Opening device

Abstract

The invention relates to an opening device for a motor vehicle door, in particular a handle-free motor vehicle door, for example a handle-free motor vehicle side door. For this purpose, the opening device is equipped with an electric drive (1 to 4) and an associated adjusting element (5) for loading the door leaf. The adjusting element (5) acts on the door leaf along its adjustment stroke (S) with a stroke-dependent force. The electric drive (1 to 4) acts on the adjusting element (5) with a rod mechanism (7, 8) connected therebetween, the rod mechanism (7, 8) acting on the adjusting element (5) at least by means of the short rod (7) and the long rod (8).

Description

Technical Field

[0001] The invention relates to an opening device for a motor vehicle door, in particular a handleless motor vehicle door, such as a handleless motor vehicle side door, the opening device comprising an electric drive and an associated adjusting element for applying pressure to a door leaf, wherein the adjusting element applies pressure to the door leaf along its adjustment travel with a travel-dependent force. That is, the electric drive acts on the associated adjusting element and applies pressure to the door leaf by means of the adjusting element. Background Art

[0002] Opening devices for motor vehicle doors are known in many designs and are used in the prior art and in practice. In practice, the relevant opening device ensures, in accordance with the description in DE 10 2015 103826 A1, that the associated door leaf of the relevant motor vehicle door can be opened at least in a gap relative to the motor vehicle body by means of the opening device. Thus, the operator or user of the motor vehicle can then grasp the door leaf through the gap created in this way and thereby swing the door leaf upwards about its swing axis in the example case and open it.

[0003] Of course, in principle, not only the swingable motor vehicle side doors can be equipped with such an opening device, but also, alternatively, tailgates, sliding doors, etc. can also be opened in this way. Alternatively, the front hood can also be equipped with such an opening device.

[0004] In either case, in a motor vehicle door equipped with the associated opening device, an outer door handle or an outer door grip is generally dispensable and the motor vehicle door can be designed particularly advantageously in terms of aerodynamics.

[0005] For this purpose, various embodiments of such opening devices are known in the prior art. For example, FR 2814 771 A1 shows an opening device that acts on a rod-shaped adjusting element in a screw-driven manner so that the adjusting element can open and, if necessary, lock the door leaf in a desired manner.

[0006] In another embodiment corresponding to DE 10 2018 132 665 A1, the door leaf can be held by means of an adjusting element or adjusting means. For this purpose, the adjusting element has a locking means or a locking rod. This can provide a positive connection with the motor vehicle body.

[0007] In the prior art of this type according to DE 10 2011 015 669 A1, a push element is provided, which is driven by a motor to transfer the motor vehicle door or the associated door leaf by a swinging movement to the ejection position. For this purpose, the push element is equipped with an outer rod and an inner rod in two parts, which can be swung relative to each other. Since the outer rod is equipped with an arc-shaped stop ring, for example, and is moved against the door leaf by means of it in order to open the door leaf, a stroke-dependent force is achieved along the adjustment stroke of the adjustment element, by means of which the adjustment element is loaded with the door leaf.

[0008] The prior art has been proven in principle, but there is still room for improvement. In practice, the structure of this type of teaching according to DE 10 2011 015 669 A1 is relatively complex, and the frictional contact of the stop ring of the outer rod on the inside of the hatch or motor vehicle door leads here on the one hand to damage on the inside of the motor vehicle door and on the other hand to increased wear on the stop ring. In addition, the interaction between the curved stop ring on the one hand and the door leaf loaded by it on the other hand takes up a relatively large space for mutual interaction. This is disadvantageous against the background that the installation space between the associated motor vehicle door and the motor vehicle body is usually limited, because the interior of the motor vehicle door that usually accommodates the electric drive is typically filled with other devices, such as side impact protection, window lifts, loudspeakers, side airbags, etc. Summary of the invention

[0009] In contrast, the object of the present invention is to further develop such an opening device for a motor vehicle door in such a way that a functionally appropriate and structurally simple application of force to the adjusting element is possible.

[0010] To solve this problem, an opening device for a motor vehicle door of this type is characterized within the scope of the invention in that the electric drive acts on the adjusting element with an interposed rod mechanism, wherein the rod mechanism acts on the adjusting element at least with a short rod and a long rod.

[0011] In most cases, the following design is adopted, namely, the short rod acts on the end pin of the adjusting element. In contrast, the long rod as a component of the rod mechanism interacts with the cantilever of the adjusting element in most cases. Of course, in addition to the short rod and the long rod, a third rod or even a fourth rod can also be provided within the scope of the invention in addition, so that the adjusting element can be acted on by all rods to open the door leaf of the motor vehicle door. In this case, the different rods ensure that the adjusting element acts on the door leaf along its adjustment path with a force that is related to the path, as will be explained in more detail below.

