WO2018215010A1

WO2018215010A1 - Actuating drive for a motor vehicle

Info

Publication number: WO2018215010A1
Application number: PCT/DE2018/100286
Authority: WO
Inventors: Claus Töpfer; Winfried Schlabs; Tim SONNENSCHEIN
Original assignee: Kiekert Ag
Priority date: 2017-05-24
Filing date: 2018-03-28
Publication date: 2018-11-29
Also published as: DE102017111354A1; CN110945761A; CN110945761B; KR20200012919A; EP3631950A1; KR102507727B1

Abstract

The invention relates to an actuating drive (1) for a motor vehicle, having a housing (3) composed in particular of a housing shell (2) and a housing cover, and an electric drive (4), wherein the drive (4) is used to move an actuating means (6), the actuating means (6) is moved at least by a spindle drive (4, 12, 13) and the spindle (5) can be held under pre-load in a bearing retainer (18). The pre-load can be generated by a spring element (19) that can be inserted into the housing (3).

Description

description

The invention relates to an actuator for a motor ^¬ vehicle comprising a housing, in particular of a housing shell and a housing cover, an electric drive, wherein by means of the electric drive an adjusting means is movable and the adjusting means is movable at least by means of a spindle drive and the Spin ^¬ del under prestress in a bearing receptacle is durable.

Such actuators are preferably used in Kraftfahrzeu ^¬ gene to execute an actuating movement. In this case, the actuator can be integrated into, for example, a motor vehicle lock or cooperate with a motor vehicle lock. Moreover, it is also adjustable before ^¬ that the actuator is an actuating means for moving at ^¬ game for locking a tank flap or a tray and a lid. The actuating means is thus used where movements in the vehicle must be initiated or generated. It can act on the actuating means ei ^¬ ne tensile or compressive force, depending on the application and arrangement on or in the motor vehicle. For example, the adjusting means can also interact with a Bowden cable, so that, for example, a closing movement in a motor vehicle lock can be generated. Depending on the application act on the actuating means and thus the spindle drive alternately tensile and compressive forces, which can also be generated by the intervention of the electric drive. On the one hand to ensure sufficient clearance during storage of the spindle of the spindle drive, so that the spindle with the lowest possible friction losses can be stored and at the same time to ensure safe storage of the spindle in the actuator, various approaches ^¬ approaches have become known. The solution approaches are characterized by the fact that a possible backlash-free storage of the moving components are generated, while reducing the friction or bearing losses in the bearing mounts of the moving components.

From EP 0 133 527 B2 an arrangement is known, with which the shaft or the drive axle of a Kleinstantrie ^¬ bes is slidably mounted. The tip of this motor shaft is mounted in a disc, which can probably be regarded as Axi ^¬ alanschlag simultaneously.

From DE 10 2013 007 272 AI, a microdrive with a microdrive and a worm gear housing taking housing consisting of housing box and hous ^¬ sedeckel has become known, the motor axis of the microdrive abge ^¬ supported via a bearing bore in the housing and there via an axial stop is secured. To minimize the friction in the bearing mount, the motor axis has a tip which cooperates with a Axialan ^¬ impact. In this case, the axial stop is formed from the housing cover, wherein the axial stop has a trough which receives the corresponding tip of the motor ^¬ axis. In addition, the corresponding part of the axial stop has a longitudinal gap, over which the speaking axial movement of the motor housing can be resiliently ^¬ supported.

From WO 2015/036837 AI a drive unit for automotive applications, in particular for use in or in combination with a motor vehicle door lock, with a housing, further with a motor and a belonging to ^¬ motor shaft has become known. The Antriebsein ^¬ unit is equipped with at least one axial force generating spring element at one end of the motor shaft, wherein the spring element is arranged in at least one receptacle in the housing. The spring element is formed in a top view is substantially T-shaped and with egg ^¬ ner end plate and two-sided projections shipping ^¬ hen, wherein the end plate applied to the motor shaft and at least the projections in a receptacle of Gehäu ^¬ ses are arranged. The two projections are together ^¬ men with the end plate extending therebetween in plan view arranged on the drive unit largely transverse to the Mo ^¬ door shaft, in this way, the end plate located on the end face of the motor shaft under prestress against.

