Drive, in particular spindle drive, for adjusting a closure element of a motor vehicle

Abstract

The invention relates to a drive, in particular a spindle drive, for adjusting a closure element (3) of a motor vehicle (4), wherein: the drive (2) has an electric drive motor (8), a drive housing (13) and a cable grommet (1); the cable grommet (1) has a body-side cable grommet connection (16), a drive-side cable grommet connection (17), and a protective tube (18) extending from the body-side cable grommet connection (16) to the drive-side cable grommet connection (17) along a geometric centerline (M); and a guide channel (19) for at least one electrical line (20) to pass through extends through the body-side cable grommet connection (16), the drive-side cable grommet connection (17) and the protective tube (18). The invention proposes that: the drive-side cable grommet connection (17) has a multi-part design with an axial protective tube portion (21) and with a clamping sleeve (22) secured axially to the drive housing (13); the protective tube portion (21) is inserted from the outside into a housing clamping portion (24) formed by a housing opening (23) of the drive housing (13), and the clamping sleeve (22) is inserted from the inside into the housing clamping portion (24), such that the protective tube portion (21) and clamping sleeve (22) axially overlap in the housing clamping portion (24); and the protective tube (18) has a tube wall (25), and in the region of the protective tube portion (21), the tube wall (25) is clamped radially between the clamping sleeve (22) and the housing clamping portion (24) or between two portions of the clamping sleeve (22).

Description

[0001] - -I -

[0002] Drive, in particular spindle drive, for adjusting a locking element of a motor vehicle

[0003] The present invention relates to a drive, in particular a spindle drive, for adjusting a closure element of a motor vehicle according to the preamble of claim 1 and to a cable grommet for an electric motor drive, in particular a spindle drive, for adjusting a closure element of a motor vehicle according to the preamble of claim 13.

[0004] The term "closure element" is to be understood broadly in this context. It includes, for example, a tailgate, a trunk lid, a hood, a side door, a cargo area flap, a window pane, a pop-up roof, or the like of a motor vehicle. The following focuses on the application of adjusting a tailgate of a motor vehicle.

[0005] Especially in the case of tailgate adjustment, the drive is located in a wet area, for example, to the side of a tailgate opening. This places particularly high demands on the drive with regard to preventing moisture from entering the drive housing.

[0006] The known prior art (DE 10 2020 131 723 A1), from which the invention is based, relates to a drive in the form of a spindle drive for adjusting a closure element of a motor vehicle, which drive comprises an electric drive motor, a drive housing with a housing cover, and a cable grommet. The cable grommet has a protective tube that extends from a body-side cable grommet connection to a drive-side cable grommet connection and allows the passage of at least one electrical cable leading from the motor vehicle to the drive motor of the drive.

[0007] It is a challenge to make the installation of the drive-side cable grommet connection as efficient as possible. The current state of the art connects the drive-side cable grommet connection to the housing cover using a plug-in connection. To prevent accidental removal from the housing cover, the drive-side cable grommet connection is positively secured by an engagement section on the ball socket of the drive connection. To do this, after inserting the drive-side cable grommet connection, the ball socket with the engagement section must be pushed sideways into the housing cover. To prevent moisture from penetrating the drive, the plug-in connection must also be sealed.

[0008] The invention is based on the problem of designing and developing the known drive in such a way that the assembly of the drive-side cable grommet connection is optimized.

[0009] The above problem is solved by the features of the characterising part of claim 1.

[0010] The fundamental consideration is that a clamping connection is provided with which the protective hose is held in place by friction. For this purpose, the protective hose is held in place by friction either between the clamping sleeve and the housing clamping section or between two radially spaced sections of the clamping sleeve. In the former case, in the assembled state, a constriction is provided between the clamping sleeve and the housing clamping section, which clamps the hose wall. To achieve this clamping, the radial outer side of the clamping sleeve, in particular of the sleeve main body described below, has a cross-sectional widening and / or the housing clamping section has a cross-sectional constriction, by means of which the clamping sleeve and the housing clamping section are prestressed against one another when the hose wall of the protective hose section is arranged between them.The preload force with which the clamping sleeve is then preloaded against the housing clamping section corresponds to the contact force with which the clamping sleeve, on the one hand, and the housing clamping section, on the other, press against the hose wall (clamping force). In the latter case, here and preferably, to effect the clamping, the two sections of the clamping sleeve are shaped such that they are preloaded against each other when the hose wall of the protective hose section is arranged between them. The preload force with which the two sections are then preloaded corresponds to the contact force with which one section, in particular the sleeve main body, and the other section each press against the hose wall.Such a clamp connection has the advantage that, in addition to the friction-based holding effect, which allows easy fixation of the protective hose to the drive housing, it also increases the tightness in the clamping area and can therefore make it difficult or even prevent the penetration of moisture into the interior of the drive or drive housing.

