Outer rotor winding motor capable of realizing multi-turn continuous winding

Abstract

The invention relates to the technical field of motors, and discloses an outer rotor winding motor capable of multi-turn continuous winding, which comprises a base, a motor shaft is rotatably connected in the base, the motor shaft is coaxially and fixedly connected with a casing, an outer rotor iron core is fixedly connected to the inner wall of the casing, and a plurality of first open slots are formed in the inner side of the outer rotor iron core at intervals in the circumferential direction of the outer rotor iron core. One end, relatively close to the axis of the outer rotor iron core, of the first open slot penetrates through the outer rotor iron core in the radial direction, and the first open slot is used for arranging a coil of an outer rotor winding; the outer rotor winding is electrically connected with a first control assembly used for adjusting current or voltage of the outer rotor winding. A stator shaft is fixedly connected in the machine base, an inner stator iron core is fixedly connected to the position, opposite to the outer rotor, of the outer circumferential face of the stator shaft in a sleeving mode, and a plurality of second coil opening grooves used for arranging inner stator windings are formed in the outer side of the inner stator iron core in the circumferential direction at intervals. According to the invention, the parameter design range of the motor can be expanded for adjustment and optimization, thereby adapting to more operation conditions and load requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an outer rotor winding motor capable of winding multiple turns. Background Art

[0002] The wound rotor motor is a motor commonly used in high-power applications. The rotor current can be adjusted by an external power supply, so its starting torque can be large, which is particularly suitable for heavy-load starting. The traditional wound rotor motor generally adopts the structure of an outer stator 1 and an inner rotor 2. The inner rotor 2 includes an iron core and a winding. The inner rotor winding is usually set to be a hard wire winding directly formed by flat sintered copper wire, which has good conductivity and mechanical strength; the coil of the inner rotor winding is wound in the core slot 4 of the inner rotor core 3. Due to the centrifugal force of the inner rotor 2, in order to better fix the inner rotor winding in the inner rotor core slot 4, as shown in FIG. Figure 1 As shown, the core slots 4 of the inner rotor core 3 are usually set as closed slots, and the inner rotor winding is a hard wire winding. The inner rotor winding adopts an inserted hard wire coil structure inserted and assembled in the closed slot. Therefore, the inner rotor winding cannot form a complete coil at the end during manufacturing. Figure 2 As shown, the inserted hard wire coil 5 needs to be fixed to the core slot 4 of the inner rotor before the end coil 6 can be used for end welding to form a complete coil. Due to the limitation of welding amount and process difficulty, the number of turns of the hard wire coil 5 cannot be too many. The hard wire coil 5 is generally a single turn or two turns, which leads to a limited range of motor design parameters that are difficult to adjust and optimize, and is not easy to adapt to different operating conditions and load requirements. Summary of the invention

[0003] In view of this, the present invention provides an outer rotor wound motor that can be wound with multiple turns to solve the problem that the existing wound rotor motor has a limited design parameter range and is difficult to adjust and optimize, resulting in inconvenience in adapting to different operating conditions and load requirements.

[0004] The present invention provides an outer rotor winding motor capable of winding multiple turns, comprising:

[0005] Machine base;

[0006] A motor shaft is rotatably connected to the base;

[0007] A stator shaft is fixedly connected to the base;

[0008] A housing, coaxially and fixedly connected to the motor shaft;

[0009] An outer rotor, comprising an outer rotor core and an outer rotor winding, wherein the outer rotor core is fixedly connected to the inner wall of the housing, a plurality of first opening slots are arranged at intervals along the circumference of the outer rotor core on the inner side of the outer rotor core, the first opening slots are arranged to penetrate the outer rotor core in the radial direction at one end relatively close to the axis of the outer rotor core, and the first opening slots are used to arrange the coils of the outer rotor winding;

[0010] a first control component, electrically connected to the outer rotor winding, the first control component being used to adjust the current or voltage of the outer rotor;

[0011] The inner stator comprises an inner stator core and an inner stator winding. The inner stator core is fixedly sleeved on the outer circumferential surface of the stator shaft and arranged opposite to the outer rotor. A plurality of second opening slots are arranged at intervals along the circumference of the inner stator core on the outer side of the inner stator core. The second opening slots are arranged to penetrate radially of the inner stator core at one end relatively far away from the axis of the inner stator core. The second opening slots are used to set the coils of the inner stator winding. The inner stator winding is electrically connected to a second control component, and the second control component is used to adjust the current or voltage of the inner stator. The inner stator is used to generate a rotating magnetic field when energized.