In the generic DE 10 2007 021 268 AI a spindle is accommodated in an axial and radial bearing, where ^¬ at the bearing holder is movably angeord ^¬ net in a housing. Furthermore, an elastic element is provided on the housing, which protrudes into the interior of the housing and biased acts on the bearing receptacle, that it is biased towards its intended position in the interior of the housing. With respect to a play-free storage of a spindle, the state of Technology not convincing. In particular, the solutions are coupled to part-consuming and elaborate, for example, laser welding method ^¬. This is where the invention starts. The object of the invention is to provide an improved storage of a spindle in an actuator. Ins ^¬ particular, it is an object of the invention to provide a structurally simple, adaptable and easy to mount Fe ^¬ derelement to ensure a safe Spielaus- equal at different loads and / or Tempe ^¬ temperatures.

The object is achieved by the features of ^independent claim 1. Advantageous embodiments of the invention are specified in the subclaims. It should be noted that in the following be ^¬ signed embodiments are not limiting, but any variations of the features described in the description and the dependent claims are possible.

According to claim 1 the object of the invention is achieved in that an actuator for a motor driving ^¬ imaging is provided comprising a housing, in particular of a housing shell and a housing cover, an electrical drive, said movable means of the electrical ^¬ rule drive an adjusting means is and the adjusting means ^¬ at least by means of a spindle drive is movable ^¬ and the spindle under prestress in a bearing holder is durable, wherein the bias voltage generated by means of an insertable into the housing spring element is. The inventive design of Stellan ^¬ drive is now created the opportunity to put the spindle of the actuator under bias, wherein the spring element as a separate component in the housing insertable ^¬ bar or can be inserted. Due to the separation of the Fe ^¬ derelementes the spring element can be adapted to individual requirements on ^¬ and is thus flexible adaptable to the requirements of the actuator. In particular ^¬ sondere different spring constants and / or lash adjusters can thus be made, which he ^¬ possible to use the actuator for different applications ^¬ areas, at the same time a sufficient ^¬ the lash adjuster and a sufficient bias ge ^¬ gen the spindle is achieved.

Due to the interchangeability or the possibility of inserting the spring element in the housing, it is also possible to mount the spring element independently of the spindle and the other components of the actuator, on the one hand a possible maintenance erleich ^¬ tert and on the other hand, an adaptability of Federelemen ^¬ tes to the requirements of the actuator. In this case, for example, depending on the application, an un ^¬ ferent spring element can be used, that is, depending on the required bias individual Fe ^¬ derelemente can be mounted. An adaptability is thus given.

Actuators are used in motor vehicles where, for example, movements on or in the motor vehicle are he ^¬ required. For example, an actuator can be used as Zuziehantrieb for a motor vehicle lock, wherein the spindle then moves an adjusting means, for example, in turn with a Bowden cable ^¬ acts or is directly connected to a lever mechanism of Zu ^¬ ziehantriebs. Actuators can also be used where simple positioning movements are required. For example, actuators for closing flap covers or hoods turned ^¬ sets can be. A preferred area of application is tank ^¬ fold closures. But it can also be made locks, such as on a rear seat ^¬ bank or flaps or covers to secure them against thief ^¬ steel.

The actuators have a housing which is preferably designed as a plastic injection-molded component. Before ^¬ be formed Trains t the case of a housing shell and a housing cover. Game, the components of the actuator such as micro- be rosch old and electric motor placed in the housing shell at ^¬, wherein the housing or the housing shell can also serve to accommodate other loading ^¬ setting compositions. By means of the housing cover, the housing is preferably sealed watertight. At the same time, the housing cover may also for fixing other components or as housing for the In ^¬ play the adjusting means, the spindle or shaft which ^¬ nen.

The housing cover can serve in a preferred embodiment ^¬ form also for securing the position of the spring element. In this case, formations and / or extensions on the Housing cover cooperate with formations, elevations and / or exten ^¬ ments in the housing shell and thus form, for example, bearings or fixings. Before Trains t ^¬, the housing lid has at least one elevation and / or extension which is engageable with the housing in such a ^¬ cup engages the spring element in the housing is fixable. In this way a defined La ^¬ delay of the spring element is ensured in the case. At the same time, the housing cover may also serve for alignment of the spring element in the housing so that a defi ned ^¬ alignment and thus a reliable func ^¬ kidney of the spring element is ermöglichbar.

The electric drive is preferably an electric drive used. Here, direct current motors ^¬ are preferably used with clockwise and counterclockwise rotation, as they are used in conventional motor vehicles and in particular actuators. An electrical drive ^¬ can thereby cooperate for example with a worm gear, wherein at least a part of the worm drive ^¬ can be formed integrally with the spindle. It is to the output shaft of the motor, a screw arranged ^¬ engages in a worm wheel of the spindle and therefore a torque can be transferred to the spindle, the. With the left and right rotation can then be on the spindle ^¬ arranged adjusting means are moved.

