Alternating current and direct current high-voltage and low-voltage shared motor

Abstract

The invention discloses an AC / DC high-voltage and low-voltage shared motor, which relates to the technical field of motors and comprises a motor body, and the motor body comprises a rear shell, a stator ring, a coil assembly, a rotor assembly, an intermediate shaft, a low-voltage electric brush assembly, a high-voltage electric brush assembly, a first commutator, a second commutator and two fixing frames. Wherein an identification circuit used for identifying the high-voltage and low-voltage power supply is arranged in the rear shell. The motor can adapt to alternating-current, high-voltage and direct-current and low-voltage alternating-current and direct-current, so that the motor can adapt to various power supplies, the application range of the motor is widened, meanwhile, the motor is provided with two different rotors, namely the outer ring sleeve and the inner ring sleeve, the outer ring sleeve is used at high voltage, and the inner ring sleeve is used at low voltage; (if the same rotor is used, a low-voltage power supply may not drive the rotor, or the rotating speed of the rotor is lower than that of the rotor under a high-voltage power supply), so that the output efficiency of the invention is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an AC / DC high-voltage and low-voltage common motor. Background Art

[0002] In today's electrical product motor field, micro series motors and DC motors are widely used.

[0003] A search revealed a patent document with publication number CN217198367U, which discloses an AC / DC motor based on a low-resistance, high-conductivity coil. The motor comprises a motor housing, a protective shell, a heat sink, a filter, a transmission rod, a first cooling fan, a bearing, a rotor, a rotor winding, a second cooling fan, and a stator. The patent has the following beneficial effects: the transmission rod is connected to bearings at both ends and fixedly connected to the inner ring of the bearing. The bearings are all-ceramic, which reduces the resistance between the transmission rod and the motor housing, allowing the transmission rod to rotate rapidly within the motor housing. The rotor and stator are both made of silicon steel sheets to form an integral structure, with insulating pads provided between adjacent silicon steel sheets. The rotor and stator windings are both made of high-purity copper material with low resistance and high conductivity. The high-purity copper material reduces the resistance of the coil and makes it highly conductive. Insulating pads are provided between adjacent silicon steel sheets to prevent eddy currents from forming in the windings.

[0004] However, the above invention has the following shortcomings: AC and DC motors are motors that can pass both AC and DC currents. AC and DC motors are generally designed for high-voltage currents, that is, general AC and DC motors can only adapt to one voltage or one power supply method, which brings many inconveniences in actual use; taking an inflatable bed as an example, a high-voltage motor (generally 100-220V) is required in indoor environments, while a low-voltage motor must be used outdoors (for example, some cars have an output power supply of 12V); this forces people to purchase two sets of motors in order to meet the needs of different indoor and outdoor scenarios, which not only causes a serious waste of resources, but also greatly increases the cost of use. Summary of the Invention

[0005] The object of the present invention is to provide a motor for AC and DC high voltage and low voltage, so as to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: an AC / DC high-voltage and low-voltage common motor, comprising a motor body, wherein the motor body comprises a rear housing, a stator ring, a coil assembly, a rotor assembly, an intermediate shaft, a low-voltage brush assembly, a high-voltage brush assembly, a first commutator, a second commutator, and two fixing frames; The rear housing includes an identification circuit for identifying high-voltage and low-voltage power supplies. The stator coil is fixed to two mounting brackets at each end. Two semi-circular permanent magnets are fixed to the interior of the stator coil, one of which is fixed to the rear housing. The intermediate shaft is rotatably mounted on the two mounting brackets at both ends. The rotor assembly includes an outer ring and an inner ring disposed within the outer ring. Both the outer ring and the inner ring are sleeved on the intermediate shaft. First and second connecting mechanisms are provided on opposing ends of the outer and inner rings, respectively, to drive the intermediate shaft. A first commutator and a second commutator are disposed on the first and second connecting mechanisms, respectively. A low-voltage brush assembly and a high-voltage brush assembly are disposed on the two mounting brackets, respectively. The coil assembly includes a low-voltage coil and a high-voltage coil. The low-voltage coil is wound around the outer ring and electrically connected to the first commutator, while the high-voltage coil is wound around the outer ring and electrically connected to the second commutator. The low-voltage brush assembly directs low-voltage direct current to the first commutator, while the high-voltage brush assembly directs low-voltage direct current to the second commutator.

