CN213356592U

CN213356592U - Elevator, braking device and transmission assembly

Info

Publication number: CN213356592U
Application number: CN202021356564.6U
Authority: CN
Inventors: 蒙良勇; 陈东
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-06-04
Anticipated expiration: 2030-07-10

Abstract

The utility model relates to an elevator, arresting gear and drive assembly, drive assembly include first driving medium, second driving medium, third driving medium and are used for connecting the fourth driving medium of third driving medium and braking voussoir, first driving medium with the relative interval of second driving medium sets up, the one end of first driving medium reaches the one end of second driving medium all is used for rotating with carrying the lift pivot and is connected, the other end of first driving medium reaches the other end of second driving medium all with the third driving medium is connected, just first driving medium the second driving medium reaches the third driving medium encloses and establishes into the first cavity that is used for corresponding the setting with external part. The mounting position of external parts can overlap with transmission assembly's motion stroke emergence to can reduce the mounting height of external parts such as guide shoe, guide rail lubricating arrangement, and then can the interior space of effectual utilization well, reduced the top layer height requirement of well.

Description

Elevator, braking device and transmission assembly

Technical Field

The utility model relates to an elevator technical field especially relates to an elevator, arresting gear and drive assembly.

Background

The elevator is increasingly popularized, the safety performance of the elevator is increasingly emphasized, and in order to ensure that braking can be realized in an emergency situation, a safety gear and a speed limiter need to be arranged. When the elevator runs at an overspeed, the lifting rotating shaft of the speed limiter rotates, so that the transmission assembly is pulled to move, and the braking wedge block of the safety tongs is pulled to clamp the guide rail to realize braking. Because the safety gear usually sets up in the bottom of car and the overspeed governor usually sets up in the top of car, traditional drive assembly will take great installation space in the vertical direction after with overspeed governor and safety gear transmission connection.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an elevator, a brake device, and a transmission assembly, which can occupy a large installation space in a vertical direction.

On one hand, the transmission assembly comprises a first transmission piece, a second transmission piece, a third transmission piece and a fourth transmission piece for connecting the third transmission piece and a brake wedge block, wherein the first transmission piece and the second transmission piece are arranged at an interval relatively, one end of the first transmission piece and one end of the second transmission piece are both used for being rotatably connected with a lifting rotating shaft, the other end of the first transmission piece and the other end of the second transmission piece are both connected with the third transmission piece, and the first transmission piece, the second transmission piece and the third transmission piece are enclosed into a first cavity for being arranged corresponding to an external part.

The transmission assembly of above-mentioned embodiment, because first cavity corresponds leads boots, outside parts such as guide rail lubricating arrangement set up, even transmission assembly moves towards being close to carry and carry the lift pivot direction, first driving medium, second driving medium and third driving medium also can not with lead boots, conflict interference takes place for outside parts such as guide rail lubricating arrangement, thereby can make and lead boots, the mounted position of outside parts such as guide rail lubricating arrangement takes place to overlap with transmission assembly's movement stroke, thereby can reduce and lead boots, the mounting height of outside parts such as guide rail lubricating arrangement, and then can the effectual space that utilizes in the well, the top layer height requirement of well has been reduced.

In one embodiment, the transmission assembly further includes a fifth transmission member and a sixth transmission member disposed at an interval, one end of the fifth transmission member and one end of the sixth transmission member are both fixedly connected to the lifting rotating shaft, the other end of the fifth transmission member is rotatably connected to one end of the first transmission member, and the other end of the sixth transmission member is rotatably connected to one end of the second transmission member.

In one embodiment, the transmission assembly further includes a seventh transmission member and an eighth transmission member, one end of the fifth transmission member and one end of the sixth transmission member are both fixedly connected to the seventh transmission member, and the eighth transmission member is used to connect the seventh transmission member and the lifting rotating shaft.

In one embodiment, the fifth transmission element and the sixth transmission element are arranged in axial symmetry with respect to a center axis of the eighth transmission element.

In one embodiment, the first transmission member and the second transmission member are disposed in axial symmetry with respect to a central axis of the fourth transmission member.

In another aspect, there is provided a brake apparatus including: the safety gear is provided with a braking wedge block; the speed limiter is provided with a lifting rotating shaft; and the transmission assembly; the transmission assembly is arranged between the brake wedge block and the lifting rotating shaft, and the lifting rotating shaft can drive the brake wedge block to brake through the transmission assembly.

