Traction structure with heat dissipation function and traction machine

Abstract

The invention discloses a traction structure with a heat dissipation function and a traction machine. Comprising a base, a stator and a rotor. The base is provided with an annular groove; a groove opening is exposed in the relative front of the annular groove, and a base ventilation hole is formed in the end face side wall of the relative rear of the annular groove; a central cylinder is arranged in the center of the annular groove; the inner ring of the stator is mounted on the outer ring of the central cylinder; the rotor is rotatably connected to the central cylinder, the outer ring of the rotor is located on the outer ring of the stator, and the rotor covers the slot opening; the rotor is provided with a traction part for mounting a traction wheel; the rotor is provided with a rotor vent hole at the slot opening, and the rotor vent hole is close to the stator; the rotor ventilation hole is provided with an air guide inclined side wall which is inclined to the rotor end face of the rotor; and the rotor ventilation hole, the annular groove and the base ventilation hole are communicated. According to the scheme, the problem that the heat dissipation effect is poor due to the fact that an air path is blocked when the traction machine works is solved.

Description

Technical Field

[0001] The present invention relates to the field of traction machines, and particularly to a traction structure and a traction machine with a built-in heat dissipation function. Background Art

[0002] In the prior art, for an outer-rotor structure permanent magnet synchronous traction machine, its stator is surrounded by the rotor and the machine base, and the permanent magnets are also in a relatively enclosed space. The heat generated by the stator can only be dissipated naturally by conduction to the outside through the machine base, and the hot air inside cannot be actively discharged to the outside of the machine shell, resulting in too high a temperature of the motor and a decline in performance.

[0003] In response to this, in the prior art, a number of radial airfoils are cast on the inner end face of the rotor, ventilation holes are provided on the end face, and corresponding ventilation holes are also provided on the machine base; when the motor rotates, the airfoils drive the air flow to dissipate heat from the stator. Although this structure can reduce the temperature rise of the motor to a certain extent, there are still the following deficiencies: ① The airfoils are arranged radially at a position close to the center inside the rotor, which belongs to the design of a centrifugal fan. When the rotor rotates, a negative pressure will be formed at the root of the airfoils, and since the ventilation holes are located outside the rotor, it leads to the problem of poor air flow path; ② Some of the airfoils on the inner end face of the rotor are integrally cast with the rotor, resulting in high costs.

[0004] In addition, in the prior art, ventilation holes are directly provided on the rotor end face, and the ventilation holes are directly opposite to the stator windings. When the rotor rotates, the disturbed air cools the motor. However, the problem with this solution is that the wall of the heat dissipation hole is parallel to the rotating shaft. When the rotor rotates, the wall of the heat dissipation hole is perpendicular to the rotating surface, and the hole wall cannot guide the air to flow in a specified direction, but can only disturb the air for heat dissipation, and cannot form a large air pressure to generate a ventilation path, resulting in poor heat dissipation effect.

[0005] In summary, the existing traction machines have the problem of poor heat dissipation due to blocked air flow paths during operation. Summary of the Invention

[0006] The purpose of the present invention is to provide a traction structure with a built-in heat dissipation function, which is provided with a guiding air flow inclined side wall inclined to the rotor end face on the rotor, and a machine base ventilation hole is provided on the side of the annular groove away from the rotor, so that the heat dissipation function can be achieved only by the clockwise and counterclockwise rotation of the rotor without introducing an additional heat dissipation structure.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A traction structure with a built-in heat dissipation function, comprising: a machine base, a stator, and a rotor;

[0009] The machine base is provided with an annular groove; the annular groove exposes a groove opening at the relative front, and the machine base ventilation holes are provided on the end face side wall at the relative rear of the annular groove; a central cylinder is provided at the center of the annular groove, and the inner ring of the stator is installed on the outer ring of the central cylinder; the rotor is rotatably connected to the central cylinder, the outer ring of the rotor is located outside the outer ring of the stator, and the rotor covers the groove opening; the rotor is provided with a traction part for installing a traction wheel.

