Waterproof motor of electric vehicle

Abstract

The utility model relates to the technical field of motor waterproofing, and discloses a waterproof motor of an electric vehicle, which comprises a motor shell, a motor cover, a rotor, magnets and a connecting shaft, the top of the motor shell is clamped with the motor cover, the inner wall of the motor shell is fixedly connected with two groups of magnets, and the axis of the motor shell is movably connected with the connecting shaft. When the first sealing structure works, the sealing block is fixed to the position, corresponding to the top of the magnet, of the inner wall of the motor shell, the first containing groove is formed in the top of the sealing block and used for containing the first sealing ring, and the first sealing ring is located in the first containing groove. The first sealing ring is arranged in the motor shell and movably connected with the second containing groove formed in the bottom of the motor cover, sealing between the motor shell and the motor cover is formed, the first containing groove and the second containing groove only wrap the first sealing ring, the situation that heat of the motor makes direct contact with the first sealing ring is avoided, and the waterproof time of the sealing ring is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motor waterproofing, and specifically relates to a waterproof motor for electric vehicles. Background Art

[0002] A waterproof motor for an electric vehicle is a special type of motor that, through special structural design and material selection, can prevent water or moisture from entering the interior of the motor, ensuring that the motor can operate normally in a humid or underwater environment without being damaged by water.

[0003] According to CN202020765929.4 disclosed in the Chinese patent, in this application document, by setting a partition net frame and a filler, when a certain amount of water vapor and dust enter the motor, the filler in the partition net frame can adsorb the dust and water vapor, preventing the water vapor and dust from affecting the use of the motor;

[0004] Although the partition net frame and filler in the application document can effectively handle the problems of water vapor and dust, during use, since a permanent magnet DC motor is usually used for the waterproof motor of an electric vehicle, only a rubber ring is used to seal the outer shell and the cover. The heat generated during the operation of the motor will be conducted to the outer shell and the cover, thereby affecting the rubber ring. Rubber materials are prone to aging in a high-temperature environment, manifested as hardening, embrittlement, and even loss of elasticity, thus reducing the waterproof performance. For this reason, we propose a waterproof motor for electric vehicles. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a waterproof motor for electric vehicles, which solves the above problems.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the utility model provides the following technical solution: A waterproof motor for an electric vehicle, comprising a motor housing, a motor cover, a rotor, a magnet, and a connecting shaft. The motor cover is snap-connected to the top of the motor housing. Two groups of magnets are fixedly connected to the inner wall of the motor housing. A connecting shaft is movably connected to the center of the motor housing, and a thread is provided at the top of the connecting shaft. A rotor is fixedly connected to the outside of the connecting shaft. It further includes:

[0009] A first sealing structure provided on the top of the magnet, which is used to seal between the motor housing and the motor cover;

[0010] A sealing compensation structure provided at the bottom of the motor cover, which is used to compensate for the sealing of the first sealing structure.

[0011] Preferably, the first sealing structure includes a sealing block, a first placement groove, a first sealing ring, and a second placement groove. A sealing block is fixedly connected to the inner wall of the motor housing at a position corresponding to the top of the magnet. A first placement groove is formed at the top of the sealing block. The inner wall of the first placement groove is movably connected to a first sealing ring. A second placement groove is formed at a position corresponding to the bottom of the motor cover on the outer side of the first sealing ring. The inner wall of the second placement groove is movably connected to the outer side of the first sealing ring.

[0012] Preferably, a first conical block is fixedly connected to the outer side of the connecting shaft at a position corresponding to the top of the rotor, and the first conical block is conical.

[0013] Preferably, the sealing compensation structure includes a second sealing ring and a second conical block. The outer side of the first conical block is movably connected to a second sealing ring. The top of the second sealing ring is movably connected to a second conical block, and the second conical block is conical. The top of the second conical block is movably connected to the bottom of the motor cover.

[0014] Preferably, a rotating shaft is fixedly connected to the center of the second conical block. One end of the rotating shaft penetrates the motor cover and extends to the outside. Two rotating blocks are fixedly connected to the top of the rotating shaft.

[0015] Preferably, a threaded groove is formed in the center of the rotating shaft. The inner wall of the threaded groove is threadedly connected to the outer side of the top of the connecting shaft.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present utility model provides a waterproof motor for electric vehicles, which has the following beneficial effects:

[0018] 1. In the waterproof motor for electric vehicles, when the first sealing structure works, the sealing block is fixed at the position corresponding to the inner wall of the motor housing and the top of the magnet. The first placement groove is formed at the top of the sealing block for placing the first sealing ring. The first sealing ring is located in the first placement groove and is movably connected to the second placement groove formed at the bottom of the motor cover, forming a seal between the motor housing and the motor cover. The first placement groove and the second placement groove only wrap the first sealing ring, avoiding the direct contact between the heat of the motor and the first sealing ring, and greatly improving the waterproof time of the sealing ring.