[0011] In detail, it is proposed that the drive-side cable grommet connection is designed in several parts with an axial protective hose section and a clamping sleeve that is axially secured to the drive housing, that the protective hose section is inserted from the outside into a housing clamping section formed by a housing recess of the drive housing and the clamping sleeve is inserted from the inside into the housing clamping section, so that the protective hose section and clamping sleeve axially overlap in the housing clamping section, and that the protective hose has a hose wall and the hose wall is radially clamped in the region of the protective hose section between the clamping sleeve and the housing clamping section or between two sections of the clamping sleeve.

[0012] Claim 2 relates to preferred embodiments of the clamping sleeve. Particularly preferably, a sleeve collar is provided, which serves for a positive, internal engagement with the drive housing and makes it difficult to remove the protective hose from the drive housing. Furthermore, the provision of a sleeve collar can increase the tightness, particularly if the sleeve collar is integrally connected to the drive housing, for example, by welding or gluing.

[0013] Claims 3 to 5 define a holding section of the clamping sleeve and specify particularly preferred embodiments thereof. This functional section allows the necessary contact force to be easily generated to securely hold the protective hose in a frictionally engaged manner, preferably between the clamping sleeve and the housing clamping section (claim 4) or between two sections of the clamping sleeve (claim 5). Claims 6 and 7 define further functional sections of the clamping sleeve, such as a section with a cross-sectional constriction and an insertion section. These additional functional sections allow the functionality of the clamping sleeve to be further optimized with regard to the clamping effect and assembly.

[0014] Claims 8 and 9 relate to particularly preferred variants of the coupling of the clamping sleeve to the drive housing, by means of which the removal of the protective hose from the drive housing can be made even more difficult.

[0015] In claims 10 and 11, the structure of the drive housing in the area of ​​the fastening of the protective hose is specified in more detail.

[0016] According to the particularly preferred embodiment according to claim 12, the protective hose is designed at least in sections in the manner of a corrugated hose, whereby the hose wall can be clamped particularly firmly.

[0017] According to a further teaching according to claim 13, which has independent significance, a cable grommet for an electric motor drive, in particular a spindle drive, for adjusting a closure element of a motor vehicle is claimed.

[0018] It is essential that the drive-side cable grommet connection is designed in several parts with an axial protective hose section and a clamping sleeve axially secured to the drive housing, that the protective hose section can be inserted from the outside into a housing clamping section formed by a housing recess in the drive housing, and that the clamping sleeve can be inserted from the inside into the housing clamping section, so that the protective hose section and clamping sleeve axially overlap in the housing clamping section, and that the protective hose has a hose wall and the hose wall can be radially clamped in the area of ​​the protective hose section between the clamping sleeve and the housing clamping section or between two sections of the clamping sleeve. Reference may be made to all statements regarding the proposed drive.

[0019] In the following, the invention is explained in more detail with reference to a drawing which merely represents exemplary embodiments. In the drawing,

[0020] Fig. 1 shows the rear area of ​​a motor vehicle with a proposed drive for adjusting a closure element, which has a proposed cable grommet,

[0021] Fig. 2 shows the drive according to Fig. 1 in an orientation a) with the locking element in the closed position and b) with the locking element in the open position,

[0022] Fig. 3 a detailed view of the proposed cable grommet as well as an enlarged detail showing the connection area of ​​the cable grommet and the drive housing of the proposed drive and

[0023] Fig. 4 shows, in an enlarged detail of the connection area corresponding to Fig. 3, a) a further embodiment of the proposed drive and b) yet another embodiment of the drive.

