Hauling machine and elevator

Abstract

The application relates to a traction machine and an elevator, the traction machine comprising a traction machine body and a brake, the traction machine body comprising a machine shell, a stator, a rotor, a rotating shaft and a traction wheel, the stator being installed in the machine shell and electromagnetically coupled with the rotor, the rotating shaft penetrating through the rotor and matched with a rotor key groove, and the traction wheel being installed on one end of the rotating shaft extending out of the rotor; the brake being installed on the machine shell and rotationally connected with the rotating shaft, the brake comprising a moving plate, the moving plate being arranged in the axial direction of the rotor, the moving plate being independently arranged relative to the rotating shaft, and the brake being capable of stopping the rotor by pressing the rotor through the moving plate. In this way, on one hand, the response time of the traction machine during braking can be shortened, and the braking reliability can be improved; on the other hand, the moving plate can play the role of a brake disc, so that the axial size of the whole traction machine can be reduced, the miniaturization requirement of the traction machine can be met, and the manufacturing cost of the traction machine can be reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of elevator power equipment, and in particular relates to a traction machine and an elevator. Background Technology

[0002] Currently, existing elevator traction machines, such as the one with patent publication number CN222348459U, use brake discs mounted on the main shaft via meshing internal and external gears. Braking is achieved by the armature applying a relative force to the brake disc under the action of a spring. However, during braking, the brake discs indirectly transmit the braking force to the rotor through the main shaft, resulting in a delayed braking response and reduced braking efficiency. Furthermore, long-term wear between the brake disc and the main shaft increases transmission clearance, reduces braking reliability, and poses safety hazards. Utility Model Content

[0003] In view of this, it is necessary to provide a traction machine and elevator with a compact structure and fast braking response.

[0004] A traction machine, the traction machine comprising:

[0005] The main body of the traction machine includes a housing, a stator, a rotor, a shaft, and a traction sheave. The stator is installed inside the housing and is electromagnetically coupled to the rotor. The shaft passes through the rotor and is fitted with the rotor keyway. The traction sheave is installed on the shaft and extends out of the rotor.

[0006] A brake is mounted on the housing and rotatably connected to the rotating shaft. The brake includes a movable plate disposed on the rotor in the axial direction of the rotor. The movable plate is independently disposed relative to the rotating shaft, and the brake can stop the rotor by pressing against and limiting the radial end face of the rotor through the movable plate.

[0007] It is understandable that the braking of the traction machine is achieved by directly pressing the moving plate against the limiting rotor, so that the traction machine does not need to transmit power through the shaft when braking. This can shorten the response time of the traction machine when braking and improve braking reliability. On the other hand, the moving plate can act as a brake disc. This not only helps to reduce the axial dimension of the traction machine and meet the requirements of miniaturization, but also reduces the manufacturing cost of the traction machine, making it suitable for applications in compact spaces or low-cost scenarios.

[0008] In one embodiment, the moving plate has a contact surface that abuts against the radial end face of the rotor in the direction of the rotor, and the axial projection of the contact surface covers the radial end face of the rotor.

[0009] In one embodiment, the movable plate protrudes in the direction of the rotor and forms a boss, and the movable plate presses against and limits the rotor through the boss.

[0010] Understandably, the moving plate uses a protruding boss to directly press against the limiting rotor. This can shorten the travel of the moving plate when braking the rotor, and further reduce the response time of the traction mechanism by reducing the displacement distance of the moving plate during braking. On the other hand, it can also allow the main body size of the moving plate to be designed independently, which can ensure sufficient electromagnetic braking torque requirements and avoid the disadvantage of the moving plate affecting the electromagnetic braking performance due to size limitations.

[0011] In one embodiment, a first friction surface is formed on the rotor, and the rotor is limited to abutting against the moving plate through the first friction surface;

[0012] And / or, a second friction surface is formed on the moving plate, and the moving plate abuts and limits the rotor through the second friction surface.

[0013] It is understandable that the rotor and the moving plate are in contact with a friction surface. This increases the coefficient of friction between the two when the moving plate presses against the limiting rotor, allowing the moving plate to generate a larger braking friction torque when pressing against the limiting rotor, thereby ensuring the stability of the traction mechanism's braking operation.

