A planetary reduction motor

Abstract

A planetary reduction motor comprises a shell, wherein a heat dissipation mechanism, a reducer, a heat dissipation mechanism and a motor body are sequentially arranged in the axial distribution in the shell, and an air inlet and an air outlet are respectively arranged on both sides of the shell along the axial direction. The reducer and the two groups of the heat dissipation mechanisms are driven by the motor body, and the reducer and the motor body are provided with a fixing frame for fixing to the inner wall of the shell. A heat dissipation duct is formed between the reducer, the motor body and the inner wall of the shell. Heat sinks are distributed on the sides of the reducer and the motor body. The heat dissipation mechanism comprises a drive shaft, a heat dissipation fan and a forward and reverse switching component. The forward and reverse switching component comprises a forward transmission structure, a reverse transmission structure and a switching structure. The above design greatly improves the heat dissipation efficiency by designing the heat sink in the heat dissipation duct, and regardless of the forward and reverse rotation of the motor, it is a stable single wind direction, which can effectively avoid the problem of reduced heat dissipation efficiency and heat accumulation due to wind direction change.

Description

Technical Field

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

[0002] Planetary reduction motors are widely used in industrial automation, robotics, precision machining and other fields, and their performance and reliability are crucial to the operation of the entire system. However, planetary reduction motors will generate a lot of heat when running at high load for a long time. If the heat dissipation effect is not good, it will cause the motor to overheat, affecting its performance and life. Therefore, efficient heat dissipation design is one of the key factors to improve the performance of planetary reduction motors. Existing planetary reduction motor heat dissipation technologies mainly include natural heat dissipation, air cooling and liquid cooling. Among them, air cooling is widely used because of its simple structure and low cost. The traditional air cooling method usually sets a cooling fan on the casing to reduce the motor temperature by forced air cooling. However, this design has the following disadvantages:

[0003] 1. Low heat dissipation efficiency: Traditional air cooling usually only sets one or several cooling fans on the outside of the casing, which cannot effectively cover the high temperature areas of the motor and the reduction part. The air volume of the cooling fan is limited, and it is difficult to quickly remove the heat generated inside, resulting in low heat dissipation efficiency.

[0004] 2. Unstable wind direction: In some applications, planetary reduction motors need to rotate forward and reverse frequently. In traditional air cooling, the cooling fan is usually driven coaxially with the motor body. When the motor reverses, the cooling fan will also reverse, causing the wind direction to change. The change in wind direction will not only reduce the heat dissipation efficiency, but may also cause local heat accumulation, further affecting the performance and life of the motor.

[0005] 3. Complex structure: In order to achieve a stable wind direction, some designs use complex mechanical structures, such as a dual-fan system or additional wind direction control devices. These complex structures not only increase manufacturing costs, but may also increase the failure rate and affect the reliability and maintainability of the motor.

[0006] In summary, the existing planetary reduction motor cooling technology has many shortcomings in terms of cooling efficiency, wind direction stability, heat sink layout and structural complexity, and an efficient and reliable cooling solution is urgently needed. Summary of the invention

[0007] In order to solve the above technical problems, the present invention is solved by the following technical solutions.

[0008] A planetary reduction motor comprises a shell, wherein a heat dissipation mechanism, a reducer, a heat dissipation mechanism and a motor body are sequentially arranged in the shell along the axial direction, and an air inlet and an air outlet are respectively arranged on both sides of the shell along the axial direction. The reducer and two groups of the heat dissipation mechanisms are driven by the motor body. A heat dissipation air duct is formed between the reducer, the motor body and the inner wall of the shell. Heat dissipation fins are distributed on the sides of the reducer and the motor body. The heat dissipation mechanism comprises a driving shaft, a heat dissipation fan and a forward and reverse switching component. The forward and reverse switching component comprises a forward transmission structure, a reverse transmission structure and a switching structure, wherein the forward transmission structure and the reverse transmission structure are assembled and fixed with the heat dissipation fan, and the switching structure is assembled on the driving shaft. When the motor body rotates forward, the switching structure is connected to the forward transmission structure, and the heat dissipation fan rotates forward; when the motor body rotates reversely, the switching structure is connected to the reverse transmission structure, and the heat dissipation fan rotates forward. The above design greatly improves the heat dissipation efficiency by designing the heat dissipation fins in the heat dissipation air duct, and the wind direction is stable and single regardless of whether the motor rotates forward or reverse, which can effectively avoid the problem of reduced heat dissipation efficiency and heat accumulation caused by wind direction change.

