Rope drive system for a shielding device for a vehicle interior

Abstract

A cord drive system for a sheltering device for a vehicle interior. 2.1 there is known a rope drive system of this type, comprising at least one rope drum which is mounted so as to be rotatable about an axis of rotation; the invention relates to a shielding device comprising a rope drum, at least one rope strip which is held on the rope drum in a winding and unwinding manner and which is designed to move a flexible planar component of the shielding device, and comprising a drive motor which is designed to rotate the rope drum and which has a motor shaft which is operatively connected to the rope drum. 2.2 according to the invention, the worm shaft is arranged in a rotationally fixed manner on the motor shaft and the worm wheel is arranged coaxially to the axis of rotation and is connected to the rope drum, the worm wheel and the worm shaft engaging with each other. 2.3 is used for shielding of vehicle window glass.

Description

Technical Field

[0001] The present invention relates to a rope drive system for a shielding device for a vehicle interior space, the rope drive system comprising: at least one rope drum rotatably supported about a rotation axis; at least one rope strip wound and unwound and held on the rope drum and configured to move a flexible planar component of the shielding device; and a drive motor configured to rotate the rope drum and having a motor shaft operatively connected to the rope drum. Background Technology

[0002] Such a rope-driven system is known from DE102019205372A1 and is used as a shielding device in the side window area of ​​a motor vehicle. In the known rope-driven system, a drive motor acts on a single rope drum, which is arranged on the output side of the drive motor and operatively connected to it. Summary of the Invention

[0003] The objective of this invention is to provide a rope drive system of the type mentioned at the beginning, which offers advantages over the prior art. In particular, it aims to achieve a compact structural form while maintaining a simple construction.

[0004] This task is solved by arranging the worm shaft anti-rotationally on the motor shaft, and arranging the worm wheel coaxially with the axis of rotation and connecting it to the rope drum, wherein the worm wheel and the worm shaft mesh with each other. The worm shaft associated with the drive motor and the worm wheel associated with the rope drum constitute a worm gear transmission mechanism. The solution according to the invention achieves a compact and simple construction of the rope drive system. This is particularly advantageous compared to known solutions in the prior art, where the motor shaft is indirectly connected to the rope drum via multiple intermediate gears. Furthermore, the worm gear transmission mechanism enables particularly low-noise operation of the rope drive system. Other advantages are achieved through a relatively large transmission ratio from the drive motor's speed to lower speeds, resulting from the structural type. The worm wheel is preferably directly connected to the rope drum. The worm shaft is preferably directly connected to and / or constitutes the motor shaft. The axis of rotation of the rope drum, and therefore the axis of rotation of the worm wheel, is preferably orthogonal to the longitudinal axis of the motor shaft, and therefore the longitudinal axis of the worm shaft.

[0005] In one design of the present invention, the worm gear is connected to the rope drum with limited movability relative to the rope drum along the axis of rotation. This design is based on the consideration that, during the winding and unwinding of the rope, an axial force component acting along the axis of rotation may act on the rope drum. Simultaneously, another axial force component arises due to the meshing between the worm shaft and the worm gear. These force components can be balanced through the limited relative movability between the rope drum and the worm gear. This balance aims to resist, on the one hand, the negative impact of the axial force of the worm gear on the function of the rope drum, and on the other hand, the negative impact of the axial force of the rope drum on the function of the worm gear.

[0006] In another embodiment of the invention, the worm gear is elastically connected to the rope drum relative to the rope drum about a rotational axis. This rotationally elastic connection between the worm gear and the rope drum resists the transmission of torque peaks from the rope drum to the worm gear, and vice versa. Such torque peaks can occur during the winding and unwinding of the rope and may negatively impact the function of the worm gear drive mechanism, consisting of the worm gear and worm shaft, and lead to premature wear. The rotationally elastic connection between the worm gear and the rope drum, in turn, resists the transmission of torque peaks from the worm gear drive mechanism to the rope drum. Such torque peaks can cause undesirable sudden movements of the rope drum, and consequently the rope, and ultimately the flexible planar components, thus accelerating wear and damage. The rotationally elastic connection resists these disadvantages.

