A cast copper rotor for electric motor

Abstract

The present invention relates to the technical field of rotors, and more specifically to a cast copper rotor of an electric motor, comprising an outer shell, an inner wall of the outer shell being connected to a connecting rod, the connecting rod being connected to a cylindrical ring, an oil delivery mechanism being connected next to the connecting rod, a first air charging pipe being arranged inside the oil delivery mechanism, the first air charging pipe being connected to a blower, one end of the blower being connected to an air outlet pipe, the air outlet pipe being connected to a water delivery mechanism, a first water outlet, a second water outlet and a water inlet being arranged on the top, the pipe ports being respectively connected to a central groove inside the cylindrical ring, a rotating shaft being arranged at the center of the cylindrical ring, a central shaft being arranged at the center of the rotating shaft, a planetary gear set design being adopted inside the rotor to avoid large-area contact of the internal rotor with the gear, the central shaft of the rotor driving the large gear to rotate, and the central shaft and the large gear being directly inserted, so as to have high transmission efficiency, and secondly, a small contact area between the large gear and the small gear, so as to have high transmission efficiency, so as to avoid the phenomenon of high internal temperature of the electric motor due to severe friction during rotation.

Description

Technical Field

[0001] The invention relates to the technical field of rotors, in particular to a cast copper rotor for an electric motor. Background Art

[0002] The cast copper rotor is a new type of motor rotor with copper as the conductive matrix. The conductivity of copper is about 40% higher than that of aluminum. Using cast copper rotors to replace the widely used cast aluminum rotors in three-phase asynchronous motors can significantly reduce the total loss of the motor, thereby improving the overall efficiency of the motor. For the motor rotor currently used, since the rotor inside the motor rotates with a shaft, when the output end of the shaft is overloaded, continuous operation will cause the shaft inside the rotor to overheat, which may burn the motor. In addition, during the rotation of the motor, impurities will appear inside, affecting the service life of the motor. Summary of the invention

[0003] In view of the problems in the prior art, the present invention provides a cast copper rotor for an electric motor, which solves the problem that, for the currently used electric motor rotor, since the rotor inside the motor rotates using a rotating shaft, when the load at the output end of the rotating shaft is too large, continuous operation will cause the rotating shaft inside the rotor to be too high, which may burn the motor. In addition, during the rotation of the motor, impurities will appear inside, affecting the service life of the motor.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a cast copper rotor of an electric motor, comprising a shell, the inner wall of the shell is connected to a connecting rod, the connecting rod is connected to a cylindrical ring, an oil delivery mechanism is connected to the connecting rod, a first air filling pipe is arranged inside the oil delivery mechanism, the first air filling pipe is connected to a blower, one end of the blower is connected to an air outlet pipe, the air outlet pipe is connected to a water delivery mechanism, a first water outlet, a second water outlet and a water inlet are arranged on the top of the water delivery mechanism, the pipe ports are respectively connected to the central groove inside the cylindrical ring, a rotating shaft is arranged at the center of the cylindrical ring, and a central shaft is arranged at the center of the rotating shaft.

[0005] Preferably, a central axis is arranged inside the rotating shaft, rows of cams are arranged at the front end of the central axis, a winding ring is installed at the rear end of the cam, coils are densely distributed circumferentially above the winding ring, a fixing ring is arranged at the rear of the winding ring, four buckles are distributed on the fixing ring, the rear end of the fixing ring is directly connected to the spiral interface, and three blades are distributed on the outside of the spiral interface.

[0006] Preferably, a bottom plate is provided at the bottom end of the oil delivery mechanism, and the bottom plate is connected to the outer shell, pressure springs are connected on both sides of the bottom plate, sealing plates are provided above the pressure springs on both sides, oil guide pipes are provided at the middle positions of the pressure springs on both sides, holes are provided inside the sealing plate, a first inflation pipe is placed above the sealing plate, a filter screen is placed above the first inflation pipe, and oil outlets are provided at both ends of the filter screen.

