CN219295621U - Hub shell, outer rotor hub motor and electric bicycle - Google Patents

Abstract

The application relates to a hub shell, an outer rotor hub motor and an electric bicycle. The hub shell includes: the hub wheel is positioned at the radial outer side of the outer rotor, at least one drainage through hole which is penetrated along the radial direction of the hub wheel is arranged on the hub wheel, and at least one elastic structure is arranged in the drainage through hole; each elastic structure comprises at least one elastic piece, one end of the elastic piece is a fixed end and is connected with the hole wall of the drainage through hole, and the other end of the elastic piece is a free end; the elastic piece is provided with a closed state and an open state, and the form of the elastic structure can cause the drainage through hole to be blocked when the elastic piece is in the closed state; the form of the elastic structure can enable the drainage through hole to circulate when the elastic piece is in an open state. If water enters the outer rotor hub motor, when the outer rotor hub motor operates, the elastic piece is switched from a closed state to an open state under the action of centrifugal force, and the water is discharged from the water discharge through hole. When the outer rotor hub motor stops running, the elastic piece is in a closed state, and the elastic structure can prevent the outer rotor hub motor from water inflow.

Description

Hub shell, outer rotor hub motor and electric bicycle

Technical Field

The application relates to the technical field of hub motors, in particular to a hub shell, an outer rotor hub motor and an electric bicycle.

Background

The shared electric bicycle is convenient for people to travel, but is often treated by rough storm and damaged due to personal property of non-users. Moreover, the work environment of the shared electric bicycle is usually parked in the open air. When the bicycle meets rainy weather or is parked in a ponding region, water inflow of the hub motor of the shared electric bicycle easily occurs, so that the bicycle cannot be used.

Disclosure of Invention

Based on this, it is necessary to provide a wheel hub shell, an external rotor wheel hub motor, an electric bicycle, which are necessary to solve the technical problem that the wheel hub motor of the shared electric bicycle is easy to enter water when encountering rainy weather or being parked in a water accumulation area, which results in the situation that the shared electric bicycle cannot be used in the prior art.

A hub shell disposed outside an outer rotor of an outer rotor hub motor, the hub shell comprising: the hub ring is positioned at the radial outer side of the outer rotor, at least one drainage through hole penetrating along the radial direction of the hub ring is formed in the hub ring, and at least one elastic structure is arranged in the drainage through hole; each elastic structure comprises at least one elastic piece, one end of each elastic piece is a fixed end and is connected with the hole wall of the drainage through hole, and the other end of each elastic piece is a free end; the elastic piece is provided with a closed state and an open state, and the form of the elastic structure can cause the drainage through hole to be blocked when the elastic piece is in the closed state; the form of the elastic structure can enable the drainage through hole to circulate when the elastic piece is in an open state; the elastic member is switchable from a closed state to an open state when subjected to a force radially outwardly of the hub wheel; the elastic member is capable of switching from an open state to a closed state by its elastic restoring force when the radially outward force of the hub wheel is removed.

In an embodiment, each elastic structure comprises at least two elastic pieces sequentially arranged along the circumferential direction of the drainage through hole; when the at least two elastic pieces are in a closed state, the free ends of the at least two elastic pieces are folded towards the center of the drainage through hole, and the adjacent elastic pieces are in sealing fit; when the at least two elastic pieces are switched from the closed state to the open state, the free ends of the at least two elastic pieces are shifted from the center of the drainage through hole to the hole wall direction.

In an embodiment, when the elastic member is in the closed state, the free end of the elastic member is further downstream than the fixed end in the water outlet direction of the water discharge through hole.

In an embodiment, a plurality of drainage through holes are formed in the hub ring at intervals along the circumferential direction of the hub ring, and each drainage through hole is internally provided with a corresponding elastic structure.

In an embodiment, the hub shell further comprises a drain pipe, the drain pipe is arranged in the corresponding drain through hole, and the outer wall of the drain pipe is in sealing fit with the hole wall of the drain through hole; the elastic structure is arranged in the corresponding drain pipe, and the fixed end of the elastic piece is connected with the inner wall of the drain pipe.

In an embodiment, the elastic structure and the drain pipe are made of the same material and are integrally formed.

In an embodiment, the drainage through hole is a stepped hole and comprises a first hole and a second hole which are communicated, the inner diameter of the first hole is larger than that of the second hole, so that a step surface is formed at the joint of the hole wall of the first hole and the hole wall of the second hole, and the drainage pipe is arranged in the first hole.

In an embodiment, a plurality of elastic structures are arranged in each drainage through hole in sequence in the axial direction.