[0007] Preferably, an insulating layer is provided on the outer side of the inner sleeve.

[0008] Preferably, the high-voltage brush and the low-voltage brush have the same structure and both include two conductive plates, two conductive posts, two first springs and two carbon brushes. The two conductive plates are respectively fixed on both sides of the fixed frame, one end of the conductive post is fixed on the conductive plate, the carbon brush is slidably sleeved on the conductive post, and the carbon brush is slidably inserted in the socket, the first spring is sleeved on the conductive post, and the carbon brushes on the two fixed frames are in contact with the first commutator and the second commutator respectively by means of the elastic force of the first spring.

[0009] Preferably, the first connecting mechanism includes a first cylindrical sleeve, the second connecting mechanism includes a second cylindrical sleeve, the first cylindrical sleeve is coaxially fixed with the outer ring sleeve, the second cylindrical sleeve is coaxially fixed with the inner ring sleeve, the intermediate shaft includes an output shaft and a small-diameter shaft coaxially arranged therewith, the first cylindrical sleeve and the second cylindrical sleeve are both sleeved on the small-diameter shaft, a first bearing is provided between the first cylindrical sleeve and the small-diameter shaft to enable the two to rotate relative to each other, and a first bearing is provided between the second cylindrical sleeve and the small-diameter shaft to enable the two to rotate relative to each other.

[0010] Preferably, the first bearing and the second bearing are both one-way bearings.

[0011] Preferably, the identification circuit includes a single-wire circuit, a single-pole double-throw switch and a second rectifier bridge, one of the carbon brushes in the low-voltage brush group and one of the carbon brushes in the high-voltage brush group are respectively connected to the first input circuit and the second input circuit, another carbon brush in the low-voltage brush group and another carbon brush in the high-voltage brush group are respectively connected to the first output circuit and the second output circuit, one end of the first input circuit and the second input circuit are respectively placed on both sides of the single-pole double-throw switch and are both equipped with interfaces compatible with the single-pole double-throw switch, the positive output end of the first rectifier bridge is connected to the single-pole double-throw switch, the two AC input ends of the first rectifier bridge are both installed on the single-wire circuit through wires, one end of the first output circuit and one end of the second output circuit are both connected to the negative input end of the first rectifier bridge, and diode No. 1 and diode No. 2 are respectively installed on the first output circuit and the second output circuit.

[0012] Preferably, the identification circuit also includes a second rectifier bridge, a PPTC protector, a first load resistor, a second load resistor, a first electromagnet and a second electromagnet. The two AC input ends of the second rectifier bridge are installed on a single-line circuit through wires. The first load resistor, the second load resistor and the second rectifier bridge are connected in series. The PPTC protector and the first electromagnet are connected in series and then connected in parallel with the first load resistor. The second electromagnet is connected in parallel with the second load resistor. The first electromagnet and the second electromagnet are respectively arranged on both sides of the single-pole double-throw switch, and the blades of the single-pole double-throw switch are fixed with armatures on both sides. The blades of the single-pole double-throw switch are fixed with a third spring, and one end of the third spring is fixed on the rear shell.

