccentric is thus avoided. The pin-like projection is advantageously assigned to the toothed part arranged on the eccentric, and the slot-like recess is advantageously assigned to the seat frame or the stilt-like connecting element.

To achieve secure retention of the toothed parts in their intended position relative to the seat frame, especially in the area of the toothing, it is advisable to firmly connect the toothed part arranged on the concentric area of the eccentric bolt to a retaining washer on the inside of the seat frame. In an advantageous embodiment, the internal gear rim of the adjusting and locking device is assigned to the stilt-like connecting element and is mounted on the outside of the seat frame on the concentric area of the eccentric bolt, the retaining disk being firmly connected to the bridging of the internal gear rim.

In the drawing, the invention is shown in several embodiments, namely show:

1 and 2 a motor vehicle seat according to the invention in different height positions in a schematic representation,

3 shows the motor vehicle seat without backrest and without upholstery in a side view in a first embodiment,

4 shows the seat according to FIG. 3 in a partially sectioned plan view,

FIG. 5 shows an adjusting and locking device according to FIG. 4 in a view, partially in section,

6 shows an adjusting and locking device of a second embodiment of a seat according to the invention in a sectional view,

7 shows a third embodiment of a seat according to the invention in side view, partially broken away,

8 shows the seat according to FIG. 7 in a sectional front view along the line VIII-VIII,

9 shows a fourth embodiment of a seat according to the invention in side view, partially broken away, and

10 shows the seat according to FIG. 9 in a sectional front view along the line X-X.

The motor vehicle seat 20 shown in FIGS. 1 and 2 consists of a seat part 21, on the rear side of which a backrest 22 is pivotably held. The backrest 22 can be pivoted in a manner known per se. The seat part 21 is connected to the floor 25 of a motor vehicle or the like by four stilt-like connecting elements 23, 24 which are arranged laterally at the front end and the rear end of the seat part 21.

The bottom is only indicated in the drawing and can be designed in a manner known per se.

In the embodiment according to FIGS. 1 and 2, the front stilt-like connecting elements 23 can each be pivoted relative to the seat part 21 independently of the rear stilt-like connecting elements 24. By pivoting the stilt-like connecting elements 23, 24, the height and / or inclination of the seat 20 relative to the floor 25 is adjusted Sliding body 27 slidably held on the bottom 25 ends inclined towards the center of the seat. The seat 20 is set lower than the position in FIG. 1,
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In order to achieve a lower seat position, the stilt-like connecting elements can also be pivoted outwards with respect to the seat, as shown in particular in FIG. 3. To change the inclination of the seat part 21 relative to the floor 25, the front pair of stilt-like connecting elements 23 or the rear pair of stilt-like connecting elements 24 can also be adjusted separately from one another.

The pivoting of the stilt-like connecting elements 23, 24 takes place by adjusting and locking devices 28, one part of which is assigned to the seat frame 29 of the seat part 21 and the other part of which is assigned to one of the stilt-like connecting elements 23, 24. The ends of the stilt-like ends associated with the floor 25

Connecting elements carry rotatably arranged sliding bodies 27 which, in a lateral arrangement, engage in the guide rails 26 associated with the floor and are guided by these in a displaceable manner in the longitudinal direction of the seat. As FIG. 3 in particular shows, the sliding bodies 27 are rotatably held by connecting bolts 30 at the lower ends of the stilt-like connecting elements 23, 24. The connecting bolts 30 sit on locks 32 which, under spring load, engage with locking lugs 33 in recesses 34 of an angled portion 35 of the U-shaped guide rails 26 and can be moved into the open position by actuating one of their arms designed as an actuating member. In the embodiment shown in FIGS. 3 and 4, a front stilt-like connecting element 23 and a rear stilt-like connecting element 24 are provided with a catch 32, which can be moved into their open position independently of one another.

In the embodiment shown in FIGS. 3 and 4, the adjusting and locking devices 28 essentially consist of a spur gear 36 and an internal gear rim 37, each of which is seated on an eccentric bolt 38 which can be rotated by a handle 39. In this case, the internal gear rims 37 are provided with a bridging 40 which is integral with them and extends over their internal free space. At the same time, the stilt-like connecting elements 23, 24 are held in one piece with the internal gear rims. The arrangement and design of the front adjusting and locking device is not shown in greater detail in FIG is equivalent to. With the bridging 40, the internal gear rims are mounted on eccentrics 41 of the eccentric bolts 38, while the spur gears 36 sit on concentric areas 42 of the eccentric bolts 38. The spur gears 36 are provided with approximately oval edge projections 43 associated with them in one piece, which have through-openings 44 for push-outs 46 having fastening screws 45. The spur gears 36 are fastened to the seat frame 27 of the motor vehicle seat 20 by the edge projections 43. For this purpose, the fastening screws 45 are screwed into the nuts 47 assigned on the inside of the seat frame 27.