According to the braking device of the embodiment, when the elevator runs at an overspeed, the lifting rotating shaft of the speed limiter rotates, so that the transmission assembly is pulled to move towards the direction away from the braking wedge block, and the braking wedge block is pulled to move to clamp the guide rail, so that braking is realized. Because transmission assembly is equipped with lead boots, the first cavity that external parts such as guide rail lubricating arrangement correspond the setting, even transmission assembly moves near to carry and draws the pivot direction also can not with lead boots, external parts such as guide rail lubricating arrangement take place conflict interference, can make and lead boots, the mounted position of external parts such as guide rail lubricating arrangement takes place to overlap with transmission assembly's motion stroke, thereby can reduce the mounted height of external parts such as lead boots, guide rail lubricating arrangement, and then can effectually utilize the space in the well, the top layer height requirement of well has been reduced.

In one embodiment, the braking device further includes a guiding component, and the guiding component is in guiding fit with both the first transmission member and the second transmission member.

In one embodiment, the guide assembly includes a first upright column and a second upright column which are oppositely arranged at an interval, the first upright column is in sliding fit with the first transmission piece, and the second upright column is in sliding fit with the second transmission piece.

In one embodiment, the braking device further comprises a mounting beam, the mounting beam is provided with a second cavity communicated with the first cavity, and the lifting rotating shaft is rotatably arranged in the second cavity.

In still another aspect, an elevator is provided that includes the braking apparatus.

The elevator of above-mentioned embodiment, the removal of drive assembly can not take place to contradict with outside parts such as guide shoe, guide rail lubricating arrangement and interfere, can the interior space of effectual utilization well, has reduced the top layer height requirement of well.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a brake apparatus according to an embodiment;

FIG. 2 is a schematic structural view of a transmission assembly of the braking device of FIG. 1;

FIG. 3 is a schematic structural view of a brake apparatus according to another embodiment;

fig. 4 is a schematic structural view of a transmission assembly of the braking apparatus of fig. 3.

Description of reference numerals:

100. the transmission component comprises a transmission component body 110, a first transmission piece 120, a second transmission piece 130, a third transmission piece 140, a fourth transmission piece 150, a first cavity 160, a fifth transmission piece 170, a sixth transmission piece 180, a seventh transmission piece 190, an eighth transmission piece 200, a lifting rotating shaft 300, an external part 410, a first upright post 420, a second upright post 500, an installation beam 510 and a second cavity.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1 to 4, in one embodiment, a transmission assembly 100 is provided, which includes a first transmission member 110, a second transmission member 120, a third transmission member 130, and a fourth transmission member 140 for connecting the third transmission member 130 and a brake wedge (not shown). The first transmission member 110 and the second transmission member 120 are disposed at an interval. One end of the first transmission member 110 and one end of the second transmission member 120 are both used for being rotatably connected with the lifting rotating shaft 200. The other end of the first transmission member 110 and the other end of the second transmission member 120 are connected to the third transmission member 130, and the first transmission member 110, the second transmission member 120 and the third transmission member 130 enclose a first cavity 150 disposed corresponding to the external component 300.

In the transmission assembly 100 of the above embodiment, when in use, one end of the first transmission element 110 and one end of the second transmission element 120 are both rotatably connected to the lifting shaft 200 of the governor, one end of the fourth transmission element 140 is connected to the brake wedge of the safety gear, and the first cavity 150 formed by enclosing the first transmission element 110, the second transmission element 120 and the third transmission element 130 is disposed corresponding to the external component 300 such as the guide shoe, the guide rail lubrication device, etc. When the elevator runs at an overspeed, the lifting rotating shaft 200 of the speed limiter rotates, so that the first transmission piece 110, the second transmission piece 120, the third transmission piece 130 and the fourth transmission piece 140 are pulled to move towards the direction far away from the brake wedge (the direction close to the lifting rotating shaft 200), and the brake wedge is pulled to move to clamp the guide rail, so that braking is realized.