[0012] An outer rotor wound motor capable of winding multiple turns according to the present invention has at least the following beneficial effects:

[0013] By arranging a plurality of first opening slots on the inner side of the outer rotor core, and the inward end of the first opening slot is arranged to penetrate along the radial direction of the outer rotor core, a complete hard wire coil can be directly nested into the first opening slot from the inner side of the outer rotor core to complete the assembly. Therefore, the coil of the outer rotor winding can directly form a complete coil during production, without the need to fix the coil in the first opening slot and then weld the end portion. The assembly process is simple, and the coil of the outer rotor winding can be made into multiple turns, thereby expanding the voltage adjustment range of the first control component to the outer rotor, thereby expanding the parameter design range of the motor, and thus adapting to more operating conditions and load requirements. At the same time, by A plurality of second open slots are arranged on the outside of the stator core, and the outward ends of the second open slots are arranged to penetrate radially of the inner stator core, so that the complete hard wire coil is directly nested from the outside of the inner stator core into the second open slots to complete the assembly. Therefore, the coil of the inner stator winding can directly form a complete coil during production, without the need to fix the coil in the second open slot and then weld the end. The assembly and fixing process is simple, and the coil of the inner stator winding can be made into multiple turns, thereby expanding the voltage adjustment range of the inner stator by the second control component, thereby expanding the parameter design range of the motor of this embodiment for adjustment and optimization, and thus adapting to more operating conditions and load requirements.

[0014] In an optional embodiment, the portion of the outer rotor winding extending axially to the outside of the outer rotor core is configured as a mounting end, and the end surface of the mounting end relatively close to the inner wall of the casing is bonded to the inner wall of the casing by epoxy adhesive.

[0015] In an optional embodiment, a water channel is arranged in a spiral shape along the axial direction inside the stator shaft, the water channel is arranged opposite to the inner stator, the water channel is used for coolant to flow through, one end of the water channel along the axial direction is connected to a water inlet pipe, and the other end of the water channel along the axial direction is connected to a water outlet pipe.

[0016] In an optional embodiment, the stator shaft includes a first part and a second part, the outer circumference of the first part is provided with a water flow groove in a spiral shape along the axial direction, and the first part is interference fit in the second part; the water flow groove and the inner circumference of the second part form the water channel.

[0017] In an optional embodiment, the second control component is arranged on an outer side wall of the machine base along the axial direction, one end of the stator shaft relatively close to the second control component extends to the outside of the machine base, and a first threading hole is axially arranged in the middle inner part, and a second threading hole is radially arranged on the outer wall of the stator shaft, and the second threading hole is connected to the first threading hole; the second control component is electrically connected to the inner stator winding through a first lead wire, and the first lead wire passes through the first threading hole and the second threading hole in sequence.

[0018] In an optional embodiment, the stator shaft is coaxially penetrated by an inner hole in the axial direction, the motor shaft is coaxially clearance-fitted in the inner hole, the two ends of the motor shaft in the axial direction extend outside the inner hole, and are rotatably connected to the side wall of the base through a first bearing; the housing includes a connecting plate coaxially connected to the outer peripheral surface of the motor shaft, the connecting plate is axially relatively close to the end face of the inner stator and is protruding with a mounting tube, and the outer rotor core is arranged on the inner wall of the mounting tube.

[0019] In an optional embodiment, the outer rotor winding is electrically connected to the first control component through a collector ring carbon brush assembly, and the collector ring carbon brush assembly includes a collector ring and a carbon brush. The collector ring is fixedly sleeved on the outer circumferential surface of the motor shaft and is located on a side of the connecting plate relatively away from the mounting tube. The carbon brush is connected to the inner wall of the machine base through a brush holder.

[0020] In an optional embodiment, one end of the machine base which is axially relatively close to the collector ring carbon brush assembly is detachably connected to an end cover via bolts.

[0021] In an optional embodiment, the casing includes a cylinder, the outer rotor core is arranged on the inner wall of the cylinder, and the cylinder is respectively provided with a first connecting flange and a second connecting flange at both ends along the axial direction, the first connecting flange is rotatably connected to the stator shaft through a second bearing; the second connecting flange is coaxially provided with a mounting plate on the end face relatively close to the first connecting flange, and the mounting plate is rotatably connected to the end of the stator shaft through a third bearing; the motor shaft is coaxially connected to the end face of the second connecting flange relatively far away from the first connecting flange.

