DE102016222715A1 - Gear arrangement with blocking function - Google Patents

Abstract

Spur gear stages as parts of gears usually have two spur gears, which are engaged with each other, wherein one of the spur gears forms a drive and the other spur gear an output. In this way, it is possible to translate on the one hand an applied torque or to undercut and / or to transmit the torque 1: 1. In some applications, however, a persistent transmission is e.g. In the sense of an endless rotation of the output not provided, but rather serve as a stepper gear, wherein via the actuator an adjusting movement is introduced and transmitted via the output to an actuator, so this occupies a control position. It is proposed a gear assembly 1 with a drive wheel 2, which is rotatably disposed about a drive shaft 6 and which has a drive gear portion 8a, b in the direction of rotation, with a driven portion having a driven gear portion 15, the drive gear portion 8a, b and the driven gear portion 15 by a rotation of the drive wheel 2 are engageable with each other such that the transmission assembly 1 is in a drive state, the drive wheel 2 having a drive locking portion 9a, b and the driven portion having an output locking portion 131, b, the drive locking portion 9a, b and the driven locking portion 13a, b being further D tion of the drive wheel 2 are engageable with each other, so that the gear assembly 1 is in a locked state, wherein the output member is formed as a linear rail 3.

Description

The invention relates to a gear arrangement with blocking function with a drive wheel, which is arranged rotatably about a drive shaft and which has a drive gear section in the circumferential direction, with a driven part, which has a driven gear portion, wherein the drive gear portion and the driven gear portion engageable with each other by a rotation of the drive wheel are such that the gear assembly is in a drive state, wherein the drive wheel has a drive and the driven portion Entreibssperrabschnitt, the drive and the output cut-off section are engageable by a further rotation of the drive wheel with each other, so that the gear assembly is in a locked state.

Spur gear stages as parts of gears usually have two spur gears, which are engaged with each other, wherein one of the spur gears forms a drive and the other spur gear an output. In this way, it is possible to translate on the one hand an applied torque or to undercut and / or to transmit the torque 1: 1. In some applications, however, a persistent transmission is e.g. In the sense of an endless rotation of the output not provided, but serve such transmission as a step gear, wherein via the actuator an adjusting movement is introduced and transmitted via the output to an actuator so that it occupies a parking position. As soon as the adjusting movement has taken place, the gear should hold the setting position. For example, brakes that frictionally secure the transmission or locking elements, such as a brake, can be used to hold the parking position. Lock contours or pin locks, are used, which secure the gearbox form-fitting. In addition, externally controlled pneumatic, hydraulic or electric locks are used.

Another way is the document DE 10 2014 209 939 A1 , which forms the closest prior art. In this document, a gear arrangement is proposed for a spur gear, which is brought by a rotation of the drive wheel alternately in a drive state and in a locked state.

It is an object of the invention to propose a further development for a gear arrangement with a blocking function. This object is achieved by a gear arrangement with the features of claim 1. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

In the context of the invention, a transmission arrangement is proposed, which is designed for transmitting an adjusting movement and for implementing a blocking function. The gear arrangement is formed in a preferred embodiment as an electromechanical actuator, in particular as an electric motor driven linear drive, and comprises in this preferred embodiment, an electric motor for driving the adjusting movement. Optionally, the gear arrangement may have further gearboxes as pre-translation after the electric motor and / or before the linear drive.

The gear arrangement has a drive wheel, which is arranged rotatably about a drive axis. In particular, the drive wheel is at least directly operatively connected to the electric motor or operatively connected, so that a drive torque of the electric motor can be transmitted to the drive wheel. The drive wheel is formed with a drive toothing section in the direction of rotation about the drive axis with a drive toothing, wherein the drive toothed section preferably has radially outwardly facing drive teeth as the drive toothing. The drive wheel is in the drive toothing section particularly preferably circular and / or formed as a spur gear. In particular, the drive toothing of the drive toothing section is arranged on a first pitch circle radius.

In addition, the gear assembly includes a driven part The driven part has at least partially on a driven gear teeth with output teeth. The output gear is arranged at least in sections in one or more output gear section or sections.

The drive gear section and the driven gear section can be brought together by a rotation of the drive wheel in a particular meshing engagement. The gear assembly is in a drive state when the output gear portion and the drive gear portion mesh with each other and / or engage with each other.

The drive wheel also has a drive locking section in the direction of rotation and the driven part has at least one driven-off section. The drive-locking portion and the driven-off portion can be engaged with each other by further rotation or further rotation of the drive wheel from the driving state, so that the gear assembly is in a locked state. In particular, in the locked state of the gear arrangement, the drive-locking section and the driven-off section form a form-locking arresting safeguard, in particular for the driven part, in particular only for the driven part, wherein the drive wheel remains permanently rotatable.