[0007] Preferably, the inner wall of the outer shell is connected to the connecting rod, and a cylindrical ring is connected above the connecting rod. There are three rows of slots at the center of the inner part of the cylindrical ring, which are water guide groove No. 1, water guide groove No. 2 and water guide groove No. 3 from top to bottom. The cylindrical ring is also provided with an oil hole. A circle of fixed teeth is arranged inside the cylindrical ring, and the fixed teeth are meshed with a small gear, and the small gear is meshed with a large gear.

[0008] Preferably, an air outlet is provided above the blower, and a pulley is arranged at the center of the blower.

[0009] Preferably, a first water outlet, a second water outlet and a water inlet are provided on the top of the water delivery mechanism, and the pipe outlets are respectively connected to the central groove inside the cylindrical ring, a second air-filling pipe is provided inside the water delivery mechanism, an air outlet pipe is provided at the outer end interface of the second air-filling pipe, a pressure plate is provided below the second air-filling pipe, a water outlet is provided in the middle of the pressure plate, a return spring is connected to the lower end of the pressure plate, and the return spring is connected to the bottom inner wall of the water delivery mechanism.

[0010] Beneficial effects of the present invention:

[0011] (1) The present invention adopts a planetary gear set design inside the rotor to avoid the large area of ​​the internal rotor contacting the gear. The central axis of the rotor drives the large gear to rotate. The central axis and the large gear are connected by a direct snap-in connection method, which has high transmission efficiency. Secondly, the contact area between the large gear and the small gear is small, and the transmission efficiency is high, which avoids the temperature rise caused by severe friction during rotation, thereby affecting the service life of the rotor.

[0012] (2) The present invention also adopts an oil delivery mechanism to deliver oil into the inner cavity where the large gear and the small gear are located. When the central shaft starts to rotate, the oil in the oil delivery mechanism will flow toward the bottom plate inside the outer shell. However, under the reverse extrusion of the bottom plate, the oil moves centripetally around the central shaft in the oil delivery mechanism. While the central shaft rotates, the cam at the front end of the central shaft is connected to the belt to drive the pulley on the blower to rotate. The blower will blow air into the oil delivery mechanism. The first inflation tube located in the oil delivery mechanism will begin to expand due to the action of the internal gas. The expanded first inflation tube will squeeze the internal oil toward the oil hole and finally enter the inner cavity, thereby keeping the oil in the inner cavity clean. The large gear and the small gear in the inner cavity can be lubricated to a great extent, reducing the heat generated by the friction between the mechanisms and extending the service life of the rotor.

[0013] (3) The water delivery mechanism of the present invention adopts the method of rotating the central axis by powering on the central axis, and the rotor shell starts to rotate, and the water delivery mechanism also rotates. During the movement, the water in the water delivery mechanism will gather at a place on the lower side of the mechanism, and the blower will start to inflate the second inflation tube in the water delivery mechanism, squeezing the internal water into the second water guide groove and the third water guide groove, thereby cooling the interior of the cylindrical ring, extending the life of the rotor, and improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 for Figure 1 A schematic diagram of the rotating shaft shown;

[0017] Figure 3 for Figure 1 The schematic diagram of the interior of the water guide channel of the cup shown;

[0018] Figure 4 for Figure 1 A schematic diagram of the outer blade is shown;

[0019] Figure 5 for Figure 1 The enlarged view of point A is shown;

[0020] Figure 6 for Figure 1 Schematic diagram of the blower shown;

[0021] Figure 7 for Figure 1 Schematic diagram of the water delivery mechanism shown.

