MXPA00009790A - Spindle or worm drive for adjusting devices in motor vehicles - Google Patents

Abstract

The invention relates to a spindle or worm drive for adjusting devices, especially seat adjustment devices, window lifters and sliding roofs, in motor vehicles. The inventive drive consists of a fixed spindle or relatively fixed toothed rack which is secured to the first of two parts that can be adjusted in relation to each other and to a gear which is secured to the second of said two parts. The gear elements (91;92;92') are mounted in a housing (7) which consists of at least two plates (71a;71b;72a;72b) that can be secured to each other by means of plug-type connectors. Said connectors are also configured as supporting joints that absorb the forces of the gear.

Description

SPINDLE DRIVE UNIT OR TQRNILLQ S INFIN FOR MOTOR VEHICLE ADJUSTMENT DEVICES DESCRIPTION __ ». - The invention relates to a spindle or worm drive unit for adjusting devices in motor vehicles according to the preamble of claim 1. From DE OS 17 55 740 a spindle drive unit for a motor is known for an adjustment device, in a motor vehicle seat. The vehicle seat is fixed here on two parallel sliding rails that run on guide rails mounted on the floor of the vehicle. A threaded spindle is mounted parallel to each sliding rail and connected rotationally secured thereto. Next to the locally fixed guide rails and fixedly connected thereto is a gear block which retains a spindle nut mounted on the threaded spindle, as well as a drive worm which meshes with the nut. The drive augers of each gear block are connected to a common drive motor. The gear block consists of two parts that are screwed together. If the drive motor is driven then the spindle nuts are rotated through the drive augers. Since the threaded spindle is mounted in a rotationally secured manner the threaded spindle and the vehicle seat connected thereto move relative to the gear block and thus to the floor of the vehicle. The disadvantage with this solution is that the gear block is expensive to manufacture. The gear block itself is too large so that it can not be mounted, for example, inside the rails. From DE 40 21 669 A1 a housing is known for an auxiliary, electric drive unit having two half-shells which are held together by means of elastic stop elements. From DE 43 24 913 Cl there is known a housing for an electric servo-drive unit consisting of a housing shell and a housing cover which on one side are connected together by snap-fit, elastic elements and on the other hand they support each other through additional support areas. From DE 30 0'7 102, a device for changing the inclination of the slats of a slat screen is known, and has a rotatable drive shaft, an endless screw mounted on the drive shaft, a rotating wheel, worm screw that engages the auger, an integral housing with two housing portions formed symmetrically on the mirror, a fixed articulated joint that connects the housing portions together so that they can be moved between an opening position and a closing position, 1 two bearing portions in each housing part forming a bearing for the drive shaft and the worm, as well as a bearing each as a support bearing for the worm wheel in the position cexrada of the housing parts; and a device that fixes the secure housing position in its closed position. This device comprises an L-shaped holding yoke which is connected to the two housing parts by means of a holding bolt and two plug-type connectors. The plug type connectors. this mode serves to fix the housing parts in a plane and the clamping bolt serves to fix them perpendicular to them. The object of the invention is to develop a gear housing for a worm screw drive unit for adjustment devices in motor vehicles that are profitable to manufacture and simple to adjust. The gear housing must be small and compact and thus allow installation inside the rails while at the same time it must be ensured that in the event that the gear is blocked, the vehicle seat can still be move to a position where it can be dismantled. This is achieved since the engaging elements are mounted in a gear housing consisting of at least two housing plates which are fixed against each other through plug-type connectors wherein the plug-type connectors serve at the same time as connection unions. connection of support that absorb the forces of the gears and for this purpose will be designed in a correspondingly rigid manner. A gear element formed as a threaded spindle is thus retained in accordance with claims 34 to 42 in at least one carrier preferably by at least one ideal breaking point., and at least one end of the threaded spindle is formed as a positive clamping element that can be connected to a turning tool in order to overcome the ideal breaking point for emergency activation purposes. The advantage of the invention is that the size of the gear can be significantly reduced in comparison with similar gears since the plug-type connectors which serve to fix the individual housing parts are also at the same time suitable for taking up the forces of the In this way, the use of the gear according to the invention is also possible for motor vehicle seats where the actual seat is mounted on very narrow rails, and / or the possibility exists of