[0010] The rotor is provided with a rotor end face near the groove opening, and the rotor end face is provided with rotor ventilation holes, and the rotor ventilation holes are close to the stator; the rotor ventilation holes are provided with air guiding inclined side walls, and the air guiding inclined side walls are inclined to the rotor end face for guiding air into the rotor interior in one rotation direction and guiding the air inside the rotor out in the other rotation direction; the rotor ventilation holes, the annular groove and the machine base ventilation holes are communicated.

[0011] Optimally, the rotor is provided with a rotor inner end face, and an inner end face outer ring is provided near the annular groove on the rotor inner end face.

[0012] The inner end face outer ring abuts against the annular groove and forms a cooling channel.

[0013] The rotor ventilation holes are provided at the relative front of the cooling channel, and the machine base ventilation holes are provided at the relative rear of the cooling channel on the annular groove.

[0014] Optimally, an inner end face inner ring groove is provided at a position near the center of the rotor inner end face; the central cylinder extends into the inner end face inner ring groove.

[0015] Optimally, the central cylinder extends from the inner end face inner ring groove to the outer surface of the machine base, and reinforcing ribs are provided on the outer surface of the machine base around the central cylinder, and rib grooves are formed between the reinforcing ribs.

[0016] Optimally, some of the machine base ventilation holes, the stator and the rotor ventilation holes are horizontally aligned.

[0017] Optimally, the rotor is provided with a rotor inner end face, the rotor inner end face is connected with a rotor yoke, permanent magnets are distributed around the inner side wall of the rotor yoke, and the permanent magnets are close to the stator.

[0018] Optimally, it further includes: a first louver.

[0019] The first louver is installed on the rotor ventilation holes and blocks the rotor ventilation holes; a plurality of windows of the first louver are arranged in the same direction as the inclination direction of the air guiding inclined side wall.

[0020] Optimally, it further includes: a rotating shaft.

[0021] The rotating shaft is fixed to the rotor; the rotating shaft is rotatably connected to the central cylinder.

[0022] Optimally, it further includes: a second louver;

[0023] The second louver is installed in the ventilation hole of the machine base.

[0024] Optimally, the rotating shaft and the rotor are integrally combined.

[0025] A traction machine is provided with a traction wheel and the above-mentioned traction structure with a self-cooling function; the traction wheel is installed on the traction part.

[0026] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0027] This solution provides a traction structure with a self-cooling function. It is provided with a wind guiding inclined side wall on the rotor that is inclined to the end face of the rotor, and a ventilation hole of the machine base is provided on the side of the annular groove away from the rotor. Without introducing an additional heat dissipation structure, it can achieve the heat dissipation function only by the clockwise and counterclockwise rotation of the rotor, that is, the traction structure has a self-cooling function. When the rotor rotates, the cooling air or the hot air inside the motor can flow in a specified direction, and the cooling air or the hot air inside the motor can form wind pressure and air volume, which can effectively reduce the internal temperature of the permanent magnet synchronous traction machine and solve the problem of poor heat dissipation caused by the blocked air path during the operation of the traction machine. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of one embodiment of the traction machine;

[0029] Figure 2 It is a schematic structural diagram of one embodiment of the traction machine;

[0030] Figure 3 It is a schematic cross-sectional structural diagram of one embodiment of the traction machine;

[0031] Figure 4 It is a schematic structural diagram of one embodiment of the ventilation hole of the rotor;

[0032] Figure 5 It is a schematic partial structural diagram of one embodiment of the rotor;

[0033] Figure 6 It is a schematic structural diagram of one embodiment of the rotor;

[0034] Figure 7 It is a schematic structural diagram of one embodiment of the machine base.

[0035] Wherein:

[0036] Machine base 1, rotor 2, rotating shaft 4, stator 3; first louver 5; second louver 6; traction wheel 7;

[0037] Central column 10; annular groove 11; groove opening 12; machine base ventilation hole 13; end face side wall 14; inner end face inner annular groove 15; reinforcing rib 16; cooling channel 141; rib groove 161;

[0038] Rotor ventilation hole 20; air guiding inclined side wall 21; rotor inner end face 22; inner end face outer ring 23; permanent magnet 24; traction part 25; rotor end face 26. Specific embodiments

[0039] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0040] In the description of the present invention, 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", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or weight. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is more than two.

