Drum-type outer rotor traction machine with cooling function and traction structure

Abstract

The utility model discloses a drum-type outer rotor traction machine with a cooling function and a traction structure. The traction structure comprises a machine base, a rotating shaft, a stator and a rotor. A stator fixing seat is arranged on the periphery of the rotating shaft in the inner cavity of the base; an inner ring of the stator is mounted on the stator fixing seat; the stator is located in the tubular magnet yoke, and a ventilation gap is formed between the stator and the permanent magnet; the rotor is provided with a rotor side plate at one end of the tubular magnet yoke, and the other end of the rotor and the inner wall of the inner cavity of the base form a ventilation space; the rotor side plate is provided with an air guide window, and the air guide window faces or is opposite to the rotation direction of the rotor; the rotor side plate is provided with an inner groove, the groove opening of the inner groove faces the stator, and the outer contour of the inner groove protrudes on the outer surface of the rotor to form an air guide window; and the ventilation space, the ventilation gap and the air guide window are communicated. According to the scheme, the traction sheave has an excellent cooling effect on the traction machine in any steering process, and the problem that the cooling effect is poor when an existing traction machine of an outer rotor roller structure works is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of traction machine, especially a self cooling function's drum type outer rotor traction machine and traction structure. BACKGROUND

[0002] In prior art, due to the space limitation of shaft, more and more elevators without machine room are used, and the slender drum type permanent magnet synchronous traction machine has the advantages of low height and small width, and is very suitable for the application of the elevator without machine room. However, the slender drum type permanent magnet synchronous traction machine usually adopts the inner rotor structure, the stator is fixed on the inner surface of the machine base, and the rotor is arranged in the center of the stator. The rotor core and the stator core both need to use silicon steel sheet, and the cost is relatively high. In addition, the machine base for fixing the stator is wrapped with the stator, and the overall width and height size are relatively large, which limits the application of the elevator without machine room, and the high cost is also caused by the large amount of raw materials.

[0003] In order to reduce the cost, the technical scheme of the outer rotor structure can be used. However, the heat of the drum type permanent magnet synchronous traction machine with the outer rotor structure is not easy to be discharged, and the temperature rise is high. In order to reduce the temperature rise of the motor, the prior art proposes the technical scheme of installing the fan blade on the rotor. The scheme is to cast a plurality of radial fan blades on the inner end surface of the rotor, and the ventilation hole is arranged on the machine base. When the motor rotates, the fan blade drives the airflow to cool the stator. This structure can reduce the temperature rise of the motor to a certain extent. However, the scheme still has the following disadvantages: ① The fan blade of the prior art is mainly arranged in the center of the rotor, which is suitable for the permanent magnet synchronous traction machine with large radial size, and is not suitable for the traction machine with long and thin drum structure. The main reason is that the fan blade cannot be arranged in the center of the slender rotor. ② The fan blade of the prior art is arranged in the center of the rotor, which is generally arranged in the radial direction, and belongs to the centrifugal fan design. When the rotor rotates, negative pressure is formed at the root of the fan blade. The ventilation hole is arranged at the outer position of the rotor. Obviously, the air path is not smooth. ③ In the prior art, the fan blade on the inner end surface of the rotor is integrally cast with the rotor, and the cost is high. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a kind of self cooling function's drum type outer rotor traction structure, it is installed on the rotating shaft based on the rotor, and based on the rotor is provided with air guide window, it can have smooth air path when the rotor rotates clockwise or counterclockwise, so that the traction wheel has excellent cooling effect in any direction process to traction machine.

[0005] The utility model also proposes a kind of self cooling function's drum type outer rotor traction machine, which uses the above-mentioned drum type outer rotor traction structure.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A self-cooling drum-type outer rotor traction structure, comprising a base, a rotating shaft, a stator and a rotor;

[0008] The base is provided with a base inner cavity, and the rotating shaft is rotatably installed in the base inner cavity;

[0009] The base inner cavity is provided with a stator fixing seat at the outer periphery of the rotating shaft, and the inner ring of the stator is installed in the stator fixing seat; the rotor is connected to the rotating shaft; the rotor is provided with a tubular magnetic yoke, the inner wall of the tubular magnetic yoke is provided with a permanent magnet; the stator is located in the tubular magnetic yoke, and a ventilation gap is formed between the stator and the permanent magnet;

[0010] The rotor is provided with a rotor side plate at one end of the tubular magnetic yoke, and the other end of the rotor forms a ventilation gap with the inner wall of the base inner cavity; the rotor side plate is provided with an air guide window, and the air guide window faces or is away from the rotating direction of the rotor; the rotor side plate is provided with an inner groove at the inner side of the tubular magnetic yoke, the groove opening of the inner groove faces the stator, and the outer contour of the inner groove protrudes on the outer surface of the rotor to form the air guide window;

[0011] The ventilation gap, the ventilation gap and the air guide window are communicated.

