Miniature external rotor internal integrated high-reduction-ratio power device

Abstract

The invention belongs to the technical field of mechanical engineering automation, and discloses a miniature external rotor internal integrated high-reduction-ratio power device which comprises a motor rotor, a rotor permanent magnet, a stator winding, a stator iron core, an internal fixing shell and an end cover. A plurality of sets of first-level planetary gears are arranged outside the first-level sun gear in a meshed mode, the first-level planetary gears are connected with a first-level planetary gear carrier, the first-level planetary gear carrier is connected with a second-level sun gear, a plurality of sets of second-level planetary gears are arranged outside the second-level sun gear in a meshed mode, and the second-level planetary gears are connected with a second-level planetary gear carrier. The second-stage planetary gear carrier is connected with a third-stage sun gear, a plurality of sets of third-stage planetary gears are arranged outside the third-stage sun gear in a meshed mode, and the third-stage planetary gears are connected with a third-stage planetary gear carrier. The problems that an existing motor acceleration and speed reducer device is generally of a structure that a motor and a speed reducer are connected in series, the speed reducer is installed on the outer side of the motor, and high-integration occasions are not facilitated are solved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical engineering automation, and in particular to a high reduction ratio power device integrated in a micro outer rotor. Background Art

[0002] Motor reducer devices are widely used, such as in industrial automation production lines, robotics, automotive transmission systems, household appliances, etc. By using a reducer, the speed and output torque of the motor can be effectively adjusted, allowing the machine to work under a wider range of conditions and improve efficiency and performance. This device can be divided into two main parts: the motor and the reducer.

[0003] A conventional motor-accelerator device is usually a structure in which a motor and a reducer are connected in series, and the reducer is installed on the outside of the motor. The conventional structure is a slender structure, which is not conducive to high integration occasions, especially robot joints and volume constraint occasions. Therefore, the present invention proposes a high reduction ratio power device integrated in a miniature outer rotor to solve such problems. Summary of the invention

[0004] The present invention aims to provide a high reduction ratio power device integrated in a miniature outer rotor to solve the problem that the existing motor acceleration and reduction device is usually a structure in which the motor and the reducer are connected in series, and the reducer is installed on the outside of the motor, which is not conducive to high integration.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The basic technical solution provided by the present invention is: a micro outer rotor integrated high reduction ratio power device, comprising a motor rotor, a rotor permanent magnet, a stator winding, a stator core, an internal fixed shell, an end cover and an end cover straight mouth, the internal fixed shell is fixedly connected to the end cover, the motor rotor is rotatably connected to the internal fixed shell, the motor rotor is provided with a rotor output shaft, the rotor output shaft is fixedly connected to a primary sun gear through a D-shaped shaft hole, the primary sun gear is externally meshed and surrounded by a plurality of groups of primary planetary gears, the primary planetary gears are rotatably connected to a primary planetary gear carrier, the output shaft of the primary planetary gear carrier is fixedly connected to a secondary sun gear through a D-shaped shaft hole, the secondary sun gear is externally meshed and surrounded by a plurality of groups of secondary planetary gears, the secondary planetary gears are rotatably connected to a secondary planetary gear carrier, the output shaft of the secondary planetary gear carrier is fixedly connected to a third-stage sun gear through a D-shaped shaft hole, the third-stage sun gear is externally meshed and surrounded by a plurality of groups of third-stage planetary gears, the third-stage planetary gears are rotatably connected to a third-stage planetary gear carrier, and the third-stage planetary gear carrier is provided with a planetary reducer output shaft.

[0007] The principle of the basic technical solution is: the permanent magnet of the rotating shaft drives the motor rotor to rotate, and the rotor output shaft drives the first-stage sun gear to rotate. The first-stage sun gear drives the first-stage planetary gear to rotate while making a circular motion around its axis, thereby driving the second-stage sun gear to rotate through the first-stage planetary gear carrier, thereby achieving the purpose of first-stage reduction; the second-stage sun gear drives the second-stage planetary gear to rotate while making a circular motion around the axis of the sun gear, thereby driving the third-stage sun gear to rotate through the second-stage planetary gear carrier, thereby achieving the purpose of second-stage reduction; the third-stage sun gear drives the third-stage planetary gear to rotate while making a circular motion around the axis of the third-stage sun gear, thereby driving the output shaft of the planetary reducer to rotate through the third-stage planetary gear carrier, thereby achieving the purpose of third-stage reduction.