[0041] As Figure 1-7 , a traction structure with a self-cooling function, comprising: a machine base 1, a stator 3 and a rotor 2;

[0042] The machine base 1 is provided with an annular groove 11; the annular groove 11 exposes a groove opening 12 at the relative front, and the machine base ventilation hole 13 is provided on the end face side wall 14 at the relative rear of the annular groove 11; a central column 10 is provided at the center of the annular groove 11, and the inner ring of the stator 3 is installed on the outer ring of the central column 10; the rotor 2 is rotatably connected to the central column 10, the outer ring of the rotor 2 is located outside the outer ring of the stator 3, and the rotor 2 covers the groove opening 12; the rotor 2 is provided with a traction part 25 for installing a traction wheel 7;

[0043] The rotor 2 is provided with a rotor end face 26 near the slot opening 12. The rotor end face 26 is provided with rotor ventilation holes 20, and the rotor ventilation holes 20 are close to the stator 3. The rotor ventilation holes 20 are provided with air guiding inclined side walls 21, and the air guiding inclined side walls 21 are inclined to the rotor end face 26 for guiding air into the interior of the rotor 2 in one rotational direction and guiding the air inside the rotor 2 out in the other rotational direction. The rotor ventilation holes 20, the annular groove 11 and the frame ventilation holes 13 are communicated with each other.

[0044] This solution provides a traction structure with a self-cooling function. The air guiding inclined side wall 21 of the rotor 2 is inclined to the rotor end face 26 of the rotor 2, and the frame ventilation holes 13 are provided on the end face side wall 14 of the annular groove 11 away from the rotor 2. Without the need to introduce an additional cooling structure, the cooling function can be achieved only by the clockwise and counterclockwise rotations of the rotor 2, that is, the traction structure has a self-cooling function. When the rotor rotates, the cooling air or the hot air inside the motor can flow in a specified direction, and the cooling air or the hot air inside the motor can form wind pressure and air volume, which can effectively reduce the temperature inside the permanent magnet synchronous traction machine and solve the problem of poor heat dissipation caused by the blocked air path during the operation of the traction machine.

[0045] Specifically, the frame 1 is provided with an annular groove 11. The annular groove 11 is provided with a central column 10 near the inner ring position. The central column 10 is rotatably connected to the rotor 2 in a known manner at the inner ring. The stator 3 is arranged in the annular groove 11 and is located outside the central column 10. The inner ring of the rotor 2 is directly or indirectly connected to the central column 10 located at the inner ring of the annular groove 11, so that the outer ring of the rotor 2 remains close to the outer ring of the stator 3. The rotor 2 is provided with a traction part 25 for installing a traction wheel 7. When the rotor 2 rotates relative to the stator 3, it drives the traction wheel 7 to rotate around the central column 10. In this way, a partial area of the outer ring of the rotor 2 is arranged in the annular groove 11 and covers the slot opening 12 exposed by the annular groove 11, thereby separating the area between the annular groove 11 and the rotor 2 from the outside. And based on the relative connection relationship of the rotor 2, the stator 3 and the central column 10, the annular groove 11 is divided into a slot opening 12 in the front and a frame ventilation hole 13 in the rear. For this, as Figure 4 and Figure 5, the rotor 2 of this solution is provided with a rotor end face 26 at the opening 12 of the shielding groove. The rotor end face 26 can be on the outer surface of the rotor or the inner surface of the rotor (for example, the outer ring of the inner end face 23). The rotor end face 26 is provided with a single or multiple rotor ventilation holes 20. The rotor ventilation holes 20 are provided with air guiding inclined side walls 21. The air guiding inclined side walls 21 are inclined to the rotor end face 26 of the rotor 2; the air guiding inclined side walls 21 can be more conducive to air guiding when the rotor 2 rotates in a certain direction. Since the air guiding inclined side walls 21 are inclined to the rotor end face 26, the air can enter the annular groove 11 along the inclined direction of the air guiding inclined side walls 21 when the rotor 2 rotates; conversely, the air guiding inclined side walls 21 can also guide the air in the annular groove 11 to be discharged from the rotor end face along the air guiding inclined side walls 21 when the rotor 2 rotates in the other direction; the end face side wall 14 of the annular groove 11 is provided with a frame ventilation hole 13, which can continuously inhale the external air or discharge the air in the annular groove 11 to the outside. In this regard, by combining the structures of the stator 3 and the rotor 2 themselves and their relative positions in the annular groove 11, the traction structure of this solution can have a ventilation path corresponding to different rotation directions;