[0009] As a preferred technical solution of the present application, the heat dissipation fan includes an assembly portion located in the middle and a fan portion with fan blades arranged on the side of the assembly portion. The outer diameter of the fan portion is larger than the outer diameter of the reducer and the motor body. The ratio of the outer diameter of the fan portion to the assembly portion is less than 1.5. This design ensures that the airflow generated by the fan can enter the heat dissipation duct more directly, reducing the airflow loss caused by the obstruction of the reducer or the motor end face. This structure optimizes the airflow path and improves the heat dissipation efficiency, thereby effectively improving the thermal management performance of the entire system.

[0010] As a preferred technical solution of the present application, the switching structure includes an annular switching seat, and the switching seat is assembled between the forward transmission structure and the reverse transmission structure through a first bearing. A shift block is assembled in the switching seat, and the shift block includes a switching end, a middle section and a control end. A switching cavity is arranged in the switching seat, and the switching end is located in the switching cavity. The middle section is hinged with the switching seat, and a groove is arranged on the drive shaft, and the control end is located in the groove. A forward rotation position and a reverse rotation position are respectively arranged on both sides of the switching cavity. A forward connecting piece is assembled in the forward rotation position, and a reverse connecting piece is assembled in the reverse position. When the motor body rotates forward, the switching end of the shift block is connected to the forward connecting piece, and the forward connecting piece is connected to the forward transmission structure, and the cooling fan rotates forward; when the motor body is reversed, the switching end of the shift block is connected to the reverse connecting piece, and the reverse connecting piece is connected to the reverse transmission structure, and the cooling fan rotates forward. This design can realize that the cooling fan always rotates in one direction when the motor rotates forward and reverse, ensuring a stable heat dissipation effect.

[0011] As a preferred technical solution of the present application, the forward connector and the reverse connector both include a push rod and a spring. Through holes are provided on the end faces of both sides of the switching seat along the axial direction, and the top of the push rod is located in the through holes. A base is provided at the bottom of the push rod, and a first inclined surface is provided on the side of the base facing the shift block, and a second inclined surface abutting against the first inclined surface is correspondingly provided on the shift block. One end of the spring abuts against the base, and the other end abuts against the inner wall of the switching cavity. When the motor body rotates forward, the switching end moves to the forward rotation position, and the push rod of the forward connector is pushed out to connect with the forward transmission structure; when the motor body reverses, the switching end moves to the reverse position, and the push rod of the reverse connector is pushed out to connect with the reverse transmission structure. The cooperation of the spring and the push rod can ensure the reliability and stability of the forward connector and the reverse connector when switching between the extended and retracted states, and is conducive to ensuring the rapid response of the switching between the forward and reverse states.

[0012] As a preferred technical solution of the present application, a limiting protrusion is provided on the side of the base, and a limiting groove cooperating with the limiting protrusion is provided on the side wall of the positive rotation position or the reverse rotation position, which is beneficial to prevent the push rod from shifting during the switching process and ensure the reliability of the connection.

[0013] As a preferred technical solution of the present application, the forward transmission structure includes a transmission plate, and the transmission plate is fixed on the cooling fan. The transmission plate is provided with a first connection hole that cooperates with the top rod of the forward connecting member. The connection between the forward transmission structure and the forward connecting member is achieved through the cooperation between the top rod and the first connection hole, which has a simple structure and reliable connection.

[0014] As a preferred technical solution of the present application, the reverse transmission structure is a planetary transmission structure, including a sun gear, a planetary gear and a ring gear. The planetary transmission structure realizes the transmission effect of forward rotation input and reverse rotation output. The sun gear and the transmission plate are assembled on the drive shaft through a second bearing, the planetary gear is assembled on the planetary carrier, the planetary carrier is fixedly arranged, and the ring gear is assembled and fixed to the cooling fan. The sun gear is provided with a second connecting hole that cooperates with the top rod of the reverse connecting member. The connection between the reverse transmission structure and the reverse connecting member is realized by the cooperation between the top rod and the second connecting hole, and the structure is simple and the connection is reliable.

