Elevator hoisting machine and elevator system

Abstract

The application discloses an elevator traction machine, which comprises a machine base, a rotating shaft assembly arranged in the machine base, the rotating shaft assembly comprising a rotating shaft, a first shaft section of the rotating shaft extending out of the machine base and having a first taper hole at an end thereof, a traction sheave arranged on the first shaft section and located at one side of the machine base, a convex structure arranged on the outer side of the traction sheave and used for mounting a gear of a magnetic ring encoder, an encoder support comprising a first panel, a second panel and a third panel connected in sequence, the first panel, the second panel and the third panel being vertically arranged on the outer side of the traction sheave, the encoder support being provided with a first mounting position and a second mounting position, and a mounting portion arranged on the first panel, the second panel and / or the third panel. The elevator traction machine provided by the application can be provided with at least an optical encoder and a magnetic ring encoder, can be applicable to a machine roomless elevator, and can also be applicable to a common machine room elevator.

Description

Technical Field

[0001] This invention relates to the field of elevator equipment technology, specifically to an elevator traction machine and an elevator system. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] External rotor traction machines are a commonly used type of traction machine. They have a stator mounted on a base with coil windings wound around it. The brake wheel, or rotor, is rotatably mounted on the stator via a shaft, and magnets are installed on the rotor. In use, the coil windings are energized and work with the magnets to drive the brake wheel to rotate. By installing the traction wheel for hanging the ropes onto the brake wheel, the traction wheel can be driven to rotate, thereby raising and lowering the ropes that hang the car to move the car.

[0004] Especially in machine-room-less elevator systems, elevator traction machines with cantilever structures need to be suspended and installed. Due to the limited space, the relative arrangement and close distance between the car guide rails and the traction sheave of the elevator traction machine make it impossible to disassemble the encoder of the elevator traction machine on-site. This causes many inconveniences when the elevator system needs to be inspected and repaired. Summary of the Invention

[0005] The objective of this invention is to at least solve the technical problem of the inability to disassemble the encoder of an elevator traction machine. This objective is achieved through the following technical solution:

[0006] This invention proposes an elevator traction machine, which includes:

[0007] Base,

[0008] A rotating shaft assembly is disposed within the machine base. The rotating shaft assembly includes a rotating shaft, a first shaft section of which extends out of the machine base, and the shaft end of the first shaft section is provided with a first tapered hole.

[0009] The traction sheave is mounted on the first shaft section and located on one side of the machine base. The outer side of the traction sheave is provided with a protruding structure for mounting the gear of the magnetic ring encoder.

[0010] An encoder bracket includes a first panel, a second panel, and a third panel connected in sequence. The first panel, the second panel, and the third panel are all vertically disposed on the outside of the traction sheave. The middle area of ​​the second panel is provided with a first mounting position opposite to the shaft end of the first shaft segment. The first panel and / or the third panel are provided with a second mounting position opposite to the gear. The encoder bracket also includes a mounting part for connecting to the base. The mounting part is disposed on the first panel and / or the second panel and / or the third panel.

[0011] The elevator traction machine provided by the present invention, by setting a first mounting position and a second mounting position, can be equipped with a variety of encoders, including at least photoelectric encoders and magnetic ring encoders. The tapered hole on the first shaft section of the rotating shaft assembly is used to install the photoelectric encoder, and the protruding structure on the traction wheel is used to install the gear of the magnetic ring encoder. The elevator traction machine of the present invention can be applied to machine room-less machines as well as ordinary machine rooms.

[0012] In some embodiments of the elevator traction machine provided by the present invention, the second panel is recessed relative to the first panel and the third panel, wherein the first mounting position is located in the first recess.

[0013] In some embodiments of the elevator traction machine provided by the present invention, the first panel and / or the second panel and / or the third panel are provided with a plurality of first perforated structures for heat dissipation.

[0014] In some embodiments of the elevator traction machine provided by the present invention

[0015] The base has an axially penetrating first mounting cavity, and a first annular groove is provided on the radially outer side of the first mounting cavity. The opening of the first annular groove faces the traction sheave. A first annular wall plate is provided between the first mounting cavity and the first annular mounting groove.

[0016] A second annular groove is provided on the radially outer side of the first annular groove. The opening of the second annular groove is away from the traction sheave. A second annular wall plate is provided between the first annular mounting groove and the second annular mounting groove. The second annular groove is used to set the stator assembly and the rotor assembly. The depth of the second annular groove is consistent with the axial distance between the two end faces of the machine base.

[0017] In some embodiments of the elevator traction machine provided by the present invention, a plurality of first heat dissipation plates are provided in the first annular groove, and the plurality of first heat dissipation plates are spaced apart along the circumferential direction of the central axis of the first annular wall plate.

[0018] The first heat sink extends to the first annular wall plate, the second annular wall plate, and the bottom plate of the first annular groove.

