Rotor structure of brushless motor

Abstract

The utility model discloses a brushless motor rotor structure which comprises an iron core and a magnetic shoe. A plurality of magnetic shoes are arranged on the side wall of the iron core in a circular array mode, and meanwhile a support is arranged outside the iron core and the magnetic shoes in a wrapping mode. The iron core is formed by combining a plurality of silicon steel sheets, a shaft hole used for installing an electronic rotating shaft is formed in the center of the iron core, a plurality of convex ribs are further arranged on the side wall of the iron core in a circular array mode, and every two adjacent convex ribs are combined to form a clamping groove used for positioning a magnetic shoe; the magnetic shoe is fixed in the clamping groove; according to the utility model, the support not only can fix the silicon steel sheet of the iron core, but also can fix the magnetic shoe on the iron core; and meanwhile, the bracket is fixed on the iron core and the magnetic shoe in an insert injection molding manner, so that the mounting is convenient, and the process is simple.

Description

Technical Field

[0001] The utility model relates to the field of injection molded parts, in particular to a brushless motor rotor structure. Background Art

[0002] The motor rotor is the rotating part inside the motor and is an important component of the motor.

[0003] For example, the patent with authorization announcement number CN217789419U discloses a rotor and a permanent magnet synchronous motor having the same, wherein the rotor includes a rotor core and a rotor bracket, the rotor core is formed by multiple core units arranged along the circumferential direction and spliced ​​together, the core units form magnetic steel slots for setting magnetic steel; the rotor core forms a bracket mounting hole; the rotor bracket is arranged in the bracket mounting hole and connected to the rotor core; the magnetic steel leakage is reduced, the mechanical strength of the rotor core is improved, the utilization rate of the silicon steel sheet is improved, and flexible selection can be made when assembling the rotor to meet different production processes.

[0004] In the above patent, two adjacent core units are connected by the cooperation of rivet grooves and rivets, and the connection is reliable; the rotor core and the rotor bracket are connected by the cooperation of snap-in grooves and snap-in protrusions, and the assembly is convenient; however, the disadvantage of the above patent is that the rotor is composed of multiple core units, and the rotor core also needs a rotor bracket for support, there are many parts, and the processing technology is also very cumbersome.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a brushless motor rotor structure to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A brushless motor rotor structure, including an iron core and a magnetic tile; the side wall of the iron core is provided with a plurality of magnetic tiles in a circular array, and a bracket is also wrapped around the outside of the iron core and the magnetic tile; the iron core is composed of a plurality of silicon steel sheets, an axial hole for installing an electronic shaft is provided at the center of the iron core, a plurality of convex ribs are also provided in a circular array on the side wall of the iron core, and adjacent convex ribs are combined into a slot for positioning the magnetic tile; the magnetic tile is fixed in the slot; a plurality of fixing holes are also provided in a circular array on the iron core, and the bracket includes A first end and a second end, the first end and the second end are respectively located at the head and tail ends of the iron core, and a cylindrical protective wall is also arranged between the first end and the second end, and the protective wall fixes the magnetic tile in the slot on the iron core; an arc-shaped arc wall is arranged on the outer wall of the magnetic tile, and a first groove is arranged on both sides of the arc wall; a magnetic tile accommodating groove is opened on the protective wall corresponding to the magnetic tile, and a first fixed edge is extended inward at the opening of the magnetic tile accommodating groove corresponding to the position of the first groove, and the first fixed edge is arranged corresponding to the first groove.

[0009] Furthermore, the bracket is provided with a third end at the top of the iron core, a connecting tube is provided between the third end and the second end, and a plurality of reinforcing ribs are provided in a circular array at the connection between the connecting tube and the second end to enhance the structural strength of the bracket.

[0010] Furthermore, a plurality of connecting columns are arranged between the first end and the second end, and the connecting columns are located in the fixing holes on the iron core and are arranged in a one-to-one correspondence with the fixing holes.

[0011] Furthermore, the bracket is made of plastic.

[0012] Furthermore, the card slot is overall open, making it more convenient to insert the magnetic tile.

[0013] Furthermore, the upper and lower ends of the magnetic tile are also provided with second bevels, and the upper and lower sides of the opening of the magnetic tile receiving groove are provided with second fixed edges, and the second fixed edges are provided correspondingly to the second bevels.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The bracket of the utility model can not only fix the silicon steel sheet of the iron core, but also fix the magnetic tile on the iron core; at the same time, the bracket is fixed on the iron core and the magnetic tile by insert injection molding, which is convenient to install and has a simple process;

[0016] The utility model provides a first bevel on the left and right sides of the magnetic tile, and provides a first fixed edge on the left and right sides of the opening of the magnetic tile accommodating groove for installing the magnetic tile. The first fixed edge presses the first bevel, so that the magnetic tile is better fixed, and the arc wall of the magnetic tile can be completely exposed; that is, the fixing effect of the magnetic tile is improved, and the heat dissipation of the magnetic tile will not be hindered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the structure of a brushless motor rotor.

[0018] Figure 2 A side view of a brushless motor rotor structure.

[0019] Figure 3 for Figure 2 Sectional view along AA direction.

[0020] Figure 4 An exploded diagram of a brushless motor rotor structure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0022] See also Figure 1-4 , a brushless motor rotor structure, including an iron core and a magnetic shoe;

[0023] The side wall of the iron core 1 is provided with a plurality of magnetic tiles 2 in a circular array, and a bracket 3 is also provided outside the iron core 1 and the magnetic tiles; the bracket 3 is made of plastic.