[0015] As a preferred technical solution of the present application, an elastic pad is installed in the groove, and the control end is wrapped in the elastic pad. The elastic pad is used to reduce vibration and noise, reduce wear of the drive shaft and the shift block, and extend the service life.

[0016] Compared with the prior art, the present application has the following beneficial effects: the heat dissipation efficiency is greatly improved by designing the heat sink in the heat dissipation duct, and regardless of the forward or reverse rotation of the motor, a stable single wind direction is maintained, which can effectively avoid the problem of reduced heat dissipation efficiency and heat accumulation due to wind direction changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a planetary reduction motor.

[0018] Figure 2 The cross section of the planetary reduction motor Figure 1 .

[0019] Figure 3 The cross section of the planetary reduction motor Figure 2 .

[0020] Figure 4 It is the assembly diagram of the heat dissipation mechanism, reducer and motor body.

[0021] Figure 5 This is an exploded diagram of the heat dissipation structure.

[0022] Figure 6 It is a structural cross-sectional view of the heat dissipation mechanism.

[0023] Figure 7 for Figure 6 Cross-sectional view at AA in the middle.

[0024] Figure 8 for Figure 6 Cross-sectional view at the middle BB.

[0025] Fig. 9 It is a schematic diagram of the structure of the cooling fan.

[0026] Fig.10 It is an assembly diagram of the shift block and the drive shaft, the forward connecting piece, and the reverse connecting piece.

[0027] Fig.11 It is a three-dimensional schematic diagram of the dial block.

[0028] Fig.12 It is a three-dimensional schematic diagram of a forward connector or a reverse connector.

[0029] The following is a description of the markings in the accompanying drawings of the specification:

[0030] 100, housing; 110, air inlet; 120, air outlet; 130, heat dissipation duct; 140, reducer; 150, motor body; 160, heat sink; 170, fixing frame;

[0031] 200, heat dissipation mechanism; 210, heat dissipation fan; 211, assembly part; 212, fan part; 220, drive shaft; 221, groove; 222, elastic pad;

[0032] 300, forward transmission structure; 310, transmission plate; 311, first connecting hole; 320, second bearing;

[0033] 400, reverse transmission structure; 410, sun gear; 411, second connecting hole; 420, planetary gear; 430, ring gear; 440, planet carrier;

[0034] 500, switching structure; 510, switching seat; 511, switching cavity; 512, positive rotation; 513, reverse rotation; 514, limiting slide groove; 520, first bearing; 530, shift block; 531, switching end; 532, middle section; 533, control end; 534, second inclined surface; 540, forward connecting member; 550, reverse connecting member; 551, push rod; 552, spring; 553, base; 554, first inclined surface; 555, limiting protrusion. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this practicality according to the specific circumstances.

[0038] Reference Figures 1 to 12A planetary reduction motor comprises a housing 100, wherein a heat dissipation mechanism 200, a reducer 140, a heat dissipation mechanism 200 and a motor body 150 are sequentially arranged in the housing 100 along the axial direction, and an air inlet 110 and an air outlet 120 are respectively arranged on both sides of the housing 100 along the axial direction. The reducer 140 and the two groups of the heat dissipation mechanism 200 are driven by the motor body 150, and the reducer 140 and the motor body 150 are both provided with a fixing frame 170 for fixing to the inner wall of the housing 100. A heat dissipation air duct 130 is formed between the reducer 140, the motor body 150 and the inner wall of the housing 100. Heat sinks 160 are distributed on the sides of the reducer 140 and the motor body 150. The heat dissipation mechanism 200 comprises a drive shaft 220, a heat dissipation fan 210 and a forward and reverse switching component. The forward-reverse switching assembly includes a forward transmission structure 300, a reverse transmission structure 400 and a switching structure 500. The forward transmission structure 300, the reverse transmission structure 400 are fixedly assembled with the cooling fan 210, and the switching structure 500 is assembled on the driving shaft 220. When the motor body 150 rotates forward, the switching structure 500 is connected to the forward transmission structure 300, and the cooling fan 210 rotates forward; when the motor body 150 rotates reversely, the switching structure 500 is connected to the reverse transmission structure 400, and the cooling fan 210 rotates forward. The above design greatly improves the heat dissipation efficiency by designing the heat sink 160 in the heat dissipation duct 130, and no matter whether the motor rotates forward or reverse, it is a stable single wind direction, which can effectively avoid the problem of reduced heat dissipation efficiency and heat accumulation due to wind direction change.

