Brushless planetary gear speed reducing motor

Abstract

The invention discloses a brushless planetary gear speed reducing motor, and belongs to the technical field of planetary gear speed reducing motors, the brushless planetary gear speed reducing motor comprises a base, a heat dissipation assembly and a torque self-adjusting assembly, the upper surface of the base is fixedly connected with a shell, the shell is provided with an air hole penetrating through the inner side and the outer side of the shell, and the outer side of the shell is provided with a heat conduction strip; a bearing in the shell is connected with one end of a motor winding, and the other end of the motor winding is coaxially and fixedly connected with one end of a driving shaft. According to the motor, the fan structure and the water-cooling heat dissipation structure are arranged inside the motor, so that the heat dissipation efficiency and effect can be improved, and the problem that the heat dissipation efficiency and effect are poor due to the fact that only the fan structure is arranged in the past and hot air circulates inside and outside the shell is solved; and after the motor is started, the torque is gradually reduced, so that the strength of the structure is improved, and the situation that the strength is reduced due to the fact that the torque is too long is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of planetary gear reduction motors, in particular to a brushless planetary gear reduction motor. Background Art

[0002] In the field of industrial production and mechanical transmission, it is often necessary to convert the high speed of the motor into a suitable low speed and increase the output torque at the same time to meet the working requirements of various equipment. Traditional reducers have problems such as large size, low efficiency, and limited transmission ratio range. They cannot well meet the needs of modern industry for efficient, compact, and high-performance transmission devices, which has promoted the development of planetary gear reduction motors. The purpose of reducing the output shaft speed and increasing the output shaft torque can be achieved through the planetary gear reduction motor; The existing planetary gear reduction motor still has the following technical problems when in use, such as: 1. When the existing planetary gear reduction motor is in use, heat is generated inside. Although the shell of the reduction motor is provided with heat dissipation holes, the heat dissipation effect is not good and the inside of the motor cannot be quickly cooled. In addition, although some planetary gear reduction motors are provided with fan structures, the heat dissipation efficiency is not good; 2. The existing planetary gear reduction motor is difficult to start when in use. This is because when the motor is stationary, there is a large static friction between the shaft and bearings, rotor and stator and other components. When the motor starts, it needs to overcome this friction before it can start to rotate. Once the motor starts to rotate, the friction will be converted into dynamic friction. Usually, the dynamic friction is smaller than the static friction, so it will make the motor difficult to start; Therefore, a brushless planetary gear reduction motor is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a brushless planetary gear reduction motor to solve the problems of poor heat dissipation efficiency and effect and difficulty in starting of the existing planetary gear reduction motors mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A brushless planetary gear reduction motor comprises a base, a heat dissipation assembly and a self-adjusting torque assembly, wherein the upper surface of the base is fixedly connected to a shell, and the shell is provided with air vents penetrating both sides thereof, and a heat conducting strip is provided on the outer side of the shell, one end of the motor winding is connected to a bearing in the shell, and the other end of the motor winding is coaxially fixedly connected to one end of a drive shaft, a heat dissipation assembly is installed on the middle part of the drive shaft, and the other end bearing of the drive shaft passes through a porous connecting disk, the other end of the drive shaft is keyed to a drive gear, and three transmission gears are meshed and connected at equal angles on the outer side of the drive gear, each of the transmission gears is connected to a transmission shaft through a bearing, and one end of the three transmission shafts is provided with a bearing passing through the connecting disk, the three transmission gears are also meshed and connected to the inner side of an inner gear ring, and the inner gear ring is fixedly connected to the inside of the shell, the transmission gear and the drive gear are connected to the mounting disk through the self-adjusting torque assembly, and the mounting disk bearing is connected to the inside of the shell, the mounting disk is coaxially fixedly connected to an output shaft, and the output shaft bearing passes through the shell.

[0005] Preferably, the axes of the mounting plate, the inner gear ring, the motor winding and the housing are collinear.

