A low resistance structure motor

Abstract

The utility model is applied to the field of motors, specifically a low-resistance structure motor, comprising a frame, and a rotating shaft, a stator and a rotor all accommodated in the frame, the rotor being accommodated in the stator, the rotating shaft being fixedly connected to the rotor, a first cover plate and a second cover plate being respectively arranged on two sides of the frame, a plurality of placement grooves being annularly provided on the outer wall of the stator, permanent magnets being placed in the placement grooves, the cross sections of the placement grooves and the cross sections of the permanent magnets being both pear-shaped, a limiting cover for limiting the permanent magnets being connected to one side of the stator, a supporting surface for supporting the permanent magnets being provided at one end of the stator close to the first cover plate, a heat dissipation through hole being provided on the supporting surface, one end of the rotating shaft sequentially passing through the second cover plate, the limiting cover, the rotor and the first cover plate, and the arrangement of the pear-shaped permanent magnets to achieve the function of optimizing the magnetic field distribution and the magnetic path of the utility model, reducing the magnetic flux distortion and reducing the running resistance of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor with a low resistance structure. Background Art

[0002] Magnetic flux distortion refers to the abnormal change or distortion of the distribution or size of magnetic flux in the magnetic field.

[0003] Traditional motors include synchronous motors, asynchronous motors and DC motors. The slot shapes set in traditional motors are mostly rectangular or trapezoidal. This slot shape is prone to cause magnetic flux distortion, which increases the motor's operating resistance and reduces the motor's working efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a motor with a low resistance structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-resistance structure motor, comprising a frame, and a rotating shaft, a stator and a rotor all accommodated in the frame, the rotor being accommodated in the stator, the rotating shaft being fixedly connected to the rotor, a first cover plate and a second cover plate being respectively provided on both sides of the frame, a plurality of placement grooves being annularly provided on the outer wall of the stator, permanent magnets being placed in the placement grooves, the cross-sections of the placement grooves and the permanent magnets being both pear-shaped, a limiting cover for limiting the permanent magnets being connected to one side of the stator, a supporting surface for supporting the permanent magnet being provided at one end of the stator close to the first cover plate, a heat dissipation through-hole being provided on the supporting surface, and one end of the rotating shaft sequentially passes through the second cover plate, the limiting cover, the rotor and the first cover plate.

[0006] Preferably, two fixing grooves are symmetrically provided on the inner side wall of the frame, and fixing bosses are symmetrically provided on the outer periphery of the stator, and the fixing bosses are snap-fitted with the fixing grooves.

[0007] Preferably, a plurality of heat dissipation slots are provided on the outer periphery of the frame, and the bottom width of the heat dissipation slots is greater than the opening width of the heat dissipation slots.

[0008] Preferably, two first fixing holes are symmetrically provided on both sides of the interior of the frame, a first fixing pin is protrudingly provided on one side of the first cover plate, and the first fixing pin is interference-fastenedly connected with the first fixing hole.

[0009] Preferably, a second fixing pin is protrudingly provided on one side of the second cover plate, and the second fixing pin is interference-fastenedly connected to the first fixing hole.

[0010] Preferably, a second fixing hole is formed at one end of the stator close to the second cover plate, and a connecting pin is formed at one side of the limiting cover, and the connecting pin is interference-fastened with the second fixing hole.

[0011] Preferably, a circulation groove is provided on the outer circumference of the rotor, the cross section of the circulation groove is V-shaped, and a gap is formed between the outer surface of the rotor and the inner surface of the stator.

[0012] Preferably, the length of the accommodating groove is the same as the length of the rotor.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. A low-resistance structure motor, comprising a frame, and a rotating shaft, a stator and a rotor all accommodated in the frame, the rotor being accommodated in the stator, the rotating shaft being fixedly connected to the rotor, a first cover plate and a second cover plate being respectively provided on both sides of the frame, the outer wall of the stator being annularly provided with a plurality of placement grooves, the placement grooves being provided with permanent magnets, the cross sections of the placement grooves and the cross sections of the permanent magnets being both pear-shaped, a limiting cover for limiting the permanent magnets being connected to one side of the stator, a supporting surface for supporting the permanent magnets being provided at one end of the stator close to the first cover plate, a heat dissipation through-hole being provided on the supporting surface, one end of the rotating shaft sequentially passing through the second cover plate, the limiting cover, the rotor and the first cover plate, the uniform width change of the pear-shaped permanent magnets, the parallel tooth walls and the reduction of the effective length of the air gap are used to optimize the magnetic field distribution and the magnetic flux path, so as to realize the function of reducing magnetic flux distortion and reducing the running resistance of the motor of the utility model, thereby improving the working efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded diagram of the utility model;