[0024] The cable grommet 1 shown in Figures 2 to 4 is a component of a drive 2, here a spindle drive shown in Figure 2, for adjusting a closure element 3 of a motor vehicle 4 (Figure 1). The closure element 3 here is preferably a tailgate. All statements regarding a tailgate also apply to all other types of closure elements 3 of a motor vehicle 4. In this respect, reference is made to the list of examples in the introductory part of the description.

[0025] The drive 2 serves to adjust the tailgate. For this purpose, the drive 2 is articulated via a first drive connection 5 to the closure element 3 on the one hand and via a second drive connection 6 to the vehicle body 7 on the other. Here, the drive 2 preferably generates linear drive movements along a geometric drive axis S, so that the closure element 3 can be adjusted between a closed position and the open position shown in Fig. 1. This adjustment is effected by means of an electric drive motor 8, which is part of a drive unit 9 of the drive 2 and generates a drive force that causes the adjustment of the closure element 3.

[0026] Here and preferably, the drive unit 9, connected downstream of the drive motor 8, has one or more further drive unit components such as an intermediate gear 10, for example a planetary gear, a brake 11, a clutch or the like.

[0027] Furthermore, a feed gear 12, which will be explained in more detail below, is connected downstream of the drive unit 9. The feed gear 12, together with at least the drive motor 8, in particular the entire drive unit 9, is arranged in a common drive housing 13 of the drive 2, which here and preferably is telescopic and in particular tubular. For this purpose, the drive housing 13 here has a particularly tubular, outer housing part 14 and a particularly tubular, inner housing part 15. The term "telescopic" in this context means that the outer housing part and the inner housing part 15 are displaceable relative to one another along the geometric drive axis S, wherein the inner housing part 15 is guided in the outer housing part.

[0028] Furthermore, the drive 2 has said cable grommet 1, as shown in the views in Figures 2 and 3.

[0029] The exemplary embodiment shown in the figures and which is preferred in this respect relates to a drive 2, in particular a spindle drive, for adjusting a closure element 3 of a motor vehicle 4, the drive 2 having an electric drive motor 8, a drive housing 13 and a cable grommet 1, the cable grommet 1 having a body-side cable grommet connection 16, a drive-side cable grommet connection 17 and a protective hose 18 extending from the body-side cable grommet connection 16 to the drive-side cable grommet connection 17 along a geometric center line M, a guide channel 19 for guiding at least one electrical line 20 through the body-side cable grommet connection 16, the drive-side cable grommet connection 17 and the protective hose 18.

[0030] It is now essential that the drive-side cable grommet connection 17 is designed in several parts with an axial protective hose section 21 and a clamping sleeve 22 that is axially secured to the drive housing 13. It is also essential that the protective hose section 21 is inserted from the outside, i.e. from the side that forms the environment of the drive 2 or drive housing 13 when the drive 2 is in the assembled state, into a housing clamping section 24 formed by a housing recess 23 in the drive housing 13, and that the clamping sleeve 22 is inserted from the inside, i.e. from the other side, into the housing clamping section 24, and in particular, due to its shape, can only be inserted from the inside. This is done in such a way that the protective hose section 21 and the clamping sleeve 22 axially overlap in the housing clamping section 24.Finally, it is also essential that the protective hose 18 has a hose wall 25 and that the hose wall 25 is radially clamped in the region of the protective hose section 21 between the clamping sleeve 22 and the housing clamping section 24 or between two sections of the clamping sleeve 22.

[0031] The drive-side cable grommet connection 17 is at least two-part, i.e. it is composed of at least two separately manufactured parts, namely here and preferably the protective hose section 21 on the one hand and the clamping sleeve 22 on the other hand.

[0032] A clamping sleeve 22 generally refers to a component with a structure (a material body) which, on the one hand, at least partially, preferably completely, surrounds a spatial section and thereby forms a passage for the electrical lines 20 in the axial direction, and, on the other hand, provides a material section which, in the assembled state, can press against the hose wall 25 in the radial direction, i.e., orthogonal to the axial direction, and generate said contact force or clamping force. A clamping sleeve 22 preferably has a tubular structure and, in particular, a round cross-section. The tubular structure then completely surrounds said spatial section, through which the electrical lines 20 are routed, and simultaneously enables the clamping function in question.

