Drive device for a traction-free elevator

Abstract

The application discloses a driving device of a traction-free elevator, the cross section of a track is in the shape of an I-beam, the track comprises an upper flange, a lower flange and a connecting part, the two ends of the connecting part are connected to the middle part of the upper flange and the middle part of the lower flange respectively, the driving device comprises a limiting unit, an executing unit, a power unit and a force applying unit, the executing unit comprises a plurality of driving tires, the force applying unit is connected to the executing unit and tightly presses the driving tires on the side of the upper flange away from the connecting part, the power unit is connected to and drives the driving tires to rotate along the upper flange, the force applying unit is also connected to the limiting unit and tightly presses the limiting unit on the track, and the driving device is guided to run along the length direction of the track only. The driving tires are tightly pressed on the outer side of the upper flange of the track, the wheels of the limiting unit are tightly pressed between the upper flange and the lower flange, and the height of the track only needs to be greater than the outer diameter of the wheels of the limiting unit, so that the depth size of the shaft is reduced, the force applying unit is in a symmetrical structure, and the driving tires are uniformly pressed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of elevators, and particularly relates to a driving device of an elevator without a traction structure. BACKGROUND

[0002] In modern social and economic activities, an elevator has become an indispensable vertical transportation tool for carrying people or goods. Since the invention of the elevator in 1854, the elevator car has been running in a way of steel wire rope wheel traction drive, and a machine room, a traction motor and a speed reducer are arranged on the top floor of a building to drive a steel wire rope to pull the car and the counterweight to run on the track in the shaft. This driving mode makes it possible to run only one car in a single shaft, and the single-car running mode of the elevator can meet the use demand in low-rise buildings and floors with small passenger flow. With the rapid development of modern cities, high-rise buildings and super high-rise buildings with large population density are rising, and the shortcomings of long waiting time and low transportation efficiency of the single-car running mode of the elevator are being magnified. The traditional single-car elevator running mode has been difficult to meet the demand of the rapid development of modern urban buildings.

[0003] To improve the utilization rate of building space and the transportation efficiency of the elevator and reduce the cost of the building and the elevator, with the continuous development of engineering technology, a multi-car parallel elevator is being developed and applied. The multi-car parallel elevator adopts a non-traction steel wire rope direct drive technology, realizes the simultaneous running of multiple elevator cars in the same shaft, and the mutual switching of the elevators between shafts to realize overtake running. The tracks of different shafts are connected through switching tracks, and the connection between the track and the switching track is an arc-shaped track, or the switching track itself is an arc-shaped track.

[0004] Since the elevator is a non-traction steel wire rope, the elevator car needs to be driven by a driving device to realize the running along the track. The patent application with the application number 2020107515964 of the present applicant designs a driving device, and the track cross section is in the shape of an I-beam. The track includes an upper wing plate, a lower wing plate and a connecting portion. The upper wing plate and the lower wing plate are arranged in parallel and at intervals, and the two ends of the connecting portion are respectively connected to the middle part of the upper wing plate and the middle part of the lower wing plate, so as to form a track with a cross section in the shape of an I-beam. The driving tires are symmetrically arranged on the two sides of the connecting portion, the driving tires are located between the upper wing plate and the lower wing plate, the driving tires contact the connecting portion, and the connecting portion is compressed by a force applying unit. This arrangement requires that the height of the track (the distance between the upper wing plate and the lower wing plate) needs to be greater than the thickness of the tire. However, the high height of the track will lead to the increase of the depth size of the shaft, waste of shaft resources, and the force applying unit used is a cantilever structure, which increases the bending moment of the structure and causes the uneven compression of the tire. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application aims to provide a driving device of a traction-free elevator, which is characterized in that a force applying unit is used to press a driving tire against the outer side of an upper flange of a track, and a limiting unit wheel with an outer diameter smaller than that of the driving tire is pressed between the upper flange and a lower flange, so that the height of the track only needs to be greater than the outer diameter of the limiting unit wheel, the height of the track is relatively small, the depth of the shaft is reduced, the shaft resource is saved, the force applying unit is of a symmetrical structure, the bending moment of the structure is small, the driving tire is uniformly pressed, the service life of the driving tire is prolonged, the structure of the driving device is simplified, and the weight of the driving device is reduced.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] The present application provides a driving device of a traction-free elevator, wherein the elevator is traction-free, the driving device drives a car to run along a track, the cross section of the track is in the shape of an I-beam, the track comprises an upper flange, a lower flange and a connecting portion, the two ends of the connecting portion are connected to the middle portions of the upper flange and the lower flange respectively, the driving device comprises a limiting unit, an executing unit, a power unit and a force applying unit, the executing unit comprises at least one driving tire, the force applying unit is connected to the executing unit and tightly presses the driving tire against one side of the upper flange away from the connecting portion, the power unit is connected to and drives the driving tire to rotate in close contact with the upper flange, and the force applying unit is also connected to the limiting unit and tightly presses the limiting unit against the track, so that the driving device is guided to run only along the length direction of the track.