[0046] Such as Figure 1 , Figure 3 and Figure 5 , when the rotor 2 rotates counterclockwise, due to the air guiding inclined side walls 21 being inclined to the rotor end face 26, it is easier for air to enter when the rotor ventilation holes 20 rotate. The air can enter the annular groove 11 from the rotor ventilation holes 20 under the guiding action of the air guiding inclined side walls 21. The rotor 2 rotates at the groove opening 12, while the annular groove 11 is relatively stationary at the frame ventilation hole 13; thus, the pressure of the air in the annular groove 11 at the groove opening 12 increases, and the air pressure on one side of the annular groove 11 at the groove opening 12 is greater than the air pressure on the side of the frame ventilation hole 13. At this time, the air will continue to be transmitted to the gap between the stator 3 and the rotor 2 under the action of the pressure; in this way, the air will be discharged from the annular groove 11 at the frame ventilation hole 13 and take away the heat of the frame 1, the stator 3, the rotor 2, etc. during the transmission, thereby realizing the cooling function when the rotor 2 rotates counterclockwise.

[0047] Such as Figure 1 , Figure 3 and Figure 5When the rotor 2 rotates clockwise, since the air guiding inclined side wall 21 is inclined to the rotor end face 26, the air in the annular groove 11 is more likely to be discharged from the annular groove 11 through the rotor ventilation hole 20 under the guiding action of the air guiding inclined side wall 21. The rotor 2 rotates at the groove opening 12, while the annular groove 11 is relatively stationary at the frame ventilation hole 13. Therefore, the pressure of the air in the annular groove 11 at the groove opening 12 decreases. The air pressure on one side of the annular groove 11 at the groove opening 12 is less than the air pressure on the side of the frame ventilation hole 13, generating a negative pressure at the groove opening 12 of the annular groove 11, and the frame ventilation hole 13 sucks in the external air. At this time, the air will continue to be transmitted to the gap between the inner walls of the stator 3 and the rotor 2 under the action of the pressure. Thus, the air will be discharged outside the annular groove 11 at the position with the rotor ventilation hole 20 and take away the heat of the frame 1, the stator 3, the rotor 2, etc. during the transmission, thereby realizing the cooling function when the rotor 2 rotates clockwise.

[0048] In this way, this solution can achieve the heat dissipation function only by the clockwise and counterclockwise rotations of the rotor 2, solving the problem of poor heat dissipation effect caused by the blocked air path during the operation of the traction machine.

[0049] Optimally, the rotor 2 is provided with a rotor inner end face 22, and an inner end face outer ring 23 is provided at the position where the rotor inner end face 22 is close to the annular groove 11.

[0050] The inner end face outer ring 23 abuts against the annular groove 11 and forms a cooling channel 141.

[0051] The rotor 2 is provided with the rotor ventilation hole 20 at the relative front of the cooling channel 141, and the frame ventilation hole 13 is provided at the relative rear of the cooling channel 141 on the annular groove 11.

