Speed reduction motor adopting planetary reducer and servo motor

Abstract

The utility model relates to a speed reduction motor adopting a planetary reducer and a servo motor, which comprises a shell, the servo motor, the planetary reducer and a speed reduction motor output shaft, the servo motor output shaft is provided with a hobbing which is integrally formed, and the planetary reducer is arranged in the shell. The planetary reducer comprises a gear ring and a planetary gear used for driving an output shaft of the gear motor to rotate, the planetary gear is in meshed connection with the hobbing gear, the gear ring surrounds the outer side of the planetary gear and is in meshed connection with the planetary gear, the gear ring is fixedly connected to the shell, and the output shaft of the gear motor is arranged outside the shell. One end of an output shaft of the speed reducing motor extends into the shell to be connected with the planetary gear and is rotationally connected with an output shaft of the servo motor through a bearing, a bearing mounting inner hole for accommodating the bearing is formed in the output shaft of the speed reducing motor, and the bearing is arranged on the outer side of the output shaft of the servo motor in a sleeving manner and is arranged in the bearing mounting inner hole; the gear motor provided by the utility model is simple in structure, and has extremely high torque and volume-weight ratio under extremely small volume and weight.

Description

Technical Field

[0001] This utility model relates to the field of geared motor technology, and in particular to a geared motor that uses a planetary reducer and a servo motor. Background Technology

[0002] A geared motor is an electromechanical integrated device composed of a speed reduction mechanism and a drive motor. It is mainly used to reduce speed and increase torque, and to achieve transmission matching between the power source and the actuator. Its core structure can be divided into gear transmission, worm gear transmission or planetary gear transmission, etc., and the speed reduction and torque increase effect is achieved through multi-stage gear meshing.

[0003] Chinese utility model patent CN212360666U discloses a planetary geared motor, including a gearbox and a motor. The gearbox has at least one planetary carrier plate, and several planetary gears are fixed on the planetary carrier plate by axles. The motor shaft extends into the gearbox and is linked with the planetary gears. The planetary carrier plate has at least two axle hole groups, each axle hole group including at least three axle holes for fixing axles. The axle holes in each axle hole group are arranged in a ring with the axle shaft as the center. The distance between the axle hole axis and the axle shaft axis is different in different axle hole groups.

[0004] However, although the planetary geared motors mentioned above achieve high speed ratio transmission, they still have some drawbacks: whether the sun gear is installed independently or the bearing is installed externally, the axial dimension of the geared motor is increased, the number of parts is large, and the structure is not compact enough.

[0005] Therefore, this utility model proposes a geared motor that uses a planetary reducer and a servo motor to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a geared motor that uses a planetary reducer and a servo motor, which has a compact structure and achieves a large speed ratio transmission.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a geared motor using a planetary reducer and a servo motor, the innovation of which is: including a housing, a servo motor, a planetary reducer and a geared motor output shaft;

[0008] The servo motor is mounted on the housing, and the output shaft of the servo motor has an integrally formed hobbing gear.

[0009] The planetary reducer is installed inside the housing. The planetary reducer includes a gear ring and planetary gears for driving the output shaft of the geared motor to rotate. The planetary gears are meshed with hobbing gears. The gear ring surrounds the outside of the planetary gears and meshes with them. The gear ring is fixedly connected to the housing.

[0010] The output shaft of the geared motor is located outside the housing. One end of the output shaft extends into the housing and is connected to the planetary gear. It is also rotatably connected to the output shaft of the servo motor through a bearing. The output shaft of the geared motor has a bearing mounting hole to accommodate the bearing. The bearing is fitted on the outside of the output shaft of the servo motor and is housed in the bearing mounting hole.

[0011] Furthermore, the output shaft of the geared motor includes a planetary carrier, which is located at the end of the output shaft of the geared motor and is integrally formed with the output shaft of the geared motor, and the planetary gears are mounted on the planetary carrier.

[0012] Furthermore, the planetary carrier has a T-shaped groove in the middle for mounting planetary gears, the planetary gears are set in the T-shaped grooves, and the two ends of the planetary gears are rotatably connected to the planetary carrier.

[0013] Furthermore, the gear ring is wrapped around the outside of the planet carrier, and the side wall of the planet carrier has a through groove for the planet gear to extend out, through which the planet gear passes and meshes with the gear ring.

[0014] Furthermore, the bearing mounting bore is formed on the bottom surface of the T-slot, and the bearing mounting bore extends into the output shaft of the geared motor.

[0015] Furthermore, the bearing mounting bore has a bearing outer ring limiting step surface, the output shaft end of the servo motor has a reduced diameter section and a bearing inner ring limiting step surface, the bearing is mounted on the reduced diameter section of the servo motor output shaft, and the two sides of the bearing abut against the bearing outer ring limiting step surface and the bearing inner ring limiting step surface, respectively.

