Traction machine with double motors and assembling method thereof

Abstract

The invention discloses a traction machine with double motors and an assembling method thereof, and belongs to the technical field of traction machines, the traction machine comprises a traction wheel, a main rotating shaft, two supporting bodies and two motor assemblies, the two supporting bodies are arranged at the two ends of the traction wheel respectively, one motor assembly is installed between the first end of the traction wheel and one supporting body, and the other motor assembly is installed between the first end of the traction wheel and the other supporting body. The other motor assembly is installed between the second end of the traction wheel and the other supporting body. The two ends of the main rotating shaft are sleeved with the two supporting bodies correspondingly, and the main rotating shaft is rotationally matched with the supporting bodies. The traction wheel is sleeved outside the main rotating shaft and is fixed with the main rotating shaft; the two supporting bodies are symmetrically arranged relative to the center of the main rotating shaft, and the traction wheels are symmetrically arranged relative to the center of the main rotating shaft. When the traction machine works, acting force borne by the two supporting bodies is consistent, the bearing force borne by the traction machine is more uniform, and dynamic balance of the traction machine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of traction machines, in particular to a traction machine with dual motors and an assembling method thereof. Background Art

[0002] With the development of super-high-rise buildings in China, ultra-high-speed elevators are increasingly used in the domestic market. The traction machines used in current ultra-high-speed elevators are divided into double-support permanent magnet synchronous inner rotor or outer rotor structure types, with inner rotors being the mainstream. The products generally have key technical problems such as large external dimensions, especially large axial dimensions, heavy weight, and complex structure, which requires a large space for the main machine room of the elevator, thereby increasing the construction cost of high-rise buildings and failing to meet the market demand for high-performance, high-efficiency, small size, and lightweight elevator traction machines. Therefore, the development of permanent magnet synchronous traction machines with small external dimensions, especially small axial dimensions, light weight, and simple and compact structure will be more suitable for small machine room application scenarios, and can further enhance the market competitiveness of the products.

[0003] In the prior art, such as axial excitation structure traction machines, two axial excitation structure motors are generally arranged symmetrically on the left and right, with a traction wheel between the two motors. This type of traction machine has a short axial length and is suitable for small machine room applications. During the installation of the axial excitation structure motor, due to the manufacturing precision errors and fitting tolerances of the components, there is an unbalanced magnetic force in the axial direction of the traction machine, which requires the bearing to bear a certain axial force, thus affecting the service life of the bearing; when the traction wheel and its main shaft are subjected to a large load, they are prone to deformation, resulting in uneven gaps between the disc rotor and the stator, thus affecting the electrical performance stability of the motor. It can be seen that the axial excitation traction machine still has a lot of room for improvement in the overall structural layout design. Summary of the invention

[0004] The purpose of the present invention is to improve the problem of unbalanced bearing capacity in the axial direction of the existing traction machine, and to provide a traction machine with dual motors and an assembling method thereof.

[0005] The technical solutions to achieve the above objectives include the following:

[0006] A traction machine with dual motors, comprising a traction wheel, a main shaft, two supporting bodies, and two sets of motor components, wherein the two supporting bodies are respectively arranged at both ends of the traction wheel, wherein one motor component is installed between the first end of the traction wheel and one of the supporting bodies, and the other motor component is installed between the second end of the traction wheel and the other supporting body;

[0007] The two supporting bodies are respectively sleeved on the two ends of the main rotating shaft, and the main rotating shaft and the supporting bodies are rotationally matched; the traction wheel is sleeved outside the main rotating shaft and fixed to the main rotating shaft;

[0008] The traction wheel is symmetrically arranged relative to the center of the main rotating shaft, and the two supporting points between the main rotating shaft and the traction wheel are symmetrically arranged relative to the center of the main rotating shaft.

[0009] In one embodiment, the support body has a first support member, the first support member is bent, and the first support member has a first side wall and a second side wall;

[0010] The traction wheel has a second support member, the second support member is arranged close to the first side wall and the second side wall, and a mounting groove is formed between the inner side of the second support member and the first side wall and the second side wall;

[0011] The motor assembly includes a stator core and a rotor permanent magnet, wherein the stator core is mounted on the first side wall, and the rotor permanent magnet is mounted on the inner side of the second support member; the stator core and the rotor permanent magnet are both arranged in the mounting groove, and the rotor permanent magnet is arranged close to the stator core.

[0012] In one embodiment, the first support member includes a first support portion and a second support portion, and the first support portion is fixed to the second support portion to form an L-shaped structure;

[0013] The outer surface of the first supporting portion forms a first side wall, the outer surface of the second supporting portion forms a second side wall, and the first side wall is adjacent to the second side wall.

[0014] In one embodiment, the first support portion is a hollow columnar structure, and the second support portion is a hollow disc structure;

[0015] The outer diameter of the second supporting portion is greater than the outer diameter of the first supporting portion.

[0016] In one embodiment, the traction machine further comprises a brake and a bearing assembly, wherein the bearing assembly is mounted on the first support portion and sleeved on the outside of the main rotating shaft, and the main rotating shaft is rotatably connected to the first support portion through the bearing assembly;

[0017] The brake is mounted on the second supporting part.

[0018] In one embodiment, the brake includes a brake disc, a brake pad, and a brake core. The brake core is movably mounted on the second support portion, the brake disc is mounted on the side wall of the second support member, the brake pad is mounted on the brake core, and the brake pad is arranged close to the brake disc and is used to abut against the brake disc.