Of course, depending on the movement to be generated, that is to say the path and the force to be generated, it is also conceivable to couple a transmission directly to the output of the electric drive and to connect the spindle to the output shaft. to power. The spindle or the spindle drive moves an adjusting means. The adjusting means may be mounted directly on the spindle of the spindle drive, but it is also conceivable that the spindle drive is in turn coupled to a lever, which then forms, for example, a part of a Zuziehantriebs.

All these actuators is the fact that the adjusting drive ^¬ different requirements subject. On the one hand, a backlash as possible positioning of the spindle is to be ensured, and at the same time be a ge ^¬ räuscharmer run achievable. In addition, under ^¬ is the actuator temperature fluctuations, in turn, thus affecting in particular in a design of the actuator of mostly plastic components to the strain and the tolerances in the actuator. Thus, a play-free movement of the spindle on the one hand be produced at the same time will offset tolerances who can ^¬. Through the use of a spring element, a bias voltage can be generated in the spindle so that the spindle is held under prestress and can yaw to Tempe ^¬ ing temperatures and stresses by the drive rea ^¬. It is ensured by the inventive design of the spring element, that at any time and under different environmental conditions, a sufficient bias voltage is achievable, gleichzei ^¬ tig is a lowest possible friction in the spindle infeed ^¬ bar, so that a low-friction running of the spindle are ge ^¬ ensured can. In a preferred embodiment of the invention, an advantage is achieved if at least one axial end of the spindle is held in such a way in a bearing receptacle that an axial clearance compensation is possible. As laser geraufnahme it can serve, for example, a hole in Ge ^¬ housing into which an axial end of the spindle is a ^¬ feasible. Essential for the invention is that at least a part of the axial end protrudes from the Lageraufnah ^¬ me or the axial end releases such that the spring element with the axial end of the spindle together can ^¬ menwirken. Specifically, a force in the axial direction can be directed to the spindle by means of the ^¬ Federele ^¬ mentes. Preferably at least one Federele ^¬ ment is arranged at one axial end of the spindle. But it can also be arranged at each of the axial ends of the spindle, a spring element. It is also conceivable that the axial end of the spindle is inserted in a web of the hous ^¬ seschale, wherein in the web a groove or a bore can be introduced, so that the spindle end in the web and / or the web and the housing cover is storable , At any given time is by means of the Federele ^¬ mentes an axially acting force in the spindle infeed ^¬ bar. Preferably, the spring element is made of a spring steel ge ^¬ . The design of the spring element of a Fe ^¬ derstahl and as a separate component has the advantage that over the lifetime of a reliable generating a bias voltage can be achieved. In addition, can be achieved by selecting the material a suitable Fe ^¬ dervorspannung. In addition, steel is form- bar, which in turn facilitates an adaptability of the spring element to the conditions in the actuator and he ^¬ allows. Advantageously, the spring element can be formed as a sheet ^¬ strip. A metal strip is inexpensive to produce and adaptable to the spindle or axial end of the spindle. In addition, a shape and on ^¬ fit a metal strip to the geometric installation conditions in the housing is easily adaptable. The training as a metal strip also offers the advantage that at the same time a mounting fuse is possible. The training as an elongated transverse to the axis arranged, that is, in the direction of the housing shell extending metal strip allows at the same time to make a Montagesi ^¬ insurance such that incorrect assembly of the spring element can be excluded. This increases the Monta ^{¬ security} and thus the quality of the actuator. In a further embodiment variant, the sheet metal strip ^¬ at least one formation in the direction of the spinning ^¬ del, wherein the formation with the spindle, insbeson ^¬ particular can be brought to a shaft end of the spindle in engagement. By a shaping in the metal strip in this case the possibility is created on the one hand form the metal strip such that a clearance compensation is possible by deforming the sheet ^¬ strip and at the same time ^¬ the spindle can be held under bias who ^¬ the. In particular, the shape of the spring constant of the sheet metal strip can be adjusted, with a molding increases the rigidity of the metal strip. Preferably, the metal strip is deformed starting from a housing receptacle in the direction of the spindle, so that there may be a labelable as a bridge-like sheet metal strip. Preferably, the sheet metal strip is located with a flat surface against the spindle end. The metal strip can completely cover the shaft end.

