Brushless high-speed hub motor of electric bicycle

Abstract

The utility model relates to the technical field of electric bicycles, in particular to a brushless high-speed hub motor of an electric bicycle, which comprises a motor assembly and a hub assembly arranged on the motor assembly, the motor assembly comprises an outer shell and an end cover, and the end cover is arranged on the outer shell. A plurality of containing grooves are formed in the inner wall of the outer shell, a convex rib is arranged between every two adjacent containing grooves, a plurality of ventilation holes are formed in each convex rib, and the two containing grooves are communicated through the ventilation holes; the containing grooves are formed in the outer shell, the two containing grooves are communicated through the ventilation hole, the dual cooling effect of ventilation and heat conduction is achieved, and the probability of heat accumulation in the shell is greatly reduced; by arranging the arc-shaped protrusions, the situation that the hub or the motor is collided by foreign matter in the running process of the electric bicycle is avoided, and the good protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, and more particularly to a brushless high-speed hub motor for an electric bicycle. Background Art

[0002] Existing hub motors are already relatively common. For example, a hub motor and a hub motor heat dissipation system with the patent number 202010372226.X. For details, please refer to Figure 1 , such as Figure 1 shown, where the hub motor includes a motor shaft 12 and a motor housing 6. A plurality of housing cooling channels are arranged at intervals along the circumferential direction of the motor shaft 12 on the same side of the stator. The housing cooling channel includes a housing liquid inlet channel 16 and a housing liquid outlet channel 17. Both the housing liquid inlet channel 16 and the housing liquid outlet channel 17 extend radially along the motor shaft 12. In order to achieve a good heat dissipation effect, a heat dissipation component is arranged in the housing. The heat dissipation efficiency of this method is relatively low, and only heat conduction is used to achieve the heat dissipation effect. Under long-term use, heat flow accumulation will occur in the housing.

[0003] Therefore, it is necessary to provide a brushless high-speed hub motor for an electric bicycle with a dual heat dissipation effect. Summary of the Utility Model

[0004] The utility model provides a brushless high-speed hub motor for an electric bicycle to solve the above technical problems.

[0005] To achieve the above object, an embodiment of the utility model provides a brushless high-speed hub motor for an electric bicycle, including: a motor assembly and a hub assembly arranged outside the motor assembly. The motor assembly includes an outer housing and an end cover. A plurality of receiving grooves are formed on the inner wall of the outer housing. A rib is provided between two adjacent receiving grooves. A plurality of air exchange holes are formed on the rib. The two receiving grooves are communicated through the air exchange holes.

[0006] Further, the cross-section of the receiving groove is in the shape of a long slot opening. Both sides of the receiving groove have arc-shaped surfaces, and the arc-shaped surfaces are one of the surfaces of the rib.

[0007] Further, a cooling pipe is arranged inside the receiving groove, and a heat dissipation channel is formed between the cooling pipe and the arc-shaped surface.

[0008] Further, the hub assembly includes an outer disk and an outer ring arranged on the edge of the outer disk. The outer disk is fixedly connected to the outer housing. A cavity is formed between the outer disk, the outer housing, and the end cover.

[0009] Further, both sides of the outer ring are adapted to connect to a tire.

[0010] Further, a plurality of weight reduction grooves are formed on the outer disk.

[0011] Further, a support rib is formed between the two weight-reducing grooves.

[0012] Further, a plurality of arc-shaped protrusions are integrally provided on the outer wall of the outer disc.

[0013] Further, the position of the arc-shaped protrusion on the inner wall of the outer disc is a concave groove.

[0014] Further, the arc-shaped protrusion of the outer disc is recessed in the clockwise direction.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] By providing a receiving groove on the outer housing and allowing the two receiving grooves to communicate through an air exchange hole, the dual cooling effects of air exchange and heat conduction are achieved, greatly reducing the probability of heat accumulation in the housing;

[0017] By providing arc-shaped protrusions, foreign objects are prevented from bouncing and hitting the wheel hub or the motor during the running of the electric bicycle, achieving a good protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 is a schematic structural diagram of a hub motor in the prior art;

[0020] Figure 2 is a perspective view of the optimal embodiment of a brushless high-speed hub motor of an electric bicycle according to the present utility model;

[0021] Figure 3 is a schematic structural diagram of the optimal embodiment of the hub assembly of the present utility model;

[0022] Figure 4 is a perspective view of the optimal embodiment of the outer housing of the present utility model.

[0023] Among them, 1, motor assembly; 11, outer housing; 12, end cover; 13, receiving groove; 14, convex rib; 15, arc surface; 16, air exchange hole; 2, hub assembly; 21, outer ring; 22, outer disc; 23, weight-reducing groove; 24, arc-shaped protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, and therefore only showing the components related to the present utility model.

[0025] Please refer to Figure 2 , Figure 2This is a perspective view of the optimal embodiment of a brushless high-speed hub motor for an electric bicycle of the present utility model. As Figure 2 shown, at least one embodiment provides a brushless high-speed hub motor for an electric bicycle, including: a motor assembly 1 and a hub assembly 2 provided on the motor assembly 1.