changing with respect to guides of narrow rails In a preferred embodiment of the invention, it is proposed to fix the position of the receiving plates in relation to each other in all three dimensional directions through the plug-type connectors. for example when delimiting the material in the area of plug-type connectors, by laser welding or by casting the connectors It is plug type and when attaching the connectors. Additional features of this can be derived from claims 27 to 33 which relate to a process for mounting the gear housing. Additionally, it is advantageous if the housing plates are fixed against each other only in the plug-type connectors. This produces, with the minimum of expense, a support connection between the individual housing parts; it is not necessary to provide separate fastening means on one side and on the other hand support areas which serve to absorb the forces of gears. Gear production is also possible using a small number of parts. Manufacturing costs are reduced since housing parts and tools can be manufactured in a cost-effective manner. After mounting the housing, it is not necessary to terminate the housing plates. The possibilities for the use of the gear are extended. Particularly, due to its size and low weight, it can be used for drive units where the use of these gears was not possible until now. The invention will now be explained in further detail with reference to the embodiments shown in the drawings in which: Figure 1 shows a perspective illustration of a spindle drive unit (showing one side of the vehicle seat bearing); Figure 2 shows a threaded spindle with the gear including the carrier; Figure 3 shows a carrier for a gear; Figure 4 shows an explosive view of the gear including the carrier; Figure 5 shows the gear in the assembled state; Figure 6 shows xpxa "bearing plate with the bearing hole for the auger; Figure 7 shows a bearing plate with the bearing hole for the spindle nut; L shape; Figure 9 shows a U-shaped housing plate in conjunction with a disc-type housing plate, Figure 10 shows the-threaded spindle bearing with a compressible threaded element as an anti-rotation lock and for the emergency operation; Figure 11 shows the threaded spindle bearing with a compressible passage, Figure 12 shows the threaded spindle bearing with a threaded element tensioned by a locknut as the anti-rotation lock, Figure 13 shows the spindle bearing threaded with a nut fixed in its position that is tightened in the threaded spindle through a locknut; Figure 14 shows the bearing of the threaded spindle with a safety lock nti-rotation of plastic; Figure 15 shows a sectional view of Figure 14; Figure 16 shows a safe anti-rotation of the threaded spindle with a plastic lock; Figure 17 shows the anti-rotation insurance of the threaded spindle through a locknut welded with a distance sleeve; Figure 18 shows the main sketch of an adjustment drive unit with a toothed shelf; and Figure 19 shows a screw drive unit for a window lifter.

As can be seen from Figure 1, a retaining plate 1 is associated with an upper rail 3. The retaining plate 1 is provided with holding brackets lla, 11b for the driving motor 2 so that the motor 2 The drive frame is connected in a fixed manner to the retaining plate 1 and is thus fixed to the upper rail 3. The upper frame of the vehicle seat (not shown in detail here) is fixed to the upper rail 3. The trees 21 and 22 of drive are mounted on either side in drive motor 2. Preferably, fl exible shafts are used. These drive shafts 21, 22 produce the connection with a gear 9, the position, construction and operation of which will be described in detail further. The upper rail 3 slides directly or through displacement and / or bearing elements (not shown) into a bottom rail 4 which is fixed to the floor of the vehicle. In the operating position of the upper rail 3 and the bottom rail 4 these rails are retained by their contact and / or bearing areas so that a hollow cavity 31 is produced. A threaded spindle 5 is mounted within this hollow cavity 31 where it fits between carriers 6a and 6b that are mounted fixed to the bottom rail 4. The connection between the carriers 6a, 6b occurs through fastening nuts 6c, 6d, 6c ', 6d'. The threaded spindle 5 interacts with the gear 9 which is likewise mounted in the hollow cavity 31 and is locally fixed in the upper rail 3. This arrangement is shown in Figure 2. The gear 9 is retained in a carrier 8 in the form of U which is fixedly connected to the upper rail 3 (not shown here). The decoupling elements 10a, 10b are inserted between the arms 86a, 86b of the carriers 8 and the gear 9 in order to eliminate any noise and compensate the tolerances. In a further design of the gear bearing 9, it is provided in the upper rail 3 through an extended carrier 8 '. This carrier is shown in Figure 3. The gear 9 (not shown here) is mounted similar to the manner shown in Figure 2 in the gear mounting portion 81 of the carrier 8 '. The arms 82a; 82b of the carrier 8 'are fixed to the upper rail 3. In this embodiment, these are screwed into the upper rail 3. For this reason, the arms 82a; 82b have gripping openings 83 corresponding to the gripping openings 30 in the upper rail 3 shown in Figure 1. The gripping openings 83 are associated with welded nuts 84, that is nuts 84 weld in the openings. The welded nuts 84 thus point in the direction of the hollow cavity 31. Instead of the welded nuts 84 it is also possible to use unit nuts or stamped nuts. Another possibility is to create passages instead of using nuts, and provide these with an internal thread. It is also possible to use combinations of designs described above. The connection or screwing of the carrier 8 'to the upper rail 3 improves its rigidity. Through the arrangement of the soldered nuts 84 or passage mentioned above, it is possible to assemble or assemble the complete gear 9 with its carrier 8 'in advance and then slide this unit towards the hollow cavity 31 of the guide 3; 4 of rail -.