[0022] In an optional embodiment, the outer rotor winding is electrically connected to the first control component through a collector ring carbon brush assembly, the collector ring carbon brush assembly includes a collector ring and a carbon brush, the collector ring is fixedly sleeved on the outer circumferential surface of the motor shaft, and the carbon brush is connected to the inner wall of the machine base through a brush holder; one end of the machine base axially relatively close to the collector ring carbon brush assembly is detachably connected to an end cover by bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a wound rotor motor in the prior art;

[0025] Figure 2 It is a partial structural schematic diagram of an inserted coil fixed to an iron core slot of an inner rotor in a wound rotor motor of the prior art;

[0026] Figure 3 It is a structural schematic diagram of a first embodiment of the present invention;

[0027] Figure 4 for Figure 3 A schematic diagram of a partial structure of

[0028] Figure 5 It is a structural schematic diagram of a second embodiment of the present invention;

[0029] Figure 6 for Figure 5 A schematic diagram of a partial structure of

[0030] Figure 7 Schematic diagram of the assembly of the outer rotor core and the inner stator core in an embodiment of the present invention;

[0031] Figure 8It is a partial schematic diagram of the outer rotor winding being assembled in the first open slot in an embodiment of the present invention;

[0032] Fig. 9 It is a partial schematic diagram of the inner stator winding in the embodiment of the present invention being assembled in the second open slot.

[0033] Description of reference numerals:

[0034] 1-external stator, 2-inner rotor, 3-inner rotor core, 4-core slot, 5-inserted hard wire coil, 6-end coil

[0035] 100-machine base, 110-end cover, 120-third threading hole, 130-first hole;

[0036] 200-motor shaft, 210-first bearing, 220-output end;

[0037] 300-stator shaft, 310-water channel, 320-water inlet pipe, 330-water outlet pipe, 340-first part, 341-first threading hole, 342-second threading hole, 343-inner hole, 344-water inlet interface, 345-water outlet interface, 346-first channel, 347-second channel, 350-second part;

[0038] 400- housing, 410- connecting plate, 420- mounting cylinder, 421- guide groove, 430- cylinder, 440- first connecting flange, 441- second bearing, 450- second connecting flange, 451- mounting plate, 452- third bearing;

[0039] 500 - outer rotor, 510 - outer rotor core, 511 - first opening slot, 520 - outer rotor winding, 521 - mounting end, 522 - epoxy adhesive;

[0040] 600-first control assembly, 610-second lead wire;

[0041] 700 - inner stator, 710 - inner stator core, 711 - second open slot, 720 - inner stator winding;

[0042] 800-second control assembly, 810-first lead wire;

[0043] 910-collector ring, 920-carbon brush, 930-brush holder. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this embodiment 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 cannot be understood as limiting this embodiment. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of this embodiment, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0047] Combine the following Figures 3 to 9 , describing an embodiment of the present invention.

[0048] According to an embodiment of the present invention, an outer rotor winding motor capable of winding multiple turns is provided, comprising a base 100 and an outer rotor 500, wherein a motor shaft 200 is rotatably connected inside the base 100, and the motor shaft 200 is coaxially fixedly connected to a housing 400, and the outer rotor 500 comprises an outer rotor core 510 and an outer rotor winding 520, wherein the outer rotor core 510 is fixedly connected to the inner wall of the housing 400, and a plurality of first opening slots 511 are arranged at intervals along the circumference of the outer rotor core 510 on the inner side of the outer rotor core 510, wherein the first opening slot 511 is arranged to penetrate the outer rotor core 510 in the radial direction at one end thereof relatively close to the axis of the outer rotor core 510, and the first opening slot 511 is used to arrange the coil of the outer rotor winding 520; the outer rotor winding 520 is electrically connected to a first control component 600, and the first control component 600 is used to adjust the current or voltage of the outer rotor 500. pressure; a stator shaft 300 is fixedly connected to the base 100, and an inner stator 700 is fixedly sleeved on the outer circumference of the stator shaft 300. The inner stator 700 is arranged opposite to the outer rotor 500 and is used to generate a rotating magnetic field when energized; the inner stator 700 includes an inner stator core 710 and an inner stator winding 720, the inner stator core 710 is fixedly sleeved on the outer circumference of the stator shaft 300, and a plurality of second opening slots 711 are arranged at intervals along the circumference of the inner stator core 710 on the outer side of the inner stator core 710, and the second opening slots 711 are arranged to penetrate the inner stator core 710 in the radial direction at one end relatively away from the axis of the inner stator core 710, and the second opening slots 711 are used to set the coils of the inner stator winding 720; the inner stator winding 720 is electrically connected to a second control component 800, and the second control component 800 is used to adjust the current or voltage of the inner stator 700.

