Motor and driving device

Abstract

The utility model provides a motor and a driving device, the motor comprises a rotor, a stator and an output shaft, the stator is sleeved on the outer side of the rotor, the rotor is sleeved on the outer side of the output shaft, the output shaft rotates along with the rotor, the output shaft is provided with a hollow cavity, the motor also comprises a transmission nut, and the transmission nut is sleeved on the rotor. The transmission nut partially extends into the hollow cavity and is fixedly connected with the output shaft, the hollow cavity comprises a first part facing the transmission nut and a second part back on to the transmission nut, and the inner diameter of the first part is larger than that of the second part. A step part is arranged at the joint of the first part and the second part, and the step part is configured to abut against the transmission nut. The inner diameter of the first part of the hollow cavity is large, the first part can be used for installing or containing a large transmission nut so as to meet the requirement for high torque or high-speed transmission, meanwhile, power is directly output outwards through the transmission nut, and the response speed is higher.

Description

Technical Field

[0001] The utility model relates to a motor and a driving device, belonging to the field of mechanical transmission. Background Art

[0002] In traditional motors, the motor shaft and the power shaft are often connected by a coupling so that they rotate together to transmit torque. At the same time, there are some problems, such as the limited torque transmission capacity of the coupling, the large size, the large space occupied, the limited torque transmission capacity of the coupling, and the inability to transmit excessive torque. At the same time, it will also cause power output delays and slow response speeds. In addition, in existing motors, the structure of the motor shaft cannot support the output of large torques.

[0003] In view of this, it is necessary to improve the existing motor structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a motor with faster response.

[0005] To achieve the above-mentioned purpose, the utility model provides a motor, which is applied to a driving device, including a rotor, a stator and an output shaft, wherein the stator is sleeved on the outside of the rotor, the rotor is sleeved on the outside of the output shaft, the output shaft rotates with the rotor, and the output shaft is provided with a hollow cavity. The motor also includes a transmission nut, the transmission nut partially extends into the hollow cavity and is fixedly connected to the output shaft, the hollow cavity includes a first part facing the transmission nut and a second part facing away from the transmission nut, the inner diameter of the first part is larger than the inner diameter of the second part, and a step portion is provided at the connection between the first part and the second part, and the step portion is configured to abut against the transmission nut.

[0006] As a further improvement of the present invention, the output shaft further includes a first end connected to the transmission nut, and a second end facing away from the transmission nut, and the outer diameter of the output shaft gradually decreases from the first end to the second end.

[0007] As a further improvement of the present invention, an accommodating portion is provided on the outer wall of the output shaft, the accommodating portion includes a plurality of grooves, the grooves are evenly distributed along the circumference of the output shaft, the rotor includes a plurality of magnetic poles, the number of the magnetic poles is the same as the number of the grooves, and the magnetic poles are embedded in the grooves.

[0008] As a further improvement of the present invention, the axis of the transmission nut coincides with the axis of the output shaft.

[0009] As a further improvement of the present invention, the motor further comprises a housing, and the housing is sleeved outside the output shaft.

[0010] As a further improvement of the present invention, at least one bearing is provided on both sides of the rotor, the bearing is sleeved on the output shaft, and a side of the bearing facing away from the output shaft abuts against the motor housing.

[0011] As a further improvement of the present invention, an oil seal is sleeved on the second end of the output shaft, a side of the oil seal facing away from the output shaft is in contact with the housing, and the oil seal is configured to seal the motor.

[0012] As a further improvement of the present invention, the motor further includes an encoder, which is sleeved outside the output shaft and configured to calculate the moving position of the motor in the driving device.

[0013] As a further improvement of the present invention, the motor further comprises a mounting plate, the mounting plate is sleeved on the outside of the output shaft and the transmission nut, and the motor is connected to the driving device via the mounting plate.

[0014] Another object of the present invention is to provide a driving device including the above motor.

[0015] In order to achieve the above object, the utility model provides a driving device, including the above motor.