[0019] In some embodiments of the elevator traction machine provided by the present invention, the traction wheel is provided with a first reinforcing rib on the side facing the first annular groove, and the radial outer edge of the first reinforcing rib is approximately aligned with the second annular wall plate.

[0020] The first reinforcing rib is disposed opposite to the first heat dissipation plate so that the airflow generated by the first reinforcing rib when the traction sheave rotates flows toward the first reinforcing rib.

[0021] In some embodiments of the elevator traction machine provided by the present invention, along the axial direction of the traction sheave, at least a portion of the cross-sectional dimensions of the first reinforcing rib gradually increase from the central region of the traction sheave outwards.

[0022] In some embodiments of the elevator traction machine provided by the present invention, the axial section of the first heat sink plate gradually tapers radially along the first annular groove, and the axial section is the section of the first heat sink plate parallel to the axial direction of the traction wheel.

[0023] In some embodiments of the elevator traction machine provided by the present invention, a second hole structure is provided on the bottom surface of the second annular groove, and the second hole structure is used for heat dissipation of the stator assembly and the rotor assembly.

[0024] In some embodiments of the elevator traction machine provided by the present invention, the rotating shaft assembly is disposed in the first mounting cavity. The rotating shaft assembly includes a first bearing member and a second bearing member. The first bearing member is disposed on the side of the first mounting cavity near the traction sheave, and the second bearing member is disposed on the side of the first mounting cavity near the rotor assembly. The rotor assembly is rotatably connected to a portion of the rotating shaft extending out of the first mounting cavity.

[0025] A second aspect of the present invention provides an elevator system comprising: a car and an elevator traction machine connected to the car, wherein the elevator traction machine is an elevator traction machine as described in any of the preceding claims. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 A perspective view of the base of an elevator traction machine according to an embodiment of the present invention is shown schematically.

[0028] Figure 2 A side view of the base of an elevator traction machine according to an embodiment of the present invention is shown schematically.

[0029] Figure 3 A schematic front view of the base of an elevator traction machine according to an embodiment of the present invention is shown.

[0030] Figure 4 for Figure 3 AA section view;

[0031] Figure 5 A schematic front view of the traction sheave of an elevator traction machine according to an embodiment of the present invention is shown.

[0032] Figure 6 Figure 5 BB-direction sectional view;

[0033] Figure 7 A perspective view of an encoder bracket for an elevator traction machine according to an embodiment of the present invention is shown schematically.

[0034] Figure 8 A perspective view of an encoder bracket for an elevator traction machine according to an embodiment of the present invention is shown schematically.

[0035] Figure 9 A perspective view of the gear of the magnetic ring encoder of an elevator traction machine according to an embodiment of the present invention is shown schematically.

[0036] Figure 10 A perspective view of an elevator traction machine according to an embodiment of the present invention is shown schematically;

[0037] Figure 11 A schematic front view of an elevator traction machine according to an embodiment of the present invention is shown;

[0038] Figure 12 for Figure 11 CC-direction sectional view;

[0039] Figure 13 The illustration schematically shows an elevator traction machine according to an embodiment of the present invention installed in a machine-room-less environment, with the car guide rail located at the front of the traction sheave.

[0040] The attached figures are labeled as follows:

[0041] 100 represents the elevator traction machine;

[0042] 200 Base, 210 First mounting cavity, 220 First annular groove, 230 First heat sink, 240 First annular wall plate; 250 Second annular groove, 260 Second hole structure, 270 Second annular wall plate;

[0043] 300 Rotary shaft assembly, 310 Rotary shaft, 311 First shaft section, 312 First tapered hole; 320 First bearing component, 330 Second bearing component;

[0044] 400 traction sheave, 410 first reinforcing rib; 420 gears, 430 car guide rails

[0045] 500 Encoder bracket, 510 First panel, 520 Second panel, 530 Third panel, 540 First mounting position, 550 Second mounting position, 560 Mounting part; 570 First recess, 580 First hole structure. Detailed Implementation

[0046] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0047] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0048] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0049] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0050] See Figure 7 , Figure 8 and Figure 10 The elevator traction machine 100 of the present invention can be equipped with two types of encoders, photoelectric encoders and magnetic ring encoders. An encoder bracket 500 is provided on the outside of the traction sheave 400. The encoder bracket 500 includes a first panel 510, a second panel 520 and a third panel 530, wherein the second panel 520 is located in the middle position and the middle area of ​​the second panel 520 is opposite to the rotating shaft 310. A first mounting position 540 is provided in the middle position of the second panel 520 for mounting the photoelectric encoder. A first tapered hole 312 is provided at the shaft end of the first shaft segment 311 of the rotating shaft 310 for mounting the photoelectric encoder.

