Electric vehicle wheel hub motor with waterproof and dustproof functions

Abstract

The utility model relates to a wheel hub motor with waterproof and dustproof functions for an electric automobile, which comprises a left shell and a right shell, an embedded ring and a matching ring are arranged between the left shell and the right shell, the near ends of the embedded ring and the matching ring are respectively provided with a convex structure, and the convex structures are arranged in a staggered manner. Therefore, an exchange channel between the connection part of the left shell and the right shell and the external environment becomes zigzag and narrow, and permeation of moisture and dust is effectively blocked. Besides, the near end of the left shell and the near end of the right shell are fixedly connected with rubber rings I respectively, it is ensured that the outer diameter length of the rubber rings I is smaller than the outer diameter length of the left shell and the outer diameter length of the right shell, the left shell and the right shell cannot make direct contact due to intervention of the rubber rings I, and therefore the heat isolation effect is achieved through air. At the moment, the waterproof and dustproof functions are achieved through surface tension of water and contact of the rubber ring I, and air flow cannot be hindered.

Description

Technical Field

[0001] This utility model relates to the field of hub motor housing technology, and in particular to a hub motor for electric vehicles with waterproof and dustproof functions. Background Technology

[0002] A hub motor, also known as an in-wheel motor, is an electromechanical device that integrates drive, transmission, and braking mechanisms within the wheel hub, directly affecting the rotation of the wheel. The design of this device allows the motor to be directly mounted inside the wheel hub.

[0003] In current technology, hub motors mainly consist of two housings: a right housing that is tightly connected to the hub and equipped with an output shaft structure; and a left housing that is not in direct contact with the hub. To prevent external dust from entering the hub motor, current technology typically focuses on sealing the gap between the left and right housings to eliminate potential flow channels.

[0004] However, in practice we have observed that if the left and right housings are completely isolated from the exchange of external gases, the heat generated when the hub motor is working causes the internal gas to expand. If it cannot be discharged in time, the high-pressure gas may cause new safety hazards.

[0005] Based on this, this study proposes an innovative design that aims to rationally configure the gas channel between the left and right housings to achieve gas exchange while effectively preventing the intrusion of dust and liquid, thereby ensuring the waterproof and dustproof performance of the hub motor for electric vehicles. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention proposes a hub motor for electric vehicles with waterproof and dustproof functions. This motor effectively prevents the intrusion of dust and liquids while achieving gas exchange, thus overcoming the problem in existing hub motors where expanding gas cannot be discharged in time when the internal temperature rises, and avoiding new risks arising from this.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A hub motor for electric vehicles with waterproof and dustproof functions includes a left housing and a right housing, which are fixedly connected by bolts. An embedded ring and a mating ring are respectively provided near the ends of the left and right housings, and the inner diameter of both the embedded ring and the mating ring is greater than the outer diameter of the left and right housings. Both the embedded ring and the mating ring have protrusions near their ends, and these protrusions are staggered. A rubber ring I is fixedly connected near the ends of the left and right housings, and the outer diameter of the rubber ring I is smaller than the outer diameter of the left and right housings. When the left and right housings are fixedly connected by bolts, the two rubber rings I abut against each other.

[0009] Preferably, a rubber ring II is fixedly connected to the outer wall of one of the protrusions on the mating ring, and a receiving groove is provided on the embedding ring for the rubber ring II, the receiving groove and the protrusion on the embedding ring being in the same vertical plane.

[0010] Preferably, the longitudinal section of the rubber ring II is a semi-arc structure, the end of the rubber ring II near the mating ring is a smooth flat structure, the thickness of the end of the rubber ring II near the embedded ring is less than the thickness of the end of the rubber ring II away from the embedded ring, and when the rubber ring II is inserted into the receiving groove, the protrusion on the rubber ring II and the embedded ring are in the same vertical plane.

