Cage structure and method for assembling a main shaft drive in a cage structure of a double-decker elevator

Abstract

A travel basket structure (2) comprising a first travel basket (3), a second travel basket (4) and a travel basket frame (5); wherein the travel baskets are arranged on top of each other in the travel basket frame; at least the first travel basket is movable in the direction of a vertical axis (z) along the travel basket frame by means of a spindle drive (8); the spindle drive comprises a spindle (9) and a drive unit (10); wherein the spindle drive is guided through a recess (12) in a carrier structure (13) of the travel basket frame and the drive unit has a housing (11) with a fixing flange (16) by which the housing is fixed on the carrier structure, the housing is positionable in a first position and a second position relative to the recess; the fixing flange opens the recess in the first position so that the spindle drive can be guided through the recess in the direction of the vertical axis, and in the second position projects beyond an outer edge (17) of the recess.

Description

Technical Field

[0001] This invention relates to a travel basket structure for a double-deck elevator. The invention also relates to a double-deck elevator having such a travel basket structure and a method for assembling a spindle drive in such a travel basket structure. Background Technology

[0002] In order to transport people and / or objects between floors of a building, in addition to single-carriage elevators, so-called double-deck elevators or double-deck elevators can also be used. Double-deck elevators are primarily characterized by their carriage frames, in which two carriages or elevator cars are arranged stacked on top of each other. By moving the carriage frame in which the carriages are arranged, the carriages can move together, thus stopping simultaneously on two overlapping floors.

[0003] Because floor heights within a building may vary, double-decker elevators are typically equipped with an adjustment mechanism that adapts to the vertical distance between the two travel baskets, for example, by automatically adjusting during the journey to the next stop.

[0004] The adjustment mechanism may include, for example, one or more electric spindle drives. For maintenance and repair purposes, such spindle drives should be easily accessible and assembled (disassembled) in the elevator shaft, even after a double-deck elevator has been installed.

[0005] EP 1 074 503 B1 illustrates an example of a double-deck elevator with two spindle drives for vertically adjusting two travel baskets within a travel basket frame. Each spindle drive includes a drive motor mounted above the travel basket frame. Summary of the Invention

[0006] Therefore, there is a need for a travel basket structure for double-decker elevators that allows for particularly simple assembly (disassembly) of the spindle drive.

[0007] In addition, a double-deck elevator that is easy to repair and / or maintain is required.

[0008] There will also be a need for a method that allows for easy assembly (disassembly) of the spindle drive in the travel basket structure of a double-decker elevator.

[0009] These needs can be met by the subject matter of the independent claims. Advantageous embodiments are set forth in the dependent claims, the following description, and the accompanying drawings.

[0010] A first aspect of the invention relates to a travel basket structure for a double-deck elevator. The travel basket structure includes a first travel basket, a second travel basket, and a travel basket frame, the travel basket frame being displaceable in the longitudinal direction of the elevator shaft within the double-deck elevator shaft. When the double-deck elevator is in an operational state, the first and second travel baskets are arranged overlapping each other within the travel basket frame. At least the first travel basket is movable along the travel basket frame in the direction of a vertical axis by means of a spindle drive. The spindle drive includes a spindle mechanically coupled to the first travel basket and a drive unit for driving the spindle. The spindle drive is guided through a notch in a carrier structure of the travel basket frame. The drive unit has a housing with a fixing flange by means of which the housing is fixed to the carrier structure. The housing can be positioned in a first position and a second position relative to the notch. In the first position, the fixing flange opens the notch, allowing the spindle drive to be guided through the notch in the direction of the vertical axis, and in the second position, it extends beyond the outer edge of the notch.

[0011] The travel basket frame can be considered as a frame-like structure composed of multiple carriers and / or carrier structures. For example, in the operational state of a double-deck elevator, the travel basket frame can be guided by at least one guide shoe and / or guide roller anchored to a vertically extending guide rail in the elevator shaft.

