WO2013053540A1 - Adjustment drive with an overload protection system and a locking mechanism - Google Patents

Abstract

The invention relates to a component, in particular for a motor vehicle, comprising a gear motor and a component which can be adjusted by means of the gear motor, in particular a tailgate, a door, or a seat. The aim of the invention is to limit a torque of the component. This is achieved in that the component comprises an overload protection system, said component additionally comprising a locking mechanism. The aim is further achieved by means of an adjustment drive for a component, in particular a component according to the invention, a transmission unit, in particular for such an adjustment drive, and a component which can be adjusted by means of an adjustment drive, in particular for a motor vehicle.

Description

 description

Adjustment drive with an overload protection and a locking state of the art

The present invention relates to a component, in particular for a motor vehicle, comprising a gear motor and a component adjustable by means of the geared motor, in particular a tailgate, a door or a seat, the component comprising an overload protection for limiting a torque of the component solved with an adjusting drive for a particular inventive component, a transmission unit, in particular for such an adjustment, as well as an adjustable by means of a Versteilantriebs component, in particular for a motor vehicle.

To adjust components, such as a flap or door, or for height adjustment or tilt adjustment of a seat, Versteilantriebe are required, which often have a high reduction and transmit high torque. Such components, such as a tailgate, a door or a seat of a motor vehicle, are often manually operated.

However, the transmission of Versteilantriebs or the component, or the adjustment itself, during the automatic adjustment in a simultaneously taking place, in particular jerky, manual operation or a holding damaged or even destroyed. To avoid this, it is known to provide the Versteilantrieb with an overload protection, for example with a slip clutch, which allows a relative movement between the manually operated component of the component and the transmission or Versteilantrieb. Such overload protection must be able to transmit a minimum limit torque of a gear motor without slipping in order to adjust the component. In addition, it should slip safely from a slipping torque to limit the torque in the gear assembly. The difference between the limit torque and the slip torque is the relevant tolerance for the transmittable torque of the overload protection.

For such overload protection, a tolerance ring is often used. However, a tolerance ring has a very small working range, namely a very small spring travel on. As a result, the tolerance is adjustable and difficult to achieve within very narrow limits. Therefore, if a tolerance ring is used for the overload protection, the components required for it must be manufactured very accurately to ensure the function, which often requires a post-processing and is expensive.

Disclosure of the invention

Object of the present invention is to provide an adjustable by means of a geared motor component, in particular for a motor vehicle, which is versatile adaptable, and which includes an overload protection, in particular with a tolerance ring, with a larger tolerance width.

The object is achieved with a component, in particular for a motor vehicle, with a geared motor and a component which can be adjusted by means of the geared motor, in particular a tailgate, a door or a motor vehicle. a seat, wherein the component comprises an overload protection for limiting a torque of the component, wherein it also includes a locking mechanism.

The locking mechanism ensures that a torque is always transmitted through the locking mechanism when the locking mechanism is locked, and when the locking mechanism is free. The choice in which direction the locking locks or runs freely allows a variable adaptation to different adjustment tasks.

The ratchet preferably has a drive side facing the geared motor and an output side facing the component, wherein a torque acting on its output side can not be transmitted to its drive side in at least one direction of rotation. As a result, an output side of the locking effected, in particular manual, rotation in the direction of rotation is not transmitted to the drive side, so that the locking mechanism at the output side effected drive in this direction of rotation runs freely.

In addition, it is preferred that a torque acting on its drive side can be transmitted to its output side in at least one direction of rotation, so that the locking mechanism blocks in this direction of rotation when the drive is on the drive side. As a result, a rotation caused on the drive side of the locking mechanism is transmitted in this direction of rotation to the output side of the locking mechanism.

The overload protection and the locking mechanism are preferably each connected on the drive side and the output side rotatably connected to each other. As a result, the locking mechanism is connected in parallel with the overload protection. With locking locking a torque is therefore transmitted via the locking mechanism. If the locking mechanism is free, it can only be transmitted via the overload protection, provided that it intervenes. Particularly preferably, the ratchet transmits no torque acting on its output side on its drive side, so that it always runs freely on rotation of its output side regardless of the direction of rotation. Since no torque output side of the locking mechanism is transmitted to the drive side of the locking mechanism, such a torque can only be transmitted to the drive side via the overload clutch.