[0051] For the magnetic ring encoder, the traction wheel 400 is provided with a protruding structure for mounting the gear of the magnetic ring encoder. On the encoder bracket 500, the second panel 520 is provided with a first panel 510 and a third panel 530 on both sides respectively. The first panel 510 and the third panel 530 can be provided with a second mounting position 550 at the position opposite to the gear teeth for mounting the magnetic ring encoder.

[0052] Therefore, the elevator traction machine 100 provided by the present invention can be equipped with both photoelectric encoders and magnetic ring encoders. The elevator traction machine 100 of the present invention has high applicability and can be used in both ordinary machine rooms and machine room-less installations.

[0053] Existing traction machines typically have the encoder mounted on top of the base. During movement and installation, the machine is usually moved and positioned using lifting rings on the top of the base, which can easily cause the hook to hit and damage the encoder. Another option is a separate bracket assembly at the front of the traction machine. Using a separate component to fix the encoder can easily affect its normal operation when the traction machine is subjected to impact or braking. Yet another option uses a rear-mounted encoder device. Frequent braking can cause base deformation, interfering with the encoder signal and affecting its reliability. In contrast, the elevator traction machine 100 provided by this invention has an encoder bracket 500 at its front end, capable of mounting both photoelectric encoders and magnetic ring encoders.

[0054] For installations in a standard machine room, a cost-effective photoelectric encoder can be used, mounted on the encoder bracket 500. For installations without a machine room, since the elevator car guide rail 430 is suspended and close to the traction sheave 400 of the elevator traction machine 100, a photoelectric encoder cannot be disassembled and maintained on-site. Therefore, the elevator traction machine 100 provided by this invention can be used to install a magnetic ring encoder, mounted on the first panel 510 or the third panel 530 of the encoder bracket 500. Even when the car guide rail 430 is suspended, interference with the car guide rail can be avoided, and disassembly and maintenance can be facilitated. Thus, the elevator traction machine 100 of this invention solves various encoder installation problems by setting the encoder bracket 500 at the front end of the traction sheave 400.

[0055] like Figure 13 As shown, when installing an elevator system without a machine room, the car guide rail 430 passes in front of the traction sheave 400, making it impossible to disassemble and maintain ordinary photoelectric encoders. To adapt to the installation of both machine room-less and machine room elevators, the elevator traction machine 100 provided by this invention has an encoder bracket 500 at its front end, and the shaft end of the rotating shaft 310 has a first conical hole 312 for mounting the encoder, which can be set to a 1:10 conical hole. The traction sheave 400 has a boss structure for mounting a gear 420 for a magnetic ring encoder. When the traction machine is running, it drives the gear 420 or the photoelectric encoder to rotate. Therefore, the encoder bracket 500 in the elevator traction machine 100 provided by this invention can mount both magnetic ring encoders and photoelectric encoders, solving the problem that double-support ultra-thin traction machines cannot mount photoelectric encoders. Furthermore, by setting the encoder bracket 500 at the front end of the elevator traction machine 100, the problem that encoders suspended on the machine room guide rail cannot be disassembled is solved.

[0056] The elevator traction machine 100 provided by the present invention also includes an encoder bracket 500, which is located on the outside of the traction sheave 400. The encoder bracket 500 is provided with a mounting part 560 for connecting to the base 200.

[0057] See Figure 7 and Figure 8 In one embodiment, the second panel 520 of the encoder bracket 500 has a first mounting position 540 corresponding to the first shaft segment 311 of the rotating shaft 310 in the middle area. The first mounting position 540 is used to install the photoelectric encoder of the elevator traction machine 100, and the shaft segment of the first shaft segment 311 of the rotating shaft 310 has a first tapered hole 312, which is used to install the photoelectric encoder.

[0058] See Figure 7 and Figure 8 In one embodiment of the elevator traction machine 100 of the present invention, the encoder bracket 500 has a first panel 510 and a third panel 530 on both sides respectively. The first panel 510 or the third panel 530 is provided with a second mounting position 550. The second mounting position 550 is arranged opposite to the gear teeth. The second mounting hole is used to install the magnetic ring encoder of the elevator traction machine 100. The second mounting position 550 can also be provided on both the first panel 510 and the third panel 530.

[0059] In one embodiment of the elevator traction machine 100 of the present invention, the encoder bracket 500 is provided with a first recess 570, the first recess 570 is formed by the second panel 520 being recessed inward relative to the first panel 510 and the third panel 530, a portion of the first recess 570 is disposed opposite to the end face of the rotating shaft 310, wherein the first mounting position 540 is disposed in the first recess 570.

[0060] In one embodiment of the elevator traction machine 100 of the present invention, the encoder bracket 500 is provided with a plurality of first hole structures 580 for heat dissipation.

