A low-wear dustproof geared motor

Abstract

This invention relates to the field of motor technology, specifically disclosing a low-wear dustproof geared motor. It includes a cylindrical motor housing, with a front and rear cover bolted to its front and rear ends. A power supply cable is welded to the upper exterior of the motor housing. A stator winding with equally angled distribution is fixedly installed inside the rear end of the motor housing, and a matching rotor winding is arranged inside the stator winding. A sealing cover is fixedly installed inside the front end of the motor housing, with an output shaft and a planetary gear carrier rotatably mounted on its left and right ends, respectively. This low-wear dustproof geared motor employs a novel structural design, utilizing internal gear transmission to drive the output shaft at reduced speed, ultimately achieving the purpose of speed reduction and increased torque. An appropriate amount of liquid lubricating oil is filled inside the sealing cover, lubricating the planetary gears and thus reducing wear.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a low-wear, dustproof geared motor. Background Technology

[0002] Electric motors are very common power devices in daily life. They use electromagnetic induction to rotate and drive the equipment. Among them, geared motors add planetary reduction gears inside the motor to reduce the speed of the output shaft rotation, which can increase torque and are widely used in the drive of robot joints.

[0003] In the prior art, Chinese patent application number CN202411025134.9 discloses a geared motor, including a motor housing, a cooling fan, a motor body, and a moisture-absorbing sponge. The motor body and the cooling fan are both located inside the motor housing. The motor housing has an air inlet and an air outlet. The cooling fan rotates to form a cooling airflow inside the motor housing to cool the motor body. Air enters from the air inlet and flows out from the air outlet, forming the cooling airflow. The motor housing has a bent inner cavity with openings at only two ends. The cooling fan and the motor body are both located in the inner cavity. The openings at both ends of the inner cavity are the air inlet and the air outlet, respectively. They are arranged side by side. The moisture-absorbing sponge covers the air inlet and the air outlet and can rotate to exchange the positions of the part covering the air inlet and the part covering the air outlet.

[0004] For example, in the prior art, Chinese patent application number CN202011060528.X discloses a geared motor, including a motor body, a reduction mechanism, and a threaded push rod. The motor body includes a motor rotor and a fixed front cover, which are hollow structures. The threaded push rod passes through the center of the motor body, the planetary gear support, and the fixed front cover. The rotation of the motor drives the reduction mechanism to rotate. The internal gear ring of the reduction mechanism meshes with the threaded push rod, causing the threaded push rod to rotate. The hole wall of the center hole of the fixed front cover is provided with a first limiting part, and the threaded push rod is provided with a second limiting part. The rotation of the threaded push rod is restricted by the cooperation of the first limiting part and the second limiting part, so that the threaded push rod moves linearly. This solves the problems of excessively large axial dimensions, excessively long push rod causing low accuracy in the pushing direction, and push rod bending. The structure is compact, stable during operation, easy to use, and occupies little space.

[0005] For example, in the prior art, Chinese patent application number CN201220276136.1 discloses a planetary geared motor, including a motor and a starting wheel connected to one end of the motor, a connecting plate sleeved with the starting wheel, an inner gear sleeve meshing with the outer periphery of the connecting plate, one or more planetary gears located in the inner gear sleeve, a planet carrier with planetary gears installed at one end, a central gear located at the other end of the planet carrier, and one or more planetary gears engaging with the central gear; the planet carrier has three planetary gears at one end, and the output frame has three planetary gears at one end. By using several planetary gears to transmit the load simultaneously, the power is split and internal meshing is used reasonably, resulting in a compact structure, small size, and light weight.

[0006] Based on the above information, it can be seen that the reduction gears in the existing technology generally use planetary gear meshing to achieve the purpose of speed reduction. However, in actual use, the transmission between planetary gears will continuously come into contact and rub against each other, resulting in greater friction at the planetary gear positions. Over time, this will affect the overall service life of the motor due to the planetary gears. Summary of the Invention

[0007] The purpose of this invention is to provide a low-wear, dustproof geared motor to solve the problem of large wear on planetary gears mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a low-wear dustproof geared motor, comprising a cylindrical motor housing, with a front end cover and a rear end cover fixedly mounted at the front and rear ends of the motor housing using bolts; a power supply cable is fixedly welded to the upper exterior of the motor housing; stator windings distributed at equal angles are fixedly mounted inside the rear end of the motor housing, and a matching rotor winding is provided inside the stator windings; a sealing cover is fixedly mounted inside the front end of the motor housing, and an output shaft and a planetary gear carrier are rotatably mounted at the left and right ends of the sealing cover, respectively; three internal gears are rotatably mounted on the side of the planetary gear carrier, and the three internal gears form a planetary reduction structure; the sealing cover is filled with liquid lubricating oil, and an oil reservoir and a spray head are fixedly mounted inside the sealing cover; the sealing cover and the spray head are provided with a circulation mechanism for cooling the lubricating oil; a cooling fan is fixedly mounted outside the rear shaft of the rotor windings.