[0039] The heat dissipation fan 210 includes an assembly portion 211 in the middle and a fan portion 212 with fan blades arranged on the side of the assembly portion 211. The outer diameter of the fan portion 212 is larger than the outer diameter of the reducer 140 and the motor body. The ratio of the outer diameter of the fan portion 212 to the assembly portion 211 is less than 1.5. This design ensures that the airflow generated by the fan can enter the heat dissipation duct 130 more directly, reducing the airflow loss caused by obstruction of the reducer 140 or the motor end face. This structure optimizes the airflow path and improves the heat dissipation efficiency, thereby effectively improving the thermal management performance of the entire system.

[0040] In the present application, the specific structure of the heat dissipation mechanism 200 is as follows: the switching structure 500 includes an annular switching seat 510, and the switching seat 510 is assembled between the forward transmission structure 300 and the reverse transmission structure 400 through a first bearing 520. A shift block 530 is assembled in the switching seat 510, and the shift block 530 includes a switching end 531, a middle section 532 and a control end 533. A switching cavity 511 is arranged in the switching seat 510, and the switching end 531 is located in the switching cavity 511. The middle section 532 is hinged to the switching seat 510. A groove 221 is arranged on the driving shaft 220, and the control end 533 is located in the groove 221. A forward rotation position 512 and a reverse rotation position 513 are respectively arranged on both sides of the switching cavity 511. A forward connecting member 540 is assembled in the forward rotation position 512, and a reverse connecting member 550 is assembled in the reverse rotation position 513. When the motor body 150 rotates forward, the switching end 531 of the shift block 530 is connected to the forward connecting member 540, the forward connecting member 540 is connected to the forward transmission structure 300, and the cooling fan 210 rotates forward; when the motor body 150 rotates reversely, the switching end 531 of the shift block 530 is connected to the reverse connecting member 550, the reverse connecting member 550 is connected to the reverse transmission structure 400, and the cooling fan 210 rotates forward. This design can realize that the cooling fan 210 always rotates in one direction when the motor rotates forward and reverse, ensuring a stable cooling effect.

[0041] In the present application, the forward connector 540 and the forward transmission structure 300, the reverse connector 550 and the reverse transmission structure 400 realize power connection and disconnection through the following structures: the forward connector 540 and the reverse connector 550 both include a push rod 551 and a spring 552. The switch seat 510 is provided with through holes on both side end faces along the axial direction, and the top of the push rod 551 is located in the through holes. A base 553 is provided at the bottom of the push rod 551, and a first inclined surface 554 is provided on the side of the base 553 facing the shift block 530, and a second inclined surface 534 abutting against the first inclined surface 554 is correspondingly provided on the shift block 530. One end of the spring 552 abuts against the base 553, and the other end abuts against the inner wall of the switching chamber 511. When the motor body 150 rotates forward, the switching end 531 moves to the forward rotation position 512, and the push rod 551 of the forward connecting member 540 is pushed out to connect with the forward transmission structure 300; when the motor body 150 rotates reversely, the switching end 531 moves to the reverse rotation position 513, and the push rod 551 of the reverse connecting member 550 is pushed out to connect with the reverse transmission structure 400. The cooperation between the spring 552 and the push rod 551 can ensure the reliability and stability of the forward connecting member 540 and the reverse connecting member 550 when switching between the extended and retracted states, and is conducive to ensuring the rapid response of the switching between the forward and reverse states.

