CN-224204847-U - From magnet steel circle of taking guiding gutter and have in-wheel motor of this magnet steel circle

Abstract

A magnetic steel ring with a diversion trench and a hub motor with the magnetic steel ring belong to the technical field of wheel power transmission. A magnetic steel ring with diversion trenches is provided, and the diversion trenches are arranged on the inner wall of one side of the outer rotor magnetic steel ring along the circumferential direction. The motor forms an oil suspension storage circulation cold oil chamber motor working chamber, and the motor working chamber and the oil suspension storage circulation cold oil chamber are mutually communicated to form a cooling oil circulation heat dissipation system. The utility model has the advantages that the diversion trench has a certain width and depth, when the motor works, the oil in the motor cavity can be discharged from a high position to the lower position of the diversion trench on the inner wall of the magnetic steel ring, the oil in the motor air gap is smoothly discharged, the oil resistance can not be generated in the motor air gap and the motor cavity, the pressure of the rotating stirring oil in the motor can be effectively released, and the motor performance is greatly improved.

Inventors

• LI MIANJUN
• YUAN CHANGAN
• YANG XIWU
• TANG HONG
• KANG HUI
• LIU JUN
• XIE MINGJIANG
• LI HONGBING

Assignees

• 李绵军

Dates

Publication Date

20260505

Application Date

20250502

Claims (7)

1. 1. A magnetic steel ring with diversion trenches is characterized in that the diversion trenches (2.1) are formed in the inner wall of one side of an outer rotor magnetic steel ring (2) along the circumferential direction.
2. 2. The magnetic steel ring with the diversion trench according to claim 1, wherein the diversion trench (2.1) is 5-25 mm in width and 2-6 mm in depth.
3. 3. The magnetic steel ring with the diversion trench according to claim 1, wherein the cross section of the diversion trench (2.1) adopts a U-shaped structure (2.11), a whole body structure (2.12), a V-shaped structure (2.13) or a trapezoid structure (2.14).
4. 4. A hub motor with a magnetic steel ring with a diversion trench comprises a motor and a hub steel ring (1), wherein the motor comprises a motor shaft (6), a stator (11) and an outer rotor magnetic steel ring (2), the hub steel ring (1) is fixedly connected with the outer rotor magnetic steel ring (2), the outer rotor magnetic steel ring (2) is sleeved on the stator (11), one end of the outer rotor magnetic steel ring (2) is fixedly connected with a motor left cover (5), the other end of the outer rotor magnetic steel ring is fixedly connected with a motor drum cover (13), the hub motor is characterized in that the outer rotor magnetic steel ring (2) is provided with the diversion trench (2.1), the diversion trench (2.1) is located on the inner wall of the outer rotor magnetic steel ring (2) close to one side of the motor left cover (5), a cooling oil separation circulation cover (3) is installed in the motor left cover (5), a space formed by surrounding one end inner wall of the outer rotor magnetic steel ring (2) and one side of the diversion trench (2.1) and one side of the cooling oil separation circulation cover (3) forms an oil suspension storage circulation cooling oil chamber (4), the other end inner wall of the outer rotor magnetic steel ring (2), the motor drum cover (13) and the motor shaft (6) and the cooling oil separation circulation cover (3) form a motor space (12) which is formed by the motor, and the cooling oil suspension circulation system (12) and the cooling oil circulation system is communicated with each other.
5. 5. The hub motor with the magnetic steel ring with the diversion trench as claimed in claim 4, wherein the circumferential position of the cooling oil separating and circulating cover (3) is provided with an oil drain groove (3.1), and the oil drain groove (3.1) is matched with the diversion trench (2.1).
6. 6. The in-wheel motor with the magnetic steel ring with the diversion trench as claimed in claim 4, wherein the cooling oil separating circulation cover (3) is provided with an oil scooping and pouring block (3.2) along the circumferential direction at one side.
7. 7. The hub motor with the magnetic steel ring with the diversion trench as claimed in claim 6, wherein the oil spraying hole (3.3) is arranged beside the oil scooping perfusion block (3.2).