[0061] The elevator traction machine 100 of the present invention has a second hole structure 260 on the bottom surface of the second annular groove 250 of the machine base 200. The second hole structure 260 is used for heat dissipation of the stator assembly and rotor assembly in the second annular groove.

[0062] It should be noted that in machine room elevators, devices such as traction machines and speed governors are installed in the machine room. However, in machine roomless elevators, the equipment that was originally installed in the machine room is miniaturized. After eliminating the machine room, devices such as traction machines and speed governors in the machine room are moved to the top or side of the elevator shaft, thus eliminating the traditional machine room.

[0063] It should be noted that encoders are usually required when using elevator traction machines. Among them, photoelectric encoders are sensors that convert the mechanical displacement on the output shaft into pulse digital quantities through photoelectric conversion. They use the principle of grating diffraction to realize the digital transformation of displacement. Photoelectric encoders are composed of grating disks, light-emitting elements, and photosensitive elements. The main functions of photoelectric encoders in elevators are speed measurement, detection of the car's moving distance, and positioning of the magnetic pole angle of permanent magnet synchronous traction machines.

[0064] Combination Figures 1 to 6 In one embodiment of the elevator traction machine 100 of the present invention, the base 200 is provided with a first mounting cavity 210, a first annular groove 220 and a second annular groove 250, wherein the first mounting cavity 210 is axially through, the first annular groove 220 is located radially outside the first mounting cavity 210, the opening of the first annular groove 220 faces the traction sheave 400, and the first annular groove 220 and the first mounting cavity 210 are separated by a first annular wall plate 240.

[0065] The first annular groove 220 has a second annular groove 250 on its radially outer side. The opening of the second annular groove 250 is away from the traction sheave 400. A second annular wall plate 270 is provided between the first annular mounting groove and the second annular mounting groove. The second annular groove 250 is used to set the stator assembly and the rotor assembly. The depth of the second annular groove 250 is consistent with the axial distance between the two end faces of the base 200.

[0066] The elevator traction machine 100 provided by this invention is described in the following reference. Figure 1 and Figure 10 The elevator traction machine 100 includes a base 200, a traction sheave 400, and an encoder bracket 500. The base 200 has an opening on one side, the outer end face of which mates with one side of the traction sheave 400. The encoder bracket 500 is located on the outer side of the traction sheave 400 and is connected to the base 200 via a mounting part 560.

[0067] from Figure 10 As can be clearly seen, the elevator traction machine 100 has a compact overall structure and a short axial distance. As an external rotor traction machine, the short distance from the center line of the traction sheave 400 to the rear end face of the elevator traction machine 100 facilitates the replacement of the traction sheave 400, making it more widely applicable and improving the utilization rate of the elevator shaft. It solves the technical problems of reduced elevator shaft utilization caused by the slender structure of the traction machine and the difficulty of replacing the traction sheave 400 in the machine room.

[0068] Combination Figure 3 and Figure 4The base 200 has a second annular groove 250 on one side for mounting the stator assembly and the rotor assembly. The stator assembly is fixed in the second annular groove 250, and the rotor assembly is sleeved on the outside of the stator assembly to form an external rotor traction machine.

[0069] In one embodiment, the second annular groove 250 is formed by a portion of one side of the base 200 recessed inward. The depth of the second annular groove 250 can be set to be consistent with the axial distance of the base 200. The axial distance of the base 200 refers to the axial distance L between the two end faces of the base 200. The second annular groove 250 is used to set the stator assembly and the rotor assembly sleeved on the stator assembly.

[0070] The elevator traction machine 100 provided by the present invention has a compact axial structure, which is provided in the base 200 with a double support structure, which can not only ensure the stability of the motor drive component, but also effectively reduce the axial distance. Specifically, the base 200 has a first mounting cavity 210 axially located at its center. The first mounting cavity 210 is used to mount the shaft assembly 300 of the elevator traction machine 100. The shaft assembly 300 includes a shaft 310 and a bearing that cooperates with the shaft 310. The traction sheave 400 is mounted on a first shaft section 311 of the shaft 310 extending out of the first mounting cavity 210. A first bearing component 320 is provided on the side of the first mounting cavity 210 near the traction sheave 400. The first bearing component 320 is preferably a self-aligning roller bearing. A second bearing component 330 is provided on the side of the first mounting cavity 210 near the rotor assembly. The second bearing component 330 is preferably a deep groove ball bearing. The rotor assembly is mounted on the shaft section of the shaft 310 extending out of the first mounting cavity 210. Since the self-aligning roller bearing and the deep groove ball bearing are respectively provided on both sides of the first mounting cavity 210, a double support structure supporting the traction sheave 400 and the rotor assembly is formed.