[0007] In another design of the invention, at least two rope drums are provided, each having a rope strip and a worm wheel, wherein the worm wheels mesh with a worm shaft. In this design, the rope drive system thus has multiple rope drums, each with a worm wheel that meshes with a worm shaft. Therefore, the drive motor can drive multiple rope drums simultaneously. Furthermore, a particularly compact structure can be achieved through the direct meshing between the worm shaft and the multiple worm wheels. In this design, a first rope drum having a first rope strip and a first worm wheel, and a second rope drum having a second rope strip and a second worm wheel may also be mentioned. The first rope drum is rotatably supported about a first axis of rotation. The second rope drum is rotatably supported about a second axis of rotation. In one design, the first and second axes of rotation extend in a common plane orthogonal to the longitudinal axis of the worm shaft. Preferably, the first and second axes of rotation are parallel to each other. In another design, the rope drive system has more than two rope drums, each with a rope strip and a worm gear, such as three, four or more rope drums, wherein the worm gears mesh with worm shafts.

[0008] In another design of the invention, two rope drums are arranged on radially opposite sides of the worm shaft. This radially opposite arrangement of the rope drums, and therefore the worm gears, allows for a particularly compact structural form. Furthermore, the radially opposite worm gears facilitate the balance of meshing forces. In one design, the rope drums are arranged in a vertical plane, with the first rope drum positioned above the worm shaft and the second rope drum positioned below it. In another design, the rope drums are arranged in a horizontal plane, with the first rope drum positioned to the left of the worm shaft and the second rope drum positioned to the right of the worm shaft.

[0009] In another design of the invention, the two rope drums have parallel-extending axes of rotation. This parallel orientation of the axes of rotation provides additional advantages in terms of the compactness and simplicity of the rope drive system.

[0010] In another design of the invention, the drive motor has a motor housing and a reduction stage integrated into the motor housing. Through the reduction stage, the output speed of the drive motor, applied to the motor shaft and thus also to the worm shaft, is reduced to a lower speed. This reduction stage, placed before the worm gear drive, offers advantages in the design of the worm gear drive mechanism. Specifically, the worm wheel can be implemented with a smaller diameter than if it did not have a pre-reduction stage. By integrating into the motor housing, the reduction stage is protected from external influences, particularly from dust, dirt, and / or moisture.

[0011] In another embodiment of the invention, the at least one rope has a zurtrum and a leertrum, each tensioned by a tension roller, wherein the tension rollers are supported, with limited linear movement, at the drive housing of the rope drive system and elastically supported against each other by means of spring elements. The tension rollers are used to compensate for gaps within the zurtrum and leertrum in a manner known to those skilled in the art. The zurtrum is wound and bears tension. The leertrum is unwound and does not bear tension. The relationship between the zurtrum and leertrum and the respective sections of the rope depends on the corresponding rotation direction of the rope drum. The particularly simple construction of the rope drive system is achieved by the limited linear movement of the tension rollers at the drive housing. Furthermore, its assembly is simplified. The tension rollers are elastically connected and supported against each other by means of spring elements. The preload transmitted to the tension rollers by means of the spring elements acts along the respective linear axis of motion of the tension rollers. The spring element can have any design suitable for the present purpose, and is preferably implemented as a helical torsion spring, coil spring, leaf spring or similar form.

[0012] In another design of the invention, the rotation axes of the tension rollers are oriented transversely to each other. Preferably, the rotation axes of the tension rollers are orthogonally oriented to each other. In other words, in this design, the tension rollers are not arranged, for example, in a common plane, but instead are arranged at a corner. This corner arrangement allows for a more compact construction of the rope drive system.

[0013] In another embodiment of the invention, the tension roller is integrated into the drive housing. By integrating it into the drive housing, the tension roller is protected from external influences, particularly from dust, dirt, and / or moisture. Furthermore, integration into the drive housing helps to isolate the operating noise of the tension roller. This improves noise comfort within the vehicle interior.