[0013] The present invention provides a motor that can be used for both AC and DC high-voltage and low-voltage applications. Compared with the prior art, the present invention has the following beneficial effects: First, the present invention can adapt to both AC, high-voltage, and DC power, as well as low-voltage AC and DC power. Therefore, the present invention can adapt to a variety of power sources, expanding the scope of application of the present invention. Furthermore, the present invention has two different rotors, namely an outer ring and an inner ring, with the outer ring used for high voltage and the inner ring used for low voltage. (If the same rotor is used, the low-voltage power source may not be able to drive the rotor, or the rotor speed may be lower than the rotor speed under the high-voltage power source), thereby ensuring the output efficiency of the present invention. Secondly, the present invention is provided with an identification circuit, which can automatically identify the high-voltage power supply and the low-voltage power supply, and the identification circuit can convert alternating current into direct current to prevent the high-voltage power supply from being misconnected with the low-voltage brush group or the low-voltage power supply from being misconnected with the high-voltage brush group (if the high-voltage power supply and the low-voltage brush group are misconnected, the low-voltage coil on the inner ring will be overloaded and burned; if the low-voltage power supply and the high-voltage brush group are misconnected, the current of the high-voltage coil on the outer ring will be too small, so that the outer ring cannot rotate normally), thereby ensuring that the motor body can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the explosion structure of the electronic body of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing frame of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the rotor assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the conductive sheet, the conductive column, the first spring and the carbon brush of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the stator ring and the permanent magnet of the present invention; Figure 7 This is a schematic diagram of the intermediate shaft structure of the present invention; Figure 8 This is a schematic diagram of the exploded three-dimensional structure of the rotor assembly of the present invention; Figure 9 Schematic diagram of the three-dimensional structure of the outer ring of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the inner ring of the present invention; Figure 11 Schematic diagram of the identification circuit of the present invention.

[0016] Reference numerals: 1. Rear housing; 2. Motor body; 3. High-voltage brush set; 4. Low-voltage brush set; 5. Stator ring; 6. Permanent magnet; 7. Coil set; 8. Intermediate shaft; 9. First commutator; 10. Fixing bracket; 11. Socket; 12. Rotor assembly; 13. Carbon brush; 14. Conductive sheet; 15. Conductive column; 16. First spring; 17. Output shaft; 18. Small diameter shaft; 19. No. 1 diode; 20. First bearing; 21. External 1. Sleeve; 22. First cylindrical sleeve; 23. Inner sleeve; 24. Second cylindrical sleeve; 25. Second bearing; 26. Armature; 27. Single-pole double-throw switch; 28. Second commutator; 29. ​​Second diode; 30. Single-wire circuit; 31. First rectifier bridge; 32. First load resistor; 33. PPTC protector; 34. First electromagnet; 35. Second load resistor; 36. Second electromagnet; 37. Second rectifier bridge. DETAILED DESCRIPTION

[0017] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] The present invention provides an AC / DC high-voltage and low-voltage common motor through improvement. The technical solution of the present invention is: like Figures 1 to 11 As shown, an embodiment of the present invention provides an AC / DC high-voltage and low-voltage common motor, comprising a motor body 2, the motor body 2 including a rear housing 1, a stator ring 5, a coil assembly 7, a rotor assembly 12, an intermediate shaft 8, a low-voltage brush assembly 4, a high-voltage brush assembly 3, a first commutator 9, a second commutator 28, and two fixing frames 10; Among them, the material of the back shell 1 is made of insulating material. In order to prevent leakage, an identification circuit for identifying high-voltage and low-voltage power supplies is provided inside the back shell 1; Figure 6 As shown, the two ends of the stator ring 5 are fixed to two fixing frames 10 respectively, and two semi-circular permanent magnets 6 are fixed inside the stator ring 5. The stator ring 5 and the permanent magnet 6 are mainly based on the existing motor design. The material of the stator ring 5 is not limited. One of the fixing frames 10 is fixed on the rear shell 1; Figure 1 As shown, both ends of the intermediate shaft 8 are rotatably mounted on two fixing frames 10. It can be seen that the intermediate shaft 8 rotates axially between the two fixing frames 10. Figure 8 As shown, the rotor assembly 12 includes an outer ring 21 and an inner ring 23 disposed within the outer ring 21. The outer ring 21 and the inner ring 23 can rotate relative to each other, and both the outer ring 21 and the inner ring 23 are sleeved on the intermediate shaft 8. The opposite ends of the outer ring 21 and the inner ring 23 are provided with a first connecting mechanism and a second connecting mechanism capable of driving the intermediate shaft 8; Figure 4 As shown, the first commutator 9 and the second commutator 28 are respectively arranged on the first connecting mechanism and the second connecting mechanism; Figure 1 As shown, the low-voltage brush set 4 and the high-voltage brush set 3 are respectively arranged on two fixing frames 10; Figure 1 and Figure 2As shown, the coil assembly 7 includes a low-voltage coil and a high-voltage coil. The low-voltage coil is wound around an outer bezel 21 and electrically connected to the first commutator 9. The high-voltage coil is wound around the outer bezel 21 and electrically connected to the second commutator 28. Further details are provided for the outer bezel 21 and inner bezel 23. Both the outer bezel 21 and the inner bezel 23 have winding holes. The winding method of the low-voltage and high-voltage coils is consistent with that of the internal coils in conventional motors. The low-voltage brush assembly 4 introduces low-voltage DC power into the first commutator 9, and the high-voltage brush assembly 3 introduces low-voltage DC power into the second commutator 28. As can be seen from the above, the present invention has two different rotors, namely the outer bezel 21 and the inner bezel 23. The outer bezel 21 is used for high voltage and the inner bezel 23 is used for low voltage. If the same rotor is used, the low-voltage power supply may not be able to drive the rotor, or the rotor speed may be lower than the rotor speed under the high-voltage power supply, thereby ensuring the output efficiency of the present invention.