[0022] In the figure: 1, housing; 11, connecting rod; 12, cylindrical ring; 13, fixed tooth; 14, large gear; 15, small gear; 2, rotating shaft; 21, winding ring; 22, coil; 23, fixed ring; 24, central axis; 25, buckle; 26, cam; 27, blade; 28, spiral interface; 3, oil delivery mechanism; 31, oil outlet; 32, filter screen; 33, sealing plate; 331, hole; 34, first inflation pipe; 35. Pressure spring; 36. Bottom plate; 37. Oil guide pipe; 38. Oil hole; 391. Water guide groove No. 1; 392. Water guide groove No. 2; 393. Water guide groove No. 3; 4. Blower; 41. Blowing port; 42. Pulley; 5. Water delivery mechanism; 51. First water outlet; 52. Water inlet; 53. Second water outlet; 54. Second inflation pipe; 55. Air outlet pipe; 56. Pressure plate; 57. Return spring; 58. Water guide groove. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, they are further elaborated below in conjunction with specific implementation methods.

[0024] like Figure 1-Figure 7As shown, a cast copper rotor of an electric motor of the present invention comprises a housing 1, the inner wall of the housing 1 is connected to a connecting rod 11, the connecting rod 11 is connected to a cylindrical ring 12, an oil delivery mechanism 3 is connected to the connecting rod 11, a first air charging pipe 34 is arranged inside the oil delivery mechanism 3, the first air charging pipe 34 is connected to a blower 4, one end of the blower 4 is connected to an air outlet pipe 55, the air outlet pipe 55 is connected to a water delivery mechanism 5, a first water outlet 51, a second water outlet 53 and a water inlet 52 are arranged on the top of the water delivery mechanism 5, the pipe openings are respectively connected to the inner center of the cylindrical ring 12 A groove is provided at the center of the cylindrical ring 12, and a central shaft 24 is provided at the center of the rotating shaft 2, wherein; the central shaft 24 is provided inside the rotating shaft 2, and rows of cams 26 are provided at the front end of the central shaft 24, and a winding ring 21 is installed at the rear end of the cam 26, and coils 22 are densely distributed circumferentially above the winding ring 21, and a fixing ring 23 is provided at the rear of the winding ring 21, and four buckles 25 are distributed on the fixing ring 23, and the rear end of the fixing ring 23 is directly connected to the spiral interface 28, and three blades 27 are distributed on the outer side of the spiral interface 28. During specific operation, when the central shaft 24 inside the rotating shaft 2 is powered on, the coil 22 on the winding ring 21 outside the central shaft 24 begins to generate a magnetic field after the power is turned on, and then the magnetic field generated by the rotor interacts with the permanent magnet of the stator outside the rotor, so that the coil 22 on the rotor is subjected to force, and then begins to rotate around the central shaft 24. At the same time, the spiral interface 28 directly connected to the central shaft 24 begins to drive the internal spiral shaft to rotate, and the blades 27 connected to the spiral shaft rotate to generate wind, and the outer surface of the rotor can be cooled. When the central shaft 24 rotates, the fixing ring 23 connected to the central shaft 24 will also be driven to rotate, and the fixing ring 23 is embedded in the embedded recess of the large gear 14 through the buckle 25. At this time, when the fixing ring 23 rotates, it can drive the large gear 14 to start rotating. At the same time, the rows of cams 26 located at the front end of the central shaft 24 are connected to the pulley 42 by a belt to drive the blower 4 to work.

