Miniature differential planetary gear motor applied to household appliance industry

Abstract

The utility model relates to the technical field of miniature speed reduction motors, in particular to a miniature differential planetary speed reduction motor applied to the household appliance industry, which comprises a motor and a speed reduction mechanism, and the speed reduction mechanism comprises a shell assembly and a speed reduction assembly arranged in the shell assembly. The speed reduction assembly comprises a sun gear arranged on a motor rotating shaft, an output rotating plate arranged on the sun gear and matched with the sun gear in a relative rotating mode, and an output shaft arranged on the output rotating plate. The lower planetary gears are rotationally arranged on the connecting part and are meshed with the sun gear; the upper planetary gears are rotationally arranged at the bottom of the output rotating plate and are meshed with the sun gear; the differential gear ring assembly is rotationally arranged in the shell sleeve and matched with the lower planetary gear and the upper planetary gear to enable the upper planetary gear to decelerate so as to enable the upper planetary gear and the sun gear to generate a speed difference, the speed reduction mechanism can decelerate the motor, the output shaft can output larger torque, and output of the output shaft is more stable.

Description

Technical field

[0001] The utility model relates to the technical field of micro reduction motors, and in particular to a micro differential planetary reduction motor used in the household appliance industry. [Background Technology]

[0002] A reduction motor refers to an integration of a reducer and an electric motor (motor). This integration is also commonly called a gear motor or gear motor. It is usually integrated and assembled by a professional reducer manufacturer and supplied as a complete set. Reducer motors are widely used in the steel industry, machinery industry, etc. The advantage of using a reduction motor is that it simplifies the design and saves space.

[0003] The traditional reduction motor directly sets a large reduction gear to cooperate with the gear on the motor shaft, and the output shaft is set on the large reduction gear. In this way, the output shaft and the motor shaft are eccentrically set, and the large reduction gear is subjected to unilateral force, which will cause unstable output. For example, a reduction motor disclosed in application number "201520753822.7" adopts a reduction scheme that directly reduces speed through a large reduction gear that cooperates with the gear on the motor. In this way, the output shaft and the motor shaft are not coaxially set, which is prone to unstable rotation.

[0004] In order to achieve a large reduction ratio, the large reduction gear will extend far beyond the side of the original motor, causing one side to bulge. In this way, during installation, it is necessary to consider the installation space of the protruding part, which increases the design and manufacturing difficulty, thereby increasing production costs and wasting more space.

[0005] In addition, this type of reduction motor is generally used in the field of home appliances, and its size is relatively small, such as the motor of the air outlet of the air conditioner, the lifting motor of the curtain and the surveillance camera, which makes the pursuit of lightweight and small size more difficult to achieve.

[0006] In view of the above technical problems, the present invention is proposed in this study. [Summary of the invention]

[0007] The present invention provides a micro differential planetary reduction motor for use in the household appliance industry, which can reduce the speed of the motor output, and can achieve a smoother output with a more compact structure, thereby preventing the reduction motor from having an unstable output and solving the problem of the existing reduction motor being oversized.

[0008] To solve the above technical problems, the present invention proposes a micro differential planetary reduction motor for use in the household appliance industry, comprising a motor and a reduction mechanism, wherein the reduction mechanism comprises a housing assembly and a reduction assembly disposed in the housing assembly;

[0009] The housing assembly includes a housing and a connecting portion formed at the bottom of the housing, the connecting portion being fixedly connected to the motor housing, and the housing assembly also includes a cover plate that confines the reduction assembly in the housing;

[0010] The reduction assembly includes a sun gear mounted on a motor shaft, an output rotating plate mounted on the sun gear and rotatably engaged with the sun gear, and an output shaft mounted on the output rotating plate. The reduction assembly also includes a plurality of lower planetary gears rotatably mounted on a connecting portion and meshing with the sun gear, a plurality of upper planetary gears rotatably mounted on a bottom of the output rotating plate and meshing with the sun gear, and a differential ring gear assembly rotatably mounted in a housing and engaging with the lower planetary gears and the upper planetary gears to reduce the speed of the upper planetary gears and thereby generate a speed difference between the upper planetary gears and the sun gear.

[0011] The cover plate restricts the output rotating plate in the shell and is rotatably connected relative to the output rotating plate. The upper portion of the output shaft passes through the cover plate and is rotatably connected to the cover plate.

[0012] As described above, in a micro differential planetary reduction motor used in the household appliance industry, the outer shell of the differential ring gear assembly is provided with a ring gear sleeve rotatably connected thereto.