[0019] Furthermore, combined with Figure 11 As shown, an insulating layer is provided on the outside of the inner bezel 23. To further explain the insulating layer, a tin foil layer (which may also be other materials for shielding or isolating the magnetic field, which is not limited here) is embedded inside the insulating layer to shield the magnetic field. The outer side of the insulating layer can be made of a material that can isolate the current. The coils on the outer bezel 21 or the inner bezel 23 can generate a magnetic field when energized. When one of the coils rotates around the central axis, the other coil cuts the magnetic field of the rotating coil, thereby generating an induced current and forming a magnetic reactance, thereby increasing the energy consumed by the output. The insulating layer can prevent this from happening.

[0020] Furthermore, combined with Figure 5 As shown, the high-voltage brush and the low-voltage brush have the same structure and both include two conductive sheets 14, two conductive posts 15, two first springs 16 and two carbon brushes 13. The two conductive sheets 14 are respectively fixed on both sides of the fixing frame 10, one end of the conductive post 15 is fixed on the conductive sheet 14, the carbon brush 13 is slidably sleeved on the conductive post 15, and the carbon brush 13 is slidably inserted into the socket 11, the first spring 16 is sleeved on the conductive post 15, and the carbon brushes 13 on the two fixing frames 10 are respectively in contact with the first commutator 9 and the second commutator 28 by the elastic force of the first spring 16; it can be seen from the above that the carbon brushes 13 are respectively in contact with the first commutator 9 by the elastic force of the first spring 16. When the carbon brushes 13 are worn, the carbon brushes 13 will be pushed out a distance by the first spring 16, thereby ensuring that the carbon brushes 13 on the two fixing frames 10 can always be in contact with the corresponding first commutator 9 and second commutator 28.

[0021] Furthermore, combined with Figure 8-10As shown, the first connecting mechanism includes a first cylindrical sleeve 22, and the second connecting mechanism includes a second cylindrical sleeve 24. The first cylindrical sleeve 22 is coaxially fixed to the outer ring sleeve 21, and the second cylindrical sleeve 24 is coaxially fixed to the inner ring sleeve 23. The intermediate shaft 8 includes an output shaft 17 and a small-diameter shaft 18 arranged coaxially therewith. The first cylindrical sleeve 22 and the second cylindrical sleeve 24 are both sleeved on the small-diameter shaft 18. A first bearing 20 is provided between the first cylindrical sleeve 22 and the small-diameter shaft 18 to enable relative rotation between the two, and a second bearing 25 is provided between the second cylindrical sleeve 24 and the small-diameter shaft 18 to enable relative rotation between the two. From the above description, it can be seen that: the outer ring sleeve 21 rotates the central shaft through the first cylindrical sleeve 22 and the first bearing 20. Similarly, the inner ring sleeve 23 rotates the central shaft through the second cylindrical sleeve 24 and the first bearing 20.