[0008] As a further improvement of the above technical scheme:

[0009] Preferably, at least one car runs along a single track or multiple cars switch to run between different tracks.

[0010] More preferably, when multiple cars switch to run between different tracks, the elevator comprises multiple cars, at least two main tracks and multiple switching tracks, the car is installed on a suspension device, a limiting guide device and the driving device are also installed on the suspension device, the switching track is used to connect two different main tracks, the main track or the switching track is defined as a track, the driving device drives the suspension device to drive the car to run along the main track and switch to run along the switching track to other main tracks.

[0011] The limiting unit is located between the upper flange and the lower flange, and the limiting unit is symmetrically attached to the two side surfaces of the connecting portion.

[0012] The limiting unit is also attached to the upper flange.

[0013] The executing unit comprises a driving shaft and two driving tires, the two driving tires are coaxially sleeved on the driving shaft, and the two driving tires are arranged in parallel and at intervals.

[0014] The power unit comprises a driving motor connected to and driving the driving tire to rotate.

[0015] The limiting unit is provided with four groups, and the four groups of limiting units are respectively arranged on the two sides of the connecting part.

[0016] The limiting unit comprises a limiting shaft and at least one lower limiting stabilizing wheel, the lower limiting stabilizing wheel is sleeved on the limiting shaft through a bearing, the lower limiting stabilizing wheel rolls in close contact with the upper wing plate, and one end of the limiting shaft is connected with the driving shaft through a set of force applying units.

[0017] The limiting unit further comprises a lateral limiting stabilizing wheel, the lateral limiting stabilizing wheel is rotatably installed at one end of the limiting shaft, and the lateral limiting stabilizing wheel rolls in close contact with the connecting part.

[0018] The force applying unit is connected with the driving shaft through a force applying frame, and the two ends of the driving shaft are respectively connected with one force applying frame.

[0019] The force applying unit comprises a force applying seat, at least one elastic component and at least one force applying assembly, the force applying seat is sleeved on the limiting shaft, the two ends of the force applying assembly are respectively connected with the force applying seat and one end of the force applying frame, and the elastic component is located at the connection between the force applying seat and the force applying assembly and / or the connection between the force applying frame and the force applying assembly.

[0020] The beneficial effects of the present application are that the driving tire is pressed on the outer side of the upper wing plate of the track through the force applying unit, the wheels of the limiting unit with a smaller outer diameter than the driving tire are pressed between the upper wing plate and the lower wing plate, the height of the track only needs to be greater than the outer diameter of the wheels of the limiting unit, the height of the track is smaller, the depth size of the shaft is reduced, the shaft resource is saved, the force applying unit is a symmetrical structure, the bending moment of the structure is smaller, the tire is uniformly pressed, the service life of the tire is improved, the structure of the driving device is simplified, and the weight of the driving device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structural schematic diagram of one embodiment of the present application;

[0022] Fig. 2 is a structural schematic diagram of another view of one embodiment of the present application;

[0023] Fig. 3 is a structural schematic diagram in which the driving motor and the brake are respectively located in one driving tire of one embodiment of the present application. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the present application.

[0025] For the purpose of describing the present application, spatial relative terms, such as "above", "upper", "top", "bottom", and the like, can be used herein for describing the spatial relationship between one device or feature and another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if a device in the drawings is inverted, then a device described as "above" or "on" other devices or structures would then be oriented "below" or "on" the other devices or structures. Accordingly, the exemplary term "above" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptions used herein interpreted accordingly.

[0026] A drive device of a traction-free elevator, as shown in Figs. 1-3 The elevator is traction-free, and the elevator comprises at least one car, the car is mounted on a suspension device, the suspension device is further mounted with a drive device, and the drive device drives the suspension device and the car to run along a track 1.