In particular, the gear assembly is formed so that upon rotation of the drive wheel in a rotational direction, first the drive state is assumed, wherein the drive gear portion and the output gear portion are engaged with each other and the drive wheel drives the driven part. In a further rotation of the drive wheel of the drive and the Abtriebssperrabschnitt be brought into operative connection, so that the gear assembly is in the locked state. It is particularly provided that during a rotation, in particular in an endless rotation, of the drive wheel in a rotational direction, the gear assembly is alternately in the drive state and the lock state can be brought.

It is thus achieved that the gear arrangement alternately transmits an actuating movement in the drive state and converts in the locked state, in particular a positive locking safety device. Depending on the number of drive gear sections and drive locking sections on the drive wheel and driven gear sections and output sections on the driven part a stepwise adjustment of the driven part with a freely selectable number of stages and at the same time a form-locking standstill between stages is implemented.

In particular, a positive rotation is realized, which requires no further actuator, no further control device or energy for standstill.

In the context of the invention, it is proposed that the output part is designed as a linear rail. The output gear portion extends as an output gear along the linear rail. The output cut-off sections or those are lined up along the longitudinal extent of the linear rail. In particular, the gear arrangement is designed as a self-locking linear gear and / or a self-locking linear axis. The transition from a rotary gearbox to a linear gearbox extends the range of applications.

In a preferred constructional realization of the invention, the drive state is canceled in the locked state. Upon rotation of the drive wheel in the locked state, therefore, the driven member is not displaced relative to the drive wheel but remains stationary relative to the drive wheel. In other words, the transmission ratio in the locked state from the drive wheel to the driven part is infinitely large, since an angle change of the rotational angle of the drive wheel does not lead to a translation of the driven part.

In a preferred embodiment of the invention, the drive-locking section is formed in an axial plan view as a positive contour, in particular a convex contour, and the driven-off section as a negative contour, in particular a concave contour. The positive contour takes in a preferred embodiment of the invention in the axial plan view with respect to the drive axis a circular arc-shaped active contour whose center is defined by the drive axis and its radius by the distance to the drive axis. In contrast, the output contour is formed in the axial plan view with respect to the drive axis as a circular arc-shaped counteracting contour, wherein the center lies on a circle around the drive axis in the locked state, and wherein the radius is formed by the distance to the drive axle in the locked state.

Thus, in the blocking state, the circular-arc-shaped active contour lies in the circular-arc-shaped counteracting contour, wherein the radius of the circular arc-shaped counteracting contour is equal to or greater than the radius of the circular arc-shaped active contour. Now, if the drive wheel is rotated about the drive axis, so the positive contour rotates in the negative contour, without taking the driven part. The transmission of a translational movement of the driven gear on the drive part is locked in the locked state and / or impossible.

In a preferred structural embodiment of the invention, the gear arrangement forms a toothed differential gear and axially offset to a Sperruntergetriebe. The gear sub-transmission includes the drive gear portion and the output gear portion and the ratchet gear, the drive gear portion and the output cut-off portion. Particularly preferably, the toothed under gear and the locking lower gear are arranged offset in the axial direction parallel to each other. In this embodiment, the functions "drive-locks" are separated from each other axially and thus decoupled.

In particular, in a further development of this constructive embodiment, it is preferred that in an axial plan view of the drive wheel, the drive toothing section extend over a drive toothing angle and the drive cut section via a drive locking angle in the circumferential direction about the drive axis.

In principle, the gear arrangement can have exactly one drive toothing section and / or exactly one drive cut section. In a preferred embodiment of the invention the drive wheel at least or exactly two drive gear sections and / or at least or exactly two drive locking sections. Thus, at least or exactly twice the drive state and at least or exactly twice the locked state per revolution of the drive wheel.

In a preferred development of the invention, the drive teeth sections are arranged between the drive block sections relative to the axial extension of the drive axle, in particular so that these engage around the drive tooth sections on both sides or in the manner of a bracket. Alternatively or additionally, based on the axial extent of the drive axle, the output gear sections are arranged between the output cut-off sections, in particular so that these engage around the output gear sections on both sides or in the manner of a clip. For example, control ribs can be arranged on both sides of the output gear sections, on which the output gear sections are arranged. Thus, two Sperruntergetriebe are formed by the Abtriebssperrabschnitte and the drive locking. Preferably, the output cut-off portions of the two locking lower gear are arranged offset to one another in the longitudinal extension to the linear rail, so that alternately sets the one and subsequently the other locking lower gear the blocking state.