[0016] The beneficial effects of the utility model are as follows: compared with the prior art, the motor of the utility model reduces the intermediate links by directly extending the transmission nut into the hollow cavity of the output shaft, and the output shaft directly outputs power to the outside through the transmission nut, with a faster response speed and a greater torque transmitted. At the same time, the inner diameter of the first part of the hollow cavity of the output shaft is relatively large, which can be used to install or accommodate larger transmission parts or bearings to meet the needs of high torque or high-speed transmission. The design of the step portion can increase the structural strength of the output shaft at the connection and prevent fracture or deformation caused by stress concentration during the transmission process. The step portion is configured to abut against the transmission nut, which can ensure the precise positioning of the transmission nut during the assembly process to avoid dislocation or offset. The step portion can also serve as a stop surface for the transmission nut to prevent the transmission nut from axial movement during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of a motor according to an embodiment of the utility model.

[0018] Figure 2 yes Figure 1 A cross-sectional view of the motor shown.

[0019] Figure 3 yes Figure 2 Three-dimensional structural diagram of the output shaft.

[0020] Figure 4 yes Figure 3 A cross-sectional view of the output shaft is shown.

[0021] Figure 5 yes Figure 1 A cross-sectional view of the motor from another angle is shown.

[0022] Description of reference numerals:

[0023] 100-motor, 110-rotor, 111-pole, 120-stator, 130-transmission nut, 140-housing, 150-bearing, 160-oil seal, 170-encoder, 180-mounting plate;

[0024] 200 - output shaft, 210 - hollow cavity, 211 - first portion, 212 - second portion, 213 - step portion, 220 - first end, 230 - second end, 240 - accommodation portion, 241 - groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0027] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0028] The utility model provides a driving device, which includes a motor 100. Figures 1 to 5 As shown, a motor 100 in a specific embodiment of the present invention is shown.

[0029] The motor 100 includes a rotor 110, a stator 120 and an output shaft 200. The stator 120 is sleeved on the outside of the rotor 110, and the rotor 110 is sleeved on the outside of the output shaft 200. The motor 100 also includes a transmission nut 130. The transmission nut 130 partially extends into the hollow cavity 210 and is fixedly connected to the output shaft 200. The hollow cavity 210 includes a first portion 211 facing the transmission nut 130 and a second portion 212 facing away from the transmission nut 130. The inner diameter of the first portion 211 is greater than the inner diameter of the second portion 212. A step portion 213 is provided at the connection between the first portion 211 and the second portion 212. The step portion 213 is configured to abut against the transmission nut 130. In the motor 100 of the present embodiment, the transmission nut 130 directly extends into the hollow cavity 210 of the output shaft 200, reducing the intermediate links, and the output shaft 200 directly outputs power to the outside through the transmission nut 130, with a faster response speed and a larger torque transmitted. At the same time, the first part 211 of the hollow cavity 210 of the output shaft 200 has a larger inner diameter, which can be used to install or accommodate a larger transmission member or bearing 150 to meet the needs of high torque or high-speed transmission. The design of the step portion 213 can increase the structural strength of the output shaft 200 at the connection and prevent fracture or deformation caused by stress concentration during the transmission process. The step portion 213 is configured to abut against the transmission nut 130, which can ensure the precise positioning of the transmission nut 130 during the assembly process to avoid dislocation or offset. The step portion 213 can also serve as a stop surface of the transmission nut 130 to prevent the transmission nut 130 from axial movement during rotation.

