A rotor structure, an electric motor

Abstract

This utility model provides a rotor structure and a motor. The rotor structure includes a bushing assembly, in which a rotating shaft is fitted inside and a rotor core is fitted outside. The bushing assembly includes a first bushing and a second bushing, which are detachably connected along the axial direction of the bushing assembly. According to this utility model, the technical problems of fixed-length rotor bushings in the prior art, which cannot adapt to different electronic requirements and have poor versatility, can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a rotor structure and a motor. Background Technology

[0002] High-speed motors typically use magnetic or air bearings to suspend the rotor, making it levitate in the air. This results in zero mechanical friction during operation, effectively reducing losses and heat generation. Furthermore, it offers advantages such as no lubrication required and no oil pollution, significantly increasing the motor's critical speed and extending its lifespan. High-speed motor rotors are currently divided into surface-mounted and internal types, representing the main research direction. This patent proposal primarily focuses on internal high-speed motor rotors.

[0003] When existing built-in high-speed motor rotors are applied to customers, customers use the same motor rotor shaft, housing, end caps, and other materials to create multiple motors with different power ranges to improve versatility. The motor stator can be universally modified by changing the stacking height and winding method. However, the motor rotor requires each motor to have a rotor bushing of different length to adapt to the rotor length requirements of motors with different power ranges. This results in low bushing versatility, high procurement costs, long lead times, and difficulty in quickly responding to customer orders.

[0004] Because the rotor bushings in the existing technology are of fixed length, they cannot be adapted to different electronic requirements and have poor versatility. Therefore, this utility model studies and designs a rotor structure and a motor. Utility Model Content

[0005] Therefore, this utility model provides a rotor structure and motor that can solve the technical problems in the prior art, such as the rotor bushing having a fixed length, which cannot adapt to different electronic requirements and has poor versatility.

[0006] To solve the above problems, this utility model provides a rotor structure, including: a bushing assembly, in which a rotating shaft is fitted inside the bushing assembly, and a rotor core is fitted outside the bushing assembly;

[0007] The bushing assembly includes a first bushing and a second bushing, which are detachably connected along the axial direction of the bushing assembly.

[0008] In some embodiments, the first bushing has a first end and a second end, the first end is provided with a second groove, the second groove penetrates the outer wall of the first bushing, the second groove is annular, one end of the second bushing is provided with a third groove, the third groove penetrates the inner wall of the second bushing, the second groove and the third groove extend circumferentially along the shaft and radially along the first bushing, and the sidewall of the third groove is threadedly connected to the sidewall of the second groove.

[0009] In some embodiments, the sum of the width of the third groove and the width of the second groove along the radial direction of the first bushing is equal to the wall thickness of the first bushing, and the first bushing and the second bushing have the same wall thickness.

[0010] In some embodiments, a first fixing hole is provided on the side wall of the third groove, the first fixing hole penetrates the side wall of the third groove and is at least partially located inside the side wall of the second groove, and a first fixing member is provided inside the first fixing hole.

[0011] In some embodiments, a fourth groove is provided on the outer wall of the bushing assembly, and the fourth groove penetrates the bushing assembly along the axial direction of the bushing assembly. A third protrusion is provided on the inner wall of the rotor core, and the third protrusion matches the fourth groove. The first fixing hole is located at the bottom of the fourth groove.

[0012] In some embodiments, a fifth groove is provided on the inner wall of the bushing assembly, the fifth groove extending through the bushing assembly along the axial direction of the bushing assembly, and a second protrusion is provided on the rotating shaft, the second protrusion matching the fifth groove.

[0013] In some embodiments, the second end is provided with a first protrusion, the first protrusion extends circumferentially along the first bushing and extends radially outward along the first bushing, the outer diameter of the first protrusion is larger than the inner diameter of the rotor core, and a baffle is provided between the first protrusion and the end of the rotor core.