[0012] In its simplest form, the travel basket frame can consist of, for example, two (horizontal) transverse carriers and two (vertical) longitudinal carriers, connected by the transverse carriers to form the frame. Within this frame, the travel baskets can be arranged stacked on top of each other. For example, each longitudinal carrier can be guided on a guide rail.

[0013] As mentioned at the beginning, by moving the travel basket frame along one or more guide rails, the first and second travel baskets can be moved together in the elevator shaft, thereby stopping simultaneously on two overlapping floors.

[0014] With the help of the spindle drive, the vertical distance between the first and second travel baskets can be adjusted, for example, to adapt the vertical distance to different floor heights within a building.

[0015] Additionally or alternatively, the spindle drive may be designed to move the first travel basket in the opposite direction to the second travel basket along the travel basket frame in the direction of the vertical axis, i.e., the two travel baskets move closer to or further away from each other simultaneously.

[0016] The drive unit may include, for example, an electric drive motor and a transmission mechanism that connects the drive motor's drive shaft to the spindle. Therefore, the drive motor and transmission mechanism can be housed within a housing. The drive unit can also be designed without a transmission mechanism, allowing the drive motor to be directly connected to the spindle. Thus, the spindle drive can be designed as a so-called direct spindle drive.

[0017] The main shaft is rotatably supported in a main shaft nut, which can be secured to the first travel basket in a suitable manner. By rotating the main shaft, the vertical distance between the drive unit and the main shaft nut, i.e., between the carrier structure and the first travel basket, can be shortened or lengthened depending on the direction of rotation.

[0018] The first and second positions of the housing can be different angular positions related to the longitudinal axis of the housing. In other words, the housing is capable of rotating about its longitudinal axis together with the fixed flange between the first and second positions relative to the recess.

[0019] A fixed flange can be understood as a plate-like or disc-like protrusion projecting from the housing body. Fixed flanges can project from the housing body, particularly on opposite sides. This allows the housing to be securely fixed to the carrier structure. Mounting flanges can be arranged between the two ends of the housing. Alternatively, the fixed flange can terminate flush with one end of the housing body, meaning the fixed flange is part of the end face of the housing body. The fixed flange can completely or partially surround the housing body in the circumferential direction.

[0020] In its simplest form, the carrier structure can be a transverse carrier of the travel basket frame. Carrier structures combining two or more carriers are also feasible. For example, an X-shaped carrier structure can be considered, consisting of a transverse member and an additional carrier fixed thereto and oriented at an angle relative to it. The additional carrier may have a notch for accommodating a spindle drive or two notches for accommodating one spindle drive (see below). The transverse member can, for example, securely connect two longitudinal members of the travel basket frame to each other.

[0021] A notch can be understood as a continuous opening in a carrier structure, connecting the upper and lower sides of the carrier structure.

[0022] To save space, it is preferable that the drive unit and the main shaft share a common longitudinal axis, i.e., they are arranged coaxially with respect to the longitudinal axis of the main shaft drive. In this case, when the double-deck elevator is in operation, the main shaft drive can be oriented in the travel basket frame, for example, such that the main shaft extends upward from the drive unit in a direction parallel to the vertical axis, i.e., the main shaft can be mounted vertically. Depending on the type of elevator, other configurations of the main shaft drive can also be considered, such as the main shaft being mounted in a suspended manner.

[0023] The drive unit can be suspended and fixed to the carrier structure, for example, by partially extending into the recess and partially extending out of the recess on one or both sides. However, vertical assembly of the drive unit is also possible.

[0024] A notch with a rotatable housing or fixed flange can be considered a type of bayonet lock, enabling a quick-establishing and disengaging profile-locking connection between the carrier structure and the spindle drive. This, in turn, allows the spindle drive to be easily inserted into or removed from the carrier structure without disassembling the travel basket structure or other components of the double-decker elevator, such as the travel basket, hoisting device, or yoke. Thus, despite the limited space in the elevator shaft, the spindle drive can be repaired and / or maintained effortlessly.