[0042] The forward transmission structure 300 includes a transmission plate 310, which is fixed on the cooling fan 210. The transmission plate 310 is provided with a first connection hole 311 that cooperates with the top rod 551 of the forward connecting member 540. The connection between the forward transmission structure and the forward connecting member 540 is achieved through the cooperation between the top rod 551 and the first connection hole 311, which has a simple structure and reliable connection. The reverse transmission structure 400 is a planetary transmission structure, including a sun gear 410, a planetary gear 420 and a ring gear 430. The transmission effect of forward rotation input and reverse rotation output is achieved through the planetary transmission structure. The sun gear 410 and the transmission plate 310 are assembled on the drive shaft 220 through the second bearing 320, the planetary gear 420 is assembled on the planetary carrier 440, the planetary carrier 440 is fixedly arranged, and the ring gear 430 is assembled and fixed with the cooling fan 210. The sun gear 410 is provided with a second connection hole 411 that cooperates with the top rod 551 of the reverse connecting member 550. The reverse transmission structure 400 and the reverse connecting member 550 are connected by the cooperation between the push rod 551 and the second connecting hole 411 , which has a simple structure and reliable connection.

[0043] The working principle of the heat dissipation mechanism 200 described in the present application is as follows: when the motor body 150 is in the forward rotation state, the drive shaft 220 rotates forward, driving the shift block 530 to rotate, the switching end 531 of the shift block 530 moves to the forward rotation position 512, the push rod 551 of the forward connecting member 540 is pushed out and inserted into the first connecting hole 311 of the transmission plate 310 in the forward transmission structure 300, and the heat dissipation fan 210 is driven to rotate forward. When the motor body 150 switches to the reverse state, the drive shaft 220 reverses, driving the switching end 531 of the shift block 530 to move to the reverse position 513, the push rod 551 of the reverse connecting member 550 is pushed out and inserted into the second connecting hole 411 of the sun gear 410 of the reverse transmission structure 400, and the push rod 551 of the forward connecting member 540 retracts. The sun gear 410 is driven to rotate in the reverse direction, the rotation of the sun gear 410 drives the planetary gear 420 to rotate, and the rotation of the planetary gear 420 drives the ring gear 430 to rotate in the forward direction. Since the ring gear 430 is fixedly assembled with the cooling fan 210, the cooling fan 210 is driven to rotate in the forward direction.

[0044] Furthermore, a limiting protrusion 555 is provided on the side of the base 553, and a limiting sliding groove 514 cooperating with the limiting protrusion 555 is provided on the side wall of the positive rotation position 512 or the reverse rotation position 513, which is conducive to preventing the top rod 551 from deflecting during the switching process and ensuring the reliability of the connection. An elastic pad 222 is installed in the groove 221, and the control end 533 is wrapped in the elastic pad 222. The function of the elastic pad 222 is to reduce vibration and noise, reduce the wear of the drive shaft 220 and the shift block 530, and extend the service life.

