CN112196951B - Planetary speed reducer - Google Patents

Abstract

The present invention belongs to the technical field of planetary reducers, especially a planetary reducer. The following solution is proposed, which includes a shell, a drive shaft is rotatably connected to one side of the shell, and one end of the drive shaft extends into the shell. And a sun gear is fixedly installed. The outer side of the sun gear is annularly meshed with four equidistantly arranged planetary gears, and the outer sides of the four planetary gears are meshed with the same ring gear. The top and bottom of the ring gear are respectively It is fixedly connected to the top inner wall and the bottom inner wall of the casing, and the same rotating disk is fixedly installed on one side of the four planetary gears. The rotating disk is annularly slidingly connected to the inner wall of the casing. The invention is easy to operate, and the four planetary gears can be The overall performance of the reducer body is improved. At the same time, a structure is provided in the casing to facilitate the disassembly of the output shaft, which effectively facilitates manual replacement or maintenance of the output shaft.

Description

A planetary reducer

Technical field

The present invention relates to the technical field of planetary reducers, and in particular to a planetary reducer.

Background technique

Planetary reducer is a widely used industrial product that can reduce the speed of the motor and increase the output torque at the same time. Planetary reducers can be used as supporting components in lifting, excavation, transportation, construction and other industries.

The current planetary reducer has the following two shortcomings: 1. The internal structure of the planetary reducer generally uses three planetary gears for transmission. This design has low transmission efficiency. 2. The output shaft of the current planetary reducer needs to be replaced in time when it breaks during the process of outputting power. The replacement structure is more complicated and has certain inconvenience. At the same time, the temperature of the planetary reducer is high during use, and the planetary reducer The internal heat dissipation structure of the machine is simple and the effect is poor. In view of the above problems, we propose a planetary reducer to solve the above problems.

Contents of the invention

The purpose of the present invention is to propose a planetary reducer in order to solve the shortcomings existing in the prior art.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A planetary reducer includes a casing. One side of the casing is rotatably connected to a drive shaft. One end of the drive shaft extends into the casing and is fixedly mounted with a sun gear. The outer side of the sun gear is annularly meshed with equidistant Four planetary gears are arranged, and the outer sides of the four planetary gears are meshed with the same ring gear. The top and bottom of the ring gear are fixedly connected to the top inner wall and the bottom inner wall of the housing respectively. One side of the four planetary gears is fixed. The same rotating disk is installed, and the rotating disk is annularly slidingly connected to the inner wall of the housing. A first braking gear is fixedly installed at the center of one side of the rotating disk, and a second braking gear is meshed with the inside of the first braking gear. Brake gear, one side of the second brake gear is fixedly connected to an output shaft, one end of the output shaft extends to the outside of the housing and is rotationally connected to the outside of the housing, and one side of the rotating disk is fixedly mounted with a symmetrical Two support blocks are provided, and the output shaft is located between the two support blocks. The output shaft is provided with an internally threaded sleeve. The inner ring of the internally threaded sleeve is threadedly connected with an externally threaded rod, and the externally threaded rod Penetrating the support block, the ends of the two externally threaded rods that are close to each other are rotatably connected with arc-shaped clamping plates. The sides of the two arc-shaped clamping plates that are far away from each other are fixed with a limiting component, and the limiting component and one side of the supporting block are fixed. Fixed connection, the sides of the two arc-shaped clamping plates that are close to each other are engaged with the outside of the output shaft, and the housing is fixedly connected with a connected heat dissipation component.

Preferably, the rotating plate is threaded with four fixing bolts arranged in an annular and equidistant manner, and one end of the four fixing bolts respectively penetrates the four planetary gears and is threadedly connected to the four planetary gears. The fixing bolts are threaded A fixing nut is connected, and one side of the fixing nut fits the outside of the planetary gear. The four planetary gears can be fixedly connected to the rotating disk by using fixing bolts and fixing bolts, so that when the planetary gears rotate, they can drive the rotation. The disk rotates.