- that is already adjusted. The upper rail 3 can then be screwed to the carrier 8 'through the holding openings 83. The carriers 8, 8 'have in an additional embodiment areas 87a, 87b of ideal deformation which are arranged between the arms 86a, 86b of the engagement carrier 81 and the arms 82a, 82b of the carrier 82a, 82b. These ideal deformation areas 87a, 87b can in the simplest design be dimensioned correspondingly as welded seams. However, it is also possible to use ideal deformation areas 87a, 87b, angles or other profiles at this point. All these elements are dimensioned so that they only occur when a predetermined ideal stress is applied and then only the arm 86a is deformed, 86b or the gear socket 81. This then occurs so that when a predetermined maximum limit force is exceeded, the arms 86a, 86b rotate laterally and thus secure the threaded spindle 5. In the case of a collision this helps to provide additional safety for the vehicle seat . The two arms 82a, 82b of the carrier 8 'are at an angle and have in the angled areas 85a, 85b a wider material that substantially fills the hollow cavity 31. The rigidity of the rail guide, ie its resistance to Flexing can be improved in this way. The coupling with hook between the upper rail 3 and the bottom rail 4 remains secure. The holes 88a, 88b provided in the arms 82a, 82b serve to center the carrier 8 'relative to the upper rail 3, for example through blind rivets (not shown here). The passages 89a, 89b formed in the arms 86a, 86b increase the critical cross section of the retention angle 8 'and help securely transfer the forces in the event of a collision. As can be seen from FIG. 4, the gear 9 consists of a worm gear 91 that engages with a nut 92 spindle through the external gear 92 'of the worm. The drive auger 91 is connected to the drive motor 1 through the drive shaft 21, 22 (see in the present Figure 1). The spindle nut 92 is associated with the threaded spindle 5 through its internal thread. With reference to the method of operation of the device: If the drive motor 2 rotates then it transfers its movement through the drive shaft 21, 22 to the driving screw-inflow 91. It transfers its rotary movement to the spindle nut 92. Since the scraped spindle is secured against rotation, the gear 9 and thus the upper rail 3 connected thereto, and including the vehicle seat, have to execute a translation movement (see here Figure 1). Figure 4 shows an explosive view of the construction of the gear 9. It can be seen that the meshing elements, consisting of a worm gear 91 and a spindle nut 92 are mounted on the plates 71a, 71b, 72a, 72b of accommodation, of a housing 7. of gears. Figure 5 shows the gear 9 in the assembled state. As it can be seen that the auger 91 is mounted on the bearing plate 71a and 71b through the bearing holes 73a and 73b while the spindle nut 92 is mounted on the bearing holes 74a and 74b of the bearing. housing plates 72a and 72b. Discs 95 and 96 are provided for the axial run of the spindle nut 92 and the drive auger 91 while the disks 95 ', 96' of the shaft serve to compensate for the axial clearance. From Figures 6, 7, 8 and 9 a possible construction of the gear housing 7 according to the invention can be seen. As can be seen from Figures 5 to 7, the gear housing consists here of two plates 71a, 71b; 72a, 72b of housing, disc type, opposite where the housing plates in the individual illustration according to Figures 6 and 7 are each provided with reference numbers 71 and 72. The housing plates 71a; 71b; 72a; 72b are preferably made from a sintered material. However, they can also be made from other materials, such as casting materials, steel or even plastic. The housing plates 71, 71b, 72a, 72b are manufactured to their final dimensions. This also relates to the bearing holes 73a, 73b, 74a, 74b, their position in the housing plates 71a, 71b, 72a, 72b - and also to their tolerances. The opposing housing plates 71a, 72b and 72a, 72b correspondingly of an identical design. Thus, a pair, in the embodiment herein, the housing plates 72a, 72b, have areas formed as frames 76 that are arranged at the edges of the housing plates 72a, 72b, thus extending as far as possible. along the plane of the housing plates 72a, 72b. Opposite sides 761, 761 'of the frames 76 are aligned either parallel, running conical or have scraper ribs. Corresponding depressions 75 formed as full length passage openings are arranged in the edge areas of the housing plates 71a, 71b transverse to the plane of the housing plates 71a, 71b. These depressions 75 have