It is also preferred that the locking mechanism always transmits a torque acting on its drive side to its output side, so that the locking mechanism always blocks the torque produced on the drive side, regardless of the direction of rotation. Since the locking mechanism always locks on the drive-side torque, each torque acting on the drive side is transmitted via the locking mechanism to the output side. Therefore, the limit torque is transmitted via the ratchet to the output side. The overload protection is thus independent of a drive side caused torque, in particular the geared motor, dimensioned. A lower limit, from which the overload protection transmits a torque, is therefore also smaller than the limit torque adjustable, so that the tolerance width of the overload protection is greater and therefore easier to set.

It is preferred that over the overload protection at least an inhibiting torque is transferable, which holds the component in an existing position. Since the restraining torque requires no adjustment of the component, it is smaller than the limit torque for adjusting the component. Since the tolerance range of this overload protection is increased, component components with larger tolerances can be used for them, which are less expensive to produce and / or require no rework. It is preferred that a transmissible over the locking torque is greater than a maximum torque of the geared motor, so that each torque of the geared motor via the locking mechanism is transferable.

Further preferably, the drive side and the output side of the GE are locks frictionally, or frictionally and positively connected to each other. Compared to a positive connection, the frictional or frictional and positive connection has the advantage that in the region of the transmittable torque over the locking torque any torque on the locking mechanism is transferable.

In a preferred embodiment, the overload protection on a tolerance ring with which the drive side of the overload protection frictionally and positively connected to the output side of the overload protection. A tolerance ring is inexpensive to produce. In addition, in the case of the component according to the invention, because of its greater tolerance range for overload protection, it permits a more cost-effective production due to the omitted reworking of its components.

Between the geared motor and the component, the component preferably has a gear arrangement, which is provided for reducing a rotational speed of the geared motor.

In a preferred embodiment, the locking mechanism and the overload protection components of the transmission assembly. In a further preferred embodiment, the ratchet and the overload protection between the gear assembly and the adjustable component are arranged. It is particularly preferred that the locking mechanism and the overload protection are integrated together in a transmission component of the transmission arrangement. Compared to the arrangement of the locking mechanism and the overload protection between the gear assembly and the adjustable component or in the adjustable component, the embodiment in which the locking mechanism and the overload protection are provided in the transmission arrangement, the advantage that optionally a reduction of at least a portion of the transmission unit available is, so that the overload protection can be made smaller. Integrating the locking mechanism and the overload protection in a transmission component or in the adjustable component also has the advantage that the locking mechanism and the overload protection require very little or no additional space and the number of components is low.

The object is further achieved with a Versteilantrieb for a particular inventive component, with a geared motor and overload protection, where it also includes a locking mechanism. The final drive furthermore preferably comprises a gear arrangement, wherein the overload protection and the locking mechanism are components of the gear arrangement. Preferably, the overload protection and the locking mechanism are connected in parallel. Also preferably, they are integrated in a transmission component.

The object is further achieved with a gear arrangement, in particular for such a Versteilantrieb, wherein the gear assembly comprises an overload protection and a locking mechanism. The overload protection and the locking mechanism are connected in parallel in a preferred embodiment. Particularly preferably, they are integrated together in a transmission component of the transmission arrangement.

The object is further achieved with a component, in particular a tailgate, a door or a seat, in particular for a motor vehicle, which is adjustable by means of an adjustment drive, wherein the component comprises an overload protection and a locking mechanism. The overload protection and the ratchet are preferably provided on a drive side of the component. In a preferred embodiment, they are connected in parallel.

In the following the invention will be described with reference to figures. The

Figures are merely exemplary and do not limit the general inventive concept.

Fig. 1 shows in (a) and (b) each have a component according to the

 State of the art,

Fig. 2 shows in (a) and (b) respectively an embodiment of a component according to the invention, and

Fig. 3 shows an example of a locking mechanism.