Advantageously, it may also be, when the sheet metal strip to ^¬ least one further bevel, in particular a further fold in an end region of the sheet metal strip has ^¬. By a multiple molding and / or folding of the metal strip or the spring element, the possi ^¬ probability is created to safely position the spring element in the housing. In this case, the fold serve to jewei ^¬ then ends the sheet metal strip to establish a form closure between the housing and the spring element. From a combination of bending and shaping thus a cross-sectional shape of the metal strip described as M-shaped can be produced, which on the one hand si ^¬ cheres positioning and storage of the metal strip in Ge ^¬ housing allows and on the other hand can initiate a bias in the spindle.

Advantageously, the shaping can thereby generate the forward voltage and at the same time serve for a same ruled ^¬, for example, when the spindle due to temperature differences undergoes an elongation. It is thus ensured at all times that the spindle is securely received in the housing and is stored under bias in the housing. Thus, on the one hand safe storage of the spindle can be ensured and at the same time bearing noise can be suppressed. Due to the advantageous embodiment of Blechstrei ^¬ fens beyond a minimum of bearing friction between ^¬ rule metal strip and spindle can be made.

The spring element is a form fit in the housing INSERT ^¬ bar, this results in an advantageous Ausgestaltungsvari ^¬ ante the invention. A positive connection between the spring element and the housing is preferably present at the radial ends of the sheet-metal strip. For this purpose, the housing and / or the metal strip may have a corresponding shape and / or, for example, have securing elements with which the metal strip can be clipped into the housing, for example. But it is also conceivable that the metal strip by means of a fit, in particular a press fit, can be inserted into the housing, thus ensuring a secure fixing of the sheet metal strip in the housing to ge ^¬ .

A further preferred embodiment results when the spring element can be inserted into the housing shell and can be fixed by means of the housing cover. The Introductor ^¬ gen of the spring element is facilitated in that the spring element is inserted into the housing with play. If the sheet metal strip or the spring element is inserted into the housing, or inserted into the housing shell, in such a way that it is still gripped, for example, to an operator, so a manual and light Mon ^¬ animals can be ensured. The setting of the Federele ^¬ Mentes then takes place through the housing cover. In this case, the housing cover, the spring element in turn positively take and / or position in the housing such that the spring element assumes its fixed end position only when the housing cover is firmly connected to the housing shell ^¬ the. For this purpose, the sheet metal strip and / or the housing shell with the housing cover can be brought positively into a ^{handle ¬} .

Is a width of the metal strip is greater than or equal to ei ^¬ nem diameter of a shaft end of the spindle, this results in a further advantageous embodiment variant of the invention. By a width of the sheet-metal strip, which corresponds to ^{¬ at} least the diameter of the voltage applied to the sheet metal strip shaft end, a full system of the shaft end can be ensured on the sheet metal strip. By a full system of the shaft end on the metal strip, a uniform power transmission between the shaft end and spring element ensures ^¬ who. It should be noted that the conical shaft end also, for example, that is, can be trained tapering Det to testify the least possible friction between the shaft end and the biasing ^¬ sheet metal strip to it. Preferably, the sheet metal strip is formed of spring steel, so that due to a material pairing of plastic stem and steel sheet metal strip from low frictional losses is assumed. By erfindungsge ^¬ mäßen structure of the spring element can be ensured with simple con ^¬ structive means a secure biasing of the spindle. In the following, the invention will be described with reference to the attached drawings on the basis of a preferred embodiment. explained in more detail. However, it is the basic ^¬ rate that the embodiment does not limit the invention, but merely represents an embodiment. The illustrated features may be performed individually or in combination with other features of the specification as well as the claims individually or in combination.

a top view in a three-dimensional view of an actuator without egg ^¬ nen housing cover with an electrically driven ^¬ spindle and an actuating means; and a detailed view of the inventively designed actuator with a Fe ^¬ derelement which acts against a shaft end of the spindle.

In the figure 1, an actuator 1 is in a dreidimen ^¬ sional representation on the housing shell 2 wiedergege ^¬ ben. The housing 3 is shown without housing cover to illustrate the invention. The actuator 1 has an electric drive 4, a spindle 5, a control ^¬ medium 6, a microswitch 7, a Bowden cable 8, electrical contacts 9 and elastic fastening means ^¬ 10, wherein the elastic fastening means 10 mounted in extensions 11 of the housing shell 2 are. The spindle 5 has an integrally formed on the spindle 5 worm wheel 12, wherein the worm wheel cooperates with a mounted on the output shaft 13 of the electric drive on ^¬ 4 screw.

