Elevator traction machine with double-motor structure

Abstract

The invention discloses an elevator traction machine with a double-motor structure. The elevator traction machine comprises a base, a first motor and a second motor, the first motor comprises a first stator, a first rotor and a first brake, the first brake is installed in the first stator, and the first rotor is rotationally arranged on the first stator and corresponds to the first brake; the second motor comprises a second stator, a second rotor and a second brake, the second brake is installed in the second stator, and the second rotor is rotationally arranged on the second stator and corresponds to the second brake; the first rotor and the second rotor are connected through a plurality of positioning pins. According to the invention, two existing traction machines or two developed traction machines with low load specifications are combined into a new traction machine with high load specifications, so that the production and manufacturing of the traction machine with high load specifications are realized on the premise that a shell mold is not used, the investment in the research and development stage of products is reduced, and meanwhile, the dual-motor structural design is also beneficial to the disassembly and maintenance of a single machine.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator traction machine with a dual-motor structure. Background Art

[0002] With the development of modern manufacturing industry and the large-scale construction of modern industrial parks, heavy-duty freight elevators have been covering a wider range of elevator markets. The specifications of freight elevators have gradually evolved from conventional load-bearing elevators of 2000kg and 3000kg in the early years to heavy-duty elevators of 8000kg and 10000kg, and the elevator speed has also gradually increased to a higher level of 1.0m / s and 1.5m / s.

[0003] As a core safety component of elevators, the traction motor is required to meet the growing demand for freight elevator specifications, resulting in a growing number of traction motor models. Unlike elevator manufacturing, the addition of new traction motor specifications and models requires increased mold investment. Furthermore, with market demands for higher energy efficiency and cost-effectiveness of traction motors, investment in efficient motor design software is essential to improve traction motor efficiency and material utilization.

[0004] At present, the investment in traction machine molds is mainly concentrated in castings and iron core molds. Since the traction machine of a large-load freight elevator has a large ladder shape and there are generally no standard molds available on the market, the cost of developing a new set of traction machine molds is very high. This not only increases the shared cost of a single traction machine, reduces the market competitiveness of the elevator, but also prolongs the product development cycle.

[0005] At present, some manufacturers combine two low-load motors into a high-load motor. The motor winding adopts an axial electrical magnetic field design, and the housing and traction wheel are developed with separate molds. The traction wheel adopts an integrated design. When one of the motors needs to be repaired, the entire traction machine needs to be disassembled, making maintenance extremely difficult.

[0006] Therefore, how to effectively reduce the initial investment of large-load freight elevator traction machines, increase the standardization rate of large-load freight elevator traction machines, reduce their overall costs, and improve the market competitiveness of large-load freight elevators is the research focus of technical personnel in this field.

[0007] In summary, the existing technology has the following problems:

[0008] 1. The motor adopts an axial magnetic field design. Although it can reduce the thickness of a single motor, its manufacturing precision and process requirements are higher than those of the mature radial magnetic field.

[0009] 2. The traction sheave adopts an integrated design. When one of the motors needs to be disassembled for maintenance, the elevator car needs to be lifted and all the wire ropes removed before the entire traction machine can be disassembled. This poses a great safety risk and is difficult to disassemble the entire machine.

[0010] 3. A single motor has only one bearing, the motor is not independent, and the R&D investment is high. Summary of the Invention

[0011] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a dual-motor structure elevator traction machine. By using two existing or developed low-load specification traction machines to combine into a new large-load specification traction machine, the production and manufacturing of large-load specification traction machines can be achieved without investing in shell molds, thereby reducing investment in the product research and development stage. At the same time, the dual-motor structure design is also conducive to the disassembly and maintenance of a single machine, and the difficulty of maintenance is greatly reduced.

[0012] The technical solutions of the present invention are as follows:

[0013] A dual-motor elevator traction machine includes a base and a first motor and a second motor concentrically mounted on the base.

[0014] The first motor includes a first stator, a first rotor, and a first brake, wherein the first brake is installed in the first stator, and the first rotor is rotatably disposed on the first stator and corresponds to the first brake;

[0015] The second motor includes a second stator, a second rotor and a second brake, wherein the second brake is installed in the second stator, and the second rotor is rotatably disposed on the second stator and corresponds to the second brake;

[0016] The first rotor and the second rotor are connected via a plurality of positioning pins.

[0017] Furthermore, the first motor and the second motor are controlled by two separate control systems.