The tip circle of the spur gears 36 is kept at least one tooth height smaller than the root circle of the internal gear rims 37, the number of teeth of the spur gears differing from those of the internal gear rims by at least one tooth. At the same time, the eccentricity of the eccentrics 41 with respect to the concentric areas 42 of the eccentric bolts 38 is dimensioned such that self-locking occurs between the internal gear rings and the spur gears. When the eccentric bolts are rotated by means of a handle 39, the internal gear rims roll on the spur gears 36, describing an eccentric path. A movement of the internal gear rims 37 with respect to the spur gears 36 is only possible by rotating the eccentric pin 38.

In the embodiment shown in FIG. 4, the adjusting and locking devices are the front stilt-like connecting elements 23 and the rear stilt-like connecting elements

A handle 39 is assigned to each 24. The handle 39 sits on one eccentric bolt of the respective connecting element pair in a rotationally fixed manner. The eccentric bolts of the locking and locking devices belonging to a pair of connecting elements are held by a transmission rod 50, which are held non-rotatably at both ends in a hollow space of socket bolts 51 which is open at the end.

The socket pins 51 for their part abut the eccentric pins 38 on the end face with a collar 52 and are held in a rotationally fixed and axially immovable manner by pins 53 in the concentric openings 54 of the eccentric pins 38. The transmission rods 50 and the parts of the socket pins 51 located outside the eccentric bolts are surrounded by a jacket tube 55 which is firmly connected to the seat frame. It should also be mentioned that the eccentric bolt rotatable by the transmission rod 50 is seated on the circumference inwardly cranked disk 56, which serves to hold the internal gear rim seated on the associated eccentric in the axial direction.

The internal gear rim of the adjusting and locking device according to FIG. 4 with the bridging covering the inner free space takes place in one operation by combined free punching and extrusion, in which the internal gear rim is simultaneously formed and the bridging is pressed out of the material. Both unalloyed steels according to DIN 1624 and alloyed steels according to DIN 17200, whose tensile strength values are between 50 kg / mmhigh2 and 65 kg / mmhigh2, are used as the starting material. In particular, when using alloyed steels, the starting material is normalized beforehand by heat treatment in order to achieve a formation of the graphite components into spheroidal graphite, which improves the lubricity of the metal crystals.

The starting material is deformed on a free punching press between a die and a die, the die being pressed into the material held on the die. Both the male part and the female part are provided on their outer or inner circumference with a shape corresponding to the tooth shape of the internal gear rim. The production takes place in three working sub-processes. First, the starting material is brought into firm contact with the die by a hold-down device controlled by the male mold. In a second partial working process, a pre-deformation increasing the material concentration in the deformation areas takes place in cooperation with a counter-holder assigned to the die. In a third partial working process, the internal gear rim is then formed while the bridging is pushed out at the same time.

In order to obtain a connecting web between the bridge and the spur gear that satisfies the strength requirements, precise control of the penetration depth of the male part into the material is necessary. It should also be added that necessary recesses, such as those for mounting an eccentric bolt to be described, as well as fastening holes can be produced in the same operation. The spur gear with its one-piece edge projection is manufactured in the same way as the internal gear rim with the bridging.

6 shows a second embodiment of an adjusting and locking device 59 in which a stilt-like connecting element 23 is assigned to a spur gear 60, which is, however, formed separately from the stilt-like connecting element and is arranged lying next to it on a toothed ring 61. It should be added at this point that in this and the following embodiments, the same reference numerals have been retained for the parts that have not been changed from the first embodiment. The ring gear 61 is in turn mounted on the eccentric 62 of an eccentric bolt 63 and is used for the rotationally fixed connection between the spur gear 60 and the stilt-like connecting element 23 , which is mounted on a concentric area 68 of the eccentric bolt 63. Outside the pivoting range of the stilt-like connecting element 23, the longer rivets 65 serve both to hold the internal gear ring 64 on the seat frame 29 and to hold a retaining disk 69 on the inside of the seat frame resting against the stilt-like connecting element 23 which, as in the previously described embodiment example, serves to connect to a second eccentric pin not shown. The mode of operation of this adjusting and locking device corresponds to that of the previously described embodiment with the difference that here the spur gear 60 moves on an eccentric path. However, it should already be mentioned that with In both exemplary embodiments, the respective other toothed part can also be assigned to the eccentric.