[0012] In fact, in most cases, the following design is adopted, that is, the two rods load the adjusting element in sequence, that is to say, load the adjusting element one by one. In most cases, the following measures are taken, that is, starting from the final position of the adjusting element, the adjusting element is first loaded with a short rod and then with a long rod. In this way, the adjusting element is usually loaded with a large force via a short portion of the adjustment stroke by means of the short rod. Starting from the final position of the adjusting element, the present invention can thus ensure that the opening device can also open a motor vehicle door or its door leaf that is frozen relative to the motor vehicle body, for example. For this purpose, in most cases, an increased force is required, which is provided by the short rod according to the present invention. The short rod acts on the adjusting element on a smaller part of the adjustment stroke of the adjusting element starting from the final position of the adjusting element. For example, a component of 10% to a maximum of 30% of the adjustment stroke of the adjusting element can be completed by means of the short rod.

[0013] If, on the other hand, the door leaf is released in the example described or has been released from the surrounding rubber seal in the motor vehicle body, then a smaller force is sufficient to load the adjusting element over the remaining part of its adjustment travel. In the example described, this corresponds to a remaining adjustment travel of 70% to 90% of the entire adjustment travel. That is, starting from the final position of the adjusting element retracted relative to the housing, the adjusting element is usually first loaded with a high transmission ratio and therefore a large force, taking into account a small part of the adjustment travel, i.e., by means of a short rod. The majority of the adjustment travel of the adjusting element is then completed by the long rod loading the adjusting element with a relatively small transmission ratio and therefore a small force.

[0014] Thus, along the first part of the adjustment stroke, the door leaf is loaded with a greater force and a lower speed by means of the short rod, whereas the long rod then carries out the majority of the remaining adjustment stroke of the adjustment element with less force and thereby also increases the speed of the adjustment element and thus the door leaf loaded by it as a whole. Thus, a high transmission ratio is described, which is achieved in the first part of the adjustment stroke starting from the end position, and a relatively small transmission ratio is then described when the adjustment element is loaded with the long rod.

[0015] The final position of the adjusting element in this respect typically corresponds to a position in which the housing of the receiving device is retracted relative to the door panel of the door leaf or the housing of the receiving device. In contrast, the fully extended position of the adjusting element is its exposed position relative to the door panel of the door leaf and the maximum distance of the door leaf relative to the motor vehicle body that can be achieved by means of the opening device.

[0016] According to another advantageous embodiment, the two rods are coaxially coupled to the drive wheel of the electric drive. In most cases, the two rods have an angular spacing of about 20° to 40° relative to each other and relative to the common axis. The drive wheel usually belongs to a transmission, in particular a reduction transmission. The reduction transmission is loaded by the motor of the electric drive. The output-side drive wheel of the relevant transmission is equipped with two rods.

[0017] Furthermore, in most cases, the following design is adopted, that is, the adjusting element is designed as an adjusting slide that can move linearly. For this purpose, the adjusting slide usually has at least two stop shaped parts, which are used to interact with the associated stop edges of the relevant rod. In other words, the adjusting slide has a first stop shaped part, which is used to interact with the stop edge on the short rod; and a second stop shaped part, which is configured and designed to interact with the stop edge on the long rod.

[0018] Here, the two stop shaped parts are spaced apart from each other in the longitudinal direction relative to the longitudinally extending and linearly movable adjusting slide, so that the short rod can first act on the first stop shaped part of the adjusting slide and the long rod can then act on the second stop shaped part of the adjusting slide. The first stop shaped part is an end pin, while the second stop shaped part is designed as a cantilever.

[0019] The adjusting slide or adjusting element is usually made of plastic like the transmission wheel with two rods. This can also be applied to the transmission mechanism downstream of the motor, in particular the transmission wheel of the reduction transmission mechanism. Of course, other embodiments can also be considered. In addition, the adjusting slide that can move linearly is usually equipped with a linear guide.

[0020] Here, the linear guide is usually located inside a housing that surrounds the opening device as a whole. That is, the housing usually accommodates the electric drive including the transmission mechanism and the rod mechanism in its interior and is only provided with a front opening, through which the adjusting element designed as an adjusting slide moves outward or moves back into its end position. Here, the entire opening device including the housing can be installed inside the associated motor vehicle door and equipped with the opening device. Due to the surrounding and sealed design of the housing, the opening device as a whole can be installed inside the wet chamber of the motor vehicle door without having to worry about functional impairment over a long period of time.