[0012] Optimally, the rotor side plate is a metal sheet, and the inner groove is formed on the rotor side plate by stamping.

[0013] Optimally, the outer ring of the rotor side plate is fixed to one end of the tubular magnetic yoke;

[0014] The rotor is provided with a support sleeve; the middle part of the rotor side plate is provided with a flange hole; the support sleeve is fixed to the flange hole, and the rotating shaft is installed in the support sleeve.

[0015] Optimally, the base is provided with ventilation openings; part of the ventilation openings are front ventilation openings, and part of the ventilation openings are rear ventilation openings;

[0016] The base inner cavity is provided with the front ventilation openings in front of the stator, and the base inner cavity is provided with the rear ventilation openings behind the stator; one end of the tubular magnetic yoke towards the rear ventilation openings is provided with the rotor side plate; the opening of the other end of the tubular magnetic yoke faces the front ventilation openings; the rotor side plate is provided with an air guide window at the outer periphery of the rotating shaft, and the air guide window faces or is away from the rotating direction of the rotor;

[0017] The front ventilation openings, the ventilation gap, the air guide window and the rear ventilation openings are communicated.

[0018] Optimally, the base is provided with ventilation openings, and part of the ventilation openings are base ventilation openings;

[0019] The outer surface of the frame is provided with the frame vent at the winding end of the stator, and the frame vent exposes the rotor or the stator;

[0020] The frame vent is in communication with the ventilation gap.

[0021] Optimally, the frame comprises a main frame and an end cover;

[0022] The end cover is mounted on the main frame, and the end cover is provided with the stator fixing seat; the inner circle of the stator fixing seat and the main frame are respectively provided with bearing holes, and the rotating shaft is rotatably mounted in the bearing holes of the main frame and the end cover.

[0023] Optimally, the main frame comprises a connecting plate, a front support plate, a rear support plate and a foot plate;

[0024] The end cover is detachably mounted on the front support plate;

[0025] The frame is provided with vents; part of the vents are top hollowed-out openings, part of the vents are side hollowed-out openings, and part of the vents are bottom hollowed-out openings;

[0026] The front support plate is arranged in front of the rear support plate; the connecting plate is located above the left and right of the stator fixing seat, and the connecting plate connects the upper parts of the front support plate and the rear support plate; the foot plate connects the lower parts of the front support plate and the rear support plate; the front support plate, the rear support plate and the connecting plate form the top hollowed-out opening above the stator fixing seat; the front support plate, the rear support plate, the connecting plate and the foot plate form the side hollowed-out opening on the left and right sides of the stator fixing seat; the foot plates at the left and right positions are separated and form the bottom hollowed-out opening below the stator fixing seat; the outer circle of the rotor is close to or extends into at least one of the top hollowed-out opening, the side hollowed-out opening and the bottom hollowed-out opening.

[0027] A drum type outer rotor traction machine with cooling function, comprising: a traction wheel, a brake and the above-mentioned drum type outer rotor traction structure;

[0028] The traction wheel is mounted on one end of the rotating shaft; the brake is mounted on the other end of the rotating shaft.

[0029] Optimally, the brake is a shaft brake.

[0030] Optimally, the inside of the rotating shaft is a through structure.

[0031] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0032] The present scheme provides a drum type outer rotor traction structure with cooling function, which is installed on the rotating shaft through the rotor, and is provided with air guide window based on the rotor, so that the smooth air path is formed when the rotor rotates clockwise or counterclockwise, thereby having excellent cooling effect on the traction machine in the process of rotating in any direction, and solving the problem of poor cooling effect of the existing outer rotor drum structure traction machine during operation. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic diagram of one embodiment of the drum type outer rotor traction machine;

[0034] Figure 2 is a sectional structure schematic diagram of one embodiment of the drum type outer rotor traction machine;

[0035] Figure 3 is Figure 2 is an enlarged view of A part in

[0036] Figure 4 is a structural schematic diagram of one embodiment of the rotor;

[0037] Figure 5 is an exploded structural schematic diagram of one embodiment of the machine base;

[0038] Figure 6 is a sectional structure schematic diagram of one embodiment of the drum type outer rotor traction machine;

[0039] Figure 7 is Figure 2 is an enlarged view of B part in

[0040] Figure 8 is a sectional structure schematic diagram of one embodiment of the rotor.

[0041] Among them:

[0042] Machine base 1, traction wheel 2, rotating shaft 3, brake 4, stator 5, rotor 6;

[0043] Machine base inner cavity 11; Stator fixing seat 12; Front air vent 13; Rear air vent 14; Machine base air vent 15; Top hollow opening 16, side hollow opening 17, bottom hollow opening 18;

[0044] Main frame 10, end cover 105; Connecting plate 101, front support plate 102, rear support plate 103, anchor plate 104; Bearing hole 121; Air vent 100;

[0045] Tubular magnetic yoke 61; Rotor side plate 62; Air guide window 63; Ventilation gap 64; Permanent magnet 65; Support sleeve 66; Inner groove 621; Groove opening 622; Flange hole 623. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, are for the purpose of explanation only and are not to be construed as limiting the present application.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be construed as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features, which are used to distinguish the described features, and have no order or weight. In the description of the present application, "a plurality of" means two or more, unless otherwise stated.