[0033] The clamping sleeve 22 is axially secured to the drive housing 13, so that the protective hose section 21, which is radially clamped in the assembled state, is securely held, even if it is only radially clamped between the sections of the clamping sleeve 22. "Axially secured" means held captively, preferably fixed (immovable), on or relative to the drive housing 13.

[0034] As mentioned, the housing clamping section 24 is formed by a housing recess 23 of the drive housing 13, i.e., the housing clamping section 24 is an axial section of the inner wall 26 of the housing recess 23.

[0035] When reference is made here and in the following to a “section” of the clamping sleeve 22, this always means a part of the clamping sleeve 22 which is otherwise designed in one piece with the clamping sleeve 22, i.e. the clamping sleeve 22 is manufactured in one piece.

[0036] The directions "axial" and "radial" here always refer to the direction in which the geometric center line M of the protective hose 18 runs and in which the protective hose section 21 is brought together with the clamping sleeve 22 during assembly.

[0037] As Figures 3 and 4 show, here and preferably the clamping sleeve 22 has a tubular, in particular substantially cylindrical, sleeve main body 27. Furthermore, here and preferably the clamping sleeve 22 has a sleeve collar 28 extending radially outward from the sleeve main body 27, in particular at the axial end.

[0038] "Tubular" here includes any cross-sectional shape, in particular a round cross-section.

[0039] In this context, "essentially cylindrical" means that the inside and outside of the clamping sleeve 22 are at least largely congruent with an imaginary cylinder, although deviations from the cylindrical shape are also permissible in certain sections, for example in the area of ​​a holding section 29 described below, or here also through the optional sleeve collar 28.

[0040] A "sleeve collar" 28 is here a radial extension, i.e. a collar-shaped section, which forms an axial stop for engagement with an inner housing shoulder 30 of the drive housing 13.

[0041] By "axial end" is meant an arrangement of the sleeve collar 28 at an axial end of the clamping sleeve 22, which in the assembled state lies outside the protective tube 18.

[0042] As already indicated above, the clamping sleeve 22 here and preferably, as the exemplary embodiments in Figures 3 and 4 illustrate, has a holding section 29 which, in the assembled state, projects radially toward the protective tube 18 at at least one point. Such a projecting point or such projecting points is or are provided here in order to exert a maximum contact force on the protective tube 18 at the contact point(s) between the holding section 29 and the protective tube section 21. "Maximum" means that the contact force exerted by the clamping sleeve 22 on the protective tube 18 is at its highest here, thus generating the significant part of the holding effect here.

[0043] "Protrudes" means that the clamping sleeve 22 has a greater radial extension at this point or at these points than in the adjacent, in particular axially adjacent, areas.

[0044] Such a holding section 29 can be provided in different areas of the clamping sleeve 22. According to Fig. 3 and Fig. 4a), the holding section 29 is preferably provided on the sleeve main body 27. The holding section 29 can be formed, as in Fig. 3, by a single, in particular partially or completely circumferential, cross-sectional widening 31 of the outer cross section of the sleeve main body 27, or, as in Fig. 4a), by several axially spaced-apart, in particular partially or completely circumferential, cross-sectional widenings 31 of the outer cross section of the sleeve main body 27, in particular a sawtooth profile 32. Such a cross-sectional widening 31 or such cross-sectional widenings 31 is or are provided here in order to exert the aforementioned maximum contact force on the protective tube 18 at the respective contact point between the cross-sectional widening 31 and the protective tube section 21.A sawtooth profile 32 has the additional effect that the cross-sectional extensions 31 can dig into the material of the protective hose section 21 and thus also create a positive connection.

[0045] In principle, as illustrated in Fig. 4b), the holding section 29 can also be formed by at least one spring element 33 extending radially spaced from the clamping sleeve 22, in particular from the sleeve main body 27. In this case, the at least one spring element 33 can each have at least one projection 34, in particular a hook-shaped projection, directed toward the sleeve main body 27 and / or, in the assembled state, toward the protective tube 18. Such a projection 34 is provided here in order to exert the aforementioned maximum contact force on the protective tube 18 at the respective contact point between the projection 34 and the protective tube section 21.