[0019] In one embodiment, the bearing assembly includes a bearing and two sealing covers, the bearing is sleeved outside the main rotating shaft, the two sealing covers are sleeved outside the main rotating shaft, and the two sealing covers are respectively arranged at both ends of the bearing;

[0020] The outer ring of the bearing is fixed to the first supporting part, and the inner ring of the bearing is fixed to the main rotating shaft.

[0021] In one embodiment, the bearing assembly has two groups, and the two groups of bearing assemblies are respectively sleeved on both ends of the main shaft;

[0022] The two groups of bearing components are respectively installed on the two supporting bodies, and the two groups of bearing components are symmetrically arranged relative to the center of the main shaft.

[0023] In one embodiment, the traction wheel further comprises a rotating wheel, two second support members are respectively mounted at two ends of the rotating wheel, and an outer wall of the rotating wheel comprises a rope groove;

[0024] The second support member is an annular structure, the outer diameter of the second support member is larger than the outer diameter of the rotating wheel, and an avoidance groove is formed between the inner sides of the two second support members and the outer wall of the rotating wheel.

[0025] The present invention also provides a method for assembling a traction machine, comprising the following steps:

[0026] Step 1: Install one set of motor components on one of the supporting bodies and the first end of the traction wheel respectively; install another set of motor components on the other supporting body and the second end of the traction wheel respectively;

[0027] Step 2: The traction wheel is sleeved on the main shaft, and the two ends of the main shaft are respectively inserted into the through holes of the two supporting bodies so that the main shaft and the supporting bodies can rotate in coordination.

[0028] The technical solution provided by the present invention has the following advantages and effects:

[0029] After the two motor assemblies of this traction machine are powered on, the structures of the two motor assemblies are exactly the same, and the power they generate is also equal. The power generated by the two motor assemblies acts on the two supporting bodies through the main shaft respectively; when the traction machine is in operation, the forces borne by the two supporting bodies are consistent, achieving the dynamic balance of the traction machine. Moreover, in this traction machine, the traction wheel and the two supporting bodies are completely symmetrical relative to the center of the main shaft, so that the bearing force of the traction machine is more uniform and the force structure is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods, constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0031] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0032] Figure 1 is a schematic diagram of a traction machine with dual motors in one embodiment of the present invention;

[0033] Figure 2 is a front view of a traction machine with dual motors in one embodiment of the present invention;

[0034] Figure 3 is a cross-sectional view of a traction machine with dual motors in one embodiment of the present invention;

[0035] Figure 4 In one embodiment of the present invention Figure 3 A local enlarged view of point A;

[0036] Description of reference numerals:

[0037] 100. Traction machine; 1. Base; 2. Support body; 21. First support member; 211. First support part; 212. Second support part; 213. First side wall; 214. Second side wall; 22. Mounting groove; 23. First heat dissipation gap; 24. Second heat dissipation gap; 3. Main shaft; 4. Traction wheel; 41. Second support member; 42. Rotating wheel; 421. Rope groove; 43. Avoidance groove; 5. Brake; 51. Brake pad; 52. Brake disc; 53. Brake iron core; 6. Heat dissipation system; 61. Heat dissipation member; 62. First heat dissipation channel; 63. First heat dissipation hole; 64. Second heat dissipation channel; 65. Second heat dissipation hole; 66. Third heat dissipation channel; 7. Motor assembly; 71. Stator iron core; 72. Rotor permanent magnet; 8. Bearing assembly; 81. Sealing cover; 82. Bearing; 9. Encoder; 10. Junction box. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0039] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0040] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0042] Embodiment 1

[0043] The present invention proposes a traction machine 100 with dual motors, such as Figures 1 to 4 As shown, it includes a traction wheel 4, a main shaft 3, a support body 2, a motor assembly 7, and a heat sink 61. The traction wheel 4 is sleeved on the outside of the first end of the main shaft 3, the support body 2 is sleeved on the second end of the main shaft 3, and the main shaft 3 and the support body 2 are rotatably matched; the motor assembly 7 includes a stator core 71 and a rotor permanent magnet 72, the stator core 71 is installed on the outer side of the support body 2, the rotor permanent magnet 72 is installed on the inner side of the traction wheel 4, and the rotor permanent magnet 72 is arranged close to the stator core 71; a first heat dissipation channel 62 and a first heat dissipation hole 63 are provided between the support body 2 and the traction wheel 4, the heat sink 61 is installed on the outer wall of the support body 2, the air outlet direction of the heat sink 61 is toward the first end of the first heat dissipation channel 62, and the second end of the first heat dissipation channel 62 is connected to the first heat dissipation hole 63.

[0044] Specifically, when the stator core 71 is energized, the stator core 71 generates a magnetic field, which is equivalent to a permanent magnet, and interacts with the rotor permanent magnet 72, thereby driving the rotor permanent magnet 72 to rotate, and the rotor permanent magnet 72 drives the traction wheel 4 to rotate. The traction wheel 4 is wound with a steel rope, and the car is driven up and down by the steel rope to achieve the up and down movement of the elevator. Since the traction wheel 4 is installed on the main shaft 3, the main shaft 3 and the support body 2 rotate in coordination, so the support body 2 supports the traction wheel 4 through the main shaft 3 to rotate stably.