[0052] In this solution, the shapes of the annular groove 11 of the frame 1 and the rotor inner end face 22 of the rotor 2 are designed to further make the air path smoother and more stable. Specifically, Figure 3 , an inner end face outer ring 23 is provided at the position where the rotor inner end face 22 is close to the annular groove 11, and this position is far from the center of the rotor inner end face 22. When the inner end face outer ring 23 extends into the annular groove 11, the inner end face outer ring 23 can abut against the annular groove 11 infinitely, thereby forming a cooling channel 141. The cooling channel 141 is in a circular shape, one end of which is close to the rotor ventilation hole 20 and the other end is close to the frame ventilation hole 13. Under the limiting action of the inner wall on the outer periphery of the cooling channel 141, the air mainly flows between the rotor ventilation hole 20, the cooling channel 141 and the frame ventilation hole 13, and thus the air path can be made smoother and more stable.

[0053] Optimally, an inner end face inner ring groove 15 is provided at the position close to the center of the rotor inner end face 22; the central column 10 extends into the inner end face inner ring groove 15.

[0054] The central column 10 of this solution can install a rotating shaft 4 at a position near the center on the inner end face 22 of the rotor. This position is far from the annular groove 11. The rotating shaft 4 can be directly or indirectly installed on the inner ring of the central column 10 through bearings. And in this solution, an inner end face inner ring groove 15 can be provided in the area of the traction part 25 on the inner end face 22 of the rotor. The inner ring of the central column 10 extends into the inner end face inner ring groove 15, which can make the structure of the traction structure more compact. On the one hand, the distance between the rotor 2 and the inner ring of the central column 10 is shortened, so that the connection point between the rotor 2 and the central column 10 approaches the middle of the central column 10, and the rotational stability of the rotor 2 is improved. On the other hand, as Figure 3 , the cross-sectional structure diagram shows that the cooling channels 141 and the inner end face inner ring groove 15 are distributed in a "giant" shape. The air path is mainly distributed in the cooling channels 141 on the outer periphery of the inner end face inner ring groove 15. Therefore, it is possible to prevent the air path from shifting towards the inner end face inner ring groove 15, making the air path occur entirely in the cooling channels 141, and further making the air path smoother and more stable.

[0055] Optimally, the central column 10 extends from the inner end face inner ring groove 15 to the outer surface of the machine base 1. Reinforcing ribs 16 are provided on the outer surface of the machine base 1 on the outer periphery of the central column 10, and rib grooves 161 are formed between the reinforcing ribs 16.

[0056] As Figure 2 , the central column 10 is located between the inner end face inner ring groove 15 of the rotor 2 and the reinforcing ribs 16 outside the machine base 1. The central column 10 reasonably utilizes the space outside the inner end face 22 of the rotor of the machine base 1, making both the traction structure more compact and the center of gravity of the central column 10 closer to the center. At the same time, the vacated rib grooves 161 can be used to cool the area of the central column 10, that is, the stator 3 can also utilize the rib grooves 161 for cooling on the inner ring. The stator 3 is cooled by air on the inner ring. The traction structure of this solution has a multi-faceted cooling mechanism.

[0057] Optimally, part of the machine base ventilation holes 13, the stator 3, and the rotor ventilation holes 20 are horizontally aligned.

[0058] When the machine base ventilation holes 13, the stator 3, and the rotor ventilation holes 20 are horizontally aligned, under the action of pressure, air mainly flows linearly between the machine base ventilation holes 13, the stator 3, and the rotor ventilation holes 20. The distance between the machine base ventilation holes 13 and the rotor ventilation holes 20 is the shortest, the air path is smoother and more stable, and the heat between the rotor 2 and the stator 3 can be taken away by air faster.

[0059] Optimally, the rotor 2 is provided with an inner end face 22 of the rotor. The inner end face 22 of the rotor is connected to a rotor yoke. The permanent magnets 24 are distributed around the inner side wall of the rotor yoke, and the permanent magnets 24 are close to the stator 3.

[0060] The permanent magnet 24 is located on the inner wall of the rotor yoke at the outer ring of the inner end face 22 of the rotor. The stator 3 is close to the permanent magnet 24. Air can flow between the stator 3 and the rotor 2, and the air passage is smooth.