[0048] As Figures 1-8 A drum type outer rotor traction structure with cooling function, comprising: a base 1, a rotating shaft 3, a stator 5 and a rotor 6;

[0049] The base 1 is provided with a base inner cavity 11, and the rotating shaft 3 is rotatably installed in the base inner cavity 11;

[0050] The base inner cavity 11 is provided with a stator fixing seat 12 at the outer periphery of the rotating shaft 3, and the inner ring of the stator 5 is installed in the stator fixing seat 12; the rotor 6 is connected to the rotating shaft 3; the rotor 6 is provided with a tubular magnetic yoke 61, and the inner wall of the tubular magnetic yoke 61 is provided with a permanent magnet 65; the stator 5 is located in the tubular magnetic yoke 61, and a ventilation gap 64 is formed between the stator 5 and the permanent magnet 65;

[0051] The rotor 6 is provided with a rotor side plate 62 at one end of the tubular magnetic yoke 61, and the other end of the rotor 6 forms a ventilation gap 19 with the inner wall of the base inner cavity 11; the rotor side plate 62 is provided with an air guide window 63, and the air guide window 63 faces or faces away from the rotating direction of the rotor 6; the rotor side plate 62 is provided with an inner groove 621 on the inner side of the tubular magnetic yoke 61, the groove opening 622 of the inner groove 621 faces the stator 5, and the outer contour of the inner groove 621 protrudes on the outer surface of the rotor 6 to form the air guide window 63;

[0052] The ventilation gap 19, the ventilation gap 64 and the air guide window 63 are in communication.

[0053] The present application provides a drum type outer rotor traction structure with cooling function, which is installed on the rotating shaft 3 through the rotor 6, and is provided with an air guide window 63 based on the rotor 6, so that a smooth air path is formed when the rotor 6 rotates clockwise or counterclockwise, thereby achieving excellent cooling effect on the traction machine during the rotation of the traction wheel 2 in any direction, and solving the problem of poor cooling effect of the existing outer rotor drum structure traction machine during operation.

[0054] Specifically, the machine base 1 is provided with a machine base inner cavity 11, the machine base inner cavity 11 is provided with a bearing hole 121 at the front and / or rear, and the connection relationship between the bearing and the bearing hole 121 can be determined according to the actual situation; for example, the outer ring of the bearing is installed in the bearing hole 121, and the inner ring of the bearing is sleeved on the rotating shaft 3; one end of the rotating shaft 3 can be installed with the traction wheel 2, and the other end can be connected with the brake 4, and the relative position can be set according to the needs; the machine base inner cavity 11 is provided with a stator fixing seat 12, which is used to install the stator 5, so that the stator 5 surrounds the rotating shaft 3 in the machine base inner cavity 11; the rotor 6 is provided with a tubular magnetic yoke 61, and a permanent magnet 65 is arranged on the inner wall of the tubular magnetic yoke 61; the permanent magnet 65 on the inner wall of the tubular magnetic yoke 61 surrounds the outer periphery of the stator 5, one end of the tubular magnetic yoke 61 is an opening of the tubular magnetic yoke 61, the opening is in communication with the outside of the rotor 6 through the ventilation gap 64, and forms a ventilation gap 19 with the inner wall of the machine base inner cavity 11; the ventilation gap 19 can ensure the smoothness of air entering and leaving the ventilation gap 64; the other end of the tubular magnetic yoke 61 is provided with a rotor side plate 62, and the inner ring of the rotor side plate 62 is installed on the rotating shaft 3; the rotation of the rotor 6 relative to the stator 5 drives the rotation of the rotating shaft 3, and the tubular magnetic yoke 61 and the permanent magnet 65 on the inner wall thereof rotate relative to the outer periphery of the stator 5; at the same time, the rotor side plate 62 is provided with an air guide window 63 at the other end of the tubular magnetic yoke 61; the air guide window 63 is also in communication with the outside of the rotor 6, and faces or faces away from the rotation direction of the rotor 6; in this way, the structure of the stator 5 and the rotor 6 themselves, combined with the orientation of the air guide window 63, can make the traction structure of the present application have a smooth ventilation path;

[0055] As Figure 2 and Figure 4When the rotating shaft 3 rotates counterclockwise, the air guide window 63 faces the counterclockwise direction, and the air guide window 63 is easier to guide air when rotating, so that the air near the air guide window 63 can enter the air guide window 63, and the rotation of the rotating shaft 3 drives the rotor side plate 62 of the tubular magnetic yoke 61 to rotate, so that the air enters the tubular magnetic yoke 61 through the air guide window 63 of the rotor side plate 62; the pressure of the air in the tubular magnetic yoke 61 increases, mainly in the area between the rotor side plate 62 and the stator 5, and the air will continue to be transmitted to the ventilation gap 64 between the stator 5 and the inner wall of the rotor 6 under the action of pressure; in this way, the air is discharged into the inner cavity 11 of the machine base at the ventilation interval 19, thereby taking away the heat of the stator 5 and the rotor 6 and realizing the cooling function when the rotating shaft 3 rotates counterclockwise.