[0013] As described above, a micro differential planetary reduction motor for the home appliance industry, the differential ring gear assembly includes a lower ring gear meshing with the lower planetary gear and an upper ring gear meshing with the upper planetary gear. The upper ring gear and the lower ring gear are arranged to move together, and the upper ring gear and the lower ring gear have the same module, and the number of teeth of the upper ring gear is less than the number of teeth of the lower ring gear.

[0014] In the micro differential planetary reduction motor used in the household appliance industry, a clamping block is formed on the lower gear ring, and a clamping groove for cooperating with the clamping block is formed on the upper gear ring.

[0015] As described above, a micro differential planetary reduction motor used in the home appliance industry has a rotation hole formed at the bottom of the output shaft, and the motor shaft passes through the sun gear and rotates in the rotation hole.

[0016] As described above, in a micro differential planetary reduction motor for the home appliance industry, the planetary reduction assembly further includes a shaft sleeve arranged in the cover plate, and the shaft sleeve is rotatably connected to the cover plate, and the output shaft passes through the shaft sleeve.

[0017] In the micro differential planetary reduction motor used in the household appliance industry, a limiting portion for separating the output rotating plate from the cover plate is formed along the circumferential direction on the outer side of the lower end of the shaft sleeve.

[0018] As described above, a micro differential planetary reduction motor for the home appliance industry has a hole for installing a shaft sleeve formed in the middle of the cover plate, and the hole is flanged upward, and the shaft sleeve is embedded in the flange.

[0019] In the micro differential planetary reduction motor used in the household appliance industry as described above, the axial thickness of the reduction mechanism is smaller than the axial thickness of the motor.

[0020] As described above, a micro differential planetary reduction motor for the home appliance industry is provided with three upper planetary gears and three lower planetary gears. The three lower planetary gears are equidistantly arranged around the sun gear and rotatably arranged on the connecting portion, and the three upper planetary gears are equidistantly arranged around the sun gear and rotatably arranged at the bottom of the output rotating plate.

[0021] Compared with the prior art, the micro differential planetary reduction motor of the present invention applied to the household appliance industry has the following advantages:

[0022] 1. The output shaft of the present application is coaxially arranged with the motor shaft, and after a plurality of upper planetary gears and a differential ring gear assembly are matched, the upper planetary gears drive the output rotating plate to rotate, and the output rotating plate then drives the output shaft to reduce the output, which can output a greater torque.

[0023] 2. This application cooperates with the sun gear through multiple upper planetary gears, and the multiple upper planetary gears revolve around the sun gear, thereby driving the output rotating plate to rotate, thereby driving the output shaft to move, so that the force of the entire reduction motor can be more balanced and the output is more stable.

[0024] 3. The axial thickness of the reduction mechanism of the present application is smaller than the axial thickness of the motor, which can make the entire reduction motor flatter and smaller in size.

Brief Description of the Drawings

[0025] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a structural diagram of the present utility model.

[0027] Figure 2 It is a cross-sectional view of the present utility model.

[0028] Figure 3 It is one of the exploded structural diagrams of the speed reduction mechanism in the utility model.

[0029] Figure 4 This is the second schematic diagram of the decomposition structure of the speed reduction mechanism in the present invention.

[0030] Figure 5 This is the third schematic diagram of the decomposition structure of the speed reduction mechanism in the present invention.

[0031] Figure 6 This is the fourth schematic diagram of the decomposition structure of the speed reduction mechanism in the present invention.

[0032] Figure 7It is a structural diagram of the sun gear in the utility model.

[0033] Figure 8 It is a structural schematic diagram of the upper planetary gear in the utility model.

[0034] In the figure: 1, motor; 2, speed reduction mechanism; 3, housing assembly; 30, housing; 31, connection part; 32, cover plate; 33, mounting part;

[0035] 4. Speed ​​reduction assembly; 40. Sun gear; 41. Output rotating plate; 42. Output shaft; 420. Rotating hole; 43. Lower planetary gear; 44. Upper planetary gear;

[0036] 45. Differential gear ring assembly; 46. Gear ring sleeve; 460. Lower gear ring; 461. Upper gear ring; 462. Clamping block; 463. Clamping slot;

[0037] 47. Bushing; 48. Limiting portion; 49. Hole. [Specific implementation method]

[0038] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-8 As shown, the present invention includes a micro differential planetary reduction motor used in the home appliance industry, including a motor 1 and a reduction mechanism 2. The reduction mechanism 2 includes a housing assembly 3 and a reduction assembly 4 arranged in the housing assembly 3.