[0049] The multi-turn winding motor of this embodiment is provided with a plurality of first opening slots 511 on the inner side of the outer rotor core 510, and the inward end of the first opening slot 511 is provided to penetrate along the radial direction of the outer rotor core 510. Figure 8 As shown, the complete hard wire coil can be directly nested from the inner side of the outer rotor core 510 into the first open slot 511 to complete the assembly. Therefore, the coil of the outer rotor winding 520 can be directly formed into a complete coil during production, without the need to fix the coil to the first open slot 511 and then weld the end. The assembly process is simple, and the coil of the outer rotor winding 520 can be made into multiple turns, expanding the voltage adjustment range of the first control component 600 to the outer rotor 500, thereby expanding the parameter design range of the motor of this embodiment for adjustment and optimization, and thus adapting to more operating conditions and load requirements. At the same time, a plurality of second open slots 711 are provided on the outer side of the inner stator core 710, and the outward end of the second open slot 711 is provided to penetrate the inner stator core 710 radially, as shown in FIG. Fig. 9As shown, the complete hard wire coil is directly nested from the outside of the inner stator core 710 into the second open slot 711 to complete the assembly. Therefore, the coil of the inner stator winding 720 can be directly formed into a complete coil during production, and there is no need to fix the coil in the second open slot 711 and then weld the end. The assembly and fixing process is simple, and the coil of the inner stator winding 720 can be made into multiple turns, expanding the voltage adjustment range of the second control component 800 to the inner stator 700, thereby expanding the parameter design range of the motor of this embodiment for adjustment and optimization, and then adapting to more operating conditions and load requirements.

[0050] It should be noted that, because the centrifugal force borne by the outer rotor 500 when rotating is directed outward along the radial direction of the outer rotor core 510, the stability of the coil of the outer rotor winding 520 disposed in the first opening slot 511 open inwardly is basically not affected by the centrifugal force, and is not prone to breakage or damage. Because the inner stator 700 is fixed and does not rotate, there is no centrifugal force, so the second opening slot 711 located in the inner stator core 710 is open at one end facing inwardly, which does not affect the stability of the coil installation of the inner stator winding 720.

[0051] It is understandable that the coil of the outer rotor winding 520 can be made into multiple turns, so that the outer rotor winding 520 and the first control component 600 are better matched, and the induced voltage generated by the conductor of the outer rotor 500 can be changed in a wide range according to the number of series turns per phase, thereby changing the current of the outer rotor winding 520 in a wide range, thereby adapting to more operating conditions and load requirements. The coil of the inner stator winding 720 can be made into multiple turns, so that the inner stator winding 720 and the second control component 800 are better matched, and the current of the inner stator winding 720 can be changed in a wide range according to the number of series turns per phase, thereby adapting to more operating conditions and load requirements.

[0052] It should be noted that the output torque process of the multi-turn winding motor in this embodiment is as follows: the external power supply energizes the inner stator 700 to generate a rotating magnetic field, the coil in the outer rotor winding 520 cuts the rotating magnetic field generated by the inner stator 700 to form an induced current, and the outer rotor winding 520 generates an induced magnetic field while generating an induced current. The induced magnetic field generated by the outer rotor winding 520 interacts with the rotating magnetic field generated by the inner stator 700 to generate an electromagnetic torque, so that the motor shaft 200 rotates with the outer rotor 500 and the housing 400 to output torque.

[0053] The speed regulation process of the multi-turn winding motor of this embodiment is as follows: the first control component 600 adjusts the voltage delivered by the external power supply to the outer rotor winding 520 to change the magnitude of the induced current of the outer rotor 500, thereby adjusting the magnitude of the electromagnetic torque generated by the interaction between the induced magnetic field generated by the outer rotor winding 520 and the rotating magnetic field generated by the inner stator 700, thereby controlling the motor shaft 200 to output at different speeds to achieve the speed regulation function. The second control component 800 can also adjust the voltage delivered by the external power supply to the inner stator winding 720 to change the magnitude of the current delivered to the inner stator 700, thereby adjusting the magnitude of the electromagnetic torque generated by the interaction between the rotating magnetic field generated by the inner stator 700 and the induced magnetic field generated by the outer rotor winding 520, thereby controlling the motor shaft 200 to output at different speeds to achieve the speed regulation function.

[0054] It can be understood that the motor shaft 200, the stator shaft 300, the housing 400, the outer rotor 500 and the inner stator 700 are coaxially arranged, and the axial directions of the five are in the same direction; the axial direction mentioned in the text refers to the axial direction of the motor shaft 200. For the convenience of description, this embodiment is based on Figure 3 or Figure 5 The axial direction shown in FIG. 2 is used as an illustration of the axial direction of the motor shaft 200 , but should not be understood as a clear limitation on the axial direction of the motor shaft 200 .

