A DC geared motor with a reducer centrally arranged

Abstract

The present invention discloses a DC reduction motor with a reducer centrally arranged, which includes a hub body. The surface of the hub body is fixedly connected to a hub end cover through bolts. The surface of the hub end cover is rotatably connected to an input end stator bracket through a bearing. The inner cavity of the input end stator bracket is connected to an input end fixed shaft through interference fit. The inner cavity of the input end stator bracket is connected to a stator coil through key connection. The surface of the hub body is rotatably connected to an output end stator bracket through a bearing. Through the cooperation of the input end fixed shaft, the output end fixed shaft, the hub end cover, the input end stator bracket, the hub body, the stator coil, the rotor assembly, the output end stator bracket, and the hollow reducer, in the form of the reducer being inside the rotor, a large amount of axial space is saved to increase the length of the motor stator and rotor, further improving the performance of the motor and increasing the utilization rate of the internal space of the motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of speed reduction motors, and particularly relates to a DC speed reduction motor with a reducer centrally arranged. Background Art

[0002] With the continuous development of our country and the advent of the information age, people's demands in various fields are constantly increasing, and there should be a substantial improvement in the quality of life and efficiency. Whether in the industrial field or in daily life, the demand for intelligence is gradually increasing. In the field of intelligence, transmission devices are indispensable. Therefore, the application of speed reduction motors is becoming more and more extensive. A DC speed reduction motor is based on an ordinary DC motor and is additionally equipped with a matching gear speed reduction device. The installation of the gear speed reduction device mainly reduces the speed of the reducer to increase the torque. A DC speed reduction motor can achieve relatively precise control of both speed and torque, and can also be customized in size and power according to different requirements. Therefore, the DC speed reduction motor has a high usage rate in the automation industry. The DC speed reduction motor is also widely used in fields such as smart home, smart kitchen and bathroom, automotive transmission, industrial intelligent transmission, office automation, mechanical transmission, and personal care. On the other hand, with the continuous development of industrial technology and the artificial intelligence + Internet model, it is an irresistible trend for robots to gradually replace humans in heavy work. In the development process of robots, the transmission part is particularly important. For example, the joint transmission of robots. Robot joints are the basic components of robots, and the quality of their performance directly affects the performance of robots. The robot transmission system requires a small gap, high stiffness, high output torque, and a large reduction ratio in the transmission system. Therefore, a large part of the transmission method selects the form of a motor combined with a reducer for transmission. In the process of the cooperation between the motor and the reducer, it is particularly important to have higher performance based on a limited mass and volume. The decisive factors mainly include the performance of the reducer and the motor itself, and their connection form. In terms of robot transmission, the requirements for the motor are small volume, small mass, and short axial dimension, etc. Now the development of motors has been quite mature, so the room for improvement in a fixed volume size is not very large. Therefore, it is particularly important to have a more compact speed reduction motor structure.

[0003] However, the reducer and the motor rotor in a traditional speed reduction motor are connected in series, which increases the axial space, resulting in a short length of the stator and the rotor, and low utilization rate of the internal space of the motor. Summary of the Invention

[0004] The purpose of the present invention is to provide a DC speed reduction motor with a reducer centrally arranged, adopting the form that the reducer is inside the rotor, which saves a large amount of axial space to a great extent. The saved space is used to increase the length of the motor stator and rotor, and can further improve the performance of the motor and increase the utilization rate of the internal space of the motor, so as to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A DC reduction motor with a reducer centrally arranged, comprising a hub body, the surface of the hub body is fixedly connected to a hub end cover through bolts, the surface of the hub end cover is rotatably connected to an input end stator bracket through a bearing, the inner cavity of the input end stator bracket is connected to an input end fixed shaft through interference fit, the inner cavity of the input end stator bracket is connected to a stator coil through a key connection, the surface of the hub body is rotatably connected to an output end stator bracket through a bearing, both opposite sides of the input end fixed shaft and the output end fixed shaft are rotatably connected to a hollow reducer through bearings, a spline input end is integrally formed on the outer side of the hollow reducer, the surface of the spline input end is engaged with a rotor assembly and fixed by a shaft retaining ring, a spline output end is integrally formed on the outer side of the hollow reducer, and the surface of the spline output end is key-connected to the spline of the hub body.

[0007] Preferably, the other side of the rotor assembly is rotatably connected to the surface of the hollow reducer through a bearing.

[0008] Preferably, the output end stator bracket is sleeved on the surface of the stator coil.

[0009] Preferably, the hub body and the output end fixed shaft are rotatably connected through a bearing.

[0010] The technical effects and advantages of the present invention: A DC reduction motor with a reducer centrally arranged proposed by the present invention, compared with the prior art, has the following advantages:

[0011] 1. Through the cooperation of the input end fixed shaft, the output end fixed shaft, the hub end cover, the input end stator bracket, the hub body, the stator coil, the rotor assembly, the output end stator bracket, and the hollow reducer, adopting the form that the reducer is inside the rotor, a large amount of axial space is saved to a great extent. The saved space is used to increase the length of the motor stator and rotor, which can further improve the performance of the motor and increase the utilization rate of the internal space of the motor.