[0014] In some embodiments, a first groove is provided at the other end of the second bushing. The first groove penetrates the outer peripheral wall of the second bushing and extends circumferentially along the second bushing. A nut is connected to the side wall of the first groove along the radial direction of the second bushing, and a baffle is provided between the nut and the end of the rotor core.

[0015] In some embodiments, a second fixing hole is provided on the side wall of the first groove along the radial direction of the second bushing, and a second fixing member is provided on the nut, the second fixing member passing through the nut and connected in the second fixing hole.

[0016] This utility model also provides an electric motor, which includes the aforementioned rotor structure.

[0017] The rotor structure and motor provided by this utility model have the following beneficial effects:

[0018] The detachable connection between the first and second bushings solves the problems of low versatility, high procurement costs, long cycles, and slow customer order response for high-speed rotors of different lengths with multiple power ranges. At the same time, it allows for batch preparation of materials and rapid assembly of motor rotors of different lengths according to the magnets and the customer's required power range, ensuring that the rotor dynamic performance is met while improving versatility, reducing costs, and ensuring fast delivery. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is an assembly structure diagram of the first bushing and the second bushing in the rotor structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the rotor structure of this utility model. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the rotor structure of this utility model. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the rotor structure of this utility model. Figure 3 ;

[0024] Figure 5 This is a schematic diagram of the rotor structure of this utility model. Figure 4 ;

[0025] Figure 6 This is a schematic diagram of the rotor structure of this utility model. Figure 3 .

[0026] The attached figures are labeled as follows:

[0027] 1. First bushing; 2. Second bushing; 3. First fixing hole; 4. Rotor core; 5. Baffle; 6. Magnet; 7. Second protrusion; 8. Nut; 9. Third fixing hole; 10. Second fixing hole; 11. First groove; 12. First protrusion; 13. Third protrusion; A. Threaded fit. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0030] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0032] See also Figure 1-6As shown, according to an embodiment of the present invention, a rotor structure is provided, including: a bushing assembly, wherein a rotating shaft is sleeved inside the bushing assembly, and a rotor core 4 is sleeved outside the bushing assembly;

[0033] The bushing assembly includes a first bushing 1 and a second bushing 2, which are detachably connected along the axial direction of the bushing assembly.

[0034] In this technical solution, the first bushing 1 and the second bushing 2 are detachably connected, which solves the problems of low versatility, high procurement cost, long cycle and slow customer order response of high-speed rotors of different lengths with multiple power ranges. At the same time, it can prepare materials in batches and quickly assemble motor rotors of different lengths according to the magnets and the motor requirements of the customer's required power range. This ensures that the rotor dynamic performance is met, improves versatility, reduces costs and ensures fast delivery.

[0035] In some embodiments, the rotor core 4 is made of stacked silicon steel sheets. A third fixing hole 9 is provided on the rotor core 4 along its axial direction, allowing a positioning pin to be inserted into the third fixing hole 9 to position and fix the stacked silicon steel sheets. This prevents the silicon steel sheets from shifting when the magnet is inserted and the locking nut 8 is tightened.

[0036] In some embodiments, the first bushing 1 has a first end and a second end, the first end is provided with a second groove, the second groove penetrates the outer wall of the first bushing 1, the second groove is annular, one end of the second bushing 2 is provided with a third groove, the third groove penetrates the inner wall of the second bushing 2, the second groove and the third groove extend circumferentially along the shaft and radially along the first bushing 1, the sidewall of the third groove is threadedly connected to the sidewall of the second groove.

[0037] In this technical solution, the sidewall of the third groove is threadedly connected to the sidewall of the second groove, see [reference needed]. Figure 6 The threaded fit A shown allows the first bushing 1 and the second bushing 2 to be connected by threads, improving the disassembly efficiency of the first bushing 1 and the second bushing 2. When different bushing lengths are required, only the length of the second bushing 2 needs to be adjusted, and then the first bushing 1 and the second bushing 2 are threaded together. The entire rotor achieves material standardization and universality, and can meet different rotor length requirements for different power ranges according to customer needs.