[0024] The iron core 1 is composed of a plurality of silicon steel sheets.

[0025] The bracket of the utility model can not only fix the silicon steel sheet of the iron core 1, but also fix the magnetic tile 2 on the iron core 1;

[0026] The core 1 has a shaft hole 101 at its center for mounting an electronic shaft. The core 1 has a plurality of convex ribs 102 arranged in a circular array on its side wall. Adjacent convex ribs 102 are combined into a slot 103 for positioning the magnetic tile 2. The magnetic tile 2 is fixed in the slot 103. The core 1 also has a plurality of fixing holes 104 arranged in a circular array.

[0027] The bracket 3 includes a first end 301 and a second end 302, which are respectively located at the head and tail ends of the iron core 1, and a cylindrical protective wall 303 is provided between the first end 301 and the second end 302, and the protective wall 303 fixes the magnetic tile 2 in the slot 103 on the iron core 1;

[0028] Meanwhile, a plurality of connecting posts 304 are arranged between the first end 301 and the second end 302. The connecting posts 304 are located in the fixing holes 104 on the iron core 1 and are arranged one-to-one corresponding to the fixing holes 104.

[0029] In this solution, the outer side wall of the magnetic tile 2 is provided with an arc-shaped arc wall 201, and both sides of the arc wall 201 are provided with a first groove 202;

[0030] The protective wall 303 is provided with a magnetic tile receiving groove 309 corresponding to the magnetic tile 2, and a first fixed edge 305 is provided extending inwardly from the opening of the magnetic tile receiving groove 309 corresponding to the position of the first groove 202, and the first fixed edge 305 is provided corresponding to the first groove 202;

[0031] If the bracket 3 completely covers the magnetic tile 2, such protection and fixing performance is indeed the best, but considering the heat dissipation and other issues, the magnetic tile is generally not completely covered;

[0032] The utility model provides a first groove 202 on the left and right sides of the magnetic tile 2, and provides a first fixing edge 305 on the left and right sides of the opening of the magnetic tile receiving groove 309 for installing the magnetic tile. The first fixing edge 305 presses the first groove 202, thereby better fixing the magnetic tile, and the arc wall 201 of the magnetic tile can be completely exposed. That is, the fixing effect of the magnetic tile is improved, and the heat dissipation of the magnetic tile will not be hindered.

[0033] During the processing of the utility model, the magnetic tile is first fixed on the iron core 1 by glue, and then the bracket is fixed on the iron core 1 and the magnetic tile by insert injection molding;

[0034] At the same time, in this solution, the magnetic tile 2 is located at the lower end of the iron core, so a third end 306 is also provided on the bracket 3 at the top of the iron core, and a connecting tube 307 is provided between the third end 306 and the second end 302. At the same time, a plurality of reinforcing ribs 308 are provided in a circular array at the connection between the connecting tube 307 and the second end 302 to enhance the structural strength of the bracket.

[0035] In this solution, the card slot 103 is open as a whole, which makes it more convenient to put the magnetic tile in;

[0036] In this embodiment, the upper and lower ends of the magnetic tile 2 are also provided with second grooves 4 , and the upper and lower sides of the opening of the magnetic tile receiving groove 309 are provided with second fixed edges 401 , which are provided correspondingly to the second grooves 4 .

[0037] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A brushless motor rotor structure, comprising an iron core and a magnetic shoe; characterized in that: The side wall of the iron core is provided with a plurality of magnetic tiles in a circular array, and a bracket is also wrapped around the outside of the iron core and the magnetic tiles; the iron core is composed of a plurality of silicon steel sheets, and an axial hole for installing an electronic shaft is provided at the center of the iron core. The side wall of the iron core is also provided with a plurality of convex ribs in a circular array, and adjacent convex ribs are combined into a slot for positioning the magnetic tile; the magnetic tile is fixed in the slot; the iron core is also provided with a plurality of fixing holes in a circular array, and the bracket includes a first end and a second end, and the first end and the second end are respectively located at the head and tail ends of the iron core, and a cylindrical protective wall is also provided between the first end and the second end, and the protective wall fixes the magnetic tile in the slot on the iron core; an arc-shaped arc wall is provided on the outer wall of the magnetic tile, and a first groove is provided on both sides of the arc wall; a magnetic tile receiving groove is provided on the protective wall corresponding to the magnetic tile, and a first fixed edge is provided at the opening of the magnetic tile receiving groove extending inwardly corresponding to the position of the first groove, and the first fixed edge is provided corresponding to the first groove.

2. A brushless motor rotor structure according to claim 1, characterized in that: The bracket is also provided with a third end at the top of the iron core, a connecting tube is provided between the third end and the second end, and a plurality of reinforcing ribs are provided in a circular array at the connection between the connecting tube and the second end to enhance the structural strength of the bracket.

3. A brushless motor rotor structure according to claim 1, characterized in that: A plurality of connecting posts are also arranged between the first end and the second end. The connecting posts are located in the fixing holes on the iron core and are arranged one-to-one corresponding to the fixing holes.

4. A brushless motor rotor structure according to claim 1, characterized in that: The bracket is made of plastic.

5. The brushless motor rotor structure according to claim 1, characterized in that: The card slot is overall open, making it more convenient to put in the magnetic tile.

6. The brushless motor rotor structure according to claim 1, characterized in that: The upper and lower ends of the magnetic tile are also provided with second bevels, and the upper and lower sides of the opening of the magnetic tile receiving groove are provided with second fixed edges, and the second fixed edges are provided correspondingly to the second bevels.

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