Preferably, a first bearing is fixedly installed on the side wall in the housing, and the driving shaft penetrates the inner ring of the first bearing and is fixedly connected to the inner ring of the first bearing. The first bearing can provide rotation for the driving shaft. support.

Preferably, arc-shaped slide blocks are fixedly installed on the top and bottom of the rotating disk, an annular slide rail is fixedly embedded in an annular shape on the inner wall of the housing, and the arc-shaped slide block extends into the annular slide rail and interacts with the annular slide rail. Rail sliding connection, using arc slide blocks and annular slide rails to improve the stability of the rotating disk when it rotates.

Preferably, a second bearing is fixedly installed on one inner wall of the housing, and the output shaft penetrates the inner ring of the second bearing and is fixedly connected to the inner ring of the second bearing. The second bearing can provide rotation for the output shaft. support.

Preferably, the limiting assembly includes two symmetrically arranged first limiting sleeves fixedly mounted on the bottom of the arc-shaped clamping plate, and a second limiting sleeve is slidably connected to the bottom of the first limiting sleeve, One end of the second limiting sleeve away from the first limiting sleeve is fixedly connected to the top of the support block. A support spring is set on the outside of the second limiting sleeve. The top of the support spring and the third The bottom of a limiting sleeve is fixedly connected, and the bottom of the support spring is fixedly connected to the outside of the second limiting sleeve. When the arc-shaped clamping plate moves longitudinally, the first limiting sleeve can be moved in the second limiting sleeve. The sliding movement on the cylinder effectively improves the stability of the longitudinal movement of the arc-shaped pallet.

Preferably, two symmetrically arranged clamping blocks are fixedly installed on the sides of the two arc-shaped clamping plates that are close to each other. The top and bottom of the output shaft are provided with symmetrically arranged clamping slots, and the clamping blocks extend to the corresponding The shaft is clamped in the slot and with the slot, and the arc clamping plate and the output shaft can be firmly clamped by using the clamping block and the slot.

Preferably, the heat dissipation assembly includes a cooling box, and the cooling box is located above the housing. A drive motor is fixedly installed on one side of the cooling box, and a drive shaft is fixedly installed on the output shaft of the drive motor. The drive shaft One end of the cooling box extends into the cooling box and is fixedly installed with a fan blade. An evaporator is fixedly installed in the cooling box. A connected cooling pipe is fixedly connected to the bottom of the cooling box. The bottom of the cooling pipe extends to the shell. Inside, the cooling box is provided with a return pipe, one end of the return pipe extends into the shell, an air pump is provided in the return pipe, a cooling pipe is arranged around the outside of the evaporator, and the top of the cooling box is fixed A refrigeration box is connected, both ends of the cooling pipe extend into the refrigeration box, a liquid pump is provided on the cooling pipe, and the liquid pump is fixedly installed on the top of the cooling box, and a partition is provided on the refrigeration box. There is cooling liquid in the refrigeration box, and a stirring assembly for mixing the cooling liquid in the refrigeration box is provided on the partition board. Two symmetrically arranged refrigeration boxes are fixedly installed on the top of the partition board. The exhaust port of the refrigeration box extends to the bottom of the partition, and the hot air is discharged into the cooling box through the cooling pipe. The hot air can be blown laterally by starting the drive motor. The blown hot air can pass through the evaporator and cooling pipe. The hot air is cooled, and the cooled air can be transported inside through the air pump, so that the inside can be cooled down and is easy to operate.

Preferably, the stirring assembly includes a rotating motor fixedly installed on the top of the partition, a first stirring shaft is fixedly installed at the bottom of the output shaft of the rotating motor, and the bottom of the first stirring shaft rotates with the bottom inner wall of the refrigeration box. connection, the bottom of the partition is rotatably connected to two symmetrically arranged second stirring shafts, and the bottom of the second stirring shaft is rotatably connected to the bottom inner wall of the refrigeration box, and the outer side of the first stirring shaft is sleeved with a first gear, a second gear is set on the outside of the second mixing shaft, and the first gear meshes with the two second gears. When starting the rotating motor, the first gear and the second gear can be used to drive the third gear. The first stirring shaft and the second stirring shaft rotate, and then the first stirring shaft and the second stirring shaft can be used to mix the cooling liquid in the refrigeration box and the cold gas generated by the refrigeration box, so that the cooling liquid is always in a low temperature state.

