A brushless planetary gear reduction motor

Abstract

The present invention discloses a brushless planetary gear reduction motor, belonging to the technical field of planetary gear reduction motors, which includes a base, a heat dissipation component and a self-adjusting torque component. The upper surface of the base is fixedly connected with a housing, and the housing is provided with ventilation holes penetrating its inner and outer sides, and heat conduction strips are arranged on the outer side of the housing. One end of the motor winding is connected to the housing through a bearing, and the other end of the motor winding is coaxially fixedly connected to one end of the drive shaft. In this invention, not only a fan structure is provided inside, but also a water-cooled heat dissipation structure is provided, which can improve the efficiency and effect of heat dissipation, and avoid the problem that only a fan structure is set in the past, resulting in the circulation of hot air inside and outside the housing, thus leading to poor heat dissipation efficiency and effect. In addition, when the motor starts, the torque is relatively large, so as to reduce the difficulty of starting the motor. After the motor starts, the torque gradually decreases to improve the strength of the structure and avoid the reduction of strength caused by too long torque.

Description

Technical Field

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

[0002] In the fields of industrial production and mechanical transmission, it is often necessary to convert the high rotational speed of a motor into an appropriate low rotational speed and simultaneously increase the output torque to meet the working requirements of various equipment. Traditional speed reducers have problems such as large volume, low efficiency, and limited transmission ratio range, and cannot well meet the needs of modern industry for high-efficiency, compact, and high-performance transmission devices. Therefore, it has promoted the development of planetary gear reduction motors;

[0003] By using a planetary gear reduction motor, the rotational speed of the output shaft can be reduced and the torque of the output shaft can be increased.

[0004] When the existing planetary gear reduction motors are in use, there are still the following technical problems, such as:

[0005] 1. When the existing planetary gear reduction motors are in use, heat is generated inside them. Although there are heat dissipation holes on the outer shell of the reduction motor, its heat dissipation effect is not good, and it cannot quickly cool the inside of the motor. In addition, although some planetary gear reduction motors are provided with a fan structure, their heat dissipation efficiency is also not good;

[0006] 2. When the existing planetary gear reduction motors are in use, starting is difficult. This is because when the motor is in a static state, there is a large static friction force between components such as the shaft and the bearing, and the rotor and the stator. When the motor starts, it needs to overcome this friction force to start rotating. Once the motor starts rotating, the friction force will change into a dynamic friction force. Usually, the dynamic friction force is less than the static friction force, so it will cause the motor to be difficult to start;

[0007] Therefore, a brushless planetary gear reduction motor is needed to solve the above problems. Summary of the Invention

[0008] The purpose 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 difficult starting of the existing planetary gear reduction motors mentioned in the above background art.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] A brushless planetary gear reduction motor, comprising a base, a heat dissipation component and a self-adjusting torque component. The upper surface of the base is fixedly connected with a housing, and the housing is provided with air holes penetrating through its inner and outer sides, and a heat conducting strip is arranged on the outer side of the housing. One end of the motor winding is connected to the housing through a bearing, and the other end of the motor winding is coaxially fixedly connected with one end of a driving shaft. A heat dissipation component is installed in the middle of the driving shaft, and the other end of the driving shaft penetrates through a porous connecting plate through a bearing. A driving gear is key-connected to the other end of the driving shaft, and three transmission gears are meshed with the outer side of the driving gear at equal angles. Each transmission gear is connected to a transmission shaft through a bearing, and one ends of the three transmission shafts penetrate through the connecting plate through bearings. The three transmission gears are also meshed with the inner side of an internal gear ring, and the internal gear ring is fixedly connected to the inside of the housing. The transmission gears and the driving gear are connected to an installation plate through a self-adjusting torque component, and the installation plate is connected to the inside of the housing through a bearing. An output shaft is coaxially fixedly connected to the installation plate, and the output shaft penetrates through the housing through a bearing.

[0011] Preferably, the axes of the installation plate, the internal gear ring, the motor winding and the housing are collinear.

