Servo motor with outer rotor structure

Abstract

The utility model provides a motor, belongs to the field of outer rotor motor equipment, and particularly relates to an outer rotor structure servo motor, which comprises an outer shell, a speed reduction structure is arranged in the outer shell, and an outer rotor magnetic pole structure arranged in the outer shell is connected below the speed reduction structure. The speed reduction structure comprises a speed reduction gear set arranged in the outer shell, the interior of the speed reduction gear set is connected with an inner stator magnetic pole through a connecting shaft, the exterior of the inner stator magnetic pole is connected with an outer rotor through evenly-distributed permanent magnet magnetic poles, and the problem that in the prior art, a common motor cannot start machinery equipment needing large starting torque is solved.

Description

Technical Field

[0001] The utility model provides a motor, belongs to the field of outer rotor motor equipment, and particularly relates to an outer rotor structure servo motor. Background Art

[0002] An outrunner motor is a motor design with the rotor part located outside the motor and the stator part inside. Outrunner motors usually consist of a stator fixed inside and a rotor rotating around the outside of the stator. In an outrunner motor, the rotor is responsible for generating the motion force while the stator is responsible for generating the magnetic field. Outrunner motors are widely used in many fields. Their simple structure, high efficiency and high output torque make them one of the ideal choices in various applications.

[0003] In an electric motor, when running at no load or light load, the mechanical rotation of the motor rotor will quickly reach the rated speed of the motor. However, when loaded with too large a load, the speed will decrease, and the torque will increase until the speed gradually approaches zero and the maximum torque value is reached. In some machines and equipment, due to inertia and other reasons, the required starting torque is very large. At this time, ordinary motors cannot be used to start, so it is necessary to use a motor with low speed and high torque characteristics to facilitate starting. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the embodiments of the present application provide a servo motor with an outer rotor structure, thereby solving the problem that ordinary electric motors in the prior art cannot start machinery and equipment that requires a large starting torque.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a servo motor with an outer rotor structure, comprising an outer shell, a reduction structure is provided inside the outer shell, an outer rotor magnetic pole structure arranged inside the outer shell is connected below the reduction structure, the reduction structure comprises a reduction gear set arranged inside the outer shell, the interior of the reduction gear set is connected to an inner stator magnetic pole via a connecting shaft, and the outside of the inner stator magnetic pole is connected to the outer rotor via evenly distributed permanent magnet magnetic poles.

[0006] Preferably, the outer sleeve of the reduction gear set is provided with an inner housing through which the connecting shaft penetrates, and the inner housing is provided with a support rod into which the connecting shaft is inserted.

[0007] Preferably, a driving shaft penetrating the inner shell and the outer shell is provided above the support rod, and a rotating shaft disposed inside the inner shell and penetrating the support rod is provided on one side of the driving shaft.

[0008] Preferably: the driving shaft is sleeved with a first gear, the rotating shaft is sleeved with a second gear which is at the same level as the first gear and meshes with it, the other section of the rotating shaft is sleeved with a third gear, one side of the third gear is provided with a fourth gear which is penetrated by the connecting shaft, and all the gear teeth in the reduction gear set are inclined gear teeth.

[0009] Preferably: the end of the connecting shaft away from the reduction structure is connected to a bearing mother component, a bearing sub-component corresponding to the bearing mother component is provided below the bearing mother component, a center bearing is connected below the bearing sub-component, and the center bearing passes through the inner stator pole.

[0010] Preferably: a plurality of electromagnetic rings corresponding to the inner stator poles are sleeved on the inner stator poles, the permanent magnet poles are fixedly connected to the outer rotor, a main shaft is provided in the outer rotor which runs through the main shaft and is fixedly connected to the central bearing, and the other end of the main shaft is connected to a connecting rod fixedly connected to the outer shell through a bearing base.

[0011] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0012] The utility model increases the torque of the outer rotor and reduces the rotation speed by means of a reduction gear set by arranging an outer rotor magnetic pole structure disposed inside the outer shell and a reduction structure connected thereto, so as to provide greater power.