An external rotor hub motor comprising a hub shell as claimed in any one of the preceding claims.

An electric bicycle includes the outer rotor hub motor.

According to the hub shell, the outer rotor hub motor and the electric bicycle, one end of the elastic piece is the fixed end and is connected with the hole wall of the drainage through hole, and the other end of the elastic piece is the free end, so that when the elastic piece is subjected to external force to generate elastic deformation, the free end of the elastic piece shifts, and the elastic structure can be switched between the open state and the closed state. If water enters the outer rotor hub motor, the hub shell rotates synchronously with the outer rotor when the outer rotor hub motor runs, and the water impacts the elastic piece under the action of centrifugal force, so that the elastic piece is subjected to impact force outwards along the radial direction of the hub wheel 110, and meanwhile, under the action of the centrifugal force of the elastic piece, the elastic piece is switched from a closed state to an open state, and water is discharged from the outer rotor hub motor through the water discharge through hole. When the outer rotor hub motor stops running, the elastic piece is not acted by the external force along the radial direction of the hub wheel and is in a closed state, so that the inside of the outer rotor hub motor is isolated from water in the external environment by the elastic structure, and the water inlet of the outer rotor hub motor can be prevented.

Drawings

Fig. 1 is a schematic structural diagram of an external rotor hub motor according to an embodiment.

Fig. 2 is a cross-sectional view of the hub shell at the drain through hole in a closed state of the elastic member of an embodiment.

Fig. 3 is a cross-sectional view of the hub shell at the drain through hole in the open state of the elastic member of fig. 2.

Fig. 4 is a schematic diagram illustrating a connection relationship between a drain pipe and an elastic structure according to an embodiment.

Fig. 5 is a schematic diagram illustrating a connection relationship between a drain pipe and an elastic structure according to another embodiment.

Fig. 6 is a schematic structural view of a hub wheel according to yet another embodiment.

Reference numerals illustrate: 10. an outer rotor hub motor; 100. a hub shell; 110. a hub wheel; 111. a drainage through hole; 1111. a first hole; 1112. a second hole; 1113. a step surface; 120. an elastic structure; 121. an elastic member; 1211. a fixed end; 1212. a free end; 130. and (5) a water drain pipe.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, an embodiment of the present application provides an outer rotor hub motor 10. The outer rotor hub motor 10 includes a hub shell 100, an outer rotor (not shown), and an inner stator (not shown). The outer rotor and the inner stator are both disposed inside the hub shell 100. Hub shell 100 is fixedly coupled to and rotates synchronously with the outer rotor. The hub shell 100 may be the hub shell 100 in any of the following embodiments.

Referring to fig. 1 to 3, an embodiment of the present application provides a hub shell 100. Hub shell 100 includes a hub wheel 110 located radially outward of the outer rotor. The hub wheel 110 is provided with at least one drain through hole 111 penetrating in the radial direction thereof. At least one elastic structure 120 is provided in the drainage through hole 111. Each elastic structure 120 includes at least one elastic member 121, one end of the elastic member 121 is a fixed end 1211 and connected to the wall of the drainage through hole 111, and the other end is a free end 1212. The elastic member 121 has a closed state and an open state. When the elastic member 121 is in the closed state, the shape of the elastic structure 120 can cause the drainage through hole 111 to be blocked; when the elastic member 121 is in the open state, the elastic structure 120 is configured to allow the drainage through hole 111 to circulate. The elastic member 121 is capable of switching from the closed state to the open state when receiving an outward force in the radial direction of the hub wheel 110; when the radially outward force of the hub wheel 110 is removed, the elastic member 121 can be switched from the open state to the closed state by its elastic restoring force.

In the hub shell 100, since one end of the elastic member 121 is the fixed end 1211 and is connected to the wall of the drainage through hole 111, and the other end is the free end 1212, when the elastic member 121 is elastically deformed by an external force, the free end 1212 is displaced, so that the elastic structure 120 can be switched between the open state and the closed state. If water is supplied into the outer rotor hub motor 10, the hub shell 100 rotates synchronously with the outer rotor when the outer rotor hub motor 10 is operated, and the water impacts the elastic member 121 under the centrifugal force, so that the elastic member 121 is subjected to an impact force outwards along the radial direction of the hub wheel 110, and meanwhile, under the centrifugal force of the elastic member 121 itself, the elastic member 121 is switched from a closed state to an open state, so that the water is discharged from the water discharge through hole 111 to the outer rotor hub motor 10. When the outer rotor hub motor 10 stops operating, the elastic member 121 is not subjected to an outward force in the radial direction of the hub wheel 110 and is in a closed state, so that the elastic structure 120 isolates the interior of the outer rotor hub motor 10 from water in the external environment, and further, the outer rotor hub motor 10 can be prevented from water inflow.

