Miniature motor rotor structure

Abstract

The utility model discloses a miniature motor rotor structure, which relates to the field of miniature motors and comprises a rotor core arranged on the periphery of a rotating shaft, an outer baffle plate and an inner baffle plate, connecting ring discs are arranged at two ends of the outer baffle plate, and an inner ring plate and an outer ring plate are fixedly connected to positions, close to the inner edge and the outer edge, of the inner side surface of each connecting ring disc respectively. The inner ends of the two sets of inner ring plates are fixedly connected with fixing ring discs, sealing ring discs are arranged in the middles of the back-to-back sides of the two sets of fixing ring discs, the inner baffle is located in the outer baffle, the inner baffle is connected to the periphery of the rotating shaft in a sleeving mode, and the inner baffle and the outer baffle are the same in length and size. The rotor structure has the advantages that external fluid can be prevented from flowing into the rotor core to influence the service life of the rotor structure, the sealing performance of the rotor structure is comprehensively improved, heat on the inner side of the rotor structure can be effectively dissipated under the condition that the sealing performance of the rotor structure is ensured, and the service life of the rotor structure is remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the field of micro motors, in particular to a micro motor rotor structure. Background Art

[0002] Micro motors are small, compact and low-power motors. The rotor structure of a micro motor refers to a component inside the motor. It is the rotating part of the motor and is responsible for rotating the output shaft of the motor. The design of the rotor structure plays a key role in the performance, efficiency and stability of the motor.

[0003] After searching, the patent number is CN210016338U, which discloses a permanent magnet rotor structure of a micro motor. The magnetic steel on this rotor is solid, and the magnetic steel processing is simple, and there is no need to dig a center hole. During processing, it is convenient to process by grinding the outer circle of the magnetic steel appropriately. The magnetic steel is a whole circle with good balance and no need for dynamic balancing. In addition, with such a structure, the diameter selection range of the shaft is large, the overall strength is high, the torque output is large, and it is not easy to bend and deform. However, when the existing micro motor rotor structure is in use, the external fluid can easily enter the position of the rotor core along the rotating shaft or directly from the outside, thereby affecting the operation of the rotor structure and seriously affecting the service life of the rotor structure. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a micro motor rotor structure. When the existing micro motor rotor structure is in use, external fluid can easily enter the position of the rotor core along the shaft or directly from the outside, thereby affecting the operation of the rotor structure and seriously affecting the service life of the rotor structure.

[0005] In order to solve the above technical problems, the technical solution of the utility model is a micro motor rotor structure, including a rotor core arranged on the periphery of a rotating shaft, and also including an outer baffle plate and an inner baffle plate, both ends of the outer baffle plate are provided with connecting ring disks, the inner side surfaces of the connecting ring disks are respectively fixedly connected with inner ring plates and outer ring plates near the inner and outer edges, the inner ends of the two groups of inner ring plates are fixedly connected with fixing ring disks, and sealing ring disks are provided at the middle positions of the back-to-back sides of the two groups of fixing ring disks.

[0006] As a further solution of the utility model: the inner baffle is located inside the outer baffle, the inner baffle is sleeved on the periphery of the rotating shaft, the inner baffle is the same length as the outer baffle, and the rotor core is located between the inner baffle and the outer baffle.

[0007] As a further solution of the utility model: the inner ring plate and the outer ring plate are respectively located on the inner and outer sides of the outer ring plate, the two groups of fixed ring discs are respectively fitted with the two ends of the rotor core, and the two groups of sealing ring discs are both sleeved on the outer side of the inner baffle.

[0008] As a further solution of the utility model: the opposite ends of the two groups of outer ring plates are fixedly connected with second internal threaded ring plates, the outer side surface of the outer baffle plate is provided with first screw grooves near both ends, and the two groups of second internal threaded ring plates are respectively threadedly connected to the outer baffle plate through the first screw grooves.