[0013] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a servo motor with an outer rotor structure according to the utility model;

[0015] Figure 2 This is a cross-sectional view of a servo motor with an outer rotor structure according to the utility model;

[0016] Figure 3 This is a front view of a servo motor with an outer rotor structure according to the utility model;

[0017] Figure 4 The utility model discloses an exploded diagram of the outer rotor magnetic pole structure of an outer rotor structure servo motor.

[0018] As shown in the figure:

[0019] 1. Outer shell;

[0020] 2. Speed ​​reduction structure;

[0021] 21. reduction gear set; 22. connecting shaft; 23. inner housing; 24. support rod; 25. drive shaft; 26. rotating shaft; 27. bearing mother part;

[0022] 211, first gear; 212, second gear; 213, third gear; 214, fourth gear;

[0023] 3. Outer rotor magnetic pole structure;

[0024] 31. Inner stator pole; 32. Permanent magnet pole; 33. Outer rotor; 34. Bearing sub-assembly; 35. Center bearing; 36. Electromagnetic ring; 37. Main shaft; 38. Bearing base; 39. Connecting rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 1 and Figure 2As shown, the utility model provides an outer rotor structure servo motor, including an outer shell 1, a reduction structure 2 is provided inside the outer shell 1, an inner shell 23 is sleeved on the outside of the reduction gear group 21 and penetrated by a connecting shaft 22, a support rod 24 is provided inside the inner shell 23 and inserted by the connecting shaft, a driving shaft 25 is provided above the support rod 24 and penetrates the inner shell 23 and the outer shell 1, a rotating shaft 26 is provided on one side of the driving shaft 25 and is arranged inside the inner shell 23 and penetrates the support rod 24, an outer rotor pole structure 3 arranged inside the outer shell 1 is connected to the lower part of the reduction structure 2, the reduction structure 2 includes a reduction gear group 21 arranged inside the outer shell 1, the interior of the reduction gear group 21 is connected to an inner stator pole 31 through a connecting shaft 22, and the outside of the inner stator pole 31 is connected to an outer rotor 33 through evenly distributed permanent magnet poles 32.

[0029] In this embodiment, by providing an outer rotor pole structure 3 placed inside the outer shell 1 and a reduction structure 2 connected thereto, the torque of the outer rotor 33 is increased and the rotation speed is reduced by means of a reduction gear set 21, so as to provide greater power.

[0030] like Figure 3 and Figure 4 As shown, a first gear 211 is sleeved on the driving shaft 25, a second gear 212 is sleeved on the rotating shaft 26 at the same horizontal height as the first gear 211 and meshed with it, a third gear 213 is sleeved on another section of the rotating shaft 26, a fourth gear 214 penetrated by the connecting shaft 22 is provided on one side of the third gear 213, all the gear teeth in the reduction gear set 21 are inclined gear teeth, a bearing mother component 27 is connected to the end of the connecting shaft 22 away from the reduction structure 2, a bearing sub-component 34 corresponding to the bearing mother component 27 is provided below the bearing mother component 27, a center bearing 35 is connected below the bearing sub-component 34, the center bearing 35 penetrates the inner stator pole 31, a plurality of electromagnetic rings 36 corresponding to the inner stator pole 31 are sleeved on the inner stator pole 31, the permanent magnet pole 32 is fixedly connected to the outer rotor 33, a main shaft 37 penetrating through the outer rotor 33 and fixedly connected to the center bearing 35 is provided inside the outer rotor 33, and the other end of the main shaft 37 is connected to a connecting rod 39 fixedly connected to the outer shell 1 through a bearing base 38.

[0031] In this embodiment, the first gear 211 and the fourth gear 214 are located on the same vertical line. When both rotate independently, the first gear 211 drives the driving shaft 25, and the fourth gear 214 drives the connecting shaft 22. The transmission effect is achieved by the linked rotating second gear 212 and the third gear 213. After the outer rotor 33 is rotated by the electromagnetic ring 36 and the permanent magnet pole 32 on the inner stator pole 31, the rotation speed transmitted through the bearing mother component 27 and the bearing sub-component 34 is reduced, thereby increasing the torque.