It is preferred that the output part has a plurality of output cut-off sections. The number of multiple output cut-off sections corresponds to the number of stages of possible form-locking standstill safeguards in the longitudinal extent of the linear rail. In an axial plan view with respect to the drive axis, the output cut-off sections are offset in the longitudinal extension in each case by a developed drive tooth angle, so that the output cut sections are separated from one another in the longitudinal direction.

The output gear sections may be formed as subsections, but it is also possible that the output member has a continuous in the longitudinal direction of the output gear, which form the plurality of output gear sections.

It is envisaged that the number of teeth of the drive gear portion is tuned to the number of teeth of one of the output gear portions, so that the drive and driven part are forced to each other, wherein the positive guide is designed so that upon rotation of the drive wheel of the gear assembly inevitably alternately Locked state and the drive state are taken.

• - Türöffner und Türschließer mit integrierter Feststellbremse für Fahrzeugtüren inkl. Flügeltüren (Stell- und Verriegelungsmechanismen)
• - Stell- und Verriegelungsmechanismen für Schiebe-, Hub- und Ausstelldächer
• - Stell- und Verriegelungsmechanismen für Spoiler-Konstruktionen
• - Stell- und Verriegelungsmechanismen für Kühlergrillverschluss
• - Feststellmechanismus zum Halten einer bestimmten Tür- oder Klappenposition

In a preferred embodiment of the invention, the gear arrangement is as an electromechanical actuator, eg for actuators or actuation and locking units for linear movements, as they occur at various points in motor vehicles. These concern in particular:

• - Door opener and door closer with integrated parking brake for vehicle doors incl. Hinged doors (positioning and locking mechanisms)
• - Positioning and locking mechanisms for sliding, lifting and tilting roofs
• - Positioning and locking mechanisms for spoiler constructions
• - Locking and locking mechanisms for grille shutter
• - Locking mechanism for holding a specific door or flap position

• 1 eine schematische, dreidimensionale Darstellung einer Getriebeanordnung als ein Ausführungsbeispiel der Erfindung in einem Sperrzustand;
• 2 eine schematische, dreidimensionale Darstellung der Getriebeanordnung der 1 in einem Betriebszustand;
• 3 eine schematische, dreidimensionale Darstellung der Getriebeanordnung der 1 in einem weiteren Sperrzustand;
• 4 eine schematische, dreidimensionale Darstellung der Getriebeanordnung der 1 in einem weiteren Betriebszustand.

Further features, advantages and effects of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. Showing:

• 1 a schematic, three-dimensional representation of a gear arrangement as an embodiment of the invention in a locked state;
• 2 a schematic, three-dimensional representation of the transmission arrangement of 1 in an operating condition;
• 3 a schematic, three-dimensional representation of the transmission arrangement of 1 in another blocking state;
• 4 a schematic, three-dimensional representation of the transmission arrangement of 1 in a further operating state.

The 1 shows a schematic three-dimensional representation of a gear arrangement 1 as an embodiment of the invention. The gear arrangement 1 has a drive wheel 2 and a driven part which acts as a linear rail 3 is trained on. The drive wheel 2 For example, with an electric motor, not shown 4 connected, the linear rail 3 is in a manner not shown, for example, with a locking mechanism 5 connected.

In this embodiment, forms the gear assembly 1 an electromotive actuator which is used, for example, to implement an actuating movement in an automatic door closer or door opener.

The drive wheel 2 is about a drive axle 6 rotatable, the linear rail 3 along a linear direction 7 arranged translational or linearly displaceable. In a projection from above, the drive axle cuts 6 the linear direction 7 at right angles.

The drive wheel 2 comprises two drive teeth sections 8 a, b, in each of which a drive toothing is arranged with radially outwardly facing teeth. The drive gear sections 8 a, b do not extend fully around the drive axle 6 but are limited to a drive gearing angle which in the present example is about 60 degrees. The drive gear sections 9a , b are arranged offset from each other by 180 degrees.

Furthermore, the drive wheel 2 on each axial side of a drive locking portion 9 a, b, which respectively occupy a drive locking angle in the direction of rotation. The drive block sections 9a , b are to each other and to the drive teeth sections 8a , b arranged offset.

The drive block sections 9 are each formed as a positive contour and each have at the radial outer sides of a circular arc-shaped active contour 10a , b on, which are coaxial and concentric with the drive axle 6 runs, wherein the radius of the circular arc-shaped active contour 10a , b the distance to the drive axle 6 equivalent. The active contour 10 a, b is in each case formed as a flat material section, in particular as a sheet metal and / or metal and / or sintered section with a part-circular outer contour.