surfaces 752, 752 'parallel to the sides 761, 761' of the frames 76. Other possible embodiments of the receiving plates are shown in Figures 8 and 9. These are on the one hand two L-shaped housing plates 77a, 77b. These L-shaped housing plates 77a, 77b support on one of their arms the frames 76 'corresponding to the depressions 75' similar to the mode described above. The corresponding bearing holes 73 'and 74' are, as already described above, formed in the alloy plates. Figure 9 shows a gear housing consisting of a U-shaped housing plate 78 and a disk-like housing plate 79 associated therewith. The arms of the U-shaped receiving plate 78 also support the frames 76"which engage in the corresponding depressions 75" of the disk-like receiving plate 79. For assembly, the frames 76, 76 ', 76"are pushed towards the depressions 75, 75', 75". The dimensions of the depressions 75, 75 ', 75' 'and the frames 76', 76 ', 76' 'are coupled to each other so that after the assembly process, either gaming accessories or adjustment accessories can be formed. Pressure. After assembly, the position of the depressions 75 and of the frames 76 and thus the position of the driving auger 91 relative to the spindle nut 92 are fixed and finally ensured by plastic deformation of the material in the area of plug type connections. The adjustment of the engagement housing 7 can be assisted or completely replaced by automatic sequences. Now this will be explained below with reference to the disc-like plates 71a, 71b, 72a, 72b. The assembly of the L-shaped housing plates 77 and the U-shaped housing plates 78 and 79 is carried out in a similar manner. For this purpose, the meshing elements (auger screws 91, spindle nut 92, disks 95, 96, discs 95 ', 96' of shaft) including the housing (housing plate 71, 72) are all pre- assembled This means that the engaging elements are inserted into the bearing holes provided for this purpose and the housing plates 71, 72 are pushed together. This pre-assembled gear 9 is now inserted in a combined restraining and limiting device that retains the gear 9 around its outer contour. The support is provided in the plane direction of the plates 72a72b, wherein the retaining forces engaging the four corners of the housing plate 71a or 71b are kept relatively small. The gear 9 now moves, preferably when rotating the drive worm 92. At least you have to make a revolution. The housing plates 71a, 71b, 72a, 72b in this manner can be tension-free aligned. After completion of this movement, the holding forces are intensified so that the engagement elements 91, 92 and the receiving plates 71a, 71b, 72a, 72b are held in this position and prevented from slipping. A delimiting tool now engages in the area of the plug-type connections, that is at the points of contact between the frames 76, 76 'and 76"and the depressions 75, 75' and 75" and then deforms the material in a plastic way in these points. The deformation is carried out in such a way that the material forms scour sections as an example and in this way finally fixes the position of the plates 71 a, 71 b, 72 a, 72 b in relation to one another. In order to prevent deformation of the bearing holes 74a, 74b of the spindle nut 92, the delimitation is not carried out over the entire length of the plug-type connections. The delimitation is only undertaken in the area where the influence of the forces in the bearing area of the spindle nut 92 in the housing plate 72 and in this way the deformation of the bearing holes 74 can be eliminated. The fixing of the housing plates 71a, 71b, 72a, 72b can also be carried out by welding the material in the area of the plug-type connections through the use of laser technology. A further possibility is in fixing the position of the receiving plates 71, 72 relative to each other when molding the material in the area of the plug-type connections. Another development of the process is in rotating the meshing elements at a higher speed for the purpose of alignment. It is convenient to work with the nominal speed or with a speed of the gear that is faster than this one. The rotating forces produced in this way maintain the position of the stationary engagement elements 91, 92 in relation to each other during movement, so that the position is fixed during movement. The bearing of the threaded spindle 5 can also be designed so that the carriers 6a, 6b (see Figure 2) of the threaded spring 5 are associated with sleeves (not shown here) of vibration damping or similar structural elements. Obviously, the construction of the plug-type connectors is not restricted to the variations illustrated in Figures 5 to 9. In this manner, plug-type connectors can be formed by pins or bolts that are provided in one of the housing portions that are they will connect and engage in a corresponding depression of the other part, or through a tongue or groove connection in which to produce the positive coupling or a forced, round fastening coupling, a glue-shaped groove is particularly suitable Swallow or a T-shaped slot, although a U-shaped slot or similar can also be included. Additionally, several positive retention slide connections are also possible. One design of the invention consists in providing the threaded spindle bearing 5 with emergency activation. This is