[0025] A second aspect of the invention relates to a double-deck elevator. The double-deck elevator includes an elevator shaft and at least one travel basket structure, the travel basket frame of which, as described in the context, is arranged in the elevator shaft in a manner capable of displacement along its longitudinal direction. This double-deck elevator can be repaired and / or maintained particularly easily due to the simplified assembly (disassembly) of the spindle drive.

[0026] A third aspect of the invention relates to a method for mounting a spindle drive in a travel basket structure, as described in the context. The method comprises at least the following steps, which may be performed, for example, in the order given below: (i) arranging the spindle drive opposite a recess in the carrier structure of the travel basket frame, wherein the housing of the spindle drive is positioned in a first position opposite the recess such that a mounting flange of the housing opens the recess; (ii) passing the spindle drive through the recess along a vertical axis; (iii) rotating the housing to a second position such that the mounting flange extends beyond the outer edge of the recess; and (iv) securing the housing to the carrier structure via the mounting flange.

[0027] In step (ii), the fixed flange can be moved, for example, from a position below the notch to a position above the notch.

[0028] In an additional step, the spindle may be mechanically coupled to the first travel basket, for example by securing the spindle nut mounted on the spindle to the first travel basket, such as to its base frame. This step may be performed before or after step (iv), but after step (ii).

[0029] A corresponding method for removing the spindle drive from the carriage structure may include, for example, the following steps: (v) separating the housing from the carrier structure; (vi) rotating the housing back to a first position; and (vii) passing the spindle drive through a notch along the vertical axis to remove the spindle drive.

[0030] In step (vii), the threading through the spindle drive can be in the opposite direction to that in step (ii).

[0031] This method significantly simplifies the assembly (disassembly) of the spindle drive compared to traditional methods.

[0032] The features of this method can also be understood as the features of the driving basket structure described in the context, and conversely, the features of the driving basket structure can also be the features of this method.

[0033] Without limiting the scope of the invention in any way, embodiments of the invention can be considered as being based on the concepts and understandings described below.

[0034] According to one embodiment, the carrier structure can form the base plate of the travel basket frame. In other words, when the double-deck elevator is in an operational state, the first elevator car and the second elevator car can be arranged within the travel basket frame above the base plate, i.e., above the carrier structure. This allows the spindle drive to be inserted into the carrier structure from below.

[0035] According to one embodiment, in the operational state of a double-deck elevator, a first travel basket can be arranged below a second travel basket. This improves accessibility to the first travel basket and / or the spindle drive connected to the first travel basket from below the travel basket structure in the elevator shaft, for example, to achieve maintenance and / or repair purposes.

[0036] According to one embodiment, the retaining flange in the second position can extend beyond the outer edge of the notch on the opposite side of the notch. Therefore, the retaining flange can be supported on the carrier structure on both sides. This improves the support of the spindle drive on the carrier structure.

[0037] According to one embodiment, the fixed flange can be fixed to the carrier structure via a buffer element. The buffer element can be at least partially arranged between the fixed flange and the carrier structure. Furthermore, the buffer element can at least partially surround the housing. The buffer element can be at least partially made of a material particularly designed for vibration damping, such as an elastomer or another suitable synthetic material, such as polyurethane. Thus, during the operation of a double-deck elevator, the transmission of undesirable vibrations between the carrier structure and the spindle drive can be avoided or significantly reduced.

[0038] According to one embodiment, the fixed flange and the buffer element can be screwed together. Alternatively, the buffer element and the carrier structure can be screwed together. This further simplifies the assembly (disassembly) of the spindle drive.

[0039] According to one embodiment, the buffer element can be divided into at least two separate components that can be assembled and / or disassembled separately from each other. If the buffer element is implemented as a stack of multiple layers (see below), the buffer element can be divided into multiple separate components, for example, transverse to the stacking direction of the layers. This simplifies the assembly (disassembly) of the buffer element. For example, this avoids the need to disassemble other components of the carriage structure for assembling (disassembling) the buffer element.