[0056] As Figure 2 and Figure 4 When the rotating shaft 3 rotates clockwise, the air guide window 63 faces the counterclockwise direction, and it is difficult for the air guide window 63 to guide air into the tubular magnetic yoke 61 when rotating, so that the air guide window 63 is more conducive to discharging air, and thus the air between the stator 5 and the rotor side plate 62 in the tubular magnetic yoke 61 is output to the inner cavity 11 of the machine base when the tubular magnetic yoke 61 rotates, thereby forming a negative pressure between the stator 5 and the rotor side plate 62; under the action of negative pressure, the air in the inner cavity 11 of the machine base at the ventilation interval 19 continues to be transmitted to the ventilation gap 64 between the stator 5 and the inner wall of the rotor 6 under the action of negative pressure; in this way, the air is discharged into the inner cavity 11 of the machine base at the air guide window 63, and the air takes away the heat of the stator 5 and the rotor 6 during transmission, thereby realizing the cooling function when the rotating shaft 3 rotates clockwise.

[0057] The air in the inner cavity 11 of the machine base realizes the flow of air through the rotation of the rotor 6, the ventilation interval 19 maintains a certain interval between the rotor 6 and the inner wall of the inner cavity 11 of the machine base, and the ventilation interval 19 can ensure that the air normally enters and exits the ventilation gap 64, so that the heat between the stator 5 and the rotor 6 is taken away; further, the air in the inner cavity 11 of the machine base can exchange heat with the outside through the metal inner wall, and / or enter and exit the inner cavity 11 of the machine base through the assembly gap of the machine base 1, and / or enter and exit the inner cavity 11 of the machine base through the ventilation port 100 at any position. In this way, the present scheme has excellent cooling effect on the traction machine in any rotating process of the traction sheave 2, and solves the problem of poor cooling effect of the existing outer rotor drum structure traction machine during operation. At the same time, the rotor 6 of the present scheme can produce good cooling effect whether it rotates counterclockwise or clockwise, which is a good solution to the problem that the existing traction machine with long and thin drum structure cannot be effectively cooled, and the smooth and stable air path of the present scheme also has good cooling effect on the traction machine with long and thin ratio.

[0058] At the same time, as Figure 3The inner groove 621 of the rotor side plate 62 is provided with a wind guide window 63 on the outer surface of the rotor 6. The present scheme ingeniously utilizes the structural advantages of the inner groove 621. The groove opening 622 at one end of the inner groove 621 is horizontally directed towards the stator 5. The wind guide window 63 at the other end of the inner groove 621 is offset to be directed towards or away from the rotation direction of the rotor 6, that is, the wind guide window 63 is directed in the circumferential direction of the rotor side plate 62 and on the outer surface of the rotor 6. Air can be switched from straight-line transmission to circumferential transmission, so that the air intake and exhaust efficiency of the rotor side plate 62 is improved.

[0059] The slot opening of the inner groove 621 is located at the end of the stator 5. The stator 5 is located in the permanent magnet 65 on the inner wall of the tubular magnetic yoke 61, that is, the side wall of the inner circle of the stator 5 is adjacent to the permanent magnet 65. The stator 5 is sleeved on the stator fixing seat 12, so that the side wall of the outer circle of the stator 5 is matched with the stator fixing seat 12. In this way, when the slot opening of the inner groove 621 is located at the end of the stator 5, air entering and exiting the inner groove 621 can be directly output to the end of the stator 5 or receive air from between the end and the side wall of the stator 5. The air path is smooth and stable, the cooling stability is further improved, and the performance of the traction machine can be improved.

[0060] Optimally, the rotor side plate 62 is a metal sheet, and the inner groove 621 is formed on the rotor side plate 62 by stamping.

[0061] The inner groove 621 of the present scheme is integrally combined with the rotor side plate 62. Since a large number of wind guide windows 63 are required to ensure cooling through multiple wind guide windows 63 at the same time, the cooling effect is improved. The use of a metal sheet to form the wind guide window 63 by stamping not only improves the cooling effect, but also combines the stamping process, so that the production efficiency of stamping is high, the manufacturing cost of the wind guide window 63 is reduced, and the cooling cost is greatly reduced. At the same time, the wind guide windows 63 on the rotor side plate 62 can be stamped into different shapes, which is convenient to process and can also be designed in a targeted manner to adapt to the air path.