[0011] Preferably, when the left and right housings are fixedly connected by bolts and the two rubber rings I abut against each other, the embedded ring and the mating ring do not contact each other.

[0012] Preferably, a rubber ring III is fixedly connected between the protrusion at the end of the embedded ring away from the left housing and the protrusion at the end of the mating ring away from the right housing, and the two rubber rings III are abutted together.

[0013] Preferably, the rubber ring I and rubber ring III have the same structure, and the longitudinal section of both rubber ring I and rubber ring III is an arc-shaped structure.

[0014] Preferably, the embedded ring is fixedly connected to the left housing, and the inner diameter of one of the protrusions on the embedded ring is equal to the outer diameter of the right housing. When the two rubber rings I abut, the inner wall of the protrusion on the embedded ring abuts against the outer wall of the right housing.

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

[0016] This invention utilizes the protrusions at the near ends of the embedded ring and the mating ring to make the exchange channel between the left and right shells and the external environment tortuous and narrow, effectively blocking the penetration of moisture and dust. Simultaneously, by constraining the outer diameter of rubber ring I to be smaller than the outer diameters of the left and right shells, the left and right shells cannot directly contact each other due to the intervention of rubber ring I, thus achieving thermal insulation using air. At this point, utilizing the surface tension of water, the contact of rubber ring I achieves waterproof and dustproof functions without obstructing gas flow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a partially enlarged schematic diagram of point A of this utility model.

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the embedded ring and the mating ring of this utility model.

[0020] In the diagram: 1. Left housing; 2. Bolt; 3. Right housing; 4. Embedded ring; 5. Mating ring; 6. Rubber ring I; 7. Protrusion; 8. Rubber ring II; 9. Rubber ring III. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0023] Please refer to Figure 1 As shown, this device is a hub motor for electric vehicles with waterproof and dustproof functions. Its structural design is consistent with existing technology devices, mainly consisting of a left housing 1 and a right housing 3. The left housing 1 and the right housing 3 are tightly and firmly fixedly connected by bolts 2, thereby ensuring the stability and excellent durability of the overall structure.

[0024] Please refer to Figure 2 and Figure 3 As shown, compared with existing devices, this device has an insert ring 4 and a mating ring 5 designed at the adjacent ends of the left housing 1 and the right housing 3, respectively. The inner diameter of these two annular structures is set to be larger than the outer diameter of the left housing 1 and the right housing 3, thereby ensuring that the presence of the insert ring 4 and the mating ring 5 will not cause any obstruction to the mating of the left housing 1 and the right housing 3.

[0025] Specifically, the embedded ring 4 is fixedly connected to the left housing 1, and the mating ring 5 is fixedly connected to the right housing 3.

[0026] Meanwhile, to further improve the sealing performance of the hub motor, protrusions 7 are provided at the adjacent ends of the embedded ring 4 and the mating ring 5. By arranging these protrusions 7 in an alternating manner, the exchange channel between the left housing 1 and the right housing 3 and the external environment becomes tortuous and narrow, thereby effectively preventing the intrusion of moisture and dust.

[0027] Furthermore, such as Figure 3 As shown, a rubber ring I6 is fixedly connected to each of the left and right housings 1 and 3 near their ends. By ensuring that the outer diameter of these rubber rings I6 is less than the outer diameter of the left and right housings 1 and 3, a stable fixation of the rubber rings I6 is achieved. This design prevents direct contact between the left and right housings 1 and 3 due to the presence of the rubber rings I6, thus ensuring a certain gap between them. This gap effectively achieves thermal insulation, preventing safety hazards caused by heat accumulation between the left and right housings 1 and 3.

[0028] Therefore, when the left housing 1 and the right housing 3 are fixedly connected by bolts 2, the two rubber rings I6 will fit tightly together, ensuring that the left housing 1 and the right housing 3 cannot directly contact each other due to the presence of the rubber rings I6.