[0027] The elevator comprises two cases: at least one car runs along a single track and multiple cars switch between different tracks. When at least one car runs along a single track, the track 1 is a straight track. When multiple cars switch between different tracks, the elevator comprises multiple cars, at least two main tracks and multiple switching tracks, the car is mounted on a suspension device, the suspension device is further mounted with a limit guide device and the drive device, the switching track is used to connect two different main tracks, the main track or switching track is defined as the track 1, and the drive device drives the suspension device to drive the car to run along the main track and switch to other main track along the switching track.

[0028] The cross section of the track 1 is H-shaped, and the track 1 comprises an upper flange plate 11, a lower flange plate 12 and a connecting part 13, the upper flange plate 11 and the lower flange plate 12 are arranged in parallel and spaced apart. The two ends of the connecting part 13 are respectively connected to the middle part of the upper flange plate 11 and the middle part of the lower flange plate 12.

[0029] The drive device comprises a limiting unit, an executing unit, a power unit, a force applying unit 4 and a force applying frame 6.

[0030] The execution unit comprises a driving shaft 52, a bearing one 53, a bearing two 54 and two driving tires 51. The two driving tires 51 are coaxially sleeved on the driving shaft 52, and the two driving tires 51 are arranged in parallel and at intervals. Specifically, the driving tire 51 is in a cylindrical shape, the inner diameter of the driving tire 51 is greater than the outer diameter of the driving shaft 52, the driving tire 51 is provided with a radiation part 512, one end of the radiation part 512 is fixedly connected to the inner ring of the driving tire 51, and the other end of the radiation part 512 is fixedly connected to the driving shaft 52, so that the driving shaft 52 and the driving tire 51 are coaxially connected.

[0031] The power unit provides driving energy or driving and braking energy for the driving device. The power unit comprises a driving motor 21 and a brake 22. The driving motor 21 is connected to and drives one driving tire 51 to rotate. The motor shaft 211 of the driving motor 21 extends into the inner ring of the driving tire 51 to connect the radiation part 512 of one driving tire 51 and drive the radiation part 512 and the driving tire 51 to rotate. Specifically, the motor shaft 211 is a hollow shaft, the motor shaft 211 is sleeved on the driving shaft 52 through the bearing one 53 and the bearing two 54, so as to support and install the driving motor 21 and save space. The driving motor 21 drives one driving tire 51 to rotate, the driving tire 51 drives the driving shaft 52 connected thereto to rotate synchronously, and the driving shaft 52 drives the other driving tire 51 to rotate synchronously. In this way, the driving motor 21 drives the two driving tires 51 to rotate.

[0032] The brake 22 adopts an existing power-off brake, and further, an electromagnetic power-off brake. The power-off brake comprises a rotating brake disc and a stationary brake disc. The rotating brake disc is coaxially sleeved on the driving shaft 52, that is, the rotating brake disc rotates with the driving shaft 52. The brake is externally connected to a half-wave rectifier, which rectifies single-phase alternating current into direct current. After power-on, the winding generates a magnetic field, which attracts the armature as the stationary brake disc and compresses the spring fixed in the iron core. When power-off, the winding is discharged, the spring pushes the armature out, and the stationary brake disc is pushed to and pressed against the rotating brake disc, so that the rotating brake disc stops rotating, and braking is realized.

[0033] As a preferred embodiment, as shown in Fig. 3 The driving motor 21 is located in the inner ring of one driving tire 51 and connected to the radiation part 512 of the driving tire 51, and the brake 22 is located in the inner ring of the other driving tire 51, so that the arrangement can be further optimized and the arrangement space can be saved.

[0034] In this embodiment, the limiting unit is provided with four groups, and the four groups of limiting units are symmetrically arranged on both sides of the connecting part 13. The two groups of limiting units on each side of the connecting part 13 are respectively located on both sides of one driving tire 51, and each group of limiting units is connected to the driving shaft 52 through one group of force applying units 4.

[0035] The limiting unit is located between the upper wing plate 11 and the lower wing plate 12, and is attached to the connecting part 13 and the upper wing plate 11.

[0036] The limiting unit comprises a limiting shaft 33, at least one lower limiting stabilizing wheel 32 and at least one lateral limiting stabilizing wheel 31. In this embodiment, each set of limiting units is provided with two lower limiting stabilizing wheels 32 and one lateral limiting stabilizing wheel 31. The two lower limiting stabilizing wheels 32 are connected to the limiting shaft 33 through a bearing sleeve, and the lower limiting stabilizing wheels 32 roll against the upper wing plate 11.