[0009] Preferably, the outer side of the internal gear is meshed with the outer gear fixedly installed on the inner wall of the sealing cover, and the inner side of the internal gear is meshed with the reduction gear. The reduction gear is fixedly welded to the output shaft, and the output shaft is decelerated by the transmission between the planetary gear and the reduction gear.

[0010] Preferably, the circulation mechanism includes an oil inlet pipe and an oil outlet pipe fixedly installed through the side of the oil storage box. A first one-way valve is fixedly installed on the outside of the oil inlet pipe, and a second one-way valve is fixedly installed on the outside of the oil outlet pipe. The first and second one-way valves are used to make the oil inlet pipe and the oil outlet pipe flow in one direction.

[0011] Preferably, the oil outlet pipe extends to the outside of the sealing cover and connects to the spray head, and the oil outlet pipe has an overall bent structure. Furthermore, aluminum alloy heat dissipation fins that penetrate the oil outlet pipe are fixedly installed on the outside of the sealing cover. The heat dissipation fins are evenly spaced, and the bent oil outlet pipe combined with the heat dissipation fins allows the lubricating oil to dissipate heat quickly when flowing.

[0012] Preferably, a horizontally arranged piston plate is slidably installed inside the oil reservoir, and a return spring is fixedly installed between the upper surface of the piston plate and the inner wall of the oil reservoir. The height of the piston plate is always higher than the bottom of the oil outlet pipe, and the circulation of lubricating oil is achieved by the up and down movement of the piston plate.

[0013] Preferably, a compression cam is rotatably mounted inside the oil reservoir above the piston plate, and a driven gear located outside the oil reservoir is fixedly mounted on the front side of the compression cam.

[0014] Preferably, the position of the driven gear corresponds vertically to the position of the planetary gear carrier, and a drive pawl is fixedly installed on the outside of the planetary gear carrier, and the drive pawl meshes with the driven gear.

[0015] Preferably, a first ventilation hole is provided inside the rear end cover, and a second ventilation hole is provided on the side of the middle position of the motor housing. The first ventilation hole and the second ventilation hole are combined with a cooling fan to form a cooling air duct, and the cooling fan and the air duct are used to dissipate heat from the inside of the motor housing.

[0016] Preferably, a ring-shaped dustproof mesh is fitted to the inner wall of the motor housing, and the position of the dustproof mesh corresponds to the position of the second ventilation hole, so as to prevent dust from entering the motor housing from the second ventilation hole.

[0017] Preferably, the dustproof net is fixedly connected to the planetary gear frame through the fixing frame on its inner side, and the dustproof net and the motor housing form a rotating structure, and the outer surface of the dustproof net is in contact with the cleaning brush, and the cleaning brush is fixedly installed inside the second ventilation hole.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This low-wear dustproof geared motor adopts a novel structural design, the specific details of which are as follows:

[0019] 1. The planetary gear carrier is driven to rotate by the cooperation between the stator winding and the rotor winding. At this time, the planetary gear carrier drives the planetary internal gear inside the sealing cover. The internal gear drives the output shaft to rotate at a reduced speed, which ultimately achieves the purpose of reducing speed and increasing torque. An appropriate amount of liquid lubricating oil is filled inside the sealing cover to lubricate the planetary gear position, thereby reducing wear.

[0020] 2. During the rotation of the planetary gear carrier, the external drive pawl intermittently contacts the driven gear, thereby driving the driven gear to rotate (a limiting mechanism is set at the position of the driven gear shaft, which can clamp friction limit or other existing technologies to prevent the driven gear from rotating arbitrarily when there is no driving force), thereby causing the driven gear to drive the extrusion cam inside the oil reservoir to rotate.