[0014] In one embodiment, the brake further includes a stationary plate and an induction coil, the stationary plate abutting against and connected to the housing, and the stationary plate and the rotating shaft being rotatably connected by a bearing;

[0015] The induction coil is mounted on the stationary plate, and when the induction coil is energized or de-energized, it drives the moving plate to reciprocate relative to the rotor by attracting or releasing the moving plate, and controls the rotation / stopping of the rotor.

[0016] Understandably, by directly mounting the stationary plate onto the housing and bearing the rotating shaft, the stationary plate simultaneously serves the dual functions of shaft support and electromagnetic braking. This not only reduces the overall axial dimension of the traction machine and meets the miniaturization requirements of the traction machine, but also lowers the manufacturing cost of the traction machine, making it suitable for applications in compact spaces or low-cost scenarios.

[0017] In one embodiment, the brake further includes an elastic element that is pre-compressed and positioned between the moving plate and the stationary plate;

[0018] The number of elastic elements is set to multiple, and the multiple elastic elements are arranged symmetrically with respect to the center line of the rotating shaft.

[0019] In one embodiment, one end of the elastic element is housed within the stationary plate;

[0020] And / or, the other end of the elastic element is housed within the moving plate.

[0021] It is understandable that by embedding the two ends of the elastic element into the stationary plate and / or the moving plate respectively, the assembly of the elastic element between the stationary plate and the moving plate can be limited and the assembly of the elastic element can be facilitated. On the other hand, it can also reduce the space required for the elastic element in the axial direction of the traction machine during assembly and meet the miniaturization requirements of the traction machine.

[0022] In one embodiment, the stationary plate has a central through hole;

[0023] The traction machine also includes an encoder, which is at least partially housed within the central through hole and engages with the rotating shaft.

[0024] In one embodiment, the number of brakes is set to two, the two brakes are disposed at both axial ends of the rotor, and the two brakes press against and limit the radial end faces on both sides of the rotor through their respective moving plates.

[0025] It is understandable that using two brakes to stop the rotor simultaneously can improve the stability of the traction mechanism during braking and meet the assembly requirements when the rotor and the keyway of the shaft are fitted together.

[0026] In one embodiment, both stationary plates are provided with partitions that enclose a receiving cavity, and each receiving cavity is provided to house one of the bearings.

[0027] In each of the brakes, the moving plate is disposed around the periphery of the corresponding stationary plate's partition portion.

[0028] This application also provides an elevator, including the traction machine described above.

[0029] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0030] The traction machine and elevator claimed in this application use a moving plate to directly press against the limiting rotor to achieve braking of the traction machine. This eliminates the need for power transmission through the shaft when the traction machine is braking. On the one hand, this shortens the response time of the traction machine and improves braking reliability. On the other hand, the moving plate can act as a brake disc. This not only helps to reduce the axial dimension of the traction machine and meet the requirements for miniaturization, but also reduces the manufacturing cost of the traction machine, making it suitable for applications in compact spaces or low-cost scenarios. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the traction machine provided in this application.

[0033] Figure 2 for Figure 1 Enlarged view of the middle P section.

[0034] Figure 3 for Figure 1 Enlarged view of the middle Q section.

[0035] Reference numerals: 100, traction machine; 10, traction machine body; 11, housing; 12, stator; 13, rotor; 131, first friction surface; 14, shaft; 15, traction sheave; 16, protective cover; 20, brake; 21, moving plate; 210, contact surface; 211, boss; 22, stationary plate; 221, partition; 2211, accommodating cavity; 222, central through hole; 23, induction coil; 24, elastic element; 30, encoder; 101, bearing; 201, bolt. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] like Figure 1 , Figure 2 As shown, the traction machine 100 provided in this application includes a traction machine body 10 and a brake 20. The traction machine body 10 includes a housing 11, a stator 12, a rotor 13, a rotating shaft 14, and a traction sheave 15. The stator 12 is installed inside the housing 11 and is electromagnetically coupled to the rotor 13. The rotating shaft 14 passes through the rotor 13 and is engaged with the rotor 13 via a keyway. The traction sheave 15 is installed on the rotating shaft 14 at one end extending out of the rotor 13. The brake 20 is installed on the housing 11 and is rotatably connected to the rotating shaft 14. The brake 20 includes a movable plate 21, which is disposed on the rotor 13 in the axial direction of the rotor 13. The movable plate 21 is independently disposed relative to the rotating shaft 14, and the brake 20 can press against and limit the rotor 13 through the movable plate 21 to stop the rotor 13.