[0046] In this context, a spring element 33 is a part of the clamping sleeve 22 that can be elastically deflected relative to the clamping sleeve 22, in particular relative to the sleeve main body 27, and preferably extends substantially parallel to the clamping sleeve 22, in particular relative to the sleeve main body 27. Here, and preferably, several such spring elements 33 are arranged around the circumference, each of which has a hook-shaped projection 34.

[0047] In principle, the combination of at least one such spring element 33 as a holding section 29 with at least one above cross-sectional extension 31 as a further holding section 29 is also conceivable.

[0048] Furthermore, it is preferably provided here that the clamping sleeve 22, in particular the sleeve main body 27, has a cross-sectional constriction 35 of the outer cross section of the clamping sleeve 22 adjacent to the holding section 29, in particular in the assembled state adjacent to the housing interior, preferably between the holding section 29 and the sleeve collar 28. This is illustrated by way of example in Fig. 3.

[0049] In the area of ​​such a cross-sectional constriction 35 of the clamping sleeve 22, the cross-section of the hose wall 25 of the protective hose 18 abutting the clamping sleeve 22 is expanded compared to the area of ​​the at least one cross-sectional expansion; thus, the hose wall 25 is thicker here and / or the inner cross-section of the protective hose section 21 is narrower here. This further complicates the removal of the protective hose 18.

[0050] In the exemplary embodiments illustrated here and thus preferred, the clamping sleeve 22, in particular the sleeve main body 27, further comprises an insertion section 36 formed by an end-side tapering of the clamping sleeve 22, in particular the sleeve main body 27. Here and preferably, the insertion section 36 is arranged at the axial end of the clamping sleeve 22 arranged in the protective tube 18 in the assembled state and / or facing away from the sleeve collar 28.

[0051] Such an insertion section 36 facilitates insertion into the protective tube 18 due to the tapering of the clamping sleeve 22 at this end. The insertion section 36 is here and preferably adjacent to the holding section 29.

[0052] Furthermore, and preferably for the best possible clamping effect, it is provided that the clamping sleeve 22 extends in the axial direction at least over the largest part of the housing clamping section 24, preferably at least as far as the outer edge of the housing recess 23. Particularly preferably, the clamping sleeve 22 in this case even extends beyond the outer edge of the housing recess 23, as shown in Figures 3 and 4, protruding axially outward from the housing clamping section 24.

[0053] The clamping sleeve 22 can be axially secured in various ways. In principle, it can be provided that the clamping sleeve 22 is axially secured to the drive housing 13 exclusively by frictional engagement, in particular exclusively by frictional engagement between the clamping sleeve 22 and the protective hose section 21. It is also conceivable for the clamping sleeve 22 to be axially secured to the drive housing 13 by frictional engagement and / or positive engagement and / or by material engagement. Here, and preferably, the clamping sleeve 22 is axially secured to the drive housing 13 by frictional engagement, positive engagement, and material engagement.

[0054] Such a positive fit is achieved here in particular by axially abutting the sleeve collar 28 against the drive housing 13, preferably the inner housing shoulder 30. A material bond is achieved here in particular by welding, preferably ultrasonic welding, or gluing. The material bond has the additional advantage of further increasing the seal, which further complicates the penetration of moisture into the interior of the drive 2 or drive housing 13.

[0055] Furthermore, in the exemplary embodiments shown here and preferred in this respect, it is provided that the drive housing 13 has a housing cover 37 and that the housing recess 23 of the drive housing 13 is provided in the housing cover 37.

[0056] As Figures 3, 4a) and 4b) show, it is preferably also provided here that the housing clamping section 24, here for the frictional radial contact of the protective tube 18, has a first housing axial section 38 with a constant cross section, in particular diameter (Fig. 3 and 4a)), and / or, here for bending the spring elements 33 radially inwards, a second housing axial section 39 with a cross section, in particular diameter, decreasing towards the outside of the housing (Fig. 4b)).

[0057] Here and preferably, the protective hose 18 is designed at least in sections and / or the entire protective hose section 21 in the manner of a corrugated hose.

[0058] In the style of a "corrugated hose" means that the radially outer hose cross-section alternately increases and decreases, with the wall thickness remaining the same or alternating.