[0040] The housing assembly 3 includes a housing 30 and a connecting portion 31 formed at the bottom of the housing 30. The connecting portion 31 is fixedly connected to the housing of the motor 1. The housing assembly 3 also includes a cover plate 32 that confines the reduction assembly 4 within the housing 30. When securing the housing 30, bolts can be passed through the connecting portion 31 and then locked to the housing of the motor 1.

[0041] The reduction assembly 4 includes a sun gear 40 mounted on the rotating shaft of the motor 1, an output rotating plate 41 mounted on the sun gear 40 and rotatably engaged with the sun gear 40, and an output shaft 42 mounted on the output rotating plate 41. The reduction assembly 4 also includes a plurality of lower planetary gears 43 rotatably mounted on the connecting portion 31 and meshing with the sun gear 40, a plurality of upper planetary gears 44 rotatably mounted on the bottom of the output rotating plate 41 and meshing with the sun gear 40, and a differential ring gear assembly 45 rotatably mounted within the housing 30 and cooperating with the lower planetary gears 43 and the upper planetary gears 44 to reduce the speed of the upper planetary gears 44, thereby generating a speed difference between the upper planetary gears 44 and the sun gear 40. It should be noted that after the housing 30 is secured to the motor 1, the rotating shaft of the motor 1 passes through the connecting portion 31 and is fixedly connected to the sun gear 40, thereby driving the sun gear 40 to rotate.

[0042] The cover plate 32 restricts the output rotating plate 41 in the housing 30 and is rotatably connected relative to the output rotating plate 41 . The upper portion of the output shaft 42 passes through the cover plate 32 and is rotatably connected to the cover plate 32 .

[0043] In this embodiment, the motor 1 drives the sun gear 40, which in turn drives the lower planetary gears 43 to rotate. The rotation of the lower planetary gears 43 drives the differential gear ring assembly 45, which in turn drives the upper planetary gears 44. After the upper planetary gears 44 are decelerated by the differential gear ring assembly 45, a speed difference exists between the upper planetary gears 44 and the sun gear 40. The sun gear 40's rotation speed is greater than the upper planetary gears 44's. As a result, the sun gear 40 drives the upper planetary gears 44 to rotate around itself. That is, the upper planetary gears 44, while rotating, revolve around the sun gear 40, further reducing the speed. The upper planetary gears 44 are mounted on the bottom of the output rotating plate 41. Therefore, the upper planetary gears 44 can drive the output rotating plate 42 to rotate, which in turn drives the output shaft 42 to rotate, thereby reducing speed and increasing torque.

[0044] The traditional reduction motor directly sets a large reduction gear to cooperate with the gear on the rotating shaft of the motor 1, and the output shaft 42 is set on the large reduction gear. In this way, the output shaft 42 and the rotating shaft of the motor 1 are eccentrically set. The large reduction gear is subjected to unilateral force, which will cause unstable output. In addition, in order to achieve a large reduction ratio, the large reduction gear will far exceed the side of the original motor 1, causing one side to bulge. In this way, during installation, it is necessary to consider the installation space of the bulging part, which increases the difficulty of design and manufacturing, thereby increasing production costs and wasting more space. In addition, this type of reduction motor is generally used in the field of home appliances, and its size is relatively small, such as the motor of the air outlet of the air conditioner, the lifting motor of the curtain, etc., which makes the pursuit of lightweight and small size more difficult to achieve.

[0045] The output shaft 42 of the present application is coaxially arranged with the original motor 1 shaft, and after a plurality of upper planetary gears 44 cooperate with the differential ring gear assembly 45, the upper planetary gears 44 drive the output rotating plate 41 to rotate, and the output rotating plate 41 drives the output shaft 42 to reduce the output, so that the force of the entire reduction motor can be more balanced. Compared with traditional reduction motors, the reduction motor of the present application can be more stable and occupy a smaller volume.

[0046] like Figure 3As shown, as a further solution of this embodiment, in order to make the differential gear ring assembly 45 rotate more smoothly, a gear ring sleeve 46 is provided on the outer shell of the differential gear ring assembly 45 and is rotatably connected thereto. The gear ring sleeve 46 is made of copper and can reduce friction of the differential gear ring assembly 45. In addition, the provision of the gear ring sleeve 46 can prevent the differential gear ring assembly 45 from directly contacting the housing 30 and can also provide sound insulation, thereby reducing the noise of the entire reduction motor.