[0025] Specifically, a bottom plate 36 is provided at the bottom end of the oil delivery mechanism 3, and the bottom plate 36 is connected to the outer shell 1, and pressure springs 35 are connected on both sides of the bottom plate 36, and sealing plates 33 are provided above the pressure springs 35 on both sides, and oil guide pipes 37 are provided at the middle positions of the pressure springs 35 on both sides, and holes 331 are provided inside the sealing plate 33, and a first inflation pipe 34 is arranged above the sealing plate 33, and a filter screen 32 is placed above the first inflation pipe 34, and oil outlets 31 are provided at both ends of the filter screen 32. In specific operation, when the shaft 2 starts to rotate, the shaft 2 drives the large gear 14 to rotate, and the large gear 14 drives the small gear 15 to start rotating, and the small gear 15 will drive the rotor housing 1 to rotate, and then the rotor will rotate as a whole. When the rotor starts to rotate, on the one hand, because the oil in the mechanism is located below the sealing plate 33, when the sealing plate 33 inside the oil delivery mechanism 3 starts to move downward under the action of the strong centrifugal force of the rotor, the sealing plate 33 will squeeze the pressure spring 35 downward, so that the internal oil will start to pass through the sealing plate 33 along the internal oil guide pipe 37. The oil hole 38 enters the inner cavity of the oil delivery mechanism 3, and then the rotating shaft 2 in the rotor drives the blower 4 to inflate the first inflation tube 34, so that the inside of the first inflation tube 34 can be expanded and bulged, squeezing the oil in the inner cavity of the oil delivery mechanism 3, so that the oil can quickly pass through the filter screen 32 and enter the inner cavity of the rotor after passing through the oil outlet 31. The oil entering the inner cavity of the rotor can lubricate, cool and clean the surface impurities between the large gear 14 and the small gear 15 of the rotor, so that the large gear 14 and the small gear 15 in the inner cavity of the rotor can work for a long time, thereby extending the service life of the rotor and improving production efficiency.

[0026] Specifically, the inner wall of the housing 1 is connected to the connecting rod 11, and the connecting rod 11 is connected to the cylindrical ring 12 above. There are three rows of notches at the center of the cylindrical ring 12, which are the first water guide groove 391, the second water guide groove 392 and the third water guide groove 393 from top to bottom. The cylindrical ring 12 is also provided with an oil hole 38. A circle of fixed teeth 13 is arranged inside the cylindrical ring 12, and the fixed teeth 13 are meshed with the small gear 15, and the small gear 15 is meshed with the large gear 14. In specific operation, when the rotating shaft 2 starts to rotate, the large gear 14 in the inner cavity of the rotor will rotate, and the large gear 14 will drive the small gear 15 to rotate, and the internal small gear 15 will drive the cylindrical ring 12 to rotate. The cylindrical ring 12 inside the rotor and the rotor housing 1 are welded by the connecting rod 11, so that the housing and the cylindrical ring 12 can be connected at the bottom, and the device located between the two can work, which can provide necessary auxiliary work for the internal rotating shaft 2.

[0027] Specifically, an air outlet 1 is provided above the blower 4, and a pulley 42 is arranged at the center of the blower 4. In specific operation, when the central shaft 24 in the rotating shaft 2 is powered on, the rotating shaft 2 will be subjected to the force and start to rotate around the central shaft 24 of the rotating shaft 2, at which time the cam 26 at the front end of the central shaft 24 will rotate, and at the same time a belt is connected to the cam 26, which is connected to the pulley 42 on the blower 4. When the central shaft 24 rotates, the blower 4 starts to rotate at the same time, using internal suction, and then using the air outlet 41 to inflate the first inflation tube 34 and the second inflation tube 54, respectively squeezing the oil and water, and then pushing the rotor to work continuously.

[0028] Specifically, a first water outlet 51, a second water outlet 53 and a water inlet 52 are provided on the top of the water delivery mechanism 5, and the pipe outlets are respectively connected to the central groove inside the cylindrical ring 12. A second air-filling pipe 54 is provided inside the water delivery mechanism 5, and an air outlet pipe 55 is provided at the outer end interface of the second air-filling pipe 54. A pressure plate 56 is provided below the second air-filling pipe 54, and a water outlet 58 is provided in the middle of the pressure plate 56. A return spring 57 is connected to the lower end of the pressure plate 56, and the return spring 57 is connected to the bottom inner wall of the water delivery mechanism 5. During specific operation, when the rotor starts to work, the rotor housing 1 begins to be affected by the centripetal force. At this time, the water in the water delivery mechanism 5 begins to move toward the pressure plate 56 inside the water delivery mechanism 5 and begins to squeeze the pressure plate 56. At the same time, the pressure plate 56 is also affected by the bottom return spring 57, so that the water at the lower end of the pressure plate 56 begins to move toward the inner cavity of the water delivery mechanism 5 through the water guide port 58. Under the action of the blower 4, the water in the inner cavity is squeezed toward the first water outlet 51 and the second water outlet 53, so that the water is sent to the No. 1 water guide groove 391 and the No. 2 water guide groove 392, so that it enters the central groove inside the cylindrical ring 12, circulates in the groove, and finally drives out from the No. 3 water guide groove 393, enters the water delivery mechanism 5 from the water inlet 52, and circulates in sequence, which can cool down the cylindrical ring 12 and avoid the temperature of the cylindrical ring 12 inside the rotor being too high, affecting the working efficiency of the rotor.