[0016] Furthermore, the servo motor is mounted on the outside of the housing and cooperates with the housing to form a planetary reducer mounting cavity, with the ring gear and planetary gears arranged inside the planetary reducer mounting cavity.

[0017] Furthermore, the tooth profile of the planetary reducer is either straight or helical.

[0018] The advantages of this utility model are:

[0019] (1) The geared motor of this utility model uses the hobbing gear on the output shaft of the servo motor as the sun gear of the planetary reducer, merges the output shaft of the geared motor and the output shaft of the planetary reducer into the same shaft, and uses a bearing to cleverly combine the output shaft of the geared motor and the output shaft of the servo motor, thereby achieving stable support for the two components, effectively reducing the number of parts. Furthermore, the bearing adopts an internal installation method, which effectively shortens the axial dimension. The structure is extremely simplified, enabling the geared motor to have a very high torque and volume-to-weight ratio in a very small volume and weight.

[0020] (2) The planetary carrier and the output shaft of the geared motor are integrally formed, with high connection strength. At the same time, the planetary carrier and the output shaft of the geared motor are highly coaxial, and no precision assembly is required.

[0021] (3) By opening a T-shaped groove in the middle of the planetary carrier, the planetary gear is set in the T-shaped groove and both ends of the planetary gear are connected to the planetary carrier, so that the force is uniform and the stability of the planetary reducer is improved.

[0022] (4) By wrapping the gear ring around the outside of the planetary carrier, the geared motor can increase the reduction ratio by using the planetary reducer without increasing the axial dimension.

[0023] (5) The bearing mounting inner hole of this utility model is opened on the bottom surface of the T-shaped groove, and the bearing mounting inner hole extends into the output shaft of the geared motor, which can effectively shorten the axial dimension of the output shaft of the geared motor.

[0024] (6) The bearing of this utility model is axially limited by the bearing outer ring limiting step surface and the bearing inner ring limiting step surface during installation.

[0025] (7) By mounting the servo motor on the outside of the housing, this utility model facilitates heat dissipation and maintenance of the servo motor.

[0026] (8) The planetary reducer with straight tooth profile of this utility model has a simple structure, is easy to manufacture, and has low cost. It is suitable for application scenarios with small loads. The planetary reducer with helical tooth profile has smoother transmission, higher precision, and less noise. It is suitable for application scenarios with precision transmission and high load transmission. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of the geared motor of this utility model.

[0029] Figure 2 This is a schematic diagram of the output shaft of the geared motor of this utility model. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0031] Example

[0032] This embodiment provides a geared motor employing a planetary reducer and a servo motor, such as Figure 1-2As shown, it includes a housing 2, a servo motor 1, a planetary reducer, and a geared motor output shaft 5.

[0033] To facilitate heat dissipation and maintenance of the servo motor 1, the servo motor 1 is mounted on the outside of the housing 2. The housing 2 and the servo motor 1 cooperate to form a planetary reducer mounting cavity 201, and the planetary reducer is installed inside the planetary reducer mounting cavity 201. The output shaft of the servo motor 1 extends into the planetary reducer mounting cavity 201, and the output shaft of the servo motor 1 has an integrally formed hobbing gear 101. The planetary reducer is installed inside the planetary reducer mounting cavity 201 of the housing 2. The planetary reducer includes a gear ring 4 and three planetary gears 3 for driving the output shaft 5 of the geared motor to rotate. The three planetary gears 3 are meshed with the hobbing gear 101. The gear ring 4 surrounds the outside of the three planetary gears 3 and is meshed with the planetary gears 3. The gear ring 4 is fixedly connected to the inner wall of the housing 2.

[0034] The output shaft 5 of the geared motor is located on the side of the housing 2 away from the servo motor 1. The output shaft 5 includes a planetary carrier 501, which is located at the end of the output shaft 5 and integrally formed with it. The housing 2 has a first through hole through which the planetary carrier 501 passes. The planetary carrier 501 passes through the first through hole and enters the planetary reducer mounting cavity 201 of the housing 2. Three planetary gears 3 are rotatably mounted on the planetary carrier 501. The middle of the planetary carrier 501 has a T-shaped groove for mounting the planetary gears 3. All three planetary gears 3 are set in the T-shaped groove. The planetary carrier 501 has six pairs of second through holes. The two ends of the three planetary gears 3 are rotatably mounted in the two second through holes at corresponding positions on the planetary carrier 501. When the planetary gears 3 rotate, the force on both sides is uniform, achieving stable operation. To ensure that the geared motor can increase the reduction ratio using a planetary reducer without increasing the axial dimension, the gear ring 4 is wrapped around the outside of the planetary carrier 501. The side wall of the planetary carrier 501 has three through slots 504 for the planetary gears 3 to extend out. The three planetary gears 3 pass through the corresponding through slots 504 and mesh with the gear ring 4.