[0026] Motor assembly 1

[0027] Please continue to refer to Figure 2 and in combination with Figure 4 , Figure 4 This is a perspective view of the optimal embodiment of the outer housing of the present utility model. As Figure 2 and Figure 4 shown, the motor assembly 1 includes an outer housing 11 and an end cover 12. A plurality of receiving grooves 13 are formed in the inner wall of the outer housing 11. The inside of the receiving grooves 13 is used to place cooling pipes. It should be additionally supplemented that the outer wall of the cooling pipe is fixedly connected to the inner wall of one of the planes of the receiving groove and has a certain gap with the other inner walls; between two adjacent receiving grooves 13 is a rib 14, and the rib 14, that is, a reinforcing rib, is used to make the housing have a better impact resistance effect. A plurality of air exchange holes 16 are formed in the rib 14, and the two receiving grooves 13 are communicated through the air exchange holes 16. The cross-section of the receiving groove 13 is in the shape of a long slot opening, and both sides of the receiving groove 13 have arc-shaped surfaces 15, and the arc-shaped surfaces 15 are one of the surfaces of the rib 14. A cooling pipe is arranged inside the receiving groove 13, and a heat dissipation channel is formed between the cooling pipe and the arc-shaped surface 15. The cooling pipe contacts with the hot air flow to take away heat, and the heat dissipation channel directly takes away heat through air flow exchange; realizing the dual cooling effects of air exchange and heat conduction, and greatly reducing the probability of heat accumulation inside the housing.

[0028] Hub assembly 2

[0029] Please continue to refer to Figure 2 and in combination with Figure 3 , Figure 3 This is a structural schematic diagram of the optimal embodiment of the hub assembly of the present utility model. As Figure 2 and Figure 3As shown, the hub assembly 2 includes an outer disc 22 and an outer ring 21 provided at the edge of the outer disc 22. The outer ring 21 is used to connect the tire. One of the end caps of the motor housing is composed of a part of the outer disc 22. The outer disc 22 is fixedly connected to the outer housing 11. A cavity is formed among the outer disc 22, the outer housing 11 and the end cap 12. The two side edges of the outer ring 21 are adapted to connect the tire. A plurality of weight-reducing grooves 23 are formed in the outer disc 22, enabling the hub to achieve a good supporting effect under relatively light weight conditions. A plurality of arc-shaped protrusions 24 are integrally provided on the outer wall of the outer disc 22. The positions of the arc-shaped protrusions 24 on the inner wall of the outer disc 22 are concave grooves. The arc-shaped protrusions 24 on the outer disc 22 are recessed in the clockwise direction. When the electric vehicle is running, the arc-shaped protrusions 24 can play a role in blocking first when there are foreign objects bouncing, avoiding direct impact on the motor housing and reducing the probability of motor damage.

[0030] In summary, by providing the receiving grooves 13 on the outer housing 11 and connecting the two receiving grooves 13 through the ventilation holes 16, the dual cooling effects of ventilation and heat conduction are achieved, greatly reducing the probability of heat accumulation in the housing; by providing the arc-shaped protrusions 24, foreign objects bouncing during the running of the electric bicycle are prevented from hitting the hub or the motor, achieving a good protection effect.

[0031] Enlightened by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A brushless high-speed hub motor for an electric bicycle, characterized in that: include: A motor assembly (1) and a hub assembly (2) arranged on the motor assembly (1), wherein the motor assembly (1) comprises an outer shell (11) and an end cover (12), wherein the inner wall of the outer shell (11) is provided with a plurality of receiving grooves (13), a convex rib (14) is provided between two adjacent receiving grooves (13), a plurality of ventilation holes (16) are provided on the convex rib (14), and the two receiving grooves (13) are connected via the ventilation holes (16).

2. The brushless high-speed hub motor for an electric bicycle as claimed in claim 1, characterized in that: The cross section of the receiving groove (13) is in the shape of a long slot, and both sides of the receiving groove (13) have arcuate surfaces (15), and the arcuate surface (15) is one side of the convex rib (14).

3. The brushless high-speed hub motor for an electric bicycle as claimed in claim 2, characterized in that: A cooling pipe is arranged inside the containing groove (13), and a heat dissipation channel is formed between the cooling pipe and the arc-shaped surface (15).

4. The brushless high-speed hub motor for an electric bicycle as claimed in claim 1, characterized in that: The wheel hub assembly (2) comprises an outer disc (22) and an outer ring (21) arranged at the edge of the outer disc (22); the outer disc (22) is fixedly connected to the outer shell (11); and a cavity is formed between the outer disc (22), the outer shell (11) and the end cover (12).

5. The brushless high-speed hub motor for an electric bicycle as claimed in claim 4, characterized in that: The two side edges of the outer ring (21) are suitable for connecting a tire.

6. The brushless high-speed hub motor for an electric bicycle as claimed in claim 5, characterized in that: The outer plate (22) is provided with a plurality of weight-reducing grooves (23).

7. The brushless high-speed hub motor for an electric bicycle as claimed in claim 6, characterized in that: A supporting rib is formed between the two weight-reducing grooves (23).

8. The brushless high-speed hub motor for an electric bicycle as claimed in claim 5, characterized in that: A plurality of arc-shaped protrusions (24) are integrally arranged on the outer wall of the outer disk (22).

9. The brushless high-speed hub motor for an electric bicycle as claimed in claim 8, characterized in that: The position of the arc-shaped protrusion (24) on the inner wall of the outer disk (22) is a concave groove.

10. The brushless high-speed hub motor for an electric bicycle as claimed in claim 9, characterized in that: The arc-shaped protrusion (24) of the outer disk (22) is recessed in the clockwise direction.

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