[0014] The present invention also relates to a shielding device for the interior space of a motor vehicle, the shielding device having a rope drive system as described above. In one design, the shielding device is provided for a side window of the motor vehicle. In other designs, the shielding device is provided for shielding a rear window and / or a glass roof of the motor vehicle. Preferably, the shielding device is a roller blind, wherein the flexible planar component is a roller blind web that is rollable and deployable and held on a winding shaft. In one design, the at least one rope is operatively connected to the winding shaft. In another design, the at least one rope is operatively connected to a pull-out profile fixed at one end of the roller blind web. In yet another design, the rope acts on a follower fixed at a longitudinal side of the flexible planar component. Attached Figure Description

[0015] Other advantages and features of the invention will become apparent from the claims and from the following description of preferred embodiments of the invention, illustrated in the accompanying drawings. The drawings show:

[0016] Figure 1 An embodiment of a shielding device according to the invention for a side window glass of a motor vehicle is shown in a schematic perspective view.

[0017] Figure 2 A magnified perspective view shows the method used according to Figure 1 The shielding device is provided according to one embodiment of the rope drive system of the present invention, wherein the various components of the rope drive system are hidden in the drawing.

[0018] Figure 3 With Figure 3 The corresponding view shows the rope drive system with one half of the drive housing inserted in the drawing. Detailed Implementation

[0019] according to Figure 1The shielding device 1 is arranged in the interior space R of the passenger car and is provided for shielding the rear side window glass S.

[0020] To block the side window glass S, the blocking device 1 has a flexible planar component 101, which can also be referred to as a flexible blocking component. Figure 1 In this configuration, the side window S is substantially covered in the direction of the vehicle interior space R by a flexible planar component 101. The flexible planar component 101 is wound and unfoldable at its rear end at a winding shaft supported in a housing 102. The housing 102 with the winding shaft is arranged approximately at the height of the window sill guardrail of the side window S, extends longitudinally in the vehicle's longitudinal direction, and is concealed behind the door trim in the fully assembled state. The covering device 1 further includes a pull-out profile 103 positioned at the front end of the flexible planar component 101 opposite to the winding shaft. The pull-out profile 103 is movable along a side guide 104 between a covered position and a released position. In the covered position, the pull-out profile 103 is positioned at the upper end of the side guide 104 relative to the vehicle height direction, and the flexible planar component 101 is planar tensioned and covers the side window S in the direction of the vehicle interior space R. In the release position, the pull-out profile 103 is displaced approximately along the side guide 104 to the height of the box housing 102. In the release position, the flexible planar component 101 is wound around the winding shaft, and the side window glass S is released. Figure 1 The occlusion location is shown in the diagram. The release location is not visible in the diagram.

[0021] To displace the flexible planar component 101 between a blocked position and a released position, the blocking device 100 includes a rope drive system 1. To displace the flexible planar component 101, the rope drive system 1 can act at the pull-out profile 103 and / or at the winding shaft and / or at the follower movably held in the side guide 104. For the purposes of this invention, the manner in which the rope drive system 1 acts and connects to the flexible planar component 101 is not important.

[0022] Rope drive system 1 in Figure 2 and Figure 3 The diagram shows in detail and includes at least one rope drum 2, at least one rope bar 4, and a drive motor 5.

[0023] The rope drum 2 is rotatably supported around the rotation axis 3.

[0024] The rope strip 4 is wound and unfolded on the rope drum 2 in a manner known to those skilled in the art and is operatively connected to the flexible planar component 101 in a manner not shown in detail in the figures, particularly to the winding shaft and / or pull-out profile 103 supported in the box housing 102 and / or the follower.

[0025] The drive motor 5 is configured to rotate the rope drum 2 about the rotation axis 3 and has a motor shaft 51 operatively connected to the rope drum 2. The motor shaft 51 extends longitudinally along the longitudinal axis L.

[0026] The rope drive system 1 also has a worm shaft 6 and a worm wheel 7.

[0027] The worm shaft 6 is mounted anti-rotationally on the motor shaft 51. This anti-rotation arrangement can be achieved via a suitable engagement connection. In one design, the motor shaft and worm shaft are integrally constructed. The worm wheel 7 is coaxially arranged with the rotation axis 3 and connected to the rope drum 2. The worm wheel 7 and the worm shaft 6 mesh with each other. The worm shaft 6 and the worm wheel 7 constitute a worm gear drive mechanism that converts the rotation and torque of the motor shaft 51 into the rotation and torque of the rope drum 2, and thus into the winding and / or unwinding motion of the rope 4. The winding and / or unwinding motion of the rope 4 causes displacement of the flexible planar component 101 between a blocked position and a released position.