The drive teeth sections 8a , b and the drive block sections 9a , b are in the axial direction to the drive axle 6 considered axially offset from one another. In particular, the drive gear portions 8a , b disposed between the drive locking portions 9a, b.

The linear rail 3 has an output gear portion 15 on, as a continuous output gearing 11 with in the direction of the drive wheel 2 facing output teeth is formed. Furthermore, the linear rail comprises 3 on each side of the output gearing 11 a starboard 12 a, b, which is formed in this example as rails. The Steuerborde 12 a, b are parallel to the output gear 11 arranged.

In the drive wheel 2 facing edge portion of the Steuerborde 12 a, b are Abtriebssperrabschnitte 13 a, b introduced as negative contours, which are formed as a circular arc-shaped Gegenwirkkonturen 14 a, b and / or edge-side arcuate Aussparrungen in the Steuerborden 12 a, b as a carrier and each other in the linear direction 7 are spaced.

Steuerborde 12 a, b and output gearing 11 are in the axial direction to the output axis 7 arranged offset from one another. drive wheel 2 and linear rail 3 are coordinated, so that the drive gear sections 8a . b with the output gear 11 can mesh and forms a Verzahnungsuntergetriebe and the drive locking sections 9 a, b in the Abtriebssperrabschnitte 13a . b can engage and forms a Sperruntergetriebe.

Thus forms the gear arrangement 1 a possible embodiment of a self-locking gearbox with integrated adjustment and locking unit. The transmission consists of a drive wheel 2 and a linear output part, which is called the linear rail 3 is trained. The linear output part has centrally arranged the continuous internal toothing as output gear teeth 11 as it is known for example from racks. Left and right thereof two identically formed blocking contours are formed as tax aries 12 a, b arranged. These blocking contours each have circular arc-shaped recesses as output cut-off sections 13 a, b, which are arranged at a certain distance from each other. Both blocking contours are arranged offset to each other by exactly half the distance of these recesses in the embodiment shown.

The drive wheel 2 has centrally a front-toothing as a drive toothed portion, which in the mounted position in the continuous center mounted on the linear output member output gear 11 engages and thus ensures the drive ratio. This radial external toothing is formed only as a partial toothing, so that the toothing limited only to a certain area. This results in addition to the gearing itself and a certain untoothed section on the outside of the drive wheel 2 , Left and right of this partially toothed area are - as well as the linear output part - the two locking contours as the drive block sections 9a , b attached. These are exactly designed so that they can engage in the circular arc-shaped recesses on the linear output part. Both locking contours (left / right side) are identical and in the example shown mounted offset by 180 °. Other versions are however also conceivable.

This special arrangement of drive and locking contours now results in a linear drive, which works analogous to a stepping gear: combs the drive wheel during the drive phase or in the drive state with his Teeth in the rack or output gearing 11 of the linear output part, so that a linear adjusting movement can be achieved, as it is known from a classic rack.

But combs the locking contour of the drive wheel 2 in the corresponding recesses on the locking contours of the linear output part, so is the gear assembly 1 in the locked state, and there is no linear output movement. However, since the untoothed portion of the output gear is positioned exactly so that engage in this period, no teeth of the drive in the rack, despite locked linear motion, the drive wheel continues to be rotated. This ensures that a drive phase is reached again after each lock phase.

This condition is in 1 shown, here meshes with the drive wheel 2 attached radial locking contour as a drive locking section 9a exactly in the mounted on the linear output part linear locking contour as Abtriebssperrabschnitt 13a , This is the gear arrangement 1 locked, there is no transmission.

Thus, in the 1 the gear arrangement 1 shown in the locked state, wherein the drive locking section 9a in engagement with one of the output cutouts 13a stands. This is the gear arrangement 1 positively locked, with a small pivoting movement about the drive axle 6 to no displacement of the linear rail 3 relative to the drive wheel 2 leads. In particular, the active contour engages 10a positive fit into the counteracting contour 14a one. The drive gear sections 8a , b are disengaged from the output gearing 11 ,

After a certain angle of twist mesh the locking contours of the drive wheel 2 from the corresponding recesses on the linear output part. The only a certain section of the drive wheel 2 Comprehensive toothing is aligned relative to the associated blocking contours so that this (partial) toothing combs into the output toothing 11 of the linear driven part exactly at the time in which the blocking contours no longer engage with one another in a form-fitting manner. This is the gear assembly 1 now in the transmission phase or in the drive state. This condition is in the 2 shown, wherein in the drive state of the drive gear portion 8a in the output gear 11 intervenes. The drive block sections 9a , b are disengaged from the output cut-off portions 13 a, b.