[0008] The beneficial effects of the basic technical solution are: through the cooperation of the sun gear and the planetary gear, the reduction transmission ratio is large, the performance is stable, and it is easy to use. The main body of the device is composed of an outer rotor motor and a three-stage planetary reducer. The three-stage planetary reducer is arranged in the hollow part inside the motor nail, and the hollow part inside the motor stator is reasonably utilized, thereby reducing the combined length and combined volume of the motor and the reduction device, achieving the purpose of high integration.

[0009] Preferably, the motor rotor is provided with a bearing chamber, the bearing chamber is provided with a first bearing, and the motor rotor is rotatably connected to the internal fixed shell through the first bearing.

[0010] Through the above arrangement, through the arrangement of the bearing 1, the motor rotor can rotate more smoothly, while reducing the wear between the motor rotor and the internal fixed shell.

[0011] Preferably, bearing 2 is arranged between the first-stage planetary gear and the first-stage planetary gear carrier, between the second-stage planetary gear and the second-stage planetary gear carrier, and between the third-stage planetary gear and the third-stage planetary gear carrier.

[0012] Through the above arrangement, the arrangement of the second bearing reduces the rotational friction between the planetary gear carrier and the corresponding planetary gear, thereby improving its reliability.

[0013] Preferably, a bearing three is provided between the output shaft of the planetary reducer and the end cover.

[0014] Through the above arrangement, the arrangement of bearing three enables the end cover to have a certain supporting effect on the output shaft of the planetary reducer without affecting its rotation accuracy.

[0015] Preferably, the inner wall of the inner fixed housing is provided with inner ring gears, and the first-stage planetary gear, the second-stage planetary gear and the third-stage planetary gear are all meshed with the inner ring gears.

[0016] Through the above arrangement, the arrangement of the inner ring teeth further restricts the planetary gear, thereby ensuring its stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of a high reduction ratio power device integrated in a micro outer rotor of the present invention is schematically shown. Figure 1 ;

[0018] Figure 2 The structure of a high reduction ratio power device integrated in a micro outer rotor of the present invention is schematically shown. Figure 2 ;

[0019] Figure 3 The structure of a high reduction ratio power device integrated in a micro outer rotor of the present invention is schematically shown. Figure 3 ;

[0020] Figure 4 The structure of a high reduction ratio power device integrated in a micro outer rotor of the present invention is schematically shown. Figure 4 ;

[0021] Figure 5 The structure of a high reduction ratio power device integrated in a micro outer rotor of the present invention is schematically shown. Figure 5 ;

[0022] 1. Motor rotor; 2. Rotor permanent magnet; 3. Stator winding; 4. Stator core; 5. Internal fixed shell; 6. Bearing chamber; 7. Rotor output shaft; 8. Bearing one; 9. End cover straight mouth; 10. Primary planetary gear; 11. Secondary planetary gear; 12. Primary sun gear; 13. Primary planetary gear carrier; 14. Bearing two; 15. Secondary planetary gear carrier; 16. Third-stage planetary gear carrier; 17. Secondary sun gear; 18. Third-stage sun gear; 19. Third-stage planetary gear; 20. End cover; 21. Planetary reducer output shaft; 22. Bearing three; 23. Inner ring gear. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0024] like Figures 1 to 5As shown, a micro outer rotor internal integrated high reduction ratio power device includes a motor rotor 1, a rotor permanent magnet 2, a stator winding 3, a stator core 4, an internal fixed shell 5, an end cover 20 and an end cover straight mouth 9, the internal fixed shell 5 is fixedly connected to the end cover 20, the motor rotor 1 is provided with a bearing chamber 6, the bearing chamber 6 is provided with a bearing 8, the motor rotor 1 and the internal fixed shell 5 are rotatably connected through the bearing 8, the motor rotor 1 is provided with a rotor output shaft 7, the rotor output shaft 7 is fixedly connected with a primary sun gear 12 through a D-shaped shaft hole, the primary sun gear 12 is externally meshed and surrounded by a plurality of sets of primary planetary gears 10, the primary planetary gear 10 is rotatably connected with a primary planetary gear carrier 13, the output shaft of the primary planetary gear carrier 13 is fixedly connected with a secondary sun gear 17 through a D-shaped shaft hole, the secondary sun gear 17 is externally meshed and surrounded by a plurality of sets of secondary planetary gears 11 The secondary planetary gear 11 is rotatably connected to the secondary planetary gear frame 15, and the output shaft of the secondary planetary gear frame 15 is fixedly connected to the third-stage sun gear 18 through a D-type shaft hole. A plurality of sets of third-stage planetary gears 19 are arranged around the third-stage sun gear 18 in meshing engagement. Bearings 2 14 are arranged between the primary planetary gear 10 and the primary planetary gear frame 13, between the secondary planetary gear 11 and the secondary planetary gear frame 15, and between the third-stage planetary gear 19 and the third-stage planetary gear frame 16. An inner ring gear 23 is provided on the inner wall of the internal fixed shell 5. The primary planetary gear 10, the secondary planetary gear 11 and the third-stage planetary gear 19 are all meshed with the inner ring gear 23. The third-stage planetary gear 19 is rotatably connected to the third-stage planetary gear frame 16. The third-stage planetary gear frame 16 is provided with a planetary reducer output shaft 21, and a bearing 3 22 is arranged between the planetary reducer output shaft 21 and the end cover 20.