[0059] A protective hose section shaped in this way is particularly suitable for the clamping device in question. According to a further teaching, a cable grommet 1 for an electric motor drive 2, in particular a spindle drive, for adjusting a closure element 3 of a motor vehicle 4 is proposed, wherein the cable grommet 1 has a body-side cable grommet connection 16, a drive-side cable grommet connection 17, and a protective hose 18 extending from the body-side cable grommet connection 16 to the drive-side cable grommet connection 17 along a geometric center line M, wherein a guide channel 19 for guiding at least one electrical line 20 extends through the body-side cable grommet connection 16, the drive-side cable grommet connection 17, and the protective hose 18.

[0060] According to this further teaching, it is essential that the drive-side cable grommet connection 17 is designed in several parts with an axial protective hose section 21 and a clamping sleeve 22 secured axially to the drive housing 13. It is also essential that the protective hose section 21 can be inserted from the outside into a housing clamping section 24 formed by a housing recess 23 of the drive housing 13, and that the clamping sleeve 22 can be inserted from the inside into the housing clamping section 24, so that the protective hose section 21 and the clamping sleeve 22 axially overlap in the housing clamping section 24. Finally, it is also essential that the protective hose 18 has a hose wall 25 and that the hose wall 25 can be radially clamped in the region of the protective hose section 21 between the clamping sleeve 22 and the housing clamping section 24 or between two sections of the clamping sleeve 22.

[0061] This means that the clamping sleeve 22 has a shape which, when the protective hose section 21 from the outside and the clamping sleeve 22 from the inside are inserted into the housing clamping section 24 and axially overlap one another, the hose wall 25 is radially clamped in the region of the protective hose section 21 either between the clamping sleeve 22 and the housing clamping section 24 or between the two sections of the clamping sleeve 22. Here and preferably in the former case, in order to effect the clamping, the radial outer side of the clamping sleeve 22, in particular of the sleeve main body 27, has a cross-sectional widening 31, by means of which the clamping sleeve 22, in particular the sleeve main body 27, and the housing clamping section 24 are prestressed against one another as soon as the hose wall 25 of the protective hose section 21 is inserted between them.Thus, the shape of the clamping sleeve 22 creates a constriction between the clamping sleeve 22 and the housing clamping section 24, which clamps the hose wall 25. In the latter case, and preferably to achieve the clamping, the two sections of the clamping sleeve 22 are shaped such that they are prestressed against each other as soon as the hose wall 25 of the protective hose section 21 is inserted between them.

[0062] Reference may be made to all statements relating to the proposed drive 2.

Claims

Patent claims 1. Drive, in particular a spindle drive, for adjusting a closure element (3) of a motor vehicle (4), wherein the drive (2) has an electric drive motor (8), a drive housing (13) and a cable grommet (1), wherein the cable grommet (1) has a body-side cable grommet connection (16), a drive-side cable grommet connection (17) and a protective tube (18) extending from the body-side cable grommet connection (16) to the drive-side cable grommet connection (17) along a geometric center line (M), wherein a guide channel (19) for guiding at least one electrical line (20) extends through the body-side cable grommet connection (16), the drive-side cable grommet connection (17) and the protective tube (18), characterized in thatthat the drive-side cable grommet connection (17) is designed in several parts with an axial protective hose section (21) and a clamping sleeve (22) axially secured to the drive housing (13), that the protective hose section (21) is inserted from the outside into a housing clamping section (24) formed by a housing recess (23) of the drive housing (13), and the clamping sleeve (22) is inserted from the inside into the housing clamping section (24), so that the protective hose section (21) and the clamping sleeve (22) axially overlap in the housing clamping section (24), and that the protective hose (18) has a hose wall (25) and the hose wall (25) is radially clamped in the region of the protective hose section (21) between the clamping sleeve (22) and the housing clamping section (24) or between two sections of the clamping sleeve (22).

2. Drive according to claim 1, characterized in that the clamping sleeve (22) has a tubular, in particular substantially cylindrical, sleeve main body (27), preferably that the clamping sleeve (22) has a sleeve collar (28) extending radially outwards from the sleeve main body (27), in particular at the axial end.