[0040] According to one embodiment, the cushioning element can be composed of at least two layers stacked on top of each other. These layers can be different from each other in terms of material. In other words, the cushioning element can be implemented as a stack of multiple layers stacked on top of each other along the stacking direction. Here, these layers can be used in a suitable manner, i.e., force-locked, surface-locked, and / or material-locked connected to each other. For example, one layer can be a carrier layer made of a relatively strong material (e.g., metal), while the other layer can be a cushioning layer made of a relatively damping material (e.g., synthetic material). Thus, the damping characteristics of the cushioning element can be specifically adapted without affecting its strength.

[0041] According to one embodiment, the buffer element may consist of two outer layers and at least one intermediate layer disposed between the two outer layers. The material of the intermediate layer may differ from that of the outer layers. For example, each outer layer may be made of a relatively robust material (e.g., metal), while the intermediate layer may be made of a relatively damping material (e.g., composite material). Thus, the intermediate layer can be stabilized and / or protected from mechanical damage on both sides. For example, in the assembled state of the spindle drive, the outer layers can protect the intermediate layer from direct contact with the fixed flange and / or carrier structure.

[0042] According to one embodiment, the intermediate layer may be a layer of synthetic material, such as an elastomer or polyurethane layer. Additionally or alternatively, the outer layer may be a metal layer. This enables the creation of cushioning elements that require particularly little maintenance and are also relatively inexpensive to provide.

[0043] According to one embodiment, a first travel basket can be moved along a travel basket frame in a vertical direction by means of two main shaft drives. Each main shaft drive may include a main shaft mechanically coupled to the first travel basket and a drive unit for driving the main shaft. The main shaft drives can be guided through different recesses in the carrier structure. Each drive unit may have a housing with a fixed flange, which can be positioned in a first position and a second position relative to the respective recess. The two main shaft drives may, for example, be designed to be structurally identical and / or capable of being assembled (disassembled) in the same or similar manner as described in the examples of (individual) main shaft drives in conjunction with the context. The main shaft drives can be mounted diagonally opposite each other on the travel basket frame. Thus, the travel basket can be reliably vertically adjusted even under high loads. Furthermore, by using two main shaft drives, the risk of the travel basket tilting when moving along the frame can be reduced.

[0044] The second travel basket can also be moved along the travel basket frame in the vertical direction by means of one or more spindle drives. The spindle drives can be designed similarly to the spindle drives of the first travel basket.

[0045] For example, one could consider a first and second travel basket that can be moved along the travel basket frame using the same spindle drive or multiple identical spindle drives. This allows the travel baskets to move simultaneously without changing the vertical distance between them.

[0046] Alternatively, the first and second travel baskets can be moved along the travel basket frame via different spindle drives. This allows the travel baskets to move independently of each other.

[0047] According to one embodiment, the second travel basket can be fixed in the travel basket frame along the vertical axis. Since only one travel basket can be moved, the self-weight of the travel basket structure can be kept low. In addition, this method can reduce manufacturing and assembly costs.

[0048] According to one embodiment, the housing can be secured to the carrier structure in a second position by means of a fixing flange. Specifically, this ensures that the housing does not vertically slip during the operation of the double-deck elevator, even if the threaded connection of the fixing flange loosens for unforeseen reasons. Attached Figure Description

[0049] The preferred embodiments of the present invention will be further described below with reference to the accompanying drawings, but the drawings and descriptions are not intended to limit the present invention in any way.

[0050] Figure 1 A double-decker elevator according to an embodiment of the present invention is shown.

[0051] Figure 2 A top view of a portion of the carrier structure of the travel basket structure according to an embodiment of the present invention is shown during the assembly (disassembly) of the spindle drive.

[0052] Figure 3 A top view showing a cross-section of the carrier structure equipped with a spindle drive.

[0053] Figure 4 Shown along section line IV-IV Figure 3 A cross-sectional view of the carrier structure in the image.

[0054] The accompanying drawings are schematic only and not drawn to scale. The same reference numerals denote the same or equivalent features in each drawing. Detailed Implementation

[0055] Figure 1 The double-deck elevator 1 is shown in an operational state. The double-deck elevator 1 includes a travel basket structure 2 consisting of a first travel basket 3, a second travel basket 4, and a travel basket frame 5.