[0045] It has been found through research that when the motor assembly 7 is working, the coils are wound around the stator core 71 and the rotor permanent magnet 72. Depending on the material used for the coils, the increase in the excitation current, and the vibration or noise of the traction machine 100, the motor assembly 7 is likely to generate heat. The heat of the motor assembly 7 will cause demagnetization between the stator core 71 and the rotor permanent magnet 72, thereby reducing the output power of the motor assembly 7. When the motor assembly 7 overheats, it will also cause the temperature inside the motor assembly 7 to rise, thereby damaging the parts and components inside the motor; if not handled in time, the damage to these parts and components will cause the motor to malfunction, and even cause serious safety accidents. Therefore, the heating of the motor assembly 7 is directly related to the performance and power output of the motor from a small harm, and will cause safety accidents from a large harm.

[0046] Since the support body 2 and the traction wheel 4 do not need to contact each other, and an air gap with a certain spacing needs to be retained, by designing the direction of the air gap, the air gap can form a first heat dissipation channel 62 and a first heat dissipation hole 63, and the heat generated by the motor assembly 7 is dissipated into the first heat dissipation channel 62. By providing a heat sink 61, when the heat sink 61 rotates, the air with heat is accelerated to flow in the first heat dissipation channel 62, and the heat flows out from the first heat dissipation hole 63 through the first heat dissipation channel 62. The heat sink 61 blows the air outside the traction machine 100 into the first heat dissipation channel 62, realizing the cold and heat exchange inside and outside the traction machine 100, realizing the cooling of the motor assembly 7, avoiding the overheating of the motor assembly 7, and thus improving the service life and output power of the traction machine 100.

[0047] Preferably, a second heat dissipation channel 64 and a second heat dissipation hole 65 are further provided between the support body 2 and the traction wheel 4, the first heat dissipation channel 62 is connected with the second heat dissipation channel 64, the air outlet direction of the heat sink 61 is toward the first end of the second heat dissipation channel 64, and the second end of the second heat dissipation channel 64 is connected with the second heat dissipation hole 65; wherein the first heat dissipation hole 63 and the second heat dissipation hole 65 are arranged far apart. Specifically, by utilizing the air gap between the support body 2 and the traction wheel 4, a second heat dissipation channel 64 and a second heat dissipation hole 65 are further provided between the support body 2 and the traction wheel 4, the first heat dissipation channel 62 is connected with the second heat dissipation channel 64, and the first end of the first heat dissipation channel 62 intersects with the first end of the second heat dissipation channel 64, so that when the heat sink 61 rotates, the external air of the traction machine 100 can be introduced into the first heat dissipation channel 62 and the second heat dissipation channel 64 respectively. Moreover, the first heat dissipation channel 62 and the second heat dissipation channel 64 have different directions inside the traction machine 100, so that the first heat dissipation channel 62 and the second heat dissipation channel 64 respectively take away the heat generated at different positions in the traction machine 100; the first heat dissipation hole 63 and the second heat dissipation hole 65 are arranged far apart, which can avoid heat accumulation in the first heat dissipation channel 62. The heat generated in the traction machine 100 can be dissipated to the outside of the traction machine 100 through the first heat dissipation channel 62 and the first heat dissipation hole 63, and can also be dissipated to the outside of the traction machine 100 through the second heat dissipation channel 64 and the second heat dissipation hole 65, thereby further improving the heat dissipation efficiency of the traction machine 100.

[0048] Preferably, the opening direction of the first heat dissipation hole 63 intersects or is opposite to the opening direction of the second heat dissipation hole 65. Specifically, the outside of the traction machine 100 has two heat dissipation holes with different opening directions. The heat in the traction machine 100 is dissipated through the first heat dissipation hole 63 and the second heat dissipation hole 65 to avoid the heat of the traction machine 100 from accumulating at a certain position. Since heat accumulation will also increase the temperature of the local position, such an arrangement can further improve the heat dissipation efficiency.

[0049] In some embodiments, the support body 2 has a first support member 21, the first support member 21 is bent, and the first support member 21 has a first side wall 213 and a second side wall 214; the traction wheel 4 has a second support member 41, the second support member 41 is arranged close to the first side wall 213 and the second side wall 214, and an installation groove 22 is formed between the inner side of the second support member 41 and the first side wall 213 and the second side wall 214; the stator core 71 is installed on the first side wall 213, and the rotor permanent magnet 72 is installed on the inner side of the second support member 41; the stator core 71 and the rotor permanent magnet 72 are both arranged in the installation groove 22; the first heat dissipation channel 62 and the second heat dissipation channel 64 are respectively connected to the installation groove 22. Specifically, by installing the stator core 71 on the first side wall 213, and forming the installation groove 22 between the inner side of the second support member 41 and the first side wall 213 and the second side wall 214, the rotor permanent magnet 72 can be installed on the inner side of the second support member 41, and the second support member 41 is sleeved outside the first support member 21, so that the stator core 71 and the rotor permanent magnet 72 can be both arranged in the installation groove 22, and the motor assembly 7 can be hidden in the traction machine 100. In addition, the heat generated by the motor assembly 7 when working will accumulate in the installation groove 22, and the installation groove 22 is connected with the first heat dissipation channel 62 and the second heat dissipation channel 64. The hot air of the installation groove 22 diffuses to the first heat dissipation channel 62 and the second heat dissipation channel 64. When the air in the first heat dissipation channel 62 and the second heat dissipation channel 64 flows, the heat of the installation groove 22 will be taken away. Therefore, the first heat dissipation channel 62 and the second heat dissipation channel 64 can reduce the temperature of the motor assembly 7, avoid overheating of the motor assembly 7, and improve the working power of the motor assembly 7.