3. Drive according to claim 1 or 2, characterized in that the clamping sleeve (22) has a holding section (29) which, in the assembled state, projects radially towards the protective hose (18) at least at one point.

4. Drive according to claim 3, characterized in that the holding section (29) is provided on the sleeve main body (27), preferably that the holding section (29) is formed by a single, in particular partially or completely circumferential, cross-sectional widening (31) of the outer cross section of the sleeve main body (27), or that the holding section (29) is formed by several axially spaced-apart, in particular partially or completely circumferential, cross-sectional widenings (31) of the outer cross section of the sleeve main body (27), in particular a sawtooth profile (32).

5. Drive according to claim 3 or 4, characterized in that the holding section (29) is formed by at least one spring element (33) extending radially spaced from the clamping sleeve (22) otherwise, in particular to the sleeve main body (27), preferably that the at least one spring element (33) has at least one projection (34), in particular a hook-shaped projection, directed towards the sleeve main body (27) and / or in the assembled state towards the protective hose (18).

6. Drive according to one of claims 3 to 5, characterized in that the clamping sleeve (22), in particular the sleeve main body (27), adjacent to the holding section (29), in particular in the assembled state adjacent to the housing interior, preferably between the holding section (29) and the sleeve collar (28), has a cross-sectional constriction (35) of the outer cross section of the clamping sleeve (22).

7. Drive according to one of the preceding claims, characterized in that the clamping sleeve (22), in particular the sleeve main body (27), has an insertion section (36) formed by an end-side taper of the clamping sleeve (22), in particular of the sleeve main body (27), preferably that the insertion section (36) is arranged on the axial end of the clamping sleeve (22) which, in the assembled state, is arranged in the protective tube (18) and / or facing away from the sleeve collar (28).

8. Drive according to one of the preceding claims, characterized in that the clamping sleeve (22) extends in the axial direction at least over the largest part of the housing clamping section (24), preferably at least up to the outer edge of the housing recess (23), more preferably beyond the outer edge of the housing recess (23).

9. Drive according to one of the preceding claims, characterized in that the clamping sleeve (22) is axially secured to the drive housing (13) exclusively by frictional engagement, in particular exclusively by means of frictional engagement between the clamping sleeve (22) and the protective hose section (21), or that the clamping sleeve (22) is axially secured to the drive housing (13) by frictional engagement and / or positive engagement and / or material engagement.

10. Drive according to one of the preceding claims, characterized in that the drive housing (13) has a housing cover (37) and that the housing recess (23) of the drive housing (13) is provided in the housing cover (37). 1 1. Drive according to one of the preceding claims, characterized in that the housing clamping section (24) has a first housing axial section (38) with a constant cross-section, in particular diameter, and / or a second housing axial section (39) with a cross-section, in particular diameter, decreasing towards the outside of the housing.

12. Drive according to one of the preceding claims, characterized in that the protective hose (18) is designed at least in sections and / or the entire protective hose section (21) in the manner of a corrugated hose.

13. Cable grommet for an electric motor drive (2), in particular a spindle drive, for adjusting a closure element (3) of a motor vehicle (4), wherein the cable grommet (1) has a body-side cable grommet connection (16), a drive-side cable grommet connection (17) and a cable grommet connection (17) extending from the body-side cable grommet connection (16) to the drive-side Cable grommet connection (17) along a geometric center line (M) extending protective hose (18), wherein a guide channel (19) for guiding at least one electrical line (20) extends through the body-side cable grommet connection (16), the drive-side cable grommet connection (17) and the protective hose (18), characterized in that the drive-side cable grommet connection (17) is designed in several parts with an axial protective hose section (21) and a clamping sleeve (22) axially secured to the drive housing (13), that the protective hose section (21) can be inserted from the outside into a housing clamping section (24) formed by a housing recess (23) of the drive housing (13) and the clamping sleeve (22) can be inserted from the inside into the housing clamping section (24), so that the protective hose section (21) and the clamping sleeve (22) are axially overlap,and that the protective hose (18) has a hose wall (25) and the hose wall (25) can be radially clamped in the region of the protective hose section (21) between the clamping sleeve (22) and the housing clamping section (24) or between two sections of the clamping sleeve (22).

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