In the further exemplary embodiments shown in FIGS. 7 to 10, only one adjusting and locking device is assigned to two stilt-like connecting elements. The embodiment shown in FIGS. 7 and 8 has an adjusting and locking device 70 with a base plate 71 which is fastened to the seat frame 29. An internal ring gear 78 is held in one piece with a stilt-like connecting element 24 and is mounted on a concentric region of an eccentric bolt 74 with the bridging 73 that is integral with it. The spur gear 76 is mounted on the eccentric part of the eccentric bolt 74 and carries a pin 78 on an edge projection 77 that is integral with it and protrudes into a slot-like recess 79 in the base plate 71. The slot-like recess 79 extends radially to the eccentric bolt 74. A tubular transmission member 80 is attached to the internal gear rim 72 on the side facing away from the spur gear 76. At its other end, the tubular transmission member 80 is rotatably mounted on a bearing pin 81 permanently assigned to the seat frame 27. The second stilt-like connecting element 24 of the pair of connecting elements is placed on the tubular transmission member 80 and connected to it in a rotationally fixed manner.

It remains to be mentioned that the eccentric bolt 74 is seated on a fastening disk 82 which is used to hold the connecting parts firmly on the eccentric bolt. Furthermore is a
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Retaining disk 83 is firmly connected to the bridging 73 of the internal gear ring 72, for example by welding. The ring-shaped retaining disk 83 rests on the inside of the base plate 71 and thereby holds the internal gear rim in its predetermined position in the toothed area without hindering its rotation relative to the base plate and thus the seat frame 27.

When the eccentric bolt rotates and the sliding bodies 27 are fixed in their guide rails, the spur gear 76 rolls on the inner ring gear 72, its rotational movement being transmitted via the pin 78 and the slot-like recess 79 to the base plate 71 and thus the seat frame 27 and into a transferred to another position. The eccentric movement of the spur gear 76, however, is not transferred to the base plate, since the pin 78 can move freely in the slot-like recess 79 in its longitudinal direction. Due to the arrangement of the second stilt-like connecting element 24 on the tubular transmission member 80 and its mounting on the bearing pin 81, only one adjusting and locking device is required to change the position of a pair of connecting elements relative to the seat frame and thus effect a height adjustment of the front or rear seat part . When the adjusting and locking device of the other pair of connecting elements is actuated in the same direction, the height of the seat as a whole can of course also be adjusted.

The embodiment shown in FIGS. 9 and 10 corresponds essentially to the embodiment described above, but the adjusting and locking device is designed similarly to that in the embodiment according to FIG. Here, a spur gear 84 is again mounted on the eccentric 85 of an eccentric bolt 86, while the internal gear rim 87 cooperating with the spur gear 84 is connected to a bearing disk 88 which is seated in a concentric area of the eccentric bolt 86. The internal ring gear 87 and the bearing washer 88 are firmly connected to a base plate 89, which in turn is held on the seat frame 29. In contrast to the exemplary embodiment according to FIG. 6, however, the connection between the spur gear 84 and the one stilt-like connecting element 24 is made by a pin 90 of the spur gear 84, which engages in a slot-like recess 91 of the one stilt-like connecting element 24. Furthermore, this stilt-like connecting element 24 is connected via a fastening bolt 92 to an arm 93, which is also mounted on the eccentric bolt 86 and on which the tubular transmission member 80 rests, which at its other end carries a second stilt-like connecting element 24 in a rotationally fixed manner and on a bearing bolt 95 of the seat frame 27 is stored. When the eccentric bolt 86 is rotated by means of the handle 39, the spur gear 84 is moved on an eccentric path by the eccentric 85 and rolls off the internal gear rim 87 in the process. During this movement of the spur gear 84, the pin 90 takes along the stilt-like connecting element. The stilt-like connecting element only performs a circular arc-shaped movement around the axis of the eccentric bolt 86, since the movement component of the spur gear 84 in the radial direction, due to the eccentric path, is not transmitted to the stilt-like connecting element. because the pin 90 can be moved freely in the radial direction in the slot-like recess 91.

It should also be mentioned that a retaining disk 94 is fastened to the base plate 89, resting on the inside. The retaining disk 94 is seated at the same time on the eccentric bolt 86 and serves to secure the position of the spur gear 84 and the stilt-like connecting element 84 associated therewith on the eccentric bolt 86 and opposite the base plate 89.