[0055] like Figure 3 and Figure 5 As shown, specifically, the portion of the outer rotor winding 520 extending axially to the outside of the outer rotor core 510 is set as a mounting end 521, and the end surface of the mounting end 521 relatively close to the inner wall of the housing 400 is bonded to the inner wall of the housing 400 by epoxy glue 522. The mounting end 521 is fixed by the epoxy glue 522, and support points are generated at both ends of the outer rotor winding 520, thereby reducing the centrifugal force received during rotation.

[0056] The first control component 600 adjusts the motor output speed by adjusting the current or voltage transmitted from the external power supply to the outer rotor winding 520 according to the actual needs of the load; specifically, the first control component 600 includes a variable resistor or a frequency converter. The second control component 800 adjusts the motor output speed by adjusting the current or voltage transmitted from the external power supply to the inner stator winding 720 according to the actual needs of the load; specifically, the second control component 800 includes a variable resistor or a frequency converter.

[0057] In some embodiments, a water channel 310 is spirally arranged axially inside the stator shaft 300. The water channel 310 is arranged opposite to the inner stator 700. The water channel 310 is used for coolant to flow through. One end of the water channel 310 along the axial direction is connected to a water inlet pipe 320, and the other end of the water channel 310 along the axial direction is connected to a water outlet pipe 330. By providing a water channel 310 for the coolant to circulate in the stator shaft 300, the specific heat capacity of the coolant is large, and the inner stator 700 is directly in direct contact with the outer peripheral surface of the stator shaft 300 provided with the water channel 310, so that the coolant flowing through the water channel 310 directly takes away the heat of the inner stator 700, making the heat dissipation effect more prominent; at the same time, the water channel 310 is connected to the water inlet pipe 320 and the water outlet pipe 330 at both ends along the axial direction, so that the coolant flowing in from the water inlet pipe 320 can flow through the entire spirally arranged water channel 310 and then flow out through the water outlet pipe 330, so as to ensure that the coolant keeps a static circulation state and flows through the entire water channel 310 on the basis of reducing the flow resistance of the coolant flowing through the water channel 310, thereby improving the heat dissipation and cooling effect of the inner stator 700. In specific applications, the coolant can be a water-cooled liquid.

[0058] like Figure 4 and Figure 6 As shown, specifically, one end of the water channel 310 communicating with the water inlet pipe 320 is set as a liquid inlet end, and one end of the water channel 310 communicating with the water outlet pipe 330 is set as a liquid outlet end; one end of the stator shaft 300 along the axial direction is respectively provided with a water inlet interface 344 and a water outlet interface 345, and the water inlet interface 344 and the water outlet interface 345 are arranged opposite to each other along the radial direction of the stator shaft 300, and the water inlet interface 344 is communicated with the liquid inlet end of the water channel 310 through an L-shaped first channel 346, and the water inlet interface 344 is used to connect the water inlet pipe 320; the water outlet interface 345 is connected to the water inlet end of the water channel 310. The liquid outlet end of the water channel 310 is connected through an L-shaped second channel 347, and the water outlet interface 345 is used to connect the water outlet pipe 330; by arranging the water inlet interface 344 and the water outlet interface 345 on the same side of the stator shaft 300 along the axial direction, the water inlet pipe 320 and the water outlet pipe 330 can be arranged in parallel on the same side of the stator shaft 300 along the axial direction, so that the water inlet pipe 320 and the water outlet pipe 330 are conveniently placed side by side in a vacuum pipe for insulation treatment, which reduces heat leakage to a certain extent and facilitates rapid cooling of the inner stator 700.

[0059] Specifically, the stator shaft 300 includes a first portion 340 and a second portion 350. The outer circumference of the first portion 340 is provided with a water flow groove in a spiral shape along the axial direction. The first portion 340 is interference-fitted in the second portion 350. The water flow groove and the inner circumference of the second portion 350 form the water channel 310. The stator shaft 300 is divided into the first portion 340 and the second portion 350, and the two portions are combined into one body by interference fitting, so that the water channel 310 is machined in the stator shaft 300.

[0060] It should be noted that, because the coolant maintains a static circulation state while flowing through the entire water channel 310, the impact force applied to the inner wall of the water flow channel during the coolant circulation through the water channel 310 is almost negligible, so that no axial misalignment will occur between the first part 340 and the second part 350 of the interference fit.

[0061] Specifically, the connection points at both ends of the first part 340 and the second part 350 are sealed by welding to ensure the sealing of the water channel 310 .

