Stator structure for hub motor of electric vehicle

Abstract

The utility model relates to a stator structure for a hub motor of an electric vehicle, which belongs to the technical field of hub motors of electric vehicles and comprises a stator support, a stator core, an insulating short plate and a winding, the stator core is arranged on the peripheral side of the stator support, a plurality of stator slots are uniformly distributed on the peripheral side of the stator core, and the insulating short plate is arranged in the stator slots. A winding support for winding of the winding is arranged between every two adjacent stator grooves, the number of the insulating short plates is two, the insulating short plates are fixed to the two sides of the stator iron core through the stator supports, the winding is wound around the winding supports and the insulating short plates, the winding is composed of flat wires, the stator supports comprise a left support, a right support and a fixing cylinder, and the left support and the right support are fixed through the fixing cylinder. And the fixed cylinder is fixedly arranged at the middle end parts of the left bracket and the right bracket. The utility model aims to provide the stator structure for the hub motor of the electric vehicle, which has the advantages that the structure is reasonable, the overall strength of the stator bracket is higher, and the installation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle hub motors, in particular to a stator structure used for electric vehicle hub motors. Background Art

[0002] Nowadays, as people's pace of life is getting faster and faster, urban traffic congestion is becoming more and more serious, so electric vehicles are favored as green transportation tools. After years of development, the electric vehicle market has become increasingly saturated, and as market competition becomes increasingly fierce, electric vehicles have gone from initially meeting functional needs to pursuing excellent performance and riding comfort, and are increasingly pursuing cost-effectiveness of the entire vehicle. As the main accessory of electric vehicles, the cost-effectiveness of hub motors has also become an important indicator for major electric vehicle manufacturers to consider. As a means of transportation, electric vehicles have a range, service life, working stability, power, noise, etc., which have become the standards for customer selection and are also the general direction of research by major motor manufacturers.

[0003] Most of the motors used in two-wheeled electric vehicles are hub motors, which are mainly composed of two major parts: the stator and the rotor. The stator is generally composed of an iron core and a bracket. The bracket contains two blanking parts, and the welded sleeve in the middle is used to fix the motor shaft. The teeth of the stator iron core are wound with enameled wire according to a certain pattern. The current is provided by the battery, and the power-on pattern is controlled by the controller to achieve directional rotation of the motor, output speed and torque.

[0004] The domestic database has disclosed a patent number of 202221128473.6, and the patent name is an electric vehicle hub motor stator assembly, which includes a left bracket, and the left bracket extends to the stator core on one side away from the axis to form a first retaining ring, and a right bracket, and the right bracket extends to the stator core on one side away from the axis to form a second retaining ring, and the second retaining ring and the first retaining ring are respectively located on the two axial sides of the stator core, and the convex strips are respectively installed on the surface of the left bracket and the right bracket, and the axial size is less than 1 / 3 of the axial size of the stator core, and the groove is opened on the inner wall of the stator core and is adapted to the convex strip, wherein a threaded hole is opened on the left bracket, and a through hole is opened on the right bracket, and the left bracket and the right bracket are fixed by bolts. The above patent uses the left bracket and the right bracket to improve the overall structural strength and stability of the stator, but it is installed and fixed by multiple bolts, and the installation is more troublesome, and the connection stability between the two is not high. Utility Model Content

[0005] The utility model aims to provide a stator structure for an electric vehicle hub motor which has a reasonable structure, a high overall strength of a stator bracket and is easy to install.

[0006] The purpose of the utility model is achieved in this way:

[0007] A stator structure for an electric vehicle hub motor comprises a stator bracket, a stator core, an insulating short plate and a winding, wherein the stator core is arranged on the outer peripheral side of the stator bracket, a plurality of stator slots are evenly distributed on the outer peripheral side of the stator core, a winding bracket for winding to be wound around is arranged between two adjacent stator slots, the insulating short plate consists of two pieces and is fixed to both sides of the stator core through the stator bracket, and the winding is wound around the winding bracket and the insulating short plate, the winding is composed of a flat wire, and the stator bracket comprises a left bracket, a right bracket and a fixing cylinder, and the fixing cylinder is fixed to the middle end portions of the left bracket and the right bracket.

[0008] In the above-mentioned stator structure for the electric vehicle hub motor, the left bracket is provided with a connecting hole 1 and a connecting tube 1, and the right bracket is provided with a connecting tube 2 used in conjunction with the connecting hole 1 and a connecting hole 2 used in conjunction with the connecting tube 1.