[0028] In the illustrated embodiment, the rope drive system 1 has two rope drums 2 and 8, two rope strips 4 and 9, and two worm gears 7 and 10. These may also be referred to as: first rope drum 2, first rope strip 4, first worm gear 7, second rope drum 8, second rope strip 9, and second worm gear 10. The first rope drum 2 is rotatably supported about the rotation axis 3, which is also referred to below as the first rotation axis 3. The second rope drum 8 is rotatably supported about the second rotation axis 11. The second rope strip 9 is wound and unwound and held on the second rope drum 8.

[0029] In one design, the second rope 9 is also functionally connected to the flexible planar component 101. In another design, the second rope 9 is functionally connected to another flexible planar component, which is part of the blocking device 100 or another blocking device, wherein the other blocking device... Figure 1 It is not shown in detail in the text.

[0030] The second worm gear 10 is arranged coaxially with the second rotation axis 11 and connected to the second rope drum 8. The second worm gear 10 meshes with the worm shaft 6.

[0031] In the illustrated embodiment, the drive motor 5 thus drives multiple rope drums, namely the first rope drum 2 and the second rope drum 8. In an embodiment not shown in the figures, additional rope drums are also present, each equipped with a worm gear and driveable via the drive motor. For this purpose, the motor shaft and worm shaft can be configured to extend along a longitudinal axis to drive even further rope drums. These further rope drums, along with the further worm gears, can be positioned relative to... Figure 2 The drawing plane is arranged along the longitudinal axis. Figure 2 The left side of the two rope reels shown.

[0032] In the illustrated embodiment, the first rotation axis 3 and the second rotation axis 11 are parallel. The longitudinal axis L of the motor shaft 51, and therefore also the longitudinal axis of the worm shaft 6, is orthogonal to the two rotation axes 3 and 11.

[0033] Currently, the two rope drums 2 and 8, and therefore the two worm gears 7 and 10, are arranged in a common plane. Here, the worm shaft 6 is joined in the middle between the two worm gears 7 and 10. The worm gears 7 and 10 are arranged on the radially opposite sides of the worm shaft 6. Figure 2 The drawing plane shows the first worm gear 7 and therefore the first rope drum 2 arranged on the upper side of the worm shaft 6. The second worm gear 10 with the second rope drum 8 is arranged on the lower side of the worm shaft 6.

[0034] To avoid load peaks and the resulting wear and damage, the worm gears 7 and 10 are currently movably and / or elastically connected to the associated rope drums 2 and 8.

[0035] The first worm gear 7 and the first rope drum 2 are rotatably and elastically connected to each other about the first rotation axis 3. For this purpose, an elastic element can be arranged between the first rope drum 2 and the first worm gear 7.

[0036] Furthermore, the first rope drum 2 and the first worm gear 7 are connected to each other in a restricted relative-moving manner along the first rotation axis 3. For this purpose, the first rope drum 2 and the first worm gear 7 can be arranged on a common axis and supported at the axis in a restricted axial-moving manner relative to the axis.

[0037] The description of the movable and / or elastic connection between the first rope drum 2 and the first worm gear 7, with appropriate modifications, also applies to the second rope drum 8 and the second worm gear 10.

[0038] In the illustrated embodiment, the drive motor 5 has a motor housing 52. A reduction stage 53, not visible in the figure, is integrated into the motor housing 52. Due to this integration, the reduction stage is protected from external influences. The reduction stage 53 is used to convert the rotational speed to a lower speed and reduce the rotational speed applied to the motor shaft 51. The reduction stage 53 can be designed in any manner suitable for this purpose, such as a gear drive mechanism, particularly a planetary gear drive mechanism, a threaded drive mechanism, or a similar transmission mechanism.

[0039] The first rope 4 has a tension section 41 and a slack section 42. The tension section 41 is wound around the first rope drum 2 and is in a tensioned state. The slack section 42 is unwound from the first rope drum 2 and is not in a tensioned state. It is easy to understand that once the rotation direction of the first rope drum 2 changes, Figure 2 and Figure 3 The exemplary relationship between the tension and relaxation segments shown in the diagram is thus transformed.