[0021] Nevertheless, in association with the compact and functionally compliant structure realized in this way, a force loading adapted to the specific requirements is provided. In fact, the adjusting element first acts on the door leaf with an increased force from its retracted final position, so as to loosen or release the door leaf relative to the vehicle body, for example, in an icy state of the motor vehicle door. As long as the door leaf is released, the door leaf is loaded by the adjusting element at an increased speed and a reduced force on the remaining part of the adjustment stroke. That is to say, in the adjustment stroke of the adjusting element, the force line is first transformed from the short rod to the adjusting element and then from the long rod to the adjusting element by the electric drive or the transmission wheel on the output side, wherein the two rods load the adjusting element alternately and sequentially, i.e. one after another. Here, the two sections of the adjustment stroke are directly transitioned or connected to each other by means of the components completed by the short rod and the long rod, so that the adjusting element as a whole moves smoothly from its final position on the output side at first with a lower speed and a larger force, and then with a smaller force and a higher speed. This is the main advantage of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The invention is described in detail below with reference to the accompanying drawings which show only one embodiment; in the drawings:

[0023] Figure 1 The opening device according to the invention is shown in different functional positions,

[0024] Figure 2 The basic design of the rod mechanism is shown.

[0025] Figure 3 A. Figure 3 B and Figure 3 C shows the loading of the adjusting element during its adjustment travel in a first variant,

[0026] Figure 4 A. Figure 4 B and Figure 4 C shows a modified second embodiment. DETAILED DESCRIPTION

[0027] exist Figure 1 In the figure, an opening device for a motor vehicle door not explicitly shown is shown and presented. Figure 1 The opening device schematically shown in FIG. 1 is usually accommodated inside a motor vehicle door and ensures, for example, by mounting it at the end relative to the motor vehicle body in the region of the pivot axis of the associated door leaf, that the door leaf is opened to a certain extent relative to the motor vehicle body, as can be done, for example, according to DE 10 2015 103 826 A1. Figure 1 The operator can therefore grasp the door leaf through the gap and swing it fully upwards.

[0028] For this purpose, the opening device is equipped with Figure 2 The electric drive devices 1, 2, 3, 4 can be seen in the view in FIG. In addition, an adjusting element 5 is provided, which is used to load a door leaf not shown in detail. Here, the adjusting element 5 loads the door leaf along its adjustment stroke S with a stroke-dependent force.

[0029] In fact, according to Figure 1 The adjustment stroke S can be seen in the two views in Figure 1. Figure 1 The upper part of the drawing shows the adjusting element 5 in the retracted end position, while Figure 1 The lower part of the is present in another end position, namely in an exposed position relative to the housing 6 surrounding the entire opening device. In fact, the housing 6 is designed as a whole to be closed and accommodates the electric drive 1 to 4 and the rod mechanism 7, 8 described in detail below. Here, the surrounding housing 6 is designed to be closed except for the opening 6a on the front side, through which the adjusting element 5 can be moved out and in relative to the housing 6.

[0030] According to the invention, the electric drive devices 1 to 4 now act on the adjusting element 5 with the already mentioned lever mechanisms 7, 8 connected in between, which can be done according to Figure 2 For this purpose, the rod mechanism 7, 8 acts on the adjustment element 5 at least with a short rod 7 and a long rod 8. According to this embodiment, it can be seen that the length of the short rod 7 is slightly greater than half the length of the long rod 8, which is of course only exemplary.

[0031] In practice, the following design is adopted, namely, the short rod 7 acts on the end pin 5a of the adjustment element 5, while the long rod 8 interacts with the cantilever 5b of the adjustment element 5. In general, the following design is adopted here, namely, the two rods 7 and 8 act on the adjustment element 5 in sequence. In practice, according to this embodiment, the following measures are taken, namely, from the adjustment element 5 in its retracted state relative to the housing 6, in Figure 1 Starting from the first end position shown at the top of , the short rod 7 first acts on the adjusting element 5 , and the adjusting element 5 is then acted upon by means of the long rod 8 .

[0032] For this purpose, the two rods 7 , 8 are coaxially coupled to a drive wheel 4 as a component of the electric drive 1 to 4 .

[0033] In fact, the electric drive devices 1 to 4 include a motor 1 and a transmission mechanism 2, 3, 4 loaded by the motor 1. The transmission mechanism 2, 3, 4 ensures that the fast-running rotational motion of the driven shaft of the motor 1 is decelerated as a whole, that is, it is finally converted into a slow rotational motion of the output-side drive wheel 4.