[0071] In the elevator traction machine 100 provided by the present invention, the stator assembly is fixedly connected to the base 200 to fix the stator in the traction machine. The rotor is sleeved on the stator and fixedly installed on the rotating shaft 310 of the elevator traction machine 100. Under the action of the magnetic field of the stator, the rotor can drive the rotating shaft 310 to rotate, so as to drive the bearing assembly and the traction wheel 400 to rotate through the rotating shaft 310.

[0072] The invention of the elevator traction machine 100 provided by this invention also lies in providing a good heat dissipation structure, which can promptly and actively dissipate the large amount of heat generated inside the elevator traction machine 100 to the outside of the base 200. Therefore, the motor drive assembly in the base 200 of the elevator traction machine 100 has a good operating environment, high efficiency, and high energy utilization. The specific structure is as follows:

[0073] like Figure 1As shown, the base 200 has a plurality of first heat dissipation plates 230 arranged circumferentially along the central axis within the first annular groove 220, and the side end faces of the first heat dissipation plates 230 abut against the first annular wall plate 240, the second annular wall plate 270, and the bottom plate of the first annular groove 220; combined Figure 4 The side end face of the first heat sink 230 extends to the second annular groove 250. Therefore, the heat generated by the motor drive component in the second annular groove 250 can be transferred outward to the maximum extent through the first heat sink 230. Multiple first heat sinks 230 are arranged circumferentially on the central axis of the base 200, which can better transfer the heat in the second annular groove 250 outward.

[0074] In one embodiment of the elevator traction machine 100 of the present invention, along the axial direction of the traction sheave 400, at least a portion of the cross-sectional dimensions of the first reinforcing rib 410 gradually increase from the central region of the traction sheave 400 outwards.

[0075] In one embodiment of the elevator traction machine 100 of the present invention, the axial section of the first heat sink 230 gradually tapers along the radial direction of the first annular groove 220, and the axial section is the section of the first heat sink 230 parallel to the axial direction of the traction wheel 400.

[0076] In one embodiment of the elevator traction machine 100 of the present invention, a second hole structure 260 is provided on the bottom surface of the second annular groove 250, and the second hole structure 260 is used for heat dissipation of the stator assembly and the rotor assembly.

[0077] The heat dissipation of existing elevator traction machines mainly relies on the natural heat dissipation of the outer surface of the machine base and brake wheel exposed to the air. Even if ventilation holes are set on the machine base, natural heat dissipation is still insufficient to remove the large amount of heat inside the traction machine in time. The hot air inside the traction machine cannot be actively exhausted to the outside of the machine base shell, resulting in excessively high internal temperature of the traction machine, which in turn leads to increased winding resistance, increased copper loss, lower motor efficiency, and wasted power resources.

[0078] In the elevator traction machine provided by the present invention, a plurality of first heat dissipation plates 230 are provided in the first annular groove 220 of the base 200. The plurality of first heat dissipation plates 230 are spaced apart along the circumferential direction of the central axis of the opening and extend to the wall plate of the first mounting cavity 210. One end face of the traction wheel 400 is engaged with the outer end face of the first annular groove 220. A plurality of first reinforcing ribs 410 are provided on the side of the traction wheel 400 opposite to the first annular groove 220 along the circumferential direction of the central axis. The axial width of the first reinforcing ribs 410 gradually increases from the central region of the traction wheel 400 to the outer edge. The radial outer edge of the first reinforcing ribs 410 is approximately aligned with the second annular wall plate 270.

[0079] See Figure 2The base 200 has a first mounting cavity 210 along the axial direction at the center position for mounting the shaft assembly 300 of the elevator traction machine 100. One end of the first heat sink 230 is connected to the first mounting cavity 210. Preferably, the axial side of the first heat sink 230 is concave from the position of the first annular wall plate 240 to the outer edge of the first annular groove 220.

[0080] Combination Figure 11 and Figure 12 In one embodiment, the axial end face of the first reinforcing rib 410 rotates around the central axis of the traction wheel 400 to form a second rotating surface, and the axial end face of the first heat sink 230 rotates around the central axis of the rotating shaft assembly 300 to form a first rotating surface. The first rotating surface and the second rotating surface have the same curvature at some relative positions, or the first rotating surface and the second rotating surface are partially parallel. The second rotating surface formed by the rotation of the second reinforcing rib can act as a fan to carry away the heat in the first reinforcing rib 410 which is opposite to the second rotating surface.

[0081] In one embodiment, the side end face of the first heat sink 230 extends radially to the second annular wall plate 270 and the first annular wall plate 240. The first heat sink 230 ribs are in axial and radial contact with the wall plate in the first annular groove 220 of the base 200, which can remove more heat generated by the second annular groove 250 and the stator assembly and rotor assembly during operation.

[0082] In one embodiment, a portion of the shaft 310 in the shaft assembly 300 extends out of the first mounting cavity 210, and the traction wheel 400 is connected to the portion of the shaft. The traction wheel 400 has a boss structure on the side opposite to the first annular groove 220, and the boss structure is used to install the gear 420 of the magnetic ring encoder.