In order to avoid interference between the motion of the conventional transmission assembly 100 and the external parts 300 such as the guide shoe and the guide rail lubricating device, the conventional method is to arrange the external parts 300 such as the guide shoe and the guide rail lubricating device above the motion stroke of the transmission assembly 100, so that a large installation space is occupied in the vertical direction, and the requirement on the height of the top layer of the hoistway is improved. In the transmission assembly 100 of the above embodiment, since the first cavity 150 is disposed corresponding to the external component 300 such as the guide shoe and the guide rail lubrication device, even if the transmission assembly 100 moves toward the direction (as shown in the direction a in fig. 1 and 3) close to the lifting shaft 200, the first transmission member 110, the second transmission member 120, and the third transmission member 130 do not interfere with the external component 300 such as the guide shoe and the guide rail lubrication device, so that the installation position of the external component 300 such as the guide shoe and the guide rail lubrication device can be overlapped with the movement stroke of the transmission assembly 100, the installation height of the external component 300 such as the guide shoe and the guide rail lubrication device can be reduced, the space in the hoistway can be effectively utilized, and the requirement for the top floor height of the hoistway can be reduced.

It should be noted that the first transmission element 110, the second transmission element 120, the third transmission element 130 and the fourth transmission element 140 may be integrally formed, or may be formed by separately forming and assembling. One end of the first transmission member 110 and one end of the second transmission member 120 are connected to the rotation of the lifting spindle 200, and can be connected or hinged through the spindles, and only the rotation of the lifting spindle 200 needs to drive the transmission assembly 100 to move towards the direction away from the brake wedge, so that the brake wedge clamps the guide rail to brake. The installation position of the external part 300 overlaps with the movement stroke of the transmission assembly 100, which means that the installation position of the external part 300 is between two ends of the movement stroke of the transmission assembly 100 in the vertical direction.

As shown in fig. 1 to 4, in one embodiment, the transmission assembly 100 further includes a fifth transmission member 160 and a sixth transmission member 170 disposed at an interval. One end of the fifth transmission member 160 and one end of the sixth transmission member 170 are both fixedly connected to the lifting rotating shaft 200 in an inserting fit or a clamping fit, the other end of the fifth transmission member 160 is rotatably connected to one end of the first transmission member 110, and the other end of the sixth transmission member 170 is rotatably connected to one end of the second transmission member 120. Therefore, when the lifting rotating shaft 200 rotates, the fifth transmission member 160 and the sixth transmission member 170 can be driven to move towards the direction away from the brake wedge, and further the first transmission member 110, the second transmission member 120, the third transmission member 130 and the fourth transmission member 140 are driven to move towards the direction away from the brake wedge, so that the brake wedge is pulled to clamp the guide rail, and braking is realized. Meanwhile, the fifth transmission member 160 is rotatably connected with the first transmission member 110 in a shaft hole fit manner or a hinge connection manner, and the sixth transmission member 170 is rotatably connected with the second transmission member 120 in a shaft hole fit manner or a hinge connection manner, so that the fifth transmission member 160 is obliquely arranged relative to the first transmission member 110 (the inclination angle is greater than 0 degree and less than 180 degrees) during use, and the sixth transmission member 170 is obliquely arranged relative to the second transmission member 120 (the inclination angle is greater than 0 degree and less than 180 degrees), thereby reducing the length of the transmission assembly 100 in the vertical direction. Moreover, the rotating torque of the lifting rotating shaft 200 is converted into lifting forces on the first transmission piece 110 and the second transmission piece 120 respectively through the fifth transmission piece 160 and the sixth transmission piece 170 which are arranged at intervals, so that the two sides of the third transmission piece 130 are uniformly stressed, the situation that the two sides of the third transmission piece 130 are unevenly stressed and incline in the moving process is avoided, and the brake wedge block can be reliably and stably pulled.

As shown in fig. 3 and 4, the transmission assembly 100 further includes a seventh transmission member 180 and an eighth transmission member 190. One end of the fifth transmission member 160 and one end of the sixth transmission member 170 are both connected to the seventh transmission member 180, and the eighth transmission member 190 is used for connecting the seventh transmission member 180 and the lifting/pulling shaft 200. Thus, when the lifting rotating shaft 200 rotates, the eighth transmission piece 190 and the seventh transmission piece 180 are driven to rotate around the central axis of the lifting rotating shaft 200, and then the first transmission piece 110 and the second transmission piece 120 are driven to face away from the direction of the brake wedge by the fifth transmission piece 160 and the sixth transmission piece 170, and then the brake wedge is pulled to clamp the guide rail by the third transmission piece 130 and the fourth transmission piece 140, so as to realize braking. Meanwhile, the eighth transmission piece 190 and the seventh transmission piece 180 convert the rotation moment into a pulling force on the first transmission piece 110 and the second transmission piece 120, so that the first transmission piece 110 and the second transmission piece 120 are stressed uniformly and can keep synchronous motion.