Referring to fig. 2 to 5, in some embodiments, each elastic structure 120 includes at least two elastic members 121 sequentially arranged along the circumference of the drainage through hole 111. The number of elastic members 121 in each elastic structure 120 is, for example, two, three, four, five, six, etc.

When the at least two elastic members 121 in the elastic structure 120 are in the closed state, the free ends 1212 of the at least two elastic members 121 are folded toward the center of the drainage through hole 111, and the adjacent elastic members 121 are in sealing fit, so that the drainage through hole 111 is blocked. When the at least two elastic members 121 in the elastic structure 120 are switched from the closed state to the open state, the free ends 1212 of the at least two elastic members 121 are displaced from the center of the drainage through hole 111 toward the hole wall direction, thereby allowing the drainage through hole 111 to circulate.

In other embodiments, the elastic structure may comprise an elastic member. When the elastic piece is in a closed state, the free end of the elastic piece is in sealing fit with the hole wall of the drainage through hole, so that the drainage through hole can be blocked. When the elastic piece is switched from the closed state to the open state, the free end of the elastic piece is shifted, so that a gap is formed between the free end of the elastic piece and the wall of the drainage through hole, and the drainage through hole is enabled to circulate.

Referring to fig. 2 to 3, in some embodiments, when the elastic member 121 is in the closed state, the free end 1212 of the elastic member 121 is located further downstream than the fixed end 1211 in the water outlet direction of the water outlet hole 111, i.e. the free end 1212 of the elastic member 121 is inclined to the outside of the hub 110 with respect to the fixed end 1211 as viewed along the radial direction of the hub 110. In this way, when the external rotor hub motor 10 is in operation, water hits the elastic member 121 under the centrifugal force, and at the same time, the elastic member 121 is more easily switched from the closed state to the open state under the centrifugal force of the elastic member 121 itself, so that water is more easily discharged from the drain through hole 111. Moreover, if the water in the external environment enters the drainage through hole 111 and is located outside the elastic member 121, the force of the water in the external environment on the elastic member 121 is smaller, so that the free ends 1212 of the at least two elastic members 121 are gathered more (or the elastic member 121 is pressed more tightly with the hole wall of the drainage through hole 111), thereby making the elastic structure 120 closed more tightly and having better waterproof effect.

In other embodiments, the elastic member may be perpendicular to the wall of the drain through hole and perpendicular to the radial direction of the hub ring when the elastic member is in the closed state. Therefore, when the outer rotor hub motor is in operation, water in the hub shell impacts the elastic piece under the action of centrifugal force, and the elastic piece can be switched from a closed state to an open state, so that the water is discharged.

Referring to fig. 1, in an embodiment, a plurality of drainage through holes 111 are formed on the hub 110 at intervals along the circumferential direction, and a corresponding elastic structure 120 is disposed in each drainage through hole 111. The number of the drain through holes 111 is, for example, two, three, or the like.

In other embodiments, the number of drain through holes may be one.

Referring to fig. 2 and 3, in one embodiment, the hub shell 100 further includes a drain pipe 130. The drain pipes 130 are disposed in the corresponding drain through holes 111, and the outer walls of the drain pipes 130 are in sealing fit with the walls of the drain through holes 111. The elastic structure 120 is disposed in the corresponding drain pipe 130, and the fixed end 1211 of the elastic member 121 is connected to the inner wall of the drain pipe 130, so that the fixed end 1211 of the elastic member 121 is indirectly connected to the wall of the drain through hole 111. By arranging the elastic structure 120 in the corresponding drain pipe 130 and then arranging the drain pipe 130 in the corresponding drain through hole 111, the elastic structure 120 is indirectly arranged in the corresponding drain through hole 111, and thus the assembly of the elastic structure 120 can be facilitated.

In an embodiment, the elastic structure 120 and the drain pipe 130 are made of the same material and are integrally formed, for example, a silicone material. The elastic structure 120 and the drain pipe 130 are integrally formed by adopting the same material, and then the drain pipe 130 is placed in the drain through hole 111, so that the assembly of the elastic structure 120 is convenient.

In an embodiment, the drainage through hole 111 may be a round hole, a square hole, or the like.

Referring to fig. 4 and 5, in some embodiments, the drain pipe 130 corresponds to the drain through hole 111 in shape, and may be a round pipe or a square pipe.