[0032] When in use, after starting the motor device, the reduction structure 2 inside the outer shell 1 starts to work, and the outer rotor magnetic pole structure 3 interacts with the reduction gear set 21; the outer rotor torque increases: the reduction gear set 21 increases the torque of the outer rotor 33 through the connecting shaft 22, and reduces the speed of the outer rotor to provide greater power output; gear transmission: the first gear 211 on the drive shaft 25 drives the rotating shaft 26, and the rotating shaft 26 realizes the transmission effect through the linkage of the second gear 212 and the third gear 213, and finally drives the fourth gear 214 and the connecting shaft 22; torque transmission: after the outer rotor 33 is rotated by the electromagnetic ring 36 and the permanent magnet magnetic pole 32 on the inner stator magnetic pole 31, the rotation speed transmitted through the bearing mother part 27 and the bearing sub-part 34 is reduced, thereby increasing the torque; complete speed reduction: the entire transmission system realizes the function of reducing the speed and increasing the torque of the outer rotor structure servo motor, and finally improves the output power. Through the above steps, the outer rotor structure servo motor of the utility model can effectively provide greater power output, and is suitable for applications requiring low speed and high torque.

[0033] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A servo motor with an outer rotor structure, comprising an outer shell (1), characterized in that: The outer shell (1) is provided with a reduction structure (2) inside, and an outer rotor magnetic pole structure (3) arranged inside the outer shell (1) is connected below the reduction structure (2). The reduction structure (2) comprises a reduction gear set (21) arranged inside the outer shell (1), the interior of the reduction gear set (21) is connected to an inner stator magnetic pole (31) via a connecting shaft (22), and the exterior of the inner stator magnetic pole (31) is connected to an outer rotor (33) via evenly distributed permanent magnet magnetic poles (32).

2. The servo motor with an outer rotor structure according to claim 1, characterized in that: The outer sleeve of the reduction gear set (21) is provided with an inner housing (23) penetrated by a connecting shaft (22), and the inner portion of the inner housing (23) is provided with a supporting rod (24) inserted by the connecting shaft.

3. The servo motor with an outer rotor structure according to claim 2, characterized in that: A driving shaft (25) penetrating the inner shell (23) and the outer shell (1) is provided above the support rod (24); a rotating shaft (26) disposed inside the inner shell (23) and penetrating the support rod (24) is provided on one side of the driving shaft (25).

4. The outer rotor structure servo motor according to claim 3, characterized in that: The driving shaft (25) is sleeved with a first gear (211), the rotating shaft (26) is sleeved with a second gear (212) which is at the same level as the first gear (211) and meshes with the first gear (211), the other end of the rotating shaft (26) is sleeved with a third gear (213), one side of the third gear (213) is provided with a fourth gear (214) which is penetrated by the connecting shaft (22), and all the gear teeth in the reduction gear set (21) are inclined gear teeth.

5. The outer rotor structure servo motor according to claim 1, characterized in that: One end of the connecting shaft (22) away from the deceleration structure (2) is connected to a bearing mother component (27), a bearing sub-component (34) corresponding to the bearing mother component (27) is provided below the bearing mother component (27), a central bearing (35) is connected below the bearing sub-component (34), and the central bearing (35) passes through the inner stator magnetic pole (31).

6. The outer rotor structure servo motor according to claim 5, characterized in that: The inner stator magnetic pole (31) is sleeved with a plurality of electromagnetic rings (36) corresponding to the inner stator magnetic pole (31), the permanent magnet magnetic pole (32) and the outer rotor (33) are fixedly connected, the outer rotor (33) is provided with a main shaft (37) penetrating the main shaft and fixedly connected to the center bearing (35), and the other end of the main shaft (37) is connected to a connecting rod (39) fixedly connected to the outer shell (1) through a bearing base (38).

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