In the present invention, when the drive shaft on the reducer rotates, the drive shaft drives the sun gear to rotate, so that the rotating sun gear can drive the four planetary gears to rotate at the same time, and the power of the four planetary gears to rotate is It can be output through the output shaft. Due to the four planetary gears, the reducer body can achieve high torque, high precision and low noise transmission. At the same time, the reducer body can achieve the effect of optimizing the torque and inertial moment output. Improved the performance of the reducer body.

In the present invention, when the output shaft of the reducer body breaks and needs to be replaced, the externally threaded rods on the two support blocks are rotated respectively, and the externally threaded rods and the internally threaded sleeves are threadedly connected, so the arc-shaped clamp can be driven The plate moves, and when the two arc-shaped clamping plates are moved to the side away from each other, the brake on the output shaft can be released. At this time, the output shaft is pulled, and the second brake gear on the output shaft is When separated from the first brake gear on the rotating disk, the output shaft can be removed and replaced, which is convenient and quick to operate and improves the maintenance efficiency of the output shaft.

In the present invention, the hot air is discharged into the cooling box through the cooling tube, and the hot air can be blown laterally by starting the driving motor. The blown hot air can cool the hot air when passing through the evaporator and the cooling tube, and the cooled air can pass through The air pump is transported to the inside, so that the inside can be cooled down, and the operation is convenient. When starting the rotating motor, the first and second stirring shafts can be driven to rotate by the transmission of the first gear and the second gear, and then the first stirring shaft can be driven to rotate. The stirring shaft and the second stirring shaft can mix the coolant in the refrigeration box with the cold gas generated by the refrigeration box, so that the coolant is always in a low temperature state.

The invention is easy to operate. By providing four planetary gears, the performance of the reducer body can be improved as a whole. At the same time, a structure is provided in the casing to facilitate the disassembly of the output shaft, which effectively facilitates manual replacement or maintenance of the output shaft.

Description of the drawings

Figure 1 is a schematic front cross-sectional structural view of a planetary reducer proposed by the present invention;

Figure 2 is a schematic side structural view of the sun gear, planet gear and ring gear in Figure 1 of a planetary reducer proposed by the present invention;

Figure 3 is a schematic side structural view of the first brake ring ring and the second brake ring ring in Figure 1 of the planetary reducer proposed by the present invention;

Figure 4 is an enlarged structural schematic diagram of part A in Figure 1 of a planetary reducer proposed by the present invention;

Figure 5 is a schematic side cross-sectional structural diagram of a planetary reducer proposed by the present invention in which the arc plate in Figure 1 is connected to the output shaft;

Figure 6 is a schematic structural diagram of the cooling box in Figure 1 of a planetary reducer proposed by the present invention;

Figure 7 is a schematic structural diagram of the refrigeration box in Figure 6 of a planetary reducer proposed by the present invention.

In the picture: 1. Housing; 2. First bearing; 3. Drive shaft; 4. Sun gear; 5. Planetary gear; 6. Ring gear; 7. Rotating plate; 8. Fixing bolt; 9. Fixing nut; 10. First braking gear; 11. Output shaft; 12. Second braking gear; 13. Second bearing; 14. Support block; 15. Internally threaded sleeve; 16. Externally threaded rod; 17. Arc clamping plate; 18. The first limit sleeve; 19. The second limit sleeve; 20. Support spring, 21 cooling box, 22 drive motor, 23 drive shaft, 24 fan blades, 25 evaporator, 26 cooling pipe, 27 return pipe , 28 air pump, 29 cooling pipe, 30 liquid pump, 31 refrigeration box, 32 partition, 33 rotating motor, 34 refrigeration box, 35 first stirring shaft, 36 first gear, 37 second stirring shaft, 38 second gear.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments.