[0017] Figure 3 This is a cross-sectional view of the stator structure of the utility model;

[0018] Figure 4 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 5 It is a partial enlarged view of the utility model;

[0020] In the figure: frame 1, fixing slot 10, first fixing hole 11, heat dissipation slot 12, first cover plate 2, first fixing pin 20, rotating shaft 3, stator 4, mounting slot 40, supporting surface 41, heat dissipation through hole 42, second fixing hole 43, fixing boss 44, rotor 5, circulation slot 50, limit cover 6, second cover plate 7, second fixing pin 70. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate directions or positional relationships based on the attached Figure 2 The orientation or position relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figures 1 to 5 As shown, the present embodiment is a low resistance structure motor, comprising a frame 1, and a rotating shaft 3, a stator 4 and a rotor 5 all accommodated in the frame 1, the rotor 5 being accommodated in the stator 4, the rotating shaft 3 being fixedly connected to the rotor 5, a first cover plate 2 and a second cover plate 7 being respectively provided on both sides of the frame 1, a plurality of placement grooves 40 being annularly opened on the outer wall of the stator 4, a permanent magnet (not shown in the figure) being placed in the placement groove 40, a cross section of the placement groove 40 and a cross section of the permanent magnet being both pear-shaped, a limiting cover 6 for limiting the permanent magnet being connected to one side of the stator 4, a supporting surface 41 for supporting the permanent magnet being provided at one end of the stator 4 close to the first cover plate 2, one end of the rotating shaft 3 sequentially passes through the second cover plate 7, the limiting cover 6, the rotor 5 and the first cover plate 2, the length of the placement groove 40 is the same as the length of the rotor 5, realizing the overall connection of the utility model.

[0025] Specifically, a placement groove 40 is opened above the support surface 41, and the permanent magnet is inserted into the placement groove 40. The cross-section of the permanent magnet and the placement groove 40 are both pear-shaped. Through the arrangement of the pear-shaped groove and the pear-shaped permanent magnet, through the uniform width change of the pear-shaped permanent magnet, the parallel tooth wall and the reduction of the effective length of the air gap, the utility model optimizes the magnetic field distribution and optimizes the magnetic flux path, and realizes the function of reducing magnetic flux distortion and reducing the running resistance of the motor.

[0026] Furthermore, a heat dissipation through hole 42 is provided on the support surface 41 , and the heat dissipation function of the stator 4 of the utility model is realized by the heat dissipation through hole 42 for dissipating heat to the permanent magnet and the stator 4 when the motor is running.

[0027] Furthermore, a second fixing hole 43 is formed at one end of the stator 4 close to the second cover plate 7, and a connecting pin is protruding from one side of the limiting cover 6. The connecting pin is inserted into the second fixing hole 43, and the connection is achieved by interference fastening. The limiting cover 6 and the stator 4 of the utility model are connected. The limiting cover 6 limits the permanent magnet, thereby enhancing the stability of the permanent magnet of the utility model.

[0028] Furthermore, fixing grooves 10 are provided at both ends of the frame 1, and fixing bosses 44 are provided on the outside of the stator 4. The fixing bosses 44 are engaged with the fixing grooves 40 to achieve a fixed connection between the stator 4 and the frame 1, thereby realizing the limiting function of the stator 4 of the utility model.

[0029] Furthermore, first fixing holes 11 are provided on both sides of the frame 1, a first fixing pin 20 is protrudingly provided on one side of the first cover plate 2, the first fixing pin 20 is inserted into the first fixing hole 11, and the first cover plate 2 is fixedly connected to the frame 1 through interference fastening, and a second fixing pin 70 is protrudingly provided on one side of the second cover plate 7, the second fixing pin 70 is inserted into the first fixing hole 11, and the second cover plate is fixedly connected to the frame 1 through interference fastening, thereby realizing the protection function and dustproof function of the stator 4.