[0006] Preferably, the heat dissipation assembly includes fan blades, copper tubes, connecting tubes, one-way valves, piston tubes, support blocks, piston rods and connecting sleeves, the fan blades are installed at equal angles on the drive shaft, and the connecting sleeve is connected to the bearing on the drive shaft, one end of the piston rod is fixedly connected to the connecting sleeve, and the other end of the piston rod is seamlessly slidably connected to the inside of the piston tube, the piston tube is fixedly connected to the inner side of the shell through the support block, and a copper tube is provided on the inner side of the shell, the head and tail ends of the copper tube are through-connected by a connecting tube, and two one-way valves are provided inside the connecting tube, and the two one-way valves are through-connected with the piston tube.

[0007] Preferably, the copper tube is spiral-shaped, a spiral groove is provided on the inner side of the shell, and the copper tube is installed in the spiral groove.

[0008] Preferably, the two one-way valves are a one-way liquid inlet valve and a one-way liquid discharge valve respectively.

[0009] Preferably, the middle portion of the drive shaft is an n-shaped structure, and the connecting sleeve bearing is connected to the outer side of the n-shaped structure.

[0010] Preferably, the self-adjusting torque assembly comprises a connecting rod, a limiting rod, a slider, a strip through hole, a spring 1, a sleeve, an extrusion block, a spring 2, a top block and a pressure block, a top block is arranged at an equal angle on the outside of the other end of the driving shaft, and each top block is slidably connected with a pressure block, the pressure block is fixedly connected to the outside of the sleeve at an equal angle, and one end of the sleeve is connected to the driving gear through a spring 2, the spring 2 is sleeved on the outside of the driving shaft, the coaxial damping bearing on the sleeve is connected with an extrusion block, and the outside of the extrusion block is connected with a connecting rod in equal angle sliding contact, each of the connecting rods movably passes through the corresponding transmission shaft arrangement, and each connecting rod is fixedly connected with a slider, the slider is slidably connected to the strip through hole, and the strip through holes are equiangularly arranged on the mounting plate, the limiting rod is fixedly connected in the strip through hole, and the limiting rod movably passes through the corresponding slider arrangement, and a spring 1 nested in the outside of the limiting rod is arranged between the slider and the inner end of the strip through hole.

[0011] Preferably, the extrusion block is a truncated cone structure, and the diameter of one side of the extrusion block close to the mounting plate is larger than the diameter of the other side.

[0012] Preferably, the gear ratio between the driving gear and the transmission gear is less than 1.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the brushless planetary gear reduction motor is not only provided with a fan structure but also with a water-cooled heat dissipation structure, which can improve the efficiency and effect of heat dissipation, and avoid the problem that only the fan structure is provided in the past, causing hot air to circulate inside and outside the shell, thereby causing poor heat dissipation efficiency and effect. In addition, when the motor is started, the torque is large, thereby reducing the difficulty of starting the motor. After the motor is started, the torque gradually decreases, so as to improve the strength of the structure and avoid excessive torque, which leads to reduced strength: 1. During the rotation of the drive shaft, it not only drives the fan blades to rotate, thereby allowing the air inside and outside the shell to circulate, but also drives the piston rod to move back and forth. In conjunction with the one-way valve, the coolant in the copper tube can be repeatedly sucked out and discharged, so as to quickly cool the circulating air and improve the cooling effect and efficiency; 2. At the beginning of the motor start-up, the driving shaft speed is slow and the slider is far away from the axis of the mounting disk, so that the torque can be increased to reduce the difficulty of starting the motor. When the driving shaft speed reaches a certain value, the centrifugal force can make the top block squeeze the pressure block to move upward, thereby driving the extrusion block to move upward, and the connecting rod moves to the end of the extrusion block with a smaller diameter. At the same time, the spring 1 will make the slider close to the axis of the mounting disk. Although the torque is reduced, the strength of the connection structure between the slider and the mounting disk is improved, ensuring that the output shaft can rotate smoothly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of point A; Figure 4 It is a schematic diagram of a partial cross-sectional structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of point B in the middle; Figure 6 This is a schematic diagram of the connection structure between the output shaft and the motor winding of the present invention; Figure 7 This is a schematic diagram of the connection structure between the drive shaft and the output shaft of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

