Iron core direct current motor with low cogging force and slow temperature rise

Abstract

The utility model discloses an iron core direct current motor with low cogging force and slow temperature rise, which relates to the technical field of direct drive motors and comprises a bottom plate, a stator assembly is arranged in the middle of the top of the bottom plate, sliding rails are fixedly arranged at two ends of the top of the bottom plate, and a machine body is arranged between the two sliding rails in a sliding manner. When the inclination angle of the stator magnetic pole needs to be adjusted, the screw rod is pushed to drive the movable plate to move, so that the stator magnetic pole is driven to rotate for a certain angle on the fixed plate, the screw rod slides for a certain distance in the limiting groove at the moment, and finally the screw rod is fixed on the supporting plate through reverse rotation of the two fastening nuts. The problems that in the prior art, after the stator magnetic pole is inclined and then fixedly attached to the fixed plate, the inclination angle of the stator magnetic pole is inconvenient to adjust, the reduction degree of the thrust of the direct current motor cannot be adjusted, and certain limitation exists are solved.

Description

Technical Field

[0001] This utility model relates to the field of direct drive motor technology, and in particular to a cored DC motor with low cogging force and slow temperature rise. Background Technology

[0002] A direct drive motor is a type of motor that converts electrical energy into mechanical energy to directly drive the linear motion of a load. Direct drive motors are generally divided into two types: those with an iron core and those without. Among them, the iron core direct drive motor has the coil wound on a silicon steel plate and the generated force is maximized through a single-sided magnetic circuit. This type of motor uses a special electromagnetic design to provide the maximum rated thrust, but the drawback is that the cogging force is large. In order to reduce the cogging force, the stator magnetic poles are tilted and attached to the stator plate, thereby reducing the cogging force, but the thrust is also reduced accordingly.

[0003] For example, the existing document CN209120036U, entitled "A Linear Motor with Iron Core and Low Cogging Force," proposes that the position of the base plate and permanent magnet relative to the iron core is adjusted by using a rotating component, thereby reducing the cogging force. At the same time, since the angle between the base plate and the permanent magnet is adjusted by the rotating component, the position between the permanent magnet and the iron core can be adjusted according to the actual use.

[0004] However, the appealed patent and existing DC motors fix the stator magnetic poles to the stator plate at an angle, which makes it difficult to adjust the tilt angle of the stator magnetic poles and thus cannot adjust the degree of thrust reduction of the DC motor, which has certain limitations. Therefore, it is necessary to propose a DC motor with an iron core that has low cogging force and slow heating to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a DC motor with a core that has low cogging force and slow temperature rise, in order to solve the problem mentioned above. In order to reduce cogging force, the stator magnetic poles of the existing DC motor with a core are tilted and fixedly attached to the stator plate, thereby reducing the cogging force. However, it is not convenient to adjust the tilt angle of the stator magnetic poles, and thus cannot adjust the degree of thrust reduction of the DC motor, which has certain limitations.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a DC motor with a core and low cogging force and slow heating, comprising a base plate, a stator assembly disposed in the middle of the top of the base plate, and slide rails fixedly disposed at both ends of the top of the base plate, with an organic body slidably disposed between the two slide rails;

[0007] The stator assembly includes a fixed plate fixedly connected to a base plate by bolts. A fixed plate is fixedly mounted on the top of the fixed plate, and a movable plate is slidably mounted on the top of the fixed plate. In the initial state, the fixed plate and the movable plate are symmetrically distributed about the center line of the fixed plate. Both the fixed plate and the movable plate have slots inside. Several evenly arranged limiting rods are fixedly mounted inside the slots. Stator magnetic poles are rotatably mounted between the corresponding limiting rods on both sides. The stator magnetic poles are adapted to the slots. Rotating holes are fixedly mounted at the ends of the stator magnetic poles. The rotating holes are adapted to the limiting rods. A support plate is fixedly mounted at the top end of the fixed plate. A limiting groove is fixedly mounted inside the support plate, penetrating both sides of the support plate. A screw is fixedly mounted at the end of the movable plate near the support plate. A handle is fixedly mounted at the end of the screw that moves through the limiting groove. Two fastening nuts are threadedly connected to the outer ring of the screw, and the two fastening nuts are located on both sides of the support plate.

[0008] Preferably, the machine body has an iron core inside, and several windings are wound around the outside of the iron core. The iron core is located above the stator assembly, and the machine body is provided with a cooling component for dissipating heat from the inside of the machine body.

[0009] Preferably, the cooling component includes an air inlet pipe, a distribution pipe, nozzles, and a heat dissipation port. The air inlet pipe and the heat dissipation port are respectively fixedly installed at both ends of the machine body. The nozzles are evenly distributed on the distribution pipe. The distribution pipe is installed at the end of the machine body and is connected to the air inlet pipe. An air supply component is installed between the machine body and the slide rail.