required to allow the threaded spindle 5 not to turn in the event of a defect in the gear 9. The vehicle seat can thus also be moved in this case which is necessary if it is to be dismantled since the connection of screw between the carrier 6a, 6b and the bottom rail 4 can be covered by the top rail 3. If it is necessary to undo the screw connection then the top rail 3 has to be moved relative to the bottom rail 4. For this, it is proposed to provide the threaded spindle bearing in at least one carrier 6a, 6b with an ideal breaking point and to provide the threaded spindle 5 on at least one end with a positive retention element 52 which can be gripped and rotated by a tool when needed. These designs are shown in Figures 10 to 17. Figure 10 shows a design where for example a threaded element 60 is used having on its circumference an area of weakened material such as a circumferential groove 61. However, other types are also possible of areas of weakened material, such as for example notches or the like. The threaded element 60 is welded to one of the carriers 6a, 6b. In order to form an ideal breaking point, the material is crushed with the threaded spindle 5 in the area of the slot 61. This takes place in two opposite coupling points (see arrow) whereby it is also possible to crush the material in one side only. In the case of an emergency operation, the threaded spindle 5 is rotated and the retention force of the compressed material is exceeded. Welded, stamped or laminated metal nuts can be used as the threaded elements 60, producing the material or clamping connections forcefully with the material. In Figure 11 a simple variation is shown. Instead of a threaded element 60, a passage 60 occurs in the carrier 6a, 6b and is provided with a thread for retaining the threaded spindle 5. The passage 62 is compressed with the spindle 5 threaded (see arrow). Figure 12 shows a solution in which a threaded element 60 'is welded to the carrier-5a, 5b, similar to the variation illustrated in Figure 10. This threaded member 60' is tensioned by a lock nut 63. In the case of a emergency operation, the lock nut 63 can be loosened and in this way the threaded spindle 5 can be rotated. Figure 13 shows a similar solution. However, a nut 64 is not welded here to the carrier 6a, 6b but is retained in a key connection through a stop 6e which is attached to the carrier 6a, 6b. The tension is also produced by a locknut 63. As an ideal breaking point, a welded point 60a is provided between the nut 64 and the threaded spindle 5. Figures 14 and 15 show a solution in which a plate is provided 65, which has a support 65a that secures a nut 64 'in its arranged position between the carrier 6a and the security plate 65. As an ideal breaking point, an anti-rotation lock 66 is provided, preferably made of plastic . This is inserted with its outer contour into the key connection in a threaded spindle receiving hole 65b of the security plate 65. The key connection here is produced through at least one positive clamping element 66a molded on the circumference of the anti-rotation lock 66 and corresponding to a coupling depression 65c in the threaded spindle receiving hole 65b. The anti-rotation lock 66a is connected rotationally secured to the threaded spindle 5 as a square edge or other geometrically designed element at the end of the threaded spindle 5 engages a corresponding internal contour 66b of the anti-rotation lock. In the case of the emergency operation of the threaded spindle 5, which includes the anti-rotation lock 66, it rotates which leads to the destruction of the anti-rotation safety 66. The threaded spindle 5 can be moved from this moxlo. Figure 16 shows a -different possibility of using the plastic anti-rotation fastening element. Here, a plastic security member 67a is formed in a receiving aperture of the threaded spindle of the two carriers 6a, 6b so that the round, circular cross-section of the receiving aperture 67 remains, while the width b, of the plastic safety member is, however, larger than the diameter d of the receiving opening 67. The compression and thus the design of the ideal break point is through forces in the direction of the arrows. In this way the possibility is provided that the threaded spindle 5 transfers the forces of both tension and compression as long as it is also secured against rotation. In the case of an emergency operation, the plastic safety member 67a is forced so that the threaded spindle 5 can escape into the space that becomes available or, if necessary, can be forced into this space by means of a tool (not shown in this ). In this way, the threaded spindle 5 becomes free and the vehicle seat can be removed without having to turn the threaded spindle 5. In Figure 17, a special locknut 68 is shown which is similar to the example described with reference to Figure 10, it is welded to a carrier 6a, 6b and has a circumferential groove 61 'as the area of weakened material. The compression on the threaded spindle 5 and the emergency operation takes place in a manner similar to the example of Figure 10. ~ In this example, however, a sleeve 69 is mounted away on the special jam nut 68 on the side away from the nuts. carriers 6a, 6b and restricts the travel path of the top rail 3 in the bottom rail 4.