[0056] In the elevator shaft 6 of the double-decker elevator 1, vertically extending guide rails 7 can be anchored, and the travel basket frame 5 can move between the guide rails 7 in the direction of the vertical axis z (hereinafter referred to as the z direction), that is, it is movably supported in the longitudinal direction of the elevator shaft 6.

[0057] Two travel baskets 3 and 4 are arranged stacked on top of each other in the travel basket frame 5. In this example, the first travel basket 3 is located below the second travel basket 4. However, it is also feasible to arrange the two travel baskets 3 and 4 in the opposite manner in the travel basket frame 5.

[0058] By moving the travel basket frame 5 along the guide rail 7 in the elevator shaft 6, the two travel baskets 3 and 4 can move together and thus be simultaneously on two adjacent, i.e., directly above and below each other, floors.

[0059] Floor heights within a building may vary. For example, the vertical distance between two adjacent floors may decrease as the building height increases, especially in high-rise buildings. Therefore, the vertical distance between the two travel baskets 3 and 4 within the travel basket frame 5 should be adapted accordingly.

[0060] For this purpose, at least one of the travel baskets 3 and 4 (here, for example, the lower first travel basket 3) is movably supported in the travel basket frame 5 in the z direction.

[0061] However, the second travel basket 4 can be securely connected to the travel basket frame 5, that is, fixed to the travel basket frame 5 in the z direction.

[0062] The vertical adjustment of the first travel basket 3 can be achieved, for example, by means of two (identical) spindle drives 8, each having a spindle 9 and a drive unit 10 for driving, that is, rotating the spindle 9 by means of a motor.

[0063] Each drive unit 10 includes a housing 11 in which an electric drive motor may be arranged, and optionally a transmission device for connecting the drive motor to the corresponding spindle 9.

[0064] Each spindle drive 8 is guided through a specially designed notch 12 in the carrier structure 13 of the travel basket frame 5.

[0065] In this example, the carrier structure 13 forms the base plate 14 of the driving basket frame 5, meaning that both driving baskets 3 and 4 are located above the carrier structure 13. Therefore, the first driving basket 3 is movably supported in the longitudinal section of the driving basket frame 5 located between the carrier structure 13 and the first driving basket 4 along the z-direction.

[0066] The spindles 9 can also be guided through the base frame 15 of the first travel basket 3. For example, spindle nuts (not shown) fixed to and / or in the base frame 15 can be placed on each spindle 9.

[0067] Each housing 11 also has a fixing flange 16, through which the housing 11 and the corresponding spindle driver 8 are fixed to the carrier structure 13.

[0068] For example, the housing 11 can be suspended in the corresponding recess 12, wherein the fixing flange 16 can be placed on the upper side of the carrier structure 13 facing the base frame 15.

[0069] As in Figure 1 As can be seen, the spindle 9 of the same spindle driver 8 and the drive unit 10 can have a common longitudinal axis, wherein the spindle 9 can extend upward in the z-direction from the drive unit 10 toward the first travel basket 3. The spindle 9 can be rotatably supported at its free end in a corresponding spindle bearing of the travel basket frame 5.

[0070] By rotating the main shaft 9 in the corresponding main shaft nut (not shown) with the aid of the corresponding drive unit 10, the vertical distance between the carrier structure 13 and the base frame 15 is shortened or lengthened according to the direction of rotation, that is, the first travel basket 3 moves toward or away from the second travel basket 4 (fixed in the travel basket frame 5).

[0071] To simplify the assembly (disassembly) of the spindle drive 8, for example for maintenance or repair purposes, each fixed flange 16 can be aligned with two different positions relative to the corresponding recess 12 by rotating the corresponding housing 11 about its longitudinal axis.