[0037] The lateral limiting stabilizing wheel 31 is rotatably mounted at one end of the limiting shaft 33, and rolls against the connecting part 13. That is, the central axis of the lateral limiting stabilizing wheel 31 is perpendicular to the central axis of the lower limiting stabilizing wheel 32. The other end of the limiting shaft 33 extends beyond the width of the upper wing plate 11 and is connected to the driving shaft 52 through a set of force applying units 4. Obviously, the limiting shaft 33 and the driving shaft 52 are parallel.

[0038] In this embodiment, two force applying frames 6 are provided. The force applying units 4 are connected to the driving shaft 52 through the force applying frames 6, and specifically, the force applying frames 6 are used to connect the driving shaft 52 and the limiting shaft 33. Each end of the driving shaft 52 is connected to one force applying frame 6, the middle part of the force applying frame 6 is mounted on the driving shaft 52 through a bearing, and each end of the force applying frame 6 is connected to one force applying unit 4. That is, the driving tire 51 and the force applying frame 6 are sleeved on the driving shaft 52, and the two driving tires 51 are located between the two force applying frames 6.

[0039] The force applying unit 4 comprises a force applying seat 41, at least one elastic component 44 and at least one set of force applying assemblies. The force applying seat 41 is sleeved on the limiting shaft 33, the two ends of the force applying assembly are connected to the force applying seat 41 and one end of the force applying frame 6 respectively, and the elastic component 44 is located at the connection between the force applying seat 41 and the force applying assembly and / or the connection between the force applying frame 6 and the force applying assembly.

[0040] In the embodiment, each force applying unit 4 is provided with two groups of force applying assemblies, i.e., a first force applying assembly 42 and a second force applying assembly 43. The force applying seat 41 comprises a connecting plate in direct connection with the force applying assemblies. The first force applying assembly 42 comprises a first screw rod 421, a first locking nut 422 and a first adjusting nut 423, and the second force applying assembly 43 comprises a second screw rod 431 and a second locking nut 432. The first screw rod 421 and the second screw rod 431 are arranged in parallel and at intervals, the first screw rod 421 passes through one end of the force applying frame 6 and the connecting plate of the force applying seat 41 in sequence and is locked by the first locking nut 422, the first screw rod 421 is further provided with the first adjusting nut 423, and the first adjusting nut 423 is located between the force applying frame 6 and the force applying seat 41. In order to realize buffering and more stable stress, the first screw rod 421 is further provided with a plurality of elastic components 44, specifically, the elastic components 44 are arranged between the head of the first screw rod 421 and the force applying frame 6, between the first locking nut 422 and the force applying seat 41, between the first adjusting nut 423 and the force applying seat 41, etc.

[0041] Preferably, the elastic components 44 are springs.

[0042] The structure of the second force applying assembly 43 is similar to that of the first force applying assembly 42, the second screw rod 431 passes through the force applying frame 6 and the connecting plate of the force applying seat 41 in sequence and is locked by the second locking nut 432. The head of the second screw rod 431 and the force applying frame 6 are both provided with the elastic components 44, and the second locking nut 432 and the force applying seat 41 are both provided with the elastic components 44. Preferably, the second force applying assembly 43 is closer to the driving tire 51 than the first force applying assembly 42.

[0043] Based on the above structure, by adjusting the locking nuts of the force applying units 4, pressure can be applied to the limiting shafts 33 and the force applying frames 6 at both ends, the force applying frames 6 apply pressure to the driving shaft 52, so that the force applying units 4 tightly press the driving tire 51 on the upper wing plate 11, and the limiting shafts 33 are stably supported, at this time, the limiting shafts 33 can be regarded as a cantilever beam, the lower limiting and stabilizing wheel 32 is tightly pressed on the upper wing plate 11 by the limiting shafts 33, and the lateral limiting and stabilizing wheel 31 is tightly pressed on the connecting part 13. The four groups of force applying units 4 are respectively located at the four corners of a rectangle, and the driving tire 51 is located in the middle of the rectangle, which further improves the stability and balance of the tight pressing of the force applying units 4 on the driving tire 51, the lateral limiting and stabilizing wheel 31 and the lower limiting and stabilizing wheel 32.