[0015] In the figure: 1. base; 2. shell; 3. air vent; 4. heat conductive strip; 5. output shaft; 6. motor winding; 7. drive shaft; 8. fan blade; 9. copper tube; 10. inner gear ring; 11. drive gear; 12. transmission shaft; 13. connecting plate; 14. transmission gear; 15. connecting rod; 16. limit rod; 17. slider; 18. strip through hole; 19. spring one; 20. mounting plate; 21. bushing; 22. extrusion block; 23. connecting pipe; 24. one-way valve; 25. piston tube; 26. support block; 27. piston rod; 28. connecting sleeve; 29. ​​spring two; 30. top block; 31. pressure block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 8 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problem of poor heat dissipation efficiency and effect of the planetary gear reduction motor in the past, the following technical solution is provided, specifically, A brushless planetary gear reduction motor comprises a base 1, a heat dissipation component and a self-adjusting torque component, wherein a shell 2 is fixedly connected to the upper surface of the base 1, and the shell 2 is provided with air vents 3 penetrating both inside and outside thereof, and a heat conducting strip 4 is provided on the outside of the shell 2, one end of a motor winding 6 is connected to a bearing in the shell 2, and the other end of the motor winding 6 is coaxially fixedly connected to one end of a driving shaft 7, a heat dissipation component is installed on the middle part of the driving shaft 7, and the bearing at the other end of the driving shaft 7 passes through a porous connecting disk 13.

[0018] The axes of the mounting plate 20, the inner gear ring 10, the motor winding 6 and the housing 2 are colinear, and the heat dissipation assembly includes fan blades 8, copper tubes 9, connecting tubes 23, one-way valves 24, piston tubes 25, support blocks 26, piston rods 27 and connecting sleeves 28. The fan blades 8 are installed at equal angles on the drive shaft 7, and the connecting sleeves 28 are connected to the bearings on the drive shaft 7. One end of the piston rod 27 is fixedly connected to the connecting sleeve 28, and the other end of the piston rod 27 is seamlessly slidably connected to the inside of the piston tube 25. The piston tube 25 is fixedly connected to the inner side of the housing 2 through the support block 26, and the inner side of the housing 2 is provided with a copper tube 9, the head and tail ends of the copper tube 9 are connected through the connecting tube 23, and two one-way valves 24 are provided inside the connecting tube 23, and the two one-way valves 24 are connected through the piston tube 25. The copper tube 9 is spiral, and the inside of the housing 2 A spiral groove is arranged on the side, and the copper tube 9 is installed in the spiral groove. The two one-way valves 24 are a one-way liquid inlet valve and a one-way liquid discharge valve respectively. The middle part of the driving shaft 7 is an n-shaped structure, and the connecting sleeve 28 bearing is connected to the outside of the n-shaped structure. The fan blade 8 can be rotated by rotating the driving shaft 7, so that the air on both sides of the shell 2 can be exchanged, which is helpful for heat dissipation. At the same time, during the rotation of the driving shaft 7, it will also drive the piston rod 27 to move back and forth, so that through the cooperation of the one-way valve 24, the piston tube 25 continuously extracts the coolant in the tail end of the copper tube 9 and injects it into the head end of the copper tube 9, so that the coolant in the copper tube 9 flows, which is helpful to improve the efficiency and effect of heat dissipation, and also avoids the problem that the temperature of the air sucked into the shell 2 gradually increases, so that the cooling effect on the motor is not obvious.