[0034] As described, the two rods 7, 8 are coaxially coupled to the output-side transmission wheel 4 of the transmission mechanism 2, 3, 4 of the electric drive 1 to 4. Here, according to this embodiment, the two rods 7, 8 have an angular distance α of about 20° to 40° relative to each other. Of course, this is related to the topological conditions and the design and is by no means mandatory or to be understood as restrictive in any way.

[0035] In this embodiment, the adjusting element 5 is a linearly movable adjusting slide 5. For this purpose, the housing 6 is provided on the inside with a linear guide 9, by means of which the adjusting element 5 or the linearly movable adjusting slide 5 is guided inside the housing 6.

[0036] Now usually two stop moldings 5a or 5b ensure that the load-adjusting slide 5 is loaded, which can be determined according to the Figure 3 A to Figure 3 C or Figure 4 A to Figure 4 C. Here, the two stop shaped parts 5a and 5b are spaced apart from each other along the longitudinal extension of the adjusting slide 5. In addition, the following design is adopted, that is, the stop shaped part 5a interacts with the short rod 7, while the other stop shaped part 5b is provided and designed to interact with the long rod 8. For this purpose, the relevant rod 7, 8 has an associated stop edge 7a or 8a. The stop shaped part 5a is an end pin 5a on the adjusting element 5. In contrast, the stop shaped part 5b is a cantilever 5b.

[0037] Now you can use Figure 3 A to Figure 3 C or Figure 4 A to Figure 4 The order of functions in C shows how it works. Here, Figure 3 A or Figure 4 A shows the corresponding position of the adjusting element 5 Figure 1 The upper view in the retracted state, while Figure 3 C or Figure 4 C shows the adjustment element 5 after completing the adjustment stroke S. Figure 1 The lower view in the fully moved out position.

[0038] From corresponding to Figure 3 A or Figure 4 Starting from the final position of A, the short rod 7 first contacts the adjusting slide 5. Then Figure 3 A or Figure 4 In this functional position of A, the short rod 7 and the subsequent change process can be Figure 3 A or Figure 4 The functional position of A corresponds to Figure 3 B or Figure 4The transition of the functional positions can be seen in the view in B. The transmission ratio change is now achieved in that the short rod 7 is disengaged from the end pin or the stop profile 5a, so that the long rod 8 then contacts the cantilever 5b or the stop profile 5b with its stop edge 8a.

[0039] Now according to Figure 3 B or Figure 4 B's functional position to Figure 3 C or Figure 4 During the transition from the functional position C, the adjusting element 5 is loaded with a relatively small force and a relatively high speed until it reaches its other end position, which thus corresponds to Figure 1 Here, the adjustment slide 5 completes the remaining part of the adjustment stroke S.

Claims

1. An opening device for a motor vehicle door, in particular a handleless motor vehicle door, for example a handleless motor vehicle side door, comprising an electric drive (1 to 4) and an associated adjusting element (5) for loading the door leaf, wherein: The adjusting element (5) loads the door leaf along its adjustment travel (S) with a travel-dependent force. It is characterized in that The electric drive devices (1 to 4) act on the adjusting element (5) with a rod mechanism (7, 8) connected in between, wherein the rod mechanism (7, 8) acts on the adjusting element (5) at least with a short rod (7) and a long rod (8).

2. The opening device according to claim 1, characterized in that: The short rod (7) loads the end pin (5a) of the adjustment element (5).

3. The opening device according to claim 1 or 2, characterized in that: The long rod (8) interacts with the cantilever (5b) of the adjustment element (5).

4. The opening device according to any one of claims 1 to 3, characterized in that The two rods (7, 8) load the adjustment element (5) in sequence.

5. The opening device according to claim 4, characterized in that: Starting from the end position, the adjusting element (5) is acted upon first by the short rod (7) and then by the long rod (8).

6. The opening device according to any one of claims 1 to 5, characterized in that The two rods (7, 8) are coaxially coupled to a transmission wheel (4) of an electric drive (1 to 4).

7. The opening device according to any one of claims 1 to 6, characterized in that The two rods (7, 8) have an angular distance (α) of approximately 20° to 40° relative to each other.

8. The opening device according to claim 6 or 7, characterized in that: The transmission wheel (4) belongs to a transmission mechanism (2, 3, 4), in particular a reduction transmission mechanism (2, 3, 4), which is loaded by the motor (1) of the electric drive device (1 to 4).

9. The opening device according to any one of claims 1 to 8, characterized in that The adjusting element (5) is designed as an adjusting slide block (5) capable of linear movement.

10. The opening device according to claim 9, characterized in that The adjusting slide (5) is equipped with at least two stop shaped parts (5a, 5b) which are used to interact with the associated stop edges (7a, 8a) of the associated levers (7, 8).

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