[0021] Furthermore, by using the rotation of the compression cam in conjunction with the return spring, the piston plate inside the oil reservoir moves up and down. When the piston plate moves upward, it uses negative pressure to force the lubricating oil in the sealing cover into the oil inlet pipe. Then, when the piston plate moves downward, it uses compression force to force the lubricating oil into the oil outlet pipe. Finally, the lubricating oil is sprayed out from the spray head, making the lubricating oil adhere more evenly.

[0022] Furthermore, when the lubricating oil flows in the oil outlet pipe, the air flow driven by the cooling fan is used to cool it down (a heat dissipation air channel is formed between the first ventilation hole and the second ventilation hole). At the same time, the heat dissipation fins can accelerate the dissipation of heat, so that the lubricating oil sprayed from the spray head can cool the planetary gear transmission position.

[0023] 3. A dustproof net is installed at the second ventilation hole (the second ventilation net is the air inlet). The dustproof net is used to block dust from entering the motor housing. When the planetary gear carrier rotates, it drives the dustproof net to rotate through the fixed frame. The cleaning brush is used to stick to the surface of the dustproof net to clean the dust on the surface of the dustproof net. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the motor housing of the present invention;

[0026] Figure 3 This is a schematic diagram of the installation position of the cooling fan in this invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the sealing cover of the present invention;

[0028] Figure 5 This is a schematic diagram of the oil storage box structure of the present invention;

[0029] Figure 6This is a schematic diagram of the driven gear transmission relationship structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the external structure of the back of the sealing cover of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the oil storage box of the present invention;

[0032] Figure 9 This is a schematic diagram showing the positional relationship between the dustproof net and the second ventilation hole of the present invention;

[0033] Figure 10 This is a schematic diagram of the dustproof net structure of the present invention;

[0034] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle.

[0035] In the diagram: 1. Motor housing; 2. Front cover; 3. Rear cover; 4. Power supply cable; 5. Stator winding; 6. Rotor winding; 7. Sealing cover; 8. Planetary gear carrier; 9. Internal gear; 10. External gear; 11. Output shaft; 12. Reduction gear; 13. Oil reservoir; 14. Oil inlet pipe; 15. Oil outlet pipe; 16. First check valve; 17. Second check valve; 18. Spray head; 19. Piston plate; 20. Return spring; 21. Compression cam; 22. Driven gear; 23. Drive lever; 24. Heat dissipation fins; 25. Cooling fan; 26. First ventilation hole; 27. Second ventilation hole; 28. Dustproof net; 29. ​​Fixing bracket; 30. Cleaning brush. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1-4To reduce wear, this embodiment provides the following technical solution: a cylindrical motor housing 1, with a front cover 2 and a rear cover 3 fixedly mounted at the front and rear ends of the motor housing 1 by bolts; a power supply cable 4 fixedly welded to the upper exterior of the motor housing 1; stator windings 5 ​​with equal angle distribution fixedly mounted inside the rear end of the motor housing 1; a matching rotor winding 6 provided inside the stator windings 5; a sealing cover 7 fixedly mounted inside the front end of the motor housing 1; an output shaft 11 and a planetary gear carrier 8 rotatably mounted at the left and right ends of the sealing cover 7, respectively; three internal gears 9 rotatably mounted on the side of the planetary gear carrier 8; the three internal gears 9 forming a planetary reduction structure; the interior of the sealing cover 7 is filled with liquid lubricating oil; the outer side of the internal gears 9 meshes with the outer gear 10 fixedly mounted on the inner wall of the sealing cover 7; and the inner side of the internal gears 9 meshes with the reduction gear 12; and the reduction gear 12 is fixedly welded to the output shaft 11.

[0038] The power supply cable 4 is used to connect the motor to the power supply. The electromagnetic induction phenomenon causes the rotor winding 6 to rotate inside the stator winding 5. During the rotation of the rotor winding 6, the planetary gear carrier 8 rotates synchronously. The planetary gear carrier 8 drives the internal gear 9 to rotate. At this time, the outer side of the internal gear 9 meshes with the outer gear 10 on the inner wall of the sealing cover 7. At the same time, the inner side of the internal gear 9 meshes with the reduction gear 12. The reduction gear 12 drives the output shaft 11 to rotate at a reduced speed, ultimately achieving the purpose of driving the equipment. The sealing cover 7 is filled with an appropriate amount of liquid lubricating oil. The lubricating oil adheres to the outer side of the internal gear 9, the outer gear 10 and the reduction gear 12 to achieve the purpose of lubrication and reduce wear.