Fig. 1 (a) shows schematically a Versteilantrieb 6 according to the prior art. The adjusting drive 6 comprises a gear arrangement for reducing a rotational speed of a gear motor 1, which comprises a drive unit 2, an output unit 4 and an intermediate unit 3.

The drive unit has a drive shaft 12 which can be driven by means of the geared motor 1. On the drive shaft 12, a first screw 2.1 1 of a first worm gear 2.1 is arranged, which cooperates with a first worm gear 2.12 of the first worm gear 2.1. The first worm gear 2.12 is arranged on a worm shaft 22 which is arranged transversely to the drive shaft 12.

On the worm shaft 22, a second worm 2.21 of a second worm gear 2.2 is arranged, which cooperates with a second worm gear 2.22 of the second worm gear 2.2, the an intermediate shaft 23 is arranged. The intermediate shaft 23 is arranged transversely to the worm shaft 22, and thus axially parallel to the drive shaft 12.

The first worm gear 2.1 and the second worm gear 2.2 are therefore connected in series to form a twin worm gear.

When driving the drive shaft 12, the worm shaft 22 is driven via the first worm gear 2.1, which in turn drives the intermediate shaft 23 via the second worm gear 2.2.

At the intermediate shaft 23, a gear is arranged 2.32, which cooperates with a spur gear 2.31, and together with this forms a spur gear 2.3. The spur gear 2.31 is arranged on a first output shaft 24 of the drive unit 2. This arrangement allows the first

Output shaft 24 is arranged coaxially with the drive shaft 12. When driving the intermediate shaft 23, the gear is driven 2.32, which is in engagement with the spur gear 2.31 of the spur gear 2.3, so that the spur gear is driven 2.31. As a result, the first output shaft 24 is driven.

The spur gear 2.3 is a first gear stage of the drive unit 2, wherein the first and the second worm gear 2.1, 2.2 are further arranged between the drive 1 and the first gear stage 2.3 gear stages. Each of the gear stages shown here enables a reduction of the speed of the geared motor. 1

In the embodiment of the Versteilantriebs 6 shown here, an intermediate unit 3 is adapted to the first output shaft 24 by way of example. The intermediate unit 3 comprises, for example, a sensor 3.1 and / or further additional functions 3.2. It is modular according to the requirements of Versteilantriebs between the drive unit and an output unit adaptable and not a mandatory part of Versteilantriebs. The intermediate unit 3 has a connecting shaft 33 which, with its side facing the drive unit 2, can be adapted to the first output shaft 24 of the drive unit 2, the output unit 4 being adaptable on its side facing away from the drive unit 2.

The output unit 4 of the Versteilantriebs 6 is formed as a planetary gear 4.1. The planetary gear 4.1 includes a sun gear 4.1 1, which is here adapted to the intermediate shaft 33 of the intermediate unit 3 and driven by this. The planetary gear 4.1 includes planet gears 4.12, which are interconnected by means of a planet carrier 4.13. On the planetary gear 4.13, a second output shaft 45 is arranged, which is arranged coaxially with the sun gear 4.1 1 and the first output shaft 24.

When driving the sun gear 4.1 1, the planet gears are driven 4.12, so that the planet 4.13 rotates. As a result, the second output shaft 45 arranged on the planet carrier 4.13 rotates.

The sun gear 4.1 1 of the planetary gear 4.1 of the output unit 4 is also directly adaptable to the first output shaft 24 when the functions integrated in the intermediate unit 3 functions are not needed.

In addition, the adjustment drive 6 can also be used without the output unit 4 for driving an adjustable component 5, although the requirements provided by the output unit 4 are not required. Therefore, both the first output shaft 24 and the second output shaft 45 for driving the adjustable member 5 can be used.

The drive unit 2 has a first housing part 21, the output unit 4 a second housing part 41 and the intermediate unit 3, a third housing part 31, in which their transmission components 2.1 - 2.3, 3.1, 4.1 are each stored. Of the Electric motor 1 is also mounted on the first housing part 21. The

Housing parts 21, 31, 41 preferably adhere to each other when adapting, so that they protect the transmission components 2.1 - 2.3, 3.1, 4.1 from dust and moisture.