[0012] Preferably, the heat dissipation component includes a fan blade, a copper pipe, a connecting pipe, a one-way valve, a piston pipe, a support block, a piston rod and a connecting sleeve. Fan blades are installed on the driving shaft at equal angles, and a connecting sleeve is connected to the driving shaft through a bearing. One end of a piston rod is fixedly connected to the connecting sleeve, and the other end of the piston rod is slidably connected to the inside of the piston pipe without a seam. The piston pipe is fixedly connected to the inner side of the housing through a support block, and a copper pipe is arranged on the inner side of the housing. The head and tail ends of the copper pipe are connected through a connecting pipe, and two one-way valves are arranged inside the connecting pipe. The inside between the two one-way valves is connected to the piston pipe through a penetration.

[0013] Preferably, the copper pipe is spiral-shaped, a spiral groove is arranged on the inner side of the housing, and the copper pipe is installed in the spiral groove.

[0014] Preferably, the two one-way valves are a one-way liquid inlet valve and a one-way liquid discharge valve respectively.

[0015] Preferably, the middle part of the driving shaft is of an n-shaped structure, and the connecting sleeve is connected to the outside of the n-shaped structure through a bearing.

[0016] Preferably, the self-adjusting torque assembly includes a connecting rod, a limiting rod, a slider, a strip-shaped through hole, a first spring, a bushing, a pressing block, a second spring, a top block and a bearing block. On the outer side of the other end of the driving shaft, top blocks are arranged at equal angles, and one bearing block is slidably connected to each top block. The bearing blocks are fixedly connected to the outer side of the bushing at equal angles, and one end of the bushing is connected to the driving gear through the second spring. The second spring is sleeved on the outer side of the driving shaft. A pressing block is coaxially and damping-bearing-connected to the bushing, and connecting rods are slidably contacted with the outer side of the pressing block at equal angles. Each connecting rod movably penetrates through the corresponding transmission shaft, and a slider is fixedly connected to each connecting rod. The slider is slidably connected to the strip-shaped through hole, and the strip-shaped through holes are arranged on the mounting plate at equal angles. A limiting rod is fixedly connected in the strip-shaped through hole, and the limiting rod movably penetrates through the corresponding slider. A first spring nested on the outer side of the limiting rod is arranged between the slider and the inner end of the strip-shaped through hole.

[0017] Preferably, the pressing block is of a frustum structure, and the diameter of the side of the pressing block close to the mounting plate is larger than that of the other side.

[0018] Preferably, the tooth number ratio of the driving gear to the transmission gear is less than 1.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The brushless planetary gear reduction motor not only has a fan structure inside it, but also has a water-cooling heat dissipation structure, which can improve the efficiency and effect of heat dissipation, and avoid the problem that only a fan structure is set in the past, resulting in the circulation of hot air inside and outside the housing, thus leading to poor heat dissipation efficiency and effect. In addition, when the motor starts, the torque is large, so that the difficulty of starting the motor can be reduced. After the motor starts, the torque gradually decreases to facilitate the improvement of the strength of the structure and avoid the reduction of strength caused by too long torque.

[0020] 1. During the rotation of the driving shaft, it not only drives the fan blades to rotate, so that the air inside and outside the housing can circulate, but also drives the piston rod to reciprocate, and cooperates with the one-way valve to repeatedly suck and discharge the coolant in the copper tube, so as to quickly cool the circulating air and improve the cooling effect and efficiency.

[0021] 2. At the beginning of the motor startup, the rotation speed of the driving shaft is slow, and the slider is far from the axis of the mounting plate, so that the torque can be increased to reduce the difficulty of starting the motor. When the rotation speed of the driving shaft reaches a certain value, through centrifugal force, the top block can be made to squeeze the bearing block to move upward, and then drive the pressing block to move upward, so that the connecting rod moves towards the end with a smaller diameter of the pressing block. At the same time, through the first spring, the slider will be close to the axis of the mounting plate. Although the torque is reduced, the strength of the connection structure between the slider and the mounting plate is improved, ensuring that the output shaft can rotate smoothly and stably. Description of the Drawings

[0022] Figure 1 Schematic front view structure diagram of the present invention;

[0023] Figure 2 Schematic sectional view structure diagram of the present invention;

[0024] Figure 3 For the present invention Figure 2 Schematic enlarged structure diagram of point A therein;

[0025] Figure 4 Schematic partial sectional view structure diagram of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic enlarged structure diagram of point B therein;

[0027] Figure 6 Schematic connection structure diagram of the output shaft and the motor winding of the present invention;

[0028] Figure 7 Schematic connection structure diagram of the drive shaft and the output shaft of the present invention;

[0029] Figure 8 For the present invention Figure 7 Schematic enlarged structure diagram of point C therein.