[0022] Furthermore, combined with Figure 8 and attached Figure 10 As shown, the first bearing 20 and the second bearing 25 are both one-way bearings. When a ratchet mechanism is provided between the inner and outer rings of the one-way bearing (this mechanism is prior art), for example, when the outer ring of the one-way bearing rotates clockwise (clockwise is just an example here), the outer ring of the one-way bearing can drive the inner ring of the one-way bearing to rotate, but the clockwise rotation of the inner ring of the one-way bearing cannot drive the outer ring of the one-way bearing. In this way, the outer ring sleeve 21 can be ensured to rotate clockwise, and the outer ring sleeve 21 can drive the central axis to rotate through the first bearing 20. The inner ring of the second bearing 25 rotates with the central axis, but the inner ring of the second bearing 25 cannot drive the inner ring sleeve 23 fixed to the outer ring of the second bearing 25 to rotate. Similarly, when the inner sleeve rotates, the outer ring sleeve 21 cannot rotate, thereby ensuring that the two can rotate relative to each other, reducing the load when the outer ring sleeve 21 or the inner ring sleeve 23 rotates.

[0023] Furthermore, combined with Figure 11 As shown, the identification circuit includes a single-line circuit 30, a single-pole double-throw switch 27 and a second rectifier bridge 37. One of the carbon brushes 13 in the low-voltage brush group 4 and one of the carbon brushes 13 in the high-voltage brush group 3 are respectively connected to the first input circuit and the second input circuit, another carbon brush 13 in the low-voltage brush group 4 and another carbon brush 13 in the high-voltage brush group 3 are respectively connected to the first output circuit and the second output circuit, one end of the first input circuit and the second input circuit are respectively placed on both sides of the single-pole double-throw switch 27 and are both equipped with interfaces adapted to the single-pole double-throw switch 27, the positive output end of the first rectifier bridge 31 is connected to the single-pole double-throw switch 27, the two AC input ends of the first rectifier bridge 31 are both installed on the single-line circuit 30 through wires, one end of the first output circuit and one end of the second output circuit are both connected to the negative input end of the first rectifier bridge 31, and a first diode 19 and a second diode 29 are respectively installed on the first output circuit and the second output circuit; it can be seen from the above description that, Figure 11It can be seen that the first rectifier bridge 31 is a full bridge, so when AC power enters, the first rectifier bridge 31 can convert AC power into continuous DC power and introduce DC power into the single-pole double-throw switch 27. When the single-pole double-throw switch 27 is connected to one of the interfaces, the current is introduced into the circuit corresponding to the interface; the first diode 19 and the second diode 29 are used to prevent the positive current from flowing in, thereby ensuring the unidirectionality of the current output; the identification circuit also includes a second rectifier bridge 37, a PPTC protector 33, a first load resistor 32, a second load resistor 35, a first electromagnet 34 and a second electromagnet 36. The two AC inputs of the second rectifier bridge 37 The input ends are installed on the single-line circuit 30 through wires, the first load resistor 32, the second load resistor 35 and the second rectifier bridge 37 are connected in series, the PPTC protector 33 and the first electromagnet 34 are connected in series and in parallel with the first load resistor 32, the second electromagnet 36 is connected in parallel with the second load resistor 35, the first electromagnet 34 and the second electromagnet 36 are respectively arranged on both sides of the single-pole double-throw switch 27, and the blades of the single-pole double-throw switch 27 are fixed with armatures 26 on both sides, and the blades of the single-pole double-throw switch 27 are fixed with third springs, one end of the third spring is fixed on the rear shell 1; here, the first load resistor 32 and The resistance value of the second load resistor 35 is consistent; here is a supplementary explanation of the first electromagnet 34 and the second electromagnet 36. The number of coils on the first electromagnet 34 is much larger than the number of coils on the second electromagnet 36. It can be seen from the above description that the second rectifier bridge 37 is also a full bridge, so when AC enters, the second rectifier bridge 37 can convert AC into continuous DC. When low-voltage AC and DC are entered, the current of the DC is small, and the PPTC protector 33 does not work. Since the number of coils on the first electromagnet 34 is much larger than the number of coils on the second electromagnet 36, the magnetic force generated by the second electromagnet 36 is greater than that of the first electromagnet 34, and the first electromagnet 34 The single-pole double-throw switch 27 is attracted, and the single-pole double-throw switch 27 is connected to the interface on the first input circuit, and the low-voltage current flowing out of the first rectifier bridge 31 is introduced into the first input circuit. At this time, the low-voltage brush group 4 works; when high-voltage AC and DC power enters, the current of the DC power is large, and the PPTC protector 33 works, cutting off the current flowing into the first electromagnet 34. As a result, only the second electromagnet 36 works, and the second electromagnet 36 attracts the single-pole double-throw switch 27, and the single-pole double-throw switch 27 is connected to the interface on the second input circuit, and the high-voltage current flowing out of the first rectifier bridge 31 is introduced into the second input circuit. At this time, the high-voltage brush group 3 works.