[0019] Embodiment 2: In order to solve the problem that planetary gear reduction motors are difficult to start at the beginning, the following technical solution is provided. Specifically, the other end of the driving shaft 7 is keyed to a driving gear 11, and the outer side of the driving gear 11 is meshed with three transmission gears 14 at equal angles, each transmission gear 14 is connected with a transmission shaft 12 through a bearing, and one end of the three transmission shafts 12 is arranged through a connecting plate 13 through a bearing, and the three transmission gears 14 are also meshed and connected to the inner side of the inner gear ring 10, and the inner gear ring 10 is fixedly connected to the inside of the housing 2, the transmission gear 14 and the driving gear 11 are connected to the mounting plate 20 through a self-adjusting torque component, and the mounting plate 20 is connected to the inside of the housing 2 through a bearing, and the mounting plate 20 is coaxially fixedly connected to the output shaft 5, and the output shaft 5 bearing is arranged through the housing 2.

[0020] The self-adjusting torque assembly includes a connecting rod 15, a limiting rod 16, a slider 17, a bar-shaped through hole 18, a spring 19, a sleeve 21, an extrusion block 22, a spring 29, a top block 30 and a pressure block 31. The other end of the drive shaft 7 is provided with a top block 30 at an equal angle on the outside, and each top block 30 is slidably connected to a pressure block 31. The pressure block 31 is fixedly connected to the outside of the sleeve 21 at an equal angle, and one end of the sleeve 21 is connected to the driving gear 11 through a spring 29. The spring 29 is sleeved on the outside of the drive shaft 7. The coaxial damping bearing on the sleeve 21 is connected to an extrusion block 22, and the outer side of the extrusion block 22 is connected to a connecting rod 15 in sliding contact at equal angles. Each connecting rod 15 is movably penetrated through the corresponding transmission shaft 12, and each connecting rod 15 is fixedly connected to a slider 17, which is slidably connected to a bar through hole 18, and the bar through hole 18 is equiangularly arranged on the mounting plate 20. A limit rod 16 is fixedly connected in the bar through hole 18, and the limit rod 16 is movably penetrated through the corresponding slider 17, and the slider 17 is connected to the inner end of the bar through hole 18. A spring 19 is provided between the parts and is nested on the outside of the limit rod 16. At the beginning of the motor operation, that is, when the output shaft 5 just rotates, since the slider 17 is far away from the axis of the output shaft 5, the torque can be large, which makes it easier to resist the static friction and helps the output shaft 5 to rotate, thereby avoiding the problem of difficult starting of the motor at the beginning of the start-up due to the need to convert the static friction into dynamic friction. After the output shaft 5 rotates to a certain speed, the centrifugal force can be used to make the top block 30 effectively squeeze the pressure block 31 , so that the pressure block 31 drives the sleeve 21 and the extrusion block 22 connected thereto to move upward, so that the slider 17 gradually approaches the output shaft 5 under the pull of the spring 19. Although the torque is reduced, the strength is increased, which avoids the slider 17 from breaking due to the slider 17 being far away from the output shaft 5, and helps to ensure the stable operation of the motor. The extrusion block 22 is a truncated cone structure, and the diameter of the side of the extrusion block 22 close to the mounting plate 20 is larger than the diameter of the other side. The gear ratio of the driving gear 11 and the transmission gear 14 is less than 1.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless planetary gear reduction motor, comprising a base (1), a heat dissipation component and a self-adjusting torque component, characterized in that: The upper surface of the base (1) is fixedly connected to a shell (2), and the shell (2) is provided with air holes (3) penetrating both sides thereof, and a heat conducting strip (4) is provided on the outer side of the shell (2), one end of a motor winding (6) is connected to a bearing inside the shell (2), and the other end of the motor winding (6) is coaxially fixedly connected to one end of a drive shaft (7), a heat dissipation component is installed on the middle of the drive shaft (7), and the other end of the drive shaft (7) passes through a porous connecting plate (13), and the other end of the drive shaft (7) is key-connected to a drive gear (11), and the outer side of the drive gear (11) is meshed with three transmission gears at equal angles. (14), each of the transmission gears (14) is connected to a transmission shaft (12) by a bearing, and one end of the three transmission shafts (12) is connected to a connecting plate (13) by a bearing, and the three transmission gears (14) are also meshedly connected to the inner side of the inner gear ring (10), and the inner gear ring (10) is fixedly connected to the inside of the housing (2), the transmission gear (14) and the drive gear (11) are connected to the mounting plate (20) through a self-adjusting torque component, and the mounting plate (20) is connected to the inside of the housing (2) by a bearing, and the mounting plate (20) is coaxially fixedly connected to an output shaft (5), and the output shaft (5) bearing is set to pass through the housing (2).