[0030] Furthermore, a heat dissipation groove 12 is provided on the outer periphery of the frame 1 , and the bottom width of the heat dissipation groove 12 is greater than the opening width of the heat dissipation groove 12 , thereby increasing the heat dissipation area of ​​the utility model and improving the heat dissipation efficiency of the utility model.

[0031] Furthermore: a circulation groove 50 is provided on the outer circumference of the rotor 5, and the cross-section of the circulation groove 50 is V-shaped. There is a gap between the surface of the rotor 5 and the inner surface of the stator 4. By providing the circulation groove 50, air circulation is achieved. When the rotor 5 of the utility model rotates, the air resistance and friction resistance are reduced, thereby realizing the resistance reduction function of the motor of the utility model.

[0032] The method of using this embodiment is as follows: after the utility model is powered on, the permanent magnets provided in the stator 4 generate a strong magnetic field, and when the current passes through the coils provided inside the rotor 5, a magnetic field is generated. The generated magnetic field interacts with the strong magnetic field of the stator permanent magnet, thereby generating a torque, driving the motor to rotate, and realizing the energy conversion of the utility model.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low resistance structure motor, comprising a frame (1), and a rotating shaft (3), a stator (4) and a rotor (5) all accommodated in the frame (1), wherein the rotor (5) is accommodated in the stator (4), the rotating shaft (3) and the rotor (5) are fixedly connected, and a first cover plate (2) and a second cover plate (7) are respectively provided on both sides of the frame (1), characterized in that: The outer wall of the stator (4) is provided with a plurality of placement grooves (40) in an annular shape. The placement grooves (40) are provided with permanent magnets. The cross-sections of the placement grooves (40) and the cross-sections of the permanent magnets are both pear-shaped. A limiting cover (6) for limiting the permanent magnets is connected to one side of the stator (4). An end of the stator (4) close to the first cover plate (2) is provided with a supporting surface (41) for supporting the permanent magnets. A heat dissipation through hole (42) is provided on the supporting surface (41). One end of the rotating shaft (3) passes through the second cover plate (7), the limiting cover (6), the rotor (5) and the first cover plate (2) in sequence.

2. The low resistance structure motor according to claim 1, characterized in that: Two fixing grooves (10) are symmetrically provided on the inner side wall of the frame (1), and fixing bosses (44) are symmetrically provided on the outer periphery of the stator (4), wherein the fixing bosses (44) are snap-fitted with the fixing grooves (10).

3. The low resistance structure motor according to claim 1, characterized in that: A plurality of heat dissipation slots (12) are provided on the outer periphery of the frame (1), and the bottom width of the heat dissipation slots (12) is greater than the opening width of the heat dissipation slots (12).

4. The low resistance structure motor according to claim 1, characterized in that: Two first fixing holes (11) are symmetrically provided on both sides of the interior of the frame (1); a first fixing pin (20) is protruding from one side of the first cover plate (2); the first fixing pin (20) is interference-fastenedly connected to the first fixing hole (11).

5. The low resistance structure motor according to claim 4, characterized in that: A second fixing pin (70) is protrudingly provided on one side of the second cover plate (7), and the second fixing pin (70) is interference-fastenedly connected to the first fixing hole (11).

6. The low resistance structure motor according to claim 1, characterized in that: A second fixing hole (43) is provided at one end of the stator (4) close to the second cover plate (7), and a connecting pin is provided on one side of the limit cover (6), and the connecting pin is connected to the second fixing hole (43) in an interference fit.

7. The low resistance structure motor according to claim 1, characterized in that: A circulation groove (50) is provided on the outer circumference of the rotor (5), the cross section of the circulation groove is V-shaped, and a gap is formed between the outer surface of the rotor (5) and the inner surface of the stator (4).

8. The low resistance structure motor according to claim 1, characterized in that: The length of the accommodation groove (40) is the same as the length of the rotor (5).

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