[0030] The outer wall of the output shaft 200 is provided with a receiving portion 240, and the receiving portion 240 includes a plurality of grooves 241, and the grooves 241 are evenly distributed along the circumference of the output shaft 200. The rotor 110 includes a plurality of magnetic poles 111, and the number of the magnetic poles 111 is the same as the number of the grooves 241. The magnetic poles 111 are embedded in the grooves 241. The output shaft 200 can rotate with the rotor 110, and the output shaft 200 includes a hollow cavity 210. The magnetic poles 111 on the rotor 110 are embedded in the grooves 241 on the outer wall of the output shaft 200. This design makes the connection between the rotor 110 and the output shaft 200 tighter, reduces the gap and friction caused by the transmission, and therefore, the transmission of the equipment is smoother during operation, reduces noise and vibration, and improves the operating efficiency and stability of the equipment. The rotor 110 is sleeved outside the output shaft 200, and does not require additional splines or other connectors, which can reduce the steps of processing and assembly, and also reduce the weight of the output shaft 200. Since the design of the hollow cavity 210 can reduce the mass of the output shaft 200, its inertia is also reduced, which is very important for applications that require rapid start, stop or frequent changes in speed, because reducing inertia can reduce the start and stop time and improve the response speed of the device. The hollow cavity 210 in the output shaft 200 serves as a channel for the screw rod of the drive device to pass through so as to be connected to the screw rod for transmission, eliminating the coupling and achieving higher transmission efficiency.

[0031] Furthermore, the motor 100 also includes a housing 140, which is sleeved outside the output shaft 200. The housing 140 protects the internal structure of the motor 100. At least one bearing 150 is provided on both sides of the rotor 110, and the bearing 150 is sleeved on the output shaft 200, and the side of the bearing 150 facing away from the output shaft 200 abuts against the motor 100 shell. As a supporting component of the output shaft 200, the bearing 150 can withstand axial and radial loads, ensure that the output shaft 200 and the rotor 110 rotate stably and balanced during operation, can effectively share the load of the rotor 110, and ensure that the movement of the rotor 110 is stable. The setting of the bearing 150 can effectively protect the rotor 110 and the output shaft 200 from external impact and vibration. The bearing 150 can absorb and disperse the impact force generated when the rotor 110 is running, reduce damage to the rotor 110 and the hollow output shaft 200, and extend the service life of the motor 100.

[0032] Furthermore, the motor 100 also includes an encoder 170, which is sleeved outside the output shaft 200, and the encoder 170 is configured to calculate the motion position of the motor 100 in the drive device. The encoder 170 can record the number of rotations of the motor 100, that is, obtain the position of the motor 100 in the drive device, and the control system can track and adjust the motion trajectory according to the real-time position information. This is very useful for applications that require complex motion trajectories, and can ensure that the motor 100 moves along a predetermined path to achieve precise motion control.

[0033] Furthermore, the output shaft 200 includes a first end 220 connected to the transmission nut 130, and a second end 230 facing away from the transmission nut 130, and the outer diameter of the output shaft 200 gradually decreases from the first end 220 to the second end 230. Directly fixing the transmission nut 130 portion on the first end 220 of the output shaft 200 can simplify the assembly process and reduce the number of parts and assembly steps. In addition, the gradually decreasing outer diameter of the output shaft 200 from the first end 220 to the second end 230 also helps to reduce maintenance costs, because the operation of replacing or adjusting the output shaft 200 is simpler. At the same time, the mass and inertia of the output shaft 200 can also be reduced, thereby improving the response speed and control performance of the equipment. This is particularly important for applications that require frequent starts and stops or adjustment of the speed.

[0034] Furthermore, an oil seal 160 is sleeved on the second end 230 of the output shaft 200, and the side of the oil seal 160 facing away from the output shaft 200 abuts against the housing 140, and the oil seal 160 is configured to seal the motor 100. The oil seal 160 is configured to seal the motor 100. By sealing the motor 100 with the oil seal 160, the failure and damage of the motor 100 caused by the leakage of lubricating oil or the entry of external impurities can be reduced. This helps to reduce the maintenance cost and replacement frequency of the motor 100, and improves the reliability and operation stability of the equipment. At the same time, it also improves the sealing performance of the motor 100, prevents the splashing or spraying of liquid generated by the lubricating oil when rotating at high speed, keeps the inside of the motor 100 clean and dry, and enables the motor 100 to adapt to a more severe working environment.

[0035] Furthermore, the axis of the transmission nut 130 coincides with the axis of the output shaft 200 . The precise axis alignment of the transmission nut 130 and the output shaft 200 helps to reduce friction and loss during operation of the motor 100 , thereby improving the operating efficiency and life of the equipment.