Embodiment 1

Referring to Figures 1-7, a planetary reducer includes a casing 1. One side of the casing 1 is rotatably connected to a drive shaft 3. One end of the drive shaft 3 extends into the casing 1 and is fixedly mounted with a sun gear 4. The sun gear 4 There are four planetary gears 5 arranged equidistantly in the outer annular mesh, and the outer sides of the four planetary gears 5 mesh with the same ring gear 6. The top and bottom of the ring gear 6 are fixed to the top inner wall and the bottom inner wall of the housing 1 respectively. connection, the same rotating disk 7 is fixedly installed on one side of the four planetary gears 5. The rotating disk 7 is annularly slidingly connected to the inner wall of the housing 1. The first brake gear 10 is fixedly installed at the center position of one side of the rotating disk 7. A second brake gear 12 meshes with a brake gear 10. One side of the second brake gear 12 is fixedly connected to an output shaft 11. One end of the output shaft 11 extends to the outside of the housing 1 and rotates with the outside of the housing 1. Connection, one side of the rotating disk 7 is fixedly installed with two symmetrically arranged support blocks 14, and the output shaft 11 is located between the two support blocks 14. The output shaft 11 is provided with an internally threaded sleeve 15, and the internally threaded sleeve 15 The inner ring is threadedly connected with an externally threaded rod 16, and the externally threaded rod 16 penetrates the support block 14. The ends of the two externally threaded rods 16 that are close to each other are rotationally connected with an arc-shaped clamping plate 17, and the two arc-shaped clamping plates 17 are far away from each other. Limiting components are fixedly installed on one side of the support block 14, and the limiting components are fixedly connected to one side of the support block 14. The sides of the two arc-shaped clamping plates 17 that are close to each other are engaged with the outside of the output shaft 11, and the housing 1 is fixed Connected heat dissipation components.

Embodiment 2

This embodiment is improved on the basis of Embodiment 1: the rotating disk 7 is threadedly connected with four annular and equidistantly arranged fixing bolts 8 , and one end of the four fixing bolts 8 respectively penetrates the four planetary gears 5 and connects with the four planetary gears 5 . The planetary gears 5 are threadedly connected, and the fixing bolt 8 is threadedly connected with a fixing nut 9. One side of the fixing nut 9 fits the outside of the planetary gear 5. The four planetary gears 5 can be evenly connected by using the fixing bolt 8 and the fixing bolt 8. It is fixedly connected to the rotating disk 7, so that when the planetary gear 5 rotates, it can drive the rotating disk 7 to rotate. The first bearing 2 is fixedly installed on the side wall of the housing 1, and the driving shaft 3 penetrates the inner ring of the first bearing 2 and Fixedly connected to the inner ring of the first bearing 2, the first bearing 2 can be used to provide rotational support for the drive shaft 3. The top and bottom of the rotating plate 7 are fixedly equipped with arc-shaped sliders, and the inner wall of the housing 1 is fixedly embedded in an annular shape. There is an annular slide rail, and the arc-shaped slide block extends into the annular slide rail and is slidingly connected with the annular slide rail. The use of the arc-shaped slide block and the annular slide rail can improve the stability of the rotating disk 7 when it rotates. One side of the housing 1 A second bearing 13 is fixedly installed on the inner wall. The output shaft 11 penetrates the inner ring of the second bearing 13 and is fixedly connected to the inner ring of the second bearing 13. The second bearing 13 can be used to provide rotational support for the output shaft 11. The limiting component It includes two symmetrically arranged first limiting sleeves 18 fixedly installed on the bottom of the arc-shaped clamping plate 17. The bottom of the first limiting sleeve 18 is slidably connected to a second limiting sleeve 19. The second limiting sleeve One end of 19 away from the first limiting sleeve 18 is fixedly connected to the top of the support block 14. A support spring 20 is set on the outside of the second limiting sleeve 19. The top of the support spring 20 is connected to the first limiting sleeve 18. The bottom of the support spring 20 is fixedly connected to the outside of the second limiting sleeve 19. When the arc-shaped clamping plate 17 moves longitudinally, the first limiting sleeve 18 can be positioned on the second limiting sleeve 19. By sliding, the stability of the longitudinal movement of the arc-shaped clamping plate 17 is effectively improved. Two symmetrically arranged clamping blocks are fixedly installed on the sides of the two arc-shaped clamping plates 17 that are close to each other. The top and bottom of the output shaft 11 are both There are symmetrically arranged card slots, and the card blocks extend into the corresponding card slots and engage the shaft with the card slots. The arc clamp plate 17 and the output shaft 11 can be firmly clamped by using the card blocks and card slots.