As can be seen in particular from the 3 results, engages at the end of this transmission phase again one of the locking contours on the drive wheel 2 in a corresponding recess on the linear output part, at the same time, the partial toothing on the drive wheel 2 from the output gear 11 comb the linear output member, whereby the transmission movement is terminated and the gear assembly 1 is back in the locked state. In the locked state, the other drive locking portion 9b thus engages in the output locking portion 13b on the other side of the linear rail 3 one. The drive gear sections 8a , b are disengaged from the output gearing 11 ,

Ultimately, this always results in a reciprocal operation of drive phase or - state and lock phase or state, resulting in continuous rotation of the drive wheel 2 a stepwise linear movement of the output part results. 4 shows the gear assembly in the subsequent phase of movement, wherein in the drive state of the drive gear portion 8b in the output gear 11 intervenes. The drive block sections 9a , b are disengaged from the output cut-off portions 13 a, b.

LIST OF REFERENCE NUMBERS

1

transmission assembly

2

drive wheel

3

linear rail

4

electric motor

5

locking mechanism

6

drive axle

7

linear direction

8a, b

Drive gear portion

9a, b

Drive blocking portion

10a, b

active contour

11

Teeth / output teeth

12a, b

control Borde

13a, b

Output blocking portion

14a, b

Buck contour

15

Output gear portion

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014209939 A1 [0003]

Claims (10)

Gear arrangement (1) with a drive wheel (2), which is arranged rotatably about a drive axle (6) and which has a drive gear section (8a, b) in the direction of rotation, with a driven part, which has an output gear section (15), wherein the drive gear section (15) 8a, b) and the driven gear portion (15) are engageable with each other by rotation of the drive wheel (2) so that the gear assembly (1) is in a driving state, the drive wheel (2) having a drive locking portion (9a, b) and the driven part has an output blocking portion (13a, b), wherein the drive locking portion (9a, b) and the driven locking portion (13a, b) are engageable with each other by further rotation of the driving wheel (2) so that the gear assembly (1) is engaged with a blocking state, characterized in that the output part is formed as a linear rail (3). Gear arrangement (1) according to Claim 1 , characterized in that upon rotation of the drive wheel (2) the gear assembly (1) is alternately in the drive state and the lock state can be brought. Gear arrangement (1) according to Claim 1 or 2 , characterized in that the drive state is canceled in the locked state, so that in the locked state upon rotation of the drive wheel (2), the linear rail (3) remains stationary relative to the drive wheel and / or that in the locked state, the transmission ratio of drive wheel (2 ) to the linear rail (3) is infinitely large. Gear arrangement (1) according to one of the preceding claims, characterized in that the drive-locking section (9a, b) is designed as a convex contour and the driven-off cut-away section (13a, b) is designed as a concave contour. Gear arrangement (1) according to Claim 4 , characterized in that the convex contour in the axial plan view of a circular arc-shaped active contour (10a, b), wherein the center of the circular arc-shaped active contour (10a, b) by the drive axis (6) and the radius of the circular arc-shaped active contour (10a, b) is defined by the distance to the drive axle (6). Gear arrangement (1) according to Claim 5 , characterized in that the concave contour in the axial plan view, a circular arc-shaped counter-acting contour (14a, b), wherein the center of the circular arc-shaped counter-acting contour (14a, b) in the locked state on a circle around the drive axis (6) and the radius of circular arc-shaped counter-acting contour (4) is defined in the blocking state by the distance to the drive axle (6). Transmission arrangement (1) according to any one of the preceding claims, characterized in that the gear arrangement (1) in the axial direction, a toothed differential gear and axially offset forms a Sperruntergetriebe, wherein the Verzahnungsuntergetriebe the Antriebsverzahnungsabschnitt (8a, b) and the output gear portion (15) and the locking lower gear has the drive-locking portion (9a, b) and the driven-off portion (13a, b). Gear arrangement (1) according to one of the preceding claims, characterized in that the drive wheel (2) has at least or exactly two drive gear sections (8a, b) and / or at least or exactly two drive block sections (9a, b). Gear arrangement (1) according to Claim 8 characterized in that the drive gear portions (8a, b) are disposed between the drive cut portions (9a, b) and / or the output gear portions (15) are disposed between the output cut portions (13a, b). Gear arrangement (1) according to one of the preceding claims, characterized in that it is designed as an electromechanical actuator with an electric motor (4).

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