[0062] Optimally, the outer circle of the rotor side plate 62 is fixed to one end of the tubular magnetic yoke 61.

[0063] The rotor 6 is provided with a support sleeve 66. The middle part of the rotor side plate 62 is provided with a flange hole 623. The support sleeve 66 is fixed to the flange hole 623, and the rotating shaft 3 is installed on the support sleeve 66.

[0064] The middle part of the rotor side plate 62 is provided with a flange hole 623, which is preferably formed by stamping and is arranged on the rotor side plate 62. The flange hole 623 is used to install a support sleeve 66, which is installed on the rotating shaft 3. In this way, the rotor side plate 62 is connected to the rotating shaft 3 through the support sleeve 66. The design of the flange hole 623 can increase the contact area of the rotor side plate 62 with the support sleeve 66, thereby making the connection between the rotating shaft 3 and the rotor 6 more stable and improving the safety and reliability. At the same time, the rotor 6 of the present scheme is provided with a tubular magnetic yoke 61. On the one hand, the tubular magnetic yoke 61 of the rotor 6 can be processed from a pipe material, which is low in cost. On the other hand, the rotor 6 of the present scheme uses an outer rotor 6 structure, which can reduce the amount of silicon steel sheet used and further reduce the cost. The rotor side plate 62 is fixed to one end of the tubular magnetic yoke 61, and / or the support sleeve 66 is fixed to the flange hole 623, which can be fixed by a known method, such as welding, screw fixing, clamping, etc.

[0065] The positions of the ventilation openings can be arranged at any position of the machine base 1 as long as air suction and air exhaust are achieved. In some embodiments, the machine base 1 is provided with ventilation openings 100. Some of the ventilation openings are front ventilation openings 13, and some of the ventilation openings are rear ventilation openings 14.

[0066] The machine base inner cavity 11 is provided with the front ventilation openings 13 in front of the stator 5, and is provided with the rear ventilation openings 14 behind the stator 5. One end of the tubular magnetic yoke 61 towards the rear ventilation openings 14 is provided with the rotor side plate 62. The other end of the tubular magnetic yoke 61 is open towards the front ventilation openings 13. The rotor side plate 62 is provided with air guide windows 63 on the outer periphery of the rotating shaft 3, which are oriented towards or away from the rotating direction of the rotor 6.

[0067] The front ventilation openings 13, ventilation gaps 64, air guide windows 63 and rear ventilation openings 14 are in communication.

[0068] The structures of the stator 5 and the rotor 6 themselves, combined with the orientation of the air guide windows 63, can make the traction structure of the present scheme have a smooth ventilation path.

[0069] As Figure 2 and Figure 4When the rotating shaft 3 rotates anticlockwise, the air guide window 63 faces the anticlockwise direction, and the air guide window 63 is easier to guide air when rotating, so that air can enter from the rear air vent 14, and the rotating shaft 3 drives the rotor side plate 62 of the tubular magnetic yoke 61 to rotate, so that air enters the tubular magnetic yoke 61 through the air guide window 63 of the rotor side plate 62; the pressure of the air in the tubular magnetic yoke 61 increases, mainly in the area between the rotor side plate 62 and the stator 5, and the air will continue to be transmitted to the ventilation gap 64 between the inner wall of the stator 5 and the rotor 6 under the action of pressure; in this way, the air will be discharged outside the traction machine at the front air vent 13, and will take away the heat of the machine base 1, the stator 5 and the rotor 6, etc. during transmission, thereby realizing the cooling function when the rotating shaft 3 rotates anticlockwise.

[0070] As Figure 2 and Figure 4 When the rotating shaft 3 rotates clockwise, the air guide window 63 faces the anticlockwise direction, and it is difficult for the air guide window 63 to guide air into the tubular magnetic yoke 61 when rotating, and the air guide window 63 is more conducive to discharging air, so that the air guide window 63 will output the air in the tubular magnetic yoke 61 between the stator 5 and the rotor side plate 62 to the rear air vent 14 when the tubular magnetic yoke 61 rotates, thereby forming a negative pressure between the stator 5 and the rotor side plate 62; under the action of negative pressure, air enters from the front air vent 13 and continues to be transmitted to the ventilation gap 64 between the inner wall of the stator 5 and the rotor 6 under the action of negative pressure; in this way, the air will be discharged outside the traction machine at the rear air vent 14, and will take away the heat of the machine base 1, the stator 5 and the rotor 6, etc. during transmission, thereby realizing the cooling function when the rotating shaft 3 rotates clockwise.

[0071] Optimally, the machine base 1 is provided with air vents 100, and part of the air vents 100 are machine base air vents 15;

[0072] The outer surface of the machine base 1 is provided with the machine base air vents 15, and the machine base air vents 15 expose the rotor 6 or the stator 5;

[0073] The machine base air vents 15 are in communication with the ventilation gap 64.