[0072] Figure 2 The mounting (dismounting) position of the retaining flange 16 is shown, in which the retaining flange 16 can be guided unimpeded through the recess 12 in the z-direction. The recess 12 is large enough that, in the mounting (dismounting) position, not only the retaining flange 16 but also the remaining spindle drive 8, i.e., the spindle 9 and drive unit 10 and its housing 11, can be guided through the recess 12 in the z-direction.

[0073] Figure 3 The fixed position of the fixing flange 16 is shown. The fixing flange 16 is inserted into the fixed position, for example, by means of the following: Figure 3 The housing 11, which is not shown in the figure and has a fixed flange 16 mounted on it, rotates 90 degrees around its longitudinal axis from the assembled (disassembled) position.

[0074] In the fixed position, the retaining flange 16 extends beyond the outer edge 17 of the recess 12. This prevents the spindle drive 8 from protruding in the z-direction. Figure 3 As shown from the perspective away from the observer, it is guided through the notch 12.

[0075] For example, the fixed flange 16 can extend beyond the outer edge 17 on both sides, which improves the support of the spindle drive 8 on the carrier structure 13.

[0076] The fixed flange 16 can be directly or optionally fixed to the carrier structure 13 by means of a damping element 18. Here, the damping element 18 can be arranged between the fixed flange 16 and the carrier structure 13, such as from... Figure 4 As can be seen in the text.

[0077] For example, the fixed flange 16 can be screwed into the buffer element 18 with multiple screws 19, and the buffer element 18 can be screwed into the carrier structure 13 with multiple screws 19.

[0078] The buffer element 18 may consist of two or more separate components 20. The separate components 20 may be assembled (disassembled) separately from each other. For example, the separate components 20 may at least partially surround the drive unit 10 and / or the housing 11 in the assembled state.

[0079] like Figure 4 As shown, the buffer element 18 can be composed of multiple layers 21 and 22 of different materials stacked on top of each other. Here, it consists of two stabilizing outer metal layers 21 and a damping composite material layer located between the two outer layers 21 as an intermediate layer 22. Here, one of the outer layers 21 can be placed on the fixed flange 16, while the other outer layer 21 can be placed on the carrier structure 13.

[0080] The following is an example of a method for assembling a spindle drive 8 in a travel basket structure 2.

[0081] First, the spindle driver 8 is arranged opposite to the recess 12, specifically, the housing 11 is aligned with the recess 12 in the assembly (disassembly) position with its fixing flange 16.

[0082] Then, a suitable lifting device (e.g., a crane) can be used to lift the spindle drive 8 in the z direction, and here the spindle drive is guided from below through the notch 12 until the retaining flange 16 is above the notch 12.

[0083] Next, the housing 11 is rotated to a fixed position.

[0084] Now, the individual component 20 of the buffer element 18 is positioned on the carrier structure 13 and screwed into the carrier structure, but the screws 19 involved are not fully tightened.

[0085] Then lower the spindle drive 8 again until the fixed flange 16 lies flat on the buffer element 18.

[0086] Then, screw the fixing flange 16 into the buffer element 18, but do not fully tighten the screws 19 involved.

[0087] Now, you can also align the spindle driver 8.

[0088] Only after the spindle drive 8 has been properly aligned should the screw 19 be fully tightened.

[0089] Accordingly, the spindle driver 8 can be disassembled in the reverse order.

[0090] Finally, it should be noted that terms such as "having" or "comprising" do not exclude other elements or steps, and indefinite articles such as "a" or "one" do not exclude multiple. It should also be noted that features or steps described with reference to one of the above embodiments can also be used in combination with features or steps described with reference to other embodiments described above. Reference numerals in the claims should not be considered limiting.