[0039] Example 2: Please refer to Figures 9-11 In order to achieve the purpose of cooling and dust prevention, this embodiment provides the following technical solution, which specifically discloses: a cooling fan 25 is fixedly installed on the external side of the rear shaft of the rotor winding 6, a first ventilation hole 26 is opened inside the rear cover 3, and a second ventilation hole 27 is opened on the side of the middle position of the motor housing 1. The first ventilation hole 26 and the second ventilation hole 27 cooperate with the cooling fan 25 to form a heat dissipation air duct. A dustproof net 28 with a ring structure is attached to the inner wall of the motor housing 1, and the position of the dustproof net 28 corresponds to the position of the second ventilation hole 27. The dustproof net 28 is fixedly connected to the planetary gear carrier 8 through the fixing bracket 29 on its inner side, and the dustproof net 28 and the motor housing 1 form a rotating structure. The outer surface of the dustproof net 28 is attached to the cleaning brush 30, and the cleaning brush 30 is fixedly installed inside the second ventilation hole 27.

[0040] During the rotation of the rotor winding 6, the cooling fan 25 at its rear end rotates. The cooling fan 25 drives the airflow, forming an air duct between the first ventilation hole 26 and the second ventilation hole 27 (air enters through the second ventilation hole 27 and exits through the first ventilation hole 26), thus achieving the purpose of heat dissipation inside the motor housing 1. During this process, the dustproof net 28 inside the motor housing 1 prevents dust from entering the motor housing 1 through the second ventilation hole 27. As the planetary gear carrier 8 rotates, the dustproof net 28 rotates through its external fixing bracket 29. During the rotation of the dustproof net 28, it comes into contact with the cleaning brush 30 fixedly installed inside the second ventilation hole 27, thereby using the cleaning brush 30 to clean the dust on the surface of the dustproof net 28, preventing dust from clogging the dustproof net 28 and affecting subsequent heat dissipation.

[0041] Example 3: Please refer to Figures 5-8 To achieve the purpose of circulating and cooling lubricating oil, this embodiment provides the following technical solution, specifically: an oil storage box 13 and a spray head 18 are fixedly installed inside the sealing cover 7, and the sealing cover 7 and the spray head 18 are provided with a circulation mechanism for cooling the lubricating oil. The circulation mechanism includes an oil inlet pipe 14 and an oil outlet pipe 15 fixedly installed through the side of the oil storage box 13. A first one-way valve 16 is fixedly installed outside the oil inlet pipe 14, and a second one-way valve 17 is fixedly installed outside the oil outlet pipe 15. The oil outlet pipe 15 extends to the outside of the sealing cover 7 and connects with the spray head 18. The oil outlet pipe 15 has a bent structure, and an aluminum alloy heat sink that penetrates the oil outlet pipe 15 is fixedly installed outside the sealing cover 7. The fins 24 and heat dissipation fins 24 are evenly spaced. The piston plate 19 is horizontally mounted and slidably installed inside the oil storage box 13. A return spring 20 is fixedly installed between the upper surface of the piston plate 19 and the inner wall of the oil storage box 13. The height of the piston plate 19 is always higher than the bottom end of the oil outlet pipe 15. A compression cam 21 is rotatably installed inside the oil storage box 13 above the piston plate 19. A driven gear 22 located outside the oil storage box 13 is fixedly installed on the front side of the compression cam 21. The position of the driven gear 22 corresponds vertically to the position of the planetary gear carrier 8. A drive pawl 23 is fixedly installed on the outside of the planetary gear carrier 8. The drive pawl 23 and the driven gear 22 mesh with each other.

[0042] During the rotation of the planetary gear carrier 8, the externally fixed drive pawl 23 intermittently contacts and actuates the driven gear 22. The rotation of the driven gear 22 drives the coaxially fixed compression cam 21 to rotate synchronously. The compression cam 21 moves the piston plate 19 downwards, and then the elastic pull of the return spring 20 returns the piston plate 19 upwards. This causes the piston plate 19 to move up and down repeatedly. When the piston plate 19 moves upwards, a negative pressure is formed inside the oil reservoir 13, thereby drawing some of the lubricating oil from inside the sealing cover 7 into the oil reservoir 13 through the oil inlet pipe 14 (at this time, the first...). One-way valve 16 ensures that lubricating oil can only enter and not exit. When piston plate 19 moves downward, it uses extrusion force to squeeze the lubricating oil inside oil reservoir 13 into oil outlet pipe 15 (the second one-way valve 17 outside oil outlet pipe 15 ensures that lubricating oil can only exit and not enter). During the flow of lubricating oil in oil outlet pipe 15, the airflow driven by cooling fan 25 cools it down (the cooling fins 24 can increase the heat dissipation speed and achieve better heat dissipation). The cooled lubricating oil is sprayed out from spray head 18, so that the lubricating oil can adhere more evenly to the gear, improve the lubrication effect, and the cooled lubricating oil can also cool the gear.