[0083] The elevator traction machine provided by the present invention can be equipped with eight L-shaped first reinforcing ribs 410 through the first heat dissipation plate 230 in the base 200 and the first reinforcing rib 410 on the traction wheel 400. The first reinforcing ribs 410 can act as fans to dissipate heat during operation, thus solving the problem of heat dissipation difficulty of such structures.

[0084] The elevator traction machine provided by the present invention has a base 200 with one side being concave and the bottom of the concave shape being conical. The concave shape is provided with 24 irregularly shaped first heat dissipation plates 230. Furthermore, multiple second hole-like structures 260 are provided on one end face of the base 200 to increase the heat dissipation area. Two triangular reinforcing ribs are provided at the bottom of the base 200 to maintain the stability of the base 200.

[0085] In some embodiments of the elevator traction machine provided by the present invention, the stator is integrally formed in the middle of the second annular groove 250 and is concentrically arranged with the circular second annular groove 250. The rotating shaft 310 is vertically formed in the center of the stator. Furthermore, the size of the second annular groove 250 is larger than the outer diameter of the brake wheel. When the brake wheel is sleeved on the connecting end of the rotating shaft 310, it is ensured that the periphery of the brake wheel will not collide with the inner wall of the second annular groove 250, thus avoiding the machine base 200 from interfering with the rotation of the brake wheel. The brake wheel and the rotor are an integral structure.

[0086] In the elevator traction machine 100 provided by the present invention, the advantage of setting the first heat dissipation plate 230 is that it is equivalent to adding a connecting member on the first annular groove 220 of the base 200, which can increase the connection strength and rigidity between the rotating shaft 310 and the stator. When the brake wheel rotates together with the rotating shaft 310, the brake wheel will exert a non-axial impact force on the rotating shaft 310. This impact force may cause the rotating shaft 310 to deform off its axis. The first heat dissipation plate 230 connects the first mounting cavity 210 and the side wall of the first annular groove 220, improves the connection strength between the base 200 and the rotating shaft 310 and the stator, thereby improving the ability of the rotating shaft 310 to resist the above-mentioned impact force, effectively alleviating the deformation tendency of the rotating shaft 310 off its axis, and thus providing better protection for the smooth rotation of the brake wheel.

[0087] Multiple first heat sinks 230 are evenly spaced around the axis of the rotating shaft 310, that is, the multiple first heat sinks 230 are rotationally symmetrical with respect to the axis of the rotating shaft 310, so as to avoid affecting the overall mass balance of the stator and the rotating shaft 310 due to the setting of the heat sinks, and to avoid the mass imbalance of the stator or the rotating shaft 310 due to the setting of the heat sinks.

[0088] It should be noted that in existing traction machines, the brake disc and traction sheave are cast as a single unit and mounted together on the shaft. Another type involves fixing the brake disc to the traction sheave with screws, with the traction sheave mounted on the shaft. Both of these brake disc structures present difficulties in replacing the traction sheave. During operation, emergency braking of the brake disc using the brakes mounted on the traction machine body causes the machine base to experience significant stress and deformation, posing a safety hazard. Furthermore, since the traction machine operates with an internal drive unit, emergency braking results in high surface temperatures on the deformed traction machine base, severely impacting the efficiency of the internal system. In contrast, the elevator traction machine 100 provided by this invention incorporates multiple heat dissipation plates within the base 200, acting as reinforcing ribs and improving the overall rigidity of the base 200. Even during braking, the deformation of the base 200 is minimal.

[0089] When the traction machine is working, it generates heat inside. The heat dissipation of the traction machine mainly relies on the natural heat dissipation of the outer surface of the base 200 and the brake wheel exposed to the air. Even if ventilation holes are set on the base, natural heat dissipation is still not enough to remove the large amount of heat inside the traction machine in time. The hot air inside the traction machine cannot be actively exhausted to the outside of the base 200 shell, resulting in excessively high internal temperature of the traction machine. This leads to increased winding resistance, increased copper loss, lower motor efficiency, and wasted power resources.

[0090] In some embodiments of the elevator traction machine provided by the present invention, the first heat sink 230 extends radially along the shaft hole, that is, the first heat sink 230 is arranged radially with the center of the shaft hole as the center.

[0091] In some embodiments of the elevator traction machine provided by the present invention, the first heat dissipation plate 230 extends along a direction at a certain angle to the radial direction of the shaft hole. The first heat dissipation plate 230 can be straight or arc-shaped, or it can be provided with heat dissipation ribs of other shapes such as zigzag or wavy lines.