[0029] The working principle of the cast copper rotor of an electric motor provided by the present invention is as follows:

[0030] When the central shaft 24 inside the rotating shaft 2 is powered on, the coil 22 on the winding ring 21 outside the central shaft 24 begins to generate a magnetic field after the power is turned on, and then the magnetic field generated by the rotor interacts with the permanent magnet of the stator outside the rotor, so that the coil 22 on the rotor is acted upon by a force, and then begins to rotate around the central shaft 24. At the same time, the spiral interface 28 directly connected to the central shaft 24 begins to drive the internal spiral shaft to rotate, and at the same time, the blades 27 connected to the spiral shaft rotate to generate wind, and at the same time, the outer surface of the rotor can be cooled. When the central shaft 24 rotates, the fixing ring 23 connected to the central shaft 24 will also be driven to rotate, and the fixing ring 23 is embedded in the embedded recess of the large gear 14 through the buckle 25. At this time, when the fixing ring 23 rotates, it drives the large gear 14 to start rotating. At the same time, the rows of cams 26 located at the front end of the central shaft 24 are connected to the cam 26 and the pulley 42 through a belt, driving the blower 4 to work.On the other hand, the rotating shaft 2 drives the large gear 14 to rotate, and the large gear 14 drives the small gear 15 to start rotating at the same time, and the small gear 15 will drive the rotor housing 1 to rotate, and then the rotor will rotate as a whole. When the rotor starts to rotate, on the one hand, because the oil in the mechanism is located below the sealing plate 33, when the sealing plate 33 inside the oil delivery mechanism 3 begins to move downward under the action of the strong centrifugal force of the rotor, the sealing plate 33 will squeeze the pressure spring 35 downward, so that the internal oil will begin to pass through the oil hole 38 of the sealing plate 33 along the internal oil guide pipe 37 and enter the inner cavity of the oil delivery mechanism 3. After that, the rotating shaft 2 in the rotor drives the blower 4 to inflate the first inflation pipe 34, which can expand and bulge the inside of the first inflation pipe 34, squeeze the oil in the inner cavity of the oil delivery mechanism 3, so that the oil can quickly pass through the filter screen 32, pass through the oil outlet 31 and enter the inner cavity of the rotor. The oil enters the inner cavity of the rotor to lubricate, cool and surface the large gear 14 and the small gear 15 between the rotor. The impurities on the surface are cleaned, so that the large gear 14 and the small gear 15 in the inner cavity of the rotor can work for a long time, extending the service life of the rotor and improving production efficiency. In addition, when the rotor starts to work, the rotor housing 1 begins to be acted upon by the centripetal force, and the water in the water delivery mechanism 5 begins to move toward the pressure plate 56 inside the water delivery mechanism 5, and begins to squeeze the pressure plate 56. At the same time, the pressure plate 56 is also acted upon by the bottom return spring 57, so that the water at the lower end of the pressure plate 56 begins to flow through the water guide port 58 toward the inner cavity of the water delivery mechanism 5. Move, under the action of the blower 4, the water in the inner cavity can be squeezed toward the first water outlet 51 and the second water outlet 53, so that the water can be sent to the No. 1 water guide groove 391 and the No. 2 water guide groove 392, so that it enters the central groove inside the cylindrical ring 12, circulates in the groove, and finally drives out from the No. 3 water guide groove 393, enters the water delivery mechanism 5 from the water inlet 52, and circulates in sequence, which can cool the cylindrical ring 12 and avoid the temperature of the cylindrical ring 12 inside the rotor being too high, affecting the working efficiency of the rotor.