It should be noted that the fifth transmission member 160, the sixth transmission member 170, the seventh transmission member 180, and the eighth transmission member 190 may be integrally formed, or may be formed by separately forming and assembling. The eighth transmission member 190 may be connected to the seventh transmission member 180 and the lifting shaft 200 by means of insertion fitting or clamping.

Furthermore, the fifth transmission member 160 and the sixth transmission member 170 are disposed in axial symmetry with respect to the central axis of the eighth transmission member 190. Therefore, the stress of the fifth transmission member 160 and the sixth transmission member 170 is more balanced, so that the pulling force can be more balanced to the first transmission member 110 and the second transmission member 120, the balance of the stress is ensured, and the single-side lifting imbalance is avoided.

In any of the above embodiments, the first transmission member 110 and the second transmission member 120 are disposed in axial symmetry with respect to the central axis of the fourth transmission member 140. Therefore, the stress of the first transmission part 110 and the second transmission part 120 is more balanced, so that the pulling force can be more balanced to the third transmission part 130, the stress balance of the third transmission part 130 is ensured, and the fourth transmission part 140 can be stably and reliably used for pulling the brake wedge.

It should be noted that the first transmission member 110, the second transmission member 120, the third transmission member 130, the fourth transmission member 140, the fifth transmission member 160, the sixth transmission member 170, the seventh transmission member 180, and the eighth transmission member 190 may be plate-shaped, rod-shaped, or column-shaped, and only need to convert the rotation torque of the lifting/pulling shaft 200 into the pulling force for pulling the brake wedge.

As shown in fig. 1 and 3, in one embodiment, a braking device is provided, which includes a safety gear (not shown), a speed limiter (not shown) and the transmission assembly 100 of any of the above embodiments. Wherein, the safety gear is provided with a braking wedge block; the speed limiter is provided with a lifting rotating shaft 200; the transmission assembly 100 is disposed between the brake wedge and the lifting rotating shaft 200, and the lifting rotating shaft 200 can drive the brake wedge to brake through the transmission assembly 100.

In the braking device of the above embodiment, when the elevator runs at an overspeed, the pulling rotating shaft 200 of the speed limiter rotates, so that the transmission assembly 100 is pulled to move away from the braking wedge, and the braking wedge is pulled to move to clamp the guide rail, so as to realize braking. Because the transmission assembly 100 is provided with the first cavity 150 which corresponds to the external parts 300 such as the guide shoe and the guide rail lubricating device, even if the transmission assembly 100 moves towards the direction close to the lifting rotating shaft 200, the interference with the external parts 300 such as the guide shoe and the guide rail lubricating device can not occur, the installation positions of the external parts 300 such as the guide shoe and the guide rail lubricating device can be overlapped with the movement stroke of the transmission assembly 100, the installation heights of the external parts 300 such as the guide shoe and the guide rail lubricating device can be reduced, the space in the hoistway can be effectively utilized, and the requirement on the height of the top layer of the hoistway is reduced.

In one embodiment, the braking device further includes a guiding component (not labeled), and the guiding component is in guiding engagement with both the first transmission member 110 and the second transmission member 120. In this way, the guide assembly is used to guide the movement of the first transmission member 110 and the second transmission member 120, so as to ensure that the first transmission member 110 and the second transmission member 120 move on a preset track (for example, in a vertical direction), and thus the brake wedge can be reliably pulled to brake.

The guiding cooperation between the guiding assembly and the first transmission member 110 and the second transmission member 120 can be realized in a sliding fit manner, or in a rolling fit manner, and only the requirement that the first transmission member 110 and the second transmission member 120 can move on a preset track is met.

As shown in fig. 1 and 3, in one embodiment, the guiding assembly includes a first upright 410 and a second upright 420 disposed at an interval, the first upright 410 is slidably engaged with the first transmission member 110, and the second upright 420 is slidably engaged with the second transmission member 120. In this way, the first vertical column 410 is in sliding fit with the first transmission member 110, so that the first transmission member 110 slides along the length direction of the first vertical column 410, and the second vertical column 420 is in sliding fit with the second transmission member 120, so that the second transmission member 120 slides along the length direction of the second vertical column 420, and the fourth transmission member 140 can reliably pull the brake wedge to brake.