[0036] Furthermore, the motor 100 also includes a mounting plate 180, which is mounted on the first end 220, and is sleeved on the outside of the output shaft 200 and the drive nut 130. The mounting plate 180 is configured to quickly connect and install the motor 100 and the drive device.

[0037] In summary, the motor 100 in the utility model reduces the intermediate links by directly extending the transmission nut 130 into the hollow cavity 210 of the output shaft 200. The output shaft 200 directly outputs power to the outside through the transmission nut 130, and the response speed is faster and the torque transmitted is larger. At the same time, the inner diameter of the first part 211 of the hollow cavity 210 of the output shaft 200 is larger, which can be used to install or accommodate larger transmission parts or bearings 150 to meet the needs of high torque or high-speed transmission. The design of the step portion 213 can increase the structural strength of the output shaft 200 at the connection and prevent fracture or deformation caused by stress concentration during the transmission process. The step portion 213 is configured to abut against the transmission nut 130, which can ensure the precise positioning of the transmission nut 130 during the assembly process to avoid dislocation or offset. The step portion 213 can also serve as a stop surface of the transmission nut 130 to prevent the transmission nut 130 from axial movement during rotation.

[0038] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A motor, used in a driving device, characterized in that: The motor comprises a rotor (110), a stator (120) and an output shaft (200), wherein the stator (120) is sleeved on the outside of the rotor (110), the rotor (110) is sleeved on the outside of the output shaft (200), the output shaft (200) rotates with the rotor (110), the output shaft (200) comprises a hollow cavity (210), and the motor further comprises a transmission nut (130), a portion of the transmission nut (130) extends into the hollow cavity (210) and is in contact with the The output shaft (200) is fixedly connected, and the hollow cavity (210) includes a first portion (211) facing the transmission nut (130) and a second portion (212) facing away from the transmission nut (130), the inner diameter of the first portion (211) is larger than the inner diameter of the second portion (212), and a step portion (213) is provided at the connection between the first portion (211) and the second portion (212), and the step portion (213) is configured to abut against the transmission nut (130).

2. The motor according to claim 1, characterized in that The output shaft (200) further comprises a first end (220) connected to the transmission nut (130), and a second end (230) facing away from the transmission nut (130), and an outer diameter of the output shaft (200) gradually decreases from the first end (220) to the second end (230).

3. The motor according to claim 1, characterized in that An accommodating portion (240) is provided on the outer wall of the output shaft (200), the accommodating portion (240) comprises a plurality of grooves (241), the grooves (241) are evenly distributed along the circumference of the output shaft (200), the rotor (110) comprises a plurality of magnetic poles (111), the number of the magnetic poles (111) is the same as the number of the grooves (241), and the magnetic poles (111) are embedded in the grooves (241).

4. The motor according to claim 1, characterized in that The axis of the transmission nut (130) coincides with the axis of the output shaft (200).

5. The motor according to claim 2, characterized in that: The motor further comprises a housing (140), wherein the housing (140) is sleeved outside the output shaft (200).

6. The motor according to claim 5, characterized in that At least one bearing (150) is provided on both sides of the rotor (110); the bearing (150) is sleeved on the output shaft (200); and a surface of the bearing (150) facing away from the output shaft (200) abuts against the housing (140).

7. The motor according to claim 5, characterized in that An oil seal (160) is sleeved on the second end (230) of the output shaft (200), and a surface of the oil seal (160) facing away from the output shaft (200) is in contact with the housing (140). The oil seal (160) is configured to seal the motor.

8. The motor according to claim 1, characterized in that The motor further comprises an encoder (170), wherein the encoder (170) is sleeved outside the output shaft (200), and the encoder (170) is configured to calculate the movement position of the motor in the driving device.

9. The motor according to claim 1, characterized in that The motor further comprises a mounting plate (180), wherein the mounting plate (180) is sleeved on the outside of the output shaft (200) and the transmission nut (130), and the motor is connected to the driving device via the mounting plate (180).

10. A driving device, characterized in that: A motor comprising any one of claims 1 to 9.

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