Claims

1. A cast copper rotor for an electric motor, characterized in that: The invention comprises a shell (1), the inner wall of the shell (1) is connected to a connecting rod (11), the connecting rod (11) is connected to a cylindrical ring (12), an oil delivery mechanism (3) is connected to the connecting rod (11), a first air charging pipe (34) is arranged inside the oil delivery mechanism (3), the first air charging pipe (34) is connected to a blower (4), one end of the blower (4) is connected to an air outlet pipe (55), the air outlet pipe (55) is connected to a water delivery mechanism (5), a first water outlet (51), a second water outlet (53) and a water inlet (52) are arranged on the top of the water delivery mechanism (5), the first water outlet (51), the second water outlet (53) and the water inlet (52) are respectively connected to a central groove inside the cylindrical ring (12), a rotating shaft (2) is arranged at the center inside the cylindrical ring (12), and a central axis (24) is arranged at the center of the rotating shaft (2), wherein; A central shaft (24) is arranged inside the rotating shaft (2), a row of cams (26) are arranged at the front end of the central shaft (24), a winding ring (21) is installed at the rear end of the cam (26), coils (22) are densely distributed circumferentially above the winding ring (21), a fixing ring (23) is arranged behind the winding ring (21), four buckles (25) are distributed on the fixing ring (23), the rear end of the fixing ring (23) is directly connected to a spiral interface (28), and three blades (27) are distributed on the outer side of the spiral interface (28); A bottom plate (36) is provided at the bottom end of the oil delivery mechanism (3), and the bottom plate (36) is connected to the housing (1). Pressure springs (35) are connected to both sides of the bottom plate (36). Sealing plates (33) are provided above the pressure springs (35) on both sides. Oil guide pipes (37) are provided at the middle of the pressure springs (35) on both sides. Holes (331) are provided inside the sealing plates (33). A first air-inflating pipe (34) is arranged above the sealing plates (33). A filter screen (32) is provided above the first air-inflating pipe (34). Oil outlets (31) are provided at both ends of the filter screen (32). The inner wall of the housing (1) is connected to the connecting rod (11), and the upper part of the connecting rod (11) is connected to a cylindrical ring (12). The cylindrical ring (12) has three rows of notches at the center thereof, which are, from top to bottom, a first water guide groove (391), a second water guide groove (392), and a third water guide groove (393). The cylindrical ring (12) is also provided with an oil hole (38). A circle of fixed teeth (13) is provided inside the cylindrical ring (12), and the fixed teeth (13) are meshed with a small gear (15), and the small gear (15) is meshed with a large gear (14); The top of the water delivery mechanism (5) is provided with a first water outlet (51), a second water outlet (53) and a water inlet (52); the first water outlet (51), the second water outlet (53) and the water inlet (52) are respectively connected to the central groove inside the cylindrical ring (12); a second air-filling pipe (54) is provided inside the water delivery mechanism (5); an air outlet pipe (55) is provided at the outer end interface of the second air-filling pipe (54); a pressure plate (56) is provided below the second air-filling pipe (54); a water outlet (58) is provided in the middle of the pressure plate (56); a return spring (57) is connected to the lower end of the pressure plate (56); and the return spring (57) is connected to the inner wall of the bottom of the water delivery mechanism (5).

2. The cast copper rotor of an electric motor according to claim 1, characterized in that: An air outlet (1) is provided above the blower (4), and a pulley (42) is arranged at the center of the blower (4).

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