[0040] As can be seen from the above, the traction machine 100 of this application uses the moving plate 21 to directly press against the limiting rotor 13 to achieve braking, so that the traction machine 100 does not need to transmit power through the rotating shaft 14 when braking. This can shorten the response time of the traction machine 100 when braking and improve the braking reliability. On the other hand, the moving plate 21 can also act as a brake disc, but saves the brake disc and the connecting parts between the brake disc and the rotating shaft. This not only helps to reduce the axial dimension of the traction machine 100 and meet the miniaturization requirements of the traction machine 100, but also reduces the manufacturing cost of the traction machine 100, making the traction machine 100 suitable for application in compact space or low-cost scenarios.

[0041] In this application, the traction machine 100 has a movable plate 21 with a contact surface 210 facing the rotor 13, which abuts against the radial end face of the rotor 13. The axial projection of the contact surface 210 covers the radial end face of the rotor 13. That is, the movable plate 21 can contact the radial end face of the rotor 13 through the contact surface 210 to achieve the purpose of stopping the rotor 13. Moreover, the area of ​​the contact surface 210 on the movable plate 21 is not less than the area of ​​the radial end face of the rotor 13, so that the movable plate 21 can completely contact the radial end face of the rotor 13.

[0042] like Figure 1 As shown, in one embodiment, the traction machine body 10 further includes a protective cover 16, which is mounted on the housing 11 and is used to house the traction sheave 15.

[0043] like Figure 2 As shown, in one embodiment, a first friction surface 131 is formed on the rotor 13, and the rotor 13 abuts against and limits the moving plate 21 through the first friction surface 131; and / or, a second friction surface is formed on the moving plate 21 (preferably, the contact surface 210 of the moving plate 21 is the second friction surface), and the moving plate 21 abuts against and limits the rotor 13 through the second friction surface. That is to say, in this embodiment, the rotor 13 and the moving plate 21 are in contact through a friction surface, which can increase the coefficient of friction between the two when the moving plate 21 presses against and limits the rotor 13, so that the moving plate 21 can generate a larger braking friction torque when pressing against and limiting the rotor 13, thereby ensuring the stability of the braking operation of the traction machine 100. Here, a first friction surface 131 can be provided on the rotor 13, wherein the specific shape of the first friction surface 131 on the rotor 13 can be specifically set according to the usage requirements; or, a second friction surface can be provided on the contact surface 210 of the moving plate 21; in addition, a first friction surface can be provided on the rotor 13 and a second friction surface can be provided on the moving plate 21 at the same time; the specifics will not be elaborated here.

[0044] like Figure 1 As shown, in one embodiment, the number of brakes 20 is set to two, with the two brakes 20 disposed at both axial ends of the rotor 13. Furthermore, the two brakes 20 can respectively press against the radial end faces on both sides of the rotor 13 via their respective moving plates 21. That is, the traction machine 100 of this embodiment can simultaneously stop the rotor 13 using two brakes 20, thereby improving the stability of the traction machine 100 during braking and meeting the assembly requirements when the rotor 13 and the keyway of the shaft 14 are fitted. It is understood that in other embodiments, the number of brakes 20 may also be one.

[0045] like Figure 2 As shown, in one embodiment, the movable plate 21 protrudes towards the rotor 13 and forms a boss 211. The movable plate 21 presses against and limits the rotor 13 through the boss 211. This can shorten the travel of the movable plate 21 when braking the rotor 13, and further reduce the response time of the traction machine 100 when braking by reducing the displacement distance of the movable plate 21 during braking. On the other hand, it can also allow the main body size of the movable plate 21 to be designed independently, which can ensure sufficient electromagnetic braking torque requirements and avoid the disadvantage of the movable plate affecting the electromagnetic braking performance due to size limitations.