In the present embodiment, a lever is provided as an adjustable component 5, to which, for example, a tailgate or a door can be arranged. In the following, the terms adjustable component 5 and levers are used synonymously. The adjustment 6 is also suitable for the adjustment of seats, doors or similar adjustment units that are manually operated at the same time.

In this embodiment, the second output shaft 45 is provided for driving the adjustable component 5.

In order to protect the adjustment drive 6 against overload, an overload protection 60 is provided. The overload protection 60 is designed as a slip clutch and has an inner ring 601, which is non-rotatably arranged on the second output shaft 45, an outer ring 602, which is formed in Fig. 1 (a) by the lever 5, and between the outer ring 602nd and the inner ring 601 arranged tolerance ring 603 as a coupling means to connect the outer ring 602 and the inner ring 601 together.

Although in this embodiment, the outer ring 602 is formed by the lever 5, this embodiment does not require additional space for the overload protection 60. A disadvantage of this embodiment, however, that the overload protection 60 must be designed for very large loads, since he at the adjustable component 5 facing side of the output unit 4 is arranged. In contrast, in FIG. 1 (b), the overload protection is integrated in a transmission component, namely in the spur gear 2.31 'of the drive unit 2 of the gear arrangement 2, 3, 4. As a result, it is integrated in the drive unit 2, without requiring additional space. In addition, it can be made smaller in comparison to the Fig. 1 (a), since the reduction of the output unit 4 is available.

In the two embodiments of a component according to the prior art shown in FIG. 1, the overload protection 60 must transmit at least a minimum limit torque of the geared motor 1 without slippage in order to be able to adjust the adjustable component 5. In order to limit the torque in the gear assembly 2, 3, 4 and protect the gear assembly 2, 3, 4 and / or the geared motor 1, it is also required that the overload protection 60 from a

Slipping torque safely slipped.

Since in the embodiments shown in FIG. 1, a tolerance ring 603 is used for connecting the inner ring 601 to the outer ring 602 and the first output shaft 24 of the drive unit 2 with the spur gear 2.31 ', and the adjustable working range is therefore very low Difference between the limit torque and the slip torque formed tolerance for the overload protection 60 difficult to adjust.

2 shows in (a) and (b) respectively an embodiment of a component according to the invention, in which the overload protection 101, 102, 103, 2.31 ", 24" can be set within a larger tolerance range.

The components of both inventive embodiments differ from the prior art in that they have a locking mechanism 101, 102, 104, 2.31 ", 24". The further construction is the same as in the

The prior art of FIG. 1. In principle, it is suitable for the invention Permitted component but any Versteilantrieb 6 with overload protection

101, 102, 103, 2.31 ", 24".

 Both the ratchet 101, 102, 104, 2.31 ", 24" and the overload protection 101, 102, 103, 2.31 ", 24" have a drive side facing the geared motor 1, which in the embodiment of FIG. a) as

Inner ring 101 and in the embodiment of Fig. 2 (b) as the first

Output shaft 24 "of the drive unit 2. In addition, both the ratchet 101, 102, 104, 2.31", 24 "and the overload protection 101,

102, 103, 2.31 ", 24" facing the component 5 to be adjusted

Output side, here in the embodiment of Fig. 2 (a) as an outer ring

2 (b) is formed as a spur gear 2.31 "in the following, therefore, the term drive side is used both for the ratchet 101, 102, 104, 2.31", 24 "and for the overload protection 101, 102,

103, 2.31 ", 24" is used interchangeably with the terms inner ring 101 in the embodiment of Fig. 2 (a) and first output shaft 24 "of the drive unit 2 in the embodiment of Fig. 2 (b) Term output side both for the ratchet 101, 102, 104, 2.31 ", 24" and for the overload protection 101, 102, 103, 2.31 ", 24" synonymous with the terms outer ring 102 in the embodiment of FIG.

2 (a) and spur gear 2.31 "in the embodiment of Fig. 2 (b).