Description

From magnet steel circle of taking guiding gutter and have in-wheel motor of this magnet steel circle Technical Field A magnetic steel ring with a diversion trench and a hub motor with the magnetic steel ring belong to the technical field of wheel power transmission, and particularly relate to a wheel power transmission device of an electric motorcycle and an electric bicycle. Background At present, the oil in a motor cavity of a common oil-cooled motor of an electric vehicle on the market is discharged to a space formed by the inner wall of the magnetic steel ring of the outer rotor. Because the inner walls at two ends of the outer rotor magnetic steel ring are planes, the space formed by the inner walls of the outer rotor magnetic steel ring is a narrow flat space, when the motor rotates, oil in the motor cavity discharged outwards from the outer rotor magnetic steel ring is not contained in enough space, the oil can be stirred and splashed in the flat space of the outer rotor magnetic steel ring, the oil hydraulic force in the flat space cannot be timely and effectively released, the oil can be detained in the motor air gap and cannot be smoothly discharged, the oil in the motor air gap and the oil stirred and splashed in the flat space of the magnetic steel ring can easily generate rotational resistance, and the rotational resistance can cause extra electricity consumption of the motor, so that the endurance mileage of the motor is reduced. Along with the running of the motor, the temperature is continuously increased, the thermal expansion gas pressure can be quickly generated in the flat space, and the air pressure of the thermal expansion gas pressure is discharged to the outside and simultaneously discharged together with oil, so that the problem of oil spilling and oil leakage can be generated, and the energy waste and the motor performance are reduced. In order to solve the problem, the specification of the integral cover of the hub motor and the hub motor with the integral cover disclosed by the patent number ZL202121834110.X is described on page 3 of the specification, wherein a first convex ring 3.6 is arranged at the circumferential edge of the cover body 3, an outer ring opening of the first convex ring 3.6 extends upwards and is bent to form a second convex ring 3.4, and a diversion trench 3.5 is arranged between the first convex ring 3.6 and the second convex ring 3.4 and at the position of the oil drain groove 3.3. The pressure that this guiding gutter's setting makes rotatory stirring fluid in the motor can effectively release, and the fluid in the motor air gap is discharged very easily when realizing fluid circulative cooling to motor air gap and motor intracavity can not produce the oil resistance, and the oil extraction is unobstructed, makes the electric motor car operation steady, runs more far. The motor has the defects that the diversion trench can be arranged only by changing the structure of the motor or adding parts, the structure is complex, the manufacturing procedures are more, and the manufacturing cost is higher. Disclosure of Invention The utility model aims to solve the problems of providing an outer rotor magnetic steel ring with a simplified structure and an in-wheel motor with the magnetic steel ring. The technical scheme is as follows: a magnetic steel ring with diversion trenches is characterized in that the diversion trenches are formed in the inner wall of one side of the outer rotor magnetic steel ring along the circumferential direction. The width of the diversion trench is 5-25 mm, the depth is 2-6 mm. The cross section of the diversion trench can be U-shaped, whole body-shaped, V-shaped, trapezoid, semicircular and other trench types. The hub motor comprises a motor and a hub steel ring, wherein the motor comprises a motor shaft, a stator and an outer rotor magnetic steel ring, the hub steel ring is fixedly connected with the outer rotor magnetic steel ring, the outer rotor magnetic steel ring is sleeved on the stator, one end of the outer rotor magnetic steel ring is fixedly connected with a motor left cover, and the other end of the outer rotor magnetic steel ring is fixedly connected with a motor drum cover. The cooling oil circulation cover is arranged in the motor left cover, the space formed by surrounding the inner wall of one end of the motor left cover and the outer rotor magnetic steel ring and one side of the cooling oil circulation cover forms an oil suspension storage circulation cooling oil chamber, the space formed by surrounding the other end of the outer rotor magnetic steel ring, the motor drum cover, the motor shaft and the other side of the cooling oil separation circulation cover forms a motor working chamber, and the motor working chamber and the oil suspension storage circulation cooling oil chamber are mutually communicated to form a cooling oil circulation heat dissipation system. The circumference position of the cooling oil separatin