[0061] Optimally, it further includes: a first louver 5;

[0062] The first louver 5 is installed in the rotor ventilation hole 20 and blocks the rotor ventilation hole 20; the plurality of windows of the first louver 5 are arranged in the same direction as the inclination direction of the air guiding inclined side wall 21.

[0063] The first louver 5 can be used to block the rotor ventilation hole 20, thereby blocking the air guiding inclined side wall 21 and preventing the air guiding inclined side wall 21 from being exposed on the outer surface of the rotor 2. On the one hand, it can prevent foreign objects from entering the rotor 2 through the rotor ventilation hole 20 during the rotation of the rotor 2 and its traction wheel 7, thus avoiding the accumulation of foreign objects inside the traction structure after long-term use. On the other hand, according to common knowledge, the first louver 5 has a plurality of windows, and this solution cleverly utilizes the multi-window structure of the louver. The plurality of windows of the first louver 5 are arranged in the same direction as the inclination direction of the air guiding inclined side wall 21. Only the plurality of windows of the first louver 5 are exposed from the rotor ventilation hole 20. The flow rate of the incoming and outgoing air can be controlled by processing the size and quantity of the windows. Instead of using the entire rotor ventilation hole 20, using the plurality of windows of the first louver 5 can form a plurality of windows in the same direction as the air guiding inclined side wall 21 in the rotor ventilation hole 20, so as to use the plurality of inclined windows to introduce or discharge air. The air can more easily enter and exit during the rotation of the rotor 2, thereby improving the air fluidity.

[0064] Among them, the relationship between the plurality of windows of the first louver 5 and the inclination direction of the air guiding inclined side wall 21 is the same or opposite direction, and it does not specifically refer to that the orientation of the window is absolutely consistent with the angle of the air guiding inclined side wall 21. As long as the general orientation of the window is approximately the same as the inclination angle of the air guiding inclined side wall 21.

[0065] The first louver 5 is detachably installed in the rotor ventilation hole 20.

[0066] The first louver 5 of this solution can be designed into a structure with any number, shape and position of windows according to needs, so as to control the air flow situation at the inlet and outlet of the traction structure to better cooperate with the rotation of the rotor 2; Therefore, this solution preferably detachably installs the first louver 5 in the rotor ventilation hole 20. The installation methods such as screw fixation, magnetic attraction fixation, snap fixation, etc., as long as the first louver 5 can be detachably installed.

[0067] This solution can install a rotating shaft 4 in the rotor 2 or omit the rotating shaft 4 according to needs, and the installation method can be carried out according to the existing technology;

[0068] Optimally, it further includes: a rotating shaft 4;

[0069] The rotating shaft 4 is fixed to the rotor 2; the rotating shaft 4 is rotatably connected to the central column 10.

[0070] For the embodiment with the added rotating shaft 4, in this solution, the rotating shaft 4 is installed on the rotor 2, which can be the inner ring of the rotor 2, and the rotating shaft 4 can be directly or indirectly fixed to the rotor 2; for example, in one embodiment, the rotating shaft 4 is integrally formed with the rotor 2; for example, in one embodiment, the rotating shaft 4 can be connected to the rotor 2 through a bearing. The rotating shaft 4 is rotatably connected to the central column 10, and it can be connected to a bearing in the inner hole of the central column.

[0071] Optimally, the rotating shaft 4 and the rotor 2 are integrally combined. In addition to being assembled separately, the rotating shaft 4 and the rotor 2 of this solution can also be integrally combined; specifically, the integral combination, for example, is integral casting; in this way, the structure of the rotating shaft 4 and the rotor 2 is simple, and there is no need to additionally process a shaft for fitting, saving costs.

[0072] Optimally, it further includes: a second louver 6;

[0073] The second louver 6 is installed in the machine base ventilation hole 13.

