Disc brake cover assembly and outer rotor hub motor

Abstract

The utility model belongs to the technical field of electric two-wheeled vehicles, and discloses a disc brake cover assembly and an outer rotor hub motor. The disc brake cover assembly comprises a disc brake end cover, an oil seal and a protective cover, the disc brake end cover is used for being connected with a hub of the outer rotor hub motor, the disc brake end cover is provided with an installation hole for a motor shaft of the outer rotor hub motor to penetrate through, the motor shaft is sleeved with the oil seal and installed in the installation hole, and the motor shaft is sleeved with the protective cover. The protection cover is installed in the installation hole through a buckle structure and located on the outer side of the oil seal in the axial direction of the motor shaft. According to the disc brake cover assembly, dust, water and impurities can be prevented from entering the oil seal, external foreign matter is prevented from directly impacting the oil seal, it is guaranteed that the oil seal cannot move or loosen in the working process, and the service life of the oil seal is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electric two-wheeled vehicle technology, and in particular to a disc brake cover assembly and an external rotor hub motor. Background Technology

[0002] With the increasing popularity of electric two-wheelers and their use in various scenarios, the waterproof and dustproof properties of liquid-cooled external rotor hub motors, which serve as the drive source for two-wheeled electric vehicles, have become a key consideration for consumers. Environmental factors and frequency of use can cause wear and tear on the motor's oil seals, leading to water ingress, rust, and malfunction.

[0003] Existing two-wheeled vehicles typically use liquid-cooled external rotor hub motors. The oil seal is usually installed on the disc brake end cap connected to the hub. In actual operation, after long-term use, the oil seal will fail due to wear from external foreign objects, thereby increasing the failure rate of the motor.

[0004] In conclusion, there is an urgent need to propose a component structure to improve the service life of oil seals. Utility Model Content

[0005] The first objective of this invention is to provide a disc brake cover assembly that reduces the entry of dust, moisture, and impurities into the oil seal, prevents external foreign objects from directly impacting the oil seal, ensures that the oil seal will not shift or loosen during operation, and extends its service life.

[0006] The second objective of this invention is to provide an external rotor hub motor that can prevent external foreign objects from directly impacting the oil seal, ensuring that the oil seal will not shift or loosen during operation, reducing the probability of the motor rusting and failing to start due to oil seal failure, and extending the service life of the external rotor hub motor.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model discloses a disc brake cover assembly, comprising: a disc brake end cover for connecting to the hub of an external rotor hub motor, and the disc brake end cover having a mounting hole for the motor shaft of the external rotor hub motor to pass through; an oil seal, the oil seal being sleeved on the motor shaft and installed in the mounting hole; and a protective cover, the protective cover being sleeved on the motor shaft, the protective cover being installed in the mounting hole by a snap-fit ​​structure, and being located outside the oil seal along the axial direction of the motor shaft.

[0009] In some embodiments, the snap-fit ​​structure includes a slot and a protrusion, one of the slot and the protrusion is provided on the outer peripheral wall of the protective cover, and the other of the slot and the protrusion is provided on the inner sidewall of the mounting hole.

[0010] In some specific embodiments, there are multiple card protrusions and card slots, which are spaced apart circumferentially along the mounting hole.

[0011] In some specific embodiments, the card protrusion is formed as an annular protrusion extending circumferentially along the mounting hole, and the card groove is formed as an annular groove extending axially along the mounting hole.

[0012] In some embodiments, the protective cover is provided with a seal on the side facing the oil seal.

[0013] In some specific embodiments, the protective cover has a mounting groove on the side facing the oil seal, and the seal is filled in the mounting groove.

[0014] In some embodiments, a stop ring is provided in the mounting hole, and the side of the oil seal opposite to the protective cover abuts against the stop ring.

[0015] In some embodiments, the disc brake end cap is provided with a plurality of fixing holes along its circumference, and the mounting member passes through the fixing holes and is connected to the wheel hub to install the disc brake end cap on the wheel hub.

[0016] This utility model also discloses an external rotor hub motor, including a motor assembly, a hub, a motor shaft, a disc brake pump, and the disc brake cover assembly described above. The hub is connected to the rotor of the motor assembly, the motor shaft is connected to the stator of the motor assembly, the disc brake cover assembly is mounted on the hub, and the disc brake pump is connected to the motor shaft.