[0043] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-wear dust-proof reduction motor, comprising a motor housing (1) in a cylindrical structure, the motor housing (1) is fixedly installed with a front end cover (2) and a rear end cover (3) at the front and rear ends by bolts, characterized in that, Also include: The motor shell (1) upper end outside fixed welding power cable (4), and the motor shell (1) rear end inside fixed installation equiangular distribution stator winding (5), and the stator winding (5) inside is provided with the matching rotor winding (6); The motor shell (1) front end inside fixed installation sealing cover (7), and the sealing cover (7) left and right two ends are respectively rotatably installed output shaft (11) and planetary gear carrier (8), the planetary gear carrier (8) side rotatably installs three internal gear (9), three internal gear (9) constitute planetary reduction structure; The sealing cover (7) is filled with liquid lubricating oil, and the sealing cover (7) is fixedly installed with oil storage box (13) and spray head (18) inside, and the sealing cover (7) is provided with a circulating mechanism for cooling lubricating oil with spray head (18); The circulating mechanism includes an oil inlet pipe (14) and an oil outlet pipe (15) fixedly installed on the side surface of the oil storage box (13), a first one-way valve (16) is fixedly installed on the outside of the oil inlet pipe (14), and a second one-way valve (17) is fixedly installed on the outside of the oil outlet pipe (15), the oil outlet pipe (15) extends to the outside of the sealing cover (7) and is communicated with the spray head (18), the oil outlet pipe (15) is in a bent structure as a whole, and the sealing cover (7) is fixedly installed with an aluminum alloy heat dissipation fin (24) penetrating the oil outlet pipe (15) on the outside, the heat dissipation fins (24) are evenly arranged at equal intervals, a piston plate (19) is slidably installed in the oil storage box (13), a return spring (20) is fixedly installed between the upper surface of the piston plate (19) and the inner wall of the oil storage box (13), and the height of the piston plate (19) is always higher than the bottom end of the oil outlet pipe (15), a squeeze cam (21) is rotatably installed above the piston plate (19) in the oil storage box (13), a driven gear (22) is fixedly installed on the outside of the oil storage box (13) on the front side of the squeeze cam (21), the position of the driven gear (22) corresponds to the position of the planetary gear carrier (8) up and down, the planetary gear carrier (8) is fixedly installed with a driving tab (23) on the outside, and the driving tab (23) and the driven gear (22) are engaged with each other; The rotor winding (6) is fixedly installed with a cooling fan (25) on the outside of the shaft body at the rear end.

2. A low-wear dust-proof reduction motor according to claim 1, characterized in that: The internal gear (9) is engaged with an external gear (10) fixedly installed on the inner wall of the sealing cover (7) on the outside, and is engaged with a reduction gear (12) on the inside, and the reduction gear (12) is fixedly welded with the output shaft (11).

3. A low-wear dust-proof reduction motor according to claim 1, characterized in that: The rear end cover (3) is provided with a first ventilation hole (26) in the inside, and a second ventilation hole (27) is formed in the side surface of the motor shell (1) at the middle position, and the first ventilation hole (26) and the second ventilation hole (27) cooperate with the cooling fan (25) to form a cooling air duct.

4. A low-wear dust-proof reduction motor according to claim 3, characterized in that: The dustproof net (28) in annular structure is attached and installed on the inner wall of the motor shell (1), and the position of the dustproof net (28) corresponds to the position of the second ventilation hole (27).

5. A low-wear dust-proof reduction motor according to claim 4, characterized in that: The dustproof net (28) is fixedly connected with the planetary gear carrier (8) through the fixing frame (29) on the inner side of the dustproof net (28), and a rotating structure is formed between the dustproof net (28) and the motor shell (1), and the outer surface of the dustproof net (28) is attached with the cleaning brush (30), and the cleaning brush (30) is fixedly installed in the second ventilation hole (27).

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