Embodiment 3

This embodiment is improved on the basis of Embodiment 1: the heat dissipation component includes a cooling box 21, and the cooling box 21 is located above the housing 1. A driving motor 22 is fixedly installed on one side of the cooling box 21, and the output shaft of the driving motor 22 is A drive shaft 23 is fixedly installed. One end of the drive shaft 23 extends into the cooling box 21 and is fixedly installed with a fan blade 24. An evaporator 25 is fixedly installed in the cooling box 21. A connected cooling pipe is fixedly connected to the bottom of the cooling box 21. 26. The bottom of the cooling pipe 26 extends to the inside of the housing 1. A return pipe 27 is provided in the cooling box 21. One end of the return pipe 27 extends into the housing 1. An air pump 28 is provided in the return pipe 27. The outside of the evaporator 25 is surrounded by A cooling pipe 29 is provided, and a refrigeration box 31 is fixedly connected to the top of the cooling box 21. Both ends of the cooling pipe 29 extend into the refrigeration box 31. A liquid pump 30 is provided on the cooling pipe 29, and the liquid pump 30 is fixedly installed on the cooling box. On the top of the box 21, the refrigeration box 31 is provided with a partition 32. The refrigeration box 31 is provided with cooling liquid. The partition 32 is provided with a stirring assembly for stirring the cooling liquid in the refrigeration box 31. The top of the partition 32 Two symmetrically arranged refrigeration boxes 34 are fixedly installed. The exhaust port of the refrigeration box 34 extends to the bottom of the partition 32. The hot air is discharged into the cooling box 21 through the cooling pipe 26, and the hot air can be discharged laterally by starting the drive motor 22. Blowing, the blown hot air can cool down the hot air when passing through the evaporator 25 and the cooling pipe 29. The cooled air can be transported into the 1 through the air pump 28, so that the inside of the 1 can be cooled down. It is easy to operate. The stirring assembly includes a fixed The rotating motor 33 is installed on the top of the partition 32. The first stirring shaft 35 is fixedly installed at the bottom of the output shaft of the rotating motor 33. The bottom of the first stirring shaft 35 is rotationally connected to the bottom inner wall of the refrigeration box 31. The bottom of the partition 32 Two symmetrically arranged second stirring shafts 37 are rotatably connected, and the bottom of the second stirring shaft 37 is rotatably connected to the bottom inner wall of the refrigeration box 31. A first gear 36 is set on the outside of the first stirring shaft 35, and the second stirring shaft 37 is rotatably connected. A second gear 38 is set on the outside of the shaft 37, and the first gear 36 meshes with the two second gears 38. When the rotating motor 33 is started, the first gear 36 and the second gear 38 can be used to drive the second gear 38. The first stirring shaft 35 and the second stirring shaft 37 rotate, and then the first stirring shaft 35 and the second stirring shaft 37 can be used to mix the cooling liquid in the refrigeration box 31 with the cold gas generated by the refrigeration box 34, so that the cooling liquid is always in the Low temperature state.