[0074] In addition to the front vent 13 or the rear vent 14, the base vent 15 is added in this embodiment. The base vent 15 can be replaced by the top hollow 16, the side hollow 17 or the bottom hollow 18 as long as it is close to the outer edge of the rotor 6 or the end of the stator 5. When the shaft 3 rotates clockwise, the air inlet window 63 faces the counterclockwise direction. Under the action of negative pressure, the air enters from the front vent 13. The air can also enter from the base vent 15. The air enters the gap between the stator 5 and the inner wall of the tubular yoke 61. Finally, the air is output from the rear vent 14 through the air inlet window 63. When the shaft 3 rotates counterclockwise, the air inlet window 63 faces the counterclockwise direction. When the air inlet window 63 rotates, it is easier to enter the air. The air can enter the tubular yoke 61 from the rear vent 14. Then, the air enters the gap between the stator 5 and the inner wall of the tubular yoke 61. Finally, the air can be discharged from the front vent 13. The air can also be discharged from the base vent 15. In this way, the base vent 15 increases the range of air entering and exiting the inner cavity 11 of the base. The air flow at the end of the stator 5 is improved. The winding end can fully contact the air. At the same time, the base vent 15 is completely or incompletely exposed to the rotor 6. The air can directly contact the outer wall of the rotor 6. The traction machine can be directly cooled when the rotor 6 rotates clockwise or counterclockwise. Thus, the rotor 6 can be cooled in all directions.

[0075] Optimally, the base 1 comprises a main frame 10 and an end cover 105.

[0076] The end cover 105 is mounted on the main frame 10. The end cover 105 is provided with the stator fixing seat 12. The inner ring of the stator fixing seat 12 and the main frame 10 are respectively provided with bearing holes 121. The shaft 3 is rotatably mounted in the bearing holes 121 of the main frame 10 and the end cover 105.

[0077] The base 1 of the present scheme can be an integrated structure frame structure, or a split structure of the main frame 10 and the end cover 105. Specifically, the base 1 can comprise a main frame 10 and an end cover 105. The end cover 105 is mounted on the main frame 10. The end cover 105 has a stator fixing seat 12. The inner ring of the stator fixing seat 12 is provided with a bearing hole 121. The main frame 10 is provided with a bearing hole 121 corresponding to the inner cavity 11 of the base. The shaft 3 can be rotatably mounted in the bearing hole 121 through a bearing. The split base 1 can reduce the processing difficulty and the installation difficulty.

[0078] Optimally, the main frame 10 comprises a connecting plate 101, a front support plate 102, a rear support plate 103 and a foot plate 104.

[0079] The end cover 105 is detachably mounted on the front support plate 102.

[0080] The base 1 is provided with ventilation openings 100; part of the ventilation openings 100 are top hollow openings 16, part of the ventilation openings 100 are side hollow openings 17, and part of the ventilation openings 100 are bottom hollow openings 18;

[0081] The front support plate 102 is arranged in front of the rear support plate 103; the connecting plates 101 are respectively located above the left and right of the stator fixing seat 12, and the connecting plates 101 connect the upper parts of the front support plate 102 and the rear support plate 103; the foot plates 104 connect the lower parts of the front support plate 102 and the rear support plate 103; the front support plate 102, the rear support plate 103 and the connecting plates 101 form the top hollow openings 16 above the stator fixing seat 12; the front support plate 102, the rear support plate 103, the connecting plates 101 and the foot plates 104 form the side hollow openings 17 on the left and right sides of the stator fixing seat 12; the foot plates 104 on the left and right are spaced apart and form the bottom hollow openings 18 below the stator fixing seat 12; the outer ring of the rotor 6 is close to or extends into at least one of the top hollow openings 16, the side hollow openings 17 and the bottom hollow openings 18.