[0038] In some embodiments, the sum of the width of the third groove and the width of the second groove along the radial direction of the first bushing 1 is equal to the wall thickness of the first bushing 1, and the first bushing 1 and the second bushing 2 have the same wall thickness.

[0039] In this technical solution, the first bushing 1 and the second bushing 2 are compatible and are used to connect with the extension of the second bushing 2 or multiple second bushings 2 to realize the lengthening of the overall bushing and achieve the formation of the entire rotor structure.

[0040] In some embodiments, a first fixing hole 3 is provided on the side wall of the third groove. The first fixing hole 3 penetrates the side wall of the third groove and is at least partially located inside the side wall of the second groove. A first fixing member is provided inside the first fixing hole 3.

[0041] In this technical solution, the first fixing hole 3 can be a pin hole, and the first fixing member can be a pin. The stability of the connection between the first bushing 1 and the second bushing 2 is ensured by the cooperation of the pin and the pin hole.

[0042] In some embodiments, a fourth groove is provided on the outer wall of the bushing assembly, and the fourth groove penetrates the bushing assembly along the axial direction of the bushing assembly. A third protrusion 13 is provided on the inner wall of the rotor core 4, and the third protrusion 13 matches the fourth groove. The first fixing hole 3 is located at the bottom of the fourth groove.

[0043] In this technical solution, the third protrusion 13 matches the fourth groove to circumferentially limit the bushing assembly and the rotor core 4, thereby improving the stability between the bushing assembly and the rotor core 4. The first fixing hole 3 is located at the bottom of the fourth groove, which allows the pin to be hidden and also avoids the problem of the pin falling off during motor operation.

[0044] In some embodiments, a fifth groove is provided on the inner wall of the bushing assembly, and the fifth groove extends through the bushing assembly along the axial direction of the bushing assembly. A second protrusion 7 is provided on the rotating shaft, and the second protrusion 7 matches the fifth groove.

[0045] In this technical solution, the second protrusion 7 and the fifth groove provide circumferential positioning for the bushing assembly and the rotating shaft, thereby improving the stability between the bushing assembly and the rotating shaft.

[0046] It should be noted that the second protrusion 7 extends along the length of the axis of rotation.

[0047] It should be noted that the third protrusion 13 extends along the length of the rotor core 4. A magnet 6 is installed inside the rotor core 4.

[0048] In some embodiments, the second end is provided with a first protrusion 12, which extends circumferentially along the first bushing 1 and extends radially outward along the first bushing 1. The outer diameter of the first protrusion 12 is larger than the inner diameter of the rotor core 4, and a baffle 5 is provided between the first protrusion 12 and the end of the rotor core 4.

[0049] In this technical solution, pressure is applied to the rotor core 4 during assembly via the first protrusion 12. A baffle 5 is provided between the first protrusion 12 and the end of the rotor core 4 to prevent the first protrusion 12 from directly applying pressure to the rotor core 4 and causing damage to the rotor core 4.

[0050] In some embodiments, a first groove 11 is provided at the other end of the second bushing 2. The first groove 11 penetrates the outer peripheral wall of the second bushing 2 and extends circumferentially along the second bushing 2. A nut 8 is connected to the side wall of the first groove 11 along the radial direction of the second bushing 2. A baffle 5 is provided between the nut 8 and the end of the rotor core 4.

[0051] In this technical solution, in order to facilitate the length adjustment of the bushing assembly, the other end of the second bushing 2 is threaded with the nut 8 to apply pressure to the rotor core 4. The nut 8 and the first protrusion 12 cooperate to limit and fix the axial direction of the rotor core 4, thereby improving the stability between the rotor core 4 and the bushing assembly.

[0052] In some embodiments, a second fixing hole 10 is provided on the side wall of the first groove 11 along the radial direction of the second bushing 2, and a second fixing member is provided on the nut 8, the second fixing member passing through the nut 8 and connected in the second fixing hole 10.