[0062] like Figure 4 and Figure 6 As shown, specifically, the axial dimension of the water channel 310 is larger than the axial dimension of the inner stator core 710, so that the coolant circulating through the water channel 310 can basically exchange heat with various positions of the inner stator core 710 along the axial direction, and fully take away the heat of the inner stator core 710, which is beneficial to improving the heat dissipation and cooling effect of the inner stator 700.

[0063] like Figure 5 and Figure 6 As shown, specifically, the second control component 800 is arranged on an outer side wall of the base 100 along the axial direction, and one end of the stator shaft 300 relatively close to the second control component 800 extends to the outside of the base 100, and a first threading hole 341 is axially arranged in the middle inner part, and a second threading hole 342 is radially arranged on the outer wall of the stator shaft 300, and the second threading hole 342 is connected with the first threading hole 341; the second control component 800 is electrically connected to the inner stator winding 720 through the first lead wire 810, and the first lead wire 810 passes through the first threading hole 341 and the second threading hole 342 in sequence. The first threading hole 341 and the second threading hole 342 are used to conceal the first lead wire 810 for embedding, which helps to reduce the probability of the first lead wire 810 being damaged or torn off from the outside. As shown Figure 3 and Figure 4 As shown, in another replaceable scheme of the present embodiment, the second control component 800 is arranged on an outer side wall of the base 100 along the axial direction, and the second control component 800 is electrically connected to the inner stator winding 720 through the first lead wire 810; a third threading hole 120 is formed axially through the side wall of the base 100 corresponding to the position of the second control component 800, and the third threading hole 120 is used for the first lead wire 810 to pass through.

[0064] Specifically, one end of the motor shaft 200 which is relatively far away from the second control assembly 800 along the axial direction extends to the outside of the base 100 to form an output end 220 .

[0065] like Figure 3 and Figure 4As shown, in some embodiments, the stator shaft 300 is coaxially penetrated to form an inner hole 343 in the axial direction, the motor shaft 200 is coaxially fitted in the inner hole 343, the two ends of the motor shaft 200 in the axial direction extend to the outside of the inner hole 343, and are rotatably connected to the side wall of the base 100 through the first bearing 210; the housing 400 includes a connecting plate 410 coaxially connected to the outer peripheral surface of the motor shaft 200, and the end surface of the connecting plate 410 relatively close to the inner stator 700 in the axial direction is convexly provided with a mounting cylinder 420, and the outer rotor core 510 is arranged on the inner wall of the mounting cylinder 420. Firstly, the two side walls of the base 100 in the axial direction respectively support the two ends of the motor shaft 200 in the axial direction, so as to improve the rotation stability of the motor shaft 200; and the housing 400 with one end open in the axial direction is formed by using the mounting cylinder 420 and the connecting plate 410, so that the outer rotor 500 arranged on the inner wall of the housing 400 is more convenient for heat dissipation.

[0066] like Figure 3 As shown, specifically, a plurality of guide grooves 421 are provided on the outer peripheral surface of the mounting cylinder 420 at intervals along the axial direction, the guide grooves 421 are arranged opposite to the outer rotor core 510, and the guide grooves 421 are arranged around the circumference of the mounting cylinder 420; so that when the mounting cylinder 420 rotates together with the motor shaft 200, the air flows in the guide grooves 421 and carries away the heat of the outer rotor core 510 which is in direct contact with the inner wall of the mounting cylinder 420.

[0067] In order to further improve the heat dissipation efficiency of the motor of this embodiment, specifically, the inner wall and the outer wall of the base 100 are both provided with heat dissipation ribs.

[0068] like Figure 3 As shown, specifically, the outer rotor winding 520 is electrically connected to the first control assembly 600 through a collector ring carbon brush assembly, and the collector ring carbon brush assembly includes a collector ring 910 and a carbon brush 920. The collector ring 910 is fixedly sleeved on the outer peripheral surface of the motor shaft 200 and is located on the side of the connecting plate 410 relatively far away from the mounting tube 420, and the carbon brush 920 is connected to the inner wall of the base 100 through a brush holder 930. By coaxially fixing the collector ring 910 to the motor shaft 200, the collector ring 910 and the outer rotor 500 rotate synchronously without differential speed, ensuring that the wires electrically connecting the collector ring 910 and the outer rotor winding 520 are not easily torn off; and the collector ring carbon brush assembly is arranged on the side of the connecting plate 410 relatively far away from the mounting tube 420, so that the collector ring carbon brush assembly and the outer rotor 500 and the inner stator 700 are arranged in different spaces along the axial direction, which is conducive to more efficient heat dissipation and improves the service life of components.