[0009] In the above-mentioned stator structure for the electric vehicle hub motor, a plurality of teardrop-shaped reinforcement grooves 1 are formed on the left bracket, and a plurality of teardrop-shaped reinforcement grooves 2 are formed on the right bracket.

[0010] In the above-mentioned stator structure for the electric vehicle hub motor, the connection hole 1 and the connection tube 1 on the left bracket are located in the teardrop-shaped reinforcement groove 1, and the connection tube 2 and the connection hole 2 on the right bracket are located in the teardrop-shaped reinforcement groove 2.

[0011] In the above-mentioned stator structure for the hub motor of an electric vehicle, the outer edges of the left bracket and the right bracket are bent upward and outward to form insulating short plate fixing pieces.

[0012] In the above-mentioned stator structure for the electric vehicle hub motor, a plurality of heat dissipation holes are provided on the left bracket and the right bracket.

[0013] In the above-mentioned stator structure for the electric vehicle hub motor, the width of the flat wire is 1.5-2.5 mm, and the thickness is 0.8-1.2 mm.

[0014] In the above-mentioned stator structure for the hub motor of an electric vehicle, the winding is wound by at least two layers of flat wires.

[0015] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0016] The stator bracket of the utility model is composed of a left bracket, a right bracket and a fixing cylinder. The left bracket and the right bracket can improve the overall strength and toughness of the motor stator, and the designed winding is wound by flat wire, so that the contact area between the wires is increased, the internal gap of the winding is reduced, and the contact between the winding and the stator slot is better, which effectively improves the heat dissipation and thermal conductivity of the motor; at the same time, the end of the copper wire can be shortened, saving copper material in length and reducing production costs; the left bracket is provided with a connecting hole 1 and a connecting cylinder 1, and the right bracket is provided with a connecting cylinder 2 and a connecting hole 2. The left bracket and the right bracket are matched with the connecting hole 1 and the connecting cylinder 2, and the connecting cylinder 1 and the connecting hole 2, respectively, so that the positioning of the two can be completed, and when welding with the fixing cylinder, the left bracket or the right bracket can be prevented from being offset, thereby ensuring the connection stability of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] Figure 2 It is a cross-sectional view of the utility model.

[0019] Figure 3 It is an enlarged view of point A of the present utility model.

[0020] Figure 4 It is an exploded view of the utility model.

[0021] Figure 5 It is an enlarged view of point B of the present utility model.

[0022] Figure 6 It is a structural schematic diagram of the right bracket of the utility model.

[0023] 1- stator bracket; 2- stator core; 3- insulation short plate; 4- winding; 11- left bracket; 12- right bracket; 13- fixing cylinder; 14- water drop-shaped reinforcement groove 1; 15- water drop-shaped reinforcement groove 2; 16- insulation short plate fixing plate; 17- heat dissipation hole; 21- stator slot; 22- winding bracket; 111- connection hole 1; 112- connection cylinder 1;

[0024] 121 - connecting tube 2; 122 - connecting hole 2; 130 - positioning rib; 131 - positioning groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to specific embodiments of the invention:

[0026] like Figure 1-6As shown: A stator structure for an electric vehicle hub motor, comprising a stator bracket 1, a stator core 2, an insulating short plate 3 and a winding 4, wherein the stator core 2 is arranged on the outer peripheral side of the stator bracket 1, and a plurality of stator slots 21 are evenly distributed on the outer peripheral side of the stator core 2, and a winding bracket 22 for winding 4 to surround is arranged between two adjacent stator slots 21, the insulating short plate 3 is two pieces, and is fixed to both sides of the stator core 2 through the stator bracket 1, and the winding 4 is surrounded by the winding bracket 22 and the insulating short plate 3, and the winding 4 is composed of a flat wire, and the stator bracket 1 comprises a left bracket 11, a right bracket 12 and a fixing cylinder 13, and the fixing cylinder 13 is fixed to the left bracket 11 and the right bracket At the middle end of 12, the left bracket 11 is provided with a connecting hole 111 and a connecting tube 112, and the right bracket 12 is provided with a connecting tube 121 used in conjunction with the connecting hole 111 and a connecting hole 122 used in conjunction with the connecting tube 112. The stator bracket is composed of a left bracket, a right bracket and a fixing tube. The left bracket and the right bracket can improve the overall strength and toughness of the motor stator. During installation, the connecting tube 1 is inserted into the connecting hole 2, and the connecting tube 2 is inserted into the connecting hole 1, and the two are transitionally matched. It is worth mentioning that a positioning rib 130 is provided on the outer peripheral side of the stator bracket, and a positioning groove 131 used in conjunction with the positioning rib is provided on the inner side of the stator core and the insulating short plate.