[0050] In some embodiments, the traction wheel 4 also has a rotating wheel 42, and the second support member 41 is installed on the side wall of the rotating wheel 42; the first support member 21 includes a first support portion 211 and a second support portion 212, the first support portion 211 and the second support portion 212 are fixed to form an L-shaped structure; a first heat dissipation gap 23 is provided between the second support portion 211 and the second support member 41, and the first heat dissipation gap 23 forms a first heat dissipation channel 62; a second heat dissipation gap 24 is provided between the first support portion 211 and the second support portion 212, and a second heat dissipation channel 64 is formed between the first support portion 211 and the rotating wheel 42, and the second heat dissipation channel 64, the mounting groove 22, the second heat dissipation gap 24, and the second heat dissipation hole 65 are connected in sequence; and or / , the second heat dissipation channel 64, the mounting groove 22, the second heat dissipation gap 24, and the air outlet of the heat dissipation member 61 are connected in sequence. Specifically, the first support part 211 is fixed to the second support part 212 to form an L-shaped structure. Such a first support member 21 has an L-shaped groove, and the second support member 41 is arranged in the L-shaped groove, so that there is a space between the first support member 21 and the second support member 41 for installing the stator core 71 and the rotor permanent magnet 72. When the second support member 41 is installed on the rotating wheel 42, the rotating wheel 42 is installed on the support body 2 through the main shaft 3. There is a gap between the first support part 211 and the rotating wheel 42, and between the second support part 212 and the second support member 41. The heat of the motor assembly 7 during operation diffuses to the gap. This gap is used to form a first heat dissipation channel 62 and a second heat dissipation channel 64, so that the second heat dissipation hole 65 is connected to the installation slot 22 through the second heat dissipation channel 64, and the first heat dissipation hole 63 is connected to the installation slot 22 through the first heat dissipation channel 62. The motor assembly 7 in the installation slot 22 dissipates heat through the two heat dissipation channels, further reducing the temperature of the motor assembly 7.

[0051] In some embodiments, the traction machine 100 further has a brake 5, which includes a brake disc 52, a brake pad 51, and a brake iron core 53. The brake iron core 53 is movably mounted on the second support portion 212, the brake disc 52 is mounted on the side wall of the second support member 41, and the brake pad 51 is mounted on the brake iron core 53. The brake pad 51 is arranged close to the brake disc 52 and is used to abut against the brake disc 52. There is a first heat dissipation gap 23 between the brake disc 52 and the second support portion 212, and the first heat dissipation hole 63 is arranged close to the brake disc 52. Specifically, the heat dissipation channel formed by the first heat dissipation gap 23 is guided to the brake disc 52, and the first heat dissipation hole 63 is arranged close to the brake disc 52. When the brake 5 is braking, the brake iron core 53 will drive the brake pad 51 to move, so that the brake pad 51 and the brake disc 52 are against each other, thereby braking the brake disc 52. When the brake pad 51 and the brake disc 52 are braking, friction will be generated between the brake pad 51 and the brake disc 52. The friction will cause the brake pad 51 and the brake disc 52 to generate high temperature. The brake disc 52 will generate a lot of heat when working. If this heat cannot be dissipated in time, the temperature of the brake disc 52 will rise, which may cause the braking force to decline or even fail. Therefore, maintaining the appropriate temperature of the brake disc 52 is crucial to the braking performance of the brake 5. When the motor assembly 7 stops working, the motor assembly 7 generates less heat, and the heat sink 61 can continue to work. Since the heat of the first heat dissipation channel 62 is relatively small, the heat diffused by the first heat dissipation channel 62 has almost no effect on the brake disc 52. The air flow speed of the first heat dissipation hole 63 and the first heat dissipation gap 23 is relatively fast, which can quickly take away the heat near the brake disc 52, reduce the temperature of the brake disc 52 and the brake pad 51, indirectly cool the brake 5, and improve the braking stability of the brake 5.

[0052] In some embodiments, the traction machine 100 also has a bearing assembly 8, the number of motor assemblies 7 is two groups, and the number of support bodies 2 corresponds to the number of motor assemblies 7; the two support bodies 2 are respectively arranged at the two ends of the traction wheel 4, one motor assembly 7 is installed between the first end of the traction wheel 4 and one of the support bodies 2, and the other motor assembly 7 is installed between the second end of the traction wheel 4 and the other support body 2; the two support bodies 2 are respectively sleeved on the two ends of the main rotating shaft 3, and the main rotating shaft 3 is rotatably connected to the support body 2 through the bearing assembly 8; the traction wheel 4 is sleeved on the outside of the main rotating shaft 3 and fixed to the main rotating shaft 3. Specifically, two groups of motor assemblies 7 are arranged, and the two stator cores 71 of the two groups of motor assemblies 7 are supported by two supporting bodies 2, and the two supporting bodies 2 are installed on the base 1; the two supporting bodies 2 have two first supporting members 21, and the two ends of the traction wheel 4 also have two second supporting members 41, and the two rotor permanent magnets 72 are respectively arranged at the two ends of the traction wheel 4 through the two second supporting members 41, and correspond to the two stator cores 71. The two groups of motor assemblies 7 arranged in this way are symmetrically arranged relative to the traction wheel 4. After the two groups of motor assemblies 7 are conductive, they will generate driving forces of the same magnitude, so that the two ends of the traction wheel 4 have two driving forces of the same magnitude, which will further improve the output power of the traction machine 100.