In the present invention, when the drive shaft 3 on the reducer rotates, the drive shaft 3 will drive the sun gear 4 to rotate, so that the rotating sun gear 4 can drive four planet gears 5 to rotate at the same time, and the four planets The power of the rotation of the gear 5 can be output through the output shaft 11. Due to the four planetary gears 5, the transmission of the reducer body with high torque, high precision and low noise can be achieved, and the reducer body can be optimized at the same time. The effect of torque and inertia moment output improves the performance of the reducer body.

In the present invention, when the output shaft 11 of the reducer body breaks and needs to be replaced, the externally threaded rods 16 on the two support blocks 14 are rotated respectively, and the externally threaded rod 16 and the internally threaded sleeve 15 are threadedly connected, so The arc-shaped clamping plates 17 can be driven to move, and when the two arc-shaped clamping plates 17 are moved to the side away from each other, the braking of the output shaft 11 can be released. At this time, the output shaft 11 is pulled, and the output shaft 11 is pulled. When the second brake gear 12 on the output shaft 11 and the first brake gear 10 on the rotating disk 7 are separated, the output shaft 11 can be removed and replaced. The operation is convenient and quick, and the maintenance efficiency of the output shaft 11 is improved. ;

The hot air is discharged into the cooling box 21 through the cooling pipe 26, and the hot air can be blown laterally by starting the drive motor 22. The blown hot air can cool the hot air when passing through the evaporator 25 and the cooling pipe 29, and the cooled air can It is transported to the interior of the chamber through the air pump 28, so that the interior of the chamber can be cooled down and is easy to operate. When starting the rotating motor 33, the first gear 36 and the second gear 38 can be used to drive the first stirring shaft 35 and the second stirring shaft. The shaft 37 rotates, and the first stirring shaft 35 and the second stirring shaft 37 can be used to mix the cooling liquid in the refrigeration box 31 with the cold air generated by the refrigeration box 34, so that the cooling liquid is always in a low temperature state.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a planetary reducer, including shell (1), its characterized in that, one side of shell (1) rotates and is connected with drive shaft (3), one end of drive shaft (3) extends to in shell (1) and fixed mounting has sun gear (4), the outside annular meshing of sun gear (4) has four planetary gear (5) that the equidistance was arranged, and the outside of four planetary gear (5) meshes mutually has same ring gear (6), the top and the bottom of ring gear (6) respectively with shell (1) top inner wall and bottom inner wall fixed connection, one side of four planetary gear (5) is fixed mounting has same rotary disk (7), the annular sliding connection of rotary disk (7) and the inner wall of shell (1), one side central point of rotary disk (7) puts fixed mounting and has first brake gear (10), the meshing has second brake gear (12) in first brake gear (10), one side fixed connection of second brake gear (12) has output shaft (11), one end of output shaft (11) extends to the outside of shell (1) and shell (1) top inner wall and bottom inner wall fixed connection, one side of two support blocks (14) are located between two fixed mounting of rotary disk (1) and two support blocks (14), be provided with female screw sleeve (15) on output shaft (11), the inner circle threaded connection of female screw sleeve (15) has external screw rod (16), and external screw rod (16) run through supporting shoe (14), the one end that two external screw rods (16) are close to each other all rotates and is connected with arc cardboard (17), the one side that two arc cardboard (17) kept away from each other is all fixed and is provided with spacing subassembly, and one side fixed connection of spacing subassembly and supporting shoe (14), one side that two arc cardboard (17) are close to each other and the outside looks block of output shaft (11), fixedly connected with is linked together's radiator unit on shell (1).

2. The planetary reducer according to claim 1, wherein four fixing bolts (8) which are annularly and equidistantly arranged are connected to the rotating disc (7) in a threaded mode, one ends of the four fixing bolts (8) penetrate through the four planetary gears (5) respectively and are in threaded connection with the four planetary gears (5), fixing nuts (9) are connected to the fixing bolts (8) in a threaded mode, and one sides of the fixing nuts (9) are attached to the outer sides of the planetary gears (5).

3. The planetary reducer according to claim 1, wherein the first bearing (2) is fixedly mounted on the side wall in the housing (1), and the driving shaft (3) penetrates through the inner ring of the first bearing (2) and is fixedly connected with the inner ring of the first bearing (2).