[0018] Furthermore, the first stator includes a first base and a first winding core, the first winding core adopts a radial magnetic field design and is installed on the first base, the first rotor includes a first hub, a first permanent magnet, a first front bearing, a first rear bearing and a first traction wheel, the first hub is rotatably set on the first base, the first permanent magnet is installed on the inner side of the outer periphery of the first hub and corresponds to the first winding core, the inner periphery of the first hub is rotatably connected to the inner side of the first base through the first front bearing and the first rear bearing respectively, the inner end of the first hub is also installed with a first encoder, the first traction wheel is installed on the front side of the first hub, and a plurality of first positioning pin holes are opened on the circumference of the first traction wheel.

[0019] Furthermore, two or more first fixing holes are provided on the bottom of the first base, and the first fixing holes are used to fix the first base to the base through fixing bolts.

[0020] Furthermore, the second stator includes a second base and a second winding core, the second winding core adopts a radial magnetic field design and is installed on the second base, the second rotor includes a second hub, a second permanent magnet, a second front bearing, a second rear bearing and a second traction wheel, the second hub is rotatably set on the second base, the second permanent magnet is installed on the inner side of the outer periphery of the second hub and corresponds to the second winding core, the inner periphery of the second hub is rotatably connected to the inner side of the second base through the second front bearing and the second rear bearing respectively, the inner end of the second hub is also installed with a second encoder, the second traction wheel is installed on the front side of the second hub, and the circumference of the second traction wheel is provided with a plurality of second positioning pin holes corresponding to the first positioning pin holes.

[0021] Furthermore, two or more second fixing holes are provided on the bottom of the second base, and the second base is fixed to the base through fixing bolts through the second fixing holes.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The design of independent single motors on both sides has high material versatility and is easy to disassemble and repair the motors;

[0024] 2. Double-sided 4-bearing design, single motor has higher load capacity and better stability;

[0025] 3. The non-integrated traction sheave design maintains the centrality through special technology and positioning, which is conducive to the removal of the traction sheave on one side while ensuring the safety of the elevator on the other side;

[0026] 4. Adopt radial magnetic field design, with more mature technology, more reliable quality and better operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of a dual-motor elevator traction machine provided by the present invention;

[0029] Figure 2 is a structural schematic diagram of the first motor of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the first stator of the present invention;

[0031] Figure 4 is a schematic structural diagram of the first rotor of the present invention;

[0032] Figure 5 is a structural schematic diagram of the second motor of the present invention;

[0033] Figure 6 is a structural schematic diagram of the second stator of the present invention;

[0034] Figure 7 Schematic diagram of the structure of the second rotor of the present invention.

[0035] Description of reference numerals:

[0036] 1--Base 2--First Motor

[0037] 3--Second motor 4--Fix bolt

[0038] 5--Location pin 21--First stator

[0039] 22--First rotor 23--First brake

[0040] 31--Second stator 32--Second rotor

[0041] 33--Second brake 211--First base

[0042] 212--First winding core 221--First hub

[0043] 222--First permanent magnet 223--First front bearing

[0044] 224--First rear bearing 225--First traction sheave

[0045] 226--First encoder 311--Second base

[0046] 312--Second winding core 321--Second hub

[0047] 322--Second permanent magnet 323--Second front bearing

[0048] 324--Second rear bearing 325--Second traction sheave

[0049] 326--Second encoder 2111--First fixing hole

[0050] 2251--First positioning pin hole 3111--Second fixing hole

[0051] 3251--Second positioning pin hole. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0053] In order to illustrate the technical solution of the present invention, specific embodiments are provided below.

[0054] Example

[0055] See also Figure 1 This embodiment provides a dual-motor elevator traction machine, including a base 1 and a first motor 2 and a second motor 3 concentrically mounted on the base 1.

[0056] Among them, combined Figures 2-4 As shown, the first motor 2 includes a first stator 21, a first rotor 22, and a first brake 23. The first brake 23 is installed in the first stator 21, and the first rotor 22 is rotatably arranged on the first stator 21 and corresponds to the first brake 23. Specifically, the first stator 21 includes a first base 211 and a first winding core 212. The bottom of the first base 211 is provided with two or more first fixing holes 2111. The first fixing holes 2111 are used to fix the first base 211 to the base 1 through fixing bolts 4. The first winding core 212 adopts a radial magnetic field design and is installed on the first base 211. The first rotor 22 includes a first hub 221, a first permanent magnet 222, a first front bearing 223, a first rear bearing 224, and a first traction sheave 225. The first hub 221 is rotatably mounted on the first base 211 , the first permanent magnet 222 is mounted on the inner side of the outer periphery of the first hub 221 and corresponds to the first winding core 212 , the inner periphery of the first hub 221 is rotatably connected to the inner side of the first base 211 via a first front bearing 223 and a first rear bearing 224 , a first encoder 226 is further mounted on the inner end of the first hub 221 , the first traction sheave 225 is mounted on the front side of the first hub 221 , and a plurality of first positioning pin holes 2251 are opened on the circumference of the first traction sheave 225 .