As shown in fig. 1 and 3, in one embodiment, the braking device further includes a mounting beam 500, the mounting beam 500 is provided with a second cavity 510 communicated with the first cavity 150, and the lifting spindle 200 is rotatably disposed in the second cavity 510. Thus, the guide shoe, the guide rail lubricating device and other external parts 300 can be fixedly arranged in the second cavity 510 in a riveting, screwing or clamping manner. Meanwhile, when the lifting rotating shaft 200 rotates, the movement of the transmission assembly 100 does not interfere with the external parts 300 such as the guide shoe, the guide rail lubricating device and the like installed in the second cavity 510, so that the external parts 300 such as the guide shoe, the guide rail lubricating device and the like can be installed at lower positions, and the requirement on the height of the top layer of the hoistway is lowered. Through holes communicated with the second cavity 510 may be formed in both sides of the mounting beam 500, and the lifting spindle 200 may pass through the two through holes, thereby realizing the rotational connection between the lifting spindle 200 and the mounting beam 500. Straight grooves for the seventh transmission member 180 to pass through can be formed in the two side walls of the mounting beam 500, so that interference on movement of the seventh transmission member 180 is avoided.

In one embodiment, an elevator is also provided, including the braking device of any of the above embodiments.

In the elevator of the embodiment, the movement of the transmission assembly 100 does not interfere with the guide shoe, the guide rail lubricating device and other external parts 300, so that the space in the hoistway can be effectively utilized, and the requirement on the height of the top layer of the hoistway is lowered.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A transmission assembly is characterized by comprising a first transmission piece, a second transmission piece, a third transmission piece and a fourth transmission piece for connecting the third transmission piece and a brake wedge block, wherein the first transmission piece and the second transmission piece are arranged at an interval relatively, one end of the first transmission piece and one end of the second transmission piece are both used for being rotatably connected with a lifting rotating shaft, the other end of the first transmission piece and the other end of the second transmission piece are both connected with the third transmission piece, and the first transmission piece, the second transmission piece and the third transmission piece are enclosed into a first cavity which is used for being arranged corresponding to an external part.

2. The transmission assembly according to claim 1, further comprising a fifth transmission member and a sixth transmission member disposed at an interval, wherein one end of the fifth transmission member and one end of the sixth transmission member are both fixedly connected to the lifting shaft, the other end of the fifth transmission member is rotatably connected to one end of the first transmission member, and the other end of the sixth transmission member is rotatably connected to one end of the second transmission member.

3. The transmission assembly according to claim 2, further comprising a seventh transmission member and an eighth transmission member, wherein one end of the fifth transmission member and one end of the sixth transmission member are both fixedly connected to the seventh transmission member, and the eighth transmission member is used to connect the seventh transmission member to the lifting shaft.

4. The drive assembly of claim 3, wherein the fifth drive member and the sixth drive member are disposed in axial symmetry about a central axis of the eighth drive member.

5. The transmission assembly according to any one of claims 1 to 4, wherein the first transmission member and the second transmission member are disposed axisymmetrically with respect to a central axis of the fourth transmission member.

6. A brake apparatus, comprising:

the safety gear is provided with a braking wedge block;

the speed limiter is provided with a lifting rotating shaft; and

the transmission assembly of any one of claims 1 to 5;

the transmission assembly is arranged between the brake wedge block and the lifting rotating shaft, and the lifting rotating shaft can drive the brake wedge block to brake through the transmission assembly.

7. A braking apparatus in accordance with claim 6, further comprising a guide assembly in guiding engagement with both the first transmission member and the second transmission member.

8. The brake apparatus of claim 7, wherein the guide assembly includes first and second spaced apart posts, the first post slidably engaging the first transmission member and the second post slidably engaging the second transmission member.

9. A braking apparatus in accordance with any one of claims 6 to 8, wherein the braking apparatus further comprises a mounting beam provided with a second cavity communicating with the first cavity, the lifting spindle being rotatably disposed within the second cavity.

10. Elevator, characterized in that it comprises a braking device according to any one of claims 6 to 9.