[0053] In some embodiments, there are two heat sinks 61, and the two heat sinks 61 are respectively arranged near the two groups of motor components 7; two first heat dissipation channels 62 and two second heat dissipation channels 64 are formed between the two support bodies 2 and the two ends of the traction wheel 4; one heat sink 61 and one of the first heat dissipation channels 62 and the second heat dissipation channels 64 form a first heat dissipation system 6; another heat sink 61 and another first heat dissipation channel 62 and the second heat dissipation channel 64 form a second heat dissipation system 6; the two heat dissipation systems 6 are respectively used for heat dissipation of the two groups of motor components 7. Specifically, by arranging the two support bodies 2 at the two ends of the traction wheel 4, an air gap is provided between the two support bodies 2 and the two ends of the traction wheel 4, so that the traction machine 100 forms two first heat dissipation channels 62 and two second heat dissipation channels 64; the two groups of motor components 7 use two heat dissipation systems 6 for heat dissipation, and the two heat dissipation systems 6 can be relatively independent.

[0054] In some other embodiments, the traction machine 100 can be made to work without using two sets of heat dissipation systems 6, and it is only necessary to reduce the output power of the traction machine 100; but using two sets of heat dissipation systems 6 for heat dissipation can increase the output power of the traction machine 100, so the heat dissipation system 6 has greater practical value and significance for the output power of the traction machine 100.

[0055] In some embodiments, a third heat dissipation channel 66 is provided in the traction wheel 4, and the two second heat dissipation channels 64 are connected through the third heat dissipation channel 66. Specifically, the two heat dissipation systems 6 can be connected through the third heat dissipation channel 66. When the traction wheel 4 is rotating, the third heat dissipation channel 66 also rotates with the traction wheel 4. The two second heat dissipation channels 64 cannot be cooled through the third heat dissipation channel 66, and the third heat dissipation channel 66 has little practical significance. However, when the traction machine 100 is stationary or rotating at a low speed, the two second heat dissipation channels 64 are connected through the third heat dissipation channel 66, so that the heat inside the traction machine 100 can be diffused through the two second heat dissipation channels 64, further improving the heat dissipation efficiency inside the traction machine 100.

[0056] Preferably, the bearing assembly 8 includes a bearing 82 and two sealing covers 81. The bearing 82 is sleeved on the outside of the main rotating shaft 3. The two sealing covers 81 are sleeved on the outside of the main rotating shaft 3. The two sealing covers 81 are respectively arranged at both ends of the bearing 82. The sealing covers 81 are fixed to the first supporting portion 211. The outer ring of the bearing 82 is fixed to the first supporting portion 211, and the inner ring of the bearing 82 is fixed to the main rotating shaft 3. Specifically, the outer ring of the bearing 82 and the ring of the bearing are rotationally matched through balls, the main rotating shaft 3 is rotationally connected to the supporting body 2 through the bearing 82, and the two sealing covers 81 are respectively arranged at both ends of the bearing 82, so that the bearing 82 can be shielded to prevent dust from falling into the bearing 82, and to prevent dust from affecting the precision of the bearing rotation, thereby further improving the stability of the bearing assembly 8 during rotation.

[0057] Embodiment 2

[0058] The present invention also provides a traction machine 100 with dual motors, such as Figures 1 to 4As shown, the traction wheel 4, the main rotating shaft 3, two supporting bodies 2, and two groups of motor components 7, the two supporting bodies 2 are respectively arranged at the two ends of the traction wheel 4, one of the motor components 7 is installed between the first end of the traction wheel 4 and one of the supporting bodies 2, and the other motor component 7 is installed between the second end of the traction wheel 4 and the other supporting body 2; the two supporting bodies 2 are respectively sleeved on the two ends of the main rotating shaft 3, and the main rotating shaft 3 and the supporting bodies 2 are rotated in cooperation; the traction wheel 4 is sleeved outside the main rotating shaft 3 and is fixed to the main rotating shaft 3; wherein the traction wheel 4 is symmetrically arranged relative to the center of the main rotating shaft 3, and the two supporting points between the main rotating shaft 3 and the traction wheel 4 are symmetrically arranged relative to the center of the main rotating shaft 3. Specifically, by arranging two supporting bodies 2 and two groups of motor components 7, the two supporting bodies 2 are used to support the two ends of the main rotating shaft 3, so that the two ends of the main rotating shaft 3 are rotated in cooperation with the two supporting bodies 2, and the traction wheel 4 is sleeved outside the main rotating shaft 3. One set of motor components 7 is arranged between the first end of the traction wheel 4 and one of the supporting bodies 2, and the other set of motor components 7 is arranged between the second end of the traction wheel 4 and the other supporting body 2; and by installing two sets of motor components 7 and two supporting bodies 2, the traction machine 100 is in a completely symmetrical structure as a whole, and the supporting body 2 can be used to set the junction box 10 and the brake 5, and their installation positions and installation quantities can also be completely symmetrical or equal.