[0082] The base 1 is provided with a hollow base inner cavity 11; the stator fixing seat 12 is used for fixing the stator 5, so that the position of the stator 5 is fixed in the base inner cavity 11; generally, the inner ring of the rotor 6 is connected to the rotating shaft 3, and the outer ring of the rotor 6 is arranged outside the outer ring of the stator 5; the rotor 6 drives the rotating shaft 3 to rotate relative to the stator 5, and drives the traction wheel 2 of the rotating shaft 3 to rotate. The base 1 is designed in the scheme; wherein the base inner cavity 11 is exposed to the side hollow opening 17 on the left and right sides of the stator fixing seat 12, the rotor 6 is coaxially arranged with the stator 5, and the outer diameter of the rotor 6 can be infinitely close to the side hollow opening 17; the top of the base inner cavity 11 is provided with a top hollow opening 16, and the top hollow opening 16 is located above the stator fixing seat 12; the side hollow opening 17 and the top hollow opening 16 are transitioned through the connecting plate 101; the connecting plate 101 is inclined, the inclined upper end of the connecting plate 101 is connected to the top hollow opening 16 and located above the stator fixing seat 12, and the inclined lower end of the connecting plate 101 is connected to the side hollow opening 17 and located above the rotor 6; the connecting plate 101 is arranged in the form of an “eight” above the left and right sides of the base inner cavity 11; the foot plates 104 on the left and right sides are separated and form a bottom hollow opening 18 below the stator fixing seat 12, and the outer diameter of the rotor 6 can be infinitely close to the bottom hollow opening 18 below. In this way, the base 1 is hollow on the top, bottom, left and right sides, and when the left and right side hollow openings 17, the top hollow opening 16 above and the bottom hollow opening 18 below are infinitely close to the outer diameter of the rotor 6, the gap can be 0 in theory, which means that the minimum width of the whole machine can be close to the outer diameter of the rotor 6, thereby greatly reducing the width of the traction machine, making the structure of the base 1 more compact, and greatly reducing the overall size and material of the traction machine, thereby reducing the use cost and processing cost, and making it more convenient to apply to the environment without machine room, and solving the problem that the existing traction machine has too much space occupied by the non-rotor 6 in the base, which leads to the increase of cost and weight.

[0083] The base 1 is mainly composed of the following plate bodies: the front support plate 102, the rear support plate 103, the foot plate 104, the end cover 105 and the connecting plate 101, and the five plate bodies form the base inner cavity 11; the connection between the front support plate 102, the rear support plate 103, the foot plate 104 and the connecting plate 101 can be connected by a known method, such as welding, screwing, integral casting, clamping, etc., and the base 1 is composed of the above four plate bodies, and then the end cover 105 is detachably mounted on the front support plate 102, so as to assemble the complete base 1.

[0084] The base 1 is mainly composed of the following plate bodies: a front support plate 102, a rear support plate 103, a foot plate 104, an end cover 105 and a connecting plate 101, which surround to form a base inner cavity 11; the connection between the front support plate 102, the rear support plate 103, the foot plate 104 and the connecting plate 101 can be connected through a known manner, such as welding, screw fixing, clamping fixing, etc., the base 1 is pre-assembled by the above four, and then the end cover 105 is detachably installed on the front support plate 102, so as to assemble the complete base 1; since the front support plate 102, the rear support plate 103, the foot plate 104, the end cover 105 and the connecting plate 101 can be respectively formed, the plate bodies can be strictly processed according to the size ratio when cutting, the overall width and height of the base 1 can be very small, and the processing of each plate body is also very convenient.

[0085] A drum type outer rotor traction machine with cooling function, comprising: a traction wheel 2, a brake 4 and the above-mentioned drum type outer rotor traction structure;

[0086] The traction wheel 2 is installed at one end of the rotating shaft 3; the brake 4 is installed at the other end of the rotating shaft 3.

[0087] The brake 4 and the traction wheel 2 of the present scheme can be installed at any position of the rotating shaft 3 as needed, for example Figure 2 The traction wheel 2 can be installed at the front end of the rotating shaft 3, and the traction wheel 2 can be installed at the rear end of the rotating shaft 3; conversely, the traction wheel 2 can be installed at the rear end of the rotating shaft 3, and the traction wheel 2 can be installed at the front end of the rotating shaft 3; in this way, the present scheme can simplify the installation requirements of the brake 4 and the traction wheel 2, and improve the installation flexibility of the brake 4 and the traction wheel 2.

[0088] Optimally, the brake 4 is a shaft brake.

[0089] As known in the art, the shaft brake 4 is a brake that exerts a braking force on the rotating shaft 3 to stop the rotating shaft 3 from rotating, so as to make the output end of the traction machine stationary; and based on the shaft brake structure adopted by the traction machine, the rotor 6 only bears pure torque and does not bear radial load, so even if the rotor side plate 62 is formed by using a thin plate material or the tubular magnetic yoke 61 is formed by using a relatively thin pipe material, the rotor 6 will not deform. Further, since the rotor 6 can be made thinner and the thickness of the tubular magnetic yoke 61 is small, on the one hand, the use cost is reduced, and on the other hand, the cooling effect on the rotor 6 can be improved when air directly contacts the outside of the rotor 6, so that the present scheme can simultaneously have both internal cooling and external cooling modes.

[0090] Optimally, the inside of the rotating shaft 3 is a through structure.

[0091] The scheme can be based on the light weight of the base 1, further reduce the weight of the rotating shaft 3, specifically, the rotating shaft 3 is set to the through structure, can reduce the load of the base 1. According to the common knowledge, the shaft brake brake is that the braking force acts on the rotating shaft 3, makes the rotating shaft 3 stop rotating, thereby makes the output end of the tractor stationary;And the scheme is based on the shaft brake structure of the tractor, the rotor 6 only bears the pure torque, does not bear the radial load, so even if the rotating shaft 3 is the through structure, the rotor 6 will not appear deformation.