[0053] In this technical solution, the second fixing hole 10 can be a pin hole, and the second fixing member can be a pin. The stability of the connection between the nut 8 and the second bushing 2 is ensured by the cooperation of the pin and the pin hole.

[0054] The rotor structure of this utility model reduces the number of parts while increasing the utilization rate of silicon steel; the stacking process holes can achieve neat and uniform stacking, improving production efficiency and product consistency; the fit between the first bushing 1 and the second bushing 2 can standardize parts; diversify finished products; and quickly realize the production and processing of rotor products with different power ranges; the pin placed in the fourth groove can be hidden and prevent loosening, improving the reliability of bushing connection; the locking nut 8 can be quickly locked, simplifying production and avoiding welding or heat fitting; improving production efficiency and facilitating disassembly and assembly.

[0055] This utility model also provides an electric motor, including the rotor structure described above.

[0056] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A rotor structure, characterized by: Includes: a bushing assembly, wherein a rotating shaft is fitted inside the bushing assembly and a rotor core (4) is fitted outside the bushing assembly. The bushing assembly includes a first bushing (1) and a second bushing (2), which are detachably connected along the axial direction of the bushing assembly.

2. The rotor structure of claim 1, wherein: The first bushing (1) has a first end and a second end. The first end is provided with a second groove. The second groove penetrates the outer wall of the first bushing (1). The second groove is annular. One end of the second bushing (2) is provided with a third groove. The third groove penetrates the inner wall of the second bushing (2). The second groove and the third groove extend circumferentially along the shaft and radially along the first bushing (1). The sidewall of the third groove is threadedly connected to the sidewall of the second groove.

3. The rotor structure according to claim 2, characterized in that: Along the radial direction of the first bushing (1), the sum of the width of the third groove and the width of the second groove is equal to the wall thickness of the first bushing (1), and the wall thicknesses of the first bushing (1) and the second bushing (2) are the same.

4. The rotor structure according to claim 2, characterized in that: A first fixing hole (3) is provided on the side wall of the third groove. The first fixing hole (3) penetrates the side wall of the third groove and is at least partially located inside the side wall of the second groove. A first fixing member is provided inside the first fixing hole (3).

5. The rotor structure according to claim 4, characterized in that: A fourth groove is provided on the outer wall of the bushing assembly. The fourth groove penetrates the bushing assembly along the axial direction of the bushing assembly. A third protrusion (13) is provided on the inner wall of the rotor core (4). The third protrusion (13) matches the fourth groove. The first fixing hole (3) is located at the bottom of the fourth groove.

6. The rotor structure according to claim 1, characterized in that: A fifth groove is provided on the inner wall of the bushing assembly. The fifth groove passes through the bushing assembly along the axial direction of the bushing assembly. A second protrusion (7) is provided on the rotating shaft, and the second protrusion (7) matches the fifth groove.

7. The rotor structure according to claim 2, characterized in that: The second end is provided with a first protrusion (12), the first protrusion (12) extends circumferentially along the first bushing (1), and the first protrusion (12) extends radially outward along the first bushing (1). The outer diameter of the first protrusion (12) is larger than the inner diameter of the rotor core (4). A baffle (5) is provided between the first protrusion (12) and the end of the rotor core (4).

8. The rotor structure according to claim 2, characterized in that: The other end of the second bushing (2) is provided with a first groove (11), which penetrates the outer peripheral wall of the second bushing (2). The first groove (11) extends along the circumference of the second bushing (2) and along the radial direction of the second bushing (2). A nut (8) is connected to the side wall of the first groove (11), and a baffle (5) is provided between the nut (8) and the end of the rotor core (4).

9. The rotor structure according to claim 8, characterized in that: Along the radial direction of the second bushing (2), a second fixing hole (10) is provided on the side wall of the first groove (11), and a second fixing member is provided on the nut (8). The second fixing member passes through the nut (8) and is connected in the second fixing hole (10).

10. An electric motor, characterized in that: The rotor structure includes any one of claims 1-9.

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