[0045] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A planetary reduction motor, characterized in that: The invention comprises a housing (100), wherein a heat dissipation mechanism (200), a reducer (140), a heat dissipation mechanism (200) and a motor body (150) are sequentially arranged in the housing (100) along the axial direction, and an air inlet (110) and an air outlet (120) are respectively arranged on two sides of the housing (100) along the axial direction; the reducer (140) and two groups of the heat dissipation mechanisms (200) are driven by the motor body (150); a heat dissipation air duct (130) is formed between the reducer (140), the motor body (150) and the inner wall of the housing (100); and heat dissipation fins (160) are distributed on the sides of the reducer (140) and the motor body (150); The heat dissipation mechanism (200) comprises a drive shaft (220), a heat dissipation fan (210) and a forward-reverse switching assembly; the forward-reverse switching assembly comprises a forward transmission structure (300), a reverse transmission structure (400) and a switching structure (500); the forward transmission structure (300), the reverse transmission structure (400) and the heat dissipation fan (210) are assembled and fixed, and the switching structure (500) is assembled on the drive shaft (220); When the motor body (150) rotates forward, the switching structure (500) is connected to the forward transmission structure (300), and the cooling fan (210) rotates forward; When the motor body (150) rotates in reverse, the switching structure (500) is connected to the reverse transmission structure (400), and the cooling fan (210) rotates in the forward direction; The switching structure (500) comprises an annular switching seat (510), and the switching seat (510) is assembled between the forward transmission structure (300) and the reverse transmission structure (400) via a first bearing (520); a shift block (530) is assembled in the switching seat (510), and the shift block (530) comprises a switching end (531), an intermediate section (532), and a control end (533); a switching cavity (511) is arranged in the switching seat (510), and the switching end (5 31) is located in the switching cavity (511), the middle section (532) is hinged to the switching seat (510), the driving shaft (220) is provided with a groove (221), and the control end (533) is located in the groove (221); a positive rotation position (512) and a reverse rotation position (513) are respectively provided on both sides of the switching cavity (511), a positive connecting member (540) is installed in the positive rotation position (512), and a reverse connecting member (550) is installed in the reverse rotation position (513); When the motor body (150) rotates forward, the switching end (531) of the shifting block (530) is connected to the forward connecting member (540), the forward connecting member (540) is connected to the forward transmission structure (300), and the cooling fan (210) rotates forward; When the motor body (150) rotates in reverse, the switching end (531) of the shifting block (530) is connected to the reverse connecting member (550), the reverse connecting member (550) is connected to the reverse transmission structure (400), and the cooling fan (210) rotates in the forward direction.

2. A planetary reduction motor according to claim 1, characterized in that: The heat dissipation fan (210) comprises an assembly portion (211) located in the middle and a fan portion (212) with fan blades arranged around the side of the assembly portion (211); the outer diameter of the fan portion (212) is greater than the outer diameters of the reducer (140) and the motor body (150); and the ratio of the outer diameters of the fan portion (212) to the assembly portion (211) is less than 1.

5.

3. A planetary reduction motor according to claim 1, characterized in that: The forward connecting member (540) and the reverse connecting member (550) both comprise a push rod (551) and a spring (552); through holes are provided on both side end surfaces of the switching seat (510) along the axial direction, and the top of the push rod (551) is located in the through hole; a base (553) is provided at the bottom of the push rod (551); a first inclined surface (554) is provided on the side of the base (553) facing the shift block (530); and a second inclined surface (534) abutting against the first inclined surface (554) is correspondingly provided on the shift block (530); one end of the spring (552) abuts against the base (553), and the other end abuts against the inner wall of the switching chamber (511); When the motor body (150) rotates forward, the switching end (531) moves to the forward rotation position (512), and the push rod (551) of the forward connecting member (540) is pushed out to connect with the forward transmission structure (300); when the motor body (150) rotates reversely, the switching end (531) moves to the reverse rotation position (513), and the push rod (551) of the reverse connecting member (550) is pushed out to connect with the reverse transmission structure (400).

4. A planetary reduction motor according to claim 3, characterized in that: A limiting protrusion (555) is provided on the side of the base (553), and a limiting sliding groove (514) cooperating with the limiting protrusion (555) is provided on the side wall of the positive rotation position (512) or the reverse rotation position (513).

5. A planetary reduction motor according to claim 3, characterized in that: The forward transmission structure (300) comprises a transmission plate (310), wherein the transmission plate (310) is fixed on the cooling fan (210); the transmission plate (310) is provided with a first connection hole (311) that cooperates with a top rod (551) of a forward connecting member (540).

6. A planetary reduction motor according to claim 5, characterized in that: The reverse transmission structure (400) is a planetary transmission structure, comprising a sun gear (410), a planetary gear (420) and a ring gear (430); the sun gear (410) and the transmission plate (310) are assembled on the drive shaft (220) via a second bearing (320); the planetary gear (420) is assembled on a planetary carrier (440); the planetary carrier (440) is fixedly arranged; the ring gear (430) is assembled and fixed to the cooling fan (210); and the sun gear (410) is provided with a second connection hole (411) that cooperates with a top rod (551) of a reverse connection member (550).

7. A planetary reduction motor according to claim 1, characterized in that: An elastic pad (222) is installed in the groove (221), and the control end (533) is wrapped in the elastic pad (222).

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