[0029] Meanwhile, to ensure that the left housing 1 and the right housing 3 are firmly connected by bolts 2, and that the two rubber rings I6 are tightly fitted, the embedded ring 4 and the mating ring 5 will not come into contact. This measure is intended to ensure that when the temperature rises between the left housing 1 and the right housing 3 and the gas expands, the gas between the left housing 1 and the right housing 3 can be smoothly discharged to the external environment, thereby effectively avoiding potential dangers.

[0030] It is important to clarify that in practical applications, leveraging the inherent deformation properties of rubber and the surface tension of water, we employ a method of bonding two rubber rings (Ⅰ6) together. This ensures that the contact area between the two allows gas to pass through while preventing liquid penetration. This design effectively prevents external liquids from intruding into the area between the left shell 1 and the right shell 3.

[0031] Meanwhile, the mutual bonding of the two rubber rings I6 can further enhance the ability to block solid dust, thereby improving the overall dustproof performance.

[0032] Furthermore, a rubber ring II8 is fixedly connected to the outer wall of one of the protrusions 7 on the mating ring 5, and a corresponding receiving groove is formed on the inserting ring 4 for the rubber ring II8. At this time, by ensuring that the receiving groove and the protrusion 7 on the inserting ring 4 are in the same vertical plane, and that when the rubber ring II8 is inserted into the receiving groove, the rubber ring II8 and the protrusion 7 on the inserting ring 4 are also in the same vertical plane, the exchange channel between the inner and outer sides of the inserting ring 4 and the mating ring 5, that is, the connection part between the left housing 1 and the right housing 3, and the external environment becomes more tortuous and narrow.

[0033] Meanwhile, the longitudinal section of the rubber ring II8 is designed as a semi-circular structure, meaning that the end of the rubber ring II8 near the mating ring 5 is a smooth flat surface, while the thickness of the end near the embedded ring 4 is less than that of the end away from the embedded ring 4. This design aims to ensure the stability of the connection between the embedded ring 4 and the mating ring 5, preventing deformation of the embedded ring 4 and the mating ring 5 due to external impacts during actual installation, which would affect the device's function of restricting the exchange channel between the left housing 1 and the right housing 3 and the external environment.

[0034] Furthermore, to ensure that liquid and solid dust are effectively blocked from the outside, preventing them from clogging the gap between the embedded ring 4 and the mating ring 5, and to prevent the gas expanding between the left housing 1 and the right housing 3 from being unable to escape to the outside, a rubber ring III9 is ​​fixedly connected between the protrusion 7 at the end of the embedded ring 4 away from the left housing 1 and the protrusion 7 at the end of the mating ring 5 away from the right housing 3, respectively. These two rubber rings III9 are also designed to be in close contact. At this time, similar to rubber ring I6, the two rubber rings III9 can also achieve the effect of blocking solid dust and liquid through mutual contact.

[0035] Meanwhile, the structural design of rubber ring I6 and rubber ring III9 in this device is consistent, with their longitudinal sections both exhibiting an arc-shaped structure. This design aims to ensure that during assembly, the two rubber rings I6 and the two rubber rings III9 can deform and make tight contact, thereby reducing the thickness of the connection area and ensuring that gas can pass smoothly between the two rubber rings I6 and the two rubber rings III9.

[0036] Furthermore, the inner diameter of one of the protrusions 7 on the embedded ring 4 is exactly equal to the outer diameter of the right housing 3. When the two rubber rings I6 are tightly abutted, the inner wall of the protrusion 7 on the embedded ring 4 will also be tightly abutted with the outer wall of the right housing 3, thus ensuring the overall sealing performance.