[0092] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A drum-type external rotor traction structure with self-cooling function, characterized in that, include: Frame, shaft, stator, and rotor; The base has an inner cavity, and the rotating shaft is rotatably mounted in the inner cavity. The machine base cavity has a stator fixing seat on the outer periphery of the rotating shaft, and the inner ring of the stator is installed on the stator fixing seat; the rotor is connected to the rotating shaft; the rotor is provided with a tubular magnetic yoke, and the inner wall of the tubular magnetic yoke is provided with a permanent magnet; the stator is located inside the tubular magnetic yoke, and a ventilation gap is formed between the stator and the permanent magnet; The rotor has a rotor side plate at one end of the tubular magnetic yoke, and the other end of the rotor forms a ventilation gap with the inner wall of the machine base cavity; the rotor side plate has an air guide window; the rotor side plate has an inner groove on the inner side of the tubular magnetic yoke, the groove opening of the inner groove faces the stator, and the outer contour of the inner groove protrudes on the outer surface of the rotor to form the air guide window, and the air guide window faces or is opposite to the rotation direction of the rotor; The ventilation spacing, ventilation gap, and air guide window are connected.

2. The drum-type external rotor traction structure with self-cooling function according to claim 1, characterized in that, The rotor side plate is a thin metal plate, and the inner groove is formed by stamping on the rotor side plate.

3. The drum-type external rotor traction structure with self-cooling function according to claim 2, characterized in that, The outer ring of the rotor side plate is fixed to one end of the tubular magnetic yoke; The rotor is provided with a support sleeve; the rotor side plate is provided with a flange hole in the middle; the support sleeve is fixed to the flange hole, and the rotating shaft is installed on the support sleeve.

4. The drum-type external rotor traction structure with self-cooling function according to claim 1, characterized in that, The base is provided with ventilation openings; some of the ventilation openings are front ventilation openings, and some of the ventilation openings are rear ventilation openings; The machine base cavity is provided with the front ventilation port at the front of the stator, and the machine base cavity is provided with the rear ventilation port at the rear of the stator; The rotor side plate is provided at one end of the tubular magnetic yoke facing the rear vent; the opening at the other end of the tubular magnetic yoke faces the front vent; the rotor side plate is provided with an air guide window on the outer periphery of the rotating shaft, and the air guide window faces or is opposite to the rotation direction of the rotor. The front vent, ventilation gap, air guide window, and rear vent are connected.

5. The drum-type external rotor traction structure with self-cooling function according to claim 1, characterized in that, The base is provided with ventilation openings, and some of the ventilation openings are base ventilation openings; The outer surface of the frame is provided with a frame ventilation opening at the winding end of the stator, and the frame ventilation opening exposes the rotor or stator; The base ventilation opening is connected to the ventilation gap.

6. A drum-type external rotor traction structure with self-cooling function according to any one of claims 1-5, characterized in that, The base includes: a main frame and end caps; The end cap is mounted on the main frame, and the end cap is provided with the stator fixing seat; the inner ring of the stator fixing seat and the main frame are respectively provided with bearing holes, and the rotating shaft is rotatably mounted in the bearing holes of both the main frame and the end cap.

7. The drum-type external rotor traction structure with self-cooling function according to claim 6, characterized in that, The main frame includes: a connecting plate, a front support plate, a rear support plate, and a base plate; The end cap is detachably mounted to the front support plate; The base is provided with ventilation openings; some of the ventilation openings are top-hollow openings, some are side-hollow openings, and some are bottom-hollow openings. The front support plate is positioned in front of the rear support plate; the connecting plates are located at the upper left and upper right of the stator mounting base, respectively, and the connecting plates connect the upper sides of the front support plate and the rear support plate; the base plate connects the lower sides of the front support plate and the rear support plate; the front support plate, the rear support plate, and the connecting plate form the top cutout above the stator mounting base; the front support plate, the rear support plate, the connecting plate, and the base plate form the side cutouts on the left and right sides of the stator mounting base; the base plates in the left and right positions are spaced apart and form the bottom cutout below the stator mounting base; the outer ring of the rotor is close to or extends into at least one of the top cutout, the side cutout, and the bottom cutout.

8. A drum-type external rotor traction machine with self-cooling function, characterized in that, include: The traction sheave and brake and the drum-type external rotor traction structure as described in any one of claims 1-7; The traction sheave is mounted on one end of the shaft; The brake is mounted on the other end of the shaft.

9. A drum-type external rotor traction machine with self-cooling function according to claim 8, characterized in that, The brake is an axle brake.

10. A drum-type external rotor traction machine with self-cooling function according to claim 9, characterized in that, The shaft has a hollow internal structure.

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