[0010] Preferably, the air supply assembly includes a rack, which is fixedly mounted on the top of the slide rail. A gear is meshed on the rack. A drive shaft that is rotatably connected to the body is fixedly mounted on the side of the gear. An interconnected movable groove and a slide groove are fixedly mounted inside the structural layer at the end of the body. A rotating disk is fixedly connected to one end of the drive shaft that extends movably into the movable groove. A connecting rod is rotatably connected to the side of the drive shaft near the edge of the rotating disk. A telescopic rod is rotatably connected to the end of the connecting rod away from the drive shaft. A piston is fixedly mounted to the end of the telescopic rod away from the connecting rod. The piston is adapted to the slide groove. A first one-way valve and a second one-way valve are provided inside the air inlet pipe. The outlet of the slide groove is interconnected with the air inlet pipe and is located between the first one-way valve and the second one-way valve. The second one-way valve is interconnected with the diversion pipe.

[0011] Preferably, a first filter screen is provided on the inner wall near the air inlet of the air inlet pipe, and a second filter screen is provided on the inner wall of the heat dissipation port.

[0012] Preferably, the body has a buffer hole that communicates with the movable slot.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. When it is necessary to adjust the tilt angle of the stator magnetic poles, push the screw to move the movable plate, thereby causing the stator magnetic poles to rotate a certain angle on the fixed plate. At this time, the screw also slides a certain distance inside the limit groove. Finally, by rotating the two fastening nuts in opposite directions, the screw is fixed on the support plate, thereby fixing the position of the movable plate and completing the adjustment of the tilt angle of the stator magnetic poles. This solves the problem of existing technology where the stator magnetic poles are tilted and fixed to the fixed plate, which makes it inconvenient to adjust the tilt angle of the stator magnetic poles and thus cannot adjust the degree of reduction of the DC motor thrust, which has certain limitations.

[0015] 2. By supplying low-temperature external air through the air inlet pipe, the air passes through the split pipe, nozzle, internal cavity of the machine and heat dissipation port in sequence, thereby removing the heat from the inside of the machine and cooling it down. This solves the problem of excessive temperature rise and slow heat dissipation when the machine is running at high speed or for a long time, which can also affect the stable operation of the iron core direct drive motor.

[0016] 3. After the machine body moves on the slide rail, the rack and pinion mechanism causes the gears to rotate, which in turn drives the rotating disk to rotate. This causes the telescopic rod and piston to move back and forth inside the slide groove. When the piston moves downward, the first one-way valve draws in the cooler air from outside into the air inlet pipe. When the piston moves upward, the second one-way valve blows the cooler air into the splitter pipe. This process is repeated to achieve the air supply action inside the machine body. It also makes good use of the displacement power of the machine body and does not require an additional air supply power source.

[0017] 4. By installing the buffer hole, when the piston moves back to its original position inside the slide groove, the air pressure inside the movable groove is the same as the outside, thus avoiding affecting the displacement of the piston inside the slide groove. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a DC motor with an iron core that has low cogging force and slow heating.

[0019] Figure 2 This is a schematic cross-sectional view of a DC motor with a core that has low cogging force and slow heating, according to the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the air supply component of this utility model.

[0021] Figure 4 This is a schematic diagram of the stator assembly structure of this utility model.

[0022] In the diagram: 1. Base plate; 2. Slide rail; 3. Body; 4. Fixed plate; 5. Fixed plate; 6. Movable plate; 7. Limiting rod; 8. Stator pole; 9. Support plate; 10. Limiting groove; 11. Screw; 12. Fastening nut; 13. Iron core; 14. Winding; 15. Heat dissipation vent; 16. Air inlet pipe; 17. First one-way valve; 18. Second one-way valve; 19. Nozzle; 20. Rack; 21. Gear; 22. Rotary disk; 23. Connecting rod; 24. Telescopic rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figures 1-4 The diagram shows a DC motor with a low cogging force and slow temperature rise, comprising a base plate 1, a stator assembly disposed in the middle of the top of the base plate 1, slide rails 2 fixedly disposed at both ends of the top of the base plate 1, a body 3 slidably disposed between the two slide rails 2, an iron core 13 disposed inside the body 3, and several windings 14 wound around the outside of the iron core 13, the iron core 13 being located above the stator assembly, the stator assembly comprising a stator plate 4 fixedly connected to the base plate 1 by bolts, and several stator magnetic poles 8 evenly arranged on the stator plate 4. This motor adopts a special electromagnetic design, using the reciprocating linear motion of the iron core 13 to achieve the output of DC motor torque, providing maximum rated thrust, but the drawback is high cogging force. In order to reduce cogging force, the existing technology tilts the stator magnetic poles 8 against the stator plate 4, thereby reducing the cogging force, but as a sacrifice, the thrust of the motor is also reduced accordingly.