[0047] like Figure 5 As shown, as a further solution of this embodiment, the differential ring gear assembly 45 includes a lower ring gear 460 meshing with the lower planetary gears 43 and an upper ring gear 461 meshing with the upper planetary gears 44. The upper ring gear 461 is provided with the lower ring gear 460 and has the same module as the lower ring gear 460. The number of teeth of the upper ring gear 461 is less than that of the lower ring gear 460. A clamping block 462 is formed on the lower ring gear 460, and a clamping groove 463 is formed on the upper ring gear 461 to cooperate with the clamping block 462. In this embodiment, the differential ring gear assembly 45 is divided into two parts, consisting of an upper ring gear 461 and a lower ring gear 460, which can reduce the difficulty of production. In addition, the upper ring gear 461 has the same module as the lower ring gear 460, and the number of teeth of the upper ring gear 461 is smaller than the number of teeth of the lower ring gear 460. Correspondingly, the module of the upper planetary gear 44 is the same as the module of the lower planetary gear 43, and the number of teeth of the upper planetary gear 44 is the same as the number of teeth of the lower planetary gear 43. In this way, after transmission through the differential ring gear assembly 45, the upper planetary gear 44 can be decelerated, thereby creating a speed difference between the upper planetary gear 44 and the sun gear 40.

[0048] like Figure 2 As shown, as a further embodiment of this embodiment, a rotation hole 420 is formed at the bottom of the output shaft 42. The rotating shaft of the motor 1 rotates in rotation with the rotation hole 420 after passing through the sun gear 40. In this embodiment, by providing a rotation hole 420 at the bottom of the output shaft 42, so that the rotating shaft of the motor 1 extends into the rotation hole 420 for rotational engagement, the coaxiality of the output shaft 42 and the rotating shaft of the motor 1 can be further improved, thereby making the operation of the entire reduction gear mechanism 2 more stable.

[0049] like Figure 3 As shown, as a further solution to this embodiment, to further stabilize the rotation of the output shaft 42, the planetary reduction assembly 4 further includes a sleeve 47 disposed within the cover plate 32. The sleeve 47 is rotatably connected to the cover plate 32, and the output shaft 42 extends through the sleeve 47. A stopper 48 is circumferentially formed on the outer side of the lower end of the sleeve 47 for separating the output rotating plate 41 from the cover plate 32. The provision of the sleeve 47 allows for smoother rotation of the output shaft 42. Simultaneously, the stopper 48 separates the output rotating plate 41 from the cover plate 32, thereby reducing friction on the output rotating plate 41, thereby minimizing energy loss and ensuring smoother rotation.

[0050] like Figure 3 As shown, as a further embodiment of this embodiment, a hole 49 for mounting a sleeve 47 is formed in the middle of the cover plate 32. The hole 49 is flanged upward, and the sleeve 47 is embedded in the flange. This embodiment, by flanged upward at the hole 49, can strengthen the position of the sleeve 47, making the rotation of the sleeve 47 more stable, and further ensuring the rotation of the output shaft 42 more stable.

[0051] like Figure 3 As shown, as a further solution of this embodiment, in order to facilitate the installation of the entire reduction motor, a plurality of mounting portions 33 are formed on the side of the cover plate 32. The mounting portions 33 can facilitate the reduction motor to be fixed in a desired position. In addition, mounting holes can be provided in the mounting portions 33 to facilitate the fastening with bolts.

[0052] As a further solution of this embodiment, the axial thickness of the reduction mechanism 2 is smaller than the axial thickness of the motor 1. Generally speaking, the larger the volume of the motor 1, the greater its power. This is because a large-volume motor 1 can accommodate more rotors and coils, thereby providing a greater energy output. If one wants to reduce the volume of the motor 1 while keeping the output power unchanged, the technical difficulty is very high. In the field of home appliances, such as surveillance cameras, motors for air-conditioning outlets, and curtain lifting motors, this kind of micro motor, in the process of compressing the entire reduction motor, more needs to be compressed in the reduction mechanism 2 part, and the existing method of decelerating the motor 1 using a multi-stage deceleration method will cause the overall volume to be relatively large.

[0053] In the present invention, after the lower planetary gear 43 is driven by the differential ring gear assembly 45, the upper planetary gear 44 can be decelerated, so that there is a speed difference between the upper planetary gear 44 and the sun gear 40, thereby driving the upper planetary gear 44 to revolve around the sun gear 40. Since the upper planetary gear 44 is connected to the output rotating plate 41, it can drive the output rotating plate 41 to rotate, and then drive the output shaft 42 to rotate. Without the need for multi-stage deceleration, a large-scale deceleration can be achieved, so that the axial thickness of the deceleration mechanism 2 can be smaller than the axial thickness of the motor 1, making the entire reduction motor flatter and smaller in size.