[0009] As a further solution of the utility model: a first internal threaded ring plate is arranged on the back-to-back sides of the two groups of sealing ring disks, a second screw groove is arranged on the outer side surfaces of the two groups of inner baffle plates near both ends, and the two groups of first internal threaded ring plates are respectively threadedly connected to the inner baffle plates through the second screw grooves.

[0010] As a further solution of the utility model: micro fans are sleeved on the outer side surfaces of the rotating shaft near both ends, a first heat-conducting rod is penetrated on the inner side of the rotating shaft, a second heat-conducting rod is fixedly penetrated on the outer side surfaces of the first heat-conducting rod near both sides, a plurality of groups of annular fins are sleeved on the outer side surfaces of two groups of the second heat-conducting rods at equal distances near both sides, and a plurality of groups of strip openings are penetrated through the outer side surface of the rotating shaft and located on the inner side of the inner baffle.

[0011] As a further solution of the utility model: two groups of the second heat-conducting rods are arranged perpendicularly to the first heat-conducting rods, and the two groups of the second heat-conducting rods are respectively located on both sides of the inner baffle, and several groups of the strip openings are evenly spaced and distributed on the rotating shaft.

[0012] The utility model adopts the above technical scheme, and has the following advantages compared with the prior art: firstly, two groups of connecting ring discs are respectively placed at the two ends of the outer baffle plate, at which time, the two groups of inner ring plates and the two groups of outer ring plates are respectively tightly fitted on the inner and outer sides of the outer baffle plate, and the two groups of second inner threaded ring plates are tightly connected to the outer side surface of the outer baffle plate through the cooperation of the second inner threaded ring plate and the second screw groove, and then the two groups of sealing ring discs are respectively placed on the outer side surfaces of the two groups of fixed ring discs, and the two groups of sealing ring discs are tightly sleeved on the outer side of the inner baffle plate through the cooperation of the first inner threaded ring plate and the first screw groove, which can prevent the external fluid from flowing into the rotor core and affecting the service life of the rotor structure, and comprehensively improve the sealing performance of the rotor structure.

[0013] The heat on the inner side of the rotor structure is introduced into the second heat-conducting rod through several groups of strip-shaped openings, and then the heat is transferred to the two groups of second heat-conducting rods respectively through the first heat-conducting rod until the heat is transferred to several groups of annular fins. When the micro-motor drives the rotating shaft to rotate, the two groups of micro-fans will rotate along with the rotating shaft to take away the heat from the several groups of annular fins. The heat on the inner side of the rotor structure can be effectively dissipated while ensuring the sealing of the rotor structure, thereby significantly improving the service life of the rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a micro motor rotor structure in an embodiment of the utility model;

[0015] Figure 2 A partial cross-sectional view of a micro motor rotor structure in an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure of the rotating shaft in the embodiment of the utility model;

[0017] Figure 4 It is a side view of a micro motor rotor structure in an embodiment of the utility model.

[0018] In the figure: 1, rotating shaft; 2, rotor core; 3, outer baffle; 4, inner baffle; 5, connecting ring disk; 6, outer ring plate; 7, inner ring plate; 8, fixed ring disk; 9, sealing ring disk; 10, first internal threaded ring plate; 11, second internal threaded ring plate; 12, micro fan; 13, first heat conducting rod; 14, second heat conducting rod; 15, ring fin; 16, strip opening. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1, please refer to Figure 1-Figure 4 A micro motor rotor structure includes a rotor core 2 arranged on the periphery of a rotating shaft 1, and also includes an outer baffle plate 3 and an inner baffle plate 4. Both ends of the outer baffle plate 3 are provided with connecting ring disks 5. The inner side surfaces of the connecting ring disks 5 are fixedly connected with inner ring plates 7 and outer ring plates 6 near the inner and outer edges respectively. The inner ends of the two groups of inner ring plates 7 are fixedly connected with fixing ring disks 8. The middle positions of the two groups of fixing ring disks 8 on the back-to-back sides are provided with sealing ring disks 9.