[0019] 2. In the waterproof motor for electric vehicles, when the sealing compensation structure works, it effectively compensates the first sealing structure. When the motor vibrates or the temperature changes during operation, resulting in changes in the sealing gap, the second sealing ring and the second conical block can adaptively adjust their positions to maintain the sealing effect and prevent internal leakage of the motor. Moreover, the second sealing ring is convenient to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is a schematic diagram of the disassembled overall structure of the present utility model;

[0022] Figure 3 is a schematic cross-sectional view of the overall structure of the present utility model;

[0023] Figure 4 is Figure 3 a partial enlarged schematic view of part A in

[0024] In the figure: 1, motor housing; 2, motor cover; 3, rotating shaft; 4, rotating block; 5, rotor; 6, magnet; 7, threaded groove; 8, sealing block; 9, first placement groove; 10, first sealing ring; 11, second placement groove; 12, connecting shaft; 13, first conical block; 14, second sealing ring; 15, second conical block. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] Please refer to Figures 1-4 , a waterproof motor for an electric vehicle, including a motor housing 1, a motor cover 2, a rotor 5, a magnet 6, and a connecting shaft 12. The motor cover 2 is snap-connected to the top of the motor housing 1. Two groups of magnets 6 are fixedly connected to the inner wall of the motor housing 1. The connecting shaft 12 is movably connected to the axis of the motor housing 1, and a thread is provided at the top of the connecting shaft 12. A rotor 5 is fixedly connected to the outside of the connecting shaft 12. It further includes:

[0027] A first sealing structure provided on the top of the magnet 6, which is used to seal between the motor housing 1 and the motor cover 2;

[0028] A sealing compensation structure provided at the bottom of the motor cover 2, which is used to perform sealing compensation on the first sealing structure. The motor housing 1 and the motor cover 2 form the main housing of the motor and are connected together by a snap connection. Two groups of magnets 6 are fixed to the inner wall of the motor housing 1, and they are used to generate electromagnetic interaction with the rotor 5 to drive the motor to rotate.

[0029] Furthermore, the first sealing structure includes a sealing block 8, a first placement groove 9, a first sealing ring 10, and a second placement groove 11. A sealing block 8 is fixedly connected to the corresponding position of the inner wall of the motor housing 1 and the top of the magnet 6. A first placement groove 9 is opened at the top of the sealing block 8. The inner wall of the first placement groove 9 is movably connected with a first sealing ring 10. A second placement groove 11 is opened at the corresponding position of the outer side of the first sealing ring 10 and the bottom of the motor cover 2. The inner wall of the second placement groove 11 is movably connected with the outer side of the first sealing ring 10. The sealing block 8 is fixed at the corresponding position of the inner wall of the motor housing 1 and the top of the magnet 6. The first placement groove 9 is opened at the top of the sealing block 8 for placing the first sealing ring 10. The first sealing ring 10 is located in the first placement groove 9 and is movably connected with the second placement groove 11 opened at the bottom of the motor cover 2 to form a seal between the motor housing 1 and the motor cover 2.

[0030] Furthermore, a first tapered block 13 is fixedly connected to the corresponding position of the outer side of the connecting shaft 12 and the top of the rotor 5, and the first tapered block 13 is conical.

[0031] Furthermore, the seal compensation structure includes a second sealing ring 14 and a second tapered block 15. The outer side of the first tapered block 13 is movably connected with a second sealing ring 14. The top of the second sealing ring 14 is movably connected with a second tapered block 15, and the second tapered block 15 is conical. The top of the second tapered block 15 is movably connected with the bottom of the motor cover 2. The first tapered block 13 is fixed at the corresponding position of the outer side of the connecting shaft 12 and the top of the rotor 5. The second sealing ring 14 is movably connected to the outer side of the first tapered block 13. When the rotating shaft 3 moves up and down, the second tapered block 15 can move accordingly to squeeze the second sealing ring 14, playing a role in seal compensation.

[0032] Furthermore, a rotating shaft 3 is fixedly connected to the center of the second tapered block 15. One end of the rotating shaft 3 penetrates through the motor cover 2 and extends to the outside. Two rotating blocks 4 are fixedly connected to the top of the rotating shaft 3. When the rotating blocks 4 are rotated, the rotating shaft 3 starts to rotate and moves downward, causing the second tapered block 15 to move downward and squeeze the second sealing ring 14, which can compensate for the change in the seal gap caused by the temperature change inside the motor and maintain the stability of the sealing performance.