[0037] In practical use, this utility model:

[0038] An insert ring 4 and a mating ring 5 are provided between the left housing 1 and the right housing 3. The ends of the insert ring 4 and the mating ring 5 have protrusions 7, which are staggered to create a tortuous channel to prevent moisture and dust intrusion. Simultaneously, rubber rings I6 are fixed between the left housing 1 and the right housing 3 respectively. These rubber rings I6 ensure a proper gap and achieve thermal insulation. Furthermore, the rubber rings I6 fit together, allowing gas to pass through while preventing liquid penetration, thus enhancing dustproof capabilities. Further, the rubber ring II8 on the mating ring 5 and the protrusions 7 on the insert ring 4 are in the same plane, further creating a tortuous channel. Moreover, a rubber ring III9 is ​​fixed between the outer ends of the insert ring 4 and the mating ring 5 to further enhance sealing performance, blocking solid dust and liquids from reaching the outside and preventing blockage of the tortuous channel between the insert ring 4 and the mating ring 5.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hub motor for electric vehicles with waterproof and dustproof functions, comprising a left housing (1) and a right housing (3), wherein the left housing (1) and the right housing (3) are fixedly connected by bolts (2), characterized in that: The left shell (1) and the right shell (3) are respectively provided with an embedded ring (4) and a mating ring (5) near their ends, and the inner diameter length of the embedded ring (4) and the mating ring (5) is greater than the outer diameter length of the left shell (1) and the right shell (3); Both the embedded ring (4) and the mating ring (5) are provided with protrusions (7) near their ends, and the protrusions (7) on the embedded ring (4) and the mating ring (5) are arranged alternately; A rubber ring I (6) is fixedly connected to the near end of the left shell (1) and the right shell (3). The outer diameter of the rubber ring I (6) is smaller than the outer diameter of the left shell (1) and the right shell (3). When the left shell (1) and the right shell (3) are fixedly connected by bolts (2), the two rubber rings I (6) abut against each other.

2. The wheel hub motor for electric vehicles with waterproof and dustproof functions according to claim 1, characterized in that: A rubber ring II (8) is fixedly connected to the outer wall of one of the protrusions (7) on the mating ring (5), and a receiving groove is provided on the embedded ring (4) for the rubber ring II (8), and the receiving groove and the protrusion (7) on the embedded ring (4) are in the same vertical plane.

3. A hub motor for electric vehicles with waterproof and dustproof functions according to claim 2, characterized in that: The longitudinal section of the rubber ring II (8) is a semi-arc structure. The end of the rubber ring II (8) near the mating ring (5) is a smooth plane structure. The thickness of the end of the rubber ring II (8) near the embedded ring (4) is less than the thickness of the end of the rubber ring II (8) away from the embedded ring (4). Furthermore, when the rubber ring II (8) is inserted into the receiving groove, the protrusion (7) on the rubber ring II (8) and the embedded ring (4) are on the same vertical plane.

4. A hub motor for electric vehicles with waterproof and dustproof functions according to claim 1, characterized in that: When the left housing (1) and the right housing (3) are fixedly connected by bolts (2), and the two rubber rings I (6) abut against each other, the embedded ring (4) and the mating ring (5) do not contact each other.

5. A hub motor for electric vehicles with waterproof and dustproof functions according to claim 1, characterized in that: A rubber ring III (9) is fixedly connected between the protrusion (7) at the end of the embedded ring (4) away from the left housing (1) and the protrusion (7) at the end of the mating ring (5) away from the right housing (3), and the two rubber rings III (9) are abutted together.

6. A hub motor for electric vehicles with waterproof and dustproof functions according to claim 5, characterized in that: The rubber ring I (6) and rubber ring III (9) have the same structure, and the longitudinal section of both rubber ring I (6) and rubber ring III (9) is an arc-shaped structure.

7. A hub motor for electric vehicles with waterproof and dustproof functions according to claim 1, characterized in that: The embedded ring (4) is fixedly connected to the left shell (1), and the inner diameter of one of the protrusions (7) on the embedded ring (4) is equal to the outer diameter of the right shell (3). When the two rubber rings I (6) abut, the inner wall of the protrusion (7) on the embedded ring (4) abuts against the outer wall of the right shell (3).

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