[0030] In the figure: 1, base; 2, housing; 3, ventilation hole; 4, heat conducting strip; 5, output shaft; 6, motor winding; 7, drive shaft; 8, fan blade; 9, copper tube; 10, internal gear ring; 11, drive gear; 12, transmission shaft; 13, connecting plate; 14, transmission gear; 15, connecting rod; 16, limiting rod; 17, slider; 18, strip-shaped through hole; 19, first spring; 20, mounting plate; 21, bushing; 22, extrusion block; 23, communicating pipe; 24, one-way valve; 25, piston tube; 26, support block; 27, piston rod; 28, connecting sleeve; 29, second spring; 30, top block; 31, bearing block. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-8 , the present invention provides the following technical solutions:

[0033] Embodiment 1: To solve the problem that the heat dissipation efficiency and effect of the conventional planetary gear reduction motor are not good, the following technical solutions are provided. Specifically,

[0034] A brushless planetary gear reduction motor includes a base 1, a heat dissipation component, and a self-adjusting torque component. The upper surface of the base 1 is fixedly connected to a housing 2. The housing 2 is provided with ventilation holes 3 that penetrate both its inner and outer sides. A heat conduction strip 4 is provided on the outer side of the housing 2. One end of a motor winding 6 is connected to the housing 2 by a bearing, and the other end of the motor winding 6 is coaxially and fixedly connected to one end of a drive shaft 7. A heat dissipation component is installed in the middle of the drive shaft 7, and the other end of the drive shaft 7 passes through a porous connection disk 13 by a bearing.

[0035] The axes of the mounting disk 20, the internal gear ring 10, the motor winding 6, and the housing 2 are collinear. The heat dissipation component includes a fan blade 8, a copper tube 9, a connecting pipe 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 blades 8 are installed on the drive shaft 7 at equal angles. The connecting sleeve 28 is connected to the drive shaft 7 by a bearing. 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 slidably connected to the inside of the piston tube 25 without a gap. The piston tube 25 is fixedly connected to the inner side of the housing 2 through the support block 26. A copper tube 9 is provided on the inner side of the housing 2. The head and tail ends of the copper tube 9 are connected through the connecting pipe 23. Two one-way valves 24 are provided inside the connecting pipe 23. The piston tube 25 is connected to the space between the two one-way valves 24. The copper tube 9 is spiral-shaped. A spiral groove is provided on the inner side of the housing 2, 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 drive shaft 7 is of an n-shaped structure, and the connecting sleeve 28 is connected to the outside of the n-shaped structure by a bearing. By rotating the drive shaft 7, the fan blade 8 can be rotated, so that the air on both the inner and outer sides of the housing 2 can be exchanged, which helps with heat dissipation. At the same time, when the drive shaft 7 rotates, the piston rod 27 will also move reciprocally. 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 helps to improve the efficiency and effect of heat dissipation, and also avoids the problem that the temperature of the air inhaled into the housing 2 gradually rises, resulting in an insignificant effect on the motor cooling.

[0036] Embodiment 2: To solve the problem that it was difficult for the planetary gear reduction motor to start in the past, the following technical solution is provided. Specifically, a driving gear 11 is key-connected to the other end of the driving shaft 7, and three transmission gears 14 are meshed and connected to the outside of the driving gear 11 at equal angles. A transmission shaft 12 is connected through the bearing on each transmission gear 14, and one ends of the three transmission shafts 12 are all connected through the bearing to the mounting plate 13. The three transmission gears 14 are also meshed and connected to the inner side of the internal gear ring 10, and the internal 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 assembly, and the mounting plate 20 is connected to the inside of the housing 2 through a bearing. An output shaft 5 is coaxially and fixedly connected to the mounting plate 20, and the output shaft 5 passes through the housing 2 through a bearing.