[0057] Among them, combined Figures 5-7As shown, the second motor 3 includes a second stator 31, a second rotor 32, and a second brake 33. The second brake 33 is installed in the second stator 31, and the second rotor 32 is rotatably arranged on the second stator 31 and corresponds to the second brake 33. Specifically, the second stator 31 includes a second base 311 and a second winding core 312. The bottom of the second base 311 is provided with two or more second fixing holes 3111. The second fixing holes 3111 fix the second base 311 to the base 1 through fixing bolts 4. The second winding core 312 adopts a radial magnetic field design and is installed on the second base 311. The second rotor 32 includes a second hub 321, a second permanent magnet 322, a second front bearing 323, a second rear bearing 324, and a second traction wheel 325. The second hub 321 The second permanent magnet 322 is mounted on the inner side of the outer periphery of the second hub 321 and corresponds to the second winding core 312. The inner periphery of the second hub 321 is rotatably connected to the inner side of the second base 311 through the second front bearing 323 and the second rear bearing 324 respectively. A second encoder 326 is also installed at the inner end of the second hub 321. The second traction wheel 325 is mounted on the front side of the second hub 321. A plurality of second positioning pin holes 3251 corresponding to the first positioning pin holes 2251 are opened on the circumference of the second traction wheel 325.

[0058] The first rotor 22 and the second rotor 32 are connected via a plurality of positioning pins 5 .

[0059] The first motor 2 and the second motor 3 are controlled by two separate control systems, ensuring that their traction sheaves rotate synchronously. Because the motors are independent modules, the system can shut down one motor when it detects that the elevator is within the appropriate parameter range, effectively extending its operating life. Furthermore, if one motor fails, only the casing of that motor needs to be disassembled for repair, significantly simplifying maintenance.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-motor elevator traction machine, characterized in that: It comprises a base and a first motor and a second motor which are concentrically mounted on the base; The first motor includes a first stator, a first rotor, and a first brake, wherein the first brake is installed in the first stator, and the first rotor is rotatably disposed on the first stator and corresponds to the first brake; The second motor includes a second stator, a second rotor and a second brake, wherein the second brake is installed in the second stator, and the second rotor is rotatably disposed on the second stator and corresponds to the second brake; The first rotor and the second rotor are connected via a plurality of positioning pins.

2. The dual-motor elevator traction machine according to claim 1, characterized in that: The first motor and the second motor are controlled by two separate control systems.

3. The dual-motor elevator traction machine according to claim 1, characterized in that: The first stator includes a first base and a first winding core. The first winding core adopts a radial magnetic field design and is installed on the first base. The first rotor includes a first hub, a first permanent magnet, a first front bearing, a first rear bearing and a first traction wheel. The first hub is rotatably set on the first base. The first permanent magnet is installed on the inner side of the outer periphery of the first hub and corresponds to the first winding core. The inner periphery of the first hub is rotatably connected to the inner side of the first base through the first front bearing and the first rear bearing respectively. A first encoder is also installed at the inner end of the first hub. The first traction wheel is installed on the front side of the first hub. A plurality of first positioning pin holes are opened on the circumference of the first traction wheel.

4. The dual-motor elevator traction machine according to claim 3, characterized in that: Two or more first fixing holes are provided on the bottom of the first base, and the first base is fixed to the pedestal via fixing bolts through the first fixing holes.

5. The dual-motor elevator traction machine according to claim 3, characterized in that: The second stator includes a second base and a second winding core. The second winding core adopts a radial magnetic field design and is mounted on the second base. The second rotor includes a second hub, a second permanent magnet, a second front bearing, a second rear bearing and a second traction sheave. The second hub is rotatably arranged on the second base. The second permanent magnet is mounted on the inner side of the outer periphery of the second hub and corresponds to the second winding core. The inner periphery of the second hub is rotatably connected to the inner side of the second base through the second front bearing and the second rear bearing respectively. A second encoder is also installed at the inner end of the second hub. The second traction sheave is mounted on the front side of the second hub. A plurality of second positioning pin holes corresponding to the first positioning pin holes are opened on the circumference of the second traction sheave.

6. The dual-motor elevator traction machine according to claim 5, characterized in that: The bottom of the second base is provided with two or more second fixing holes, and the second base is fixed to the base through fixing bolts through the second fixing holes.

Images