[0024] Working principle: Connect the power supply to the single-wire circuit 30 of the identification circuit (sockets can be installed at both ends of the single-wire circuit 30). When low-voltage AC or DC power is input, the current of the AC or DC power is small, and the PPTC protector 33 does not work. Since the number of coils on the first electromagnet 34 is much larger than the number of coils on the second electromagnet 36, the magnetic force generated by the second electromagnet 36 is greater than that of the first electromagnet 34. The first electromagnet 34 attracts the single-pole double-throw switch 27, and the single-pole double-throw switch 27 is connected to the interface on the first input circuit, and the first rectifier bridge The low-voltage current flowing out of 31 is introduced into the first input circuit, and the low-voltage brush group 4 is working at this time; when high-voltage AC or DC power enters, the current of the AC or DC power is large, and the PPTC protector 33 is activated, cutting off the current flowing into the first electromagnet 34. As a result, only the second electromagnet 36 is working, and the second electromagnet 36 attracts the single-pole double-throw switch 27. The single-pole double-throw switch 27 is connected to the interface on the second input circuit, and the high-voltage current flowing out of the first rectifier bridge 31 is introduced into the second input circuit. At this time, the high-voltage brush group 3 is working; If low-voltage AC / DC power is supplied, the low-voltage brush assembly 4 operates, and current is drawn into the second commutator 28 connected to the low-voltage coil. The inner ring 23, wound with the low-voltage coil, rotates in the magnetic field of the permanent magnet 6. Since the second bearing 25 is provided and the second bearing 25 is a one-way bearing, the inner ring 23 drives the central shaft to rotate via the one-way bearing, while the outer ring 21 does not rotate. Similarly, if high-voltage AC / DC power is supplied, the outer ring 21 drives the central shaft to rotate via the first bearing 20, while the inner ring 23 does not rotate.

[0025] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An AC / DC high-voltage and low-voltage common motor, comprising a motor body (2), characterized in that: The motor body (2) comprises a rear housing (1), a stator ring (5), a coil assembly (7), a rotor assembly (12), an intermediate shaft (8), a low-voltage brush assembly (4), a high-voltage brush assembly (3), a first commutator (9), a second commutator (28) and two fixing frames (10); The rear housing (1) is provided with an identification circuit for identifying high-voltage and low-voltage power supplies; the two ends of the stator ring (5) are respectively fixed to two fixing frames (10); two semi-circular permanent magnets (6) are fixed inside the stator ring (5); one of the fixing frames (10) is fixed on the rear housing (1); the two ends of the intermediate shaft (8) are rotatably mounted on the two fixing frames (10); the rotor assembly (12) comprises an outer ring sleeve (21) and an inner ring sleeve (23) arranged inside the outer ring sleeve (21); the outer ring sleeve (21) and the inner ring sleeve (23) are both sleeved on the intermediate shaft (8); and opposite ends of the outer ring sleeve (21) and the inner ring sleeve (23) are both provided with a driving mechanism capable of driving the intermediate shaft (8). A first connecting mechanism and a second connecting mechanism of the intermediate shaft (8); the first commutator (9) and the second commutator (28) are respectively arranged on the first connecting mechanism and the second connecting mechanism; the low-voltage brush group (4) and the high-voltage brush group (3) are respectively arranged on two fixing frames (10); the coil group (7) includes a low-voltage coil and a high-voltage coil, the low-voltage coil is wound on the outer ring (21) and is electrically connected to the first commutator (9), the high-voltage coil is wound on the outer ring (21) and is electrically connected to the second commutator (28), the low-voltage brush group (4) introduces low-voltage direct current into the first commutator (9), and the high-voltage brush group (3) introduces low-voltage direct current into the second commutator (28).