[0059] Therefore, after the two motor assemblies 7 of the traction machine 100 are powered on, the structures of the two motor assemblies 7 are completely the same, the power generated by the two motor assemblies 7 is also equal, and the two supporting points between the rotating shaft 3 and the traction wheel 4 are symmetrically arranged relative to the center of the main rotating shaft 3, and the power generated by the two motor assemblies 7 acts on the two supporting bodies 2 through the main rotating shaft 3 respectively; when the traction machine 100 is in operation, the forces on the two supporting points between the rotating shaft 3 and the traction wheel 4 are equal to the center of the main rotating shaft 3, and the forces on the two supporting bodies 2 are consistent, so as to achieve the dynamic balance of the traction machine 100. Moreover, in the traction machine 100, the traction wheel 4 and the two supporting bodies 2 are completely symmetrical relative to the center of the main rotating shaft 3, so that the bearing force on the traction machine 100 is more uniform and the force structure is better. Therefore, the external structure of the traction machine 100 is no longer associated with the elevator hanging center and the left and right output shafts, and can be arbitrarily arranged in a small machine room, making the machine room layout design and elevator installation very convenient, and the production, assembly process and assembly process of the traction machine 100 itself are also simplified.

[0060] In some embodiments, the support body 2 has a first support member 21, which is bent and has a first side wall 213 and a second side wall 214; the traction wheel 4 has a second support member 41, which is arranged close to the first side wall 213 and the second side wall 214, and an installation groove 22 is formed between the inner side of the second support member 41 and the first side wall 213 and the second side wall 214; the motor assembly 7 includes a stator core 71 and a rotor permanent magnet 72, the stator core 71 is installed on the first side wall 213, and the rotor permanent magnet 72 is installed on the inner side of the second support member 41; the stator core 71 and the rotor permanent magnet 72 are both arranged in the installation groove 22, and the rotor permanent magnet 72 is arranged close to the stator core 71. Specifically, by arranging the second support member 41 close to the first side wall 213 and the second side wall 214, the second support member 41 is sleeved outside the first support member 21, but there is still a certain air gap between the second support member 41 and the first support member 21. The stator core 71 and the rotor permanent magnet 72 are arranged in the installation groove 22, the stator core 71 is arranged along the circumference of the first support member 21, and the rotor permanent magnet 72 is arranged along the circumference of the second support member 41. The stator core 71 is located on the outside of the first support member 21, and the rotor permanent magnet 72 is located on the inside of the second support member 41. When the traction wheel 4 is assembled with the two support bodies 2 through the main shaft 3, the motor assembly 7 is hidden in the installation groove 22. That is, the traction wheel 4 and the rotor yoke are two-in-one in structure. There is no need for an additional rotor yoke and a tightening sleeve or key for transmitting torque. The stator core 71 is hidden and fixed on the supporting body 2, making the motor structure very simple and compact, and the overall dimensions of the traction machine 100, especially the axial dimensions, can be greatly reduced, making it more suitable for small machine room application scenarios.

[0061] In addition, the stator core 71 of the motor assembly 7 can adopt a single-tooth structure, which can reduce the manufacturing difficulty and greatly improve the utilization rate of the core punching sheet material. Moreover, the stator core 71 is installed on the outer wall of the first support member 21, and the copper wire can be wound in a centralized winding manner. The end size of the centralized winding is much shorter than that of the distributed winding end, which can greatly reduce the waste of copper wire, improve material utilization, reduce costs, and also greatly reduce the axial size.

[0062] Preferably, the first support member 21 includes a first support portion 211 and a second support portion 212, the first support portion 211 and the second support portion 212 are fixed to form an L-shaped structure; the outer surface of the first support portion 211 forms a first side wall 213, the outer surface of the second support portion 212 forms a second side wall 214, and the first side wall 213 and the second side wall 214 are arranged adjacent to each other. Specifically, the first side wall 213 of the first support portion 211 can be used to install the stator core 71, and the inner side wall of the first support portion 211 can be used to install the bearing assembly 8. The main shaft 3 is rotatably connected to the first support portion 211 through the bearing assembly 8, and the supporting function of the first support portion 211 is fully utilized; and the second side wall 214 of the second support portion 212 corresponds to the outer side of the second support member 41, and can play a role in shielding the installation slot 22, so that the motor assembly 7 is completely hidden in the installation slot 22, and the second support portion 212 can also be used to support the brake 5. Therefore, the first support member 21 supports the main shaft 3, the stator core 71, and the brake 5 at the same time, so that each supporting surface of the first support member 21 is effectively utilized. While ensuring that the traction machine 100 is symmetrical, after the various components are installed, there is no interference in the functional use of the various components, and the functional role of each component can be maximized. The traction machine 100 configured in this way is more reasonable and compact in structure.

[0063] It can be understood that the traction machine 100 makes full use of the structural design of the two supporting bodies 2, so that the two motor components 7, the two bearing components 8, and the two brakes 5 are symmetrically arranged on both sides of the traction wheel 4, and are completely symmetrical relative to the center of the traction wheel 4, further making the load of the traction machine 100 more uniform and the force structure better. In this embodiment, the traction machine 100 is always in a symmetrical state after the installation of various accessories because of the use of the structure of the supporting body 2 and the structure of the traction wheel 4. Moreover, the bearing components 8 and the brakes 5 are essential functional components in the traction machine 100. The bearing force generated by the rotation of the traction wheel 4 is applied to the two supporting bodies 2 through the two sets of bearing components 8, and the forces received by the two supporting bodies 2 are also basically the same. Moreover, the two brakes 5 brake the brake discs 52 at both ends of the traction wheel 4 respectively, which can also further improve the braking efficiency of the traction machine 100.