[0017] In some embodiments, the external rotor hub motor further includes a disc brake bracket, which is sleeved on the motor shaft and locked by a locking member, and the disc brake pump is mounted on the disc brake bracket.

[0018] The beneficial effects of this disc brake cover assembly are as follows: During actual assembly, after the oil seal is installed into the mounting hole, the protective cover is then installed into the mounting hole. Because the protective cover is secured in the mounting hole via a snap-fit ​​structure, it can be stably installed without easily shifting. Furthermore, since the protective cover is located on the outside of the oil seal, it reduces the entry of dust, moisture, and impurities into the oil seal, preventing external foreign objects from directly impacting the oil seal and ensuring that the oil seal will not shift or loosen during operation, thus extending its service life.

[0019] The beneficial effects of the disc brake cover assembly of this utility model are as follows: Due to the disc brake cover assembly described above, the external rotor hub motor can prevent external foreign objects from directly impacting the oil seal, ensuring that the oil seal will not shift or loosen during operation, and reducing the probability of the motor rusting and failing to start due to oil seal failure.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the disc brake cover assembly according to an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 A magnified diagram showing point A (circled).

[0023] Figure 3 This is a schematic diagram of the structure of the protective cover according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the oil seal according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the external rotor hub motor according to an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of the external rotor hub motor according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Disc brake end cap; 110. Mounting hole; 120. Slot; 130. Stop ring; 140. Fixing hole;

[0029] 200. Oil seal;

[0030] 300. Protective cover; 310. Clip protrusion; 320. Mounting slot;

[0031] 400. Seals;

[0032] 500, Wheel hub; 600, Motor shaft; 700, Motor assembly; 800, Disc brake pump; 900, Disc brake bracket; 1000, Locking component. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] This utility model discloses a disc brake cover assembly, see reference. Figure 1 , Figure 2 and Figure 4 As shown, the disc brake cover assembly includes a disc brake end cover 100, an oil seal 200, and a protective cover 300. The disc brake end cover 100 is used to connect to the hub 500 of the external rotor hub motor, and the disc brake end cover 100 is provided with a mounting hole 110 for the motor shaft 600 of the external rotor hub motor to pass through. The oil seal 200 is sleeved on the motor shaft 600 and installed in the mounting hole 110. The protective cover 300 is installed on the motor shaft 600 and is installed in the mounting hole 110 by a snap-fit ​​structure, and is located outside the oil seal 200 along the axial direction of the motor shaft 600. It can be understood that in the actual assembly process, after the oil seal 200 is installed in the mounting hole 110, the protective cover 300 is installed in the mounting hole 110. Because the protective cover 300 is in the mounting hole 110 by a snap-fit ​​structure, the protective cover 300 can be stably installed in the mounting hole 110 and is not easy to shake. Furthermore, since the protective cover 300 is located on the outside of the oil seal 200, it can reduce the entry of dust, moisture and impurities into the oil seal 200, prevent external foreign objects from directly impacting the oil seal 200, ensure that the oil seal 200 will not shift or loosen during operation, and extend its service life.

[0037] Optionally, the snap-fit ​​structure includes a slot 120 and a protrusion 310. The protrusion 310 is provided on the outer peripheral wall of the protective cover 300, and the slot 120 is provided on the inner side wall of the mounting hole 110. It is understood that during actual assembly, after the protective cover 300 is inserted into the mounting hole 110, the protective cover 300 cannot move further inward once the protrusion 310 engages with the slot 120. The mating direction of the slot 120 and the protrusion 310 facilitates the installation and removal of the protective cover 300 and helps ensure the stability of the installation between the protective cover 300 and the disc brake end cap 100.

[0038] Optionally, the protective cover 300 is made of a mixture of PA66 (PA66 is a translucent, white or black crystalline polymeric polyamide resin, the English name is polyamide) and glass fiber. PA66 is heat resistant and has good elasticity. Adding glass fiber can increase strength, ensuring that the protective cover 300 has a certain deformation capacity while preventing the protective cover 300 from deforming.

[0039] Alternatively, there may be multiple protrusions 310 and slots 120, spaced circumferentially along the mounting hole 110. It is understood that by using multiple protrusions 310 and slots 120 to assemble the protective cover 300 with the disc brake end cover 100, the connection stability between the protective cover 300 and the disc brake end cover 100 can be improved.