By the electric drive 4, the worm wheel 12 can be driven in both directions of movement, so that the adjusting means 6 and thus the Bowden cable 8 in the direction of the arrow P along the spindle 5 is adjustable. The BEWE ^¬ supply of the actuating means 6 is detected by means of the microswitch. 7 The microswitch 7 as well as the electrical see contacts 9 for the electric drive 4 may be connected, for example, with an inte ^¬ grated in the housing shell 2 electrical trace, the electrical traces 14 by means of a plug 15 are contacted.

An axial end 16 of the spindle 5 is received in a formed as a rib 17 storage 18. The rib 17 and the bearing point 18 for the axial end 16 of the spin ^¬ del 5 is integrally formed with the housing shell 2. The axial end 16 is biased against the spring element 19 shown in FIG.

The spring element 19 is positively inserted into the Gehäusescha ^¬ le 2. In this case 20, the spring element 19 Ausfor- rules, which run in a flat contact area 21 made ^¬ so that a flat surface 21 for installation of the axia ^¬ len end is available sixteenth At the lateral ends 22, 23 of the sheet metal strip 19 bends are provided which allow a secure fixing of the spring element 19 in the housing shell 2. The positive connection is positively formed by elevations 26, 27 in the housing shell 2 added. The elevations 26, 27, the formation 20 and the folds 24, 25 allow a secure hold of the spring element 19 in the housing shell. At the same time, the spring element 19 is fixed in the housing shell 2 such that a bias in the spindles 5 einleit ^¬ bar.

If, for example, as a result of heating to an elongation of the spindle 5, so the spindle 5 expands in the direction of the arrow PI. This expansion is absorbed by the spring element 19 and it is at the same time ge ^¬ ensures safe storage of the spindle 5 in the actuator.

LIST OF REFERENCE NUMBERS

1 actuator

2 housing shell

3 housing

4 electric drive

5 spindle

6 adjusting agents

7 microswitches

8 Bowden cable

9 electrical contacts

10 elastic fastening means

11 extension

12 worm wheel

13 output shaft

14 electrical tracks

15 plugs

16 axial end

17 rib

18 storage

19 spring element

20 shape

21 contact area, flat surface 22, 23 lateral ends

24, 25 fold

26, 27 surveys

P arrow

PI arrow

Claims

claims

1. actuator (1) for a motor vehicle comprising a housing (3), in particular of a housing shell (2) and a housing cover, an electric drive (4), wherein by means of the electric drive (4) a Stellmit ^¬ tel (6) movable is, and the adjusting means (6) at least by means of a spindle drive (4, 12, 13) is movable and the spindle (5) under prestress in a Lagerauf ^¬ acquisition (18) is durable, characterized in that the bias by means of a in the Housing insertable Fe ^¬ derelementes (19) can be generated.

2. actuator (1) according to claim 1, characterized marked ^¬ characterized in that at least one axial end (16) of the spin ^¬ del (5) is held in the bearing receptacle (18) that an axial clearance compensation is possible.

3. actuator (1) according to one of claims 1 or 2, characterized in that the spring element (19) is formed of a spring steel.

4. actuator (1) according to one of claims 1 to 3, characterized in that the spring element (19) as

Sheet metal strip (19) can be formed.

5. actuator (1) according to claim 4, characterized marked ^¬ characterized in that the metal strip (19) has at least one formation (20) in the direction of the spindle (5), where ^¬ in the formation (20) with the spindle (5) , especially a shaft end (16) of the spindle (5) is engageable ^¬ bar.

6. actuator (1) according to one of claims 4 or 5, characterized in that the metal strip (19) for ^{¬ at} least one further fold (24, 25), in particular ei ^¬ ne further fold (24, 25) in an end region ( 22, 23) of the sheet metal strip (19).

7. actuator (1) according to one of claims 1 to 6, characterized in that the spring element (19) form ^¬ conclusive in the housing (3) can be inserted.

8. adjusting element (1) according to one of claims 1 to 7, characterized in that the spring element (19) in the

Housing shell (2) can be inserted and by means of the housing ^¬ cover can be fixed.

9. An actuator (1) according to one of claims 4 to 8, characterized in that a width of the Blechstrei ^¬ fens (19) is greater than or equal to a diameter of a Wel ^¬ lenendes (16) of the spindle (5).

10. Actuator (1) according to one of claims 1 to 9, characterized in that the spring element (19) is fixable with ^{¬ means of} the bearing cap.