An end stop, variable for example, can be achieved through plastic clips (not shown here), which are fixed separately on the threaded spindle as the vehicle seat is adjusted. In order to be able to execute the emergency operation described above (with the exception of the example described in relation to Figure 16) in order to rotate the threaded spindle 5, its end has to be held by a tool. For this purpose, the end of the threaded spindle 5 has to be provided with a suitably designed positive clamping element 52. This can be achieved for example by flattening the same on one or both sides or by providing a shape of several edges, internal or external, for example a square edge. The use of the gear according to the invention, described above, is not only restricted to the operation of the threaded spindle 5. The use of a toothed rack is also possible. Figure 18 schematically shows the arrangement of a device of this kind that is mounted within the gear housing 7 according to the invention. The drive auger 91 'is thus coupled to a worm wheel 93 which is axially connected to the auger 94. The auger 94 engages the teeth of a toothed rack 51. Through the rotary movement of the drive motor (not shown here) a rotary movement is transferred to the drive auger 91 '. This causes the worm wheel 93 to move and in this way the worm 94 which leads to a relative movement between the rack 51 and the gear. With this device, it is also possible to operate a seat adjustment device or window lifter or other adjustment devices in a motor vehicle. Figure 19 shows a main outline from which it is possible to see the use of the invention to drive a window lifter in a vehicle door. As can be seen from Figure 19, a window pane 12 is retained between two. Guide rails 131, 132 that are arranged one on each side of the vehicle door. A window lifter motor 15 is mounted on the lower edge 12 'of the window pane 12 through a retaining rail 14 and is supplied with power through a cable. The drive shaft 23 of the window lifter motor 15 is connected to the gear 9. The construction of the gear 9 was already described in further detail with reference to Figure 4. That is, a worm gear (not shown herein). ) is located within the gear housing 7 and engages that of a threaded spindle 5 'through a spindle nut. The threaded spindle 5 is rotationally secured in the inner door panel 15 through the locking angles 161, 162. The spindle axis 5 threaded in this way must point in the direction of movement of the window pane 12. If the window lifter motor 15 rotates then the spindle nut is rotated through the auger (not shown here). Since the threaded spindle 5 'is secured against rotation, the fixed gear unit 9, the motor 15 of the window lifter and the window glass 12 must move along the threaded spindle 5'. The window pane 12 is thus guided in the guide rails 131, 132. The use of the invention is not restricted to the examples described above for the operation of the window lift drive unit and the longitudinal adjustment of the window. seating. In addition, it is possible to use the invention for spindle or worm drive units for adjusting the height of the seats, inclination of the seats, depth of cushioning of the seats, backrest of the seats and / or limitation of the window.

LIST OF REFERENCE NUMBERS Retaining plate 10a, 10b Uncoupling element lia, 11b Retaining brackets 12 Window glass 12 Bottom edge of window glass 131, 132 Guide rails 14 Retention rails 15 Window lift motor 151 Cable 161, 162 Retention angle 2 Drive motor 21, 22 Drive shaft 24 Drive shaft 3 Top rail 30 Clamping opening 31 Hollow cavity 4 Bottom rail 5, 5 'Threaded spindle 51 Toothed rack 52 Positive clamping element 60, 60' Threaded element 60a Welding point 1 Slot 2 Passage 3, 63 'Locknut 4, 64' Nut 5 Safety plate 5a Support 5b Reception hole threaded spindle 5c Depres ion 6 Rotational lock 6a Positive clamping element 6b Internal contour of the anti-rotation guard 7 Reception opening of the threaded spindle 7a Plastic safety member 8 Special lock nut a, 6b Carriers c, 6d, 6c ', 6d' Nuts Clamping e Top, 7 'Gear housing 1a, 71b Housing plates 2a, 72b Housing plates 3a, 73b Bearing holes 4a, 74b Bearing holes 75, 75', 75 '' Depressions 76, 76 ', 76' 'Frames 761, 762 Frames 77 L-shaped housing plate 78 U-shaped housing plate 79 Disc-type housing plate 8 Carrier 81 Gear female plug 82a, 82b Carrier arm 83 Clamping openings 84 Nut 85 Angular areas 86a, 86b Gear female plug arm 87a, 87b Ideal deformation points 9, 9 'Gear 91 Drive screw 92 Spindle nut 92' Worm wheel tooth 93 Worm wheel 94 Worm 95, 95 ', 96, 96' Tree ring

Claims (42)

1. CLAIMS 1. A spindle or worm drive unit for adjusting devices in motor vehicles, more particularly for seat adjustment devices, window lifts and sliding roofs, with a fixed spindle or a fixed toothed rack that is fixed in a first of the two relatively displaceable parts, with a gear that is mounted on the second of the relatively displaceable parts, and with a gear housing for retaining the gear, with the gear housing consisting of at least two plates housing that can be fixed to each other by means of plug connectors, characterized in that the position of the housing plates is fixed relative to each other in all three-dimensional directions by means of the plug-type connectors and that the plug-type connectors they are formed at the same time as support connection junctions that absorb the forces of the gears. The drive unit according to claim 1, characterized in that the receiving plates are fixed against each other only in the plug-type connections. 