Referring to fig. 6, in some embodiments, the drainage through hole 111 is a stepped hole, and includes a first hole 1111 and a second hole 1112 that are in communication. The inner diameter of the first hole 1111 is larger than the inner diameter of the second hole 1112 so that a junction of the wall of the first hole 1111 and the wall of the second hole 1112 forms a step surface 1113. A drain pipe 130 is disposed in the first hole 1111. So designed, when installing drain pipe 130, only need with drain pipe 130 from first hole 1111 deviate from one side of second hole 1112 and pack into in first hole 1111, step face 1113 can carry out spacingly to drain pipe 130, prevent drain pipe 130 from removing from second hole 1112, at this moment, only need again through glue the mode such as gluing to drain pipe 130 deviate from one side of step face 1113 spacing can, make things convenient for drain pipe 130's assembly, make things convenient for elastic construction 120's assembly promptly. The first hole 1111 may be located outside the second hole 1112 or inside the second hole 1112 in the radial direction of the hub 110.

Referring to fig. 2 and 3, in some embodiments, a plurality of elastic structures 120, such as two, three, four, etc., are disposed in each of the drainage through holes 111 in sequence along the axial direction of the drainage through holes 111. Thus, the layer-by-layer water prevention can be performed through the plurality of elastic structures 120, and the water prevention effect is better.

In one embodiment, the surfaces of the rust-prone components (e.g., stator, iron ring, magnetic steel, etc.) inside the outer rotor hub motor 10 are provided with waterproof glue, so that these components have waterproof capability.

An embodiment of the present application also provides an electric bicycle. The electric bicycle includes the outer rotor hub motor 10 in any of the embodiments described above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A hub shell disposed outside an outer rotor of an outer rotor hub motor, the hub shell comprising: the hub ring is positioned at the radial outer side of the outer rotor, at least one drainage through hole penetrating along the radial direction of the hub ring is formed in the hub ring, and at least one elastic structure is arranged in the drainage through hole; each elastic structure comprises at least one elastic piece, one end of each elastic piece is a fixed end and is connected with the hole wall of the drainage through hole, and the other end of each elastic piece is a free end; the elastic piece is provided with a closed state and an open state, and the form of the elastic structure can cause the drainage through hole to be blocked when the elastic piece is in the closed state; the form of the elastic structure can enable the drainage through hole to circulate when the elastic piece is in an open state; the elastic member is switchable from a closed state to an open state when subjected to a force radially outwardly of the hub wheel; the elastic member is capable of switching from an open state to a closed state by its elastic restoring force when the radially outward force of the hub wheel is removed.

2. The hub shell according to claim 1, wherein each of the elastic structures includes at least two elastic members arranged in sequence along a circumferential direction of the drain through hole; when the at least two elastic pieces are in a closed state, the free ends of the at least two elastic pieces are folded towards the center of the drainage through hole, and the adjacent elastic pieces are in sealing fit; when the at least two elastic pieces are switched from the closed state to the open state, the free ends of the at least two elastic pieces are shifted from the center of the drainage through hole to the hole wall direction.

3. The hub shell according to claim 1, wherein the free end of the elastic member is further downstream than the fixed end in the water outlet direction of the water discharge through hole in the closed state.

4. A hub shell according to claim 1, wherein said hub ring is provided with a plurality of said drain through holes arranged at intervals along the circumferential direction thereof in the circumferential direction of said hub ring, each of said drain through holes being provided with a corresponding one of said elastic structures.

5. The hub shell according to claim 1, further comprising a drain pipe disposed within the corresponding drain through hole, an outer wall of the drain pipe being in sealing engagement with a wall of the drain through hole; the elastic structure is arranged in the corresponding drain pipe, and the fixed end of the elastic piece is connected with the inner wall of the drain pipe.

6. The hub shell of claim 5 wherein said resilient structure is formed of the same material as said drain tube and is integrally formed therewith.

7. The hub shell according to claim 5, wherein the drain through hole is a stepped hole including a first hole and a second hole that are communicated, an inner diameter of the first hole being larger than an inner diameter of the second hole so that a junction of a wall of the first hole and a wall of the second hole forms a stepped surface, and the drain pipe is disposed in the first hole.

8. The hub shell according to claim 1, wherein a plurality of elastic structures are provided in each of the drain through holes in an axially sequential arrangement thereof.

9. An external rotor hub motor comprising the hub shell according to any one of claims 1 to 8.

10. An electric bicycle comprising the outer rotor hub motor of claim 9.

Images