[0046] like Figure 1As shown, in one embodiment, the brake 20 further includes a stationary plate 22 and an induction coil 23. The stationary plate 22 abuts against and is connected to the housing 11. Specifically, bolts 201 arranged circumferentially and threaded through the stationary plate 22 and connected to the housing 11 are used to achieve the assembly connection between the stationary plate 22 and the housing 11. Furthermore, the stationary plate 22 is rotatably connected to the rotating shaft 14 through a bearing 101. The stationary plate 22 also has a bearing cavity, serving as a bearing seat. In other words, in this embodiment, the stationary plate 22 is directly mounted on the housing 11 and carries the rotating shaft 14, so that the stationary plate 22 has the dual functions of supporting the rotating shaft 14 and providing electromagnetic braking. This not only reduces the axial dimension of the traction machine 100 and meets the miniaturization requirements of the traction machine 100, but also reduces the manufacturing cost of the traction machine 100, making the traction machine 100 suitable for applications in compact spaces or low-cost scenarios.

[0047] like Figure 3 As shown, each of the two stationary plates 22 has a partition 221, which encloses a receiving cavity 2211. Each receiving cavity 2211 houses a bearing 101, and is thus a bearing cavity. Furthermore, in each brake 20, the moving plate 21 is positioned around the partition 221 on the corresponding stationary plate 22. In other words, in this traction machine 100, the two bearings 101 share the force and enable the two stationary plates 22 to rotate on the shaft 14.

[0048] like Figure 1 , Figure 2 As shown, in this embodiment, the induction coil 23 is mounted on the stationary plate 22. Specifically, the induction coil 23 can be embedded in the stationary plate 22. When the induction coil 23 is energized or de-energized, it drives the moving plate 21 to reciprocate relative to the rotor 13 by attracting or releasing the moving plate 21. The rotation / stop of the rotor 13 is controlled by moving away from or abutting the radial end face of the rotor 13.

[0049] like Figure 1 , Figure 2 As shown, in one embodiment, the brake 20 further includes an elastic element 24, which is pre-compressed and positioned between the moving plate 21 and the stationary plate 22. This allows the moving plate 21 to generate a magnetic field after the induction coil 23 is energized, causing the stationary plate 22 to exert a pulling force on the moving plate 21, which in turn compresses the elastic element 24 and pushes it against the stationary plate 22. This causes the moving plate 21 to move away from the rotor 13, allowing the rotor 13 to drive the traction wheel 15 to rotate via the shaft 14. When the induction coil 23 is de-energized, the moving plate 21 loses the pulling force of the stationary plate 22, and under the elastic push of the elastic element 24, the moving plate 21 abuts against the radial end face of the limiting rotor 13 to stop the rotor 13.

[0050] In this embodiment, multiple elastic elements 24 are provided, and these multiple elastic elements 24 are symmetrically arranged with respect to the center line of the rotating shaft 14. This allows the moving plate 21 to translate towards the rotor 13 under the combined pushing force of the multiple elastic elements 24, thereby improving the stability of the moving plate 21 when braking the rotor 13. Here, the number of elastic elements 24 can be two, three, or even more. Specifically, the elastic elements 24 can be configured as compression springs, highly elastic rubber sleeves, etc.

[0051] like Figure 1 , Figure 2 As shown, in this embodiment, one end of the elastic element 24 is housed in the stationary plate 22; and / or, the other end of the elastic element 24 is housed in the moving plate 21. This serves to limit the assembly of the elastic element 24 between the stationary plate 22 and the moving plate 21, and facilitates the assembly of the elastic element 24. On the other hand, it also reduces the space required for the elastic element 24 to be assembled in the axial direction of the traction machine 100, and meets the miniaturization requirements of the traction machine 100.

[0052] Furthermore, the two ends of the elastic element 24 are respectively housed within the stationary plate 22 and the movable plate 21. It is understood that in other embodiments, the elastic element 24 may also be housed only within the stationary plate 22 or the movable plate 21, which will not be elaborated here.