[0012] 2. The inner cavity of the input end stator bracket is fixedly connected to the input end fixed shaft through interference fit, so that there is no relative movement between the input end stator bracket and the input end fixed shaft during the working process. The opposite sides of the input end fixed shaft and the output end fixed shaft are rotatably connected to the hollow reducer through bearings to support the hollow reducer. The inner cavity of the input end stator bracket is connected to the stator coil through a key connection to fix the stator coil. The hub body and the output end fixed shaft are rotatably connected through a bearing to play a role in axial support and positioning of the hub body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 Explosion connection schematic diagram of the present invention.

[0015] In the figure: 1. Input end fixed shaft; 2. Output end fixed shaft; 3. Hub end cover; 4. Input end stator bracket; 5. Hub body; 6. Stator coil; 7. Rotor assembly; 8. Output end stator bracket; 9. Hollow reducer; 10. Spline input end; 11. Spline output end. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] The present invention provides a DC reduction motor with a reducer centrally arranged as shown in Figure 1 and 2 which includes a hub body 5. The surface of the hub body 5 is fixedly connected to the hub end cover 3 by bolts. The surface of the hub end cover 3 is rotatably connected to the input end stator bracket 4 through a bearing. The inner cavity of the input end stator bracket 4 is connected to the input end fixed shaft 1 by interference fit. The inner cavity of the input end stator bracket 4 is connected to the stator coil 6 by key connection. The surface of the hub body 5 is rotatably connected to the output end stator bracket 8 through a bearing. Both sides of the input end fixed shaft 1 and the output end fixed shaft 2 facing each other are rotatably connected to the hollow reducer 9 through bearings. A spline input end 10 is integrally formed on the outer side of the hollow reducer 9. The surface of the spline input end 10 meshes with the rotor assembly 7 and is fixed by a shaft retaining ring. A spline output end 11 is integrally formed on the outer side of the hollow reducer 9. The surface of the spline output end 11 is key-connected to the spline of the hub body 5. Through the cooperation of the input end fixed shaft 1, the output end fixed shaft 2, the hub end cover 3, the input end stator bracket 4, the hub body 5, the stator coil 6, the rotor assembly 7, the output end stator bracket 8, and the hollow reducer 9, adopting the form that the reducer is inside the rotor, a large amount of axial space is saved to increase the length of the motor stator and rotor, which can further improve the performance of the motor and increase the utilization rate of the internal space of the motor.

[0018] The inner cavity of the input end stator bracket 4 is fixedly connected to the input end fixed shaft 1 by interference fit, and the axial position is limited by the step surface on the input end fixed shaft 1. There is no relative movement between the two during the working process.

[0019] On one side facing each other, both the input end fixed shaft 1 and the output end fixed shaft 2 are rotatably connected with a hollow speed reducer 9 through bearings to support the hollow speed reducer 9.

[0020] A spline input end 10 is integrally formed on the outer side of the hollow speed reducer 9. The surface of the spline input end 10 meshes with a rotor assembly 7 and is fixed by a shaft snap ring. A spline output end 11 is integrally formed on the outer side of the hollow speed reducer 9. The surface of the spline output end 11 is spline-connected to the spline of the hub body 5 to achieve power transmission and conversion, and transmit the power from the hollow speed reducer 9 to the hub body 5.

[0021] The surface of the hub body 5 is rotatably connected with an output end stator bracket 8 through a bearing, which plays an axial supporting and positioning role for the output end stator bracket 8. The hub body 5 and the output end fixed shaft 2 are rotatably connected through a bearing, which plays an axial supporting and positioning role for the hub body 5.

[0022] The surface of the hub end cover 3 is rotatably connected with an input end stator bracket 4 through a bearing to achieve axial support. The hub end cover 3 is connected to the hub body 5 by bolts and sealed. During the working process, there is no relative movement between the two.

[0023] Working principle or structural principle: The stator coil 6 drives the rotor assembly 7 to rotate. The power passes through the spline input end 10, the hollow speed reducer 9, the spline output end 11 to the hub body 5. The motor decelerates to increase the torque and transmits it to the hub body 5, thereby realizing the power output of torque increase and speed reduction.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC geared motor with a reducer centrally arranged, comprising a hub body (5), characterized in that: The surface of the hub body (5) is fixedly connected to the hub end cover (3) by bolts. The surface of the hub end cover (3) is rotatably connected to the input end stator bracket (4) by bearings. The inner cavity of the input end stator bracket (4) is connected to the input end fixed shaft (1) by interference fit. The inner cavity of the input end stator bracket (4) is connected to the stator coil (6) by key connection. The surface of the hub body (5) is rotatably connected to the output end stator bracket (8) by bearings. Both the opposite sides of the input end fixed shaft (1) and the output end fixed shaft (2) are rotatably connected to the hollow speed reducer (9) by bearings. A spline input end (10) is integrally formed on the outer side of the hollow speed reducer (9). The surface of the spline input end (10) is engaged with the rotor assembly (7) and fixed by a shaft retaining ring. A spline output end (11) is integrally formed on the outer side of the hollow speed reducer (9). The surface of the spline output end (11) is spline-connected to the hub body (5).

2. The DC geared motor with a reducer centrally arranged according to claim 1, wherein: The other side of the rotor assembly (7) is rotatably connected to the surface of the hollow speed reducer (9) by a bearing.

3. The DC reduction motor with a reducer centrally arranged according to claim 1, characterized in that: The output end stator bracket (8) is sleeved on the surface of the stator coil (6).

4. A DC reduction motor with a reducer centrally arranged according to claim 1, characterized in that: The hub body (5) is rotatably connected to the output end fixed shaft (2) by a bearing.

Images