[0021] The inner baffle plate 4 is located inside the outer baffle plate 3, and the inner baffle plate 4 is sleeved on the periphery of the rotating shaft 1. The inner baffle plate 4 and the outer baffle plate 3 have the same length. The rotor core 2 is located between the inner baffle plate 4 and the outer baffle plate 3. The inner ring plate 7 and the outer ring plate 6 are respectively located on the inner and outer sides of the outer ring plate 6. The two groups of fixed ring disks 8 are respectively fitted with the two ends of the rotor core 2, and the two groups of sealing ring disks 9 are both sleeved on the outer side of the inner baffle plate 4.

[0022] In this embodiment, the outer baffle plate 3 and the inner baffle plate 4 cooperate to provide preliminary protection for the rotor core 2 .

[0023] The opposite ends of the two sets of outer ring plates 6 are fixedly connected with second internally threaded ring plates 11, the outer side surface of the outer baffle plate 3 is provided with first screw grooves near both ends, and the two sets of second internally threaded ring plates 11 are respectively threadedly connected with the outer baffle plate 3 through the first screw grooves.

[0024] In this embodiment, the second internally threaded ring plate 11 and the second screw groove are used to ensure that the two sets of outer ring plates 6 are tightly fitted to the outer baffle plate 3 .

[0025] The two sets of sealing ring disks 9 are both provided with first internal threaded ring plates 10 on their back-to-back sides, the two sets of inner baffle plates 4 are both provided with second screw grooves on their outer sides near both ends, and the two sets of first internal threaded ring plates 10 are respectively threadedly connected to the inner baffle plates 4 through the second screw grooves.

[0026] In this embodiment, the sealing ring plate 9 is tightly attached to the outer side of the fixed ring plate 8 through the first internal threaded ring plate 10 and the second threaded groove.

[0027] Specifically, the two groups of connecting ring plates 5 are first placed at the two ends of the outer baffle plate 3 respectively. At this time, the two groups of inner ring plates 7 and the two groups of outer ring plates 6 are tightly fitted on the inner and outer sides of the outer baffle plate 3 respectively, and the two groups of second inner threaded ring plates 11 are tightly connected to the outer side surface of the outer baffle plate 3 through the cooperation of the second inner threaded ring plate 11 and the second screw groove. Then, the two groups of sealing ring plates 9 are respectively placed on the outer sides of the two groups of fixed ring plates 8, and the two groups of sealing ring plates 9 are tightly sleeved on the outer side of the inner baffle plate 4 through the cooperation of the first inner threaded ring plate 10 and the first screw groove, which can prevent the external fluid from flowing into the rotor core 2 and affecting the service life of the rotor structure, thereby comprehensively improving the sealing performance of the rotor structure.

[0028] Example 2, please refer to Figure 1-Figure 4 A micro motor rotor structure, wherein micro fans 12 are sleeved on the outer side of a rotating shaft 1 near both ends, a first heat conducting rod 13 is penetrated on the inner side of the rotating shaft 1, a second heat conducting rod 14 is fixedly penetrated on the outer side of the first heat conducting rod 13 near both sides, a plurality of groups of annular fins 15 are sleeved on the outer side of the two groups of second heat conducting rods 14 at equal distances near both sides, and a plurality of groups of strip openings 16 are penetrated on the outer side of the rotating shaft 1 and located on the inner side of the inner baffle 4.

[0029] The two groups of second heat-conducting rods 14 are arranged perpendicularly to the first heat-conducting rods 13, and the two groups of second heat-conducting rods 14 are respectively located on both sides of the inner baffle 4, and a plurality of groups of strip-shaped openings 16 are evenly spaced and distributed on the rotating shaft 1.