[0074] The function of the second louver 6 in this solution is similar to that of the first louver 5, and it also has the function of preventing foreign objects; the difference between the second louver 6 and the first louver 5 is that the second louver 6 covers the entire machine base ventilation hole 13, and only communicates with the outside through its window, so the air intake and exhaust per unit time are limited; since the pressure generation is mainly concentrated at the groove opening 12 of the annular groove 11, when a negative pressure is generated in the annular groove 11, only a limited number of windows of the second louver 6 suck in air, avoiding the air flowing in too quickly and causing the negative pressure in the annular groove 11 to be unstable, and further avoiding the air flowing in too quickly and affecting the cooling function of the rotor 2 when rotating clockwise.

[0075] A traction machine is provided with a traction wheel 7 and the above-mentioned traction structure with a self-cooling function; the traction wheel 7 is installed on the traction part 25.

[0076] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that: various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A traction structure with self-heating function, characterized in that: include: Frame, stator and rotor; The base is provided with an annular groove; the annular groove exposes a groove opening at the relatively front side, and the annular groove is provided with a base ventilation hole at the end surface side wall at the relatively rear side; a central column is provided at the center of the annular groove, and the inner ring of the stator is mounted on the outer ring of the central column; the rotor is rotatably connected to the central column, the outer ring of the rotor is located on the outer ring of the stator, and the rotor covers the groove opening; the rotor is provided with a traction part for mounting a traction wheel; The rotor is provided with a rotor end face near the slot opening, and the rotor end face is provided with a rotor ventilation hole, and the rotor ventilation hole is close to the stator; the rotor ventilation hole is provided with an air-guiding inclined side wall, and the air-guiding inclined side wall is inclined to the rotor end face, and is used to introduce air into the interior of the rotor in one rotation direction and to guide the air out of the interior of the rotor in the other rotation direction; the rotor ventilation hole, the annular groove and the base ventilation hole are connected.

2. A traction structure with self-heat dissipation function according to claim 1, characterized in that: The rotor is provided with a rotor inner end surface, and the rotor inner end surface is provided with an inner end surface outer ring near the annular groove; The inner end surface outer ring is against the annular groove and forms a cooling channel; The rotor is provided with the rotor ventilation hole at the front side relative to the cooling channel, and the annular groove is provided with the base ventilation hole at the rear side relative to the cooling channel.

3. A traction structure with self-heat dissipation function according to claim 2, characterized in that: The inner end surface of the rotor is provided with an inner end surface inner ring groove near the center; the central column extends into the inner end surface inner ring groove.

4. The traction structure with self-heat dissipation function according to claim 3, characterized in that: The central column extends from the inner annular groove of the inner end surface to the outer surface of the machine base. The outer surface of the machine base is provided with reinforcing ribs at the outer periphery of the central column, and rib grooves are formed between the reinforcing ribs.

5. The traction structure with self-heat dissipation function according to claim 2, characterized in that: Some of the base ventilation holes, stator ventilation holes and rotor ventilation holes are horizontally aligned.

6. The traction structure with self-heat dissipation function according to claim 1, characterized in that: The rotor is provided with a rotor inner end surface, the rotor inner end surface is connected to a rotor yoke, the permanent magnets are distributed around the inner side wall of the rotor yoke, and the permanent magnets are close to the stator.

7. The traction structure with self-heat dissipation function according to claim 1, characterized in that: Also includes: first and second shutters; The first shutter is installed on the rotor ventilation hole to cover the rotor ventilation hole; The plurality of windows of the first louver are arranged in the same direction as the inclination direction of the wind guide oblique side wall; The second shutter is installed on the ventilation hole of the machine base.

8. A traction structure with self-heat dissipation function according to any one of claims 1 to 7, characterized in that: Also includes: Rotating shaft; The rotating shaft is fixed to the rotor; the rotating shaft is rotatably connected to the central column.

9. The traction structure with self-heat dissipation function according to claim 8, characterized in that: The rotating shaft and the rotor are integrated into one piece.

10. A traction machine, characterized in that: A traction wheel and a traction structure with a self-heating function as claimed in any one of claims 1 to 9 are provided; the traction wheel is installed on the traction part.

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