As already mentioned, the illustrated embodiment is only an example implementation of the invention and this is not limited to it; rather, various changes and other designs are possible. As already mentioned, either the spur gear or the internal gear rim can be mounted on the eccentric of the eccentric bolt. Furthermore, the internal gear rim or the spur gear can optionally be assigned to the stilt-like connecting elements, in which case the respective other toothed part is then assigned to the seat frame at the same time. It is also possible to assign an independently actuatable adjusting and locking device to each stilt-like connecting element. Furthermore, the seat height adjustment can also be used for seats with more or less than four, for example three, stilt-like connecting elements. The use of the seat height adjustment device according to the invention is not limited to motor vehicle seats, but is particularly suitable for motor vehicle seats because of its small dimensions and ease of use, as well as the possibility of being able to adjust the individual stilt-like connecting elements separately from one another.

Claims (13)

1. Seat, in particular a motor vehicle seat, which is connected to the floor of the motor vehicle or the like by stilt-like connecting elements and is height-adjustable and longitudinally displaceable with respect to this, and has at least one adjusting and locking device, characterized in that at least one of the stilt-like Connecting elements (23, 24) form part of an adjusting and locking device (28; 59; 70; 83). 2. Seat according to claim 1, characterized in that the adjusting and locking device (28; 59; 70; 83) consists of an internal gear rim (37; 64; 72; 87) and a spur gear (36; 60; 76; 84), one toothing part being assigned to the seat (20) and the other toothing part being assigned to the stilt-like connecting element (23, 24) and the tip circle of the spur gear (36; 60; 76; 84) being at least one tooth height smaller than the root circle of the internal gear rim (37; 64; 72; 87) and one of the two toothed parts is mounted on an eccentric (41; 62; 75; 85) of an eccentric bolt (38; 63; 74; 86) rotatable by a handle (39), the Eccentricity roughly corresponds to the difference between the root circle of the internal gear rim (37; 64; 72; 87) and the tip circle of the spur gear (36; 60; 76; 84) and this difference is dimensioned such that self-locking between the internal gear rim (37; 64 ; 72; 87) and the spur gear (36; 60; 76; 84) is guaranteed. 3. Seat according to claim 1 or 2, characterized in that the stilt-like connecting element (23, 24) and the part of the adjusting and locking device (28; 70) assigned to it are held in one piece. 4. Seat according to claim 2, characterized in that the internal gear rim (37; 72) is provided with a bridging (40; 73) which is integral with it, crosses its inner free space and has a bearing point. 5. Seat according to one or more of claims 1 to 4, characterized in that the stilt-like connecting elements (23, 24) are pivotable in pairs relative to the seat (20). 6. Seat according to claim 5, characterized in that one of the jointly actuatable connecting elements (23, 24) can be fixed in a longitudinal guide (26). 7. Seat according to claim 5, characterized in that each stilt-like connecting element (23, 24) is assigned an adjusting and locking device (28; 59), the eccentric bolts (38; 63) of the connecting element pairs (23, 24) receiving the toothing parts. are coupled to drive and a handle (39) is assigned to one eccentric bolt (38; 63). 8. Seat according to claim 5, characterized in that the stilt-like connecting elements (23, 24) which can be operated in pairs are assigned an adjusting and locking device (70; 83), the one stilt-like connecting element being part of the adjusting and locking device (70; 83) and the second stilt-like connecting element is non-rotatably connected by a transmission member (80) to the third stilt-like connecting element or the toothed part assigned to it. 9. Seat according to claim 8, characterized in that the transmission member (80) is tubular and concentric to the eccentric bolts (74; 86) of the associated pair of connecting elements (23, 24) on the toothed part of the adjusting and locking device assigned to the one stilt-like connecting element ( 70; 83) or is held non-rotatably on a connecting member (23) arranged on this connecting element and is rotatably mounted at the other end on a bearing pin (81; 95) of the seat frame (29), the second stilt-like connecting element being non-rotatably seated on the transmission member (80). 10. Seat according to claim 9, characterized in that the toothed part mounted on the eccentric (75; 85) with the seat frame (29) or the one stilt-like connecting element (23, 24) via a slot-like radially to the eccentric bolt (74 ; 86) extending recess (70; 91) engaging pin-like projection (78; 90) is connected. 11. Seat according to claim 10, characterized in that the pin-like projection (78; 90) the toothed part mounted on the eccentric (73; 85) and the slot-like recess (70; 91) the seat frame (29) or the stilt-like connecting element (23 , 24) is assigned. 12. Seat according to claim 10 or 11, characterized in that the toothed part mounted in the concentric region of the eccentric bolt (74; 86) is connected to a retaining disk (82; 94) resting on the inside of the seat frame (29). 13. Seat according to claim 12, characterized in that the internal gear rim (72) of the adjusting and locking device (70) is assigned to the stilt-like connecting element (23, 24) and the seat frame (29) on the outside resting on the concentric area of the eccentric bolt (74) is mounted, the retaining disk (82) being firmly connected to the bridging (73) of the internal gear rim (72).