4. The planetary reducer according to claim 1, wherein arc-shaped sliding blocks are fixedly arranged at the top and the bottom of the rotating disc (7), annular sliding rails are fixedly embedded on the inner wall of the shell (1), and the arc-shaped sliding blocks extend into the annular sliding rails and are in sliding connection with the annular sliding rails.

5. A planetary reducer according to claim 1, wherein a second bearing (13) is fixedly mounted on an inner wall of one side of the housing (1), and the output shaft (11) penetrates an inner ring of the second bearing (13) and is fixedly connected with the inner ring of the second bearing (13).

6. The planetary reducer according to claim 1, wherein the limiting assembly comprises two first limiting sleeves (18) fixedly installed at the bottoms of the arc-shaped clamping plates (17) and symmetrically arranged, the bottoms of the first limiting sleeves (18) are slidably connected with second limiting sleeves (19), one ends, far away from the first limiting sleeves (18), of the second limiting sleeves (19) are fixedly connected with the tops of the supporting blocks (14), supporting springs (20) are sleeved on the outer sides of the second limiting sleeves (19), the tops of the supporting springs (20) are fixedly connected with the bottoms of the first limiting sleeves (18), and the bottoms of the supporting springs (20) are fixedly connected with the outer sides of the second limiting sleeves (19).

7. The planetary reducer according to claim 1, wherein two clamping blocks which are symmetrically arranged are fixedly arranged on one sides, close to each other, of the two arc clamping plates (17), clamping grooves which are symmetrically arranged are formed in the top and the bottom of the output shaft (11), and the clamping blocks extend into the corresponding clamping grooves and are clamped with the clamping grooves.

8. The planetary reducer according to claim 1, wherein the heat dissipation assembly comprises a cooling box (21), the cooling box (21) is located above the casing (1), a driving motor (22) is fixedly installed on one side of the cooling box (21), a driving shaft (23) is fixedly installed on an output shaft of the driving motor (22), one end of the driving shaft (23) extends into the cooling box (21) and is fixedly provided with fan blades (24), an evaporator (25) is fixedly installed in the cooling box (21), a cooling pipe (26) communicated with the bottom of the cooling box (21) is fixedly connected, the bottom of the cooling pipe (26) extends into the casing (1), a backflow pipe (27) is arranged in the cooling box (21), one end of the backflow pipe (27) extends into the casing (1), an air pump (28) is arranged in the backflow pipe (27), one end of the evaporator (25) is fixedly connected with a cooling box (31) at the top, cooling pipes (29) are fixedly connected with one end of the cooling box (21), the cooling pipes (31) are fixedly connected with one another end of the other end of the cooling box (29) and are fixedly connected with one end of the other end of the cooling pipe (30) on the cooling box (30), be provided with baffle (32) on refrigerating box (31), be provided with the coolant liquid in refrigerating box (31), be provided with on baffle (32) and be used for carrying out the stirring subassembly that mixes to the coolant liquid in refrigerating box (31), two refrigerating boxes (34) of symmetry setting are fixed mounting at the top of baffle (32), the gas vent of refrigerating box (34) extends to the below of baffle (32).

9. The planetary reducer according to claim 8, wherein the stirring assembly comprises a rotating motor (33) fixedly mounted at the top of a partition plate (32), a first stirring shaft (35) is fixedly mounted at the bottom of an output shaft of the rotating motor (33), the bottom of the first stirring shaft (35) is rotationally connected with the bottom inner wall of a refrigerating box (31), two second stirring shafts (37) symmetrically arranged are rotationally connected at the bottom of the partition plate (32), the bottom of the second stirring shaft (37) is rotationally connected with the bottom inner wall of the refrigerating box (31), a first gear (36) is sleeved outside the first stirring shaft (35), a second gear (38) is sleeved outside the second stirring shaft (37), and the first gear (36) is meshed with the two second gears (38).