The ratchet 101, 102, 104, 2.31 ", 24" in both embodiments, the overload protection 101, 102, 103, 2.31 ", 24" connected in parallel. Therefore, the ratchet 101, 102, 104, 2.31 ", 24" and the overload protection 101, 102, 103, 2.31 ", 24" on both their drive side 101, 24 "and on their output side 102, 2.31" each rotatably connected to each other ,

The outer ring 102 is formed by the lever 5 in FIG. 2 (a). The inner ring 101 is rotatably arranged on the output shaft 45 of the Versteilantriebs 6 in this embodiment. In this embodiment, therefore, the ratchets 101, 102, 104, 2.31 ", 24" and the overload protection 101, 102, 1034, 2.31 ", 24" between the gear assembly 2, 3, 4 and arranged to be adjusted component 5 and integrated into this.

In FIG. 2 (b) they are integrated in the spur gear 2.31 "and therefore components of the gear arrangement 2, 3, 4.

In both embodiments, the locking mechanism 101, 102, 104, 2.31 ", 24" is designed on the output side 102, 2.31 "due to the parallel connection such that it has a torque acting on the locking side 101, 102, 104, 2.31", 24 ". independently of a direction of rotation 7. As a result, a torque produced by the geared motor 1 is transmitted via the ratchet 101, 102, 104, 2.31 ", 24" to the output side 102, 2.31 ". The overload protection 101, 102, 103, 2.31 ", 24" is therefore independent of a limit torque which must be at least transferable for adjusting the adjustable component 5. A lower limit, from which the overload protection 101, 102, 103, 2.31 ", 24" transmits a torque, is therefore also smaller.

In addition, the ratchet 101, 102, 104, 2.31 ", 24" in both embodiments is therefore designed so that there is a torque on the output side of the ratchet 101, 102, 104, 2.31 ", 24" acting torque regardless of the direction of rotation 7 on the Drive side 101, 24 "transmits .Thus a torque can therefore only via the overload protection 101, 102, 103,

2.31 ", 24" are transmitted to the drive side 101, 24 ", which is provided as an emergency protection in the event of a failed geared motor 1.

In principle, the overload protection 101, 102, 103, 2.31 ", 24" must still slide safely from the slipping torque so that the maximum transmittable over the overload protection 101, 102, 103, 2.31 ", 24"

Slip torque does not change. The difference between the Lower limit and the slip torque resulting tolerance is greater due to the reduced lower limit.

In both embodiments, the overload protection 101, 102, 103, 2.31 ", 24" uses a tolerance ring 103 for connecting the drive side 101, 24 "to the output side 102, 2.31". The tolerance of the overload protection 101, 102, 103, 2.31 ", 24" is more easily adjustable despite the low working range of the tolerance ring 103 due to the larger tolerance width in the component according to the invention.

FIG. 3 shows schematically and by way of example a locking mechanism 101, 102, 104 which is suitable for the adjusting drive 6 according to the invention. The ratchet 101, 102, 104 locks in a drive-side rotational movement both in and against the direction of rotation 7. In a driven-side rotational movement, however, it runs in and against the direction of rotation 7 free.

Visible is a drive side driven inner ring 101, which is arranged in a driven side driven outer ring 102. The inner ring 101 has two recesses 101 .1, between which a partition 101 .2 is provided, and in each of which a ball 104 is mounted as a connecting means between the inner ring 101 and the outer ring 102 against the force of a spring 101 .3 adjustable. The outer ring 102 has an approximately drop-shaped cross section.

The springs 101 .3 press the balls 104 against the outer ring 102 and the inner ring 101. When drive-side drive of the inner ring 101, the two balls 104 are thereby pressed and jammed in the wedge-shaped cross-section, so that the locking mechanism 101, 102, 104 blocks. On the output side Antneb of the outer ring 102, however, the balls 104 are rotated out of the wedge-shaped cross-section so that they do not jam and the outer ring 102 runs freely. This allows the drive-side drive both in and against the direction of rotation 7 always a transmission of torque. The output-side drive allows both in and against the direction of rotation 7 no transmission of torque.