[0069] Specifically, one end of the machine base 100 which is axially relatively close to the collector ring carbon brush assembly is detachably connected to an end cover 110 via bolts. The end cover 110 protects components such as the collector ring 910 and the carbon brush 920 located in the machine base 100, and the end cover 110 can be removed when the collector ring 910 and the carbon brush 920 need to be repaired and replaced.

[0070] Specifically, the first control component 600 is arranged at the outer top of the base 100, and the carbon brush 920 is electrically connected to the first control component 600 through the second lead wire 610. A first hole 130 is penetrated through the top of the base 100 corresponding to the position of the first control component 600, and the first hole 130 is used for the second lead wire 610 to pass through, thereby simplifying the assembly difficulty.

[0071] like Figure 5 and Figure 6 As shown, in some embodiments, the housing 400 includes a cylinder 430, the outer rotor core 510 is arranged on the inner wall of the cylinder 430, and the cylinder 430 is respectively provided with a first connecting flange 440 and a second connecting flange 450 at both ends along the axial direction, and the first connecting flange 440 is rotatably connected to the stator shaft 300 through a second bearing 441; the second connecting flange 450 is coaxially convexly provided with a mounting plate 451 on the end face relatively close to the first connecting flange 440, and the mounting plate 451 is rotatably connected to the end of the stator shaft 300 through a third bearing 452; the motor shaft 200 is coaxially connected to the end face of the second connecting flange 450 relatively far away from the first connecting flange 440. By rotatably connecting the first connecting flange 440 and the second connecting flange 450 of the casing 400 to the stator shaft 300 through the second bearing 441 and the third bearing 452 respectively, and then coaxially fixing the motor shaft 200 to the casing 400, the stator shaft 300 and the motor shaft 200 are arranged in different spaces along the axial direction, so that the structure of the motor of this embodiment is more compact and the assembly is easier.

[0072] like Figure 5As shown, specifically, the outer rotor winding 520 is electrically connected to the first control component 600 through a collector ring carbon brush assembly, and the collector ring carbon brush assembly includes a collector ring 910 and a carbon brush 920, the collector ring 910 is fixedly sleeved on the outer peripheral surface of the motor shaft 200, and the carbon brush 920 is connected to the inner wall of the base 100 through a brush holder 930; the base 100 is relatively close to the collector ring carbon brush assembly along the axial direction. The end cover 110 is detachably connected by bolts. During the assembly process, the end cover 110 can be removed first, the stator shaft 300 can be fixed in the base 100, and then the collector ring carbon brush assembly and the motor shaft 200 can be assembled, and then the housing 400 can be rotated and assembled on the stator shaft 300, and finally the end cover 110 can be assembled to complete the motor assembly of this embodiment, and the assembly is more simplified.

[0073] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended invention.

Claims

1. An outer rotor wound motor capable of winding multiple turns, characterized in that: include: A machine base (100); A motor shaft (200) is rotatably connected to the base (100); A stator shaft (300) is fixedly connected to the base (100); A housing (400) coaxially and fixedly connected to the motor shaft (200); An outer rotor (500), comprising an outer rotor core (510) and an outer rotor winding (520), wherein the outer rotor core (510) is fixedly connected to the inner wall of the housing (400), and a plurality of first opening slots (511) are arranged at intervals along the circumference of the outer rotor core (510) on the inner side of the outer rotor core (510), wherein one end of the first opening slot (511) is relatively close to the axis of the outer rotor core (510) and is arranged to penetrate in the radial direction of the outer rotor core (510), and the first opening slots (511) are used to arrange the coils of the outer rotor winding (520); a first control component (600), electrically connected to the outer rotor winding (520), the first control component (600) being used to adjust the current or voltage of the outer rotor (500); The inner stator (700) comprises an inner stator core (710) and an inner stator winding (720). The inner stator core (710) is fixedly sleeved on the outer circumferential surface of the stator shaft (300) and arranged opposite to the outer rotor (500). The outer side of the inner stator core (710) is provided with a plurality of second opening slots (711) at intervals along the circumference of the inner stator core (710). One end of the second opening slot (711) which is relatively far away from the axis of the inner stator core (710) is arranged to penetrate along the radial direction of the inner stator core (710). The second opening slot (711) is used to set the coil of the inner stator winding (720). The inner stator winding (720) is electrically connected to a second control component (800), and the second control component (800) is used to adjust the current or voltage of the inner stator (700). The inner stator (700) is used to generate a rotating magnetic field when energized.