[0040] To pretension the tension section 41 and the relaxation section 42, tension rollers 12 and 13 are present; these tension rollers may also be referred to as the first tension roller 12 and the second tension roller 13. The first tension roller 12 is used to pretension the tension section 41. The second tension roller 13 is used to pretension the relaxation section 42. The first tension roller 12 is rotatably supported about a first axis of rotation 14. The second tension roller 13 is rotatably supported about a second axis of rotation 15. The two tension rollers 12 and 13 are respectively supported at the drive housing G with restricted linear movement, wherein... Figure 3 Only one half of the drive housing G, G1, is shown. Furthermore, the two tension rollers 12, 13 are elastically supported on each other by means of a spring element 16. Currently, the spring element 16 is a helical torsion spring.

[0041] Unlike solutions known in the prior art, the rotation axes 14 and 15 of the two tension rollers 12 and 13 are not parallel, but instead oriented laterally. Currently, the first rotation axis 14 and the second rotation axis 15 are orthogonal. This allows for a particularly compact construction. Both tension rollers 12 and 13 are integrated into the drive housing G. This integration is achieved by assembling the second housing half at the first housing half G1. With the second housing half assembled, the rope drums 2 and 8, worm gears 7 and 10, and worm shaft 6 are also integrated into the housing G and are thus protected from external influences.

[0042] The second rope 9 also has a tension section 91 and a slack section 92. To pretension the tension section 91 and slack section 92 of the second rope 9, a third tension roller 17 and a fourth tension roller 18 are present. The third tension roller 17 can rotate about a third rotation axis 19, and the fourth tension roller 18 can rotate about a fourth rotation axis 20. The two rotation axes 19 and 20 are parallel to each other. The third tension roller 17 and the fourth tension roller 18 are supported at the drive housing G with limited linear movement and elastically supported at each other by means of an additional spring element 21. The additional spring element 21 is a helical spring.

Claims

1. A cable drive system (1) for a shielding device (100) for a vehicle interior space (R), the cable drive system comprising: At least one rope drum (2) is rotatably supported about a rotation axis (3). At least one rope strip (4), which is wound and unwound and held on the rope spool (2) and configured to move the flexible planar component (101) of the shielding device (100), and A drive motor (5), the drive motor being configured to rotate the rope drum (2) and having a motor shaft (51) operatively connected to the rope drum (2), Its features are, The worm shaft (6) is arranged anti-rotationally on the motor shaft (51), and the worm wheel (7) is arranged coaxially with the rotation axis (3) and connected to the rope drum (2), wherein the worm wheel (7) and the worm shaft (6) mesh with each other.

2. The rope drive system (1) according to claim 1, wherein, The worm gear (7) is connected to the rope drum (2) in a restricted manner along the axis of rotation (3) relative to the rope drum (2).

3. The rope drive system (1) according to claim 1 or 2, wherein, The worm gear (7) is elastically connected to the rope drum (2) about the rotation axis (3) relative to the rope drum (2).

4. The rope drive system (1) according to any one of the preceding claims, wherein, There are at least two rope drums (2, 8), each having a rope strip (4, 9) and a worm gear (7, 10), wherein the worm gear (7, 10) meshes with the worm shaft (6).

5. The rope drive system (1) according to claim 4, wherein, Two rope drums (2, 8) are arranged on the radially opposite sides of the worm shaft (6).

6. The rope drive system (1) according to claim 4 or 5, wherein, The two rope reels (2, 8) have parallel-extending axes of rotation (3, 11).

7. The rope drive system (1) according to any one of the preceding claims, wherein, The drive motor (5) has a motor housing (52) and a reduction stage (53) integrated into the motor housing (52).

8. The rope drive system (1) according to any one of the preceding claims, wherein, The at least one rope (4) has a pulling section (41) and a slack section (42), which are tensioned by means of tensioning rollers (12, 13), and wherein the tensioning rollers (12, 13) are respectively supported at the drive housing (G) of the rope drive system (1) with limited linear movement, and are elastically supported at each other by means of spring elements (16).

9. The rope drive system (1) according to claim 8, wherein, The rotation axes (14, 15) of the tension rollers (12, 13) are oriented transversely to each other, and in particular orthogonally to each other.

10. The rope drive system (1) according to claim 8 or 9, wherein, The tensioning rollers (12, 13) are integrated into the drive housing (G).

11. A shielding device (100) for the interior space (R) of a motor vehicle, the shielding device having a rope drive system (1) according to any one of the preceding claims.

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