Claims

claims 1 . Component, in particular for a motor vehicle, having a geared motor (1) and a component (5), in particular a tailgate, a door or a seat, adjustable by means of the geared motor (1), wherein the component has an overload protection (101, 102, 103, 2.31 ", 24") for limiting a torque of the component, characterized in that  it also includes a locking mechanism (101, 102, 104, 2.31 ", 24"). 2. Component according to claim 1, characterized in that the locking mechanism (101, 102, 104, 2.31 ", 24") a geared motor (1) facing the drive side (101, 24) and the component (5) facing the driven side (102 , 2.3.1), one on its output side (102, 2.3.1) acting torque in at least one direction of rotation (7) is not transferable to its drive side (101, 24). 3. Component according to one of the preceding claims, characterized in that on the drive side (101, 24) of the locking mechanism (101, 102, 104, 2.31 ", 24") acting torque in at least one direction of rotation (7) on the output side ( 102, 2.3.1) of the locking mechanism (101, 102, 104, 2.31 ", 24") is transferable. 4. Component according to one of the preceding claims, characterized in that no on the output side (102, 2.3.1) of the locking mechanism (101, 102, 104, 2.31 ", 24") acting torque on the drive side te (101, 24) of the locking mechanism (101, 102, 104, 2.31 ", 24") is transferable, and / or that each on the drive side (101, 24) of the locking mechanism (101, 102, 104, 2.31 ", 24 ") acting torque on the Output side (102, 2.3.1) of the locking mechanism (101, 102, 104, 2.31 ", 24") is transferable. Component according to one of the preceding claims, characterized in that on the overload protection (101, 102, 103, 2.31 ", 24") an inhibiting torque is transferable. Component according to one of the preceding claims, characterized in that over the locking mechanism (101, 102, 104, 2.31 ", 24") transmissible torque is greater than the maximum torque of the geared motor (1). Component according to one of the preceding claims, characterized in that the drive side (101, 24) and the output side (102, 2.3.1) of the locking mechanism (101, 102, 104, 2.31 ", 24") frictionally, or frictionally and positively connected to each other. Component according to one of the preceding claims, characterized in that the overload protection (101, 102, 103, 2.31 ", 24") has a drive side (101, 24) and an output side (102, 2.3.1), wherein the drive side (101 , 24) of the overload protection (103) and the drive side (101, 24) of the locking mechanism (101, 102, 104, 2.31 ", 24"), and the output side (102, 2.3.1) of the overload protection (101, 102, 103 , 2.31 ", 24") and the output side (102, 2.3.1) of the locking mechanism (101, 102, 104, 2.31 ", 24") are each connected to each other in a rotationally fixed manner. 9. Component according to one of the preceding claims, characterized in that the overload protection (101, 102, 103, 2.31 ", 24") has a tolerance ring. 10. Component according to one of the preceding claims, characterized in that between the gear motor (1) and the component (5) has a gear arrangement (2, 3, 4) is arranged. 1 1. Component according to one of the preceding claims, characterized in that the ratchet (101, 102, 104, 2.31 ", 24") and the overload protection (101, 102, 103, 2.31 ", 24") together form either components of the gear arrangement (2, 3, 4), or between the gear arrangement (2, 3, 4) and the adjustable component (5) are arranged. 12. Component according to one of the preceding claims, characterized in that the locking mechanism (101, 102, 104, 2.31 ", 24") and the overload protection (101, 102, 103, 2.31 ", 24") together in a transmission component (2.3 ) of the gear arrangement (2, 3, 4), or in the adjustable component (5) are integrated. 13. Versteilantrieb (6) for a component, in particular according to one of the preceding claims, with a geared motor (1) and one by means of the geared motor (1) drivable gear arrangement (2, 3, 4) for reducing a speed of the geared motor (1 ), wherein the adjustment drive (6) comprises an overload protection (101, 102, 103, 2.31 ", 24"),  characterized in that  he also includes a locking mechanism (101, 102, 104, 2.31 ", 24"). 14. gear arrangement (2, 3, 4) for an adjustment drive (6), in particular according to claim 13, characterized in that  it comprises overload protection (101, 102, 103, 2.31 ", 24") and a body (101, 102, 104, 2.31 ", 24"). 15. component (5 '), in particular for a motor vehicle, which by means of a Adjustment drive (6), in particular according to claim 13, is adjustable, characterized in that  it comprises overload protection (101, 102, 103, 2.31 ", 24") and a body (101, 102, 104, 2.31 ", 24").