[0054] As a further solution to this embodiment, three upper planetary gears 44 and three lower planetary gears 43 are each provided. The three lower planetary gears 43 are equidistantly spaced and rotatably mounted on the connecting portion 31, surrounding the sun gear 40. The three upper planetary gears 44 are equidistantly spaced and rotatably mounted on the bottom of the output rotating plate 41. In this embodiment, by providing three upper planetary gears 44 and three lower planetary gears 43, and surrounding the sun gear 40, the forces acting on the sun gear 40 are more balanced. Furthermore, the presence of three upper planetary gears 44 also stabilizes the forces acting on the output rotating plate 41 when driving the output rotating plate 41, thereby further stabilizing the output.

Claims

1. A micro differential planetary reduction motor used in the home appliance industry, characterized by The invention comprises a motor (1) and a reduction mechanism (2), wherein the reduction mechanism (2) comprises a housing assembly (3) and a reduction assembly (4) arranged in the housing assembly (3); The housing assembly (3) includes a housing (30) and a connecting portion (31) formed at the bottom of the housing (30), wherein the connecting portion (31) is fixedly connected to the housing of the motor (1). The housing assembly (3) also includes a cover plate (32) for confining the reduction assembly (4) in the housing (30). The reduction assembly (4) includes a sun gear (40) arranged on the rotating shaft of the motor (1), an output rotating plate (41) arranged on the sun gear (40) and relatively rotatingly matched with the sun gear (40), and an output shaft (42) arranged on the output rotating plate (41), and also includes a plurality of lower planetary gears (43) rotatably arranged on the connecting portion (31) and meshing with the sun gear (40), a plurality of upper planetary gears (44) rotatably arranged at the bottom of the output rotating plate (41) and meshing with the sun gear (40), and a differential gear ring assembly (45) rotatably arranged in the housing (30) and cooperating with the lower planetary gears (43) and the upper planetary gears (44) to reduce the speed of the upper planetary gears (44) and thereby generate a speed difference between the upper planetary gears (44) and the sun gear (40); The cover plate (32) restricts the output rotating plate (41) in the shell (30) and is rotatably connected relative to the output rotating plate (41). The upper portion of the output shaft (42) passes through the cover plate (32) and is rotatably connected to the cover plate (32).

2. A micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that The outer shell of the differential gear ring assembly (45) is provided with a gear ring sleeve (46) which is rotatably connected thereto.

3. The micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that The differential ring gear assembly (45) includes a lower ring gear (460) meshed with the lower planetary gear (43) and an upper ring gear (461) meshed with the upper planetary gear (44). The upper ring gear (461) and the lower ring gear (460) are arranged to move simultaneously, and the upper ring gear (461) and the lower ring gear (460) have the same module. The number of teeth of the upper ring gear (461) is less than the number of teeth of the lower ring gear (460).

4. A micro differential planetary reduction motor for home appliance industry according to claim 3, characterized in that A clamping block (462) is formed on the lower gear ring (460), and a clamping groove (463) that cooperates with the clamping block (462) is formed on the upper gear ring (461).

5. The micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that A rotation hole (420) is formed at the bottom of the output shaft (42), and the rotating shaft of the motor (1) passes through the sun gear (40) and rotates in conjunction with the rotation hole (420).

6. The micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that The planetary reduction assembly (4) further comprises a shaft sleeve (47) arranged in the cover plate (32), wherein the shaft sleeve (47) is rotatably connected to the cover plate (32), and the output shaft (42) passes through the shaft sleeve (47).

7. A micro differential planetary reduction motor for home appliance industry according to claim 6, characterized in that A limiting portion (48) for separating the output rotating plate (41) and the cover plate (32) is formed on the outer side of the lower end of the shaft sleeve (47) along the circumferential direction.

8. The micro differential planetary reduction motor for home appliance industry according to claim 6, characterized in that A hole (49) for installing the shaft sleeve (47) is formed in the middle of the cover plate (32), and the hole (49) is turned upward, and the shaft sleeve (47) is embedded in the turned edge.

9. The micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that The axial thickness of the speed reduction mechanism (2) is smaller than the axial thickness of the motor (1).

10. The micro differential planetary reduction motor for home appliance industry according to claim 1, characterized in that There are three upper planetary gears (44) and three lower planetary gears (43). The three lower planetary gears (43) are equidistantly arranged around the sun gear (40) and are rotatably arranged on the connecting portion (31). The three upper planetary gears (44) are equidistantly arranged around the sun gear (40) and are rotatably arranged on the bottom of the output rotating plate (41).

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