[0025] The specific implementation process is as follows:

[0026] When the present invention is used, the motor rotor 1 has a permanent magnet to provide the motor NS alternating magnetic field, the stator core 4 of the motor has a tooth slot structure, and the stator winding 3 is wound on the tooth slot. When the stator winding 3 is energized, a rotating magnetic field is generated, and the magnetic field interacts with the NS alternating magnetic field of the permanent magnet of the rotor, thereby generating a torque, and then controlling the rotation of the motor rotor 1; the rotor output shaft 7 drives the primary sun gear 12 to rotate, and the primary sun gear 12 drives the primary planetary gear 10 to rotate while performing a circular motion around its axis, thereby driving the secondary sun gear 17 to rotate through the primary planetary gear carrier 13, so as to achieve the purpose of primary reduction; the secondary sun gear 17 drives the secondary planetary gear 11 to rotate, and at the same time makes it perform a circular motion around the axis of the sun gear, thereby driving the tertiary sun gear 18 to rotate through the secondary planetary gear carrier 15, so as to achieve the purpose of secondary reduction; the tertiary sun gear 18 drives the tertiary planetary gear 19 to rotate, and at the same time makes it perform a circular motion around the axis of the tertiary sun gear 18, thereby driving the planetary reducer output shaft 21 to rotate through the tertiary planetary gear carrier 16, so as to achieve the purpose of tertiary reduction.

[0027] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A micro outer rotor with an integrated high reduction ratio power device, characterized in that: The invention comprises a motor rotor (1), a rotor permanent magnet (2), a stator winding (3), a stator core (4), an internal fixed shell (5), an end cover (20) and an end cover straight opening (9), wherein the internal fixed shell (5) is fixedly connected to the end cover (20), the motor rotor (1) is rotatably connected to the internal fixed shell (5), the motor rotor (1) is provided with a rotor output shaft (7), the rotor output shaft (7) is fixedly connected to a primary sun gear (12) through a D-shaped shaft hole, the primary sun gear (12) is externally meshed and surrounded by a plurality of groups of primary planetary gears (10), the primary planetary gears (10) are rotatably connected to a primary planetary gear carrier (13), the primary The output shaft of the planetary gear carrier (13) is fixedly connected to a secondary sun gear (17) via a D-shaped shaft hole; the secondary sun gear (17) is externally meshed with and surrounded by a plurality of sets of secondary planetary gears (11); the secondary planetary gears (11) are rotatably connected to a secondary planetary gear carrier (15); the output shaft of the secondary planetary gear carrier (15) is fixedly connected to a tertiary sun gear (18) via a D-shaped shaft hole; the tertiary sun gear (18) is externally meshed with and surrounded by a plurality of sets of tertiary planetary gears (19); the tertiary planetary gears (19) are rotatably connected to a tertiary planetary gear carrier (16); the tertiary planetary gear carrier (16) is provided with a planetary reducer output shaft (21).

2. According to claim 1, a micro outer rotor integrated high reduction ratio power device is characterized in that: The motor rotor (1) is provided with a bearing chamber (6), the bearing chamber (6) is provided with a bearing 1 (8), and the motor rotor (1) is rotatably connected to the internal fixed shell (5) via the bearing 1 (8).

3. According to claim 1, a micro outer rotor integrated high reduction ratio power device is characterized in that: Bearing 2 (14) is arranged between the first-stage planetary gear (10) and the first-stage planetary gear carrier (13), between the second-stage planetary gear (11) and the second-stage planetary gear carrier (15), and between the third-stage planetary gear (19) and the third-stage planetary gear carrier (16).

4. According to claim 1, a micro outer rotor integrated high reduction ratio power device is characterized in that: A bearing three (22) is provided between the planetary reducer output shaft (21) and the end cover (20).

5. According to claim 1, a micro outer rotor integrated high reduction ratio power device is characterized in that: The inner wall of the internal fixed housing (5) is provided with inner ring teeth (23), and the first-stage planetary gear (10), the second-stage planetary gear (11) and the third-stage planetary gear (19) are all meshed with the inner ring teeth (23).

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