[0040] In an alternative embodiment, the latching protrusion 310 is formed as an annular protrusion extending circumferentially along the mounting hole 110, and the latching groove 120 is formed as an annular groove extending axially along the mounting hole 110. It is understood that, compared to a configuration of multiple latching protrusions 310 cooperating with multiple latching grooves 120, designing the latching protrusion 310 as an annular protrusion and the latching groove 120 as an annular groove facilitates the manufacturing of both the latching groove 120 and the latching protrusion 310, thereby benefiting the manufacturing of the protective cover 300 and the disc brake end cap 100.

[0041] Of course, it should be noted that, in alternative embodiments, the slot 120 is disposed on the outer peripheral wall of the protective cover 300, and the protrusion 310 is disposed on the inner side wall of the mounting hole 110. In embodiments of this utility model, the slot 120 and the protrusion 310 can be selected according to actual needs. Furthermore, the number, distribution, and shape of the protrusion 310 and the slot 120 can all be selected according to actual needs, and the above parameters are not limited here.

[0042] In other embodiments of this utility model, the snap-fit ​​structure can also be formed in other forms. For example, hooks are provided on the outer peripheral wall of the protective cover 300 and the inner peripheral wall of the mounting hole 110. The protective cover 300 is fixed in the mounting hole 110 by the cooperation of the two hooks.

[0043] Optional, see reference Figure 3 As shown, a sealing element 400 is provided on the side of the protective cover 300 facing the oil seal 200. It can be understood that the added sealing element 400 can further enhance the sealing protection effect of the protective cover 300 on the oil seal 200, further reduce the entry of dust, moisture and impurities into the oil seal 200, and thus better protect the oil seal 200.

[0044] Further optional, see reference Figure 3 As shown, the protective cover 300 has a mounting groove 320 on the side facing the oil seal 200, and the seal 400 is filled in the mounting groove 320. It is understandable that filling the mounting groove 320 with the seal 400 allows for the selection of a seal 400 of appropriate thickness according to actual needs, ensuring effective blocking of dust, moisture, and impurities. Furthermore, it improves the installation stability of the seal 400, preventing it from falling off.

[0045] In this embodiment, the seal 400 is wool felt. Of course, in other embodiments of this utility model, the seal 400 can also be made of other materials according to actual needs, and is not limited to wool felt in this embodiment.

[0046] Alternatively, the inner peripheral wall of the protective cover 300 may be located outside the inner peripheral wall of the seal 400. Understandably, during actual assembly, both the protective cover 300 and the seal 400 are fitted onto the motor shaft 600. The fact that the inner peripheral wall of the protective cover 300 is located outside the inner peripheral wall of the seal 400 prevents the inner peripheral wall of the protective cover 300 from contacting the motor shaft 600. Only the seal 400 contacts the motor shaft 600, thus ensuring a seal while reducing wear on the motor shaft 600.

[0047] Optionally, a stop ring 130 is provided inside the mounting hole 110, and the side of the oil seal 200 facing away from the protective cover 300 abuts against the stop ring 130. It can be understood that the stop ring 130 can play a positioning role when installing the oil seal 200, ensuring that the oil seal 200 can be installed in the designated position. In actual operation, the stop ring 130 can also prevent the oil seal 200 from shifting inwards, ensuring the installation stability of the oil seal 200, thereby ensuring the sealing effect of the oil seal 200 on the internal environment of the external rotor hub motor.

[0048] Optionally, the disc brake end cap 100 has multiple fixing holes 140 along its circumference. The mounting component passes through the fixing holes 140 and connects to the wheel hub 500 to mount the disc brake end cap 100 onto the wheel hub 500. Understandably, during actual installation of the disc brake end cap 100, it can be placed on the wheel hub 500, aligning the fixing holes 140 with the positioning holes on the wheel hub 500. Then, the mounting component is inserted into the fixing holes 140 and the positioning holes. This method of connecting the disc brake end cap 100 to the wheel hub 500 using a mounting component simplifies the assembly of the disc brake end cap 100 and facilitates operation. Furthermore, it improves the connection stability between the disc brake end cap 100 and the wheel hub 500, thereby enhancing the reliability of the external rotor hub motor.

[0049] In embodiments of this utility model, the mounting component can be a screw, a pin, or a rivet, whichever can be selected according to actual needs. Furthermore, in other embodiments of this utility model, the disc brake end cap 100 can also be directly fixed to the wheel hub 500 by welding or other connection methods, and is not limited to the mounting component fixation in this embodiment.