[0030] In this embodiment, a plurality of groups of strip-shaped openings 16 cooperate with the first heat-conducting rods 13 to transfer heat to the two groups of second heat-conducting rods 14 .

[0031] Specifically, the heat on the inner side of the rotor structure is introduced into the second heat-conducting rod 14 through several groups of strip-shaped openings 16, and then the heat is transferred to the two groups of second heat-conducting rods 14 respectively through the first heat-conducting rod 13, until the heat is transferred to several groups of annular fins 15. When the micro-motor drives the rotating shaft 1 to rotate, the two groups of micro-fans 12 will rotate together with the rotating shaft 1 to take away the heat from the several groups of annular fins 15, which can effectively dissipate the heat on the inner side of the rotor structure while ensuring the sealing of the rotor structure, thereby significantly improving the service life of the rotor structure.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A micro motor rotor structure, comprising a rotor core (2) arranged on the periphery of a rotating shaft (1), characterized in that: It also comprises an outer baffle plate (3) and an inner baffle plate (4), both ends of the outer baffle plate (3) are provided with connecting ring discs (5), the inner side surfaces of the connecting ring discs (5) are respectively fixedly connected with inner ring plates (7) and outer ring plates (6) near the inner and outer edges, the inner ends of the two groups of inner ring plates (7) are fixedly connected with fixing ring discs (8), and the middle positions of the two groups of fixing ring discs (8) on the back-to-back sides are provided with sealing ring discs (9).

2. A micro motor rotor structure according to claim 1, characterized in that: The inner baffle (4) is located inside the outer baffle (3), the inner baffle (4) is sleeved on the periphery of the rotating shaft (1), the inner baffle (4) and the outer baffle (3) are of the same length, and the rotor core (2) is located between the inner baffle (4) and the outer baffle (3).

3. A micro motor rotor structure according to claim 2, characterized in that: The inner ring plate (7) and the outer ring plate (6) are respectively located on the inner and outer sides of the outer ring plate (6), the two groups of fixed ring discs (8) are respectively fitted with the two ends of the rotor core (2), and the two groups of sealing ring discs (9) are both sleeved on the outer side of the inner baffle (4).

4. A micro motor rotor structure according to claim 3, characterized in that: The opposite ends of the two groups of outer ring plates (6) are fixedly connected to second internally threaded ring plates (11), the outer side surface of the outer baffle plate (3) is provided with first screw grooves near both ends, and the two groups of second internally threaded ring plates (11) are respectively threadedly connected to the outer baffle plate (3) through the first screw grooves.

5. The micro motor rotor structure according to claim 3, characterized in that: The two groups of sealing ring discs (9) are both provided with first internally threaded ring plates (10) on their back-to-back sides, the two groups of inner baffle plates (4) are both provided with second screw grooves on their outer sides near both ends, and the two groups of first internally threaded ring plates (10) are respectively threadedly connected to the inner baffle plates (4) via the second screw grooves.

6. The micro motor rotor structure according to claim 1, characterized in that: The outer side surface of the rotating shaft (1) is sleeved with micro fans (12) near both ends, the inner side of the rotating shaft (1) is penetrated by a first heat-conducting rod (13), the outer side surface of the first heat-conducting rod (13) is clamped and penetrated by a second heat-conducting rod (14) near both sides, the outer side surfaces of two groups of the second heat-conducting rods (14) are sleeved with a plurality of groups of annular fins (15) at equal distances near both sides, and the outer side surface of the rotating shaft (1) and the inner side of the inner baffle (4) are penetrated by a plurality of groups of strip openings (16).

7. A micro motor rotor structure according to claim 6, characterized in that: The two groups of the second heat-conducting rods (14) are both arranged perpendicularly to the first heat-conducting rods (13), and the two groups of the second heat-conducting rods (14) are respectively located on both sides of the inner baffle (4), and a plurality of groups of the strip-shaped openings (16) are evenly spaced and distributed on the rotating shaft (1).

Images