[0033] Furthermore, a threaded groove 7 is opened at the center of the rotating shaft 3, and the inner wall of the threaded groove 7 is threadedly connected with the outer side of the top of the connecting shaft 12.

[0034] Working principle:

[0035] The motor housing 1 and the motor cover 2 form the main housing of the motor and are connected together by a snap connection. Two groups of magnets 6 are fixed to the inner wall of the motor housing 1, which are used to generate electromagnetic interaction with the rotor 5 to drive the motor to rotate. The sealing block 8 is fixed at the position corresponding to the top of the magnet 6 on the inner wall of the motor housing 1. The first placement groove 9 is opened at the top of the sealing block 8 for placing the first sealing ring 10. The first sealing ring 10 is located in the first placement groove 9 and is movably connected to the second placement groove 11 opened at the bottom of the motor cover 2 to form a seal between the motor housing 1 and the motor cover 2. The first conical block 13 is fixed at the position corresponding to the top of the rotor 5 on the outside of the connecting shaft 12. The second sealing ring 14 is movably connected to the outside of the first conical block 13. When the rotating shaft 3 moves up and down, the second conical block 15 can move accordingly to squeeze the second sealing ring 14 to play a role in seal compensation. The rotating shaft 3 is threadedly connected to the outside of the top of the connecting shaft 12 through the threaded groove 7 at its axis. One end of the rotating shaft 3 penetrates through the motor cover 2 and extends to the outside, and two groups of rotating blocks 4 are fixed thereon to provide an external operation interface for the user or tool to rotate the rotating shaft 3. When the rotating block 4 is rotated, the rotating shaft 3 starts to rotate and moves downward, causing the second conical block 15 to move downward and squeeze the second sealing ring 14, which can compensate for the change in the seal gap caused by the temperature change inside the motor and maintain the stability of the sealing performance.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof motor for an electric vehicle, comprising a motor housing (1), a motor cover (2), a rotor (5), a magnet (6) and a connecting shaft (12). The motor cover (2) is snap-connected to the top of the motor housing (1). Two groups of magnets (6) are fixedly connected to the inner wall of the motor housing (1). The connecting shaft (12) is movably connected to the axis of the motor housing (1), and a thread is provided at the top of the connecting shaft (12). A rotor (5) is fixedly connected to the outside of the connecting shaft (12), and it is characterized in that: Further included are: A first sealing structure disposed on the top of the magnet (6), which is used to seal between the motor housing (1) and the motor cover (2); A sealing compensation structure disposed at the bottom of the motor cover (2), which is used to perform sealing compensation on the first sealing structure.

2. The waterproof motor for electric vehicle according to claim 1, wherein: The first sealing structure includes a sealing block (8), a first placement groove (9), a first sealing ring (10), and a second placement groove (11). A sealing block (8) is fixedly connected to the inner wall of the motor housing (1) at a position corresponding to the top of the magnet (6). A first placement groove (9) is formed in the top of the sealing block (8). The inner wall of the first placement groove (9) is movably connected with a first sealing ring (10). A second placement groove (11) is formed in the position corresponding to the bottom of the motor cover (2) on the outer side of the first sealing ring (10). The inner wall of the second placement groove (11) is movably connected to the outer side of the first sealing ring (10).

3. The waterproof motor for an electric vehicle according to claim 1, characterized in that: A first conical block (13) is fixedly connected to the outer side of the connecting shaft (12) at a position corresponding to the top of the rotor (5), and the first conical block (13) is conical.

4. The waterproof motor for an electric vehicle according to claim 2, characterized in that: The sealing compensation structure includes a second sealing ring (14) and a second conical block (15). The outer side of the first conical block (13) is movably connected with a second sealing ring (14). The top of the second sealing ring (14) is movably connected with a second conical block (15), and the second conical block (15) is conical. The top of the second conical block (15) is movably connected to the bottom of the motor cover (2).

5. The waterproof motor for an electric vehicle according to claim 4, characterized in that: A rotating shaft (3) is fixedly connected to the center of the second conical block (15). One end of the rotating shaft (3) penetrates the motor cover (2) and extends to the outside. Two rotating blocks (4) are fixedly connected to the top of the rotating shaft (3).

6. The waterproof motor for electric vehicle according to claim 5, wherein: A threaded groove (7) is formed in the center of the rotating shaft (3). The inner wall of the threaded groove (7) is threadedly connected to the outer side of the top of the connecting shaft (12).

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