[0035] The end of the geared motor output shaft 5 is rotatably connected to the output shaft of the servo motor 1 via a bearing 6. A bearing mounting inner hole 502 for accommodating the bearing 6 is formed on the bottom surface of the T-shaped groove of the planetary carrier 501 of the geared motor output shaft 5. The bearing mounting inner hole 502 extends into the geared motor output shaft 5, effectively shortening the axial dimension of the geared motor output shaft 5. The bearing mounting inner hole 502 has a bearing outer ring limiting step surface 503. The end of the servo motor 1 output shaft has a reduced diameter section 102 and a bearing inner ring limiting step surface 103. When the end of the geared motor output shaft 5 is connected to the output shaft of the servo motor 1, the bearing 6 is fitted onto the reduced diameter section 102 of the servo motor 1 output shaft. The bearing 6 is installed within the bearing mounting inner hole 502, and both sides of the bearing 6 abut against the bearing outer ring limiting step surface 503 and the bearing inner ring limiting step surface 103 respectively, providing axial limiting.

[0036] In this embodiment, the planetary reducer can adopt a straight tooth profile, which is simple in structure, easy to manufacture, and low in cost, and is suitable for applications with small loads. Alternatively, a helical tooth profile can be adopted, which provides smoother transmission, higher precision, and less noise, and is suitable for applications involving precision transmission and high-load transmission.

[0037] When the geared motor is in operation, it starts the servo motor 1. The hobbing gear 101 on the output shaft of the servo motor 1 rotates, which drives the three planetary gears 3 to rotate around the hobbing gear 101. The three planetary gears 3 drive the output shaft 5 of the geared motor to rotate, thereby realizing power output.

[0038] The geared motor uses the hobbing gear 101 on the output shaft of the servo motor 1 as the sun gear of the planetary reducer, and merges the output shaft 7 of the geared motor and the output shaft of the planetary reducer into the same shaft. A bearing 6 is used to cleverly combine the output shaft 7 of the geared motor and the output shaft of the servo motor 1, so as to achieve stable support for the two components at the same time, effectively reducing the number of parts. Furthermore, the bearing 6 adopts a built-in mounting method, which effectively shortens the axial dimension. The structure is extremely simplified, enabling the geared motor to have extremely high torque and volume-to-weight ratio in a very small volume and weight.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A geared motor employing a planetary reducer and a servo motor, characterized in that: Includes housing, servo motor, planetary reducer, and geared motor output shaft; The servo motor is mounted on the housing, and the output shaft of the servo motor has an integrally formed hobbing gear. The planetary reducer is installed inside the housing. The planetary reducer includes a gear ring and planetary gears for driving the output shaft of the geared motor to rotate. The planetary gears are meshed with hobbing gears. The gear ring surrounds the outside of the planetary gears and meshes with them. The gear ring is fixedly connected to the housing. The output shaft of the geared motor is located outside the housing. One end of the output shaft extends into the housing and is connected to the planetary gear. It is also rotatably connected to the output shaft of the servo motor through a bearing. The output shaft of the geared motor has a bearing mounting hole to accommodate the bearing. The bearing is fitted on the outside of the output shaft of the servo motor and is housed in the bearing mounting hole.

2. The geared motor employing a planetary reducer and a servo motor according to claim 1, characterized in that: The output shaft of the geared motor includes a planetary carrier, which is located at the end of the output shaft and integrally formed with it. The planetary gears are mounted on the planetary carrier.

3. The geared motor employing a planetary reducer and a servo motor according to claim 2, characterized in that: The planetary carrier has a T-shaped groove in the middle for mounting planetary gears. The planetary gears are set in the T-shaped groove, and both ends of the planetary gears are rotatably connected to the planetary carrier.

4. The geared motor employing a planetary reducer and a servo motor according to claim 3, characterized in that: The gear ring is wrapped around the outside of the planet carrier, and the side wall of the planet carrier has a through slot for the planet gear to extend out. The planet gear passes through the through slot and meshes with the gear ring.

5. The geared motor employing a planetary reducer and a servo motor according to claim 3, characterized in that: The bearing mounting bore is formed on the bottom surface of the T-slot and extends into the output shaft of the geared motor.

6. The geared motor employing a planetary reducer and a servo motor according to claim 5, characterized in that: The bearing mounting bore has a bearing outer ring limiting step surface, the output shaft end of the servo motor has a reduced diameter section and a bearing inner ring limiting step surface, the bearing is mounted on the reduced diameter section of the servo motor output shaft, and the two sides of the bearing abut against the bearing outer ring limiting step surface and the bearing inner ring limiting step surface, respectively.

7. The geared motor employing a planetary reducer and a servo motor according to claim 1, characterized in that: The servo motor is mounted on the outside of the housing and cooperates with the housing to form a planetary reducer mounting cavity, with the ring gear and planetary gears set inside the planetary reducer mounting cavity.

8. The geared motor employing a planetary reducer and a servo motor according to claim 1, characterized in that: The planetary reducer has straight or helical tooth profiles.

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