[0092] In some embodiments of the elevator traction machine provided by the present invention, the first mounting cavity 210 protrudes from the end face of the machine base 200 away from the stator assembly and rotor assembly, and the first annular wall plate 240 of the first mounting cavity 210 is provided with a first heat dissipation rib, and the axial side of the first heat dissipation plate 230 forms a recessed structure.

[0093] The first mounting cavity 210 is provided with a bearing mounting hole, which is concentric with and passes through the shaft hole. The bearing mounting hole is used to fit and sleeve the bearing. Specifically, a bearing cap is screwed onto the end face of the connecting end of the rotating shaft 310, and the bearing cap presses the bearing into the bearing mounting hole.

[0094] The elevator traction machine 100 also includes an end cover, which is detachably installed on the end face of the first mounting cavity 210. The end cover covers the bearing mounting hole to prevent external debris from entering the bearing mounting hole and affecting the rotational smoothness of the rotor. Specifically, a screw hole is provided at the end of the first mounting cavity 210, i.e., at the edge of the bearing mounting hole, and the end cover is installed with a fastener through the screw hole.

[0095] The elevator traction machine 100 in this embodiment also includes a rotor end cover, which is located at the rear end of the machine base 200 and is used to protect the rotor. The rotor end cover may have multiple openings for heat dissipation of the motor in operation.

[0096] It should be noted that the elevator's power unit, the traction machine, is used to deliver and transmit power to run the elevator. It mainly includes a motor, brake, coupling, gearbox, traction sheave, guide sheave, and auxiliary handwheel. Generally, these components are mounted on the elevator traction machine's base, which is then mounted on the steel beams of the elevator structure. The elevator traction machine itself has a large mass and significant inertia during operation. When the elevator suddenly brakes, the traction machine's inertia can easily cause deformation of the base, thus reducing the safety and reliability of the equipment during use.

[0097] This invention provides an external rotor double-support traction machine, which includes a rotating shaft 310, a traction sheave 400, and two bearings, namely a front bearing and a rear bearing. The rotating shaft 310 passes through the traction sheave 400, and the front and rear bearings are sleeved at different positions on the rotating shaft 310, located on opposite sides of the traction sheave 400, to support the rotating shaft 310. The front bearing can be a deep groove ball bearing, and the rear bearing can be a self-aligning roller bearing. The front bearing is mounted on the side of the rotating shaft 310 facing the braking assembly of the double-support external rotor traction machine. As the operating time of the external rotor double-support traction machine gradually increases, the front bearing needs to be maintained frequently so that it can be replaced in a timely manner.

[0098] The elevator traction machine provided by the present invention has a compact structure, a short main shaft extension distance, and a reduced overall space occupation. In order to ensure good heat dissipation, the machine base is provided with waist-shaped holes on both sides for heat dissipation.

[0099] The elevator traction machine provided by this invention places the rotor outside the stator to improve heat dissipation and torque. However, in this type of traction machine, the rotor needs to be bent to form a part that interacts with the stator, and this part needs to be offset from the connection with the main shaft towards the stator. In this case, the rotor has a long extension path, a large self-weight, and a large center of gravity offset when the rotor rotates, resulting in poor stability at high speeds. A large amount of kinetic energy is consumed in the rotor's own rotation. To balance the rotor's center of gravity, the rotor is mounted on a portion of the shaft on one side of the rotating shaft 310. The traction sheave 400 is directly mounted on a portion of the shaft at the other end of the rotating shaft 310. This method can balance the center of gravity of the rotor. A bearing assembly is provided on a portion of the shaft between the traction sheave 400 and the rotor, and is installed in the first mounting cavity of the machine base 200. The bearing assembly includes self-aligning roller bearings and deep groove ball bearings. The self-aligning roller bearing is provided on a portion of the shaft closer to the traction sheave 400 to accommodate the load and impact of the traction sheave 400, and the deep groove ball bearing is provided on a portion of the shaft closer to the rotor to accommodate the fixed clearance between the rotor and the stator.

[0100] In elevator systems, external rotor traction machines are currently the most widely used type of traction machine. They drive the rotor to rotate the traction sheave 400 to traction the ropes connected to the car, thereby driving the car to move. Generally, an external rotor traction machine includes a base 200, a stator assembly and a rotor assembly mounted on the base 200, as well as a traction sheave 400 and a brake. The rotor assembly mainly includes a magnet, a rotating shaft 310 and a rotor (i.e., a brake wheel). The stator is wound with coil windings, and the rotating shaft 310 is installed in the shaft hole of the base 200.

[0101] The elevator traction machine 100 of the present invention also includes a brake assembly. Brake mounting platforms are provided on both sides of the machine base 200, and the brake assembly is fixed on the brake mounting platforms for braking.