Claims

1. A traveling basket structure for a double-decker elevator (1), wherein, The driving basket structure (2) includes: First driving basket (3); Second driving basket (4); and The travel basket frame (5) is arranged in the elevator shaft (6) of the double-decker elevator (1) in a longitudinal direction that allows it to be moved. The first travel basket (3) and the second travel basket (4) are arranged stacked on top of each other in the travel basket frame (5) when the double-decker elevator (1) is in an operational state. At least the first travel basket (3) can move along the travel basket frame (5) in the direction of the vertical axis (z) by means of the main shaft drive (8); The spindle drive (8) includes a spindle (9) mechanically connected to the first travel basket (3) and a drive unit (10) for driving the spindle (9); Its features are: The spindle drive (8) guides through the notch (12) in the carrier structure (13) through the travel basket frame (5), and the drive unit (10) has a housing (11) with a fixing flange (16) which is fixed to the carrier structure (13) by means of the fixing flange (16). The housing (11) can be positioned in a first position and a second position relative to the notch (12); In the first position, the fixed flange (16) opens the notch (12) so that the spindle drive (8) can be guided through the notch (12) in the direction of the vertical axis (z), and in the second position, it extends beyond the outer edge (17) of the notch (12).

2. The traveling basket structure according to claim 1, wherein, The carrier structure (13) forms the base plate (14) of the driving basket frame (5).

3. The travel basket structure according to any one of the preceding claims, wherein, The first driving basket (3) is positioned below the second driving basket (4).

4. The travel basket structure according to any one of the preceding claims, wherein, In the second position, the fixing flange (16) extends beyond the outer edge (17) of the recess (12) on the opposite sides of the recess (12).

5. The travel basket structure according to any one of the preceding claims, wherein, The fixed flange (16) is fixed to the carrier structure (13) via the buffer element (18).

6. The driving basket structure according to claim 5, wherein, The fixing flange (16) and the buffer element (18) are screwed together; and / or The buffer element (18) and the carrier structure (13) are screwed together.

7. The driving basket structure according to claim 5 or 6, wherein, The buffer element (18) is divided into at least two separate parts (20) that can be assembled and / or disassembled separately from each other.

8. The traveling basket structure according to any one of claims 5 to 7, wherein, The buffer element (18) consists of at least two overlapping layers (21, 22) that are different from each other in terms of material.

9. The traveling basket structure according to claim 8, wherein, The buffer element (18) consists of two outer layers (21) and at least one intermediate layer (22) disposed between the two outer layers (21), the intermediate layer (22) being different from the outer layers (21) in terms of its material.

10. The driving basket structure according to claim 9, wherein, The intermediate layer (22) is a layer of synthetic material; and / or The outer layer (21) is a metal layer.

11. The travel basket structure according to any one of the preceding claims, wherein, The first travel basket (3) can move along the travel basket frame (5) in the direction of the vertical axis (z) by means of two main shaft drives (8); Each spindle drive (8) includes: a spindle (9) mechanically connected to the first travel basket (3) and a drive unit (10) for driving the spindle (9); The spindle drive (8) is guided through different notches (12) in the carrier structure (13), and each drive unit (10) has a housing (11) capable of being positioned in a first position and a second position relative to the corresponding notch (12), the housing having a fixed flange (16).

12. The travel basket structure according to any one of the preceding claims, wherein, The second travel basket (4) is fixed in the travel basket frame (5) in the direction of the vertical axis (z).

13. The travel basket structure according to any one of the preceding claims, wherein, In the second position, the housing (11) is fixed to the carrier structure (13) via a fixing flange (16).

14. A double-decker elevator, comprising: Elevator shaft (6); as well as At least one travel basket structure (2) according to any one of the preceding claims, wherein the travel basket frame (5) of the travel basket structure (2) is arranged in the elevator shaft (6) in a manner that allows it to be displaced along its longitudinal direction.

15. A method for assembling a spindle drive in a travel basket structure according to any one of claims 1 to 13, the method comprising: The spindle drive (8) is arranged relative to the notch (12) in the carrier structure (13) of the travel basket frame (5), wherein the housing (11) of the spindle drive (8) is positioned in a first position relative to the notch (12) such that the fixing flange (16) of the housing (11) opens the notch (12). Guide the spindle drive (8) through the notch (12) in the direction of the vertical axis (z); Rotate the housing (11) to the second position so that the fixing flange (16) extends beyond the outer edge (17) of the recess (12); and The shell (11) is fixed to the carrier structure (13) via the fixing flange (16).

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