[0025] Considering that existing technology tilts the stator magnetic pole 8 and fixes it to the stator plate 4, making it inconvenient to adjust the tilt angle of the stator magnetic pole 8 and thus unable to adjust the degree of thrust reduction of the DC motor, this invention has certain limitations. Therefore, a fixed plate 5 is fixedly installed on the top of the stator plate 4, and a movable plate 6 is slidably installed on the top of the stator plate 4. In the initial state, the fixed plate 5 and the movable plate 6 are symmetrically distributed about the center line of the stator plate 4. Both the fixed plate 5 and the movable plate 6 have slots inside, and several evenly arranged limiting rods 7 are fixedly installed inside the slots. The stator magnetic pole 8 rotates... The stator magnetic pole 8 is positioned between two corresponding limiting rods 7 on both sides, and the stator magnetic pole 8 is matched with the slot. The end of the stator magnetic pole 8 is fixedly provided with a rotating hole, which is matched with the limiting rod 7. The top end of the fixed plate 4 is fixedly provided with a support plate 9. The inside of the support plate 9 is fixedly provided with a limiting groove 10 that passes through both sides of the support plate 9. The end of the movable plate 6 near the support plate 9 is fixedly provided with a screw 11. The end of the screw 11 that moves through the limiting groove 10 is fixedly provided with a handle. The outer ring of the screw 11 is threaded with two fastening nuts 12, and the two fastening nuts 12 are located on both sides of the support plate 9.

[0026] When it is necessary to adjust the tilt angle of the stator pole 8, push the screw 11 to move the movable plate 6, thereby causing the stator pole 8 to rotate a certain angle on the fixed plate 5. At this time, the screw 11 also slides a certain distance inside the limiting groove 10. Finally, by rotating the two fastening nuts 12 in opposite directions, the screw 11 is fixed on the support plate 9, thereby fixing the position of the movable plate 6 and completing the adjustment of the tilt angle of the stator pole 8. This solves the problem of the existing technology where the stator pole 8 is tilted and fixed to the fixed plate 4, which makes it inconvenient to adjust the tilt angle of the stator pole 8 and thus cannot adjust the degree of reduction of the DC motor thrust, which has certain limitations.

[0027] In addition, the body 3 may overheat during high-speed movement or long-term operation, and the slow heat dissipation may also affect the stable operation of the iron-core direct-drive motor. Therefore, a cooling component is installed on the body 3 to dissipate heat inside the body 3. The cooling component includes an air inlet pipe 16, a diversion pipe, nozzles 19, and a heat dissipation port 15. The air inlet pipe 16 and the heat dissipation port 15 are fixedly installed at both ends of the body 3, and the nozzles 19 are evenly distributed on the diversion pipe. The diversion pipe is located at the end inside the body 3 and is connected to the air inlet pipe 16. By supplying low-temperature external air to the air inlet pipe 16, the air flows through the diversion pipe, nozzles 19, the inner cavity of the body 3, and the heat dissipation port 15 in sequence, thereby carrying away the heat inside the body 3 and cooling it.

[0028] To better utilize the displacement power of the body 3, an air supply assembly is provided between the body 3 and the slide rail 2. The air supply assembly includes a rack 20, which is fixedly mounted on the top of the slide rail 2. A gear 21 is meshed on the rack 20. A drive shaft that is rotatably connected to the body 3 is fixedly mounted on the side of the gear 21. An interconnected movable groove and a slide groove are fixedly mounted inside the structural layer at the end of the body 3. A rotating disk 22 is fixedly connected to one end of the drive shaft that extends into the movable groove. A connecting rod 23 is rotatably connected to the side of the rotating disk 22 near the edge. A telescopic rod 24 is rotatably connected to the end of the connecting rod 23 away from the drive shaft. A piston is fixedly mounted to the end of the telescopic rod 24 away from the connecting rod 23. The piston and the slide groove are matched. A first one-way valve 17 and a second one-way valve 18 are provided inside the air inlet pipe 16. The outlet of the slide groove is interconnected with the air inlet pipe 16 and is located between the first one-way valve 17 and the second one-way valve 18. The second one-way valve 18 is interconnected with the diversion pipe.

[0029] When the body 3 moves on the slide rail 2, the rack 20 causes the gear 21 to rotate, which in turn drives the rotating disk 22 to rotate. This causes the telescopic rod 24 and the piston to move back and forth inside the slide groove. When the piston moves downward, the first one-way valve 17 draws in the lower temperature air from the outside into the air inlet pipe 16. When the piston moves upward, the second one-way valve 18 blows the lower temperature air into the split pipe. This process is repeated to achieve the air supply action inside the body 3. It makes good use of the displacement power of the body 3 and does not require an additional air supply power source.