[0027] In the above-mentioned stator structure for the electric vehicle hub motor, the left bracket 11 is formed with a plurality of teardrop-shaped reinforcement grooves 14, and the right bracket 12 is formed with a plurality of teardrop-shaped reinforcement grooves 15. The connecting hole 111 and the connecting tube 112 on the left bracket 11 are located in the teardrop-shaped reinforcement groove 14, and the connecting tube 2 121 and the connecting hole 2 122 on the right bracket 12 are located in the teardrop-shaped reinforcement groove 15. Specifically, this is to improve the strength and toughness of the left bracket and the right bracket.

[0028] In the above-mentioned stator structure for the electric vehicle hub motor, the outer edges of the left bracket 11 and the right bracket 12 are bent upward and outward to form an insulating short plate fixing piece 16. Specifically, the insulating short plate fixing piece is an annular structure, which can fix the insulating short plate on the stator core.

[0029] In the above-mentioned stator structure for the hub motor of an electric vehicle, a plurality of heat dissipation holes 17 are provided on the left bracket 11 and the right bracket 12, specifically, this is to improve the overall heat dissipation performance.

[0030] In the above-mentioned stator structure for the electric vehicle hub motor, the width of the flat wire is 1.5-2.5mm, and the thickness is 0.8-1.2mm. The winding 4 is wound by at least two layers of flat wire. Specifically, the contact area between the wires is increased, and the gap inside the winding is reduced, so that the contact between the winding and the stator slot is better, and the heat dissipation and thermal conductivity of the motor are effectively improved; at the same time, the end of the copper wire can be shortened, saving copper material in length and reducing production costs. The width of the flat wire is preferably 2mm, and the thickness is preferably 1mm.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator structure for an electric vehicle hub motor, characterized in that: The invention comprises a stator support (1), a stator core (2), an insulating short plate (3) and a winding (4); the stator core (2) is arranged on the outer peripheral side of the stator support (1); a plurality of stator slots (21) are evenly distributed on the outer peripheral side of the stator core (2); a winding support (22) for winding (4) to be wound around is arranged between two adjacent stator slots (21); the insulating short plate (3) is composed of two pieces and is fixed to the two side portions of the stator core (2) through the stator support (1); the winding (4) is wound around the winding support (22) and the insulating short plate (3); the winding (4) is composed of a flat wire; the stator support (1) comprises a left support (11), a right support (12) and a fixing cylinder (13); the fixing cylinder (13) is fixed to the middle end portions of the left support (11) and the right support (12).

2. The stator structure for the electric vehicle hub motor according to claim 1, characterized in that: The left bracket (11) is provided with a connecting hole 1 (111) and a connecting tube 1 (112), and the right bracket (12) is provided with a connecting tube 2 (121) used in conjunction with the connecting hole 1 (111) and a connecting hole 2 (122) used in conjunction with the connecting tube 1 (112).

3. The stator structure for the electric vehicle hub motor according to claim 2 is characterized in that: The left bracket (11) is formed with a plurality of teardrop-shaped reinforcement grooves 1 (14), and the right bracket (12) is formed with a plurality of teardrop-shaped reinforcement grooves 2 (15).

4. The stator structure for the electric vehicle hub motor according to claim 3 is characterized in that: The first connection hole (111) and the first connection tube (112) on the left bracket (11) are located in the first water drop-shaped reinforcement groove (14), and the second connection tube (121) and the second connection hole (122) on the right bracket (12) are located in the second water drop-shaped reinforcement groove (15).

5. The stator structure for the electric vehicle hub motor according to claim 1, 2, 3 or 4, characterized in that: The outer edges of the left bracket (11) and the right bracket (12) are bent upward and outward to form insulating short plate fixing pieces (16).

6. The stator structure for the electric vehicle hub motor according to claim 5, characterized in that: A plurality of heat dissipation holes (17) are provided on the left bracket (11) and the right bracket (12).

7. The stator structure for the electric vehicle hub motor according to claim 5, characterized in that: The width of the flat wire is 1.5-2.5 mm, and the thickness is 0.8-1.2 mm.

8. The stator structure for the electric vehicle hub motor according to claim 7, characterized in that: The winding (4) is wound from at least two layers of flat wires.

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