[0064] In some embodiments, the first support portion 211 is a hollow columnar structure, and the second support portion 212 is a hollow disc-shaped structure; the outer diameter of the second support portion 212 is greater than the outer diameter of the first support portion 211. Specifically, the first support portion 211 is a hollow columnar structure, and the main shaft 3 can be installed in the first support portion 211 and rotatably connected to the first support portion 211 through the bearing assembly 8; while the second support portion 212 is a hollow disc-shaped structure, and the first support portion 211 can be installed in the second support portion 212. There are many ways to install it, such as fixing with screws, welding, and producing the first support portion 211 and the second support portion 212 by integral die-casting, which is not particularly limited here.

[0065] Through the structural features of the first support part 211 and the second support part 212, the main shaft 3, the traction wheel 4, and the support body 2 are more compact in structural installation, and the internal space of the traction machine 100 is fully utilized, so that the size of the traction machine 100 is further miniaturized.

[0066] In some embodiments, the traction machine 100 further includes a brake 5 and a bearing assembly 8, the bearing assembly 8 is mounted on the first support portion 211, and the bearing assembly 8 is sleeved outside the main shaft 3, the main shaft 3 is rotatably connected to the first support portion 211 through the bearing assembly 8; the brake 5 is mounted on the second support portion 212. Specifically, the bearing assembly 8 can be arranged in the hollow of the first support portion 211, the main shaft 3 is rotatably matched with the first support portion 211 through the bearing assembly 8, and the brake 5 is mounted on the second support portion 212, so that the positions of the bearing assembly 8 and the brake 5 on the support body 2 are more reasonable.

[0067] Preferably, the brake 5 comprises a brake disc 52, a brake pad 51, and a brake core 53, wherein the brake core 53 is movably mounted on the second support portion 212, the brake disc 52 is mounted on the side wall of the second support member 41, the brake pad 51 is mounted on the brake core 53, and the brake pad 51 is arranged close to the brake disc 52 and is used to abut against the brake disc 52. Specifically, the brake disc 52 is mounted on the side wall of the second support member 41, the brake core 53 is movably mounted on the second support portion 212, and the brake core 53 moves after being electrically conductive, thereby driving the brake pad 51 to move and away from the brake disc 52, thereby achieving a brake release state of the brake 5. When the brake core 53 is powered off, the brake core 53 is reset by the reset spring and moves to the initial position, and the brake pad 51 contacts the brake disc 52, and a large friction resistance is generated between the brake disc 52 and the brake pad 51, thereby realizing the brake holding state of the brake 5; and the brake disc 52 is fixed to the traction wheel 4 through the second support member 41, thereby realizing the emergency braking of the traction wheel 4.

[0068] In this embodiment, the brake 5 is a disc brake, and existing technology can be used, such as Chinese Patent No. 202410378304.5, which discloses a disc brake and a braking method. The disc brake will not be described in detail again.

[0069] Preferably, there are two groups of bearing assemblies 8, and the two groups of bearing assemblies 8 are respectively sleeved on the two ends of the main rotating shaft 3; the two groups of bearing assemblies 8 are respectively installed on the two supporting bodies 2, and the two groups of bearing assemblies 8 are symmetrically arranged relative to the center of the main rotating shaft 3. Specifically, the two ends of the main rotating shaft 3 are rotatably connected to the two supporting bodies 2 through the two groups of bearing assemblies 8, and the two groups of bearing assemblies 8 play the role of supporting the main rotating shaft 3, and reduce the friction resistance of the main rotating shaft 3, and improve the rotation accuracy of the main rotating shaft 3. In this way, the two supporting points of the traction wheel 4 are at equal distances from the center of the main rotating shaft 3, and the bearing forces applied are also consistent. The force generated by the main rotating shaft 3 in the direction of the axis centerline is consistent, avoiding vibration due to uneven force, and further reducing the noise of the traction machine 100.

[0070] In some embodiments, the traction wheel 4 further has a rotating wheel 42, two second support members 41 are respectively installed at both ends of the rotating wheel 42, and the outer wall of the rotating wheel 42 has a rope groove 421; the second support member 41 is an annular structure, the outer diameter of the second support member 41 is larger than the outer diameter of the rotating wheel 42, and an avoidance groove 43 is formed between the inner side of the two second support members 41 and the outer wall of the rotating wheel 42. Specifically, when the traction machine 100 is assembled, the traction rope needs to be wound in the rope groove 421 of the rotating wheel 42. When the traction machine 100 is pulling the car, the avoidance groove 43 allows the traction rope to move to avoid interference with the traction rope, and also allows the traction rope to be assembled on the traction wheel 4 with a certain installation space.

[0071] Furthermore, with the symmetrically arranged traction machine 100, only the brake disc 52, the winding traction rope, and the rotor permanent magnet 72 need to be installed on the traction wheel 4, and the rotor permanent magnets 72 of the two sets of motor assemblies 7 are respectively arranged at the two ends of the traction wheel 4. Such a structure can make the axial distance of the traction wheel 4 shorter, further shortening the axial size of the traction machine 100.

[0072] In addition, an encoder 9 is provided at either end of the main shaft 3. The main function of the encoder 9 is to convert the mechanical motion of the traction machine 100 into an electrical signal for the functions of speed control, position positioning, safety monitoring, etc. of the elevator. Through the electrical signal generated by the encoder 9, the elevator control system can monitor the operating status of the elevator in real time to ensure the safe, accurate and efficient operation of the elevator.