[0030] Furthermore, a first filter screen is installed on the inner wall near the air inlet of the air inlet pipe 16, and a second filter screen is installed on the inner wall of the heat dissipation vent 15. The installation of the first and second filters prevents external dust from entering the machine body 3.

[0031] Furthermore, the body 3 is provided with a buffer hole that communicates with the movable groove. By installing the buffer hole, when the piston moves back and forth inside the slide groove, the air pressure inside the movable groove is the same as that outside, thus avoiding affecting the displacement of the piston inside the slide groove.

Claims

1. A cored DC motor with low cogging force and slow temperature rise, comprising a base plate (1), characterized in that: The middle part of the top of the bottom plate (1) is provided with a stator assembly, and the two ends of the top of the bottom plate (1) are fixedly provided with slide rails (2), and the organism (3) is slidably arranged between the two slide rails (2); The stator assembly comprises a fixed plate (4) fixedly connected with the bottom plate (1) by bolts, a fixed plate (5) fixedly arranged on the top of the fixed plate (4), and a movable plate (6) slidably arranged on the top of the fixed plate (4); in the initial state, the fixed plate (5) and the movable plate (6) are symmetrically distributed about the center line of the fixed plate (4); the inside of the fixed plate (5) and the movable plate (6) is provided with a clamping groove, and a plurality of evenly arranged limiting rods (7) are fixedly arranged in the clamping groove; the limiting rods (7) corresponding to each other are rotatably arranged with stator magnetic poles (8); the stator magnetic poles (8) are matched with the clamping groove; the end of the stator magnetic pole (8) is fixedly provided with a rotating hole matched with the limiting rod (7); the end of the fixed plate (4) is fixedly provided with a supporting plate (9); the inside of the supporting plate (9) is fixedly provided with a limiting groove (10) penetrating through the two sides of the supporting plate (9); one end of the movable plate (6) close to the supporting plate (9) is fixedly provided with a screw rod (11); one end of the screw rod (11) passing through the limiting groove (10) is fixedly provided with a handle; the outer circle of the screw rod (11) is threadedly connected with two fastening nuts (12), and the two fastening nuts (12) are respectively located on the two sides of the supporting plate (9).

2. A low cogging force and slow temperature rise core type DC motor according to claim 1, characterized in that: The inside of the organism (3) is provided with an iron core (13), and the outside of the iron core (13) is provided with a plurality of windings (14); the iron core (13) is located above the stator assembly; the organism (3) is provided with a cooling assembly for cooling the inside of the organism (3).

3. A low cogging force, slow warm-up, cored DC motor according to claim 2, characterized in that: The cooling assembly comprises an air inlet pipe (16), a shunt pipe, a spray head (19) and a heat dissipation opening (15); the air inlet pipe (16) and the heat dissipation opening (15) are fixedly arranged at the two ends of the organism (3); the spray heads (19) are evenly arranged on the shunt pipe; the shunt pipe is arranged at the end inside the organism (3) and is connected with the air inlet pipe (16); the organism (3) and the slide rail (2) are provided with a air supply assembly.

4. A low cogging force, slow warm-up, cored DC motor as defined in claim 3, characterized in that: The air supply assembly comprises a rack (20) fixedly arranged at the top of the slide rail (2), a gear (21) engaged with the rack (20), a driving shaft fixedly arranged at the side of the gear (21) and rotatably connected with the body (3), an active slot and a sliding slot fixedly arranged in the structure layer at the end of the body (3) and in communication with each other, a rotating disc (22) fixedly connected with the end of the driving shaft extending into the active slot, a connecting rod (23) rotatably connected with the side of the rotating disc (22) close to the edge, an extension rod (24) rotatably connected with the end of the connecting rod (23) away from the driving shaft, a piston fixedly arranged at the end of the extension rod (24) away from the connecting rod (23), the piston being matched with the sliding slot, a first one-way valve (17) and a second one-way valve (18) arranged in the air inlet pipe (16), the outlet of the sliding slot being in communication with the air inlet pipe (16) and located between the first one-way valve (17) and the second one-way valve (18), and the second one-way valve (18) being connected with the shunt pipe.

5. A low cogging force, slow warm-up, cored DC motor as defined in claim 4, characterized in that: A first filter screen is arranged on the inner wall close to the air inlet of the air inlet pipe (16), and a second filter screen is arranged on the inner wall of the heat dissipation opening (15).

6. A low cogging force, slow warm-up, cored DC motor as defined in claim 4, characterized in that: The body (3) is provided with a buffer hole in communication with the active slot.

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