2. The AC / DC high-voltage and low-voltage common motor according to claim 1, characterized in that: An insulating layer is provided on the outer side of the inner sleeve (23).

3. The AC / DC high-voltage and low-voltage common motor according to claim 1, characterized in that: The high-voltage brush and the low-voltage brush have the same structure and both include two conductive sheets (14), two conductive columns (15), two first springs (16) and two carbon brushes (13). The two conductive sheets (14) are respectively fixed on both sides of a fixed frame (10), one end of the conductive column (15) is fixed on the conductive sheet (14), the carbon brush (13) is slidably sleeved on the conductive column (15), and the carbon brush (13) is slidably inserted into the socket (11), the first spring (16) is sleeved on the conductive column (15), and the carbon brushes (13) on the two fixed frames (10) are in contact with the first commutator (9) and the second commutator (28) respectively by means of the elastic force of the first spring (16).

4. The AC / DC high-voltage and low-voltage common motor according to claim 1, characterized in that: The first connecting mechanism comprises a first cylindrical sleeve (22), and the second connecting mechanism comprises a second cylindrical sleeve (24). The first cylindrical sleeve (22) is coaxially fixed to the outer ring sleeve (21), and the second cylindrical sleeve (24) is coaxially fixed to the inner ring sleeve (23). The intermediate shaft (8) comprises an output shaft (17) and a small-diameter shaft (18) coaxially arranged therewith. The first cylindrical sleeve (22) and the second cylindrical sleeve (24) are both sleeved on the small-diameter shaft (18). A first bearing (20) is arranged between the first cylindrical sleeve (22) and the small-diameter shaft (18) to enable the two to rotate relative to each other, and a second bearing (25) is arranged between the second cylindrical sleeve (24) and the small-diameter shaft (18) to enable the two to rotate relative to each other.

5. The AC / DC high-voltage and low-voltage common motor according to claim 4, characterized in that: The first bearing (20) and the second bearing (25) are both one-way bearings.

6. The AC / DC high-voltage and low-voltage common motor according to claim 1, characterized in that: The identification circuit comprises a single-line circuit (30), a single-pole double-throw switch (27) and a second rectifier bridge (37); one of the carbon brushes (13) in the low-voltage brush set (4) and one of the carbon brushes (13) in the high-voltage brush set (3) are respectively connected to a first input circuit and a second input circuit; another of the carbon brushes (13) in the low-voltage brush set (4) and another of the carbon brushes (13) in the high-voltage brush set (3) are respectively connected to a first output circuit and a second output circuit; one end of the first input circuit and the second input circuit are respectively placed on the single-pole double-throw switch (27); Interfaces compatible with the single-pole double-throw switch (27) are installed on both sides of the switch (27), the positive output end of the first rectifier bridge (31) is connected to the single-pole double-throw switch (27), the two AC input ends of the first rectifier bridge (31) are installed on the single-line circuit (30) through wires, one end of the first output circuit and one end of the second output circuit are connected to the negative input end of the first rectifier bridge (31), and a first diode (19) and a second diode (29) are installed on the first output circuit and the second output circuit respectively.

7. The AC / DC high-voltage and low-voltage common motor according to claim 6, characterized in that: The identification circuit further comprises a second rectifier bridge (37), a PPTC protector (33), a first load resistor (32), a second load resistor (35), a first electromagnet (34) and a second electromagnet (36); the two AC input terminals of the second rectifier bridge (37) are both mounted on the single-line circuit (30) via electric wires; the first load resistor (32), the second load resistor (35) and the second rectifier bridge (37) are connected in series; the PPTC protector (33) and the first electromagnet (34) are connected in series and are connected in parallel with the first load resistor (32); the second electromagnet (36) and the second load resistor (35) are connected in parallel; the first electromagnet (34) and the second electromagnet (36) are respectively arranged on both sides of a single-pole double-throw switch (27); armatures (26) are fixed on both sides of a blade of the single-pole double-throw switch (27); the blade of the single-pole double-throw switch (27) is fixed with a third spring, and one end of the third spring is fixed to the rear housing (1).

Images