[0073] The present invention also provides an assembly method of the traction machine 100, characterized in that it comprises the following steps:

[0074] Step 1: Install one set of motor components 7 on one of the supporting bodies 2 and the first end of the traction wheel 4 respectively; install another set of motor components 7 on the other supporting body 2 and the second end of the traction wheel 4 respectively;

[0075] Step 2: The traction wheel 4 is sleeved on the main shaft 3, and the two ends of the main shaft 3 are respectively inserted into the through holes of the two support bodies 2, so that the main shaft 3 and the support body 2 can rotate together;

[0076] The two sets of motors 7 are respectively arranged at the two ends of the main shaft 3, and are symmetrically arranged with respect to the center of the main shaft 3. In the production of the traction machine 100, through the symmetrical arrangement, the various components of the traction machine 100, such as the main shaft 3 and the traction wheel 4, are of symmetrical structure, and the structures of the two supporting bodies 2 are the same. And through the above-mentioned assembly method, the traction machine 100 can be quickly assembled, so that the assembled traction machine 100 is in a relatively symmetrical structure as a whole.

[0077] It should be noted that in the traction machine 100, two sets of motor components 7 and two supporting bodies 2 are provided, the two ends of the main shaft 3 are rotationally matched with the two supporting bodies 2, and the traction wheel 4 is sleeved outside the main shaft 3, so that the traction machine 100 is relatively symmetrical in overall structure. In other traction machines 100, two sets of motor components 7 and two supporting bodies 2 are provided in the traction machine 100, and the two ends of the main shaft 3 are respectively rotationally connected with the two supporting bodies 2, which are all within the protection scope of this application.

[0078] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0079] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0080] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A traction machine with two motors, characterized in that: The invention comprises a traction wheel, a main rotating shaft, two supporting bodies, and two sets of motor components. The two supporting bodies are respectively arranged at the two ends of the traction wheel, one motor component is installed between the first end of the traction wheel and one of the supporting bodies, and the other motor component is installed between the second end of the traction wheel and the other supporting body. The two supporting bodies are respectively sleeved on the two ends of the main rotating shaft, and the main rotating shaft and the supporting bodies are rotationally matched; the traction wheel is sleeved outside the main rotating shaft and fixed to the main rotating shaft; The traction wheel is symmetrically arranged relative to the center of the main rotating shaft, and the two supporting points between the main rotating shaft and the traction wheel are symmetrically arranged relative to the center of the main rotating shaft.

2. The traction machine according to claim 1, characterized in that: The support body has a first support member, the first support member is bent, and the first support member has a first side wall and a second side wall; The traction wheel has a second support member, the second support member is arranged close to the first side wall and the second side wall, and a mounting groove is formed between the inner side of the second support member and the first side wall and the second side wall; The motor assembly includes a stator core and a rotor permanent magnet, wherein the stator core is mounted on the first side wall, and the rotor permanent magnet is mounted on the inner side of the second support member; the stator core and the rotor permanent magnet are both arranged in the mounting groove, and the rotor permanent magnet is arranged close to the stator core.

3. The traction machine according to claim 2, characterized in that: The first supporting member includes a first supporting portion and a second supporting portion, wherein the first supporting portion is fixed to the second supporting portion to form an L-shaped structure; The outer surface of the first supporting portion forms a first side wall, the outer surface of the second supporting portion forms a second side wall, and the first side wall is adjacent to the second side wall.

4. The traction machine according to claim 3, characterized in that: The first support portion is a hollow columnar structure, and the second support portion is a hollow disc-shaped structure; The outer diameter of the second supporting portion is greater than the outer diameter of the first supporting portion.

5. The traction machine according to claim 3, characterized in that: The traction machine further comprises a brake and a bearing assembly, wherein the bearing assembly is mounted on the first support portion and sleeved on the outside of the main rotating shaft, and the main rotating shaft is rotatably connected to the first support portion through the bearing assembly; The brake is mounted on the second supporting part.

6. The traction machine according to claim 5, characterized in that: The brake includes a brake disc, a brake pad, and a brake core. The brake core is movably mounted on the second support portion. The brake disc is mounted on the side wall of the second support member. The brake pad is mounted on the brake core. The brake pad is arranged close to the brake disc and is used to abut against the brake disc.

7. The traction machine according to claim 5, characterized in that: The bearing assembly includes a bearing and two sealing covers. The bearing is sleeved outside the main rotating shaft. The two sealing covers are sleeved outside the main rotating shaft, and the two sealing covers are respectively arranged at both ends of the bearing. The outer ring of the bearing is fixed to the first support portion, and the inner ring of the bearing is fixed to the main shaft.

8. The traction machine according to claim 5, characterized in that: The bearing assembly has two groups, and the two groups of bearing assemblies are respectively sleeved on both ends of the main shaft; The two groups of bearing components are respectively installed on the two supporting bodies, and the two groups of bearing components are symmetrically arranged relative to the center of the main shaft.

9. The traction machine according to claim 2, characterized in that: The traction wheel also has a rotating wheel, and two second support members are respectively installed at both ends of the rotating wheel, and the outer wall of the rotating wheel has a rope groove; The second support member is an annular structure, the outer diameter of the second support member is larger than the outer diameter of the rotating wheel, and an avoidance groove is formed between the inner sides of the two second support members and the outer wall of the rotating wheel.

10. A method for assembling a traction machine, characterized in that: The following steps are involved: Install one set of motor components on one of the supporting bodies and the first end of the traction wheel respectively; install another set of motor components on the other supporting body and the second end of the traction wheel respectively; The traction wheel is sleeved on the main rotating shaft, and the two ends of the main rotating shaft are respectively inserted into the through holes of the two supporting bodies, so that the main rotating shaft and the supporting bodies can rotate in coordination.

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