[0044] At the same time, the driving device is stressed more smoothly through the buffering of the elastic component 44. The driving tire 51 can stably adhere to the upper wing plate 11 to rotate by the friction between the driving tire 51 and the upper wing plate 11. Similarly, the lateral limiting and stabilizing wheel 31 and the lower limiting and stabilizing wheel 32 adhere to the connecting part 13 and the upper wing plate 11 to roll by the friction between the lateral limiting and stabilizing wheel 31 and the lower limiting and stabilizing wheel 32 and the track 1, respectively, so as to guide and limit the driving device, and make the driving device run along the length direction of the track 1. At the same time, the outer diameter required by the lateral limiting and stabilizing wheel 31 and the lower limiting and stabilizing wheel 32 is obviously smaller than the outer diameter of the driving tire 51, so compared with placing the driving tire 51 between the upper wing plate 11 and the lower wing plate 12, the technical scheme can reduce the distance between the upper wing plate 11 and the lower wing plate 12 (the height of the track 1), save the arrangement space, reduce the required shaft space, and then reduce the construction cost.

[0045] Finally, it is necessary to point out that: the above examples are only used to further illustrate the technical scheme of the present application, and cannot be understood as a limitation on the protection scope of the present application. Some non-essential improvements and adjustments made by the person skilled in the art according to the above content of the present application all belong to the protection scope of the present application.

Claims

1. Drive arrangement of a traction-free elevator, the elevator being traction-free, the drive arrangement driving a car along a track (1), characterized in that The track (1) has a cross section of an I-shaped section, and comprises an upper flange (11), a lower flange (12) and a connecting portion (13), two ends of the connecting portion (13) are connected to the middle of the upper flange (11) and the middle of the lower flange (12) respectively; The driving device comprises an execution unit, a power unit, a limiting unit and a force applying unit (4); The execution unit comprises a driving shaft (52) and two driving tires (51), the two driving tires (51) are coaxially sleeved on the driving shaft (52), and the two driving tires (51) are arranged in parallel and at intervals; Each group of the force applying unit (4) is connected to two ends of the execution unit driving shaft (52), and contacts the opposite side of the upper flange (11) of the track (1) and the execution unit, and tightly presses the driving tire (51) on one side of the upper flange (11) away from the connecting portion (13); Each group of the force applying unit (4) is also connected to the limiting unit and tightly presses the limiting unit on the connecting portion (13) of the track (1), so as to guide the driving device to run only along the length direction of the track (1); The power unit is connected to and drives the driving tire (51) to rotate in close contact with the upper flange (11).

2. The drive apparatus according to claim 1, characterized by: The limiting unit is located between the upper flange (11) and the lower flange (12), and the limiting unit is symmetrically in close contact with the two side surfaces of the connecting portion (13).

3. The drive apparatus according to claim 2, characterized by: The limiting unit is also in close contact with the upper flange (11).

4. The drive apparatus according to claim 1, characterized by: The power unit comprises a driving motor (21), and the driving motor (21) is connected to and drives the driving tire (51) to rotate.

5. The drive apparatus according to claim 1, characterized by: The limiting unit is provided with four groups, and the four groups of limiting units are arranged on the two sides of the connecting portion (13), the two groups of limiting units on each side of the connecting portion (13) are located on the two sides of the driving tire (51), and each group of limiting units is connected through a group of force applying units (4) and the driving shaft (52).

6. The drive apparatus according to claim 5, characterized by: The limiting unit comprises a limiting shaft (33) and at least one lower limiting stabilizing wheel (32), the lower limiting stabilizing wheel (32) is sleeved on the limiting shaft (33) through a bearing, the lower limiting stabilizing wheel (32) rolls in close contact with the upper flange (11), and one end of the limiting shaft (33) is connected to the driving shaft (52) through a group of force applying units (4).

7. The drive apparatus according to claim 6, characterized by: The limiting unit further comprises a lateral limiting stabilizing wheel (31), the lateral limiting stabilizing wheel (31) is rotatably installed at one end of the limiting shaft (33), and the lateral limiting stabilizing wheel (31) rolls in close contact with the connecting portion (13).

8. Drive arrangement according to claim 6 or 7, characterized in that: The force applying unit (4) is connected to the driving shaft (52) through a force applying frame (6), and the two ends of the driving shaft (52) are respectively connected to one force applying frame (6), the middle of the force applying frame (6) is installed on the driving shaft (52) through a bearing, and the two ends of the force applying frame (6) are respectively connected to one force applying unit (4).

9. The drive apparatus according to claim 8, characterized by: The force applying unit (4) comprises a force applying seat (41), at least one elastic component (44) and at least one group of force applying assemblies, the force applying seat (41) is sleeved on the limiting shaft (33), the two ends of the force applying assembly are respectively connected to the force applying seat (41) and one end of the force applying frame (6), and the elastic component (44) is located at the connection between the force applying seat (41) and the force applying assembly and / or the connection between the force applying frame (6) and the force applying assembly.

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