[0037] The self-adjusting torque assembly includes a connecting rod 15, a limiting rod 16, a slider 17, a strip-shaped through hole 18, a first spring 19, a bushing 21, an extrusion block 22, a second spring 29, a top block 30 and a bearing block 31. The outer side of the other end of the driving shaft 7 is provided with top blocks 30 at equal angles, and one bearing block 31 is slidably connected to each top block 30. The bearing blocks 31 are fixedly connected to the outside of the bushing 21 at equal angles, and one end of the bushing 21 is connected to the driving gear 11 through a second spring 29. The second spring 29 is sleeved on the outside of the driving shaft 7. An extrusion block 22 is connected to the bushing 21 through a coaxial damping bearing, and the outer side of the extrusion block 22 is slidably contacted with the connecting rod 15 at equal angles. Each connecting rod 15 passes through the corresponding transmission shaft 12 movably, and a slider 17 is fixedly connected to each connecting rod 15. The slider 17 is slidably connected to the strip-shaped through hole 18, and the strip-shaped through holes 18 are arranged on the mounting plate 20 at equal angles. A limiting rod 16 is fixedly connected to the strip-shaped through hole 18, and the limiting rod 16 passes through the corresponding slider 17 movably. A first spring 19 nested on the outside of the limiting rod 16 is arranged between the slider 17 and the inner end of the strip-shaped through hole 18. At the beginning of the motor operation, that is, when the output shaft 5 just rotates, since the slider 17 is far from the axis of the output shaft 5, the torque can be made larger, so as to facilitate resisting the static friction force and help the output shaft 5 to rotate, thus avoiding the problem that the motor was difficult to start in the past because it was necessary to convert the static friction force into the dynamic friction force. After the output shaft 5 rotates to a certain speed, through the centrifugal force, the top block 30 can effectively extrude the bearing block 31, so that the bearing block 31 drives the bushing 21 and the extrusion block 22 connected thereto to move upward, so that the slider 17 gradually approaches the output shaft 5 under the pulling of the first spring 19. Although the torque is reduced, the strength is increased, and the breakage of the slider 17 caused by the far distance between the slider 17 and the output shaft 5 is avoided, which helps to ensure the stable operation of the motor. The extrusion block 22 is of a frustum-shaped 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 thereof. The tooth number ratio of the driving gear 11 and the transmission gear 14 is less than 1.

[0038] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and 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). The inner bearing of the shell (2) is connected to one end of a motor winding (6), 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) is bearing-pierced through a porous connecting disk (13). 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 meshedly connected to three transmission gears (14) at equal angles, each of the transmission gears (14) is bearing-pierced through a transmission shaft (12), and one end of the three transmission shafts (12) is bearing-pierced through the connecting disk (13). The three transmission gears (14) are also meshedly connected to the inner side of an inner gear ring (10), and the inner gear ring (10) is fixedly connected to the inner side of the inner gear ring (10). The transmission gear (14) and the driving gear (11) are connected to the mounting plate (20) via a self-adjusting torque assembly, and the mounting plate (20) is connected to the housing (2) via a bearing. The self-adjusting torque assembly comprises a top block (30), the top block (30) is arranged at an equal angle outside the other end of the driving shaft (7), and each top block (30) is slidably connected to a pressure block (31), and the pressure block (31) is fixedly connected to the shaft sleeve at an equal angle. The outer side of the shaft sleeve (21) is connected to the driving gear (11) through a second spring (29), and the second spring (29) is sleeved on the outer side of the driving shaft (7). The shaft sleeve (21) is coaxially connected to the damping bearing with an extrusion block (22), and the outer side of the extrusion block (22) is connected to a connecting rod (15) in an equiangular sliding contact manner. The mounting plate (20) is coaxially fixedly connected to the output shaft (5), and the bearing of the output shaft (5) is arranged 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 further comprises a connecting rod (15), each of the connecting rods (15) being movably connected to a corresponding transmission shaft (12), and each of the connecting rods (15) being fixedly connected to a slider (17), the slider (17) being slidably connected to a bar-shaped through hole (18), and the bar-shaped through holes (18) being arranged at equal angles on a mounting plate (20), a limiting rod (16) being fixedly connected inside the bar-shaped through hole (18), and the limiting rod (16) being movably connected to a corresponding slider (17), and a spring (19) being nested on the outside of the limiting rod (16) being arranged between the slider (17) and the inner end of the bar-shaped through hole (18).

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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