3. The drive unit according to claim 1 or 2, characterized in that the gear housing consists of two type L housings. The drive unit according to claim 1 or 2, characterized in that the gear housing consists of minus two pairs of opposing disk-like housing plates, wherein the accommodation plates that are arranged in pairs are preferably of identical design. The drive unit according to claim 1 or 2, characterized in that the gear housing consists of a U-shaped and disk-type receiving plate. The drive unit according to one of the preceding claims, characterized in that the raised areas of the plug-like connections extend along the plane of the receiving plates and the associated depressions extend transversely to the plane of the receiving plates . The drive unit according to claim 6, characterized in that the depressions are formed as openings through it. 8. The drive unit according to claim 6, characterized in that the raised areas are formed as frames. 9. The drive unit according to claim 6 to 8, characterized in that the raised areas of the plug-type connectors have in the direction of assembly parallel surfaces associated with the coupling depressions with surfaces that are also parallel in the direction of mounting. The drive unit according to one of claims 6 to 8, characterized in that the raised areas of the plug-type connectors have surfaces running conically in the mounting direction and associated with depressions having surfaces that where necessary are parallel to each other. the mounting direction so that a press fit is achieved during assembly. The drive unit according to one of claims 6 to 8, characterized in that the raised areas of the plug-type connectors initially form an adjustment with play with the depressions and that the fixing of the accommodating plates is achieved by deformation plastic material in the area of plug-type connectors. 12. The drive unit according to one of the above indications, characterized in that the housing plates are made from the sintered material, molten material, steel or plastic. The drive unit according to one of the preceding claims, characterized in that at least a part of the bearing points of the engaging elements is integral in the housing plates. The drive unit according to one of the preceding claims, characterized in that the gear consists of a threaded spindle, a spindle nut with worm wheels, external wrenches and a drive worm that engages with these. A drive unit according to one of the preceding claims, characterized in that the gear comprises a toothed rack, a worm with a worm wheel associated therewith and a worm gear where the worm is on an axis with the worm wheel and is fixedly connected to it. 16. The drive unit according to one of the preceding claims, characterized in that the threaded spindle is mounted in the hollow cavity of a square profile guide rail of a longitudinal seat adjustment device, wherein the threaded spindle is fixed through its ends on the bottom rail that is fixed on the vehicle while the gear housing is fixed on the upper rail that can be moved relative to it. The drive unit according to claim 16, characterized in that the gear housing is mounted on a U-shaped gear socket of a carrier whose arms are provided to fix the gear on the top rail. The drive unit according to claim 16 and 17, characterized in that the arms of the carrier extend over the entire length of the upper rail and support the fastening openings associated with the upper rail fastening openings so that the carrier is You can connect to the top rail and reinforce it. The drive unit according to claims 16 to 18, characterized in that the holder holding openings are formed as fastening elements with internal threads preferably in the form of passages, projecting towards the hollow cavity. The drive unit according to claims 16 to 19, characterized in that the gear is pre-assembled as a complete unit and installed in the carrier, it can be pushed towards the hollow cavity of the rail guide, where it can be screw the upper rail through the fixing openings. The drive unit according to one of claims 16 to 20, characterized in that the carrier end areas are angled and designed so that they substantially fill the free transverse clamping area of the upper rail and / or the rail of the carrier. background. The drive unit according to one of the preceding claims, characterized in that the rubber or plastic coupling elements are assembled to eliminate noise and compensate for the tolerances between the gear and the arms-of the female meshing plug of the carrier. The drive unit according to one of the preceding claims, characterized in that the ideal deformation points are formed between the arms of the meshing socket and the arms of the carrier so that when a predetermined maximum limit force is exceeded, the arms They bind laterally and are attached to the threaded spindle. The drive unit according to one of the preceding claims, characterized in that the ends of the threaded spindle are mounted in vibration damping sleeves or the like to eliminate noise. The drive unit according to one of the preceding claims, characterized in that for a window lifter, the threaded spindle is fixed on the vehicle door so that the threaded spindle points in the direction of movement of the window glass and that the gear that connects to the threaded spindle is connected directly or indirectly to the lower edge of the window glass. The drive unit according to one of the preceding claims, characterized in that the spindle or screw drive unit is a constituent part of an adjustment device for adjusting the seat height, seat inclination, depth of cushioning of the seats, head restraint and / or backup. 