[0053] like Figure 1 As shown, in one embodiment, the traction machine 100 includes an encoder 30, which is at least partially housed within a central through hole 222 in the stationary plate 22 and cooperates with the rotating shaft 14, enabling the traction machine 100 to monitor its operating status using the encoder 30. It should be noted that the specific structure of the encoder 30 and its working principle for detecting the operating status of the traction machine can all adopt existing conventional methods, and will not be elaborated upon here.

[0054] In addition, this application also provides an elevator, including the traction machine 100 described above.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A traction machine, characterized in that, The traction machine (100) includes: The main body (10) of the traction machine includes a housing (11), a stator (12), a rotor (13), a shaft (14), and a traction sheave (15). The stator (12) is installed inside the housing (11) and is electromagnetically coupled to the rotor (13). The shaft (14) passes through the rotor (13) and is engaged with the keyway of the rotor (13). The traction sheave (15) is installed on the shaft (14) at one end that extends out of the rotor (13). A brake (20) is mounted on the housing (11) and rotatably connected to the rotating shaft (14). The brake (20) includes a movable plate (21), which is disposed on the rotor (13) in the axial direction of the rotor (13). The movable plate (21) is independently disposed relative to the rotating shaft (14), and the brake (20) can stop the rotor (13) by pressing against and limiting the radial end face of the rotor (13) through the movable plate (21).

2. The traction machine according to claim 1, characterized in that, The moving plate (21) has a contact surface (210) that abuts against the radial end face of the rotor (13) in the direction of the rotor (13), and the axial projection of the contact surface (210) covers the radial end face of the rotor (13).

3. The traction machine according to claim 1, characterized in that, The moving plate (21) protrudes in the direction of the rotor (13) and forms a boss (211), and the moving plate (21) presses against and limits the rotor (13) through the boss (211).

4. The traction machine according to claim 1, characterized in that, A first friction surface (131) is formed on the rotor (13), and the rotor (13) is abutted and limited by the first friction surface (131) to the moving plate (21); And / or, a second friction surface is formed on the moving plate (21), and the moving plate (21) abuts against and limits the rotor (13) through the second friction surface.

5. The traction machine according to claim 1, characterized in that, The brake (20) also includes a stationary plate (22) and an induction coil (23). The stationary plate (22) abuts against the housing (11) and is connected to the housing (11). The stationary plate (22) and the rotating shaft (14) are rotatably connected by a bearing (101). The induction coil (23) is mounted on the stationary plate (22), and when the induction coil (23) is energized or de-energized, it drives the moving plate (21) to reciprocate relative to the rotor (13) by attracting or releasing the moving plate (21), and controls the rotation / stop of the rotor (13).

6. The traction machine according to claim 5, characterized in that, The brake (20) also includes an elastic element (24), which is installed in a pre-compressed manner between the moving plate (21) and the stationary plate (22); The number of elastic elements (24) is set to multiple, and the multiple elastic elements (24) are arranged symmetrically with respect to the center line of the rotating shaft (14).

7. The traction machine according to claim 6, characterized in that, One end of the elastic element (24) is housed within the stationary plate (22); And / or, the other end of the elastic element (24) is housed within the moving plate (21).

8. The traction machine according to claim 5, characterized in that, The stationary plate (22) has a central through hole (222); The traction machine (100) also includes an encoder (30), which is at least partially housed within the central through hole (222) and engages with the rotating shaft (14).

9. The traction machine according to claim 5, characterized in that, The number of brakes (20) is set to two. The two brakes (20) are located at both ends of the axial direction of the rotor (13). The two brakes (20) press against and limit the radial end faces on both sides of the rotor (13) through their respective moving plates (21).

10. The traction machine according to claim 9, characterized in that, Both of the stationary plates (22) have a partition (221) formed thereon, the partition (221) enclosing a receiving cavity (2211), and each receiving cavity (2211) is respectively provided to accommodate one of the bearings (101); The moving plate (21) in each brake (20) is disposed around the partition (221) on the corresponding stationary plate (22).

11. An elevator, characterized in that, The traction machine (100) includes any one of claims 1 to 10.

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