2. A brushless planetary gear reduction motor according to claim 1, characterized in that: The axes of the mounting plate (20), the inner gear ring (10), the motor winding (6) and the housing (2) are collinear.

3. A brushless planetary gear reduction motor according to claim 2, characterized in that: The heat dissipation component comprises a fan blade (8), a copper tube (9), a connecting tube (23), a one-way valve (24), a piston tube (25), a support block (26), a piston rod (27) and a connecting sleeve (28); the fan blade (8) is mounted at an equal angle on the drive shaft (7); the connecting sleeve (28) is connected to a bearing on the drive shaft (7); one end of the piston rod (27) is fixedly connected to the connecting sleeve (28); the other end of the piston rod (27) is seamlessly slidably connected to the inside of the piston tube (25); the piston tube (25) is fixedly connected to the inside of the shell (2) through the support block (26); the inside of the shell (2) is provided with a copper tube (9); the head and tail ends of the copper tube (9) are connected through the connecting tube (23); two one-way valves (24) are provided inside the connecting tube (23); the two one-way valves (24) are connected through the piston tube (25).

4. A brushless planetary gear reduction motor according to claim 3, characterized in that: The copper tube (9) is spiral-shaped, a spiral groove is provided on the inner side of the shell (2), and the copper tube (9) is installed in the spiral groove.

5. The brushless planetary gear reduction motor according to claim 4, characterized in that: The two one-way valves (24) are respectively a one-way liquid inlet valve and a one-way liquid discharge valve.

6. A brushless planetary gear reduction motor according to claim 5, characterized in that: The middle portion of the driving shaft (7) is an n-shaped structure, and the connecting sleeve (28) is bearing-connected to the outer side of the n-shaped structure.

7. The brushless planetary gear reduction motor according to claim 6, characterized in that: The self-adjusting torque assembly comprises a connecting rod (15), a limiting rod (16), a sliding block (17), a bar-shaped through hole (18), a spring 1 (19), a shaft sleeve (21), an extrusion block (22), a spring 2 (29), a top block (30) and a pressure block (31); a top block (30) is arranged at an equal angle on the outer side of the other end of the driving shaft (7); and each top block (30) is slidably connected to a pressure block (31); the pressure blocks (31) are fixedly connected to the outer side of the shaft sleeve (21) at an equal angle, and one end of the shaft sleeve (21) is connected to the driving gear (11) via a spring 2 (29); the spring 2 (29) is sleeved on the outer side of the driving shaft (7); and a coaxial damping block (31) is arranged on the shaft sleeve (21). The bearing is connected to an extrusion block (22), and the outer side of the extrusion block (22) is connected to a connecting rod (15) in sliding contact at an equal angle, each of the connecting rods (15) is movably penetrated through a corresponding transmission shaft (12), and each of the connecting rods (15) is fixedly connected to a slider (17), the slider (17) is slidably connected to a bar-shaped through hole (18), and the bar-shaped through hole (18) is equiangularly arranged on a mounting plate (20), a limiting rod (16) is fixedly connected inside the bar-shaped through hole (18), and the limiting rod (16) is movably penetrated through a corresponding slider (17), and a spring (19) is arranged between the slider (17) and the inner end of the bar-shaped through hole (18) and is nested on the outer side of the limiting rod (16).

8. The brushless planetary gear reduction motor according to claim 7, characterized in that: The extrusion block (22) is a truncated cone-shaped structure, and the diameter of one side of the extrusion block (22) close to the mounting plate (20) is larger than the diameter of the other side.

9. The brushless planetary gear reduction motor according to claim 8, characterized in that: The gear ratio between the driving gear (11) and the transmission gear (14) is less than 1.

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