[0102] Brake wheels are located on both sides of the base 200 and are rotatably mounted on the stator via a rotating shaft 310. Magnets are mounted on the brake wheels, which are also the rotors. When the brake wheels are mounted on the rotating shaft 310, the magnets and winding coils are arranged opposite each other at intervals. The traction sheave 400 is fixedly mounted on the rotating shaft 310 and can rotate synchronously with the rotor or brake wheels. Brakes are mounted on both sides of the base 200 and are used to cooperate with the brake wheels or rotor to brake, so as to control the car's acceleration, deceleration or stopping.

[0103] In use, the coil windings in the stator are energized and work with the magnets to drive the rotor or brake wheel to rotate. The rotation of the rotor or brake wheel drives the traction sheave 400 to rotate, and the traction sheave 400 rotates, and the movement of the car is controlled by the ropes connected to the car.

[0104] The present invention also provides an elevator system, the elevator system including a car and an elevator traction machine 100 as described in any of the preceding claims, wherein the car is connected to the elevator traction machine 100.

[0105] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An elevator hoist machine characterized by, The elevator hoisting machine comprises: a machine base, a rotating shaft assembly arranged in the machine base, the rotating shaft assembly comprising a rotating shaft, a first shaft section of the rotating shaft extending out of the machine base, and a first tapered hole arranged at an axial end of the first shaft section; a traction sheave arranged on the first shaft section and located at one side of the machine base, an outer side of the traction sheave being provided with a protruding structure for mounting a gear of a magnetic ring encoder; an encoder support comprising a first panel, a second panel and a third panel connected in sequence, the first panel, the second panel and the third panel being vertically arranged at the outer side of the traction sheave, wherein a middle region of the second panel is provided with a first mounting position opposite to the axial end of the first shaft section, the first mounting position being used for mounting an optical encoder, the first panel and / or the third panel being provided with a second mounting position opposite to the gear, the second mounting position being used for mounting a magnetic ring encoder, the encoder support further comprising a mounting portion for connecting with the machine base, the mounting portion being arranged on the first panel and / or the second panel and / or the third panel.

2. The elevator hoist machine of claim 1, wherein, The second panel is concave relative to the first panel and the third panel to form a first recess, wherein the first mounting position is arranged in the first recess.

3. The elevator hoist machine of claim 2, wherein, A plurality of first hole structures for heat dissipation are arranged on the first panel and / or the second panel and / or the third panel.

4. The elevator hoisting machine according to any one of claims 1-3, wherein the machine base is provided with an axially-through first mounting cavity, a radially outer side of the first mounting cavity is provided with a first annular groove, an opening of the first annular groove faces the traction sheave, a first annular wall plate is arranged between the first mounting cavity and the first annular mounting groove, a radially outer side of the first annular groove is provided with a second annular groove, an opening of the second annular groove is away from the traction sheave, a second annular wall plate is arranged between the first annular mounting groove and the second annular mounting groove, the second annular groove is used for arranging a stator assembly and a rotor assembly, a depth of the second annular groove is consistent with an axial distance between two side end faces of the machine base.

5. The elevator hoist machine of claim 4, wherein, A plurality of first heat dissipation plates are arranged in the first annular groove, the plurality of first heat dissipation plates are arranged in a circumferential direction of a central axis of the first annular wall plate. The first heat dissipation plates extend to the first annular wall plate, the second annular wall plate and a bottom plate of the first annular groove.

6. The elevator hoist machine of claim 5, wherein, A radially outer side of the first heat dissipation plates is substantially aligned with the second annular wall plate. The first heat dissipation plates are arranged opposite to the first reinforcing ribs, so that air flow generated by the first reinforcing ribs when the traction sheave rotates flows towards the first reinforcing ribs.

7. The elevator hoist machine of claim 6, wherein, At least part of a cross-sectional dimension of the first reinforcing ribs gradually increases from a central region of the traction sheave to the outside along the axial direction of the traction sheave.

8. The elevator hoist machine of claim 7, wherein, An axial cross-section of the first heat dissipation plates gradually tapers along the radial direction of the first annular groove, the axial cross-section being a cross-section of the first heat dissipation plates parallel to the axial direction of the traction sheave.

9. The elevator hoist motor of claim 5, wherein, The bottom surface of the second annular groove is provided with a second hole structure, and the second hole structure is used for heat dissipation of the stator assembly and the rotor assembly.

10. The elevator hoist motor of claim 5, wherein, The rotating shaft assembly is arranged in the first mounting cavity, the rotating shaft assembly comprises a first bearing member and a second bearing member, the first bearing member is arranged on the side of the first mounting cavity close to the traction sheave, the second bearing member is arranged on the side of the first mounting cavity close to the rotor assembly, and the rotor assembly is rotatably connected to the shaft segment of the rotating shaft extending out of the first mounting cavity.

11. An elevator system characterized in that The elevator system comprises: a car and an elevator hoisting machine connected to the car, wherein the elevator hoisting machine is the elevator hoisting machine according to any one of claims 1-10.

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