27. A method for mounting a gear housing for a worm or auger drive unit according to one of the preceding claims, wherein: a) the engagement elements and the housing plates are pre-adjusted complete where the housing plates are fitted together and the plug connections are formed as support connection joints that absorb the forces of engagement, b) the engagement elements and the housing plates are inserted into a device that retains the housing with holding forces sufficiently light around the outer contour so that the housing plates can be aligned when the gear elements are rotated, c) the engaging elements are rotated for the purpose of aligning the bearing points of the engaging elements that are provided in the housing plates, d) and that after alignment by increasing the retaining forces, the position of the engagement elements and the housing plates relative to each other permanently secure and fix the position of the receiving plates in all three-dimensional directions through the action of the plug-type connectors. 28. A method for mounting a gear housing for the screw or worm drive unit according to claim 27, characterized in that the engaging elements are rotated around at least 360 ° and then retained in this position and fixed . 29. The method for mounting a gearbox for the spindle or worm drive unit according to claim 27, characterized in that the engagement elements are driven at a speed that is above the nominal speed of the gear. and during the rotation of the engaging elements the position of the receiving plates is fixed, one relative to the other. 30. The method for mounting a gear housing for the spindle or worm drive unit according to claim 27, characterized in that the fixing of the housing plates occurs when delimiting the material in the area of the plug-type connectors, but outside the area of the bearing holes for the spindle nut. 31. The method for mounting a gear housing for the auger or worm drive unit ~ according to claim 27, characterized in that the fixing of the housing plates is undertaken by laser welding or by molding the plug-type connectors. 32. The method for mounting a gear housing for the spindle or worm drive unit according to claim 27, characterized in that the fixing of the housing plates is carried out by delimiting the plug-type connectors. 33. The method for mounting a gear housing for the spindle or worm drive unit according to claim 27, characterized in that the retention of the outer contour of the receiving plates, the rotation of the meshing elements and the delimitation of Plug-type connectors are carried out in a combined mounting device. 34. Spindle drive unit for adjustment devices in motor vehicles, according to claim 1, wherein a threaded spindle is tensioned rotationally between the two carriers at the ends, where the threaded spindle is associated with a spindle nut mounted in a gear, characterized in that the threaded spindle is fixed through at least one ideal breaking point in at least one carrier and that at least one end of the threaded spindle is formed as a positive holding element which only connects to a rotating tool in order to overcome the ideal breaking point for the purpose of an emergency operation of the drive unit. 35. The spindle drive unit, according to rei indication 1, characterized in that a threaded element having a groove as a local material weakness area is welded to one of the carriers and the threaded element is crushed through this Weakening of material with the threaded spindle. 36. The spindle drive unit according to claim 1, characterized in that the threaded element has on the side away from the carrier a distance sleeve to define the travel route of the upper rail on the rail --- of the bottom. 37. The spindle drive unit according to claim 1, characterized in that for the retention of the threaded spindle one of the carriers has a passage that collapses with the threaded spindle at least in one place. 38. The spindle drive unit according to claim 1, characterized in that a threaded element is welded to one of the carriers and this is associated with a locknut to fix the position of the threaded spindle. 39. The spindle drive unit according to claim 1, characterized in that a tucker which is kept secured in one of the carriers is welded to the threaded spindle and at least one point, so that the welding point is formed as the ideal breaking point. 40. The spindle drive unit according to claim 1, characterized in that an anti-rotation lock made preferably of plastic mounted securely against rotation in the threaded spindle is inserted with positive clamping coupling in a receiving hole of threaded spindle of a safety plate where the rotation lock is destroyed during the emergency operation of the threaded spindle. 41. The spindle drive unit according to claim 1, characterized in that the safety plate fixes through a support the position of the nut that is mounted on the threaded spindle and ensures the position of the threaded spindle. 42. The drive unit according to claim 1, characterized in that a plastic safety member is formed in a receiving aperture of the threaded spindle of both carriers so that the round, circular cross-section of the spindle receiving openings threaded remain secure and the width b, of the plastic safety member is greater than the diameter d, of the receiving aperture of the threaded spindle where the case of an emergency operation, the plastic safety member can be removed and the Threaded spindle can escape into the space that becomes available.