[0050] This utility model also discloses an external rotor hub motor, see reference. Figures 5-6 As shown, the external rotor hub motor includes a motor assembly 700, a hub 500, a motor shaft 600, a disc brake pump 800, and the disc brake cover assembly mentioned earlier. The hub 500 is connected to the rotor of the motor assembly 700, the motor shaft 600 is connected to the stator of the motor assembly 700, the disc brake cover assembly is mounted on the hub 500, and the disc brake pump 800 is connected to the motor shaft 600. Due to the disc brake cover assembly mentioned earlier, this external rotor hub motor can prevent external foreign objects from directly impacting the oil seal 200, ensuring that the oil seal 200 will not shift or loosen during operation, reducing the probability of the motor rusting and failing to start due to oil seal 200 failure.

[0051] Optionally, the external rotor hub motor also includes a disc brake bracket 900, which is fitted onto the motor shaft 600 and locked by a locking member 1000. The disc brake pump 800 is mounted on the disc brake bracket 900. It is understood that supporting the disc brake pump 800 between the disc brakes improves the installation stability of the disc brake pump 800, ensuring its stable operation. Furthermore, assembling the disc brake pump 800 facilitates operation and improves the manufacturing efficiency of the external rotor hub motor.

[0052] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A disc brake cover assembly, characterized in that, include: Disc brake end cap (100), the disc brake end cap (100) is used to connect with the hub (500) of the outer rotor hub motor, and the disc brake end cap (100) is provided with a mounting hole (110) for the motor shaft (600) of the outer rotor hub motor to pass through. An oil seal (200) is sleeved on the motor shaft (600) and installed in the mounting hole (110); A protective cover (300) is installed on the motor shaft (600). The protective cover (300) is installed in the mounting hole (110) by a snap-fit ​​structure and is located outside the oil seal (200) along the axial direction of the motor shaft (600).

2. The disc brake cover assembly according to claim 1, characterized in that, The buckle structure includes a slot (120) and a protrusion (310). One of the slot (120) and the protrusion (310) is provided on the outer peripheral wall of the protective cover (300), and the other of the slot (120) and the protrusion (310) is provided on the inner side wall of the mounting hole (110).

3. The disc brake cover assembly according to claim 2, characterized in that, There are multiple card protrusions (310) and card slots (120), and they are spaced apart circumferentially along the mounting hole (110).

4. The disc brake cover assembly according to claim 2, characterized in that, The latching protrusion (310) is formed as an annular protrusion extending circumferentially along the mounting hole (110), and the latching groove (120) is formed as an annular groove extending axially along the mounting hole (110).

5. The disc brake cover assembly according to any one of claims 1-4, characterized in that, The protective cover (300) is provided with a sealing element (400) on the side facing the oil seal (200).

6. The disc brake cover assembly according to claim 5, characterized in that, The protective cover (300) has a mounting groove (320) on the side facing the oil seal (200), and the sealing element (400) is filled in the mounting groove (320).

7. The disc brake cover assembly according to any one of claims 1-4, characterized in that, A stop ring (130) is provided in the mounting hole (110), and the oil seal (200) abuts against the stop ring (130) on the side away from the protective cover (300).

8. The disc brake cover assembly according to any one of claims 1-4, characterized in that, The disc brake end cap (100) is provided with a plurality of fixing holes (140) along its circumference. The mounting component passes through the fixing holes (140) and is connected to the wheel hub (500) to install the disc brake end cap (100) on the wheel hub (500).

9. An external rotor hub motor, characterized in that, The device includes a motor assembly (700), a wheel hub (500), a motor shaft (600), a disc brake pump (800), and a disc brake cover assembly as claimed in any one of claims 1-8, wherein the wheel hub (500) is connected to the rotor of the motor assembly (700), the motor shaft (600) is connected to the stator of the motor assembly (700), the disc brake cover assembly is mounted on the wheel hub (500), and the disc brake pump (800) is connected to the motor shaft (600).

10. The external rotor hub motor according to claim 9, characterized in that, It also includes a disc brake bracket (900), which is sleeved on the motor shaft (600) and locked by a locking member (1000), and the disc brake pump (800) is mounted on the disc brake bracket (900).

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