2. The outer rotor wound motor capable of multiple turns according to claim 1, characterized in that: The portion of the outer rotor winding (520) extending axially to the outside of the outer rotor core (510) is provided as a mounting end portion (521), and the end surface of the mounting end portion (521) relatively close to the inner wall of the housing (400) is bonded to the inner wall of the housing (400) by epoxy glue (522).

3. An outer rotor wound motor capable of multiple turns according to claim 1 or 2, characterized in that: A water channel (310) is arranged in a spiral shape along the axial direction inside the stator shaft (300). The water channel (310) is arranged opposite to the inner stator (700). The water channel (310) is used for allowing coolant to flow through. One end of the water channel (310) along the axial direction is connected to a water inlet pipe (320), and the other end of the water channel (310) along the axial direction is connected to a water outlet pipe (330).

4. The outer rotor wound motor capable of multiple turns according to claim 3, characterized in that: The stator shaft (300) comprises a first part (340) and a second part (350); the outer circumferential surface of the first part (340) is provided with a water flow groove in a spiral shape along the axial direction; the first part (340) is interference fit in the second part (350); the water flow groove and the inner circumferential surface of the second part (350) form the water channel (310).

5. An outer rotor wound motor capable of multiple turns according to claim 1 or 2, characterized in that: The second control component (800) is arranged on an outer side wall of the machine base (100) along the axial direction, and one end of the stator shaft (300) relatively close to the second control component (800) extends to the outside of the machine base (100), and a first threading hole (341) is axially arranged in the middle part, and a second threading hole (342) is arranged on the outer wall of the stator shaft (300) along the radial direction of the stator shaft (300), and the second threading hole (342) is connected with the first threading hole (341); the second control component (800) is electrically connected to the inner stator winding (720) through a first lead wire (810), and the first lead wire (810) passes through the first threading hole (341) and the second threading hole (342) in sequence.

6. The outer rotor wound motor capable of multiple turns according to claim 3, characterized in that: The stator shaft (300) is coaxially penetrated to form an inner hole (343) in the axial direction, and the motor shaft (200) is coaxially fitted in the inner hole (343). Both ends of the motor shaft (200) in the axial direction extend to the outside of the inner hole (343) and are rotatably connected to the side wall of the base (100) through a first bearing (210); the housing (400) includes a connecting plate (410) coaxially connected to the outer peripheral surface of the motor shaft (200), and the end surface of the connecting plate (410) is convexly provided with a mounting tube (420) in the axial direction and relatively close to the inner stator (700), and the outer rotor core (510) is arranged on the inner wall of the mounting tube (420).

7. The outer rotor wound motor capable of multiple turns according to claim 6, characterized in that: The outer rotor winding (520) is electrically connected to the first control component (600) via a collector ring carbon brush assembly, wherein the collector ring carbon brush assembly comprises a collector ring (910) and a carbon brush (920), wherein the collector ring (910) is fixedly sleeved on the outer peripheral surface of the motor shaft (200) and is located on a side of the connecting plate (410) relatively away from the mounting tube (420), and the carbon brush (920) is connected to the inner wall of the machine base (100) via a brush holder (930).

8. The outer rotor wound motor capable of multiple turns according to claim 7, characterized in that: One end of the machine base (100) which is relatively close to the collector ring carbon brush assembly in the axial direction is detachably connected to an end cover (110) via bolts.

9. The outer rotor wound motor capable of multiple turns according to claim 3, characterized in that: The housing (400) comprises a cylinder (430), the outer rotor core (510) is arranged on the inner wall of the cylinder (430), and the cylinder (430) is respectively provided with a first connecting flange (440) and a second connecting flange (450) at two ends along the axial direction, the first connecting flange (440) is rotatably connected to the stator shaft (300) via a second bearing (441); the second connecting flange (450) is coaxially provided with a mounting plate (451) on the end surface relatively close to the first connecting flange (440), and the mounting plate (451) is rotatably connected to the end of the stator shaft (300) via a third bearing (452); the motor shaft (200) is coaxially connected to the end surface of the second connecting flange (450) relatively far from the first connecting flange (440).

10. The outer rotor wound motor capable of multiple turns according to claim 9, characterized in that: The outer rotor winding (520) is electrically connected to the first control component (600) via a collector ring carbon brush assembly, wherein the collector ring carbon brush assembly comprises a collector ring (910) and a carbon brush (920), wherein the collector ring (910) is fixedly sleeved on the outer peripheral surface of the motor shaft (200), and the carbon brush (920) is connected to the inner wall of the base (100) via a brush holder (930); an end of the base (100) relatively close to the collector ring carbon brush assembly in the axial direction is detachably connected to an end cover (110) via bolts.

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